Endoscope, air-water valve, and backflow assembly

Abstract

The present application relates to an endoscope, an air-water valve, and a backflow assembly. The backflow assembly comprises an anti-backflow member. The anti-reflux member comprises a fixing part and an elastic deformation part arranged on a circumferential side of the fixing part. The fixing part is configured to cooperate with a connecting part in an air outlet channel of the air-water valve. Along a flow direction of an air flow in a forward direction of the air outlet channel, a diameter of the elastic deformation part sequentially increases until the elastic deformation part abuts against an inner wall of the air outlet channel. When the air outlet channel has an air flow in a forward direction, the air flow in the forward direction presses an outer circumference of the elastic deformation part, and the outer circumference contracts inward, such that the air flow in the forward direction passes between the elastic deformation part and the inner wall of the air outlet channel; when the air outlet channel has an air flow in a backward direction, the air flow in the backward direction presses the outer circumference of the elastic deformation part, and the outer circumference expands outward, so as to prevent the air flow in the backward direction from passing through. That is, on the basis of ensuring the normal flow of the air flow in the forward direction, a gas cylinder can also be prevented from being contaminated.

Description

Endoscope, air-water valve and backflow assembly TECHNICAL FIELD

[0001] The present application relates to the technical field of endoscopes, in particular to an endoscope, an air-water valve and a backflow assembly. BACKGROUND

[0002] An endoscope is a tube with a light and a camera that can be inserted into the stomach through the mouth or other natural orifices. During an endoscopy, air is injected into the patient's digestive tract through the insertion tube of the endoscope to facilitate insertion of the tube. At the same time, due to the adhesion of the patient's body fluids to the lens surface of the camera, there is a high possibility that the lens will be obscured, affecting the doctor's operation. Therefore, an air-water valve is provided on the handle of the endoscope to control the opening and closing of the water channel and the air channel in the insertion tube.

[0003] However, since the air channel is directly connected to the patient's body, the gas or liquid in the patient's body can easily flow back into the gas cylinder, causing the gas cylinder to be contaminated. SUMMARY

[0004] Therefore, it is necessary to provide an endoscope, an air-water valve and a backflow assembly to solve the problem that gas or liquid in the patient's body easily flows back into the gas cylinder.

[0005] A backflow assembly includes an anti-backflow member, the anti-backflow member includes a fixed portion and an elastically deformable portion arranged on the circumferential side of the fixed portion, the fixed portion is used to cooperate with a connecting portion in an air outlet channel of an air-water valve, and the diameter of the elastically deformable portion increases in sequence along the positive direction of the air flow in the air outlet channel until it abuts against the inner wall of the air outlet channel. When the air outlet channel has a positive direction air flow, the positive direction air flow extrudes the outer periphery of the elastically deformable portion, the outer periphery shrinks inward, and the positive direction air flow passes between the elastically deformable portion and the inner wall of the air outlet channel; when the air outlet channel has a reverse direction air flow, the reverse direction air flow extrudes the outer periphery of the elastically deformable portion, the outer periphery expands outward, and the reverse direction air flow is hindered.

[0006] In one embodiment, along the axial direction of the elastically deformable portion, the elastically deformable portion has a closed end and an open end, the diameter of the closed end is smaller than the diameter of the open end, and the fixed portion is arranged on the inner periphery of the elastically deformable portion to form the closed end.

[0007] In one embodiment, the fixed portion extends from the closed end to the open end, and a rib is arranged between the fixed portion and the inner wall of the elastically deformable portion, along the axial direction of the elastically deformable portion, the rib is lower than the open end.

[0008] In one of the embodiments, the reverse flow assembly further comprises a gas pipe joint, the gas pipe joint comprising a pipe body and an abutting portion arranged at one end of the pipe body, the abutting portion abutting against the fixing portion, and the pipe body being spaced apart from the elastically deformable portion.

[0009] In one of the embodiments, the abutting portion protrudes out of the pipe body.

[0010] In one of the embodiments, the pipe body comprises a first pipe segment and a second pipe segment in communication with each other, the first pipe segment having a larger inner diameter than the second pipe segment, a crossbeam is arranged in the first pipe segment, and the abutting portion is fixed at the center of the first pipe segment through the crossbeam.

[0011] In one of the embodiments, the width of the crossbeam is smaller than the inner hole diameter of the second pipe segment near one end of the first pipe segment.

[0012] A gas-water valve comprises a valve body, an air inlet channel and an air outlet channel are arranged on the valve body and are in communication, the air inlet channel is used for communicating with a gas cylinder, the air outlet channel is used for communicating with an insertion tube, and a reverse flow assembly is arranged in the air outlet channel.

[0013] In one of the embodiments, a recess structure is arranged in one of the connecting portion and the fixing portion, and a protruding structure is arranged on the other one, and the recess structure and the protruding structure are matched.

[0014] An endoscope comprises an operating handle and an insertion tube, a gas-water valve of the endoscope is arranged on the operating handle, and an air outlet channel of the gas-water valve communicates with the insertion tube.

[0015] The endoscope, the gas-water valve and the reverse flow assembly are as above, the anti-backflow member is fixed by the fixing portion and the connecting portion in the air outlet channel. When the gas flows from the air inlet channel to the air outlet channel through the inner cavity of the gas-water valve, due to the flow direction of the forward gas flow along the air outlet channel, the diameter of the elastically deformable portion increases in turn, i.e. the elastically deformable portion guides the gas flow to the outer periphery of the elastically deformable portion to extrude the outer periphery, so that the outer periphery shrinks inwardly to form a gap with the inner wall of the air outlet channel, and the forward gas flow flows from the gap to the insertion tube through the air outlet channel. When the gas or liquid in the patient's body flows from the insertion tube to the air outlet channel, the gas or liquid extrudes the elastically deformable portion from the other side of the elastically deformable portion, at this time, the outer periphery expands outwardly and is further connected closely with the inner wall of the air outlet channel, so as to hinder the reverse gas flow, i.e. to prevent the gas cylinder from being contaminated. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 is a schematic view of the sectional structure of the gas-water valve in one of the embodiments.

[0017] Fig. 2 is a schematic view of the structure of the anti-backflow member in an embodiment.

[0018] Fig. 3 is a schematic view of the structure of the tracheal connector in an embodiment.

[0019] Fig. 4 is a schematic view of the sectional structure of the backflow assembly in an embodiment.

[0020] Fig. 5 is a schematic view of the sectional structure of the valve body in an embodiment.

[0021] Reference signs: 10, valve body; 11, air inlet channel; 12, air outlet channel; 13, connecting portion; 20, valve core; 100, anti-backflow member; 110, fixed portion; 111, recess structure; 120, elastically deformable portion; 121, closed end; 122, open end; 123, rib; 200, tracheal connector; 210, tube body; 211, first tube segment; 212, second tube segment; 213, abutting portion; 214, cross beam. DETAILED DESCRIPTION

[0022] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a variety of ways beyond the specific embodiments described herein without departing from the scope of the present application, and it is understood that similar changes in form and substitution of equivalent ones can be made by those skilled in the art without departing from the spirit and scope of the present application, and therefore the present application is not limited to the specific embodiments disclosed below.

[0023] In the description of the present application, it should be understood that if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0024] In addition, if these terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "multiple" appears, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0025] In the present application, unless specifically defined otherwise, if there is an appearance of the terms "installation", "connection", "connection", "fixation" and the like, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] In the present application, unless specifically defined otherwise, if there is a description of the first feature "on" or "under" the second feature and the like, it means that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0027] It should be noted that if an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are for illustrative purposes only and are not the only embodiment.

[0028] In combination with FIG. 1, the valve body 10 is provided with an inlet passage 11 and an outlet passage 12, and the valve core 20 moves up and down in the valve body 10, which can make the inlet passage 11 and the outlet passage 12 communicate or not communicate. Among them, the inlet passage 11 communicates with the gas cylinder, and the outlet passage 12 communicates with the insertion tube. When the inlet passage 11 and the outlet passage 12 are communicated, the gas in the gas cylinder can flow into the insertion tube in sequence through the inlet passage 11, the inner cavity of the valve body 10 and the outlet passage 12. The gas flow direction at this time is defined as the positive direction. The gas or liquid in the patient's body flows from the insertion tube to the outlet passage 12, which is the negative direction.

[0029] In combination with FIG. 1 and FIG. 2, an embodiment of the present application discloses a backflow assembly, the backflow assembly comprising a backflow prevention member 100, the backflow prevention member 100 comprising a fixed portion 110 and an elastically deformable portion 120 arranged on the periphery of the fixed portion 110, the fixed portion 110 being configured to cooperate with a connecting portion 13 in an air outlet channel 12 of a gas-water valve, and the diameter of the elastically deformable portion 120 gradually increases along the positive direction of the airflow in the air outlet channel 12 until the elastically deformable portion 120 abuts against the inner wall of the air outlet channel 12. When the air outlet channel 12 has a positive direction airflow, the positive direction airflow extrudes the periphery of the elastically deformable portion 120, and the periphery is inwardly contracted so as to facilitate the positive direction airflow to pass between the elastically deformable portion 120 and the inner wall of the air outlet channel 12; when the air outlet channel 12 has a reverse direction airflow, the reverse direction airflow extrudes the periphery of the elastically deformable portion 120, and the periphery is outwardly expanded so as to hinder the reverse direction airflow to pass.

[0030] In the present embodiment, the backflow prevention member 100 is fixed by the cooperation between the fixed portion 110 and the connecting portion 13 in the air outlet channel 12. When the gas flows from the air inlet channel 11 to the air outlet channel 12 through the inner cavity of the gas-water valve, due to the flow direction along the positive direction of the airflow in the air outlet channel 12, the diameter of the elastically deformable portion 120 gradually increases, i.e., the elastically deformable portion 120 guides the airflow to the periphery of the elastically deformable portion 120 to extrude the periphery, so that the periphery is inwardly contracted to form a gap between the elastically deformable portion 120 and the inner wall of the air outlet channel 12, and the positive direction airflow flows from the gap to the insertion tube through the air outlet channel 12. When the gas or liquid in the patient's body flows from the insertion tube to the air outlet channel 12, the gas or liquid extrudes the elastically deformable portion 120 from the other side of the elastically deformable portion 120, at this time, the periphery is outwardly expanded, and is further tightly connected with the inner wall of the air outlet channel 12, so as to hinder the reverse direction airflow to pass, i.e., to prevent the gas cylinder from being contaminated.

[0031] In some embodiments, along the axial direction of the elastically deformable portion 120, the elastically deformable portion 120 has a closed end 121 and an open end 122, the diameter of the closed end 121 is smaller than the diameter of the open end 122, and the fixed portion 110 is arranged on the inner periphery of the elastically deformable portion 120 to form the closed end 121.

[0032] In some embodiments, along the axial direction of the elastically deformable portion 120, the diameter of the closed end 121 is smaller than the diameter of the open end 122, i.e., the elastically deformable portion 120 has a horn structure, and the positive direction airflow is guided by the outer wall of the elastically deformable portion 120 and deformed, so that a gap is formed between the periphery of the elastically deformable portion 120 and the air outlet channel 12, and the positive direction airflow passes through the gap. When the reverse direction airflow impacts the elastically deformable portion 120 from the open end 122, the open end 122 is outwardly expanded, and the periphery of the elastically deformable portion 120 further abuts against the inner wall of the air outlet channel 12 to hinder the reverse direction airflow to pass.

[0033] In some embodiments, the outer wall of the elastic deformation portion is provided with a triggering mechanism, and the inner side of the elastic deformation portion is provided with a supporting structure. When the positive airflow triggers the triggering mechanism, the supporting structure drives the elastic deformation portion to contract inward, so that the positive airflow can pass through the outer periphery of the elastic deformation portion.

[0034] In some embodiments, the fixed portion 110 extends from the closed end 121 to the open end 122, and the rib 123 is arranged between the fixed portion 110 and the inner wall of the elastic deformation portion 120. Along the axial direction of the elastic deformation portion 120, the rib 123 is lower than the open end 122.

[0035] In the present embodiment, along the axial direction of the elastic deformation portion 120, the elastic deformation portion 120 includes a supporting section and a deformation section connected in sequence, the diameter of the deformation section is greater than that of the supporting section, the rib 123 is arranged between the supporting section and the fixed portion 110, and the deformation section is not supported by the fixed portion 110.

[0036] The number of ribs 123 can be multiple, and the multiple ribs 123 are arranged at intervals along the circumferential direction of the fixed portion 110. The ribs 123 are used to support the supporting section on the inner side of the elastic deformation portion 120, so as to reduce the deformation of the supporting section. The rib 123 is lower than the open end 122, so that the deformation section is not supported, that is, when the positive airflow impacts, the deformation section can contract inward, and when the reverse airflow impacts, the deformation section can expand outward. When installed, the deformation section can abut against the inner wall of the air outlet channel 12.

[0037] In some embodiments, in combination with FIGS. 3 and 4, the reverse flow assembly further includes a tracheal connector 200, which includes a tube body 210 and an abutting portion 213 arranged at one end of the tube body 210. The abutting portion 213 abuts against the fixed portion 110, so that the tube body 210 is arranged at intervals with the elastic deformation portion 120.

[0038] In the present embodiment, one end of the tube body 210 away from the abutting portion 213 is used to communicate with the insertion tube, and the abutting portion 213 abuts against the fixed portion 110, so that the tracheal connector 200 is arranged at intervals with the anti-backflow piece 100. After the positive airflow passes through the outer periphery of the anti-backflow piece 100, it can flow into the tube body 210 from the gap between the tracheal connector 200 and the anti-backflow piece 100.

[0039] In some embodiments, the abutting portion 213 protrudes outwardly from the tube body 210.

[0040] In the embodiment, the abutting portion 213 protrudes out of the pipe body 210, the fixing portion 110 is located in the elastically deformable portion 120 or the fixing portion 110 is flush with the elastically deformable portion 120 on the side surface close to the gas pipe joint 200, and when the abutting portion 213 abuts against the fixing portion 110, the pipe body 210 is spaced apart from the elastically deformable portion 120, so that the normal direction airflow flowing out of the anti-backflow device 100 can flow out of the pipe body 210.

[0041] In some other embodiments, the fixing portion extends out of the open end, the abutting portion is flush with one end of the pipe body or is located in the pipe body, and the fixing portion abuts against the abutting portion, so that the pipe body is spaced apart from the elastically deformable portion, and the normal direction airflow flowing out of the anti-backflow device can flow out of the pipe body.

[0042] In some embodiments, the pipe body 210 includes a first pipe segment 211 and a second pipe segment 212 that are in communication with each other, the first pipe segment 211 has a larger inner diameter than the second pipe segment 212, the first pipe segment 211 is provided with a crossbeam 214, and the abutting portion 213 is fixed at the center of the first pipe segment 211 through the crossbeam 214, so that the normal direction airflow flowing out of the anti-backflow device 100 can flow from the first pipe segment 211 to the second pipe segment 212.

[0043] In some embodiments, the width of the crossbeam 214 is smaller than the inner hole diameter of the end of the second pipe segment 212 close to the first pipe segment 211, so that the airflow can flow from the first pipe segment 211 to the second pipe segment 212.

[0044] In some other embodiments, the width of the crossbeam is greater than the inner hole diameter of the end of the second pipe segment close to the first pipe segment, and the crossbeam is spaced apart from the end of the second pipe segment close to the first pipe segment, so that the normal direction airflow flowing out of the anti-backflow device can flow from the first pipe segment to the second pipe segment.

[0045] An embodiment of the present application further provides a gas-water valve, which comprises a valve body 10, an air inlet channel 11 and an air outlet channel 12 are arranged on the valve body 10 and can be communicated, the air inlet channel 11 is used for being communicated with a gas cylinder, the air outlet channel 12 is used for being communicated with an insertion pipe, and an anti-backflow assembly is arranged in the air outlet channel 12.

[0046] In combination with FIG. 1 and FIG. 5, in some embodiments, a recess structure 111 is arranged in one of the connecting portion 13 and the fixing portion 110, and a protruding structure is arranged on the other one, and the recess structure 111 cooperates with the protruding structure. Specifically, in FIG. 1, the protruding structure is arranged on the connecting portion 13, and the recess structure 111 is arranged on the fixing portion 110. The recess structure 111 cooperates with the protruding structure, and at the same time, the abutting portion 213 abuts against the fixing portion 110, so as to fix the anti-backflow device 100 in the air outlet channel.

[0047] The embodiment of the present application also provides an endoscope, characterized by comprising an operation handle and an insertion tube, and a gas-water valve is arranged on the operation handle, and a gas outlet channel 12 of the gas-water valve is communicated with the insertion tube.

[0048] The technical features of the above embodiments can be combined in any manner, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist in contradiction, they should be considered as the scope of the present application.

[0049] The above embodiments only express several implementation manners of the present application, the description is relatively specific and detailed, but it should not be understood as a limitation on the patent application scope. It should be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A counterflow assembly, characterized in that, The reverse flow assembly comprises an anti-reverse flow member, the anti-reverse flow member comprises a fixed part and an elastically deformable part arranged on the periphery of the fixed part, the fixed part is used for cooperating with a connecting part in a gas outlet channel of a gas-water valve, and the diameter of the elastically deformable part gradually increases along the positive direction of the gas flow in the gas outlet channel until abutting against the inner wall of the gas outlet channel; When the gas outlet channel has a positive direction gas flow, the positive direction gas flow extrudes the outer periphery of the elastically deformable part, the outer periphery shrinks inwardly, and the positive direction gas flow passes between the elastically deformable part and the inner wall of the gas outlet channel; when the gas outlet channel has a reverse direction gas flow, the reverse direction gas flow extrudes the outer periphery of the elastically deformable part, the outer periphery expands outwardly, and the reverse direction gas flow is hindered to pass.

2. The counterflow assembly of claim 1, wherein, Along the axial direction of the elastically deformable part, the elastically deformable part has a closed end and an open end, the diameter of the closed end is smaller than the diameter of the open end, and the fixed part is arranged on the inner periphery of the elastically deformable part to form the closed end.

3. The counterflow assembly of claim 2, wherein, The fixed part extends from the closed end to the open end, and a rib is arranged between the fixed part and the inner wall of the elastically deformable part, and the rib is lower than the open end along the axial direction of the elastically deformable part.

4. The counterflow assembly of claim 1, wherein, The reverse flow assembly further comprises a gas tube joint, the gas tube joint comprises a tube body and an abutting part arranged on one end of the tube body, the abutting part abuts against the fixed part, and the tube body is arranged in a spaced manner with the elastically deformable part.

5. The counterflow assembly of claim 4, wherein, The abutting part protrudes outwardly from the tube body.

6. The counterflow assembly of claim 4, wherein, The tube body comprises a first tube segment and a second tube segment in communication with each other, the inner diameter of the first tube segment is greater than the inner diameter of the second tube segment, a cross beam is arranged in the first tube segment, and the abutting part is fixed at the center of the first tube segment through the cross beam.

7. The counterflow assembly of claim 6, wherein, The width of the cross beam is smaller than the inner hole diameter of the second tube segment close to one end of the first tube segment.

8. An air and water valve characterized by The valve body is provided with an air inlet channel and an air outlet channel in communication, the air inlet channel is used for communicating with a gas cylinder, the air outlet channel is used for communicating with an insertion tube, and the reverse flow assembly according to any one of claims 1-7 is arranged in the air outlet channel.

9. The air and water valve of claim 8, wherein, One of the connecting part and the fixed part is provided with a recess structure, and the other is provided with a protruding structure, and the recess structure cooperates with the protruding structure.

10. An endoscope characterized by comprising: The gas-water valve of the endoscope according to claim 8 or 9 is arranged on the operation handle, and the air outlet channel of the gas-water valve communicates with the insertion tube.

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