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CN-224220517-U - Liquid pushing mechanism and injector

CN224220517UCN 224220517 UCN224220517 UCN 224220517UCN-224220517-U

Abstract

The utility model relates to the technical field of needleless injectors, in particular to a liquid pushing mechanism and an injector, comprising a liquid storage component, wherein the liquid storage component comprises a liquid storage pipe and a liquid outlet hole arranged at the end part of the liquid storage pipe, and the pushing component comprises a piston rod which is arranged in the liquid storage pipe in a sliding way and a push rod which can relatively displace with the piston rod, and the push rod can drive the piston rod to synchronously move when the relative displacement reaches the end of a stroke. According to the liquid pushing mechanism and the injector, through the action that one relative displacement exists between the piston rod and the push rod, the moving speed of the push rod can be increased when the push rod and the piston rod are in relative displacement, the piston rod can be impacted when the push rod is in contact with the piston rod, the piston rod is impacted, so that the pressure of liquid medicine is increased, the liquid medicine is convenient to puncture the epidermis, and the piston rod moves along with the push rod in the later stage, so that the liquid medicine is convenient to be slowly entered into a human body.

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 liquid pushing mechanism is characterized by comprising, A liquid storage assembly (100), wherein the liquid storage assembly (100) comprises a liquid storage pipe (101), a liquid outlet hole (102) arranged at the end part of the liquid storage pipe (101), and -A pushing assembly (200), the pushing assembly (200) comprising a piston rod (201) slidably arranged in the reservoir (101), and a push rod (202) capable of relative displacement with the piston rod (201); The push rod (202) can drive the piston rod (201) to synchronously move when the relative displacement reaches the end of the stroke.
  2. 2. The liquid pushing mechanism according to claim 1, wherein one end of the piston rod (201) is sealed with the inside of the liquid storage tube (101), and a first limit groove (201 a) is formed at the other end of the piston rod (201); The end part of the push rod (202) is provided with a first control convex body (202 a); The first control convex body (202 a) is inserted into the first limit groove (201 a).
  3. 3. The liquid pushing mechanism according to claim 1 or 2, wherein a second control convex body (201 b) is arranged at one end of the piston rod (201); a second limit groove (202 b) is arranged at the end part of the push rod (202), The second control convex body (201 b) is inserted into the second limit groove (202 b).
  4. 4. A liquid pushing mechanism according to claim 1 or 2, wherein the push rod (202) and the piston rod (201) are connected through a limiting piece (203), and the limiting piece (203) controls the push rod (202) and the piston rod (201) to slide relatively.
  5. 5. The liquid pushing mechanism according to claim 4, wherein the limiting member (203) comprises a connecting rope (203 a) provided between the piston rod (201) and the push rod (202); The push rod (202) is in sliding connection with the piston rod (201), or the push rod (202) and the piston rod (201) are simultaneously in sliding connection with the liquid storage tube (101).
  6. 6. The liquid pushing mechanism according to claim 4, wherein the limiting member (203) comprises a telescopic rod (203 b) disposed between the piston rod (201) and the push rod (202); The push rod (202) is in sliding connection with the piston rod (201), or the push rod (202) and the piston rod (201) are simultaneously in sliding connection with the liquid storage tube (101).
  7. 7. The liquid pushing mechanism as set forth in any one of claims 1, 2, 5 or 6, wherein the displacement distance (a) of the relative displacement of the piston rod (201) and the push rod (202) is 1cm to 8cm.
  8. 8. An injector, characterized by comprising the liquid pushing mechanism as set forth in claim 7, and further comprising; A liquid inlet assembly (300), wherein the liquid inlet assembly (300) comprises a liquid inlet pipe (301) connected with the liquid storage pipe (101), a first one-way valve (302) arranged in the liquid inlet pipe (301), and A liquid outlet assembly (400), wherein the liquid outlet assembly (400) comprises a spray head (401) arranged at the end part of the liquid storage pipe (101), and a second one-way valve (402) arranged in the spray head (401); the spray head (401) is communicated with the liquid outlet hole (102).
  9. 9. The syringe of claim 8, wherein the reservoir (101) comprises a sliding chamber (101 a) and a fluid inlet chamber (101 b); The piston rod (201) is slidably arranged in the sliding cavity (101 a), and the liquid outlet hole (102) is positioned at the end part of the sliding cavity (101 a) and communicated with the spray head (401); One end of the liquid inlet cavity (101 b) is connected with the sliding cavity (101 a), and the other end of the liquid inlet cavity is connected with the liquid inlet pipe (301).
  10. 10. The syringe according to claim 8 or 9, characterized in that a holding shell (103) is arranged outside the liquid storage tube (101), and a driving component (500) is arranged between the push rod (202) and the holding shell (103).

Description

Liquid pushing mechanism and injector Technical Field The utility model relates to the technical field of needleless injectors, in particular to a liquid pushing 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 the internal medicine liquid through the movement of a piston to finish injection, the current movement of the piston is movement, the pressure of the medicine liquid sprayed out of the medicine storage tube is constant, and the injection is not beneficial to the injection after penetrating through the epidermis of a human body. Disclosure of utility model The present utility model has been made in view of the above-described problems with a conventional liquid pushing mechanism and syringe. It is therefore an object of the present utility model to provide a liquid pushing mechanism which aims to change the state of movement of the piston. In order to solve the technical problems, the utility model provides a liquid pushing mechanism which comprises, The liquid storage assembly comprises a liquid storage pipe, a liquid outlet hole arranged at the end part of the liquid storage pipe, and The pushing assembly comprises a piston rod which is arranged in the liquid storage pipe in a sliding manner and a push rod which can relatively displace with the piston rod; And the push rod can drive the piston rod to synchronously move when the relative displacement reaches the end of the stroke. As a preferable scheme of the liquid pushing mechanism, one end of the piston rod is hermetically arranged in the liquid storage tube, and the other end of the piston rod is provided with a first limit groove; The end part of the push rod is provided with a first control convex body; the first control convex body is inserted into the first limit groove. As a preferable scheme of the liquid pushing mechanism, one end of the piston rod is provided with a second control convex body; The end part of the push rod is provided with a second limit groove, The second control convex body is inserted into the second limit groove. As an optimal scheme of the liquid pushing mechanism, the push rod is connected with the piston rod through the limiting piece, and the limiting piece controls the push rod and the piston rod to slide relatively. As a preferable scheme of the liquid pushing mechanism, the limiting piece comprises a connecting rope arranged between the piston rod and the push rod; The push rod is in sliding connection with the piston rod, or the push rod and the piston rod are simultaneously in sliding connection with the liquid storage pipe. As a preferable scheme of the liquid pushing mechanism, the limiting piece comprises a telescopic rod arranged between the piston rod and the push rod; The push rod is in sliding connection with the piston rod, or the push rod and the piston rod are simultaneously in sliding connection with the liquid storage pipe. As a preferable scheme of the liquid pushing mechanism, the moving distance range a of the relative displacement of the piston rod and the push rod is 1cm-8cm. The liquid pushing mechanism has the beneficial effects that through the action that one relative displacement exists between the piston rod and the push rod, the moving speed of the push rod can be increased when the push rod is equivalent to the relative displacement of the piston rod, the piston rod can be impacted when the push rod is contacted with the piston rod, the instant moving speed of the piston rod is increased, and then the piston rod moves along with the push rod. It is a further object of the present utility model to provide a syringe that is designed to change the state of movement of the plunger. In order to solve the technical problems, the utility model provides the following technical scheme that the injector comprises a liquid pushing mechanism and also comprises a liquid pushing mechanism; the liquid inlet assembly comprises a liquid inlet pipe connected with the liquid storage pipe, a first one-way valve arranged in the liquid inlet pipe, and The liquid outlet assembly comprises a spray head arranged at the end part of the liquid storage pipe and a second one-way valve arranged in the spray head; the spray head is communicated with the liquid outlet. As a preferable scheme of the injector, the liquid storage tube comprises a sliding cavity and a liquid inlet cavity; The piston rod is arranged in the sliding cavity in a sliding way, and the liquid