One-way valve and liquid outlet mechanism

Abstract

The utility model relates to the technical field of needleless syringes, in particular to a one-way valve and a liquid outlet mechanism, which comprise a valve body, a liquid inlet, a liquid outlet and a liquid outlet. A sealing surface is arranged in the liquid passing channel; the porcelain bead is movably arranged in the liquid passing channel and is matched with the sealing surface; the ceramic bead is attached to the sealing surface to separate the liquid passing channel, and the ceramic bead is separated from the sealing surface to open the liquid passing channel; and the limiting piece is positioned in the liquid passing channel and is matched with the porcelain bead. According to the one-way valve and the liquid outlet mechanism, the one-way valve is connected with the liquid storage pipe, liquid medicine is controlled to only enter the liquid storage pipe in a one-way mode, when the piston rod moves in the liquid storage pipe, the liquid medicine in the liquid storage pipe is sprayed out of the spray head to achieve injection, meanwhile, the liquid medicine reversely penetrates through the one-way valve when sprayed out for injection, the porcelain bead is driven to make contact with the sealing face, and therefore a liquid passing channel is cut off; the liquid medicine loss is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of needleless injector especially relates to a one-way valve and liquid outlet mechanism. BACKGROUND

[0002] The needleless injector mainly utilizes the pressure jet principle, generates pressure through the internal pressure device, pushes the medicine liquid in the medicine tube to form an extremely thin medicine liquid column through the micro hole, and makes the medicine liquid penetrate the human body surface instantaneously to reach the subcutaneous, and the medicine liquid is absorbed in the subcutaneous in the form of 3-5 centimeter diameter dispersion.

[0003] The needleless injector includes a medicine inlet pipe, a one-way valve is arranged in the medicine inlet pipe, the one-way valve is used for controlling that the medicine can only enter the inside of the injector in one direction, the spring is used for providing the elastic force for sealing in the one-way valve at present, the existing spring has the risk of failure, so that the medicine inlet pipe cannot play the role of injecting the medicine in one direction. UTILITY MODEL CONTENTS

[0004] In view of the above-mentioned problems existing in the prior art needleless injector, the utility model is provided.

[0005] Therefore, one of the purposes of the utility model is to provide a one-way valve, which aims to eliminate the risk of failure of the spring in the existing one-way valve.

[0006] In order to solve the above technical problems, the utility model provides the following technical scheme: a one-way valve, comprising,

[0007] A valve body is internally provided with a liquid passing channel; a sealing surface is arranged in the liquid passing channel;

[0008] A porcelain bead is movably arranged in the liquid passing channel and cooperates with the sealing surface; the porcelain bead is combined with the sealing surface to separate the liquid passing channel, and the porcelain bead is separated from the sealing surface to open the liquid passing channel; and,

[0009] A limiting piece is arranged in the liquid passing channel and cooperates with the porcelain bead; the movable range of the porcelain bead between the limiting piece and the sealing surface is the moving distance of the porcelain bead.

[0010] As a preferred scheme of the one-way valve of the utility model, the liquid passing channel comprises an inlet end and an outlet end, and the sealing surface is located between the inlet end and the outlet end.

[0011] As a preferred scheme of the one-way valve of the utility model, the sealing surface gradually expands from the inlet end to the outlet end.

[0012] As a preferred scheme of the one-way valve, the limiting piece is formed by the liquid passage being recessed, the shortest distance of the liquid passage recessed section passing through the center of the porcelain bead is less than the inner diameter of the porcelain bead, and the longest distance of the liquid passage recessed section passing through the center of the porcelain bead is greater than the inner diameter of the porcelain bead, so that the movement of the porcelain bead is limited.

[0013] As a preferred scheme of the one-way valve, the limiting piece comprises a limiting column, and the limiting column is matched with the porcelain bead inside the liquid passage.

[0014] As a preferred scheme of the one-way valve, the movement distance of the porcelain bead is 0.1mm-0.3mm.

[0015] The one-way valve has the beneficial effects that the liquid passage is interrupted by the contact between the porcelain bead and the sealing surface, the flow of the liquid medicine is interrupted, when the syringe is filled with liquid, the liquid medicine separates the porcelain bead from the sealing surface, at this time, the liquid medicine can enter the syringe, and when the liquid medicine impacts the porcelain bead reversely, the porcelain bead is driven to contact the sealing surface, so that the liquid passage is interrupted, and the one-way injection of the liquid medicine into the medicine inlet pipe is realized.

[0016] Another object of the utility model is to provide a liquid outlet mechanism, which aims at eliminating the risk of failure of the spring of the one-way valve in the medicine inlet pipe of the existing needleless syringe.

[0017] To solve the above technical problems, the utility model provides the following technical scheme: a liquid outlet mechanism comprising a one-way valve, further comprising;

[0018] A liquid inlet assembly, the liquid inlet assembly comprises an adapter and a hose, the adapter is connected with the hose, and the hose is connected with one end of the valve body.

[0019] A liquid storage assembly, the liquid storage assembly comprises a liquid storage pipe and a piston rod, the liquid storage pipe is connected with the other end of the valve body, the piston rod is movably arranged in the liquid storage pipe, and a liquid outlet hole is arranged at the end of the liquid storage pipe; and

[0020] A spray head, the spray head is arranged at the end of the liquid outlet hole.

[0021] As a preferred scheme of the liquid outlet mechanism, the liquid storage pipe comprises a mounting cavity, a connecting cavity and a liquid storage cavity.

[0022] The valve body is mounted in the mounting cavity, the piston rod is slidably inserted in the liquid storage cavity, and the connecting cavity is connected with the mounting cavity and the liquid storage cavity at two ends respectively.

[0023] As a preferred scheme of the liquid outlet mechanism, the two ends of the limiting column are fixed in the mounting cavity.

[0024] The valve body is provided with a groove, which is clamped on the limiting column.

[0025] As a preferred scheme of the liquid outlet mechanism, the liquid storage assembly further comprises a chuck, and the valve body is externally provided with a limiting ring.

[0026] The limiting ring is located between the chuck and the liquid storage pipe and is fixed by the chuck.

[0027] The beneficial effects of the utility model are as follows: the liquid medicine can only enter the liquid storage pipe in one direction through the connection of the one-way valve and the liquid storage pipe, when the piston rod moves in the liquid storage pipe, the liquid medicine in the liquid storage pipe is sprayed from the spray head to realize injection, and meanwhile, the liquid medicine is sprayed to realize injection, reversely passes through the one-way valve, drives the porcelain bead to contact the sealing surface, thereby cutting off the liquid passage, and loss of the liquid medicine is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings needed to be used in the embodiment description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to the drawings without creative labor.

[0029] Figure 1 The sectional structure schematic diagram of embodiment one is shown;

[0030] Figure 2 The liquid passage schematic diagram of embodiment one is shown;

[0031] Figure 3 The limiting member schematic diagram of embodiment one is shown;

[0032] Figure 4 The limiting member schematic diagram of embodiment two is shown;

[0033] Figure 5 The limiting column installation drawing of embodiment two is shown;

[0034] Figure 6 The overall structure schematic diagram of embodiment three is shown;

[0035] Figure 7 The sectional structure schematic diagram of embodiment three is shown;

[0036] Figure 8 The Figure 7 The A area enlarged view in figure 5 is shown. DETAILED DESCRIPTION

[0037] In order for those skilled in the art to better understand the present application, the present application will be further described in detail below in conjunction with specific embodiments and drawings.

[0038] The terms used in the present application are those general terms currently widely used in the art in consideration of the functions regarding the present application, but the terms can be changed according to the intention of those skilled in the art, precedents, or new technology in the art. In addition, specific terms can be selected by the applicant, and in this case, the detailed meaning thereof will be described in the detailed description of the present application. Therefore, the terms used in the specification should not be understood as simple names, but based on the meaning of the terms and the overall description of the present application.

[0039] Referring to Figures 1-3 The embodiment provides a one-way valve 100, which comprises a valve body 101, a porcelain bead 102 and a limiting piece 103.

[0040] Specifically, the valve body 101 is internally provided with a liquid passing channel 101a for the drug liquid to pass through, wherein the liquid passing channel 101a is divided into a liquid inlet end 101a-1 and a liquid outlet end 101a-2, and the liquid passing channel 101a is internally provided with a sealing surface 101b between the liquid inlet pipe and the liquid outlet end 101a-2; when the drug liquid enters from the liquid inlet pipe, it is discharged from the liquid outlet end 101a-2 after passing through the sealing surface 101b.

[0041] The porcelain bead 102 is movably arranged in the liquid passing channel 101a and cooperates with the sealing surface 101b, the porcelain bead 102 is arranged in a spherical shape, and the porcelain bead 102 is in close contact with the sealing surface 101b to block the liquid passing channel 101a, and the porcelain bead 102 is separated from the sealing surface 101b to open the liquid passing channel 101a, when the porcelain bead 102 is in contact with the sealing surface 101b, the liquid passing channel 101a is no longer provided for the drug liquid to flow, and after the porcelain bead 102 is separated from the sealing surface 101b, the liquid passing channel 101a is opened and can continue to provide the drug liquid to flow.

[0042] The limiting piece 103 is located in the liquid passing channel and cooperates with the porcelain bead 102; the movable range of the magnetic bead 102 between the limiting piece 103 and the sealing surface 101b is the moving distance a of the porcelain bead 102, the limiting piece 103 can control the range of the moving distance a of the porcelain bead 102, and can also avoid the porcelain bead 102 from separating from the liquid passing channel 101a.

[0043] Further, the cross-sectional area of the liquid inlet end 101a-1 is smaller than that of the liquid outlet end 101a-2, the porcelain bead 102 is limited by the limiting member 103 inside the liquid outlet end 101a-2, and the porcelain bead 102 slides inside the liquid outlet end 101a-2 and is in contact with the sealing surface 101b, wherein the sealing surface 101b gradually expands from the liquid inlet end 101a-1 to the liquid outlet end 101a-2, and when the porcelain bead 102 contacts the sealing surface 101b, the contact part of the porcelain bead 102 and the sealing surface 101b is continuous and uninterrupted, thereby achieving the isolation of the liquid passage 101a.

[0044] Preferably, the cross-sections of the liquid inlet end 101a-1 and the liquid outlet end 101a-2 are circular, and the contact part of the liquid outlet end 101a-2 and the sealing surface 101b is provided with a step, wherein the inner diameter of the end of the sealing surface 101b is smaller than the inner diameter of the liquid outlet end 101a-2, thereby forming a step, which facilitates the processing and forming of the liquid passage 101a.

[0045] Further, the limiting member 103 is formed by the inward tapering of the liquid passage 101a, the shortest distance of the inward tapering cross-section of the liquid passage 101a passing through the center of the porcelain bead 102 is smaller than the inner diameter of the porcelain bead 102, and the longest distance of the inward tapering cross-section of the liquid passage 101a passing through the center of the porcelain bead 102 is greater than the inner diameter of the porcelain bead 102, thereby limiting the movement of the porcelain bead 102. After the porcelain bead 102 is limited, it will not isolate the liquid passage 101a and will not affect the flow of liquid. The limiting member 103 is located in the liquid outlet end 101a-2, and the liquid outlet end 101a-2 is tapered inward to form the limiting member 103. The porcelain bead 102 contacts the liquid outlet end 101a-2 and is limited in movement by the contact surface of the limiting member 103, so that it can only move between the contact surfaces of the limiting member 103 and the sealing surface 101b and the porcelain bead 102. Preferably, the inward tapered cross-section of the liquid outlet end 101a-2 is elliptical.

[0046] In this way, the liquid enters the liquid passage 101a from the liquid inlet end 101a-1 and contacts the porcelain bead 102 when passing through the sealing surface 101b. The liquid impacts the porcelain bead 102 away from the sealing surface 101b and contacts the limiting member 103. At this time, the liquid enters the liquid outlet end 101a-2 through the sealing surface 101b and is finally discharged from the gap between the liquid outlet end 101a-2 and the porcelain bead 102. When the liquid enters the liquid passage from the liquid outlet end 101a-2, it will first contact the porcelain bead 102, impact the porcelain bead 102 to contact the sealing surface 101b, isolate the liquid passage 101a, and block the flow of liquid, thereby ensuring that the liquid can only flow in one direction from the liquid inlet end 101a-1.

[0047] Further, the moving distance a of the porcelain bead 102 is 0.1mm-0.3mm, the return liquid is more serious when the moving distance a is large, and the liquid speed is affected when the moving distance a is small, wherein the return liquid is that part of the liquid enters the liquid inlet end 101a-1 when the liquid from the liquid outlet end 101a-2 contacts the sealing surface 101b, and the moving distance a of the porcelain bead 102 is 0.1mm-0.3mm, which can balance the advantages and disadvantages between the two.

[0048] Embodiment 2, refer to Figure 4 and Figure 5 , the second embodiment of the utility model, which is different from the first embodiment is: the limiting piece 103 includes the limiting column 103a, the limiting piece 103 is made of the limiting column 103a, the limiting column 103a is not limited to the column body, it has the face that can contact the porcelain bead 102, can block the porcelain bead 102 and limit it, the limiting column 103a is in the liquid passage 101a inside and cooperates with the porcelain bead 102, its specific limiting column 103a is in the liquid outlet end 101a-2 of the liquid passage, and the porcelain bead 102 is limited, to avoid its wear out the liquid outlet end 101a-2.

[0049] As Figure 4 shown, the limiting column 103a can be fixedly arranged on the inner wall of the liquid outlet end 101a-2;

[0050] As Figure 5 shown, the limiting column 103a can be clamped in the liquid outlet end 101a-2, the liquid outlet end 101a-2 bottom is provided with the recess 101c, and the limiting column 103a is clamped in the recess 101c to block and limit the porcelain bead 102.

[0051] The remaining structure is same as the structure of embodiment 1, and is not repeated here.

[0052] Embodiment 3, refer to Figure 6 and Figure 7 , the third embodiment of the utility model, the embodiment provides a liquid outlet mechanism: it includes one-way valve 100, liquid inlet assembly 200, liquid storage assembly 300 and spray head 400.

[0053] Among them, the liquid inlet assembly 200 includes adapter 201 and hose 202, the adapter 201 is connected with the hose 202, the hose 202 is connected with one end of the valve body 101, the liquid inlet end 101a-1 of the valve body 101 is provided with the convex body 101a-11, the hose 202 is inserted on the convex body 101a-1 and connected with the valve body 101, one end of the adapter 201 is connected with the liquid medicine tank, and the other end is inserted with the hose 202;

[0054] Specifically, the adapter 201 internally comprises a cavity 201a and a flow pipe 201b, the cavity is close to the liquid tank, the flow pipe 201b is connected with the hose 202, and the liquid in the liquid pipe enters the valve body 101 after passing through the adapter 201.

[0055] The liquid storage assembly 300 comprises a liquid storage pipe 301 and a piston rod 302, the liquid storage pipe 301 is connected with the other end of the valve body 101, the piston rod 302 is movably arranged in the liquid storage pipe 301, and a liquid outlet hole 303 is arranged at the end of the liquid storage pipe 301; and a spray head 400 is arranged at the end of the liquid outlet hole 303, wherein the spray head 400 is internally provided with a one-way valve, the liquid in the liquid storage pipe 301 can be sprayed out after passing through the liquid outlet hole 303 and the spray head 400, but the external medium cannot enter the liquid storage pipe 301 through the spray head 400 and the liquid outlet hole 303, wherein the one-way valve in the spray head 400 is different from the one-way valve 100 in the first embodiment.

[0056] Further, the liquid storage pipe 301 comprises a mounting cavity 301a, a connecting cavity 301b and a liquid storage cavity 301c; the valve body 101 is mounted in the mounting cavity 301a, the valve body 101 is externally provided with a sealing ring, and the sealing ring is sealed with the inner wall of the mounting cavity 301a; the piston rod 302 is slidably inserted into the liquid storage cavity 301c; the connecting cavity 301b is connected with the mounting cavity 301a and the liquid storage cavity 301c at two ends respectively.

[0057] The liquid outlet hole 303 is located at the end of the liquid storage cavity 301c, and the piston rod 302 reciprocatingly slides in the liquid outlet cavity to realize a suction and discharge action; when the piston rod 302 performs the suction action, the internal space of the liquid storage cavity 301c is increased, the liquid in the liquid tank is sucked to pass through the liquid passing channel 101a and is stored in the liquid storage cavity 301c through the connecting cavity 301b, the mounting cavity 301a and the liquid passing channel 101a; when the piston rod 302 performs the discharge action, the internal space of the liquid storage cavity 301c is reduced, the internal liquid is squeezed to pass through the liquid outlet hole 303 and the spray head 400 to be sprayed out, at this time, part of the liquid passes through the connecting cavity 301b and the mounting cavity 301a to enter the liquid passing channel to impact the porcelain bead 102 and the sealing surface 101b, at this time, the liquid cannot pass through the liquid passing channel 101a, so that the liquid can be completely sprayed out from the spray head 400.

[0058] Embodiment 4, refer to Figure 8 As the fourth embodiment of the utility model, the difference between the embodiment and the third embodiment is that: the two ends of the limiting column 103a are fixed in the mounting cavity 301a; the valve body 101 is provided with a groove 101c, the groove 101c is clamped on the limiting column 103a, and when the valve body 101 is installed, the liquid outlet end 101a-2 is inserted into the mounting cavity 301a, so that the groove 101c is clamped with the limiting column 103a, and the valve body 101 can be quickly installed and positioned.

[0059] Further, the liquid storage assembly 300 further comprises a chuck 304, and the valve body 101 is provided with a limiting ring 101d outside; the limiting ring 101d is located between the chuck 304 and the liquid storage pipe 301 and is fixed by being extruded by the chuck 304, and the valve body 101 is fixed by the chuck 304.

[0060] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A one-way valve characterized by: The valve body (101) is internally provided with a liquid passing channel (101a); the liquid passing channel (101a) is provided with a sealing surface (101b); The porcelain bead (102) is movably arranged in the liquid passing channel (101a) and cooperates with the sealing surface (101b); the porcelain bead (102) is in close contact with the sealing surface (101b) to block the liquid passing channel (101a), and the porcelain bead (102) is separated from the sealing surface (101b) to open the liquid passing channel (101a); and The limiting member (103) is located inside the liquid passing channel and cooperates with the porcelain bead (102); the movable range of the porcelain bead (102) between the limiting member (103) and the sealing surface (101b) is the moving distance (a) of the porcelain bead (102). The liquid passing channel (101a) comprises a liquid inlet end (101a-1) and a liquid outlet end (101a-2), and the sealing surface (101b) is located between the liquid inlet end (101a-1) and the liquid outlet end (101a-2).

2. The one-way valve of claim 1, wherein: The sealing surface (101b) gradually expands from the liquid inlet end (101a-1) to the liquid outlet end (101a-2).

3. The one-way valve of claim 2, wherein: The limiting member (103) is formed by the inward contraction of the liquid passing channel (101a), the shortest distance of the inwardly contracted cross section of the liquid passing channel (101a) passing through the center of the porcelain bead (102) is less than the inner diameter of the porcelain bead (102), and the longest distance of the inwardly contracted cross section of the liquid passing channel (101a) passing through the center of the porcelain bead (102) is greater than the inner diameter of the porcelain bead (102), thereby limiting the movement of the porcelain bead (102).

4. The one-way valve according to any one of claims 1 to 3, characterized in that: The limiting member (103) comprises a limiting column (103a) which is transverse to the liquid passing channel (101a) and cooperates with the porcelain bead (102).

5. The one-way valve of claim 1, wherein: The moving distance (a) of the porcelain bead (102) is 0.1mm-0.3mm.

6. The check valve according to any one of claims 1-3 and 5, wherein: The one-way valve (100) of any one of claims 1-6 further comprises:

7. A liquid outlet mechanism characterized by The liquid inlet assembly (200) comprises an adapter (201) and a hose (202), the adapter (201) is connected with the hose (202), and the hose (202) is connected with one end of the valve body (101); The liquid storage assembly (300) comprises a liquid storage pipe (301) and a piston rod (302), the liquid storage pipe (301) is connected with the other end of the valve body (101), the piston rod (302) is movably arranged in the liquid storage pipe (301), and a liquid outlet hole (303) is arranged at the end of the liquid storage pipe (301); and The spray head (400) is arranged at the end of the liquid outlet hole (303). The liquid storage pipe (301) comprises a mounting cavity (301a), a connecting cavity (301b) and a liquid storage cavity (301c).

8. The liquid outlet mechanism according to claim 7, characterized in that: ​ The valve body (101) is installed in the installation cavity (301a); the piston rod (302) is slidingly inserted in the liquid storage cavity (301c); and the connecting cavity (301b) is connected with the installation cavity (301a) and the liquid storage cavity (301c) at two ends respectively.

9. The liquid outlet mechanism according to claim 8, characterized in that: Two ends of the limiting column (103a) are fixed in the installation cavity (301a); The valve body (101) is provided with a groove (101c), and the groove (101c) is clamped on the limiting column.

10. The liquid outlet mechanism according to claim 8 or 9, characterized in that: The liquid storage assembly (300) further comprises a chuck (304), and the valve body (101) is provided with a limiting ring (101d) outside; The limiting ring (101d) is located between the chuck (304) and the liquid storage pipe (301) and is pressed and fixed by the chuck (304).

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