Assembling and disassembling method of injection needle assembly, injection pen cap and injection pen

Abstract

The invention provides an assembling and disassembling method of an injection needle assembly, an injection pen cap and an injection pen, the injection pen cap is detachably connected to an injection pen body and can rotate relative to the injection pen body, the injection pen cap comprises a pen cap body, and the front end of the pen cap body is provided with a limiting cavity used for installing the injection needle assembly; when the injection needle assembly is installed in the limiting cavity, the pen cap body can rotate to drive a needle base of the injection needle assembly to be connected to or separated from the front end of the injection pen body. When the needle base is connected to the front end of the injection pen body, the pen cap body can drive the outer needle cap of the injection needle assembly to be separated from the needle base of the injection needle assembly when being pulled down from the injection pen body, or the pen cap body can drive the outer needle cap of the injection needle assembly to be embraced on the needle base of the injection needle assembly again when being buckled on the injection pen body. A user can be prevented from being punctured, and the safety performance of the injection needle assembly in the using process is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of automatic injection, and particularly relates to a method for loading and unloading an injection needle assembly, an injection pen cap, and an injection pen. Background Art

[0002] An insulin pen is a common insulin injection device. For example, a needle is provided at the front end of the insulin pen, and a cap is provided on the needle to cover it. Currently, the vast majority of patients choose to use reusable insulin pens. Reusable insulin pens can be reused. After the pen refill is used up, the pen refill can be replaced and reused. Insulin pens can be used for many years, or even for life.

[0003] Currently, the specific steps for using an insulin pen are as follows: 1. Remove the pen cap; 2. Unscrew the pen refill holder; 3. Retract the piston rod; 4. Install the pen refill (insert it into the pen refill holder); 5. Install the pen refill holder onto the injection pen body; 6. Install the needle; 7. Remove the outer needle cap and inner needle cap of the needle; among the above steps, the step of removing the inner needle cap is the most dangerous. The inner needle cap is next to the needle, and the volume of the inner needle cap is very small, so it is easy to stab the user. At the same time, when installing the injection needle assembly, it is easy to knock off the needle cap and stab the user. Similarly, when it needs to be replaced after use, an accident of stabbing the user's hand is likely to occur during the process of removing the needle. Summary of the Invention

[0004] Aiming at the problems existing in the above background art introduction, the purpose of the present invention is to provide a method for loading and unloading an injection needle assembly, an injection pen cap, and an injection pen with good safety performance and convenient use.

[0005] The technical solution adopted by the present invention is:

[0006] An injection pen cap is detachably connected to the injection pen body and can rotate relative to the injection pen body. It includes a pen cap body. A limiting cavity for installing an injection needle assembly is provided at the front end of the pen cap body. When the injection needle assembly is installed in the limiting cavity, the pen cap body can rotate to drive the needle seat of the injection needle assembly to connect to or separate from the front end of the injection pen body; when the needle seat is connected to the front end of the injection pen body, the pen cap body can drive the outer needle cap of the injection needle assembly to disengage from the needle seat of the injection needle assembly when being pulled off from the injection pen body, or the pen cap body can drive the outer needle cap of the injection needle assembly to re-embrace the needle seat of the injection needle assembly when being snapped onto the injection pen body.

[0007] Further, a pen cap lid for opening or closing the limiting cavity is provided at the position of the pen cap body where the limiting cavity is located.

[0008] Further, one side of the pen cap lid is hinged to the pen cap body, and the other side is snap-connected to the pen cap body.

[0009] Further, a groove for manually opening the pen cap is provided on the pen cap body on the fastening side.

[0010] Further, a mark for prompting the rotation connection direction is provided on the pen cap.

[0011] Further, the structural shape of the limiting cavity is consistent with the outer surface of the outer needle cap of the injection needle assembly and can cooperate with the outer needle cap to limit the rotation of the outer needle cap.

[0012] Further, the rear end face of the limiting cavity cooperates with the end face of the outer needle cap to axially limit the outer needle cap.

[0013] An injection pen includes an injection pen body, and the above-mentioned injection pen cap is detachably installed on the injection pen body. The injection pen cap can detachably connect the injection needle assembly to the injection pen body.

[0014] A method for loading and unloading an injection needle assembly includes the above-mentioned injection pen, and the specific steps are as follows:

[0015] S1. Pull the injection pen cap off the injection pen body, open the pen cap, place the injection needle assembly into the limiting cavity and cover the pen cap.

[0016] S2. Snap the injection pen cap with the injection needle assembly onto the injection pen body, and rotate and tighten the injection pen cap according to the mark. At this time, the needle seat of the injection needle assembly is connected to the front end of the injection pen body.

[0017] S3. Pull the injection pen cap off the injection pen body. At this time, the injection pen cap drives the outer needle cap of the injection needle assembly to disengage from the needle seat.

[0018] S4. Remove the inner needle cap from the needle seat to administer the drug to the injection pen body. After the drug administration is completed, snap the injection pen cap with the outer needle cap back onto the injection pen body, and rotate and loosen the injection pen cap according to the mark. At this time, the needle seat with the injection needle disengages from the front end of the injection pen body and is re-encircled by the outer needle cap.

[0019] S5. Pull the injection pen cap off the injection pen body. At this time, the injection pen cap drives the injection needle assembly without the inner needle cap away from the injection pen body.

[0020] S6. Open the pen cap, take out the injection needle assembly without the inner needle cap and cover the pen cap, then snap the injection pen cap into the injection pen body for the next use.

[0021] Further, the needle seat of the injection needle assembly is threadedly connected to the front end of the injection pen body.

[0022] Compared with the prior art, the significant advantages of the present invention include: the injection pen cap not only plays a role in dust prevention but also serves as a means for loading and unloading the injection needle assembly. The injection needle is not contacted during the entire process of loading and unloading the injection needle assembly, thereby preventing the user or handler from being pricked and improving the safety performance during the use of the injection needle assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural view of the injection pen cap of the present invention;

[0024] Figure 2 is a schematic structural view after the pen cap lid of the present invention is opened;

[0025] Figure 3 is Figure 2 a schematic cross-sectional structural view of

[0026] Figure 4 is a schematic structural view of the injection pen cap of the present invention with an injection needle assembly installed therein;

[0027] Figure 5 is a schematic structural view of the injection pen of the present invention;

[0028] Figure 6 is a schematic structural view of the injection pen of the present invention after the pen cap is removed;

[0029] Figure 7 is a schematic installation process view of the injection needle assembly of the present invention;

[0030] Figure 8 is a schematic removal process view of the injection needle assembly of the present invention.

[0031] Among them, 1, injection pen cap; 11, pen cap body; 12, limiting cavity; 121, concave strip; 122, rear end face; 13, pen cap lid; 14, groove; 15, mark; 16, fastener; 17, fastening opening; 2, injection needle assembly; 21, needle seat; 22, outer needle cap; 3, injection pen main body. DETAILED DESCRIPTION OF THE INVENTION

[0032] The present invention will be further described below in conjunction with specific embodiments, but the present invention is not limited to these specific embodiments. Those skilled in the art should recognize that the present invention covers all alternative solutions, improvement solutions, and equivalent solutions that may be included within the scope of the claims.

[0033] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present invention, unless otherwise clearly specified and limited, the fact that the first feature is "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the fact that the first feature is "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The fact that the first feature is "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0036] Embodiment 1

[0037] See Figures 1-4, this embodiment provides an injection pen cap 1, which is detachably connected to the injection pen body and can rotate relative to the injection pen body. It includes a pen cap body 11, and a limiting cavity 12 for installing the injection needle assembly 2 is provided at the front end of the pen cap body 11. When the injection needle assembly 2 is installed in the limiting cavity 12, the pen cap body 11 can rotate to drive the needle seat of the injection needle assembly 2 to connect to or leave the front end of the injection pen body; when the needle seat is connected to the front end of the injection pen body, when the pen cap body 11 is pulled off from the injection pen body, it can drive the outer needle cap of the injection needle assembly 2 to disengage from the needle seat of the injection needle assembly 2, or when the pen cap body 11 is buckled to the injection pen body, it can drive the outer needle cap of the injection needle assembly 2 to re-embrace the needle seat of the injection needle assembly 2.

[0038] A pen cap lid 13 for opening or closing the limiting cavity 12 is provided at the position of the pen cap body 11 where the limiting cavity 12 is located. One side of the pen cap lid 13 is hinged to the pen cap body 11, and the other side is buckled and connected to the pen cap body 11. Specifically, a fastener 16 is provided on the pen cap lid 13, and a buckle 17 is provided at the position of the pen cap body 11 corresponding to the fastener 16, and the fastener 16 and the buckle 17 are cooperatively buckled. A groove 14 for manually opening the pen cap lid 13 is provided on the pen cap body 11 at the buckling side. Specifically, the shape of the groove 14 is similar to the shape of the front end of the thumb, which is convenient for buckling the pen cap lid 13 to disengage the fastener 16 from the buckle 17, thereby opening the pen cap lid 13. A mark 15 for indicating the rotation connection direction is provided on the pen cap lid 13. Specifically, the mark 15 can be pasted on the surface of the pen cap lid 13 or engraved on the pen cap lid 13.

[0039] The structural shape of the limiting cavity 12 in this embodiment is consistent with the outer surface structural shape of the outer needle cap of the injection needle assembly 2 and can cooperate with the outer needle cap to limit the rotation of the outer needle cap. Specifically, protruding ribs are provided on the surface of the outer needle cap, and concave strips 121 for cooperating with the ribs to limit rotation are provided on the inner wall surface of the limiting cavity 12. The shapes of the ribs and the concave strips 121 are the same, and the concave strips can wrap around the ribs, so that the limiting cavity 12 embraces the outer needle cap, thereby restricting the rotation of the outer needle cap. The rear end face 122 of the limiting cavity 12 cooperates with the end face of the outer needle cap to axially limit the outer needle cap, and the axial movement of the outer needle cap is restricted through the end face cooperation, so that the pen cap body 11 can remove the outer needle cap from the needle seat when pulled off.

[0040] The injection pen cap of the present invention not only plays a dust-proof role but also plays a role in loading and unloading the injection needle assembly 2. The injection needle assembly 2 is loaded and unloaded without contacting the injection needle throughout the process, thereby preventing the user or handler from being pricked and improving the safety performance during the use of the injection needle assembly 2.

[0041] Embodiment Two

[0042] See Figure 5 , Figure 6, this embodiment provides an injection pen, including an injection pen body 3. The injection pen cap 1 described in the first embodiment is detachably installed on the injection pen body 3, and the injection pen cap 1 enables the injection pen assembly 2 to be detachably connected to the injection pen body 3.

[0043] In the initial state, the injection needle assembly 2 is not installed on the injection pen body 3. When in use, the injection pen assembly 2 is connected to the injection pen body 3 through the injection pen cap 1. After use, the injection pen assembly 2 without the inner needle cap is removed through the injection pen cap 1.

[0044] The structure and function of the injection pen cap 1 can be referred to those described in the first embodiment.

[0045] Embodiment Three

[0046] See Figure 7 、 Figure 8 , a method for loading and unloading an injection needle assembly in this embodiment, including the injection pen described in the second embodiment, and its specific steps are as follows:

[0047] S1. Pull the injection pen cap 1 off the injection pen body 3, open the pen cap lid 13, place the injection needle assembly 2 into the limiting cavity 12 and cover the pen cap lid 13;

[0048] S2. Snap the injection pen cap 1 with the injection needle assembly 2 installed onto the injection pen body 3, and rotate and tighten the injection pen cap 1 according to the mark 15. At this time, the needle seat 21 of the injection needle assembly 2 is connected to the front end of the injection pen body 3;

[0049] S3. Pull the injection pen cap 1 off the injection pen body 3. At this time, the injection pen cap 1 drives the outer needle cap 22 of the injection needle assembly 2 to disengage from the needle seat 21; that is, the outer needle cap 22 remains in the limiting cavity 12 of the injection pen cap 1;

[0050] S4. Remove the inner needle cap (not shown in the figure) from the needle seat 21 to administer the drug with the injection pen body 3. After the drug administration is completed, snap the injection pen cap 1 with the outer needle cap 22 back onto the injection pen body 3, and rotate and loosen the injection pen cap 1 according to the mark 15. At this time, the needle seat 21 with the injection needle is disengaged from the front end of the injection pen body 3 and is re-encircled by the outer needle cap 22;

[0051] S5. Pull the injection pen cap 1 off the injection pen body 3. At this time, the injection pen cap 1 drives the injection needle assembly 2 without the inner needle cap away from the injection pen body 3;

[0052] S6. Open the pen cap lid 13, take out the injection needle assembly 2 without the inner needle cap and then cover the pen cap lid 13, and then snap the injection pen cap 1 into the injection pen body 3 for the next use. The inner needle cap and the used injection needle assembly 2 without the inner needle cap can be thrown into the designated trash bin.

[0053] The needle seat 21 of the syringe pen assembly 2 described in this embodiment is threadedly connected to the front end of the syringe pen body 3.

[0054] The cartridge can be installed inside the syringe pen body 3. At this time, the needle seat 21 is connected to the front end of the syringe pen body 3. Of course, the cartridge can also be directly connected to the front end of the syringe pen body 3. At this time, the needle seat 21 is connected to the front end of the cartridge.

[0055] In the present invention, the syringe pen cap is used to load and unload the syringe needle assembly 2. The syringe needle is not contacted during the whole process of loading and unloading the syringe needle assembly 2, thereby preventing the user or handler from being pricked and improving the safety performance during the use of the syringe needle assembly 2.

Claims

1. Injector pen cap, which is detachably connected to the injector pen body (3) and can rotate relative to the injector pen body (3), including a pen cap body (11), characterized in that: A limiting cavity (12) for installing an injection needle assembly (2) is provided at the front end of the pen cap body (11). When the injection needle assembly (2) is installed in the limiting cavity (12), the pen cap body (11) can rotate to drive the needle seat (21) of the injection needle assembly (2) to connect to or disconnect from the front end of the injection pen body (3); when the needle seat (21) is connected to the front end of the injection pen body (3), when the pen cap body (11) is pulled off from the injection pen body (3), the outer needle cap (22) of the injection needle assembly (2) can be driven to disengage from the needle seat (21) of the injection needle assembly (2), or when the pen cap body (11) is snapped onto the injection pen body (3), the outer needle cap (22) of the injection needle assembly (2) can be driven to re-embrace the needle seat (21) of the injection needle assembly (2).

2. The pen cap of the injection pen according to claim 1, characterized in that: A pen cap lid (13) for opening or closing the limiting cavity (12) is provided at the position of the pen cap body (11) corresponding to the limiting cavity (12).

3. The pen cap of the injection pen according to claim 2, characterized in that: One side of the pen cap lid (13) is hinged to the pen cap body (11), and the other side is snap-connected to the pen cap body (11).

4. The pen cap of the injection pen according to claim 3, characterized in that: A groove (14) for manually opening the pen cap lid (13) is provided on the pen cap body (11) at the snap side.

5. The pen cap of the injection pen according to claim 2, characterized in that: A mark (15) for indicating the rotation connection direction is provided on the pen cap lid (13).

6. The pen cap of the injection pen according to claim 1, characterized in that: The structural shape of the limiting cavity (12) is consistent with the outer surface structural shape of the outer needle cap (22) of the injection needle assembly (2) and can cooperate with the outer needle cap (22) to limit the rotation of the outer needle cap (22).

7. The pen cap of the injection pen according to claim 6, characterized in that: The rear end face (122) of the limiting cavity (12) cooperates with the end face of the outer needle cap (22) to axially limit the outer needle cap (22).

8. Injection pen, comprising an injection pen body (3), characterized in that: The injection pen cap (1) according to any one of claims 1 to 7 is detachably installed on the injection pen body (3), and the injection pen cap (1) can detachably connect the injection needle assembly (2) to the injection pen body (3).

9. A method for loading and unloading an injection needle assembly, including the injection pen according to claim 8, and the specific steps are as follows: S1. Pull the injection pen cap (1) off from the injection pen body (3), open the pen cap lid (13), place the injection needle assembly (2) into the limiting cavity (12) and cover the pen cap lid (13); S2. Snap the injection pen cap (1) installed with the injection needle assembly (2) onto the injection pen body (3), rotate and tighten the injection pen cap (1) according to the mark (15), and at this time the needle seat (21) of the injection needle assembly (2) is connected to the front end of the injection pen body (3); S3. Pull the injection pen cap (1) off from the injection pen body (3), and at this time the injection pen cap (1) drives the outer needle cap (22) of the injection needle assembly (2) to disengage from the needle seat (21); S4. Remove the inner needle cap from the needle seat (21) to administer the injection pen body (3). After the administration is completed, snap the injection pen cap (1) with the outer needle cap (22) back onto the injection pen body (1), rotate and loosen the injection pen cap (1) according to the mark (15), and at this time the needle seat (21) with the injection needle disengages from the front end of the injection pen body (3) and is re-embraced by the outer needle cap (22); S5. Pull the injection pen cap (1) off the injection pen body (3). At this time, the injection pen cap (1) drives the injection needle assembly (2) without the inner needle cap away from the injection pen body (3). S6. Open the cap lid (13), take out the injection needle assembly (2) without the inner needle cap and then close the cap lid (13). Then snap the injection pen cap (1) onto the injection pen body (3) for the next use.

10. A method for loading and unloading an injection needle assembly according to claim 9, characterized in that: The needle seat (21) of the injection pen assembly (2) is threadedly connected to the front end of the injection pen body (3).

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