An insertion tube and endoscope

Abstract

The application provides an insertion tube and an endoscope, and relates to the technical field of endoscopes. The insertion tube comprises a tube body, an end of the tube body is provided with a metal conductive part, a connecting ring is sleeved outside the metal conductive part, and an elastic connecting piece is located between the metal conductive part and the connecting ring. The elastic connecting piece is in interference fit with the outer surface of the metal conductive part and the inner surface of the connecting ring, so as to conductively connect the metal conductive part and the connecting ring. The stable electrical connection between the metal conductive part and the connecting ring is realized through the elastic connecting piece, the relative position between the metal conductive part and the connecting ring can be limited through friction force, and relative displacement of the metal conductive part and the connecting ring is avoided.

Description

Technical Field

[0001] This application relates to the field of endoscope technology, and more particularly to an insertion tube and an endoscope. Background Technology

[0002] As a key component connecting the endoscope to the human body cavity, the insertion tube needs to achieve electrical conductivity with the endoscope through a metal conductive surface to meet the safety requirements of medical devices (such as leakage current control, grounding protection, etc.).

[0003] In order to connect the insertion tube to the mirror body, a metal connector is glued to the metal conductive part at its end. The connector is fixedly connected to the conductive part (such as the snake bone) of the mirror body by welding or threading.

[0004] This method can lead to a risk of non-conductivity between the metal conductive part and the contact ring, affecting the use of the endoscope. Utility Model Content

[0005] This application provides an insertion tube and an endoscope to achieve stable conductivity between the metal conductive part and the contact ring.

[0006] On one hand, this application provides an insertion tube, comprising:

[0007] A tube body, wherein the ends of the tube body have a metal conductive portion;

[0008] A connecting ring, wherein the connecting ring is sleeved on the outside of the metal conductive part;

[0009] An elastic connector is located between the metal conductive part and the connecting ring, and the elastic connector is interference-fitted with the outer surface of the metal conductive part and the inner surface of the connecting ring to electrically connect the metal conductive part and the connecting ring.

[0010] In some possible implementations, the elastic connector is provided with a clearance portion, and adhesive is filled between the tube body and the connecting ring, the adhesive passing through the clearance portion and filling between the metal conductive portion and the connecting ring.

[0011] In some possible implementations, the resilient connector includes at least one helical spring sleeved on the outside of the metal conductive portion, with at least a portion of the helical spring forming the clearance portion between adjacent effective coils.

[0012] In some possible implementations, the elastic connector includes a plurality of spring sheets, which are sequentially wound around the periphery of the metal conductive part. A portion of the spring sheet contacts the metal conductive part and a portion of the spring sheet contacts the inner surface of the contact ring. An avoidance portion is formed between adjacent spring sheets.

[0013] In some possible implementations, the elastic connector further includes an arc-shaped connecting portion that is disposed around the periphery of the metal conductive portion, and one end of the spring piece is fixedly connected to the arc-shaped connecting portion.

[0014] In some possible implementations, the inner diameter of the contact ring gradually decreases along the direction in which the metal conductive portion enters the contact ring.

[0015] In some possible implementations, the outer diameter of the metal conductive portion gradually decreases along the direction in which it enters the junction ring.

[0016] In some possible implementations, a first limiting portion is provided at one end of the connector ring, and a second limiting portion is provided on the metal conductive portion. When the metal conductive portion is inserted into the connector ring, one of the first limiting portion and the second limiting portion is inserted into the other.

[0017] In some possible implementations, the first limiting part is a limiting groove located at the end of the connecting ring facing the tube body, and the second limiting part is a limiting block disposed on the surface of the metal conductive part.

[0018] In some possible implementations, at least one of the first limiting portion and the second limiting portion is provided with a rolling ball, which is used to make the first limiting portion and the second limiting portion roll into contact.

[0019] In some possible implementations, at least one of the first limiting portion and the second limiting portion is provided with a mounting groove, and the ball is at least partially located in the mounting groove;

[0020] An elastic element is also provided in the mounting groove. One end of the elastic element is connected to the mounting groove, and the other end is in contact with the ball bearing.

[0021] In some possible implementations, one end of the elastic connector is connected to the limiting block.

[0022] On the other hand, this application provides an endoscope, including an endoscope body and an insertion tube as described in any of the first aspects, wherein the endoscope body is connected to the insertion tube via a connecting ring.

[0023] In the insertion tube and endoscope provided in this application, the insertion tube is provided with a tube body, a connecting ring, and an elastic connector. The connecting ring is sleeved on the outside of the metal conductive part of the tube body, and the elastic connector is located between the metal conductive part and the connecting ring. At the same time, the elastic connector is interference-fitted with the outer surface of the metal conductive part and the inner surface of the connecting ring. The contact between the elastic connector and the metal conductive part and the connecting ring can replace the traditional bonding process to achieve a stable conductive connection between the metal conductive part and the connecting ring. At the same time, the friction force generated by the interference fit can directly form a mechanical fixation between the metal conductive part and the connecting ring to help limit the relative position between the metal conductive part and the connecting ring. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0025] Figure 1 An exploded view of the insertion tube provided in an embodiment of this application;

[0026] Figure 2 This is a schematic diagram of one embodiment of the insertion tube provided in this application.

[0027] Figure 3 This is a schematic diagram of the structure of the spring in the insertion tube provided in an embodiment of this application;

[0028] Figure 4 This is a schematic diagram of the structure of the connecting part in the insertion tube provided in an embodiment of this application;

[0029] Figure 5 This is a schematic diagram of the connector in the insertion tube provided in an embodiment of this application;

[0030] Figure 6 This is a schematic diagram of the structure of the metal conductive part in the insertion tube provided in an embodiment of this application;

[0031] Figure 7 A schematic diagram of another embodiment of the insertion tube provided in this application;

[0032] Figure 8 This is a schematic diagram of the structure of the first limiting part in the insertion tube provided in an embodiment of this application;

[0033] Figure 9 This is a schematic diagram of the structure of an endoscope provided in an embodiment of this application;

[0034] Figure 10 This is a schematic diagram of the connection structure between the insertion tube and the endoscope body in an embodiment of this application.

[0035] Explanation of reference numerals in the attached figures:

[0036] 10-Insert tube;

[0037] 20-Mirror body;

[0038] 21-Snake bone;

[0039] 30 - Operations Section;

[0040] 40-Host;

[0041] 100-tube body;

[0042] 110 - Metallic conductive part;

[0043] 120 - Second limiting part;

[0044] 200-connector;

[0045] 210 - First limiting part;

[0046] 211-Ball bearing;

[0047] 212-Elastic element;

[0048] 213 - Mounting slot;

[0049] 220 - First hole section;

[0050] 230 - Second hole section;

[0051] 240 - Transition surface;

[0052] 300 - Flexible connector;

[0053] 310 - Coil spring;

[0054] 320 - Avoidance section;

[0055] 330-shrapnel;

[0056] 340 - Arc-shaped connection.

[0057] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the specific technical solutions of this application will be further described in detail below with reference to the accompanying drawings of the embodiments of this application. The following embodiments are used to illustrate this application, but are not intended to limit the scope of this application.

[0059] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0060] Furthermore, in the embodiments of this application, directional terms such as "upper," "lower," "left," and "right" are defined relative to the positions in which the components are schematically placed in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the position of the components in the accompanying drawings.

[0061] In the embodiments of this application, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can mean a fixed connection, a detachable connection, or an integral part; it can mean a direct connection or an indirect connection through an intermediate medium.

[0062] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0063] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0064] This application provides an endoscope, which is a diagnostic and treatment instrument capable of viewing the inside of the human body. Most endoscopes adopt the principle of electronic endoscope systems, using a charge-coupled device (CCD) at the tip to convert light signals into electrical signals, which are then processed by a video system and converted into images on a monitor.

[0065] Please see Figure 1 , Figure 9 and Figure 10As shown, the endoscope includes a main unit 40, an operating unit 30, an insertion tube 10, and a scope body 20. The rear end of the insertion tube 10 is connected to the operating unit 30, which is connected to the main unit 40 via a dedicated cable. A metal conductive part 110 is provided at the front end of the insertion tube, and a metal contact ring 200 is connected to the metal conductive part 110. The contact ring 200 is fixedly connected to a conductive component of the scope body 20, such as a snake skeleton 21, by welding or threading, enabling electrical conduction between the metal conductive part 110 and the snake skeleton 21 to meet the safety requirements of medical devices (such as leakage current control and grounding protection). The doctor can issue commands to the main unit 40 through the operating unit 30. The main unit 40, based on the received commands, transmits illumination energy and control signals to the scope body 20 through the cable or optical fiber inside the insertion tube 10, and receives images acquired by the scope body 20 for storage and processing.

[0066] Currently, the metal conductive part 110 is generally inserted into the contact ring 200 and then fixedly connected to the contact ring 200 by adhesive. This connection method has at least the following drawbacks:

[0067] 1. Poor conductivity reliability: It is susceptible to factors such as uneven curing of adhesive and insufficient contact area between the connector 200 and the metal conductive part 110, which may lead to excessive contact resistance or partial disconnection between the connector 200 and the insertion tube 10, thus failing to meet safety requirements.

[0068] 2. High positioning accuracy required: During the bonding process, the orientation of the connector 200 and the metal conductive part 110 must be strictly aligned. If the operator does not accurately control the angle or position, the connector 200 may be offset or misaligned, leading to difficulties in subsequent assembly or failure of conductivity.

[0069] 3. Low production efficiency: The bonding and positioning processes rely on manual operation, which is time-consuming and prone to human error, increasing production costs and the difficulty of quality control.

[0070] Based on this, please see Figure 1 As shown, this application embodiment provides an insertion tube 10, including a tube body 100, a connecting ring 200, and an elastic connector 300.

[0071] The end of the tube body 100 has a metal conductive part 110, and the connecting ring 200 has an annular structure. The connecting ring 200 is sleeved on the outside of the metal conductive part 110 and forms an installation gap with the metal conductive part 110. The connecting ring 200 can be provided with external threads so that the connecting ring 200 can be directly threaded to the snake bone 21.

[0072] The elastic connector 300 is located within the installation gap and is interference-fitted with both the inner surface of the connecting ring 200 and the outer surface of the metal conductive part 110.

[0073] The elastic connector 300 is made of a conductive material, such as a metal with a certain elasticity. It can be deformed by the compression of the ring 200 and the metal conductive part 110, and can be pressurized with the metal conductive part 110 and the ring 200.

[0074] For example, the cross-sections of the tube body 100, the metal conductive part 110, and the connector 200 are all circular.

[0075] It is understood that the cross-sections of the tube body 100, the metal conductive part 110, and the connector 200 may also be other shapes, such as elliptical. This is only an example for illustration and not a limitation.

[0076] In addition, the contact ring 200 can be made of conductive materials such as copper or stainless steel, the metal conductive part 110 can also be made of conductive metal materials such as stainless steel or copper, and the tube body 100 is usually made of polymer materials.

[0077] Specifically, the elastic connector 300 is disposed between the retaining ring 200 and the metal conductive part 110 in an interference fit manner. The contact between the elastic connector 300 and the metal conductive part 110 and the retaining ring 200 can replace the traditional glue bonding process, so as to achieve a stable conductive connection between the metal conductive part 110 and the retaining ring 200. At the same time, the friction force generated by the interference fit can directly form a mechanical fixation between the metal conductive part 110 and the retaining ring 200, so as to help limit the relative position between the metal conductive part 110 and the retaining ring 200.

[0078] Further, please see Figure 2 As shown, in some embodiments of this application, the elastic connector 300 is provided with a clearance portion 320, and adhesive is filled between the tube body 100 and the connecting ring 200. The adhesive passes through the clearance portion 320 and fills the space between the metal conductive portion 110 and the connecting ring 200.

[0079] The elastic connector 300 is located between the connecting ring 200 and the metal conductive part 110, separating the metal conductive part 110 and the connecting ring 200. After adding the clearance part 320 to the elastic connector 300, the adhesive can flow freely on both sides of the elastic connector 300 through the clearance part 320, thereby uniformly filling the gap between the connecting ring 200 and the metal conductive part 110, and bonding with the inner surface of the connecting ring 200, the outer surface of the metal conductive part 110, and the surface of the elastic connector 300, further improving the stability of the connection between the connecting ring 200 and the metal conductive part 110. While ensuring the conductivity, it can also prevent relative displacement between the connecting ring 200 and the metal conductive part 110.

[0080] Understandably, the adhesive can be any commonly used glue, as long as it can effectively bond the connecting ring 200, the elastic connector 300, and the metal conductive part 110.

[0081] During bonding, the adhesive can be pre-filled into the connecting ring 200. After the elastic connector 300 is interference-fitted with the connecting ring 200 and the metal conductive part 110, the adhesive is then cured. The adhesive can effectively connect the metal conductive part 110, the connecting ring 200 and the elastic connector.

[0082] To facilitate the filling of adhesive, the connector 200 may include a first hole segment 220 and a second hole segment 230. The inner diameter of the first hole segment 220 is smaller than the inner diameter of the second hole segment 230, thereby forming a transition surface 240 between the two. After the metal conductive part 110 is inserted into the second hole segment, it abuts against the transition surface 240. The diameter of the first hole segment 220 is adapted to the diameter of the hole in the metal conductive part 110, and they are connected.

[0083] The conductive metal part 110 can form an installation gap with the hole wall and transition surface 240 of the second hole section 230. The elastic connector 300 and the adhesive are both located in the installation gap, which facilitates the pre-filling of adhesive and limits the elastic connector 300.

[0084] Furthermore, based on this, the elastic connector 300 has at least the following two structures:

[0085] For example, please see Figure 2 As shown, the elastic connector 300 includes at least one helical spring 310, which is sleeved on the outside of the metal conductive part 110. An avoidance part 320 is formed between adjacent effective coils of the helical spring 310 (coils that directly participate in the deformation of the spring under force and play a core role in the elastic performance of the spring). That is, when the helical spring 310 is located between the connecting coil 200 and the metal conductive part 110, there is a gap between at least some of the adjacent effective coils. This gap is the avoidance part 320, which allows the adhesive to flow.

[0086] During assembly, the helical spring 310 can be first placed on the outside of the metal conductive part 110, and then the helical spring 310 and the metal conductive part 110 can be inserted into the connector 200. During the insertion process, the helical spring 310 will be partially compressed, so that the helical spring 310, the metal conductive part 110 and the connector 200 achieve an interference fit, so that the relative position between the metal conductive part 110 and the connector 200 will not change during the bonding process of the adhesive.

[0087] It is understandable that one or more helical springs 310 can be provided, and when multiple springs are provided, they can be arranged sequentially along the axial direction of the metal conductive part 110.

[0088] When multiple helical springs 310 are provided, the contact stress can be dispersed by the helical springs 310, avoiding the risk of partial disconnection and further improving the reliability of conduction.

[0089] For example, please see Figure 1 , Figure 2 and Figure 3 As shown, the elastic connector 300 includes a plurality of spring pieces 330, which are sequentially arranged around the periphery of the metal conductive part 110. Parts of the spring pieces 330 are in contact with the metal conductive part 110, and parts of the spring pieces 330 are in contact with the inner surface of the connecting ring 200. A clearance portion 320 is formed between adjacent spring pieces 330.

[0090] When the metal conductive part 110 is inserted into the connector ring 200, the spring piece 330 can achieve conductive connection by abutting against the outer surface of the metal conductive part 110 and the inner surface of the connector ring 200. At the same time, the relative position between the metal conductive part 110 and the connector ring 200 is limited by frictional force to prevent relative displacement between the two during the bonding process.

[0091] The shape of the spring 330 can be adjusted according to the actual situation. For example, the spring 330 can be set to a structure similar to the "Z" shape or a wave shape. As long as part of the spring 330 is in contact with the metal conductive part 110 and part of the spring 330 is in contact with the inner surface of the ring 200, it can abut against the metal conductive part 110 and the ring 200 respectively, effectively conducting and limiting the movement.

[0092] In addition, the multiple spring pieces 330 can be independent of each other or connected to fix their relative positions.

[0093] For example, please see Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the elastic connector 300 also includes an arc-shaped connecting portion 340, which is arranged around the periphery of the metal conductive portion 110, and one end of the spring piece 330 is fixedly connected to the arc-shaped connecting portion 340.

[0094] The two ends of the arc-shaped connecting part 340 are not connected. Its overall shape is adapted to the outer surface of the metal conductive part 110 and can be sleeved on the outside of the metal conductive part 110. When sleeved, the arc-shaped connecting part 340 can deform, and the metal conductive part 110 is inserted into the inside of the arc-shaped connecting part 340 from the gap between the two ends. Then the arc-shaped connecting part 340 returns to its deformation and covers the outside of the metal conductive part 110, so that a part of the spring piece 330 contacts the metal conductive part 110.

[0095] After the metal conductive part 110 is inserted into the connector 200, the spring piece 330 will be compressed, causing the spring piece 330 to deform and come into contact with the metal conductive part 110 and the connector 200 to conduct electricity and limit the movement.

[0096] After the spring piece 330 is connected by the arc-shaped connecting part 340, the position of the spring piece 330 can be effectively restricted and the assembly difficulty can be reduced.

[0097] It is understandable that the spring 330 and the arc-shaped connecting part 340 can be integrally formed, or they can be separately processed and then connected by common methods such as welding.

[0098] Alternatively, two arc-shaped connecting parts 340 can be provided, which are respectively connected to both ends of the spring piece 330 to improve the limiting effect of the spring piece 330.

[0099] Further, please see Figure 1 and Figure 5 As shown, in some embodiments of this application, the inner diameter of the contact ring 200 gradually decreases along the direction in which the metal conductive portion 110 enters the contact ring 200.

[0100] This allows the connector 200 to form a horn-like structure at one end for the metal conductive part 110 to be inserted, thereby reducing the difficulty for the metal conductive part 110 and the elastic connector 300 to enter the connector 200. Furthermore, the elastic connector 300 can deform, so that even if the inner diameter of the connector 200 changes gradually, it can still effectively make an interference fit with the connector 200 and the metal conductive part 110.

[0101] To further reduce the difficulty of assembly, please refer to [link / reference]. Figure 1 and Figure 6 As shown, along the direction in which the metal conductive part 110 enters the contact ring 200, the outer diameter of the metal conductive part 110 gradually decreases.

[0102] Furthermore, in some embodiments of this application, please refer to Figure 2 , Figure 3 and Figure 7 As shown, a first limiting part 210 is provided at one end of the connecting ring 200, usually at the end of the connecting ring 200 facing the tube body 100. A second limiting part 120 is provided on the metal conductive part 110. When the metal conductive part 110 is inserted into the connecting ring 200, one of the first limiting part 210 and the second limiting part 120 is inserted into the other.

[0103] When the metal conductive part 110 is inserted into the connector ring 200, the relative positions of the connector ring 200 and the metal guide can be adjusted so that they are opposite each other. After the metal conductive part 110 enters the connector ring 200, one of the first limiting part 210 and the second limiting part 120 is inserted into the other, which can further prevent the connector ring 200 and the metal conductive part 110 from rotating. Moreover, it can be directly positioned during assembly without the need for manual positioning by feel, which can effectively improve the connection accuracy and connection stability of the metal conductive part 110 and the connector ring 200.

[0104] It is understood that one or more of the first limiting part 210 and the second limiting part 120 can be provided, and the specific arrangement can be adjusted according to the actual situation. When multiple parts are provided, they can be arranged around the periphery of the metal conductive part 110.

[0105] For example, the first limiting part 210 is a limiting groove located at the end of the connecting ring 200 facing the tube body 100, and the second limiting part 120 is a limiting block provided on the surface of the metal conductive part 110.

[0106] During connection, the limiting block is aligned with the limiting groove. As the metal conductive part 110 is inserted deeper into the connecting ring 200, the limiting block gradually inserts into the limiting groove, thereby preventing relative rotation between the metal conductive part 110 and the connecting ring 200 during adhesive bonding, effectively improving the connection accuracy between the metal conductive part 110 and the connecting ring 200. Furthermore, during use, the cooperation between the limiting block and the limiting groove can also reduce the torsional force on the connecting parts due to the adhesive elasticity, reducing the risk of connection failure between the metal conductive part 110 and the connecting ring 200. Of course, the first limiting part 210 can also be inserted into the second limiting part 120; this is merely an example and not a limitation.

[0107] For further information, please see [link / reference]. Figure 2 , Figure 7 and Figure 8 As shown, one or more balls 211 can be rotatably disposed on the first limiting part 210 and / or the second limiting part 120. When one of the first limiting part 210 and the second limiting part 120 is inserted into the other, the balls 211 can change the sliding friction between the first limiting part 210 and the second limiting part 120 into rolling friction, effectively reducing the resistance of the connection between the first limiting part 210 and the second limiting part 120, and reducing the difficulty of connecting the metal conductive part 110 and the connecting ring 200.

[0108] It is understandable that the ball 211 is disposed on the side of the first limiting part 210 facing the second limiting part 120, or on the side of the second limiting part 120 facing the first limiting part 210. That is, when the first limiting part 210 and the second limiting part 120 move relative to each other, they can directly make rolling contact through the ball 211.

[0109] Furthermore, a mounting groove 213 may be provided on the first limiting part 210 or the second limiting part 120, and the ball 211 is at least partially located in the mounting groove 213. An elastic element 212 is also provided in the mounting groove 213.

[0110] The elastic element 212 can be connected to the bottom of the mounting groove 213 at one end and to the ball 211 at the other end, but not connected, so as not to affect the rotation of the ball 211 relative to the mounting groove 213.

[0111] Taking the installation groove 213 as an example, when the limiting block is inserted into the limiting groove, it will make rolling contact with the ball 211 and can also apply a squeezing force to the ball 211.

[0112] When the size of the limiting block is slightly larger, the ball 211 can compress the elastic element 212 under the push of the limiting block, so that the ball 211 moves a certain distance into the mounting groove 213, so as not to affect the entry of the limiting block into the limiting groove.

[0113] When the size of the limiting block is slightly smaller, the ball 211 can move toward the limiting block under the push of the elastic element 212 and make rolling contact with the limiting block. This not only reduces frictional resistance, but also helps to limit the position of the limiting block in the limiting groove.

[0114] Understandably, the ball 211 rotates only relative to the mounting groove 213 and can partially retract or extend from the mounting groove 213 without disengaging from it.

[0115] For example, a limiting protrusion can be provided at the entrance end of the mounting groove 213, and the ball 211 is spherical. The limiting protrusion surrounds and forms a channel with a size slightly smaller than the maximum cross-sectional size of the ball 211. The area corresponding to the maximum cross-section of the ball 211 is located within the mounting groove 213, so that the position of the ball 211 can be restricted by the limiting protrusion to prevent the ball 211 from detaching from the mounting groove 213.

[0116] Alternatively, the limiting protrusion facing the elastic element 212 can be made into an arc shape that matches the surface of the ball 211, so as not to affect the rotation of the ball 211.

[0117] In application, one end of the elastic connector 300 abuts against the transition surface 240 on the connecting ring 200, while the other end is a free end with no limit. At this time, the free end of the elastic connector 300 can be directly connected to the section of the limiting block facing the connecting ring 200, such as by welding, screwing, snap-fitting, etc.

[0118] When the elastic connector 300 is a helical spring 310, the limiting block can restrict the end position of the helical spring 310 to prevent the effective coil distance of the helical spring 310 from being too close, thereby ensuring that the clearance part 320 can effectively allow the adhesive to pass through.

[0119] When the elastic connector 300 is a spring sheet 330, the limiting block and the transition surface 240 can restrict the position of the spring sheet 330 and improve the positioning effect of the spring sheet 330.

[0120] Furthermore, in some embodiments of this application, a conductive coating, such as a silver coating, can be applied to the inner surface of the connector 200 to further reduce the contact resistance between the elastic connector 300 and the connector 200, thereby effectively improving the conductivity between the connector 200 and the elastic connector 300 and improving the performance of the endoscope.

[0121] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0122] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. An insertion tube, characterized in that, include: A tube body, wherein the ends of the tube body have a metal conductive portion; A connecting ring, wherein the connecting ring is sleeved on the outside of the metal conductive part; An elastic connector is located between the metal conductive part and the connecting ring, and the elastic connector is interference-fitted with the outer surface of the metal conductive part and the inner surface of the connecting ring to electrically connect the metal conductive part and the connecting ring.

2. The insertion tube according to claim 1, characterized in that, The elastic connector is provided with a clearance portion, and adhesive is filled between the tube body and the connecting ring. The adhesive passes through the clearance portion and fills the space between the metal conductive part and the connecting ring.

3. The insertion tube according to claim 2, characterized in that, The elastic connector includes at least one helical spring, which is sleeved on the outside of the metal conductive part, and the clearance portion is formed between at least a portion of adjacent effective coils of the helical spring.

4. The insertion tube according to claim 2, characterized in that, The elastic connector includes a plurality of spring pieces, which are sequentially wound around the periphery of the metal conductive part. A portion of the spring piece contacts the metal conductive part, and a portion of the spring piece contacts the inner surface of the contact ring. An avoidance portion is formed between adjacent spring pieces.

5. The insertion tube according to claim 4, characterized in that, The elastic connector further includes an arc-shaped connecting portion, which is arranged around the periphery of the metal conductive portion, and one end of the spring piece is fixedly connected to the arc-shaped connecting portion.

6. The insertion tube according to claim 1, characterized in that, Along the direction in which the conductive metal portion enters the contact ring, the inner diameter of the contact ring gradually decreases.

7. The insertion tube according to claim 1, characterized in that, Along the direction in which the metal conductive part enters the junction ring, the outer diameter of the metal conductive part gradually decreases.

8. The insertion tube according to claim 1, characterized in that, One end of the connector is provided with a first limiting part, and the metal conductive part is provided with a second limiting part. When the metal conductive part is inserted into the connector, one of the first limiting part and the second limiting part is inserted into the other.

9. The insertion tube according to claim 8, characterized in that, The first limiting part is a limiting groove located at the end of the connecting ring facing the tube body, and the second limiting part is a limiting block disposed on the surface of the metal conductive part.

10. The insertion tube according to claim 8, characterized in that, At least one of the first limiting part and the second limiting part is provided with a rolling ball, which is used to make the first limiting part and the second limiting part roll into contact.

11. The insertion tube according to claim 10, characterized in that, At least one of the first limiting part and the second limiting part is provided with a mounting groove, and the ball is at least partially located in the mounting groove; An elastic element is also provided in the mounting groove. One end of the elastic element is connected to the mounting groove, and the other end is in contact with the ball bearing.

12. The insertion tube according to claim 9, characterized in that, One end of the elastic connector is connected to the second limiting part.

13. An endoscope, characterized in that, It includes a scope body and an insertion tube as described in any one of claims 1-12, wherein the scope body has a snake-like structure, and the snake-like structure is connected to the insertion tube via a connecting ring.

Images