CN116869453A

CN116869453A - Joint structure, sealing valve and endoscope

Info

Publication number: CN116869453A
Application number: CN202310948728.6A
Authority: CN
Inventors: 席启林; 王伟
Original assignee: First Affiliated Hospital of Suzhou University
Current assignee: First Affiliated Hospital of Suzhou University
Priority date: 2023-07-31
Filing date: 2023-07-31
Publication date: 2023-10-13

Abstract

The invention discloses a joint structure, a sealing valve and an endoscope, wherein the joint structure comprises a main body and a stop piece, wherein the main body is penetrated with a mounting channel extending along the front-back direction; each stop piece is arranged in the installation channel along the front-back direction and is in sealing connection with the inner wall of the installation channel, each stop piece is provided with a through hole along the front-back direction, and each through hole is respectively in sealing fit with the outer peripheral side wall of the operation instrument when the operation instrument is inserted into the installation channel from front to back. When the operation device is inserted backwards from the front end of the joint structure, the through holes of the plurality of stop pieces are respectively matched with the peripheral side wall of the operation device in a sealing way, so that liquid connected from the third pair of joints is prevented from flowing back to the front end of the joint structure; the operation device can be inserted into the elastic body in a more accurate posture, deformation failure of the elastic body caused by repeated oblique insertion of the operation device is avoided, and the operation device is fixed by the auxiliary elastic body.

Description

Joint structure, sealing valve and endoscope

Technical Field

The invention relates to the technical field of medical instruments, in particular to a joint structure, a sealing valve and an endoscope.

Background

The current minimally invasive technique for treating kidney stones mainly comprises: percutaneous nephroscope technique, ureteral soft scope technique, and ureteroscope technique. Three techniques are that an endoscope is used for entering ureters or kidneys, and different lithotripsy tools (including laser, ultrasonic and air pressure trajectory) are used for smashing stones, and the stones are taken out or sucked out, so that the purposes of removing the stones and protecting the kidney function are achieved. Different endoscopes (including a fine nephroscope, a soft ureteroscope and a ureteroscope) are provided with about 2-3 operation interfaces, wherein one interface is connected with a water flow perfusion system which is an essential integral component part of the urinary endoscope operation, so that the visual field can be kept clear, the patency of the urinary cavity can be maintained, and fragments and bleeding generated by the operation can be removed. One of the interfaces is a main operation channel through which a surgeon performs clinical operations such as lithotripsy, stone extraction and the like, for example, a guide wire is inserted during endoscope insertion, a laser fiber is inserted during lithotripsy, and a stone extraction basket is used for stone extraction after lithotripsy.

However, prior art urinary endoscopes typically use rubber stoppers at the interface of the operating channel, which have the following significant disadvantages:

firstly, medical instruments with different sizes are repeatedly placed, so that the hole in the middle of the rubber plug is gradually increased, when a water flow perfusion system is utilized to perfuse flushing liquid into a human body in the operation process, part of flushing liquid is leaked outwards from the hole of the rubber plug (namely, a sealed perfusion loop cannot be maintained), the flushing liquid quantity actually reaching the front end of an endoscope cannot meet the requirement, the operation vision is finally unclear, the operation process and quality are seriously influenced, and even the endoscope is damaged by laser generated by a laser fiber due to unclear vision; secondly, a large amount of heat is generated in the laser lithotripter process, insufficient perfusion quantity can lead flushing liquid to not take away enough heat, so that the temperature in a narrow ureter cavity is rapidly increased, thermal damage is generated to the ureter wall, and ureter stenosis complications occur after operation; in addition, the flushing liquid at the rear end of the endoscope leaks at the interface of the operation channel, and there is a risk of cross infection of the surgeon, particularly infectious diseases such as viral hepatitis B, viral hepatitis C and the like;

Secondly, the rubber plug has no function of fixing the laser fiber, so that when the soft ureteroscope and the laser fiber are used for lithotripsy, a doctor needs to fix the laser fiber by hand, otherwise, the laser fiber can retract to the lens body of the soft ureteroscope or the operation channel in the advancing, retreating, rotating and bending processes of the soft ureteroscope, so that the soft ureteroscope is damaged, and the maintenance cost of the soft ureteroscope is extremely high. If the calculus is large, the operation time is long, and at the moment, a doctor needs to keep the laser fiber and the soft ureteroscope relatively fixed by hands for a long time, and under the long-time operation, the doctor is very easy to feel tired.

Disclosure of Invention

The invention mainly aims to provide a joint structure, a sealing valve and an endoscope, and aims to solve the problems that a traditional rubber plug is easy to fail or fall off, so that liquid leakage is caused or the fixing effect on an operation instrument is poor.

In order to achieve the above object, the present invention provides a joint structure, comprising:

the main body is penetrated with a mounting channel, and the extending direction of the mounting channel is the front-back direction; the method comprises the steps of,

the two stop pieces are arranged in the installation channel along the front-back direction and are in sealing connection with the inner wall of the installation channel, each stop piece is provided with a through hole along the front-back direction, and when an operation instrument is inserted into the installation channel from front to back, each through hole is respectively in sealing fit with the peripheral side wall of the operation instrument.

Optionally, the stopper includes a movable portion circumscribing at least a portion of the bore section defining the through bore;

the movable part is movably arranged in the direction close to and far from the central axis of the through hole, so that the aperture of the through hole can be adjusted in the moving process of the movable part.

Optionally, the stopper forms the movable portion around at least a portion of the outer periphery of the through hole, the movable portion is elastically deformable, and in a natural state, an inner diameter of the through hole is not larger than an outer diameter of the operation instrument.

Optionally, the through holes extend in a long and narrow shape along the radial direction of the mounting channel, and long and narrow extending directions of the through holes of at least two stop pieces are arranged in a crossed mode.

Optionally, the main body is formed with a liquid storage cavity at the radial periphery of the mounting channel, and the liquid storage cavity is respectively provided with a liquid inlet hole and a containing hole which are communicated with the mounting channel;

the stop piece is at least positioned at the two radial sides of the through hole to form the movable part, and at least part of the movable part is exposed and installed at the accommodating hole, so that after the liquid in the installation channel enters the liquid storage cavity through the liquid inlet hole, the movable part is pushed to move towards the central axis direction of the through hole.

Optionally, the stopper further includes a fixed portion connected to a front end and/or a rear end of the movable portion, and an outer circumferential side wall of the fixed portion is kept in sealing connection with an inner wall of the installation channel during the movement of the movable portion.

Optionally, the mounting channel is communicated with the liquid storage cavity through a communication hole, and the movable part partially covers the communication hole, wherein a part of the communication hole covered by the movable part forms the accommodating hole, and a part of the communication hole not covered by the movable part forms the liquid inlet hole.

Optionally, the body includes:

the mounting groove is formed in the rear end of the first shell, a first round table is arranged at the bottom of the mounting groove in a protruding mode, and a first annular groove is formed in the mounting groove around the periphery of the first round table; the method comprises the steps of,

the front end of the second shell is inserted and connected into the mounting groove, and the rear end of the second shell is provided with a second annular groove so as to limit a second round table positioned in the ring of the second annular groove;

the installation channel penetrates through the first round table and the second round table, the first annular groove and the second shell enclose to form the liquid storage cavity, the second annular groove is used for being inserted and connected with a first butt joint of the multi-way structure, and each stop piece is clamped and fixed between the first round table and the second shell.

Optionally, the main body further comprises a third shell, the third shell is arranged in the mounting groove and is positioned between the first round table and the second shell, and the third shell is provided with the containing hole and the liquid inlet hole;

each stop piece comprises a first stop piece and a second stop piece, the first stop piece is clamped between the first round table and the third shell, and the second stop piece is clamped between the third shell and the second shell.

Optionally, two first connecting surfaces are arranged opposite to each other between the first shell and the second shell, and the joint structure further comprises an elastic sealing element, wherein the elastic sealing element is clamped between the two first connecting surfaces; and/or the number of the groups of groups,

two second connecting surfaces are arranged between the first shell and the second shell at right intervals, one of the two second connecting surfaces is provided with a sealing protrusion, and the other is provided with a sealing groove matched with the sealing protrusion in a concave-convex mode.

Optionally, two first connecting surfaces and two second connecting surfaces are respectively arranged between the first shell and the second shell;

the opposite directions between the two first connecting surfaces and the opposite directions between the two second connecting surfaces are crossed.

Optionally, the main body is provided with a pressure release runner for communicating the inside and the outside of the liquid storage cavity;

the connector structure further comprises an opening and closing piece, and the opening and closing piece is movably arranged on the pressure relief flow passage so as to move to conduct and cut off the pressure relief flow passage.

Optionally, the first shell is provided with a first pressure release flow passage communicated with the liquid storage cavity and the outer wall of the main body;

the connector structure further comprises a first opening and closing part, the first opening and closing part comprises an inserting section inserted into the first pressure relief flow passage and an operating section exposed out of the main body, the operating section is laterally protruding to form an annular step, the annular step faces are formed towards the outer wall of the main body, and the first opening and closing part is provided with an extending flow passage penetrating through the inserting section and the annular step faces, so that when the first opening and closing part is driven by external force to move, the annular step faces can be driven to abut against the outer wall of the main body to cut off the extending flow passage, and the annular step faces are driven to be separated from the outer wall of the main body to conduct the extending flow passage.

Optionally, the second housing is provided with a movable cavity and a second pressure relief runner, the movable cavity is communicated with the liquid storage cavity through a first through hole, the movable cavity is communicated with the second pressure relief runner through a second through hole, and the second pressure relief runner is communicated with the second annular groove;

The joint structure further comprises a second opening and closing piece which is elastically movably arranged in the movable cavity, so that the first through hole and the second through hole can be opened when the pressure of the liquid storage cavity is larger than that of the second annular groove.

Optionally, a pressure relief groove is formed in a lateral direction of the second annular groove, when the first butt joint part of the multi-way structure is inserted into the second annular groove, the pressure relief groove is communicated with the second pressure relief runner through the second annular groove, and when the first butt joint is completely inserted into the second annular groove, the pressure relief groove and the second pressure relief runner are cut off by the first butt joint.

In addition, in order to achieve the above object, the present invention also provides a sealing valve comprising:

the multi-way structure comprises a first pair of joints, a second pair of joints and a third pair of joints which are connected in a communicating way, wherein an elastic body is arranged in the first pair of joints, the second pair of joints is used for being connected with a body of an endoscope, and the third pair of joints is used for being connected with liquid; the method comprises the steps of,

the rear end of the joint structure is connected with the first pair of joints, the joint structure comprises a main body and at least two stop pieces, the main body is provided with a mounting channel in a penetrating way, and the extending direction of the mounting channel is in a front-back direction; at least two stop pieces are arranged in the mounting channel along the front and back directions and are in sealing connection with the inner wall of the mounting channel, each stop piece is provided with a through hole along the front and back directions, when an operation instrument is sequentially inserted into the mounting channel and the first butt joint from front to back, the operation instrument is clamped and fixed by the elastic body, and each through hole is respectively in sealing fit with the peripheral side wall of the operation instrument.

In addition, in order to achieve the above object, the present invention provides an endoscope including a body, an operation instrument, and a sealing valve connecting the body and the operation instrument, the sealing valve including:

In the technical scheme provided by the invention, the rear end of the joint structure is connected with the first pair of joints on the multi-way structure, so that the installation channel and the inner cavity of the multi-way structure are communicated to form an operation channel together; in the process that the operation device is inserted into the operation channel from the front end of the joint structure backwards, through holes of the plurality of stop pieces are respectively matched with the peripheral side wall of the operation device in a sealing mode, on one hand, a plurality of stop protection can be formed in sequence, and the liquid connected from the third pair of joints is prevented from flowing back to the front end of the joint structure while sufficient filling quantity is ensured; on the other hand, the operation device can be inserted into the elastic body to be centered, so that the operation device can be more conveniently inserted into the elastic body in a more accurate gesture, the deformation failure of the elastic body caused by repeated oblique insertion of the operation device is avoided, the operation device is fixed by the auxiliary elastic body, and the fixing effect of the operation device is enhanced. In addition, the outer peripheral side wall of a plurality of backstop spare and the inner wall sealing connection of installation passageway can form multichannel sealing protection in proper order, is difficult for droing under hydraulic pressure effect, and when elastomer deformation became invalid or droing, it can also have a backstop spare to play the effect equivalent with the elastomer at least to guarantee, avoids the operation to break off, finally helps improving the service quality of product.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic front view of an embodiment of a sealing valve according to the present invention;

FIG. 2 is a schematic cross-sectional view of the sealing valve of FIG. 1 at A-A;

FIG. 3 is an enlarged schematic view of the structure shown at B in FIG. 2;

FIG. 4 is an enlarged schematic view of FIG. 2C, wherein the second opening/closing member intercepts the second pressure release flow channel;

FIG. 5 is an enlarged schematic view of FIG. 2C, wherein the second opening/closing member is in communication with the second pressure release flow channel;

FIG. 6 is an exploded view of the body and stopper of FIG. 2;

FIG. 7 is an exploded schematic view of the main structure of the sealing valve of FIG. 1;

fig. 8 is a schematic perspective view of the first stopper and the second stopper in fig. 1.

Reference numerals illustrate:

1, a sealing valve; a 10-way structure; 100 valve body; 110 a first pair of joints; 120 a second pair of joints; 130 a third pair of joints; 140 flow channels; 150 an elastomer; 160 pressing the piece; a 20-joint structure; 210 a main body; 211 mounting channels; 212 a reservoir; 213a first housing; 213a mounting slots; 213b first round table; 213c first annular groove; 214a second housing; 214a second annular groove; 214b a second round table; 214c a pressure relief groove; 215a third housing; 215a communicating holes; 215b liquid inlet holes; 215c receiving holes; 216 a first connection surface; 217 second connection face; 217a sealing projection; 217b seal grooves; 218a first pressure relief flow path; 218b a second pressure relief flow path; 218c an active cavity; 220 a first stop; 221 a first via; 222 movable part; 223 fixing part; 230 a second stop; 231 second through holes; 240 an elastomeric seal; 250 a first shutter; 251 insert section; 252 operating section; 252a annular step surface; 253 extending the flow path; 260 a second shutter; 261 blocks; 262 an elastic connection; 263 stop.

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

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

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is 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 addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

In view of the above, the present invention also provides an endoscope, the application of which is not limited, and which can be applied to any suitable surgical treatment, such as percutaneous nephroscope technique, ureteroscope technique, etc. used in the minimally invasive technique for treating kidney stones. Thus, the specific structure of the endoscope will appear different depending on the application. It will be appreciated that the endoscope comprises at least a body, an operating instrument and a sealing valve 1. Wherein the body integrates the relevant components required for the normal functioning of the endoscope, such as a control system, an imaging system, an illumination system, a perfusion system, a traction assembly, etc. The working instrument may be, but is not limited to, a guidewire, a laser fiber, a stone basket, forceps, etc. The sealing valve 1 connects the operating instrument to the body of the endoscope as one piece.

Based on the above, referring to fig. 1 to 8, the present invention further provides a sealing valve 1, where the sealing valve 1 includes a multi-way structure 10 and a joint structure 20.

The multi-way structure 10 includes a valve body 100 and at least two butt joints disposed on the valve body 100, where the number of the butt joints is not limited and can be specifically adjusted according to actual needs; a flow passage 140 is formed between the valve body 100 and each pair of connectors, which are abutted with their corresponding devices or apparatuses such that the flow passage 140 is connected to the corresponding devices or apparatuses on-off.

Taking the multi-way structure 10 as an example of a three-way structure, that is, taking the number of butt joints as three as an example, wherein the three butt joints are respectively a first butt joint 110, a second butt joint 120 and a third butt joint 130 which are arranged in a communicating manner. Wherein the first pair of connectors 110 is connected with the sealing valve 1 to connect with an operation instrument, the second pair of connectors 120 is connected with a body of an endoscope, and the third pair of connectors 130 is used for accessing liquid.

When the above connection operation is completed, the flow channel 140 of the first butt joint 110 and the flow channel 140 of the second butt joint 120 are communicated with the mounting channel 211 in the joint structure 20 to jointly form an operation channel through which the operation instrument is inserted. In general, the first butt joint 110 is provided with an elastic body 150, and the elastic body 150 is a hollow elastic block structure, and the hollow elastic block structure is communicated with and coaxial with the operation channel. When the operation device is inserted into the hollow structure of the elastic body 150 along the operation channel, the operation device is elastically clamped by the elastic body 150, so that the operation device is basically fixed relative to the machine body, the relative multi-way structure 10 and the relative joint structure 20.

It should be noted that, the hollow structure of the elastic body 150 is generally configured such that, in a natural undeformed state, the inner diameter thereof is smaller than the outer diameter of the operating device, so that the operating device and the elastic body 150 are in interference fit.

Of course, the hollow structure of the elastic body 150 may be configured such that the inner diameter thereof is slightly smaller, equal to or slightly larger than the outer diameter of the operation device in a natural undeformed state, and then the hollow structure is contracted in diameter by the associated external force when the operation device is inserted into the hollow structure, thereby elastically clamping the operation device.

Referring to fig. 1, 2 and 7, in an embodiment, the multi-pass structure 10 further includes a pressing member 160, where the pressing member 160 is disposed in the flow channel 140 of the first pair of connectors 110 and is located at an end of the elastic body 150 near the interface of the first pair of connectors 110. The elastic body 150 is provided with a convex rib towards one end of the pressing piece 160, the pressing piece 160 is abutted against the convex rib, when the joint structure 20 is spliced with the first butt joint 110, the joint structure 20 applies pressure towards the elastic body 150 to the pressing piece 160, the pressure is transmitted to the convex rib through the pressing piece 160 and acts on the periphery of the elastic body 150 around the hollow structure, the elastic body 150 is extruded to elastically deform, the inner wall of the hollow structure is driven to extrude the periphery of the operation instrument, and elastic clamping is achieved.

In view of the above, the present invention further provides a joint structure 20, wherein the rear end of the joint structure 20 is connected to the first pair of joints 110, so that an operation instrument can pass through the mounting channel 211, the first pair of joints 110 and the elastic body 150 sequentially from front to back.

The joint structure 20 includes a body 210 and at least two stops. Wherein, the main body 210 is penetrated with a mounting channel 211, and the extending direction of the mounting channel 211 is the front-back direction; each stopper is disposed in the mounting channel 211 along the front-rear direction and is in sealing connection with the inner wall of the mounting channel 211, each stopper is provided with a through hole along the front-rear direction, and each through hole is respectively in sealing fit with the peripheral side wall of the operation device when the operation device is inserted into the mounting channel 211 from front to rear.

In the technical scheme provided by the invention, the rear end of the joint structure 20 is connected with the first butt joint 110 on the multi-way structure 10, so that the installation channel 211 and the inner cavity of the multi-way structure 10 are communicated together to form an operation channel; in the process of inserting the operation device from the front end of the joint structure 20 to the rear direction of the operation channel, the through holes of the plurality of stop pieces are respectively in sealing fit with the peripheral side wall of the operation device, on one hand, a plurality of stop protections can be sequentially formed, and the liquid connected from the third pair of joints 130 is prevented from flowing back to the front end of the joint structure 20 while the sufficient filling amount is ensured; on the other hand, the operation device can be inserted and centered, so that the operation device can be more conveniently inserted into the elastic body 150 in a more accurate gesture, deformation failure of the elastic body 150 caused by repeated oblique insertion of the operation device is avoided, the operation device is fixed by the auxiliary elastic body 150, and the fixing effect of the operation device is enhanced. In addition, the outer peripheral side walls of the plurality of stoppers are in sealing connection with the inner wall of the mounting channel 211, so that a plurality of sealing protections can be sequentially formed, falling off is not easy to occur under the action of hydraulic pressure, and when the elastic body 150 is deformed and fails or falls off, at least one stopper is ensured to play a role equivalent to that of the elastic body 150, the interruption of operation is avoided, and finally the use quality of the product is improved.

In view of the above, the main body 210 is provided with the mounting channel 211, and when the joint structure 20 is in butt joint with the first butt joint 110 in the multi-way structure 10, the flow channel 140 of the first butt joint 110 and the mounting channel 211 are substantially coaxially disposed and together form an operation channel through which the operation instrument is inserted. It should be noted that, in practical application, the sealing valve 1 may be installed and operated in any suitable posture, however, for ease of understanding, in the following embodiments, the extending direction of the installation channel 211/operation channel is defined as a front-back direction, and the end where the operation instrument is first inserted is the front end, that is, the end of the joint structure 20 away from the first pair of joints 110. Furthermore, in the following embodiments, the mounting channel 211/operating channel or the axial direction of the co-axially extending hole-like structure therewith, i.e. the forward-backward direction, the radial direction of the mounting channel 211/operating channel or the co-axially extending hole-like structure therewith, i.e. the direction substantially perpendicular to the forward-backward direction.

In order to facilitate quick assembly and disassembly between the main body 210 and the first butt joint 110, the main body 210 is generally provided with a connection portion, and the first butt joint 110 is provided with a butt joint portion, and the connection portion is adapted to be mounted with the butt joint portion. The connecting part and the butt joint part can be a combination of an internal thread and an external thread, a combination of a magnetic piece and a magnetic matching piece, a combination of an adsorption piece and an adsorption matching piece, a combination of an adhesive piece and the like. For example, as shown in fig. 2, the connecting part is provided with internal threads, the abutting part is provided with external threads, and the two parts are screwed and fixed.

The main body 210 may directly represent a block structure which is entirely hollow; alternatively, in an embodiment, the main body 210 includes a plurality of shell structures, and each of the shell structures may be sequentially connected in a front-rear direction of the main body 210 (for example, a first housing 213, a second housing 214, and a third housing 215 described below), or may be sequentially connected in a radial direction of the mounting channel 211. The connection mode of each shell structure is not limited and can be welded and fixed; or one or more of the detachable connection modes of screw connection, adhesive connection, buckle connection, magnetic attraction connection and the like.

For example, referring to fig. 2, 6 and 7, the main body 210 includes a first housing 213 and a second housing 214, a mounting groove 213a is formed at the rear end of the first housing 213, and a first round table 213b is convexly disposed at the bottom of the mounting groove 213 a; the front end of the second housing 214 is inserted and connected into the mounting groove 213a, and the rear end of the second housing 214 is provided with a second annular groove 214a to define a second round table 214b located in the ring of the second annular groove 214 a; the mounting channel 211 penetrates through the first circular table 213b and the second circular table 214b, and the second annular groove 214a is used for inserting and connecting the first butt joint 110 of the multi-way structure 10.

Further, in an embodiment, two first connection surfaces 216 are disposed opposite to each other between the first housing 213 and the second housing 214, and the joint structure 20 further includes an elastic sealing member 240, where the elastic sealing member 240 is sandwiched between the two first connection surfaces 216. The two first connection surfaces 216 may be formed at the bottom wall of the mounting groove 213a, at the side wall of the mounting groove 213a, or on the outer surface of the protruding strip or the inner wall of the groove after protruding the protruding strip or recessing the groove on the side wall of the mounting groove 213 a. As shown in fig. 6, for example, the first connection surface 216 is provided on the groove bottom wall of the first housing 213 located in the mounting groove 213a and the front end surface of the second housing 214. The elastic sealing member 240 is, for example, a rubber sealing ring, and the cross-sectional shape of the rubber sealing ring may be, for example, circular, elliptical, polygonal, or a desired special shape.

And/or in an embodiment, two second connecting surfaces 217 are arranged opposite to each other between the first housing 213 and the second housing 214, one of the two second connecting surfaces 217 is provided with a sealing protrusion 217a, and the other is provided with a sealing groove 217b matched with the sealing protrusion 217a in a concave-convex manner. The second connection surface 217 may be disposed with reference to the first connection surface 216, which is not described in detail; the sealing protrusion 217a may be shaped and sized to fit into the sealing recess 217b or be slightly larger in size than the sealing recess 217b. The provision of the sealing protrusion 217a and the sealing groove 217b helps to increase the total area and the diversity of orientations of the connection surfaces between the first housing 213 and the second housing 214, and increase the difficulty of gas or liquid in and out.

Further, when two first connection surfaces 216 and two second connection surfaces 217 are respectively disposed between the first housing 213 and the second housing 214, the facing directions of the two first connection surfaces 216 and the facing directions of the two second connection surfaces 217 are disposed to intersect. For example, as shown in fig. 6, the two first connection surfaces 216 are disposed opposite to each other in a forward and backward direction, and the two second connection surfaces 217 are disposed opposite to each other in a radial direction outside and a radial direction outside, respectively, so as to increase the multi-directionality of the sealing connection surface between the first housing 213 and the second housing 214, and realize the sealing in each direction.

Each stopper is provided at the mounting channel 211. It can be appreciated that the stopper is additionally provided on the basis of the elastic body 150, so that when the elastic body 150 is repeatedly inserted to increase the hollow structure, the liquid flowing back to the main body 210 can be effectively stopped, thereby avoiding the liquid leakage in the surgical irrigation process, preventing the closed irrigation loop from being opened and affecting the surgical progress and quality. In addition, the setting of backstop piece can also realize carrying out the centre gripping to the fixed of operating device in the operation passageway, avoids operating device relative operation passageway activity, and causes the apparatus damage or increases operating personnel's operation burden.

By providing at least two stops, the above-mentioned back-flow stopping and fixing clamping actions can be further enhanced. In practice, the structure of the stops may be identical or at least some of the stops may be purposefully provided differently, for example, in terms of a back-flow stop and/or in terms of a fixed grip.

For example, in one embodiment, at least one of the stoppers may have a through hole formed in a slit shape extending in a certain radial direction of the mounting channel 211; at least one other through hole may be provided in a circular hole shape coaxially provided with the mounting passage 211. Or in an embodiment, each stop is made of an elastic material, wherein the stop closest to the front end has a stronger elastic deformability than the other stops. Alternatively, in an embodiment, referring to fig. 8, in each stopper, the through hole is elongated along the radial extension of the mounting channel 211, and the elongated extension directions of the through holes of at least two stoppers are disposed in a crossing manner. It can be understood that when the through hole is long and narrow, the long and narrow extension length of the through hole can reserve enough insertion space for the insertion of operation instruments with various outer diameter sizes; the two opposite side parts of the stop piece in the width direction of the long and narrow through hole play a main elastic clamping role, and in view of the crossed arrangement of the long and narrow extending directions, the elastic clamping directions are crossed, and finally, the total clamping direction of each stop piece to the operation instrument is enabled to be various, so that the sealing abutting and elastic clamping effects to the operation instrument are improved.

In practical application, the stop members can be sequentially arranged adjacently along the front-back direction, namely, the stop members are equivalent to the stop structures which are spliced together to form a relatively large thickness, but are still convenient for the operation of the appliance to wear. Or, each stopper can be along the interval setting in proper order of fore-and-aft direction, reserve the interval space between every two adjacent stoppers for even if some stoppers become invalid, this interval space can store certain volume of liquid, avoids causing the liquid to ooze each other because the distance is too near between each stopper.

When the stoppers are disposed apart from each other: if the main body 210 has a block structure with a hollow structure, the stoppers can be disposed as close to two ports of the mounting channel 211 as possible, which facilitates the operations of disassembly, assembly, replacement, and routine maintenance.

If the main body 210 is detachably connected to a plurality of shell structures as described above, each of the stoppers may be disposed on any shell structure according to practical needs, where, for example, in an embodiment, when the main body 210 includes two shells (for example, a first shell 213 and a second shell 214 described below) that are sequentially connected in a front-rear direction, each of the stoppers may be commonly limited between the two shells, so as to facilitate the assembly and disassembly of any one of the shells. At this time, if at least the through holes of the stop members need to be spaced apart from each other in the front-rear direction, the portion of at least one stop member where the through holes are formed may be concavely formed or entirely concavely formed, so that the through holes are spaced apart from the through holes of the other stop members by the concaved portion or the concaved portion.

Or in an embodiment, when the main body 210 includes two housings (for example, a first housing 213 and a second housing 214 described below) sequentially connected in the front-rear direction, each of the stoppers is respectively limited between the different two housings. Therefore, the two stop pieces can be separated by the shell between the two stop pieces, so that the quick disassembly and assembly of the stop pieces are facilitated, and the two stop pieces are separated without additional structural design.

Based on any of the above embodiments, in order to achieve elastic clamping of the operation device by each stopper, referring to fig. 2, 6 to 8, in one embodiment, the stopper includes a movable portion 222, and the movable portion 222 encloses at least a portion of the hole section defining the through hole; the movable portion 222 is movably disposed in a direction approaching and separating from the central axis of the through hole, so that the aperture of the through hole can be adjusted during the movement of the movable portion 222.

It will be appreciated that the movable portion 222 may be provided at the entire hole section or at a partial hole section of the through hole along its length direction; the movable portion 222 may be provided at one side, opposite sides, or the entire circumference outside of the through hole in the radial direction thereof. When the movable part 222 moves towards the direction close to the central axis of the through hole, the aperture of the through hole is reduced, the outer wall of the operation instrument penetrating through the through hole is extruded, and the clamping force on the operation instrument is increased; on the contrary, when the movable part 222 moves towards the central axis direction far away from the through hole, the aperture of the through hole is increased, the extrusion force is reduced or the outer wall of the operation device penetrating through the through hole is completely separated, the clamping force on the operation device is weakened, and the operation device can be conveniently movably adjusted relative to the stop piece or pulled out from the operation channel.

Of course, in the present design, when the movable portion 222 moves on its moving stroke, especially in a direction approaching the central axis of the through hole, the radially outer wall of the movable portion 222 may be separated from the inner wall of the mounting channel 211, and therefore, in an embodiment, the stopper further includes a fixing portion 223 connected to the front end and/or the rear end of the movable portion 222, and during the movement of the movable portion 222, the outer peripheral side wall of the fixing portion 223 is in sealing connection with the inner wall of the mounting channel 211. That is, no matter how the movable portion 222 moves, at least the fixed portion 223 is always kept in sealing contact with the inner wall of the mounting passage 211, and the liquid is effectively stopped. The movable part 222 and the fixed part 223 are sequentially connected along the front and rear directions, and the movable part 222 and the fixed part can be integrally formed and arranged, or can be detachably connected after being separately arranged.

For example, as shown in fig. 7 to 8, each stopper includes a first stopper 220, the first stopper 220 is substantially cylindrical, the first stopper 220 includes a first cylindrical section and a second cylindrical section which are connected in order from front to back, the first cylindrical section has an outer diameter larger than that of the second cylindrical section, the first cylindrical section constitutes a fixed portion 223, and at least a part of the second cylindrical section constitutes a movable portion 222.

Of course, there are various ways of realizing the above-mentioned aperture of the through hole by the movable adjustment of the movable portion 222:

for example, the movable portion 222 may be configured to perform an elastically deformable movement: in an embodiment, the stopper forms the movable portion 222 at least around the periphery of the through hole, the movable portion 222 is elastically deformable, and in a natural state, the inner diameter of the through hole is not greater than the outer diameter of the operating device. Because the stopper is at least arranged around the periphery of the through hole in an elastically deformable manner, when the operation device is inserted into the through hole, the larger outer diameter of the stopper drives the aperture of the through hole to be increased, and then drives the movable part 222 to perform compression deformation in a direction away from the central axis of the through hole, and elastic restoring force generated by the deformation is applied to the outer wall of the operation device to elastically clamp the operation device.

The movable portion 222 may also be configured to perform radial translation, rotation about a single end, etc., and/or in combination with the elastically deformable activities described above, for example: in an embodiment, the main body 210 forms a liquid storage cavity 212 at the radial periphery of the mounting channel 211, and the liquid storage cavity 212 is respectively provided with a liquid inlet 215b and a containing hole 215c which are communicated with the mounting channel 211; the stopper is at least located at two radial sides of the through hole to form the movable portion 222, and at least part of the movable portion 222 is exposed and mounted at the accommodating hole 215c, so that after the liquid in the mounting channel 211 enters the liquid storage cavity 212 through the liquid inlet hole 215b, the movable portion 222 is pushed to move towards the central axis direction of the through hole.

In this way, when the liquid fills the operation channel, the liquid enters the liquid storage cavity 212 through the liquid inlet 215b, so that the liquid pressure in the liquid storage cavity 212 gradually increases, the pushing force acting on the radially outer side of the movable portion 222 through the accommodating hole 215c also gradually increases, and finally the movable portion 222 is pushed to move towards the central axis direction close to the through hole.

The liquid inlet 215b and the receiving hole 215c may be provided in a part between the mounting passage 211 and the liquid storage chamber 212, or may be provided intermittently along the outer periphery of the mounting passage 211, or may be provided in a plurality of rings extending along the outer periphery of the mounting passage 211.

The liquid inlet hole 215b and the accommodation hole 215c may be provided in communication with each other or may be provided independently of each other. Referring to fig. 2 and 6, in an embodiment, the mounting channel 211 and the liquid storage cavity 212 are communicated through a communication hole 215a, the movable portion 222 partially covers the communication hole 215a, wherein a portion of the communication hole 215a covered by the movable portion 222 forms the accommodating hole 215c, and a portion of the communication hole 215a not covered by the movable portion 222 forms the liquid inlet hole 215b. In this way, only one communication hole 215a is required to be arranged between the mounting channel 211 and the liquid storage cavity 212, and the communication hole 215a can be divided into the accommodating hole 215c and the liquid inlet hole 215b by covering part of the communication hole 215a through the movable part 222, which is beneficial to the structural simplification and the operation convenience.

Specifically, referring to fig. 2 and fig. 6 to fig. 7, in an embodiment, when the main body 210 includes the first housing 213 and the second housing 214 as described above, further, a mounting groove 213a is formed at a rear end of the first housing 213, a first circular table 213b is convexly formed at a bottom of the mounting groove 213a, and a first annular groove 213c is formed around an outer periphery of the first circular table 213b in the mounting groove 213 a; the front end of the second housing 214 is inserted and connected into the mounting groove 213a, and the rear end of the second housing 214 is provided with a second annular groove 214a to define a second round table 214b located in the ring of the second annular groove 214 a; the mounting channel 211 penetrates through the first round table 213b and the second round table 214b, the first annular groove 213c and the second housing 214 enclose to form the liquid storage cavity 212, the second annular groove 214a is used for inserting and connecting the first butt joint 110 of the multi-way structure 10, and each stop piece is clamped and fixed between the first round table 213b and the second housing 214. When the first housing 213 and the second housing 214 are detached, the liquid storage chamber 212 can be movably opened; when the first housing 213 and the second housing 214 are assembled, the liquid storage cavity 212 is conveniently sealed (except for the liquid inlet 215b and the accommodating hole 215 c), and the sealed connection between the first housing 213 and the second housing 214 helps to form a relatively closed cavity structure (except for the liquid inlet 215b and the accommodating hole 215 c) in the liquid storage cavity 212, so that the required hydraulic pressure can be achieved, and the movable part 222 is pushed to move.

Further, in an embodiment, the main body 210 further includes a third housing 215, where the third housing 215 is disposed in the mounting groove 213a and between the first circular table 213b and the second housing 214, and the third housing 215 is provided with the accommodating hole 215c and the liquid inlet 215b; each of the stoppers includes a first stopper 220 and a second stopper 230, the first stopper 220 is interposed between the first boss 213b and the third housing 215, and the second stopper 230 is interposed between the third housing 215 and the second housing 214. The third housing 215 is configured to space the first stopper 220 and the second stopper 230 apart, and simultaneously, the accommodating hole 215c is configured to increase the mutual matching degree between the first stopper 220, the second stopper 230 and the accommodating hole 215c and the first housing 213 and the second housing 214, so that the first housing 213 and the second housing 214 can be commonly used for various first stoppers 220 and second stoppers 230, and the practicability of the whole machine is increased.

In addition, in one embodiment, the main body 210 is provided with a pressure release channel 140 for communicating the inside and the outside of the liquid storage cavity 212; the joint structure 20 further includes an opening and closing member, which is movably disposed in the pressure relief flow channel 140, so as to move to conduct and intercept the pressure relief flow channel 140. The pressure release flow channel 140 can be adjusted to be conducted and cut off by operating the movement of the opening and closing piece, and then the conduction and cut-off between the external environment and the liquid storage cavity 212 are adjusted, so that when the hydraulic pressure in the liquid storage cavity 212 is overlarge, the external environment and the liquid storage cavity 212 can be conducted by conducting the pressure release flow channel 140, and a certain hydraulic pressure is released outwards; conversely, when the hydraulic pressure in the liquid storage cavity 212 is too low, the external environment and the liquid storage cavity 212 are blocked by blocking the pressure release flow channel 140, so that a closed space is provided, and the hydraulic pressure is conveniently accumulated.

Specifically, referring to fig. 2 to 3 and 7, in one embodiment, the first housing 213 is provided with a first pressure release channel 218a that communicates between the liquid storage cavity 212 and the outer wall of the main body 210; the joint structure 20 further includes a first opening and closing member 250, where the first opening and closing member 250 includes an insertion section 251 inserted into the first pressure relief flow channel 218a and an operation section 252 exposed out of the main body 210, the operation section 252 laterally protrudes with an annular step and forms an annular step surface 252a facing the outer wall of the main body 210, and the first opening and closing member 250 is provided with an extension flow channel 253 penetrating through the insertion section 251 and the annular step surface 252a, so that when the first opening and closing member 250 is driven by an external force to move, the annular step surface 252a can be driven to abut against the outer wall of the main body 210 to intercept the extension flow channel 253, and the annular step surface 252a is driven to be spaced from the outer wall of the main body 210 to conduct the extension flow channel 253.

The first opening and closing member 250 may be manually operated by an operator, or may be automatically driven by a driving device, such as a linear cylinder, which is additionally provided. The insertion section 251 of the first opening and closing member 250 is inserted into the first pressure release flow channel 218a, and since the inner channel opening of the extension flow channel 253 is always communicated with the first pressure release flow channel 218a or the liquid storage cavity 212, the outer channel opening of the extension flow channel 253 is arranged on the annular step surface 252a, and when the annular step surface 252a is close to the outer wall of the main body 210 and is mutually attached, the outer channel opening is covered by the outer wall of the main body 210, so that the extension flow channel 253, the first pressure release flow channel 218a and the liquid storage cavity 212 are cut off; conversely, when the annular step surface 252a is far away from the outer wall of the main body 210 and separated from each other, the outer channel opening is opened, so as to realize the conduction among the extension channel 253, the first pressure release channel 218a and the liquid storage cavity 212.

Further, in an embodiment, the second housing 214 is provided with a movable cavity 218c and a second pressure relief flow channel 218b, the movable cavity 218c is communicated with the liquid storage cavity 212 through a first through hole 221, the movable cavity 218c is communicated with the second pressure relief flow channel 218b through a second through hole 231, and the second pressure relief flow channel 218b is communicated with the second annular groove 214 a; the joint structure 20 further includes a second opening and closing member 260, where the second opening and closing member 260 is elastically movably disposed in the movable cavity 218c, so as to be capable of opening the first through hole 221 and the second through hole 231 when the pressure of the liquid storage cavity 212 is greater than the pressure of the second annular groove 214a.

The second opening and closing member 260 can be driven to move by the pressure difference according to the pressure difference between the liquid storage cavity 212 and the second annular groove 214a, so as to achieve the purpose of adjusting the hydraulic pressure in the liquid storage cavity 212. The movable chamber 218c may be disposed longitudinally along the radial extension of the mounting channel 211, and the second pressure relief flow passage 218b may be disposed longitudinally along the axial extension of the mounting channel 211 to facilitate direct connection of the reservoir 212 and the second annular groove 214a. The second shutter 260 includes a block 261 reciprocally movable in the movable chamber 218c along a radial direction of the mounting passage 211, an elastic connection member 262 connected between the block 261 and the movable chamber 218c, and a stopper 263 provided at any side of the movable chamber 218c along the radial direction of the mounting passage 211, the elastic connection member 262 being elastically deformed to move the block 261, the stopper 263 being capable of restricting the block 261 from moving out of the movable chamber 218 c.

When the pressure of the liquid storage chamber 212 is greater than the pressure of the second annular groove 214a, the forward hydraulic pushing block 261 moves along the radial inner side of the mounting channel 211, opening the first through hole 221 and the second through hole 231; when the pressure of the liquid storage cavity 212 is not greater than the pressure of the second annular groove 214a, the block 261 can be set to be static relative to the movable cavity 218c to maintain the current state; the block 261 is arranged to move in opposite directions along the radially outer side of the mounting channel 211, closing said first through hole 221 and/or said second through hole 231, either under the driving of the return force of the elastic connection 262 or under the negative hydraulic driving.

Further, in an embodiment, a pressure relief groove 214c is formed in a lateral direction of the second annular groove 214a, when the first pair of connectors 110 of the multi-way structure 10 is partially inserted into the second annular groove 214a, the pressure relief groove 214c and the second pressure relief flow channel 218b are communicated through the second annular groove 214a, and when the first pair of connectors 110 is completely inserted into the second annular groove 214a, the pressure relief groove 214c and the second pressure relief flow channel 218b are blocked by the first pair of connectors 110. The first abutment 110 is sealingly (by means of a seal ring or the like) movably adjustably (e.g., threadedly) coupled to the second annular groove 214 a. Specifically, when the first pair of connectors 110 is provided with external threads and the second annular groove 214a is provided with internal threads, during the screwing process of the first pair of connectors 110, the communication among the second pressure release flow channel 218b, the second annular groove 214a and the pressure release groove 214c is gradually reduced, even completely cut off; conversely, during the unscrewing process of the first docking head 110, the second pressure release channel 218b, the second annular groove 214a and the pressure release groove 214c are sequentially connected, so that the liquid in the liquid storage cavity 212 can be released.

Based on any of the above embodiments, a side surface of the stopper facing the front end of the main body 210 may be disposed obliquely or concavely in a direction approaching the through hole, so as to form an oblique or arc-shaped guiding surface, so as to guide the operation device to gradually insert in a centered manner, and avoid the operation device from breaking the stopper and causing the stopper to fail.

The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.

Claims

1. A joint structure, comprising:

2. The joint structure of claim 1, wherein the stop includes a movable portion circumscribing at least a portion of the bore section defining the through bore;

3. The joint structure according to claim 2, wherein the stopper forms the movable portion around at least a portion of an outer periphery of the through hole, the movable portion is elastically deformable, and an inner diameter of the through hole is not larger than an outer diameter of the operation instrument in a natural state.

4. A joint structure according to claim 3, wherein said through holes are elongated along the radial extension of said mounting channel, and the elongated extension directions of said through holes of at least two of said stoppers are disposed crosswise.

5. The joint structure according to claim 2, wherein the main body is formed with a liquid storage cavity at a radial periphery of the mounting channel, and the liquid storage cavity is respectively provided with a liquid inlet hole and a containing hole which are communicated with the mounting channel;

6. The joint structure according to claim 5, wherein the stopper further comprises a fixed portion connected to a front end and/or a rear end of the movable portion, and an outer peripheral side wall of the fixed portion is held in sealing connection with an inner wall of the mounting passage during the movement of the movable portion.

7. The joint structure according to claim 5, wherein the mounting passage and the liquid storage chamber are communicated through a communication hole, the communication hole is partially covered by the movable portion, wherein a portion of the communication hole covered by the movable portion constitutes the accommodation hole, and a portion of the communication hole not covered by the movable portion constitutes the liquid inlet hole.

8. A joint construction according to any one of claims 5 to 7, wherein the body comprises:

9. The joint structure according to claim 8, wherein the main body further comprises a third housing, the third housing is disposed in the mounting groove and located between the first round table and the second housing, and the third housing is provided with the receiving hole and the liquid inlet hole;

10. The joint structure of claim 8, wherein said first housing and said second housing have two first connection surfaces disposed in facing spaced relation therebetween, said joint structure further comprising an elastomeric seal sandwiched between said two first connection surfaces; and/or the number of the groups of groups,

11. The joint structure of claim 10, wherein two of said first connection surfaces and two of said second connection surfaces are respectively provided between said first housing and said second housing;

12. The connector structure of claim 8, wherein the main body is provided with a pressure release flow passage for communicating the inside and outside of the liquid storage cavity;

13. The fitting structure of claim 12, wherein said first housing is provided with a first pressure relief flow passage communicating said reservoir and said outer body wall;

14. The joint structure of claim 12, wherein the second housing is provided with a movable cavity and a second pressure relief flow passage, the movable cavity is communicated with the liquid storage cavity through a first through hole, the movable cavity is communicated with the second pressure relief flow passage through a second through hole, and the second pressure relief flow passage is communicated with the second annular groove;

15. The fitting structure of claim 14, wherein said second annular groove is laterally open with a relief groove, said relief groove being in communication with said second relief flow passage through said second annular groove when a first pair of fittings of said multipass structure is partially inserted into said second annular groove, and said relief groove being blocked by said first pair of fittings when said first pair of fittings is fully inserted into said second annular groove.

16. A sealing valve, comprising:

A joint arrangement according to any one of claims 1 to 15, the rear end of the joint arrangement being connected to the first pair of joints for passage of an operating instrument through the mounting channel, the first pair of joints and the elastomer in that order from front to back.

17. An endoscope, comprising:

a body;

operating the instrument; the method comprises the steps of,

the sealing valve of claim 16, connecting the body and the operating instrument.