Shell assembly of automatic injection device and automatic injection device

Abstract

The utility model relates to the field of medical instruments, and particularly discloses a shell assembly of an automatic injection device and the automatic injection device. The shell assembly comprises a shell, a protective sleeve and a pen cap; the shell is arranged on the periphery of the protective sleeve in a sleeving mode, and circumferential limiting pieces are arranged on the inner wall of the shell and / or the outer wall of the protective sleeve; the pen cap is arranged at one end of the shell and used for protecting the automatic injection device, a coordination piece extending in the axis direction is arranged at one end of the pen cap, and the coordination piece is used for being matched with the circumferential limiting piece to limit circumferential movement of the pen cap. Specifically, the protective sleeve is used for starting the automatic injection device and protecting the needle head after injection is completed, and human body injury or needle head damage caused by exposure of the needle head is avoided. The shell is used for protecting the protective sleeve and other components. The circumferential movement of the pen cap is limited through the cooperation of the coordination piece and the circumferential limiting piece, so that the risk that the pen cap is loosened or even falls off, and consequently a needle loses protection or an injection device is touched by mistake is improved or avoided.

Description

Technical Field

[0001] The utility model relates to the field of medical devices, and particularly to a housing assembly of an automatic injection device and an automatic injection device. Background Art

[0002] With the development of technology and social progress, people have put forward higher requirements for the use of injection devices. People hope that the injection device has simple operation steps; has multi-dimensional feedback (such as auditory, visual, tactile) during the injection process to facilitate patients to control the entire injection process and reduce anxiety; needs to ensure that the needle tip is not exposed before and after injection to cause fear to users; should also have functions such as anti-misoperation and / or anti-secondary use, and at the same time put forward higher requirements for the miniaturization, portability, ease of use, and economy of the product. How to achieve the above functions and meet the market demand has currently attracted the attention of more and more engineering and technical personnel.

[0003] However, in the existing injection devices, the pen cap may be loose before injection and may even fall off from the injection device, thus causing the risk of the needle losing protection and the injection device being misoperated. Summary of the Utility Model

[0004] The present application provides a housing assembly of an automatic injection device and an automatic injection device, and the housing assembly can improve or avoid the risk that the pen cap is loose or even falls off, resulting in the needle losing protection or the injection device being misoperated.

[0005] To solve the above technical problems, one technical solution adopted by the present application is: to provide a housing assembly of an automatic injection device and an automatic injection device, the housing assembly includes a housing, a protection sleeve and a pen cap; the housing is sleeved on the outer periphery of the protection sleeve, and circumferential limit members are arranged on the inner wall of the housing and / or the outer wall of the protection sleeve; the pen cap is arranged at one end of the housing for protecting the automatic injection device, and a coordination member extending along the axial direction is arranged at one end of the pen cap, and the coordination member is used to cooperate with the circumferential limit member to limit the circumferential movement of the pen cap.

[0006] Wherein, the pen cap includes a pen cap body, the pen cap body includes a closed end and an open end, and the coordination member is located at the open end and extends out of the open end.

[0007] Wherein, one end of the coordination member is arranged on the closed end; or, one end of the coordination member is arranged on the side wall of the pen cap body.

[0008] Wherein, the coordination member includes a convex plate, and the convex plate at least includes an arc-shaped plate, and the arc-shaped plate is used to cooperate with the outer wall of the protection sleeve or the inner wall of the housing.

[0009] Among them, the pen cap further includes a limiting block, which is arranged on the pen cap body and extends axially out of the open end, and the limiting block is arranged at an interval from the coordinating member; the protective sleeve is provided with a clamping portion, and the inner wall of the housing is provided with a clamping groove. When the pen cap is inserted into the housing, the limiting block abuts against the clamping portion so that the clamping portion is stuck in the clamping groove to limit the movement of the protective sleeve.

[0010] Among them, the pen cap is also symmetrically provided with two extension arms, and hooks are arranged at the ends of the extension arms away from the pen cap body, and the hooks are used for detachably clamping the needle protection cap; the extension arms and the limiting block are arranged at intervals along the circumferential direction of the pen cap.

[0011] Among them, the circumferential limiting member includes two slide rails and a groove. The two slide rails are arranged at intervals along the circumferential direction on one of the inner wall of the housing or the outer wall of the protective sleeve, and both extend in the axial direction; the groove is arranged on the other of the outer wall of the protective sleeve or the inner wall of the housing; the two slide rails are clamped inside the groove to form a hollow cavity with an opening, and the coordinating member can be detachably inserted into the hollow cavity.

[0012] Among them, the two slide rails respectively abut against the two side walls of the groove, and the side of the coordinating member abuts against the slide rail.

[0013] Among them, a through hole is formed by surrounding one end of the barrel of the protective sleeve, and the groove or the slide rail is located at one end close to the through hole.

[0014] The present application also includes a second technical solution, providing an automatic injection device, including the above-mentioned housing assembly.

[0015] The beneficial effect of the present application is: different from the prior art, the housing assembly of the automatic injection device provided by the present application includes a housing, a protective sleeve and a pen cap. The protective sleeve is used to start the automatic injection device and protect the needle after the injection is completed, avoiding the needle being exposed and causing human injury or needle damage. The housing is sleeved on the outer periphery of the protective sleeve to protect components such as the protective sleeve. A circumferential limiting member is arranged on the inner wall of the housing and / or the outer wall of the protective sleeve. The pen cap is arranged at one end of the housing to protect the automatic injection device. One end of the pen cap is provided with a coordinating member extending in the axial direction, and the coordinating member is used to cooperate with the circumferential limiting member to limit the circumferential movement of the pen cap. The present application limits the circumferential movement of the pen cap by the cooperation of the coordinating member and the circumferential limiting member, thereby improving or avoiding the risk that the pen cap loosens or even falls off, resulting in the needle losing protection or the injection device being accidentally touched. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a partial structural schematic diagram of an embodiment of the automatic injection device provided by the present application;

[0017] Figure 2 is a partial structural schematic diagram of another embodiment of the automatic injection device provided by the present application;

[0018] Figure 3 is a schematic structural diagram of a pen cap of the outer shell assembly provided by the present application;

[0019] Figure 4 is a schematic structural diagram of a housing of the outer shell assembly provided by the present application;

[0020] Figure 5 is a schematic structural diagram of a protective sleeve of the outer shell assembly provided by the present application. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope protected by the present application.

[0022] The terms "first", "second" in the present application are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the description of the present application, the meaning of "several" and "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0023] Referring to

[0024] Please refer to Figures 1-5, in one aspect of the present application, a housing assembly of an automatic injection device is provided. The housing assembly includes a housing 1, a protective sleeve 2, and a pen cap 3. The protective sleeve 2 is used to activate the automatic injection device and protect the needle after injection is completed, avoiding injury to the human body or damage to the needle caused by the exposed needle. The housing 1 is sleeved on the outer periphery of the protective sleeve 2 to protect components such as the protective sleeve 2. Circumferential limit members are provided on both the inner wall of the housing 1 and the outer wall of the protective sleeve 2. The pen cap 3 is provided at one end of the housing 1 to protect the automatic injection device. One end of the pen cap 3 is provided with a coordination member 31 extending along the axial direction. The coordination member 31 is used to cooperate with the circumferential limit member to limit the circumferential movement of the pen cap 3. The housing assembly of the embodiment of the present application limits the circumferential movement of the pen cap 3 through the cooperation of the coordination member 31 and the circumferential limit member, thereby improving or avoiding the risk of the pen cap 3 loosening or even falling off, resulting in the needle losing protection or the injection device being accidentally touched, and improving the stability of the automatic injection device.

[0025] Specifically, a first circumferential limit member is provided on the inner wall of the housing 1 and extends radially inward along the housing 1. A second circumferential limit member is provided on the outer wall of the protective sleeve 2 and extends radially outward along the protective sleeve 2. Since the housing 1 is sleeved on the outer periphery of the protective sleeve 2, the first circumferential limit member can abut against the outer wall of the protective sleeve 2 and cooperate with the second circumferential limit member to form a hollow cavity with an opening. The coordination member 31 is located in the hollow cavity to limit the circumferential movement of the coordination member 31. Further, the pen cap 3 is detachably inserted into one end of the housing 1. The coordination member 31 extends along the axial direction. When the pen cap 3 is inserted into the housing 1, the coordination member 31 is aligned with the position of the circumferential limit member and drives the coordination member 31 into the hollow cavity, so that the circumferential limit member restricts the circumferential movement of the coordination member 31, thereby restricting the circumferential rotation of the pen cap 3 and achieving circumferential limitation, thereby improving or avoiding the risk of the pen cap 3 loosening or even falling off, resulting in the needle losing protection or the injection device being accidentally touched. It should be noted that the first circumferential limit member and the second circumferential limit member both belong to the circumferential limit member, and are only used to distinguish the circumferential limit members at different positions.

[0026] In another embodiment, the circumferential limit member can also be provided only on the inner wall of the housing 1 to reduce the design and manufacturing costs, but the reliability and stability will be reduced compared to the above embodiment. In other embodiments, the circumferential limit member can also be provided only on the outer wall of the protective sleeve 2.

[0027] In one embodiment of the present application, the pen cap 3 includes a pen cap body 32. The pen cap body 32 includes a closed end 321 and an open end 322. The coordination member 31 is located at the open end 322 and extends out of the open end 322.

[0028] Specifically, one end of the pen cap body 32 is a closed end 321, and the other end is an open end 322. A receiving space is provided between the open end 322 and the closed end 321, which can accommodate the needle protection cap 4 covering the needle, further playing a role in protecting the needle and avoiding damage to the needle by external forces. The closed end 321 encloses the automatic injection device to protect the automatic injection device from unexpected triggering. The coordination member 31 extends out from the open end 322 and is exposed outside the pen cap body 32. When the pen cap 3 is inserted into the housing 1, the open end 322 of the pen cap body 32 abuts against one end of the housing 1, and the coordination member 31 can extend into the housing 1, so that the coordination member 31 cooperates with the circumferential limiting member to limit the circumferential rotation of the pen cap 3, achieve circumferential limiting, thereby improving or avoiding the risk that the pen cap 3 loosens or even falls off, resulting in the needle losing protection or the injection device being accidentally touched, and enhancing the stability of the automatic injection device.

[0029] In one embodiment of the present application, one end of the coordination member 31 can be arranged on the closed end 321.

[0030] Specifically, the coordination member 31 can be fixed on the closed end 321 and extend out from the closed end 321 along the axial direction to the open end 322, so as to improve the reliability and stability of the coordination member 31, and enable the circumferential limiting member to limit the circumferential movement of the pen cap body 32, such as circumferential movement and rotation, by restricting the circumferential movement of the coordination member 31.

[0031] In another embodiment of the present application, one end of the coordination member 31 can also be arranged on the side wall of the pen cap body 32.

[0032] Specifically, the coordination member 31 can be connected and fixed to the side wall of the pen cap body 32, and further can restrict the circumferential movement of the pen cap body 32, such as circumferential movement and rotation, by restricting the circumferential movement of the coordination member 31, improving the reliability and stability.

[0033] In one embodiment of the present application, the coordination member 31 includes a convex plate, and the convex plate at least includes an arc-shaped plate, and the arc-shaped plate is used to cooperate with the outer wall of the protection sleeve 2 or the inner wall of the housing 1. The convex plate can be more easily inserted into the hollow cavity and is convenient for the circumferential limiting member to perform limiting.

[0034] Specifically, the coordination member 31 can include a rectangular convex plate protruding from the open end 322. The rectangular convex plate is inserted into the hollow cavity, and the circumferential limiting member can restrict the relative two side edges of the rectangular convex plate, thereby restricting the circumferential movement of the pen cap 3, improving convenience and simplifying the structure. Further, the convex plate can also include an arc-shaped plate with an arc, so as to facilitate axial movement along the inner wall of the housing 1 or the outer wall of the protection sleeve 2, and improve the smoothness of inserting the pen cap 3 into the housing 1.

[0035] In one embodiment of the present application, the pen cap 3 further includes a limiting stop 33. The limiting stop 33 is disposed on the pen cap body 32 and axially extends out of the open end 322 for cooperating with the protective sleeve 2 to limit the axial movement of the protective sleeve 2 after the pen cap 3 is inserted into the housing 1. The limiting stop 33 and the coordinating member 31 are spaced apart to avoid conflicts between the corresponding components of the limiting stop 33 and the coordinating member 31 on the inner wall of the housing 1. The protective sleeve 2 is provided with a engaging portion 23, and the inner wall of the housing 1 is provided with a clamping groove 12. When the pen cap 3 is inserted into the housing 1, the limiting stop 33 abuts against the engaging portion 23, so that the engaging portion 23 is stuck in the clamping groove 12 to limit the axial movement of the protective sleeve 2, preventing the automatic injection device from being accidentally triggered by the excessive impact caused by the accidental dropping of the automatic injection device, thereby improving the stability of the overall device.

[0036] Specifically, the engaging portion 23 radially protrudes from the side away from the axis and exposes from the position of the protective sleeve 2 corresponding to the clamping groove 12; the limiting stop 33 abuts against the side of the engaging portion 23 close to the axis, so that the engaging portion 23 is radially displaced in the direction away from the axis into the clamping groove 12, and the movement of the engaging portion 23 is restricted by the clamping groove 12, thereby restricting the movement of the protective sleeve 2, reducing the risk that the engaging head is disengaged from the clamping groove 12 due to the excessive impact caused by the accidental dropping of the automatic injection device, resulting in the failure of the automatic injection device being accidentally triggered, and improving the reliability and stability.

[0037] In one embodiment of the present application, the pen cap 3 is further symmetrically provided with two extension arms 34. Hooks 35 are provided at the ends of the extension arms 34 facing away from the pen cap body 32. The hooks 35 are detachably connected to the needle protection cap 4, so that when the pen cap 3 is pulled out of the housing 1, the hooks 35 are driven to bring out the needle protection cap 4, so that the needle can be exposed and inserted into the human body for injection. The extension arms 34 and the limiting stop 33 are circumferentially spaced apart along the pen cap 3 to improve the space utilization rate, simplify the structure, and reduce the cost.

[0038] Specifically, by providing the extension arms 34, the material consumption of the pen cap 3 can be reduced, the structure can be simplified, and the cost can be reduced. At the same time, the extension arms 34 extending into the protective sleeve 2 can reduce the occupation of the internal space of the protective sleeve 2, improve the space utilization rate, and reduce the risk of damaging other components when the pen cap 3 is pulled out.

[0039] In one embodiment of the present application, the circumferential limiting member includes two slide rails 11 and a groove 21. The two slide rails 11 are circumferentially spaced apart on the inner wall of the housing 1 and both extend in the direction of the axis for restricting the circumferential movement of the coordinating member 31. The groove 21 is disposed on the outer wall of the protective sleeve 2 for restricting the circumferential movement of the housing 1 and the coordinating member 31. The two slide rails 11 are clamped inside the groove 21 to form a hollow cavity with an opening, and the coordinating member 31 is detachably inserted into the hollow cavity.

[0040] Specifically, two slide rails 11 are snap-connected inside the groove 21. The groove 21 can limit the circumferential movement of the slide rails 11, and the circumferential limit of the slide rails 11 by the groove 21 realizes the circumferential limit of the housing 1. When the pen cap 3 is inserted into the housing 1, the coordination member 31 can be inserted into the hollow cavity through the opening along the slide rail 11, and the circumferential limit of the coordination member 31 is carried out through the hollow cavity, so as to limit the circumferential movement of the pen cap 3; when the pen cap 3 is pulled out of the housing 1, the coordination member 31 can slide out of the hollow cavity along the slide rail 11, realizing the detachable insertion of the coordination member 31, so as to facilitate the installation and disassembly of the pen cap 3.

[0041] In an embodiment of the present application, the two slide rails 11 respectively abut against the two side walls of the groove 21, and the side of the coordination member 31 abuts against the slide rail 11.

[0042] Specifically, the two slide rails 11 respectively abutting against the two side walls of the groove 21 can realize the circumferential limit of the slide rails 11, preventing the housing 1 from rotating circumferentially relative to the protective sleeve 2. Further, the circumferential limit of the coordination member 31 is realized by the two opposite sides of the coordination member 31 respectively abutting against the two slide rails 11, so as to limit the circumferential rotation of the pen cap 3 relative to the housing 1 and the protective sleeve 2.

[0043] In an embodiment of the present application, the number of the coordination members 31 and the grooves 21 is two and they are symmetrically arranged. The number of the slide rails 11 is four. Two slide rails 11 are in a group, and each group of slide rails 11 is correspondingly arranged with each coordination member 31 and the groove 21.

[0044] Specifically, by symmetrically arranging two coordination members 31, two grooves 21 and two groups of slide rails 11, the circumferential limit of the pen cap 3 can be further enhanced, and the stability can be improved.

[0045] In an embodiment of the present application, a through hole 22 is formed by surrounding one end of the barrel of the protective sleeve 2, and the groove 21 is located at the end close to the through hole 22.

[0046] Specifically, a through hole 22 is formed by surrounding one end of the barrel of the protective sleeve 2. Along the axial direction of the protective sleeve 2, the through hole 22 penetrates through the barrel of the protective sleeve 2 to reduce the material consumption of the protective sleeve 2, simplify the structure and reduce the production cost. The groove 21 is located at the end close to the through hole 22. On the one hand, it is convenient to form a hollow cavity with the slide rail 11; on the other hand, it can also avoid conflicts with other components and structures, improve the space utilization rate, simplify the structure and reduce the production cost.

[0047] In another embodiment of the present application, the two slide rails 11 can also be arranged at intervals on the outer wall of the protective sleeve 2 in the circumferential direction and both extend along the axial direction. Correspondingly, the groove 21 can also be arranged on the inner wall of the housing 1 to cooperate with the two slide rails 11 to form a hollow cavity with an opening, so that the coordination member 31 can be detachably inserted into the hollow cavity to facilitate the installation and removal of the pen cap 3. Further, the hollow cavity can circumferentially limit the coordination member 31, thereby restricting the circumferential rotation of the pen cap 3 relative to the housing 1 and the protective sleeve 2.

[0048] Further, the slide rail 11 is arranged at one end of the protective sleeve 2 close to the through hole 22, which can facilitate the formation of a hollow cavity with the groove 21, improve the space utilization rate, simplify the structure, and reduce the production cost.

[0049] On the other hand, the present application also provides an automatic injection device, which includes the above-mentioned housing assembly. Specifically, since the automatic injection device includes the housing assembly described in the above embodiment, it also has the beneficial effects of the above housing assembly, which will not be elaborated here.

[0050] In the present application, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0051] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0052] The above is only the implementation mode of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, is equally included in the patent protection scope of the present application.

Claims

1. A housing assembly of an automatic injection device, characterized in that: include: A shell (1) and a protective sleeve (2), wherein the shell (1) is sleeved on the outer circumference of the protective sleeve (2), and a circumferential limiter is provided on the inner wall of the shell (1) and / or the outer wall of the protective sleeve (2); A pen cap (3) is arranged at one end of the housing (1) and is used to protect the automatic injection device. A positioning member (31) extending along the axial direction is arranged at one end of the pen cap (3). The positioning member (31) is used to cooperate with the circumferential limiting member to limit the circumferential movement of the pen cap (3).

2. The housing assembly of the automatic injection device according to claim 1, characterized in that: The pen cap (3) comprises: The pen cap body (32) comprises a closed end (321) and an open end (322); the positioning member (31) is located at the open end (322) and extends out of the open end (322).

3. The housing assembly of the automatic injection device according to claim 2, characterized in that: One end of the positioning member (31) is arranged on the closed end (321); or, one end of the positioning member (31) is arranged on the side wall of the pen cap body (32).

4. The housing assembly of the automatic injection device according to claim 1, characterized in that: The matching piece (31) comprises a convex plate, and the convex plate comprises at least an arc-shaped plate, and the arc-shaped plate is used to cooperate with the outer wall of the protective sleeve (2) or the inner wall of the shell (1).

5. The housing assembly of the automatic injection device according to claim 2, characterized in that: The pen cap (3) further comprises a limit stopper (33), wherein the limit stopper (33) is arranged on the pen cap body (32) and extends out of the opening end (322) along the axial direction, and the limit stopper (33) is arranged at a distance from the matching member (31); The protective sleeve (2) is provided with a snap-fitting portion (23), and the inner wall of the housing (1) is provided with a snap-fitting groove (12); when the pen cap (3) is inserted into the housing (1), the limit stopper (33) abuts against the snap-fitting portion (23) so that the snap-fitting portion (23) is stuck in the snap-fitting groove (12) to limit the movement of the protective sleeve (2).

6. The housing assembly of the automatic injection device according to claim 5, characterized in that: The pen cap (3) is further symmetrically provided with two extension arms (34); a hook (35) is provided at one end of the extension arm (34) away from the pen cap body (32); the hook (35) is used for detaching the needle protection cap (4); the extension arm (34) and the limit stopper (33) are arranged at intervals along the circumference of the pen cap (3).

7. The housing assembly of the automatic injection device according to claim 1, characterized in that: The circumferential limiter comprises: Two slide rails (11), the two slide rails (11) are arranged at intervals along the circumferential direction on one of the inner wall of the housing (1) or the outer wall of the protective sleeve (2), and both extend in the axial direction; A groove (21) is provided on the other of the outer wall of the protective sleeve (2) or the inner wall of the housing (1); The two slide rails (11) are clamped inside the groove (21) to form a hollow cavity with an opening, and the matching piece (31) can be detachably inserted into the hollow cavity.

8. The housing assembly of the automatic injection device according to claim 7, characterized in that: The two slide rails (11) respectively abut against two side walls of the groove (21), and the side edge of the matching member (31) abuts against the slide rail (11).

9. The housing assembly of the automatic injection device according to claim 7, characterized in that: A through hole (22) is formed around one end of the body of the protective sleeve (2), and the groove (21) or the slide rail (11) is located at an end close to the through hole (22).

10. An automatic injection device, characterized in that: A housing assembly comprising the automatic injection device according to any one of claims 1 to 9.

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