Endoscope, gas-water valve and countercurrent assembly

Abstract

The invention relates to an endoscope, a gas-water valve and a countercurrent assembly. The countercurrent assembly comprises an anti-countercurrent piece, the anti-countercurrent piece comprises a fixing part and an elastic deformation part arranged on the peripheral side of the fixing part, the fixing part is used for being matched with a connecting part in an air outlet channel of the air-water valve, and the diameter of the elastic deformation part is sequentially increased in the flowing direction of forward airflow of the air outlet channel till the elastic deformation part abuts against the inner wall of the air outlet channel. When the air outlet channel has positive airflow, the positive airflow extrudes the periphery of the elastic deformation part, and the periphery shrinks inwards, so that the positive airflow passes through the space between the elastic deformation part and the inner wall of the air outlet channel; when the air outlet channel has reverse airflow, the reverse airflow extrudes the periphery of the elastic deformation part, and the periphery expands outwards to prevent the reverse airflow from passing through. On the basis of ensuring normal circulation of airflow in the positive direction, the gas cylinder can be prevented from being polluted.

Description

Technical Field

[0001] The present application relates to the technical field of endoscopes, and in particular to endoscopes, air and water valves, and countercurrent components. Background Art

[0002] An endoscope is an insertion tube equipped with a light and a camera. It can enter the stomach through the mouth or other natural orifices. During endoscopic examination, air needs to be injected into the patient's digestive tract through the insertion tube of the endoscope to facilitate the insertion of the insertion tube. At the same time, since the patient's body fluids will adhere to the surface of the camera lens, there is a great possibility that the lens will be blocked, affecting the doctor's operation. Therefore, when using the endoscope, it is necessary to press frequently to flush and clean the lens. Therefore, an air and water valve is equipped 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 gas 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 of the invention

[0004] Based on this, it is necessary to provide an endoscope, a gas-water valve and a backflow component to address the problem that the gas or liquid in the patient's body can easily flow back into the gas cylinder.

[0005] A backflow component, the backflow component includes a backflow prevention part, the backflow prevention part includes a fixed part and an elastic deformation part arranged on the periphery of the fixed part, the fixed part is used to cooperate with the connecting part in the air outlet channel of the air and water valve, along the positive direction of the airflow of the air outlet channel, the diameter of the elastic deformation part increases successively until it abuts against the inner wall of the air outlet channel. When the air outlet channel has a positive airflow, the positive airflow squeezes the outer periphery of the elastic deformation part, the outer periphery shrinks inward, and the positive airflow passes between the elastic deformation part and the inner wall of the air outlet channel; when the air outlet channel has a reverse airflow, the reverse airflow squeezes the outer periphery of the elastic deformation part, the outer periphery expands outward, and hinders the reverse airflow from passing.

[0006] In one embodiment, along the axial direction of the elastic deformation portion, the elastic deformation 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 fixing portion is arranged on the inner circumference of the elastic deformation portion to form the closed end.

[0007] In one embodiment, the fixing portion extends from the closed end to the open end, and a rib is provided between the fixing portion and an inner wall of the elastic deformation portion, and along the axial direction of the elastic deformation portion, the rib is lower than the open end.

[0008] In one embodiment, the counterflow component further includes an air pipe joint, which includes a tube body and an abutment portion arranged at one end of the tube body, the abutment portion abuts against the fixing portion, and the tube body and the elastic deformation portion are spaced apart.

[0009] In one embodiment, the abutment portion protrudes out of the tube body.

[0010] In one embodiment, the tube body includes a first tube segment and a second tube segment that are interconnected, the inner diameter of the first tube segment is larger than the inner diameter of the second tube segment, a cross beam is provided in the first tube segment, and the abutment portion is fixed at the center of the first tube segment through the cross beam.

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

[0012] A gas-water valve comprises a valve body, wherein the valve body is provided with an air inlet channel and an air outlet channel which can be communicated with each other, wherein the air inlet channel is used to communicate with a gas cylinder, and the air outlet channel is used to communicate with an insertion tube, and a countercurrent component is arranged in the air outlet channel.

[0013] In one embodiment, a recessed structure is provided in one of the connecting portion and the fixing portion, and a protruding structure is provided on the other, and the recessed structure cooperates with the protruding structure.

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

[0015] In the above-mentioned endoscope, air-water valve and backflow assembly, the backflow prevention part cooperates with the connecting part in the air outlet channel through the fixing part to achieve the fixation of the backflow prevention part. When the gas flows from the air inlet channel to the air outlet channel through the inner cavity of the air-water valve, due to the flow direction of the positive airflow along the air outlet channel, the diameter of the elastic deformation part increases successively, that is, the elastic deformation part guides the airflow to the outer periphery of the elastic deformation part to squeeze the outer periphery, so that the outer periphery shrinks inward, so that there is a gap between the inner wall of the air outlet channel, and the positive airflow flows from the gap through the air outlet channel to the insertion tube. When the gas or liquid in the patient's body flows from the insertion tube to the air outlet channel, the gas or liquid squeezes the elastic deformation part from the other side of the elastic deformation part. At this time, the outer periphery expands outward and is further tightly connected with the inner wall of the air outlet channel, thereby being able to hinder the reverse airflow from passing through, that is, being able to prevent the gas cylinder from being contaminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic cross-sectional view of a gas-water valve in one embodiment.

[0017] FIG. 2 is a schematic diagram of the structure of a backflow prevention member in an embodiment.

[0018] FIG. 3 is a schematic structural diagram of a tracheal joint in one embodiment.

[0019] FIG. 4 is a schematic cross-sectional view of a countercurrent component in one embodiment.

[0020] FIG. 5 is a schematic diagram of the cross-sectional structure of a valve body in one embodiment.

[0021] Figure numerals: 10, valve body; 11, air inlet channel; 12, air outlet channel; 13, connecting portion; 20, valve core; 100, backflow prevention member; 110, fixing portion; 111, recessed structure; 120, elastic deformation portion; 121, closed end; 122, open end; 123, rib; 200, air pipe joint; 210, pipe body; 211, first pipe section; 212, second pipe section; 213, abutting portion; 214, crossbeam. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0023] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0024] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0025] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0026] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0027] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0028] In conjunction with Figure 1, the valve body 10 is provided with an air inlet channel 11 and an air outlet channel 12. When the valve core 20 moves up and down in the valve body 10, the air inlet channel 11 and the air outlet channel 12 can be connected or disconnected. Among them, the air inlet channel 11 is connected to the gas cylinder, and the air outlet channel 12 is connected to the insertion tube. When the air inlet channel 11 and the air outlet channel 12 are connected, the gas in the gas cylinder can flow into the insertion tube through the air inlet channel 11, the inner cavity of the valve body 10, and the air outlet channel 12 in sequence, and the gas flow direction at this time is defined as the positive direction. The flow direction of the gas or liquid in the patient's body from the insertion tube to the air outlet channel 12 is the reverse direction.

[0029] In conjunction with FIG. 1 and FIG. 2 , an embodiment of the present application discloses a backflow component, which includes a backflow prevention member 100, and the backflow prevention member 100 includes a fixed portion 110 and an elastic deformation portion 120 arranged on the periphery of the fixed portion 110, and the fixed portion 110 is used to cooperate with the connecting portion 13 in the air outlet channel 12 of the gas-water valve, and along the positive direction of the air flow in the air outlet channel 12, the diameter of the elastic deformation portion 120 increases successively until it abuts against the inner wall of the air outlet channel 12. When the air outlet channel 12 has a positive airflow, the positive airflow squeezes the outer periphery of the elastic deformation portion 120, and the outer periphery shrinks inwardly, so that the positive airflow passes between the elastic deformation portion 120 and the inner wall of the air outlet channel 12; when the air outlet channel 12 has a reverse airflow, the reverse airflow squeezes the outer periphery of the elastic deformation portion 120, and the outer periphery expands outwardly to prevent the reverse airflow from passing.

[0030] In this embodiment, the backflow prevention member 100 cooperates with the connecting portion 13 in the outlet channel 12 through the fixing portion 110 to fix the backflow prevention member 100. When the gas flows from the inlet channel 11 to the outlet channel 12 through the inner cavity of the gas-water valve, the diameter of the elastic deformation portion 120 increases successively due to the flow direction of the positive airflow along the outlet channel 12, that is, the elastic deformation portion 120 guides the airflow to the outer periphery of the elastic deformation portion 120 to squeeze the outer periphery, so that the outer periphery shrinks inward, so that there is a gap between the inner wall of the outlet channel 12, and the positive airflow flows from the gap through the outlet channel 12 to the insertion tube. When the gas or liquid in the patient's body flows from the insertion tube to the outlet channel 12, the gas or liquid squeezes the elastic deformation portion 120 from the other side of the elastic deformation portion 120. At this time, the outer periphery expands outward and is further tightly connected with the inner wall of the outlet channel 12, thereby being able to block the reverse airflow from passing through, that is, being able to prevent the gas cylinder from being contaminated.

[0031] In some embodiments, along the axial direction of the elastic deformation portion 120 , the elastic deformation 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 fixing portion 110 is arranged on the inner circumference of the elastic deformation portion 120 to form the closed end 121 .

[0032] In some embodiments, along the axial direction of the elastic deformation part 120, the diameter of the closed end 121 is smaller than the diameter of the open end 122, that is, the elastic deformation part 120 is a trumpet-shaped structure, and the positive airflow is guided and deformed by the outer wall of the elastic deformation part 120, so that there is a gap between the outer periphery of the elastic deformation part 120 and the air outlet channel 12, and the positive airflow passes through the gap. When the reverse airflow impacts the elastic deformation part 120 from the open end 122, the open end 122 can be expanded outward, and the outer periphery of the elastic deformation part 120 is further abutted against the inner wall of the air outlet channel 12 to prevent the reverse airflow from passing.

[0033] In some other embodiments, a trigger mechanism is provided on the outer wall of the elastic deformation part, and a support structure is provided on the inner side of the elastic deformation part. When the positive direction airflow triggers the trigger mechanism, the support structure drives the elastic deformation part to contract inward, so that the positive direction airflow can pass through the outer periphery of the elastic deformation part.

[0034] In some embodiments, the fixing portion 110 extends from the closed end 121 to the open end 122 , and a rib 123 is disposed between the fixing portion 110 and an 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 this embodiment, along the axial direction of the elastic deformation portion 120, the elastic deformation portion 120 includes a supporting segment and a deformation segment connected in sequence, the diameter of the deformation segment is larger than the diameter of the supporting segment, the rib 123 is arranged between the supporting segment and the fixed portion 110, and there is no support between the deformation segment and the fixed portion 110.

[0036] The number of ribs 123 can be multiple, and multiple ribs 123 are arranged at intervals along the circumference of the fixing portion 110. The ribs 123 are used to support the support section on the inner side of the elastic deformation portion 120 to reduce the deformation of the support section. The ribs 123 are lower than the opening end 122, so that the deformation section is unsupported, that is, when the positive airflow impacts, the deformation section can shrink inward, and when the reverse airflow impacts, the deformation section can expand outward. During installation, the deformation section can be abutted against the inner wall of the air outlet channel 12.

[0037] In some embodiments, in combination with Figures 3 and 4, the counterflow assembly also includes a trachea connector 200, which includes a tube body 210 and an abutment portion 213 arranged at one end of the tube body 210, and the abutment portion 213 abuts against the fixing portion 110 so that the tube body 210 and the elastic deformation portion 120 are spaced apart.

[0038] In this embodiment, one end of the tube body 210 away from the abutment portion 213 is used to communicate with the insertion tube, and the abutment portion 213 abuts against the fixing portion 110, so that the tracheal connector 200 and the anti-backflow component 100 are spaced apart, and after the positive direction airflow passes through the outer periphery of the anti-backflow component 100, it can flow into the tube body 210 from the gap between the tracheal connector 200 and the anti-backflow component 100.

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

[0040] In this embodiment, the abutment portion 213 protrudes from the outside of the tube body 210, and the fixed portion 110 is located inside the elastic deformation portion 120 or the side surface of the fixed portion 110 close to the trachea connector 200 is flush with the elastic deformation portion 120. At this time, when the abutment portion 213 abuts against the fixed portion 110, the tube body 210 and the elastic deformation portion 120 can be spaced apart, so that the positive direction airflow flowing out of the anti-backflow component 100 can flow out of the tube body 210.

[0041] In some other embodiments, the fixing portion extends beyond the opening end, the abutting portion is flush with one end of the tube body or is located inside the tube body, and the fixing portion abuts against the abutting portion so that the tube body and the elastic deformation portion are spaced apart to facilitate the positive direction airflow flowing out of the backflow prevention component to flow out of the tube body.

[0042] In some embodiments, the tube body 210 includes a first tube segment 211 and a second tube segment 212 that are interconnected, the inner diameter of the first tube segment 211 is larger than the inner diameter of the second tube segment 212, a cross beam 214 is provided in the first tube segment 211, and the abutment portion 213 is fixed to the center of the first tube segment 211 through the cross beam 214, so that the positive direction airflow flowing out of the anti-backflow device 100 can flow from the first tube segment 211 to the second tube segment 212.

[0043] In some embodiments, the width of the cross beam 214 is smaller than the inner diameter of the second pipe segment 212 at one end close to the first pipe segment 211 , so as to enable airflow to 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 second pipe segment near one end of the first pipe segment, and the crossbeam and the second pipe segment near one end of the first pipe segment are spaced apart, so that the positive direction airflow flowing out of the backflow prevention component can flow from the first pipe segment to the second pipe segment.

[0045] An embodiment of the present application also provides an air-water valve, including a valve body 10, on which is opened an air inlet channel 11 and an air outlet channel 12 that can be connected. The air inlet channel 11 is used to connect with the gas cylinder, and the air outlet channel 12 is used to connect with the insertion tube. A countercurrent component is arranged in the air outlet channel 12.

[0046] In conjunction with FIG. 1 and FIG. 5 , in some embodiments, a recessed structure 111 is provided in one of the connecting portion 13 and the fixing portion 110, and a protruding structure is provided on the other, and the recessed structure 111 cooperates with the protruding structure. Specifically, FIG. 1 takes the example of a protruding structure provided on the connecting portion 13 and a recessed structure 111 provided on the fixing portion 110. The recessed structure 111 cooperates with the protruding structure, and the abutting portion 213 abuts against the fixing portion 110, so as to fix the backflow prevention member 100 in the air outlet channel.

[0047] An embodiment of the present application further provides an endoscope, characterized in that it includes an operating handle and an insertion tube, an air-water valve is arranged on the operating handle, and an air outlet channel 12 of the air-water valve is connected to the insertion tube.

[0048] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations 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 protection scope of the patent application shall be subject to the attached claims.

Claims

1. A countercurrent component, characterized in that: The backflow assembly includes a backflow prevention member, the backflow prevention member includes a fixed portion and an elastic deformation portion arranged around the fixed portion, the fixed portion is used to cooperate with the connecting portion in the air outlet channel of the air-water valve, and along the positive direction of the air flow in the air outlet channel, the diameter of the elastic deformation portion increases sequentially until it abuts against the inner wall of the air outlet channel; When the air outlet channel has a positive airflow, the positive airflow squeezes the outer periphery of the elastic deformation part, the outer periphery shrinks inward, and the positive airflow passes between the elastic deformation part and the inner wall of the air outlet channel; when the air outlet channel has a reverse airflow, the reverse airflow squeezes the outer periphery of the elastic deformation part, the outer periphery expands outward, and hinders the passage of the reverse airflow.

2. The countercurrent assembly according to claim 1, characterized in that Along the axial direction of the elastic deformation portion, the elastic deformation 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 fixing portion is arranged on the inner periphery of the elastic deformation portion to form the closed end.

3. The countercurrent assembly according to claim 2, characterized in that: The fixing portion extends from the closed end to the open end, a rib is provided between the fixing portion and an inner wall of the elastic deformation portion, and along the axial direction of the elastic deformation portion, the rib is lower than the open end.

4. The countercurrent assembly according to claim 1, characterized in that The counterflow component further comprises an air pipe joint, which comprises a tube body and an abutment portion arranged at one end of the tube body, the abutment portion abuts against the fixing portion, and the tube body is spaced apart from the elastic deformation portion.

5. The countercurrent assembly according to claim 4, characterized in that The abutting portion protrudes out of the tube body.

6. The counter-flow assembly according to claim 4, characterized in that: The tube body comprises a first tube section and a second tube section which are connected to each other, the inner diameter of the first tube section is larger than the inner diameter of the second tube section, a cross beam is arranged in the first tube section, and the abutting portion is fixed at the center of the first tube section through the cross beam.

7. The counter-flow assembly according to claim 6, characterized in that: The width of the crossbeam is smaller than the diameter of the inner hole of the second pipe section close to one end of the first pipe section.

8. A gas-water valve, characterized in that: It comprises a valve body, on which is provided an air inlet channel and an air outlet channel which can be connected, wherein the air inlet channel is used to be connected with a gas cylinder, and the air outlet channel is used to be connected with an insertion tube, and the air outlet channel is provided with a countercurrent component according to any one of claims 1 to 7.

9. The gas-water valve according to claim 8, characterized in that: A recessed structure is provided in one of the connecting portion and the fixing portion, and a protruding structure is provided on the other portion, wherein the recessed structure cooperates with the protruding structure.

10. An endoscope, characterized in that: The endoscope comprises an operating handle and an insertion tube, wherein the air-water valve of the endoscope according to claim 8 or 9 is arranged on the operating handle, and the air outlet channel of the air-water valve is connected to the insertion tube.

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