Injection pen back cover mounting tool

Abstract

The utility model belongs to injection pen mounting tool technical field, concretely relates to a kind of injection pen rear cover mounting tool, comprising: base, placement hole is opened on it, the placement hole is suitable for placing internal parts, hard shaft is inserted in the base;Gland, through hole is opened on it, the through hole is set on hard shaft, the side wall of the gland is equipped with placement notch, the placement notch is suitable for placing rear cover;And, the hard shaft is provided with a pair, and it is respectively arranged in the both sides of the placement hole;Briefly, by slidingly setting the gland on hard shaft, and setting placement notch on the gland to place rear cover, placement hole is opened on base to install internal parts (including push rod, push rod support etc.), then the buckling of internal parts and rear cover is completed by pressing down gland, to avoid safety accident when manual installation, rear cover pops out.

Description

Technical Field

[0001] This utility model belongs to the technical field of injection pen installation fixtures, specifically relating to an injection pen back cover installation fixture. Background Technology

[0002] The injection pen is an innovative drug delivery device that combines medication and injection functions, designed to enable patients who require long-term subcutaneous injections to self-medicate more safely and conveniently.

[0003] Existing injection pens typically consist of a pen body, a back cover, an injection assembly, and a vial assembly. The back cover is pressed onto the end of the pen body and has a pin to hold a spring. The plunger in the injection assembly needs to compress the spring and be fastened to the back cover. The current installation method usually involves the operator manually compressing the spring and fastening the plunger to the back cover before installing the back cover onto the end of the pen body. However, due to the large elastic force when the spring is compressed, manual installation is inefficient and can easily cause the plunger or back cover to pop out, resulting in a safety accident.

[0004] Therefore, how to avoid safety accidents caused by manually pressing the push rod is a technical problem that urgently needs to be solved in this field.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Utility Model Content

[0006] This disclosure provides at least one embodiment of an injection pen back cover mounting fixture.

[0007] In a first aspect, embodiments of this disclosure provide a fixture for mounting the back cover of an injection pen, comprising: a base having a placement hole adapted to hold internal parts, and a rigid shaft inserted into the base; a pressure cap having a through hole fitted onto the rigid shaft, the through hole being fitted onto the rigid shaft, and a placement notch on the side wall of the pressure cap adapted to hold the back cover; and the rigid shaft being provided in pairs and respectively disposed on both sides of the placement hole.

[0008] In one alternative embodiment, a return spring is fitted onto the rigid shaft, with its two ends abutting against the base and the pressure cap, respectively.

[0009] In one alternative embodiment, a limiting sleeve is fitted at the end of the rigid shaft, and a bolt is inserted into the axis of the limiting sleeve so that the limiting sleeve is detachably connected to the rigid shaft, and the bottom of the limiting sleeve is adapted to abut against the pressure cap to prevent the pressure cap from sliding out of the rigid shaft.

[0010] In one optional embodiment, a fitting ring is inserted into the through hole, and a connecting ring is integrally provided on the top of the fitting ring. The connecting ring fits against the top of the pressure cap, and the connecting ring is connected to the pressure cap by bolts; and the fitting ring is sleeved on the rigid shaft and has a clearance fit with the rigid shaft.

[0011] In one alternative embodiment, the sidewall of the cap is provided with a pair of handles, the handles being collinear and parallel to the length direction of the cap.

[0012] In one optional embodiment, the side wall of the gland is provided with a countersunk hole, and the bottom of the countersunk hole is provided with a threaded hole; the handle is inserted into the countersunk hole, and the end of the handle is provided with a thread to connect to the threaded hole.

[0013] In one alternative embodiment, the end of the grip is provided with a spherical force-bearing block.

[0014] In one alternative embodiment, the placement notch is formed on the long sidewall of the cover, and the opening of the placement notch is provided with an inclined slope to guide the back cover to slide in; and a support ring is provided in the placement notch, the support ring being adapted to support the step of the sidewall of the back cover.

[0015] In one optional embodiment, a positioning block is provided within the placement notch, the positioning block being adapted to be inserted into the notch in the side wall of the back cover to position the circumferential angle of the back cover.

[0016] In one alternative embodiment, the base is provided with a placement seat, the placement seat having an alignment notch adapted to insert an internal part to position the circumferential angle of the internal part; and the placement seat is fitted with a placement sleeve, the placement hole being formed on the axis of the placement sleeve.

[0017] The beneficial effect of this utility model is that the injection pen back cover mounting fixture slides the pressure cap on the rigid shaft, and a placement notch is opened on the pressure cap to place the back cover. Placement holes are opened on the base to install internal parts (including push rods, push rod brackets, etc.). Then, the internal parts are fastened to the back cover by pressing down the pressure cap, thus avoiding the back cover popping out and causing safety accidents during manual installation.

[0018] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description, claims, and drawings.

[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 A perspective view of an injection pen back cover mounting fixture provided in an embodiment of this disclosure; Figure 2 A perspective view of an injection pen back cover mounting fixture provided in an embodiment of this disclosure; Figure 3 A connection diagram of a gland, rigid shaft, and grip provided for an embodiment of this disclosure.

[0022] In the picture: 1. Base; 11. Place the sleeve; 11a. Place the hole; 12. Hardened shaft; 12a. Limiting sleeve; 13. Return spring; 14. Placement base; 14a. Alignment notch; 2. Capping; 21. Through hole; 21a. Fitting ring; 21b. Connecting ring; 22. Placement notch; 22a. Inclined slope; 22b. Support ring; 22c. Positioning block; 23. Handle; 23a. Force-bearing block; 24. Countersunk hole; 24a. Threaded hole; 3. Internal parts; 4. Back cover. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0025] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0026] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0027] Research has revealed that in existing technologies, manually pressing internal parts and the back cover is inefficient and the internal parts and the back cover cannot be kept completely collinear, which can easily cause them to pop out and hit personnel, resulting in safety accidents. This is the problem and objective that the utility model aims to solve.

[0028] Based on the above research, this disclosure provides a fixture for mounting the back cover of an injection pen. By fitting a pressure cap on a rigid shaft, the pressure cap can only slide up and down, preventing internal parts or the back cover from popping out.

[0029] The shortcomings of the above solutions are the result of the utility model inventor's practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as contributions made by the utility model inventor to this disclosure.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0031] The following detailed description, with reference to the accompanying drawings, describes some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0032] See Figures 1 to 3 This invention illustrates a fixture for installing a back cover 4 of an injection pen, comprising: a base 1 with a placement hole 11a adapted to place an internal part 3, and a rigid shaft 12 inserted into the base 1; a pressure cap 2 with a through hole 21 fitted onto the rigid shaft 12, and a placement notch 22 on the side wall of the pressure cap 2 adapted to place the back cover 4; and a pair of rigid shafts 12 respectively disposed on both sides of the placement hole 11a. In short, by sliding the pressure cap 2 onto the rigid shaft 12 and placing the back cover 4 in the placement notch 22, and by placing the internal part 3 (including a push rod, push rod bracket, etc.) in the placement hole 11a on the base 1, the internal part 3 and the back cover 4 are fastened together by pressing down the pressure cap 2, thus preventing the back cover 4 from popping out and causing a safety accident during manual installation.

[0033] In some embodiments, a return spring 13 is sleeved on the rigid shaft 12, and the two ends of the return spring 13 abut against the base 1 and the pressure cover 2 respectively; in short, after the pressure cover 2 has been pressed, it is slid up and reset by the return spring 13, waiting for the next operation to begin.

[0034] In some embodiments, a limiting sleeve 12a is fitted onto the end of the rigid shaft 12, and a bolt is inserted into the axis of the limiting sleeve 12a so that the limiting sleeve 12a is detachably connected to the rigid shaft 12. The bottom of the limiting sleeve 12a is adapted to abut against the pressure cap 2 to prevent the pressure cap 2 from sliding out of the rigid shaft 12. In short, the limiting sleeve 12a is fitted onto the end of the rigid shaft 12 and connected by bolts so that the end of the rigid shaft 12 forms a limit to prevent the pressure cap 2 from sliding out of the rigid shaft 12.

[0035] In some embodiments, a fitting ring 21a is inserted into the through hole 21, and a connecting ring 21b is integrally provided on the top of the fitting ring 21a. The connecting ring 21b fits against the top of the pressure cap 2, and the connecting ring 21b is connected to the pressure cap 2 by bolts. Furthermore, the fitting ring 21a is sleeved on the rigid shaft 12 and has a clearance fit with the rigid shaft 12. In short, the fitting ring 21a is inserted into the through hole 21, and the inner hole of the fitting ring 21a has a clearance fit with the rigid shaft 12, ensuring that the pressure cap 2 can slide smoothly up and down on the rigid shaft 12.

[0036] In some embodiments, a pair of handles 23 are provided on the side wall of the pressure cap 2. The handles 23 are arranged collinearly and are parallel to the length direction of the pressure cap 2. In short, a pair of handles 23 are provided on the short edge of the pressure cap 2 to facilitate the operator to press down the pressure cap 2.

[0037] In some embodiments, the side wall of the pressure cap 2 is provided with a countersunk hole 24, and the bottom of the countersunk hole 24 is provided with a threaded hole 24a; the handle 23 is inserted into the countersunk hole 24, and the end of the handle 23 is provided with a thread to connect to the threaded hole 24a; in short, the thread at the end of the handle 23 is screwed into the connecting thread, and the handle 23 is screwed into the bottom of the countersunk hole 24 to complete the fastening of the handle 23.

[0038] In some embodiments, the end of the grip 23 is provided with a spherical force-bearing block 23a; in short, the operator places his hand on the larger force-bearing block 23a to reduce the pressure of the grip 23 on the hand and improve the convenience of the operator.

[0039] In some embodiments, the placement notch 22 is formed on the long sidewall of the pressure cover 2, and the opening of the placement notch 22 is provided with an inclined slope 22a to guide the rear cover 4 to slide in; and a support ring 22b is provided in the placement notch 22, the support ring 22b being adapted to support the step of the sidewall of the rear cover 4; in short, the inclined slope 22a facilitates pressing the rear cover 4 into the notch, and the support ring 22b is provided in the placement notch 22 to support the rear cover 4 and prevent the rear cover 4 from falling off.

[0040] In some embodiments, a positioning block 22c is provided in the placement notch 22. The positioning block 22c is adapted to be inserted into the notch on the side wall of the rear cover 4 to position the circumferential angle of the rear cover 4. In short, after the rear cover 4 is pressed into the placement notch 22, the notch on its side wall is aligned with the positioning block 22c to adjust the angle of the rear cover 4 and ensure that the rear cover 4 can be accurately fastened with the internal parts 3.

[0041] In some embodiments, the base 1 is provided with a placement seat 14, the placement seat 14 having an alignment notch 14a, the alignment notch 14a being adapted to insert an internal part 3 to position the circumferential angle of the internal part 3; and, the placement seat 14 is fitted with a placement sleeve 11, the placement hole 11a being formed on the axis of the placement sleeve 11; in short, the base 1 is provided with a placement seat 14, the internal part 3 is fitted on the placement seat 14, and the protrusion of the internal part 3 is aligned with the alignment notch 14a, ensuring that the internal part 3 can be stably fastened to the back cover 4; the placement seat 14 is fitted with a placement sleeve 11 to form a placement hole 11a.

[0042] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as the second element, component, region, layer, or segment.

[0044] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0045] In the above discussion, unless otherwise stated, when used to describe numerical values, the terms “about,” “approximately,” “basically,” etc., indicate a change of + / - 10% in that value.

[0046] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A fixture for mounting the back cover (4) of an injection pen, characterized in that, include: A base (1) has a placement hole (11a) on it, the placement hole (11a) is suitable for placing internal parts (3), and a rigid shaft (12) is inserted into the base (1). A pressure cap (2) has a through hole (21) on it, the through hole (21) being fitted onto a rigid shaft (12), and a placement notch (22) is provided on the side wall of the pressure cap (2), the placement notch (22) being suitable for placing a rear cover (4); and, The rigid shaft (12) is provided in pairs, and is respectively provided on both sides of the placement hole (11a).

2. The fixture for installing the injection pen back cover (4) as described in claim 1, characterized in that, A return spring (13) is sleeved on the rigid shaft (12), and the two ends of the return spring (13) abut against the base (1) and the pressure cap (2) respectively.

3. The fixture for installing the injection pen back cover (4) as described in claim 1, characterized in that, The end of the rigid shaft (12) is fitted with a limiting sleeve (12a), and the axis of the limiting sleeve (12a) is connected with a bolt so that the limiting sleeve (12a) can be detachably connected to the rigid shaft (12). The bottom of the limiting sleeve (12a) is adapted to abut against the pressure cap (2) to prevent the pressure cap (2) from sliding out of the rigid shaft (12).

4. The fixture for installing the injection pen back cover (4) as described in claim 1, characterized in that, A fitting ring (21a) is inserted into the through hole (21), and a connecting ring (21b) is integrally provided on the top of the fitting ring (21a). The connecting ring (21b) fits against the top of the pressure cap (2), and the connecting ring (21b) is connected to the pressure cap (2) by bolts; and, The fitting ring (21a) is sleeved on the rigid shaft (12) and has a clearance fit with the rigid shaft (12).

5. The fixture for installing the injection pen back cover (4) as described in claim 1, characterized in that, The side wall of the pressure cap (2) is provided with a pair of handles (23), the handles (23) are arranged collinearly, and the handles (23) are arranged parallel to the length direction of the pressure cap (2).

6. The fixture for installing the injection pen back cover (4) as described in claim 5, characterized in that, The side wall of the pressure cap (2) is provided with a countersunk hole (24), and the bottom of the countersunk hole (24) is provided with a threaded hole (24a). The grip (23) is inserted into the mounting countersunk hole (24), and the end of the grip (23) is provided with threads to connect to the threaded hole (24a).

7. The fixture for installing the injection pen back cover (4) as described in claim 5, characterized in that, The end of the grip (23) is provided with a spherical force-bearing block (23a).

8. The fixture for installing the injection pen back cover (4) as described in claim 1, characterized in that, The placement notch (22) is formed on the long sidewall of the pressure cap (2), and the opening of the placement notch (22) is provided with an inclined slope (22a) to guide the rear cover (4) to slide in; and, A support ring (22b) is provided in the placement notch (22), and the support ring (22b) is adapted to support the step of the side wall of the rear cover (4).

9. The fixture for installing the injection pen back cover (4) as described in claim 8, characterized in that, A positioning block (22c) is provided in the placement notch (22), and the positioning block (22c) is adapted to be inserted into the notch in the side wall of the back cover (4) to position the circumferential angle of the back cover (4).

10. The fixture for installing the injection pen back cover (4) as described in claim 9, characterized in that, The base (1) is provided with a placement seat (14), and the placement seat (14) has an alignment notch (14a) which is suitable for inserting an internal part (3) to position the circumferential angle of the internal part (3); and, The placement seat (14) is fitted with a placement sleeve (11), and the placement hole (11a) is opened on the axis of the placement sleeve (11).

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