Disposable tube sheath and endoscope assembly

Abstract

The utility model provides a disposable tube sheath and an endoscope assembly. The disposable tube sheath comprises a tube body and a flexible light-transmitting piece, the tube body is provided with an insertion channel used for allowing an endoscope tube of an endoscope to be inserted, and the flexible light-transmitting piece seals a far-end opening of the tube body. The flexible light-transmitting piece can deform when the endoscope tube is inserted into the insertion channel and abuts against the flexible light-transmitting piece, so that the flexible light-transmitting piece is attached to the endoscope, the attaching degree of the flexible light-transmitting piece and the endoscope is improved, a gap between the far end of the endoscope and the inner side face of the tube sheath is reduced or even eliminated, and the imaging quality is improved. Moreover, the flexible light-transmitting piece is not directly processed and fixed with the tube body, but is fixedly connected to the tube body through the fixing piece, so that the processing difficulty is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a sheath structure. Background Art

[0002] In clinical medicine, the use of endoscopes for examination or treatment is currently the most commonly used minimally invasive diagnosis and treatment method, which causes less damage to patients. Endoscopes are widely used in the exploration and treatment of natural cavities in the human body. Currently, traditional endoscopes are usually reused after disinfection. Disposable endoscopes can solve the problems of cross-infection and repeated disinfection and sterilization of reused endoscopes. However, disposable electronic endoscopes are relatively expensive, which is also one of the important factors restricting the rapid development and widespread use of disposable electronic endoscopes.

[0003] In order to solve the problem of repeated disinfection and sterilization, reduce costs, and further reduce the outer diameter of the endoscope, there is currently a design that uses a disposable sheath to replace a disposable endoscope, and the part of the disposable sheath inserted into the human body is a closed design. The electronic endoscope includes an endoscope handle, a mirror tube, a lens, and an image sensor, wherein the lens is at the distal end of the mirror tube, and the endoscope handle is at the proximal end of the mirror tube. The distal end of the electronic endoscope has a lens for light to pass through, an image sensor, and an illumination light source integrated in the surrounding. A transparent glass cover is sealed at the distal end of the disposable sheath, and the mirror tube of the endoscope can be inserted into the disposable sheath. After the mirror tube of the endoscope is inserted into the disposable sheath, it will not come into contact with the human body. After the operation is completed, the disposable sheath can be discarded, and the endoscope can be used repeatedly, which can reduce the requirements for disinfection and sterilization of the endoscope and also reduce costs.

[0004] However, currently, disposable sheaths mostly use hard lenses in combination with endoscopes. However, due to manufacturing and assembly tolerances, the hard lenses and endoscopes may not fit completely together, resulting in a series of optical problems such as image loss and reflection during imaging. Utility Model Content

[0005] The utility model aims to provide a disposable tube sheath for realizing the assembly of a flexible light-transmitting component and a tube body.

[0006] In addition, the purpose of the present invention is to provide an endoscope assembly using the disposable sheath.

[0007] Based on the above-mentioned purpose, some embodiments of the present application provide a disposable sheath, including a tube body and a flexible light-transmitting member, the tube body having an insertion channel for inserting a mirror tube of an endoscope, the insertion channel having a distal opening, the flexible light-transmitting member being fixedly connected to the tube body by a fixing member and closing the distal opening of the tube body, the flexible light-transmitting member being able to deform when the mirror tube is inserted into the insertion channel and presses against the flexible light-transmitting member, so that the flexible light-transmitting member fits the endoscope.

[0008] In some more specific embodiments, the flexible light-transmitting member has a cylindrical side wall and a bottom wall located at one end of the cylindrical side wall, and the flexible light-transmitting member is sleeved on the distal end of the tube body; the side wall is in contact with the outer circumferential surface of the tube body and is fixed by the fixing member, and the bottom wall closes the distal opening.

[0009] More specifically, in some embodiments, the fixing member is disposed along the circumference of the side wall and squeezes the side wall so that the side wall is sealed and fitted with the outer circumferential surface of the tube body.

[0010] In some more specific embodiments, the fixing member has a first end and a second end that are relatively arranged, and a transition channel that passes through the first end and the second end. The first end is fixed to the tube body so that the transition channel is sealed and connected to the insertion channel. The flexible light-transmitting member is fixed to the second end and closes the transition channel.

[0011] In some more specific embodiments, the flexible light-transmitting member has a cylindrical side wall and a bottom wall located at one end of the cylindrical side wall, the flexible light-transmitting member is sleeved on the second end of the fixing member, the side wall is adhered to and sealed against the outer circumferential surface of the second end, and the bottom wall closes the opening of the transfer channel located at the second end.

[0012] More specifically, in some embodiments, the first end of the fixing member is inserted into the tube body and sealed and fixed to the inner wall of the tube body; the outer circumference of the flexible light-transmitting member is flush with the outer circumference of the distal end of the tube body.

[0013] In some more specific embodiments, the outer peripheral surface of the fixing member is provided with a circle of ridges, and the ridges divide the fixing member into the first end and the second end; one side of the ridges abuts against the end surface of the distal end of the tube body, and the other side of the ridges abuts against the end surface of the flexible light-transmitting member; the outer peripheral surface of the flexible light-transmitting member, the outer peripheral surface of the distal end of the tube body, and the outer peripheral surface of the ridges are flush.

[0014] In some more specific embodiments, the fixing member includes a first fixing member and a second fixing member, the first fixing member is fixedly connected to the tube body, the second fixing member is fixedly connected to the first fixing member, and the flexible light-transmitting member is clamped and fixed directly or indirectly by the first fixing member and the second fixing member.

[0015] In some more specific embodiments, the first fixing member has a first end and a second end that are relatively arranged, and a transition channel that passes through the first end and the second end. The first end of the first fixing member is fixed to the tube body so that the transition channel is sealed and connected to the insertion channel. The second fixing member is fixedly connected to the second end of the first fixing member and clamps the flexible light-transmitting member together with the second end of the first fixing member.

[0016] In some more specific embodiments, the second fixing member is sleeved on the second end of the first fixing member, the flexible light-transmitting member is located between the second end of the first fixing member and the second fixing member, and the second fixing member has a window for light to pass through.

[0017] More specifically, in some embodiments, the fixing member is sleeved and fixed on the outer peripheral surface of the distal end of the tube body, and the flexible light-transmitting member is clamped and fixed directly or indirectly by the fixing member and the tube body.

[0018] In some more specific embodiments, the fixing member has a cylindrical side wall and a bottom wall located at one end of the side wall, the side wall is sleeved and fixed on the outer circumferential surface of the distal end of the tube body, the bottom wall and the end face of the distal end of the tube body clamp the flexible light-transmitting member, and the fixing member has a window for light to pass through.

[0019] Based on the above purpose, some embodiments of the present application provide an endoscope assembly, including an endoscope and a sheath as described in any one of the above items, wherein the endoscope can be inserted into an insertion channel of the sheath.

[0020] According to the disposable sheath of the above embodiment, it includes a tube body and a flexible light-transmitting member, the tube body has an insertion channel for inserting the endoscope tube, and the flexible light-transmitting member closes the distal end opening of the tube body. The flexible light-transmitting member can be deformed when the endoscope tube is inserted into the insertion channel and presses the flexible light-transmitting member, so that the flexible light-transmitting member fits the endoscope, improves the fit between the two, reduces or even eliminates the gap between the distal end of the endoscope and the inner side of the sheath, and improves the imaging quality. Moreover, the flexible light-transmitting member is not directly fixed to the tube body, but is fixedly connected to the tube body through a fixing member, which reduces the difficulty of processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a cross-sectional view of an endoscope and a sheath after assembly in one embodiment of the present application, wherein the circle in the figure is a partial enlarged view;

[0022] Figure 2 This is a cross-sectional view of a tube sheath in one embodiment of the present application, wherein the circle in the figure is a partial enlarged view;

[0023] Figure 3 This is a cross-sectional view of a flexible light-transmitting member and a tube body being clamped and fixed by a fixing member in an embodiment of the present application;

[0024] Figure 4 This is a cross-sectional view of a flexible light-transmitting member and a tube body being fixed by a fixing member in an embodiment of the present application;

[0025] Figure 5 This is a cross-sectional view of an embodiment of the present application in which the flexible light-transmitting member and the tube body are fixed by the first fixing member and the second fixing member;

[0026] Figure 6 This is a cross-sectional view of a flexible light-transmitting member in an embodiment of the present application when it is clamped and fixed by a fixing member and a tube body;

[0027] Figure 7 This is a cross-sectional view of an embodiment of the present application when the flexible light-transmitting member is directly fixed to the tube body;

[0028] Figure 8 This is a cross-sectional view of a flexible light-transmitting member in an embodiment of the present application, which is sleeved and directly fixed on a tube body. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are intended to enable the present application to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0030] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a required sequence, unless otherwise specified that a certain sequence must be followed.

[0031] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0032] The present application provides an endoscope assembly. Please refer to Figure 1 and 2 In some embodiments, the endoscope assembly includes an endoscope 1 and a disposable sheath 2. The endoscope 1 is used to be inserted into a detection object (the detection object can be a human body, an animal or other object) to obtain an image of a desired area.

[0033] Please refer to Figure 1 In some embodiments, the endoscope 1 includes an endoscope handle 11 and a mirror tube 12. An image acquisition unit 13 is installed inside the distal end of the mirror tube 12. Image information acquired by the image sensor is transmitted to the proximal end through a wire harness inside the mirror tube 12. In some embodiments, the image acquisition unit 13 may be a camera. In other embodiments, the image acquisition unit 13 may also be other structures capable of acquiring optical signals to form images, such as optical fibers.

[0034] The proximal end and the distal end of the endoscope 1 in the present application are based on the distance from the operator when in use. For example, the distal end of the endoscope 1 in the present application is the end away from the endoscope handle 11, that is, the end inserted into the test object, and the proximal end is the end where the endoscope handle 11 is located. The distal end of the scope tube 12 is the end away from the endoscope handle 11, and the proximal end is the end close to the endoscope handle 11.

[0035] Please refer to Figure 3-Figure 6 In some embodiments, the disposable sheath 2 includes a tube body 211 and a flexible light-transmitting member 22. The tube body 211 has an insertion channel 211 for inserting the mirror tube 12 of the endoscope 1. The insertion channel 211 has a distal opening, and the flexible light-transmitting member 22 is fixedly connected to the tube body 211 through a fixing member 23 and closes the distal opening of the tube body 211, that is, the position of the flexible light-transmitting member 22 matches the distal end of the mirror tube 12.

[0036] The flexible light-transmitting member 22 is made of a material that is flexible and can transmit visible light. In some embodiments, the flexible light-transmitting member can be made of TPU, PVC, PE, EVA, PU, ​​PO, NFEP, etc. For example, the flexible light-transmitting member 22 can be a flexible transparent film.

[0037] like Figure 1As shown in the partial enlarged view in the middle circle, the mirror tube 12 is inserted into the sheath 21, and then the distal end of the mirror tube 12 continues to squeeze the flexible light-transmitting member 22 until the flexible light-transmitting member 22 is deformed to a certain extent, so that the distal end of the mirror tube 12 and the flexible light-transmitting member 22 are adaptively and completely fitted, reducing or even eliminating the gap between the distal end of the endoscope 1 and the inner side of the sheath 21, and improving the imaging quality. The flexible light-transmitting member 22 has a certain flexibility, so that the tolerance requirements between the distal end of the mirror tube 12 and the sheath 21 in the length direction of the mirror tube 12 are reduced, and can be adapted to a mirror tube 12 with a relatively wide range of tolerances, so that the manufacturing process requirements are low and it is easy to manufacture and assemble.

[0038] Generally, due to the flexibility of the flexible light-transmitting member 22 and the long length of the tube 211, it is difficult to directly fix the tube 211 to the flexible light-transmitting member 22. Figure 3-Figure 6 The flexible light-transmitting member 22 is not directly fixed to the tube body 211, but is fixedly connected to the tube body 211 through a fixing member 23, which reduces the processing difficulty and enables the flexible light-transmitting member 22 to be applied to the tube body 211 at a lower cost.

[0039] In some embodiments, the fixing member 23 may be made of plastic or other materials that can be applied to the tube sheath 21. For example, the material of the tube sheath 21 is harder than the material of the flexible light-transmitting member 22, so it is easier to fix it to the tube body 211.

[0040] Please refer to Figure 3 In some embodiments, the flexible light-transmitting member 22 has a cylindrical side wall 221 and a bottom wall 222 located at one end of the cylindrical side wall 221. For example, the flexible light-transmitting member 22 can be integrally formed or formed into a bowl-shaped structure by later fixed connection. The flexible light-transmitting member 22 can be pre-formed by a mold to form a preform. The flexible light-transmitting member 22 is sleeved on the distal end of the tube body 211. The distal end of the tube body 211 is the end of the tube body 211 corresponding to the distal end of the endoscope 1. The side wall 221 of the flexible light-transmitting member 22 is in contact with the outer peripheral surface of the tube body 211 and is fixed by a fixing member 23, and the bottom wall 222 of the flexible light-transmitting member 22 closes the distal opening. In this embodiment, the side wall 221 of the flexible light-transmitting member 22 is in contact with the outer peripheral surface of the tube body 211, thereby increasing the contact area between the flexible light-transmitting member 22 and the tube body 211 and providing a larger force application area for the fixing member 23, thereby reducing the manufacturing difficulty when the flexible light-transmitting member 22 and the tube body 211 are fixed by the fixing member 23.

[0041] The fixing member 23 can achieve sealing and fixing of the tube body 211 and the flexible light-transmitting member 22 by squeezing the flexible light-transmitting member 22 toward the tube body 211. Figure 3In some embodiments, the fixing member 23 is disposed along the circumference of the side wall 221 and squeezes the side wall 221 so that the side wall 221 is sealed and fitted with the outer circumferential surface of the tube body 211 .

[0042] More specifically, in Figure 3 In the illustrated embodiment, the fixing member 23 may be a linear body (such as a string, etc.), which compresses and fixes the flexible light-transmitting member 22 and the tube body 211 by bundling. The fixing member 23 may also be an annular structure, thereby clamping the flexible light-transmitting member 22 and the tube body 211. For example, the annular structure may be an annular coil or a clamp, etc. In addition, the fixing member 23 may also seal and fix the flexible light-transmitting member 22 and the tube body 211 in other ways. For example, the fixing member 23 may be wrapped around the outer circumference of the flexible light-transmitting member 22 in a cylindrical structure, and clamp the side wall 221 of the flexible light-transmitting member 22 with the tube body 211, or the fixing member 23 may radially pass through the side wall 221 of the flexible light-transmitting member 22 and the tube body 211 and fix the two (such as rivets or other methods).

[0043] Please refer to Figure 4 In some embodiments, the fixing member 23 has a first end 232 and a second end 233 that are arranged opposite to each other, and a transfer channel 231 that is arranged through the first end 232 and the second end 233. The first end 232 of the fixing member 23 is fixed to the tube body 211, so that the transfer channel 231 is sealed and connected to the insertion channel 211, and the mirror tube 12 of the endoscope 1 can be inserted into the channel formed by the insertion channel 211 and the transfer channel 231. The flexible light-transmitting member 22 is fixed to the second end 233 of the fixing member 23, and closes the transfer channel 231 so that it can fit with the mirror tube 12. The fixed connection method between the fixing member 23 and the tube body 211 includes, but is not limited to, any one of welding, heat fusion, chemical connection, riveting, clamping, internal and external thread connection, interference fit and bonding, or a combination of at least two of them. The fixed connection method between the flexible light-transmitting member 22 and the fixing member 23 includes, but is not limited to, any one of welding, heat fusion, chemical connection, riveting, clamping and bonding, or a combination of at least two of them. In this embodiment, the flexible light-transmitting member 22 can be pre-formed and then fixed with the fixing member 23 to form an assembly, or the flexible light-transmitting member 22 and the fixing member 23 can be formed into an assembly by secondary injection molding, and then the assembly formed by the fixing member 23 and the flexible light-transmitting member 22 is fixed to the tube body 211. Compared with directly fixing the flexible light-transmitting member 22 to the tube body 211, in this embodiment, the flexible light-transmitting member 22 is first fixed with the fixing member 23, and then the fixing member 23 is fixed to the tube body 211. This method is less difficult to manufacture. Of course, in other embodiments, the fixing member 23 can also be first fixed to the tube body 211, and then the flexible light-transmitting member 22 is fixed to the fixing member 23.

[0044] Please continue to refer to Figure 4In some embodiments, the flexible light-transmitting member 22 has a cylindrical side wall 221 and a bottom wall 222 located at one end of the cylindrical side wall 221, for example, integrally formed or fixedly connected to form a bowl-shaped structure. The flexible light-transmitting member 22 is sleeved on the second end 233 of the fixing member 23, the side wall 221 of the flexible light-transmitting member 22 is attached to and sealed against the outer circumference of the second end 233, and the bottom wall 222 of the flexible light-transmitting member 22 closes the opening of the transfer channel 231 located at the second end 233. The side wall 221 of the flexible light-transmitting member 22 is attached to the outer circumference of the second end 233, which increases the contact area between the two, thereby improving the fixed connection effect between the two, especially when welding, thermal fusion, chemical connection or bonding is adopted, a larger contact area is conducive to obtaining a better fixed connection effect.

[0045] Please continue to refer to Figure 4 In some embodiments, the first end 232 of the fixing member 23 is inserted into the tube body 211 and sealed and fixed to the inner wall of the tube body 211. This method is conducive to making the outer peripheral surface of the portion of the tube sheath 21 inserted into the detection object smoothly transition along the axial direction of the tube sheath 21. For example, Figure 4 In the embodiment, the outer circumference of the flexible light-transmitting member 22 is flush with the outer circumference of the distal end of the tube body 211 to avoid discomfort to the detected object (especially a person or an animal). Of course, in other embodiments, the outer circumference of the flexible light-transmitting member 22 may not be flush with the outer circumference of the distal end of the tube body 211.

[0046] Of course, in other embodiments, the first end 232 of the fixing member 23 may also be wrapped around the outer circumference of the tube body 211. In this embodiment, if it is necessary to make the outer circumference of the first end 232 of the fixing member 23 and the outer circumference of the flexible light-transmitting member 22 flush with the outer circumference of the distal end of the tube body 211, a groove may be formed on the outer circumference of the tube body 211 to accommodate the first end 232 of the fixing member 23, so that the outer circumference of the first end 232 of the fixing member 23 and the outer circumference of the flexible light-transmitting member 22 are flush with the outer circumference of the distal end of the tube body 211.

[0047] Please continue to refer to Figure 4 In some embodiments, the fixing member 23 may be a cylindrical structure as a whole, and the two ends of the cylindrical structure are respectively a first end 232 and a second end 233.

[0048] For further information, please refer to Figure 4In some embodiments, the outer circumference of the fixing member 23 is provided with a circle of ridges 234, and the ridges 234 divide the fixing member 23 into a first end 232 and a second end 233. One side of the ridge 234 abuts against the end face of the distal end of the tube body 211, and the other side of the ridge 234 abuts against the end face of the flexible light-transmitting member 22. The outer circumference of the flexible light-transmitting member 22, the outer circumference of the distal end of the tube body 211, and the outer circumference of the ridge 234 are flush, so that the outer circumference of the portion of the sheath 21 inserted into the detection object is smoothly transitioned along the axial direction of the sheath 21. At the same time, the ridge 234 can also limit the tube body 211 and the flexible light-transmitting member 22, and limit the fixed positions of the two on the fixing member 23 to ensure a fixed connection effect.

[0049] Please refer to Figure 5 In some embodiments, the fixing member 23 includes a first fixing member 235 and a second fixing member 236, the first fixing member 235 is fixedly connected to the tube body 211, the second fixing member 236 is fixedly connected to the first fixing member 235, and the flexible light-transmitting member 22 is clamped and fixed directly or indirectly by the first fixing member 235 and the second fixing member 236. The flexible light-transmitting member 22 is directly clamped and fixed by the first fixing member 235 and the second fixing member 236, which means that the first fixing member 235 and the second fixing member 236 directly contact the flexible light-transmitting member 22 and clamp it. This method can simplify the structure without designing too many clamping structures. The flexible light-transmitting member 22 is indirectly clamped and fixed by the first fixing member 235 and the second fixing member 236, which means that at least one of the first fixing member 235 and the second fixing member 236 does not directly contact the flexible light-transmitting member 22, but contacts and clamps the flexible light-transmitting member 22 through other transition components.

[0050] The fixed connection between the first fixing member 235 and the tube body 211 and the fixed connection between the first fixing member 235 and the second fixing member 236 include, but are not limited to, any one of welding, heat fusion, chemical connection, riveting, clamping, internal and external thread connection, interference fit and bonding, or a combination of at least two of them. In this embodiment, in order to simplify the processing technology and reduce the manufacturing difficulty, in addition to the first fixing member 235 and the second fixing member 236 clamping the flexible light-transmitting member 22, the flexible light-transmitting member 22 may not be additionally fixed to the first fixing member 235 and the second fixing member 236 by other means. Of course, in other embodiments, in order to enhance the fixing effect, the flexible light-transmitting member 22 may also be fixed to the first fixing member 235 and / or the second fixing member 236 by any one of welding, heat fusion, chemical connection, riveting, clamping, interference fit and bonding, or a combination of at least two of them.

[0051] Please continue to refer to Figure 5In some embodiments, the first fixing member 235 has a first end 237 and a second end 238 that are arranged opposite to each other, and a transfer channel 231 that is arranged through the first end 237 and the second end 238. The first end 237 of the first fixing member 235 is fixed to the tube body 211, so that the transfer channel 231 is sealed and communicated with the insertion channel 211. The second fixing member 236 is fixedly connected to the second end 238 of the first fixing member 235, and clamps the flexible light-transmitting member 22 with the second end 238 of the first fixing member 235.

[0052] Please continue to refer to Figure 5 In some embodiments, the first end 237 of the first fixing member 235 can be inserted into the tube body 211, and the second fixing member 236 is sleeved on the outer circumference of the second end 238 of the first fixing member 235. This structure is conducive to making the outer circumference of the second fixing member 236 flush with the outer circumference of the tube body 211.

[0053] Of course, in other embodiments, the first end 237 of the first fixing member 235 may also be wrapped around the outer circumference of the tube body 211. In this embodiment, if it is necessary to make the outer circumference of the first end 237 of the first fixing member 235 and the outer circumference of the second fixing member 236 flush with the outer circumference of the tube body 211, a groove may be formed on the outer circumference of the tube body 211 to accommodate the first end 237 of the first fixing member 235, so that the outer circumference of the first end 237 of the first fixing member 235 and the outer circumference of the second fixing member 236 are flush with the outer circumference of the tube body 211.

[0054] Furthermore, in some embodiments, the second fixing member 236 may also be inserted into the second end 238 of the first fixing member 235 .

[0055] Please continue to refer to Figure 5 In some embodiments, the flexible light-transmitting member 22 is located between the second end 238 of the first fixing member 235 and the second fixing member 236. Specifically, in some embodiments, the flexible light-transmitting member 22 is clamped and fixed by the end surface of the second end 238 of the first fixing member 235 and the bottom wall 2361 of the second fixing member 236.

[0056] Please continue to refer to Figure 5 In some embodiments, the second fixing member 236 has a window 2362 for light to pass through, so as to prevent the second fixing member 236 from blocking light from entering the endoscope 1. The window 2362 can be an opening or made of a light-transmitting material. Figure 5 The window 2362 area shown is configured to be made of a light-transmitting material or an opening, and the entire second fixing member 236 can also be configured to be made of a light-transmitting material.

[0057] Please continue to refer to Figure 5In some embodiments, the first fixing member 235 may be a cylindrical structure as a whole, and the two ends of the cylindrical structure are respectively a first end 237 and a second end 238. The second fixing member 236 may be a bowl-shaped structure with a bottom wall 2361 having a light-transmissive window 2362, and is buckled with the second end 238 of the first fixing member 235.

[0058] Please refer to Figure 6 In some embodiments, the fixing member 23 is sleeved and fixed on the outer peripheral surface of the distal end of the tube body 211, and the flexible light-transmitting member 22 is clamped and fixed directly or indirectly by the fixing member 23 and the tube body 211. In this embodiment, the structure is further simplified, and the fixing member 23 and the tube body 211 can form a clamping structure to fix the flexible light-transmitting member 22.

[0059] The flexible light-transmitting member 22 is directly clamped and fixed by the fixing member 23 and the tube body 211, which means that the fixing member 23 and the tube body 211 directly contact and clamp the flexible light-transmitting member 22. This method can simplify the structure without designing too many clamping structures. The flexible light-transmitting member 22 is indirectly clamped and fixed by the fixing member 23 and the tube body 211, which means that at least one of the fixing member 23 and the tube body 211 does not directly contact the flexible light-transmitting member 22, but contacts and clamps the flexible light-transmitting member 22 through other transition components.

[0060] In this embodiment, the fixed connection method between the fixing member 23 and the tube body 211 includes, but is not limited to, any one of welding, heat fusion, chemical connection, riveting, clamping, internal and external thread connection, interference fit and bonding, or a combination of at least two of them. In this embodiment, in order to simplify the processing technology and reduce the manufacturing difficulty, in addition to the fixing member 23 and the tube body 211 clamping the flexible light-transmitting member 22, the flexible light-transmitting member 22 may not be additionally fixed to the fixing member 23 and the tube body 211 by other means. Of course, in other embodiments, in order to enhance the fixing effect, the flexible light-transmitting member 22 may also be fixed to the fixing member 23 and the tube body 211 by any one of welding, heat fusion, chemical connection, riveting, clamping, interference fit and bonding, or a combination of at least two of them.

[0061] Please continue to refer to Figure 6 In some embodiments, the fixing member 23 has a cylindrical side wall 2311 and a bottom wall 2312 located at one end of the side wall 2311. The side wall 2311 of the fixing member 23 is sleeved and fixed on the outer peripheral surface of the distal end of the tube body 211. The bottom wall 2312 of the fixing member 23 and the end surface of the distal end of the tube body 211 clamp the flexible light-transmitting member 22. The fixing member 23 has a window 2362 for light to pass through, so as to prevent the second fixing member 236 from blocking the light from entering the endoscope 1. The window 2362 can be either open or made of a light-transmitting material. In order to form the window 2362, the fixing member 23 can only be Figure 6The window 2362 area shown is configured to be made of a light-transmitting material or an opening, and the entire fixing member 23 may also be configured to be made of a light-transmitting material.

[0062] In some other embodiments of the present application, embodiments are also provided in which the flexible light-transmitting member 22 is directly fixed to the tube body 211. In these embodiments, the design of the fixing member 23 can be omitted, thereby simplifying the structure of the guide sheath.

[0063] Please refer to Figure 2 and Figure 7 In some embodiments, the flexible light-transmitting member 22 can be directly fixed at the distal opening of the tube body 211. Figure 2 In the embodiment, the flexible light-transmitting member 22 is directly fixed to the end surface of the distal end of the tube body 211. Figure 7 In the embodiment, the flexible light-transmitting member 22 is directly fixed to the inner wall of the tube body 211. The flexible light-transmitting member 22 can be fixed to the tube body 211 by any one of welding, thermal fusion, chemical connection, riveting, clamping and bonding or a combination of at least two of them.

[0064] Please refer to Figure 8 In some embodiments, the flexible light-transmitting member 22 has a cylindrical side wall 221 and a bottom wall 222 located at one end of the cylindrical side wall 221. For example, the flexible light-transmitting member 22 can be integrally formed or formed into a bowl-shaped structure by later fixed connection. The flexible light-transmitting member 22 can be pre-formed by a mold to form a preform. The flexible light-transmitting member 22 is sleeved on the distal end of the tube body 211. The distal end of the tube body 211 is the end of the tube body 211 corresponding to the distal end of the endoscope 1. The side wall 221 of the flexible light-transmitting member 22 is in contact with the outer circumferential surface of the tube body 211, and the bottom wall 222 of the flexible light-transmitting member 22 closes the distal opening. Relative to Figure 2 and Figure 7 For the fixing scheme shown, in this embodiment, the side wall 221 of the flexible light-transmitting member 22 is fitted with the outer peripheral surface of the tube body 211, which increases the contact area between the flexible light-transmitting member 22 and the tube body 211, making it less difficult to perform the fixing process and reducing the manufacturing difficulty. Moreover, the larger contact area between the flexible light-transmitting member 22 and the tube body 211 can improve the fixed connection effect between the two, especially when welding, hot melting, chemical connection or bonding is adopted, the larger contact area is conducive to obtaining a better fixed connection effect.

[0065] The above specific examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. For those skilled in the art of the present invention, some simple deductions, deformations or substitutions can be made based on the idea of ​​the present invention.

Claims

1. A disposable sheath, characterized in that: The invention comprises a tube body and a flexible light-transmitting member, wherein the tube body has an insertion channel for inserting a mirror tube of an endoscope, the insertion channel has a distal opening, the flexible light-transmitting member is fixedly connected to the tube body through a fixing member, the flexible light-transmitting member has a bottom wall, the bottom wall closes the distal opening of the tube body, and the flexible light-transmitting member can be deformed when the mirror tube is inserted into the insertion channel and presses against the flexible light-transmitting member, so that the flexible light-transmitting member fits the endoscope.

2. The disposable sheath according to claim 1, characterized in that: The flexible light-transmitting member has a cylindrical side wall and the bottom wall located at one end of the cylindrical side wall, and the flexible light-transmitting member is sleeved on the distal end of the tube body; the side wall is in contact with the outer circumferential surface of the tube body, the fixing member is arranged along the circumference of the side wall and squeezes the side wall so that the side wall is in sealing contact with the outer circumferential surface of the tube body, and the bottom wall closes the distal end opening.

3. The disposable sheath according to claim 1, characterized in that: The fixing member has a first end and a second end that are arranged opposite to each other, and a transfer channel that passes through the first end and the second end. The first end is fixed to the tube body so that the transfer channel is sealed and connected to the insertion channel. The flexible light-transmitting member is fixed to the second end and closes the transfer channel.

4. The disposable sheath according to claim 3, characterized in that: The flexible light-transmitting member has a cylindrical side wall and the bottom wall located at one end of the cylindrical side wall; the first end of the fixing member is inserted into the tube body and is sealed and fixed to the inner wall of the tube body; the flexible light-transmitting member is sleeved on the second end of the fixing member, the side wall is attached to and sealed to the outer circumferential surface of the second end, and the bottom wall closes the opening of the transfer channel located at the second end.

5. The disposable sheath according to claim 4, characterized in that: The outer peripheral surface of the fixing member is provided with a circle of ridges, and the ridges divide the fixing member into the first end and the second end; one side of the ridges abuts against the end surface of the distal end of the tube body, and the other side of the ridges abuts against the end surface of the flexible light-transmitting member; the outer peripheral surface of the flexible light-transmitting member, the outer peripheral surface of the distal end of the tube body and the outer peripheral surface of the ridges are flush.

6. The disposable sheath according to claim 1, characterized in that: The fixing member includes a first fixing member and a second fixing member, the first fixing member is fixedly connected to the tube body, the second fixing member is fixedly connected to the first fixing member, and the flexible light-transmitting member is clamped and fixed directly or indirectly by the first fixing member and the second fixing member.

7. The disposable sheath according to claim 6, characterized in that: The first fixing member has a first end and a second end that are arranged opposite to each other, and a transfer channel that is arranged through the first end and the second end. The first end of the first fixing member is fixed to the tube body so that the transfer channel is sealed and connected to the insertion channel. The second fixing member is fixedly connected to the second end of the first fixing member and clamps the flexible light-transmitting member together with the second end of the first fixing member.

8. The disposable sheath according to claim 7, characterized in that: The second fixing member is sleeved on the second end of the first fixing member, the flexible light-transmitting member is located between the second end of the first fixing member and the second fixing member, and the second fixing member has a window for light to pass through.

9. The disposable sheath according to claim 1, characterized in that: The fixing piece is sleeved and fixed on the outer peripheral surface of the distal end of the tube body, and the flexible light-transmitting piece is clamped and fixed directly or indirectly by the fixing piece and the tube body.

10. The disposable sheath according to claim 9, characterized in that: The fixing member has a cylindrical side wall and a bottom wall located at one end of the side wall. The side wall is sleeved and fixed on the outer peripheral surface of the distal end of the tube body. The bottom wall and the end surface of the distal end of the tube body clamp the flexible light-transmitting member. The fixing member has a window for light to pass through.

11. An endoscope assembly, characterized in that: The invention comprises an endoscope and a sheath as claimed in any one of claims 1 to 10, wherein the endoscope can be inserted into an insertion channel of the sheath.

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