CN113318300A

CN113318300A - Slide block guide mechanism suitable for precision fit of automatic injector

Info

Publication number: CN113318300A
Application number: CN202110753057.9A
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: 2021-07-02
Filing date: 2021-07-02
Publication date: 2021-08-31

Abstract

The invention relates to a slide block guide mechanism suitable for precise matching of an automatic injector, which comprises a bearing main body, wherein a slide block assembly is movably sleeved on the bearing main body, a plurality of main guide structures are arranged on the outer wall of the bearing main body, corresponding auxiliary guide structures are arranged on the inner wall of the slide block assembly, when the slide block assembly is combined with the bearing main body, the main guide structures are combined with the corresponding auxiliary guide structures, and the tail end of the main guide structure is provided with a stop structure. Therefore, by means of mutual matching of the main guide structure and the auxiliary guide structure, the sliding block assembly can only move forward in a linear direction outside the bearing main body, and shaking deflection of the sliding block assembly is avoided. The automatic injector can partially replace the components of the existing automatic injector, has better universality and is convenient to implement. Be equipped with the guide lamella, slider assembly's contact is more smooth and easy.

Description

Slide block guide mechanism suitable for precision fit of automatic injector

Technical Field

The invention relates to a structure for a self-administration system, in particular to a slide block guide mechanism suitable for precise matching of an 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, in each of the conventional auto-injectors, since the slider cannot be axially constrained during the forward firing, if the operator is inexperienced, the slider is likely to axially rotate, which causes the slider to be misaligned during the contact with the PFS or the PFS holder. Therefore, the smoothness of the percussion can be influenced, injection delay or blockage can easily occur, and the use of the injector is influenced.

In view of the above-mentioned drawbacks, the present designer is actively making research and innovation to create a slide guiding mechanism suitable for precise matching of an automatic injector, so that the slide guiding mechanism has industrial application value.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide a slide block guide mechanism suitable for precise matching of an automatic injector.

The invention relates to a slide block guide mechanism suitable for precise matching of an automatic injector, which comprises a bearing main body, wherein a slide block assembly is movably sleeved on the bearing main body, wherein: the outer wall of the bearing main body is provided with a plurality of main guide structures, the inner wall of the sliding block assembly is provided with corresponding auxiliary guide structures, when the sliding block assembly is combined with the bearing main body, the main guide structures are combined with the corresponding auxiliary guide structures, and the tail end of the main guide structure is provided with a stop structure.

Further, the above mentioned slide block guiding mechanism suitable for precision fit of the automatic injector, wherein the main guiding structure is a guiding strip, the auxiliary guiding structure is a guiding groove, and the stopping structure is a stopping slope.

Further, the above mentioned slide block guiding mechanism for precision fit of automatic injector is provided, wherein the width of the guiding strip is 0.5 to 1.5 mm, and the cross section of the guiding strip is rectangular.

Further, the above mentioned slide guiding mechanism for precision fitting of automatic injector is provided, wherein the height of the guiding strip is 0.5 to 1.5 mm.

Furthermore, the slide block guiding mechanism suitable for the precise matching of the automatic injector is characterized in that the slide block assembly comprises a slide block body, the front end of the slide block body extends to form guiding flaps distributed in a mirror image mode, and a guiding groove is formed in the inner wall of the guiding flap.

Furthermore, the slide block guiding mechanism suitable for the precise matching of the automatic injector is provided, wherein the guiding flap is of an arc-shaped flap structure.

Furthermore, the slide block guide mechanism suitable for the precise matching of the automatic injector is characterized in that a reinforcing ring is arranged on the outer side of the slide block body, and a plurality of reinforcing ribs are arranged on the reinforcing ring.

Still further, the slide block guiding mechanism suitable for the precise matching of the automatic injector is characterized in that the main guiding structure is provided with a variable groove at the front end of the bearing main body.

By the scheme, the invention at least has the following advantages:

1. by means of the mutual matching of the main guide structure and the auxiliary guide structure, the sliding block assembly can only move forward in a linear direction outside the bearing main body, and the sliding block assembly is prevented from shaking and deflecting.

2. The automatic injector can partially replace the components of the existing automatic injector, has better universality and is convenient to implement.

3. Be equipped with the guide lamella, slider assembly's contact is more smooth and easy.

4. Through the existence of the reinforcing ring, can bear great external stress, can not take place deformation or fracture easily.

5. The automatic injector has the advantages of simple integral structure, easy manufacture and no additional occupation of the internal space of the automatic injector.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.

Drawings

Fig. 1 is a schematic structural view of a load bearing body.

Fig. 2 is a schematic structural view of the slider assembly.

FIG. 3 is a schematic view of the slider assembly, the carrier body, in combination.

Figure 4 is a schematic view of the slide assembly, carrying body, encased in an automatic injector housing.

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

1 bearing body 2 slide block assembly

3 guide strip 4 guide groove

5 stop slope 6 guide flap

7 reinforcing ring and 8 reinforcing ribs

9 deformation groove 10 auxiliary spring

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with 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.

A slider guiding mechanism suitable for automatic syringe precision fit as fig. 1 to 3, including bearing main part 1, the activity cover is equipped with slider component 2 on bearing main part 1, and its distinctive and unusual lies in: in order to realize smooth motion guiding and avoid unnecessary shaking or deflection of the sliding block component 2 during forward motion, the outer wall of the bearing main body 1 is provided with a plurality of main guide structures, and the inner wall of the sliding block component 2 is provided with a corresponding auxiliary guide structure. In this way, when the slider assembly 2 is coupled with the carrier body 1, the primary guide structure is coupled with the corresponding secondary guide structure. Meanwhile, in order to prevent excessive pressure from being applied to the pressing end of the syringe when the slider assembly 2 is appropriately reset and to realize appropriate movement organization, the tail end of the main guide structure is provided with a stop structure.

In a preferred embodiment of the present invention, the main guiding structure is a guiding strip 3, the auxiliary guiding structure is a guiding groove 4, and the stopping structure is a stopping slope 5. Specifically, the width of the guide bar 3 is 0.5 to 1.5 mm, and the cross section of the guide bar 3 is rectangular. Meanwhile, the height of the guide bar 3 is 0.5 to 1.5 mm. And, the concrete size structure of guide slot 4 and guide strip 3 mutually support, satisfy slider assembly 2 under the exogenic action smooth slip can. Of course, the actual shape and size of the guide strip 3 can be adjusted according to the type of the automatic injector, and the invention only provides a proper implementation range, and the practical implementation is not limited to be only in the scope disclosed by the invention.

Further, the sliding block assembly 2 adopted by the invention comprises a sliding block body, the front end of the sliding block body extends to form guide flaps 6 distributed in a mirror image manner, and the inner wall of the guide flap is provided with a guide groove 4. In this way, the guide flap 6 can be in contact fit with the PFS bracket when the slider body moves forward. Meanwhile, in order to facilitate the adhesion of the PFS and the profile distribution of the PFS bracket, the guide flap 6 has an arc-shaped flap structure.

In view of practical implementation, considering that the slider body may need to bear the huge impact force brought by the secondary spring 10 during use to trigger the PFS, in order to avoid abnormal deformation, the slider body will not be jammed during movement and is convenient to move forward under the guidance of the guide strip 3, the outer side of the slider body is provided with the reinforcing ring 7, and the reinforcing ring 7 is provided with a plurality of reinforcing ribs 8.

Still further, in order to avoid the main guide structure from cracking when the main guide structure is subjected to a firing impact, a deformation groove 9 is distributed at the front end of the load bearing body 1. In this way, a local release of stress can be achieved, avoiding that the lower end of the load bearing body 1 is excessively pressed.

It should be noted that the present invention is only exemplified by an automatic injector, and can be applied to various self-administration systems, which are not described herein.

The working principle of the invention is as follows: along with the use of the user for percussion, the slider assembly 2 slides along the distribution of the guide strips 3 outside the bearing body 1 under the matching of the guide grooves 4 of the slider assembly, and the acting force brought by the auxiliary spring 10 is smoothly transmitted to the PFS. During implementation, four guide strips 3 may be used, which are distributed around the outer edge of the carrier body 1 at equal distances from each other and run in the same direction as the front-back distribution of the carrier body 1. Thus, the forward moving direction of the slide block component 2 is ensured to be linear as much as possible, and axial rotation is avoided.

The invention has the following advantages by the aid of the character expression and the accompanying drawings:

Furthermore, the indication of the orientation or the positional relationship described in the present invention is based on the orientation or the positional relationship shown in the drawings, and is only for convenience of describing the present invention and simplifying the description, but does not indicate or imply that the indicated device or configuration must have a specific orientation or be operated in a specific orientation configuration, and thus, 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 defined 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 fixedly connected, detachably connected, or integrally formed; 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. 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, refer to an orientation or positional relationship illustrated in the drawings, which are used for convenience in describing the invention and to simplify the description, and do not indicate or imply that the device or component being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to 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, it should be noted that, for those skilled in the art, many 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. The utility model provides a slider guiding mechanism suitable for automatic syringe precision fit, is including bearing the main part, the last movable sleeve of bearing the main part is equipped with sliding block set spare, its characterized in that: the outer wall of the bearing main body is provided with a plurality of main guide structures, the inner wall of the sliding block assembly is provided with corresponding auxiliary guide structures, when the sliding block assembly is combined with the bearing main body, the main guide structures are combined with the corresponding auxiliary guide structures, and the tail end of the main guide structure is provided with a stop structure.

2. A slide guide mechanism adapted for precision fitting of an automatic injector according to claim 1, wherein: the main guide structure is a guide strip, the auxiliary guide structure is a guide groove, and the stop structure is a stop slope.

3. A slide guide mechanism adapted for precision fitting of an automatic injector according to claim 2, wherein: the width of the guide strip is 0.5 to 1.5 millimeters, and the cross section of the guide strip is rectangular.

4. A slide guide mechanism adapted for precision fitting of an automatic injector according to claim 2, wherein: the height of the guide strip is 0.5 to 1.5 mm.

5. A slide guide mechanism adapted for precision fitting of an automatic injector according to claim 1, wherein: the slider component is including the slider body, the front end extension of slider body has the guide lamella of mirror image distribution, the guiding groove has been seted up to the bad inner wall of guide.

6. A slide guide mechanism adapted for precision fitting of an automatic injector according to claim 5, wherein: the guide flap is of an arc-shaped flap structure.

7. A slide guide mechanism adapted for precision fitting of an automatic injector according to claim 5, wherein: the outside of slider body is provided with the beaded finish, be provided with a plurality of strengthening ribs on the beaded finish.

8. A slide guide mechanism adapted for precision fitting of an automatic injector according to claim 1, wherein: the main guide structure is positioned at the front end of the bearing main body and is distributed with variable grooves.