CN220860048U - Suction valve for endoscope and endoscope - Google Patents

Abstract

The present utility model relates to an aspiration valve for an endoscope and an endoscope, which can keep the whole aspiration path unobstructed so as to more easily aspirate and draw blood clots or tissues. The suction valve for the endoscope comprises a valve shell, a valve core and a poking piece. The valve housing has a valve cavity, an air inlet in communication with the valve cavity, an intake inlet, and an intake outlet. The valve core is slidably arranged in the valve cavity. The stirring piece is in driving connection with the valve core; when the stirring piece is stirred to drive the valve core to slide upwards relative to the valve shell, the valve core slides away from a channel between the suction inlet and the suction outlet to dredge a suction passage, and the channel between the air inlet and the suction outlet is blocked to block an air inlet passage; when the toggle member is toggled to drive the valve core to slide downwards relative to the valve housing, the valve core slides into a channel between the suction inlet and the suction outlet to block the suction passage, and opens the channel between the air inlet and the suction outlet to conduct the air inlet passage.

Description

Suction valve for endoscope and endoscope

Technical Field

The utility model relates to the technical field of endoscopes, in particular to an attraction valve for an endoscope and the endoscope.

Background

In recent years, with the rapid development of smart medical treatment, medical endoscopes have been increasingly used in the medical field, such as an endoscope applied to bronchi or abdominal cavities. It is well known that an endoscope handle is generally provided with a suction channel, and a suction valve is designed on the suction channel for sucking body fluid, blood clots, secretions and the like during operation.

At present, the suction valve adopted by the endoscope handle in the market is generally complex in internal structure, high in development cost and unsmooth in suction channel, and blockage can occur in actual use, and especially when blood clots or human tissues enter the suction channel, the normal operation is easily influenced. For example, there is a conventional suction button for an endoscope: when the operator does not press the suction button to be in a non-suction state, the plunger is closed, the suction outlet is connected with the suction device to form negative pressure, and the suction device sucks external gas at the moment; when an operator presses the suction button to be in a suction state, the air inlet of the silica gel cap is blocked, and the plunger integrally connected with the silica gel cap moves downwards, so that the suction inlet is opened, and at the moment, the body fluid, the blood clot, the secretion or the like is sucked by the suction device.

However, the suction path of the conventional suction valve is closed in a non-suction state and is opened in a suction state, but the whole suction path has the problems of multiple bending and uneven smoothness, blood clots, sputum and other objects are easy to block, and great inconvenience and potential safety hazards are caused to the use of the endoscope.

Disclosure of utility model

An advantage of the present utility model is to provide an endoscopic suction valve and endoscope that can maintain the entire suction path clear for easier suction of blood clots or tissue.

Another advantage of the present utility model is to provide an aspiration valve for an endoscope and an endoscope, in which in one embodiment of the present utility model, the aspiration valve for an endoscope can shorten the length of an aspiration channel so as to smoothly perform an aspiration function of the aspiration valve.

Another advantage of the present utility model is to provide an aspiration valve for an endoscope and an endoscope, in which in one embodiment of the present utility model, the aspiration valve for an endoscope can open an aspiration inlet by moving a central shaft upward, avoiding the central shaft from occupying an aspiration channel when aspirating, so as to better aspirate internal fluids such as body fluids, blood clots, or secretions.

Another advantage of the present utility model is to provide an endoscopic suction valve and an endoscope in which, in one embodiment of the present utility model, the endoscopic suction valve can use a cam mechanism to move a center shaft upward so as to open a suction inlet with little effort and stability.

Another advantage of the present utility model is to provide an aspiration valve for an endoscope and an endoscope in which expensive materials or complex structures are not required in the present utility model in order to achieve the above-described objects. The present utility model thus successfully and efficiently provides a solution that not only provides a simple suction valve for endoscopes and endoscope, but also increases the practicality and reliability of the suction valve for endoscopes and endoscope.

To achieve at least one of the above or other advantages and objects of the present utility model, there is provided an aspiration valve for an endoscope including:

the valve comprises a valve housing, a valve cavity, an air inlet, an attracting inlet and an attracting outlet, wherein the air inlet is communicated with the upper part of the valve cavity;

the valve core is slidably arranged in the valve cavity so as to form an on-off suction passage between the suction inlet and the suction outlet and form an on-off air inlet passage between the air inlet and the suction outlet; and

The stirring piece is in driving connection with the valve core; when the poking piece is poked to drive the valve core to slide upwards relative to the valve shell, the valve core slides away from a channel between the suction inlet and the suction outlet to unblock the suction passage, and blocks the channel between the air inlet and the suction outlet to block the air inlet passage; when the toggle member is toggled to drive the valve spool to slide downward relative to the valve housing, the valve spool slides into a passage between the suction inlet and the suction outlet to block the suction passage, and opens a passage between the intake port and the suction outlet to communicate the intake passage.

According to one embodiment of the application, the suction outlet is located on the valve housing adjacent to the suction inlet.

According to one embodiment of the application, the valve housing comprises a housing providing the suction inlet and the suction outlet, a cover providing the air inlet, and an adapter ring connecting the housing and the cover; the valve core comprises a central shaft and a sealing part convexly arranged on the central shaft, the central shaft slidably penetrates through the engagement ring and the cover body to be connected with the stirring piece, and the sealing part is arranged between the engagement ring and the shell.

According to one embodiment of the application, the adapter ring is bonded to the housing and the cover, respectively.

According to one embodiment of the application, the sealing part comprises a silica gel cap which is covered on the lower end part of the center shaft and a silica gel ring which is sleeved on the center shaft.

According to one embodiment of the application, the silica gel ring and the silica gel cap are arranged on the central shaft at intervals up and down.

According to one embodiment of the application, the valve cartridge further comprises an elastic member disposed between the center shaft and the valve housing for applying an elastic force to the center shaft toward the suction inlet.

According to one embodiment of the application, the center shaft comprises a columnar shaft body, an inverted cone table integrally connected with the lower end of the columnar shaft body, and a front cone table protruding from the outer peripheral surface of the columnar shaft body, wherein the front cone table is positioned between the connection ring and the inverted cone table, the silica gel cap is sleeved on the inverted cone table, and the silica gel ring is sleeved on the front cone table.

According to one embodiment of the present application, the bottom bracket further includes an annular boss protruding outwardly from the outer peripheral surface of the cylindrical shaft body, the annular boss being located between the engagement ring and the cover body; the elastic piece is a pressure spring, one end of the pressure spring is abutted to the cover body, and the other end of the pressure spring is abutted to the annular boss.

According to one embodiment of the application, the toggle member includes a cam portion eccentrically rotatably coupled to the spool and a toggle lever portion extending outwardly from the cam portion.

According to another aspect of the present application, there is further provided an endoscope including:

An endoscope body; and

The suction valve for an endoscope according to any one of the above, wherein the suction valve for an endoscope is attached to the endoscope body.

Drawings

FIG. 1 is a schematic view of an endoscope according to an embodiment of the present utility model;

Fig. 2 is a schematic view showing a structure of an attraction valve for an endoscope in an endoscope according to the above embodiment of the present utility model;

Fig. 3 shows an exploded schematic view of an aspiration valve for an endoscope according to the above-described embodiment of the present utility model;

Fig. 4 is a schematic cross-sectional view showing an aspiration valve for an endoscope according to the above embodiment of the present utility model in a non-aspiration state;

Fig. 5 is a schematic cross-sectional view showing the suction valve for an endoscope according to the above embodiment of the present utility model in a suction state.

Description of the reference numerals: 1. suction valve for endoscope; 10. a valve housing; 100. a valve cavity; 110. a suction passage; 120. an intake passage; 101. an air inlet; 102. a suction inlet; 103. a suction outlet; 11. a housing; 12. a cover body; 13. a linking ring; 20. a valve core; 21. a center shaft; 211. a columnar shaft body; 212. an inverted cone; 213. a front frustum; 214. an annular boss; 22. a sealing part; 221. a silica gel cap; 222. a silica gel ring; 23. an elastic member; 230. a pressure spring; 30. a toggle member; 31. a cam section; 32. a deflector rod part; 2. an endoscope body.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It is noted that when an element is referred to as being "disposed" or "mounted" 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 "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 "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

It will be appreciated by those skilled in the art that in the present disclosure, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms should not be construed as limiting the present utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "or/and" as used herein includes any and all combinations of one or more of the associated listed items.

Considering the problems that the whole suction path in the suction valve adopted by the existing endoscope handle is bent for many times and is uneven and unobstructed, blood clots or sputum and other objects are easy to block, and great inconvenience and potential safety hazard can be brought to the use of the endoscope. In order to solve the above problems, the present application proposes an aspiration valve for an endoscope and an endoscope capable of keeping the entire aspiration channel clear so as to more easily aspirate and draw blood clots or tissues.

Specifically, referring to fig. 1, one embodiment of the present utility model provides an endoscope, which may include an endoscope main body 2 and an endoscope suction valve 1 mounted to the endoscope main body. It will be appreciated that the endoscope body 2 referred to in the present utility model may be implemented as, but is not limited to, a medical endoscope so as to control the medical endoscope to switch between an aspiration state and a non-aspiration state by operating the aspiration valve 1 for an endoscope.

More specifically, as shown in fig. 2 to 5, the suction valve 1 for an endoscope may include a valve housing 10, a valve core 20, and a toggle member 30. The valve housing 10 has a valve chamber 100, an air inlet 101 communicating with an upper portion of the valve chamber 100, a suction inlet 102 communicating with a lower portion of the valve chamber 100, and a suction outlet 103 communicating with a middle portion of the valve chamber 100. The valve body 20 is slidably disposed in the valve chamber 100 to form an openable suction passage 110 between the suction inlet 102 and the suction outlet 103, and an openable intake passage 120 between the intake port 101 and the suction outlet 103. The toggle member 30 is drivingly connected to the valve core 20 for driving the valve core 20 to slide up and down relative to the valve housing 10. It is to be understood that the upper, middle and lower parts referred to in the present application refer only to the upper and lower positional relationship relative to each other along the sliding direction; in other words, the air inlet 101 is located above the suction outlet 103, and the suction inlet 102 is located below the suction outlet 103.

More specifically, as shown in fig. 5, when the toggle member 30 is toggled to drive the valve body 20 to slide upward with respect to the valve housing 10, the valve body 20 slides away from the passage between the suction inlet 102 and the suction outlet 103 to unblock the suction passage 110, and blocks the passage between the intake port 101 and the suction outlet 103 to block the intake passage 120. As shown in fig. 4, when the toggle member 30 is toggled to drive the valve body 20 to slide downward with respect to the valve housing 10, the valve body 20 slides into the passage between the suction inlet 102 and the suction outlet 103 to block the suction passage 110, and opens the passage between the intake port 101 and the suction outlet 103 to communicate with the intake passage 120.

It should be noted that, when the valve core 20 in the suction valve 1 for an endoscope of the present application is driven to slide upward, the valve core 20 slides away from the channel between the suction inlet 102 and the suction outlet 103, so that the suction channel 110 is dredged, and the channel between the suction outlet 103 and the suction inlet 102 is kept with a larger flow area, so that the suction channel 110 is prevented from being bent and/or uneven and unobstructed for many times due to the valve core 20 remaining in the channel between the suction inlet 102 and the suction outlet 103, and blood clots, sputum, and the like are prevented from blocking the suction channel 110. It will be appreciated that the suction outlet 103 of the suction valve 1 for an endoscope of the present application is adapted to be connected to a negative pressure suction device (not shown in the drawings) to form a negative pressure environment at the suction outlet 103; when the valve body 20 is driven to slide upward, the suction passage 110 is opened, and the air intake passage 120 is blocked to place the endoscope in a suction state; and when the valve body 20 is driven to slide downward, the suction passage 110 is blocked, and the air intake passage 120 is conducted to place the endoscope in a non-suction state.

Alternatively, as shown in fig. 2 to 5, the suction outlet 103 is located on the valve housing 10 adjacent to the suction inlet 102 such that the distance between the suction outlet 103 and the suction inlet 102 is smaller than the distance between the suction outlet 103 and the air inlet, contributing to shortening the length of the suction passage 110, facilitating reduction of the time during which the sucked object stays in the suction valve 1 for an endoscope, preventing clogging of the suction passage 110. In addition, the length of the channel between the suction inlet 102 and the suction outlet 103 is shortened, so that the valve core 20 can slide away from or into the channel only by sliding up and down a short distance, which helps to shorten the driving stroke of the toggle member 30.

As illustrated in fig. 2 to 5, the valve housing 10 may include a housing 11 providing the suction inlet 102 and the suction outlet 103, a cover 12 providing the air inlet 101, and an adapter ring 13 connecting the housing 11 and the cover 12; the valve core 20 may include a central shaft 21 and a sealing portion 22 protruding from the central shaft 21, wherein the central shaft 21 slidably penetrates the engagement ring 13 and the cover 12 to be connected to the toggle member 30, and the sealing portion 22 is located between the engagement ring 13 and the housing 11.

Thus, as shown in fig. 5, when the middle shaft 21 is driven by the toggle member 30 to slide upwards, the sealing portion 22 is driven by the middle shaft 21 to slide towards the engagement ring 13, so as to block the gap between the engagement ring 13 and the middle shaft 21, such that the air inlet passage 120 is blocked; at the same time, the sealing portion 22 slides away from the channel between the suction inlet 102 and the suction outlet 103, so that the suction passage 110 is opened to allow the endoscope to be in a suction state, which is advantageous in preventing clogging of blood clots, sputum, or the like during suction.

In addition, as shown in fig. 4, when the middle shaft 21 is driven by the toggle member 30 to slide downwards, the sealing portion 22 is driven by the middle shaft 21 to slide away from the engagement ring 13, so as to open a gap between the engagement ring 13 and the middle shaft 21, such that the air inlet passage 120 is conducted; at the same time, the sealing portion 22 slides into the channel between the suction inlet 102 and the suction outlet 103, so that the suction passage 110 is blocked to put the endoscope in a non-suction state.

Optionally, the adapter ring 13 is adhered to the housing 11 and the cover 12, respectively, to assemble the valve core 20 into the valve cavity 100 of the valve housing 10. It will be appreciated that the adapter ring 13, housing 11 and cover 12 of the present application may be sealed by glue.

It should be noted that the housing 11, the cover 12 and the adapter ring 13 may be implemented as plastic parts, but not limited to, in order to reduce the overall weight of the suction valve 1 for endoscope; the central shaft 21 may be, but is not limited to, implemented as a metal piece in order to increase the structural strength and anti-friction properties of the central shaft 21, contributing to the extension of the service life of the suction valve 1 for endoscopes; the sealing portion 22 may be implemented, but is not limited to, as a silicone member so as to better block the suction passage 110 or the intake passage 120.

Alternatively, as shown in fig. 3 to 5, the sealing part 22 may include a silicone cap 221 covering the lower end of the bottom bracket 21 and a silicone ring 222 sleeved on the bottom bracket 21. Thus, when the middle shaft 21 is driven by the toggle member 30 to slide upwards, the silica gel ring 222 of the sealing portion 22 is driven by the middle shaft 21 to close the gap between the adapter ring 13 and the middle shaft 21, so that the air inlet passage 120 is blocked; at the same time, the silicone cap 221 of the sealing portion 22 slides away from the channel between the suction inlet 102 and the suction outlet 103, so that the suction passage 110 is unblocked. In addition, when the middle shaft 21 is driven by the toggle member 30 to slide downwards, the silica gel ring 222 of the sealing portion 22 is driven by the middle shaft 21 to slide away from the engagement ring 13, so that the air inlet passage 120 is conducted; at the same time, the silicone cap 221 of the sealing part 22 slides into the channel between the suction inlet 102 and the suction outlet 103 to block the suction inlet 102, so that the suction passage 110 is blocked.

Optionally, the silicone ring 222 and the silicone cap 221 are disposed at the bottom of the central shaft 21 at intervals, so as to further shorten the vertical sliding distance of the central shaft 21 and reduce the driving difficulty of the toggle member 30.

Alternatively, as shown in fig. 3 to 5, the valve core 20 may further include an elastic member 23, the elastic member 23 being disposed between the center shaft 21 and the valve housing 10 for applying an elastic force to the center shaft 21 toward the suction inlet 102. Thus, when the toggle member 30 is not toggled, the center shaft 21 is biased downward under the elastic action of the elastic member 23, so that the silicone cap 221 of the sealing portion 22 better seals the suction inlet 102, ensuring that the suction passage 110 is blocked, until the toggle member 30 is toggled to drive the center shaft 21 to move upward against the elastic force, so as to facilitate conforming to the suction scene of the endoscope, and avoiding the problem of erroneous suction caused by the suction passage 110 being inadvertently or accidentally unblocked.

Alternatively, as shown in fig. 3 to 5, the elastic member 23 may be, but not limited to, a compression spring 230 implemented to be sleeved on the central shaft 21, an upper end of the compression spring 230 abutting against the cover 12 of the valve housing 10, a lower end of the compression spring 230 abutting against the central shaft 21, so as to apply a downward elastic force to the central shaft 21 through the compression spring 230. It will be appreciated that in other examples of the application, the elastic member 23 may also be embodied as a tension spring; alternatively, the elastic member 23 may be replaced by a magnetic member, so long as a downward force can be applied to the central shaft 21, which will not be described in detail in the present application.

Alternatively, as shown in fig. 4 and 5, the center shaft 21 includes a cylindrical shaft body 211, an inverted cone 212 integrally connected to a lower end of the cylindrical shaft body 211, and a positive cone 213 protruding from an outer circumferential surface of the cylindrical shaft body 211; the front cone 213 is located between the adapter ring 13 and the back cone 212, and the silica gel cap 221 is sleeved on the back cone 212, so as to prevent the silica gel cap 221 from falling off from the center shaft 21 while better blocking the suction inlet 102; the silica gel ring 222 is sleeved on the front cone 213, so as to prevent the silica gel ring 222 from sliding on the center shaft 21 while better blocking the gap between the center shaft 21 and the engagement ring 13.

Optionally, as shown in fig. 4 and 5, the central shaft 21 further includes an annular boss 214 protruding outwards from the outer peripheral surface of the cylindrical shaft body 211, and the annular boss 214 is located between the engagement ring 13 and the cover body 12, so as to abut against the lower end of the pressure spring 230, so as to reduce the difficulty in assembling the suction valve 1 for an endoscope.

According to the above-described embodiment of the present application, as shown in fig. 2 to 5, the toggle member 30 may include a cam portion 31 eccentrically rotatably coupled with the valve core 20 and a toggle lever portion 32 extending outwardly from the cam portion 31. Thus, when the lever portion 32 is shifted to drive the cam portion 31 to rotate relative to the central shaft 21, the cam portion 31 rolls on the valve housing 10 to drive the central shaft 21 to slide upwards or downwards, thereby dredging or blocking the suction passage 110 and blocking or conducting the intake passage 120.

Alternatively, as shown in fig. 4 and 5, the upper end of the cylindrical shaft body 211 of the center shaft 21 is eccentrically pivoted to the cam portion 31, so that the cam portion 31 can pivot around the upper end of the cylindrical shaft body 211 under the driving of the lever portion 32, thereby enabling the center shaft 21 to slide up and down with respect to the valve housing 10 by means of the distance of the cam mechanism, and thus realizing the switching of the endoscope between the suction state and the non-suction state.

To sum up, as shown in fig. 5, when the lever portion 32 is pushed forward, the cam portion 31 rotates relative to the upper end of the central shaft 21 to roll clockwise on the cover 12 of the valve housing 10, so that the distance between the rotation center of the cam portion 31 and the cover 12 increases to drive the central shaft 21 to slide upwards; at this time, the silicone cap 221 slides away from the suction inlet 102 under the driving of the central shaft 21 and leaves the channel between the suction inlet 102 and the suction outlet 103, so that the suction passage 110 is dredged, and thus the fluid (such as body fluid, secretion or organ fragments, etc.) in the body can sequentially flow through the suction inlet 102 and the suction outlet 103 to be sucked to the negative pressure suction apparatus, and perform the required suction operation; the silica gel ring 222 slides to the adapter ring 13 under the driving of the central shaft 21 to block the gap between the adapter ring 13 and the central shaft 21, so that the air inlet passage 120 is blocked; the compression spring 230 is compressed by the center shaft 21 to accumulate elastic potential energy.

In addition, as shown in fig. 4, when the lever portion 32 is reversely moved, the cam portion 31 rotates with respect to the upper end of the central shaft 21 to roll counterclockwise on the cover 12 of the valve housing 10, so that the distance between the rotation center of the cam portion 31 and the cover 12 is reduced to drive the central shaft 21 to slide downward; at this time, the silicone cap 221 slides towards the suction inlet 102 under the driving of the central shaft 21 to block the suction inlet 102, so that the suction passage 110 is blocked, and the suction operation is stopped; the silicone ring 222 slides away from the adapter ring 13 under the driving of the central shaft 21 to open the gap between the adapter ring 13 and the central shaft 21, so that the air inlet passage 120 is conducted, and thus external air can sequentially flow through the air inlet 101, the gap between the adapter ring 13 and the central shaft 21, and the suction outlet 103 to be sucked to the negative pressure suction apparatus. In particular, the compression spring 230 will release elastic potential energy during this process, and even if the lever portion 32 is not continuously pushed back, the center shaft 21 can automatically slide downward under the elastic action of the compression spring 230 so that the silicone cap 221 well seals the suction inlet 102.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above 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 foregoing examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. 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 utility model, which are all within the scope of the utility model.

Claims (10)

1. Suction valve for endoscope, characterized by comprising:

the valve comprises a valve housing, a valve cavity, an air inlet, an attracting inlet and an attracting outlet, wherein the air inlet is communicated with the upper part of the valve cavity;

the valve core is slidably arranged in the valve cavity so as to form an on-off suction passage between the suction inlet and the suction outlet and form an on-off air inlet passage between the air inlet and the suction outlet; and

The stirring piece is in driving connection with the valve core; when the poking piece is poked to drive the valve core to slide upwards relative to the valve shell, the valve core slides away from a channel between the suction inlet and the suction outlet to unblock the suction passage, and blocks the channel between the air inlet and the suction outlet to block the air inlet passage; when the toggle member is toggled to drive the valve spool to slide downward relative to the valve housing, the valve spool slides into a passage between the suction inlet and the suction outlet to block the suction passage, and opens a passage between the intake port and the suction outlet to communicate the intake passage.

2. The suction valve for an endoscope according to claim 1, wherein said suction outlet is located on said valve housing adjacent to said suction inlet.

3. The suction valve for an endoscope according to claim 1, wherein said valve housing comprises a housing providing said suction inlet and said suction outlet, a cover providing said air inlet, and an adapter ring connecting said housing and said cover; the valve core comprises a central shaft and a sealing part convexly arranged on the central shaft, the central shaft slidably penetrates through the engagement ring and the cover body to be connected with the stirring piece, and the sealing part is arranged between the engagement ring and the shell.

4. The suction valve for an endoscope according to claim 3, wherein the sealing part comprises a silicone cap covering the lower end of the center shaft and a silicone ring fitted around the center shaft.

5. The suction valve for an endoscope according to claim 4, wherein the silicone ring and the silicone cap are disposed at an upper and lower interval in the center shaft.

6. The suction valve for an endoscope according to claim 4, wherein said valve cartridge further comprises an elastic member provided between said center shaft and said valve housing for applying an elastic force to said center shaft toward said suction inlet.

7. The suction valve for an endoscope according to claim 6, wherein the center shaft comprises a cylindrical shaft body, an inverted cone integrally connected with a lower end of the cylindrical shaft body, and a positive cone protruding from an outer circumferential surface of the cylindrical shaft body, the positive cone being located between the engagement ring and the inverted cone, the silicone cap being fitted over the inverted cone, and the silicone ring being fitted over the positive cone.

8. The suction valve for an endoscope according to claim 7, wherein said central shaft further comprises an annular boss protruding outwardly from said outer peripheral surface of said cylindrical shaft body, said annular boss being located between said engagement ring and said cover body; the elastic piece is a pressure spring, one end of the pressure spring is abutted to the cover body, and the other end of the pressure spring is abutted to the annular boss.

9. The attractive valve for an endoscope according to any one of claims 1 to 8, wherein the toggle member includes a cam portion eccentrically rotatably connected to the valve spool and a toggle lever portion extending outwardly from the cam portion.

10. An endoscope, comprising:

An endoscope body; and

The suction valve for an endoscope according to any one of claims 1 to 9, which is attached to the endoscope main body.