Retractable needle for insulin syringe

Abstract

The utility model discloses a retractable needle for an insulin syringe, and relates to the technical field of insulin syringes, when the needle is used, a sliding plate slides forwards along a sliding groove formed in an injection head through a push block under the action of a spring, and then an insertion block is pressed to be driven downwards through a U-shaped elastic piece, so that the needle is retracted. When the push block moves forwards to the front end of the insertion block, the insertion block is pressed to be clamped with a clamping groove, through contraction of a spring, the clamping groove in the push block and the top end of the insertion block are extruded and clamped, the needle head of the sliding plate is moved out, work of the needle head is carried out, and after use is completed, the push block continues to be pushed forwards, so that the needle head is pushed forwards. When the syringe is used, the insertion block restores to the original position under the action of the elastic piece, the syringe needle restores to the interior of the injection head through the sliding plate under contraction of the spring, it is ensured that the syringe needle can rapidly and safely retract to the interior of the injection head through simple operation after use is completed, and damage possibly caused by exposure of the syringe needle is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of insulin syringes, in particular to a retractable needle for an insulin syringe. Background Technique

[0002] With the improvement of people's living standards, the incidence of diabetes shows an increasing trend. According to statistics, there are nearly 40 million diabetes patients in China at present. Research shows that early insulin injection treatment is beneficial to protecting the function of pancreatic islet β cells of patients and preventing the occurrence of complications. Therefore, the main means of treating diabetes is insulin injection.

[0003] The existing insulin syringes generally have a simple structure. After insulin injection is completed, medical staff need to put the protective cap on the injection needle again. However, in this way, because medical staff's hands need to be close to the injection needle area at a short distance, it is easy to cause medical staff's hands to be stabbed by the injection needle. After injection is completed, the needle usually remains exposed, increasing the risk of medical staff and patients being stabbed by the needle, and may also be contaminated because the needle is exposed to the external environment for a long time, thus affecting the hygiene and safety of injection.

[0004] Therefore, in view of this, research and improvement are carried out on the existing structural deficiencies, and a retractable needle for an insulin syringe is proposed. Content of the Utility Model

[0005] The purpose of the utility model is to provide a retractable needle for an insulin syringe to solve the problem that after injection is completed, the needle usually remains exposed, increasing the risk of medical staff and patients being stabbed by the needle as mentioned in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: a retractable needle for an insulin syringe, including a syringe body, the front end of the syringe body is connected with a connector through a detachable component, and the front end of the connector is fixedly connected with an injection head;

[0007] A slide plate is slidably connected inside the injection head, a needle is arranged at the center of the slide plate, a spring is fixedly connected to the inner wall edge of the slide plate, the other end of the spring is fixedly connected with the connector, and engaging components for locking the needle are arranged at both ends of the upper end of the slide plate.

[0008] Further, the detachable component includes a threaded tube fixedly connected to the front end wall of the syringe body, and a threaded groove is opened on one side of the connector close to the threaded tube.

[0009] Further, a telescopic sleeve rod is arranged inside the spring, and both ends of the telescopic sleeve rod are fixedly connected with the slide plate and the connector respectively.

[0010] Further, the engaging component includes an elastic member fixedly connected to the upper end face of the injection head, and a plug is fixedly connected to the upper end of the elastic member.

[0011] Further, a limiting ring is fixedly connected to the outer wall of the injection head, and a protective sleeve is attached to the outer wall of the injection head at the front end face of the limiting ring, and the protective sleeve is made of rubber material.

[0012] Further, push blocks are fixedly connected to the upper and lower ends of the sliding plate, and clamping grooves are formed in the inner walls of the push blocks.

[0013] Further, sliding grooves are formed at the upper and lower ends of the injection head.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] First: When using the needle of the present utility model, the sliding plate is pushed forward along the sliding groove formed in the injection head by the push block under the action of the spring, and then the plug is pressed and driven downward through the U-shaped elastic member. When the push block moves forward to the front end of the plug, the pressed plug is engaged with the clamping groove. Through the contraction of the spring, the clamping groove inside the push block is squeezed and engaged with the top end of the plug, so as to move out the needle of the sliding plate and perform the work of the needle. After use, the push block is pushed forward further, so that the clamping groove on the inner wall of the push block is separated from the plug, and the plug returns to its original position under the action of the elastic member. The needle returns to the inside of the injection head through the sliding plate under the contraction of the spring. After use, through simple operation, the needle can be quickly and safely retracted into the inside of the injection head, effectively avoiding the possible harm caused by the exposure of the needle.

[0016] Second: After the needle is retracted into the injection head, the protective sleeve made of rubber material is sleeved on the outer wall of the injection head and fits tightly, improving the sealing performance, which can isolate dust and other pollutants in the external environment, protect the injection head and the needle inside it from pollution, and thus ensure the hygiene and safety of the next use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the device main body;

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the connection of the connecting head;

[0019] Figure 3 It is a three-dimensional sectional structural schematic diagram of the injection head;

[0020] Figure 4 It is a three-dimensional structural schematic diagram of the connection between the clamping groove and the push block.

[0021] In the figure: 1. Syringe body; 101. Threaded tube; 102. Threaded groove; 2. Connector; 3. Injection head; 301. Slide plate; 302. Spring; 303. Telescopic sleeve rod; 4. Pusher block; 401. Card slot; 5. Slide groove; 6. Elastic member; 601. Insert block; 7. Needle; 8. Limit ring; 801. Protective sleeve. Detailed implementation mode

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0023] Embodiment 1

[0024] As Figure 1 - Figure 4 shown, a retractable needle for an insulin syringe includes a syringe body 1. The front end of the syringe body 1 is connected with a connector 2 through a detachable component. The front end of the connector 2 is fixedly connected with an injection head 3. The syringe body 1 and the connector 2 are connected through a detachable component to ensure the stability and convenience of the connection. The injection head 3 is fixedly connected to the front end of the connector 2 to form an integral body;

[0025] A slide plate 301 is slidably connected inside the injection head 3. A needle 7 is arranged at the center of the slide plate 301. A spring 302 is fixedly connected to the inner wall edge of the slide plate 301. The other end of the spring 302 is fixedly connected with the connector 2. Clamping components for locking the needle 7 are arranged at both ends of the upper end of the slide plate 301.

[0026] Furthermore, the detachable component includes a threaded tube 101 fixedly connected to the front end wall of the syringe body 1. A threaded groove 102 is opened on one side of the connector 2 close to the threaded tube 101. The connector 2 is threadedly connected with the syringe body 1 through the threaded groove 102 and the threaded tube 101 to realize the installation of the injection head 3.

[0027] Furthermore, a telescopic sleeve rod 303 is arranged inside the spring 302, and both ends of the telescopic sleeve rod 303 are fixedly connected with the slide plate 301 and the connector 2 respectively. The arranged slide plate 301 is elastically connected inside the injection head 3 through the spring 302 and the telescopic sleeve rod 303 to ensure the stability of the elastic connection of the spring 302 and is used for elastically stretching the needle.

[0028] Further, push blocks 4 are fixedly connected to the upper and lower ends of the skateboard 301. A clamping groove 401 is formed in the inner wall of the push block 4. Sliding grooves 5 are formed in the upper and lower ends of the injection head 3 to ensure the stability of the push block 4 sliding along the sliding grooves 5 on the injection head 3.

[0029] Further, the engaging component includes an elastic member 6 fixedly connected to the upper end face of the injection head 3. An insertion block 601 is fixedly connected to the upper end of the elastic member 6. When using the needle 7, the skateboard 301 slides forward along the sliding groove 5 formed on the injection head 3 through the push block 4 under the action of the spring 302. Then, the insertion block 601 is pressed and driven downward through the U-shaped elastic member 6. When the push block 4 moves forward to the front end of the insertion block 601, the pressed insertion block 601 is engaged with the clamping groove 401. Through the contraction of the spring 302, the clamping groove 401 inside the push block 4 is squeezed and engaged with the top end of the insertion block 601, so as to remove the needle 7 of the skateboard 301 and perform the work of the needle 7. After use, the push block 4 is pushed forward further, separating the clamping groove 401 on the inner wall of the push block 4 from the insertion block 601. The insertion block 601 returns to its original position under the action of the elastic member 6, and the needle 7 returns to the inside of the injection head 3 through the contraction of the spring 302 of the skateboard 301. It is ensured that after use, through a simple operation, the needle 7 can be quickly and safely retracted into the inside of the injection head 3, effectively avoiding the possible harm caused by the exposure of the needle 7.

[0030] Embodiment 2

[0031] As Figure 1 and Figure 4 shown, a retractable needle for an insulin syringe proposed by the present utility model, compared with Embodiment 1, as another implementation manner of the present utility model, a limiting ring 8 is fixedly connected to the outer wall of the injection head 3. A protective cover 801 is attached to the front end face of the limiting ring 8 and is in contact with the outer wall of the injection head 3. And the protective cover 801 is made of rubber material. Finally, after the needle 7 retracts into the inside of the injection head 3, the rubber material protective cover 801 is sleeved on the outer wall of the injection head 3 and fits tightly, improving the sealing performance, which can isolate dust and other pollutants in the external environment, protecting the injection head 3 and the needle 7 inside it from being polluted, thus ensuring the hygiene and safety of the next use.

[0032] Working principle: First, connect the connector 2 to the syringe body 1 through the thread groove 102 and the threaded tube 101 by threading to install the injection head 3. Then, when using the needle 7, the slide plate 301 slides forward along the chute 5 opened on the injection head 3 under the action of the spring 302 through the push block 4. Then, press the insertion block 601 to drive it downward through the U-shaped elastic member 6. When the push block 4 moves forward to the front end of the insertion block 601, the pressing insertion block 601 engages with the card slot 401. Through the contraction of the spring 302, the card slot 401 inside the push block 4 squeezes and engages with the top of the insertion block 601, so as to move out the needle 7 of the slide plate 301 and perform the work of the needle 7. After use, push the push block 4 forward a little further to separate the card slot 401 on the inner wall of the push block 4 from the insertion block 601. The insertion block 601 returns to its original position under the action of the elastic member 6, and the needle 7 returns to the inside of the injection head 3 under the contraction of the spring 302. Finally, put the protective sleeve 801 made of rubber material on the outer wall of the injection head 3 and fit it tightly to improve the sealing performance.

[0033] This is the working principle of the retractable needle for an insulin syringe.

[0034] The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the present invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and enable those of ordinary skill in the art to understand the present invention and thus design various embodiments with various modifications suitable for specific purposes.

Claims

1. A retractable needle for an insulin syringe, characterized in that: It includes a syringe body (1), the front end of the syringe body (1) is connected with a connector (2) through a detachable component, and the front end of the connector (2) is fixedly connected with an injection head (3); A slide plate (301) is slidably connected inside the injection head (3), a needle (7) is arranged at the center of the slide plate (301), a spring (302) is fixedly connected to the inner wall edge of the slide plate (301), the other end of the spring (302) is fixedly connected with the connector (2), and engaging components for locking the needle (7) are arranged at both ends of the upper end of the slide plate (301).

2. The retractable needle for an insulin syringe according to claim 1, wherein, The detachable component includes a threaded tube (101) fixedly connected to the front end wall of the syringe body (1), and a threaded groove (102) is opened on one side of the connector (2) close to the threaded tube (101).

3. The retractable needle for an insulin syringe according to claim 1, wherein, A telescopic sleeve rod (303) is arranged inside the spring (302), and both ends of the telescopic sleeve rod (303) are fixedly connected with the slide plate (301) and the connector (2) respectively.

4. A retractable needle for an insulin syringe according to claim 1, wherein, The engaging component includes an elastic member (6) fixedly connected to the upper end surface of the injection head (3), and a plug (601) is fixedly connected to the upper end of the elastic member (6).

5. A retractable needle for an insulin syringe according to claim 1, wherein, A limiting ring (8) is fixedly connected to the outer wall of the injection head (3), a protective sleeve (801) is attached to the front end surface of the limiting ring (8) on the outer wall of the injection head (3), and the protective sleeve (801) is made of rubber material.

6. The retractable needle for an insulin syringe according to claim 1, wherein, Push blocks (4) are fixedly connected to the upper and lower ends of the slide plate (301), and a clamping groove (401) is opened on the inner wall of the push block (4).

7. A retractable needle for an insulin syringe according to claim 1, wherein, Chutes (5) are opened at the upper and lower ends of the injection head (3).

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