CN104524671A

CN104524671A - Needleless injector compressed through motor

Info

Publication number: CN104524671A
Application number: CN201410705136.2A
Authority: CN
Inventors: 陈凯; 王佳斌; 许孝华; 张国杰
Original assignee: Hangzhou Dianzi University
Current assignee: Hangzhou Dianzi University
Priority date: 2014-11-27
Filing date: 2014-11-27
Publication date: 2015-04-22

Abstract

The invention discloses a needleless injector compressed through a motor. The needleless injector comprises a motor compression device, a needleless injector body and a medicine taking port; the motor compression device comprises a stepping motor, a ball screw, a screw nut and a sliding platform; the needleless injector body comprises a lower half outer shell part, a main spring, a main rod, a resetting spring, an upper half outer shell part, a piston rod and a piston sleeve; and the medicine taking port is formed in the top of the piston sleeve. By means of the needleless injector, manual spring screwing is not needed, and a weak patient can conveniently use the needleless injector; operation is simple; and the springs are screwed, and automatic control over the injected dose has been achieved already.

Description

The needleless injector that a kind of motor compresses

Technical field

The invention belongs to technical field of medical treatment mechanical, particularly relate to the needleless injector that a kind of motor compresses.

Background technology

Needleless injector be a kind of by pressure liquid infusion to the syringe in human body.Its concrete grammar: first, tightens the spring of needleless injector; Then, the syringe needle of needleless injector is put into injecting fluid, rotate needleless injector and complete suction medicine; Finally, needleless injector syringe needle is aimed at the position oneself will injected, press release-push and complete injection.

As can be seen here, the shortcoming of common needleless injector has:

(1) holddown spring is painstaking: the power that the spring of needleless injector is required when compressing is very large, and weak patient uses more difficult;

(2) complex operation: inject a required time long.

Summary of the invention

The object of the invention is the deficiency for existing conventional injection system, propose the needleless injector that a kind of motor compresses.

The needleless injector that motor compresses, comprises motor hold down gag, needleless injector and interface of getting it filled;

Described motor hold down gag comprises motor, ball-screw, feed screw nut, sliding platform; Motor shaft in motor is fixedly connected with ball-screw by shaft coupling, and ball-screw is connected by lead screw pair and feed screw nut, and feed screw nut and sliding platform are fixed;

Needleless injector comprises shell the latter half, main spring, mobile jib, back-moving spring, shell the first half, piston rod and piston bush; Described shell the latter half and shell the first half are all cylindrical structural, shell the latter half open-top, open bottom shell the first half; Shell the first half is connected with shell the latter half by moving sets; Shell the latter half is fixed on sliding platform;

Described piston bush and shell the first half are coaxially arranged, and described mobile jib is arranged in the enclosed space that shell the first half and shell the latter half form, and mobile jib is provided with spacing preiection, and piston rod is arranged on mobile jib top; One end of main spring is fixedly connected with spacing preiection, and the other end is fixedly connected with bottom shell the latter half; One end of back-moving spring is fixedly connected with spacing preiection, and the other end is fixedly connected with shell the first half top, and described shell the latter half is provided with retaining mechanism, is used for locking mobile jib, and the top of described piston bush arranges interface of getting it filled.

Beneficial effect of the present invention: without the need to artificial energizing spring, is convenient to weak patient and uses; Simple to operate; Energizing spring, injected dose has realized automatic control all.

Accompanying drawing explanation

Fig. 1 is general assembly schematic diagram;

Fig. 2 is motor hold down gag schematic diagram;

Fig. 3 is needleless injector schematic diagram;

Fig. 4 is that motor compresses main spring schematic diagram;

Fig. 5 is locking schematic diagram;

Fig. 6 is schematic diagram of getting it filled;

Fig. 7 is schematic diagram after needleless injector injection.

Detailed description of the invention

Below in conjunction with Figure of description, the invention will be further described:

As shown in Figure 1, the needleless injector that a kind of motor compresses, comprises motor hold down gag, needleless injector and interface of getting it filled;

As shown in Figure 2, described motor hold down gag comprises motor 1, ball-screw 2, feed screw nut 3, sliding platform 4; Motor shaft in motor 2 is fixedly connected with ball-screw 2 by shaft coupling, and ball-screw 2 is connected by lead screw pair and feed screw nut 3, and feed screw nut 3 is fixed with sliding platform 4;

As shown in Figure 3, needleless injector comprises shell the latter half 5, main spring 6, mobile jib 7, back-moving spring 8, shell the first half 9, piston rod 12 and piston bush 13; Described shell the latter half 5 and shell the first half 9 are all cylindrical structural, shell the latter half 5 open-top, open bottom shell the first half 9; Shell the first half 9 is connected with shell the latter half 5 by moving sets; Shell the latter half is fixed on sliding platform;

Described piston bush and shell the first half are coaxially arranged, and described mobile jib 7 is arranged in the enclosed space that shell the first half and shell the latter half form, and mobile jib 7 is provided with spacing preiection 14, and piston rod is arranged on mobile jib 7 top; One end of main spring 6 is fixedly connected with spacing preiection, and the other end is fixedly connected with bottom shell the latter half 5; One end of back-moving spring 8 is fixedly connected with spacing preiection, and the other end is fixedly connected with shell the first half 9 top, and described shell the latter half is provided with retaining mechanism, is used for locking mobile jib 7, and the top of described piston bush arranges interface 10 of getting it filled.

Referring to Fig. 4, Fig. 5, Fig. 6, Fig. 7, the step that this machine will carry out within a working cycle has:

1, motor 1 rotates forward, and makes sliding platform 4 increase, and waits and rises to shell the latter half 5 when pinning with mobile jib 7, motor 1 stall;

2. medicine bottle 11 is aimed at interface 10 of getting it filled, motor 1 reverses, when waiting drug injection dosage to reach the dosage set, and motor 1 stall;

3. take off medicine bottle 11 and interface of getting it filled, take out needleless injector, needleless injector is aimed at the position of needs of patients injection, press unlock button, medicinal liquid has just been expelled in human body.

Above-mentioned detailed description of the invention is used for explaining and the present invention is described, instead of limits the invention, and in the protection domain of the claims in the present invention, any amendment make the present invention and change, all fall into protection scope of the present invention.

Claims

1. a needleless injector for motor compression, comprises motor hold down gag, needleless injector and interface of getting it filled;

It is characterized in that: described motor hold down gag comprises motor, ball-screw, feed screw nut, sliding platform; Motor shaft in motor is fixedly connected with ball-screw by shaft coupling, and ball-screw is connected by lead screw pair and feed screw nut, and feed screw nut and sliding platform are fixed;