CN216060451U

CN216060451U - Suction valve assembly and endoscope

Info

Publication number: CN216060451U
Application number: CN202122608439.0U
Authority: CN
Inventors: 不公告发明人
Original assignee: Hunan Vathin Medical Instrument Co Ltd
Current assignee: Hunan Vathin Medical Instrument Co Ltd
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2022-03-18
Anticipated expiration: 2031-10-28
Also published as: WO2023071853A1

Abstract

The utility model is suitable for the technical field of suction valves, and provides a suction valve component and an endoscope, wherein the suction valve component comprises an elastic sleeve, a valve shell and a piston which are coaxially arranged; one end of the elastic sleeve is fixed on the valve shell, the other end of the elastic sleeve is abutted against the piston, and the piston can axially slide relative to the valve shell; the valve shell comprises an upper valve shell, a lower valve shell and a sealing body, the sealing body is positioned between the upper valve shell and the lower valve shell, and the upper valve shell and the lower valve shell are detachably connected; when the piston is at the first position, the elastic sleeve provides acting force for the piston to extrude the sealing body. The suction valve casing structure comprises an upper valve casing, a lower valve casing and a sealing body, wherein the upper valve casing, the lower valve casing and the sealing body are detachably connected, the sealing body is arranged on the lower valve casing, and then the lower valve casing and the upper valve casing which are provided with the sealing body are connected and fixed, so that the suction valve casing structure can be assembled.

Description

Suction valve assembly and endoscope

Technical Field

The present invention relates to a suction valve assembly, and more particularly, to a suction valve assembly and an endoscope.

Background

In the medical field, the suction valve is often used in cooperation with an endoscope, so that when medical personnel observe a diseased region through the endoscope, fluid in a patient can be sucked through the suction valve, fluid interference in the examination and treatment processes is eliminated, and the observation field of vision is ensured. In an endoscope for general surgery, a suction line communicating with a suction port on a distal end surface is provided in an insertion portion, a suction device functions to communicate the suction line with an externally connected negative pressure source line, the negative pressure source includes a suction pump, a negative pressure machine, and the like, and a button of the suction device is pressed during surgery to communicate the suction port with the negative pressure source line and thereby suck a body fluid of an internal diseased tissue and a excised diseased tissue, and when the pressing operation is released, the communication between the suction line and the negative pressure source line is cut off to stop the suction from the suction port.

In the prior art, the suction valve of the endoscope has complex structural characteristics and poor sealing performance, and after the valve body is opened for suction operation, tissue fluid is often leaked from the shell of the suction valve, so that infection is easily caused during use.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, it is an object of a first aspect of the present invention to provide a suction valve assembly, which includes an elastic sleeve, a valve housing, and a piston, which are coaxially disposed;

one end of the elastic sleeve is fixed on the valve shell, the other end of the elastic sleeve is abutted against the piston, and the piston can axially slide relative to the valve shell;

the valve shell comprises an upper valve shell, a lower valve shell and a sealing body, the sealing body is positioned between the upper valve shell and the lower valve shell, and the upper valve shell and the lower valve shell are detachably connected; when the piston is at the first position, the elastic sleeve provides acting force for the piston to extrude the sealing body.

Furthermore, be equipped with annular first spacing groove on the inner wall of last valve casing, be equipped with annular first spacing arch on the lower valve casing outer wall, go up the valve casing with during lower valve casing connects, first spacing arch embedding first spacing inslot.

Furthermore, a second limiting bulge extending along the axial direction of the valve shell is arranged on the outer wall of the upper valve shell, and a second limiting groove extending along the axial direction of the valve shell is arranged on the outer wall of the lower valve shell; and when the upper valve shell is connected with the lower valve shell, the second limiting protrusion is embedded into the second limiting groove.

Furthermore, a third limiting groove is formed in the sealing body, and a third limiting bulge is formed in the upper valve shell; and when the upper valve shell is connected with the lower valve shell, the third limiting protrusion is embedded into the third limiting groove.

Furthermore, the lower valve casing with be equipped with the toper arch on the terminal surface that the seal contacted, go up the valve casing with when the lower valve casing is connected, the toper arch extrusion the seal makes the axial direction of seal takes place to warp.

Further, when the piston is in the first position, the piston presses the sealing body and deforms the sealing body.

Furthermore, a guide body is arranged on the piston rod, and the outer diameter of the guide body is smaller than the inner diameter of the upper valve shell.

Furthermore, a fourth limiting groove is formed in the elastic sleeve, and a fourth limiting bulge is formed in the upper valve shell; when the elastic sleeve is fixed on the upper valve shell, the fourth limiting protrusion is embedded into the fourth limiting groove.

In a second aspect of the present invention, there is provided a handle for an endoscope, the handle comprising a handle body on which is removably provided the suction valve assembly described above.

In a third aspect of the utility model, there is provided an endoscope comprising the suction valve assembly described above, or the handle described above.

Compared with the prior art, the utility model has the beneficial technical effects that:

1) the utility model divides the valve shell into an upper valve shell, a lower valve shell and a sealing body which are detachably connected. During the equipment, install the seal in the relevant position of lower valve casing terminal surface earlier, then will install and connect fixedly between the lower valve casing of seal and the last valve casing, can accomplish suction valve casing structure's equipment, whole assembly process easy operation is convenient, has improved production efficiency greatly.

2) The sealing body is positioned between the upper valve shell and the lower valve shell, so that the sealing property of a connecting structure between the upper valve shell and the lower valve shell is enhanced; meanwhile, the suction channel is opened and closed through the matching of the piston head and the piston head; the structure of the suction valve is simplified, and meanwhile, the sealing performance of the suction valve is enhanced.

3) According to the utility model, the conical bulge is arranged on the end face of the lower valve shell, which is in contact with the sealing body, so that when the upper valve shell and the lower valve shell are connected, the conical bulge on the lower valve shell extrudes the sealing body to deform the sealing body, so that the sealing body is in close contact with the upper valve shell and the lower valve shell, and the sealing property of the valve shell is further enhanced.

4) When the piston is kept at the first position, the piston head of the piston extrudes the sealing body and deforms the sealing body, so that interference fit is formed between the piston head of the piston and the sealing body; therefore, the sealing connection between the piston head of the piston and the sealing body can be further ensured, and the partition of the suction channel is realized.

5) According to the utility model, the elastic sleeve is provided with the fourth limiting groove, the upper valve shell is provided with the fourth limiting bulge corresponding to the fourth limiting groove in position and structure, and when the elastic sleeve is assembled on the upper valve shell, the fourth limiting bulge is embedded into the fourth limiting groove to play a limiting role.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention or in the description of the prior art will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of a suction valve assembly according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the suction valve assembly of FIG. 1 in a split configuration;

FIG. 3 is a schematic view of the upper valve housing construction of FIG. 2;

FIG. 4 is a cross-sectional view of the upper valve housing structure of FIG. 3;

FIG. 5 is a schematic view of the lower valve housing of FIG. 2;

FIG. 6 is a cross-sectional view of the lower valve housing construction of FIG. 5;

FIG. 7 is an enlarged view of a portion of the lower valve housing structure of FIG. 6;

FIG. 8 is a schematic view of the seal structure shown in FIG. 2;

FIG. 9 is a cross-sectional view of the seal body construction shown in FIG. 8;

FIG. 10 is a schematic view of the piston arrangement of FIG. 2;

FIG. 11 is a schematic view of the elastomeric cap of FIG. 2;

FIG. 12 is a cross-sectional view of the elastomeric cap of FIG. 11;

FIG. 13 is a cross-sectional view of the overall construction of a suction valve assembly in accordance with an embodiment of the present invention;

in the figure: 1-elastic sleeve, 11-fourth limiting groove, 2-valve shell, 21-upper valve shell, 211-first limiting groove, 212-second limiting bulge, 213-third limiting bulge, 214-fourth limiting bulge, 22-lower valve shell, 221-first limiting bulge, 222-second limiting groove, 223-conical bulge, 23-sealing body, 231-third limiting groove, 3-piston and 31-guiding body.

Detailed Description

The following description provides many different embodiments, or examples, for implementing different features of the utility model. The particular examples set forth below are illustrative only and are not intended to be limiting.

Endoscopes are a common medical device. In the prior art, a conventional endoscope includes an operation portion (also referred to as a handle) and an insertion portion. The handle part is used for controlling the insertion part to enter a human body, and the orientation of the insertion part is controlled through the handle part, so that an image of a focus part is provided for a doctor.

Meanwhile, a suction valve is often arranged on the handle part of the endoscope, and a suction button is mainly used for controlling the suction function of the distal end of the insertion part, so that liquid, debris and the like at the focus part are sucked out of the body, and the observation definition of the endoscope image is improved. The endoscope insertion portion is provided with a suction line communicating with the suction port of the distal end face, a suction valve for communicating the suction line with an externally connected negative pressure source line, the negative pressure source includes a suction pump, a negative pressure machine, and the like, and a button of the suction device is pressed during surgery to communicate the suction port with the negative pressure source line to suck the suction port, thereby sucking the body fluid of the internal diseased tissue and the excised diseased tissue, and when the pressing operation is released, the communication between the suction line and the negative pressure source line is cut off to stop the suction from the suction port.

The valve casing structure of the endoscope suction valve in the prior art is usually composed of an inner valve casing and an outer valve casing, and the suction valve has a complex structure and a complex process flow during assembly; on the other hand, the sealing performance is poor, and after the valve body is opened for suction operation, the tissue fluid is often leaked from the shell of the suction valve, so that infection is easily caused during use.

In view of this, as shown in fig. 1 to 13, one embodiment of the present invention provides a suction valve assembly including an elastic sleeve 1, a valve housing 2, and a piston 3, which are coaxially disposed;

one end of the elastic sleeve 1 is fixed on the valve casing 2, the other end of the elastic sleeve 1 is abutted with the piston 3, and the piston 3 can axially slide relative to the valve casing 2;

the valve casing 2 comprises an upper valve casing 21, a lower valve casing 22 and a sealing body 23, wherein the sealing body 23 is positioned between the upper valve casing 21 and the lower valve casing 22, and the upper valve casing 21 and the lower valve casing 22 are detachably connected; when the piston 3 is in the first position, the elastic sleeve 1 provides a force for the piston 3 to press the sealing body 23.

In the scheme, the elastic sleeve 1 is sleeved on the piston 3. One end of the valve body is abutted against the piston 3, and the other end of the valve body is fixedly connected to the valve shell 2; therefore, when the piston 3 is pressed by the outside to move the piston 3 in the axial direction of the valve housing 2, the piston 3 presses the elastic sleeve 1, so that the elastic sleeve 1 deforms; when the external pressing force applied to the piston 3 disappears, the piston 3 slides towards the direction far away from the valve shell 2 under the elastic action of the elastic sleeve 1 until the piston head of the piston 3 contacts the sealing body 23.

In the above embodiment, the valve housing 2 is divided into an upper valve housing 21, a lower valve housing 22 and a sealing body 23 which are detachably connected. During the equipment, install the seal 23 in the relevant position of lower valve casing 22 terminal surface earlier, then will install and connect fixedly between the lower valve casing 22 of seal 23 and the last valve casing 21, can accomplish the equipment of suction valve casing 2 structures, whole assembly process easy operation is convenient, has improved production efficiency greatly.

The sealing body 23 is made of plastic, and has a lower hardness than the valve housing 2. Preferably, the sealing body 23 is made of a silicone material.

Meanwhile, when the piston 3 is in the first position, the elastic sleeve 1 provides a force for pressing the piston head of the piston 3 against the sealing body 23. Wherein the first position refers to a position in which the piston 3 is not pressed by the outside.

That is, in the above-described embodiment, the sealing body 23 is engaged with the piston head of the piston 3 to open and close the suction passage in the suction valve. Wherein the suction channel refers to a passage between a suction port at the distal end of the endoscope and an external negative pressure source.

Specifically, the method comprises the following steps: when the piston 3 is at the first position, under the action of the elastic sleeve 1, the piston 3 presses the sealing body 23, so that the piston 3 is in close contact with the sealing body 23, and at the moment, the suction channel of the suction valve is in a closed state; when the piston 3 is pressed by the external force (e.g. the pressing of the end of the piston 3 by the finger of the operator), the piston 3 slides along the axial direction of the valve housing 2, i.e. when the piston 3 is in the second position, a gap is generated between the piston head and the sealing body 23, so that the suction channel of the suction valve is opened, and the suction function is realized.

The sealing body 23 in the above scheme is positioned between the upper valve casing 21 and the lower valve casing 22, which not only enhances the sealing performance of the connection structure between the upper valve casing 21 and the lower valve casing 22, but also realizes the opening and closing of the suction channel through the cooperation with the piston head; the structure of the suction valve is simplified, and meanwhile, the sealing performance of the suction valve is enhanced.

Preferably, as shown in fig. 4 and 6, an annular first limiting groove 211 is formed in an inner wall of the upper valve housing 21, an annular first limiting protrusion 221 is formed in an outer wall of the lower valve housing 22, and when the upper valve housing 21 and the lower valve housing 22 are connected, the first limiting protrusion 221 is embedded in the first limiting groove 211.

In the above scheme, a connection structure between the upper valve housing 21 and the lower valve housing 22 is provided, that is, the connection between the upper valve housing 21 and the lower valve housing 22 is realized by the cooperation of the annular limiting groove and the annular limiting protrusion. The "ring" may be closed or partially closed.

Specifically, an annular first limiting protrusion 221 is provided on the outer wall of the lower valve casing 22, and a first limiting groove 211 corresponding to the position and shape of the first limiting protrusion 221 is provided on the inner wall of the opposite end of the upper valve casing 21 and the lower valve casing 22; when the upper and

lower valve housings

21 and 22 are coupled, the first stopper protrusion 221 is fitted into the first stopper groove 211.

Of course, the positions of the first stopper protrusion 221 and the first stopper groove 211 may be interchanged, that is, the lower valve housing 22 may be provided with the annular first stopper groove 211, and the upper valve housing 21 may be provided with the annular first stopper protrusion 221.

The core utility model of this embodiment is that the valve body structure of the suction valve is designed to be split up and down, and this embodiment provides a connection structure of the upper valve housing 21 and the lower valve housing 22. In the alternative, other common snap-fit structures may be provided, as long as the detachable connection between the upper valve housing 21 and the lower valve housing 22 can be achieved, which is not limited herein.

Preferably, as shown in fig. 3 to 6, the outer wall of the upper valve casing 21 is provided with a second limiting protrusion 212 extending along the axial direction of the valve casing 2, and the outer wall of the lower valve casing 22 is provided with a second limiting groove 222 extending along the axial direction of the valve casing 2; when the upper valve housing 21 and the lower valve housing 22 are connected, the second limiting projection 212 is inserted into the second limiting groove 222.

After the upper and

lower valve casings

21 and 22 are axially coupled by the first limit grooves 211 and the first limit projections 221, in some use cases, there may also occur a relative rotation of the upper and

lower valve casings

21 and 22 in the circumferential direction.

Therefore, in the above-described aspect, the second limit protrusion 212 and the second limit groove 222 extending in the axial direction of the valve housing 2 are provided on the outer walls of the upper valve housing 21 and the lower valve housing 22, so that when the upper valve housing 21 and the lower valve housing 22 are connected, the upper valve housing 21 and the lower valve housing 22 are limited in the circumferential direction. The outer wall of the upper valve casing 21 may be provided with the second limiting protrusion 212, the outer wall of the lower valve casing 22 may be provided with the second limiting groove 222, the outer wall of the lower valve casing 22 may be provided with the second limiting protrusion 212, and the outer wall of the upper valve casing 21 is provided with the second limiting groove 222, which is not limited herein.

Meanwhile, when the suction valve is mounted on the handle of the endoscope, the second limiting bulge 212 is abutted against the mounting seat in the shell of the endoscope handle, so that the suction valve is mounted on the endoscope handle.

Preferably, the second position-limiting protrusion 212 is a straight protrusion, and the second position-limiting groove 222 is a straight groove.

Preferably, a third limiting groove 231 is formed in the sealing body 23, and a third limiting protrusion 223 is formed on the upper valve casing 21; when the upper valve housing 21 and the lower valve housing 22 are coupled, the third stopper protrusion 223 is fitted into the third stopper groove 231.

In the above configuration, the sealing action of the sealing body 23 when connecting the upper valve housing 21 and the lower valve housing 22 is further enhanced. A third stopper projection 223 and a third stopper groove 231 are provided on the surfaces of the sealing body 23 and the upper valve case 21 that contact each other, respectively. When the upper and

lower valve housings

21 and 22 are coupled, the third stopper projection 223 is fitted into the third stopper groove 231.

Of course, the positions of the third limiting groove 231 and the third limiting projection 223 may be interchanged, that is, the sealing body 23 is provided with the third limiting projection 223, and the upper valve housing 21 is provided with the third limiting groove 231, which is not limited herein.

Further, as shown in fig. 6 and 7, a tapered projection 223 is provided on an end surface of the lower valve casing 22 contacting the sealing body 23, and when the upper valve casing 21 and the lower valve casing 22 are connected, the tapered projection 223 presses the sealing body 23 to deform the sealing body 23 in the axial direction.

The conical projection 223 means that the projection is not rounded off in its profile, on which projection a point is provided. In the above scheme, the tapered bulge 223 is arranged on the end face of the lower valve casing 22, which is in contact with the sealing body 23, so that when the upper valve casing 21 and the lower valve casing 22 are connected, the tapered bulge 223 on the lower valve casing 22 extrudes the sealing body 23, the sealing body 23 deforms, the sealing body 23 is in close contact with the upper valve casing 21 and the lower valve casing 22, and the sealing performance of the valve casing 2 is further enhanced.

Further, as shown in fig. 13, when the piston 3 is in the first position, the piston 3 presses the sealing body 23 and deforms the sealing body 23.

In the above scheme, the elastic size of the elastic sleeve 1 is limited. When the piston 3 is at the first position, due to the elastic action of the elastic sleeve 1 itself, the elastic sleeve 1 generates a pressing force in the axial direction of the piston 3 to the upstream end of the piston 3 (the end close to the elastic sleeve 1 is the upstream end) (the direction of the pressing force is directed upstream of the piston 3 in the axial direction of the piston 3), thereby holding the piston 3 at the first position.

Preferably, when the piston 3 is kept at the first position, the piston head of the piston 3 presses the sealing body 23 and deforms the sealing body 23, so that an interference fit is formed between the piston head of the piston 3 and the sealing body 23. Therefore, the sealing connection between the piston head of the piston 3 and the sealing body 23 can be further ensured, and the suction channel is blocked.

Further, as shown in fig. 10 and 13, a guide body 31 is provided on the piston rod, and an outer diameter of the guide body 31 is smaller than an inner diameter of the upper valve housing 21.

When the piston 3 slides relative to the valve housing 2, the piston 3 is easily deviated during the sliding process because the outer diameter of the piston rod of the piston 3 is smaller than the inner diameter of the upper valve housing 21. In the above-described embodiment, the guide body 31 is provided on the piston rod of the piston 3, thereby solving the above-described problem. The outer diameter of the guide body 31 is slightly smaller than the inner diameter of the upper valve housing 21.

Further, as shown in fig. 3, 11 and 12, a fourth limiting groove 11 is formed on the elastic sleeve 1, and a fourth limiting protrusion 214 is formed on the upper valve casing 21; when the elastic sleeve 1 is fixed to the upper valve housing 21, the fourth limit protrusion 214 is inserted into the fourth limit groove 11.

As mentioned above, the material of the elastic sleeve 1 is preferably a plastic material, which has a lower hardness than the valve housing 2. Therefore, when the elastic sleeve 1 made of soft material is assembled to the valve housing 2, problems such as curling and twisting are likely to occur. In the above scheme, through being equipped with fourth spacing groove 11 on elastic sleeve 1, be equipped with on last valve casing 21 with the corresponding fourth spacing arch 214 of fourth spacing groove 11 position and structure, when assembling last valve casing 21 with elastic sleeve 1, fourth spacing arch 214 imbeds fourth spacing inslot 11, plays limiting displacement.

In another embodiment of the present invention, there is provided an endoscope handle comprising a handle body having the suction valve assembly described above removably disposed thereon.

In another embodiment of the utility model, an endoscope is provided, which comprises the suction valve assembly or the handle.

When the endoscope is used for suction operation, the tightness of the suction valve is better, the leakage can not occur in the normal use process,

the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A suction valve assembly is characterized by comprising an elastic sleeve (1), a valve shell (2) and a piston (3) which are coaxially arranged;

one end of the elastic sleeve (1) is fixed on the valve shell (2), the other end of the elastic sleeve (1) is abutted against the piston (3), and the piston (3) can axially slide relative to the valve shell (2);

the valve shell (2) comprises an upper valve shell (21), a lower valve shell (22) and a sealing body (23), the sealing body (23) is positioned between the upper valve shell (21) and the lower valve shell (22), and the upper valve shell (21) is detachably connected with the lower valve shell (22); when the piston (3) is at the first position, the elastic sleeve (1) provides acting force for the piston (3) to extrude the sealing body (23).

2. The attraction valve assembly as set forth in claim 1, characterized in that said upper valve casing (21) is provided on an inner wall thereof with an annular first limit groove (211), and said lower valve casing (22) is provided on an outer wall thereof with an annular first limit projection (221), said first limit projection (221) being fitted into said first limit groove (211) when said upper valve casing (21) and said lower valve casing (22) are coupled.

3. The attraction valve assembly as claimed in claim 1, wherein the upper valve casing (21) is provided on an outer wall thereof with a second limit projection (212) extending in the axial direction of the valve casing (2), and the lower valve casing (22) is provided on an outer wall thereof with a second limit groove (222) extending in the axial direction of the valve casing (2); when the upper valve casing (21) and the lower valve casing (22) are connected, the second limit protrusion (212) is embedded into the second limit groove (222).

4. The suction valve assembly as claimed in claim 1, wherein a third limiting groove (231) is provided on the sealing body (23), and a third limiting protrusion (213) is provided on the upper valve casing (21); when the upper valve casing (21) and the lower valve casing (22) are connected, the third limiting protrusion (213) is embedded in the third limiting groove (231).

5. The suction valve assembly as set forth in claim 4, wherein a tapered projection (223) is provided on an end surface of said lower valve casing (22) contacting said sealing body (23), and when said upper valve casing (21) and said lower valve casing (22) are connected, said tapered projection (223) presses said sealing body (23) and deforms said sealing body (23) in an axial direction.

6. Suction valve assembly according to claim 1, characterized in that the piston (3) presses the sealing body (23) and deforms the sealing body (23) when the piston (3) is in the first position.

7. Suction valve assembly according to claim 2, characterized in that the piston (3) rod is provided with a guide body (31), the outer diameter of the guide body (31) being smaller than the inner diameter of the upper valve housing (21).

8. The suction valve assembly as claimed in claims 1 to 7, wherein said elastic sleeve (1) is provided with a fourth limiting groove (11), and said upper valve casing (21) is provided with a fourth limiting projection (214); when the elastic sleeve (1) is fixed on the upper valve shell (21), the fourth limiting protrusion (214) is embedded into the fourth limiting groove (11).

9. An endoscope handle comprising a handle body having removably disposed thereon a suction valve assembly as defined in any one of claims 1 to 8.

10. An endoscope comprising a suction valve assembly as claimed in claims 1 to 8 or comprising a handle as claimed in claim 9.