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CN-224207225-U - Check valve and liquid injection mechanism

CN224207225UCN 224207225 UCN224207225 UCN 224207225UCN-224207225-U

Abstract

The utility model relates to the technical field of needleless injectors, in particular to a one-way valve and a liquid injection mechanism, which comprises a mounting assembly, wherein the mounting assembly comprises a valve body and a liquid passing channel arranged in the valve body; the sealing assembly comprises an elastic piece arranged in the liquid passing channel, an extrusion piece arranged at the end part of the elastic piece and a rubber piece arranged between the extrusion piece and the inner wall of the valve body, wherein the liquid passing channel comprises a liquid inlet end and a liquid outlet end, and soft contact is carried out between the end part of the extrusion piece and the liquid inlet end through the rubber piece. This check valve and annotate liquid mechanism pours into the liquid medicine into the liquid reserve pipe through the feed liquor pipe, then extrudees the liquid medicine through the piston rod from the passing liquid of valve body through passing, accomplishes the blowout injection, the inside rubber spare of valve body realize the tip of extrusion piece with soft seal between the feed liquor end improves holistic sealed effect.

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
20260508
Application Date
20250312

Claims (10)

  1. 1. A one-way valve is characterized by comprising, A mounting assembly (100), wherein the mounting assembly (100) comprises a valve body (101), a liquid passing channel (102) arranged inside the valve body (101), and The sealing assembly (200) comprises an elastic piece (201) arranged in the liquid passing channel (102), an extrusion piece (202) arranged at the end part of the elastic piece (201) and a rubber piece (203) arranged between the extrusion piece (202) and the inner wall of the valve body (101); The liquid passing channel (102) comprises a liquid inlet end (102 a) and a liquid outlet end (102 b); Soft contact is performed between the end part of the extrusion piece (202) and the liquid inlet end (102 a) through the rubber piece (203).
  2. 2. The one-way valve according to claim 1, wherein the pressing member (202) includes a receiving chamber (M) and a pressing surface (N), and the rubber member (203) is disposed between the pressing surface (N) and the liquid inlet end (102 a); The elastic piece (201) is positioned inside the accommodating cavity (M); The outer wall of the accommodating cavity (M) is matched with the liquid outlet end (102 b); the liquid passage (102) passes through the inside of the accommodating cavity (M).
  3. 3. The one-way valve according to claim 1 or 2, wherein the pressing member (202) comprises a mounting cylinder (202 a), a containing cavity (M) is formed inside the mounting cylinder (202 a), and the surface of the mounting cylinder (202 a) is a pressing surface (N); The rubber piece (203) is embedded in the liquid inlet end (102 a) and matched with the extrusion surface (N); or the rubber piece (203) is fixedly arranged on the extrusion surface (N) and matched with the liquid inlet end (102 a); The mounting cylinder (202 a) is provided with a plurality of perforations (202 a-1); the perforations (202 a-1) allow the passage of the overfluid (102).
  4. 4. The one-way valve according to claim 1 or 2, wherein the pressing member (202) comprises a mounting cylinder (202 a), a containing cavity (M) is formed inside the mounting cylinder (202 a), and the surface of the mounting cylinder (202 a) is a pressing surface (N); The rubber piece (203) is embedded in the liquid inlet end (102 a) and matched with the extrusion surface (N); or the rubber piece (203) is fixedly arranged on the extrusion surface (N) and matched with the liquid inlet end (102 a); and a gap is formed on the contact surface of the liquid outlet end (102 b) and the mounting cylinder (202 a) for the passing of the liquid passing channel (102).
  5. 5. The one-way valve of claim 2, wherein the extrusion (202) comprises a mounting plate (202 b) and a support post (202 c) disposed on a surface of the mounting plate (202 b); At least one support column (202 c) is arranged, and a space between the support column (202 c) and the mounting plate (202 b) is a containing cavity (M); the other side of the mounting plate (202 b) is the extrusion surface (N).
  6. 6. The one-way valve according to claim 2 or 5, characterized in that a mounting disc (202 d) is provided on the surface of the pressing surface (N), the mounting disc (202 d) covering the liquid passage (102) of the liquid inlet end (102 a); The rubber piece (203) is sleeved on the outer side of the mounting plate (202 d) and matched with the liquid inlet end (102 a).
  7. 7. A one-way valve according to any one of claims 1-2 or 5, characterized in that the valve body (101) comprises a first valve seat (101 a) and a second valve seat (101 b) that are screwed together; The liquid inlet end (102 a) is positioned on the first valve seat (101 a); The liquid outlet end (102 b) is positioned on the second valve seat (101 b).
  8. 8. A one-way valve according to claim 7, wherein the liquid outlet end (102 b) has an inner diameter of 0.15mm-0.3mm.
  9. 9. The liquid injection mechanism is characterized by comprising the one-way valve as set forth in claim 8, and further comprising; A liquid storage assembly (300), wherein the liquid storage assembly (300) comprises a liquid storage pipe (301) communicated with the liquid inlet end (102 a), a piston rod (302) arranged in the liquid storage pipe (301) in a sliding way, and The liquid inlet assembly (400), the liquid inlet assembly (400) comprises a liquid inlet pipe (401) connected with the liquid storage pipe (301), and a control valve (402) arranged in the liquid inlet pipe (401).
  10. 10. The liquid injection mechanism according to claim 9, wherein the liquid storage tube (301) comprises a liquid storage cavity (301 a) and a connecting cavity (301 b); one end of the connecting cavity (301 b) is connected with the liquid inlet pipe (401), and the other end of the connecting cavity is connected with the liquid storage cavity (301 a); the piston rod (302) is slidably inserted into the liquid storage cavity (301 a).

Description

Check valve and liquid injection mechanism Technical Field The utility model relates to the technical field of needleless injectors, in particular to a one-way valve and a liquid injection mechanism. 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 and a spray head, the medicine storage tube pushes out internal medicine liquid through the movement of a piston, the pressure is increased when the medicine storage tube passes through the spray head, so that injection is completed by completing puncture epidermis, a check valve inside the spray head is sealed by adopting a metal surface in a hard contact manner, the processing difficulty is high, and the sealing effect is not ideal. Disclosure of utility model The present utility model has been made in view of the above-described problems with the conventional check valve and liquid injection mechanism. It is therefore one of the objects of the present utility model to provide a one-way valve that improves the sealing effect of the one-way valve inside the spray head. In order to solve the technical problems, the utility model provides a one-way valve which comprises, The installation component comprises a valve body, a liquid passing channel arranged in the valve body, and The sealing assembly comprises an elastic piece arranged in the liquid passing channel, an extrusion piece arranged at the end part of the elastic piece and a rubber piece arranged between the extrusion piece and the inner wall of the valve body; The liquid passing channel comprises a liquid inlet end and a liquid outlet end; And soft contact is performed between the end part of the extrusion part and the liquid inlet end through the rubber piece. As a preferable scheme of the one-way valve, the extrusion piece comprises a containing cavity and an extrusion surface, and the rubber piece is arranged between the extrusion surface and the liquid inlet end; The elastic piece is positioned in the accommodating cavity; the outer wall of the accommodating cavity is matched with the liquid outlet end; The liquid passing channel passes through the inside of the accommodating cavity. As a preferable scheme of the one-way valve, the extrusion piece comprises a mounting barrel, wherein a containing cavity is formed in the mounting barrel, and the surface of the mounting barrel is an extrusion surface; The rubber piece is embedded in the liquid inlet end and matched with the extrusion surface; or the rubber part is fixedly arranged on the extrusion surface and matched with the liquid inlet end; The mounting cylinder is provided with a plurality of perforations; The through holes are used for the passing liquid channels to pass through. As a preferable scheme of the one-way valve, the extrusion piece comprises a mounting barrel, wherein a containing cavity is formed in the mounting barrel, and the surface of the mounting barrel is an extrusion surface; The rubber piece is embedded in the liquid inlet end and matched with the extrusion surface; or the rubber part is fixedly arranged on the extrusion surface and matched with the liquid inlet end; and a gap is formed on the contact surface of the liquid outlet end and the mounting cylinder for the passing of the liquid passage. As a preferable scheme of the one-way valve, the extrusion piece comprises a mounting plate and a support column arranged on the surface of the mounting plate; The support column is provided with at least one support column, and a space between the support column and the mounting plate is a containing cavity; the other surface of the mounting plate is the extrusion surface. As a preferable scheme of the one-way valve, the bottom of the mounting cylinder is provided with a mounting disc, and the mounting disc covers the liquid passing channel of the liquid inlet end; the rubber part is sleeved on the outer side of the mounting plate and matched with the liquid inlet end. As a preferable scheme of the one-way valve, the valve body comprises a first valve seat and a second valve seat which are connected through threads; The liquid inlet end is positioned on the first valve seat; the liquid outlet end is positioned on the second valve seat. As a preferable scheme of the one-way valve, the inner diameter of the liquid outlet end is 0.15mm-0.3mm. The one-way valve has the beneficial effects that the elastic piece controls the extrusion piece to extrude the rubber piece to be in contact with the liquid inlet end, so that the liquid passing channel is clos