Tube body assembly, assembly method of tube body assembly and endoscope

Abstract

The invention relates to the technical field of medical instruments, and provides a tube body assembly, an assembly method of the tube body assembly and an endoscope, and the tube body assembly comprises a snake bone tube, an insertion tube and a connecting tube. The snake-bone pipe is at least used for guiding the direction of insertion movement, the insertion pipe is used for pushing the snake-bone pipe to move, the connecting pipe is provided with a first end and a second end which are opposite in the axial direction, the first end of the connecting pipe is connected with the snake-bone pipe, and the second end of the connecting pipe is connected with the insertion pipe. The connecting relation between the connecting pipe and the snake-bone pipe and the inserting pipe is adjusted by adjusting the connecting relation between the connecting pipe and the snake-bone pipe, connection of snake-bone pipes and inserting pipes of different size relations is achieved, the connecting mode of the snake-bone pipes and the inserting pipes is simplified, and the production cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a tube body assembly, an assembly method of the tube body assembly, and an endoscope. Background Art

[0002] An endoscope is a commonly used medical device. During use, the endoscope enters the patient's body through a natural body orifice or an incision formed during surgery. After the endoscope is introduced into the organ to be examined, the doctor can directly observe the pathological conditions of the relevant parts. To clearly and intuitively understand the pathological parts and improve the accuracy of pathological diagnosis, the endoscope plays a crucial role during the operation.

[0003] Related endoscopes include a handle, an insertion tube, a snake bone, and a distal end head. The snake bone and the insertion tube usually use two different materials, and the two parts need to be connected through a structural member to ensure product performance. The snake bone is usually processed by cutting a metal tube, and a few are realized by using plastic injection molded parts. The insertion tube uses a multi-layer composite tube. The metal snake bone and the multi-layer composite insertion tube are generally connected by using a transparent injection molded part or a metal sleeve with glue bonding.

[0004] However, the mold injection process of plastic injection molded parts has limitations. It is necessary to ensure a sufficient wall thickness to ensure the yield rate of mass production, which will result in a larger outer diameter or a smaller inner diameter of the component, and cannot meet the production or product performance. At the same time, due to the different materials and wall thicknesses of the snake bone and the insertion tube, there are differences in both the inner and outer diameters. The metal sleeve cannot achieve connection transition, and using the methods of stamping flaring or turning processing will result in too high costs and is not conducive to mass production. Summary of the Invention

[0005] In view of this, the present invention provides a tube body assembly, an assembly method of the tube body assembly, and an endoscope to solve the technical problem of the difficult connection between the snake bone tube and the insertion tube.

[0006] To solve the above problems, the technical solution of the present invention is realized as follows:

[0007] A tube body assembly is applied to an endoscope. The tube body assembly includes: a snake bone tube, at least used to guide the direction of the insertion movement; an insertion tube, used to push the snake bone tube to move; a connecting tube, having a first end and a second end opposite to each other along the axial direction; wherein, the first end of the connecting tube is connected to the snake bone tube, and the second end of the connecting tube is connected to the insertion tube.

[0008] In some embodiments, the inner and outer diameters of the snake bone tube and the insertion tube are correspondingly equal; wherein, the first end of the connecting tube is inserted into the snake bone tube, and the second end of the connecting tube is inserted into the insertion tube; or the first end of the connecting tube is sleeved outside the snake bone tube, and the second end of the connecting tube is sleeved outside the insertion tube.

[0009] In some embodiments, at least the outer diameter of the snake bone tube and the outer diameter of the insertion tube are not equal; wherein, the connecting tube includes a first tube body and a second tube body, the second end of the first tube body is connected to the first end of the second tube body, the snake bone tube is connected to the second end of the first tube body, and the insertion tube is connected to the second end of the second tube body.

[0010] In some embodiments, the second end of the first tube body is inserted into the first end of the second tube body; or the second end of the first tube body is sleeved outside the first end of the second tube body.

[0011] In some embodiments, the snake bone tube is sleeved outside the second end of the first tube body; the insertion tube is inserted into the second end of the second tube body or the insertion tube is sleeved outside the second end of the second tube body.

[0012] In some embodiments, the snake bone tube is inserted into the second end of the first tube body; the insertion tube is inserted into the second end of the second tube body or the insertion tube is sleeved outside the second end of the second tube body.

[0013] In some embodiments, a thermoplastic layer is provided on the outside of the tube body assembly, and both the snake bone tube and the connecting tube are metal pipe fittings.

[0014] An embodiment of the present invention further provides an assembly method, which is applied to the assembly of the above-mentioned tube body assembly. The assembly method includes: comparing the inner and outer diameter dimensions of the insertion tube and the snake bone tube to obtain dimension comparison information; selecting a connection method between the insertion tube, the snake bone tube and the connecting tube according to the dimension comparison information; after selecting the connection method and completing the preliminary connection, performing connection processing on the connection part, and then checking the assembly quality.

[0015] In some embodiments, according to the dimension comparison information, when the inner and outer diameter dimensions of the insertion tube and the snake bone tube are equal, the first end of the connecting tube is inserted into the snake bone tube or sleeved outside the snake bone tube; the second end of the connecting tube is inserted into the insertion tube or sleeved outside the insertion tube; when at least the outer diameters of the insertion tube and the snake bone tube are not equal, the connecting tube is set to include a first tube body and a second tube body with different inner diameters, and according to the dimension matching degree, the second end of the first tube body is inserted into the first end of the second tube body or the second end of the first tube body is sleeved outside the first end of the second tube body; and the first end of the first tube body is inserted into the snake bone tube or sleeved outside the snake bone tube, and the second end of the second tube body is inserted into the insertion tube or sleeved outside the insertion tube.

[0016] In some embodiments, the inspection of the assembly quality at least includes inspecting at least one of the coaxiality, airtightness, and appearance between the insertion tube and the connection tube after the connection between the insertion tube and the connection tube is completed.

[0017] An embodiment of the present invention further provides an endoscope, including: the tube body assembly described in any one of the above embodiments, wherein the tube body assembly is assembled by the assembly method described in any one of the above embodiments; a distal end assembly inserted at one end of the tube body assembly close to the snake bone tube; and a handle portion connected to the other end of the tube body assembly and at least controlling the operation of the distal end assembly.

[0018] A tube body assembly, an assembly method of the tube body assembly, and an endoscope provided by an embodiment of the present invention. The tube body assembly includes a snake bone tube, an insertion tube, and a connection tube. The snake bone tube is at least used to guide the direction of the insertion movement, and the insertion tube is used to push the snake bone tube to move. The connection tube has opposite first and second ends in the axial direction. The first end of the connection tube is connected to the snake bone tube, and the second end of the connection tube is connected to the insertion tube. In this way, by providing the connection tube and adjusting the connection relationship between the connection tube and the snake bone tube and the connection tube and the insertion tube according to the diameter size relationship between the snake bone tube and the insertion tube, the connection between the snake bone tube and the insertion tube with different size relationships can be realized under the connection action of the connection tube, simplifying the connection method between the snake bone tube and the insertion tube and reducing the production cost. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the first assembly method of the tube body assembly provided by an embodiment of the present invention;

[0020] Figure 2 It is a schematic cross-sectional structural diagram of the first assembly method of the tube body assembly provided by an embodiment of the present invention;

[0021] Figure 3 It is a schematic structural diagram of the second assembly method of the tube body assembly provided by an embodiment of the present invention;

[0022] Figure 4 It is a schematic cross-sectional structural diagram of the second assembly method of the tube body assembly provided by an embodiment of the present invention;

[0023] Figure 5 It is a schematic cross-sectional structural diagram of the third assembly method of the tube body assembly provided by an embodiment of the present invention;

[0024] Figure 6 It is a schematic cross-sectional structural diagram of the fourth assembly method of the tube body assembly provided by an embodiment of the present invention;

[0025] Figure 7 It is a schematic overall structural diagram of the endoscope provided by an embodiment of the present invention;

[0026] Description of the reference numerals in the drawings:

[0027] 1. Endoscope; 10. Tube body assembly; 20. Tip assembly; 30. Handle part; 101. Snake bone tube; 102. Insertion tube; 103. Connecting tube; 1301. First end of the connecting tube; 1302. Second end of the connecting tube; 1031. First tube body; 1032. Second tube body. Detailed implementation manners

[0028] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0029] In the various specific technical features described in the specific embodiments, without contradiction, they can be combined in any appropriate manner. For example, different embodiments and technical solutions can be formed by combining different specific technical features. To avoid unnecessary repetition, various possible combination methods of the specific technical features in the present invention will not be described separately.

[0030] In the following description, the terms "first / second / ..." involved are only used to distinguish different objects and do not indicate that there is any same or related relationship between the objects. It should be understood that the orientation descriptions "above", "below", "outside", "inside" involved are all the orientations in the normal use state, and the "left" and "right" directions represent the left and right directions shown in the specific corresponding schematic diagram, which can be the left and right directions in the normal use state or not.

[0031] It should be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including the element. "Plurality" means greater than or equal to two.

[0032] Such as Figure 1As shown in the figure, a tube assembly 10 provided by an embodiment of the present invention is applied to an endoscope 1. The tube assembly 10 includes a snake bone tube 101, an insertion tube 102, and a connecting tube 103. The snake bone tube 101 can be bent and deformed, so as to at least be used to guide the direction of the insertion movement. The insertion tube 102 is used to transmit the driving force during pushing, so as to realize the movement of the snake bone tube 101. The connecting tube 103 has opposite first end 1301 and second end 1302 in the axial direction. The first end 1301 of the connecting tube is connected to the snake bone tube 101, and the second end 1302 of the connecting tube is connected to the insertion tube 102.

[0033] It can be understood that the tube assembly 10 in the endoscope 1 is used to enter a target position in the human body along a natural body orifice or a surgical opening position, and perform inspections and surgeries on the target position. The snake bone tube 101 can be bent in the human body, and the insertion tube 102 pushes the snake bone tube 101 to move in the human body. The snake bone tube 101 and the insertion tube 102 are connected to both ends of the connecting tube 103. In the direction of the axis Z, the connecting tube 103 has opposite first end 1301 and second end 1302. The first end 1301 of the connecting tube is inserted into the snake bone tube 101 or sleeved outside the snake bone tube 101, and the second end 1302 of the connecting tube is inserted into the insertion tube 102 or sleeved outside the insertion tube 102. The specific connection method can be determined according to the diameter size relationship between the connecting tube 103, the snake bone tube 101, and the insertion tube 102. In this way, the snake bone tube 101 and the insertion tube 102 are directly connected into one body through the connecting tube 103, simplifying the connection method between the snake bone tube 101 and the insertion tube 102, and reducing the connection difficulty of the tube assembly 10.

[0034] A tube assembly 10 provided by an embodiment of the present invention includes a snake bone tube 101, an insertion tube 102, and a connecting tube 103. The snake bone tube 101 is at least used to guide the direction of the insertion movement, the insertion tube 102 is used to push the snake bone tube 101 to move, and the connecting tube 103 has opposite first end and second end in the axial direction. The first end 1301 of the connecting tube is connected to the snake bone tube 101, and the second end 1302 of the connecting tube is connected to the insertion tube 102. In this way, by providing the connecting tube 103 and adjusting the connection relationship between the connecting tube 103 and the snake bone tube 101 and the connection relationship between the connecting tube 103 and the insertion tube 102 according to the diameter size relationship between the snake bone tube 101 and the insertion tube 102, the connection between the snake bone tube 101 and the insertion tube 102 with different size relationships can be realized under the connection action of the connecting tube 103, simplifying the connection method between the snake bone tube 101 and the insertion tube 102, and reducing the production cost.

[0035] In some embodiments, such as Figure 1 and Figure 2As shown, when connecting the snake bone tube 101 and the insertion tube 102 with equal inner and outer diameters, the first end 1301 of the connecting tube can be inserted into the snake bone tube 101, and the second end 1302 of the connecting tube can be inserted into the insertion tube 102; or the first end 1301 of the connecting tube can be sleeved outside the snake bone tube 101, and the second end 1302 of the connecting tube can be sleeved outside the insertion tube 102. That is, the outer diameter of the connecting tube 103 can be selected to be smaller than the inner diameters of the snake bone tube 101 and the insertion tube 102, and then the two ends of the connecting tube 103 can be respectively inserted into the snake bone tube 101 and the insertion tube 102, or the inner diameter of the connecting tube 103 can be selected to be larger than the outer diameters of the snake bone tube 101 and the insertion tube 102, and then the two ends of the connecting tube 103 can be respectively sleeved outside the snake bone tube 101 and the insertion tube 102. The connection method has good flexibility.

[0036] It can be understood that when the inner and outer diameters of the snake bone tube 101 and the insertion tube 102 are equal, only one tube body of the connecting tube 103 is provided. When the outer diameters of the snake bone tube 101 and the insertion tube 102 are less than or equal to the inner diameter of the connecting tube 103, the snake bone tube 101 is inserted into the first end 1301 of the connecting tube, and the insertion tube 102 is inserted into the second end 1302 of the connecting tube, and the ends of the snake bone tube 101 and the insertion tube 102 abut against each other inside the connecting tube 103 (refer to Figure 2 ); when the inner diameters of the snake bone tube 101 and the insertion tube 102 are greater than or equal to the outer diameter of the connecting tube, the snake bone tube 101 is sleeved outside the first end 1301 of the connecting tube, and the insertion tube 102 is sleeved outside the second end 1302 of the connecting tube, and the ends of the snake bone tube 101 and the insertion tube 102 abut against each other outside the connecting tube 103. After connecting the snake bone tube 101 and the connecting tube 103, and the insertion tube 102 and the connecting tube 103, the connection part is processed so that the tube body assembly 10 is fixedly connected as a whole. That is, the connection between the snake bone tube 101 and the insertion tube 102 can be realized through a single connecting tube 103, which simplifies the structure of the connecting tube 103. At the same time, by reducing the wall thickness of the single connecting tube 103, the wall thickness of the connection part can be reduced, which is convenient for reducing the outer diameter of the tube body assembly 10 or increasing the inner diameter size of the tube body assembly 10.

[0037] In the embodiment of the present invention, the snake bone tube 101 and the insertion tube 102 with equal inner and outer diameters are connected as a whole through a single connecting tube 103. The snake bone tube 101 and the insertion tube 102 can be inserted inside the connecting tube 103 or sleeved outside the connecting tube 103 to complete the connection, which reduces the difficulty in the assembly process. At the same time, by restricting the wall thickness of the connecting tube 103, the wall thickness of the connection part can be reduced, thereby reducing the outer diameter size or the inner diameter size of the tube body assembly 10, and improving the structure of the tube body assembly 10.

[0038] In some embodiments, such as Figure 3 and Figure 4As shown, when connecting the snake bone tube 101 and the insertion tube 102 with at least unequal outer diameters, the connecting tube 103 can be set to include a first tube body 1031 and a second tube body 1032. The second end of the first tube body 1031 is connected to the first end of the second tube body 1032. The snake bone tube 101 is connected to the first end of the first tube body 1031, and the insertion tube 102 is connected to the second end of the second tube body 1032.

[0039] That is to say, when at least the outer diameters of the snake bone tube 101 and the insertion tube 102 are not equal, the tube body of the connecting tube 103 is provided with two parts, that is, the connecting tube 103 is formed by connecting the first tube body 1031 and the second tube body 1032. Along the axis Z direction, both the first tube body 1031 and the second tube body 1032 have opposite first ends and second ends. During the connection process of the first tube body 1031 and the second tube body 1032, the second end of the first tube body 1031 is connected to the first end of the second tube body 1032 to form the connecting tube 103. At this time, the first end of the first tube body 1031 is the first end 1301 of the connecting tube, and the second end of the second tube body 1032 is the second end 1302 of the connecting tube. The snake bone tube 101 is connected to the first end of the first tube body 1031 (the first end 1301 of the connecting tube), and the insertion tube 102 is connected to the second end of the second tube body 1032 (the second end 1302 of the connecting tube). Since the inner and outer diameters of the snake bone tube 101 and the insertion tube 102 are different, there is a radial dimension difference between the snake bone tube 101 and the insertion tube 102. At this time, the connection of the first tube body 1031 and the second tube body 1032 to form the connecting tube 103 can reduce the dimension difference between the snake bone tube 101 and the insertion tube 102, enable the snake bone tube 101 and the insertion tube 102 to be smoothly connected, and make the appearance of the connection part more beautiful.

[0040] It should be noted that in the tube body assembly 10, the snake bone tube 101 is usually inserted into the body. In this article, the term "first end" refers to the end of the first tube body 1031 and the second tube body 1032 that is closer to the snake bone tube 101 along the axis Z direction, and the "second end" refers to the end of the first tube body 1031 and the second tube body 1032 that is farther from the snake bone tube 101 along the axis Z direction.

[0041] In the embodiments of the present invention, when at least the outer diameters of the snake bone tube 101 and the insertion tube 102 are not equal, the first tube body 1031 and the second tube body 1032 are provided. The connecting tube 103 is formed by connecting the first tube body 1031 and the second tube body 1032. Then, the snake bone tube 101 is connected to the first tube body 1031, and the insertion tube 102 is connected to the second tube body 1032. By connecting the first tube body 1031 and the second tube body 1032, the dimensional difference between the snake bone tube 101 and the insertion tube 102 is reduced, enabling a smooth transition at the connection between the snake bone tube 101 and the insertion tube 102, beautifying the appearance of the product. At the same time, the connection between the snake bone tube 101 and the insertion tube 102 is tighter, improving the sealing performance at the connection and optimizing the performance of the product.

[0042] In some embodiments, as Figure 4 and Figure 5 shown, the second end of the first tube body 1031 is inserted into the first end of the second tube body 1032; or the second end of the first tube body 1031 is sleeved outside the first end of the second tube body 1032. It can be understood that when at least the outer diameters of the snake bone tube 101 and the insertion tube 102 are not equal, the connecting tube 103 selects the first tube body 1031 and the second tube body 1032 with different specifications. When the inner diameter of the first tube body 1031 is less than or equal to the outer diameter of the second tube body 1032, the second end of the first tube body 1031 is inserted into the interior of the first end of the second tube body 1032; when the outer diameter of the second tube body 1032 is less than or equal to the inner diameter of the first tube body 1031, the second end of the first tube body 1031 is sleeved outside the first end of the second tube body 1032. After completing the connection and fixation of the first tube body 1031 and the second tube body 1032, the snake bone tube 101 and the insertion tube 102 are then connected together through the first tube body 1031 and the second tube body 1032. By adjusting the connection method according to the radial dimensions of the first tube body 1031 and the second tube body 1032, the flexibility of the structure of the connecting tube 103 is improved.

[0043] The embodiments of the present invention adjust the connection method according to the dimensional relationship between the first tube body 1031 and the second tube body 1032, enabling the connecting tube 103 to be applicable to the connection of pipes with various dimensions, improving the flexibility of the structure of the connecting tube 103, and reducing the assembly difficulty.

[0044] In some embodiments, as Figure 4 and Figure 5 shown, the snake bone tube 101 is sleeved outside the first end of the first tube body 1031, and the insertion tube 102 is inserted into the second end of the second tube body 1032 or the insertion tube 102 is sleeved outside the second end of the second tube body 1032.

[0045] Understandably, when the inner diameter of the snake bone tube 101 is greater than or equal to the outer diameter of the first tube body 1031, the snake bone tube 101 is sleeved outside the first end of the first tube body 1031. In this case, the insertion tube 102 and the second tube body 1032 have at least two connection methods: as Figure 4 shown, when the outer diameter of the insertion tube 102 is less than or equal to the inner diameter of the second tube body 1032, the insertion tube 102 is inserted into the second end of the second tube body 1032 and abuts against the second end of the first tube body 1031 inside the second tube body 1032; as Figure 5 shown, when the inner diameter of the insertion tube 102 is greater than or equal to the outer diameter of the second tube body 1032, the insertion tube 102 is sleeved outside the second end of the second tube body 1032, and the insertion tube 102 abuts against the snake bone tube 101 outside the second tube body 1032.

[0046] It should be noted that the above two connection methods are only examples. According to the actual size requirements, the second end of the first tube body 1031 can be sleeved outside the second tube body 1032 or inserted inside the second tube body 1032, as long as the requirements of the snake bone tube 101 and the insertion tube 102 can be met.

[0047] In some other embodiments, as Figure 6 shown, the snake bone tube 101 is inserted into the first end of the first tube body 1031, and the insertion tube 102 is inserted into the second end of the second tube body 1032 or the insertion tube 102 is sleeved outside the second end of the second tube body 1032.

[0048] Understandably, when the inner diameter of the snake bone tube 101 is less than or equal to the outer diameter of the first tube body 1031, the snake bone tube 101 is inserted into the first end of the first tube body 1031. In this case, the insertion tube 102 and the second tube body 1032 have at least two connection methods: as Figure 6 shown, when the outer diameter of the insertion tube 102 is less than or equal to the inner diameter of the second tube body 1032, the insertion tube 102 is inserted into the second end of the second tube body 1032 and abuts against the snake bone tube 101 inside the second tube body 1032; when the inner diameter of the insertion tube 102 is greater than or equal to the outer diameter of the second tube body 1032, the insertion tube 102 is sleeved outside the second end of the second tube body 1032, and the insertion tube 102 abuts against the first tube body 1031 outside the second tube body 1032.

[0049] It should be noted that the above two connection methods are only examples. According to the actual size requirements, the second end of the first tube body 1031 can be sleeved outside the second tube body 1032 or inserted inside the second tube body 1032, as long as the requirements of the snake bone tube 101 and the insertion tube 102 can be met.

[0050] The embodiments of the present invention provide at least four assembly methods for connecting the connecting pipe 103 to the insertion pipe 102 and the corrugated pipe 101, which can be adjusted according to the actual dimensional relationship between the insertion pipe 102 and the second pipe body 1032, meeting the connection of pipe bodies with various dimensional relationships, improving the flexibility of the connection structure setting, and reducing the assembly difficulty and production cost.

[0051] In some embodiments, a thermoplastic layer is provided on the inner circle and / or outer circle of the insertion pipe 102, and both the corrugated pipe 101 and the connecting pipe 103 are metal pipe fittings. It can be understood that since both the corrugated pipe 101 and the connecting pipe 103 are metal pipe fittings, the corrugated pipe 101 and the connecting pipe 103 can be fixedly connected by welding. A thermoplastic layer is provided on the inner circle and / or outer circle of the insertion pipe 102. When the insertion pipe 102 is inserted into the second end 1302 of the connecting pipe, the connection position is heated, and the thermoplastic layer on the outer circle of the insertion pipe 102 will be fused with the metal connecting pipe 103; when the insertion pipe 102 is sleeved outside the second end 1302 of the connecting pipe, the connection position is heated, and the thermoplastic layer on the inner circle of the insertion pipe 102 will be fused with the metal connecting pipe 103. At the same time, the connecting pipe 103 made of metal has strong ductility, which is convenient for processing the connecting pipe 103 into a thin-walled metal pipe. During the connection process, it will not increase the outer diameter of the connection of the pipe body assembly 10, nor will it affect the inner diameter of the pipe body assembly 10.

[0052] In the embodiments of the present invention, a thermoplastic layer is provided on the inner and / or outer circles of the insertion pipe 102, enabling the connecting pipe 103 and the insertion pipe 102 to be fixedly connected by heating, reducing the complexity of the connection, simplifying the processing steps, and facilitating production and assembly. At the same time, the connecting pipe 103 is a thin-walled metal pipe, reducing the influence of the connecting pipe 103 on the dimensions of the connection of the pipe body assembly 10 and optimizing the performance of the product.

[0053] The embodiments of the present invention also provide an assembly method applied to the assembly of the pipe body assembly 10. The assembly method includes:

[0054] Compare the inner and outer diameter dimensions of the insertion pipe 102 and the corrugated pipe 101 to obtain dimension comparison information;

[0055] Select the connection method between the insertion pipe 102, the corrugated pipe 101, and the connecting pipe 103 according to the dimension comparison information;

[0056] After selecting the connection method and completing the preliminary connection, perform connection processing on the connection and then check the assembly quality.

[0057] Understandably, before connecting the snake bone tube 101 and the insertion tube 102, first compare the dimensional relationship between the insertion tube 102 and the snake bone tube 101, then confirm the structure of the connecting tube 103 and the connection method with the connecting tube 103 based on the information obtained from the dimensional comparison, and perform a preliminary connection. After completing the preliminary connection, perform a connection process on the connection part to tightly connect the snake bone tube 101, the insertion tube 102, and the connecting tube 103. Finally, further inspect the connection part to ensure the reliability of the connection process.

[0058] The assembly method provided by the embodiment of the present invention is based on the dimensional comparison information of the snake bone tube 101 and the insertion tube 102. By selecting a suitable connecting tube 103 and connection method according to the dimensional comparison information, and then performing connection processing and assembly inspection, it is applicable to the connection of snake bone tubes 101 and insertion tubes 102 with various dimensional relationships, effectively reducing production costs and improving the reliability of the product at the same time.

[0059] In some embodiments, according to the dimensional comparison information, when the inner and outer diameters of the insertion tube 102 and the snake bone tube 101 are equal, insert the first end 1301 of the connecting tube into the snake bone tube 101 or sleeve it outside the snake bone tube 101; insert the second end 1302 of the connecting tube into the insertion tube 102 or sleeve it outside the insertion tube 102; when at least the outer diameters of the insertion tube 102 and the snake bone tube 101 are not equal, set the connecting tube 103 to include a first tube body 1031 and a second tube body 1032 with different inner diameters, and according to the dimensional matching degree, insert the second end of the first tube body 1031 into the first end of the second tube body 1032 or sleeve the second end of the first tube body 1031 outside the first end of the second tube body 1032; and insert the first end of the first tube body 1031 into the snake bone tube 101 or sleeve it outside the snake bone tube 101, and insert the second end of the second tube body 1032 into the insertion tube 102 or sleeve it outside the insertion tube 102.

[0060] Understandably, according to the dimensional comparison information, when the inner and outer diameters of the insertion tube 102 and the snake bone tube 101 are equal, a single pipe is selected for the connecting tube 103, and there are the following two connection methods between the snake bone tube 101, the insertion tube 102, and the connecting tube 103:

[0061] The first connection method: The insertion tube 102 and the snake bone tube 101 are simultaneously sleeved outside the connecting tube 103;

[0062] The second connection method: The insertion tube 102 and the snake bone tube 101 are simultaneously inserted into the connecting tube 103.

[0063] When at least the outer diameters of the insertion tube 102 and the snake bone tube 101 are not equal, the connecting tube 103 is set to include a first tube body 1031 and a second tube body 1032 with different inner diameters, and there are the following eight connection methods between the snake bone tube 101, the insertion tube 102, and the connecting tube 103:

[0064] The first connection method: The second end of the first pipe body 1031 is inserted into the first end of the second pipe body 1032, the snake bone pipe 101 is sleeved outside the first end of the first pipe body 1031, and the insertion pipe 102 is sleeved outside the second end of the second pipe body 1032;

[0065] The second connection method: The second end of the first pipe body 1031 is inserted into the first end of the second pipe body 1032, the snake bone pipe 101 is sleeved outside the first end of the first pipe body 1031, and the insertion pipe 102 is inserted into the second end of the second pipe body 1032;

[0066] The third connection method: The second end of the first pipe body 1031 is inserted into the first end of the second pipe body 1032, the snake bone pipe 101 is inserted into the first end of the first pipe body 1031, and the insertion pipe 102 is sleeved outside the second end of the second pipe body 1032;

[0067] The fourth connection method: The second end of the first pipe body 1031 is inserted into the first end of the second pipe body 1032, the snake bone pipe 101 is inserted into the first end of the first pipe body 1031, and the insertion pipe 102 is inserted into the second end of the second pipe body 1032;

[0068] The fifth connection method: The second end of the first pipe body 1031 is sleeved outside the first end of the second pipe body 1032, the snake bone pipe 101 is sleeved outside the first end of the first pipe body 1031, and the insertion pipe 102 is sleeved outside the second end of the second pipe body 1032;

[0069] The sixth connection method: The second end of the first pipe body 1031 is sleeved outside the first end of the second pipe body 1032, the snake bone pipe 101 is sleeved outside the first end of the first pipe body 1031, and the insertion pipe 102 is inserted into the second end of the second pipe body 1032;

[0070] The seventh connection method: The second end of the first pipe body 1031 is sleeved outside the first end of the second pipe body 1032, the snake bone pipe 101 is inserted into the first end of the first pipe body 1031, and the insertion pipe 102 is sleeved outside the second end of the second pipe body 1032;

[0071] The eighth connection method: The second end of the first pipe body 1031 is sleeved outside the first end of the second pipe body 1032, the snake bone pipe 101 is inserted into the first end of the first pipe body 1031, and the insertion pipe 102 is inserted into the second end of the second pipe body 1032.

[0072] In the embodiments of the present invention, the structure of the connecting pipe 103 is confirmed according to the dimensional information of the insertion pipe 102 and the snake bone pipe 101. At the same time, the connection method is further confirmed according to the dimensional comparison information between the connecting pipe 103 and the insertion pipe 102 and the snake bone pipe 101, so as to achieve a tight connection between the insertion pipe 102 and the snake bone pipe 101 with various dimensional relationships, ensure the reliability of the connection between the insertion pipe 102 and the snake bone pipe 101, improve the flexibility of the setting of the connecting pipe 103, and reduce the production and assembly costs.

[0073] In some embodiments, the preliminary connection includes determining the coaxiality and the overlapping length of each connection part through a jig. It can be understood that when connecting the snake bone pipe 101 and the insertion pipe 102, the coaxiality must be ensured first, so that the internal channel of the pipe body assembly 10 is smooth, and instruments, liquids, etc. can be smoothly transported along the pipe body assembly 10 to the target position. At the same time, since the specifications of the connecting pipe 103 need to be determined according to the dimensional relationship between the snake bone pipe 101 and the insertion pipe 102, the insertion or sleeving distance of the pipes also needs to be determined according to the specifications of the pipes when connecting, so as to ensure a tight connection between the snake bone pipe 101 and the insertion pipe 102 without affecting the normal operation of the pipe body assembly 10.

[0074] The connection treatment of the connection part includes the first connection treatment between the insertion pipe 102 and the connecting pipe 103, and the second connection treatment between the snake bone pipe 101 and the connecting pipe 103. Specifically, the first connection treatment refers to heating the connection part of the insertion pipe 102 and the connecting pipe 103 to a specified temperature range, so that the thermoplastic layer on the insertion pipe 102 is fused with the metal connecting pipe 103; the second connection treatment refers to connecting the snake bone pipe 101 and the connecting pipe 103 by welding, and the welding here includes but is not limited to laser electric welding, resistance spot welding, and soldering connection, etc.

[0075] In the embodiments of the present invention, the connection position is preliminarily determined through a jig, which improves the accuracy of the connection between the snake bone pipe 101 and the insertion pipe 102 and the connecting pipe 103. At the same time, different treatments are carried out according to the different materials of the pipe body, which improves the reliability of the connection between the snake bone pipe 101 and the insertion pipe 102, thereby improving the quality of the connection part of the pipe body assembly 10.

[0076] In some embodiments, the inspection of the assembly quality includes at least checking at least one of the coaxiality, airtightness, and appearance between the insertion pipe 102 and the connecting pipe 103 after the connection between the insertion pipe 102 and the connecting pipe 103 is completed. It can be understood that the insertion pipe 102 and the connecting pipe 103 are connected together by heating. After the connection is completed, the assembly quality of the connection part needs to be detected, such as coaxiality, airtightness, and appearance, etc., to ensure the quality of the connection between the insertion pipe 102 and the connecting pipe 103.

[0077] In the embodiment of the present invention, by performing quality inspection on the connection between the insertion tube 102 and the connection tube 103, it is possible to prevent defective products from being produced due to poor connection between the insertion tube 102 and the connection tube 103, and further ensure the quality of the product.

[0078] As Figure 7 shown, the embodiment of the present invention also provides an endoscope 1, which includes a tube body assembly 10, a distal end assembly 20, and a handle portion 30. The tube body assembly 10 is assembled by the assembly method described in any of the above embodiments. The distal end assembly 20 is inserted into one end of the tube body assembly 10 near the snake bone tube 101 (see Figure 1 ), and the handle portion 30 is connected to the other end of the tube body assembly 10 and at least controls the operation of the distal end assembly 20.

[0079] It can be understood that the distal end assembly 20 is inserted into one end of the tube body assembly 10, the other end of the tube body assembly 10 is connected to the handle portion 30, the distal end assembly 20 extends inside the tube body assembly 10 to the handle portion 30, and the handle portion 30 controls the working state of the distal end assembly 20. Under the operation of the handle portion 30, the tube body assembly 10 pushes the distal end assembly 20 to move to the target position and perform inspections and surgeries at the target position. The snake bone tube 101 in the tube body assembly 10 can be flexibly bent in the body, enabling the distal end assembly 20 to smoothly reach the target position.

[0080] In the embodiment of the present invention, the distal end assembly 20 extends inside the tube body assembly 10 to the handle portion 30. By only operating the handle portion 30, the working state of the distal end assembly 20 can be controlled, which simplifies the structure, facilitates operation, and optimizes the user experience. Moreover, the tube body assembly 10 in the endoscope 1 can adjust the connection relationship between the connection tube 103 and the snake bone tube 101 and the insertion tube 102 according to the diameter size relationship between the snake bone tube 101 and the insertion tube 102, realizes the connection of the snake bone tube 101 and the insertion tube 102 with different size relationships, simplifies the connection method of the snake bone tube 101 and the insertion tube 102, and reduces the production cost.

[0081] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tube assembly, applied to an endoscope, characterized in that The tube assembly includes: A snake bone tube, at least used to guide the direction of the insertion movement; An insertion tube, used to push the snake bone tube to move; A connecting tube, having opposite first and second ends along the axial direction; Wherein, the first end of the connecting tube is connected to the snake bone tube, and the second end of the connecting tube is connected to the insertion tube.

2. The tube body assembly according to claim 1, wherein The inner and outer diameters of the snake bone tube and the insertion tube are correspondingly equal; wherein, the first end of the connecting tube is inserted into the snake bone tube, and the second end of the connecting tube is inserted into the insertion tube; or the first end of the connecting tube is sleeved outside the snake bone tube, and the second end of the connecting tube is sleeved outside the insertion tube.

3. The tube body assembly according to claim 1, characterized in that, At least the outer diameters of the snake bone tube and the insertion tube are not equal; wherein, the connecting tube includes a first tube body and a second tube body, the second end of the first tube body is connected to the first end of the second tube body, the snake bone tube is connected to the first end of the first tube body, and the insertion tube is connected to the second end of the second tube body.

4. The tubular component according to claim 3, characterized in that The second end of the first tube body is inserted into the first end of the second tube body; or the second end of the first tube body is sleeved outside the first end of the second tube body.

5. The tubular component according to claim 3, characterized in that, The snake bone tube is sleeved outside the first end of the first tube body; the insertion tube is inserted into the second end of the second tube body or the insertion tube is sleeved outside the second end of the second tube body.

6. The tubular component according to claim 3, characterized in that The snake bone tube is inserted into the first end of the first tube body; the insertion tube is inserted into the second end of the second tube body or the insertion tube is sleeved outside the second end of the second tube body.

7. The tubular component according to any one of claims 1-6, characterized in that, A thermoplastic layer is provided on the inner and / or outer circle of the insertion tube, and both the snake bone tube and the connecting tube are metal pipe fittings.

8. An assembly method, applied to the assembly of the pipe body component according to any one of claims 1-7, characterized in that, The assembly method includes: Comparing the inner and outer diameter sizes of the insertion tube and the snake bone tube to obtain size comparison information; Selecting the connection method between the insertion tube, the snake bone tube and the connecting tube according to the size comparison information; After selecting the connection method and completing the preliminary connection, perform connection processing on the connection points and then check the assembly quality.

9. The assembly method according to claim 8, wherein, According to the size comparison information, when the inner and outer diameter sizes of the insertion tube and the snake bone tube are equal, insert the first end of the connecting tube into the snake bone tube or sleeve it outside the snake bone tube; insert the second end of the connecting tube into the insertion tube or sleeve it outside the insertion tube; When at least the outer diameters of the insertion tube and the snake bone tube are not equal, set the connecting tube to include a first tube body and a second tube body with different inner diameters, and according to the size matching degree, insert the second end of the first tube body into the first end of the second tube body or sleeve the second end of the first tube body outside the first end of the second tube body; and insert the first end of the first tube body into the snake bone tube or sleeve it outside the snake bone tube, and insert the second end of the second tube body into the insertion tube or sleeve it outside the insertion tube.

10. The assembly method according to claim 8, characterized in that, The preliminary connection includes determining the coaxiality and the overlapping length of each connection point through a jig; the connection processing of the connection points includes performing a first connection processing between the insertion tube and the connecting tube, and performing a second connection processing between the snake bone tube and the connecting tube.

11. The assembly method according to claim 8, characterized in that, The inspection of the assembly quality at least includes inspecting at least one of the coaxiality, airtightness, and appearance between the insertion tube and the connection tube after the connection between the insertion tube and the connection tube is completed.

12. An endoscope, characterized in that, Comprising: The tube body assembly according to any one of claims 1-7, wherein the tube body assembly is assembled by the assembly method according to any one of claims 8-11; A tip assembly inserted at one end of the tube body assembly close to the snake bone tube; A handle portion connected to the other end of the tube body assembly and at least controlling the operation of the tip assembly.

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