Endoscope fixation device

Abstract

The application discloses an endoscope fixing device, and belongs to the technical field of medical devices.The endoscope fixing device comprises a buckling main body, a spinning button and a clamping pipe.The buckling main body is provided with a through channel, the spinning button is in threaded connection with the buckling main body and drives a pushing body, and the clamping pipe comprises a first equal-diameter pipe section and an elastic second equal-diameter pipe section with a tapered surface.In use, the spinning button pushes the clamping pipe, the second equal-diameter pipe section is extruded by the tapered hole section, and the second equal-diameter pipe section is radially contracted to tightly hold the endoscope.The device realizes fixing and sealing through a mechanical structure, avoids relying on material elasticity, prevents falling and leakage, and can accurately control the force, thereby improving the operation stability and safety.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to an endoscope fixing device. BACKGROUND

[0002] As a medical device capable of deep into the human body cavity (such as digestive tract, respiratory tract, etc.) for examination, diagnosis and treatment, endoscope plays a vital role in the field of clinical medicine. In order to ensure the stability and safety of the examination or treatment process, the endoscope needs to be effectively fixed to avoid affecting the operation precision due to the displacement, shaking or falling of the endoscope, and even causing discomfort to the patient.

[0003] At present, the fixation of endoscope mainly includes two operation scenes and corresponding methods: one is short-time operation scene, in which the endoscope is directly inserted into the body cavity, and the operator completes the rapid examination by hand or simple positioning and then takes it out. This method does not need complex fixing structure because of short operation time; the other is long-time operation scene, in which the cavity needs to be sealed and the endoscope needs to be fixed by fixing device. The existing technology usually uses a fixing plug made of elastic material to realize the above functions - the fixing plug is inserted into the cavity, and the material itself is adhered to the inner wall of the cavity to form a seal and provide a fixing force.

[0004] However, the existing fixing plug used in long-time operation has the following technical defects:

[0005] (1) The fixing effect of the fixing plug completely depends on the elastic resistance of the material and the inner wall of the cavity. When there are liquid (such as body fluid), lubricant and other media in the cavity, the friction between the fixing plug and the inner wall of the cavity is greatly reduced, which easily leads to the falling of the fixing plug, resulting in the displacement or falling of the endoscope, and seriously affecting the operation continuity.

[0006] (2) The tightness of the fixing plug and the inner wall of the cavity is affected by the uniformity of the material elasticity, the shape of the inner wall of the cavity and other factors. In actual use, liquid leakage may occur due to the existence of the gap between the two, which not only pollutes the operation environment, but also may cause infection risk due to the reverse flow of the leaked liquid along the cavity.

[0007] (3) The fixing plug needs to be manually pressed into the cavity by the operator, and the pressing depth and the fixing force completely depend on the experience of the operator, which cannot be accurately controlled. If the pressing depth is too shallow, it may lead to fixing failure and poor sealing, and if the pressing depth is too deep, it may cause excessive compression to the inner wall of the cavity, resulting in pain and other discomfort of the patient.

[0008] The above defects directly lead to the fact that the existing fixing mode is difficult to meet the clinical needs, which may increase the operation difficulty, affect the examination or treatment efficiency, or even cause patient discomfort, increase the risk of infection, and reduce the treatment effect due to fixing failure or liquid leakage. Therefore, there is an urgent need for an endoscope fixing device that can solve the above problems. SUMMARY

[0009] The purpose of the present application is to provide an endoscope fixing device to solve the problems existing in the prior art and improve the fixing effect of the endoscope.

[0010] To achieve the above-mentioned purpose, the present application provides the following solutions:

[0011] The present application provides an endoscope fixing device, comprising:

[0012] The buckle body has a through channel coaxial with the buckle body;

[0013] The spinning button is used for threaded connection with the first end of the buckle body, and a propelling body is fixed on the spinning button. One end of the buckle body away from the first end is a second end, and the second end of the buckle body is provided with a connecting joint for detachable connection with a tubular interface of a medical instrument into which an endoscope needs to be inserted;

[0014] The clamping tube is used for being arranged in the through channel, and one end of the clamping tube away from the propelling body is made of elastic material. When the propelling body moves in the through channel towards the second end, the propelling body can push the clamping tube to move along the through channel, so that the one end of the clamping tube away from the propelling body is reduced in inner diameter under the action of interference with the inner wall of the through channel, so that the clamping tube clamps the endoscope.

[0015] Preferably, the through channel comprises a first constant-diameter hole section, a tapered hole section and a second constant-diameter hole section which are sequentially connected and coaxial. The hole diameter of the tapered hole section gradually decreases from one end close to the first constant-diameter hole section to the other end. The hole diameter of the first constant-diameter hole section is equal to the hole diameter of the larger end of the tapered hole section. The hole diameter of the second constant-diameter hole section is equal to the hole diameter of the smaller end of the tapered hole section. The first constant-diameter hole section is closer to the first end than the tapered hole section.

[0016] When the spinning button is threaded with the first end of the buckle body, the propelling body can extend into the first constant-diameter hole section, and the propelling body can slide along the axial direction of the first constant-diameter hole section;

[0017] The clamping pipe comprises coaxially arranged first and second equal-diameter pipe sections, the outer sidewall of the second equal-diameter pipe section is a tapered surface, the first equal-diameter pipe section is connected with the end of the second equal-diameter pipe section with a larger outer diameter, the taper of the outer sidewall of the second equal-diameter pipe section is equal to the taper of the tapered hole section; the outer diameter of the first equal-diameter pipe section and the maximum outer diameter of the second equal-diameter pipe section are equal and larger than the hole diameter of the second equal-diameter hole section; the second equal-diameter pipe section is made of elastic material.

[0018] Preferably, the propelling body is tubular, and the spinning button and the propelling body are rigid bodies; the surface of the spinning button is provided with anti-skid lines.

[0019] Preferably, the outer periphery of the spinning button is provided with a plurality of tooth-shaped protrusions distributed along the circumference of the spinning button, and all the tooth-shaped protrusions are asymmetrically distributed.

[0020] Preferably, the hardness of the first equal-diameter pipe section is greater than the hardness of the second equal-diameter pipe section.

[0021] Preferably, the material of the first equal-diameter pipe section is ABS plastic, and the material of the second equal-diameter pipe section is silica gel, TPE, TPU or rubber.

[0022] Preferably, the second equal-diameter pipe section is divided into an inner layer and an outer layer, the outer layer is farther away from the axis of the second equal-diameter pipe section than the inner layer, the material of the inner layer is antibacterial silica gel, and the material of the outer layer is wear-resistant TPU.

[0023] Preferably, the inner wall of the first equal-diameter pipe section and the inner wall of the second equal-diameter pipe section are both provided with a hydrophobic coating.

[0024] Preferably, the outer wall of the second equal-diameter pipe section is provided with a friction layer.

[0025] Preferably, the inner diameter of the first equal-diameter pipe section is equal to the inner diameter of the second equal-diameter pipe section.

[0026] The present application has the following technical effects relative to the prior art:

[0027] The endoscope fixing device of the application can make the second equal-diameter tube segment contract along the taper surface when driving the pusher by the spinning button, can enhance the fixation of the endoscope through the radial holding force, and can realize the close cooperation between the clamping tube, the clamping tube and the endoscope, eliminate the fitting gap, make the second equal-diameter tube segment of the clamping tube and the clamping tube seal, and the second equal-diameter tube segment of the clamping tube and the endoscope also seal, significantly improve the sealing performance, and eliminate the risk of liquid leakage and infection. In addition, the threaded connection of the spinning button and the clamping body realizes the quantitative control of the pushing depth and the clamping force, replaces the manual experience operation, avoids the problem of pressing too deep or too shallow, and at the same time, the inner antibacterial material, the outer wear-resistant material and the hydrophobic coating design further improve the safety and durability of the device, and the whole meets the needs of clinical fixation stability, sealing reliability and operation accuracy, reduces the operation difficulty and guarantees the patient comfort. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0029] Figure 1 It is a structural schematic diagram of the endoscope fixing device of the present application.

[0030] Figure 2 It is a structural schematic diagram of the clamping body in the endoscope fixing device of the present application.

[0031] In the figure: 1, clamping body; 11, through channel; 111, first equal-diameter hole segment; 112, taper hole segment; 113, second equal-diameter hole segment; 12, connecting joint;

[0032] 2, spinning button; 21, pusher;

[0033] 3, clamping tube; 31, first equal-diameter tube segment; 32, second equal-diameter tube segment. DETAILED DESCRIPTION

[0034] The technical solutions 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 embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0035] The endoscope fixing device of the present application can improve the fixing effect of an endoscope.

[0036] In order to make the above-mentioned objectives, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0037] As shown in Figure 1 and Figure 2 The endoscope fixing device of the present application can improve the fixing effect of an endoscope.

[0038] The clamping body 1 has a through channel 11 coaxial with the clamping body 1,

[0039] The spinning button 2 is used for threaded connection with the first end of the clamping body 1, and a propelling body 21 is fixed on the spinning button 2. One end of the clamping body 1 away from the first end is the second end, and the second end of the clamping body 1 is provided with a connecting joint 12 used for detachable connection with the tubular interface of a medical instrument requiring the insertion of an endoscope.

[0040] The clamping pipe 3 is used for being arranged in the through channel 11, and the end of the clamping pipe 3 away from the propelling body 21 is made of elastic material. When the propelling body 21 moves in the through channel 11 towards the direction of the second end of the clamping body 1, the propelling body 21 can extend into the through channel 11 and push the clamping pipe 3 to move along the through channel 11, so that the end of the clamping pipe 3 away from the propelling body 21 is reduced in inner diameter under the action of interference with the inner wall of the through channel 11, so as to clamp the endoscope.

[0041] In the present embodiment, the specific structure of the through channel 11 is as follows:

[0042] The through channel 11 includes a first constant-diameter hole section 111, a tapered hole section 112 and a second constant-diameter hole section 113 connected in sequence and coaxial. The hole diameter of the tapered hole section 112 gradually decreases from one end close to the first constant-diameter hole section 111 to the other end. The hole diameter of the first constant-diameter hole section 111 is equal to the hole diameter of the larger end of the tapered hole section 112, and the hole diameter of the second constant-diameter hole section 113 is equal to the hole diameter of the smaller end of the tapered hole section 112. The first constant-diameter hole section 111 is closer to the first end than the tapered hole section 112.

[0043] When the spinning button 2 is threaded with the first end of the clamping body 1, the propelling body 21 can extend into the first constant-diameter hole section 111, and the propelling body 21 can slide along the axial direction of the first constant-diameter hole section 111.

[0044] In the present embodiment, the specific structure of the clamping pipe 3 is as follows:

[0045] The clamping pipe 3 comprises a first equal-diameter pipe segment 31 and a second equal-diameter pipe segment 32 coaxially arranged, the outer side wall of the second equal-diameter pipe segment 32 is a tapered surface, the first equal-diameter pipe segment 31 is connected with the end of the second equal-diameter pipe segment 32 with a larger outer diameter, the taper of the outer side wall of the second equal-diameter pipe segment 32 is equal to the taper of the tapered hole segment 112, so that the clamping pipe 3 can move towards the second equal-diameter hole segment 113 under the pushing of the pusher 21, and after the second equal-diameter pipe segment 32 comes into contact with the tapered hole segment 112, the second equal-diameter pipe segment 32 can uniformly and elastically deform in the circumferential direction under the action of the tapered hole segment 112, so that the second equal-diameter pipe segment 32 can uniformly clamp the endoscope in the circumferential direction, thereby improving the stability of clamping; the outer diameter of the first equal-diameter pipe segment 31 and the maximum outer diameter of the second equal-diameter pipe segment 32 are equal and larger than the hole diameter of the second equal-diameter hole segment 113; the second equal-diameter pipe segment 32 is made of an elastic material.

[0046] In the embodiment, the outer side wall of the pusher 21 is provided with external threads, and the inner wall of the first equal-diameter pipe segment 31 is provided with internal threads, and the screw thread connection between the screw button 2 and the fastening main body 1 is realized through the cooperation of the external threads and the internal threads.

[0047] In the embodiment, the pusher 21 is tubular, and the pusher 21 is tubular for the convenience of passing through the endoscope, and the fastening main body 1, the screw button 2 and the pusher 21 are all rigid bodies, so that the pushing effect of the pusher 21 on the clamping pipe 3 can be ensured.

[0048] In the optional scheme of the embodiment, preferably, the surface of the screw button 2 is provided with anti-skid lines, and the anti-skid lines can increase the friction between the hand of the operator and the screw button 2, thereby preventing the operator from slipping when rotating the screw button 2.

[0049] In the optional scheme of the embodiment, preferably, the outer periphery of the screw button 2 is provided with a plurality of tooth-shaped protrusions distributed in the circumferential direction of the screw button 2, and all the tooth-shaped protrusions are asymmetrically distributed; the tooth-shaped protrusions themselves can facilitate the hand of the operator to exert force to rotate the screw button 2, and the asymmetric distribution of all the tooth-shaped protrusions can further facilitate the operator to exert force, thereby avoiding the operator from slipping when rotating the screw button 2, so as to improve the stability and reliability of the overall use of the device.

[0050] In the optional scheme of the embodiment, preferably, the hardness of the first equal-diameter pipe segment 31 is greater than the hardness of the second equal-diameter pipe segment 32, and the hardness of the first equal-diameter pipe segment 31 is greater than the hardness of the second equal-diameter pipe segment 32 because the elastic deformation mainly occurs in the second equal-diameter pipe segment 32, and the first equal-diameter pipe segment 31 does not need to elastically deform.

[0051] In an optional solution of the embodiment, preferably, the first equal-diameter tube segment 31 is made of ABS plastic, and the second equal-diameter tube segment 32 is made of silica gel, TPE, TPU or rubber.

[0052] In an optional solution of the embodiment, preferably, the second equal-diameter tube segment 32 is divided into an inner layer and an outer layer, the outer layer is farther away from the axis of the second equal-diameter tube segment 32 than the inner layer, the material of the inner layer is antibacterial silica gel, and the material of the outer layer is wear-resistant TPU; the inner layer directly contacts the endoscope outer wall and the body fluid and tissue in the through channel 11, the antibacterial silica gel has a self-bacteriostatic function (which can be realized by adding antibacterial ingredients such as silver ions), and can inhibit the breeding of bacteria at the contact interface. On the one hand, it avoids the breeding of bacteria in the gap between the endoscope outer wall and the inner layer, reduces the risk of retrograde infection along the endoscope outer wall; on the other hand, it reduces the biological pollution of the surface of the inner layer material caused by long-term contact with body fluids, especially suitable for long-time operation scenarios (such as continuous treatment for several hours), cuts off the infection path from the contact source, and makes up for the defects of the existing fixed plug, such as no antibacterial ability and easy to cause infection due to liquid leakage. At the same time, the antibacterial silica gel has excellent biocompatibility and elasticity, and the inner layer can maintain flexible contact when it is attached to the endoscope outer wall, avoiding abrasion to the scope body, and can shrink synchronously with the outer layer, without affecting the holding and fixing effect. The outer layer directly contacts the inner wall of the tapered hole segment 112, bears the core role of friction stress and sealing attachment, and TPU (thermoplastic polyurethane) has high wear resistance and tear resistance, compared with a single elastic material (such as pure silica gel), it can avoid damage and debris of the outer layer due to repeated friction, and ensure the structural integrity of the elastic tapered surface in long-term use. At the same time, the surface friction coefficient of TPU is stable, even if it contacts body fluids, lubricants and other media, it can still maintain effective friction with the inner wall of the tapered hole segment 112, reducing the problems of displacement and falling of the fixed plug caused by wear or friction coefficient reduction of the outer layer, and solving the defects of the existing fixed plug, such as relying on the elasticity of a single material and being prone to friction failure. In addition, the elastic recovery of TPU is suitable for the squeezing-expanding action of the tapered hole segment 112, the outer layer can stably attach to the inner wall of the tapered hole segment 112 to form a seal when it is squeezed, and it can quickly recover its shape after the squeezing is released, balancing the sealing reliability and the structural stability of repeated use. The inner layer and the outer layer complement each other in material properties, avoiding the performance limitations of a single material: if only silica gel is used, although the antibacterial property and flexibility meet the standards, the outer layer is prone to sealing failure due to wear; if only TPU is used, although the wear resistance is excellent, it lacks antibacterial function and has insufficient flexible attachment to the endoscope. The layered design focuses on “biological safety and flexible attachment” for the inner layer, and focuses on “wear-resistant fixation and sealing stability” for the outer layer, on the basis of ensuring the core function of elastic contraction / expansion of the second equal-diameter tube segment 32, it solves the three derivative problems of the existing fixed plug, i.e. “infection risk”, “friction failure” and “insufficient material durability”, significantly improving the reliability and safety of the device in long-term clinical operation.

[0053] In an optional solution of the present embodiment, preferably, the inner walls of the first constant-diameter tube segment 31 and the second constant-diameter tube segment 32 are provided with a hydrophobic coating. The inner wall of the clamping tube 3 (including the inner walls of the first constant-diameter tube segment 31 and the second constant-diameter tube segment 32) will contact the liquid carried by the outer wall of the endoscope, such as body fluid, lubricant, or irrigation fluid, in use. The hydrophobic coating repels liquid through low surface energy characteristics, making it difficult for liquid to remain on the tube wall (presenting a "non-wetting" state, with liquid droplets quickly sliding off). On the one hand, it avoids the accumulation of liquid on the tube wall to form a humid environment, which is a breeding ground for bacteria. In combination with the antibacterial silicone of the inner layer of the second constant-diameter tube segment 32, it forms a "physical anti-residue + chemical antibacterial" double protection, further reducing the risk of infection caused by liquid residue. On the other hand, it reduces the residue of liquid in the first constant-diameter tube segment 31 (near the operating end), avoids the formation of dirt adhesion after drying, reduces the difficulty of postoperative cleaning, especially for reusable devices, reduces stain residue during the cleaning process, and prolongs the service life of the device.

[0054] In an optional solution of the present embodiment, preferably, the outer wall of the second constant-diameter tube segment 32 is provided with a friction layer. The friction layer can increase the surface friction coefficient with the inner wall of the tapered hole segment 112, solve the problem of falling caused by reduced friction of the existing fixed plug, and enhance the stability of the endoscope fixation. At the same time, the material of the friction layer usually has a certain elastic deformation ability, which can fill the fitting gap, further improve the sealing effect in combination with the elastic expansion effect of the second constant-diameter tube segment 32, and reduce liquid leakage. In addition, stable friction makes the fixation force less affected by the medium, reducing the dependence on the operator's pressing experience, indirectly avoiding the operation risk caused by insufficient or excessive fixation force. In cooperation with the hydrophobic coating of the inner wall and the antibacterial design of the inner layer, it optimizes the clinical use effect from multiple dimensions of fixation, sealing, and operation safety.

[0055] In an optional solution of the present embodiment, preferably, the inner diameter of the first constant-diameter tube segment 31 is equal to the inner diameter of the second constant-diameter tube segment 32. Firstly, it avoids the formation of steps or size differences due to sudden changes in inner diameter, ensuring smooth sliding of the endoscope throughout the clamping tube 3, reducing the risk of frictional damage to the scope during operation, especially suitable for scenarios that require frequent adjustment of the position of the endoscope. Secondly, the equal inner diameter makes the fitting gap between the outer wall of the endoscope and the inner wall of the clamping tube 3 consistent along the axial direction, reducing the liquid leakage channels caused by uneven gaps, further improving the leakage prevention effect in combination with the sealing structure, while avoiding the formation of liquid accumulation dead angles due to excessive local gaps, reducing the risk of infection.

[0056] The specific use process of the endoscope fixation device of the present embodiment is as follows:

[0057] (1) Through the connection of the connecting joint 12 at the second end of the main body 1, the device is connected with the tubular interface of the medical instrument (such as a surgical catheter or an examination channel assembly) that needs to be inserted into the endoscope, ensuring firm docking (a buckle or threaded cooperation can be used), forming an operating base support, and avoiding displacement of the device as a whole;

[0058] (2) The endoscope is sequentially inserted through the center of the pusher 21 of the spinning button 2, the through channel 11 of the main body 1, and the inner hole of the clamping tube 3 (at this time, the clamping tube 3 is not squeezed, the inner hole diameter is larger, and it is easy to insert);

[0059] (3) Rotate the spinning button 2, use its threaded cooperation with the first end of the main body 1 to push the pusher 21 to move axially along the first constant-diameter hole section 111, and then squeeze the first constant-diameter tube section 31 of the clamping tube 3; under the action of the pushing force, the second constant-diameter tube section 32 of the clamping tube 3 slides along the taper hole section 112 of the main body 1 to the second end, and because the hole diameter of the taper hole section 112 gradually decreases, the second constant-diameter tube section 32 made of elastic material is squeezed by the taper, which synchronously produces two key effects:

[0060] ① Radial contraction to tightly hold the endoscope: the inner hole of the second constant-diameter tube section 32 contracts, fixing the endoscope through radial holding force, and avoiding axial or radial displacement of the endoscope;

[0061] ② Radial expansion to tightly fit the taper hole section 112: the outer wall of the second constant-diameter tube section 32 tightly fits the inner wall of the taper hole section 112, forming a tight seal;

[0062] During the spinning process, the pushing depth can be accurately controlled through the number of thread turns (such as 0.5 cm per 21 turns of the spinning button 21), until the hand feeling resistance is stable, and the spinning is stopped (the self-locking property of the thread can maintain the current state);

[0063] (3) If it is found during operation that the endoscope is slightly loose, the spinning button 2 can be further rotated at a small angle to enhance the holding force;

[0064] (4) After the examination or treatment is completed, the spinning button 2 is rotated in the opposite direction, the pusher 21 retreats, the second constant-diameter tube section 32 of the clamping tube 3 loses the squeezing, and the elasticity recovers (the inner hole expands and the outer wall contracts), releasing the holding of the endoscope; the endoscope is first pulled out from the clamping tube 3, and then the connection joint 12 is detached from the docking of the medical instrument, completing the entire operation.

[0065] In the present application, specific examples are applied to illustrate the principles and implementation modes of the present application. The above examples are only used to help understand the method and core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed. In summary, the content of the present application should not be understood as a limitation of the present application.

Claims

1. An endoscope fixation device, characterized in that, include: The fastening body has a through channel coaxial with itself; A rotary button is provided, which is used to be threadedly connected to the first end of the fastening body. A pusher is fixed on the rotary button. The end of the fastening body away from the first end is the second end. The second end of the fastening body is provided with a connecting connector, which is used to be detachably connected to the tubular interface of a medical device that needs to be inserted into an endoscope. A clamping tube is provided within the through channel. The end of the clamping tube away from the propulsion body is made of an elastic material. When the propulsion body moves within the through channel toward the second end, it can push the clamping tube to move along the through channel, causing the inner diameter of the end of the clamping tube away from the propulsion body to decrease under the interference of the inner wall of the through channel, so that the clamping tube clamps the endoscope. The through channel includes a first equal-diameter hole section, a tapered hole section, and a second equal-diameter hole section that are connected sequentially and coaxially. The diameter of the tapered hole section gradually decreases from one end closer to the first equal-diameter hole section to the other end. The diameter of the first equal-diameter hole section is equal to the diameter of the larger end of the tapered hole section, and the diameter of the second equal-diameter hole section is equal to the diameter of the smaller end of the tapered hole section. The first equal-diameter hole section is closer to the first end than the tapered hole section. When the rotary button is threadedly connected to the first end of the fastening body, the pusher can extend into the first equal diameter hole section, and the pusher can slide along the axial direction of the first equal diameter hole section; The clamping tube includes a first equal-diameter tube section and a second equal-diameter tube section arranged coaxially. The outer wall of the second equal-diameter tube section is tapered. The first equal-diameter tube section is connected to the end of the second equal-diameter tube section with the larger outer diameter. The taper of the outer wall of the second equal-diameter tube section is equal to the taper of the tapered hole section. The outer diameter of the first equal-diameter tube section and the maximum outer diameter of the second equal-diameter tube section are equal and larger than the hole diameter of the second equal-diameter hole section. The second equal-diameter tube section is made of an elastic material. The first equal-diameter pipe section has a higher hardness than the second equal-diameter pipe section; the first equal-diameter pipe section is made of ABS plastic; the second equal-diameter pipe section is divided into an inner layer and an outer layer, the outer layer being farther away from the axis of the second equal-diameter pipe section than the inner layer, the inner layer being made of antibacterial silicone, and the outer layer being made of wear-resistant TPU; both the inner walls of the first equal-diameter pipe section and the inner walls of the second equal-diameter pipe section are provided with a hydrophobic coating.

2. The endoscope fixation device according to claim 1, characterized in that: The propulsion body is tubular, and both the rotary button and the propulsion body are rigid bodies; the surface of the rotary button is provided with anti-slip texture.

3. The endoscope fixation device according to claim 1, characterized in that: The outer periphery of the rotary button is provided with a plurality of tooth-shaped protrusions distributed circumferentially along the rotary button, and all the tooth-shaped protrusions are asymmetrically distributed.

4. The endoscope fixation device according to claim 1, characterized in that: The outer wall of the second equal-diameter pipe section is provided with a friction layer.

5. The endoscope fixation device according to claim 1, characterized in that: The inner diameter of the first equal-diameter pipe section is equal to the inner diameter of the second equal-diameter pipe section.

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