Needle cover and pen type injector

Abstract

The utility model relates to the technical field of injectors, in particular to a needle cover and a pen type injector, the needle cover comprises a cover body and a connecting piece arranged on the cover body, the connecting piece comprises a driving part and a sealing part, the driving part comprises a plurality of sliding blocks, the sliding blocks are arranged on the outer wall of the edge of the opening face of the cover body, and the sealing part is arranged on the outer wall of the opening face of the cover body. The driving part further comprises a moving ring, and grooves corresponding to the sliding blocks are formed in the inner wall of the moving ring. The rubber ring, the movable ring and the guide ring are arranged, so that the effect of sealing the two ends is achieved, the multi-extrusion sealing effect is further achieved, external dust is prevented from entering, and the internal cleanliness is improved; by arranging the elastic supporting table, the connection stability between the cover body and the injection tube is further enhanced, the effect of stabilizing the hand of a user when the cover is pulled out can be achieved, the hand is prevented from moving downwards or shaking when holding the injection tube to pressurize, the use difficulty of the injector is reduced, and the use safety degree of the injector is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of syringe technology, and more specifically, to a needle cap and a pen-type syringe. Background Technology

[0002] Existing syringes are quite common, especially for people with unstable blood sugar. The use of pen syringes greatly improves the convenience of injecting insulin alone in daily life. For different patients, the amount and number of insulin injections are different. It is often necessary to load the insulin into the syringe first and then inject it after a certain time interval when going out. At this time, it is necessary not only to ensure the cleanliness of the needle cap to prevent dust from entering during the trip, but also to avoid large gaps in the connection that could cause excessive temperature changes in the internal insulin.

[0003] Therefore, it is necessary to provide needle caps and pen-type syringes with strong sealing properties. Utility Model Content

[0004] This invention provides a needle cap to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, this utility model provides a needle cap, comprising: a cap body and a connector disposed on the cap body. The connector includes a driving part and a sealing part. The driving part includes a plurality of sliders, which are disposed on the outer wall of the opening edge of the cap body. The driving part also includes a movable ring, the inner wall of which has a groove corresponding to the slider.

[0006] In a preferred embodiment, the slider is made of an elastic material.

[0007] In a preferred embodiment, the outer wall of the movable ring is provided with multiple annular ridges.

[0008] In a preferred embodiment, the sealing part includes a rubber ring, one end of which is fixed to the movable ring.

[0009] In a preferred embodiment, a guide ring is provided at the other end of the rubber ring.

[0010] In a preferred embodiment, the inner diameter of the rubber ring gradually decreases from the moving ring direction toward one end of the guide ring.

[0011] On the other hand, this embodiment also provides a pen-type syringe, including an injection tube and a needle cap as described above.

[0012] In a preferred embodiment, the injection tube has a pressing end and an injection end corresponding to the pressing end, and the needle cap is fitted over the injection end.

[0013] In a preferred embodiment, the injection end is provided with an elastic support.

[0014] In a preferred embodiment, the outer diameter of the support gradually decreases from the pressing end direction to the injection end direction.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] By setting rubber rings, moving rings and guide rings, the effect of sealing at both ends is achieved, thereby achieving a multi-compression sealing effect, preventing external dust and dirt from entering, improving internal cleanliness, and also enhancing the connection tightness to prevent the cover from being lost.

[0017] By setting up an elastic support, the connection stability between the cap and the injection tube is further enhanced, and the user's hand is stabilized when removing the cap, preventing the hand from moving down or shaking when holding the injection tube and applying pressure. This reduces the difficulty of using the syringe and enhances the safety of using the syringe. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a perspective view of the preferred embodiment of the needle cap of this utility model;

[0020] Figure 2 This is a perspective view of the preferred embodiment of the needle cap and pen-type syringe of this utility model;

[0021] Figure 3 This is a perspective view of the preferred embodiment of the injection tube of this utility model.

[0022] The components are: 1. Cover; 2. Slider; 3. Moving ring; 4. Groove; 5. Rubber ring; 6. Guide ring; 7. Injection tube; 8. Elastic support; 9. Injection end; 10. Pressing end. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0024] Please see Figure 1 .like Figure 1As shown, at least one embodiment provides a needle cap, including: a cap body 1 and a connector disposed on the cap body 1. The connector includes a driving part and a sealing part. The driving part includes a plurality of sliders 2 and a moving ring 3. The sliders 2 are made of elastic material. The sliders 2 are disposed on the outer wall of the opening edge of the cap body 1. The driving part also includes the moving ring 3, and the outer wall of the moving ring 3 is provided with a plurality of annular ridges. The inner wall of the moving ring 3 is provided with grooves 4 corresponding to the sliders 2. The sealing part includes a rubber ring 5 and a guide ring 6. Specifically, one end of the rubber ring 5 is fixed to the moving ring 3. The other end of the rubber ring 5 is provided with the guide ring 6. The inner diameter of the rubber ring 5 gradually decreases from the moving ring 3 towards the guide ring 6. The gradual decrease in the diameter of the rubber ring 5 enhances the sealing effect. In addition, both ends of the flexible rubber ring 5 are equipped with hardware. One end is used to move the connector as a whole, and the other end is used to support the overall shape, so that the connector can be placed at the connection position between the cover 1 and the injection tube 7. At this time, the rubber ring abuts against the outer walls of both, achieving a strong sealing effect. Specifically, the movement of the connector is mainly achieved by pushing or sliding the moving ring 3 up or down, causing it to press the slider 2 up or down. It should be added that there is a certain extrusion force between the slider 2 and the groove 4 on the moving ring 3. The applied up and down pushing and pulling force needs to be greater than the friction force generated by the extrusion to make the connector move as a whole. In summary, the flexible rubber ring 5 seals the connection gap. The moving ring 3 and the guide ring 6 abut against the outer walls of the cover 1 and the injection tube 7 respectively, achieving a sealing effect at both ends, thereby achieving a multi-compression sealing effect, preventing external dust and impurities from entering, improving internal cleanliness, and also enhancing the connection tightness to prevent the cover 1 from being lost.

[0025] Please continue reading. Figure 1 and combined Figures 2 to 3 , Figure 2 This is a perspective view of the preferred embodiment of the needle cap and pen-type syringe of this utility model; Figure 3 This is a perspective view of the preferred embodiment of the injection tube of this utility model. Figures 1 to 3As shown, a pen-type syringe includes an injection tube 7 and a needle cap as described above. The injection tube 7 has a pressing end 10 and an injection end 9 corresponding to the pressing end 10, with the needle cap fitted onto the injection end 9. Since a user injects alone, there is a step of fixing the syringe in the injection position for a certain period of time. During this step, the user needs to press the pressing end 10 with their thumb and hold the injection tube 7 with their other four fingers. This process requires downward force while maintaining stability of the syringe, making it quite difficult. Therefore, an elastic support 8 is provided on the injection end 9. The elastic support 8 can support the little finger, preventing the part holding the injection tube 7 from sliding down during the pressing period, and also helps stabilize the syringe, reducing the difficulty of single-person injection. The outer diameter of the elastic support 8 gradually decreases from the pressing end 10 towards the injection end 9. The top surface of the elastic support 8 is a supporting surface, providing a supporting effect, while the sides are inclined to allow the connecting parts to fit onto its surface. As its radius increases, the connection strength increases.

[0026] In summary, by setting the rubber ring 5, the moving ring 3, and the guide ring 6, a sealing effect is achieved at both ends, thereby achieving a multi-compression sealing effect, preventing external dust and impurities from entering, improving internal cleanliness, and also enhancing the connection tightness to prevent the cap 1 from being lost. By setting the elastic support 8, not only is the connection stability between the cap 1 and the injection tube 7 further enhanced, but it also stabilizes the user's hand when removing the cap, preventing the hand from moving down or shaking when holding the injection tube 7 and applying pressure, reducing the difficulty of using the syringe and enhancing the safety of using the syringe.

[0027] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A needle cap, characterized in that, include: The cover (1) and the connector provided on the cover (1) include a driving part and a sealing part. The driving part includes a plurality of sliders (2). The sliders (2) are provided on the outer wall of the opening edge of the cover (1). The driving part also includes a moving ring (3). The inner wall of the moving ring (3) is provided with a groove (4) corresponding to the slider (2).

2. The needle cap as described in claim 1, characterized in that: The slider (2) is made of elastic material.

3. The needle cap as described in claim 2, characterized in that: The outer wall of the movable ring (3) is provided with multiple annular ridges.

4. The needle cap as described in claim 3, characterized in that: The sealing part includes a rubber ring (5), one end of which is fixed to the movable ring (3).

5. The needle cap as described in claim 4, characterized in that: A guide ring (6) is provided at the other end of the rubber ring (5).

6. The needle cap as described in claim 5, characterized in that: The inner diameter of the rubber ring (5) gradually decreases from the direction of the moving ring (3) toward one end of the guide ring (6).

7. A pen-type syringe, characterized in that: It includes an injection tube (7) and a needle cap as described in any one of claims 1-6.

8. The pen-type syringe as described in claim 7, characterized in that: The injection tube (7) has a pressing end (10) and an injection end (9) corresponding to the pressing end (10), and the needle cap is fitted over the injection end (9).

9. The pen-type syringe as described in claim 8, characterized in that: An elastic support (8) is provided on the injection end (9).

10. The pen-type syringe as described in claim 9, characterized in that: The outer diameter of the support gradually decreases from the pressing end (10) towards the injection end (9).

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