Endoscope, gas-water valve and countercurrent assembly

Abstract

The utility model 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-water valves, and countercurrent components. Background Art

[0002] An endoscope is an insertion tube equipped with a light and a camera. It can be inserted into the stomach through the mouth or other natural orifices. During an endoscopic examination, air is injected into the patient's digestive tract through the endoscope's insertion tube to facilitate insertion of the tube. Furthermore, because fluids from the patient's body can adhere to the surface of the camera lens, there is a high possibility of obstructing the lens and affecting the doctor's surgery. Therefore, the endoscope needs to be frequently pressed to flush and clean the lens during use. Therefore, the handle of the endoscope is equipped with an air and water valve to control the opening and closing of the water and air channels 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. Utility Model Content

[0004] Based on this, it is necessary to provide an endoscope, a gas-water valve and a counterflow 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 assembly includes a backflow prevention member, the backflow prevention member including a fixed portion and an elastic deformation portion disposed around the fixed portion. The fixed portion is configured to cooperate with a connecting portion within an air outlet channel of an air-water valve. Along the positive direction of airflow 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 positive airflow, the positive airflow squeezes the outer periphery of the elastic deformation portion, causing the outer periphery to contract inward, allowing the positive airflow to pass between the elastic deformation portion and the inner wall of the air outlet channel. When the air outlet channel has negative airflow, the negative airflow squeezes the outer periphery of the elastic deformation portion, causing the outer periphery to expand outward, thereby obstructing the passage of the negative airflow.

[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 periphery 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. 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 fixed portion, and the tube body and the elastic deformation portion are spaced apart.

[0009] In one embodiment, the abutting 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 crossbeam is provided in the first tube segment, and the abutment portion is fixed to the center of the first tube segment through the crossbeam.

[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. 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. A countercurrent component is provided 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 portion, 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 endoscope, air-water valve, and backflow assembly described above, the backflow prevention component cooperates with the connecting portion in the air outlet channel via a fixing portion to secure the backflow prevention component. When gas flows from the air inlet channel through the inner cavity of the air-water valve to the air outlet channel, the diameter of the elastic deformation portion increases sequentially due to the flow direction of the positive airflow along the air outlet channel. That is, the elastic deformation portion guides the airflow to the outer periphery of the elastic deformation portion to squeeze the outer periphery, causing the outer periphery to shrink inward, thereby forming a gap between the outer periphery and the inner wall of the air outlet channel. The positive airflow flows from the gap through the air outlet channel into 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 portion from the other side of the elastic deformation portion. At this time, the outer periphery expands outward and further connects tightly with the inner wall of the air outlet channel, thereby blocking the reverse airflow from passing through, that is, preventing the gas cylinder from being contaminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the cross-sectional structure of the air-water valve in one embodiment.

[0017] Figure 2Schematic diagram of the structure of the backflow prevention component in one embodiment.

[0018] Figure 3 Schematic diagram of the structure of the trachea joint in one embodiment.

[0019] Figure 4 Schematic diagram of the cross-sectional structure of a countercurrent component in one embodiment.

[0020] Figure 5 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 part; 20, valve core; 100, backflow prevention member; 110, fixing part; 111, recessed structure; 120, elastic deformation part; 121, closed end; 122, open end; 123, rib; 200, trachea joint; 210, pipe body; 211, first pipe section; 212, second pipe section; 213, abutting part; 214, crossbeam. DETAILED DESCRIPTION

[0022] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0023] In the description of this 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 this 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 this application.

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

[0025] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0026] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this 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. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower 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 an intermediate 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 an intermediate element. 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 embodiment.

[0028] Combine 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. 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. 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] Combine Figure 1 and Figure 2One embodiment of the present application discloses a backflow assembly, which includes a backflow prevention member 100. The backflow prevention member 100 includes a fixed portion 110 and an elastic deformation portion 120 arranged around the fixed portion 110. The fixed portion 110 is used to cooperate with the connecting portion 13 in the air outlet channel 12 of the air and water valve. 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 to facilitate the positive airflow to pass 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 is secured to the outlet passage 12 by means of a fixing portion 110 that cooperates with a connecting portion 13 within the outlet passage 12. When gas flows from the inlet passage 11 through the inner cavity of the gas-water valve to the outlet passage 12, the diameter of the elastic deformation portion 120 increases in accordance with the direction of the positive airflow in the outlet passage 12. This means that the elastic deformation portion 120 guides the airflow to the outer periphery of the elastic deformation portion 120, squeezing the outer periphery, causing the outer periphery to contract inwardly, thereby creating a gap between the outer periphery and the inner wall of the outlet passage 12. The positive airflow flows through the gap through the outlet passage 12 into the insertion tube. When gas or liquid within the patient's body flows from the insertion tube into the outlet passage 12, the gas or liquid squeezes the elastic deformation portion 120 from the other side. At this point, the outer periphery expands outward, further tightly connecting to the inner wall of the outlet passage 12, thereby obstructing the passage of reverse airflow and preventing contamination of the gas cylinder.

[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 periphery of the elastic deformation 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. That is, the elastically deformable portion 120 has a trumpet-shaped structure. Under the guidance and deformation of the outer wall of the elastically deformable portion 120, positive airflow creates a gap between the outer periphery of the elastically deformable portion 120 and the air outlet channel 12, allowing the positive airflow to pass through the gap. When negative airflow strikes the elastically deformable portion 120 from the open end 122, the open end 122 is caused to expand outward, further causing the outer periphery of the elastically deformable portion 120 to abut against the inner wall of the air outlet channel 12, thereby obstructing the passage of negative airflow.

[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 provided between the fixing 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 this embodiment, along the axial direction of the elastic deformation portion 120, the elastic deformation portion 120 includes a support segment and a deformation segment connected in sequence, the diameter of the deformation segment is larger than the diameter of the support segment, the rib 123 is arranged between the support segment and the fixed portion 110, and there is no support between the deformation segment and the fixed portion 110.

[0036] There can be multiple ribs 123, spaced apart along the circumference of the fixed portion 110. Ribs 123 are used to support the support segment inside the elastically deformable portion 120, thereby reducing deformation of the support segment. Ribs 123 are lower than the open end 122, leaving the deformation segment unsupported. This means that when positive airflow strikes, the deformation segment contracts inward, while when negative airflow strikes, the deformation segment expands outward. During installation, the deformation segment abuts the inner wall of the air outlet passage 12.

[0037] In some embodiments, combined Figure 3 and Figure 4 The counterflow assembly further includes a tracheal connector 200 , which includes a tube body 210 and an abutting portion 213 disposed at one end of the tube body 210 , the abutting 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, the 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 trachea connector 200 and the anti-backflow component 100 are spaced apart. 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 trachea connector 200 and the anti-backflow component 100.

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

[0040] In this embodiment, the abutting 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 abutting 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 backflow prevention component 100 can flow out of the tube body 210.

[0041] In other embodiments, the fixing portion extends beyond the open 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 the abutting portion so that the tube body and the elastic deformation portion are spaced apart, thereby facilitating 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 backflow prevention device 100 can flow from the first tube segment 211 to the second tube segment 212.

[0043] In some embodiments, the width of the crossbeam 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 an air inlet channel 11 and an air outlet channel 12 that can be connected are opened. 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 provided in the air outlet channel 12.

[0046] Combine Figure 1 and Figure 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. Figure 1 In the example, the connecting portion 13 is provided with a protruding structure, and the fixing portion 110 is provided with a recessed structure 111. 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, which is characterized in that it includes an operating handle and an insertion tube, wherein an air-water valve is provided 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-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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 merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A countercurrent component, characterized in that: The backflow assembly includes a backflow prevention member, which includes a fixed portion and an elastic deformation portion provided 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. Along the positive direction of the air flow in the air outlet channel, the diameter of the elastic deformation portion increases gradually 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 counter-flow 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 counter-flow 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. Along the axial direction of the elastic deformation portion, the rib is lower than the open end.

4. The counter-flow assembly according to claim 1, characterized in that The counter-flow component further comprises an air pipe joint, which comprises a tube body and an abutting portion provided at one end of the tube body, wherein the abutting portion abuts against the fixing portion, and the tube body and the elastic deformation portion are spaced apart.

5. The counter-flow 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 pipe body includes a first pipe section and a second pipe section that are interconnected. The inner diameter of the first pipe section is larger than the inner diameter of the second pipe section. A crossbeam is provided in the first pipe section, and the abutment portion is fixed to the center of the first pipe section through the crossbeam.

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 an air inlet channel and an air outlet channel that can be connected are opened, the air inlet channel is used to be connected with the gas cylinder, the air outlet channel is used to be connected with the insertion tube, and the countercurrent component according to any one of claims 1-7 is arranged in the air outlet channel.

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.

Images