Rotatable endoscope transparent cap

Abstract

The invention discloses a rotatable endoscope transparent cap, and relates to the technical field of endoscope transparent caps, the rotatable endoscope transparent cap comprises a transparent cap, a clamping device and a control device, the transparent cap is of an inner and outer ring structure, the clamping device is installed on the outer ring of the transparent cap of a double-ring structure, and the control device is connected to the transparent cap. The transparent cap can be matched with an endoscope to assist surgical operation, a doctor is helped to operate surgical instruments more conveniently, so that the surgical difficulty is reduced, the surgical time is shortened, the pressure of the doctor and the pain of a patient in the surgical process are relieved, and due to the unique structure of the transparent cap, the transparent cap has multiple functions, is suitable for different surgical requirements and is high in usability.

Description

Technical Field

[0001] The invention relates to the technical field of endoscope transparent caps, and in particular to a rotatable endoscope transparent cap. Background Art

[0002] During ESD surgery, the cut long mucosa is prone to collapse and block the surgical field of view due to lack of support, affecting the surgical operation, and the cut part cannot be recovered for pathological analysis after surgery. The doctor will use a transparent cap with a fixed additional foreign body forceps channel, insert a biopsy forceps or hemostatic clip, clamp the mucosa, and then use a mucosal cutter to continue the operation, using the newly added auxiliary instruments to pull and remove the diseased mucosa in the human body. These operations require a high level of operation from the surgeon. If the clamping angle is incorrect, the key part cannot be clamped, it is easy to slip, or it is not enough to fully expose the bottom mucosa, it will increase the difficulty of the operation, prolong the operation time, and even easily cause damage to the patient's body.

[0003] The current transparent cap cannot simultaneously allow for the addition of additional surgical instruments and adjustment of the angle of operation of the instruments. The only way to adjust the angle is to rotate the entire endoscope or remove the endoscope lens and reinstall the transparent cap. This will cause the endoscope to lose the view of the lesion and need to be searched again, greatly increasing the operation time and difficulty of the operation, causing physical discomfort to the patient and low surgical efficiency. Summary of the invention

[0004] Purpose of the invention: The technical problem to be solved by the present invention is to provide a rotatable transparent cap for an endoscope, which solves the problem that the existing transparent cap cannot additionally support surgical instruments and the surgical instruments cannot adjust their angles.

[0005] Technical Solution

[0006] To solve the above problems, the technical solution provided by the present invention is:

[0007] A rotatable endoscope transparent cap comprises a transparent cap, a clamping device and a control device, wherein the clamping device is mounted on the transparent cap, the control device is connected to the end of the transparent cap, the transparent cap comprises an inner ring and an outer ring, the side wall of the outer ring is bent and fixed on the side wall of the inner ring, the clamping device comprises a clamping head and a clamping ear, the clamping ear is fixedly connected to one side of the clamping head, and the clamping ear is inserted into the gap between the outer ring and the inner ring on the transparent cap.

[0008] Furthermore, the chuck is also provided with a plurality of rollers arranged in parallel, and the rollers rotate on the side of the outer ring. The chuck is provided with a clamping hole running through the upper and lower parts, and the clamping hole is provided with an internal thread. An elastic silicone gasket is provided on the upper side of the internal thread in the clamping hole. The chuck is a single chuck or a double chuck.

[0009] Furthermore, a wire passing hole is provided on the side wall of the bending part of the outer ring, and a wire binding hole is provided on the clamping ear.

[0010] Furthermore, a fixing piece is provided on the lower side of the inner ring side surface between the bent side walls of the outer ring, and a wire tube hole is provided on the fixing piece.

[0011] Furthermore, the control device comprises a wire-passing tube and a handle, the wire-passing tube is clamped in the wire-passing tube hole, and the handle is connected to the lower side of the wire-passing tube.

[0012] Furthermore, the handle is composed of a handle housing and an intermediate shaft installed in the handle housing, the intermediate shaft rotates on the handle housing, and the intermediate shaft slides axially in the handle housing.

[0013] Furthermore, two parallel ratchet wheels are arranged on the intermediate shaft, and two internal meshing gears corresponding to the parallel ratchet wheels are arranged in the handle housing.

[0014] Furthermore, the two internally meshing gears and the two ratchets are respectively located on both sides of the handle and are meshed on the same side, and only any one of the two ratchets can mesh with the corresponding internally meshing gear at the same time.

[0015] Furthermore, traction ropes are fixedly connected to both sides of the wire binding hole, and the traction ropes on both sides respectively pass through the wire through hole and the wire through tube, and are connected to the internal meshing gear of the handle housing.

[0016] Furthermore, the clamping device is replaced by a support sleeve, which is composed of three layers of rubber rings connected in sequence, namely, from bottom to top, a first layer of rubber ring, a second layer of rubber ring, and a third layer of rubber ring. The third layer of rubber ring is provided with a fixing sheet, the first layer of rubber ring is provided with a fixing hole that can cooperate with the fixing sheet, the third layer of rubber ring is provided with a bracket, and the bracket is composed of a number of independent support frames distributed in an annular manner in the third layer of rubber ring. The several independent support frames of the bracket are in a retracted state when the bracket is not in use. When the support sleeve is used, the second layer of rubber ring is retained in the gap between the inner ring and the outer ring, the first layer of rubber ring is folded upward to the outside of the outer ring, and then the third layer of rubber ring is folded downward, the fixing sheet on the third layer of rubber ring is inserted into the fixing hole of the first layer of rubber ring, and the bracket is opened.

[0017] Beneficial Effects

[0018] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0019] The technical solution provided by the present invention consists of a transparent cap, a clamping device and a control device. The transparent cap is an inner and outer ring structure. The clamping device is installed on the outer ring of the transparent cap with a double ring structure. The control device is connected to the transparent cap. The present invention can cooperate with endoscope-assisted surgical operations to help doctors operate surgical instruments more conveniently, thereby reducing the difficulty of surgery, reducing the operation time, and alleviating the pressure of doctors and the pain of patients during the operation. In addition, the present invention is multifunctional due to the unique structure of the transparent cap, suitable for different surgical needs, and has strong usability.

[0020] By pulling the clamping device through the control device, the angle adjustment of the external surgical auxiliary instrument can be achieved. The clamping device can also additionally fix the surgical instrument. The rotation function facilitates the control of the operating angle of the auxiliary instrument. The chuck and the handle have a self-locking function, which reduces the difficulty of operation. The detachable parts increase the practicality of the transparent cap. The inner and outer ring structural design of the transparent cap can add many additional functions to the transparent cap, increasing the functionality of the transparent cap. Different chuck designs can achieve different surgical effects, and the silicone sleeve with a support arm can open the folds of the inner wall of the intestine, greatly increasing the usability of the transparent cap. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of embodiment 1 of the present invention;

[0022] Figure 2 This is a schematic structural diagram of a transparent cap according to Embodiment 1 of the present invention;

[0023] Figure 3 is a schematic diagram of a clamping device according to Embodiment 1 of the present invention;

[0024] Figure 4 is a cross-sectional view of a clamping device according to embodiment 1 of the present invention;

[0025] Figure 5 This is a schematic diagram of a multi-chuck according to Embodiment 1 of the present invention;

[0026] Figure 6 This is a schematic diagram of a wire guide tube according to Embodiment 1 of the present invention;

[0027] Figure 7 A schematic diagram of a handle of a control device according to Embodiment 1 of the present invention;

[0028] Figure 8 Schematic diagram of the intermediate shaft and ratchet wheel of Example 1 of the present invention;

[0029] Fig. 9 This is a cross-sectional view of the handle of Example 1 of the present invention with the intermediate shaft removed;

[0030] Fig.10 is a schematic diagram of a support sleeve according to Embodiment 1 of the present invention;

[0031] Fig.11 It is a schematic diagram of the bottom view of the support sleeve of Example 1 of the present invention;

[0032] Fig.12 This is a schematic diagram of the use of the support sleeve of Example 1 of the present invention. DETAILED DESCRIPTION

[0033] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Example 1

[0035] Combined with Figure 1-12 A rotatable transparent cap of an endoscope is mainly used to directly adjust the position of surgical instruments during surgery, such as the position of a biopsy forceps or a hemostatic clip on an endoscope, so that there is no need to rotate the endoscope, or there is no need to take out the endoscope during surgery to adjust the position of the biopsy forceps or the hemostatic clip, thereby adjusting the position of the endoscope. The endoscope is composed of a transparent cap 1, a clamping device 2, and a control device 3. The clamping device 2 is installed on the transparent cap 1, and the control device 3 is also installed on the side of the clamping device 2. The control device 3 controls the clamping device 2 to move on the transparent cap 1 through a connecting line, thereby realizing the position adjustment of the clamping device 2 on the transparent cap 1.

[0036] The transparent cap 1 is the basic structure of the device. The transparent cap 1 consists of an inner ring 11 and an outer ring 12. The outer ring 12 is sleeved on the outside of the inner ring 11. The inner ring 11 is a cylindrical shell structure. The outer ring 12 is a partial cylindrical structure. The outer ring 12 is an incomplete cylinder. A notch is provided on the outer ring 12. The side wall of the outer ring 12 is directly connected to the side wall of the inner ring 11 at the notch position of the outer ring 12. A fixing part 15 is also provided at the notch position of the outer ring 12 at the bottom of the inner ring 11.

[0037] An equidistant gap is provided between the inner ring 11 and the outer ring 12. The outer ring 12 is fixed to the inner ring 11 by bending the side walls on both sides of the gap toward the inner ring 11 and connecting to the side walls of the inner ring 11 to form a stable integrated structure.

[0038] The gap between the outer ring 12 and the inner ring 11 is used to install the clamping device 2 , and the clamping device 2 can be stuck in the gap between the outer ring 12 and the inner ring 11 , so as to realize the movement of the clamping device on the outer ring 12 .

[0039] The gap in the outer ring 12 is used to provide space for installing the control device 3. The smaller the gap in the outer ring 12 is, the better, as long as the control device 3 can be installed without affecting the normal use of the control device 3. The smaller the gap in the outer ring 12 is, the greater the angle at which the clamping device 2 can move circumferentially on the outer ring 12, and the larger the adjustment range of medical staff will be, which can meet the use requirements of a larger angle.

[0040] The clamping device 2 consists of a clamp 21 and a clamp ear 22 extending from the clamp 21. The clamp ear 22 is fixed on the clamp 21 and forms an integral structure with the clamp 21. The clamp ear 22 is formed by bending the top of the clamp 21 to the side. The top of the clamp ear 22 and the clamp 21 are fixedly connected. The main part of the clamp ear 22 is parallel to the clamp 21 and there is a gap between the main part of the clamp ear 22 and the clamp 21.

[0041] The clamping head 21 of the clamping device 2 is hung on the outer ring 12 of the transparent cap 1 through the clamping ear 22. The clamping ear 22 is inserted into the gap between the inner ring 11 and the outer ring 12. The end of the clamping ear 22 connected to the clamping head 21 is hung on the side wall of the outer ring 12.

[0042] The chuck 21 is also provided with a plurality of rollers 25 which are arranged in parallel on the chuck 21 . The rollers 25 are embedded in the chuck 21 and can rotate freely. The rollers 25 are used to reduce the friction force of the chuck 21 moving on the outer ring 12 . A distance is reserved between the side of the roller 25 and the clamping ear 22 , and the rollers 25 rotate on the side of the outer ring 12 .

[0043] A fixing buckle matching structure is combined on the lower side of the chuck 21 and the clamping ear 22. The fixing buckle is used to limit the chuck 21 so that the chuck 21 will not fall off the outer ring 12. A protruding buckle is provided on the lower side of the clamping ear 22, and a fixing buckle is provided on the lower side of the chuck 21. A groove for the sliding of the fixing buckle is provided on the lower side of the chuck 21. An elastic silicone sheet is provided in the groove. The fixing buckle slides downward in the groove. The fixing buckle is combined with the protruding buckle, thereby forming a complete ring structure with the chuck 21 and the clamping ear 22. The ring structure of the chuck 21 and the clamping ear 22 is sleeved on the side wall of the outer ring 12, and the chuck 21 will not fall off the outer ring 21 at this time.

[0044] The elastic silicone sheet maintains a continuous stretching force, thereby being able to give the fixing buckle a continuous downward push, and at this time the fixing buckle can maintain a combined state with the protruding buckle, so that the ring structure formed by the clamp 21 and the clamp ear 22 cannot be released.

[0045] When it is necessary to release the ring structure formed by the chuck 21 and the clamping ear 22 and remove the chuck 21 from the outer ring 12, it is only necessary to push the fixing buckle upwards, and the fixing buckle slides on the inner side of the slot. At this time, the fixing buckle and the protruding buckle are released from the combined state. At this time, it is only necessary to slightly pull the clamping ear 22 outwards to remove the chuck 21 from the outer ring 12.

[0046] A clamping hole is provided in the chuck 21 which runs through from top to bottom. The clamping hole is used to install a foreign body clamp tube and surgical instruments. For example, instruments such as biopsy forceps or hemostatic clamps can be installed and fixed in the clamping hole. An internal thread is provided in the clamping hole. An elastic silicone gasket 28 is provided on the upper side of the internal thread in the clamping hole. The head of the foreign body clamp tube has an external thread to cooperate with it. The foreign body clamp tube is inserted into the clamping hole. When the internal thread in the clamping hole contacts the external thread on the foreign body clamp tube, the foreign body clamp tube is rotated. By compressing the deformation of the silicone gasket, the position of the surgical instrument in the pipeline and the fixation of the extended length can be controlled, which is convenient for the doctor's operation. Since the distance that the instrument needs to move during the operation is small, the movement and fixation of the surgical instrument in the chuck 21 can be satisfied by compressing the elastic silicone gasket 28.

[0047] The clamp 21 is detachable, and different transparent cap functions can be achieved by designing and installing different clamps.

[0048] The chuck 21 can be divided into a single chuck and a multi-chuck. The single chuck is provided with only one clamping hole, while the multi-chuck can be provided with multiple clamping holes, so as to achieve the function of installing multiple instruments on one chuck. The structure on the multi-chuck is the same as that on the single chuck, only the number of clamping holes is increased.

[0049] A wire-passing hole 14 is provided on the fixing piece 15 located at the lower side of the notch of the outer ring 12 of the transparent head 1 , and the wire-passing hole 14 passes through the fixing piece 15 .

[0050] The control device 3 is composed of a handle 31 and a wire-passing tube 32. The wire-passing tube 32 is installed on the transparent head 1. The handle 31 is connected to the end of the wire-passing tube 32. The wire-passing tube 32 is provided with a stopper for being inserted into the wire-passing tube hole 14. The wire-passing tube 32 can be split into two parts. The wire-passing tube 32 after splitting is composed of a stopper and a tube body. The stopper passes through the wire-passing tube hole 14. The stopper part that passes through the wire-passing tube hole 14 and extends out is fixedly combined with the tube body again to form the wire-passing tube 32. The wire-passing tube 32 is used to provide a pipeline structure for installing a traction rope for pulling the clamping device 2 to move on the transparent cap 1. The transparent tube 32 facilitates the handle 31 to control the pulling direction and pulling length of the traction rope.

[0051] The handle 31 connected to the end of the wire tube is the power component of the traction rope. The handle 31 can directly control the pulling direction and pulling length of the traction rope, and is used to control the position of the clamping device 2 on the transparent cap 1 by operating the handle 31.

[0052] A wire binding hole 26 is provided on the clamping ear 22. After the clamping device 2 is installed on the transparent cap 1, the wire binding hole 26 is inserted into the gap between the inner ring 11 and the outer ring 12. At this time, traction ropes in two opposite directions are respectively connected to both sides of the wire binding hole 26. By pulling the traction ropes in different directions, the clamping ear 22 and the clamping head 21 can be driven to move in the pulling direction on the transparent cap 1, thereby realizing the position adjustment of the clamping device 2.

[0053] Wire holes 13 are provided on the wall bodies on both sides of the notch position of the outer ring 12 for connecting the side walls of the inner ring 11. The traction ropes connected to the wire binding holes 26 on the clamping ears 22 and connected on both sides pass through the gap between the inner ring 11 and the outer ring 12, and are led out through the wire holes 13 respectively provided on the side walls on both sides of the notch position of the outer ring 12. A wire tube 32 is installed on the lower side of the notch position of the outer ring 12. The wire tube 32 is provided with channels for the movement of traction ropes in two different directions. After being led out from the wire holes 13, the traction ropes enter different channels in the wire tube 32 and are connected to the handle 31.

[0054] The handle 31 includes a handle housing 311, in which an intermediate shaft 313 is rotatably provided. One side of the intermediate shaft 313 extends out of the handle housing 311. A knob 312 is provided on the intermediate shaft 313 on the side extending out of the handle housing 311. The intermediate shaft 313 can not only rotate on the handle housing 311, but also slide in the axial direction on the handle housing 311. A sleeve can be provided between the intermediate shaft 313 and the handle housing 311 to realize the rotation and sliding functions of the intermediate shaft 313. The intermediate shaft 313 is installed inside the sleeve, and the sleeve does not need to slide. The intermediate shaft 313 only needs to slide relative to the sleeve. The sleeve and the intermediate shaft 313 are key-matched. When the intermediate shaft 313 rotates, the sleeve is synchronously driven to rotate. At this time, the intermediate shaft 313 can be rotated relative to the handle housing 313.

[0055] Two ratchet wheels 314 arranged in parallel are arranged on the intermediate shaft 313 , and the two ratchet wheels 314 arranged inside the handle housing 311 are respectively arranged on both sides of the intermediate shaft 313 .

[0056] Inside the handle housing 311 , there are internal meshing gears 315 rotatably arranged on both sides of the intermediate shaft 313 and respectively matched with the two ratchet wheels 314 . The internal meshing gears 315 on both sides are also internal meshing gears with different directions and are arranged corresponding to the directions of the two ratchet wheels 314 .

[0057] Only one of the two ratchet wheels 314 can mesh with a corresponding internal gear 315. The user can select the ratchet wheel 314 on either side to mesh with the corresponding internal gear 315 by sliding the intermediate shaft 313. The knob 312 is used to facilitate the user to pull and rotate the intermediate shaft 312. The knob is provided with an arc-shaped cross bar to facilitate the user to apply force with his fingers to pull the intermediate shaft 312.

[0058] The traction line is introduced into the handle 31 through the wire tube 32. The traction lines on both sides introduced into the handle 31 are fixedly wound around the internal gears 315 on both sides. After the internal gears 315 are meshed with the corresponding ratchet wheels 314, the rotation of the intermediate shaft 312 can drive the internal gear 315 on the side meshed with the ratchet wheel 314 to rotate. The rotation of the internal gear 315 pulls the traction line so that the clamping ear 22 drives the clamping head 21 to move in the direction of the traction rope connected to the rotating internal gear 315, thereby realizing the rotation of the clamping device 2 on the transparent cap 1.

[0059] When the clamping device 2 needs to be moved in the opposite direction, the principle is the same as the above-mentioned pulling principle. The medical staff only needs to pull the intermediate shaft toward the other side through the knob 312. At this time, the ratchet 314 on the other side is engaged with the internal gear 315 on the other side of the handle housing 311. At this time, the intermediate shaft 313 is rotated in the opposite direction, so that the intermediate shaft 313 drives the ratchet 314 to rotate, thereby driving the internal gear 315 on the other side to rotate. At this time, the internal gear 315 on the other side rotates and drives the clamping device 2 to move in the opposite direction.

[0060] The different rotation directions of the internal gears 315 on both sides can achieve the effect of pulling the clamping device 2 to move in different directions. By winding the traction line on the internal gears 315 in different directions, the internal gears 315 on both sides can rotate in different directions to pull the traction rope, thereby further achieving the function of pulling the clamping device.

[0061] In the above technical solution, the clamping device 2 is moved by rotating the intermediate shaft in different directions to pull the traction rope in order to facilitate the medical staff to adjust the direction, which is more in line with the habit of use.

[0062] The traction line is preferably made of nylon rope, which is convenient for doctors to install and disinfect and is not easy to break.

[0063] When the clamping device 2 is not provided on the transparent cap 1, a support sleeve 4 can be installed. The support sleeve 4 is composed of three layers of rubber rings connected in sequence when not in use, which are, from bottom to top, a first layer of rubber ring 41, a second layer of rubber ring 42, and a third layer of rubber ring 43. A fixing sheet 431 is provided on the third layer of rubber ring 43. A fixing hole 411 capable of cooperating with the fixing sheet 431 is provided in the first layer of rubber ring 41. A bracket 44 is provided in the third layer of rubber ring 43. The bracket 44 is composed of a plurality of independent support frames distributed in an annular manner in the third layer of rubber ring 43. The plurality of independent support frames of the bracket are in a retracted state when not in use.

[0064] When in use, first pass the first rubber ring 41 and the second rubber ring 42 through the gap between the inner ring 11 and the outer ring 12. Since the gap between the inner ring 11 and the outer ring 12 is not a complete circle, the first rubber ring 41 and the second rubber ring 42 are also provided with openings corresponding to the notch of the outer ring 12. The second rubber ring 42 is retained in the gap between the inner ring 11 and the outer ring 12, and the first rubber ring 41 passes through the gap.

[0065] Fold the first rubber ring 41 upward to the outside of the outer ring 12, and then fold the third rubber ring 43 downward. After folding into place, insert the fixing piece 431 on the third rubber ring 43 into the fixing hole 411 of the first rubber ring 41. At this time, the bracket 44 on the third rubber ring 43 is opened, which can play a better supporting role during surgery.

[0066] The inner ring 11 of the transparent cap 1 can also provide space for the practical use of surgical instruments. The surgical instruments in the inner ring 11 of the transparent cap 1, in combination with the surgical instruments in the clamping device 2 installed in the outer ring 12, can greatly improve the synchronous operability of medical staff. At the same time, the coordinated work of multiple instruments can provide personnel with a better field of vision as well as the convenience and accuracy of operation, reducing surgical risks. The clamping device can be rotated during use without the need to remove the endoscope and the transparent cap for adjustment, which can greatly facilitate medical staff to switch between multiple surgical angles during surgery, reduce the number of times the instrument goes in and out, and improve safety.

[0067] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A rotatable transparent cap for an endoscope, characterized in that: It includes a transparent cap, a clamping device, and a control device, wherein the clamping device is installed on the transparent cap, the control device is connected to the end of the transparent cap, the transparent cap includes an inner ring and an outer ring, the side wall of the outer ring is bent and fixed on the side wall of the inner ring, the clamping device is composed of a clamping head and a clamping ear, the clamping ear is fixedly connected to one side of the clamping head, and the clamping ear is inserted into the gap between the outer ring and the inner ring on the transparent cap.

2. A rotatable endoscope transparent cap according to claim 1, characterized in that: The chuck is also provided with a plurality of rollers arranged in parallel, and the rollers rotate on the side of the outer ring. The chuck is provided with a clamping hole that passes through from top to bottom, and the clamping hole is provided with an internal thread. An elastic silicone gasket is provided on the upper side of the internal thread in the clamping hole. The chuck is a single chuck or a double chuck.

3. The rotatable transparent cap of an endoscope according to claim 1, characterized in that: A wire passing hole is provided on the side wall of the bending part of the outer ring, and a wire binding hole is provided on the clamping ear.

4. The rotatable transparent cap for endoscope according to claim 3, characterized in that: A fixing piece is provided on the lower side of the inner ring side surface between the bent side walls of the outer ring, and a wire pipe hole is provided on the fixing piece.

5. The rotatable transparent cap of an endoscope according to claim 4, characterized in that: The control device comprises a wire-passing tube and a handle. The wire-passing tube is clamped in the wire-passing tube hole, and the handle is connected to the lower side of the wire-passing tube.

6. The rotatable transparent cap of an endoscope according to claim 5, characterized in that: The handle is composed of a handle housing and an intermediate shaft installed in the handle housing. The intermediate shaft rotates on the handle housing and slides axially in the handle housing.

7. The rotatable transparent cap of an endoscope according to claim 6, characterized in that: The intermediate shaft is provided with two parallel ratchet wheels, and the handle housing is provided with two internal meshing gears corresponding to the parallel ratchet wheels.

8. The rotatable transparent cap of an endoscope according to claim 7, characterized in that: The two internally meshing gears and the two ratchets are respectively located on both sides of the handle and are meshed on the same side. Only one of the two ratchets can mesh with the corresponding internally meshing gear at the same time.

9. The rotatable transparent cap of an endoscope according to claim 8, characterized in that: A traction rope is fixedly connected to both sides of the wire binding hole. The traction ropes on both sides pass through the wire through hole and the wire through tube respectively and are connected to the internal meshing gear of the handle housing.

10. The rotatable transparent cap of an endoscope according to claim 1, characterized in that: The clamping device is replaced by a support sleeve, which is composed of three layers of rubber rings connected in sequence, which are, from bottom to top, a first layer of rubber ring, a second layer of rubber ring, and a third layer of rubber ring. A fixing sheet is provided on the third layer of rubber ring, and a fixing hole that can cooperate with the fixing sheet is provided in the first layer of rubber ring. A bracket is provided in the third layer of rubber ring, and the bracket is composed of a plurality of independent support frames distributed in an annular manner in the third layer of rubber ring. When the bracket is not in use, the plurality of independent support frames of the bracket are in a retracted state. When the support sleeve is in use, the second layer of rubber ring is retained in the gap between the inner ring and the outer ring, the first layer of rubber ring is folded upward to the outside of the outer ring, and then the third layer of rubber ring is folded downward, and the fixing sheet on the third layer of rubber ring is inserted into the fixing hole of the first layer of rubber ring, and the bracket is opened.

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