CN219353864U

CN219353864U - Pressure control structure and endoscope

Info

Publication number: CN219353864U
Application number: CN202223603272.XU
Authority: CN
Inventors: 易锋; 黎静; 张跃龙
Original assignee: Guangzhou Red Pine Medical Equipment Co ltd
Current assignee: Guangzhou Red Pine Medical Equipment Co ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-07-18
Anticipated expiration: 2032-12-29
Also published as: WO2024140584A1

Abstract

The utility model discloses a pressure control structure and an endoscope, wherein the pressure control structure is used for controlling the pressure in a body cavity and comprises a perfusion tube, a control valve and a driving unit, and the perfusion tube is provided with a conveying channel used for communicating a liquid inlet of the endoscope and a liquid outlet of a perfusion pump; the control valve is connected to the perfusion tube; the driving unit is connected with the control valve and is used for driving the control valve to adjust the flow of the liquid conveyed along the conveying channel. The pressure control structure and the endoscope can control the pressure in the body cavity more conveniently according to the requirement.

Description

Pressure control structure and endoscope

Technical Field

The utility model relates to the technical field of endoscopes, in particular to a pressure control structure and an endoscope.

Background

Medical endoscopes have been widely used in various departments for examination, and the sites reached by the medical endoscopes in the body cavity can be classified into otorhinolaryngoscopes, gastroenteroscopes, ureteroscopes, arthroscopes and the like. Ureteroscope technology is increasingly applied to clinic, has become an indispensable part of urology surgery, and has the advantages of small damage, simple and convenient operation, quick postoperative recovery and the like.

In ureteroscope operation, pour into normal saline to the body cavity into can keep the field of vision clear for operation progress, avoid the operation to harm surrounding tissue, can prop up the cavity simultaneously, maintain the required space of operation. Because of the physiological pressure of each organ of human body, the filling amount of physiological saline is also required.

When using ureteroscope in traditional operation in-process, to the body cavity in filling normal saline by the perfusion pump completion, the perfusion pressure needs the special man to adjust at any time according to the demand, perhaps adopts the pressure measurement part to survey the pressure in the body cavity, utilizes the data automatic control perfusion pump that surveys to adjust the perfusion pressure, comparatively loaded down with trivial details and the reliability is low.

Disclosure of Invention

Based on this, to using ureteroscope in traditional operation in-process, to the normal saline that fills to the body cavity accomplish by the perfusion pump, the pressure that fills needs special personnel to adjust at any time according to the demand, perhaps adopts the pressure measurement part to survey the pressure in the body cavity, utilizes the data automatic control that surveys to fill the pump and adjusts the pressure that fills, comparatively loaded down with trivial details and the low problem of reliability, has proposed a accuse pressure structure and endoscope, this accuse pressure structure and endoscope can control the pressure in the body cavity more conveniently as required.

The specific technical scheme is as follows:

in one aspect, the present application relates to a pressure control structure for controlling pressure in a body cavity, the pressure control structure comprising a perfusion tube, a control valve and a driving unit, the perfusion tube being provided with a delivery channel for communicating a liquid inlet of an endoscope with a liquid outlet of a perfusion pump; the control valve is connected to the perfusion tube; the driving unit is connected with the control valve and is used for driving the control valve to adjust the flow of the liquid conveyed along the conveying channel.

The technical scheme is further described as follows:

in one embodiment, the control valve is movably connected with the pouring tube, and the control valve at least partially extends into the conveying channel from the outside of the pouring tube, and defines a first adjusting channel with the inner wall of the conveying channel, and the driving unit can drive the control valve to movably adjust the flux of the first adjusting channel relative to the pouring tube so as to adjust the flow of the liquid conveyed along the conveying channel.

In one embodiment, the control valve comprises a valve core, a first mounting hole is formed in the circumferential pipe wall of the filling pipe, the valve core extends into the conveying channel through the first mounting hole and defines a first adjusting channel with the inner wall of the conveying channel, and the valve core is connected with the driving unit so as to move relative to the filling pipe under the driving of the driving unit.

In one embodiment, the driving unit comprises a transmission shaft, a motor and a speed reducing mechanism, the transmission shaft is provided with a first thread structure, the valve core is provided with a second thread structure, the first thread structure is in spiral fit with the second thread structure, and an output shaft of the motor is connected with the transmission shaft through the speed reducing mechanism so as to drive the valve core to move relative to the pouring tube when the output shaft of the motor rotates.

In one embodiment, the filling pipe is further provided with a bypass channel, a liquid inlet of the bypass channel and a liquid outlet of the bypass channel are both communicated with the conveying channel, and the first adjusting channel is arranged between the liquid inlet of the bypass channel and the liquid outlet of the bypass channel in the liquid conveying direction along the conveying channel;

the pressure control structure further comprises a manual dredging valve, wherein the manual dredging valve is connected to the filling pipe and used for controlling the bypass channel to be conducted and closed.

In one embodiment, the conveying channel comprises a first section channel and a second section channel which are distributed along the liquid conveying direction of the conveying channel, the control valve is provided with a second adjusting channel, and the first section channel is communicated with the second section channel through the second adjusting channel;

the drive unit is capable of driving the control valve to adjust the flux between the second adjustment channel and the first and/or second section channels to adjust the flow rate of the liquid delivered to the second section channel along the first section channel; alternatively, the drive unit can drive the control valve to adjust the flux of the second adjustment passage itself to adjust the flow rate of the liquid delivered to the second-stage passage along the first-stage passage.

In one embodiment, the control valve comprises an elastic member formed with the second adjustment channel, and the driving unit is configured to apply a force to the elastic member, so that the elastic member deforms to adjust the flux of the second adjustment channel itself.

In one embodiment, the driving unit comprises an extrusion part, a transmission shaft, a motor and a speed reducing mechanism, wherein the extrusion part is connected with the transmission shaft, and an output shaft of the motor is connected with the transmission shaft through the speed reducing mechanism so as to drive the extrusion part to extrude the elastic piece when the output shaft of the motor rotates.

In one embodiment, the transmission shaft is provided with a first thread structure, a second thread structure is arranged on one side, away from the elastic piece, of the extrusion piece, the first thread structure is in spiral fit with the second thread structure, and the extrusion piece can be driven to move and extrude the elastic piece by rotation of an output shaft of the motor.

In one embodiment, the pressing member is a cam, and the rotation of the output shaft of the motor can drive the cam to rotate and press the elastic member.

In one embodiment, the control valve includes a rotating member, the rotating member is provided with the second adjustment channel, the second adjustment channel is provided with a first opening for communicating with the first section channel and a second opening for communicating with the second section channel, and the rotating member is connected with the driving unit so as to rotate relative to the first section channel and the second section channel under the driving of the driving unit, and the rotating member adjusts the flux between the first opening and the first section channel and the flux between the second opening and the second section channel through rotation.

In one embodiment, the filling pipe is formed with a mounting space with two open ends and hollow inside along the radial direction of the conveying channel, the first section channel and the second section channel are arranged on two sides of the mounting space, the rotating piece extends into the mounting space from one of the openings and extends out of the mounting space from the other opening to be connected with the driving unit, and the control valve further comprises a cover body, wherein the cover body covers the one of the openings.

In one embodiment, the driving unit includes a transmission shaft, a motor and a speed reducing mechanism, the rotating member is connected with the transmission shaft, and an output shaft of the motor is connected with the transmission shaft through the speed reducing mechanism, so as to drive the rotating member to rotate when the output shaft of the motor rotates.

In one embodiment, a second mounting hole is formed in one side, away from the cover body, of the rotating piece, and the transmission shaft is inserted into the second mounting hole.

In one embodiment, the filling pipe is further provided with a bypass channel, a liquid inlet of the bypass channel and a liquid outlet of the bypass channel are both communicated with the conveying channel, and the second adjusting channel is arranged between the liquid inlet of the bypass channel and the liquid outlet of the bypass channel in the liquid conveying direction along the conveying channel;

In one embodiment, the pressure control structure further comprises a manual stop valve, and the manual stop valve is connected to the filling pipe and used for controlling the connection and the disconnection of the conveying channel.

In another aspect, the present application is directed to an endoscope comprising a pressure control structure of any of the embodiments described above.

When the pressure control structure and the endoscope are used, the liquid inlet of the endoscope and the liquid outlet of the perfusion pump are communicated through the perfusion pipe, and the perfusion liquid is conveyed to the liquid inlet of the endoscope through the perfusion pipe under the pumping action of the perfusion pump, so that the perfusion liquid is conveyed into a body cavity; because the control valve is connected in the perfusion tube, the control valve is used for controlling the flow of liquid output along the conveying channel, and then a user can utilize the driving unit to drive the flow of liquid output by the control valve adjustment conveying channel as required when using, and then can realize controlling the pressure in the body cavity, and the flow of perfusion liquid and the pressure adjustment in the body cavity are more convenient.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly explain the drawings used in the embodiments, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Moreover, the figures are not drawn to a 1:1 scale, and the relative sizes of various elements are merely exemplary in the figures, and are not necessarily drawn to true scale.

FIG. 1 is a schematic diagram of a pressure control structure in one embodiment;

FIG. 2 is a schematic diagram of a pressure control structure according to another embodiment;

FIG. 3 is a schematic diagram of a pressure control structure according to another embodiment;

fig. 4 is a schematic structural diagram of a pressure control structure in another embodiment.

Reference numerals illustrate:

10. a pressure control structure; 100. a perfusion tube; 110. a conveying channel; 112. a first section of passage; 114. a second section of channel; 200. a control valve; 210. a valve core; 212. a first tuning passage; 220. a second tuning passage; 230. an elastic member; 240. a rotating member; 250. a cover body; 300. a driving unit; 310. a transmission shaft; 320. a motor; 330. an extrusion; 340. a mounting member; 342. a mounting cavity; 400. a bypass passage; 500. a manual dredging valve; 600. and (3) switching the valve.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model 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 utility model. The present utility model 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 utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, 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 utility model 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 utility model.

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 utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

The medical endoscope is widely applied to examination of various departments, and has the advantages of small damage, simple and convenient operation, quick postoperative recovery and the like. The parts reached by the medical endoscope in the human body cavity can be classified into otorhinolaryngoscopes, gastroenteroscopes, ureteroscopes, arthroscopes and the like. Ureteroscope technology is increasingly applied to clinic, has become the indispensable part of urology surgery, and in ureteroscope operation, the normal saline that fills into the body cavity can keep the field of vision clear for the operation process, avoids operation damage surrounding tissue, can prop up the cavity simultaneously, maintains the required space of operation.

Based on this, this application provides a accuse pressure structure and endoscope, and this accuse pressure structure and endoscope can more conveniently control the pressure in the body cavity as required.

The endoscope comprises an endoscope handle, a liquid inlet of the endoscope is formed in the endoscope handle, the perfusion pump conveys perfusion liquid into the body cavity through the liquid inlet of the endoscope, the endoscope further comprises a pressure control structure, and the pressure in the body cavity is controlled through the pressure control structure.

Referring to fig. 1 to 4, the pressure control structure 10 includes an infusion tube 100, a control valve 200 and a driving unit 300, wherein the infusion tube 100 is provided with a delivery channel 110 for communicating a liquid inlet of an endoscope and a liquid outlet of an infusion pump, and the control valve 200 is connected to the infusion tube 100. The driving unit 300 is connected to the control valve 200 for driving the control valve 200 to adjust the flow rate of the liquid transferred along the transfer passage 110.

Referring to fig. 1 to 4, when the pressure control structure 10 is in use, a liquid inlet of an endoscope and a liquid outlet of a perfusion pump are communicated through a perfusion tube 100, and perfusion liquid is conveyed to the liquid inlet of the endoscope through the perfusion tube 100 under the pumping action of the perfusion pump, and then conveyed into a body cavity; because the control valve 200 is connected to the perfusion tube 100, the control valve 200 is used for controlling the flow rate of the liquid output along the conveying channel 110, so that when a user uses the driving unit 300 to drive the control valve 200 to adjust the flow rate of the liquid output by the conveying channel 110 according to the needs, and further, the pressure in the body cavity can be controlled, and the flow rate of the perfusion liquid and the pressure in the body cavity can be adjusted more conveniently.

Referring to fig. 1, in some embodiments, the control valve 200 is movably connected to the filling tube 100, and the control valve 200 extends out of the filling tube 100 into the delivery channel 110 at least partially, and defines a first adjustment channel 212 with an inner wall of the delivery channel 110, and the driving unit 300 is capable of driving the control valve 200 to movably adjust a flux of the first adjustment channel 212 relative to the filling tube 100 so as to adjust a flux of the liquid delivered along the delivery channel 110.

The flux of the first adjustment channel 212 refers to the volume of the perfusate that is delivered to the liquid inlet of the endoscope along the first adjustment channel 212 in a unit time. The greater the flux, the less the portion of the control valve 200 that extends into the irrigation tube 100, the greater the volume of irrigation fluid delivered to the inlet of the endoscope along the first adjustment channel 212 per unit time, whereas the smaller the flux, the more the portion of the control valve 200 that extends into the irrigation tube 100, the less the volume of irrigation fluid delivered to the inlet of the endoscope along the first adjustment channel 212 per unit time.

Referring to fig. 1, in particular to one embodiment, the control valve 200 includes a valve core 210, a first mounting hole is provided on a circumferential wall of the filling tube 100, the valve core 210 extends into the conveying channel 110 through the first mounting hole and defines a first adjusting channel 212 with an inner wall of the conveying channel 110, and the valve core 210 is connected to the driving unit 300 so as to move relative to the filling tube 100 under the driving of the driving unit 300.

Referring to fig. 1, a first adjustment channel 212 is defined between an end portion of the valve core 210 extending into the pouring tube 100 and an inner wall of the pouring tube 100 facing the end portion of the valve core 210, and the flux of the first adjustment channel 212 can be changed when the driving unit 300 drives the valve core 210 to move relatively in a direction approaching or moving away from the inner wall.

The valve element 210 may be movable relative to the infusion tube 100 either directly or rotationally. In other words, the driving unit 300 may be a linear driving mechanism or the driving unit 300 and the valve core 210 may be constructed like a screw nut structure.

For example, referring to fig. 1, in some embodiments, the driving unit 300 includes a driving shaft 310, a motor 320, and a speed reducing mechanism (not shown), the driving shaft 310 is provided with a first thread structure, the valve core 210 is provided with a second thread structure, the first thread structure is in screw fit with the second thread structure, and an output shaft of the motor 320 is connected to the driving shaft 310 through the speed reducing mechanism, so as to drive the valve core 210 to move relative to the pouring tube 100 when the output shaft of the motor 320 rotates.

A screw nut-like structure is formed between the transmission shaft 310 and the valve core 210, and when one of them rotates, the other moves forward while rotating. Specifically, the first thread structure may be an internal thread structure, and the second thread structure may be an external thread structure opposite to the internal thread structure; alternatively, the first thread structure may be an external thread structure, and the second thread structure may be an internal thread structure.

With continued reference to fig. 1, on the basis of the foregoing embodiment, the perfusion tube 100 is further provided with a bypass channel 400, and the liquid inlet of the bypass channel 400 and the liquid outlet of the bypass channel 400 are both communicated with the conveying channel 110, and in the direction of conveying the liquid along the conveying channel 110, as indicated by the direction L in fig. 1. The first adjusting channel 212 is disposed between the liquid inlet of the bypass channel 400 and the liquid outlet of the bypass channel 400. The pressure control structure 10 further comprises a manual dredging valve 500, wherein the manual dredging valve 500 is connected to the filling pipe 100 for controlling the connection and the disconnection of the bypass channel 400.

When the control valve 200 fails to allow the perfusate to be delivered into the body cavity through the control valve 200, the manual purge valve 500 is opened to open the bypass passage 400, so that the perfusate can be delivered into the body cavity along the bypass passage 400. When the control valve 200 is in a normal operation state, the manual dredging valve 500 is in a state of closing the bypass passage 400, and the perfusate is still delivered into the body cavity through the control valve 200.

The manual purge valve 500 may be any valve body capable of controlling a pipe switch in the prior art, for example, the manual purge valve 500 may be a shut-off valve.

Referring to fig. 2 to 4, in other embodiments, the delivery channel 110 includes a first segment channel 112 and a second segment channel 114 disposed along the liquid delivery direction L of the delivery channel 110, the control valve 200 is provided with a second adjusting channel 220, and the first segment channel 112 is communicated with the second segment channel 114 through the second adjusting channel 220.

In some embodiments, the drive unit 300 is capable of driving the control valve 200 to adjust the flux between the second tuning passage 220 and the first segment passage 112 and/or the second segment passage 114 to adjust the flow of liquid delivered along the first segment passage 112 to the second segment passage 114. Since the second adjustment channel 220 is disposed between the first section channel 112 and the second section channel 114, the perfusate delivered from the first section channel 112 to the second section channel 114 needs to pass through the second adjustment channel 220, and when the flux between the first section channel 112 and the second adjustment channel 220 is changed, the flux between the second section channel 114 and the second adjustment channel 220 is unchanged, or the flux between the first section channel 112 and the second adjustment channel 220 is unchanged, the flux change between the second adjustment channel 220 and the second section channel 114 affects the flow of the perfusate delivered into the body cavity along the second section channel 114.

In particular, the flux between the first segment passage 112 and the second tuning passage 220 may be varied by controlling the flux at the junction of the first segment passage 112 and the second tuning passage 220 by controlling the valve 200, for example by squeezing the junction to deform it by an external element. Similarly, the flux between the second segment passage 114 and the second tuning passage 220 may be varied by controlling the flux at the junction of the second segment passage 114 and the second tuning passage 220 by controlling the valve 200, for example, by squeezing the junction to deform by an external element.

Alternatively, in other embodiments, the drive unit 300 can drive the control valve 200 to adjust the flow of the second tuning passage 220 itself to adjust the flow of liquid delivered along the first stage passage 112 to the second stage passage 114. The manner of adjusting the flux of the second adjusting passage 220 itself may be to press the control valve 200 by an external element, thereby deforming the second adjusting passage 220 and thus realizing the adjustment of the flux of the second adjusting passage 220.

Referring to fig. 2 and 3, for example, in some embodiments, the control valve 200 includes an elastic member 230, the elastic member 230 is formed with a second adjustment channel 220, and the driving unit 300 is configured to apply a force to the elastic member 230, so that the elastic member 230 deforms to adjust the flux of the second adjustment channel 220.

The elastic member 230 may be an elastic pipe, and two ends of the elastic pipe are respectively sleeved with the outer wall of the first section of channel 112 and the outer wall of the second section of channel 114.

Referring to fig. 2 and 3, in some embodiments, the driving unit 300 includes a pressing member 330, a transmission shaft 310, a motor 320, and a reduction mechanism (not shown), the pressing member 330 is connected to the transmission shaft 310, and an output shaft of the motor 320 is connected to the transmission shaft 310 through the reduction mechanism, so that the pressing member 330 is driven to press the elastic member 230 when the output shaft of the motor 320 rotates.

The pressing member 330 may press the elastic member 230 by moving with respect to the elastic member 230, or may press the elastic member 230 by rotating with respect to the elastic member 230.

For example, referring to fig. 2, in some embodiments, the pressing member 330 is a cam, and the rotation of the output shaft of the motor 320 can rotate the cam and press the elastic member 230, thereby achieving the adjustment of the flux of the second adjustment channel 220.

For example, referring to fig. 3, in some embodiments, the transmission shaft 310 is provided with a first thread structure, and a side of the extrusion 330 facing away from the elastic member 230 is provided with a second thread structure, where the first thread structure is in screw engagement with the second thread structure, and the rotation of the output shaft of the motor 320 can drive the extrusion 330 to move and extrude the elastic member 230. The transmission shaft 310 and the extrusion 330 form a screw-nut-like structure, wherein the first thread structure may be an internal thread structure, and the second thread structure corresponding to the first thread structure may be an external thread structure; alternatively, the first thread structure may be an external thread structure, and the second thread structure corresponding to the first thread structure may be an internal thread structure.

Referring to fig. 3, in this embodiment, the pressure control structure 10 includes a mounting member 340, the mounting member 340 is provided with a mounting cavity 342 having an opening, a circumferential side wall of the mounting member 340 is provided with a through hole communicating with the mounting cavity 342, the mounting member 340 is sleeved on an outer wall of the elastic member 230 through the through hole, the extrusion member 330 extends into the mounting cavity 342 along the opening, the extrusion member 330 is connected with the transmission shaft 310, and the transmission shaft 310 drives the extrusion member 330 to move relative to the mounting member 340 so as to extrude the elastic member 230, thereby realizing adjustment of flux of the second adjustment channel 220.

Referring to fig. 4, in other embodiments, the control valve 200 includes a rotating member 240, the rotating member 240 is provided with a second adjusting channel 220, the second adjusting channel 220 is provided with a first opening for communicating with the first section channel 112 and a second opening for communicating with the second section channel 114, and the rotating member 240 is connected with the driving unit 300 to rotate relative to the first section channel 112 and the second section channel 114 under the driving of the driving unit 300, and the rotating member 240 adjusts the flux between the first opening and the first section channel 112 and the flux between the second opening and the second section channel 114 through rotation.

When the rotating member 240 rotates, the first opening and the first section channel 112 are dislocated, so that the size of the area in the first opening, which is communicated with the first section channel 112, can be adjusted, and the flux between the first opening and the first section channel 112 can be adjusted. Similarly, when the rotating member 240 rotates, the second opening and the second section channel 114 are also dislocated, so that the size of the area in the second opening, which is in communication with the second section channel 114, can be adjusted, and the flux between the second opening and the second section channel 114 can be adjusted.

Referring to fig. 4, in some embodiments, the perfusion tube 100 is formed with a mounting space having two open ends and hollow inside along the radial direction of the conveying channel 110, the first channel 112 and the second channel 114 are disposed at two sides of the mounting space, the rotating member 240 extends into the mounting space from one of the openings and extends out of the mounting space from the other opening to be connected with the driving unit 300, the control valve 200 further includes a cover 250, and the cover 250 covers one of the openings.

Referring to fig. 4, the driving unit 300 includes a transmission shaft 310, a motor 320, and a reduction mechanism (not shown), wherein the rotating member 240 is connected to the transmission shaft 310, and an output shaft of the motor 320 is connected to the transmission shaft 310 through the reduction mechanism, so as to drive the rotating member 240 to rotate when the output shaft of the motor 320 rotates. Referring to fig. 4, a second mounting hole is formed on a side of the rotating member 240 facing away from the cover 250, and the transmission shaft 310 is inserted into the second mounting hole.

Referring to fig. 2 to 4, the perfusion tube 100 is further provided with a bypass channel 400, wherein a liquid inlet of the bypass channel 400 and a liquid outlet of the bypass channel 400 are both communicated with the conveying channel 110, and the second adjusting channel 220 is disposed between the liquid inlet of the bypass channel 400 and the liquid outlet of the bypass channel 400 along the liquid conveying direction L of the conveying channel 110; the pressure control structure 10 further comprises a manual dredging valve 500, wherein the manual dredging valve 500 is connected to the filling pipe 100 for controlling the connection and the disconnection of the bypass channel 400.

When the control valve 200 fails to enable the perfusate to be delivered into the body cavity through the control valve 200, the manual dredging valve 500 is opened at this time to further conduct the bypass channel 400, so that the perfusate can be delivered into the body cavity along the bypass channel 400, and when the control valve 200 is in a normal working state, the manual dredging valve 500 is in a state of closing the bypass channel 400, and the perfusate is still delivered into the body cavity through the control valve 200.

The manual purge valve 500 may be any valve body that can control a pipe switch in the prior art, for example, the manual bypass valve may be a shut-off valve.

Referring to fig. 1 to 4, the pressure control structure 10 further includes an on-off valve 600, where the on-off valve 600 is connected to the perfusion tube 100 for controlling the on-off of the delivery channel 110. When the control valve 200 fails to shut off the delivery passage 110, the delivery passage 110 may be closed by the on-off valve 600. The on-off valve 600 may be any valve body capable of controlling the on-off of a pipeline in the prior art, for example, the on-off valve 600 may be a stop valve.

In the present utility model, 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 utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, 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 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. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. A pressure control structure for controlling pressure in a body cavity, the pressure control structure comprising:

the perfusion tube is provided with a conveying channel for communicating a liquid inlet of the endoscope and a liquid outlet of the perfusion pump;

a control valve connected to the perfusion tube; and

And the driving unit is connected with the control valve and is used for driving the control valve to adjust the flow of the liquid conveyed along the conveying channel.

2. The pressure control structure according to claim 1, wherein the control valve is movably connected with the filling pipe, and the control valve extends into the conveying channel at least partially from the outside of the filling pipe, and defines a first adjusting channel with the inner wall of the conveying channel, and the driving unit can drive the control valve to movably adjust the flux of the first adjusting channel relative to the filling pipe so as to adjust the flux of the liquid conveyed along the conveying channel.

3. The pressure control structure according to claim 2, wherein the control valve comprises a valve core, a first mounting hole is formed in a circumferential pipe wall of the pouring pipe, the valve core extends into the conveying channel through the first mounting hole and defines the first adjusting channel with an inner wall of the conveying channel, and the valve core is connected with the driving unit so as to move relative to the pouring pipe under the driving of the driving unit.

4. The pressure control structure according to claim 3, wherein the driving unit comprises a transmission shaft, a motor and a speed reducing mechanism, the transmission shaft is provided with a first thread structure, the valve core is provided with a second thread structure, the first thread structure is in spiral fit with the second thread structure, and an output shaft of the motor is connected with the transmission shaft through the speed reducing mechanism so as to drive the valve core to move relative to the pouring tube when the output shaft of the motor rotates.

5. The pressure control structure according to any one of claims 2 to 4, wherein the pouring tube is further provided with a bypass passage, both a liquid inlet of the bypass passage and a liquid outlet of the bypass passage are communicated with the conveying passage, and the first adjustment passage is provided between the liquid inlet of the bypass passage and the liquid outlet of the bypass passage in a liquid conveying direction along the conveying passage;

6. The pressure control structure according to claim 1, wherein the delivery passage includes a first section passage and a second section passage arranged along a liquid delivery direction of the delivery passage, the control valve is provided with a second adjustment passage, and the first section passage is communicated with the second section passage through the second adjustment passage;

7. The pressure control structure according to claim 6, wherein the control valve includes an elastic member formed with the second adjustment passage, and the driving unit is configured to apply a force to the elastic member such that the elastic member deforms to adjust a flux of the second adjustment passage itself.

8. The pressure control structure according to claim 7, wherein the driving unit includes an extrusion member, a transmission shaft, a motor, and a speed reduction mechanism, the extrusion member is connected to the transmission shaft, and an output shaft of the motor is connected to the transmission shaft through the speed reduction mechanism, so that the extrusion member is driven to extrude the elastic member when the output shaft of the motor rotates.

9. The pressure control structure of claim 8, wherein said drive shaft is provided with a first thread structure, a second thread structure is provided on a side of said extrusion facing away from said elastic member, said first thread structure is in screw engagement with said second thread structure, and rotation of an output shaft of said motor drives said extrusion to move and to extrude said elastic member.

10. The pressure control structure of claim 8, wherein said pressing member is a cam, and wherein rotation of said motor output shaft rotates said cam and presses said elastic member.

11. The pressure control structure according to claim 6, wherein the control valve includes a rotating member provided with the second adjustment passage, the second adjustment passage is provided with a first opening for communicating with the first section passage and a second opening for communicating with the second section passage, and the rotating member is connected with the driving unit so as to rotate relative to the first section passage and the second section passage under the driving of the driving unit, and the rotating member adjusts the flux between the first opening and the first section passage and the flux between the second opening and the second section passage by rotation.

12. The pressure control structure according to claim 11, wherein the pouring tube is formed with a mounting space having both ends open and hollow inside in a radial direction of the conveying passage, the first-stage passage and the second-stage passage are provided on both sides of the mounting space, the rotating member extends into the mounting space from one of the openings and extends out of the mounting space from the other opening to be connected with the driving unit, and the control valve further comprises a cover body covering the one of the openings.

13. The pressure control structure according to claim 12, wherein the driving unit includes a transmission shaft, a motor, and a reduction mechanism, the rotating member is connected to the transmission shaft, and an output shaft of the motor is connected to the transmission shaft through the reduction mechanism, so as to drive the rotating member to rotate when the output shaft of the motor rotates.

14. The pressure control structure of claim 13, wherein a second mounting hole is formed in a side of the rotating member facing away from the cover body, and the transmission shaft is inserted into the second mounting hole.

15. The pressure control structure according to any one of claims 6 to 14, wherein the pouring tube is further provided with a bypass passage, both a liquid inlet of the bypass passage and a liquid outlet of the bypass passage are communicated with the conveying passage, and the second adjustment passage is provided between the liquid inlet of the bypass passage and the liquid outlet of the bypass passage in a liquid conveying direction along the conveying passage;

16. The pressure control structure of any one of claims 1 to 4 or 6 to 14, further comprising a manual shut-off valve connected to the perfusion tube for controlling the conduction and closure of the delivery channel.

17. An endoscope comprising the pressure control structure of any one of claims 1 to 16.