CN215995141U

CN215995141U - Easy-to-trigger structure suitable for self-administration device

Info

Publication number: CN215995141U
Application number: CN202122461736.7U
Authority: CN
Inventors: 熊长艳; 何四现; 郝明; 杜嘉文; 易林川
Original assignee: Suzhou Jiashu Medical Technology Co ltd
Current assignee: Suzhou Jiashu Medical Technology Co ltd
Priority date: 2021-10-13
Filing date: 2021-10-13
Publication date: 2022-03-11
Anticipated expiration: 2031-10-13

Abstract

The utility model relates to an easy trigger structure suitable for oneself device of dosing, including power card subassembly, wear to be equipped with push rod assembly in the power card subassembly, power card subassembly overcoat is equipped with the auxiliary spring, be provided with the main spring in the push rod assembly, the cover is equipped with sliding block set spare on the power card subassembly, the tail section and the auxiliary spring contact of slider, power card subassembly is including the power card body, the head end of power card body is provided with symmetric distribution contact extension piece and guide piece, be provided with the contact buckle on the contact extension piece, the outside of contact buckle is provided with slider stop gear, the inboard of contact buckle is provided with push rod guiding mechanism, be provided with the contact linking structure on the push rod subassembly, push rod guiding mechanism contacts with the contact linking structure. Therefore, the slider component can be attached to the slider limiting mechanism, and looseness cannot occur. Be equipped with push rod guiding mechanism, can link up the structure with the contact and mutually support, realize push rod assembly's the guide that goes forward, be convenient for better percussion.

Description

Easy-to-trigger structure suitable for self-administration device

Technical Field

The utility model relates to an easy trigger structure especially relates to an easy trigger structure suitable for oneself device of dosing.

Background

Currently, in order to facilitate users to realize independent and convenient self-administration therapy, self-administration systems or devices are popular. For the convenience of understanding, the automatic injector is mainly designed to have a disposable function in view of safety in use and in order to avoid secondary abuse.

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, in the existing self-administration devices, when the plunger is fired, the plunger may contact with the power card to cause dislocation, which results in delayed firing or failed firing, and affects the final medicine injection effect.

In view of the above-mentioned drawbacks, the present inventors have made active research and innovation to create an easy-to-fire structure suitable for a self-administration device, so that the easy-to-fire structure has industrial value.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model aims at providing an easy trigger structure suitable for oneself device of dosing.

The utility model discloses an easy trigger structure suitable for oneself device of dosing, including power card subassembly, wear to be equipped with push rod assembly in the power card subassembly, power card subassembly overcoat is equipped with the auxiliary spring, be provided with the main spring in the push rod assembly, the cover is equipped with sliding block assembly on the power card subassembly, the back end and the auxiliary spring contact of slider, wherein: the power card subassembly is including the power card body, the tail end of power card body is provided with power lid cooperation mouth, the head end of power card body is provided with symmetric distribution contact extension piece and guide piece, be provided with the contact buckle on the contact extension piece, the outside of contact buckle is provided with slider stop gear, the inboard of contact buckle is provided with push rod guiding mechanism, be provided with the contact linking structure on the push rod subassembly, push rod guiding mechanism contacts with the contact linking structure.

Further, the above easy-to-fire structure suitable for a self-administration device, wherein the slider limiting mechanism is of a semicircular ring structure protruding outwards, and the semicircular ring structure protruding outwards is provided with a slider contact strip.

Furthermore, the above easy-to-fire structure for a self-administration device, wherein the push rod guide mechanism comprises a guide groove, a plurality of guide strips are arranged in the guide groove, and a guide inclined plane is arranged at the tail end of the guide groove.

Further, the above-mentioned easy-to-fire structure for a self-administration device, wherein the guide bars are equidistantly spaced from each other.

Further, the above easy-to-fire structure for a self-administration device, wherein the guide strip is provided with a guide inclination angle, and the guide inclination angle is 15 to 50 degrees.

Still further, the above easy-to-fire structure for a self-administration device, wherein the contact engagement structure is an inner groove distributed on the surrounding push rod assembly, and contact slopes are provided at the upper and lower ends of the inner groove.

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

1. the slider component can be attached to the slider limiting mechanism, and looseness cannot occur.

2. Be equipped with push rod guiding mechanism, can link up the structure with the contact and mutually support, realize push rod assembly's the guide that goes forward, be convenient for better percussion.

3. The whole structure is simple, the existing power card assembly and the existing push rod assembly can be simply transformed, 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 diagram of a power card assembly.

Fig. 2 is a schematic structural view of the push rod assembly.

Fig. 3 is a schematic view of the combination of the putter assembly and the putter assembly.

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

1 push rod assembly 2 secondary spring

3 main spring 4 slide block assembly

5 contact extension piece of power card body 6

7 guide piece 8 slide block limiting mechanism

9 guide groove 10 guide strip

11 inner groove

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.

Fig. 1 to 3 show an easy-to-fire structure of a self-administration device, which comprises a power card assembly, and a push rod assembly 1 is inserted into the power card assembly. Meanwhile, an auxiliary spring 2 is sleeved outside the power clamp assembly, and a main spring 3 is arranged in the push rod assembly 1. And, the cover is equipped with sliding block set 4 on the power card subassembly, and the tail section and the contact of auxiliary spring 2 of slider, its distinctive and distinctive part lie in: the utility model discloses the power card subassembly that adopts is provided with power lid cooperation mouth including power card body 5, power card body 5's tail end. The head end of the power card body 5 is provided with a contact extension sheet 6 and a guide sheet 7 which are symmetrically distributed. The utility model discloses a contact extend and be provided with the contact buckle on the piece 6, can withdraw from downwards smoothly when the push rod assembly 1 of being convenient for actually applies force, satisfy the percussion of follow-up PFS subassembly. Specifically, the outer side of the contact buckle is provided with a slide block limiting mechanism 8, and the inner side of the contact buckle is provided with a push rod guide mechanism. Moreover, in order to make the push rod assembly 1 better guide the movement of the power card assembly and trigger the power card assembly under stress more easily, the push rod assembly 1 is provided with a contact connection structure, and the push rod guide mechanism is in contact with the contact connection structure.

In connection with a preferred embodiment of the present invention, considering that the end of the slider assembly 4 can be guided by a suitable limit during use, the slider limiting mechanism 8 is an outwardly protruding semicircular ring structure provided with a slider contact strip. Like this, slider contact strip can laminate at 4 inner walls of sliding block set spare, avoids sliding block set spare 4 to appear the abnormal card and dies.

Further see, the utility model discloses a push rod guiding mechanism be provided with a plurality of guide strips 10 including guide groove 9 in the guide groove 9, and guide groove 9's tail end is provided with the guide inclined plane. Thus, by the guide strip 10, the push rod assembly 1 can be properly guided when moving forward, so that the push rod assembly 1 is not inclined, and the push rod assembly 1 can be easily triggered. In order to achieve smooth guidance, the push rod assembly 1 can be sufficiently fitted around the outer periphery thereof, and the guide bars 10 are disposed at equal distances from each other. Meanwhile, in order to be better embedded into the contact engagement structure, and to be easily driven by the power of the push rod assembly 1, the guide bar 10 is provided with a guide inclination angle of 15 to 50 degrees. Correspondingly, the utility model discloses the inner groovy 11 that the contact that adopts links up the structure for distributing on encircleing push rod subassembly 1, the lower upper and lower both ends of inner groovy 11 are provided with the contact inclined plane. This facilitates better contact of the tappet guide mechanism with the tappet assembly 1.

The working principle of the utility model is as follows:

by means of the matching of the guide inclined plane and the inner groove 11, the guide inclined plane is tightly attached to the inner groove 11 under the elastic force of the main spring 3 during use. Meanwhile, the slider limiting mechanism 8 is limited by the inner circle structure of the slider assembly 4. Thereby, it is ensured that the push rod assembly 1 does not deflect in advancing. Thus, smoother firing 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 is to 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 the orientation or positional relationship indicated in the drawings for convenience in describing the invention and for simplicity in 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 construed 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. Easy trigger structure suitable for self-administration device, including power card subassembly, wear to be equipped with push rod assembly in the power card subassembly, power card subassembly overcoat is equipped with the auxiliary spring, be provided with the main spring in the push rod assembly, the cover is equipped with sliding block assembly on the power card subassembly, the tail section and the auxiliary spring contact of slider, its characterized in that: the power card subassembly is including the power card body, the tail end of power card body is provided with power lid cooperation mouth, the head end of power card body is provided with symmetric distribution contact extension piece and guide piece, be provided with the contact buckle on the contact extension piece, the outside of contact buckle is provided with slider stop gear, the inboard of contact buckle is provided with push rod guiding mechanism, be provided with the contact linking structure on the push rod subassembly, push rod guiding mechanism contacts with the contact linking structure.

2. The easy-fire structure suitable for use in a self-administration device according to claim 1, wherein: the sliding block limiting mechanism is of an outwards convex semicircular structure, and a sliding block contact strip is arranged on the outwards convex semicircular structure.

3. The easy-fire structure suitable for use in a self-administration device according to claim 1, wherein: the push rod guide mechanism comprises a guide groove, a plurality of guide strips are arranged in the guide groove, and a guide inclined plane is arranged at the tail end of the guide groove.

4. The easy-fire structure suitable for use in a self-administration device according to claim 3, wherein: the guide strips are distributed at equal intervals.

5. The easy-fire structure suitable for use in a self-administration device according to claim 3, wherein: the guide strip is provided with a guide inclination angle of 15 to 50 degrees.

6. The easy-fire structure suitable for use in a self-administration device according to claim 1, wherein: the contact connection structure is an inner groove distributed on the surrounding push rod assembly, and contact inclined planes are arranged at the lower and upper ends of the inner groove.