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CN-224220516-U - Driving mechanism and injector

CN224220516UCN 224220516 UCN224220516 UCN 224220516UCN-224220516-U

Abstract

The utility model relates to the technical field of needleless injectors, in particular to a driving mechanism and an injector, comprising a mounting assembly and a driving assembly, wherein the mounting assembly comprises a mounting block, the driving assembly comprises a push rod which is arranged on the mounting block in a sliding manner, a reset piece with one end fixed and the other end arranged on the push rod, and a driving part connected with the push rod, the driving part controls the push rod to move away from an initial position, and the reset piece controls the push rod to return to the initial position. The driving mechanism and the injector can complete the drawing and discharging of the liquid medicine by the reciprocating movement of the push rod in the liquid storage tube, wherein the driving mechanism controls the push rod to draw the liquid medicine in a quantitative mode every time and then the elastic piece controls the push rod to return to the initial position during the period of pressurizing and discharging the liquid medicine to complete the needleless injection.

Inventors

  • YE SHU
  • ZHU FUCHUN
  • CHEN BANGLIN
  • YANG JING
  • SONG JIAN

Assignees

  • 江苏乐聚医药科技有限公司

Dates

Publication Date
20260512
Application Date
20250312

Claims (10)

  1. 1. A driving mechanism is characterized by comprising, A mounting assembly (100) comprising a mounting block (101), and The driving assembly (200) comprises a push rod (201) arranged on the mounting block (101) in a sliding manner, a reset piece (202) with one end fixed and the other end arranged on the push rod (201), and a driving part (203) connected with the push rod (201); the driving part (203) controls the push rod (201) to move away from the initial position, and the reset piece (202) controls the push rod (201) to return to the initial position.
  2. 2. The drive mechanism of claim 1, wherein: One end of the reset piece (202) is fixed on the mounting block (101), and the other end of the reset piece is mounted on the push rod (201).
  3. 3. The drive mechanism according to claim 1 or 2, wherein the drive section (203) includes a drive motor (203 a) fixedly provided, a drive plate (203 b) provided at an end of the drive motor (203 a), and a control member (203 c) provided on the drive plate (203 b); the end part of the push rod (201) is provided with a clamping block (201 a), and the clamping block (201 a) is in sliding connection with the control piece (203 c).
  4. 4. The driving mechanism as set forth in claim 3, wherein the control member (203 c) comprises an initial surface (203 c-1) provided on an end surface of the driving plate (203 b), and a climbing ring (203 c-2) connected end to end with the initial surface (203 c-1); The climbing ring (203 c-2) gradually rises from one end to the other end in height; the clamping block (201 a) is in sliding connection with the climbing ring (203 c-2).
  5. 5. The driving mechanism as set forth in claim 3, wherein the control member (203 c) comprises an initial surface (203 c-1) provided on a side surface of the driving plate (203 b), and a pressing block (203 c-3) connected to the initial surface (203 c-1); the clamping block (201 a) is in sliding connection with the extrusion block (203 c-3).
  6. 6. The driving mechanism as set forth in claim 3, wherein the control member (203 c) comprises a climbing groove (203 c-4) and a connecting groove (203 c-5) provided at a side of the driving plate (203 b); The climbing groove (203 c-4) is spiral, the connecting groove (203 c-5) is communicated with the two ends of the climbing groove (203 c-4), A limit column (201 b) is arranged on the push rod (201), The limit column (201 b) is slidably inserted into the climbing groove (203 c-4).
  7. 7. The driving mechanism according to claim 1 or 2, wherein the driving portion (203) comprises a driving motor (203 a) fixedly provided, and a gear-missing (203 d) provided at an end portion of the driving motor (203 a); the push rod (201) is provided with a convex tooth (201 c); the gear-missing wheel (203 d) is matched with the convex tooth (201 c).
  8. 8. A syringe comprising the drive mechanism according to claim 7, further comprising; The liquid storage assembly (300), the liquid storage assembly (300) comprises a liquid storage pipe (301), a liquid inlet pipe (302) arranged on the liquid storage pipe (301), and a spray head (303) arranged at the end part of the liquid storage pipe (301); The mounting assembly (100) further comprises a connecting piece (102), one end of the connecting piece (102) is connected with the liquid storage tube (301), and the other end of the connecting piece is connected with the mounting block (101); the end part of the push rod (201) is in sliding connection with the liquid storage tube (301).
  9. 9. The syringe of claim 8, wherein the liquid inlet pipe (302) and the nozzle (303) are internally provided with one-way valves (304).
  10. 10. The syringe according to claim 8 or 9, characterized in that the mounting assembly (100) comprises a grip shell (103); The reservoir assembly (300) and the drive assembly (200) are mounted inside the grip housing (103).

Description

Driving mechanism and injector Technical Field The utility model relates to the technical field of needleless injectors, in particular to a driving mechanism and an injector. Background The needleless injector mainly utilizes the principle of pressure jet flow, generates pressure through an internal pressure device, pushes the liquid medicine in the medicine tube to pass through micropores to form an extremely fine liquid medicine column, so that the liquid medicine instantaneously penetrates the epidermis of a human body to reach the subcutaneous part, and the liquid medicine is absorbed in a dispersion shape with the diameter of 3-5 cm under the skin. The needleless injector comprises a medicine storage tube, the medicine storage tube pushes out internal medicine liquid through the movement of a piston to complete injection, the reciprocating movement of the piston completes the extraction and the discharge of the medicine liquid in the medicine storage tube, and the extraction content of the medicine liquid is not influenced by the fixed extraction movement distance of the piston. Disclosure of utility model The present utility model has been made in view of the above-described problems with the conventional drive mechanism and syringe. It is therefore an object of the present utility model to provide a drive mechanism which aims to control the distance that the piston moves. In order to solve the technical problems, the utility model provides a driving mechanism which comprises, A mounting assembly including a mounting block, and The driving assembly comprises a push rod which is arranged on the mounting block in a sliding manner, a reset piece with one end fixed and the other end arranged on the push rod, and a driving part connected with the push rod; The driving part controls the push rod to move away from the initial position, and the reset piece controls the push rod to return to the initial position. As a preferable scheme of the driving mechanism, the reset piece can be made of a spring or a metal elastic sheet; one end of the reset piece is fixed on the mounting block, and the other end of the reset piece is mounted on the push rod. The driving part comprises a driving motor which is fixedly arranged, a driving disc which is arranged at the end part of the driving motor, and a control piece which is arranged on the driving disc; The end part of the push rod is provided with a clamping block which is in sliding connection with the control piece. As a preferable scheme of the driving mechanism, the control piece comprises an initial surface arranged on the end surface of the driving disk and a climbing ring connected with the initial surface end to end; the climbing ring gradually rises from one end to the other end; The clamping block is in sliding connection with the climbing ring. The control piece comprises an initial surface arranged on the side surface of the driving disc and a squeezing block connected with the initial surface; The clamping block is in sliding connection with the extrusion block. As a preferable scheme of the driving mechanism, the control piece comprises a climbing groove and a connecting groove which are arranged on the side surface of the driving disc; the climbing groove is spiral, the connecting groove is communicated with the two ends of the climbing groove, A limit column is arranged on the push rod, The limit post is inserted in the climbing groove in a sliding manner. The driving part comprises a driving motor which is fixedly arranged and a gear lack arranged at the end part of the driving motor; Convex teeth are arranged on the push rod; the gear lack is matched with the convex teeth. The driving mechanism has the beneficial effects that the elastic piece keeps the initial position of the push rod when the push rod is static, the driving part is used for controlling the moving distance of the push rod, after the driving part is separated from the push rod, the elastic piece drives the push rod to return to the initial position, and the driving part can ensure that the moving distance of the push rod is the same every time. It is another object of the present utility model to provide a syringe that is designed to control the amount of fluid drawn by the plunger. In order to solve the technical problems, the utility model provides the following technical scheme that the injector comprises a driving mechanism and also comprises a driving mechanism; The liquid storage assembly comprises a liquid storage pipe, a liquid inlet pipe arranged on the liquid storage pipe and a spray head arranged at the end part of the liquid storage pipe; The mounting assembly further comprises a connecting piece, one end of the connecting piece is connected with the liquid storage pipe, and the other end of the connecting piece is connected with the mounting block; the end part of the push rod is in sliding connection with the liquid storage pipe. As a preferable scheme of the injector, t