Traction wheel driving assembly and endoscope

Abstract

The utility model provides a traction wheel driving assembly and an endoscope, relates to the technical field of endoscopes, and solves the problems that in the prior art, an assembly structure of a traction wheel and a shifting part is complex, and the cost is high. The traction wheel driving assembly adopted by the endoscope comprises a mounting shell, a traction wheel and a turntable, the mounting shell is provided with a mounting hole; the traction wheel is rotatably arranged on one side of the mounting shell and is provided with a positioning hole; the rotating disc is rotationally buckled to the mounting shell, and a positioning column is arranged at one end of the rotating disc, penetrates through the mounting hole and is matched with the positioning hole in a rotation stopping and inserting mode. According to the utility model, the turntable is rotationally connected to the mounting shell in a buckling manner, and the positioning columns arranged on the turntable are inserted into the positioning holes in the traction wheel to realize rotation stopping connection, so that torque is transmitted to the turntable. A rotating shaft does not need to be arranged, so that the connecting structure and the assembling complexity of the traction wheel and the rotating disc are simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of endoscopes, in particular to a traction wheel driving component and an endoscope. Background Art

[0002] An endoscope is inserted into the human body through a natural or artificial cavity for inspection or treatment. When using an endoscope, it is usually necessary to adjust the direction of the insertion part in real time so that the front end component at the far end of the insertion part can smoothly pass through the cavity and reach the lesion site for observation.

[0003] The operator turns the lever installed on the operating part to drive the traction wheel to rotate, thereby controlling the traction rope to pull the active bending section of the insertion part, so as to adjust the direction of the insertion part.

[0004] In the prior art, the traction wheel and the toggle component (including the existing forms of the toggle lever and the rotating wheel) are connected and fixed in series through a rotating shaft rotatably mounted on the housing of the operating part to form a traction wheel driving assembly, so that the traction wheel and the toggle component can rotate synchronously. However, this connection method of the traction wheel driving assembly makes the assembly structure of the traction wheel and the toggle component more complicated and the cost is higher. Utility Model Content

[0005] The utility model aims to design a traction wheel driving assembly and an endoscope, so as to solve the problem that the assembly structure of the traction wheel and the toggle component is relatively complicated and the cost is high.

[0006] The utility model is realized by the following technical solutions:

[0007] The utility model provides a traction wheel driving component, comprising a mounting shell, a traction wheel and a rotating disk; the mounting shell is provided with a mounting hole; the traction wheel is rotatably arranged on one side of the mounting shell and is provided with a positioning hole; the rotating disk is rotatably buckled with the mounting shell, one end of the rotating disk is provided with a positioning column, the positioning column passes through the mounting hole and is locked with the positioning hole, so that the rotating disk can be rotated to drive the traction wheel to rotate synchronously and coaxially therewith.

[0008] When the above-mentioned setting structure is adopted, the rotating disk is rotatably connected to the mounting shell by buckling, and the rotation-stopping connection is realized by plugging and matching the positioning column arranged on the end surface of the rotating disk with the corresponding positioning hole arranged on the traction wheel, so as to transmit torque to the traction wheel. In this way, it is not necessary to arrange a rotating shaft between the traction wheel and the rotating disk, which not only saves the rotating shaft as an independent component, but also saves some fastening components and / or limiting structures installed on the rotating shaft for installing the traction wheel and the rotating disk, so that the connection structure and assembly complexity between the traction wheel and the rotating disk are simplified, which not only saves costs, but also makes the space occupied by the traction wheel and the rotating disk smaller, which is conducive to further reducing the size design of the operating part at the traction wheel.

[0009] In order to better realize the present utility model, the following setting structure is particularly adopted: an annular clamping portion is fixedly provided at one end of the turntable, and the annular clamping portion is coaxially inserted into the mounting hole. The annular clamping portion is axially abutted against the parts of the mounting shell located at both ends of the mounting hole at the same time, so that the annular clamping portion can be axially positioned relative to the mounting hole and coaxially rotated.

[0010] When the above-mentioned setting structure is adopted, the annular clamping part is set on the turntable, and the turntable is buckled on the mounting shell through the annular clamping part to achieve rotation relative to the mounting shell. In this way, on the basis of achieving the rotational buckling connection between the turntable and the mounting shell, the mounting hole on the mounting shell itself can be utilized to cooperate with the turntable without modification, which is conducive to modification of the existing operating part.

[0011] In order to further better realize the present utility model, the following setting structure is particularly adopted: the annular clamping portion includes a plurality of clamping blocks arranged in sequence along its circumference, a gap is formed between two adjacent clamping blocks, the outer circumferential surface of the clamping block forms an arc-shaped groove extending circumferentially, and the two groove walls of the arc-shaped groove axially clamp the mounting shell.

[0012] When the above-mentioned setting structure is adopted, multiple clamping blocks are arranged along the circumferential direction to provide the function of the annular clamping part. In addition to saving the manufacturing material of the annular clamping part, the annular clamping part as a whole can also have a better ability to deform inward, which makes it easier for the annular clamping part to pass through the mounting hole, facilitate the turntable to be buckled onto the mounting shell, and also facilitate the turntable to be removed from the mounting shell.

[0013] In order to better realize the present invention, the following configuration is particularly adopted: a lever for shifting to drive the rotating disk to rotate is fixedly connected to the radial circumference of the rotating disk.

[0014] In order to further better realize the utility model, the following setting structure is particularly adopted: compared with the width of two adjacent setting gaps, the setting gap far away from the shifting rod is smaller.

[0015] When the above-mentioned setting structure is adopted, a gap is set to be formed between two adjacent clamping blocks, and relative to the lever, the gap is set to gradually widen from far to near, which is conducive to the annular clamping part being clamped into the mounting hole. It can ensure that the part of the annular clamping part away from the lever has sufficient strength and is not easy to deform when subjected to a large radial extrusion force, so as to affect the smoothness of rotation of the turntable.

[0016] In order to further better realize the utility model, the following setting structure is particularly adopted: among all the setting gaps, the shifting rod and two of the setting gaps are arranged in sequence along the radial direction of the rotating disk.

[0017] When the above setting structure is adopted, the two setting gaps and the lever are arranged in sequence along the radial direction of the turntable, so that the lever faces the narrowest and widest setting gaps, which can make the turntable easier to disassemble and assemble, and ensure that the turntable has good rotation smoothness.

[0018] In order to better realize the present invention, the following configuration is particularly adopted: the end of the clamping block axially abuts against the end surface of the traction wheel.

[0019] When the above-mentioned structure is adopted, the clamping block provided on the rotating disk is used to abut the traction wheel axially, so that the traction wheel and the rotating disk can abut against each other with a relatively simple structure.

[0020] In order to further better implement the present invention, the following configuration structure is particularly adopted: a gap is formed between the shifting rod and the outer side surface of the mounting shell.

[0021] In order to better realize the utility model, the following setting structure is particularly adopted: the outer side surface of the mounting shell is provided with a first annular boss arranged around the mounting hole, and the end surface of the first annular boss axially abuts against the end surface of the turntable.

[0022] When the above-mentioned setting structure is adopted, the first annular boss arranged on the outer side of the mounting shell can raise the turntable for a certain distance, thereby avoiding collision and friction between the turntable and other parts of the mounting shell, ensuring that the turntable can rotate smoothly. At the same time, the raised turntable also raises the lever, thereby avoiding the lever causing wear on the rotation direction indicator mark arranged on the mounting shell.

[0023] In order to further better realize the utility model, the following setting structure is particularly adopted: the outer side surface of the mounting shell is provided with a second annular boss arranged around the turntable, and the second annular boss can stop the circumference of the rotating turntable to limit the degree of deflection of the turntable.

[0024] When the above-mentioned structure is adopted, the second annular boss surrounds the turntable to provide support for it, which can well maintain the coaxiality between the turntable and the mounting hole.

[0025] In order to further better realize the present utility model, the following setting structure is particularly adopted: an opening is set on the side of the second annular boss facing the shift rod to form a limit groove, the shift rod is inserted into the limit groove and can switch between a first position and a second position relative to the limit groove, when the shift rod is in the first position, the shift rod abuts against one side wall of the limit groove, and when the shift rod is in the second position, the shift rod abuts against the other side wall of the limit groove.

[0026] When the above-mentioned setting structure is adopted, the second annular boss is used to form a limit groove that limits the position of the lever, so as to limit the rotation angle of the turntable, which can effectively avoid excessive steering and damage to the active bending section on the traction rope and the insertion part of the endoscope.

[0027] In order to further better realize the present utility model, the following setting structure is particularly adopted: the positioning hole is located at the center of the traction wheel and is set as a spline hole, and the positioning column is set as a spline shaft adapted to the spline hole; and / or, at least one positioning hole is set at the eccentric position of the traction wheel, and at least one positioning column is inserted into one positioning hole.

[0028] In order to further better realize the present utility model, the following setting structure is particularly adopted: the positioning hole is set as a circular hole, and a plurality of ribs arranged in sequence along the circumferential direction are set on the circumferential surface of the positioning column at the inner side of the positioning hole, and the ribs are in radial contact with the positioning hole to keep the positioning column and the positioning hole coaxial.

[0029] When the above-mentioned setting structure is adopted, the ribs arranged on the positioning column make the contact surface between the positioning column and the positioning hole smaller, so that when the positioning column is inserted into the positioning hole in an aligned manner, the ribs are easily deformed by pressure, so that the positioning column can be inserted into the positioning hole more easily, reducing the difficulty of assembling the two. In this case, the production accuracy requirements for the positioning column and / or the positioning hole can be reduced, so as to further reduce the production cost of the turntable and / or the traction wheel. At the same time, when multiple ribs are arranged on the positioning column, less material can be used to obtain sufficient strength.

[0030] In order to better realize the present utility model, the following setting structure is particularly adopted: the rib extends along the axial direction of the positioning column to the end face of the turntable, and the part where the rib is connected to the end face of the turntable forms a triangular support part, and the triangular support part gradually narrows from the end face of the turntable toward the circumference of the positioning column in the direction away from the end face of the turntable.

[0031] When the above-mentioned structure is adopted, the ribs are widened at the root of the positioning column to form a triangular support portion, which can further improve the strength of the positioning column and ensure that the positioning column is not easily deformed, so as to drive the traction wheel to accurately perform rotation at various angles.

[0032] In order to better realize the utility model, the following setting structure is particularly adopted: the two ribs are arranged on the positioning column and are relatively arranged along the rotation direction of the turntable.

[0033] When the above-mentioned setting structure is adopted, during the process of the turntable driving the traction wheel to rotate, the two ribs arranged opposite to each other in the rotation direction of the turntable can radially abut against the hole walls of the corresponding positioning holes through their outer sides to transmit torque, allowing the ribs to withstand the pressure from the front, thereby avoiding deformation of the ribs caused by shear force.

[0034] The utility model also provides an endoscope, which comprises a cover shell and the above-mentioned traction wheel driving assembly, wherein the cover shell is matched with the mounting shell, and the traction wheel is rotatably connected with the cover shell in an axially positioned manner.

[0035] The utility model has the following advantages and beneficial effects:

[0036] In the utility model, the turntable is rotatably connected to the mounting shell by buckling, and the anti-rotation connection is realized by plugging and matching the positioning column arranged on the end surface of the turntable with the positioning hole arranged on the traction wheel correspondingly, so as to transmit torque to the turntable. In this way, there is no need to arrange a rotating shaft between the traction wheel and the turntable, which not only saves the rotating shaft as an independent component, but also saves some fastening components and / or limiting structures installed on the rotating shaft for installing the traction wheel and the turntable, so that the connection structure and assembly complexity between the traction wheel and the turntable are simplified, which not only saves costs, but also makes the space occupied by the traction wheel and the turntable smaller, which is conducive to further reducing the size design of the operating part at the traction wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 It is a schematic diagram of the structure of the operating part of the endoscope;

[0039] Figure 2 yes Figure 1 A magnified view of the part A in the middle;

[0040] Figure 3 It is a schematic diagram of the structure of one side of the traction wheel drive assembly;

[0041] Figure 4 yes Figure 3 A magnified view of the part B in the middle;

[0042] Figure 5 Shown in Figure 4 The structure behind the traction wheel is removed on the basis;

[0043] Figure 6 The traction wheel drive assembly is Figure 3 Explosion diagram of the middle part B;

[0044] Figure 7 A schematic diagram showing the connection between the turntable and the traction wheel is shown;

[0045] Figure 8 The outer side structure of the mounting hole of the mounting shell is shown;

[0046] Fig. 9 The axial structure of the turntable is shown.

[0047] The markings in the figure are:

[0048] 1. Mounting shell; 11. Mounting hole; 12. First annular boss; 13. Second annular boss; 131. Limiting groove; 131a. One side groove wall; 131b. The other side groove wall;

[0049] 2. Traction wheel; 21. Positioning hole; 22. Blind hole;

[0050] 3. Turntable; 31. Annular clamping part; 31a. Clamping block; 31b. Setting gap; 311. Arc groove; 32. Positioning column; 321. Rib; 321a. Triangular support part;

[0051] 4. lever; 41. connecting portion; 42. shifting portion;

[0052] 5. Cover the shell. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0054] In the description of the present utility model, it should be noted that, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0055] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0056] On the one hand, the present application provides a traction wheel drive assembly, which can simplify the assembly structure and setting cost between the traction wheel and the toggle component to a certain extent. Figure 1-Figure 9 As shown, the traction wheel drive assembly is particularly configured as follows:

[0057] The traction wheel driving assembly includes a mounting shell 1 , a traction wheel 2 and a rotating disc 3 .

[0058] The traction wheel 2 is used to install the traction rope, and the traction rope is pulled by rotating relative to the housing of the operating part to adjust the direction of the insertion part. The housing of the operating part includes two matching parts, one is the mounting shell 1, and the other is the cover shell 5, which provide internal space for various components after matching.

[0059] like Figure 6 and Figure 8 As shown, the mounting shell 1 is provided with a mounting hole 11 penetrating the shell wall at a position corresponding to the traction wheel 2. In the prior art, the mounting hole 11 is mainly used to penetrate the rotating shaft for serially connecting the traction wheel and the toggle component.

[0060] like Figure 4 and Figure 6 As shown, the traction wheel 2 is arranged inside the mounting shell 1, can rotate around its axis relative to the mounting shell 1, and is coaxially arranged with the mounting hole 11. The traction wheel 2 is a disc-shaped member with a small thickness, and is provided with a positioning hole 21 that penetrates it in a direction parallel to the axis.

[0061] The turntable 3 is a component for manual operation, and drives the traction wheel 2 to rotate synchronously and coaxially by rotating relative to the mounting shell 1. Therefore, a part of the turntable 3 is located outside the mounting shell 1, and a part is located inside the mounting shell 1 and connected to the traction wheel 2.

[0062] like Figure 2 , Figure 4-Figure 7 As shown, the turntable 3 and the mounting shell 1 are buckled with each other by a snap-fit ​​structure, so that the turntable 3 can rotate on the mounting shell 1. A positioning column 32 is provided on one end surface of the turntable 3, and the positioning column 32 extends toward the inner side of the mounting shell 1 through the mounting hole 11 and is inserted into the positioning hole 21 provided on the traction wheel 2. The mutually mating positioning column 32 and the positioning hole 21 almost do not rotate relative to each other, so that the turntable 3 and the traction wheel 2 are stopped by the mating positioning column 32 and the positioning hole 21, so that when the turntable 3 is rotated, the traction wheel 2 can be driven to rotate synchronously and coaxially with it.

[0063] In this embodiment, the rotating disk 3 and the mounting shell 1 are buckled with each other by a buckle structure, so that the rotating disk 3 can be installed on the mounting shell 1 and ensure that it can rotate relative to the mounting shell 1. At the same time, the rotation-stopping connection is realized by plugging and matching the positioning column 32 provided on the end surface of the rotating disk 3 with the corresponding positioning hole 21 provided on the traction wheel 2, so that the rotating disk 3 can be used to transmit torque to the traction wheel 2 and drive the traction wheel 2 to rotate synchronously. According to this arrangement, there is no need to set a rotating shaft between the traction wheel 2 and the rotating disk 3, which not only saves the rotating shaft as an independent component, but also saves some fastening components and / or limiting structures installed on the rotating shaft for installing the traction wheel 2 and the rotating disk 3. As a result, the connection structure and assembly complexity between the traction wheel 2 and the rotating disk 3 are simplified, which not only saves costs, but also makes the space occupied by the traction wheel 2 and the rotating disk 3 smaller, which is conducive to further reducing the size design of the operating part at the traction wheel 2.

[0064] According to some optional embodiments, the buckle structure is arranged on the turntable 3, specifically, as Figure 6 As shown, an annular clamping portion 31 is fixedly disposed on one end surface of the rotating disk 3 and is arranged around its axis. A clamping groove is formed on the outer peripheral surface of the annular clamping portion 31. Figure 5 As shown, when the turntable 3 is buckled onto the mounting shell 1, the annular clamping portion 31 on the turntable 3 is coaxially inserted into the mounting hole 11 of the mounting shell 1, and the annular clamping portion 31 accommodates the mounting hole 11 therein through the clamping groove, so that the annular clamping portion 31 utilizes the groove walls on both sides of the clamping groove to axially abut against the parts of the mounting shell 1 located at both ends of the mounting hole 11, so that the annular clamping portion 31 is axially positioned with the mounting hole 11, and the annular clamping portion 31 can rotate coaxially relative to the mounting hole 11, thereby allowing the turntable 3 to rotate relative to the mounting shell 1.

[0065] In this embodiment, the annular clamping portion 31 is provided on the turntable 3, and the turntable 3 is buckled on the mounting shell 1 through the annular clamping portion 31 to achieve rotation relative to the mounting shell 1. In this way, on the basis of achieving the rotational buckling connection between the turntable 3 and the mounting shell 1, the mounting hole 11 provided on the mounting shell 1 itself can be utilized to cooperate with the turntable 3 without modification, which is conducive to modifying the existing operating part.

[0066] Preferably, the annular clamping portion 31 does not adopt a complete arrangement structure around the entire circumference, but adopts a structure as follows: Figure 6 Specifically, the annular clamping portion 31 includes a plurality of clamping blocks 31a, such as Figure 6 The four blocks in the turntable 3 are arranged in sequence along the circumference of the turntable 3, so that a gap 31b is formed between two adjacent clamping blocks 31a, thereby making the annular clamping portion 31 incomplete. The outer circumferential surface of the clamping block 31a forms an arc groove 311 extending in the circumferential direction, and all the arc grooves 311 are arranged in sequence along the circumferential direction to form an incomplete clamping groove. Figure 5 As shown, each clamping block 31a is axially clamped by two groove walls of the arc-shaped groove 311 to clamp the mounting shell 1 so that the turntable 3 is axially positioned on the mounting shell 1 and can rotate relative to the mounting shell 1. The use of multiple clamping blocks 31a arranged in the circumferential direction to provide the function of the annular clamping portion 31 can save the manufacturing material of the annular clamping portion 31. Since the independent clamping blocks 31a bear the extrusion force during buckling alone, the clamping blocks 31a are easy to deform, which makes the annular clamping portion 31 as a whole have a better ability to deform inwards, so that the annular clamping portion 31 as a whole can pass through the mounting hole 11, which can facilitate the buckling of the turntable 3 on the mounting shell 1 and the removal of the turntable 3 from the mounting shell 1.

[0067] Of course, the annular clamping portion 31 can also be composed of two clamping blocks 31a. In this case, the two clamping blocks 31a should be arranged in sequence along the radial direction of the rotating disk 3, that is, the angle is 180°. The annular clamping portion 31 can also be composed of three clamping blocks 31a. In this case, the three clamping blocks 31a can be arranged at an angle of 120°. The annular clamping portion 31 can also be composed of five or six clamping blocks 31a, but if there are more clamping blocks 31a, it may cause the problem of difficulty in buckling the annular clamping portion 31 as a whole with the mounting shell 1, because this may require more clamping blocks 31a to be deformed inwardly at the same time. For example, when multiple clamping blocks 31a on one side need to be deformed inwardly at the same time to be inserted into the mounting hole 11, as long as one clamping block 31a is not accurately controlled to deform inwardly, but abuts against the edge of the mounting hole 11, it will be difficult for one side of the annular clamping portion 31 to be inserted into the mounting hole 11, resulting in difficulty in buckling.

[0068] Therefore, the number of the clamping blocks 31a should not be too many, and is generally preferably three to six.

[0069] According to some optional embodiments, Figure 6 As shown, a lever 4 is provided on one side of the rotating disk 3 in the radial direction, and one end of the lever 4 is connected and fixed on the circumference of the rotating disk 3. The lever 4 is used to drive the rotating disk 3 to rotate by pressing a finger on it.

[0070] For example, Figure 7 As shown, the lever 4 is configured as an L-shaped member, including a substantially vertical and connected connecting portion 41 and a toggle portion 42 , wherein the connecting portion 41 extends radially along the turntable 3 and is fixedly connected to the circumference of the turntable 3 , and the toggle portion 42 extends axially along the turntable 3 .

[0071] Preferably, when the turntable 3 is buckled on the mounting shell 1 , a gap is formed between the lever 4 and the outer side surface of the mounting shell 1 , and there is no contact or friction between them.

[0072] According to some optional embodiments, the rotating disk 3 is connected with the lever 4 and the annular clamping portion 31 is composed of a plurality of clamping blocks 31a. Fig. 9 As shown, when two adjacent gaps 31b are compared, the gap width of the gap 31b that is far from the lever 4 is smaller, that is, the adjacent sides of the two adjacent clamping blocks 31a that form the gap 31b are farther apart. Relative to the lever 4, the gap 31b gradually widens from far to near, which is conducive to the annular clamping portion 31 being clamped into the mounting hole 11, and can ensure that the part of the annular clamping portion 31 far from the lever 4 has sufficient strength, and is not easy to deform when subjected to a large radial extrusion force, so as to affect the smoothness of the rotation of the turntable 3.

[0073] Preferably, Fig. 9 As shown, among all the setting gaps 31b, the lever 4 and two of the setting gaps 31b are arranged in sequence along the radial direction of the turntable 3. This arrangement will make the lever 4 face the two narrowest and widest setting gaps 31b. When the turntable 3 is buckled, the side away from the lever 4 is generally inserted into the mounting hole 11 first. Since the clamping block 31a of the first inserted part does not need to be deformed inward to be inserted into the mounting hole 11, the setting gap 31b close to the lever 4 is set larger, and the clamping block 31a that is easier to install later is deformed inward and squeezed into the mounting hole 11 to complete the buckling of the annular clamping part 31. The disassembly is the same but the steps are opposite. Therefore, this arrangement can make the disassembly and assembly of the turntable 3 easier. When the lever 4 is just operated, a radial thrust is applied to the turntable 3 through the lever 4, so that the portion of the turntable 3 away from the lever 4 is pushed against the mounting hole 11. Therefore, the gap 31b away from the lever 4 is set to be narrower, which can better ensure the strength here and prevent deformation, thereby ensuring that the turntable 3 has better rotation smoothness.

[0074] Fig. 9The case where four clamping blocks 31 a are provided is specifically given in the figure. If two clamping blocks 31 are provided, the two clamping blocks 31 are symmetrically provided on the left and right sides of the lever 4.

[0075] According to some optional embodiments, Figure 7 As shown, the free end of the clamping block 31a provided on the rotating disk 3 axially abuts against the end surface of the traction wheel 2, axially limiting the traction wheel 2 and preventing the traction wheel 2 from moving toward the rotating disk 3. In this embodiment, the clamping block 31a provided on the rotating disk 3 is used to axially abut the traction wheel 2, so that the traction wheel 2 and the rotating disk 3 can abut against each other with a relatively simple structure.

[0076] According to some optional embodiments, Figure 8 As shown, the outer side of the mounting shell 1 is provided with a raised first annular boss 12, and the first annular boss 12 is adjacent to the edge of the mounting hole 11 and surrounds the mounting hole 11. Figure 2 As shown, the end surface of the first annular boss 12 is axially abutted against the end surface of the turntable 3, and the turntable 3 is lifted off the outer side surface of the mounting shell 1 as a whole, and the lifting height only needs to be a small distance.

[0077] In this embodiment, the first annular boss 12 provided on the outer side surface of the mounting shell 1 can lift the turntable 3 for a certain distance. At the same time, the raised turntable 3 causes the lever 4 to be also raised, so as to avoid collision and friction between the turntable 3 and the lever 4 and other parts of the mounting shell 1 when the turntable 3 and the lever 4 are deformed toward the mounting shell 1 by force, thereby ensuring that the turntable 3 can rotate smoothly and also effectively preventing the lever 4 from causing wear to the rotation direction indicator mark provided on the mounting shell 1.

[0078] According to some optional embodiments, Figure 8 As shown, the outer side of the mounting shell 1 is provided with a raised second annular boss 13, and the second annular boss 13 is arranged adjacent to the mounting hole 11 and around the mounting hole 11. Figure 2 As shown, the second annular boss 13 is arranged around the turntable 3, and the inner side surface of the second annular boss 13 is in contact with the circumferential surface of the turntable 3 or there is a small gap, so that the second annular boss 13 can provide support for the rotating turntable 3, specifically by stopping the circumferential surface of the turntable 3 to limit the degree of deflection of the turntable 3 relative to the mounting hole 11, which can well maintain the coaxiality of the turntable 3 and the mounting hole 11.

[0079] Preferably, the first annular boss 12 in the above embodiment is also disposed on the outer surface of the mounting shell 1 , and the first annular boss 12 is located inside the second annular boss 13 and is adjacent to the second annular boss 13 .

[0080] Preferably, Figure 2 and Figure 8As shown, the second annular boss 13 is provided with an opening on the side facing the lever 4 to form a limiting groove 131, and the connecting portion 41 of the lever 4 is inserted into the limiting groove 131. This allows the second annular boss 13 to be arranged higher to stop a larger portion of the rotating disk 3 in the axial direction, while not increasing the thickness of the rotating disk 3 and the gap between the connecting portion 41 of the lever 4 and the mounting housing 1.

[0081] During the rotation of the turntable 3, the lever 4 can switch between the first position and the second position relative to the limiting groove 131. When the lever 4 is in the first position, the lever 4 abuts against the groove wall 131a on one side of the limiting groove 131. When the lever 4 is in the second position, the lever 4 abuts against the groove wall 131b on the other side of the limiting groove 131. It can be seen that the limiting groove 131 that has a limiting effect on the position of the lever 4 is formed by the second annular boss 13, and the rotation angle of the turntable 3 can be limited, which can effectively avoid over-steering and damage to the active bending section on the traction rope and the insertion part of the endoscope.

[0082] According to some optional embodiments, between the rotating disk 3 and the traction wheel 2, the traction wheel 2 is provided with at least one positioning hole 21 at its eccentric position, such as Figure 6 As shown in the two figures, at least one positioning post 32 is inserted into one positioning hole 21 .

[0083] Exemplarily, the positioning hole 21 is configured as a long hole perpendicular to the diameter or extending in the circumferential direction, and two positioning posts 32 are inserted into the long hole at the same time, and the two positioning posts 32 are respectively against the two side walls of the long hole.

[0084] For example, Figure 4 and Figure 8 As shown, the positioning hole is set as a round hole, and a positioning column 32 is inserted into the round hole alone.

[0085] Of course, the positioning hole 21 can also be set as a spline hole located at the center of the traction wheel 2. In this case, the positioning column 32 is correspondingly set as a spline shaft adapted to the spline hole.

[0086] When adjusting the direction of the insertion portion of the endoscope, the turntable 3 is driven to rotate by turning the lever 4, and the positioning column 32 of the turntable 3 abuts against the hole wall of the positioning hole 21, driving the traction wheel 2 to rotate synchronously.

[0087] According to some optional embodiments, Figure 4-Figure 7 As shown in FIG. 1 , when the positioning hole 21 on the traction wheel 2 is set as a round hole, the positioning column 32 is preferably set as a round column, and the positioning column 32 is inserted into the positioning hole 21. A plurality of ribs 321 are provided on the circumference of the positioning column 32, such as Figure 5 and Figure 6As shown, these ribs 321 are arranged in sequence along the circumference of the positioning column 32, and are extended along the axial direction of the positioning column 32 to strengthen the structural strength of at least part of the positioning column 32. Part or all of the ribs 321 are located at the inner side of the positioning hole 21. When the positioning column 32 is inserted into the positioning hole 21, the ribs 321 are in radial contact with the positioning hole 21 to keep the positioning column 32 and the positioning hole 21 coaxial.

[0088] The ribs 321 provided on the positioning column 32 of this embodiment make the contact surface between the positioning column 32 and the positioning hole 21 smaller, so that when the positioning column 32 is inserted into the positioning hole 21 in an aligned manner, the ribs 321 are easily deformed by pressure, so that the positioning column 32 can be more easily inserted into the positioning hole 21, reducing the difficulty of assembling the two. In this case, the production accuracy requirements for the positioning column 32 and / or the positioning hole 21 can be reduced, so as to further reduce the production cost of the rotating disk 3 and / or the traction wheel 2. At the same time, when multiple ribs 321 are arranged on the positioning column 32, less material can be used to obtain sufficient strength.

[0089] Preferably, in order to strengthen the strength of the entire section of the positioning column 32, as Figure 6 and Figure 7 As shown, the rib 321 extends from the head of the positioning post 32 to the root of the turntable 3 and is integrally formed with the end surface of the turntable 3 , so that part of the rib 321 is located inside the positioning hole 21 and part is located outside the positioning hole 21 .

[0090] In order to further improve the strength of the positioning column 32, the rib 321 is extended from the free end of the positioning column 32 along the axial direction of the positioning column 32 to the end surface of the rotating disk 3, and the portion where the rib 321 is connected to the end surface of the rotating disk 3 is formed as follows: Figure 5 and Figure 6 As shown in the figure, the triangular support portion 321a gradually narrows toward the circumference of the positioning column 32 along the direction away from the end surface of the turntable 3, so that the rib 321 is widened at the root position on the positioning column 32, which can further improve the strength of the positioning column 32 and ensure that the positioning column 32 is not easily deformed, so as to drive the traction wheel 2 to accurately perform rotation at various angles.

[0091] At least two ribs 321 are provided. In the case of two ribs, the ribs 321 are symmetrically arranged at intervals of 180° on the positioning column 32. In the case of more than two ribs, the ribs 321 are preferably distributed in sequence in an equal angle manner.

[0092] Preferably, two of the ribs 321 are arranged on the positioning column 32 in a direction of rotation of the turntable 3, and the angle between the two ribs 321 is approximately 180°. Figure 5In this way, when the rotating disk 3 drives the traction wheel 2 to rotate, the two ribs 321 arranged opposite to each other in the rotating direction of the rotating disk 3 can radially abut against the hole wall of the corresponding positioning hole 21 through their outer side surfaces to transmit torque, so that the ribs 321 bear the pressure from the front, which can prevent the ribs 321 from being deformed by shear force.

[0093] On the other hand, the utility model also provides an endoscope, which particularly adopts the following configuration structure:

[0094] In this embodiment, the endoscope includes a cover shell 5 and a traction wheel drive assembly in any of the above embodiments. Figure 1 and Figure 2 As shown, the cover shell 5 is matched with the mounting shell 1 to form a handle of the operating part, and the turntable 3 is rotatably buckled on the mounting shell 1 and inserted into the positioning hole 21 set in the traction wheel 2 through the positioning column 32, so that the turntable 3 and the traction wheel 2 cannot rotate relative to each other.

[0095] According to some optional embodiments, one end of the traction wheel 2 is axially abutted against the end of the annular clamping portion 31 provided on the rotating disk 3, and the other end of the traction wheel 2 is axially abutted against the cover shell 5, so that the traction wheel 2 is axially positioned between the cover shell 5 and the mounting shell 1. Exemplarily, a blind hole 22 is provided at the other end of the traction wheel 2, and a fixed shaft is provided on the inner side of the cover shell 5, and the fixed shaft extends into the blind hole 22 and is rotatably plugged therewith, and at the same time, the end of the fixed shaft axially abuts against the bottom of the blind hole 22 to axially position it.

[0096] According to some optional embodiments, Figure 1 and Figure 2 As shown, the shifting portion 42 of the shifting lever 4 is located on the side of the operating portion opposite to the negative pressure suction valve.

[0097] The above description is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention.

Claims

1. A traction wheel drive assembly, characterized in that: include: A mounting shell (1) provided with a mounting hole (11); A traction wheel (2) rotatably disposed on one side of the mounting shell (1) and provided with a positioning hole (21); A rotating disk (3) is rotatably buckled to the mounting shell (1), and a positioning column (32) is provided at one end of the rotating disk (3). The positioning column (32) passes through the mounting hole (11) and is locked with the positioning hole (21) so as to be able to rotate the rotating disk (3) to drive the traction wheel (2) to rotate synchronously and coaxially therewith.

2. A traction wheel drive assembly according to claim 1, characterized in that: An annular clamping portion (31) is fixedly provided at one end of the rotating disk (3); the annular clamping portion (31) is coaxially inserted into the mounting hole (11); the annular clamping portion (31) is axially abutted against portions of the mounting shell (1) located at both ends of the mounting hole (11), so that the annular clamping portion (31) can be axially positioned relative to the mounting hole (11) and coaxially rotated.

3. A traction wheel drive assembly according to claim 2, characterized in that: The annular clamping portion (31) comprises a plurality of clamping blocks (31a) arranged in sequence along its circumference, a gap (31b) is formed between two adjacent clamping blocks (31a), an outer circumferential surface of the clamping block (31a) forms a circumferentially extending arc-shaped groove (311), and two groove walls of the arc-shaped groove (311) axially clamp the mounting shell (1).

4. A traction wheel drive assembly according to claim 3, characterized in that: A lever (4) for shifting to drive the rotating disk (3) to rotate is fixedly connected to the radial circumference of the rotating disk (3).

5. A traction wheel drive assembly according to claim 4, characterized in that: Compared with two adjacent setting gaps (31b), the setting gap (31b) far away from the shifting rod (4) has a smaller width; and / or, among all the set gaps (31b), the lever (4) and two of the set gaps (31b) are arranged in sequence along the radial direction of the rotating disk (3); And / or, the end of the clamping block (31a) axially abuts against the end surface of the traction wheel (2); And / or, a gap is formed between the shifting rod (4) and the outer side surface of the mounting shell (1).

6. A traction wheel drive assembly according to claim 4, characterized in that: The outer side surface of the mounting shell (1) is provided with a first annular boss (12) arranged around the mounting hole (11), and the end surface of the first annular boss (12) axially abuts against the end surface of the rotating disk (3); and / or, The outer side surface of the mounting shell (1) is provided with a second annular boss (13) arranged around the rotating disk (3), and the second annular boss (13) can stop the circumference of the rotating disk (3) in rotation to limit the degree of deflection of the rotating disk (3); The second annular boss (13) is provided with an opening on one side facing the shifting rod (4) to form a limiting groove (131); the shifting rod (4) is inserted into the limiting groove (131) and can be switched between a first position and a second position relative to the limiting groove (131); when the shifting rod (4) is in the first position, the shifting rod (4) abuts against a groove wall (131a) on one side of the limiting groove (131); when the shifting rod (4) is in the second position, the shifting rod (4) abuts against a groove wall (131b) on the other side of the limiting groove (131).

7. The traction wheel drive assembly according to claim 1, characterized in that: At least one positioning hole (21) is provided at an eccentric position of the traction wheel (2), and at least one positioning column (32) is inserted into one of the positioning holes (21).

8. A traction wheel drive assembly according to claim 7, characterized in that: The positioning hole (21) is configured as a circular hole, and a plurality of ribs (321) arranged in sequence along the circumferential direction are configured on the circumferential surface of the positioning column (32) at the inner side of the positioning hole (21), and the ribs (321) are in radial contact with the positioning hole (21) so that the positioning column (32) and the positioning hole (21) remain coaxial.

9. A traction wheel drive assembly according to claim 8, characterized in that: The rib (321) extends along the axial direction of the positioning column (32) to the end surface of the rotating disk (3), and the portion where the rib (321) is connected to the end surface of the rotating disk (3) forms a triangular support portion (321a), and the triangular support portion (321a) gradually narrows from the end surface of the rotating disk (3) toward the circumference of the positioning column (32) in a direction away from the end surface of the rotating disk (3); and / or, The two ribs (321) are arranged on the positioning column (32) opposite to each other along the rotation direction of the rotating disk (3).

10. An endoscope, characterized in that: It comprises a cover shell (5) and a traction wheel drive assembly as claimed in any one of claims 1 to 9, wherein the cover shell (5) is matched with the mounting shell (1), and the traction wheel (2) is rotatably connected to the cover shell (5) in an axially positioned manner.

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