Electronic endoscope bending mechanism

Abstract

The electronic endoscope bending mechanism comprises a snake bone, a control end and a traction rope, the snake bone comprises a tail section, a capillary tube and a hose are arranged between the tail section and the control end, one end of the hose is connected with the control end, the other end of the hose is connected with the tail section, one end of the capillary tube is connected with the interior of the tail section, and the other end of the capillary tube penetrates through the hose. The head end of the traction rope is connected with the control end, and the tail end of the traction rope penetrates through the capillary tube to enter the snake bone. Compared with the prior art, the bending mechanism can effectively prevent the snake bone from steering and prevent the rope from being wound, the minimum space of the pressing groove part can be ensured to meet the requirement, the pipeline can be arranged by avoiding the pressing groove left and right, the length of the endoscope entering a human body can be increased, and the outer diameter of the snake bone cannot be increased; and the operation space in the snake bone cannot be reduced, and the unsmoothness of the woven net pipe entering the body is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electronic endoscope technical field, especially related to a kind of electronic endoscope bending mechanism. BACKGROUND

[0002] Electronic endoscope includes bending mechanism, bending mechanism includes snake bone and the pulling rope that is fixed in its distal end and is inserted into it, the first end of pulling rope is connected with control end, and the tail end of pulling rope is connected with the first section of snake bone. When using, by the control end control pulling rope, snake bone can be bent, so as to drive the head end of snake bone to turn, to change the head end observation angle, realize more clear and accurate observation effect.

[0003] In prior art, the limiting ring arranged symmetrically in snake bone (the first section, intermediate section, tail section) is used to limit and fix pulling rope, and this design can effectively realize snake bone turning control. Limiting ring arranged in the first section and intermediate section of snake bone can effectively control snake bone turning and prevent rope winding.

[0004] However, the snake bone of the above design has the following problems in use: the rope between tail section and control end will be wound in use, and the limiting ring arranged symmetrically occupies more space inside snake bone, thus affecting the pipeline passing through inside it. UTILITY MODEL CONTENT

[0005] The utility model discloses electronic endoscope bending mechanism, which can effectively control snake bone turning and prevent rope winding, and also can increase the length of endoscope entering human body.

[0006] Technical scheme: in order to achieve the above object, the utility model adopts the following technical scheme:

[0007] A kind of electronic endoscope bending mechanism, including snake bone, control end and pulling rope, the snake bone includes tail section, and the tail section and control end are provided with capillary and hose between, one end of hose is connected with control end, and the other end is connected with tail section;One end of capillary is connected inside tail section, and the other end passes through hose, and is connected to the inside of control end, the first end of pulling rope is connected with control end, and the tail end passes through capillary and enters snake bone.

[0008] Preferably, the end of the tail section is provided with a compression cut along the length direction of the tail section, and the tail section forms a compression segment at the compression cut part, and the other part is a main body segment, the outer diameter of the main body segment is greater than the outer diameter of the compression segment.

[0009] The hose is connected with the tail section by sleeving on the compression segment.

[0010] Preferably, the compression section outer diameter and the hose inner diameter are adapted, the body section outer diameter is greater than the hose inner diameter, and the body section outer diameter is the same as the hose outer diameter.

[0011] Preferably, the end section body section is provided with an observation hole, the end of the capillary tube extends into the end section body section and beyond the observation hole, and the end of the capillary tube is ultrasonically welded in the end section body section.

[0012] Preferably, the compression cut is symmetrically provided with two.

[0013] Preferably, the snake bone is provided with a fixed pressing groove recessed inward on the cylinder wall, the fixed pressing groove is open at both ends along the axial direction of the snake bone, the inside of the fixed pressing groove is in communication with the inside of the snake bone, and the fixed pressing groove is alternately arranged on the left and right sides of the cylinder wall of the snake bone along the axial direction of the snake bone.

[0014] Preferably, the control end comprises a handle shell, the handle shell comprises an upper shell and a lower shell, the surface of the upper shell or the lower shell is provided with a fixed groove, and the capillary tube is installed in the fixed groove.

[0015] Preferably, the capillary tube and the end section are connected by ultrasonic welding, the capillary tube is a metal ductile capillary tube, and the hose is a woven mesh tube.

[0016] Preferably, the snake bone comprises a head section, a front section, a middle section, a rear section and an end section connected in sequence.

[0017] The front section, the middle section and the rear section are all bendable sections, the bending angle of the front section and the middle section is greater than that of the rear section, the front section, the middle section and the rear section each comprise a plurality of identical movable sections, one end of each movable section is provided with a C-shaped arm, the other end is provided with a C-shaped groove, each movable section is connected by being installed in the C-shaped groove through the C-shaped arm, and each section is bent by rotation of the C-shaped arm in the C-shaped groove.

[0018] Preferably, the movable section is provided with a fixed pressing groove recessed inward on the cylinder wall, the fixed pressing groove is open at both ends along the axial direction of the movable section, the inside of the fixed pressing groove is in communication with the inside of the movable section, and the fixed pressing groove is alternately arranged on the left and right sides of the cylinder wall of the snake bone along the axial direction of the snake bone.

[0019] As a further scheme:

[0020] In the front section, the inclination angle of the connecting platform of adjacent movable sections is 8.5°±2°, the length of the movable section is 2.2±0.2mm, and the number of nodes is 16±4.

[0021] In the middle section, the inclination angle of the connecting platform of adjacent movable sections is 7.5°±1°, the length of the movable section is 2.5±0.2mm, and the number of nodes is 4±2.

[0022] In the rear section, the inclination angle of the connecting platform of the adjacent movable section is 5°±1°, the length of the movable section is 3.2±0.2mm, and the number of nodes is 4±2.

[0023] Two C-shaped arms are symmetrically arranged at one end of the movable section, and two C-shaped grooves are symmetrically arranged at the other end of the movable section.

[0024] The end of the movable section is located on the two sides of the C-shaped arm to form a first platform, and the end of the movable section is located on the two sides of the C-shaped groove to form a second platform.

[0025] As a further scheme:

[0026] The height of the first platform is between the top height and the bottom height of the C-shaped arm, and the height of the second platform is between the top height and the bottom height of the C-shaped groove.

[0027] As a preferred scheme:

[0028] In the front section, the inclination angle of the first platform and the second platform is 8.5°±2°, the distance between the center of the C-shaped arm and the center of the C-shaped groove is 2.2±0.2mm, and the number of nodes of the movable section is 16±4.

[0029] In the middle section, the inclination angle of the first platform and the second platform is 7.5°±1°, the distance between the center of the C-shaped arm and the center of the C-shaped groove is 2.5±0.2mm, and the number of nodes of the movable section is 4±2.

[0030] In the rear section, the inclination angle of the first platform and the second platform is 5°±1°, the distance between the center of the C-shaped arm and the center of the C-shaped groove is 3.2±0.2mm, and the number of nodes of the movable section is 4±2.

[0031] As a further scheme, the connection of the first section and the front section, and the connection of the rear section and the last section, are all connected by installing the C-shaped arm in the C-shaped groove; one end of the connection of the first section and the front section, and one end of the connection of the last section and the rear section, are all arranged in the same structure as the end of the movable section.

[0032] Advantages: compared with the prior art, the snake bone structure has the following advantages:

[0033] 1. In the bending mechanism, the control rope is drawn out from the control end and passes through the capillary tube into the snake bone after passing through the capillary tube connected to the last section, which can effectively prevent the snake bone from turning and prevent the rope from winding, and the metal ductility capillary tube will not bend and knot.

[0034] 2. In the bending mechanism, the fixed pressure grooves arranged alternately on the snake bone can ensure that the minimum space of the pressure groove part can meet the demand, and the pipeline can avoid the pressure groove arrangement left and right.

[0035] 3. The bending mechanism, by connecting the hose between the end segment and the control end, can increase the length of the endoscope entering the human body, and by setting the compression segment in the end segment, the hose is connected, which does not increase the outer diameter of the snake bone and does not reduce the operation space in the snake bone, and reduces the incoordination of the net tube entering the body.

[0036] 4. In the snake bone structure, each movable segment can rotate freely in multiple directions through the connection mode of the C-shaped arm and the C-shaped groove, so that complex multi-directional bending is realized; the bending angles of the front segment and the middle segment are greater than that of the rear segment, and the segmented design makes the front end more flexible and can better perform fine operation, and the rear segment provides certain rigidity to ensure the stability of the whole.

[0037] 5. In the snake bone structure, the front segment, the middle segment and the rear segment each include a plurality of movable segments with the same structure, which is simple in structure and only one steel pipe is needed for production, without the need of customizing steel pipes of unusual specifications; the modular design enables each movable segment to be independently produced and tested, and the modular design makes the assembly process more simple and improves the production efficiency; if a movable segment is damaged, it can be replaced individually without the need of replacing the entire segment, thereby reducing the maintenance cost.

[0038] 6. In the snake bone structure, one end of the movable segment is provided with a C-shaped arm, and the other end is provided with a C-shaped groove, which is a simple and reliable connection mode, and only the C-shaped arm needs to be inserted into the C-shaped groove to complete the connection, which not only reduces the assembly steps, but also reduces the assembly difficulty; the connection mode of the C-shaped arm and the C-shaped groove enables the connection between the movable segments to be very fast, and the entire snake bone structure can be quickly completed. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 It is a structure schematic view of the bending mechanism of the utility model (the snake bone and the control end are divided, and there is no hose state).

[0040] Figure 2 It is a structure schematic view of the bending mechanism of the utility model (the snake bone and the control end are divided, and there is a hose state).

[0041] Figure 3 It is a structure schematic view of the snake bone in the bending mechanism of the utility model.

[0042] Figure 4 It is a structure schematic view of the movable segment in the snake bone in the bending mechanism of the utility model.

[0043] Figure 5 It is a connection state view of two adjacent movable segments in the snake bone in the bending mechanism of the utility model. DETAILED DESCRIPTION

[0044] The utility model will be further described below with reference to the drawings.

[0045] In the description of the utility model, it needs to understand that, the orientation or position relation indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientation or position relation shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model indicated or implied by the device or element must have a particular orientation, a particular orientation and operation, therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" and the like can be explicitly or implicitly included one or more features. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0046] Embodiment 1

[0047] An electronic endoscope bending mechanism, as shown in Figure 1 and Figure 2 , comprising a snake bone 1, a control end 2 and a pulling rope, the snake bone 1 comprises a terminal segment 105, a capillary tube 3 and a hose 4 are arranged between the terminal segment 105 and the control end 2, one end of the hose 4 is connected with the control end 2, and the other end is connected with the terminal segment 105, one end of the capillary tube 3 is connected inside the terminal segment 105, and the other end passes through the hose 4 and is connected to the inside of the control end 2, and the first end of the pulling rope is connected with the control end 2, and the tail end passes through the capillary tube 3 and is connected in the snake bone 1.

[0048] When the operator applies force to the control end 2 during use, the force is transmitted to the pulling rope, which pulls or relaxes the pulling rope, thereby controlling the shape and direction of the snake bone 1. One end of the capillary tube 3 of the application is connected to the inside of the terminal segment 105, and the other end passes through the hose 4 and is connected to the inside of the control end 2. The capillary tube 3 not only provides a channel for the pulling rope, but also plays a guiding role, ensuring that the rope between the terminal segment of the snake bone and the control end can move along the predetermined path without winding. The arrangement of the capillary tube 3 of the application can effectively prevent the control of the snake bone turning and prevent the rope from winding.

[0049] The end of the terminal segment 105 is provided with a compression cut 1051 along the length direction of the terminal segment 105, and the part of the terminal segment 105 located in the compression cut 1051 forms a compression segment, and the other segments are main body segments, and the outer diameter of the main body segment is greater than that of the compression segment. The purpose of designing the compression cut 1051 is to form a compression segment to prevent the overall size of the terminal segment 105 from being reduced when the terminal segment 105 is compressed by a compression tool. Preferably, the compression cut 1051 is symmetrically provided with two.

[0050] In a conventional design, a connecting piece is arranged between the tail section and the main hose, and the connecting piece connects the tail section and the main hose in a sleeve type or an embedded type. The sleeve type connection mode has a problem of increasing the outer diameter, and the embedded type connection mode also has a problem of reducing the internal space, thereby reducing the operation space. Therefore, it is difficult to design the tail section and the main hose without increasing the outer diameter of the snake and without reducing the operation space in the snake.

[0051] The hose 4 of the present application is connected with the tail section 105 by sleeving on the compression section. Specifically, the hose 4 and the compression section of the tail section 105 are connected in a glue joint mode, instead of the conventional connection mode through a connecting piece. The outer diameter of the compression section and the inner diameter of the hose 4 are matched, and the outer diameter of the main body section is greater than the inner diameter of the hose 4. This design can prevent the snake from being pulled into the hose 4 by a large pulling force of the pulling rope when the snake is used, avoid the snake 1 from being retracted into the hose 4, and ensure the safety of the use of the endoscope. Further, the outer diameter of the main body section is as same as the outer diameter of the hose 4 as far as possible, which can reduce the incoordination of the hose 4 into the body. In the embodiment, the hose 4 is selected as a woven mesh tube. The woven mesh tube has a steel wire inside, has a certain toughness, can have a good supporting effect, and can have a certain deformation ability.

[0052] The main body section of the tail section 105 is provided with an observation hole 1052. When the capillary tube is installed, the observation hole 1052 is used to observe whether the capillary tube is connected in place. When the capillary tube 3 is installed, the end of the capillary tube 3 is inserted into the main body section of the tail section 105 and passes through the observation hole 1052. When the end of the capillary tube 3 passes through the observation hole 1052, the end of the capillary tube 3 is located on the left side of the observation hole 1052 in the direction of the arrow, which can ensure the effective welding of the capillary tube 3 and the tail section 105. The end of the capillary tube 3 is ultrasonically welded in the main body section of the tail section 105. The ultrasonic welding can improve the welding efficiency, and the capillary tube 3 is made of a metal tough capillary tube and will not be bent and knotted. Figure 1 and Figure 2 The end of the capillary tube 3 is ultrasonically welded in the main body section of the tail section 105. The ultrasonic welding can improve the welding efficiency, and the capillary tube 3 is made of a metal tough capillary tube and will not be bent and knotted.

[0053] The control end 2 is a handle structure, which includes a handle shell 201. The handle shell 201 includes an upper shell and a lower shell. The upper shell or the lower shell is provided with a fixing groove 2011. The capillary tube 3 is installed in the fixing groove 2011.

[0054] Embodiment 2

[0055] The present embodiment has the same inventive concept as the embodiment 1, and further expands the embodiment 1.

[0056] As Figure 3 , Figure 4 and Figure 5As shown, the snake skeleton 1 includes a first segment 101, a front segment 102, a middle segment 103, a rear segment 104, and a last segment 105 connected in sequence. The front segment 102, the middle segment 103, and the rear segment 104 are all bendable segments, and the bending angle of the front segment 102 and the middle segment 103 is greater than that of the rear segment 104. The front segment 102, the middle segment 103, and the rear segment 104 each include several movable segments 106 with the same structure. One end of the movable segment 106 is provided with a C-shaped arm 1061, and the other end is provided with a C-shaped groove 1062. Each movable segment 106 is connected to the other by the C-shaped arm 1061 installed in the C-shaped groove 1062. Each segment bends by the rotation of the movable segment 106 C-shaped arm 1061 in the C-shaped groove 1062.

[0057] In this application, the identical structure of the movable section 106 in the front section 102, middle section 103, and rear section 104 refers only to its shape and does not include dimensional data. The structure refers to the C-shaped arm 1061 at one end of the movable section 106 and the C-shaped groove 1062 at the other end. Dimensional data includes the distance between the centers of the C-shaped arm 1061 and the C-shaped groove 1062, as well as other assembly data such as the cutting angle α.

[0058] In this application, the bending angles of the front section 102 and the middle section 103 are greater than the bending angle of the rear section 104. Specifically, in one embodiment, the bending angle of the front section 102 is greater than the bending angle of the middle section 103, and the bending angle of the middle section 103 is greater than the bending angle of the rear section 104. In another embodiment, the bending angle of the front section 102 is equal to the bending angle of the middle section 103, and the bending angles of the front section 102 and the middle section 103 are greater than the bending angle of the rear section 104.

[0059] In use, the first section 101 connects to the front end piece, and the last section 105 connects to the control component. The rotation of the front section 102, middle section 103, and rear section 104 can adapt to the movement of the control component, thereby driving the front end piece to move. This operation is a routine operation of an endoscope and will not be further described in this application. This application uses a design with several structurally identical movable sections 106, which is simple in structure and easy to assemble and replace. The bending angle of the front section 102 and middle section 103 is greater than that of the rear section 104. This segmented design makes the front end more flexible and allows for better precision operation.

[0060] like Figure 2 As shown, one end of the movable section 106 is provided with a C-shaped arm 1061, and the other end is provided with a C-shaped groove 1062. The movable sections 106 and the segments are connected to each other via the C-shaped arms 1061 mounted in the C-shaped grooves 1062 (e.g., ...). Figure 3As shown in the figure, each segment is bent by rotation of the C-shaped arm 1061 in the C-shaped groove 1062. As a preferred solution, two C-shaped arms 1061 are symmetrically arranged at one end of the movable joint 106, and two C-shaped grooves 1062 are symmetrically arranged at the other end of the movable joint 106, that is, the line connecting the centers of the two C-shaped arms 1061 passes through the axis of the movable joint 106, and similarly, the line connecting the centers of the two C-shaped grooves 1062 also passes through the axis of the movable joint 106, and the positions correspond to those of the two C-shaped arms 1061. As designed above, the connection of the movable joint is more secure, and the rotation is more stable.

[0061] As a more specific design, the end of the movable joint 106, located on both sides of the C-shaped arm 1061, forms a first table surface 1063, and the end of the movable joint 106, located on both sides of the C-shaped groove 1062, forms a second table surface 1064. Both the first table surface 1063 and the second table surface 1064 are inclined surfaces, both inclined towards the middle of the movable joint 106, and the inclination angles are the same. The height of the first table surface 1063 is between the top height and the bottom height of the C-shaped arm 1061; the height of the second table surface 1064 is between the top height and the bottom height of the C-shaped groove 1062. The side wall of the movable joint 106 is provided with a fixed pressing groove 1065 recessed towards the inside of the movable joint 106. Along the axial direction of the movable joint 106, the fixed pressing groove 1065 is open at both ends, so that the inside of the fixed pressing groove 1065 is in communication with the inside of the movable joint 106. Preferably, along the axial direction of the snake bone 1, the fixed pressing grooves 1065 are alternately arranged on the left and right sides of the cylinder wall of the snake bone 1, which can ensure that the minimum space of the pressing groove part can meet the demand, and the pipeline can avoid the pressing groove arrangement on the left and right sides.

[0062] The leading end of the pulling rope is connected to the control mechanism on the control end 2, and the trailing end passes through the capillary tube 3 into the snake bone 1, enters the last segment 105 of the snake bone, then passes through the fixed pressing grooves 1065 of the movable joints 106 on each segment of the snake bone 1, reaches the first segment 101 of the snake bone 1, and is welded and connected with the first segment 101. Two pulling ropes are symmetrically arranged, and therefore two capillary tubes 3 are symmetrically arranged. During operation, the pulling rope is pulled by the control mechanism to move, thereby realizing the movement of the first segment 101 of the snake bone.

[0063] As a more preferred design:

[0064] In the front segment 102, the inclination angle α of the first table surface 1063 and the second table surface 1064 is 8.5°±2°, the distance a between the center of the C-shaped arm 1061 and the center of the C-shaped groove 1062 is 2.2±0.2mm, and the number of segments of the movable joint 106 is 16±4;

[0065] In the middle segment 103, the inclination angle α of the first table surface 1063 and the second table surface 1064 is 7.5°±1°, the distance a between the center of the C-shaped arm 1061 and the center of the C-shaped groove 1062 is 2.5±0.2mm, and the number of segments of the movable joint 106 is 4±2.

[0066] In the posterior segment 104, the angle of inclination a of the first and second platforms 1063, 1064 is 5°±1°, the distance a between the center of the C-shaped arm 1061 and the center of the C-shaped groove 1062 is 3.2±0.2 mm, and the number of the active segments 106 is 4±2.

[0067] It should be noted that in the snake bone structure, the bending angle of the active segment 106 is affected by the cutting angle (inclination angle), the greater the inclination angle, the greater the bending angle. In addition, the bending angle is also related to the number of active segments and the distance a of the center. As in the previous segment 2, the inclination angle a is 10°, the distance a is 2.1 mm, and the number of active segments is 18, which can make the bending angle of the snake bone anterior segment exceed 360°. That is, the bending range of the snake bone anterior segment is 0-360°. The present application better integrates the bending performance, rigidity and stability of the snake bone through the above specific inclination angle design, so that the snake bone has good bending performance while improving the rigidity and stability of the snake bone. Specifically, the larger cutting angle of the anterior segment and the shorter distance a enable the anterior segment to achieve a smaller bending radius, thereby providing highly flexible steering capability at the front end. The medium cutting angle and medium length of the middle segment ensure that the middle segment can still achieve a medium degree of bending while maintaining a certain rigidity and support force, supporting more complex movements of the front end. The smaller cutting angle and longer distance of the posterior segment enhance the structural strength of the posterior segment, while allowing slight angle adjustment to provide necessary support for the entire device.

[0068] As in one embodiment, the inclination angle a of the first and second platforms 1063, 1064 of the anterior segment 102 is 10°, the inclination angle a of the first and second platforms 1063, 1064 of the middle segment 103 is 8°, and the inclination angle a of the first and second platforms 1063, 1064 of the posterior segment 104 is 5°. In this design, the bending angles of the anterior segment 102, the middle segment 103, and the posterior segment 104 decrease in turn.

[0069] As in another embodiment, the inclination angle a of the first and second platforms 1063, 1064 of the anterior segment 102 is 8°, the inclination angle a of the first and second platforms 1063, 1064 of the middle segment 103 is 8°, and the inclination angle a of the posterior segment 104 is 5°. In this design, the bending angles of the anterior segment 102 and the middle segment 103 are the same and greater than the bending angle of the posterior segment 104.

[0070] In some embodiments, the inclination angles a of the first and second table surfaces 1063 and 1064 of each movable section 106 in the front section 102 are the same, the inclination angles a of the first and second table surfaces 1063 and 1064 of each movable section 106 in the middle section 103 are the same, and the inclination angles a of the first and second table surfaces 1063 and 1064 of each movable section 106 in the rear section 104 are the same. In other embodiments, the inclination angles a of the first and second table surfaces 1063 and 1064 of each movable section 106 in the front section 102 are gradually reduced, the inclination angles a of the first and second table surfaces 1063 and 1064 of each movable section 106 in the middle section 103 are gradually reduced, and the inclination angles a of the first and second table surfaces 1063 and 1064 of each movable section 106 in the rear section 104 are gradually reduced. For example, the inclination angles a of the first and second table surfaces 1063 and 1064 of the first movable section 106 in the front section 102 are 10.5°, the inclination angles a of the first and second table surfaces 1063 and 1064 of the last movable section 106 are 8°, and the inclination angles a of the first and second table surfaces 1063 and 1064 of the first movable section 106 in the middle section 103 cannot be greater than 8°.

[0071] In the present embodiment, the connection between the first section 101 and the front section 102, and the connection between the rear section 104 and the last section 105 are also connected by C-shaped arms installed in C-shaped grooves. The end of the first section 101 connected to the front section 102 and the end of the last section 105 connected to the rear section 104 are both configured in the same structure as the end of the movable section 106, which can be configured as a C-shaped groove structure or a C-shaped arm structure.

[0072] In one embodiment, the first section 101, the front section 102, the middle section 103, the rear section 104, and the last section 105 are all cylindrical structures, and the diameters of the cylinders are the same.

[0073] The endoscope snake structure of the present application does not need to be customized with uncommonly sized steel pipes, has good adaptability, can save assembly size, can freely adjust the bending angle and the size of the circular arc of the snake, and is suitable for different parts of the examination and treatment requirements.

[0074] The specific design principles of the above-mentioned electronic endoscope snake structure are as follows:

[0075] 1. Design explanation of the first section of the snake: The first section of the snake 101 is connected to the front end piece of the electronic endoscope.

[0076] 2. Design explanation of the front section of the snake: When the product enters the body, the bending radius is small, and the design of the C-shaped groove and the C-shaped arm avoids compression of the internal instrument cavity. It provides rigidity and support while having a large angle bending effect. The front section 102 needs to be flexibly turned and bent at the front end, so each movable section 106 needs to have a larger cutting angle a and a shorter length a, such as Figure 2The angle a is 8.5°±2°, and the length a is 2.2±0.2mm. The number of the movable segments 106 in the front segment is selected according to the product and the length as needed, and the number of the segments is 16±4. The fixed pressure grooves 1065 are alternated left and right instead of being symmetrical, because the internal space of the snake bone is limited, and the internal minimum space needs to be controlled. The left and right alternating pressure grooves can ensure that the minimum space of the pressure groove part can also meet the demand, and the pipeline can avoid the pressure groove arrangement left and right.

[0077] 3. Design of the middle segment of the snake bone: provide rigidity and support force while having a medium angle bending effect. The middle segment 103 needs to perform a medium angle turning bend at the middle end, and support the large angle flexible bending of the front end, so each movable segment 106 needs to have a medium cutting angle a and a medium length a, such as Figure 2 The angle a is 7.5°±1°, and the length a is 2.5±0.2mm. The number of the movable segments 106 in the front segment is selected according to the product and the length as needed, and the number of the segments is 4±2. The fixed pressure grooves 1065 are alternated left and right instead of being symmetrical, because the internal space of the snake bone is limited, and the internal minimum space needs to be controlled. The left and right alternating pressure grooves can ensure that the minimum space of the pressure groove part can also meet the demand, and the pipeline can avoid the pressure groove arrangement left and right.

[0078] 4. Design of the rear segment of the snake bone: mainly provide rigidity and support force, and have a slight angle bending effect. The rear segment 104 only needs to perform a small direction turning bend at the rear end, and has a certain supporting effect on the bending (the farther the snake bone is to the rear, the greater the force it needs to bear when pulling the steel wire rope to bend, the greater the cutting angle, the shorter the length, and the worse the structural strength), so each movable segment 106 needs to have a smaller cutting angle a and a larger length a, such as Figure 2 The angle a is 5°±1°, and the length a is 3.2±0.2mm. The number of the movable segments 106 in the rear segment is selected according to the product and the length as needed, and the number of the segments is 4±2. The fixed pressure grooves 1065 are alternated left and right instead of being symmetrical, because the internal space of the snake bone is limited, and the internal minimum space needs to be controlled. The left and right alternating pressure grooves can ensure that the minimum space of the pressure groove part can also meet the demand, and the pipeline can avoid the pressure groove arrangement left and right.

[0079] 5. Design of the tail segment: the tail segment 105 needs to be welded with the capillary tube 3 (through which the steel wire rope is pulled to limit the movement of the steel wire rope to avoid twisting and knotting) and connected with the hose 4 (woven mesh tube). The observation hole 1052 is used to observe whether the thin-walled steel tube is in the appropriate position, facilitating positioning during laser welding. The compression notch 1051 is to provide a compression allowance for the tail segment, facilitating the reduction of the outer diameter of the compressed segment of the snake bone.

[0080] 6. Since a gap is required when assembling the distal section 105 with the braided mesh tube, but the outer diameter of the insertion part needs to be controlled for entry into the human body, there are limitations on the outer diameters of the snake bone 1 and the braided mesh tube. The outer diameter of the snake bone 1 will be larger than the inner diameter of the braided mesh tube. A tungsten carbide rod can be inserted into the snake bone first to ensure that the inner diameter of the snake bone 1 meets the requirements without excessive compression. Then, a snake bone 1 outer diameter compression tool is used to apply pressure evenly from multiple directions, compressing the outer diameter of the distal section with the compression cut 1051. This ensures that the inner diameter remains sufficient while compressing the outer diameter of the distal section 105 assembly section. The compressed distal section 105 is then inserted into the braided mesh tube and secured with adhesive.

[0081] 7. Using a snake-bone capillary welding fixture, the capillary is precisely fitted to the snake bone. Through the observation hole 1052, the length of the capillary 3 entering the snake bone 1 and the corresponding position of the capillary 3 are confirmed, which facilitates accurate positioning and reliable welding during laser welding.

[0082] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electronic endoscope bending mechanism, characterized in that, The device includes a snake skeleton (1), a control end (2), and a pulling rope. The snake skeleton (1) includes a terminal segment (105). A capillary tube (3) and a flexible tube (4) are provided between the terminal segment (105) and the control end (2). One end of the flexible tube (4) is connected to the control end (2), and the other end is connected to the terminal segment (105). One end of the capillary tube (3) is connected to the inside of the terminal segment (105), and the other end passes through the flexible tube (4) and connects to the inside of the control end (2). The first end of the pulling rope is connected to the control end (2), and the end passes through the capillary tube (3) and enters the snake skeleton (1).

2. The electronic endoscope bending mechanism according to claim 1, characterized in that, The end of the last section (105) is provided with a compression cut (1051) along the length direction of the last section (105). The part of the last section (105) located in the compression cut (1051) forms a compression section, and the other part is the main body section. The outer diameter of the main body section is larger than the outer diameter of the compression section. The hose (4) is connected to the end section (105) by being sleeved on the compression section.

3. The electronic endoscope bending mechanism according to claim 2, characterized in that, The outer diameter of the compression section is adapted to the inner diameter of the hose (4), the outer diameter of the main body section is larger than the inner diameter of the hose (4), and the outer diameter of the main body section is the same as the outer diameter of the hose (4).

4. The electronic endoscope bending mechanism according to claim 2, characterized in that, The main body of the end section (105) is provided with an observation hole (1052), and the end of the capillary (3) extends into the main body of the end section (105) and passes through the observation hole (1052); the end of the capillary (3) is ultrasonically welded into the main body of the end section (105).

5. The electronic endoscope bending mechanism according to claim 2, characterized in that, The compression cut (1051) is symmetrically arranged in two places.

6. The electronic endoscope bending mechanism according to claim 1, characterized in that, The wall of the snake bone (1) is provided with a fixed pressure groove that is recessed inward. Along the axial direction of the snake bone (1), the two ends of the fixed pressure groove are open, so that the inside of the fixed pressure groove is connected with the inside of the snake bone. Along the axial direction of the snake bone (1), the fixed pressure groove is alternately arranged on the left and right sides of the wall of the snake bone (1).

7. The electronic endoscope bending mechanism according to claim 1, characterized in that, The control terminal (2) includes a handle housing (201), which includes an upper housing and a lower housing. A fixing groove (2011) is provided on the surface of the upper housing or the lower housing, and the capillary tube (3) is installed in the fixing groove (2011).

8. The electronic endoscope bending mechanism according to claim 1, characterized in that, The capillary tube (3) is connected to the end section (105) by ultrasonic welding; the capillary tube (3) is a metal tough capillary tube; the hose (4) is a braided mesh tube.

9. The electronic endoscope bending mechanism according to claim 1, characterized in that, The snake skeleton (1) comprises the first segment (101), the anterior segment (102), the middle segment (103), the posterior segment (104), and the posterior segment (105) connected in sequence; The front section (102), middle section (103), and rear section (104) are all bendable segments, and the bending angles of the front section (102) and middle section (103) are greater than the bending angle of the rear section (104). The front section (102), middle section (103), and rear section (104) each include several movable sections (106) with the same structure. One end of each movable section (106) is provided with a C-shaped arm (1061), and the other end is provided with a C-shaped groove (1062). The movable sections (106) are connected to each other by the C-shaped arm (1061) installed in the C-shaped groove (1062). Each segment is bent by the rotation of the C-shaped arm (1061) of the movable section (106) in the C-shaped groove (1062).

10. The electronic endoscope bending mechanism according to claim 9, characterized in that, The cylindrical wall of the movable section (106) is provided with a fixed pressure groove (1065) that is recessed inward. Along the axial direction of the movable section (106), the fixed pressure groove (1065) is open at both ends, so that the interior of the fixed pressure groove (1065) is connected to the interior of the movable section (106). Along the axial direction of the snake bone (1), the fixed pressure groove (1065) is alternately arranged on the left and right sides of the cylindrical wall of the snake bone (1).

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