Syringe capable of preventing needle head from being separated

Abstract

The syringe capable of preventing the needle head from disengaging comprises a syringe body, an injection needle connected with the syringe body and a protective cover arranged outside the injection needle in a covering mode, the syringe body is composed of a needle cylinder, a nipple, a rubber plug and a push rod, the nipple is installed at the end of the needle cylinder, the rubber plug is installed in the needle cylinder, and the push rod is connected with the rubber plug. A limiting assembly is arranged in the protective cover, due to the fact that the connector is in threaded connection with the nipple, the situation that the injection needle falls off in the injection process is avoided, the protective cover is covered after injection is completed, the protective cover can be prevented from falling off under the action of the limiting assembly, and therefore the risk of pricking injury can be effectively avoided; after injection is finished, the push rod is pushed to the rubber plug to be attached to the needle cylinder, the push rod is conveniently and easily broken under the action of an easy-to-break groove, at the moment, the push rod can be prevented from being pulled out of the needle cylinder under the action of external force through cooperation of a second limiting ring and a limiting plate, and therefore the situation that the injector is repeatedly used is effectively avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of syringes, and particularly relates to a syringe for preventing the needle from detaching. Background Art

[0002] A syringe is a common medical tool. When using a syringe, the injection needle is connected to the syringe barrel. However, the traditional connection position is a socket connection, and the friction between the needle and the nipple is relied on to prevent the needle from detaching. However, for drugs such as benzathine penicillin, since the needle is prone to clogging during the injection process, we will inject a little faster during the injection process. During the process of the needle clogging, the pressure is high, and the syringe barrel and the needle are prone to detach, resulting in drug spraying. After retrieval, it is found that the patent application number "202322023840.7" discloses "a syringe", which records "a syringe barrel for containing liquid medicine, with one end open and the other end connected to a needle nipple. The outer wall of the needle nipple is provided with threads, and a syringe barrel protrusion is connected around the inner wall near the edge at the end of the syringe barrel away from the needle nipple; a piston rod for aspirating liquid medicine, movably connected inside the syringe barrel, with one end connected to a piston and the other end connected to a grasping part; a needle for puncturing, including a needle hub and a needle shaft, and the inner wall of the needle hub is provided with threads, which are threadedly matched with the needle nipple to prevent the needle and the syringe barrel from detaching". When the above syringe is used, the threaded connection method can effectively prevent the needle from detaching during the injection process, and the wing provided can prevent medical staff from being pricked by the needle when covering the needle cap. However, there are still some deficiencies in the above syringe when it is used: after the above syringe is used, the needle cap is covered, but the needle cap may also detach, and there is still a risk of needle prick injury. Moreover, the above syringe does not have the risk of self-destruction, and ordinary people may use this syringe repeatedly, resulting in a risk of cross-infection. Based on this, we propose a syringe that can prevent the needle from detaching, prevent needle prick injury, and has a self-destruction function at the same time. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a syringe for preventing the needle from detaching, aiming to solve the problems raised in the background art.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A syringe for preventing the needle from detaching, comprising a syringe main body, an injection needle connected to the syringe main body, and a protective cover covering the outside of the injection needle. The syringe main body is composed of a syringe barrel, a nipple, a rubber stopper, and a push rod. The nipple is installed at the end of the syringe barrel, the rubber stopper is installed inside the syringe barrel, and the push rod is connected to the rubber stopper;

[0005] The injection needle includes a connector and a needle body connected to the connector. The inner wall of the connector is provided with an internal thread, and the surface of the nipple is provided with an external thread. The connector and the nipple are fixed by screwing the internal thread and the external thread. The protective cover is sleeved outside the connector, and wings are provided on both sides of the protective cover. An easy-break groove is provided at one end of the push rod away from the rubber stopper.

[0006] A limiting component is arranged inside the protective cover.

[0007] As a preferred technical solution of the present invention, the limiting component includes grooves opened on both sides inside the protective cover. The bottom end of the groove is connected with a limiting strip, and the limiting strip is inclined. A first limiting ring is arranged on the top of the connector, and the size of the first limiting ring matches the size of the bottom of the protective cover.

[0008] As a preferred technical solution of the present invention, a second limiting ring is arranged on the inner wall of one end of the syringe barrel away from the nipple. A limiting plate is installed on the surface of one end of the push rod away from the rubber stopper. The limiting plate is located on one side of the easy-break groove, and the size of the limiting plate matches the inner diameter size of the syringe barrel.

[0009] As a preferred technical solution of the present invention, when the rubber stopper is close to the end of the syringe barrel, the limiting plate is located inside the syringe barrel and close to the second limiting ring.

[0010] As a preferred technical solution of the present invention, the size of the limiting strip matches the size of the groove.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: Since the connector and the nipple are connected by threads, the injection needle will not fall off during the injection process. After the injection is completed, the protective cover is covered, and under the action of the limiting component, the protective cover can be prevented from falling off, so as to effectively avoid the risk of needle stick injury. After the injection is completed, the push rod is pushed until the rubber stopper fits the syringe barrel, and the easy-break groove facilitates the easy breaking of the push rod. At this time, the second limiting ring and the limiting plate can prevent the push rod from being pulled out of the syringe barrel under the action of external force, thus effectively avoiding the situation of repeated use of the syringe. Description of the Drawings

[0012] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0013] Figure 1 is a schematic structural diagram of the present invention;

[0014] Figure 2 is a schematic cross-sectional structural diagram of the syringe body of the present invention;

[0015] Figure 3 This is a schematic structural diagram of the injection needle in the present utility model;

[0016] Figure 4 This is a schematic cross-sectional structural diagram of the protective cover and the injection needle in the present utility model;

[0017] Figure 5 In the present utility model Figure 2 An enlarged structural diagram located at position A;

[0018] Figure 6 In the present utility model Figure 4 An enlarged structural diagram located at position B.

[0019] In the figure: 1. Syringe body; 101. Barrel; 102. Nipple; 103. Rubber stopper; 104. Pusher rod; 2. Injection needle; 201. Connector; 202. Needle body; 203. Internal thread; 204. First limit ring; 3. Protective cover; 4. Flap; 5. Scoring groove; 6. Limit assembly; 601. Groove; 602. Limit bar; 7. Second limit ring; 8. Limit plate; 9. External thread. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0021] Please refer to Figures 1 - 6 , the present utility model provides the following technical solutions: A syringe for preventing the needle from detaching, including a syringe body 1, an injection needle 2 connected to the syringe body 1, and a protective cover 3 covering the outside of the injection needle 2. The syringe body 1 is composed of a barrel 101, a nipple 102, a rubber stopper 103, and a pusher rod 104. The nipple 102 is installed at the end of the barrel 101, the rubber stopper 103 is installed inside the barrel 101, and the pusher rod 104 is connected to the rubber stopper 103;

[0022] The injection needle 2 includes a connector 201 and a needle body 202 connected to the connector 201. An internal thread 203 is provided on the inner wall of the connector 201, and an external thread 9 is provided on the surface of the nipple 102. The connector 201 and the nipple 102 are fixed by screwing the internal thread 203 and the external thread 9. The protective cover 3 covers the outside of the connector 201. Flaps 4 are provided on both sides of the protective cover 3. A scoring groove 5 is provided at the end of the pusher rod 104 away from the rubber stopper 103;

[0023] A limiting component 6 is arranged inside the protective cover 3.

[0024] In this embodiment, the limiting component 6 includes grooves 601 formed on both sides inside the protective cover 3. A limiting bar 602 is connected to the bottom end of the groove 601. The limiting bar 602 is inclined. A first limiting ring 204 is arranged at the top of the connecting head 201. The size of the first limiting ring 204 matches the size of the bottom of the protective cover 3.

[0025] Specifically, when a medical staff holds the wing 4 to pick up the protective cover 3 and installs the protective cover 3 on the top of the connecting head 201, and then moves the protective cover 3 downward, the first limiting ring 204 will squeeze the limiting bar 602 so that the limiting bar 602 returns to the groove 601. When the first limiting ring 204 moves to the top of the limiting bar 602, the limiting bar 602 moves the end of the limiting bar 602 to the bottom of the first limiting ring 204 under the action of toughness. In this way, it can be avoided that the protective cover 3 can be separated from the connecting head 201 after installation, and further avoid the risk of needle stick injury.

[0026] In this embodiment, a second limiting ring 7 is arranged on the inner wall of the end of the syringe barrel 101 far from the nipple 102. A limiting plate 8 is installed on the surface of the end of the push rod 104 far from the rubber plug 103. The limiting plate 8 is located on one side of the breakable groove 5. The size of the limiting plate 8 matches the inner diameter size of the syringe barrel 101. When the rubber plug 103 is close to the end of the syringe barrel 101, the limiting plate 8 is located inside the syringe barrel 101 and close to the second limiting ring 7.

[0027] Specifically, after the injection is completed, the push rod 104 is pushed so that the rubber plug 103 fits the syringe barrel 101. During this process, the limiting plate 8 will move into the syringe barrel 101 and be blocked by the second limiting ring 7. Due to the existence of the breakable groove 5, the tail end of the push rod 104 can be easily broken. After the tail end of the push rod 104 is broken, it can be avoided that the push rod 104 is pulled out of the syringe barrel 101 again under the action of the second limiting ring 7, resulting in the reuse of the syringe.

[0028] In this embodiment, the size of the limiting bar 602 matches the size of the groove 601.

[0029] Specifically, when the first limiting ring 204 moves upward, it will squeeze the limiting bar 602. At this time, the limiting bar 602 will return to the groove 601, thus avoiding the limiting bar 602 affecting the installation of the protective cover 3.

[0030] Working principle: After the connector 201 and the nipple 102 are threadedly connected through the internal thread 203 and the external thread 9, it can avoid the injection needle 2 falling off from the syringe body 1 during injection. After injection, the push rod 104 can be broken, and after the push rod 104 is broken, under the action of the second limit ring 7 and the limit plate 8, it can avoid the push rod 104 being pulled out of the syringe barrel 101 again, resulting in the reuse of the syringe. After injection, when covering the protective cover 3 by pinching the wing 4, it can avoid medical staff from being pricked by the needle. After covering the protective cover 3, under the action of the limit assembly 6, it can avoid the protective cover 3 from falling off, further reducing the risk of medical staff being pricked by the needle and improving the safety of medical staff's work.

[0031] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A syringe with a needle detachment prevention function, comprising a syringe body (1), an injection needle (2) connected to the syringe body (1), and a protective cover (3) arranged outside the injection needle (2), characterized in that: The syringe body (1) is composed of a syringe (101), a nipple (102), a rubber plug (103) and a push rod (104); the nipple (102) is installed at the end of the syringe (101), the rubber plug (103) is installed in the syringe (101), and the push rod (104) is connected to the rubber plug (103); The injection needle (2) comprises a connector (201) and a needle body (202) connected to the connector (201); an inner wall of the connector (201) is provided with an internal thread (203); an outer thread (9) is provided on the surface of the nipple (102); the connector (201) and the nipple (102) are fixed by threading the internal thread (203) and the outer thread (9); the protective cover (3) is provided on the outside of the connector (201); wings (4) are provided on both sides of the protective cover (3); and an easy-to-break groove (5) is provided on one end of the push rod (104) away from the rubber plug (103); A limiting component (6) is arranged inside the protective cover (3).

2. A syringe with an anti-needle detachment function according to claim 1, characterized in that: The limiting assembly (6) comprises grooves (601) opened on both sides of the protective cover (3); the bottom end of the groove (601) is connected to a limiting stop bar (602); the limiting stop bar (602) is arranged at an angle; a first limiting ring (204) is arranged on the top of the connector (201); the size of the first limiting ring (204) matches the size of the bottom of the protective cover (3).

3. The syringe according to claim 1, characterized in that: A second limiting ring (7) is provided on the inner wall of one end of the syringe (101) away from the nipple (102), and a limiting plate (8) is installed on the surface of one end of the push rod (104) away from the rubber plug (103). The limiting plate (8) is located on one side of the easy-folding groove (5), and the size of the limiting plate (8) matches the inner diameter of the syringe (101).

4. A syringe with an anti-needle detachment function according to claim 3, characterized in that: When the rubber plug (103) is in close contact with the end of the syringe (101), the limiting plate (8) is located inside the syringe (101) and in close contact with the second limiting ring (7).

5. The syringe according to claim 2, characterized in that: The size of the limiting stop bar (602) matches the size of the groove (601).

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