Safe injection device for injecting insulin

Abstract

The utility model discloses a safety injection device for injecting insulin, which comprises a needle seat, and an inner sheath and a fixing sleeve which are sequentially sleeved outside the needle seat, a needle tube penetrates through the inner sheath to be fixed with the needle seat, the inner sheath is connected with the needle seat through a clamping point, the fixing sleeve is connected with the needle seat through a buckle, and a protruding outer edge is arranged at the bottom of the inner sheath. An elastic protruding block is arranged on the inner wall of the fixing sleeve, when the outer edge moves to the position above the elastic protruding block, the inner sheath is prevented from being pressed downwards, a spring is installed on the top of the needle base, one end of the spring is connected with the needle base, and the other end of the spring makes contact with the inner sheath. By designing a safety protection structure, the risk of cross infection caused by accidental touch due to the fact that a traditional common needle tube is exposed outside after injection is completed is avoided, and meanwhile the phenomenon that an injection needle is reused can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a safe injection device for injecting insulin. Background Art

[0002] Insulin injection devices (such as insulin pens and injection needles) have been widely used as a method of treating diabetes. Their main function is to accurately infuse insulin into the body of diabetic patients through the injection device to achieve the purpose of controlling the patient's blood sugar. Moreover, with the increasing number of diabetic patients, the demand for insulin injection devices is increasing.

[0003] Traditional ordinary injection needles include a needle holder, a needle tube and an outer protective shell. After removing the protective shell before use, the insulin injection needle is directly exposed to the outside. After use, there is no safety protection structure, which makes it easy to accidentally touch the needle and cause cross infection. At the same time, due to the lack of necessary protection structure, this type of injection needle can be used again after use, which poses a very high risk of infection. Utility Model Content

[0004] The technical problem to be solved by the utility model is: to overcome the defects of the above prior art and provide a safe injection device for injecting insulin with a safety protection structure to prevent accidental touch and avoid infection risks.

[0005] The technical solution adopted by the utility model to solve the technical problem is: a safe injection device for injecting insulin, comprising a needle seat, and an inner sheath and a fixed sheath which are sequentially sleeved outside the needle seat, the needle tube passes through the inner sheath and is fixed to the needle seat, the inner sheath is connected to the needle seat through a card point, the fixed sheath is connected to the needle seat through a buckle, a protruding outer edge is arranged at the bottom of the inner sheath, an elastic convex block is arranged on the inner wall of the fixed sheath, when the outer edge moves to above the elastic convex block, the inner sheath is prevented from being pressed down, a spring is installed on the top of the needle seat, one end of the spring is connected to the needle seat, and the other end is in contact with the inner sheath.

[0006] Furthermore, the needle tube and the needle seat are fixedly connected by glue dispensing.

[0007] Furthermore, the clamping points are arranged on both sides of the needle seat, and correspondingly, guide grooves are provided on both sides of the inner sheath to form a knife-shaped paddle.

[0008] Furthermore, a clamping block is provided below the needle seat, and a bayonet is provided at a corresponding position below the fixing sleeve, and the bayonet cooperates with the clamping block so that the fixing sleeve and the needle seat are clamped and connected.

[0009] Furthermore, the outer wall of the fixing sleeve is provided with a plurality of n-shaped notches arranged in an array in the circumferential direction, so that an elastic member capable of undergoing inner and outer shape deformation is formed in the middle, and the elastic protrusion is arranged on the top of the elastic member close to one side of the inner sleeve.

[0010] Furthermore, the number of the notches is ≥2.

[0011] Furthermore, a surface of the elastic protrusion in contact with the outer edge of the inner sheath is arranged as an inclined surface, and the outer edge is arranged as an inclined surface complementary to the outer edge.

[0012] Furthermore, the distance from the upper edge of the elastic member to the lower edge of the notch is equal to the thickness of the outer edge of the inner sheath.

[0013] The safe injection device for insulin injection of the utility model has the following beneficial effects:

[0014] 1. The device is designed with a safety protection structure with a simple structure and clever coordination, which avoids the risk of accidental contact and cross infection caused by the traditional ordinary needle tube being exposed after injection, and also prevents the injection needle from being reused;

[0015] 2. During use, the inner sheath is pressed downward by external force, and the card point of the needle seat moves upward relative to the inner sheath due to the guide groove of the inner sheath. When it reaches the top of the guide groove, the length of the needle tube is completely exposed. After the external force disappears, the inner sheath bounces upward under the action of the spring, and the card point reaches the left guide groove of the knife-shaped paddle. At the same time, the outer edge of the inner sheath moves to the elastic protrusion of the fixed sleeve, and the inner sheath is blocked from being pressed down, and the needle tube is completely wrapped by the inner sheath, which achieves the purpose of safety protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the explosion structure of the utility model;

[0019] Figure 3 It is a schematic diagram of the initial position of the card point of the utility model;

[0020] Figure 4 It is a front structural schematic diagram of the utility model;

[0021] Figure 5 yes Figure 4 AA section diagram of ;

[0022] Figure 6 It is a structural schematic diagram of the needle seat of the utility model;

[0023] Figure 7 It is a structural schematic diagram of the inner sheath of the utility model;

[0024] Figure 8 It is a structural schematic diagram of the fixing sleeve of the utility model;

[0025] In the figure: 1. needle tube, 2. inner sheath, 21. knife-shaped pick, 22. outer edge, 23. guide groove, 3. fixing sleeve, 31. bayonet, 32. notch, 33. elastic member, 34. elastic protrusion, 4. spring, 5. needle seat, 51. clamping point, 52. clamping block. DETAILED DESCRIPTION

[0026] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0027] As shown in the figure, a safe injection device for injecting insulin comprises a needle seat 5, and an inner sheath 2 and a fixing sheath 3 which are sequentially sleeved outside the needle seat 5.

[0028] The needle tube 1 passes through the inner sheath 2 and is fixed to the needle seat 5 by glue dispensing.

[0029] The inner sheath 2 is connected to the needle seat 5 via a clamping point 51 , which is disposed on both sides of the needle seat 5 . Accordingly, guide grooves 23 are provided on both sides of the inner sheath 2 to form a knife-shaped paddle 21 to guide the clamping point 51 .

[0030] The fixing sleeve 3 is connected to the needle seat 5 by a buckle, a clamping block 52 is arranged below the needle seat 5, and a bayonet 31 is arranged at a corresponding position below the fixing sleeve 3. The bayonet 31 cooperates with the clamping block 52 to make the fixing sleeve 3 and the needle seat 5 tightly connected.

[0031] A protruding outer edge 22 is provided at the bottom of the inner sheath 2, and an elastic protrusion 34 is provided on the inner wall of the fixed sheath 3. When the outer edge 22 moves above the elastic protrusion 34, the inner sheath 2 is prevented from being pressed down. A spring 4 is installed on the top of the needle seat 5, one end of the spring 4 is connected to the needle seat 5, and the other end is in contact with the inner sheath 2.

[0032] The outer wall of the fixing sleeve 3 is provided with a plurality of n-shaped notches 32 arranged in an array in the circumferential direction, so that an elastic member 33 capable of inner and outer shape deformation is formed in the middle. The number of the notches 32 is ≥2, and an elastic protrusion 34 is arranged on the top of the elastic member 33 close to the inner sleeve 2.

[0033] The side of the elastic protrusion 34 that contacts the outer edge 22 of the inner sheath 2 is set as an inclined surface, and the outer edge 22 is set with an inclined surface that complements it, so that the inner sheath 2 can smoothly move to the top of the elastic protrusion 34, and the elastic protrusion 34 acts as a stop. The distance from the upper edge of the elastic member 33 to the lower edge of the notch 32 is equal to the thickness of the outer edge 22 of the inner sheath 2, so that the inner sheath 2 is just stuck in the notch 32.

[0034] During use, the inner sheath 2 is pressed downward by an external force, and the clamping point 51 of the needle seat 5 moves upward relative to the inner sheath 2 due to the action of the guide groove 23 of the inner sheath 2. When it reaches the top of the guide groove 2, the length of the needle tube 1 is completely exposed. After the external force disappears, the inner sheath 2 bounces upward under the action of the spring 4, and the clamping point 51 reaches the left guide groove of the knife-shaped paddle 21. At the same time, the outer edge 22 of the inner sheath 2 moves to the elastic protrusion 34 of the fixed sleeve 3, and the inner sheath 2 is blocked from being pressed down, and the needle tube 1 is completely wrapped by the inner sheath 2, which achieves the purpose of safety protection.

[0035] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A safe injection device for injecting insulin, characterized in that: The invention comprises a needle seat (5), and an inner sheath (2) and a fixing sheath (3) which are sequentially sleeved outside the needle seat (5); the needle tube (1) passes through the inner sheath (2) and is fixed to the needle seat (5); the inner sheath (2) and the needle seat (5) are connected via a clamping point (51); the fixing sheath (3) and the needle seat (5) are connected via a buckle; a protruding outer edge (22) is arranged at the bottom of the inner sheath (2); an elastic protrusion (34) is arranged on the inner wall of the fixing sheath (3); when the outer edge (22) moves to above the elastic protrusion (34), the inner sheath (2) is prevented from being pressed down; a spring (4) is installed at the top of the needle seat (5); one end of the spring (4) is connected to the needle seat (5) and the other end is in contact with the inner sheath (2).

2. A safe insulin injection device according to claim 1, characterized in that: The needle tube (1) and the needle seat (5) are fixedly connected by glue dispensing.

3. A safe insulin injection device according to claim 1, characterized in that: The clamping points (51) are arranged on both sides of the needle seat (5), and correspondingly, guide grooves (23) are provided on both sides of the inner sheath (2) to form a knife-shaped paddle (21).

4. A safe insulin injection device according to claim 1, characterized in that: A clamping block (52) is arranged below the needle seat (5), and a bayonet (31) is arranged at a corresponding position below the fixing sleeve (3); the bayonet (31) cooperates with the clamping block (52) so that the fixing sleeve (3) and the needle seat (5) are clamped and connected.

5. A safe insulin injection device according to claim 1, characterized in that: The outer wall of the fixing sleeve (3) is provided with a plurality of n-shaped notches (32) arranged in an array in the circumferential direction, so that an elastic member (33) capable of undergoing internal and external shape deformation is formed in the middle, and the elastic protrusion (34) is arranged on the top of the elastic member (33) close to the inner sleeve (2).

6. A safe insulin injection device according to claim 5, characterized in that: The number of the notches (32) is ≥2.

7. A safe insulin injection device according to claim 5, characterized in that: The side of the elastic protrusion (34) that contacts the outer edge (22) of the inner sheath (2) is arranged as an inclined surface, and the outer edge (22) is arranged as an inclined surface that is complementary to the outer edge (22).

8. A safe insulin injection device according to claim 5, characterized in that: The distance from the upper edge of the elastic member (33) to the lower edge of the notch (32) is equal to the thickness of the outer edge (22) of the inner sheath (2).

Images