CN117967833A - Control valve and endoscope flushing device - Google Patents

Abstract

The present application relates to a control valve and an endoscope flushing device. A control valve for an endoscope flushing device comprises a valve body and a valve core, wherein the valve body is provided with a containing cavity, and an air inlet, a liquid inlet, a main liquid inlet and an auxiliary liquid inlet are formed in the valve body. The valve core movably penetrates into the accommodating cavity along the axial direction of the valve body. The valve core is provided with a first working position, a second working position and a third working position which are arranged at intervals along the axial direction of the valve body, and when the valve core is in the first working position, the valve core is configured to be capable of operably communicating with the air inlet and the air outlet. When the valve core is in the second working position, the liquid inlet and the main liquid feeding port are communicated with each other, and the air inlet and the air feeding port are not communicated with each other. When the valve core is in the third working position, the liquid inlet and the auxiliary liquid delivery port are communicated with each other, and the air inlet and the air delivery port are not communicated with each other. By using the control valve, the valve core of the control valve can be controlled to respectively carry out air supply, main water supply and auxiliary water supply, so that the convenience of cleaning operation is improved.

Description

Control valve and endoscope flushing device

Technical Field

The application relates to the technical field of endoscopes, in particular to a control valve and an endoscope flushing device.

Background

Endoscopes are detection instruments that integrate traditional optics, ergonomics, precision machinery, modern electronics, mathematics, software, and the like.

When the endoscope is used, if foreign matters exist in the lens of the endoscope, the foreign matters can shield the affected part, so that medical staff cannot timely and comprehensively know the condition of the affected part, and the effect of operation or examination is affected. However, the conventional endoscope washing apparatus has a problem in that the washing operation is inconvenient.

Disclosure of Invention

Based on this, it is necessary to provide a control valve and an endoscope flushing device for solving the problem that the conventional endoscope flushing device is inconvenient in cleaning operation.

According to one aspect of the present application, there is provided a control valve for an endoscopic flushing device, the control valve comprising:

the valve body is provided with a containing cavity, and is provided with an air inlet, an air supply port, a liquid inlet, a main liquid supply port and an auxiliary liquid supply port;

the valve core movably penetrates into the accommodating cavity along the axial direction of the valve body;

The valve core is provided with a first working position, a second working position and a third working position which are arranged at intervals along the axial direction of the valve body;

the valve spool is configured to operably communicate the air inlet and the air bleed when the valve spool is in the first operating position;

When the valve core is in the second working position, the liquid inlet and the main liquid delivery port are communicated with each other, and the air inlet and the air delivery port are not communicated with each other;

when the valve core is in the third working position, the liquid inlet and the auxiliary liquid delivery port are communicated with each other, and the air inlet and the air delivery port are not communicated with each other.

In one embodiment, the control valve further comprises a first seal provided to an outer peripheral wall of the valve spool;

when the valve core is in the first working position, the first sealing piece is positioned between the liquid inlet and the main liquid outlet along the axial direction of the valve body, and is in sealing connection between the outer peripheral wall of the valve core and the inner peripheral wall of the valve body, so that the main liquid outlet and the auxiliary liquid outlet are not communicated with the liquid inlet respectively.

In one embodiment, when the valve core is in the second working position, the first sealing member and the inner peripheral wall of the valve body are spaced along the radial direction of the valve core, and the liquid inlet and the main liquid inlet are communicated with each other.

In one embodiment, the control valve further includes two second seals disposed at intervals from the first seal in the axial direction of the spool;

When the valve core is in the second working position, the second sealing parts are connected between the outer peripheral wall of the valve core and the inner peripheral wall of the valve body in a sealing mode, and the auxiliary liquid feeding port is located between the two second sealing parts, so that the liquid inlet and the auxiliary liquid feeding port are not communicated with each other.

In one embodiment, the valve cartridge has a communication passage;

When the valve core is in the third working position, the liquid inlet is communicated with the auxiliary liquid delivery port through the communication channel, the second sealing parts are all connected between the outer peripheral wall of the valve core and the inner peripheral wall of the valve body in a sealing mode, and the main liquid delivery port is located between the two second sealing parts, so that the liquid inlet and the main liquid delivery port are not communicated with each other.

In one embodiment, the control valve further includes a third seal member disposed at a distance from the two second seal members in an axial direction of the spool; the third sealing element is blocked between the air inlet and the liquid inlet, between the air inlet and the main liquid delivery port, and between the air inlet and the auxiliary liquid delivery port, so that the air inlet is not communicated with the liquid inlet, the main liquid delivery port and the auxiliary liquid delivery port respectively.

In one embodiment, the accommodating cavity comprises an air inlet cavity communicated with the air inlet;

The control valve further comprises a fourth sealing element, wherein the fourth sealing element is connected between the outer peripheral wall of the valve core and the inner peripheral wall of the valve body and is configured to define a communication port with the inner peripheral wall of the valve body so as to communicate the air inlet and the air outlet when the air pressure in the air inlet cavity is greater than or equal to a preset value.

In one embodiment, the valve element has an exhaust passage in communication with the intake chamber, the valve element being configured to be operable to seal against an outlet of the exhaust passage to enable the air pressure within the intake chamber to reach the preset value.

In one embodiment, the fourth seal member includes a main body portion and a weakened portion connected in an axial direction of the valve body;

the main body part is arranged on the outer peripheral wall of the valve core; the main body part is used for being in sealing connection with the inner peripheral wall of the valve body so that the air inlet and the air outlet are not communicated with each other;

The weak portion deviates from one side of main part is equipped with the depressed part, the depressed part is along the axis direction of case towards being close to one side of main part is sunken, so that the weak portion can be when the atmospheric pressure in the air inlet chamber is greater than or equal to the default with the inner peripheral wall separation of valve body, and prescribe a limit to the intercommunication mouth.

In one embodiment, the radial dimension of the body portion is tapered in a direction along the weakened portion toward the body portion.

In one embodiment, when the valve core is in the second working position or the third working position, one side of the main body part, which is away from the valve core, is connected to the inner peripheral wall of the valve body in a sealing manner, so that the air inlet and the air outlet are not communicated with each other.

According to another aspect of the present application, there is provided an endoscopic irrigation device comprising the control valve described above.

In one embodiment, the endoscopic flushing device further comprises:

The air inlet pipe is used for supplying air to the lens of the endoscope; the air inlet pipe is communicated with the air inlet;

The liquid supply container is provided with a containing cavity for containing cleaning liquid, and the air inlet pipe is communicated with the containing cavity; and

The liquid inlet pipe is used for providing cleaning liquid for the lens of the endoscope; one end of the liquid inlet pipe extends into the cleaning liquid in the accommodating cavity, and the other end of the liquid inlet pipe is communicated with the liquid inlet.

In the control valve and the endoscope flushing device, when the control valve is required to perform the air feeding operation, the valve body can be controlled so that the air inlet and the air outlet communicate with each other, and thus, the air flowing into the air inlet can flow to the lens of the endoscope through the air outlet, thereby realizing the air feeding operation. When the main water supply operation is needed, the valve core can be moved relative to the valve body along the axial direction of the valve body so that the valve core is in the second working position, at the moment, the liquid inlet and the main liquid supply port are communicated with each other, the air inlet and the air supply port are not communicated with each other, and the cleaning liquid can flow to the lens of the endoscope through the liquid inlet and the main liquid supply port, so that the lens of the endoscope can be cleaned. When auxiliary water supply operation is needed, the valve core can move relative to the valve body along the axial direction of the valve body so that the valve core is in a third working position, at the moment, the liquid inlet and the auxiliary liquid supply port are communicated with each other, the air inlet and the air supply port are not communicated with each other, and cleaning liquid can flow to the focus of the lens of the endoscope through the liquid inlet and the auxiliary liquid supply port, so that the focus of the lens of the endoscope can be cleaned. It can be understood that by using the control valve, the operations of air supply, main water supply and auxiliary water supply can be respectively performed by controlling the valve core of the control valve, so that the operation is easy, and the convenience of cleaning operation is improved.

Drawings

FIG. 1 shows a schematic view of an endoscopic irrigation apparatus in an embodiment of the present application;

FIG. 2 is a schematic view showing the structure of a control valve (schematic view of the air supply process) in an embodiment of the present application;

FIG. 3 is a schematic diagram of a control valve (schematic diagram of a main liquid feeding process) according to an embodiment of the present application;

fig. 4 is a schematic diagram showing the structure of a control valve (schematic diagram of a sub-liquid feeding process) in an embodiment of the present application;

Fig. 5 shows a schematic structural view of a fourth seal in an embodiment of the present application.

In the figure: 10. an endoscope flushing device;

100. A control valve;

111. A valve body; 1111. a housing chamber; 11111. a first chamber; 11112. a second chamber; 11113. an air inlet cavity; 1112. an air inlet; 1113. an air supply port; 1114. a liquid inlet; 1115. a mounting port; 1116. a first step portion; 1117. a second step portion; 112. a valve core; 1121. an exhaust passage; 1122. a communication passage; 11221. a first opening; 11222. a second opening; 1123. a clamping groove; 1124. a pressing part; 113. a fourth seal; 1131. a main body portion; 1132. a weak portion; 11321. a first face; 11322. a second face; 1133. a recessed portion; 114. a first elastic member; 115. a first seal; 116. a second seal; 117. a third seal; 118. a fifth seal; 131. a main liquid feeding port; 132. a secondary liquid feed port;

200. an air inlet pipe; 210. a main air inlet pipe; 220. a branched air inlet pipe;

300. A liquid supply container; 301. a receiving chamber;

400. a liquid inlet pipe; 500. an air supply pipe; 600. a main liquid feeding pipe; 700. and a secondary liquid delivery pipe.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

The inventor has found through research that, the traditional endoscope flushing device comprises an air supply pipe, a main water supply pipe and an auxiliary water supply pipe, wherein the air supply pipe is provided with an air supply valve, the main water supply pipe is provided with a main water supply valve, the auxiliary water supply pipe is provided with an auxiliary water supply valve, if air supply operation is required, the air supply valve needs to be opened, the main water supply valve and the auxiliary water supply valve are closed, if main water supply operation is required, the main water supply valve needs to be opened, the air supply valve and the auxiliary water supply valve are closed, and if auxiliary water supply operation is required, the auxiliary water supply valve needs to be opened, and the air supply valve and the main water supply valve are closed, so that the cleaning operation is very inconvenient.

In order to solve the problem that the conventional endoscope flushing device is inconvenient to clean, the inventor has intensively studied and designed a control valve which can be controlled to perform air supply, main water supply and auxiliary water supply operations respectively, and is convenient to operate.

Fig. 1 shows a schematic configuration of an endoscopic flushing device 10 in an embodiment of the present application.

Referring to fig. 1, the endoscope flushing device 10 includes a control valve 100, and is capable of performing air supply, main water supply, and sub water supply operations, respectively, by means of the control valve 100.

Fig. 2-4 show schematic structural views of a control valve 100 in an embodiment of the present application.

One embodiment of the present application provides a control valve 100 for an endoscopic irrigation device 10, the control valve 100 comprising a valve body 111 and a valve cartridge 112. The valve body 111 has a housing cavity 1111, the valve body 111 is provided with an air inlet 1112, an air supply 1113, a liquid inlet 1114, a main liquid supply 131 and a sub liquid supply 132, the valve core 112 movably penetrates the housing cavity 1111 along the axial direction of the valve body 111, the valve core 112 has a first working position, a second working position and a third working position which are arranged at intervals along the axial direction of the valve body 111, as shown in fig. 2, the valve core 112 is in the first working position, as shown in fig. 3, the valve core 112 is in the second working position, as shown in fig. 4, and the valve core 112 is in the third working position.

When the spool 112 is in the first operating position, the spool 112 is configured to operably communicate the air inlet 1112 and the air bleed 1113.

When the control valve 100 is used, the air inlet 1112 is externally connected with an air source (for example, in the embodiment shown in fig. 1, the air inlet 1112 is connected with the air source through the air inlet pipe 200, the air source can supply air required for cleaning to the air inlet 1112 through the air inlet pipe 200), the air supply pipe 500 is connected to the air supply port 1113, an air spraying port facing the lens of the endoscope is arranged at one end of the air supply pipe 500 away from the air supply port 1113, and when the control valve 100 is required to perform air supply operation, the valve core 112 can be controlled so that the air inlet 1112 and the air supply port 1113 are communicated with each other, and thus the air supply operation can be performed on the lens of the endoscope well.

When the spool 112 is in the second working position, the liquid inlet 1114 and the main liquid feed port 131 communicate with each other, and the air inlet 1112 and the air feed port 1113 do not communicate with each other; when the spool 112 is in the third operating position, the intake port 1114 and the sub-feed port 132 communicate with each other, and the intake port 1112 and the air feed port 1113 do not communicate with each other.

When the control valve 100 is used, the cleaning liquid can be supplied to the liquid inlet 1114, a main liquid delivery pipe 600 communicated with the main liquid delivery port 131 is connected to the main liquid delivery port 131, a main liquid spraying port facing the lens of the endoscope is arranged at one end of the main liquid delivery pipe 600 away from the main liquid delivery port 131, a sub liquid delivery pipe 700 can be connected to the sub liquid delivery port 132, and a sub liquid spraying port facing a focus is arranged at one end of the sub liquid delivery pipe 700 away from the sub liquid delivery port 132. When the main water feeding operation is required, the valve core 112 can be moved relative to the valve body 111 along the axial direction of the valve body 111 so that the valve core 112 is in the second working position, at this time, the liquid inlet 1114 and the main liquid feeding port 131 are communicated with each other, the air inlet 1112 and the air feeding port 1113 are not communicated with each other, and the cleaning liquid can flow to the lens of the endoscope through the liquid inlet 1114 and the main liquid feeding port 131, so that the lens of the endoscope can be cleaned.

When the auxiliary water supply operation is required, the valve core 112 can be moved relative to the valve body 111 along the axial direction of the valve body 111, so that the valve core 112 is in the third working position, at this time, the liquid inlet 1114 and the auxiliary liquid supply port 132 are communicated with each other, the air inlet 1112 and the air outlet 1113 are not communicated with each other, and the cleaning liquid can flow to the focus of the lens of the endoscope through the liquid inlet 1114 and the auxiliary liquid supply port 132, so that the focus of the lens of the endoscope can be cleaned.

It can be appreciated that with the control valve 100, the operations of air supply, main water supply, and sub water supply can be performed by manipulating the valve body 112 of the control valve 100, respectively, which is easy to operate, and improves the convenience of the cleaning operation.

In some embodiments, referring to fig. 1 in combination with fig. 3 and 4, the endoscope flushing device 10 further includes an air inlet pipe 200, a liquid supply container 300 and a liquid inlet pipe 400, wherein the air inlet pipe 200 is used for supplying air to the lens of the endoscope, the air inlet pipe 200 is communicated with the air inlet 1112, the liquid supply container 300 is provided with a containing cavity 301 for containing cleaning liquid, the air inlet pipe 200 is communicated with the containing cavity 301, the liquid inlet pipe 400 is used for supplying cleaning liquid to the lens of the endoscope, one end of the liquid inlet pipe 400 extends into the cleaning liquid in the containing cavity 301, and the other end of the liquid inlet pipe 400 is communicated with the liquid inlet 1114.

So set up, when case 112 is in the second working position, inlet 1114 and main feed port 131 communicate each other, air inlet 1112 and air feed port 1113 are not mutually communicated each other, inlet 1114 and vice feed port 132 are not mutually communicated, the gas that is carried into holding chamber 1111 through intake pipe 200 will be discharged back to intake pipe 200 from air inlet 1112, and then can get into holding chamber 301, this part of gas can be with holding the washing liquid pressure in the chamber 301 and send to inlet 1114, and then carry to the camera lens of endoscope through main feed port 131, can wash the camera lens of endoscope to can realize main feed operation.

Similarly, when the valve core 112 is at the third working position, the liquid inlet 1114 and the auxiliary liquid outlet 132 are communicated with each other, the liquid inlet 1114 and the main liquid outlet 131 are not communicated with each other, and the air inlet 1112 and the air outlet 1113 are not communicated with each other, so that the air in the accommodating cavity 1111 can be discharged back to the air inlet pipe 200 from the air inlet 1112, and then can enter the accommodating cavity 301, the part of air can press and send the cleaning liquid in the accommodating cavity 301 to the liquid inlet 1114, and then is conveyed to the focus of the lens of the endoscope through the auxiliary liquid outlet 132, and the focus of the lens of the endoscope can be cleaned, so that the auxiliary water delivery operation can be realized.

It can be appreciated that, in the endoscope flushing device 10, the control valve 100 can be controlled to enable the air flowing into the air inlet pipe 200 to be pressurized and fed with the cleaning liquid, so that the air supply operation, the main water supply operation and the auxiliary water supply operation can share one air source, the water supply pump is omitted, the auxiliary water supply operation is not required to be performed by additionally operating the foot switch, the overall cost of the endoscope flushing device 10 is saved to a certain extent, and the convenience of the cleaning operation is improved.

In some embodiments, referring to fig. 1, the air inlet pipe 200 includes a main air inlet pipe 210 and a branch air inlet pipe 220 connected to the main air inlet pipe 210, an air source is connected to one end of the main air inlet pipe 210 to supply air to the main air inlet pipe 210, the control valve 100 is disposed at the other end of the main air inlet pipe 210, the other end of the main air inlet pipe 210 is communicated with the air inlet 1112, and a connection between the main air inlet pipe 210 and the branch air inlet pipe 220 is located between the air source and the control valve 100, so that the air source inputs air into the main air inlet pipe 210, and can flow into the branch air inlet pipe 220 and the control valve 100, respectively, and the air of the air source can flow into the accommodating cavity 1111 of the control valve 100.

In some embodiments, referring to fig. 2, the control valve 100 further includes a first sealing member 115 disposed on an outer peripheral wall of the valve core 112, when the valve core 112 is in the first working position, the first sealing member 115 is located between the liquid inlet 1114 and the main liquid outlet 131 along the axial direction of the valve body 111, and the first sealing member 115 is sealingly connected between the outer peripheral wall of the valve core 112 and the inner peripheral wall of the valve body 111, so that the main liquid outlet 131 and the auxiliary liquid outlet 132 are not communicated with the liquid inlet 1114 respectively.

When the valve core 112 is in the first working position, the main fluid delivery port 131 and the auxiliary fluid delivery port 132 are not communicated with the fluid inlet 1114, that is, the main fluid delivery port 131 and the fluid inlet 1114 are not communicated with each other, and the auxiliary fluid delivery port 132 and the fluid inlet 1114 are not communicated with each other, which is beneficial to improving the reliability of the air delivery operation.

In some embodiments, the first seal 115 is spaced from the inner peripheral wall of the valve body 111 in the radial direction of the valve spool 112 when the valve spool 112 is in the second working position, and the fluid inlet 1114 and the main fluid feed port 131 communicate with each other.

Specifically, the housing chamber 1111 includes a first chamber 11111 and a second chamber 11112 disposed from bottom to top in the axial direction of the valve body 111, the first chamber 11111 is in communication with the fluid inlet 1114, the radial dimension of the first chamber 11111 is larger than the radial dimension of the second chamber 11112, the first seal 115 is disposed in the first chamber 11111 and is sealingly connected between the outer peripheral wall of the valve core 112 and the inner peripheral wall of the valve body 111 when the valve core 112 is in the first operating position, and the first seal 115 is disposed in the first chamber 11111 when the valve core 112 is in the second operating position, such that the first seal 115 and the inner peripheral wall of the valve body 111 have a spacing in the radial direction of the valve core 112, allowing the fluid inlet 1114 to communicate with each other through the main fluid feed port 131.

It will be appreciated that the first seal 115 is disposed between the main fluid feed port 131 and the fluid feed port 1114 when the valve spool 112 is in the first operating position, and that the main fluid feed port 131 and the fluid feed port 1114 can communicate with each other through the space between the first seal 115 and the inner peripheral wall of the valve body 111 when the valve spool 112 is in the second operating position.

In some embodiments, the control valve 100 further includes two second seals 116 spaced apart from the first seal 115 along the axial direction of the spool 112. When the valve body 112 is in the second working position, the second seal 116 is sealingly connected between the outer peripheral wall of the valve body 112 and the inner peripheral wall of the valve body 111, and the auxiliary liquid feed port 132 is located between the two second seals 116 so that the liquid feed port 1114 and the auxiliary liquid feed port 132 are not communicated with each other. Specifically, when the spool 112 is in the second working position, the inlet of the auxiliary liquid feed port 132 is located between the two second seals 116.

When the valve core 112 is in the second working position, the two second sealing elements 116 can be utilized to make the liquid inlet 1114 and the auxiliary liquid outlet 132 not communicated with each other, so that the valve core 112 can be controlled to be in the second working position, so that the main water feeding operation can be independently performed, and the reliability of the main water feeding operation can be improved to a certain extent.

In some embodiments, the valve core 112 has a communication channel 1122, and when the valve core 112 is in the third working position, the fluid inlet 1114 is in communication with the auxiliary fluid outlet 132 via the communication channel 1122, all the second seals 116 are sealingly connected between the outer peripheral wall of the valve core 112 and the inner peripheral wall of the valve body 111, and the main fluid outlet 131 is located between the two second seals 116, so that the fluid inlet 1114 and the main fluid outlet 131 are not in communication with each other. Specifically, when the spool 112 is in the third operating position, the inlet of the main feed 131 is located between the two second seals 116.

When the valve spool 112 is in the third working position, the first seal 115 and the inner peripheral wall of the valve body 111 have a spacing in the radial direction of the valve spool 112, and the liquid inlet 1114 and the sub-liquid-feed port 132 communicate with each other; however, the two second sealing members 116 may be used to make the liquid inlet 1114 and the main liquid outlet 131 not communicate with each other, so that the valve core 112 may be controlled to be in the third working position, so as to perform the auxiliary water delivery operation independently, which is beneficial to improving the reliability of the auxiliary water delivery operation to a certain extent.

In some embodiments, the main liquid feed port 131 and the auxiliary liquid feed port 132 are disposed at intervals along the axial direction of the valve body 111 in the valve body 111, and the main liquid feed port 131 is closer to the liquid feed port 1114 than the auxiliary liquid feed port 132 along the axial direction of the valve body 111. Wherein the axial direction of the valve body 111 is parallel to the axial direction of the valve core 112.

Because the frequency of use of the main water feeding operation is higher than that of the main water feeding operation, the main water feeding port 131 is closer to the liquid inlet 1114, which is beneficial to reducing the water feeding stroke to a certain extent and improving the efficiency of the main water feeding operation.

In some embodiments, the communication passage 1122 has a first opening 11221 and a second opening 11222 that are oppositely disposed from bottom to top in the axial direction of the valve body 111, the first opening 11221 being located between the first seal 115 and one of the second seals 116 (the second seal 116 being the second seal 116 adjacent to the first seal 115 of the two second seals 116), the second opening 11222 being located between the other second seal 116 (the other second seal 116 being located on the side of the second seal 116 adjacent to the first seal 115 facing away from the first seal 115) and a third seal 117 described below, the first opening 11221 of the communication passage 1122 being in communication with the inlet 1114 when the valve spool 112 is in the second working position, but the inlet of the auxiliary liquid feed port 132 being located between the two second seals 116 adjacent to the first seal 115 such that the auxiliary liquid feed port 132 and the second opening 11222 are not in communication with each other, such that the auxiliary liquid feed port 132 and the inlet 1114 are not in communication with each other.

In the third operating position of the spool 112, the first opening 11221 of the communication passage 1122 communicates with the liquid inlet 1114, and the second opening 11222 of the communication passage 1122 communicates with the sub-liquid-feed port 132, so that the sub-liquid-feed port 132 and the liquid inlet 1114 communicate with each other.

In some embodiments, the control valve 100 further includes a third sealing member 117 disposed at intervals from the two second sealing members 116 along the axial direction of the valve core 112, and the third sealing member 117 and the first sealing member 115 are respectively disposed on opposite sides of the two second sealing members 116 along the axial direction of the valve core 112, and the third sealing member 117 is blocked between the air inlet 1112 and the liquid inlet 1114, between the air inlet 1112 and the main liquid inlet 131, and between the air inlet 1112 and the auxiliary liquid inlet 132, so that the air inlet 1112 is not communicated with the liquid inlet 1114, the main liquid inlet 131, and the auxiliary liquid inlet 132, respectively.

In this way, the air feeding operation and the liquid feeding operation can be kept from interfering with each other, and the reliability of the air feeding operation, the main liquid feeding operation, and the sub liquid feeding operation can be improved.

In some embodiments, referring to fig. 2 and 4, one end of the valve core 112 extends out of the accommodating cavity 1111, and a pressing portion 1124 is provided to facilitate pressing the valve core 112 by the pressing portion 1124, so as to drive the valve core 112 to move from the first working position to the second working position or the third working position along the axial direction of the valve body 111.

In some embodiments, referring to fig. 2-4, the valve core 112 is provided with a first elastic member 114 extending along an axial direction of the valve core 112, the first elastic member 114 is located outside the accommodating cavity 1111, and the first elastic member 114 is respectively connected to the valve core 112 and the valve body 111, so as to enable the valve core 112 to be reset after external force applied to the valve core 112 is removed. That is, after the external force applied to the valve body 112 is removed, the valve body 112 can be returned to the first operating position from the second operating position or the third operating position by the elastic restoring force of the first elastic member 114.

In some embodiments, referring to fig. 2, the valve body 111 is provided with a mounting opening 1115 for the valve core 112 to pass through, the mounting opening 1115 communicates with the receiving cavity 1111, and the valve core 112 can be disposed in the receiving cavity 1111 through the mounting opening 1115. The fifth sealing member 118 is disposed on the outer peripheral wall of the valve core 112, and the fifth sealing member 118 is connected between the outer peripheral wall of the valve core 112 and the inner peripheral wall of the valve body 111 in a sealing manner, so as to block the accommodating cavity 1111 and the external environment, prevent the accommodating cavity 1111 from being communicated with the external environment through the mounting hole 1115, and facilitate improvement of the sealing performance of the air supplying operation. In the present embodiment, the fifth sealing member 118 may be clamped to the outer peripheral wall of the valve core 112.

In some embodiments, the housing cavity 1111 includes an air inlet cavity 11113 in communication with the air inlet 1112, the control valve 100 further includes a fourth sealing member 113, and the fourth sealing member 113 is connected between an outer peripheral wall of the valve core 112 and an inner peripheral wall of the valve body 111, and is configured to define a communication port with the inner peripheral wall of the valve body 111 to communicate the air inlet 1112 with the air outlet 1113 when the air pressure in the air inlet cavity 11113 is greater than or equal to a predetermined value.

"The fourth seal 113 is sealingly connected between the outer circumferential wall of the valve body 112 and the inner circumferential wall of the valve body 111 to block the air inlet 1112 and the air outlet 1113" means that the fourth seal 113 sealingly connected between the outer circumferential wall of the valve body 112 and the inner circumferential wall of the valve body 111 can block the air inlet 1112 and the air outlet 1113. For example, the fourth seal 113 is located between a portion of the valve body 111 where the air inlet 1112 is provided and a portion of the valve body 111 where the air outlet 1113 is provided, so that the air inlet 1112 and the air outlet 1113 do not communicate with each other to block the air inlet 1112 and the air outlet 1113.

The fourth seal 113 is sealingly connected between the outer peripheral wall of the valve body 112 and the inner peripheral wall of the valve body 111, and thus can block the air inlet 1112 and the air outlet 1113, which is advantageous in improving the air tightness of the control valve 100. If the air pressure in the air inlet cavity 11113 is greater than or equal to the preset value, it indicates that the air tightness in the accommodating cavity 1111 is better, and at this time, a communication port can be defined between the fourth sealing member 113 and the inner peripheral wall of the valve body 111, so that the air inlet 1112 and the air outlet 1113 are communicated with each other, and air feeding operation to the lens of the endoscope can be well realized. The control valve 100 can avoid gas leakage in the gas supply process, and can effectively improve the air tightness and reliability of the control valve 100.

Specifically, the intake cavity 11113 is located between the fourth seal 113 and the third seal 117.

In some embodiments, the fourth seal 113 has elasticity and is configured to deform and separate from the inner circumferential wall of the valve body 111 to define the communication port when the air pressure in the air intake chamber 11113 is greater than or equal to a preset value.

In this way, when the air pressure in the air inlet chamber 11113 is greater than or equal to a preset value, the fourth sealing member 113 can be deformed and separated from the inner peripheral wall of the valve body 111 to define a communication port, so that the air inlet 1112 and the air outlet 1113 communicate with each other, and further the air supply operation to the lens of the endoscope can be realized.

In some embodiments, the valve spool 112 has an exhaust passage 1121 in communication with the intake chamber 11113, the valve spool 112 being configured to operably seal the outlet of the exhaust passage 1121 to enable the air pressure within the intake chamber 11113 to reach a preset value.

In use, the outlet of the exhaust passage 1121 can be sealed and blocked by a finger or a sealing plug (fig. 2 shows an example of the outlet of the exhaust passage 1121 blocked by a finger), so that the exhaust passage 1121 is not communicated with the external environment, and the air source introduces air into the accommodating cavity 1111 through the air inlet pipe 200 and the air inlet 1112, so that the air pressure in the air inlet cavity 11113 can reach a preset value, and a communication port is defined between the fourth sealing member 113 and the inner peripheral wall of the valve body 111, so that the air inlet 1112 and the air outlet 1113 are communicated with each other, and thus the air supply operation of the lens of the endoscope can be well realized.

It will be appreciated that if the outlet of the exhaust passage 1121 is not blocked by a finger or a sealing plug, the air pressure of the air inlet chamber 11113 may be less than a predetermined value, and the fourth sealing member 113 may be restored to an initial state by the restoring force of elastic deformation and be sealingly connected between the outer circumferential wall of the valve core 112 and the inner circumferential wall of the valve body 111 to block the air inlet 1112 and the air outlet 1113, so that the air tightness of the control valve 100 may be improved by the fourth sealing member 113, and the air leakage of the air inlet pipe 200 through the air outlet 1113 may be avoided when the air supply is not required.

It should be noted that, the gas source (e.g., the air pump) for supplying the gas to the gas inlet 1112 may be always in an opened state, and when the gas is not supplied, the gas flowing from the gas inlet 1112 into the gas inlet chamber 11113 may be discharged to the external environment through the gas outlet passage 1121.

In the present embodiment, the exhaust passage 1121 penetrates the valve body 111 in the axial direction of the valve body 111 and penetrates to the pressing portion 1124, that is, the outlet of the exhaust passage 1121 is provided on the pressing portion 1124, so that the outlet provided in the exhaust passage 1121 is conveniently sealed by a finger or a sealing plug.

In this embodiment, the air inlet cavity 11113 is communicated with the inlet of the air outlet channel 1121, and the outlet of the air outlet channel 1121 can be sealed and blocked by a finger or a sealing plug, so that the air outlet channel 1121 is not communicated with the external environment, and the air source introduces air into the accommodating cavity 1111 through the air inlet pipe 200 and the air inlet 1112, so that the air pressure in the air inlet cavity 11113 can reach a preset value.

In some embodiments, referring to fig. 5, the fourth sealing member 113 includes a main body portion 1131 and a weak portion 1132 connected along an axial direction of the valve body 111, the main body portion 1131 is disposed on an outer peripheral wall of the valve body 112, the main body portion 1131 is configured to be in sealing connection with an inner peripheral wall of the valve body 111 so that the air inlet 1112 and the air outlet 1113 are not communicated with each other, a recess portion 1133 is disposed on a side of the weak portion 1132 facing away from the main body portion 1131, and the recess portion 1133 is recessed toward a side near the main body portion 1131 along the axial direction of the valve body 112 so that the weak portion 1132 can be separated from an inner peripheral wall of the valve body 111 when an air pressure in the air inlet cavity 11113 is greater than or equal to a preset value, and defines a communication port.

The side of the weakened portion 1132 facing away from the main body portion 1131 refers to the side of the weakened portion 1132 facing away from the main body portion 1131 in the axial direction of the valve spool 112.

The weak portion 1132 refers to a portion of the fourth sealing member 113 that is connected to the main body portion 1131 and is capable of separating from the inner circumferential wall of the valve body 111 when the air pressure in the air intake chamber 11113 is greater than or equal to a preset value.

When the air pressure in the air intake cavity 11113 is greater than or equal to a preset value, the weak portion 1132 can be separated from the inner peripheral wall of the valve body 111, and a communication port is defined between the weak portion 1132 and the inner peripheral wall of the valve body 111, so that the air intake 1112 and the air supply 1113 are communicated with each other, and air supply operation to the lens of the endoscope can be well achieved.

In some embodiments, the weak portion 1132 is disposed at an angle to the radial direction of the receiving chamber 1111, and the weak portion 1132 has a predetermined thickness so as to be separated from the inner circumferential wall of the valve body 111 when the air pressure in the air intake chamber 11113 is greater than or equal to a predetermined value, and define a communication port with the inner circumferential wall of the valve body 111.

Referring to fig. 5, the weak portion 1132 has a first face 11321 facing away from the valve core 112, and a second face 11322 disposed opposite the first face 11321, and the thickness of the weak portion 1132 refers to the dimension of the weak portion 1132 along the first face 11321 in a direction toward the second face 11322.

If the thickness of the weak portion 1132 is too thin, the sealability between the inner peripheral walls of the valve body 111 of the fourth sealing member 113 is affected when the air pressure in the air intake chamber 11113 is less than a preset value, and if the thickness of the weak portion 1132 is too thin, the weak portion 1132 is not easily separated from the inner peripheral walls of the valve body 111 when the air pressure in the air intake chamber 11113 is greater than or equal to the preset value. Therefore, it is necessary to provide the weak portion 1132 with a predetermined thickness, so that the weak portion 1132 can be separated from the inner peripheral wall of the valve body 111 and define a communication port with the inner peripheral wall of the valve body 111, while ensuring the sealing property between the inner peripheral walls of the valve body 111 of the fourth sealing member 113 when the air pressure in the air intake chamber 11113 is less than a predetermined value, and also when the air pressure in the air intake chamber 11113 is greater than or equal to a predetermined value.

In some embodiments, referring to fig. 2 in combination with fig. 5, the outer peripheral wall of the valve core 112 is provided with a clamping groove 1123, the main body 1131 is provided with a clamping part matched with the clamping groove 1123, and the outer peripheral wall of the valve core 112 and the main body 1131 are clamped by means of the clamping groove 1123 and the clamping part.

The main body 1131 of the fourth sealing member 113 may be clamped to the outer peripheral wall of the valve core 112, so that the fourth sealing member 113 may be easily assembled and disassembled or replaced.

In some embodiments, when the spool 112 is in the second or third operating position, the side of the main body 1131 facing away from the spool 112 is sealingly connected to the inner peripheral wall of the valve body 111 so that the air inlet 1112 and the air outlet 1113 are not in communication with each other.

It can be appreciated that, compared to the weak portion 1132, the sealing performance of the main body 1131 is better (the contact area between the main body 1131 of the fourth sealing member 113 and the inner peripheral wall of the valve body 111 is larger, so that the sealing performance is better), when the air pressure in the air inlet cavity 11113 is greater than or equal to the preset value, since the main body 1131 is not provided with the concave portion 1133, the side of the main body 1131 facing away from the valve core 112 can still be in sealing connection with the inner peripheral wall of the valve body 111, which is beneficial to improving the reliability of the main liquid feeding operation and the auxiliary liquid feeding operation.

In some embodiments, referring to fig. 5, the radial dimension of the body portion 1131 gradually decreases in a direction along the weakened portion 1132 toward the body portion 1131.

It can be appreciated that the radial dimension of the main body 1131 is gradually reduced, and when the valve core 112 is in the second working position or the third working position, the main body 1131 can be disposed on the inner peripheral wall of the valve body 111 in an interference manner, so that the sealing performance of the main body 1131 is better, which is beneficial to improving the reliability of the main liquid feeding operation and the auxiliary liquid feeding operation.

Specifically, referring to fig. 2, the inner peripheral wall of the valve body 111 includes a first step 1116 and a second step 1117 corresponding to the main body 1131. The first step portion 1116 and the second step portion 1117 are disposed at intervals along the 111 axis of the valve body, and in the radial direction of the valve body 112, the second step portion 1117 is closer to the valve body 112 than the first step portion 1116, when the valve body 112 is in the second working position, the main body portion 1131 of the fourth seal 113 is connected with the outer peripheral wall of the valve body 112 and the first step portion 1116, when the valve body 112 is in the third working position, the main body portion 1131 of the fourth seal 113 is connected with the outer peripheral wall of the valve body 112 and the second step portion 1117, so that the main body portion 1131 of the fourth seal 113 on the valve body 112 can move along the axial direction of the valve body 111 along with the valve body 112, and can move to the first step portion 1116 or the second step portion 1117 respectively, so that a reverse resistance is formed for the fourth seal 113 at the second working position and the third working position respectively, a reminding signal is given to an operator to stop the valve body 112 at the second working position or the third working position, reliability of operation is improved, and reliability of main liquid delivery and auxiliary liquid delivery operation is also improved.

In some embodiments, all of the first seals 115 and all of the second seals 116 are clamped to the outer peripheral wall of the spool 112, facilitating removal or replacement of the first seals 115 and/or the second seals 116 as desired.

An embodiment of the present application provides an endoscope flushing device 10, which includes the control valve 100, the air inlet pipe 200, the liquid supply container 300, the liquid inlet pipe 400, the air supply pipe 500, the main liquid supply pipe 600 and the auxiliary liquid supply pipe 700.

The endoscope flushing device 10 can alternatively perform an air supply operation, a main liquid supply operation, and a sub liquid supply operation.

As shown in fig. 1 and 2, when the endoscope flushing device 10 performs the air supply operation, the outlet provided in the air discharge passage 1121 may be blocked by a hand so that the air discharge passage 1121 is not communicated with the external environment, the air source introduces air into the housing chamber 1111 through the air inlet pipe 200 and the air inlet 1112, the air pressure in the air inlet chamber 11113 may be brought to a predetermined value, and further, a communication port may be defined between the fourth sealing member 113 and the inner peripheral wall of the valve body 111 so that the air inlet 1112 and the air supply port 1113 are communicated with each other, so that the air supply operation to the lens of the endoscope may be well performed.

As shown in fig. 1 and 3, when the endoscope flushing device 10 performs the main liquid feeding operation, the valve core 112 may be moved to the second working position along the axial direction of the valve body 111, for example, by pressing one end of the valve core 112 where the outlet of the air exhaust passage 1121 is provided, the valve core 112 may be moved downward along the axial direction of the valve body 111, so as to drive the first sealing member 115, all the second sealing members 116, the third sealing member 117, the fourth sealing member 113 and the fifth sealing member 118 to move downward along the axial direction of the valve body 111, the main body 1131 of the fourth sealing member 113 is sealingly connected to the first step 1116, so that the air inlet 1112 and the air supply 1113 are not communicated with each other, the first sealing member 115 moves into the first cavity 11111, so that the air inlet 1114 and the main liquid supply 131 are not communicated with each other, and, as a result, the air conveyed into the accommodating cavity 1111 through the air inlet pipe 200 may be discharged from the air inlet 1112 back into the air inlet pipe 200, and then may enter the accommodating cavity 301, the cleaning liquid in the accommodating cavity 301 may be pressurized and be conveyed into the main liquid inlet 1114 through the air supply inlet 1113 to the endoscope, so that the cleaning liquid can be cleaned.

As shown in fig. 1 and 4, when the endoscope flushing device 10 performs the secondary liquid feeding operation, the valve core 112 may be moved along the axial direction of the valve body 111 so that the valve core 112 may be moved from the second operation position to the third operation position, at this time, the main body 1131 of the fourth sealing member 113 may be sealingly connected to the second step 1117 so that the air inlet 1112 and the air outlet 1113 are not in communication with each other, the first sealing member 115 may be located in the first cavity 11111, the liquid inlet 1114 may be in communication with the secondary liquid inlet 132, and the inlet of the main liquid inlet 131 may be located between the two second sealing members 116 adjacent to the first sealing member 115 so that the liquid inlet 1114 and the main liquid inlet 131 may not be in communication with each other, and thus, the gas in the housing cavity 1111 may be discharged back into the air inlet pipe 200, and may enter the housing cavity 301, and the cleaning liquid in the housing cavity 301 may be pressure-fed to the liquid inlet 1114, and may be further conveyed to the focus of the endoscope through the secondary liquid inlet 132 and the secondary liquid pipe 700, so as to clean the focus of the endoscope.

In summary, the endoscope flushing device 10 of the present application can alternatively perform an air supply operation to the lens of the endoscope, clean the lens of the endoscope, and clean the focus where the lens of the endoscope is located.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (13)

1. A control valve for an endoscopic irrigation device (10), the control valve (100) comprising:

A valve body (111) having a housing chamber (1111), wherein an air inlet (1112), an air supply port (1113), a liquid inlet (1114), a main liquid supply port (131) and a sub liquid supply port (132) are provided on the valve body (111);

A valve element (112) movably inserted into the housing chamber (1111) along the axial direction of the valve body (111);

Wherein the valve core (112) is provided with a first working position, a second working position and a third working position which are arranged at intervals along the axial direction of the valve body (111); when the spool (112) is in the first operating position, the spool (112) is configured to operably communicate the air inlet (1112) and the air bleed (1113); when the valve core (112) is in the second working position, the liquid inlet (1114) and the main liquid outlet (131) are communicated with each other, and the air inlet (1112) and the air outlet (1113) are not communicated with each other; when the valve core (112) is in the third working position, the liquid inlet (1114) and the auxiliary liquid outlet (132) are communicated with each other, and the air inlet (1112) and the air outlet (1113) are not communicated with each other.

2. The control valve according to claim 1, characterized in that the control valve (100) further comprises a first seal (115) provided to an outer peripheral wall of the spool (112);

When the valve core (112) is in the first working position, along the axial direction of the valve body (111), the first sealing piece (115) is positioned between the liquid inlet (1114) and the main liquid outlet (131), and the first sealing piece (115) is in sealing connection between the outer peripheral wall of the valve core (112) and the inner peripheral wall of the valve body (111), so that the main liquid outlet (131) and the auxiliary liquid outlet (132) are not communicated with the liquid inlet (1114) respectively.

3. The control valve according to claim 2, characterized in that the first seal (115) is spaced from the inner peripheral wall of the valve body (111) in the radial direction of the spool (112) when the spool (112) is in the second working position, and the liquid inlet (1114) and the main liquid feed (131) communicate with each other.

4. The control valve according to claim 2, characterized in that the control valve (100) further comprises two second seals (116) provided at intervals from the first seal (115) in the axial direction of the spool (112);

When the valve core (112) is in the second working position, the second sealing member (116) is connected between the outer peripheral wall of the valve core (112) and the inner peripheral wall of the valve body (111) in a sealing manner, and the auxiliary liquid delivery port (132) is positioned between the two second sealing members (116) so that the liquid inlet (1114) and the auxiliary liquid delivery port (132) are not communicated with each other.

5. The control valve of claim 4, wherein the spool (112) has a communication passage (1122);

When the valve core (112) is in the third working position, the liquid inlet (1114) is communicated with the auxiliary liquid outlet (132) through the communication channel (1122), the second sealing members (116) are all connected between the outer peripheral wall of the valve core (112) and the inner peripheral wall of the valve body (111) in a sealing manner, and the main liquid outlet (131) is positioned between the two second sealing members (116) so that the liquid inlet (1114) and the main liquid outlet (131) are not communicated with each other.

6. The control valve according to claim 4, characterized in that the control valve (100) further comprises a third seal (117) provided at a distance from the two second seals (116) in the axial direction of the spool (112); the third sealing element (117) is blocked between the air inlet (1112) and the liquid inlet (1114), between the air inlet (1112) and the main liquid outlet (131), and between the air inlet (1112) and the auxiliary liquid outlet (132), so that the air inlet (1112) is not communicated with the liquid inlet (1114), the main liquid outlet (131) and the auxiliary liquid outlet (132) respectively.

7. The control valve according to any one of claims 1-6, characterized in that the housing chamber (1111) comprises an air inlet chamber (11113) communicating with the air inlet (1112);

The control valve (100) further comprises a fourth sealing member (113), wherein the fourth sealing member (113) is connected between the outer peripheral wall of the valve core (112) and the inner peripheral wall of the valve body (111), and is configured to define a communication port with the inner peripheral wall of the valve body (111) to communicate the air inlet (1112) with the air outlet (1113) when the air pressure in the air inlet chamber (11113) is greater than or equal to a preset value.

8. The control valve of claim 7, wherein the valve spool (112) has an exhaust passage (1121) in communication with the intake chamber (11113), the valve spool (112) being configured to operably seal an outlet of the exhaust passage (1121) to enable the air pressure within the intake chamber (11113) to reach the preset value.

9. The control valve according to claim 8, characterized in that the fourth seal (113) comprises a main body portion (1131) and a weakened portion (1132) connected in the axial direction of the valve body (111);

The main body (1131) is arranged on the outer peripheral wall of the valve core (112), and the main body (1131) is used for being connected with the inner peripheral wall of the valve body (111) in a sealing way so that the air inlet (1112) and the air outlet (1113) are not communicated with each other;

The weak portion (1132) deviates from the main body portion (1131), one side of the weak portion (1132) is provided with a concave portion (1133), the concave portion (1133) is concave towards one side close to the main body portion (1131) along the axial direction of the valve core (112), so that the weak portion (1132) can be separated from the inner peripheral wall of the valve body (111) when the air pressure in the air inlet cavity (11113) is larger than or equal to a preset value, and the communication port is defined.

10. The control valve according to claim 9, characterized in that the radial dimension of the main body portion (1131) gradually decreases in a direction along the weakened portion (1132) directed towards the main body portion (1131).

11. The control valve according to claim 9, characterized in that, when the spool (112) is in the second or third operating position, a side of the main body portion (1131) facing away from the spool (112) is sealingly connected to an inner peripheral wall of the valve body (111) so that the air intake (1112) and the air delivery (1113) do not communicate with each other.

12. An endoscopic flushing device, characterized by comprising a control valve (100) according to any one of claims 1-11.

13. The endoscopic flushing device according to claim 12, wherein the endoscopic flushing device (10) further comprises:

an air inlet pipe (200) for supplying air to the lens of the endoscope; the air inlet pipe (200) is communicated with the air inlet (1112);

a liquid supply container (300) having a containing chamber (301) for containing a cleaning liquid, the air intake pipe (200) being in communication with the containing chamber (301); and

A liquid inlet pipe (400) for supplying cleaning liquid to the lens of the endoscope; one end of the liquid inlet pipe (400) stretches into the cleaning liquid in the accommodating cavity (301), and the other end of the liquid inlet pipe (400) is communicated with the liquid inlet (1114).