Safe self-destroying syringe with changeable needle
A self-destructing syringe technology, applied in the field of medical devices, can solve the problems of poor sealing of double-needle seat syringes, poor working stability of double-seat syringes, high mold cost of double-needle seat syringes, etc., to achieve outstanding substantive features , The overall structure of the product is reasonable, highlighting the effect of significant progress
Inactive Publication Date: 2013-01-23
王祖扬
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Problems solved by technology
[0003] The existing single-seat withdrawable safety self-destruct syringes or safety syringes all have the same problem, that is, the balance point between the pulling force required for withdrawal and the engaging force of the inner needle seat. In order to overcome the above balance force problem, Injectors with double-seat structures have appeared, but there are still many problems in this type of syringes that cannot be overcome, for example, the tightness of the double-seat syringes is not good, the working stability of the double-seat syringes is not good, and the mold cost of the double-seat syringes is relatively high. high
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[0023] The present invention will be further described below with reference to the accompanying drawings.
[0024] The present invention is a safety self-destruction syringe with replaceable needles, which mainly includes a cylinder body 22, an inner needle holder body 3 is arranged inside the cylinder neck 2 at the end of the cylinder body 22, and an inner needle holder body 1 is provided with a Pull back the locking chamber 8, the cylinder body 22 is provided with a core rod 4, and a rubber plug 5 is sleeved near the end of the core rod 4, which is different from the prior art in that: the end of the inner needle holder body 3 is provided with a removable The upper end of the replaceable needle holder 6 is provided with a needle tube 7, the upper part of the inner needle holder body 1 forms a replaceable needle assembly part 9, and the lower part of the needle holder body 1 forms an elastic sealing limit part 10, which can be replaced. The needle assembly part 9 and the elas...
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The invention discloses a safe self-destroying syringe with a changeable needle, which differs from the prior art as follows: a changeable needle bed is arranged at the end of an inner needle bed body, a needle pipe is arranged at the upper end of the changeable needle bed, and a changeable assembling part is formed on the upper part of an inner needle bed body; an elastic sealing limit part is formed at the lower part of the needle bed body, an integral single structure is formed by the changeable needle assembling part and the elastic sealing limit part, a pullback locking member is arranged at the end of a core bar, and the changeable needle bed and an inner needle bed are matched in a screwing way; and an elastic buffer area of the inner needle bed can guarantee meshing force and tightness between the inner needle bed and a cylinder neck and reduce the required tensile force when the inner needle bed is pulled back, so that two contradictory key factors of the safe self-destroying syringe reach a best balance point; and the inner needle bed can be moulded in a one-step injection mode, and the syringe is stable in working state and has good practicability.
Description
technical field [0001] The invention relates to the technical field of medical devices, in particular to a safety self-destruction syringe with replaceable needles, and in particular to its mechanical connection structure. Background technique [0002] Comparative document, patent number: 201010204868.5, application date: 2010.06.21, announcement number: CN101862490A, patentee: Wenling Qianxiguang Medical Instrument Co., Ltd., this case discloses "a self-destructable insulin syringe with replaceable needles", including Syringe, push rod, rubber plug, needle seat, the front end of the push rod is connected with a cone through the card core, the needle seat and the front end of the syringe barrel are detachably connected, the needle seat is equipped with a needle seat for installing the needle, the needle seat and the needle There is a water-sealing O-shaped elastic sealing ring between the seats, which is characterized in that: the needle cylinder is provided with a connectin...
Claims
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IPC IPC(8): A61M5/178A61M5/50A61M5/31
Inventor 王祖扬
Owner 王祖扬