One-way valve and liquid injection mechanism

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 comprise an installation assembly, the installation assembly comprises a valve body and a liquid passing channel arranged in the valve body; and a sealing assembly; the sealing assembly comprises an elastic piece arranged in the liquid passing channel, an extrusion piece arranged at the end 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 the end part of the extrusion piece is in soft contact with the liquid inlet end through the rubber piece. According to the one-way valve and the liquid injection mechanism, liquid medicine is injected into the liquid storage pipe through the liquid inlet pipe, then the liquid medicine is extruded through the piston rod to penetrate through the liquid passing channel of the valve body, spraying injection is completed, soft sealing between the end of the extrusion piece and the liquid inlet end is achieved through the rubber piece in the valve body, and the overall sealing effect is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of needleless injectors, and in particular to a one-way valve and injection mechanism. Background Technology

[0002] Needle-free injectors mainly utilize the principle of pressure jet. The internal pressure device generates pressure, which pushes the liquid in the tube through micropores to form an extremely fine liquid column. This allows the liquid to penetrate the epidermis and reach the subcutaneous layer instantly. The liquid is then absorbed in a diffused manner with a diameter of 3-5 cm under the skin.

[0003] The needle-free injector consists of a drug reservoir and a nozzle. The drug reservoir pushes out the internal liquid through the movement of the piston. When the liquid passes through the nozzle, the pressure increases, thereby completing the injection by puncturing the epidermis. Currently, the one-way valve inside the nozzle uses a hard contact seal with a metal surface, which is difficult to manufacture and has an unsatisfactory sealing effect. Utility Model Content

[0004] In view of the problems existing in the above-mentioned one-way valves and liquid injection mechanisms, this utility model is proposed.

[0005] Therefore, one of the objectives of this utility model is to provide a one-way valve, the purpose of which is to improve the sealing effect of the one-way valve inside the nozzle.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a one-way valve, comprising,

[0007] The mounting assembly includes a valve body and a liquid passage disposed inside the valve body; and...

[0008] A sealing assembly; the sealing assembly includes an elastic element disposed inside the liquid passage, a compression member disposed at the end of the elastic element, and a rubber element disposed between the compression member and the inner wall of the valve body;

[0009] The liquid passage includes an inlet end and an outlet end;

[0010] The end of the extrusion member and the liquid inlet end make soft contact through the rubber member.

[0011] As a preferred embodiment of the one-way valve of this utility model, the extrusion member includes a receiving cavity and an extrusion surface, and the rubber member is disposed between the extrusion surface and the liquid inlet end;

[0012] The elastic element is located inside the accommodating cavity;

[0013] The outer wall of the accommodating cavity mates with the liquid outlet end;

[0014] The liquid passage passes through the interior of the accommodating cavity.

[0015] As a preferred embodiment of the one-way valve of this utility model, the extrusion member includes a mounting cylinder, the interior of the mounting cylinder is a receiving cavity, and the surface of the mounting cylinder is an extrusion surface;

[0016] The rubber component is embedded in the liquid inlet end and mates with the extrusion surface;

[0017] Alternatively, the rubber component may be fixedly mounted on the extrusion surface and cooperate with the liquid inlet end;

[0018] The mounting cylinder is provided with multiple through holes;

[0019] The perforation allows the liquid passage to pass through.

[0020] As a preferred embodiment of the one-way valve of this utility model, the extrusion member includes a mounting cylinder, the interior of the mounting cylinder is a receiving cavity, and the surface of the mounting cylinder is an extrusion surface;

[0021] The rubber component is embedded in the liquid inlet end and mates with the extrusion surface;

[0022] Alternatively, the rubber component may be fixedly mounted on the extrusion surface and cooperate with the liquid inlet end;

[0023] There is a gap between the surface of the liquid outlet end and the mounting cylinder that allows the liquid passage to pass through.

[0024] In a preferred embodiment of the one-way valve of this utility model, the extrusion member includes a mounting plate and a support column disposed on the surface of the mounting plate;

[0025] At least one support column is provided, and the space between the support column and the mounting plate is a receiving cavity;

[0026] The other side of the mounting plate is the extrusion surface.

[0027] In a preferred embodiment of the one-way valve of this utility model, the bottom of the mounting cylinder is provided with a mounting plate, and the mounting plate covers the liquid passage at the liquid inlet end;

[0028] The rubber component is sleeved on the outside of the mounting plate and mates with the liquid inlet end.

[0029] As a preferred embodiment of the one-way valve of this utility model, the valve body includes a first valve seat and a second valve seat connected by threads;

[0030] The liquid inlet is located on the first valve seat;

[0031] The liquid outlet is located on the second valve seat.

[0032] In a preferred embodiment of the one-way valve of this utility model, the inner diameter of the liquid outlet is 0.15mm-0.3mm.

[0033] The beneficial effects of this one-way valve are: the elastic element controls the extrusion element to squeeze the rubber element into contact with the liquid inlet end, thereby closing the liquid passage at the liquid inlet end; the rubber element achieves a soft seal between the end of the extrusion element and the liquid inlet end, improving the sealing effect inside the valve body.

[0034] Another objective of this invention is to provide a liquid injection mechanism, the purpose of which is to improve the sealing effect of the one-way valve inside the nozzle.

[0035] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a liquid injection mechanism, including, for example, a one-way valve, and further comprising;

[0036] A liquid storage assembly, the liquid storage assembly including a liquid storage tube communicating with the liquid inlet end, and a piston rod slidably disposed in the liquid storage tube; and,

[0037] The liquid inlet assembly includes a liquid inlet pipe connected to the liquid storage pipe and a control valve disposed in the liquid inlet pipe.

[0038] As a preferred embodiment of the liquid injection mechanism of this utility model, the liquid storage tube includes a liquid storage chamber and a connecting chamber;

[0039] One end of the connecting cavity is connected to the liquid inlet pipe, and the other end is connected to the liquid storage cavity;

[0040] The piston rod is slidably inserted into the liquid storage chamber.

[0041] The beneficial effects of this utility model are as follows: the liquid medicine is injected into the storage tube through the inlet pipe, and then the liquid medicine is squeezed through the valve body by the piston rod to complete the injection. The rubber part inside the valve body realizes a soft seal between the end of the extrusion part and the inlet end, thereby improving the overall sealing effect. Attached Figure Description

[0042] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 An overall schematic diagram of Embodiment 1 is shown;

[0044] Figure 2 Another structural schematic diagram of Embodiment 1 is shown;

[0045] Figure 3 An overall schematic diagram of Embodiment 2 is shown;

[0046] Figure 4 An overall schematic diagram of Embodiment 3 is shown;

[0047] Figure 5 An overall schematic diagram of Embodiment 4 is shown;

[0048] Figure 6 An overall schematic diagram of Embodiment 5 is shown;

[0049] Figure 7 A schematic diagram of Embodiment Six is ​​shown. Detailed Implementation

[0050] To enable those skilled in the art to better understand this utility model, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0051] The terminology used in this invention refers to those general terms currently widely used in the art in consideration of the functionality of this invention; however, these terms may vary according to the intent, precedent, or new technology of those skilled in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of this invention. Therefore, the terminology used in this specification should not be construed as simple names, but rather based on the meaning of the terms and the overall description of this invention.

[0052] Reference Figure 1 and Figure 2 This embodiment provides a one-way valve, including a mounting assembly 100 and a sealing assembly 200.

[0053] The mounting assembly 100 includes a valve body 101 and a liquid passage 102 disposed inside the valve body 101. The liquid passage 102 allows the medicine to pass through. The liquid passage 102 includes an inlet end 102a and an outlet end 102b. The inlet end 102a includes the medicine passing through the channel and the inner wall of the valve body 101 around one end of the liquid passage 102. The outlet end 102b includes the medicine passing through the channel and the inner wall of the valve body 101 around the other end of the liquid passage 102. The inner diameter of the channel through which the medicine passes at the outlet end 102b is 0.15mm-0.3mm.

[0054] The sealing assembly 200 includes an elastic member 201 disposed inside the liquid passage 102, a squeezing member 202 disposed at the end of the elastic member 201, and a rubber member 203 disposed between the squeezing member 202 and the inner wall of the valve body 101; the end of the squeezing member 202 and the liquid inlet end 102a are in soft contact through the rubber member 203.

[0055] The extrusion member 202 and the inner wall of the valve body 101 at the liquid inlet 102a are sealed together by a rubber member 203. When the rubber member 203 contacts the inner wall of the valve body 101, the liquid passage 102 is blocked, preventing the liquid from passing through. When the rubber member 203 separates from the inner wall of the valve body 101, the liquid passage 102 is opened, allowing the liquid to pass through.

[0056] Furthermore, the extrusion member 202 includes a accommodating cavity M and an extrusion surface N, and a rubber member 203 is disposed between the extrusion surface N and the liquid inlet end 102a; the elastic member 201 is located inside the accommodating cavity M; wherein the elastic member 201 is made of a spring or a metal sheet, and the elastic member 201 is installed inside the accommodating cavity M. When the elastic member 201 is compressed, it can be retracted in the accommodating cavity M and protected from being squeezed and damaged.

[0057] The outer wall of the accommodating cavity M is matched with the liquid outlet 102b; the accommodating cavity M can be squeezed and moved by the liquid entering from the liquid inlet 102a to contact the inner wall of the valve body 101 of the liquid outlet 102b, thereby restricting the movement of the accommodating cavity M. At this time, the elastic element 201 is squeezed and compressed in the accommodating cavity M, thereby being protected.

[0058] The liquid passage 102 passes through the interior of the accommodating cavity M, thereby ensuring the flowability of the liquid passage 102.

[0059] The extrusion component 202 includes a mounting cylinder 202a, the interior of which is a receiving cavity M, and the surface of which is an extrusion surface N.

[0060] Among them, such as Figure 1 The rubber part 203 is embedded in the liquid inlet end 102a and mates with the extrusion surface N; the rubber part 203 is made of a sealing ring, which is embedded in the inner wall of the valve body 101 of the liquid inlet end 102a.

[0061] Or, such as Figure 2 The rubber part 203 is fixedly mounted on the extrusion surface N and mates with the liquid inlet end 102a; the rubber part 203 is made of a sealing ring or a sealing gasket.

[0062] The mounting cylinder 202a has multiple perforations 202a-1; the perforations 202a-1 allow the liquid passage 102 to pass through. When the one-way valve is working, the liquid enters from the inlet end 102a, lifting the mounting cylinder 202a and compressing the elastic element 201 until the mounting cylinder 202a comes into contact with the outlet end 102b. At this time, the liquid passes through the inlet end 102a and enters the accommodating cavity M through the perforations 202a-1, and finally sprays out from the outlet end 102b, completing the injection. After the injection is completed, the mounting cylinder 202a moves under the compression of the elastic element 201 and contacts the inlet end 102a. At this time, the rubber element 203 is squeezed between the mounting cylinder 202a and the inlet end 102a to form a seal, preventing external media or impurities from passing through the liquid passage 102 and contacting the liquid.

[0063] Example 2, refer to Figure 3 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that there is a gap between the surface of the liquid outlet 102b and the mounting cylinder 202a, which allows the liquid passage 102 to pass through.

[0064] The valve body 101 inner wall and / or the end of the mounting cylinder 202a near the liquid outlet 102b have a recessed groove 202a-2. When the liquid outlet 102b comes into contact with the mounting cylinder 202a, a gap will be formed in the recess. At this time, the liquid enters from the liquid inlet 102a, lifts the mounting cylinder 202a and compresses the elastic element 201 until the mounting cylinder 202a comes into contact with the liquid outlet 102b. The liquid passes through the liquid inlet 102a and enters the receiving cavity M through the gap, and finally sprays out from the liquid outlet 102b to complete the injection.

[0065] The remaining structure is the same as that in Example 1.

[0066] Example 3, referring to Figure 4 This is the third embodiment of the present utility model. The difference between this embodiment and the first embodiment is that the extrusion member 202 includes a mounting plate 202b and a support column 202c disposed on the surface of the mounting plate 202b.

[0067] There is at least one support column 202c, and the space between the support column 202c and the mounting plate 202b is a receiving cavity M; the other side of the mounting plate 202b is an extrusion surface N.

[0068] The liquid enters from the inlet end 102a, lifting the mounting plate 202b and compressing the elastic element 201 until the mounting support column 202c abuts against the outlet end 102b. The liquid then passes through the inlet end 102a and directly enters the receiving cavity M, finally being sprayed out from the outlet end 102b, completing the injection.

[0069] The remaining structure is the same as that in Example 1.

[0070] Example 4, refer to Figure 5 This is the fourth embodiment of the present invention. The difference between this embodiment and the first embodiment is that: the extrusion surface N is provided with a mounting plate 202d, which covers the liquid passage 102 of the liquid inlet end 102a; the outermost diameter of the mounting plate 202d is larger than the diameter of the liquid passage of the liquid inlet end 102a, which can completely seal it. When the liquid enters from the liquid inlet end 102a, it will first contact the surface of the mounting plate 202d and lift the mounting plate 202d. Then the rubber part 203 separates from the valve body 101 of the liquid inlet end 102a, and the liquid passage 102 is opened to allow the liquid to flow.

[0071] The rubber part 203 is sleeved on the outside of the mounting plate 202d and mates with the liquid inlet end 102a. The outside of the mounting plate 202d is a concave arc shape. The rubber part 203 is made of a sealing ring. The height of the sealing ring is greater than the height of the mounting plate 202d. The rubber part 203 is squeezed to contact the liquid inlet end 102a through the extrusion surface N to achieve a seal.

[0072] The remaining structure is the same as that in Example 1.

[0073] Example 5, refer to Figure 6 This is the fifth embodiment of the present invention. The difference between this embodiment and the first embodiment is that the valve body 101 includes a first valve seat 101a and a second valve seat 101b connected by threads. The first valve seat 101a and the second valve seat 101b are connected by a sealing ring. The valve body 101 is set separately. The first valve seat 101a and the second valve seat 101b are separated for easy processing. After the first valve seat 101a and the second valve seat 101b are connected, a liquid passage 102 is formed inside.

[0074] The inlet end 102a is located on the first valve seat 101a; the outlet end 102b is located on the second valve seat 101b; one end of the elastic element 201 is connected to the first valve seat 101a.

[0075] The remaining structure is the same as that in Example 2.

[0076] Example 6, refer to Figure 7 This is the sixth embodiment of the present invention, which provides a liquid injection mechanism, including a one-way valve, and further comprising:

[0077] Liquid storage assembly 300, including a liquid storage pipe 301 communicating with the liquid inlet 102a, a piston rod 302 slidably disposed in the liquid storage pipe 301; and,

[0078] The liquid inlet assembly 400 includes an inlet pipe 401 connected to a liquid storage pipe 301, and a control valve 402 disposed in the inlet pipe 401. The control valve 402 is made of a one-way flow valve, which can control the liquid medicine in the inlet pipe 401 to enter the liquid storage pipe 301 in only one direction, so as to prevent the liquid medicine from flowing back from the liquid storage pipe 301 to the inlet pipe 401.

[0079] Furthermore, the liquid storage tube 301 includes a liquid storage chamber 301a and a connecting chamber 301b; one end of the connecting chamber 301b is connected to the liquid inlet tube 401, and the other end is connected to the liquid storage chamber 301a; the piston rod 302 is slidably inserted into the liquid storage chamber 301a.

[0080] The drug solution is injected through the inlet pipe 401, passes through the connecting cavity 301b and finally enters the storage cavity 301a. Then, the drug solution is sprayed out through the valve body 101 at the end by the piston rod 302 moving in the storage cavity 301a to complete the injection.

[0081] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A one-way valve, characterized in that: include, Mounting assembly (100), the mounting assembly (100) including valve body (101), liquid passage (102) disposed inside valve body (101); and, Sealing assembly (200); the sealing assembly (200) includes an elastic member (201) disposed inside the liquid passage (102), a squeezing member (202) disposed at the end of the elastic member (201), and a rubber member (203) disposed between the squeezing member (202) and the inner wall of the valve body (101). The liquid passage (102) includes an inlet end (102a) and an outlet end (102b). The end of the extrusion member (202) and the liquid inlet end (102a) make soft contact through the rubber member (203).

2. The one-way valve according to claim 1, characterized in that: The extrusion member (202) includes a receiving cavity (M) and an extrusion surface (N), and the rubber member (203) is disposed between the extrusion surface (N) and the liquid inlet end (102a); The elastic element (201) is located inside the accommodating cavity (M); The outer wall of the accommodating cavity (M) mates with the liquid outlet (102b); The liquid passage (102) passes through the interior of the accommodating cavity (M).

3. The one-way valve according to claim 1 or 2, characterized in that: The extrusion component (202) includes a mounting cylinder (202a), the interior of which is a receiving cavity (M), and the surface of which is an extrusion surface (N). The rubber component (203) is embedded in the liquid inlet end (102a) and cooperates with the extrusion surface (N); Alternatively, the rubber component (203) may be fixedly disposed on the extrusion surface (N) and cooperate with the liquid inlet end (102a); The mounting cylinder (202a) is provided with multiple through holes (202a-1); The perforation (202a-1) allows the liquid passage (102) to pass through.

4. The one-way valve according to claim 1 or 2, characterized in that: The extrusion member (202) includes a mounting cylinder (202a), the interior of which is a receiving cavity (M), and the surface of which is an extrusion surface (N). The rubber component (203) is embedded in the liquid inlet end (102a) and cooperates with the extrusion surface (N); Alternatively, the rubber component (203) may be fixedly disposed on the extrusion surface (N) and cooperate with the liquid inlet end (102a); There is a gap between the surface of the liquid outlet (102b) and the mounting cylinder (202a) that is in contact with the liquid passage (102) for the liquid passage to pass through.

5. The one-way valve according to claim 2, characterized in that: The extrusion member (202) includes a mounting plate (202b) and a support column (202c) disposed on the surface of the mounting plate (202b). At least one support column (202c) is provided, and the space between the support column (202c) and the mounting plate (202b) is a receiving cavity (M). The other side of the mounting plate (202b) is the extrusion surface (N).

6. The one-way valve according to claim 2 or 5, characterized in that: The extrusion surface (N) is provided with a mounting plate (202d), which covers the liquid passage (102) of the liquid inlet end (102a). The rubber component (203) is sleeved on the outside of the mounting plate (202d) and mates with the liquid inlet end (102a).

7. The one-way valve according to any one of claims 1-2 or 5, characterized in that: The valve body (101) includes a first valve seat (101a) and a second valve seat (101b) that are threaded together. The liquid inlet end (102a) is located on the first valve seat (101a); The liquid outlet (102b) is located on the second valve seat (101b).

8. The one-way valve according to claim 7, characterized in that: The inner diameter of the liquid outlet (102b) is 0.15mm-0.3mm.

9. A liquid injection mechanism, characterized in that: Including the one-way valve as described in claim 8, and further comprising: A liquid storage assembly (300), the liquid storage assembly (300) including a liquid storage pipe (301) communicating with the liquid inlet end (102a), a piston rod (302) slidably disposed in the liquid storage pipe (301); and, The liquid inlet assembly (400) includes a liquid inlet pipe (401) connected to the liquid storage pipe (301) and a control valve (402) disposed in the liquid inlet pipe (401).

10. The liquid injection mechanism according to claim 9, characterized in that: The liquid storage tube (301) includes a liquid storage chamber (301a) and a connecting chamber (301b). One end of the connecting cavity (301b) is connected to the liquid inlet pipe (401), and the other end is connected to the liquid storage cavity (301a); The piston rod (302) is slidably inserted into the liquid storage chamber (301a).

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