Endoscope sleeve installation method and device

Abstract

The present invention provides an installation method and device for an endoscope sleeve, wherein a first step and a second step having different outer diameters are used to respectively connect the sleeve and a steel pipe, so that a gap exists between the sleeve and the steel pipe, and the sleeve is expanded outwards to be in close contact with the inner wall of the steel pipe through gas pressure control, and the inner diameter of the sleeve is enlarged so that a serpentine structure can be directly inserted into the inner space of the sleeve, and then the normal pressure state is restored through gas pressure control, so that the sleeve is naturally contracted and restored to be in close contact with the serpentine structure, thereby avoiding direct manual operation of the sleeve, reducing material damage, and improving installation efficiency; in order to avoid the air in the first space being directly extracted from the exhaust hole after the sleeve is expanded outwards, so that the sleeve fluctuates while expanding outwards, in the present invention, after the sleeve is expanded outwards to a steady state, the exhaust hole is at least partially blocked, thereby reducing or even eliminating the phenomenon of extracting air from the first space, and improving stability.

Description

Technical Field

[0001] The invention belongs to the technical field of endoscope production, and in particular relates to an installation method and device for an endoscope sleeve. Background Art

[0002] In the medical field, endoscopes are widely used in clinical practice because of their obvious advantages in inspection and treatment, such as direct viewing of images, easy operation, integrated diagnosis and treatment, and minimally invasive treatment. An endoscope includes an insertion component that extends into the human body and an endoscope handle that controls the movement of the insertion component, camera, and lighting. The insertion component includes a snake bone structure, which is pulled to bend the snake bone structure to drive the insertion component to find more accurate human tissues and perform treatment.

[0003] Generally speaking, a layer of casing needs to be wrapped around the outside of the snake-bone structure, and the casing is tightly attached to the outside of the snake-bone structure. However, this assembly process is very difficult. Currently, a layer of casing needs to be manually installed on the outside of the snake-bone structure, which has high labor costs and low efficiency. In addition, in the process of putting it from one end to the other, the casing or the snake-bone structure is easily damaged, resulting in material waste. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide an installation method and device for an endoscope cannula, which is mainly used to solve the defects of the prior art such as high labor cost, low efficiency, and easy material damage and waste when a layer of cannula is installed outside the snake bone structure.

[0005] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0006] In a first aspect, the present invention provides a method for installing an endoscope sleeve, which is used to install a sleeve outside the snake structure of an endoscope, comprising the following steps:

[0007] Sleeve the first end of the sleeve on the first step of the joint component;

[0008] The first end of the steel pipe is sleeved on the second step of the joint member; wherein the first step is stacked on the step end surface of the second step, the outer diameter of the first step is smaller than the outer diameter of the second step, the inner space of the sleeve is the first space, and the gap between the sleeve and the steel pipe is the second space;

[0009] The baffle is used to cover the second end of the casing and the steel pipe together, and a first action is performed, wherein the first action is configured to change the pressure difference between the first space and the second space so that the pressure of the first space is greater than the pressure of the second space, so that the casing expands outward to be close to the inner wall of the steel pipe;

[0010] Insert the snake structure of the endoscope from the second end of the sleeve, stop the first action, and restore the pressure difference between the first space and the second space.

[0011] In some embodiments, the second step is provided with an exhaust hole at the end surface of the step between the casing and the steel pipe, and the first action is configured to extract the gas between the casing and the steel pipe through the exhaust hole.

[0012] In some embodiments, when air is being pumped out, the sleeve, after expanding outward to a steady state, at least partially covers the air pumping hole.

[0013] In some embodiments, before vacuuming, a plurality of hard strips are inserted from the baffle side, with one end of the hard strip inserted into the vacuum hole and the other end placed in the sliding groove of the baffle;

[0014] When air is being pumped out, the hard strip moves radially as the sleeve expands outward.

[0015] In some embodiments, the radial movement distance of the hard strip in the sliding groove is greater than the radial movement distance of the hard strip in the air extraction hole.

[0016] In some embodiments, the baffle is configured to have a through hole in the middle with a hole diameter larger than the outer diameter of the serpentine structure. When the sleeve is expanded outward to fit closely against the inner wall of the steel pipe, the serpentine structure is inserted through the through hole.

[0017] In some embodiments, the baffle is configured to be spliced ​​by at least two baffle components. After the snake-bone structure is inserted from the through hole, the baffle is removed and the air extraction is stopped.

[0018] In a second aspect, the present invention provides an installation device for an endoscope sleeve, which is used to install a layer of sleeve outside the snake-bone structure of an endoscope, including a joint component, a sleeve, a steel pipe and a baffle, one end of the joint component is stacked with a first step and a second step, the outer diameter of the first step is smaller than the outer diameter of the second step, the first end of the sleeve is sleeved on the first step, the first end of the steel pipe is sleeved on the second step, there is a gap between the sleeve and the steel pipe, the second ends of the sleeve and the steel pipe are jointly abutted against the baffle, and the second step is provided with an exhaust hole at the step end face between the sleeve and the steel pipe.

[0019] In some embodiments, it also includes a plurality of hard strips, and the baffle is provided with a plurality of sliding grooves along the circumference, and one end of the hard strip is inserted into the air extraction hole, and the other end is placed in the sliding groove of the baffle.

[0020] In some embodiments, the baffle includes at least two baffle components, and after the baffle components are spliced ​​together, a through hole with a hole diameter larger than the outer diameter of the serpentine structure is constructed in the middle.

[0021] Compared with the prior art, the present invention has at least the following beneficial effects:

[0022] The first step and the second step with different outer diameters are used to connect the casing and the steel pipe respectively, so that there is a gap between the casing and the steel pipe. The casing is expanded outward to be close to the inner wall of the steel pipe through gas pressure control, and the inner diameter of the casing is enlarged so that the snake-bone structure can be directly inserted into the inner space of the casing. Then, the gas pressure is controlled to restore the normal pressure state, so that the casing shrinks and recovers naturally and is close to the snake-bone structure, avoiding direct manual operation of the casing, reducing material damage, and improving installation efficiency.

[0023] In order to avoid the sleeve from directly extracting the air in the first space from the air extraction hole after the sleeve expands outward, causing the sleeve to fluctuate while expanding outward, the sleeve in the present invention at least partially blocks the air extraction hole after expanding outward to a steady state, thereby reducing or even eliminating the phenomenon of extracting air from the first space and improving stability;

[0024] In order to adapt to the installation of the sleeve of the long snake-bone structure and avoid the sleeve near one end of the exhaust hole blocking the gap between the sleeve and the steel pipe after expansion, thereby affecting the expansion of the rear end sleeve, the present invention adopts a method of arranging a plurality of hard long strips between the steel pipe and the sleeve. The radial movement stroke of the hard long strip in the sliding groove is greater than the radial movement stroke in the exhaust hole, so that the hard long strip is inclined to expand outward after the exhaust enters the steady state, which is beneficial to prolong the exhaust time and ensure that the sleeve in the long size state can still expand outward as a whole.

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

[0027] Figure 1 It is a schematic diagram of the overall structure of an installation device for an endoscope sleeve in this embodiment.

[0028] Figure 2 It is a schematic diagram of the structure explosion of an endoscope sleeve installation device in this embodiment.

[0029] Figure 3 The figure is a half-section structural view of a mounting device for an endoscope sleeve in an embodiment.

[0030] Figure 4 The present invention is a partial structural cross-sectional view of a mounting device for an endoscope sleeve in an embodiment.

[0031] Figure 5 It is a schematic structural diagram of a joint component in an embodiment. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present invention, when it is described that a specific device is located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device. When it is described that a specific device is connected to other devices, the specific device may be directly connected to the other devices without an intermediate device, or may not be directly connected to the other devices but have an intermediate device.

[0035] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0036] The inventors found that:

[0037] The traditional way to wrap a sleeve around the snake-bone structure of an endoscope is to manually wrap one end of the sleeve from the first end of the snake-bone structure to its second end. This process may cause damage to both the sleeve and the snake-bone structure, and has high labor costs and low efficiency.

[0038] In view of this, in order to solve the above existing problems, in the first aspect, this embodiment provides an endoscope sleeve installation method for installing a sleeve 10 outside the snake bone structure of the endoscope, which requires the use of a specific Figures 1 to 5 The installation device in the embodiment specifically comprises the following steps:

[0039] The first end of the sleeve 10 is sleeved on the first step 31 of the joint member 30;

[0040] The first end of the steel pipe 20 is sleeved on the second step 32 of the joint member 30; wherein the first step 31 is stacked on the step end surface of the second step 32, the outer diameter of the first step 31 is smaller than the outer diameter of the second step 32, the inner space of the sleeve 10 is the first space 33, the gap between the sleeve 10 and the steel pipe 20 is the second space 34, the second space 34 is formed outside the first space 33, and the sleeve 10 is used to separate the two spaces;

[0041] The baffle 40 is used to cover the second end of the casing 10 and the steel pipe 20, and a first action is performed. The first action is configured to change the pressure difference between the first space 33 and the second space 34, so that the pressure of the first space 33 is greater than the pressure of the second space 34, which is equivalent to the pressure inside the pipe being greater than the pressure outside the pipe. This pressure difference causes the casing 10 to automatically expand outward without manual intervention until it is tightly attached to the inner wall of the steel pipe 20;

[0042] Insert the snake-bone structure of the endoscope from the second end of the sleeve 10, stop the first action, and restore the pressure difference between the first space 33 and the second space 34. When the pressure difference is lost, the sleeve 10 will only wrap the snake-bone structure due to the shrinkage of its own material to complete the installation of the sleeve 10.

[0043] In this embodiment, the first step 31 and the second step 32 with different outer diameters are used to connect the sleeve 10 and the steel pipe 20 respectively. Since the sleeve 10 and the steel pipe 20 have different diameters and both have a certain length, the sleeve 10 has a certain elasticity. After one end of the sleeve 10 is sleeved on the first step 31, the first end of the steel pipe 20 is sleeved on the second step 32, so that there is a gap between the sleeve 10 and the steel pipe 20. After the second ends of the sleeve 10 and the steel pipe 20 are blocked at the same time, the gas in the second space 34 is extracted or the gas is input into the first space 33 through gas pressure control, so that the inside and outside of the sleeve 10 are The gas pressure forms a pressure difference, so that the casing 10 expands outward to be close to the inner wall of the steel pipe 20, and the inner diameter of the casing 10 is enlarged. At this time, the inner diameter of the casing 10 is larger than the outer diameter of the snake-bone structure, so that the snake-bone structure can be directly inserted into the inner space of the casing 10 until the snake-bone structure reaches the step end face of the first step 31. During this process, the snake-bone structure and the casing 10 can be in no direct contact, and no damage is caused to the snake-bone structure and the casing 10. Then, the gas pressure control is used to restore the normal pressure state, so that the casing 10 naturally shrinks and recovers, close to the snake-bone structure, avoiding direct manual operation of the casing 10, reducing material damage, and improving installation efficiency.

[0044] Regarding the specific implementation of the first action, two embodiments are given here:

[0045] As an embodiment, a silicone tube is connected to the other end of the joint component, and an air outlet is provided on the step end face and / or the step side face of the first step. The first action is configured to supply gas to the sleeve through the air outlet, and the silicone tube is used to supply gas to the first step. The gas is blown into the air outlet, so that the pressure of the first space in the sleeve becomes larger and expands outward. It should be noted that the baffle is provided with an exhaust hole in the area corresponding to the second space, which is used to discharge the air in the second space when the sleeve expands outward. This method is equivalent to the method of blowing a balloon, and the sleeve is expanded by increasing the gas pressure in the sleeve.

[0046] refer to Figure 4 As another embodiment, the second step 32 is provided with an exhaust hole 35 at the step end surface between the casing 10 and the steel pipe 20. The first action is configured to extract the gas between the casing 10 and the steel pipe 20 through the exhaust hole 35. Similarly, a silicone tube 50 is connected to the other end of the joint member 30, and the silicone tube 50 is used to exhaust gas outward, so that the gas in the second space 34 between the casing 10 and the steel pipe 20 is extracted from the exhaust hole 35, so that the pressure of the second space 34 outside the casing 10 becomes smaller, and the casing 10 Expand outward; it should be noted that in order to avoid the air in the first space 33 being directly extracted from the exhaust hole 35 after the sleeve 10 expands outward, causing the sleeve 10 to fluctuate while expanding outward, the sleeve 10 in the present invention at least partially blocks the exhaust hole 35 after expanding outward to a steady state. Preferably, part of the sleeve 10 after expansion can be used to isolate between the exhaust hole 35 and the first space 33, and the exhaust hole 35 is not directly connected to the first space 33, thereby preventing the phenomenon of extracting air from the first space 33 and improving stability.

[0047] refer to Figure 4 In this embodiment, before the air is pumped out, a plurality of hard strips 70 are inserted from the side of the baffle 40, one end of the hard strip 70 is inserted into the air pumping hole 35, and the other end is placed in the sliding groove 80 of the baffle 40;

[0048] When air is being pumped out, the hard strip 70 moves in the radial direction as the sleeve 10 expands outward.

[0049] The deformation degree of the hard strip 70 during the process of exhaustion or recovery is smaller than that of the sleeve 10. Before exhaustion, the joint member 30 can be placed vertically, with the first step 31 and the second step 32 both facing vertically upward. After the sleeve 10 and the steel pipe 20 are put on, the baffle 40 is placed, wherein the second ends of the sleeve 10 and the steel pipe 20 will abut against the baffle 40, and the first space 33 and the second space 34 are not the same. At this time, the hard strip 70 is placed again, and the hard strip 70 is at two different upper and lower limit positions. The diameters of the lower circle and the upper circle constructed in the structure are different. In the initial state, the lower circle is larger than the upper circle, and the hard strip 70 is equivalent to gradually shrinking from the bottom to the top. When the air is pumped out, as the sleeve 10 expands outward, the sleeve 10 also diffuses the hard strip 70 outward. In the stable state, the lower circle is smaller than the upper circle, and the hard strip 70 is equivalent to gradually expanding from the bottom to the top, that is, the radial movement distance of the hard strip 70 in the sliding groove 80 is greater than the radial movement distance in the air pumping hole 35.

[0050] Preferably, the air extraction hole 35 is in the shape of a circular hole, and the sliding groove 80 is in the shape of an elongated hole.

[0051] It should be noted that when it is necessary to install a sleeve 10 of a longer snake-bone structure, in order to avoid the sleeve 10 near one end of the air extraction hole 35 from blocking the gap between the sleeve 10 and the steel pipe 20 after expansion, thereby affecting the extraction of air in the second space 34 at the rear end and affecting the expansion degree of the sleeve 10 at the rear end, the present embodiment adopts a method of setting a plurality of hard strips 70 between the steel pipe 20 and the sleeve 10. When the sleeve 10 near one end of the air extraction hole 35 expands, it will be limited by the hard strips 70 and always form a distance with the inner wall surface of the steel pipe 20. Moreover, this distance area is controlled on the side corresponding to the first step 31, because the part of the sleeve 10 in this distance area is easy to cause The material is strained, and the snake-bone structure only abuts against the step end face of the first step 31, and the excess part of the sleeve 10 below the step end face can be cut off. Furthermore, the radial movement stroke of the hard strip 70 in the sliding groove 80 is greater than the radial movement stroke in the exhaust hole 35, so that the hard strip 70 is inclined and expanded outward after the exhaust enters the steady state, and the circle diameter of the upper circle constructed by the hard strip 70 is equal to the inner diameter of the steel pipe 20, ensuring that the sleeve 10 and the steel pipe 20 form a close fit at the end of the second space 34, and only construct a spacing area at the front end of the second space 34, which is conducive to extending the exhaust time and ensuring that the sleeve 10 in the long size state can still expand outward as a whole.

[0052] Preferably, the hard strip 70 will undergo a certain bending deformation under the external expansion force of the sleeve 10. By controlling the hardness of the hard strip 70 and the setting of the radial movement stroke in the sliding groove 80 and the exhaust hole 35, the deformation zone of the hard strip 70 only occurs in the spacing area on the side corresponding to the first step 31, which is equivalent to the hard strip 70 being bent and presenting an arc shape.

[0053] As an embodiment, the baffle 40 is configured to have a through hole in the middle with a diameter larger than the outer diameter of the serpentine structure, but this through hole is smaller than the diameter of the sleeve 10. When the sleeve 10 expands outward to fit closely against the inner wall of the steel pipe 20, the serpentine structure is inserted from the through hole. This method ensures that when the serpentine structure is inserted, the gap between the sleeve 10 and the steel pipe 20 is still in a negative pressure state, and the sleeve 10 will not retract when inserted into the serpentine structure, thereby ensuring production quality.

[0054] Preferably, the baffle 40 is configured to be spliced ​​with at least two baffle components. After the serpentine structure is inserted into the through hole, the baffle 40 is removed and the air extraction is stopped. The different baffle components can be directly pulled out radially without considering the structural parts with larger outer diameter that may exist at the rear end of the serpentine structure.

[0055] Second, refer to Figures 1 to 5 The present embodiment provides an installation device for an endoscope sleeve, which is used to install a sleeve 10 outside the snake structure of an endoscope, including a joint component 30, the sleeve 10, a steel pipe 20 and a baffle 40. One end of the joint component 30 is stacked with a first step 31 and a second step 32. The outer diameter of the first step 31 is smaller than the outer diameter of the second step 32. The first step 31 is closer to the outside than the second step 32. The other end of the joint component 30 is used to connect the silicone tube 50 for gas pressure control. The first end of the sleeve 10 is sleeved on the first step 31. The first end of the steel pipe 20 is sleeved on the second step 32. The steel pipe 20 and the second step 32 are sealed and connected by a sealing ring 60. There is a gap between the outer wall of the sleeve 10 and the inner wall of the steel pipe 20. The second ends of the sleeve 10 and the steel pipe 20 are jointly abutted against the baffle 40. The second step 32 is provided with an exhaust hole 35 at the step end face between the sleeve 10 and the steel pipe 20. The air between the sleeve 10 and the steel pipe 20 can be extracted through the silicone tube 50 and the exhaust hole 35, so that the sleeve 10 expands outward under the action of the internal and external pressure difference.

[0056] Further, refer to Figure 4, and also includes a plurality of hard strips 70. The baffle 40 is provided with a plurality of sliding grooves 80 along the circumferential direction. One end of the hard strip 70 is inserted into the exhaust hole 35, and the other end is placed in the sliding groove 80 of the baffle 40. The hard strip 70 mainly prevents the outward expansion of the front end of the sleeve 10 from affecting the air extraction at the rear end of the sleeve 10. The hard strip 70 can be used to construct a spacing area at the front end of the second space 34. There is a certain spacing between the sleeve 10 and the steel pipe 20 in the spacing area, which is conducive to extending the exhaust time and ensuring that the sleeve 10 in the long size state can still expand as a whole.

[0057] The baffle 40 includes at least two baffle components, which are spliced ​​to form a through hole in the middle of the baffle components, the hole diameter of which is larger than the outer diameter of the serpentine structure. After the serpentine structure is inserted into the through hole, the baffle 40 is removed and the air extraction is stopped. The different baffle components can be directly withdrawn from the radial direction without considering the structural parts with a larger outer diameter that may exist at the rear end of the serpentine structure.

[0058] refer to Figure 5 In one embodiment, the exhaust hole 35 includes an opening portion and a groove portion. The opening portion is opened at the side wall surface of the first step 31 and is connected to the groove portion radially outward. The opening portion spans the first step 31 and the second step 32 at the same time. The sleeve 10 sleeved on the first step 31 can only cover half of the opening portion. The exhaust hole 35 can also be exhausted through the other half of the opening portion and use the extended groove portion.

[0059] In summary, compared with the prior art, the above embodiment provides an installation method and device for an endoscope sleeve, wherein the sleeve 10 and the steel pipe 20 are respectively connected by using the first step 31 and the second step 32 of different outer diameters, so that there is a gap between the sleeve 10 and the steel pipe 20, and the sleeve 10 is expanded outward to be close to the inner wall of the steel pipe 20 through gas pressure control, and the inner diameter of the sleeve 10 is enlarged so that the snake-bone structure can be directly inserted into the inner space of the sleeve 10, and then the normal pressure state is restored through gas pressure control, so that the sleeve 10 is naturally contracted and restored, close to the snake-bone structure, avoiding direct manual operation of the sleeve 10, reducing material damage, and improving installation efficiency;

[0060] In order to prevent the sleeve 10 from directly extracting the air in the first space 33 from the air extraction holes 35 after the sleeve 10 expands outwards, causing the sleeve 10 to fluctuate while expanding outwards, in the present invention, after the sleeve 10 expands outwards to a steady state, the air extraction holes 35 are at least partially blocked, thereby reducing or even eliminating the phenomenon of extracting air from the first space 33 and improving stability.

[0061] In order to adapt to the installation of the sleeve 10 with a long snake-bone structure and avoid the sleeve 10 near one end of the exhaust hole 35 blocking the gap between the sleeve 10 and the steel pipe 20 after expansion, thereby affecting the expansion of the rear end sleeve 10, the present invention adopts a method of arranging a plurality of hard strips 70 between the steel pipe 20 and the sleeve 10. The radial movement stroke of the hard strip 70 in the sliding groove 80 is greater than the radial movement stroke in the exhaust hole 35, so that the hard strip 70 is inclined to expand outward after the exhaust enters a steady state, which is beneficial to prolonging the exhaust time and ensuring that the sleeve 10 in a long-size state can still expand outward as a whole.

[0062] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A method for installing an endoscope sleeve, for installing a sleeve outside the snake structure of an endoscope, characterized in that: The following steps are involved: Sleeve the first end of the sleeve on the first step of the joint component; The first end of the steel pipe is sleeved on the second step of the joint member; wherein the first step is stacked on the step end surface of the second step, the outer diameter of the first step is smaller than the outer diameter of the second step, the inner space of the sleeve is the first space, and the gap between the sleeve and the steel pipe is the second space; The baffle is used to cover the second end of the casing and the steel pipe together, and a first action is performed, wherein the first action is configured to change the pressure difference between the first space and the second space so that the pressure of the first space is greater than the pressure of the second space, so that the casing expands outward to be close to the inner wall of the steel pipe; Insert the snake structure of the endoscope from the second end of the sleeve, stop the first action, and restore the pressure difference between the first space and the second space.

2. A method for installing an endoscope sleeve as claimed in claim 1, characterized in that: The second step is provided with an exhaust hole at the end surface of the step between the casing and the steel pipe, and the first action is configured to extract the gas between the casing and the steel pipe through the exhaust hole.

3. A method for installing an endoscope sleeve as claimed in claim 2, characterized in that: When air is being pumped out, the sleeve, after expanding outward to a steady state, at least partially covers the air pumping hole.

4. A method for installing an endoscope sleeve as claimed in claim 3, characterized in that: Before vacuuming, a plurality of hard strips are inserted from the baffle side, with one end of the hard strip inserted into the vacuum hole and the other end placed in the sliding groove of the baffle; When air is being pumped out, the hard strip moves radially as the sleeve expands outward.

5. A method for installing an endoscope sleeve as claimed in claim 4, characterized in that: The radial movement distance of the hard strip in the sliding groove is greater than the radial movement distance of the hard strip in the air extraction hole.

6. A method for installing an endoscope sleeve as claimed in claim 5, characterized in that: The baffle is configured to have a through hole in the middle with a hole diameter larger than the outer diameter of the serpentine structure. When the sleeve is expanded outward to be in close contact with the inner wall of the steel pipe, the serpentine structure is inserted from the through hole.

7. A method for installing an endoscope sleeve as claimed in claim 6, characterized in that: The baffle is configured to be spliced ​​by at least two baffle components. After the snake-bone structure is inserted from the through hole, the baffle is removed and the air extraction is stopped.

8. An installation device for an endoscope sleeve, used for installing a sleeve outside the snake structure of an endoscope, characterized in that: It includes a joint component, a sleeve, a steel pipe and a baffle. One end of the joint component is stacked with a first step and a second step. The outer diameter of the first step is smaller than the outer diameter of the second step. The first end of the sleeve is sleeved on the first step. The first end of the steel pipe is sleeved on the second step. There is a gap between the sleeve and the steel pipe. The second ends of the sleeve and the steel pipe are jointly abutted against the baffle. The second step is provided with an exhaust hole at the step end face between the sleeve and the steel pipe.

9. The installation device for an endoscope sleeve as claimed in claim 8, characterized in that: It also includes a plurality of hard strips, and the baffle is provided with a plurality of sliding grooves along the circumference. One end of the hard strip is inserted into the air extraction hole, and the other end is placed in the sliding groove of the baffle.

10. The installation device for an endoscope sleeve as claimed in claim 9, characterized in that: The baffle plate includes at least two baffle components, and after the baffle components are spliced ​​together, a through hole with a hole diameter larger than the outer diameter of the snake-bone structure is constructed in the middle.

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