Disposable safety self-destruction insulin needle

摘要

The present invention discloses a disposable safety self-destmction insulin needle. The invention uses a sleeve-connected linkage structure and realizes an instant reset of the safety sleeve by means of the spring located in the middle axis so as to ensure that the needle tube is not exposed and preferably realizes a tilting and deflection of the self-destruction pressure base by means of the a plurality of flexible plates unevenly distributed on the inner wall in the needle base so as to finally ensure that the insulin needle cannot be used a second time, in so doing the safety self-destruction operation of the insulin needle is realized.

主权项

1. A disposable safety self-destruction insulin needle, it comprises a body of the insulin needle, characterized in that the body of the insulin needle is provided with a needle base (1) therein, which is generally in a form of cylinder and which has a hollow chamber which is provided with needle tube substrate (9) therein dividing the needle base into an upper separate space (12) and a lower separate space (13) that is provided on the inner Nvall with an inner screw (20), the needle tube substrate (9) is provided on the center position of the upper surface with a spring holding post (10) whose lower portion is located in the upper separate space (12), the needle tube substrate (9) is provided with a needle tube (7) which penetrates the needle tube substrate (9), one end of the needle tube (7) extends upward followed by penetrating the spring holding post (10) located on the centre position of the needle tube substrate (9), the other end of the needle tube (7) extends towards inside of the lower separate space(13) followed by penetrating the needle tube substrate (9), the two ends of the needle tube (7) each are in form of a spine, the needle tube (7) is provided on the inner wall of the upper separate space (12) thereon with at least one spring plate (11) which is located diagonally on the inner wall of the inner chamber of the needle tube (7) and one end of which is connected to the inner wall of the inner chamber of the needle tube (7) and the other end of which suspends in the air, the suspending end points to the upper surface of the needle tube substrate (9) at the place close to the center position, the spring holding post (10) is fitted over by a spring (6) on the outside, one end of the spring (6) abuts downward against the upper surface of the needle tube substrate (9), the other end of the spring (6) upward abuts against safety sleeve (5), the upper end of the needle base (1) is fitted over hs a safety clamping seat (4) the lower end of which fits in/over the upper end of the needle base (1) each other, the upper end of the safety clamping seat (4) is provided with a safety sleeve (5) and the safety clamping seat (4) is shaped as a general cylinder and has a hollow chamber and is provided on the inner edge of the upper opening with an annular limiting part (14), the safety sleeve (5) is shaped as a cylinder and has a hollow chamber and is provided on the outer edge of the lower opening with an annular limiting protruded part (15) cooperating to the annular limiting part (14), the annular limiting protruded part (15) is located within the chamber of the safety clamping seat (4) under the annular limiting part (14), the upper end surface of the annular limiting protruded part (15) abuts downward against the lower end surface of the annular limiting part (14), the outer edge of the lower opening of the safety sleeve (5) limit and fit in/over the inner edge of the upper opening of the safety clamping seat (4), the spring (6) is fitted over by a self-destruction pressure base (3) which is shaped as a general cylinder and has a hollow chamber, the outer diameter of the upper portion of the self-destruction base (3) is smaller than the outer diameter of the lower portion of the self-destruction base (3), an annular position-limiting step (16) is formed between the upper portion and the lower portion of the self-destruction pressure seat (3), the outer diameter of the lower portion of the self-destruction pressure seat (3) is larger than the diameter of the inner chamber of the safety sleeve (5), the outer diameter of the upper portion of the self-destruction pressure seat (3) is smaller or equal to the diameter of the inner chamber of the safety sleeve (5), the upper portion of the self-destruction pressure seat (3) is located in the chamber of the safety sleeve (5), the annular position-limiting step (16) has an end surface which abuts against the end surface of the lower end of the safety sleeve (5), the outer wall of the lower portion of the self-destruction pressure seat (3) is provided with an annular lump (17) cooperating with the spring plate (11), the vertical distance between the annular lump (17) and the needle tube (7) is larger than the vertical distance between the suspending part of the spring plate (11) and the needle tube (7), the upper end of the safety sleeve (5) is in a closed form, the closed end is provided with a round hole therein, the diameter of which is smaller than the diameter of the upper end of the spring (6), the spring (6) has an upper end abutting upward against the inner surface of the upper end surface of the safety sleeve (5), the end surface of the lower end of the needle base (1) is covered with a dialysis paper.