CN214860063U - Internal anti-scratching structure suitable for automatic injector - Google Patents
Internal anti-scratching structure suitable for automatic injector Download PDFInfo
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- CN214860063U CN214860063U CN202121505281.8U CN202121505281U CN214860063U CN 214860063 U CN214860063 U CN 214860063U CN 202121505281 U CN202121505281 U CN 202121505281U CN 214860063 U CN214860063 U CN 214860063U
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Abstract
The utility model relates to an inside anti-scratch structure suitable for automatic injector, including bearing the main part, bear the main part overcoat and be equipped with the secondary spring, bear and be provided with power card linking draw-in groove in the main part, be provided with a plurality of support structures in bearing the main part, the one end and the support structure contact of secondary spring, support the structure including strip muscle body, strip muscle body is including strip guide structure, and the one end extension of strip guide structure has protruding contact piece. Therefore, due to the existence of the supporting structure, when the auxiliary spring is assembled in the pen feeding shell to which the automatic injector belongs, the inner wall of the pen feeding shell cannot cause improper compression or displacement of the auxiliary spring when the auxiliary spring is scratched, the triggering failure state of the associated assembly in the auxiliary spring is avoided, and the auxiliary spring cannot deflect. The strip-shaped guide structure and the raised contact piece structure are adopted, so that the normal compression and propulsion of the auxiliary spring are not influenced.
Description
Technical Field
The utility model relates to a structure for self-administration system especially relates to an inside anti-scratch structure suitable for automatic injector.
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.
However, prior art autoinjectors, which have secondary springs that, when used, are susceptible to unwanted axial rotation during compression. Therefore, a force different from the firing injection direction is generated, and smooth firing is affected. If the secondary spring is restrained as necessary, too many auxiliary structures are often required to be added, and the secondary spring is also subjected to other additional external stress, so that the triggering force application is too large, and improper impact of the PFS assembly is easily caused.
In view of the above-mentioned drawbacks, the present inventors have made active research and innovation to create an internal anti-scratch structure for an automatic injector, which has industrial utility value.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model aims at providing an inside anti-scratch structure suitable for automatic injector.
The utility model discloses an inside anti-scratch structure suitable for automatic syringe, including bearing the main part, it is equipped with the secondary spring to bear the main part overcoat, it links up the draw-in groove to bear to be provided with the power card in the main part, wherein: the bearing main body is provided with a plurality of supporting structures, one end of the auxiliary spring is in contact with the supporting structures, the supporting structures comprise strip-shaped rib bodies, the strip-shaped rib bodies comprise strip-shaped guiding structures, and protruding contact pieces extend from one ends of the strip-shaped guiding structures.
Further, the above-mentioned internal anti-scratch structure suitable for an auto-injector, wherein a transition slope is distributed between the strip-shaped guide structure and the protruding contact piece, and the angle of the transition slope is 100 to 160 degrees.
Further, the above-mentioned internal anti-scratch structure for an auto-injector, wherein the angle of the transition slope is 120 degrees.
Further, the above-mentioned internal anti-scratch structure for an automatic injector, wherein the width of the strip-shaped guiding structure is 1 to 2 mm.
Further, the above internal anti-scratch structure for an automatic injector, wherein the height of the strip-shaped guiding structure is 0.3 to 1 mm.
Furthermore, the above-mentioned internal anti-scratching structure for an automatic injector is characterized in that the protruding contact piece is provided with a positioning groove, and one end of the secondary spring is in contact with the positioning groove.
Further, the above-mentioned internal anti-scratch structure for an auto-injector is provided, wherein the two support structures are arranged on the outer side wall of the carrying body in a mirror image manner.
Still further, the above-mentioned internal anti-scratch structure suitable for an automatic injector, wherein, the support structure has four, and the support structure is equidistantly distributed on the outer side wall of the bearing main body.
Borrow by above-mentioned scheme, the utility model discloses at least, have following advantage:
1. through the existence of the supporting structure, when the auxiliary spring is assembled in the pen feeding shell to which the automatic injector belongs, the inner wall of the pen feeding shell cannot cause improper compression or displacement of the auxiliary spring when the auxiliary spring is scratched, the triggering failure state of the associated assembly in the auxiliary spring is avoided, and the auxiliary spring is ensured not to deflect.
2. The supporting structure adopts a strip-shaped guiding structure and a raised contact piece structure, and the normal compression and propulsion of the auxiliary spring cannot be influenced.
3. The whole structure is simple, the traditional bearing main body can be matched for use only by being transformed and replaced, and the implementation cost is low.
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 structural view of a load bearing body.
Fig. 2 is a schematic view of the combination of the secondary spring and the support structure.
Fig. 3 is a schematic view of the assembly of the secondary spring with the upper pen shell.
The meanings of the reference symbols in the drawings are as follows.
1 carrying body 2 secondary spring
3 power card links up 4 strip guide structures in draw-in groove
5 raised contact piece 6 transition slope
7 Upper pen shell
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 inside anti-scratch structure suitable for automatic injector as shown in fig. 1 to 3, including bearing the main part 1, bear 1 overcoat of main part and be equipped with secondary spring 2, bear and be provided with power card linking draw-in groove 3 on the main part 1, its distinctive part lies in: in order to achieve an effective correction of the movement path of the spring during use, preventing unnecessary twisting or compression thereof, the carrier body 1 is provided with a number of support formations, with which one end of the secondary spring 2 is in contact. Particularly, when assembling 7 in the last shell that automatic injector belonged for secondary spring 2, the inner wall of going up shell 7 can not cause secondary spring 2's improper compression or displacement when scraping secondary spring 2, the utility model discloses a support structure including strip muscle body. The strip rib body comprises a strip guide structure 4, and one end of the strip guide structure 4 extends to form a convex contact piece 5. Thus, the contact area between the auxiliary spring 2 and the main spring can be increased, abnormal torsional stress is transmitted by means of the supporting structure, and the auxiliary spring 2 is prevented from being excessively acted. Meanwhile, as more parts of the secondary spring 2 are in contact with the supporting structure during use, the contact similar to interference fit can be generated, and the secondary spring 2 can be supported to carry out necessary auxiliary limiting even when the scraping with the inner wall of the upper pen shell 7 occurs. Of course, the existing contact friction force cannot limit the normal injection firing stress and cannot influence the normal force application firing.
In a preferred embodiment of the present invention, a transition slope 6 is distributed between the strip-shaped guiding structure 4 and the protruding contact piece 5. In this way, it is ensured that the secondary spring 2 can be smoothly contracted during use and can follow the guidance of the transition slope 6 during movement without local jamming. Meanwhile, the angle of the transition slope 6 is 100 to 160 degrees in consideration of implementation convenience. Of course, in view of the size of the carrier body 1 and the secondary spring 2 adopted by various conventional auto-injectors, the angle of the transition slope 6 is 120 degrees, which can meet the conventional use requirements. Of course, the actual angle of the transition ramp 6 may be adjusted in order to suit particular implementation needs, and is not limited to 100 to 160 degrees.
Further, in order to effectively bear the stress of the secondary spring 2 during use, the width of the strip-shaped guide structure 4 is 1 to 2 mm, and the height of the strip-shaped guide structure 4 is 0.3 to 1 mm. Thus, the conventional manufacturing materials are integrated, and the fracture or distortion cannot occur. Of course, in order to be able to carry out appropriate assistance to the one end of the secondary spring 2 for limitation, the utility model discloses can also set up the constant head tank on protruding contact piece 5, the one end of secondary spring 2 contacts with the constant head tank.
In connection with the practical implementation, in order to effectively carry and guide the rotational stress to which the secondary spring 2 is subjected, two support structures are adopted, which are distributed on the outer side wall of the bearing body 1 in a mirror image manner. Therefore, no matter the left half side or the right half side of the secondary spring 2 has the tendency of axial deflection, the deviation-rectifying limit can be realized through the corresponding support structure. Of course, to the implementation of comparatively optimizing, the utility model discloses can choose for use four supporting construction. In this way, one end of the secondary spring 2 can be guided by the uniform spacing of the four support structures during implementation.
The working principle of the utility model is as follows:
the auto-injector is in a fired state in conjunction with the user's depression. During this time, the power card begins to push the secondary spring 2 to compress. At this time, the auxiliary spring 2 can be guided to be smoothly compressed by the existence of the supporting structure, unnecessary axial rotation cannot occur during compression, blocking cannot occur, and smooth percussion is realized.
It should be noted that the present invention is only illustrated by an automatic injector, and can be applied to various self-administration systems at present, which is not described herein again.
Through foretell expression of characters and combination of the attached drawing can be seen, adopt the utility model discloses afterwards, possess following advantage:
1. when the auxiliary spring is assembled in the pen feeding shell to which the automatic injector belongs, the inner wall of the pen feeding shell cannot cause improper compression or displacement of the auxiliary spring when the auxiliary spring is scratched, the triggering failure state of the associated assembly in the auxiliary spring is avoided, and the auxiliary spring cannot deflect.
2. The supporting structure adopts a strip-shaped guiding structure and a raised contact piece structure, and the normal compression and propulsion of the auxiliary spring cannot be influenced.
3. The whole structure is simple, the traditional bearing main body can be matched for use only by being transformed and replaced, and the implementation cost is low.
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 (8)
1. Inside anti-scratch structure suitable for automatic injector, including bearing the main part, it is equipped with auxiliary spring to bear the main part overcoat, it links up draw-in groove, its characterized in that to be provided with the power card in the main part to bear: the bearing main body is provided with a plurality of supporting structures, one end of the auxiliary spring is in contact with the supporting structures, the supporting structures comprise strip-shaped rib bodies, the strip-shaped rib bodies comprise strip-shaped guiding structures, and protruding contact pieces extend from one ends of the strip-shaped guiding structures.
2. The internal anti-scratch structure suitable for use in an auto-injector according to claim 1, wherein: transition slopes are distributed between the strip-shaped guide structures and the protruding contact pieces, and the angle of each transition slope is 100-160 degrees.
3. The internal anti-scratch structure suitable for use in an auto-injector according to claim 2, wherein: the angle of the transition slope is 120 degrees.
4. The internal anti-scratch structure suitable for use in an auto-injector according to claim 1, wherein: the width of the strip-shaped guide structure is 1 to 2 mm.
5. The internal anti-scratch structure suitable for use in an auto-injector according to claim 1, wherein: the height of the strip-shaped guide structure is 0.3 to 1 mm.
6. The internal anti-scratch structure suitable for use in an auto-injector according to claim 1, wherein: the protruding contact piece is provided with a positioning groove, and one end of the auxiliary spring is in contact with the positioning groove.
7. The internal anti-scratch structure suitable for use in an auto-injector according to claim 1, wherein: the support structure has two, and the mirror image distributes on the lateral wall of bearing the weight of the body.
8. The internal anti-scratch structure suitable for use in an auto-injector according to claim 1, wherein: the support structures are four and are distributed on the outer side wall of the bearing body at equal intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121505281.8U CN214860063U (en) | 2021-07-02 | 2021-07-02 | Internal anti-scratching structure suitable for automatic injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121505281.8U CN214860063U (en) | 2021-07-02 | 2021-07-02 | Internal anti-scratching structure suitable for automatic injector |
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| Publication Number | Publication Date |
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| CN214860063U true CN214860063U (en) | 2021-11-26 |
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| CN202121505281.8U Active CN214860063U (en) | 2021-07-02 | 2021-07-02 | Internal anti-scratching structure suitable for automatic injector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113318302A (en) * | 2021-07-02 | 2021-08-31 | 苏州嘉树医疗科技有限公司 | Internal anti-scratching structure suitable for automatic injector |
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2021
- 2021-07-02 CN CN202121505281.8U patent/CN214860063U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113318302A (en) * | 2021-07-02 | 2021-08-31 | 苏州嘉树医疗科技有限公司 | Internal anti-scratching structure suitable for automatic injector |
| CN113318302B (en) * | 2021-07-02 | 2024-04-26 | 苏州嘉树医疗科技有限公司 | Internal scratch-proof structure suitable for automatic injector |
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