CN100574821C - Releasable injection device - Google Patents
Releasable injection device Download PDFInfo
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- CN100574821C CN100574821C CN200480041878A CN200480041878A CN100574821C CN 100574821 C CN100574821 C CN 100574821C CN 200480041878 A CN200480041878 A CN 200480041878A CN 200480041878 A CN200480041878 A CN 200480041878A CN 100574821 C CN100574821 C CN 100574821C
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- bridgeware
- automatic injector
- release member
- injection
- actuator
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Abstract
A kind of injection device that comprises elongate housing, be furnished with the container (3) that is used for active component in this shell, this shell comprises two housing parts (1 that can relative to each other move, 2), the active force of spring (107) can be fixed on this position to actuator (12) prestress and actuator (12) along injection direction.When on the skin that places patient, release member (20) is because housing parts (1,2) moving and move to the centre position from latched position relative to each other, and wherein actuator (12) still is locked in the centre position.Actuator (12) can move to the off-position from position in the middle of it, and in the off-position, actuator can be unlocked by the release member (18) of push-button control.This two-step process has prevented unexpected release reliably.
Description
Technical field
The present invention relates to a kind of injection device that is used to use injectable product, injectable product is liquid medicine such as insulin, growth hormone, heparin or osteoporosis preparation preferably, and injection device is injection pen or automatic injector preferably.
Background technology
The injection device of known many kind designs, they are specifically designed to uses the medicine of oneself being used by described patient.Discharge lock many having in the known automatic syringe, and it is used for preventing that injection process from inadvertently being triggered.An example of automatic injector discloses in patent documentation DE4037418, this automatic injector has the shell of the container that is used to hold active substance, and this shell is by forming along two parts that an axis relative to each other moves from first and second positions, automatic injector also has relieving mechanism, the distribution sector of the active substance that is used to provide and deliver and be the flip flop equipment of button form, by relieving mechanism distribution sector is remained on the position that makes distribution sector be subjected to the spring bias voltage, also can operate described button along described axis direction.In this case, a housing parts holds flip flop equipment, and another housing parts holds relieving mechanism, when two housing parts relative to each other are in primary importance, relieving mechanism is bigger when the distance of flip flop equipment is in the second position than it, and invalid to the operation of flip flop equipment.When housing parts is in the second position, the more close relieving mechanism of flip flop equipment, thereby be in the position that it can cause that distribution sector discharges.
Summary of the invention
With the background of the prior art photograph in pairs, the objective of the invention is to propose a kind of injection device, it provides the safety of higher degree for the casual triggering of defence, only needs several parts simultaneously.
The object of the invention is realized by the invention that can handle injection device based on a kind of automatic injector and a kind of trigger.Described automatic injector has elongate housing, be provided with the container that is used for the splendid attire active substance in the described elongate housing, described shell comprises at least two housing parts that can relative to each other move, wherein, described automatic injector also comprises can be by the active force of at least one spring along the injection direction actuator of bias voltage forward, can move to the release member of an off-position from a latched position, in described latched position, described actuator is locked in biased position forward, and in described off-position, described actuator is disengaged locking and triggers part; It is characterized in that, can make described release member move to the centre position by the relative motion of described housing parts from its latched position, in described centre position, described actuator is locked, enters described off-position and described triggering part can make described release member shift out described centre position.
The described injection device that triggers actuating comprises housing parts; The reservoir that is used for injectable product; The entry needle that has needle point at far-end; Needle guard, its can with respect to described housing parts and described entry needle from the protective position displacement till surpassing described needle point, and be displaced to retracted position backward along proximal direction, in described protective position, described needle guard surrounds described entry needle; The driving mechanism that is used to inject, it is locked in the releasable maintenance joint to prevent actuation movement; Bridgeware, itself and described needle guard are coupled, so that described needle guard makes described bridgeware move to coupling position from latched position along moving of proximal direction; With the actuatable triggering part that is used to trigger described driving mechanism, it is coupled with described bridgeware when activating when described bridgeware presents coupling position, and it makes described bridgeware shift out described coupling position and enters the off-position, wherein, the maintenance of described driving mechanism engages and is not released, till described bridgeware is in described off-position.
In one embodiment of the invention, injection device comprises housing parts, be used for reservoir, entry needle, needle guard, the driving mechanism that is used to inject that product to be injected is an active component and be used to trigger the trigger mechanism of driving mechanism, and another housing parts of housing parts or coupled injection device is directly formed reservoir.Yet reservoir preferably is contained in the container in this housing parts or another housing parts.Injection device preferably has the reservoir keeper, and it holds reservoir and makes the reservoir centering, and itself is accommodated in and places the center in the housing parts and in housing parts.Entry needle can be installed on the reservoir especially or also be contained in basically on the reservoir keeper.Therefore, it is axially outstanding forward, preferably begins axially outstandingly forward from reservoir or reservoir keeper, and is that far-end has needle point in its front portion.Needle guard joins on the housing parts; so that it can begin backward from protective position with respect to entry needle especially with respect to housing parts; be nearside ground; preferably axially; till moving to retracted position with respect to housing parts and entry needle; in protective position, entry needle is enclosed to the point above its needle point.Needle guard can be complete observable preventer, and it can overcome to move with returning elastically the active force nearside and work as to discharge when returning active force and is pushed back along distal direction once more.Yet, alternatively, also it can be locked in protective position to prevent return movement, in this case, must before injection, discharge locking action, it can releasablely maybe can not discharge afterwards.
Driving mechanism can comprise the dispensing driver that has conveying member or actuator and the dispensing driver of actuator, and actuator works so that dispensing to the product that is arranged in the reservoir.At injection device is in the preferred embodiment of automatic injector, and driving mechanism not only has this dispensing driver, and has the injection drive of entry needle in addition.This is such situation, promptly can drive dispensing driver and injection drive with same forcer, and for example, mechanical spring preferably is added to the helical spring of specified pressure in advance, serves as injection drive and dispensing driver.Yet, also can provide independent forcer in two drivers each, for example be added to the helical spring of specified pressure in advance.Preferably, injection drive presented the forcer of elasticity tense situation in particular before injection, and its drives entry needle from the injection beginning, was expelled to entry needle in the skin or preferably made entry needle pass skin so that promptly drive forwards direction along distal direction.Design driven mechanism like this, promptly it is only realized causing the actuation movement of dispensing effect or causes dispensing and the actuation movement of pro-injection, or it can realize that an actuation movement that is used for initial injection is used for the actuation movement of delivery process with another.
When injection device was in the original state, driving mechanism remained in the releasable maintenance joint, so it can not be realized any actuation movement and can not realize causing the actuation movement that entry needle is injected especially.If injection device is not automatic injector but has entry needle and the user must the own syringe of injecting by entry needle, the dispensing driver then only is provided, thereby keeps engaging and just be embodied on the dispensing driver.
In order to trigger driving mechanism, mobile housing parts or needle guard, triggering element or triggering part and release member, bridgeware collaborative work each other especially.In this embodiment, the coupled to each other so that needle guard of bridgeware and needle guard leaves motion that protective position enters retracted position and causes that bridgeware leaves the motion that breech lock or latched position enter coupling or centre position.In case bridgeware presents coupling position, just can trigger part and make and trigger part and move to during the coupling of bridgeware engages by operation.In coupling engaged, the triggering campaign of the triggering part that causes by actuating was transformed into bridgeware and leaves the motion that coupling position enters the off-position, as long as bridgeware does not present the off-position, it just prevents that the maintenance joint of driving mechanism is released.Keep joint directly or by one or more middlewares to be present between driving mechanism and the housing parts, this means that in maintained joint driving mechanism can not be realized any actuation movement with respect to housing parts.Actuation movement is or comprises along the preferred axes of driving mechanism that drives forwards direction to linear movement, preferably along the preferred axes of the driving mechanism of distal direction to linear movement.If injection device is an automatic injector, then driving mechanism preferably with entry needle coupling so that it drives entry needle along driving direction, promptly along the direction driving entry needle of its own actuation movement.
Bridgeware will be from latched position via the motion of coupling position till the off-position as a unit channeling conduct, the result makes that the required number of components of triggering system is few.Preferably bridgeware is fabricated to single parts, but bridgeware also can be an assembly structure in principle, although the motion till from the latched position to the off-position is used as unit and realizes, is single rigid body as it, be like this at least to relating to till this motion.
The motion that bridgeware enters the off-position from latched position is preferably only along the moving of single direction, preferably along the axially-movable of proximal direction.
It is preferably outstanding so that it can be by straightforward manipulation from housing parts to trigger part, and it preferably triggers button, i.e. button.The motion that realizes when operation triggers part preferably becomes horizontal motion with the nearside-distally axis of injection device.
Preferably the coupling that obtains to trigger between part and the bridgeware based on sliding pressure contact engages, bridgeware and trigger that in the part at least one served as switching cam and another serves as the fastener that slides on switching cam.When bridgeware presents coupling position,, in the sliding pressure contact, trigger part bridgeware is pushed the off-position from coupling position owing to the sliding pressure contact is set up in the triggering campaign that triggers part.
The position that is presenting during before bridgeware is presenting the off-position, injecting, it locks blocking mechanism, and blocking mechanism guarantees that the maintenance between driving mechanism and the housing parts engages, and prevents to keep engaging to be released.Blocking mechanism is discharged this joint by the direction fexible bias pressure that keeps towards release engaging but bridgeware prevents blocking mechanism.Bridgeware preferably pushes the latching member of blocking mechanism in the maintenance joint.Bridgeware is designed like this, and promptly it allows latching member to break away from the maintenance joint fast in the off-position, keeps joint thereby discharge automatically.
Be among the class embodiment of automatic injector form in the present invention, trigger part or trigger and move in the plane that element can transversely be provided with at the longitudinal direction with automatic injector and release member can move along the longitudinal direction of automatic injector.For example can release member be moved to the centre position from latched position by making housing parts or partly relative to each other moving, in the centre position, be the release member form bridgeware can with locking device as injection latching member collaborative work, locking device guarantees actuator or drives forwards member to be in latched position.When release member mediated, it can further move to the off-position, discharges actuator in the off-position by release member, and for this reason, release member can have with the release member collaborative work so that make release member move to the guiding mechanism of off-position.Guiding mechanism for example can be set as the form on a surface, and this surface is arranged on the release member at angle with respect to the automatic injector longitudinal axis, triggers on the part but preferably be arranged on.When operation triggered part, the edge of release member moved so that it is positioned on the inclined surface that triggers part and when actuating triggered part, release member was shifted onto the off-position along inclined surface.
As long as release member is in latched position, release member is operated and will can not triggered automatic injector, preferably release member is biased into from the outstanding position of automatic injector by spring.About such embodiment, trigger automatic injector with two independently operating procedures that are separated from each other, thereby can not inadvertently trigger automatic injector in addition.
Locking is not relative to each other moved along the longitudinal direction with unlock mechanism and triggering part, they move in the plane that the longitudinal axis with automatic injector transversely is provided with, as its result, needn't other space be provided for these parts along the longitudinal direction of automatic injector, this means and generally automatic injector to be made short design.
In another embodiment, trigger part and can move along the longitudinal direction of automatic injector, this makes that operating trigger mechanism at an end of automatic injector is easy to.In this embodiment, the release member that is in its latched position prevents to trigger part and moves along it, and this has guaranteed at first to settle automatic injector, pressing operation spare then.In a class embodiment, move in the plane that release member can transversely be provided with at the longitudinal direction with automatic injector, therefore, in a modification, can guide release member so that its realization translational motion from the latched position to the off-position.This is such situation, and promptly release member preferably has the hole that is the keyhole shape and be provided with cannelure on actuator, and when release member was in latched position, the elongated portion of this hole of button was bonded in the cannelure.In another modification, release member is designed like this, and promptly it realizes rotatablely moving from the latched position to the off-position.In this case, release member have non-circular hole and on actuator, be provided with the band non-circular cross sections head, when being in the off-position except release member, this head does not pass described hole.Two modification only need several independent parts and operation cheap automatic injector reliably can be provided.
Also described preferable feature and their combination in the dependent claims, feature of describing in these claim and above-described feature advantageously complement each other.
Description of drawings
Describe the example of embodiment below with reference to the accompanying drawings, the feature that discloses in the description of embodiment example has been set forth the theme of claim individually and in any combination way, and has also advantageously replenished above-mentioned design, in the accompanying drawing:
Fig. 1 represents to be in first example of the embodiment that injects the automatic injector in the original state before;
Fig. 2 represents to be in needle guard, bridgeware and the triggering part of the automatic injector in the original state;
The cross section, A-A of pointing out in Fig. 3 presentation graphs 1;
Before being illustrated in and triggering, Fig. 4 is positioned at the automatic injector of first embodiment on the injection point;
Fig. 5 represents to be in needle guard, bridgeware and the triggering part of the automatic injector in the state shown in Fig. 4;
Cross section B-B shown in Fig. 6 presentation graphs 4;
Fig. 7 is illustrated in the automatic injector that triggers first embodiment of state inside on injection point;
Fig. 8 represents to be in needle guard, bridgeware and the triggering part in the triggering state;
Cross section C-C shown in Fig. 9 presentation graphs 7;
Figure 10 represents to be in second example of the embodiment of the automatic injector in the original state;
Figure 11 is illustrated in the vertical section as the different designs of the automatic injector that proposes by the present invention in the state that is provided; With
Figure 12 a represents three positions of release member in the cross section that designs shown in Figure 11 to 12c.
The specific embodiment
Fig. 1 represents first example of the embodiment of an automatic injector.Form design automatic injector with injection pen (or injection pen).It comprises the sleeve-shaped nearside housing parts 1 and the sleeve-shaped distally housing parts 2 that serve as grasping piece.Sleeve-shaped distally housing parts 2 forms needle guard 2a at its far-end.Housing parts 2 is directed axially linearly along public longitudinal axes L in housing parts 1.
But a driving mechanism is contained in the housing parts 1 and is mounted to axial displacement.This driving mechanism comprises the dispensing driver that is used for dispensing and is used for driving at first the injection drive of entry needle 5.Dispensing spring 10 forms the dispensing driver.Dispensing spring 10 works by dispensing member 11, and in this example of embodiment, it is arranged on actuator 4 with the telescopic form of dispensing that is used for driving product.Owing to be the design of the actuator 4 of translation plunger form, dispensing member 11 is plunger rods.Dispensing spring 10 is along driving forwards direction V bias voltage dispensing member 11, yet when automatic injector is in the original state, dispensing member 11 is in the maintenance joint that the member 11 that prevents to provide and deliver moves forward.
Also the form of promptly injecting spring 13 with spring is provided with injection drive, and when automatic injector was in the original state, injection spring 13 was also by along driving forwards direction V bias voltage.Because its elastic acting force, 13 pairs on spring of injection drives forwards member 12 and exerts pressure, drive forwards member 12 and overcome the active force of injection spring 13 and remain on the maintenance engagement state, and prevent to drive forwards member 12 and implement to drive forwards motion with respect to housing parts 1.Drive forwards member 12 and surround dispensing member 11, in axial direction provide support and linear guide for the latter.Dispensing spring 10 and injection spring 13 all are supported on the housing parts 1 along the direction opposite with driving forwards direction V, injection spring 13 directly is supported on the rest pad 8, rest pad 8 can not axially and move radially and also not rotate, link to each other with housing parts 1 regularly in this sense, supporting member 8 also forms the axial linear guiding piece that drives forwards member 12.
The maintenance junction surface that drives forwards member 12 comprises that one is the injection latching member 15 and a protuberance of moving engaging of elasticity wink device (or snapper) form, by this protuberance, injection latching member 15 projects into and is located at sleeve-shaped and drives forwards in the recess 14 on the outer surface of member 12.Injection latching member 15 can not move axially with respect to housing parts 1, and with the periphery setting of several injection latching members 15 around sleeve body, each injection latching member 15 all is the form of axial elasticity tongue.
For the maintenance that dispensing member 11 is provided engages, drive forwards member 12 and also on its near-end, have several elasticity tongues that serve as the latching member 16 of provide and deliver, by each latching member 16 of providing and delivering be formed for providing and delivering stop part that drives forwards of member 11.The identical sleeve body of formation injection latching member 15 will be provided and delivered, and latching member 16 is radially inwardly shifted onto and the maintenance engagement state of the member 11 of providing and delivering.
To inject latching member 15 by bridgeware 20 and radially inwardly push the maintenance engagement state, and promptly push and be the circumferential slot form and be arranged in a plurality of recess 14 or this recess 14 that drive forwards in the member 12.For this reason, bridgeware 20 have surround the cannula portion drive forwards member 12 and a plurality of injection latching members 15 and a plurality of injection latching members 15 are pushed a plurality of recess 14 or the recess 14 that circumferentially extends in.Supporting member 8 is for bridgeware 20 provides a support, makes axially displacement of bridgeware 20.The sleeve body of supporting member 8 and/or formation injection latching member 15 in axial direction guides bridgeware 20 linearly.Bridgeware 20 is axial compressive force with housing parts 2 and contacts, and causes housing parts 2 moving and the same movement of bridgeware 20 along the direction opposite with driving forwards direction V.At last, bridgeware 20 is supported on the housing parts 1 along the direction opposite by back-moving spring 23 with driving forwards direction V.In original state, bridgeware 20 presents the axial lock allocation, bridgeware 20 will inject at the axial lock allocation that latching member 15 is locked in them with the maintenance engagement state that drives forwards member 12.
In the portions of proximal of housing parts 1, trigger part 18 and radially outward stretch out from its outer surface.Triggering part 18 can deeper be pushed in the housing parts 1, preferably can operate this triggering part 18 by applying radial pressure, and because operation like this, triggering part 18 moves along the direction of the middle longitudinal axes L horizontally set of the automatic injector that drives forwards direction V about sensing, radially moves in the present embodiment.
Fig. 2 represents to have needle guard 2a, bridgeware 20 that extracts at relative position from the automatic injector shown in Fig. 1 and the housing parts 2 that triggers part 18, needle guard 2a, bridgeware 20 and trigger the state that part 18 presents at this relative position when automatic injector is in original state.Between housing parts 2 and bridgeware 20, only there is the axial compressive force contact, triggers not joint of part 18 and bridgeware 20.Yet as shown in the figure, be provided with switching cam 19, it is with respect to driving forwards direction V and tilting with respect to the direction of the transverse movement that triggers part 18.Drive forwards the direction of direction V and transverse movement, promptly trigger the triggering travel direction of part 18, be orientated with being perpendicular to one another.Switching cam 19 points to the direction opposite with driving forwards direction V.Bridgeware 20 is provided with cam 21, the fastener during the coupling of cam 21 formation bridgewares 20 and triggering part 18 engages, and slip on switching cam 19 when triggering part 18 realizes that its triggering is moved.Bridgeware 20 also is provided with switching cam 22, and here as among the embodiment shown in the example, switching cam 22 is located on the rear surface of cam 21.Switching cam 22 is not being carried out any function aspect the triggering automatic injector.It only revises the position of triggering part 18 under the situation that inadvertently promotes triggering part 18 when automatic injector is in the original state.Two switching cams 19 and 22 promptly only tilt along straight-line extension.Yet in principle, non-linear profile also is feasible.
Fig. 3 shows especially by the triggering part 18 of cross section, A-A shown in Fig. 1 and bridgeware 20 and their switching cam 19 and 22.
In case automatic injector is positioned on the desirable injection position on the skin, the first step of injection relates to pressure is applied on the injection point, so as needle guard 2a and thereby whole casing part 2 move with respect to housing parts 1 proximad, promptly deeper enter in the housing parts 1, till the far-end with the far-end of needle guard 2a and housing parts 1 is arranged on identical axial height.
Automatic injector when this that Fig. 4 is illustrated in injection finishes phase I.Because needle guard 2a moves backward to the retracted position shown in Fig. 4, above the retracted position needle point was located immediately at skin, needle guard 2a and housing parts 2 had made bridgeware 20 move their own distances of particularly moving backward with respect to triggering part 18 with respect to housing parts 1 backward.
Fig. 5 provides housing parts 2, bridgeware 20 and has triggered the especially clearly diagram of the part 18 present relative positions that presented.Bridgeware 20 is such with respect to the axial location that triggers part 18, and promptly when depressing when triggering part 18, the triggering campaign that switching cam 19 realizes triggering parts 18 to be producing the pressure sliding-contact with cam 21, and in the pressure sliding-contact along cam 21 slips.Therefore, the axial location that bridgeware 20 is presented now is called coupling position.
When bridgeware 20 is in coupling position and by pushing when triggering part 18 and triggering injection, trigger part 18 with respect to housing parts 1, particularly move towards its cam 21 with respect to bridgeware 20, move to described sliding pressure contact condition with cam 21, and because the slope profile of switching cam 19, thereby actuating cam 21 and along with its promotes bridgeware 20 along the direction opposite with driving forwards direction V, promptly it is along proximal direction pulling bridgeware 20.Cam 21 formation one are used for the joint element of this axially-movable of bridgeware 20, and it slides along switching cam 19 when triggering part 18 is pushed into.Owing to trigger that part 18 is directed and only realize radially triggering motion and can not axially move, enter into axial end position so bridgeware 20 is further pulled back along direction opposite with driving forwards direction V by its cam 21 with respect to housing parts 1.
Automatic injector after Fig. 7 represents to trigger promptly triggers part 18 and has realized that its triggering motion and bridgeware 20 with respect to triggering part 18, particularly present its proximal location with respect to injection latching member 15.Bridgeware 20 will have been injected the maintenance engagement state that member 12 was shifted and driven forwards to latching member 15 onto up to now by its cannula portion, in its cannula portion, bridgeware 20 has a recess 24 and in as the embodiment shown in the example, form with the wide region of extending around the inner surface of the cannula portion of bridgeware 20 is provided with recess 24, and this wide region stops bridgeware at far-end.When bridgeware 20 was in proximal location, injection latching member 15 was because the elastic recoil power of their natures and engaging radially outward, broke away to engage with the maintenance that drives forwards member 12 to enter in the recess 24.Thereby discharged that the maintenance that drives forwards member 12 engages and the injection spring 13 by anxiety drives forwards member 12 along driving forwards direction V.When driving forwards member 20 and driven forwards, its pushing reservoir keeper 6, reservoir keeper 6 moves along driving forwards direction V with the reservoir 3 that holds within it.In driving forwards the process of motion, entry needle 5 shifts out housing parts 1 and 2 and enter and preferably pass skin forward.Drive forwards the restriction that motion is subjected to a block piece that drives forwards of member 12.
Drive forwards driving forwards of member 12 and move and therefore one end of injection movement forward of entry needle 5, dispensing latching member 16 just moves in the recess 17 that also forms the sleeve body of injecting latching member 15, and is engaged in the recess 17.Because the snap action forward of dispensing latching member 16, the maintenance of dispensing member 11 engage and to be released and its 12 slides with respect to driving forwards member along driving forwards direction V now.Thereby dispensing member 11 and actuator 4 contact and in reservoir 3 actuator 4 are pushed to forward the outlet of memory 3.As a result, from reservoir 3 with by entry needle 5 dispensings and products applied.
Fig. 8 provides housing parts 2, bridgeware 20 and triggered another detailed icon of the axial location that part 18 relative to each other presents along them after triggering, Fig. 9 represent same state but expression be cross section by the C-C shown in Fig. 7.
Figure 10 represents second example of the embodiment of automatic injector, the automatic injector of second embodiment only is being different from the embodiment that describes as first example aspect its injection latching member, the injection latching member in the embodiment that sets forth as second example by Reference numeral 25 expressions.Latching member 25 is ball bearing or cylindrical pin, and it also keeps engaging to prevent that them from moving to break away from by bias voltage radially outward with by bridgeware 20 lockings.On this degree, the bridgeware 20 of second embodiment is consistent with the bridgeware of the embodiment that describes as first example especially.Do not have different about collaborative work with needle guard 2a and triggering part 18 yet.Unique difference relate to another aspect and with by needle guard 2a or housing parts 2, bridgeware 20 with trigger part 18 formed trigger mechanisms and have no relation, aspect this, the explanation that provides with reference to first embodiment is suitable for.
Also can be described in the embodiment that describes among Fig. 1 to 10 in the following manner.Along with automatic injector, plane intrinsic displacement and release member 20 that triggering part 18 can transversely be provided with at the longitudinal direction with automatic injector can be along the longitudinal direction displacements of automatic injector.With telescopic form release member 20 is set, it can and be arranged within these housing parts with respect to preceding, distally and back nearside housing parts 1 and 2 axial displacements.Trigger part 18 by forming from the outwards outstanding button in the side of automatic injector.In Fig. 1 and 2, release member 20 is in latched position or protective position, promptly is in the position spaced apart with triggering part 18, and in this latched position by means of volute spring 23 bias voltage forward.This is such situation, it is release member 20 and the locking mechanism collaborative work of the form that is two relative lock arms 15 of putting of crouching, lock arm 15 is biased and be bonded in the recess 14 on the actuator 12, thereby lock drive part 12 makes actuator 12 not to be pushed forward.Naturally, only also can provide a lock arm or more than two lock arm.Telescopic inner surface by release member 20 is biased into lock arm 15 forward in the recess 14 of actuator 12.Locking mechanism also can be configured to ball bearing or by the form of the annular element of bias voltage forward, for example, in locking relation with the ball bearing of actuator collaborative work or by the form of the annular element of bias voltage forward.
In Figure 4 and 5, release member 20 is represented as and mediates or coupling position.Front casing part 2 for example is pulled in the automatic injector with respect to rear casing part 1 when on the injection position on the skin that places patient.Release member 20 is in abutting connection with front casing part 2 and therewith shifted onto the centre position with respect to rear casing part 3.Lock arm 15 slides and the sleeve pipe that is released part 20 is all the time further shifted onto in the recess on the actuator 12, so that they prevent that described actuator 12 from moving forward along the telescopic inner surface of release member 20.When with automatic injector when injection position is removed, volute spring 23 pushes back into latched position with release member 20.
Fig. 7 and 8 expressions are in the release member 20 of off-position.When release member 20 mediated, triggering part 18 can interact with release member 20.When operation triggered part 18, inclined surface 22 moved towards the projection 21 of release member 20.Projection 21 moves so that it drops on the inclined surface 22 and owing to further promote to trigger part 18 it is slided along inclined surface, so because angled geometry, release member 20 is spurred or is promoted along the direction that triggers part 18, till release member 20 is in the off-position.In the off-position, move so that its position is relative with lock arm 15 in the telescopic zone with wide cross-sectional of release member 20, make lock arm 15 radially outward shift out the recess 14 of actuator 12 owing to the bias voltage forward of recess 14, and discharge actuator 12.Actuator now can to the container 3 of active substance and entry needle 5 works and with them outside the front end that is extrapolated to housing parts 1 and 2, cause the injection of injection position.
In the present embodiment, triggering can only be pushed to get back in the rear sleeve 1 and depress simultaneously under the situation that triggers button 18 and take place in anterior cannula 2.
Figure 11 and 12a represent another embodiment of the automatic injector that the present invention proposes to 12c.
Among Figure 11 longitudinally the automatic injector shown in the section be designed to only be used for disposable use, it has the shell that comprises rear casing part 1 and front casing part 2, and the active force that rear casing part 1 and front casing part 2 can overcome spring 109 is moved toward each other from the position shown in Figure 11.One container 3 that is filled with active substance is received within the interior tubular quill housing 110 of automatic injector.At its front end, the active force that container 3 supports entry needles 5 and can pass through driving spring 107 in shell with tubular quill housing 110 axial displacements, so that entry needle 5 is expelled in patient's the skin.Entry needle 5 is dispensable for the present invention, and trigger mechanism described herein also can use with the automatic injector of needleless in principle.The member that drives forwards that comprises a rod actuator 12 is bonded in the container 3 by its front end towards entry needle 5, is driving forwards under member and the situation that plunger 4 links to each other, and its purposes is that dispensing is contained in the active substance in the container 3.Between the two ends of actuator 12, actuator 12 links to each other with transfer part 114, and the active force of driving spring 107 is passed to actuator 12 by transfer part 114.In its rear end away from entry needle 5, actuator 12 has cannelure 115, will be described below its purposes.
Automatic injector is expressed as the state that is in anxiety and prepares to use in Figure 11.The active force of compressed driving spring 107 is along towards the direction of container 3 bias voltage forward, and actuator 12 is engaged with release member 20 lockings in the cannelure 115 in its back-end.Release member 20 is located on the holding plates 130 and preferably to overcome the active force of a spring transversely mobile with the longitudinal axis of automatic injector, although not shown this spring.Therefore, the hole 129 passed on this holding plate 130, the rear end of actuator 12 stretches out.Provide with the form of lid and to trigger part 18, it is fitted on the rear end of automatic injector and the active force that preferably can overcome a spring activates along the axial direction that triggers part 18 and triggers part 18, although not shown this spring.As being clearly shown that among Figure 11, when the operating position shown in automatic injector is in, can not operating and trigger part 18, because it rests against on the flat surfaces 138 of release member 20.
In order to use automatic injector, at first must take off keep entry needle 5 aseptic protect pin medicated cap 132.Catch the rear casing part 1 of automatic injector then, place automatic injector, make front casing part 2 be located on patients' the skin and promoted a little, so the active force that front casing part 2 overcomes spring 109 advances with respect to rear casing part 1.When this happens, the tongue 119 that is formed on the front casing part 2 moves the inclined surface 122 that abuts release member 20, and makes the longitudinal direction of release member and automatic injector transversely move to the centre position.The distance that release member 20 is passed through is not enough to discharge actuator 12.Yet the edge 139 on the release member 20 moves to and is located in the zone of triggering the inclined surface 140 on the part 18, triggers part 18 so can activate along the axial direction of automatic injector now.Because inclined surface 140 contacts with edge 139, release member is moved further, and till it arrived its off-position, in the off-position, it discharged actuator 12, triggers injection.
Figure 12 a represents along the cross section of the line II-II shown in Figure 11 to 12c how expression release member 20 works.Figure 12 a represents to be in the release member 20 of the position identical with the position shown in Figure 11,, is in latched position that is.Hole 121 is located on the release member 20, and it has the shape of keyhole.In the latched position shown in Figure 12 a, the narrower part in hole 121 is bonded in the cannelure 115 of actuator 12, therefore keeps actuator 12 locked.Figure 12 b represents the centre position, and wherein tongue 119 has been shifted release member 20 onto its middle position.Axially be arranged on transition part place between narrow of hole 121 on the release member and the wide portion now in abutting connection with the head 141 of the actuator of cannelure 115, its result, actuator 12 still keeps being locked in it by the position of spring 107 bias voltages.At last, Figure 12 c represents the off-position of release member 20.The wider part in hole 121 has been pulled in the zone of cannelure 115, is triggered so head 141 can enter the wider part and the injection in hole 121 now.
Above-mentioned type with the embodiment of the invention shown in the figure is based on the translational motion of release member 20.In another kind of embodiment, though not shown, release member 20 can move in rotary manner.In this class embodiment, tongue 119 is made the oblique angle in the end that it points to release member 20, so when housing parts 1,2 was relative to each other mobile, tongue 119 rotated the longitudinal axis of release member 20 relative automatic injectors.In this case, the inclined surface 140 that triggers part 18 is not as shown in Figure 11 radial oriented, but orientation along the circumferential direction.In the present embodiment, release member also has three positions and moves to the centre position and move to the off-position by triggering part 18 from middle position from latched position by tongue 119.The head 141 of hole in the release member in the present embodiment and actuator 12 is non-circular shape.In latched position with in the centre position, head does not pass the hole and cooperates, yet it passes the hole cooperation in the off-position.
Therefore, because when pushing to housing parts each other, release member can move to the centre position from its latched position, it is locked that it keeps actuator in the centre position, can make release member shift out the centre position with the triggering part and enter the off-position, so realized purpose of the present invention.
In view of the motion of housing parts and the actuating that triggers part all can not cause injection to be triggered alone, so system is preventing that aspect the casual triggering be ultra-safe.In addition, this solution has been guaranteed automatic injector to be placed on patient's the skin before activating the triggering part.
The detail of Reference numeral
1. nearside housing parts;
2. distally housing parts;
2a. needle guard;
3. reservoir;
4. actuator, plunger;
5. entry needle;
6. reservoir retainer;
7. back-moving spring;
8. supporting member;
9.-
10. dispensing driver, the dispensing spring;
11. the dispensing member, plunger rod;
12. drive forwards member;
13. injection drive, the injection spring;
14. excision portion, recess;
15. the injection latching member, moving engaging of wink device;
16. dispensing latching member;
17. excision portion, recess;
18. triggering part;
19. switching cam;
20. bridgeware;
21. cam;
22. switching cam;
23. spring;
24. recess;
25. injection latching member;
L. longitudinal axis;
V. drive forwards direction;
107. driving spring;
108. keeper;
109. spring;
110. tubular quill housing;
114. transfer part;
115. cannelure;
116. cannelure;
117. spring;
118. spring;
119.122 on tongue;
120.18 in the hole;
121.20 in the hole;
122.20 on inclined surface;
123. spring;
124. inner sleeve;
125. excision portion;
126. recess;
127.18 arm;
128. maintenance lower limb;
129. hole;
130. holding plate;
131. maintenance projection;
132. protect the pin medicated cap;
133. protective cover;
134. stop pin;
135. body;
136. web;
137.122 the sleeve-shaped end;
138.20 on flat surfaces;
139.20 on the edge;
140.18 on inclined surface;
141.12 on head;
142. pipe;
143. shoulder;
144. slide lock;
Claims (28)
1. automatic injector, it has elongate housing (1), is provided with the container (3) that is used for the splendid attire active substance in the described elongate housing, described shell (1) comprises at least two housing parts (2 that can relative to each other move, 3), wherein, described automatic injector also comprises:
Can be by the active force of at least one spring (7) along the injection direction actuator of bias voltage (12) forward, can move to the release member (20) of an off-position from a latched position, in described latched position, described actuator (12) is locked in biased position forward, and in described off-position, described actuator (12) is disengaged locking and triggers part (18);
It is characterized in that, can be by described housing parts (2,3) relative motion makes described release member (20) move to the centre position from its latched position, in described centre position, described actuator (12) is locked, enters described off-position and described triggering part (18) can make described release member (20) shift out described centre position.
2. automatic injector as claimed in claim 1, it is characterized in that, move in the plane that described triggering part (18) can transversely be provided with at the longitudinal direction with described automatic injector, and described release member (20) can move along the longitudinal direction of described automatic injector.
3. automatic injector as claimed in claim 1 or 2 is characterized in that, described triggering part (18) has the guiding mechanism that is used at the process described release member of guiding (20) that moves to described off-position from described centre position.
4. automatic injector as claimed in claim 1 is characterized in that, described release member (20) and locking mechanism (15) collaborative work are so that be locked in described biased position forward with described actuator (12).
5. automatic injector as claimed in claim 4 is characterized in that, in order to unlock, moves in the plane that described locking mechanism (15) can transversely be provided with at the longitudinal direction with described automatic injector.
6. automatic injector as claimed in claim 1, it is characterized in that, described triggering part (18) can move along the longitudinal direction of described automatic injector, and moves in described release member (20) plane that can transversely be provided with at the longitudinal direction with described automatic injector.
7. automatic injector as claimed in claim 6 is characterized in that, in its latched position, described release member (20) prevents that described triggering part (18) from moving.
8. automatic injector as claimed in claim 1, it is characterized in that, described release member (20) has the hole (121) of keyhole shape and be provided with cannelure (15) on described actuator, when described release member (20) when being in described latched position, the elongated portion of the hole of described keyhole shape (121) is bonded in the described cannelure.
9. automatic injector as claimed in claim 1 is characterized in that, guides described release member (20) so that it realizes rotatablely moving from described latched position to described off-position.
10. automatic injector as claimed in claim 9, it is characterized in that, described release member (20) has non-circular hole (21), and is provided with the head with non-circular cross sections on described actuator, and described head only passes described hole when described release member is in described off-position.
11. the injection device that can trigger actuating, it comprises:
A) housing parts (1);
B) be used for the reservoir (3) of injectable product;
C) have the entry needle (5) of needle point at far-end;
D) needle guard (2a), its can with respect to described housing parts (1) and described entry needle (5) from the protective position displacement till surpassing described needle point, and be displaced to retracted position backward along proximal direction, in described protective position, described needle guard (2a) surrounds described entry needle (5);
E) be used to the driving mechanism injected, its be locked in releasable maintenance engage in to prevent actuation movement;
F) bridgeware (20), itself and described needle guard (2a) are coupled, so that described needle guard (2a) makes described bridgeware (20) move to coupling position from latched position along moving of proximal direction; With
G) be used to trigger the actuatable triggering part (18) of described driving mechanism, it is coupled with described bridgeware (20) when activating when presenting coupling position when described bridgeware (20), and it makes described bridgeware (20) shift out described coupling position to enter the off-position,
H) wherein, the maintenance of described driving mechanism engages and is not released, till described bridgeware (20) is in described off-position.
12. injection device as claimed in claim 11 is characterized in that, described bridgeware (20) leaves described latched position and enters the motion of described off-position along identical direction generation.
13., it is characterized in that described bridgeware (20) shifts out described latched position along proximal direction and enters described off-position as claim 11 or 12 described injection devices.
14. injection device as claimed in claim 11 is characterized in that, in axial direction linearly described bridgeware (20) is directed to described off-position from described latched position.
15. injection device as claimed in claim 11 is characterized in that, described triggering part (18) is mounted to, and makes it can move to the laterally displacement of direction of described off-position with respect to described bridgeware (20).
16., it is characterized in that described triggering part (18) makes described bridgeware (20) shift out described coupling position by upward sliding at described bridgeware (20) and enters described off-position as claim 11 or 15 described injection devices.
17. injection device as claimed in claim 11, it is characterized in that, in described triggering part (18) and the described bridgeware (20) at least one is provided with switching cam (19), at the coupling engagement state, in described triggering part and the described bridgeware one slides on another by means of described switching cam (19), and described switching cam (19) shifts out described coupling position with respect to described bridgeware (20) and enters the direction of described off-position and move to the direction of described coupling in the engaging angle that tilts with respect to described triggering part (18) when activating.
18. injection device as claimed in claim 11 is characterized in that, described driving mechanism and described housing parts (1) are by means of at least one latching member (15; 25) be in keep to engage in and described bridgeware (20) overcome elastic acting force with described latching member (15; 25) remain in the described maintenance joint.
19. injection device as claimed in claim 11 is characterized in that, described bridgeware (20) overcomes described elastic acting force with described latching member (15; 25) push in the described maintenance joint.
20. as claim 18 or 19 described injection devices, it is characterized in that, when described bridgeware (20) when being in described off-position, described latching member (15; 25) arrived such degree, promptly described latching member (15 by described bridgeware (20) pressure relief at least; 25) can shift out described maintenance engages.
21., it is characterized in that described bridgeware (20) has at least one recess (24) as claim 18 or 19 described injection devices, when described bridgeware (20) when being in described off-position, described latching member (15; 25) be fastened in the female portion, engage thereby discharge described maintenance.
22. injection device as claimed in claim 21 is characterized in that, described latching member (15; 25) transversely shifting out described maintenance with the longitudinal direction of described entry needle (5) engages.
23. as claim 18 or 19 described injection devices, it is characterized in that, described bridgeware (20) have cannula portion and by means of the inner surface of described cannula portion with described latching member (15; 25) push described maintenance engage in and on described inner surface, be provided with recess (24), described latching member (15; 25) breaking away from described maintenance joint fast enters in the female portion.
24. injection device as claimed in claim 11 is characterized in that, at described needle guard (2a) when moving to described retracted position, described needle guard (2a) leaves described latched position and enters described coupling position by itself driving described bridgeware (20).
25. injection device as claimed in claim 11 is characterized in that, described needle guard (2a) is because pressure contact and by itself driving described bridgeware (20).
26. injection device as claimed in claim 23 is characterized in that, described bridgeware (20) is discharged from described needle guard (2a) when described coupling position moves to described off-position at it.
27. injection device as claimed in claim 18, it is characterized in that, described driving mechanism comprises injection drive (13) and drives forwards member (12), the described member that drives forwards is mounted to, make its can along drive forwards direction (V) with respect to described housing parts (1) towards the far-end displacement, and the driving force that overcomes described injection drive (13) locks it in the described maintenance joint, with when the described maintenance of release engages, described injection drive (13) and the described member (12) that drives forwards drive described entry needle (5) along the described direction (V) that drives forwards with respect to described needle guard (2a).
28. injection device as claimed in claim 18, it is characterized in that, described driving mechanism has actuator (4), dispensing member (11) that the product in the reservoir (3) is worked and the dispensing driver (10) that drives described actuator (4) by dispensing member (11), hold described dispensing member (11) and guide it with the wherein said member (12) that drives forwards, and described dispensing driver (10) is described injection drive or another driver along the described direction (V) that drives forwards.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH21892003 | 2003-12-18 | ||
| CH2189/03 | 2003-12-18 | ||
| DE20319648.1 | 2003-12-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1917912A CN1917912A (en) | 2007-02-21 |
| CN100574821C true CN100574821C (en) | 2009-12-30 |
Family
ID=34955906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200480041878A Expired - Fee Related CN100574821C (en) | 2003-12-18 | 2004-11-29 | Releasable injection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100574821C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2219710B2 (en) | 2007-11-12 | 2020-08-05 | Medicom Innovation Partner a/s | Auto injector with automatic needle retraction |
| SG11201502146QA (en) * | 2012-10-19 | 2015-05-28 | Amgen Inc | Improved autoinjector |
| EP3199190B1 (en) * | 2013-09-30 | 2019-12-04 | Medimop Medical Projects Ltd. | Stabilized pen injector |
| US10864326B2 (en) * | 2016-03-16 | 2020-12-15 | Eli Lilly And Company | Medication injection device with automatic needle retraction following injection |
| CN110869072B (en) | 2017-05-30 | 2021-12-10 | 西部制药服务有限公司(以色列) | Modular drive mechanism for a wearable injector |
| CH712459A2 (en) * | 2017-08-31 | 2017-11-15 | Tecpharma Licensing Ag | Drive device for injection devices. |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3563098A (en) * | 1968-06-28 | 1971-02-16 | Rex Chainbelt Inc | Automatic quick release mechanism |
| US5137516A (en) * | 1989-11-28 | 1992-08-11 | Glaxo Group Limited | Triggered application device for medicament to be more descriptive of the invention |
| US5599309A (en) * | 1993-03-24 | 1997-02-04 | Owen Mumford Limited | Injection devices |
| US5681291A (en) * | 1992-11-19 | 1997-10-28 | Tebro S.A. | Disposable auto-injector for prefilled syringes |
| US5843036A (en) * | 1996-08-23 | 1998-12-01 | Becton Dickinson And Company | Non-dosing cartridge for an injection device |
| US6270479B1 (en) * | 1998-10-26 | 2001-08-07 | Pharmacia Ab | Autoinjector |
| WO2002047746A1 (en) * | 2000-12-14 | 2002-06-20 | Shl Medical Ab | Auto-injector |
-
2004
- 2004-11-29 CN CN200480041878A patent/CN100574821C/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3563098A (en) * | 1968-06-28 | 1971-02-16 | Rex Chainbelt Inc | Automatic quick release mechanism |
| US5137516A (en) * | 1989-11-28 | 1992-08-11 | Glaxo Group Limited | Triggered application device for medicament to be more descriptive of the invention |
| US5681291A (en) * | 1992-11-19 | 1997-10-28 | Tebro S.A. | Disposable auto-injector for prefilled syringes |
| US5599309A (en) * | 1993-03-24 | 1997-02-04 | Owen Mumford Limited | Injection devices |
| US5843036A (en) * | 1996-08-23 | 1998-12-01 | Becton Dickinson And Company | Non-dosing cartridge for an injection device |
| US6270479B1 (en) * | 1998-10-26 | 2001-08-07 | Pharmacia Ab | Autoinjector |
| WO2002047746A1 (en) * | 2000-12-14 | 2002-06-20 | Shl Medical Ab | Auto-injector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1917912A (en) | 2007-02-21 |
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Granted publication date: 20091230 Termination date: 20101129 |