CN214860059U

CN214860059U - Trigger device suitable for automatic injector

Info

Publication number: CN214860059U
Application number: CN202121004274.XU
Authority: CN
Inventors: 熊长艳; 何四现; 杜嘉文; 易林川
Original assignee: Suzhou Jiashu Medical Technology Co ltd
Current assignee: Suzhou Jiashu Medical Technology Co ltd
Priority date: 2021-05-12
Filing date: 2021-05-12
Publication date: 2021-11-26
Anticipated expiration: 2031-05-12

Abstract

The utility model relates to a trigger device suitable for automatic injection ware, including the power lid subassembly, be provided with the locating lever on the power lid subassembly, the locating lever is worn to establish behind the power card and is linked to each other with the power main part, the power card sets up in the power main part, the front end cover of power main part is equipped with sliding block set spare, and the centre gripping has a secondary spring between the front end of power main part and the sliding block set spare, sliding block set spare's front end is provided with main spring, sliding block set spare is passed to main spring's tail end and is contacted with the locating lever, sliding block set spare's inner wall is provided with the stuck point, main spring's head end is provided with the push rod. Therefore, the power card can meet the limit guide of the sliding block assembly and is matched with the elastic force of the auxiliary spring to perform trigger control. The power card can realize effectual spacing to sliding block set spare after triggering the completion, avoids it to be promoted once more, realizes that it is spacing to defeat, can not cause the secondary to trigger. The automatic injector has simple integral structure, can meet the triggering and using requirements of various automatic injectors, and has better compatibility.

Description

Trigger device suitable for automatic injector

Technical Field

The utility model relates to a trigger device especially relates to a trigger device suitable for autoinjector.

Background

The existing disposable automatic injector has very complex design principle, leads to a plurality of parts which are generally more than 15, so the reliability is not high, the assembly difficulty is large, and the final product cost is too high.

CN110237366A discloses a medical injection device, which comprises an outer barrel and a pen cap, one end of the outer barrel is provided with a detachable medicine bin, a replaceable standard card type medicine bottle is arranged in the medicine bin, one end of the inner part of the outer barrel close to the medicine bin is provided with a fixed sleeve, the inner axial movement of the fixed sleeve is provided with a push rod seat, the inner part of the push rod seat is provided with a transmission ring which can be meshed with the end part of a transmission rod, the outer side of the transmission rod is sleeved with a ratchet ring which can axially slide, one end face of the ratchet ring is in one-way meshing with the inner part of the outer barrel, the other end of the ratchet ring is axially provided with a first spring, one end of the push rod seat is axially provided with a push rod seat spring which is propped against the outer barrel, and one end of a push rod penetrates through the push rod seat to stretch into the standard card type medicine bottle to be connected with a push block.

CN109999272A discloses a disposable adjustable injection device for insulin injection, which comprises a protective cover, a disposable needle, a pen core sleeve, a main body shell, a pen core and an adjusting component, one end of the main body shell is provided with a second boss, the outside of the second boss is provided with a refill sleeve, one end of the pencil lead sleeve is provided with a thread groove, the external thread of the second boss is in threaded connection with the thread groove, the other end of the refill sleeve is provided with a first boss, the outside of the first boss is connected with a disposable needle head through threads, a steel needle is inserted in the disposable needle head, a pen core is arranged in the pen core sleeve, a protective cover is sleeved outside the pen core sleeve, the other end of main body cover is provided with adjusting part, main body cover's internally mounted has fixed sleeve, fixed sleeve's one end outside protrusion has flange portion.

CN102264417A discloses an injection device comprising: a long housing; a container carrier having a medicament container to which a needle is mounted; a puncture device comprising a separation sleeve, a preloaded puncture spring device and a puncture holding device, wherein said preloaded puncture spring device is capable of acting on said separation sleeve and thereby on said container carrier for a sliding movement of said container and needle, and said puncture holding device is capable of holding said puncture spring device in a loaded state; injection means comprising a plunger rod, pre-loaded injection spring means and injection retaining means, wherein the plunger rod is arranged to act on a stopper in the medicament container, the pre-loaded injection spring means is adapted to act on the plunger rod such that the stopper is displaced within the container, and the injection retaining means is adapted to retain the injection spring means in a loaded state; retraction means comprising a preloaded retraction spring and retraction holding means, wherein the preloaded retraction spring is arranged to act on the separation sleeve and thereby on the container carrier, and the retraction holding means is capable of holding the retraction spring in a loaded state; a puncture sequence initiating means capable of acting on a puncture trigger means arranged on said separation cannula for disconnecting said puncture holding means; an injection trigger means provided on said separation sleeve and capable of disconnecting said injection holding means to initiate an injection sequence when the separation sleeve and the plunger rod are moved to a specific position; and retraction triggering means arranged on said separation sleeve and capable of disconnecting said retraction holding means for initiating needle retraction when said plunger rod has been moved to a certain position; characterized in that the device further comprises damping means comprising a compartment containing a volume of a highly viscous liquid and being partly defined by the outer surface of the plunger rod and the inner surface of the cap, wherein the compartment is arranged with a channel through which the liquid is forced only upon initiation of the injection sequence, such that the volume within the compartment decreases with movement of the plunger rod in the container during the entire injection sequence and thereby damping shear forces are generated.

Meanwhile, after the existing automatic injector is triggered, secondary false triggering can occur due to the lack of necessary limiting, so that the use injury is caused. Moreover, the structure is too complex, the fault tolerance rate of assembly is low, the whole body is easily scrapped once assembly errors occur, and the implementation cost is high.

In view of the above-mentioned drawbacks, the present designer is actively making research and innovation to create a trigger device suitable for an automatic injector, so that the trigger device has industrial value.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the present invention provides a trigger device for an automatic injector.

The utility model discloses a trigger device suitable for automatic syringe, including the power cap subassembly, wherein: the power cover component is provided with a positioning rod, the positioning rod is connected with the power main body after penetrating through the power card, the power card is arranged in the power main body, the front end of the power main body is sleeved with a sliding block component, an auxiliary spring is clamped between the front end of the power main body and the sliding block component, the front end of the sliding block component is provided with a main spring, the tail end of the main spring penetrates through the sliding block component to be in contact with the positioning rod, the inner wall of the sliding block component is provided with a clamping point, and the head end of the main spring is provided with a push rod.

Further, foretell trigger device suitable for autoinjector, wherein, the tail end of power card is provided with the gib, gib and auxiliary spring contact, the front end of power card is provided with the Y shape bifurcation, the Y shape bifurcated front end outside is provided with outer trip, Y shape bifurcated front end inboard is provided with interior trip, the push rod is including the pole body, be provided with the draw-in groove on the pole body, when being in the state before triggering, in the interior trip embedding draw-in groove, when being in the state after triggering, the trip point contacts with outer trip, and it is spacing to defeat the slider subassembly realization.

Furthermore, the above trigger device for an automatic injector, wherein the power cap assembly includes a power cap body, a positioning rod is disposed at the center of the power cap body, a plurality of expansion blocks are disposed at the outer side of the power cap body, and a storage groove is disposed on the power cap body.

Furthermore, the above trigger device for an automatic injector, wherein the power body is of a cone barrel structure, the tail of the power body is provided with a abdicating notch, the power body is provided with a slide block limiting block, the front end of the power body is provided with a guide groove, and the outer side of the tail of the power body is provided with a power cover positioning block.

Still further, the trigger device suitable for the automatic injector, wherein the slider component comprises a barrel-shaped slider body, the front end of the slider body is provided with the propelling pieces distributed in pairs, the inner wall of the slider body is provided with the clamping points, and the outer wall of the slider body is distributed with a plurality of guide strips.

Borrow by above-mentioned scheme, the utility model discloses at least, have following advantage:

1. the power card can satisfy the spacing guide of slider component, and the elasticity of cooperation secondary spring triggers control.

2. The power card can realize effectual spacing to sliding block set spare after triggering the completion, avoids it to be promoted once more, realizes that it is spacing to defeat, can not cause the secondary to trigger.

3. The automatic injector has simple integral structure, can meet the triggering and using requirements of various automatic injectors, and has better compatibility.

4. The modular configuration is adopted, so that the assembly and the use are easy, the fault tolerance rate of the installation is high, the replacement can be rapidly carried out even if installation errors occur, and the assembly cost is reduced.

The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.

Drawings

Fig. 1 is a schematic view of the overall structure of the trigger device suitable for use in an automatic injector.

FIG. 2 is a schematic structural view of a power cap assembly.

Fig. 3 is a schematic structural diagram of the power card.

Fig. 4 is a schematic structural view of the power body.

Fig. 5 is a schematic structural view of the slider assembly.

Fig. 6 is a schematic structural view of the push rod.

Fig. 7 is a schematic view of the overall structure of the present invention before triggering.

Fig. 8 is a schematic view of the cross-sectional configuration of the present invention prior to triggering.

Fig. 9 is a schematic view of the overall structure of the present invention after triggering.

FIG. 10 is a schematic view of a structure of a stuck point in a slider assembly.

The meanings of the reference symbols in the drawings are as follows.

1 power cover assembly 2 locating lever

3 power card 4 power main body

5 sliding block assembly 6 auxiliary spring

7 main spring 8 push rod

9 card strip 10Y-shaped branch

11 outer hook 12 inner hook

13 clamping groove 14 expansion block

15 accommodating groove 16 abdicating and slotting

17 slide block limiting block 18 guide groove

19 power cover positioning block 20 pushing sheet

21 guide strip 22 stuck point

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

The trigger device suitable for an auto-injector as shown in fig. 1 to 9 comprises a power cap assembly 1, which is distinguished in that: the power cover assembly 1 is provided with a positioning rod 2, so that the subsequent preset positioning of the main spring 7 is conveniently realized. During the assembly, locating lever 2 wears to establish and links to each other with power main part 4 behind the power card 3, and power card 3 sets up in power main part 4. Meanwhile, the front end of the power body 4 is sleeved with a slider assembly 5, and an auxiliary spring 6 is clamped between the front end of the power body 4 and the slider assembly 5. In order to realize necessary injection driving, a main spring 7 is provided at the tip of the slider assembly 5. Specifically, the rear end of the main spring 7 is in contact with the positioning rod 2 through the slider assembly 5. And, the inner wall of the slider assembly 5 is provided with a click point 22 in view of the subsequent positioning needs of the slider assembly 5. Further, a push rod 8 is provided at the head end of the main spring 7 to smoothly inject the liquid medicine.

Combine the utility model discloses an embodiment of preferred sees, spacing in order to satisfy the afterbody of auxiliary spring 6, can be satisfied follow-up smooth release needs by correct compression during its use of being convenient for, and the tail end of power card 3 is provided with card strip 9, card strip 9 and auxiliary spring 6 contact. In order to achieve smooth bearing, the clip strip 9 may be provided with a groove for receiving the secondary spring 6. The front end of the power card 3 is provided with a Y-shaped branch 10. In consideration of limiting and stopping frustration by matching with the slider assembly 5 during subsequent use, the outer side of the front end of the Y-shaped fork 10 is provided with an outer hook 11, and the inner side of the front end of the Y-shaped fork 10 is provided with an inner hook 12. And simultaneously, the utility model discloses a push rod 8 including the pole body, be provided with draw-in groove 13 on the pole body. Thus, in the pre-trigger state, the inner hook 12 is inserted into the slot 13. During implementation, when the slider assembly is in the post-trigger state, the locking point 22 contacts with the outer hook 11, so as to achieve frustration limiting on the slider assembly 5.

Further, the power cover assembly 1 comprises a power cover body, a positioning rod 2 is arranged at the center of the power cover body, a plurality of expansion blocks 14 are arranged on the outer side of the power cover body, and a containing groove 15 is formed in the power cover body. Thus, after the combination is finished, the expansion block 14 is combined with the reserved groove preset on the power body 4, and the tight combination is ensured. Meanwhile, the power cover can be combined with the power cover positioning block 19 of the power body 4 by the existence of the accommodating groove 15, so that stable combination can be better met.

Combine practical implementation to see, the utility model discloses a power main part 4 be awl bucket structure, the afterbody of power main part 4 has been seted up and has been abducted fluting 16. Thus, the clamping strip 9 can be embedded into the abdicating slot 16 without causing improper combination interference. Meanwhile, in consideration of final limit after the retraction of the subsequent slide block assembly 5, a slide block limit block 17 is arranged on the power main body 4. Furthermore, the front end of the power body 4 is provided with a guide groove 18. In this way, the guide bars 21 of the slider assembly 5 can be inserted into the guide grooves 18 during use, and proper motion guidance can be achieved, so that unnecessary vibration of the slider assembly 5 during motion can be avoided. Furthermore, in order to realize effective limit combination with the power cover assembly 1, a power cover positioning block 19 is arranged at the outer side of the tail part of the power body 4.

Still further, the utility model discloses a sliding block set 5 including the slider body of tubbiness. Specifically, the front end of the slider body is provided with pushing pieces 20 distributed in pairs, and the inner wall of the slider body is provided with a clamping point 22. Therefore, the stable combination of the slide block body and the power card 3 after the slide block body retracts can be met. Meanwhile, a plurality of guide strips 21 are distributed on the outer wall of the sliding block body. After the assembly is completed, the guide strip 21 is embedded into the guide groove 18 at the front end of the power body 4, so that effective limiting and guiding are realized.

The working principle of the utility model is as follows:

when the automatic injector starts to operate, the slider assembly 5 is pushed. At this time, the sub-spring 6 is in a compressed state, and the elastic force of the main spring 7 is released. Thereby, the push rod 8 is pushed to move outwards until the push rod 8 is completely separated from the outer clamping hooks 11 distributed on the power card 3. At the same time, the repulsive force of the sub spring 6 pushes the power card 3 backward. And randomly, the power card 3 is made to impact the power cover assembly 1 to generate sound, and effective sound effect prompt of injection completion is carried out. Then, the pushing force of the slider assembly 5 is released, and the elastic force generated by the secondary spring 6 pushes the slider assembly 5 to move continuously. However, since the locking point 22 of the slider assembly 5 is locked on the outer hook 11 of the Y-shaped fork 10, the slider assembly 5 cannot be pushed as in the initial state any more, and thus the frustration effect is achieved.

Through foretell expression of characters and combination of the attached drawing can be seen, adopt the utility model discloses afterwards, possess following advantage:

Furthermore, the indication directions or positional relationships described in the present invention are directions or positional relationships based on the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the indicated device or structure must have a specific direction or operate in a specific directional configuration, and therefore, should not be construed as limiting the present invention.

The terms "primary" and "secondary" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "primary" or "secondary" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Also, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "connected" and "disposed" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other or mutually interacted. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art. And it may be directly on the other component or indirectly on the other component. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or component so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. A trigger device adapted for use with an automatic injector, comprising a power cap assembly, characterized in that: the power cover component is provided with a positioning rod, the positioning rod is connected with the power main body after penetrating through the power card, the power card is arranged in the power main body, the front end of the power main body is sleeved with a sliding block component, an auxiliary spring is clamped between the front end of the power main body and the sliding block component, the front end of the sliding block component is provided with a main spring, the tail end of the main spring penetrates through the sliding block component to be in contact with the positioning rod, the inner wall of the sliding block component is provided with a clamping point, and the head end of the main spring is provided with a push rod.

2. A trigger device adapted for use with an autoinjector according to claim 1, wherein: the tail end of power card is provided with the gib, gib and auxiliary spring contact, the front end of power card is provided with Y shape branching, the Y shape branching front end outside is provided with outer trip, Y shape branching front end inboard is provided with interior trip, the push rod is including the pole body, be provided with the draw-in groove on the pole body, when being in the state before triggering, in interior trip embedding draw-in groove, when being in the state after triggering, the trip point contacts with outer trip, and it is spacing to frustrate to realize slider component.

3. A trigger device adapted for use with an autoinjector according to claim 1, wherein: the power cover assembly comprises a power cover body, a positioning rod is arranged at the circle center of the power cover body, a plurality of expansion blocks are arranged on the outer side of the power cover body, and a containing groove is formed in the power cover body.

4. A trigger device adapted for use with an autoinjector according to claim 1, wherein: the power main part is the awl bucket structure, the afterbody of power main part has been seted up and has been stepped down the fluting, the last slider stopper that is provided with of power main part, the front end of power main part is provided with the guiding groove, the afterbody outside of power main part is provided with power lid locating piece.

5. A trigger device adapted for use with an autoinjector according to claim 1, wherein: the slider component comprises a barrel-shaped slider body, the front end of the slider body is provided with propelling pieces which are distributed in pairs, the inner wall of the slider body is provided with clamping points, and the outer wall of the slider body is distributed with a plurality of guide strips.