Arthroscope sheath flow valve connecting structure and arthroscope suite

Abstract

The embodiment provides an arthroscope sheath flow valve connecting structure and an arthroscope suite, and relates to the field of medical instruments, and the arthroscope sheath flow valve connecting structure comprises a sheath tube, a flow valve assembly, a connecting tube and a fixing piece. The connecting pipe is fixed to the pipe wall of the sheath pipe and provided with a first sealing conical face. The flow valve assembly is provided with a second sealing conical surface, the flow valve assembly is matched with the connecting pipe in an inserted mode, and the first sealing conical surface is attached to the second sealing conical surface. The fixing piece is connected to the sheathing canal and the flow valve assembly at the same time and used for limiting the first sealing conical face and the second sealing conical face to be away from each other. According to the design of the flow valve connecting structure, the sealing performance can be improved on the premise that the machining cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of medical equipment, and particularly relates to a joint mirror sheath flow valve connecting structure and joint mirror kit. BACKGROUND

[0002] In the clinical treatment process, the joint mirror body is usually used in cooperation with the outer sheath, after the outer sheath is placed into the patient's body, the joint mirror body is inserted into the outer sheath, so that the joint mirror body is used to carry out the related treatment operation. In the treatment process, the liquid needs to be transported or discharged through the outer sheath, in order to control the flow of the liquid, a flow regulating valve is generally installed on the outer sheath. The flow regulating valve and the outer sheath generally adopt two connection modes, one is that the flow regulating valve is directly integrated on the outer sheath, and the two are integrated structures, and the other is that the flow regulating valve and the outer sheath are detachably cooperated.

[0003] The inventor found at least the following disadvantages of the cooperation structure of the flow regulating valve and the outer sheath in the prior art in research.

[0004] The flow regulating valve and the outer sheath of the integrated structure have high processing cost, the flow regulating valve and the outer sheath of the split type are in butt joint cooperation, the sealing performance is poor, and the sealing performance is poor after being disassembled for many times, and the probability of sealing failure is increased. UTILITY MODEL CONTENT

[0005] The utility model aims to provide a joint mirror sheath flow valve connecting structure and joint mirror kit, which can improve the sealing performance under the premise of reducing the processing cost.

[0006] The embodiment of the utility model can be realized as follows:

[0007] In the first aspect, the utility model provides a joint mirror sheath flow valve connecting structure, which comprises:

[0008] The sheath tube, the flow valve assembly, the connecting pipe and the fixing part, the connecting pipe is fixed on the pipe wall of the sheath tube, the connecting pipe is provided with the first sealing conical surface, the flow valve assembly is provided with the second sealing conical surface, the flow valve assembly is inserted and cooperated with the connecting pipe, and the first sealing conical surface and the second sealing conical surface are attached, and the fixing part is connected to the sheath tube and the flow valve assembly simultaneously, and is used to limit the first sealing conical surface and the second sealing conical surface from moving away from each other.

[0009] In the optional implementation, the first sealing conical surface is arranged on the inner pipe wall of the connecting pipe, and the second sealing conical surface is arranged on the outer surface of the flow valve assembly.

[0010] Based on the above scheme, when assembling, part of the flow regulating valve assembly is inserted into the connecting pipe, and is positioned through the lumen of the connecting pipe, so that the assembly is facilitated.

[0011] In an optional embodiment, the first sealing taper and the second sealing taper are both provided with a conical surface.

[0012] Based on the above scheme, the contact area of the first sealing taper and the second sealing taper is large, forming an annular sealing band, and the sealing effect is good. At the same time, when the connecting pipe and the flow valve assembly are inserted, the step of adjusting the relative position of the connecting pipe and the flow valve assembly in the circumferential direction is omitted, the assembly difficulty is reduced, and the assembly efficiency is improved.

[0013] In an optional embodiment, the fixing member is rotatably connected with one of the connecting pipe and the flow valve assembly, and the freedom of the fixing member from the connecting pipe or the flow valve in the direction away from each other of the connecting pipe and the flow valve assembly is limited; the other of the fixing member from the connecting pipe and the flow valve assembly is screwed.

[0014] Based on the above scheme, after the connecting pipe and the flow valve assembly are connected, the fixing member is rotated to fix the connecting pipe and the flow valve assembly together through the fixing member, and the first sealing taper and the second sealing taper are tightly fitted, that is, the sealing fit is realized during the process of fixing the connecting pipe and the flow valve assembly, the assembly efficiency is high, and the assembly quality is high.

[0015] In an optional embodiment, the flow valve assembly includes a valve body, a connecting pipe, a valve core, and a knob; the connecting pipe is connected with the valve body, the second sealing taper is provided on the connecting pipe, and the connecting pipe is inserted and matched with the connecting pipe; the valve core is rotatably installed inside the valve body, the knob is connected with the valve core, and the knob is used to drive the valve core to rotate relative to the valve body to adjust the flow of the valve body.

[0016] Based on the above scheme, in use, the connecting pipe is matched with the connecting pipe to realize the communication of the sheath pipe, the connecting pipe, the connecting pipe, and the valve body in sequence. When it is necessary to adjust the flow of the valve body, force is applied to the knob, the knob drives the valve core to rotate, the flow area of the channel on the valve core communicated with the valve body changes correspondingly, the flow adjustment is realized, and the operation is convenient and flexible. When the valve core is rotated to the set position, the valve body can also be blocked, and at this time the flow valve assembly is in a closed state.

[0017] In an optional embodiment, a limiting portion is protruded on the outer pipe wall of the connecting pipe, and the fixing member is rotatably installed on the connecting pipe; the limiting portion is used to contact with the fixing member to limit the fixing member from the end of the connecting pipe away from the valve body.

[0018] Based on the above scheme, after the butt joint pipe and the connecting pipe are plugged together, the fixing part is rotated, the fixing part is screwed with the connecting pipe, the plugging depth of the butt joint pipe and the connecting pipe gradually increases with the screwing range of the fixing part and the connecting pipe increasing, the matching area of the first sealing conical surface and the second sealing conical surface increases, and sealing matching is realized, so that the operation is convenient and fast.

[0019] In an optional embodiment, the fixing part comprises an integral limiting ring plate and a connecting sleeve, the limiting ring plate is located at one end of the connecting sleeve; the limiting ring plate is sleeved outside the butt joint pipe, the limiting ring plate is located between the limiting part and the valve body, the limiting part is used for contacting the limiting ring plate to limit the limiting ring plate from being separated from the butt joint pipe; and the connecting sleeve is screwed with the connecting pipe to be fixed.

[0020] Based on the above scheme, the structure design of the fixing part enables the limiting ring plate to contact the limiting part during rotation, so that the butt joint pipe is plugged into the connecting pipe by the limiting part, and the operation is convenient and reliable.

[0021] In an optional embodiment, an anti-skid part is arranged on the outer periphery of the connecting sleeve.

[0022] Based on the above scheme, when the connecting sleeve is rotated, the operator applies force to the anti-skid part, and the anti-skid part is not easy to slip, so that the operation is time-saving and labor-saving.

[0023] In an optional embodiment, the distal end of the sheath tube is provided with a water outlet hole.

[0024] Based on the above scheme, when the sheath tube is used to deliver liquid into the joint cavity during the operation, the liquid delivery pipe is connected with the flow valve assembly, flows into the sheath tube through the flow regulating valve, and is then discharged from the water outlet hole, so that liquid flow is convenient, and delivery is stable and reliable. The working state of the flow valve assembly is adjusted to realize flow regulation.

[0025] In a second aspect, the utility model provides a kind of arthroscope kit, the arthroscope kit includes:

[0026] The arthroscope assembly is plugged into the sheath tube.

[0027] The beneficial effects of the embodiments of the utility model include, for example:

[0028] In summary, the joint mirror sheath flow valve connecting structure provided by the embodiment, the connecting pipe on the flow valve assembly and the sheath pipe are connected together and fixed through the fixing piece, after assembly, the first sealing conical surface on the connecting pipe and the second sealing conical surface on the flow valve assembly are attached together to realize sealing cooperation. Due to the locking effect of the fixing piece, the first sealing conical surface and the second sealing conical surface can be effectively prevented from being always in the attached state, so that good sealing effect is always maintained. At the same time, due to the structural design of the first sealing conical surface and the second sealing conical surface, the contact area of the two is large, the sealing area is large, and the sealing effect is good. When long-term use causes wear, the insertion depth of the two can be increased, so as to compensate for the wear area, and the sealing failure is not easy to occur, the service life is long, and the use cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will be briefly introduced the drawings needed to be used in the embodiment, should understand, the following drawings only shows some embodiments of the utility model, therefore should not be regarded as the limited range, for the ordinary skilled person in the art, under the premise of not paying the creative labor, still can obtain other related drawings according to these drawings.

[0030] Figure 1 It is a schematic diagram of the joint mirror sheath flow valve connecting structure of the embodiment of the present application.

[0031] Figure 2 It is an exploded schematic diagram of the joint mirror sheath flow valve connecting structure of the embodiment of the present application.

[0032] Figure 3 It is a partial enlarged schematic diagram in Figure 2

[0033] Figure 4 It is a partial sectional view schematic diagram of the joint mirror sheath flow valve connecting structure of the embodiment of the present application.

[0034] Figure 5 It is a schematic diagram of the first working state of the joint mirror sheath flow valve connecting structure of the embodiment of the present application.

[0035] Figure 6 It is a schematic diagram of the second working state of the joint mirror sheath flow valve connecting structure of the embodiment of the present application.

[0036] Figure 7 It is a schematic diagram of the joint mirror assembly of the embodiment of the present application.

[0037] Figure 8 It is a schematic diagram of the joint mirror assembly of the embodiment of the present application.

[0038] Figure:

[0039] ​100 - sheath; 110 - head; 111 - connecting hole; 120 - tube; 121 - water outlet hole; 130 - buckle part; 131 - clamping protrusion; 132 - anti-skid groove; 200 - flow valve assembly; 210 - valve body; 211 - first hole; 212 - second hole; 220 - butt joint pipe; 221 - second sealing conical surface; 230 - valve core; 231 - flow hole; 240 - knob; 250 - assembling pipe; 260 - limiting part; 300 - connecting pipe; 310 - first sealing conical surface; 400 - fixing piece; 410 - limiting ring plate; 420 - connecting sleeve; 001 - arthroscopy assembly; 011 - clamping groove. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0042] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0043] In the description of the present application, it should be noted that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, which is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0044] In addition, if the terms "first", "second" and the like appear, they are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0045] It should be noted that the features in the embodiments of the present application can be combined with each other without conflict.

[0046] In the prior art, when the outer sheath of the arthroscopic kit is matched with the flow regulating valve, the flow regulating valve and the outer sheath are matched in a plug-in manner. In order to control the plug-in depth, a step is generally arranged in the outer sheath. The flow regulating valve is plugged in to the set depth and abuts against the step. The sealing is realized by the cylindrical surface cooperation. The sealing area is small, and the sealing effect is poor. After long-term use, the cylindrical surface is worn and the sealing failure is prone to occur.

[0047] In view of this, the designer provides an arthroscopic sheath flow valve connecting structure which can improve the sealing effect and reduce the probability of sealing failure.

[0048] Please refer to Figures 1-4 The embodiment provides an arthroscopic sheath flow valve connecting structure which comprises a sheath pipe 100, a flow valve assembly 200, a connecting pipe 300 and a fixing piece 400. The connecting pipe 300 is fixed to the pipe wall of the sheath pipe 100. The connecting pipe 300 is provided with a first sealing conical surface 310. The flow valve assembly 200 is provided with a second sealing conical surface 221. The flow valve assembly 200 is plugged in and matched with the connecting pipe 300. The first sealing conical surface 310 and the second sealing conical surface 221 are attached. The fixing piece 400 is connected to the sheath pipe 100 and the flow valve assembly 200 at the same time and is used for limiting the first sealing conical surface 310 and the second sealing conical surface 221 from moving away from each other.

[0049] As described above, the working mode of the arthroscopic sheath flow valve connecting structure provided by the embodiment is as follows:

[0050] In use, the liquid conveying equipment is connected with the flow valve assembly 200 together. The flow valve assembly 200 is opened. The liquid flow can be adjusted. Therefore, the liquid passes through the flow regulating valve into the sheath pipe 100 and then enters the joint cavity from the sheath pipe 100. Alternatively, the liquid in the joint cavity can be discharged from the flow regulating valve through the sheath pipe 100. The use state can be adjusted as required.

[0051] It should be noted that the flow valve assembly 200 is assembled with the connecting pipe 300 through the fixing piece 400. The first sealing conical surface 310 on the connecting pipe 300 and the second sealing conical surface 221 on the flow valve assembly 200 are attached together to realize the sealing cooperation. Due to the locking effect of the fixing piece 400, the first sealing conical surface 310 and the second sealing conical surface 221 can be effectively prevented from always being in the attached state. Therefore, the good sealing effect can be always maintained. At the same time, due to the structural design of the first sealing conical surface 310 and the second sealing conical surface 221, the contact area and the sealing area of the two are large, and the sealing effect is good. When wear is caused by long-term use, the plug-in depth of the two can be increased. Therefore, the wear area can be compensated for. The sealing failure is not prone to occur. The service life is long, and the use cost is low.

[0052] The details of the arthroscopic sheath flow valve connecting structure in the embodiments of the present application are described below.

[0053] Please refer to Figures 1-2 In the embodiment, optionally, the arthroscopic sheath flow valve connecting structure comprises a sheath tube 100, two flow valve assemblies 200, two connecting tubes 300 and two fixing members 400. The two connecting tubes 300 are fixed on the sheath tube 100, and the two connecting tubes 300 are arranged in a central symmetry. The first end of each connecting tube 300 is in communication with the lumen of the sheath tube 100. The two flow valve assemblies 200 are connected with the two connecting tubes 300 respectively. The second end of each connecting tube 300 is in communication with the corresponding flow valve assembly 200. The two fixing members 400 fix the paired connecting tube 300 and flow valve assembly 200 respectively.

[0054] Please refer to Figure 5 and Figure 6 It should be understood that the two connecting tubes 300 can be arranged in an integrated structure with the sheath tube 100, which is convenient for processing and manufacturing, has high overall strength, and has no joints to improve the sealing effect. Each connecting tube 300 can be arranged perpendicularly to the sheath tube 100, and the two connecting tubes 300 can be arranged coaxially, which has a regular structure and is convenient for processing. One of the two connecting tubes 300 can be a water inlet pipe, and the other can be a water outlet pipe. Correspondingly, the flow valve assembly 200 connected with the water inlet pipe is a water inlet valve, and the flow valve assembly 200 connected with the water outlet pipe is a water outlet valve. Specifically, when it is needed to introduce liquid into the joint cavity, the water inlet valve is opened, the water outlet valve is closed, and the infusion device is connected with the water inlet pipe, so that the liquid is input into the joint cavity from the water inlet pipe through the sheath tube 100. When it is needed to discharge the liquid in the joint cavity, the water outlet valve is opened, the water inlet valve is closed, and the liquid in the joint cavity is discharged from the sheath tube 100 through the water outlet pipe. Obviously, the flow valve assembly 200 matched with the water inlet pipe can adjust the liquid inflow when the liquid is introduced, and the flow valve assembly 200 matched with the water outlet pipe can adjust the liquid outflow when the liquid is discharged. When the liquid is discharged, a suction pump can be connected at the outlet of the corresponding flow valve assembly 200 to provide suction force, which is beneficial to the discharge of the liquid in the joint cavity.

[0055] It should be noted that each connecting tube 300, each flow valve assembly 200 and each fixing member 400 form a unit, and the structure and working mode of the two units can be set to be the same. In the embodiment, in order to avoid repeated and tedious description, only one unit is taken as an example for description.

[0056] Please refer to Figure 2 and Figure 3In the embodiment, optionally, the sheath tube 100 comprises a head portion 110 and a tube portion 120 connected together, the outer diameter of the tube portion 120 is smaller than that of the head portion 110, and the head portion 110 and the tube portion 120 can be provided as hollow cylindrical structures. The distal end of the head portion 110 is provided with a reduced diameter section, the proximal end of the tube portion 120 is inserted into the reduced diameter section and communicates with the head portion 110, so as to realize smooth connection of the head portion 110 and the tube portion 120. The tube wall of the head portion 110 is provided with two connecting holes 111 communicating with the hollow region, and one end of the two connecting tubes 300 respectively communicates with the two connecting holes 111. Meanwhile, the distal end of the tube portion 120 is an open end, for the distal end of the arthroscope assembly 001 to extend out. The tube wall of the tube portion 120 close to the distal end thereof is provided with a water outlet hole 121, and the number of the water outlet hole 121 can be one or more. When the number of the water outlet hole 121 is more than one, the plurality of water outlet holes 121 are uniformly and spacedly arranged around the axis of the tube portion 120.

[0057] It should be understood that the head portion 110 and the tube portion 120 can be provided as detachable connection, and the two are independently processed and then inserted into an interference fit, so as to reduce the processing difficulty and reduce the replacement cost.

[0058] Please refer to Figure 3 In some embodiments, optionally, the proximal end of the sheath tube 100 is further provided with two buckle portions 130, the two buckle portions 130 are integrally formed with the head portion 110, the buckle portion 130 is elastically connected with the tube wall of the head portion 110, the proximal end of the buckle portion 130 is provided with a clamping protrusion 131, and the distal end of the buckle portion 130 has a spacing with the outer peripheral surface of the head portion 110. By pressing the distal end, a certain angle of rotation can be generated at the connection position of the buckle portion 130 and the head portion 110, so as to drive the clamping protrusion 131 to move outwardly along the radial direction of the head portion 110, and make the clamping protrusion 131 away from the central position of the head portion 110. That is to say, in the initial state, the two clamping protrusions 131 are inwardly retracted, and the distance between the two clamping protrusions 131 is the smallest. In the process of inserting the arthroscope assembly 001 into the tube portion 120 from the head portion 110, the arthroscope assembly 001 first spreads the two clamping protrusions 131, and when the arthroscope assembly 001 is inserted to a set depth, the two clamping protrusions 131 are clamped and matched with the corresponding clamping grooves 011 on the arthroscope assembly 001, so as to realize the connection of the arthroscope assembly 001 and the sheath tube 100.

[0059] It should be understood that the number of the buckle portions 130 on the sheath tube 100 is not limited to two, but also can be one or more than three.

[0060] In order to prevent the far end of the buckle portion 130 from slipping when being pressed, an anti-skid groove 132 can be arranged on the outer side of the buckle portion 130. When the operator presses the anti-skid groove 132 with his fingers, the far end of the buckle portion 130 is brought close to the head portion 110, and the near end is away from the head portion 110. Thus, the operator can easily and conveniently disengage the buckle portion 130 from the arthroscope assembly 001.

[0061] Optionally, the connecting pipe 300 is a circular pipe, and the outer diameter of the connecting pipe 300 is smaller than the outer diameter of the head portion 110. At least part of the inner pipe wall of the connecting pipe 300 is arranged as a conical surface, thereby forming a first sealing conical surface 310. That is, the first sealing conical surface 310 is arranged on the inner pipe wall of the connecting pipe 300, and the first sealing conical surface 310 is arranged as a conical surface, which is convenient to process. Meanwhile, a first threaded portion is arranged on the outer pipe wall of the connecting pipe 300. For example, the end of the connecting pipe 300 away from the head portion 110 can be arranged as a luer joint.

[0062] Please refer to Figure 4 In this embodiment, optionally, the flow valve assembly 200 includes a valve body 210, a connecting pipe 220, a valve core 230, a knob 240, and an assembling pipe 250. The valve body 210 is arranged as a cylinder, and the valve body 210 is arranged with a coaxial first hole 211 and a second hole 212. The connecting pipe 220 is connected to the first hole 211 in communication, and the assembling pipe 250 is connected to the second hole 212 in communication. The valve core 230 is arranged with a flow hole 231, and the valve core 230 is rotatably installed in the valve body 210. The knob 240 is fixed on the valve core 230, and the knob 240 can drive the valve core 230 to rotate relative to the valve body 210. When the valve core 230 rotates, the flow hole 231 on the valve core 230 can move relative to the first hole 211 and the second hole 212. When the first hole 211, the flow hole 231, and the second hole 212 are sequentially aligned in communication, the flow of the valve body 210 is the largest. When the first hole 211 is blocked by the valve core 230, that is, the first hole 211 or the second hole 212 is not in communication with the flow hole 231, the flow of the valve body 210 is the smallest, and the valve body 210 is blocked. By rotating the valve core 230, the communication area of the first hole 211 or the second hole 212 with the flow hole 231 can be adjusted, thereby realizing flow adjustment, which is convenient to operate.

[0063] Meanwhile, at least part of the outer pipe wall of the connecting pipe 220 is arranged as a conical surface, which can also be referred to as a second sealing conical surface 221. The second sealing conical surface 221 can be a conical surface. The connecting pipe 220 is inserted into the connecting pipe 300, and the first sealing conical surface 310 and the second sealing conical surface 221 are in contact, thereby realizing sealing. Since the first sealing conical surface 310 and the second sealing conical surface 221 are conical surfaces, the step of adjusting the relative position of the connecting pipe 300 and the flow valve assembly 200 in the circumferential direction is omitted, thereby reducing the assembly difficulty and improving the assembly efficiency.

[0064] Further, a limiting portion 260 is arranged on the outer pipe wall of the connecting pipe 220, and the limiting portion 260 can be an annular protrusion extending around the axis of the connecting pipe 220.

[0065] Optionally, the end of the assembly pipe 250 can be provided as a luer joint, facilitating connection with an infusion device or a suction pump.

[0066] It should be understood that in other embodiments, the flow valve assembly 200 can also be a three-way valve or the like, which is not described in detail in the present embodiment.

[0067] Please refer to Figure 4 In the present embodiment, the fixing member 400 includes an integral limiting ring plate 410 and a connecting sleeve 420, the limiting ring plate 410 can be a circular ring plate, and the connecting sleeve 420 can be a circular cylinder. The limiting ring plate 410 is located at one end of the connecting sleeve 420, the other end of the connecting sleeve 420 is an open end, and the inner pipe wall of the connecting sleeve 420 is provided with a second threaded portion. The limiting ring plate 410 is sleeved outside the connecting pipe 220, and the limiting ring plate 410 is located between the limiting portion 260 and the valve body 210. The limiting portion 260 is used to contact the limiting ring plate 410 to limit the limiting ring plate 410 from separating from the connecting pipe 220 away from the one end of the valve body 210. The connecting sleeve 420 is sleeved outside the connecting pipe 300, and the first threaded portion and the second threaded portion are screwed and fixed. That is, the fixing member 400 is located on the connecting pipe 220, and the two can rotate relative to each other, but when the fixing member 400 moves towards the one end of the connecting pipe 220 away from the valve body 210, it can contact the limiting portion 260, thereby being limited by the limiting portion 260 to prevent the fixing member 400 from separating from the connecting pipe 220. In this way, during assembly, the connecting pipe 220 is inserted into the connecting pipe 300, the connecting sleeve 420 is screwed with the connecting pipe 300, and the length of the threaded cooperation between the connecting sleeve 420 and the connecting pipe 300 gradually increases with the rotation of the connecting sleeve 420. The depth of the limiting ring plate 410 inserted into the connecting pipe 300 by the limiting portion 260 gradually increases, and the first sealing conical surface 310 and the second sealing conical surface 221 are more tightly fitted. During the screwing and fixing of the connecting sleeve 420 and the connecting pipe 300, the first sealing conical surface 310 and the second sealing conical surface 221 are combined more and more tightly, and the sealing cooperation is completed when the connecting pipe 300 and the connecting pipe 220 are fixed, facilitating assembly.

[0068] It should be understood that in other embodiments, the fixing member 400 can be rotatably installed on the connecting pipe 300, and then the fixing member 400 is screwed and fixed with the connecting pipe 220, which is selected as needed and flexible in processing.

[0069] Since the limiting part 260 and the limiting ring plate 410 are both annular structures, they have a large contact area and are not easy to loosen, and are safe and reliable to use. When the limiting ring plate 410 rotates relative to the butt joint pipe 220, the limiting ring plate 410 can always be in contact with the limiting part 260, and the limiting effect of the limiting part 260 is good.

[0070] Optionally, the outer circumferential surface of the connecting sleeve 420 is provided with an anti-skid part, which can be an anti-skid groove or the like. When the connecting sleeve 420 is rotated, the operator applies force to the anti-skid part, which is not easy to slip, and the operation is time-saving and labor-saving.

[0071] The joint sheath flow valve connecting structure provided in the embodiment is connected with the connecting pipe 300 through the corresponding fixing part 400. The butt joint pipe 220 of the flow valve assembly 200 is inserted into the connecting pipe 300. The first sealing conical surface 310 and the second sealing conical surface 221 are matched. The connecting sleeve 420 of the fixing part 400 can be threadedly connected with the connecting pipe 300 by rotating the fixing part 400. With the increase of the threaded connection part, the depth of the butt joint pipe 220 inserted into the connecting pipe 300 increases, and the combination of the first sealing conical surface 310 and the second sealing conical surface 221 is more compact, so that the sealing cooperation is realized. Since the first sealing conical surface 310 and the second sealing conical surface 221 are both conical surfaces, when the butt joint pipe 220 is inserted into the connecting pipe 300, the circumferential relative position of the two does not need to be considered, which is convenient to operate. In addition, the two conical surfaces are combined tightly, and there is no gap, so that the sealing effect is good.

[0072] Please refer to Figure 7 and Figure 8 , the embodiment further provides a joint sheath kit, which comprises a joint sheath assembly 001 and a joint sheath flow valve connecting structure. The joint sheath assembly 001 is used to be inserted into the sheath pipe 100, that is, the joint sheath assembly 001 can be inserted into the sheath pipe 100 when in use, and the joint sheath assembly 001 is separated from the sheath pipe 100 when not in use.

[0073] Optionally, the outer circumferential surface of the joint sheath assembly 001 is provided with a clamping groove 011, which can be an annular groove. When the joint sheath assembly 001 is inserted from the head 110 of the sheath pipe 100, the joint sheath assembly 001 can be expanded by two clamping protrusions 131. When the insertion depth of the joint sheath assembly 001 meets the requirements, the two clamping protrusions 131 are inwardly folded and reset under the action of the elastic force, and are clamped in the clamping groove 011, so that the joint sheath assembly 001 and the sheath pipe 100 are positioned in the axial direction. Since the clamping groove 011 is an annular groove, after the joint sheath assembly 001 is inserted into the sheath pipe 100, the axial degree of freedom is limited, but the circumferential degree of freedom of the joint sheath assembly 001 and the sheath pipe 100 is not constrained, and the two can rotate relative to each other. When in use, the circumferential position can be adjusted as needed, and the use is flexible.

[0074] The above merely illustrates the specific implementation of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A connection structure for a flow valve of an arthroscopic sheath, characterized in that, include: The device comprises a sheath (100), a flow valve assembly (200), a connecting pipe (300), and a fixing member (400). The connecting pipe (300) is fixed to the wall of the sheath (100) and is provided with a first sealing conical surface (310). The flow valve assembly (200) is provided with a second sealing conical surface (221). The flow valve assembly (200) is inserted into the connecting pipe (300), and the first sealing conical surface (310) and the second sealing conical surface (221) are in contact. The fixing member (400) is connected to both the sheath (100) and the flow valve assembly (200) to limit the first sealing conical surface (310) and the second sealing conical surface (221) from moving away from each other.

2. The arthroscopic sheath flow valve connection structure according to claim 1, characterized in that: The first sealing conical surface (310) is disposed on the inner wall of the connecting pipe (300); the second sealing conical surface (221) is disposed on the outer surface of the flow valve assembly (200).

3. The arthroscopic sheath flow valve connection structure according to claim 1, characterized in that: Both the first sealing conical surface (310) and the second sealing conical surface (221) are provided with conical surfaces.

4. The arthroscopic sheath flow valve connection structure according to any one of claims 1-3, characterized in that: The fastener (400) is rotatably engaged with one of the connecting pipe (300) and the flow valve assembly (200), and the degree of freedom of the fastener (400) and the connecting pipe (300) or the flow valve in the direction that the connecting pipe (300) and the flow valve assembly (200) are away from each other is restricted; the fastener (400) is threadedly connected to the other of the connecting pipe (300) and the flow valve assembly (200).

5. The arthroscopic sheath flow valve connection structure according to claim 4, characterized in that: The flow valve assembly (200) includes a valve body (210), a connecting pipe (220), a valve core (230), and a knob (240); the connecting pipe (220) is connected to the valve body (210), the second sealing conical surface (221) is disposed on the connecting pipe (220), and the connecting pipe (220) is inserted into the connecting pipe (300); the valve core (230) is rotatably installed inside the valve body (210), and the knob (240) is connected to the valve core (230). The knob (240) is used to drive the valve core (230) to rotate relative to the valve body (210) to adjust the flow rate of the valve body (210).

6. The arthroscopic sheath flow valve connection structure according to claim 5, characterized in that: A limiting part (260) is provided on the outer wall of the connecting pipe (220), and the fixing member (400) is rotatably mounted on the connecting pipe (220); the limiting part (260) is used to contact the fixing member (400) to restrict the fixing member (400) from disengaging from the end of the connecting pipe (220) away from the valve body (210).

7. The arthroscopic sheath flow valve connection structure according to claim 6, characterized in that: The fixing component (400) includes an integral limiting ring plate (410) and a connecting sleeve (420). The limiting ring plate (410) is located at one end of the connecting sleeve (420). The limiting ring plate (410) is sleeved on the outside of the connecting pipe (220). The limiting ring plate (410) is located between the limiting part (260) and the valve body (210). The limiting part (260) is used to contact the limiting ring plate (410) to restrict the limiting ring plate (410) from disengaging from the connecting pipe (220). The connecting sleeve (420) is screwed and fixed to the connecting pipe (300).

8. The arthroscopic sheath flow valve connection structure according to claim 7, characterized in that: The outer circumferential surface of the connecting sleeve (420) is provided with an anti-slip part.

9. The arthroscopic sheath flow valve connection structure according to claim 1, characterized in that: The distal end of the sheath (100) is provided with a water outlet (121).

10. An arthroscopic kit, characterized in that, The arthroscopic kit includes: The arthroscopy assembly (001) and the arthroscopy sheath flow valve connection structure according to any one of claims 1-9; the arthroscopy assembly (001) is used for insertion into the sheath (100).

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