Self-adaptive screw-in type double-buckle microsyringe

Abstract

The invention relates to the field of syringes, and provides a self-adaptive screw-in type double-buckle microsyringe. The disposable self-destruction syringe aims to achieve multi-point, micro and precise quantitative injection of the same patient and can be prevented from being repeatedly used. According to the main scheme, an outer sleeve is fixedly arranged at the bottom end of the base, a nut seat mounting seat is fixedly arranged at the upper end of the base, a nut seat is rotationally connected to the nut seat mounting seat, a threaded core rod is arranged in the outer sleeve, and the threaded core rod penetrates through a central rectangular hole of the nut seat mounting seat to be in clearance fit with the central rectangular hole. A thread of the threaded core rod is matched with a threaded hole of a nut in the nut seat, the nut comprises two half nuts, the two half nuts are compressed with the threaded core rod through a spring, the half nuts are matched with the threaded core rod in a threaded mode, the nut seat is rotated to drive the nut and the threaded core rod to rotate, and the threaded core rod is driven through the thread. And the threaded core rod is enabled to move in the axial direction of the threaded core rod.

Description

technical field [0001] The invention relates to the field of syringes, and provides an self-adaptive screw-in double buckle micro-injector. Background technique [0002] Public syringes can transmit diseases, so they must be sterilized, but the disinfection equipment is expensive and takes a long time, so this method has basically been eliminated, and disposable syringes have emerged as the times require. [0003] Disposable syringes have been widely used all over the world for many years. At present, the most common disposable syringes used in medical institutions are composed of syringes, needles, pistons and core rods assembled in the syringes. [0004] However, the injection dose of an ordinary syringe is usually a one-time dose, that is, the liquid medicine is pumped once, and the one-time injection is completed. The scale printed on the cylinder is used for human judgment, and the syringe scale itself has errors, so there will be scale errors and human errors. Therefo...

AI Technical Summary

Problems solved by technology

[0008] 1. Some structural designs are too complicated, there are many accessories and high precision requirements, the assembly process is complicated, and the assembly precision requirements are high, so it is very difficult to achieve industrial mass production;

[0009] 2. Some structural designs seem simple, but they are only theoretically feasible. The accessories cannot be produced through conventional processes, and the accessories cannot be assembled, etc., and industrial mass production cannot be realized;

[0010] 3. Micro-injection can be realized by adopting the gear rotation structure, but the suction and exhaust are limited by the structure, which is time-consuming, laborious, low-efficiency, long-time-consuming, and not operable;

[0011] 4. The rotation angle of some rotating structures is too large, and there are no positions. It needs to be operated by looking at the scale. The operation is time-consuming and laborious. The dose control is completely based on human judgment, with a high probability of deviation and low accuracy;

[0012] 5. Some rotating structures adopt the method of dividing the nut into two halves. When using, the two halves of the nut are closed to cooperate with the screw. However, when the two halves of the nut are closed, there is no buffer. When the threads of the nut and the threads of the screw are not completely aligned , the nut and the screw cannot be effectively engaged, multiple alignments are required, the operation is very inconvenient, and the core rod is rotated, which cannot be effectively positioned during rotation, the dosage control is difficult and the accuracy is low;

[0013] 6. Some structures do not have a self-destruct function and cannot effectively prevent secondary use

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