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Syringes with retractable needles

A syringe and needle technology, applied in the field of syringes, can solve the problems of increasing the sealing problem of the retracting mechanism and the space consumption and the like

Inactive Publication Date: 2021-10-22
孙锦锦
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This arrangement has certain disadvantages, namely increased sealing problems and space consumption of the retraction mechanism

Method used

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  • Syringes with retractable needles
  • Syringes with retractable needles
  • Syringes with retractable needles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0046] figure 1A syringe according to the invention is shown prior to use. The syringe 1 comprises a barrel 2 , a plunger 3 , a needle 4 and a plunger cap 10 . The needle 4 is inserted and adhesively secured in a needle holder 6 which itself is inserted into the nozzle 19 of the barrel 1 . The proximal end of the needle holder 6 is located in the distal region of the barrel 2 and is thus available for coupling to a retraction mechanism.

[0047] The needle holder 6 is attached by means of the female part 7 of the luer lock to a nozzle 19 which acts as a male counterpart.

[0048] The piston 3 houses a spring sleeve 12 surrounded by a compression spring 13 . The spring sleeve 12 has a proximal flange 17 for supporting the spring sleeve 12 against a ring element 18 protruding from the inner wall of the piston 3 . The flange 17 is at the same time a proximal support for the spring 13 which is supported at its distal end by the proximal end of the spring tensioning element 14 ...

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PUM

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Abstract

The invention relates to a syringe with a retractable needle comprising a barrel (2) with a spout (19) integrated in a male luer adapter element (26); slidably arranged on said barrel ( 2) a piston (3) in and coupled to a sealing element (16) having a central channel (20); a needle assembly comprising a needle (4), a needle holder (6) and a female luer adapter element (7); a spring assembly arranged in said piston (3), said spring assembly comprising a spring sleeve (12), a spring (13) mounted on said spring sleeve (12) ), a spring tensioning element (14) positioned on said spring sleeve (12) and held in place by the piston wall, and a plunger (15) mounted within said spring sleeve; and a piston cap (10) the piston (3) is coupled to the sealing element (16) by means of the spring tensioning element (14); the spring sleeve (12) protrudes from the inner wall of the piston (3) and supports the A ring element (18) at the proximal end of the spring sleeve (12) is held in place within the piston (3), the spring sleeve extending into the channel (20) of the sealing element (16) to its Distal end; said spring sleeve (12) comprises at its distal end a circular protrusion (21) on the inner side designed to engage a circular protrusion at the proximal end of said needle holder (6). shaped recess (22); wherein said piston (3) includes a retaining ring (11) on its inner surface, said retaining ring being designed to be in contact with said spring sleeve ( 12) the outer flange (17) engages.

Description

technical field [0001] The invention relates to a syringe with a retractable needle, said syringe comprising a barrel with a spout integrated in a male luer adapter element; a piston slidably arranged in said barrel and coupled to a sealing element, said The sealing element has a central channel; [0002] a needle assembly comprising a needle, a needle holder and a female luer adapter element; [0003] a spring assembly disposed in the piston, the spring assembly comprising a spring sleeve, a spring mounted on the spring sleeve, a spring tension slidably seated on the spring sleeve and held in place by the piston wall tightening elements, and a plunger installed in said spring sleeve; [0004] and piston caps; [0005] said piston is coupled to said sealing element by means of said spring tensioning element; [0006] The spring sleeve is held in place within the piston by a ring element protruding from the inner wall of the piston and supporting the proximal end of the spr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M5/32
CPCA61M5/322A61M2005/3223A61M2005/3224A61M2005/323A61M2005/3231A61M2005/3241A61M5/3234A61M5/3232A61M2005/31508A61M2005/3104A61M5/502A61M5/347A61M2005/3206A61M2005/3239A61M5/3221
Inventor 屠可望
Owner 孙锦锦