Insulin needle point safety protection mechanism

Abstract

The utility model discloses an insulin needle tip safety protection mechanism, which comprises a protection shell, a needle cap and a needle tip, the protection shell comprises an inner shell and an outer shell, the needle cap is arranged on the inner shell, a spiral groove is arranged on the inner wall of the outer shell, the spiral groove extends downwards along the inner wall of the outer shell, and the needle tip is arranged in the spiral groove. A positioning block matched with the spiral groove is fixedly arranged on the outer wall of the inner shell, the positioning block is arranged on the spiral groove in a matched mode, an upper limiting clamping groove and a lower limiting clamping groove are formed in the two ends of the spiral groove respectively, and the upper limiting clamping groove and the lower limiting clamping groove are both matched with the positioning block; the upper limiting clamping groove and the lower limiting clamping groove are used for limiting the upward moving position and the downward moving position of the outer shell respectively, and the outer shell is used for blocking the used needle tip. The insulin injection device is simple in structure, low in cost and capable of meeting the market use requirement of the insulin injection device, the needle cap and the needle tip can be recycled easily and effectively, and it can be guaranteed that puncture accidents are prevented.

Description

Technical Field

[0001] This utility model belongs to the field of medical equipment and relates to insulin injection devices, specifically to an insulin needle tip safety protection mechanism. Background Technology

[0002] Insulin injection devices are commonly used by diabetic patients. The vast majority of existing insulin injection devices are disposable, such as… Figure 1 As shown, it mainly includes a protective shell 1, a needle cap 2, and a needle tip 21. During injection, the needle cap 2 and the needle tip 21 are pushed out, exposing the protective shell 1. In actual use, after the injection, the needle tip 21 will be exposed. Whether in the disposal operation or the subsequent recycling operation, the needle tip 21 is easily exposed, and the safety is not ideal.

[0003] To address this issue, patent document CN117205404A provides an insulin needle tip protection mechanism and an insulin injection device. This device features a needle cap and needle tip retrieval function, preventing subsequent needle pricks. However, this device has some problems in practical application and use, as follows:

[0004] 1. In order to achieve the needle cap and needle tip retrieval function, the device's structural design is relatively complex and cumbersome, resulting in a high overall cost for the injection device. Given the high frequency of use of insulin injection devices, this design is difficult to truly achieve mass production and productization.

[0005] 2. After the insulin injection device has finished injecting, the operation of retrieving the needle cap and needle tip is relatively cumbersome and difficult. Users may encounter problems such as not being able to operate it properly or being unable to retrieve it, so the effect of use is not ideal. Summary of the Invention

[0006] Purpose of the invention: In order to overcome the shortcomings of the existing technology, an insulin needle tip safety protection mechanism is provided. It is not only simple in structure and low in cost, which can meet the market demand for insulin injection devices, but also the needle cap and needle tip retrieval operation is simple and effective, which can ensure the prevention of needle stick injuries.

[0007] Technical Solution: To achieve the above objectives, this utility model provides an insulin needle tip safety protection mechanism, including a protective shell, a needle cap, and a needle tip. The protective shell includes an inner shell and an outer shell. The needle cap is disposed on the inner shell. A spiral groove is provided on the inner wall of the outer shell, extending downward along the inner wall of the outer shell. A positioning block matching the spiral groove is fixedly disposed on the outer wall of the inner shell, and the positioning block engages with the spiral groove. An upper limit slot and a lower limit slot are respectively provided at both ends of the spiral groove, and both the upper limit slot and the lower limit slot are matched with the positioning block. The upper limit slot and the lower limit slot are used to limit the upward and downward movement of the outer shell, respectively. The outer shell is used to block the used needle tip.

[0008] Furthermore, both the inner shell and the outer shell are cylindrical structures.

[0009] Furthermore, the positioning block has a spherical structure.

[0010] Furthermore, a fixing groove is provided on the outer wall of the inner shell, and the positioning block is bonded and fixed to the fixing groove.

[0011] Furthermore, the width of the spiral groove is greater than the diameter of the positioning block.

[0012] Beneficial effects: Compared with the prior art, this utility model designs the protective shell as a combination structure of inner shell and outer shell. Through the cooperative design of spiral groove and positioning block, as well as the limiting effect of upper limit slot and lower limit slot, the used needle tip is covered by the rotation and downward movement of the outer shell. This simple structural design can effectively prevent the needle tip from being exposed. Not only is the structure simple and low cost, which can meet the market demand for insulin injection devices, but the needle cap and needle tip retrieval operation is simple and effective, which can ensure the prevention of needle stick incidents. Attached Figure Description

[0013] Figure 1 A simplified structural diagram of an existing insulin injection device;

[0014] Figure 2 This is a schematic diagram of the structure of this utility model;

[0015] Figure 3 This is a schematic diagram showing the connection between the outer shell and the positioning block;

[0016] Figure 4 Top sectional view of the protective casing;

[0017] Figure 5 This is a diagram showing the state of the protective casing after injection. Detailed Implementation

[0018] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0019] like Figures 2-4 As shown, this utility model provides a safety protection mechanism for insulin needle tips, including a protective shell 1, a needle cap 2, and a needle tip 21. The protective shell 1 includes an inner shell 3 and an outer shell 4, both of which are cylindrical structures. The needle cap 2 is disposed on the inner shell 3, and the needle tip 21 is disposed at the bottom of the needle cap 2. A spiral groove 5 is provided on the inner wall of the outer shell 4, extending spirally downward along the inner wall of the outer shell 4. A positioning block 6, which matches the spiral groove 5, is fixedly disposed on the outer wall of the inner shell 3. The positioning block 6 is a spherical structure. A fixing groove 9 is provided on the outer wall of the inner shell 3. A portion of the positioning block 6 is bonded and fixed to the fixing groove 9 on multiple sides, while the other portion extends out of the fixing groove 9 and fits into the spiral groove 5. The groove width of the spiral groove 5 is greater than the diameter of the positioning block 6. The two ends of the spiral groove 5 are respectively provided with an upper limit slot 8 and a lower limit slot 7. Both the upper limit slot 8 and the lower limit slot 7 are matched with the positioning block 6. The positioning block 6 can be locked and fixed on the upper limit slot 8 or the lower limit slot 7. The upper limit slot 8 and the lower limit slot 7 are used to limit the upward and downward movement of the outer shell 4, respectively. The outer shell 4 is used to block the used needle tip 21.

[0020] In this embodiment, the above-mentioned insulin needle tip safety protection mechanism is applied in actual operation. Before injection, the needle cap 2 and needle tip 21 are pushed out of the protective housing 1. At this time, the positioning block 6 is engaged in the lower limit slot 7. After the injection is completed, the outer housing 4 is rotated so that the positioning block 6 is disengaged from the lower limit slot 7, and the spiral groove 5 of the outer housing 4 moves downward with the positioning block 6 as the reference. The outer housing 4 moves downward with the rotation until the positioning block 6 is engaged in the upper limit slot 8. Due to the engaging action of the positioning block 6 and the upper limit slot 8, the position of the outer housing 4 is fixed. At this time, the outer housing 4 reaches the lowest position, and the needle cap 2 and needle tip 21 are completely inside the outer housing 4 and will not be exposed to the outside. There is no risk of puncture when performing subsequent operations on the insulin injection device, which can ensure the prevention of puncture incidents.

[0021] As can be seen from the above operation, the insulin needle tip safety protection mechanism uses the outer shell to rotate and move downward to cover the used needle tip 21. This simple structural design can effectively prevent the needle tip 21 from being exposed. Not only is the structure simple and the cost low, which can meet the market demand for insulin injection devices, but the needle cap 2 and needle tip 21 can also be retrieved in a simple and effective manner, ensuring that needle sticking incidents are prevented.

Claims

1. A safety protection mechanism for an insulin needle tip, comprising a protective shell, a needle cap, and a needle tip, characterized in that, The protective housing includes an inner housing and an outer housing. The needle cap is disposed on the inner housing. A spiral groove is provided on the inner wall of the outer housing, extending downward along the inner wall of the outer housing. A positioning block matching the spiral groove is fixedly disposed on the outer wall of the inner housing, and the positioning block engages with the spiral groove. An upper limit slot and a lower limit slot are respectively provided at both ends of the spiral groove, and both the upper limit slot and the lower limit slot are matched with the positioning block. The upper limit slot and the lower limit slot are used to limit the upward and downward movement of the outer housing, respectively. The outer housing is used to block the used needle tip.

2. The insulin needle tip safety protection mechanism according to claim 1, characterized in that, Both the inner shell and the outer shell are cylindrical structures.

3. The insulin needle tip safety protection mechanism according to claim 1, characterized in that, The positioning block has a spherical structure.

4. The insulin needle tip safety protection mechanism according to claim 1, characterized in that, A fixing groove is provided on the outer wall of the inner shell, and the positioning block is bonded and fixed to the fixing groove.

5. The insulin needle tip safety protection mechanism according to claim 3, characterized in that, The width of the spiral groove is greater than the diameter of the positioning block.

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