CN108042886B

CN108042886B - Simple needleless injector

Info

Publication number: CN108042886B
Application number: CN201711454992.5A
Authority: CN
Inventors: 向俊蓓; 刘绵学; 刘泽木
Original assignee: Sichuan Nursing Vocational College
Current assignee: Sichuan Nursing Vocational College
Priority date: 2017-12-27
Filing date: 2017-12-27
Publication date: 2021-05-11
Anticipated expiration: 2037-12-27
Also published as: CN108042886A

Abstract

The invention discloses a simple needleless injector, belonging to the field of medical appliances; it comprises an injector part (1) and a pressure providing part (2); the injector part (1) consists of an outer sleeve (4), a core bar (5), a rubber plug (6), an injection head (3) and a liquid pumping head (22); the pressure providing part (2) consists of a shell (23), a pressure shaft (24) and a spring (11); the method is characterized in that: the omega-shaped stainless steel part (13) of the injection head (3) is provided with 1-10 micropores (15) with the diameter of 1-10 mu; the liquid pumping head (22) is a plastic injection needle; the spring (11) of the pressure providing part (2) is a pressure spring with the pressure more than or equal to 1 kg; when the injection device is used, the liquid medicine is well pumped by the liquid pumping head (22), the injection head (3) is replaced, the pressure providing part (2) of the injector part (1) is connected, the injection head (3) is aligned to an injection part, the spring (11) is triggered, and the liquid medicine is injected into muscles at high pressure to complete injection; it is suitable for intramuscular injection, and can be used for insulin and vaccine injection.

Description

Simple needleless injector

Technical Field

The invention relates to the technical field of medical instruments, in particular to an injector without an injection needle, and particularly relates to the principle and the structure of the injector.

Background

In order to prevent cross infection, the international health organization emphasizes safe injection, the existing safe injectors are various, but some mechanisms are added on the basis of the common injectors to protect the injection needles after injection or prevent the injection needles from leaving. The real needleless injector does not need an injection needle, and only the automatic insulin injector is used as the injection needle at present, but the cost is high, and the injector can not be used by common people.

Disclosure of Invention

The invention aims to provide a simple injector without an injection needle, which has the advantages of reliable principle, simple structure, convenient use, suitability for intramuscular injection, applicability to insulin injectors and vaccine injectors and real safety injector.

In order to achieve the purpose, the technical scheme of the invention is as follows: a syringe without injection needle, the syringe mainly includes two parts, a part is the syringe part, a part is the pressure-providing part; the injector part consists of an outer sleeve, a core bar, a rubber plug and a specially arranged injection head and a liquid pumping head which are the same as those of a common injector; the connection of the injection head and the injector outer sleeve is the same as the connection method of a common injector with screw threads and an injection needle, adopts double-thread connection, and is provided with 6: 100 conical heads; the connection method of the liquid pumping head and the injector outer sleeve is the same as that of the injection head; the injection head consists of a needle head seat, an omega-shaped stainless steel piece, a silica gel sealing ring, a sheath 1 and a sealing rubber gasket which are the same as those of a common injection needle seat; 1-10 micropores with the diameter of 1-10 mu are arranged at the top end of the omega-shaped stainless steel part; the liquid pumping head is designed into a plastic injection needle and is specially used for pumping liquid medicine; the pressure providing part consists of a shell, a pressure shaft and a spring. The upper end of the shell is provided with two symmetrical side notches, a guide groove for the pressure shaft to move up and down is arranged in the shell, the top end of the shell is provided with a hook extending inwards, and the topmost end of the shell is provided with a pressing handle for triggering the hook; the pressure shaft consists of a disc and a vertical shaft hook, the edge of the disc is provided with two convex points corresponding to the guide grooves, the pressure shaft is connected with the spring, and a one-way hook is arranged above the pressure shaft; the spring is a pressure spring with the elasticity more than or equal to 1Kg, and the spring is pressed into the shell along the guide groove and is hung with the hook in the top end of the shell after being arranged on the disc of the pressure shaft to form a complete pressure providing part; when the liquid medicine is pumped by the liquid pumping head in the injector part, air is exhausted, the injection head is replaced, the core bar handle at the tail part of the injector is arranged in the pressure providing part, the wing piece of the outer sleeve of the injector is screwed into the side notch of the pressure providing part to fixedly connect the injector part and the pressure providing part, the injection head is aligned to and pressed on the muscle injection part, the pressing handle at the top end of the pressure providing part is pressed down, the spring is triggered, and the liquid medicine in the injector is injected into muscles in a high-pressure state, so that the injection is completed.

The invention discloses a simple syringe without an injection needle, which has reliable and advanced principle and is a real safe syringe. If the power supply part is configured into a pneumatic pressure device (an existing device is selected), the power supply part can be suitable for being used as a muscle syringe and a vaccine syringe used by an epidemic prevention department in hospitals, and if the power supply part is manufactured into a pre-filled syringe, the power supply part is more convenient to use.

Drawings

FIG. 1: the invention is a structural schematic diagram, is a drawing of a specification and is also a drawing of an abstract of the invention.

FIG. 2: an enlarged view of the injection head.

In the figure: 1. an injector portion; 2. a pressure providing portion; 3. an injection head; 4. a jacket; 5. a core bar; 6. a rubber plug; 7. a guide groove; 8. a disc; 9. a hook 1; 10. a hook 2; 11. a spring; 12. pressing the handle; 13. an omega-shaped stainless steel part; 14. a silica gel sealing ring; 15. micropores; 16. a sheath 1; 17. sealing the rubber gasket; 18. a plastic injection needle; 19. a sheath 2; 20. a side notch; 21. double-thread; 22. a liquid pumping head; 23. a housing; 24. a pressure shaft; 25. a handle; 26. a fin.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

The invention is a simple injector without injection needle, is suitable for intramuscular injection, can be applied to insulin injectors and vaccine injectors, and is a safe injector in the true sense.

As shown in fig. 1, the syringe mainly comprises two parts, one part is a syringe part (1) and the other part is a pressure providing part (2); the injector part (1) is composed of an outer sleeve (4), a core bar (5), a rubber plug (6) which are the same as those of a common injector, and an injection head (3) and a liquid pumping head (22) which are specially arranged; the injection head (3) is connected with the injector jacket (4) by adopting double-thread (21), the direct screwing joint is pressed tightly, the injection head (3) is composed of a needle head seat which is the same as a common injection needle seat, but no needle tube, an omega-shaped stainless steel piece (13), a silica gel sealing ring (14), a sheath (1), (16) and a sealing rubber gasket (17) are additionally arranged; 1-10 micropores (15) with the diameter of 1-10 mu m are arranged at the top end of the omega-shaped stainless steel part (13); the liquid-pumping head (22) is designed into a plastic injection needle (18) and is specially used for pumping liquid medicine; the pressure providing part (2) consists of a shell (23), a pressure shaft (24) and a spring (11), the shell (23) is provided with two symmetrical side notches (20), a guide groove (7) for the pressure shaft (24) to move up and down is arranged in the shell, the top end in the shell (23) is provided with a hook (2) (10) extending inwards, and the topmost end is provided with a pressing handle (12) for triggering the hook (2) (10); the pressure shaft (24) consists of a disc (8) and vertical shaft hooks 1 and 9, two salient points corresponding to the guide groove (7) are arranged on the edge of the disc (8), the pressure shaft (24) is connected with a spring (11), the pressure shaft (24) is provided with the vertical shaft hooks 1 and 9, and the spring (11) is a pressure spring with the pressure being more than or equal to 1 Kg; after the spring (11) is arranged on a disc (8) of the pressure shaft (24), the spring is pressed into the shell (23) along the guide groove (7) and is hung with a hook 2(10) at the top end of the shell (23) to form a complete pressure providing part (2); when the injector part (1) uses the liquid pumping head (22) to pump liquid medicine, air is exhausted, the injection head (3) is replaced, the tail handle (25) of the injector core rod (5) is arranged in the pressure providing part (2), then the wing (26) of the injector outer sleeve (4) is screwed into the side notch (20) of the pressure providing part (2), the injector part (1) and the pressure providing part (2) are fixedly connected, the protective sleeve (1) (16) is opened, the injection head (3) is aligned and pressed at the intramuscular injection part, the pressing handle (12) at the top end of the pressure providing part (2) is pressed, the spring (11) is triggered, and the liquid medicine in the injector is injected into muscles in a high-pressure state to complete injection.

In specific implementation, the omega-shaped stainless steel part (13) is formed by stamping, the micropores (15) of the omega-shaped stainless steel part (13) are perforated by laser, the injection head (3) can be assembled by an automatic production line, and the pressure providing part (2) can also be assembled by the automatic production line; if the pneumatic pressure device is used in a large amount in hospitals and epidemic prevention departments, the pneumatic pressure device can be used for the power supply part (the existing pressure device is used for selection); if the liquid medicine or the vaccine is filled in the syringe in advance (the syringe is pre-filled), the use is more convenient.

The invention is a simple needleless injector, the principle is reliable, the process is feasible, the cost is lower, the injector is a safe injector which can be used by common people in the true sense, the infection risks of medical care personnel and cleaning personnel can be completely avoided, and the injector is more advanced compared with a common injector and a common safe injector, and is worth popularizing vigorously.

Claims

1. A simple needleless injector mainly comprises an injector part (1) and a pressure supply part (2); the method is characterized in that: the injector part (1) consists of an outer sleeve (4), a core rod (5), a rubber plug (6), an injection head (3) and a liquid extraction head (22) which are the same as those of a common injector, and the connection method of the liquid extraction head (22) and the outer sleeve (4) is the same as that of the injection head (3) and the outer sleeve (4); the injection head (3) consists of a needle head seat, an omega-shaped stainless steel piece (13), a silica gel sealing ring (14), a sheath (1), (16) and a sealing rubber gasket (17); the pressure providing part (2) consists of a shell (23), a pressure shaft (24) and a spring (11), the shell (23) is provided with two symmetrical side notches (20), a guide groove (7) for the pressure shaft (24) to move up and down is arranged in the shell (23), a hook (2) (10) extending inwards is arranged at the top end of the shell (23), a pressing handle (12) for triggering the hook (2) (10) is arranged at the topmost end, the pressure shaft (24) consists of a disc (8) and a vertical shaft hook (1) (9), two salient points corresponding to the guide groove (7) are arranged at the edge of the disc (8), the spring (11) is arranged on the disc (8) and is pressed into the shell (23) along the guide groove (7), when the hook (2) (10) is hung by the vertical shaft hook (1) (9) with adaptive shape, the spring (11) is kept in a pressed state, and when the pressing handle (12) is pressed, the vertical shaft hook (1) (9) is separated from the hook (2) (10), the spring (11) is triggered.

2. A simple needleless injector as in claim 1 wherein: the top end of the omega-shaped stainless steel piece (13) is provided with 1-10 micropores (15) with the diameter of 1-10 mu m.

3. A simple needleless injector as in claim 1 wherein: the liquid pumping head (22) is arranged as a plastic injection needle and consists of a plastic injection needle (18) and a sheath (2), (19).

4. A simple needleless injector as in claim 1 wherein: the spring (11) is a compression spring with the pressure not less than 1 kg.