Self-destroying insulin needle

Abstract

The application discloses a self-destroying insulin needle, which comprises an outer cap, an inner cap, a needle tube and a needle seat, a center fixed column is arranged in the middle of the needle seat, a needle tube fixing hole is arranged on the center fixed column, reinforcing ribs are arranged around the center fixed column, a needle tube protruding hole is arranged at the upper end of the inner cap, an elastic element is arranged between the needle seat and the inner cap, two convex columns and an elastic card are arranged on the outer wall of the upper part of the needle seat, and a threaded part is arranged on the inner wall of the needle seat; an elastic element mounting groove is arranged at the upper end of the inner wall of the inner cap, two first sliding grooves and a third sliding groove are arranged on the inner wall of the inner cap, a second sliding groove is arranged on the opposite side of each of the two first sliding grooves, a self-destroying convex platform is arranged below the second sliding groove, a fourth sliding groove is arranged above each of the third sliding grooves, and a fifth sliding groove is arranged on the opposite side of each of the two fourth sliding grooves. The self-destroying insulin needle has the beneficial effects that: one-time use and self-destruction after use are realized, cross infection is avoided, and medical staff and cleaning personnel are protected from being pricked.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a self-destructive insulin needle. BACKGROUND

[0002] Diabetes is a common chronic disease. In daily treatment, insulin injection is one of the important ways to control blood sugar. Eye disease is one of the common complications of diabetic patients, which can cause different degrees of visual impairment or even blindness. The commonly used insulin injection needle usually includes a needle seat, a needle body and an external protective shell. Before use, the protective shell needs to be removed to expose the needle body. After use, the needle body is completely exposed and there is no safety protection structure, which can easily cause accidental injury to others and cross infection due to accidental contact with the needle body. At the same time, due to the lack of necessary protection structure, the injection needle can be used again after use, thereby existing the risk of being reused.

[0003] The traditional insulin needle structure is as shown in Figure 12 , which includes an outer cap 1', an inner cap 2', a needle tube 3' and a needle seat 4'. In use, the insulin cartridge is spirally connected to the lower end of the needle seat 4', the outer cap 1' is removed, the inner cap 2' is removed for exhaust injection, the inner cap 2' is sleeved on the upper end of the needle seat 4' after injection, and the outer cap 1' is sleeved on the lower end of the needle seat 4'. After the needle seat 4' is rotated and detached from the cartridge, it is discarded. The disadvantages of the device are: first, the inner cap 2' needs to be manually sleeved on the needle seat 4' when disassembled, at which time the needle tube 3' is exposed, and the medical staff can be easily injured during the sleeving process; second, the protective sleeve can easily fall off when discarded, and the cleaning personnel can be easily injured and infected when cleaning; third, there is no necessary protection structure, and the injection needle can be used again after use, thereby existing the risk of being reused.

[0004] Patent No. CN211272898U provides a solution, specifically relates to a needle for preventing puncture injury, which comprises a needle seat and an insulin needle connected to the needle seat. A protective shell is slidably connected to the needle seat and cooperates with the insulin needle. The protective shell is provided with a through hole cooperating with the insulin needle. A return spring is sleeved on the insulin needle, one end of the return spring is connected to the needle seat, and the other end of the return spring is connected to the protective shell. A locking structure is provided on the shell, and the locking structure is arranged at the end of the protective shell close to the needle seat. A fixing plate is provided on the needle seat and cooperates with the locking structure. The solution effectively solves the problem that the existing insulin pen needle easily injures medical staff, but the device structure is complex, especially the locking structure, which includes a sleeve, a fixed rod, a pressing block, a fixed block, a top spring, a rotating block, and many accessories, which are complex and have high production cost.

[0005] The patent number CN212466754U provides a solution, specifically relates to a safe insulin injection needle, including inner shell, protective sleeve, lock ring, elastic element, needle body and needle seat, a plurality of rail changing devices are arranged on the inner wall of the inner shell, the rail changing device includes a first guide groove, a positioning groove, a first sliding slope and a positioning protrusion, a plurality of guide protrusions are arranged on the outer sidewall of the protective sleeve, a plurality of pressing protrusions and pressing slopes are arranged on the lower part of the protective sleeve, a plurality of through grooves, elastic arms and positioning blocks are arranged on the sidewall of the lock ring, a second sliding slope and a transition slope are arranged on the positioning block, the problems of easy injury of medical staff and repeated use of the existing insulin pen needle are effectively solved, but the device structure is complex, the spare parts are more, the assembly is complex, and the production cost is high. SUMMARY

[0006] The purpose of the present application is to provide a self-destructive insulin needle to solve the problems raised in the above background.

[0007] To achieve the above purpose, the present application provides the following technical scheme: a self-destructive insulin needle, comprising an outer cap, an inner cap, a needle tube and a needle seat, the outer cap, the inner cap and the needle seat are all cylindrical structures, the middle of the needle seat is provided with a center fixed column, the center fixed column is provided with a needle tube fixing hole penetrating in the axial direction thereof, the needle tube is installed in the needle tube fixing hole, the periphery of the center fixed column of the needle seat is provided with a plurality of reinforcing ribs, the center fixed column, the reinforcing ribs and the inner wall of the cylinder of the needle seat form a cavity, the inner cap is slidably sleeved on the outer side of the needle seat, the upper end of the inner cap is provided with a needle tube protruding hole, the needle seat and the inner cap are provided with an elastic element therebetween, one end of the elastic element abuts against the inner wall of the cylinder of the inner cap, the other end of the elastic element abuts against the inner wall of the cylinder of the needle seat, and the outer cap is clamped with the inner cap.

[0008] The outer wall of the upper part of the needle seat is provided with two protruding columns and two elastic clamping pieces which are symmetrically arranged along the circumferential direction thereof, and the inner wall of the cylinder of the needle seat is provided with a threaded portion, so as to realize the connection between the self-destructive insulin needle and the insulin cartridge.

[0009] The inner wall of the cylinder of the inner cap is provided with two first sliding grooves and two third sliding grooves which are symmetrically arranged along the circumferential direction thereof, the opposite sides of the two first sliding grooves are each provided with a second sliding groove, the lower part of the second sliding groove is provided with a self-destruction protrusion, the upper part of each third sliding groove is provided with a fourth sliding groove, the opposite sides of the two fourth sliding grooves are each provided with a fifth sliding groove, the protruding column and the third sliding groove are matched, the elastic clamping piece and the first sliding groove are matched, so as to realize the connection between the inner cap and the needle seat and the limitation of the mutual movement position.

[0010] Further preferably, the upper end of the elastic card extends outwardly to the outside of the outer wall of the barrel of the needle hub, so that the elastic card can always abut against the inner wall of the barrel of the inner cap.

[0011] Further preferably, the outer size of the convex column is smaller than the outer size of the elastic card, to ensure the stability of the connection between the inner cap and the needle hub; the width of the first sliding groove is greater than the width of the third sliding groove, to ensure the engagement connection between the first sliding groove and the elastic card and the engagement connection between the second sliding groove and the convex column.

[0012] Further preferably, the lower end entrances of the first sliding groove and the third sliding groove are both in inclined surface structures, to facilitate the engagement of the convex column into the third sliding groove and the engagement of the elastic card into the first sliding groove.

[0013] Further preferably, there is a height difference between the first sliding groove and the second sliding groove, and the second sliding groove is 0.2-0.5 mm lower than the bottom surface of the first sliding groove, to prevent the elastic card from rotating from the second sliding groove into the first sliding groove.

[0014] Further preferably, the upper end of the self-destruction convex platform is connected to the second sliding groove in an inclined surface manner, and the self-destruction convex platform is 0.2-1 mm higher than the bottom surface of the second sliding groove, to facilitate the sliding of the elastic card to the lower end of the self-destruction convex platform and prevent the elastic card from returning to the second sliding groove from the lower end of the self-destruction convex platform.

[0015] Further preferably, the fourth sliding groove and the fifth sliding groove are both in a through structure, to ensure smooth sliding of the convex column in the fourth sliding groove and the fifth sliding groove and strong connection performance; the fourth sliding groove is in an inclined upward structure, to guide the movement of the convex column and enable the length of the needle tube extending out of the inner cap to reach an effective injection length; the fifth sliding groove is vertically arranged on the inner wall of the barrel of the inner cap, to facilitate the upward movement of the inner cap driven by the elastic element.

[0016] Further preferably, the center connecting lines of the two convex columns are perpendicular to the center connecting lines of the two elastic cards, and the center connecting lines of the two first sliding grooves are perpendicular to the center connecting lines of the two third sliding grooves, to ensure the stability of the connection between the inner cap and the needle hub.

[0017] Beneficial effects: the self-destruction insulin needle of the present application realizes the movement of the needle tube relative to the inner cap through the sliding of the convex column in the third sliding groove, the fourth sliding groove and the fifth sliding groove, the sliding of the elastic card in the first sliding groove and the second sliding groove, and the engagement of the elastic card and the self-destruction convex platform, enables the needle tube to reach an effective injection length and be retracted into the inner cap, realizes the disposable use and self-destruction after use of the self-destruction insulin needle, and can avoid cross infection; and the needle tube is always in a protected state, which can protect medical staff and cleaning personnel from being pricked; the self-destruction insulin needle has few spare parts, a simple structure, convenient operation and low production cost. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1Exploded view of the self-destroying insulin needle according to the present application;

[0019] Figure 2 Axonometric view of the inner cap according to the present application;

[0020] Figure 3 Sectional view of the inner cap according to the present application;

[0021] Figure 4 Axonometric view of the needle hub according to the present application;

[0022] Figure 5 Sectional view of the needle hub according to the present application;

[0023] Figure 6 Front view of the self-destroying insulin needle according to the present application in the pre-use state;

[0024] Figure 7 Sectional view of the self-destroying insulin needle according to the present application in the pre-use state;

[0025] Figure 8 Front view of the self-destroying insulin needle according to the present application in the use state;

[0026] Figure 9 Sectional view of the self-destroying insulin needle according to the present application in the use state;

[0027] Figure 10 Front view of the self-destroying insulin needle according to the present application in the post-use state;

[0028] Figure 11 Sectional view of the self-destroying insulin needle according to the present application in the post-use state;

[0029] Figure 12 Structure of the conventional insulin needle according to the present application.

[0030] Reference numerals: 1 - outer cap, 2 - inner cap, 21 - first sliding groove, 22 - second sliding groove, 23 - third sliding groove, 24 - fourth sliding groove, 25 - fifth sliding groove, 26 - self-destroying boss, 27 - needle tube protrusion hole, 28 - elastic element installation groove, 3 - elastic element, 4 - needle tube, 5 - needle hub, 51 - central fixed column, 52 - needle tube fixing hole, 53 - reinforcing rib, 54 - cavity, 55 - threaded part, 56 - protruding column, 57 - elastic card, 1'- outer cap, 2'- inner cap, 3'- spring, 4'- needle tube. DETAILED DESCRIPTION

[0031] The following is a specific embodiment of the present application and further describes the technical solutions of the present application in conjunction with the drawings, but the present application is not limited to these embodiments.

[0032] As shown in Figures 1-5 A self-destruction insulin needle for injecting insulin is connected with an insulin cartridge. The self-destruction insulin needle comprises an outer cap 1, an inner cap 2, a needle tube 4 and a needle base 5, all of which are cylindrical structures, wherein the needle tube 4 is installed on the needle base 5, the inner cap 2 is used for supporting and protecting the needle tube 4 and can prevent the cleaner from being stabbed; the outer cap 1 is used for sleeving on the inner cap 2 to realize the sealing of the needle tube 4 inside to prevent the needle tube 4 from being contaminated and prevent the medical staff from being stabbed. The middle of the needle base 5 is provided with a central fixed column 51, the central fixed column 51 is provided with a needle tube fixing hole 52 penetrating along the axial direction thereof, the needle tube 4 is installed in the needle tube fixing hole 52 to realize the installation and fixation of the needle tube 4; the central fixed column 51 is provided with a plurality of reinforcing ribs 53 around the central fixed column 51, the central fixed column 51, the reinforcing ribs 53 and the inner wall of the cylinder of the needle base 5 form a cavity 54, the inner cap 2 is slidably sleeved on the outer side of the needle base 5, the upper end of the inner cap 2 is provided with a needle tube protruding hole 27, the needle base 5 and the inner cap 2 are provided with an elastic element 3, one end of the elastic element 3 abuts against the inner wall of the cylinder of the inner cap 2, the other end of the elastic element 3 abuts against the inner wall of the cylinder of the needle base 5, and the outer cap 1 is clamped with the inner cap 2. In the present application, the elastic element 3 is a spring, the number of the reinforcing ribs 53 is four, which are fixed on the outer side of the central fixed column 51 in a cross shape, the elastic element 3 (i.e. the spring) is sleeved on the four reinforcing ribs 53 and clamped in the cavity 54, the reinforcing ribs 53 not only ensure the structural strength of the central fixed column 51, but also guide the elastic element 3; the two ends of the elastic element 3 abut against the inner cap 2 and the needle base 5 respectively and are in a compressed state, which realizes the elastic pressure on the inner cap 2 in the use process, so that the inner cap 2 always keeps a stable state relative to the needle base 5, which is convenient for the use of the self-destruction insulin needle; at the same time, the inner cap 2 can be popped up after use to protect the needle tube 4 in the inner cap 2, the needle tube 4 will not leak out of the inner cap 2, the medical staff is protected from being stabbed, the cleaner is protected from being stabbed, and repeated use and cross infection can be avoided.

[0033] In the present application, the upper outer wall of the needle base 5 is provided with two protruding columns 56 and two elastic clamping pieces 57 symmetrically arranged along the circumferential direction thereof, the clamping of the needle base 5 and the inner cap 2 is realized through the protruding columns 56 and the elastic clamping pieces 5 and 7; the inner wall of the cylinder of the needle base 5 is provided with a threaded portion 55 for connecting with the insulin cartridge.

[0034] In the application, the upper end of the inner cap 2 is provided with an elastic element mounting groove 28 in the inner wall of the barrel, which is used for clamping the upper end of the elastic element 3, and the upper and lower ends of the elastic element 3 are limited by the cavity 54 and the elastic element mounting groove 28. The inner wall of the barrel of the inner cap 2 is provided with two first sliding grooves 21 and two third sliding grooves 23 along the circumferential direction, the opposite sides of the two first sliding grooves 21 are each provided with a second sliding groove 22, the lower side of the second sliding groove 22 is provided with a self-destruction boss 26, the upper side of each third sliding groove 23 is provided with a fourth sliding groove 24, the opposite sides of the two fourth sliding grooves 24 are each provided with a fifth sliding groove 25, the protruding column 56 and the third sliding groove 23 are matched, and the elastic card 57 and the first sliding groove 21 are matched. Through the first sliding groove 21 and the third sliding groove 23 arranged on the inner cap 2, the clamping connection of the inner cap 2 and the needle seat 5 is facilitated, the protruding column 56 is clamped into the fourth sliding groove 24 along the third sliding groove 23, which can prevent the inner cap 2 and the needle seat 5 from being separated; the elastic card 57 is clamped along the first sliding groove 21, and in the use process, it enters the second sliding groove 22 and the lower end of the self-destruction boss 26 in turn. When the elastic card 57 enters the second sliding groove 22, the inner cap 2 is limited, which prevents the inner cap 2 from rotating relative to the needle seat 5, and with the up and down movement of the inner cap 2, the elastic card 57 can be guided to move downward and to the lower end of the self-destruction boss 26, which cannot move upward, preventing the inner cap 2 from moving towards the needle seat 5, preventing the inner cap 2 or the needle seat 5 from moving towards each other due to force or touching, keeping the needle tube 4 in a protected state, preventing the needle tube 4 from protruding out of the needle tube protruding hole 27 of the inner cap 2, preventing the medical staff or the cleaning staff from being stabbed, avoiding the self-destruction type insulin needle from being reused, avoiding cross infection, and realizing the self-destruction of the self-destruction type insulin needle.

[0035] In the application, the upper end of the elastic card 57 extends outwardly from the outer wall of the barrel of the needle seat 5, so that the elastic card 57 can always abut against the inner wall of the barrel of the inner cap 2, the lower end of the self-destruction boss 26 abuts against the elastic card 57, and the self-destruction function is realized.

[0036] In the application, the outer size of the protruding column 56 is smaller than the outer size of the elastic card 57, which ensures the stability of the connection between the inner cap 2 and the needle seat 5; the width of the first sliding groove 21 is greater than the width of the third sliding groove 23, which ensures the clamping connection of the first sliding groove 21 and the elastic card 57 and the clamping connection of the second sliding groove 21 and the protruding column 56; and the lower end entrances of the first sliding groove 21 and the third sliding groove 23 are both inclined surfaces, which facilitates the clamping of the protruding column 56 into the third sliding groove 23 and the clamping of the elastic card 57 into the first sliding groove 21, and facilitates the connection of the inner cap 2 and the needle seat 5.

[0037] In this application, there is a height difference between the contact surfaces of the first slide groove 21 and the second slide groove 22. The bottom surface of the second slide groove 22 is 0.2-0.5mm lower than that of the first slide groove 21. This can prevent the elastic card 57 from rotating back from the second slide groove 22 to the first slide groove 21, thereby preventing the inner cap 2 from returning to its initial state during use, which would lead to injection failure of the self-destructing insulin needle.

[0038] In this application, the upper end of the self-destructing protrusion 26 is connected to the second slide groove 22 at an angle, and the self-destructing protrusion 26 is 0.2-1mm higher than the bottom surface of the second slide groove 22, so that the elastic card 57 can slide to the lower end of the self-destructing protrusion 26 and cannot return to the second slide groove 22 from the lower end of the self-destructing protrusion 26, making the self-destructing insulin needle a disposable needle.

[0039] In this application, both the fourth groove 24 and the fifth groove 25 are through structures, ensuring that the protrusion 56 slides smoothly in the fourth groove 24 and the fifth groove 25, and has strong connection performance; the fourth groove 24 is an inclined upward structure, which can guide the movement of the protrusion 56, so that the length of the needle tube 4 extending out of the inner cap 2 can reach the effective injection length; the fifth groove 25 is vertically set on the inner wall of the inner cap 2, which facilitates the elastic element 3 to push the inner cap 2 upward.

[0040] In this application, the center connection line of the two protruding pillars 56 is perpendicular to the center connection line of the two elastic cards 57, and the center connection line of the two first grooves 21 is perpendicular to the center connection line of the two third grooves 23, so that the connection between the inner cap 2 and the needle seat 5 is stable, ensuring the effectiveness of the self-destructing insulin needle.

[0041] like Figures 6-11 As shown, the self-destructing insulin needle operates as follows: After connecting the self-destructing insulin needle to the pen cartridge, remove the outer sheath 1, vent air, adjust the injection dosage, and perform other clinical procedures such as heat dissipation before injection. During injection, push the insulin pen, compressing the elastic element 3. The inner cap 2 rotates relative to the needle seat 5 along the fourth groove 24 until the protrusion 56 abuts against the upper end of the fifth groove 55. At the same time, the elastic card 57 moves from the first groove 21 into the second groove 22. At this point, the effective injection length of the needle 4 is fully inserted into the patient's skin tissue. Press the insulin pen injection button to complete the injection process. After injection, push the insulin pen, and the needle is pulled out of the patient's skin tissue. At this point, the inner cap 2, under the action of the elastic element 3, moves linearly relative to the needle seat 5 along the fifth groove 55 until the protrusion 56 abuts against the lower end of the fifth groove 55. At this point, the elastic card 57 is just below the self-destructing protrusion 26 and cannot move upwards again. The entire elastic card 57 is placed inside the inner cap 2 and cannot be manually removed, thus completing the self-destruction. In this state, the syringe 4 is completely enclosed within the inner protective cap 2 housing; the needle can be removed and discarded.

[0042] Finally, it should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that the technical solutions described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalent ones. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the present application.

Claims

1. A self-destructing insulin needle, comprising an outer cap (1), an inner cap (2), a needle tube (4), and a needle hub (5), wherein the outer cap (1), the inner cap (2), and the needle hub (5) are all cylindrical structures, a central fixing post (51) is provided in the middle of the needle hub (5), a needle tube fixing hole (52) is provided on the central fixing post (51) through which the needle tube passes along its axial direction, the needle tube (4) is installed in the needle tube fixing hole (52), a plurality of reinforcing ribs (53) are provided around the central fixing post (51) of the needle hub (5), and the inner wall of the central fixing post (51), the reinforcing ribs (53), and the needle hub (5) form a cavity (54), the inner cap (2) is slidably sleeved on the outside of the needle hub (5), and a needle tube protrusion hole (27) is provided at the upper end of the inner cap (2), characterized in that: An elastic element (3) is provided between the needle seat (5) and the inner protective cap (2). One end of the elastic element (3) abuts against the inner wall of the inner protective cap (2), and the other end of the elastic element (3) abuts against the inner wall of the needle seat (5). The outer protective cap (1) and the inner protective cap (2) are engaged and locked together. The upper outer wall of the needle holder (5) is provided with two symmetrically arranged protrusions (56) and two elastic clips (57) along its circumferential direction, and the inner wall of the needle holder (5) is provided with a threaded part (55). The inner cap (2) has an elastic element mounting groove (28) at the upper end of its cylinder. The inner wall of the inner cap (2) has two symmetrically arranged first sliding grooves (21) and two third sliding grooves (23) along its circumference. Each of the two first sliding grooves (21) has a second sliding groove (22) on its opposite side. A self-destructing boss (26) is located below each of the second sliding grooves (22). A fourth sliding groove (24) is located above each of the third sliding grooves (23). The two fourth sliding grooves (28)... 4) Each of the opposite sides is provided with a fifth slide groove (25), the protrusion (56) and the third slide groove (23) are configured to cooperate, the elastic card (57) and the first slide groove (21) are configured to cooperate; there is a height difference between the contact surfaces of the first slide groove (21) and the second slide groove (22), and the bottom surface of the second slide groove (22) is lower than that of the first slide groove (21); the upper end of the self-destructing protrusion (26) is connected to the second slide groove (22) at an angle, and the self-destructing protrusion (26) is higher than the bottom surface of the second slide groove (22).

2. The self-destructing insulin needle according to claim 1, characterized in that: The upper end of the elastic card (57) extends outward toward the outer side of the outer wall of the needle holder (5).

3. A self-destructing insulin needle according to claim 1, characterized in that: The external dimensions of the protrusion (56) are smaller than those of the elastic card (57), and the width of the first groove (21) is greater than the width of the third groove (23).

4. A self-destructing insulin needle according to claim 1, characterized in that: The lower inlets of the first chute (21) and the third chute (23) are both inclined structures.

5. A self-destructing insulin needle according to claim 1, characterized in that: The bottom surface of the second groove (22) is 0.2-0.5 mm lower than that of the first groove (21).

6. A self-destructing insulin needle according to claim 1, characterized in that: The self-destructing boss (26) is 0.2-1mm higher than the bottom surface of the second groove (22).

7. A self-destructing insulin needle according to claim 1, characterized in that: Both the fourth slide groove (24) and the fifth slide groove (25) are open structures. The fourth slide groove (24) is inclined upward, and the fifth slide groove (25) is vertically set on the inner wall of the inner cap (2).

8. A self-destructing insulin needle according to claim 1, characterized in that: The center connecting lines of the two protrusions (56) and the center connecting lines of the two elastic cards (57) are perpendicular to each other, and the center connecting lines of the two first grooves (21) and the center connecting lines of the two third grooves (23) are perpendicular to each other.

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