Syringe

Abstract

The utility model belongs to the technical field of medical instruments, particularly relates to an injector, and aims to solve the problems of pain and discomfort of children during injection, increase of technical difficulty of injection, increase of risks of stimulation and injury and inconvenience in use due to an existing longer needle head. A connecting seat is fixedly arranged in the base, a needle head is arranged in the connecting seat, an injection cylinder used for containing medicine is arranged at the top of the base, a piston rod is arranged in the injection cylinder in a sliding mode, and one end of the needle head can be inserted into the injection cylinder and the other end of the needle head can be inserted into the skin by pressing the injection cylinder downwards. Injection action can be performed by pushing the piston rod; by pressing and rotating the pressing cap, not only can the injection action be carried out, but also the needle pulling action can be automatically carried out after the injection is completed, the use process is safer, the depth of the needle head penetrating into the skin can be adjusted, and the needle head can be conveniently used by different people.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a syringe. Background Art

[0002] Traditional vaccine syringes are usually made of plastic materials and are usually transparent in appearance. The syringe barrel is a long plastic tube with scales marked on it, which is used to measure and control the dosage of the liquid medicine or vaccine. The piston part can be pushed during injection to control the in and out of the liquid medicine. The needle is usually made of metal, with a tip for injection and the other end connected to the syringe barrel. The syringe cap is used to protect the needle to prevent contamination or accidental puncture.

[0003] Existing syringes have the following disadvantages during use: the longer needle causes pain and discomfort to children during injection, which increases the technical difficulty of injection. If the medical staff is not skilled or the child's muscle tissue is thin, it will lead to inaccurate positioning or too deep depth, thus affecting the accuracy of injection. It also increases the risk of irritation and injury, especially during the injection action, it may accidentally pierce the blood vessels or other tissues, causing bleeding or other adverse reactions, and is inconvenient to use. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art that a long needle causes pain and discomfort to children during injection, increases the technical difficulty of injection, increases the risk of irritation and injury, and is inconvenient to use, and to propose a syringe.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The syringe comprises a base, a connection seat is fixedly arranged in the base, a needle is arranged in the connection seat, a syringe for containing medicine is arranged on the top of the base, a piston rod is slidably arranged in the syringe, and pressing the syringe downward can make one end of the needle insert into the syringe and the other end insert into the skin, and the injection action can be performed by pushing the piston rod;

[0007] The inner liner is fixedly arranged on the top of the connecting seat, the syringe is slidably arranged in the inner liner, an inner shell is fixedly arranged on the outer wall of the inner liner, an outer shell is arranged on the outer side of the inner shell, and the outer shell is split and plugged with the base to protect the syringe;

[0008] A reset mechanism is provided on the syringe and is used to control the needle to automatically withdraw after the injection is completed;

[0009] The limiting mechanism is arranged on the injection barrel and is used to control the depth of the needle penetrating into the skin.

[0010] In a possible design, the reset mechanism includes a sliding plate slidably arranged in the connecting seat, the needle is passed through and fixed on the top of the sliding plate, the outer wall sliding sleeve of the needle is provided with a fixed plate, the fixed plate is fixed in the connecting seat and is located below the sliding plate, the outer wall sleeve of the needle is provided with a third spring, and the two ends of the third spring are respectively fixedly connected to the sliding plate and the side of the fixed plate close to each other, so as to drive the sliding plate to reset upward.

[0011] In a possible design, a rubber plug is provided at the bottom of the syringe, which can seal the syringe when not subjected to external force. A second spring is provided on the outer wall of the needle, and two ends of the second spring are respectively fixedly connected to the rubber plug and the side of the sliding plate close to each other.

[0012] In a possible design, the limiting mechanism includes a fixing ring sleeved on the outer wall of the injection barrel, the fixing ring is fixed to the inner wall of the inner liner, the outer wall of the injection barrel is threadedly sleeved with an outer screw ring, the outer screw ring is slidably arranged in the inner liner, and the outer screw ring and the fixing ring are used in combination to limit the moving distance.

[0013] In one possible design, a push cap is slidably provided on the top of the inner liner to increase the contact area between the finger and the piston rod, the top of the piston rod is fixedly connected to the push cap, the inner wall of the push cap is slidably provided with an extension cylinder, the bottom end of the extension cylinder is fixedly connected to the injection cylinder, the outer wall of the piston rod is sleeved with a first spring, the two ends of the first spring are respectively fixedly connected to the side of the push cap and the injection cylinder close to each other, the outer wall of the piston rod is fixedly sleeved with a nut seat, and the nut seat is slidably provided in the injection cylinder for limiting the piston rod.

[0014] In a possible design, the syringe is made of transparent glass, and one side of the outer shell, inner shell and liner is provided with an observation window for observing the liquid medicine in the syringe.

[0015] In the present application, when in use, the housing is removed from the base, the base is placed in the injection position, and then the pressing cap is pressed downward to drive the syringe downward. The downward movement of the syringe drives the rubber stopper to move, and the needle passes through the rubber stopper into the syringe;

[0016] Then press the pressing cap downward to drive the sliding plate downward through the rubber plug. The downward movement of the sliding plate can drive the needle to move downward until the outer screw ring contacts the fixing ring. At this time, the needle is inserted into the skin.

[0017] Continuing to press the push cap downwards can drive the piston rod to move downwards, push out the liquid medicine in the syringe, and inject it into the skin;

[0018] When the hand releases the pressing cap, the sliding plate can be reset under the action of the third spring, and the needle is pulled out of the skin, the injection barrel can be reset upward under the action of the second spring, and the pressing cap can be reset under the action of the first spring;

[0019] When it is necessary to adjust the depth of the needle penetrating into the skin, rotating the pressing cap can drive the piston rod to rotate, and the rotation of the piston rod can drive the syringe barrel to rotate through the nut seat, and the rotation of the syringe barrel can drive the outer screw ring to move on the syringe barrel, and adjust the distance between the outer screw ring and the fixed ring, thereby adjusting the depth of the needle penetrating into the skin.

[0020] In the utility model, the syringe can not only drive the needle into the syringe barrel by pressing the pressing cap, but also drive the needle to pierce the skin, and at the same time drive the piston rod to move in the syringe barrel to perform the injection action, so that it is convenient for injection, and the needle can be automatically removed after the injection is completed, so that the needle will not tilt during the removal process, thereby avoiding secondary puncture of the skin;

[0021] In the utility model, the syringe drives the syringe barrel to rotate by rotating the pressing cap, so that the outer spiral ring moves on the syringe barrel, and the distance between the outer spiral ring and the fixing ring is adjusted, so that the depth of the needle penetrating into the skin can be adjusted, making it easy to use;

[0022] In the utility model, not only the injection action can be performed by pressing and rotating the pressing cap, but also the needle can be automatically removed after the injection is completed. It is safer during use and the depth of the needle penetrating into the skin can be adjusted, which is convenient for use by different groups of people. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of the syringe proposed by the utility model;

[0024] Figure 2 This is a schematic cross-sectional view of the syringe provided by the utility model;

[0025] Figure 3 This is a schematic diagram of the cross-sectional structure of the injection barrel of the syringe proposed by the utility model.

[0026] In the figure: 1. base; 2. outer shell; 3. inner shell; 4. liner; 5. syringe barrel; 6. piston rod; 7. pressing cap; 8. connecting seat; 9. fixing plate; 10. needle; 12. extension tube; 13. first spring; 14. nut seat; 15. outer screw ring; 16. fixing ring; 17. rubber plug; 18. sliding plate; 19. second spring; 20. third spring. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0028] Example 1

[0029] Reference Figure 1-Figure 3 , a syringe, which is used in the field of medical devices, comprises: a base 1, a connection seat 8 is fixedly provided in the base 1, a needle 10 is provided in the connection seat 8, a syringe 5 for containing medicine is provided on the top of the base 1, a piston rod 6 is slidably provided in the syringe 5, and pressing the syringe 5 downward can make one end of the needle 10 inserted into the syringe 5 and the other end inserted into the skin, and the injection action can be performed by pushing the piston rod 6;

[0030] The inner liner 4 is fixedly arranged on the top of the connecting seat 8, and the syringe 5 is slidably arranged in the inner liner 4. The outer wall of the inner liner 4 is fixedly provided with an inner shell 3, and the outer side of the inner shell 3 is provided with an outer shell 2. The outer shell 2 is split and plugged with the base 1 to protect the syringe 5;

[0031] A reset mechanism is provided on the syringe 5 and is used to control the needle 10 to be automatically withdrawn after the injection is completed;

[0032] The limiting mechanism is arranged on the syringe 5 and is used to control the depth of the needle 10 penetrating into the skin. By pushing the syringe 5, the needle 10 can be inserted into the syringe 5 and penetrated into the skin, and pushing the piston rod 6 can push the liquid medicine in the syringe 5 into the skin. After the injection is completed, the needle can be automatically removed through the resetting mechanism. Before use, the depth of the needle 10 penetrating into the skin can also be controlled by the limiting mechanism, making it easy to use. At the same time, the bottom end of the base 1 is lace-shaped, which can attract children's attention. It adopts a childlike way and integrates it into the act of injection, reducing children's fear and resistance to injection.

[0033] The reset mechanism includes a sliding plate 18 slidably arranged in the connecting seat 8, and the needle 10 is fixedly arranged on the top of the sliding plate 18. The outer wall of the needle 10 is slidingly sleeved with a fixing plate 9, and the fixing plate 9 is fixedly arranged in the connecting seat 8 and is located below the sliding plate 18. The outer wall of the needle 10 is sleeved with a third spring 20, and the two ends of the third spring 20 are respectively fixedly connected to the sliding plate 18 and the side of the fixing plate 9 close to each other, and are used to drive the sliding plate 18 to reset upward. When the injection barrel 5 moves downward, the needle 10 can be inserted into the injection barrel 5. Continuing to move downward can drive the sliding plate 18 to move and squeeze the third spring 20, and drive the needle 10 to pierce the skin. When the injection barrel 5 is released, the sliding plate 18 can move upward and reset under the action of the third spring 20, and drive the needle 10 to be pulled out from the skin, which is more stable when pulled out.

[0034] A rubber plug 17 is provided at the bottom of the syringe 5. The rubber plug 17 can seal the syringe 5 when not subjected to external force. A second spring 19 is provided on the outer wall of the needle 10. The two ends of the second spring 19 are respectively fixedly connected to the rubber plug 17 and the side of the sliding plate 18 close to each other. When moving downward, the needle 10 can be inserted into the rubber plug 17 and extend into the syringe 5 to allow the drug solution to flow. When the syringe 5 is released, the syringe 5 can move upward under the action of the second spring 19, and can drive the needle 10 to be pulled out of the rubber plug 17.

[0035] The limiting mechanism includes a fixing ring 16 sleeved on the outer wall of the injection barrel 5, the fixing ring 16 is fixed on the inner wall of the inner liner 4, the outer wall of the injection barrel 5 is threadedly sleeved with an outer screw ring 15, the outer screw ring 15 is slidably arranged in the inner liner 4, the outer screw ring 15 and the fixing ring 16 are used together to limit the moving distance, and the outer screw ring 15 can be driven to move on the injection barrel 5 by rotating the injection barrel 5, and the distance between the outer screw ring 15 and the fixing ring 16 can be adjusted to adjust the moving distance of the injection barrel 5, thereby adjusting the depth of the needle 10 penetrating the skin.

[0036] Example 2

[0037] refer to Figure 1-Figure 3 , improved on the basis of Example 1:

[0038] The syringe 5 is made of transparent glass, and observation windows are provided on one side of the outer shell 2, the inner shell 3 and the inner liner 4 for observing the liquid medicine in the syringe 5. The syringe 5 made of transparent glass and the observation window plate can be used in conjunction to conveniently observe the usage of the liquid medicine in the syringe 5.

[0039] A pressing cap 7 is slidably provided on the top of the inner liner 4 for increasing the contact area between the finger and the piston rod 6. The top of the piston rod 6 is fixedly connected to the pressing cap 7. The inner wall of the pressing cap 7 is slidably provided with an extension tube 12. The bottom end of the extension tube 12 is fixedly connected to the injection cylinder 5. The outer wall of the piston rod 6 is sleeved with a first spring 13. The two ends of the first spring 13 are respectively fixedly connected to the side close to each other of the pressing cap 7 and the injection cylinder 5. The outer wall of the piston rod 6 is fixedly sleeved with a nut seat 14. The nut seat 14 is slidably provided in the injection cylinder 5 and is used to limit the piston rod 6. By pressing the pressing cap 7, the injection cylinder 5 can be driven to move downward through the first spring 13, driving the needle 10 to move. Continuing to move downward can drive the piston rod 6 to move in the injection cylinder 5, and when the pressing cap 7 is released, the piston rod 6 can be reset under the action of the first spring 13.

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A syringe comprising a base (1), characterized in that A connecting seat (8) is fixedly provided in the base (1), a needle (10) is provided in the connecting seat (8), a syringe (5) for containing medicine is provided on the top of the base (1), a piston rod (6) is slidably provided in the syringe (5), and by pressing the syringe (5) downward, one end of the needle (10) can be inserted into the syringe (5) and the other end can be inserted into the skin, and an injection action can be performed by pushing the piston rod (6); An inner liner (4), the inner liner (4) is fixedly arranged on the top of the connecting seat (8), the injection cylinder (5) is slidably arranged in the inner liner (4), an inner shell (3) is fixedly arranged on the outer wall of the inner liner (4), an outer shell (2) is arranged on the outer side of the inner shell (3), and the outer shell (2) is split and plugged with the base (1) to protect the injection cylinder (5); A reset mechanism is arranged on the injection barrel (5) and is used to control the needle (10) to be automatically removed after the injection is completed; The limiting mechanism is arranged on the injection barrel (5) and is used to control the depth of the needle (10) penetrating the skin.

2. The syringe according to claim 1, characterized in that The reset mechanism comprises a sliding plate (18) slidably arranged in the connecting seat (8), the needle (10) penetrates and is fixedly arranged on the top of the sliding plate (18), the outer wall of the needle (10) is slidingly sleeved with a fixing plate (9), the fixing plate (9) is fixedly arranged in the connecting seat (8) and is located below the sliding plate (18), and the outer wall of the needle (10) is sleeved with a third spring (20), and the two ends of the third spring (20) are respectively fixedly connected to the sliding plate (18) and the fixed plate (9) on one side close to each other, so as to drive the sliding plate (18) to reset upward.

3. The syringe according to claim 2, characterized in that A rubber plug (17) is provided at the bottom of the injection barrel (5), and the rubber plug (17) can seal the injection barrel (5) when no external force is applied. A second spring (19) is sleeved on the outer wall of the needle (10), and two ends of the second spring (19) are respectively fixedly connected to the rubber plug (17) and one side of the sliding plate (18) that is close to each other.

4. The syringe according to claim 1, characterized in that The limiting mechanism comprises a fixing ring (16) sleeved on the outer wall of the injection barrel (5), the fixing ring (16) being fixedly mounted on the inner wall of the inner liner (4), an outer screw ring (15) being threadedly sleeved on the outer wall of the injection barrel (5), the outer screw ring (15) being slidably mounted in the inner liner (4), and the outer screw ring (15) and the fixing ring (16) being used in combination to limit the moving distance.

5. The syringe according to claim 1, characterized in that A pressing cap (7) is slidably provided on the top of the inner liner (4) for increasing the contact area between the finger and the piston rod (6); the top end of the piston rod (6) is fixedly connected to the pressing cap (7); the inner wall of the pressing cap (7) is slidably provided with an extension tube (12); the bottom end of the extension tube (12) is fixedly connected to the injection cylinder (5); the outer wall of the piston rod (6) is sleeved with a first spring (13); the two ends of the first spring (13) are respectively fixedly connected to the mutually adjacent sides of the pressing cap (7) and the injection cylinder (5); the outer wall of the piston rod (6) is fixedly sleeved with a nut seat (14); the nut seat (14) is slidably provided in the injection cylinder (5) for limiting the piston rod (6).

6. The syringe according to any one of claims 1 to 5, characterized in that: The syringe barrel (5) is made of transparent glass, and one side of the outer shell (2), the inner shell (3) and the inner liner (4) is provided with an observation window for observing the liquid medicine in the syringe barrel (5).

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