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Safety syringe

A safety syringe and syringe technology, which can be used in syringes, hypodermic devices, infusion sets, etc., can solve the problems of troublesome operation, high defect rate and small volume.

Inactive Publication Date: 2006-08-02
黄平德
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] 1. The engaging seat 2 and the O-ring 203 are two components, which must be produced by two sets of equipment and need to be reassembled, which will increase the cost of manufacturing and assembling
[0011] 2. The O-ring 203 is small in size, and it is not easy to assemble it manually. If it is assembled by a machine, the O-ring 203 itself is elastic, so it is easy to break out during assembly, resulting in a high defect rate. And once the O-ring 203 jumps off and is stuck on the operating machine, it must be shut down for maintenance
[0012] 3. When assembling, it is necessary to insert the push rod 4 into the accommodation chamber 101 of the syringe 1 and position the engaging seat 2 against the positioning, so that the engaging seat 2 and the needle set 3 can be screwed and connected smoothly, and the assembling operation is quite cumbersome and Production capacity cannot be increased
[0013] 4. Using the O-ring 203 to be set on the engaging seat 2 will make the overall components more numerous, and in order to make the tenon 403 pass over the flange 204 smoothly, a slot 404 must be opened in the center of the tenon 403, and the structure is also more complicated.

Method used

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  • Safety syringe
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Such as image 3 , Figure 4 , as shown in FIG. 5 , the present invention includes a syringe 10, an engaging seat unit 20 installed inside the syringe 10, a needle unit 30 embedded and fixed in the engaging seat unit 20, and a needle unit 30 that is movably inserted in the syringe. 10 inside the push rod 40.

[0046] The syringe 10 is in the shape of a hollow cylinder, which has a cylinder portion 11 surrounding the axis 1L and defining a chamber 111, and a bundled tube portion 12 that is fixed at one end of the tube portion 11 and is in a constricted shape. The chambers 111 communicate with each other and have a through-hole 121 with a smaller diameter, and the connection between the through-hole 121 and the chamber 111 forms the stop portion 13 and the ring groove 14 .

[0047] The engaging seat unit 20 is in the shape of a stepped hollow column, which is inserted into the interior of the injection cylinder 10 from the opening of the chamber 111 of the injection cyl...

Embodiment 2

[0065] Such as Figure 8 As shown, the present invention includes a syringe 10 , an engaging seat unit 20 ′ installed inside the syringe 10 , a needle body 30 fixed in the engaging seat unit 20 ′, and a needle body 30 movably inserted inside the syringe 10 . The putter 40.

[0066] The inner ring surface 241' of the inner casing 24' of the engaging seat unit 20' is provided with an inclined shoulder 245' between the first engaging portion 242' and the accommodating portion 244'. The first engaging The portion 242' is provided with a slanted hole 247' formed around the slanted axis 1L'. The oblique axis 1L' intersects the axis 1L at an acute angle of approximately 20°, and the oblique axis 1L' intersects the oblique shoulder 245' perpendicularly.

[0067] As shown in Figure 9, when the push rod 40 is connected to the engaging seat unit 20' by the tenon 43, due to the setting of the inclined hole 247', the tenon 43 will exert a unilateral outward extrusion effect on the inner ...

Embodiment 3

[0069] Such as Figure 10 As shown, the present invention includes a syringe 10, an engaging seat unit 20" installed inside the syringe 10, a needle body 30" fixed in the engaging seat unit 20", and a needle body 30" that is movably inserted in the syringe 10. Internal push rod 40.

[0070] The engaging seat unit 20" has a sleeve part 21", a sealing part 22" directly formed and fixed on the sleeve part 21", and a needle seat 25" integrally formed with the sleeve part 21".

[0071] The sleeve member 21 ″ has an outer casing 23 ″ made of hard plastic material and an inner casing 24 ″ fixed inside the outer casing 23 ″ and made of a plastically elastic material.

[0072] The outer casing 23" has a disk portion 231" that can be abutted against the abutting portion 13, a circular tube portion 232" protruding from one side of the disk portion 231" and having a smaller diameter, surrounding the axis 1L and corresponding to the disk portion 231 "The outer peripheral surface 233" and...

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PUM

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Abstract

The invention is a safe injector. It provides a mechanism with simplified structure, reduced assembling processes, easy assembly, and quick assembly for transmitting media into body safely. The product includes injection cylinder, clamping base unit, needle unit and pushing pole; the cylinder has a cylinder part which can define the containing room and beam pipe with apertures, the apertures are connected with the room and form the stop part; the clamping base unit has a cover cylinder element and a sealing part arranged on the cover cylinder element; the cover cylinder has an external cover and a internal cover with inner ring surface; the inner ring surface arranges the first clamping part and containing part; the needle unit has a needle base arranged in the cover cylinder of the clamping base unit and a needle body in the base; the pushing pole arranges a pole part, an end arranged on one side of the pole and piston arranged in the containing room and a rabbet.

Description

technical field [0001] The invention belongs to a device for injecting a medium into the body, in particular to a safety syringe. Background technique [0002] Figure 1, figure 2 As shown, a conventional safety syringe includes a syringe 1 , an engaging seat 2 installed inside the syringe 1 , a needle set 3 screwed and positioned with the engaging seat 2 , and a push rod 4 that can move in the syringe 1 . [0003] The syringe 1 has a housing chamber 101 inside, a front hole 102 communicating with the housing chamber 101 and having a converging shape, and a shoulder 103 between the housing chamber 101 and the front hole 102 . [0004] The engaging seat 2 has a disc seat 201 which can resist and be positioned on the shoulder 103 , a cylindrical part 202 protruding from one side of the disc seat 201 along the axis, and an O-ring 203 which can be sleeved on the cylindrical part 202 . A flange 204 protrudes toward the axis at one end of the inner ring surface of the cylindrica...

Claims

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Application Information

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IPC IPC(8): A61M5/315A61M5/31A61M5/178
Inventor 黄平德
Owner 黄平德