CN220898651U - Negative pressure valve and endoscope - Google Patents

Abstract

The utility model provides a negative pressure valve and an endoscope, and belongs to the technical field of endoscopes. The negative pressure valve comprises a valve body, a fixed part, a first movable part and a second movable part, wherein a first channel, a second channel and a third channel which are communicated with each other are arranged in the valve body, and the first channel and the second channel are adjacently arranged; the fixing piece comprises a separation plate positioned between the first channel and the second channel; the first movable piece and the second movable piece are both accommodated in the third channel and can slide in the third channel so as to block or communicate the first channel and the third channel and the second channel and the third channel respectively; the partition plate is provided with a guide hole, and part of the first movable piece or part of the second movable piece can pass through the guide hole to be abutted with the second movable piece or the first movable piece. According to the negative pressure valve, the first movable part is slid, so that the first channel and the third channel are directly communicated or closed, the trafficability of the negative pressure valve is improved, and the cleaning speed of accumulated liquid is further improved.

Description

Negative pressure valve and endoscope

Technical Field

The utility model relates to a negative pressure valve and an endoscope, and belongs to the technical field of endoscopes.

Background

Endoscopes are commonly used in modern medical practice as instruments that can be passed orally into the stomach or through other natural orifices and into the body through surgically created incisions. Through the endoscope, doctors can observe the lesions which cannot be displayed by the X-rays in the human body, and the diagnosis of the follow-up illness state is facilitated.

In the use process of the endoscope, the suction valve is matched with the suction pipe to suck the effusion in the patient so as to eliminate the interference of the effusion in the examination and treatment process and ensure the observation field of view of doctors. In a specific operation, the port of the suction valve is communicated with the suction pump, and a negative pressure channel is formed by operating the suction valve button, so that the accumulated liquid in the patient is sucked out.

The existing suction valve basically generates a gap between the piston and the inner wall of the pipeline by changing the position of the piston, so that the accumulated liquid can flow outwards through the gap to clean the accumulated liquid in the patient, but when the accumulated liquid contains particles (resected pathological tissues or other sundries), the particles cannot pass through the gap, so that the suction valve is blocked, the service life of the suction valve is reduced, and meanwhile, the accumulated liquid in the patient cannot be quickly cleaned due to smaller gap, so that the operation progress, namely the operation effect, is influenced.

In view of this, there is a clear need for improvements to negative pressure valves to address the above-described problems.

Disclosure of utility model

The utility model aims to provide a negative pressure valve and an endoscope, which are used for solving the problems that a suction valve is easy to block and the cleaning efficiency is low in the prior art.

To achieve the above object, the present utility model provides a negative pressure valve, comprising:

The valve body is internally provided with a first channel, a second channel and a third channel which are communicated with each other, and the first channel and the second channel are adjacently arranged in the extending direction of the third channel;

The fixing piece comprises a separation plate, wherein the separation plate is accommodated in the third channel and is positioned between the first channel and the second channel;

The first movable piece is accommodated in the third channel and can slide in the third channel so as to block or communicate the first channel and the third channel;

The second movable piece is accommodated in the third channel and can slide in the third channel so as to block or communicate the second channel and the third channel;

The partition plate is provided with a guide hole, a part of the first movable piece can pass through the guide hole to be abutted with the second movable piece, or a part of the second movable piece can pass through the guide hole to be abutted with the first movable piece, so that the first movable piece and the second movable piece synchronously move.

As a further improvement of the present utility model, the first movable member includes a movable portion and a through hole provided in the movable portion, and the third passage can communicate with the first passage through the through hole.

As a further improvement of the present utility model, the first movable member further includes a guide portion fixedly connected to the movable portion, the guide portion passing through the guide hole and abutting against the second movable member.

As a further development of the utility model, the first movable part is in sliding sealing connection with the stationary part.

As a further improvement of the utility model, the negative pressure valve comprises an elastic member, the valve body comprises an abutting part arranged in the third channel, one end of the elastic member abuts against the abutting part, and the other end abuts against one end of the first movable member far away from the fixed member.

As a further development of the utility model, the second movable part is provided with a fourth channel through which the second channel can communicate with the outside.

As a further improvement of the utility model, the negative pressure valve comprises an end cover covered at the tail end of the valve body, a first air hole is arranged on the end cover, and a second air hole which is communicated with the fourth channel and corresponds to the first air hole is arranged on the second movable piece.

As a further improvement of the present utility model, the fixing member includes a main body fixedly connected to the partition plate, a sliding channel and a third air hole are provided on the main body, the third air hole corresponds to the second channel to communicate the sliding channel with the second channel, and the second movable member is accommodated in the sliding channel and can slide in the sliding channel to block or communicate the fourth channel with the third air hole.

As a further improvement of the utility model, the negative pressure valve further comprises a sealing element, wherein a first sealing groove is arranged on the outer wall surface of the first movable element, and the sealing element is partially accommodated in the first sealing groove so as to be in sealing connection with the first movable element and the valve body; the outer wall surface of the second movable piece is provided with a second sealing groove, and the sealing piece is partially accommodated in the second sealing groove so as to be in sealing connection with the second movable piece and the valve body.

In order to achieve the above object, the utility model provides an endoscope, which comprises an operation piece, a suction tube and a negative pressure valve, wherein the negative pressure valve and the suction tube are connected with the operation piece, and the negative pressure valve is communicated with the suction tube.

The beneficial effects of the utility model are as follows: according to the negative pressure valve, the first channel and the third channel which are mutually communicated are arranged, the first movable part which can slide in the third channel is arranged, and the first movable part slides, so that the first channel and the third channel are directly communicated or closed, the trafficability of the negative pressure valve is enhanced, the negative pressure valve is prevented from being blocked, and the cleaning speed of accumulated liquid is further improved.

Drawings

Fig. 1 is a schematic perspective view of an endoscope of a preferred embodiment of the present utility model.

Fig. 2 is a schematic perspective view of the negative pressure valve of fig. 1.

Fig. 3 is a cross-sectional view of the negative pressure valve of fig. 2.

Fig. 4 is a partial enlarged view of a portion a in fig. 3.

Fig. 5 is a cross-sectional view of the valve body of fig. 2.

Fig. 6 is an exploded view of the negative pressure valve of fig. 2.

Fig. 7 is a perspective view of the first movable member of fig. 6.

Fig. 8 is a perspective view of the mount of fig. 6.

Fig. 9 is another angular perspective view of the mount of fig. 8.

Fig. 10 is a perspective view of the second movable member of fig. 6.

Fig. 11 is a schematic perspective view of the end cap of fig. 6.

Reference numerals illustrate: endoscope 100, negative pressure valve 200, suction tube 300, connector 400, and manipulator 500; the valve body 1, the first passage 11, the second passage 12, the third passage 13, the first portion 131, the second portion 132, the abutment 14, the step 15; a fixing member 2, a partition plate 21, a guide hole 22, a main body 23, a third air hole 231, a sliding passage 232, and a connecting portion 233; the first movable member 3, the movable portion 31, the through hole 311, the first seal groove 312, the guide portion 32; the second movable piece 4 is abutted against the end 41, the boss 411, the fourth channel 42, the second air hole 43, the second sealing groove 44, the end cover 5, the first air hole 51, the abutting piece 52 and the accommodating cavity 53; an elastic member 6, a sealing member 7.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 and 2, an endoscope 100 is disclosed. Illustratively, the endoscope 100 may be passed orally into the stomach or into the body through other natural orifices to observe lesions in the body that are not visible by X-rays, while allowing for the removal of fluid products from the body.

The endoscope 100 includes an operation member 500, a connection member 400, a suction tube 300, a negative pressure valve 200, and the like. Wherein, the negative pressure valve 200 and the suction tube 300 are both connected with the operation member 500, and the negative pressure valve 200 is communicated with the suction tube 300. Specifically, the two ends of the connecting member 400 are respectively connected to the operating member 500 and the suction tube 300, and the operating member 500 can control the end of the suction tube 300 to bend and rotate so as to view different directions in the body. The connector 400 is used for grasping by an operator to improve the stability of the endoscope 100 in use. The negative pressure valve 200 is disposed at an end of the operation member 500 remote from the suction tube 300 and fixedly connected to the operation member 500. When cleaning the effusion in the patient, one end of the negative pressure valve 200 is connected with an absorption pump, and the absorption pump generates suction force to absorb air or liquid in the negative pressure valve 200 and the suction pipe 300, and further to extract the effusion in the patient.

Because the specific structure of the operation member 500, the specific structure of the connection member 400, the specific structure of the suction tube 300, and the connection relationship among the operation member 500, the connection member 400, and the suction tube 300 can be designed according to the conventional art, they will not be described in detail herein. The main improvement of the present application is the negative pressure valve 200, so the specific structure of the negative pressure valve 200 will be described in detail in the following description.

Referring to fig. 2 to 6, the negative pressure valve 200 includes a valve body 1, a fixed member 2, a first movable member 3 and a second movable member 4, wherein a first channel 11, a second channel 12 and a third channel 13 are disposed in the valve body 1, and the first channel 11 and the second channel 12 are disposed adjacent to each other in an extending direction of the third channel 13. The fixing member 2 includes a partition plate 21, and the partition plate 21 is accommodated in the third passage 13 and located between the first passage 11 and the second passage 12. The first movable member 3 is accommodated in the third channel 13 and can slide in the third channel 13 to block or communicate the first channel 11 and the third channel 13. The second movable member 4 is accommodated in the third channel 13 and is capable of sliding in the third channel 13 to block or communicate the second channel 12 and the third channel 13. The partition plate 21 is provided with a guide hole 22, and a part of the first movable member 3 can be abutted against the second movable member 4 through the guide hole 22, or a part of the second movable member 4 can be abutted against the first movable member 3 through the guide hole 22, so that the first movable member 3 and the second movable member 4 move synchronously.

Specifically, the setting direction of the valve body 1 is the length direction of the endoscope 100, the third channel 13 is arranged at the central axis of the valve body 1 and is in a round hole shape, and the first channel 11 and the second channel 12 are also in a round hole shape, that is, the cross sections of the first channel 11, the second channel 12 and the third channel 13 are all round. The line connecting the junction of the first channel 11 and the third channel 13 and the junction of the second channel 12 and the third channel 13 is arranged parallel to the central axis of the third channel 13, and the first channel 11 is arranged between the second channel 12 and the operation member 500. Of course, in other embodiments, the cross sections of the first channel 11, the second channel 12 and the third channel 13 may be square, oval, triangular, irregular, etc., and the connection line between the connection point of the first channel 11 and the third channel 13 and the connection point of the second channel 12 and the third channel 13 may be disposed at an acute angle with the central axis of the third channel 13, that is, the first channel 11 and the second channel 12 are disposed in a staggered manner, which is not limited herein.

In this embodiment, the second channel 12 is perpendicular to the third channel 13, the first channel 11 is obliquely disposed, and two ends of the first channel 11 are respectively connected with the second channel 12 and the third channel 13, however, in other embodiments, the second channel 12 may be disposed at other angles with the third channel 13, and the first channel 11 may also be disposed at a right angle, i.e. two ends of the first channel 11 are respectively perpendicular to the second channel 12 and the third channel 13, so long as the purpose that the first channel 11, the second channel 12 and the third channel 13 are mutually communicated can be achieved, which is not limited herein.

Referring to fig. 5, a step 15 is disposed in the valve body 1, the step 15 is disposed between the first channel 11 and the second channel 12, and one end of the partition plate 21 abuts against the step 15 to divide the third channel 13 into a first portion 131 and a second portion 132. Specifically, the diameter of the partition plate 21 is matched with the diameter of the third channel 13, so that the outer peripheral wall of the partition plate 21 is abutted against the inner side wall of the third channel 13, on one hand, the fixing piece 2 is connected with the valve body 1, the fixing piece 2 is prevented from sliding in the third channel 13 when in use, on the other hand, the third channel 13 is covered and sealed, gas or liquid exchange between the first portion 131 and the second portion 132 is avoided, and the suction efficiency of the negative pressure valve 200 is further improved.

Specifically, the first movable member 3 is accommodated in the first portion 131 and is capable of sliding in the first portion 131 to block or communicate the first channel 11 and the first portion 131, and the first portion 131 is in communication with the absorbent tube, so that the effusion can pass through the suction tube 300 into the first portion 131. The second movable member 4 is received in the second portion 132 and is slidable within the second portion 132 to block or communicate the second passage 12 with the second portion 132, the second portion 132 being capable of communicating with ambient air such that ambient air can pass through the second portion 132 into the second passage 12.

Referring to fig. 3, 5 and 7, the first movable member 3 includes a movable portion 31 and a through hole 311 provided in the movable portion 31, and the third passage 13 can communicate with the first passage 11 through the through hole 311. Specifically, the movable portion 31 is cylindrically disposed, the through hole 311 is disposed at a central axis of the movable portion 31, and a cross section of the through hole 311 is also circularly disposed.

In this embodiment, the cross section of the through hole 311 is circular, and the diameter of the through hole 311 is slightly smaller than that of the third channel 13, so as to improve the throughput of the negative pressure valve 200 in unit time during aspiration of the effusion, and further improve the efficiency of the endoscope 100 in aspiration of the effusion.

The first movable member 3 further comprises a guide portion 32 fixedly connected with the movable portion 31, the guide portion 32 penetrates through the guide hole 22 and abuts against the second movable member 4, and the first movable member 3 is in sliding sealing connection with the fixed member 2. Specifically, the guide portion 32 extends from one end of the movable portion 31, which is close to the fixed member 2, toward the fixed member 2, the guide portion 32 is arranged in a circular arc shape, and the radius of the guide portion 32 is the same as that of the movable portion 31, so that the first movable member 3 is convenient to produce and prepare. The guide hole 22 has a shape, size and arrangement position corresponding to the guide portion 32 such that the guide portion 32 can be accommodated in the guide hole 22 and closely fit with the side wall of the guide hole 22 to achieve a sealed connection between the first movable member 3 and the fixed member 2, avoiding the occurrence of a gas or liquid flow between the first portion 131 and the second portion 132.

In this embodiment, the guide hole 22 is directly opened on the partition plate 21, and the guide portion 32 is tightly attached to the side wall of the guide hole 22, so that the sealing connection between the first movable member 3 and the fixed member 2 is realized.

The two opposite guide parts 32 are arranged on the movable part 31, and a large gap is reserved between the two guide parts 32 so as to facilitate the outflow of the accumulated liquid. The guide holes 22 are correspondingly provided with two guide portions 32 and guide holes 22, so that the positioning movement of the first movable member 3 is realized, and the movement stability of the first movable member 3 is improved, however, in other embodiments, the number and the setting positions of the guide portions 32 and the guide holes 22 can be designed according to practical situations, for example, the number of the guide portions 32 and the guide holes 22 is set to one, three, five, etc., and the setting positions can be uniformly set or non-uniformly set, and the setting positions are not limited herein.

Specifically, in the extending direction of the third passage 13, the dimension of the movable portion 31 is not smaller than the cross-sectional dimension of the first passage 11, and the dimension of the guide portion 32 is not smaller than the cross-sectional dimension of the first passage 11, so that the movable portion 31 can completely cover the first passage 11 to improve the sealability of the first passage 11 and the third passage 13, or the first passage 11 can be completely exposed to improve the throughput of the liquid product per unit time.

In this embodiment, the guide portion 32 is disposed on the first movable member 3, and the guide portion 32 can be abutted with the second movable member 4 to realize synchronous movement of the first movable member 3 and the second movable member 4, however, in other embodiments, the guide portion 32 may be disposed on the second movable member 4, and may also be disposed on the first movable member 3 and the second movable member 4, respectively, so long as the purpose of synchronous movement of the first movable member 3 and the second movable member 4 can be realized, which is not limited herein.

Referring to fig. 4, 6 and 7, the negative pressure valve 200 includes a sealing member 7, a first sealing groove 312 is formed on an outer wall surface of the first movable member 3, and a portion of the sealing member 7 is received in the first sealing groove 312 to sealingly connect the first movable member 3 and the valve body 1. Specifically, the first seal groove 312 is formed by recessing inwards from the outer wall surface of the first movable member 3, the first seal groove 312 is annularly arranged and provided with two seal grooves, the two seal grooves are respectively arranged at two ends of the movable portion 31, part of the seal member 7 is contained in the first seal groove 312, the other part of the seal member can be abutted against the inner wall of the third channel 13, and the seal member 7 is extruded by the first movable member 3 and the valve body 1, so that the seal member 7 is deformed to realize sealing connection between the first movable member 3 and the valve body 1. Of course, in other embodiments, the seal 7 and the first seal groove 312 may not be provided, and at this time, the sealing connection between the first movable member 3 and the valve body 1 can be achieved by the close contact between the first movable member 3 and the inner wall surface of the third passage 13, which is not limited herein.

Referring to fig. 3, 4, 8 and 9, the fixing member 2 includes a main body 23 fixedly connected to the partition plate 21, a sliding channel 232 and a third air hole 231 are disposed on the main body 23, and the third air hole 231 corresponds to the second channel 12 to communicate the sliding channel 232 with the second channel 12. The second movable member 4 is accommodated in the sliding passage 232 and is capable of sliding in the sliding passage 232 to block or communicate the fourth passage 42 and the third air hole 231. Specifically, the main body 23 is fixedly connected with the partition plate 21, the third air hole 231 is disposed near the partition plate 21, and the shape and the size of the third air hole 231 are matched with those of the second channel 12, so that external air can pass through the third air hole 231 to enter the second channel 12 through the sliding channel 232, so as to realize air circulation.

The main body 23 is in a cylindrical arrangement so as to be matched with the third channel 13, when the fixing piece 2 is accommodated in the third channel 13, the outer wall surface of the main body 23 is abutted with the inner wall surface of the third channel 13, so that interference fit connection between the fixing piece 2 and the valve body 1 is realized, and the fixing piece 2 cannot slide out of the third channel 13 in a free state. The valve body 1 is further provided with an end portion, the fixing member 2 is accommodated in the end portion and abuts against the end portion, specifically, one end of the main body 23 away from the partition plate 21 is further provided with a connecting portion 233, and the connecting portion 233 protrudes outwards from one end of the main body 23 away from the partition plate 21. When mounting 2 is acceptd in third passageway 13, connecting portion 233 and tip butt to improve the connection stability of mounting 2 and valve body 1, avoid under the effect of external force, mounting 2 stretches into in the third through hole 311 completely, simultaneously, so set up, still be convenient for when negative pressure valve body 1 appears damaging, can convenient dismantlement carry out the part change.

In this embodiment, the fixing member 2 is provided with a main body 23 fixedly connected to the partition plate 21, and a sliding channel 232, a connecting portion 233 and a third air hole 231 are provided on the main body 23, so that the second movable member 4 can slide in the sliding channel 232 to block or communicate the third channel 13 and the second channel 12, however, in other embodiments, the fixing member 2 may be only provided with the partition plate 21, and the second movable member 4 can slide directly in the third channel 13, so that blocking and communication of the second channel 12 can be realized, without limitation herein.

Referring to fig. 3 and 10, the second movable member 4 is provided with a fourth channel 42, the second channel 12 can be communicated with the outside through the fourth channel 42, the negative pressure valve 200 includes an end cover 5 covering the end of the valve body 1, a first air hole 51 is provided on the end cover 5, a second air hole 43 corresponding to the first air hole 51 and communicated with the fourth channel 42 is provided on the second movable member 4, and the second movable member 4 is accommodated in the sliding channel 232 and can move in the sliding channel 232 to block or communicate the fourth channel 42 and the third air hole 231. When the fourth channel 42 is communicated with the third air hole 231, external air can sequentially pass through the first air hole 51, the second air hole 43, the fourth channel 42 and the third air hole 231 to enter the second channel 12, so that the external air is communicated with the external air when the absorption pump does not pump accumulated liquid, damage caused by overlarge pressure of the absorption pump is avoided, and the service life of the endoscope 100 is prolonged.

Specifically, the second air hole 43 is disposed at one end of the second movable member 4 away from the partition plate 21 and is in a notch shape, the first air hole 51 penetrates through the end cover 5, and the opening position of the first air hole 51 on the end cover 5 corresponds to the second air hole 43, so that the external air can directly flow into the fourth channel 42 through the first air hole 51 and the second air hole 43.

In this embodiment, the first air holes 51 and the second air holes 43 are respectively provided with two opposite air holes and are correspondingly arranged, however, in other embodiments, the number of the first air holes 51 and the second air holes 43 may be one, three, five, etc., and the arrangement positions may be uniformly arranged on the end cover 5 or the second movable member 4, or may be unevenly arranged on the end cover 5 or the second movable member 4, so long as the external air can pass through the first air holes 51 and the second air holes 43 to enter the fourth channel 42, which is not limited herein.

The end of the second movable member 4 away from the partition plate 21 is provided with an abutment end 41, and the abutment end 41 is provided with a boss 411 extending outwardly from the second movable member 4, and the boss 411 can abut against the fixed member 2, specifically, the connection portion 233, so as to limit the moving distance of the second movable member 4 in the sliding channel 232. Preferably, when the boss 411 abuts against the connection portion 233, the side of the second movable member 4 away from the abutting end 41 just completely covers the third air hole 231 to block the fourth channel 42 and the third air hole 231. Of course, in other embodiments, when the boss 411 abuts against the connection portion 233, the side of the second movable member 4 away from the abutting end 41 may abut against the partition plate 21, that is, in the extending direction of the third channel 13, the size of the second movable member 4 may be larger than the maximum distance between the second channel 12 and the connection portion 233, which is not limited herein.

In this embodiment, the second movable member 4 is configured in a hollow cylindrical shape so as to be adapted to the sliding channel 232, however, in other embodiments, the shapes of the second movable member 4 and the sliding channel 232 may be configured according to practical situations, as long as the second movable member 4 can slide in the sliding channel 232, and the purpose of blocking or communicating the fourth channel 42 with the third air hole 231 by the second movable member 4 can be achieved, which is not limited herein.

Referring to fig. 3 and 11, the end cap 5 is provided with a receiving cavity 53 and an abutting piece 52 extending from the end cap 5 towards the receiving cavity 53, the end cap 5 is sleeved at the end of the valve body 1 to receive part of the valve body 1, the connecting portion 233 and the second movable piece 4 in the receiving cavity 53, the abutting piece 52 abuts against the boss 411, so that the end cap 5 can push the second movable piece 4 to slide in the third channel 13 through the abutting piece 52 under the action of external force.

The second movable member 4 is provided with a second seal groove 44 on an outer wall surface thereof, and the seal 7 is partially accommodated in the second seal groove 44 to sealingly connect the second movable member 4 and the valve body 1. Specifically, the second seal groove 44 is disposed on the outer wall surface of the second movable member 4 and has two seal members 7, and the seal members 7 are partially received in the second seal groove 44 and located between the fixed member 2 and the second movable member 4, and the seal members 7 are mutually pressed by the fixed member 2 and the second movable member 4, so that the seal members 7 are deformed, so as to realize sealing connection between the fixed member 2 and the second movable member 4.

Referring to fig. 4, 6 and 10, the negative pressure valve 200 includes an elastic member 6, the valve body 1 includes an abutting portion 14 disposed in the third channel 13, one end of the elastic member 6 abuts against the abutting portion 14, and the other end abuts against an end of the first movable member 3 away from the fixed member 2. Specifically, the abutment portion 14 extends from the valve body 1 into the third passage 13, and the abutment portion 14 is disposed in an annular shape. Preferably, the elastic member 6 is a spring.

By providing the elastic member 6 between the first movable member 3 and the valve body 1, the first movable member 3 can be kept to cover the first passage 11 without the effect of external force, i.e., the first passage 11 and the third passage 13 are in a blocked state. When the first movable part 3 moves towards a direction away from the fixed part 2 under the action of external force, the elastic part 6 is extruded, and meanwhile, the first channel 11 and the third channel 13 are communicated, so that the cleaning of accumulated liquid is realized. After the external force disappears, the first movable part 3 moves towards the direction close to the fixed part 2 under the action of the elastic part 6, so that the first channel 11 and the third channel 13 are blocked.

In this embodiment, the elastic member 6 releases the elastic force, so that the first movable member 3 moves towards the direction approaching to the fixed member 2, and further pushes the second movable member 4 to move towards the direction away from the fixed member 2, so that the third channel 13 is communicated with the second channel 12, and the gas flows towards the absorption pump through the fourth channel 42 and the second channel 12, and of course, in other embodiments, the elastic member 6 may not be provided, and the end cover 5 is provided with elasticity, and meanwhile, the guide portion 32 is connected with the second movable member 4, so that the end cover 5 moves towards the direction away from the valve body 1 under the action of elasticity, and further drives the second movable member 4 and the first movable member 3 to move, thereby blocking the first channel 11 and the third channel 13, which is not limited herein.

In this embodiment, the negative pressure valve 200 has a first state and a second state, wherein the first state is that cleaning of the accumulated liquid is not needed, at this time, the elastic member 6 is in a free state, one end of the first movable member 3 abuts against the partition plate 21 and blocks the third channel 13 and the first channel 11, the second movable member 4 extends from the fixed member 2 towards a direction away from the partition plate 21, so that the second channel 12 and the fourth channel 42 are communicated, and the external air passes through the first air hole 51, the second air hole 43, the fourth channel 42 and the third air hole 231 and then enters the second channel 12. The second state is to clear up the hydrops, and at this moment, the elastic component 6 is in the compression state, and the first movable component 3 is kept away from division board 21 setting, and the hydrops gets into first passageway 11 after through third passageway 13 and through-hole 311, and second movable component 4 and division board 21 butt to separation fourth passageway 42 and third gas pocket 231 for outside air can't get into second passageway 12, thereby realizes the high-efficient processing to the hydrops.

When the negative pressure valve 200 is switched from the first state to the second state, the end cap 5 is pressed by an external force, so that the end cap 5 is deformed to push the second movable member 4 to move in the sliding channel 232, the first movable member 3 and the second movable member 4 can synchronously move due to the abutting of the end, close to the partition plate 21, of the second movable member 4 with the guide portion 32, and simultaneously the elastic member 6 is extruded, when the second movable member 4 starts to block the second channel 12, the first movable member 3 starts to be far away from the first channel 11, namely, the third channel 13 is communicated with the first channel 11, and when the second movable member 4 completely blocks the second channel 12, the first movable member 3 completely is far away from the first channel 11.

When the negative pressure valve 200 is switched from the second state to the first state, the first movable member 3 is moved toward the partition plate 21 by the urging of the elastic member 6, and the second movable member 4 is moved toward the direction away from the partition plate 21 by the guide portion 32, at this time, the first passage 11 is blocked, the second passage 12 is communicated, and when the first movable member 3 is moved to abut against the partition plate 21, the first passage 11 is completely blocked, cleaning of the liquid accumulation is ended, and at the same time, the second movable member 4 is extended from the slide passage 232 so that the fourth passage 42 and the second passage 12 are communicated.

In this embodiment, the blocking or communication of the first channel 11 with the third channel 13 and the communication or blocking of the second channel 12 with the third channel 13 are performed simultaneously, i.e. when the first channel 11 and the third channel 13 start to communicate, the second channel 12 and the third channel 13 start to be blocked. Of course, in other embodiments, the first movable member 3 and the second movable member 4 may be configured such that, after the second movable member 4 completely blocks the second channel 12, the first movable member 3 starts to communicate with the first channel 11 and the third channel 13, or, after the first movable member 3 completely blocks the first channel 11, the second movable member 4 starts to communicate with the second channel 12 and the third channel 13, which is not limited herein.

In summary, in the negative pressure valve 200 of the present utility model, by providing the first channel 11 and the third channel 13 that are mutually communicated and providing the first movable member 3 that can slide in the third channel 13, by sliding the first movable member 3, direct communication or closing of the first channel 11 and the third channel 13 is achieved, so that the trafficability of the negative pressure valve 200 is enhanced, the negative pressure valve 200 is prevented from being blocked, and further the cleaning speed of the accumulated liquid is improved. By providing the elastic member 6 between the first movable member 3 and the valve body 1, the first movable member 3 can be kept in abutment with the partition plate 21, avoiding the first movable member 3 from moving in a free state, and improving the use stability of the endoscope 100. By providing the sealing element 7 between the first movable element 3 and the valve body 1 and between the second movable element 4 and the fixed element 2, a sealing connection between the first movable element 3 and the valve body 1 and between the second movable element 4 and the fixed element 2 is achieved. By providing the guide on the first movable member 3, providing the guide hole 22 on the partition plate 21 and enabling the guide to abut against the second movable member 4 through the guide hole 22, synchronous movement of the first movable member 3 and the second movable member 4 has been achieved.

The above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present utility model.

Claims (10)

1. A negative pressure valve, comprising:

A valve body (1) is internally provided with a first channel (11), a second channel (12) and a third channel (13) which are communicated with each other, and the first channel (11) and the second channel (12) are adjacently arranged in the extending direction of the third channel (13);

A fixing member (2) including a partition plate (21), the partition plate (21) being accommodated in the third passage (13) and being located between the first passage (11) and the second passage (12);

A first movable member (3) accommodated in the third passage (13) and capable of sliding in the third passage (13) to block or communicate the first passage (11) and the third passage (13);

A second movable member (4) accommodated in the third channel (13) and capable of sliding in the third channel (13) to block or communicate the second channel (12) and the third channel (13);

The division plate (21) is provided with a guide hole (22), part of the first movable piece (3) can pass through the guide hole (22) to be abutted with the second movable piece (4), or part of the second movable piece (4) can pass through the guide hole (22) to be abutted with the first movable piece (3), so that the first movable piece (3) and the second movable piece (4) synchronously move.

2. The negative pressure valve of claim 1, wherein: the first movable piece (3) comprises a movable part (31) and a through hole (311) arranged in the movable part (31), and the third channel (13) can be communicated with the first channel (11) through the through hole (311).

3. The negative pressure valve of claim 2, wherein: the first movable piece (3) further comprises a guide part (32) fixedly connected with the movable part (31), and the guide part (32) penetrates through the guide hole (22) and is abutted with the second movable piece (4).

4. A negative pressure valve according to claim 3, characterized in that: the first movable piece (3) is in sliding sealing connection with the fixed piece (2).

5. The negative pressure valve according to any one of claims 1 to 4, characterized in that: the negative pressure valve (200) comprises an elastic piece (6), the valve body (1) comprises an abutting portion (14) arranged in the third channel (13), one end of the elastic piece (6) abuts against the abutting portion (14), and the other end of the elastic piece abuts against one end of the first movable piece (3) away from the fixed piece (2).

6. The negative pressure valve of claim 1, wherein: the second movable part (4) is provided with a fourth channel (42), and the second channel (12) can be communicated with the outside through the fourth channel (42).

7. The negative pressure valve of claim 6, wherein: the negative pressure valve (200) comprises an end cover (5) covered at the tail end of the valve body (1), a first air hole (51) is formed in the end cover (5), and a second air hole (43) which is communicated with the fourth channel (42) and corresponds to the first air hole (51) is formed in the second movable piece (4).

8. The negative pressure valve of claim 6, wherein: the fixing piece (2) comprises a main body (23) fixedly connected with the partition plate (21), a sliding channel (232) and a third air hole (231) are formed in the main body (23), the third air hole (231) corresponds to the second channel (12) so as to be communicated with the sliding channel (232) and the second channel (12), and the second movable piece (4) is contained in the sliding channel (232) and can slide in the sliding channel (232) so as to block or be communicated with the fourth channel (42) and the third air hole (231).

9. The negative pressure valve of claim 1, wherein: the negative pressure valve (200) further comprises a sealing element (7), a first sealing groove (312) is formed in the outer wall surface of the first movable element (3), and the sealing element (7) is partially accommodated in the first sealing groove (312) so as to be in sealing connection with the first movable element (3) and the valve body (1); the outer wall surface of the second movable piece (4) is provided with a second sealing groove (44), and the sealing piece (7) is partially accommodated in the second sealing groove (44) so as to be in sealing connection with the second movable piece (4) and the valve body (1).

10. An endoscope, characterized in that: comprising an operating member (500), a suction tube (300) and a negative pressure valve (200) according to any one of claims 1-9, the negative pressure valve (200) and the suction tube (300) being both connected to the operating member (500) and the negative pressure valve (200) being in communication with the suction tube (300).