Auxiliary water supply pipe of endoscope and endoscope

Abstract

The utility model relates to the technical field of endoscopes, in particular to an endoscope auxiliary water supply pipe and an endoscope, which comprises a first connector, a second connector, a first water supply pipe, a second water supply pipe and a second water supply pipe, the second connector is inserted into the first connector, a through liquid inlet is formed in the end face of the liquid inlet end of the second connector, the end face of the liquid outlet end of the second connector is closed, a through liquid outlet is formed in the outer wall of the liquid outlet end, the through liquid outlet is communicated with the through liquid inlet, and the through liquid outlet is formed in the first connector; the elastic sleeve is elastically clamped between the outer wall of the second connector and the inner wall of the first connector, the elastic sleeve covers the through liquid outlet and the outer wall, close to the through liquid outlet, of the second connector, and the elastic sleeve is used for forming a water passing gap between the inner wall of the elastic sleeve and the outer wall of the second connector when the inner wall of the elastic sleeve is subjected to water flow pressure; and liquid backflow prevention is achieved through the arrangement of the water passing gap and the elastic sleeve.

Description

Technical Field

[0001] The utility model relates to the technical field of endoscopes, in particular to an endoscope auxiliary water supply pipe and an endoscope. Background Art

[0002] A medical endoscope is a medical device that can enter the human body through the natural orifice of the human body or through a small incision made during surgery to directly observe the changes in the relevant parts, and is commonly used for the examination and treatment of the gastrointestinal tract. When in use, in order to facilitate the operation and examination, the endoscope is equipped with a water injection function, which is realized by an external water supply pump and an auxiliary water supply pipe to deliver water flow to the inside of the endoscope.

[0003] In the prior art, when the water pump is started, water can be delivered to the endoscope system through the auxiliary water supply pipe. However, when water supply is not required, the water pump will stop working. At this time, the pressure inside the body is greater than the external pressure, which will cause body fluid to flow back, and it is easy to cause cross-infection during the use of the water supply device, bringing certain use safety problems.

[0004] Therefore, it is of practical value to study an endoscope auxiliary water supply pipe and an endoscope with an anti-backflow function. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an endoscope auxiliary water supply pipe and an endoscope to solve the problem that the existing endoscope auxiliary water supply pipe is prone to liquid backflow.

[0006] To solve the above technical problems, in the first technical solution, the utility model provides an endoscope auxiliary water supply pipe, including a pipe body, and is characterized by further comprising:

[0007] A first joint, which is detachably installed in the pipe body, and both ends of the first joint are through;

[0008] A second joint, which is inserted into the first joint. A through liquid inlet is provided on the end face of the liquid inlet end of the second joint, the end face of the liquid outlet end of the second joint is closed, and a through liquid outlet is provided on the outer wall of the liquid outlet end. The through liquid outlet is communicated with the through liquid inlet, and the through liquid outlet is arranged in the first joint;

[0009] An elastic sleeve, wherein the elastic sleeve is elastically clamped between the outer wall of the second joint and the inner wall of the first joint, the elastic sleeve covers the through-flow outlet and the outer wall of the second joint adjacent to the through-flow outlet, and the elastic sleeve is used to form a water-passing gap between the inner wall of the elastic sleeve and the outer wall of the second joint when the inner wall of the elastic sleeve is subjected to water flow pressure, and has a water-passing gap that is opened by water flow pressure. When water flows in, the external water flow pressure on the inner wall of the elastic sleeve is greater than the internal pressure of the endoscope, and the inner wall of the elastic sleeve will be compressed outward to form a water-passing gap. When water is not used, since the internal pressure is greater than the external pressure, the elastic sleeve will be squeezed toward the second joint to close the water-passing gap, thereby preventing liquid from flowing back.

[0010] In some embodiments of the first technical solution, a liquid inlet channel is provided in the second joint, and the liquid inlet channel is respectively connected with the through liquid outlet and the through liquid inlet; along the liquid inlet direction of the second joint, the diameter of the liquid inlet channel becomes narrower, and the liquid inlet channel with narrowing characteristics can make the water flow faster when passing through. When the water flow contacts the elastic sleeve, the elastic sleeve is subjected to greater pressure, which is conducive to the formation of a water-passing gap.

[0011] In some embodiments of the first technical solution, the liquid inlet channel includes a narrowed section, a constant diameter wide section and a constant diameter narrow section; along the liquid inlet direction of the second joint, the narrowed section, the constant diameter wide section and the constant diameter narrow section are arranged in sequence, and after the water flows through the narrowed short and variable diameter wide sections, the water forms a water column in the constant diameter narrow section, so that the elastic sleeve is subjected to greater pressure.

[0012] In some embodiments of the first technical solution, the second joint includes a joint block, a joint pipe and a joint arm; the joint block is arranged at the pipe mouth of the joint pipe, and a gap is left between the joint block and the joint pipe to form the through liquid outlet, and the joint block and the joint pipe are connected and fixed by the joint arm. After the through liquid outlet is formed by the joint block and the joint pipe, the water flow can move toward the through liquid outlet along the surface of the joint block after abutting the joint block, thereby avoiding the problem of excessive turbulence.

[0013] In some embodiments of the first technical solution, an annular inner flange is provided on the inner wall of the first joint; an annular first outer flange is provided on the outer wall of the liquid outlet; an annular second outer flange is provided on the outer wall of the elastic sleeve; the second outer flange is elastically clamped between the inner flange and the first outer flange, which can fix the position of the elastic sleeve on the one hand and better support the end of the elastic sleeve when under pressure on the other hand.

[0014] In some embodiments of the first technical solution, the endoscopic secondary water supply pipe further includes a valve body connector; the valve body connector is connected to the pipe body and the endoscopic system; the valve body connector is used to connect the pipe body to the endoscopic system in a manner that keeps the circumferential direction stationary. Connecting the pipe body in a circumferentially stationary manner can avoid the situation where the entire secondary water supply pipe rotates together during the tightening process of the existing thread. On the one hand, it is not easy to install, and on the other hand, it is likely to cause problems such as bending of the secondary water supply pipe and unsmooth water supply.

[0015] In some embodiments of the first technical solution, the valve body connector includes a valve seat, a valve core, a valve body connection head, and a fixing seat; both ends of the valve core are through, one end of the valve core is detachably installed in the pipe body, the other end of the valve core is arranged in the valve body connection head, the valve core is movably connected to the valve body connection head in a rotatable manner, and an anti-detachment outer flange is provided on the outer wall of the valve core; the valve body connection head is used for being fixedly connected to the endoscopic system; the valve seat is arranged on the outer side of the circumference of the valve core and the valve body connection head, the valve seat is threadedly connected to the valve body connection head, an anti-detachment inner flange is provided on the inner wall of the valve seat, the anti-detachment inner flange abuts against the anti-detachment outer flange, and the anti-detachment inner flange is arranged on the side adjacent to the pipe body; the fixing seat is sleeved outside the valve core, the fixing seat is arranged in the valve seat, and the valve core has the function of rotating in the valve seat and the valve body connection head, which is convenient for the installation of the water pipe.

[0016] In some embodiments of the first technical solution, the valve seat is provided with an installation through groove for the valve core to move radially, the length of the installation through groove is greater than the outer diameter length of the anti-detachment outer flange, the anti-detachment outer flange is radially movably installed in the installation through groove, and the anti-detachment inner flange for limiting is provided on the side wall of the installation through groove. With the design of the installation through groove, the valve core can be easily installed inside and can move inside, greatly facilitating the assembly.

[0017] In some embodiments of the first technical solution, the end of the valve body connection head adjacent to the valve core is provided with an annular inclined inner wall; the end of the valve core adjacent to the valve body connection head is provided with an annular inclined outer wall, and the inclined outer wall matches the shape of the inclined inner wall. After having the mutually matching inclined outer wall and inclined inner wall, the valve core and the valve body connection head are more tightly matched.

[0018] Second technical solution, the present invention provides an endoscope that applies the endoscopic secondary water supply pipe described in the first technical solution. After the water pipe with anti-backflow function is applied to the endoscope, it can avoid the situation of body fluid backflow and cross-infection of the water supply instrument.

[0019] The relatively prominent beneficial effects of the present invention are as follows:

[0020] 1. Since an elastic sleeve is provided in this solution, the elastic sleeve is elastically clamped between the outer wall of the second joint and the inner wall of the first joint. The elastic sleeve covers the through liquid outlet and the outer wall of the second joint adjacent to the through liquid outlet. The elastic sleeve is used to form a water passing gap between the inner wall of the elastic sleeve and the outer wall of the second joint when the inner wall of the elastic sleeve is subjected to water pressure. Therefore, when applied, when the water supply starts, after the water flows through the through liquid inlet of the second joint and enters, the water will exert water pressure on the inner wall of the elastic sleeve. At this time, the external pressure of the water is greater than the internal pressure, which will expand the gap between the elastic sleeve and the second joint, that is, a water passing gap will be formed between the inner wall of the elastic sleeve and the outer wall of the second joint. When the water supply stops, due to the internal pressure being greater than the external pressure, the elastic sleeve will be squeezed tightly towards the second joint to close the water passing gap, thereby preventing liquid backflow.

[0021] 2. Since a valve body connecting piece is provided in this solution, the valve body connecting piece can enable the pipe body to be connected to the endoscope system in a way that keeps it circumferentially stationary. Therefore, when applied, when the water pipe is disassembled and assembled, only the valve seat of the valve body connecting piece needs to be turned, and the water pipe can remain independent relative to the turning position, avoiding problems such as the entire secondary water supply pipe being driven to rotate together during the process of screwing tight the thread as in the prior art, being difficult to install, the secondary water supply pipe being bent, and the water supply being unsmooth.

[0022] 3. Since the endoscope in this solution uses a water pipe with functions of preventing backflow and preventing bending and twisting, when applied, using the endoscope can avoid problems such as liquid backflow and water pipe twisting, improving the use safety and convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 is a schematic cross-sectional view of one end of the pipe body provided by the preferred embodiment of the present invention;

[0025] Figure 2 is a detailed enlarged schematic cross-sectional view of one end of the pipe body provided by the preferred embodiment of the present invention;

[0026] Figure 3 is a schematic cross-sectional view of the other end of the pipe body provided by the preferred embodiment of the present invention;

[0027] Figure 4 is a schematic cross-sectional view when the valve body connecting piece is assembled provided by the preferred embodiment of the present invention Figure 1 ;

[0028] Figure 5 It is a schematic cross-section during the assembly of the valve body connector provided by the preferred embodiment of the present utility model. Figure 2 ;

[0029] Figure 6 It is a schematic diagram of an endoscope with an endoscopic auxiliary water supply pipe provided by the preferred embodiment of the present utility model.

[0030] The reference numerals are as follows:

[0031] 1. Pipe body;

[0032] 2. First joint; 20. Inner flange;

[0033] 3. Second joint; 30. Liquid inlet channel; 300. Narrowing section; 301. Constant diameter wide section; 302. Constant diameter narrow section; 31. Joint block; 32. Joint pipe; 33. First outer flange;

[0034] 4. Elastic sleeve; 40. Second outer flange; 41. Water passing gap;

[0035] 5. Valve body connector; 50. Valve seat; 500. Anti-detachment inner flange; 501. Installation through groove; 51. Valve core; 510. Anti-detachment outer flange; 511. Inclined outer wall; 52. Valve body connection head; 520. Inclined inner wall; 53. Fixed seat;

[0036] 6. Pipe clamp;

[0037] a. Endoscopic auxiliary water supply pipe; b. Endoscope body; c. Water pump. Specific embodiments

[0038] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0039] In the prior art, there are two major problems with the auxiliary water supply pipe. One is the problem that the liquid in the human body is prone to backflow under pressure, leading to cross-infection. The other is that the pipe body is prone to twisting and bending during the assembly or use of the auxiliary water supply pipe, which is inconvenient to use.

[0040] To solve the above problems, this solution proposes an endoscopic auxiliary water supply pipe. Please refer to Figures 1 to 2, including a pipe body 1, a first joint 2, a second joint 3 and an elastic sleeve 4. The first joint 2 is detachably installed inside the pipe body 1, and both ends of the first joint 2 are through. The second joint 3 is inserted into the first joint 2. A through liquid inlet is provided on the end face of the liquid inlet end of the second joint 3, the end face of the liquid outlet end of the second joint 3 is closed, and a through liquid outlet is provided on the outer wall of the liquid outlet end. The through liquid outlet is communicated with the through liquid inlet, and the through liquid outlet is arranged inside the first joint 2. The elastic sleeve 4 is elastically clamped between the outer wall of the second joint 3 and the inner wall of the first joint 2. The elastic sleeve 4 covers the through liquid outlet and the outer wall of the second joint 3 adjacent to the through liquid outlet. The elastic sleeve 4 is used to form a water passing gap 41 between the inner wall of the elastic sleeve 4 and the outer wall of the second joint 3 when the inner wall of the elastic sleeve 4 is subjected to water flow pressure.

[0041] When in application, when water supply is needed, water enters from the through liquid inlet of the second joint 3, and then squeezes the elastic sleeve 4 at the through liquid outlet. At this time, the external water flow pressure received by the elastic sleeve 4 is greater than the internal pressure of the endoscope, and the gap between the elastic sleeve 4 and the second joint 3 will be enlarged, that is, a water passing gap 41 will be formed between the inner wall of the elastic sleeve 4 and the outer wall of the second joint 3. When the water supply stops, due to the internal pressure being greater than the external pressure, the elastic sleeve 4 will be squeezed tightly towards the second joint 3 to close the water passing gap 41, thereby preventing liquid backflow. Further speaking, even if there is liquid reaching the end of the elastic sleeve 4, the liquid will squeeze the end of the elastic sleeve 4, causing it to compress towards the second joint 3, thereby closing the water passing gap 41 to prevent liquid backflow and avoid cross-infection of the water delivery instrument.

[0042] Regarding the above-mentioned pipe body 1, as Figure 1 and Figure 3 shown, one end of the pipe body 1 is installed with a first joint 2, a second joint 3 and an elastic sleeve 4, and the other end of the pipe body 1 is installed with a valve body connector 5. On the one hand, the pipe body 1 can realize the anti-backflow function through the cooperation of structures such as the first joint 2, the second joint 3 and the elastic sleeve 4, avoiding the possibility of cross-infection; on the other hand, it can realize the independent rotation function during the disassembly and assembly of the water pipe through the valve body connector 5, avoiding the situation that the water pipe is twisted like a "twisted rope" or bent during disassembly and assembly.

[0043] In addition, as Figure 1 shown, a deformable pipe clamp 6 is also provided on the pipe body 1. The auxiliary water delivery pipe can be clamped on the light guide hose through the pipe clamp 6 for easy cleaning. In order to make the pipe clamp 6 clamp more firmly, the diameter of the pipe clamp 6 is smaller than the diameter of the pipe body 1, and the pipe clamp 6 is also provided with a guiding part.

[0044] Regarding the above-mentioned first joint 2, as Figure 1 and Figure 2As shown, both ends of the first joint 2 are penetrated for water flow. The first joint 2 is detachably installed inside the pipe body 1. Among them, there are various ways for the first joint 2 to be detachably installed inside the pipe body 1. Exemplarily, the first joint 2 is inserted into the pipe body 1. The first joint 2 is provided with an anti - detachment structure in a trapezoidal shape, and the detachable installation is achieved by inserting and pulling out through the trapezoidal anti - detachment structure.

[0045] Regarding the above - mentioned second joint 3, as Figure 1 and Figure 2 shown, the second joint 3 is inserted into the first joint 2. The second joint 3 is provided with a through - liquid inlet for connecting to an external water supply mechanism. The end face of the liquid - outlet end of the second joint 3 is closed, and a through - liquid outlet is provided on the outer wall of the liquid - outlet end. The through - liquid outlet and the through - liquid inlet are connected through a liquid - inlet channel 30. The through - liquid outlet is arranged inside the first joint 2. After adopting this setting method, water cannot flow out from the end face of the liquid - outlet end of the second joint 3, but can only flow out from the side through - liquid outlet, cooperating with the elastic sleeve 4 to achieve the function of one - way flow.

[0046] Among them, there are also various ways for the second joint 3 to be inserted into the first joint 2. Exemplarily, the second joint 3 is inserted into the first joint 2 by a threaded connection method.

[0047] Regarding the liquid - inlet channel 30, as Figure 2 shown, the liquid - inlet channel 30 is arranged inside the second joint 3. The liquid - inlet channel 30 is respectively connected to the through - liquid outlet and the through - liquid inlet; along the liquid - inlet direction of the second joint 3, the diameter of the liquid - inlet channel 30 becomes narrower. After adopting this setting method, the liquid - inlet channel 30 with a narrowing characteristic, similar to a luer connector, can make the water flow faster when passing through. When the water flow contacts the elastic sleeve 4, the pressure received by the elastic sleeve 4 is greater, which is more conducive to the formation of the water - passing gap 41.

[0048] Specifically, as Figure 2 shown, the liquid - inlet channel 30 includes a narrowing section 300, a constant - diameter wide section 301, and a constant - diameter narrow section 302; along the liquid - inlet direction of the second joint 3, the narrowing section 300, the constant - diameter wide section 301, and the constant - diameter narrow section 302 are arranged in sequence. Among them, the constant - diameter narrow section 302 and the through - liquid outlet form a T - shaped water flow channel. After adopting this setting method, after the water flow passes through the narrowing section and the variable - diameter wide section, the water forms a water column in the constant - diameter narrow section 302, making the pressure received by the elastic sleeve 4 greater.

[0049] Regarding the through - liquid outlet, as Figure 2As shown, the through liquid outlet is formed by combining the joint block 31, the joint pipe 32 and the joint arm (not shown in the figure) of the second joint 3. The joint block 31 is arranged at the pipe orifice of the joint pipe 32. A gap is left between the joint block 31 and the joint pipe 32 to form the through liquid outlet. The joint block 31 and the joint pipe 32 are fixedly connected by the joint arm. After adopting this setting method, after the through liquid outlet is formed by the joint block 31 and the joint pipe 32, when the water flow abuts against the joint block 31, it can move along the surface of the joint block 31 towards the through liquid outlet direction, avoiding the problem that the water flow flows directly out at the bottom of the pipe, thus causing excessive turbulence.

[0050] Regarding the above-mentioned elastic sleeve 4, as Figure 2 shown, the elastic sleeve 4 is elastically clamped between the outer wall of the second joint 3 and the inner wall of the first joint 2. The elastic sleeve 4 covers the through liquid outlet and the outer wall of the second joint 3 adjacent to the through liquid outlet. The elastic sleeve 4 is used to form a water passing gap 41 between the inner wall of the elastic sleeve 4 and the outer wall of the second joint 3 when the inner wall of the elastic sleeve 4 is subjected to water flow pressure. After adopting this setting method, there is a water passing gap 41 that is opened under the water flow pressure. When water flows in, the external water flow pressure received by the inner wall of the elastic sleeve 4 is greater than the internal pressure of the endoscope, and the inner wall of the elastic sleeve 4 will be compressed outward, thus forming the water passing gap 41. When not using water, since the internal pressure is greater than the external pressure, the elastic sleeve 4 will be tightly squeezed towards the second joint 3 to close the water passing gap 41, thereby preventing liquid backflow. Even if the liquid flows to the elastic sleeve 4, the end of the elastic sleeve 4 can block the backflow of the liquid. Even if the liquid can exert pressure on the elastic sleeve 4, the elastic sleeve 4 will be compressed towards the second joint 3, thus closing the water passing gap 41, and the liquid cannot further flow back.

[0051] Exemplarily, the elastic sleeve 4 is preferably a silicone one-way membrane with elasticity. Of course, there are various choices for the elastic sleeve 4. As long as it can achieve elastic expansion and contraction in the medical field, those skilled in the art can select according to their actual needs.

[0052] Preferably, in order to better achieve the purpose of one-way flow, as Figure 2 shown, the elastic sleeve 4 covers the outer walls of all liquid outlet ends of the second joint 3. After adopting this setting method, the length of the elastic sleeve 4 is longer. When the elastic sleeve 4 is compressed, a larger range of the water passing gap 41 can be closed, and it is more difficult for the liquid to flow back.

[0053] Furthermore, in order to achieve good fixation of the elastic sleeve 4, as Figure 2As shown, an annular inner flange 20 is provided on the inner wall of the first joint 2; an annular first outer flange 33 is provided on the outer wall of the liquid outlet; an annular second outer flange 40 is provided on the outer wall of the elastic sleeve 4; the second outer flange 40 is elastically clamped between the inner flange 20 and the first outer flange 33. After adopting this arrangement, on the one hand, the position of the elastic sleeve 4 can be fixed by the cooperation of the three to avoid it from being washed off by water flow, and on the other hand, the end of the elastic sleeve 4 can provide better support when under pressure.

[0054] Regarding the above-mentioned valve body connector 5, as Figures 3 to 5 As shown, the valve body connector 5 is connected to the tube body 1 and the endoscope system; the valve body connector 5 is used to connect the tube body 1 to the endoscope system in a circumferentially stationary manner. After adopting this setting method, since the tube body 1 is connected in a circumferentially stationary manner, when assembling the water pipe, it is only necessary to screw the valve body connector 5. The water pipe can remain independent and will not rotate with the valve body connector 5. This can avoid the problem that the entire auxiliary water supply pipe will be driven to rotate during the existing thread tightening process, resulting in problems such as difficult installation, bending of the water pipe, and poor water supply.

[0055] Specifically, Figures 3 to 5 As shown, the valve body connector 5 includes a valve seat 50, a valve core 51, a valve body connector 52 and a fixed seat 53; both ends of the valve core 51 are connected, one end of the valve core 51 is arranged in the pipe body 1 in a detachable installation manner, and the other end of the valve core 51 is arranged in the valve body connector 52, the valve core 51 is movably connected to the valve body connector 52 in a rotatable manner, and an annular anti-falling outer flange 510 is provided on the outer wall of one end of the valve core 51; the valve body connector 52 is used to be fixedly connected to the endoscope system; the valve seat 50 is arranged outside the peripheral side of the valve core 51 and the valve body connector 52, the valve seat 50 is threadedly connected to the valve body connector 52, and the inner wall of the valve seat 50 is provided with an anti-falling outer flange 510 The fall-off inner flange 500, the anti-fall-off inner flange 500 abuts against the anti-fall-off outer flange 510, the anti-fall-off inner flange 500 is arranged on the side adjacent to the tube body 1, the fixing seat 53 is sleeved on the outside of the valve core 51, and the fixing seat 53 is arranged in the valve seat 50. After adopting this arrangement, during installation, one end of the valve core 51 is connected and fixed to the tube body 1, one end of the valve body connector 52 is connected to the endoscope system, and the other end of the valve core 51 is installed in the other end of the valve body connector 52. The valve core 51 and the valve body connector 52 are connected and installed through the valve seat 50. During and after the installation, the valve core 51 can rotate circumferentially, which is helpful for installation and use.

[0056] Among them, one end of the valve core 51 is detachably installed in the tube body 1 in various ways. For example, the valve core 51 is inserted into the tube body 1, and the valve core 51 is provided with a trapezoidal anti-detachment structure, and the detachable installation is achieved by inserting and removing the trapezoidal anti-detachment structure.

[0057] For the valve seat 50, as Figures 3 to 5 shown, the valve seat 50 is provided with a wide-diameter section and a narrow-diameter section of the valve seat 50. Along the direction away from the second joint 3, the wide-diameter section and the narrow-diameter section of the valve seat 50 are arranged in sequence. An installation through groove 501 and a thread for connecting with the valve body connector 52 are provided on the narrow-diameter section of the valve seat 50. The installation through groove 501 can allow the anti-detachment flange 510 of the valve core 51 to move radially. The length of the installation through groove 501 is greater than the outer diameter length of the anti-detachment flange 510. The anti-detachment flange 510 is radially movably installed in the installation through groove 501. An anti-detachment inner flange 500 for limiting is provided on the side wall of the installation through groove 501. After adopting this setting method, the valve core 51 can be easily installed in the installation through groove 501 and can move inside, as Figure 4 and Figure 5 shown, which facilitates the assembly.

[0058] For the valve core 51, as Figures 3 to 5 shown, one end of the valve core 51 connected to the pipe body 1 is provided with a trapezoidal anti-detachment structure, and the detachable installation is realized by inserting and extracting through the trapezoidal anti-detachment structure.

[0059] For the valve body connector 52, as Figures 3 to 5 shown, a thread for connecting with the valve seat 50 is provided on the outer wall of the valve body connector 52, and the other end of the valve body connector 52 is used for connecting with the endoscope system.

[0060] Furthermore, in order to make the valve core 51 and the valve body connector 52 fit more tightly, as Figures 3 to 5 shown, an annular inclined inner wall 520 is provided at one end of the valve body connector 52 adjacent to the valve core 51; an annular inclined outer wall 511 is provided at one end of the valve core 51 adjacent to the valve body connector 52. The inclined outer wall 511 and the inclined inner wall 520 are in a matching shape. After adopting this setting method, with the mutually matching inclined outer wall 511 and inclined inner wall 520, after the valve core 51 is inserted into the valve body connector 52, the valve core 51 and the valve body connector 52 fit more tightly.

[0061] Even further, the maximum diameter of the inclined outer wall 511 is greater than the maximum diameter of the inclined inner wall 520, as Figures 3 to 5 shown. After adopting this setting method, an interference fit connection and assembly state is realized, making the two fit more closely.

[0062] For the fixed seat 53, as Figures 3 to 5 shown, the fixed seat 53 is arranged between the valve core 51 and the valve seat 50. The fixed seat 53 can limit the swing of the valve core 51 in the valve seat 50 to avoid damage.

[0063] As can be seen from the above, the basic structure and principle of the auxiliary water supply pipe of the endoscope proposed in this solution will be described below in combination with specific applications.

[0064] This solution provides an endoscope system, as Figure 6 shown, including an endoscope body b, a light guide hose, an auxiliary water supply pipe a of the endoscope, a water pump c, a video adapter cable, a cold light source, an image processor, and a display. Among them, the water pump transports water into the endoscope body through the auxiliary water supply pipe of the endoscope for use. After adopting this setting method, the endoscope uses a water pipe with a backflow prevention function and an anti-bending and twisting function. Therefore, when in use, the endoscope can avoid problems such as liquid backflow and water pipe twisting, improving the safety and convenience of use.

[0065] The above is the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. An endoscope auxiliary water supply pipe, comprising a pipe body, characterized in that: Also includes: A first joint, the first joint is detachably mounted in the tube body, and two ends of the first joint are connected; A second joint, the second joint is inserted into the first joint, a through liquid inlet is provided on the end surface of the liquid inlet end of the second joint, the end surface of the liquid outlet end of the second joint is closed, a through liquid outlet is provided on the outer wall of the liquid outlet end, the through liquid outlet is connected with the through liquid inlet, and the through liquid outlet is provided in the first joint; An elastic sleeve, wherein the elastic sleeve is elastically clamped between the outer wall of the second joint and the inner wall of the first joint, the elastic sleeve covers the through liquid outlet and the outer wall of the second joint adjacent to the through liquid outlet, and the elastic sleeve is used to form a water-passing gap between the inner wall of the elastic sleeve and the outer wall of the second joint when the inner wall of the elastic sleeve is subjected to water flow pressure.

2. The endoscope auxiliary water supply pipe according to claim 1, characterized in that: A liquid inlet channel is provided in the second joint, and the liquid inlet channel is communicated with the through liquid outlet and the through liquid inlet respectively; Along the liquid inlet direction of the second joint, the diameter of the liquid inlet channel narrows.

3. The endoscope auxiliary water supply pipe according to claim 2, characterized in that: The liquid inlet channel comprises a narrowing section, a constant diameter wide section and a constant diameter narrow section; Along the liquid inlet direction of the second joint, the narrowed section, the constant diameter wide section and the constant diameter narrow section are arranged in sequence.

4. The endoscope auxiliary water supply pipe according to claim 1, characterized in that: The second joint comprises a joint block, a joint pipe and a joint arm; The joint block is arranged at the pipe opening of the joint pipe, a gap is left between the joint block and the joint pipe to form the through liquid outlet, and the joint block and the joint pipe are connected and fixed by the joint arm.

5. The endoscope auxiliary water supply pipe according to claim 1, characterized in that: An annular inner flange is provided on the inner wall of the first joint; An annular first outer flange is provided on the outer wall of the liquid outlet; An annular second outer flange is provided on the outer wall of the elastic sleeve; The second outer flange is elastically clamped between the inner flange and the first outer flange.

6. The endoscope auxiliary water supply pipe according to claim 1, characterized in that: The endoscope auxiliary water supply pipe also includes a valve body connector; The valve body connector is connected to the tube body and the endoscope system; The valve body connector is used to connect the tube body to the endoscope system in a manner of maintaining circumferential stillness.

7. The endoscope auxiliary water supply pipe according to claim 6, characterized in that: The valve body connector includes a valve seat, a valve core, a valve body connector and a fixed seat; The two ends of the valve core are connected, one end of the valve core is detachably mounted in the tube body, the other end of the valve core is disposed in the valve body connector, the valve core is rotatably connected to the valve body connector, and an anti-falling outer flange is disposed on the outer wall of the valve core; The valve body connector is used to be fixedly connected to the endoscope system; The valve seat is arranged outside the peripheral side of the valve core and the valve body connector, the valve seat is threadedly connected to the valve body connector, an anti-falling inner flange is arranged on the inner wall of the valve seat, the anti-falling inner flange abuts against the anti-falling outer flange, and the anti-falling inner flange is arranged on one side adjacent to the pipe body; The fixed seat sleeve is arranged outside the valve core, and the fixed seat is arranged inside the valve seat.

8. The endoscope auxiliary water supply pipe according to claim 7, characterized in that: The valve seat is provided with a mounting groove for radial movement of the valve core, the length of the mounting groove is greater than the outer diameter of the anti-falling outer flange, the anti-falling outer flange can be radially movably installed in the mounting groove, and the side wall of the mounting groove is provided with the anti-falling inner flange for limiting.

9. The endoscope auxiliary water supply pipe according to claim 7, characterized in that: An end of the valve body connector adjacent to the valve core is provided with an annular inclined inner wall; An end of the valve core adjacent to the valve body connector is provided with an annular inclined outer wall, and the inclined outer wall matches the inclined inner wall in shape.

10. An endoscope, characterized in that: The endoscope auxiliary water supply pipe as described in any one of claims 1 to 9 is used.

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