Safe insulin injection needle
By using the threaded connection and rotational design of the inner and outer caps, the problem of insulin injection needles piercing the side wall when the cap is put back on is solved, realizing automatic shielding of the safety needle and improving the safety of use.
Patent Information
- Application Number
- CN202520620180.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-03
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-04-03
AI Technical Summary
Existing insulin injection needles are prone to puncturing the side wall of the needle cap when the cap is reattached, posing a risk of accidental needlestick injury.
A safety insulin injection needle was designed, which automatically shields the needle by means of the threaded connection and relative rotation of the inner and outer caps, thus preventing the needle from piercing the side wall.
This effectively avoids the phenomenon of needles piercing the side wall, improves safety during use, and prevents accidental needlestick injuries.
Smart Images
Figure CN223760192U_ABST
Abstract
Description
Technical Field
[0001] This application relates to a medical device, and more particularly to a safety insulin injection needle. Background Technology
[0002] Insulin pen needles are for single use only and must be reattached each time. After injection, the needle cap must be replaced to prevent the needle from protruding and causing accidental needlestick injuries.
[0003] Because the needle is very thin and very sharp, when recapping the needle, the needle often pierces the side wall of the needle cap and protrudes to the outside.
[0004] Therefore, those skilled in the art have proposed some improvement solutions, such as the "Insulin Pen Needle and Insulin Injector" proposed in CN21920334U. However, this solution does not deviate from the idea of recapping the needle, and there is still a possibility of needle puncture. Utility Model Content
[0005] In view of the above problems, this application aims to provide a safe insulin injection needle that can completely avoid the occurrence of needle puncture of the side wall.
[0006] The safety insulin injection needle of this application includes: an inner cap and an outer cap;
[0007] The inner cap is formed into a tube, with its upper end closed by the first end cap and its lower end open; a tubular needle body is formed on the upper side of the first end cap, and the needle body communicates with the internal space of the inner cap; an internal thread is formed on the inner circumferential surface of the inner cap for connecting to the nipple of the insulin pen; an external thread is formed on the outer circumferential surface of the inner cap.
[0008] The outer cap is formed in a tubular shape, with its upper end closed by a second end cap and its lower end open; a circular through hole is formed in the middle of the second end cap; a rubber membrane is covered over the through hole; internal threads are formed on the inner circumferential surface of the outer cap;
[0009] The outer cap is fitted over the inner cap, and the internal thread of the outer cap engages with the external thread of the inner cap; the second end cap is located above the first end cap;
[0010] When the outer cap rotates so that its lower part is above the inner cap, the needle body is inside the outer cap; when the outer cap rotates so that its lower part is below the inner cap, the needle body pierces the rubber membrane and is exposed above the outer cap.
[0011] Preferably, the rubber membrane is located on the underside of the second end cap.
[0012] Preferably, the upper edge of the inner cap has a first annular protrusion protruding outward; the lower edge of the outer cap has a second annular protrusion protruding inward; when the lower part of the outer cap is located above the inner cap, the first annular protrusion stops the second annular protrusion.
[0013] Preferably, the lower edge of the inner cap has a third annular protrusion that protrudes outward; the third annular protrusion extends radially beyond the outer circumferential surface of the outer cap.
[0014] Preferably, the outer peripheral surface of the third annular protrusion is formed as a rough surface.
[0015] The safety insulin injection needle of this application has a structure of inner and outer caps that can rotate relative to each other and move in relative position axially. After insulin injection, the needle body can be shielded by rotating the outer cap. Attached Figure Description
[0016] Figure 1 This is a three-dimensional structural diagram of the safety insulin injection needle of this application, in state one.
[0017] Figure 2 for Figure 1 A schematic diagram of the cross-section of a safety insulin injection needle.
[0018] Figure 3 This is a three-dimensional structural diagram of the second state of the safety insulin injection needle of this application.
[0019] Figure 4 for Figure 3 A schematic diagram of the cross-section of a safety insulin injection needle.
[0020] Figure 5 , 6 This is a schematic diagram of the safety insulin injection needle of this application being installed on an insulin pen. Detailed Implementation
[0021] The safety insulin injection needle of this application will now be described in detail with reference to the accompanying drawings.
[0022] The safety insulin injection needle of this application includes: an inner cap 1 and an outer cap 2.
[0023] The inner cap 1 is formed in the shape of a tube, with its upper end closed by a first end cap and its lower end open; a tubular needle body 11 is formed at the center of the upper side of the first end cap, and the needle body 11 communicates with the internal space of the inner cap 1; an internal thread is formed on the inner circumferential surface of the inner cap 1 for connecting to the nipple of the insulin pen; an external thread is formed on the outer circumferential surface of the inner cap 1.
[0024] The outer cap 2 is formed in the shape of a tube, with its upper end closed by a second end cap and its lower end open; a circular through hole 21 is formed in the middle of the second end cap; the through hole 21 is covered by a rubber membrane 22; and an internal thread is formed on the inner circumferential surface of the outer cap 2.
[0025] The outer cap 2 is fitted onto the inner cap 1, and the internal thread of the outer cap 2 is engaged with the external thread of the inner cap; the second end cap is located above the first end cap.
[0026] When the outer cap 2 rotates so that its lower part is above the inner cap 1, as... Figure 3 , 4 As shown, the needle body 11 is located inside the outer cap 2; when the lower part of the outer cap 2 is located below the inner cap 1, as... Figure 1 , 2 As shown, the needle body 11 pierces the rubber membrane 22 and is exposed above the outer cap 2.
[0027] The rubber diaphragm 22 is located on the underside of the second end cap.
[0028] The upper edge of the inner cap 1 has a first annular protrusion 13 protruding outward; the lower edge of the outer cap 3 has a second annular protrusion 23 protruding inward; when the lower part of the outer cap 2 is located above the inner cap, the first annular protrusion 13 stops the second annular protrusion 23.
[0029] The lower edge of the inner cap has a third annular protrusion 12 that protrudes outward; the third annular protrusion 12 extends radially beyond the outer peripheral surface of the outer cap 2. The outer peripheral surface of the third annular protrusion 12 is roughened. The third annular protrusion 12 serves as an operating part for operating the inner cap.
[0030] When not in use, the structure of the safety insulin injection needle of this application is as follows: Figure 3 , 4 As shown. Then, by manipulating the third annular protrusion, the inner cap is installed on the nipple of the insulin pen, as shown. Figure 5 As shown. Then, manipulate the outer circumference of the outer cap to rotate it relative to the inner cap, causing the needle body to pierce the rubber membrane, as shown. Figure 6 As shown, insulin injection can now be performed. After injection, reposition the cap back onto the skin. Figure 5 In the state shown, the needle body is covered, and then the third annular protrusion is operated to remove the entire safety insulin injection needle from the insulin pen.
Claims
1. A safety insulin injection needle characterized in that Comprise: an inner cap, an outer cap; the inner cap is formed in a tubular shape, its upper end is closed by a first end cap, its lower end is open; the upper side of the first end cap is formed with a tubular needle body, the needle body communicates with the inner space of the inner cap; the inner circumferential surface of the inner cap is formed with an internal thread, used for combining to the nipple of an insulin injection pen; the outer circumferential surface of the inner cap is formed with an external thread; the outer cap is formed in a tubular shape, its upper end is closed by a second end cap, its lower end is open; the middle part of the second end cap is formed with a circular through hole; the through hole is covered with a rubber film; the inner circumferential surface of the outer cap is formed with an internal thread; the outer cap is sleeved on the inner cap, the internal thread of the outer cap is combined with the external thread of the inner cap; the second end cap is located above the first end cap; when the outer cap is rotated so that its lower part is located in the upper part of the inner cap, the needle body is located in the outer cap; when the outer cap is rotated so that its lower part is located in the lower part of the inner cap, the needle body pierces the rubber film and is exposed above the outer cap.
2. The safety insulin injection needle according to claim 1, characterized in that: the rubber film is on the lower side of the second end cap.
3. The safety insulin injection needle according to claim 1, characterized in that: the upper end edge of the inner cap is formed with a first annular protruding part protruding outward; the lower end edge of the outer cap is formed with a second annular protruding part protruding inward; when the lower part of the outer cap is located in the upper part of the inner cap, the first annular protruding part stops the second annular protruding part.
4. The safety insulin injection needle according to claim 1, characterized in that: the lower end edge of the inner cap is formed with a third annular protruding part protruding outward; the third annular protruding part exceeds the outer circumferential surface of the outer cap in the radial direction.
5. The safety insulin injection needle according to claim 4, characterized in that: the outer circumferential surface of the third annular protruding part is formed in a rough surface.