Safe needle cylinder

Abstract

The invention discloses a safe needle cylinder comprising an outer cylinder, a needle stand, an outer cylinder rubber plug, an inner cylinder, an inner cylinder rubber plug, a needle clamper and a vacuum generation device, wherein the outer cylinder comprises an outer cylinder front end and an outer cylinder rear end; the needle stand is arranged in the outer cylinder front end; the outer cylinder rubber plug is arranged in the outer cylinder and is combined with the needle stand so as to fix the needle stand; the inner cylinder comprises an inner cylinder front end and an inner cylinder rear end and penetrates in the outer cylinder from the outer cylinder rear end; the inner cylinder rubber plug is arranged at the inner cylinder front end; the needle clamper is embedded with the inner cylinder rubber plug and can be combined with a rear end opening of the needle stand; the vacuum generation device is arranged in the inner cylinder; and the needle stand can sucked into the inner cylinder by dint of the low pressure generated by the vacuum generation device.

Description

technical field [0001] The invention relates to a safety syringe, in particular to a safety syringe with a vacuum generating device. Background technique [0002] figure 1 It is a structural schematic diagram of a conventional syringe 100. The conventional syringe 100 includes: an outer barrel 110 , a push rod 120 and a needle assembly 130 . The needle assembly 130 is fixed to the front end of the outer cylinder 110 by screwing. The push rod 120 has a rubber plug 121. The rubber plug 121 and the inner wall of the outer cylinder 110 maintain airtight. When the user applies pressure to the push rod 120 from the rear, that is The medicament can be extruded from the needle port of the needle assembly 130 . When the injection of the conventional syringe 100 is completed, the user must manually put the needle assembly 130 on the needle cover and recover it. Once the operation is careless, it may be accidentally stabbed by the needle assembly 130, which increases the possibilit...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects of the existing safety syringes and provide a safety syringe with a vacuum generating device. The technical problem to be solved is to make it generate enough low pressure through the vacuum generating device to avoid Insufficient suction so that the needle cannot be smoothly sucked into the safety syringe

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