Needle cap assembly for injection device

Abstract

The utility model provides a needle protective cap assembly for an injection device, and belongs to the technical field of injection equipment. The device comprises an end cover, and a needle protective cap pulling sleeve is arranged in the end cover and can pull out a needle protective cap synchronously to enable the needle protective cap to be separated from an injector when the end cover is separated from an injection device in the axial direction. When the end cover is taken down, the needle protective cap can be synchronously pulled out from the injector, so that the operation of additionally taking down the needle protective cap is not needed, the previous steps of using the injection device are reduced, and the operation is more convenient; the operation of taking down the needle protective cap is time-saving and labor-saving, and the safety risk is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection equipment and relates to a needle protective cap assembly for an injection device. Background Art

[0002] In the medical system, injection devices have been widely used, and are more suitable for self-injection by patients in non-medical occasions such as home. Whether in medical or other non-medical occasions, the syringe needle in the injection device of the prior art is generally provided with a needle cap to prevent the needle from being contaminated and play a protective role. When using the injection device, it is necessary to first remove the protective end cover, and then remove the needle cap from the syringe needle. There are many operation steps before the injection, and because the needle cap is generally set tightly, it takes a lot of force to remove it, and there is a risk of scratching the palm with the needle if you are not careful.

[0003] There are also needle shield assemblies for injection devices in the prior art, but the needle shield assemblies in the prior art are inconvenient to insert and remove, or even if they can be inserted and removed, they need to be positioned before installation can be completed, or there are parts of the needle shield assemblies that are positioned or fixed unstably after installation, or the fixing is inconvenient, causing them to deviate to one side, which is not conducive to overall use. Utility Model Content

[0004] The utility model aims to solve the above problems and provides a needle shield assembly for an injection device.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A needle guard cap assembly for an injection device comprises an end cap, wherein a needle guard cap removal sleeve is arranged inside the end cap and can synchronously remove the needle guard cap to separate it from the syringe when the end cap axially separates from the injection device.

[0007] The end cover and the needle cap play the role of protecting the syringe in the injection device. When the end cover is removed, the needle cap removal sleeve inside the end cover can simultaneously pull out the needle cap, and there is no need to perform additional operations to remove the needle cap, making the operation of removing the needle cap more time-saving and labor-saving, avoiding safety risks, and reducing the preliminary steps of using the injection device, making the operation more convenient and improving the injection efficiency.

[0008] In at least one of the needle shield cap components for injection devices, a needle shield cap connection structure is provided on the inner wall of the needle shield cap removal sleeve.

[0009] The needle cap removal sleeve is connected to the needle cap through a needle cap connection structure arranged on the wall body. When the needle cap removal sleeve moves axially with the end cover, it can drive the needle cap connected thereto to move axially, so that the needle cap is synchronously separated from the syringe.

[0010] In at least one of the above-mentioned needle shield cap assemblies for injection devices, the needle shield cap connection structure includes a plurality of paddles arranged on the inner wall of the needle shield cap removal sleeve and distributed circumferentially along the wall of the needle shield cap removal sleeve, and the lower ends of the paddles are connected to the needle shield cap and gradually tilt inward from the upper end to the lower end.

[0011] The paddle is gradually inclined inward from the upper end to the lower end and is arranged on the wall of the needle guard cap removal sleeve. The lower end of the paddle, that is, the free end, is inclined against the outer wall of the needle guard cap. When the needle guard cap removal sleeve moves axially with the end cover, the lower end of the paddle can exert an axial component force on the needle guard cap to pull out the needle guard cap.

[0012] In at least one of the needle shielding cap assemblies for injection devices, a plurality of removal protrusions distributed along the axial direction are provided on the outer wall of the needle shielding cap.

[0013] The removal protrusion on the outer wall of the needle guard cap is used in conjunction with the paddle on the wall of the needle guard cap removal sleeve. The removal protrusion can increase the contact area with the lower end of the paddle. When the paddle moves axially, the lower end of the paddle rests on the lower bottom surface of the removal protrusion to apply an axial component of force to the removal protrusion. The operator only needs to apply slight force to remove the needle guard cap from the syringe. It is simple and labor-saving to use.

[0014] In at least one of the needle shield cap assemblies for injection devices, the free end of the paddle is provided with at least one group of bifurcated forks, and the bifurcated ends of the forks are respectively in contact with the extraction protrusions, thereby ensuring that at least one position of each bifurcated end can contact one extraction protrusion, and more forks increase the contact points of the extraction protrusions, so that the needle shield cap can be more firmly set at a predetermined position; and the forks on the circumferentially arranged paddle can ensure that the needle shield cap can be abutted and fixed by the bifurcated forks on the paddle no matter where it is rotated to;

[0015] Therefore, the bifurcated fork body arranged along the circumference of the needle cap removal sleeve can also solve the problem in the prior art that "the positioning or fixation of the needle cover assembly after installation is unstable or the fixation is inconvenient, causing it to deviate to one side and is not conducive to overall use".

[0016] Of course, the bifurcated fork body can also increase the friction between the needle guard cap and the needle guard cap when the needle guard cap removal sleeve is axially disengaged outward, thereby increasing the force on the needle guard cap and facilitating the axial disengagement of the needle guard cap.

[0017] In at least one of the needle shield cap assemblies for injection devices, the needle shield cap removal sleeve is fixedly connected to the end cover via a removal sleeve positioning seat on the end cover, and a detachable fixing structure is provided between the removal sleeve positioning seat and the needle shield cap removal sleeve.

[0018] The needle cap removal sleeve is connected to the end cover through a removal sleeve positioning seat, and the removal sleeve positioning seat and the needle cap removal sleeve are connected through a detachable fixing structure, so that disassembly and assembly are convenient.

[0019] In at least one of the above-mentioned needle shield cap assemblies for injection devices, the detachable fixing structure includes hooks arranged on both sides of the removal sleeve positioning seat, and the needle shield cap removal sleeve is provided with a bayonet that can cooperate with the hooks, or the detachable fixing structure includes a slot arranged on the removal sleeve positioning seat, and the needle shield cap removal sleeve is provided with a snap ring that can cooperate with the slot.

[0020] The bayonet holes on both sides of the needle guard cap removal sleeve can be snap-fitted with the hooks on at least one side of the removal sleeve positioning seat to form a fixed connection, which is convenient for disassembly and assembly.

[0021] In at least one of the above-mentioned needle shield cap assemblies for injection devices, the end cover comprises a cover plate and a cover sleeve, the removal sleeve positioning seat is arranged on the cover plate or inside the cover sleeve, the cover sleeve is integrally connected to one end of the cover plate, and a snap structure capable of being connected to the injection device is provided at the other end of the cover sleeve.

[0022] The other end of the cover sleeve is connected to the injection device through a snap-fit ​​structure, the end cover is firmly installed and not easy to fall off, and the end cover is easy to disassemble and assemble.

[0023] In at least one of the needle shielding cap assemblies for injection devices, a plurality of vent holes are provided on the end cover.

[0024] The vent holes provided on the end cover play a role in ventilation inside and outside the end cover, preventing excessive air pressure inside the end cover, which would make it difficult for the end cover to detach axially.

[0025] Compared with the existing technology, the advantages of the utility model are: 1. The needle cap can be pulled out from the syringe simultaneously when the end cover is removed, and no additional operation of removing the needle cap is required, which reduces the early steps of using the injection device and is more convenient to operate. 2. Removing the needle cap saves time and effort and avoids safety risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure provided by the utility model;

[0027] Figure 2 It is a cross-sectional view provided by the utility model;

[0028] Figure 3 It is a broken cross-sectional view provided by the utility model;

[0029] Figure 4 It is a schematic diagram of the structure when the needle guard cap removal sleeve is connected to the needle guard cap;

[0030] Figure 5 1. It is a schematic diagram of the structure of the needle cap removal sleeve;

[0031] Figure 6 is a schematic diagram of the structure of the needle guard cap;

[0032] Figure 7 It is a schematic diagram of the structure of the bottom of the end cover;

[0033] Figure 8 yes Figure 2 A schematic diagram of a structure in which the remaining components are removed;

[0034] Fig. 9 yes Figure 8 A schematic diagram of a structure in which the remaining components are removed;

[0035] Fig.10 This is the connection method between the needle cap removal sleeve and the end cover in the second embodiment.

[0036] In the figure, the end cover 1, the needle guard cap 2, the syringe 3, the needle guard cap removal sleeve 4, the needle guard cap connecting structure 5, the paddle 6, the removal protrusion 7, the fork body 9, the removal sleeve positioning seat 10, the detachable fixing structure 11, the hook 12, the bayonet 13, the cover plate 14, the cover sleeve 15, the vent 16, the slot 17, the snap ring 18, and the buckle structure 19. DETAILED DESCRIPTION

[0037] Embodiment 1

[0038] like Figure 1-Figure 8 As shown, a needle shield assembly for an injection device comprises an end cover 1, wherein the end cover 1 is provided with a needle shield removal sleeve 4 which can simultaneously remove the needle shield 2 and separate it from the syringe 3 when the end cover 1 axially separates from the injection device.

[0039] In the utility model, the needle guard cap 2 is sleeved on the syringe 3. When the end cover 1 needs to be axially removed from the injection device using the injection device, the needle guard cap removal sleeve 4 in the end cover 1 can synchronously pull the needle guard cap 2 out of the syringe 3 to separate the needle guard cap 2 from the syringe 3.

[0040] The end cover 1 and the needle cap 2 play the role of protecting the syringe 3 in the injection device. When the end cover 1 is removed, the needle cap removal sleeve 4 in the end cover 1 can simultaneously pull out the needle cap 2, and there is no need to perform an additional operation to remove the needle cap 2, making the operation of removing the needle cap 2 more time-saving and labor-saving, avoiding safety risks, and reducing the preliminary steps of using the injection device, making the operation more convenient and improving the injection efficiency.

[0041] Specifically, combined with Figure 2-Figure 5 As shown, a needle guard cap connecting structure 5 is provided on the inner wall of the needle guard cap removal sleeve 4 .

[0042] The needle cap removal sleeve 4 is connected to the needle cap 2 via a needle cap connecting structure 5 arranged on the inner wall. When the needle cap removal sleeve 4 moves axially with the end cover 1, it can drive the needle cap 2 connected thereto to move axially, so that the needle cap 2 is synchronously separated from the syringe 3.

[0043] Specifically, combined with Figure 2-Figure 6 As shown, the needle guard cap connection structure 5 includes a plurality of paddles 6 arranged on the inner wall of the needle guard cap removal sleeve 4 and evenly distributed along the circumference of the needle guard cap removal sleeve 4. The lower end of the paddle 6 is connected to the needle guard cap 2 and gradually tilts inward from the upper end to the lower end.

[0044] The paddle 6 is gradually inclined inward from the upper end to the lower end and is arranged on the inner wall of the needle guard cap removal sleeve 4. The lower end of the paddle 6 is inclined and rests on the outer wall of the needle guard cap 2. When the needle guard cap removal sleeve 4 moves axially with the end cover 1, the lower end of the paddle 6 can apply an axial component force to the needle guard cap 2 to pull out the needle guard cap 2.

[0045] Specifically, combined with Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 8 As shown, the outer wall of the needle protection cap 2 is provided with a plurality of removal protrusions 7 distributed along the axial direction.

[0046] The removal protrusion 7 on the outer wall of the needle guard cap 2 is used in conjunction with the paddle 6 on the inner wall of the needle guard cap removal sleeve 4. The removal protrusion 7 can increase the contact area with the lower end of the paddle 6. When the paddle 6 moves axially, the lower end of the paddle 6 abuts against the lower bottom surface of the removal protrusion 7 to apply an axial component of force to the removal protrusion 7. The operator only needs to apply slight force to remove the needle guard cap 2 from the syringe 3. It is simple and labor-saving to use.

[0047] Specifically, combined with Figure 3 , Figure 4 , Figure 5 and Figure 7 As shown, the free end of the paddle (6) is provided with at least one group of forked fork bodies (9).

[0048] The forked ends of the fork body 9 are respectively in contact with the removal protrusion 7 to ensure that at least one position of each fork end can contact a removal protrusion 7, and more fork bodies 9 increase the contact points of the removal protrusion 7, so that the needle guard can be more firmly set at the predetermined position; and the fork bodies 9 on the circumferentially arranged paddle 6 can ensure that the needle guard can be abutted and fixed by the forked fork bodies on the paddle 6 no matter what position the needle guard is rotated to.

[0049] Specifically, combined with Figure 2 , Figure 3 , Figure 7 and Figure 8 As shown, the needle cap removal sleeve 4 is fixedly connected to the end cover 1 through a removal sleeve positioning seat 10 , and a detachable fixing structure 11 is provided between the removal sleeve positioning seat 10 and the needle cap removal sleeve 4 .

[0050] The needle cap removal sleeve 4 is connected to the end cover 1 through a removal sleeve positioning seat 10. The removal sleeve positioning seat 10 and the needle cap removal sleeve 4 are connected through a detachable fixing structure 11, which is convenient for disassembly and assembly.

[0051] Specifically, combined with Figure 2 , Figure 7 and Figure 8 As shown, the detachable fixing structure 11 includes a hook 12 arranged on at least one side of the removal sleeve positioning seat 10, and the needle cap removal sleeve 4 is provided with a bayonet 13 that can cooperate with the hook 12.

[0052] The bayonet holes 13 on both sides of the needle cap removal sleeve 4 can be snap-fitted with the hooks 12 on both sides of the removal sleeve positioning seat 10 to form a fixed connection, which is convenient for disassembly and assembly.

[0053] Specifically, combined with Figure 2 , Figure 7 and Figure 8 As shown, the end cover 1 includes a cover plate 14 and a cover sleeve 15, the removal sleeve positioning seat 10 is arranged on the cover plate 14 or inside the cover sleeve (15), the cover sleeve 15 is connected to one end of the cover plate 14 as a whole, and a snap structure 19 that can be connected to the injection device is provided at the other end of the cover sleeve 15.

[0054] The other end of the cover sleeve 15 is connected to the injection device via a snap-fit ​​structure 19 , so that the end cover 1 is firmly installed and not easy to fall off, and the end cover 1 is convenient to assemble and disassemble.

[0055] Specifically, combined with Figure 2 , Figure 3 , Figure 7 and Figure 8 As shown, a plurality of vent holes 16 are provided on the end cover 1.

[0056] The vent hole 16 provided on the end cover 1 plays a role in ventilation inside and outside the end cover 1, thereby preventing excessive air pressure inside the end cover 1, which would make it difficult for the end cover to detach axially.

[0057] The working principle of the utility model is as follows: the needle guard cap 2 is sleeved on the syringe 3, and when the end cover 1 needs to be axially removed from the injection device using the injection device, the needle guard cap removal sleeve 4 in the end cover 1 can synchronously pull the needle guard cap 2 out of the syringe 3 to separate the needle guard cap 2 from the syringe 3;

[0058] The end cover 1 and the needle cap 2 play a role in protecting the syringe 3 in the injection device. When the end cover 1 is removed, the needle cap removal sleeve 4 in the end cover 1 can simultaneously remove the needle cap 2, and there is no need to perform an additional operation to remove the needle cap 2, which makes the operation of removing the needle cap 2 more time-saving and labor-saving, avoids safety risks, and reduces the early steps of using the injection device, making the operation more convenient and improving the injection efficiency;

[0059] The needle cap removal sleeve 4 is connected to the needle cap 2 via a needle cap connection structure 5 provided on the inner wall. When the needle cap removal sleeve 4 moves axially along with the end cover 1, it can drive the needle cap 2 connected thereto to move axially, so that the needle cap 2 is synchronously separated from the syringe 3.

[0060] The paddle 6 is gradually inclined inward from the upper end to the lower end and is arranged on the inner wall of the needle guard cap removal sleeve 4. The lower end of the paddle 6 is inclined against the outer wall of the needle guard cap 2. When the needle guard cap removal sleeve 4 moves axially with the end cover 1, the lower end of the paddle 6 can exert an axial component force on the needle guard cap 2 to remove the needle guard cap 2.

[0061] The removal protrusion 7 on the outer wall of the needle guard cap 2 cooperates with the paddle 6 on the inner wall of the needle guard cap removal sleeve 4. The removal protrusion 7 can increase the contact area with the lower end of the paddle 6. When the paddle 6 moves axially, the lower end of the paddle 6 abuts against the lower bottom surface of the removal protrusion 7 to apply an axial component of force to the removal protrusion 7. The operator only needs to exert a slight force to remove the needle guard cap 2 from the syringe 3. It is simple and labor-saving to use.

[0062] The fork body 9 can increase the friction between the needle guard cap 2 and the needle guard cap 2 when the needle guard cap removal sleeve 4 is axially disengaged outward, increase the force on the needle guard cap 2, and facilitate the axial disengagement of the needle guard cap 2; each fork end of the fork body 9 contacts the removal protrusion 7 respectively, thereby ensuring that at least one position of each fork end can contact a removal protrusion 7, and more fork bodies 9 increase the contact points of the removal protrusion 7, so that the needle guard cap can be more firmly set at the predetermined position; and the fork bodies 9 on the circumferentially arranged paddle 6 can ensure that the needle guard cap can be abutted and fixed by the forked fork bodies on the paddle 6 no matter what position it is rotated to;

[0063] The bayonet holes 13 on both sides of the needle cap removal sleeve 4 can be snap-fitted with the hooks 12 on both sides of the removal sleeve positioning seat 10 to form a fixed connection, which is convenient for disassembly and assembly;

[0064] The other end of the cover sleeve 15 is connected to the injection device through a buckle structure, the end cover 1 is firmly installed and not easy to fall off, and the end cover 1 is easy to disassemble and assemble;

[0065] The vent hole 16 provided on the end cover 1 plays a role in ventilation inside and outside the end cover 1, thereby preventing excessive air pressure inside the end cover 1, which would make it difficult for the end cover to detach axially.

[0066] Embodiment 2

[0067] like Fig. 9 and Fig.10 As shown, the detachable fixing structure 11 can also be in the following form, which includes a clamping groove 17 arranged on the removal sleeve positioning seat 10, and a clamping ring 18 capable of cooperating with the clamping groove 17 is provided on the needle guard cap removal sleeve 4. This method can be more optimal.

[0068] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0069] Although this article uses the end cover 1, needle guard cap 2, syringe 3, needle guard cap removal sleeve 4, needle guard cap connecting structure 5, paddle 6, removal protrusion 7, fork body 9, removal sleeve positioning seat 10, detachable fixing structure 11, hook 12, bayonet 13, cover plate 14, cover sleeve 15, vent 16, slot 17, snap ring 18, buckle structure 19 and the like more frequently, these terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A needle shield assembly for an injection device, comprising an end cap (1), characterized in that: The end cover (1) is provided with a needle cap removal sleeve (4) which can simultaneously remove the needle cap (2) and separate it from the syringe (3) when the end cover (1) is axially separated from the injection device; a needle cap connection structure (5) is provided on the inner wall of the needle cap removal sleeve (4); the needle cap connection structure (5) comprises a plurality of paddles (6) arranged on the inner wall of the needle cap removal sleeve (4) and distributed along the circumferential direction of the wall of the needle cap removal sleeve (4); the lower end of the paddle (6) is connected to the needle cap (2) and gradually tilts inward from the upper end to the lower end; a plurality of axially distributed removal protrusions (7) are provided on the outer wall of the needle cap (2); and the free end of the paddle (6) is provided with at least one group of bifurcated forks (9).

2. The needle shield assembly for an injection device according to claim 1, characterized in that: The needle cap removal sleeve (4) is fixedly connected to the end cover (1) via a removal sleeve positioning seat (10) on the end cover (1), and a detachable fixing structure (11) is provided between the removal sleeve positioning seat (10) and the needle cap removal sleeve (4).

3. The needle shield assembly for an injection device according to claim 2, characterized in that: The detachable fixing structure (11) comprises a hook (12) arranged on at least one side of the removal sleeve positioning seat (10), and the needle guard cap removal sleeve (4) is provided with a bayonet (13) capable of cooperating with the hook (12), or the detachable fixing structure (11) comprises a slot (17) arranged on the removal sleeve positioning seat (10), and the needle guard cap removal sleeve (4) is provided with a snap ring (18) capable of cooperating with the slot (17).

4. The needle shield assembly for an injection device according to claim 2, characterized in that: The end cover (1) comprises a cover plate (14) and a cover sleeve (15); the removal sleeve positioning seat (10) is arranged on the cover plate (14) or on the inner side of the cover sleeve (15); the cover sleeve (15) is integrally connected to one end of the cover plate (14); and a buckle structure (19) capable of being connected to an injection device is provided at the other end of the cover sleeve (15).

5. The needle shield assembly for an injection device according to claim 1, characterized in that: The end cover (1) is provided with a plurality of ventilation holes (16).

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