Matching structure of deflector rod and traction wheel, handle and endoscope

Abstract

The invention provides a driving lever and traction wheel matching structure, a handle and an endoscope, and relates to the technical field of endoscopes, the driving lever and traction wheel matching structure comprises a traction wheel rotatably arranged in a handle shell; the shifting rod is connected to the traction wheel in a sliding mode, and the handle shell is provided with a moving channel for the shifting rod to penetrate through; one of the handle shell and the driving lever is provided with a limiting part, the other one of the handle shell and the driving lever is provided with a sliding part, the outer surface of the sliding part is provided with a sliding supporting surface which is sunken towards the rotating center side of the traction wheel, and at least part of the limiting part is in sliding fit with the sliding supporting surface; the elastic part is arranged between the traction wheel and the deflector rod, and the elastic part drives the deflector rod to be close to the rotating center side of the traction wheel all the time so that the limiting part can be tightly attached to the sliding supporting face. Compared with the prior art, the device has the advantage that the finger comfort degree of an operator is improved when the operator pokes the poking rod.

Description

Technical Field

[0001] The present invention relates to the technical field of endoscopes, and in particular to a matching structure of a lever and a traction wheel, a handle and an endoscope. Background Art

[0002] Endoscopes are widely used in modern medical treatment. When used, the operator can press the lever with his fingers to make the lever drive the traction wheel to rotate, that is, the lever is used to rotate the traction wheel to control the position of the traction rope, and finally the active bending section of the insertion part can achieve controllable bending.

[0003] After research, the applicant found that during multiple uses, when the operator moves the lever with his fingers, the operator's fingers often feel uncomfortable. Summary of the invention

[0004] In order to solve the problem of operator's finger discomfort when turning a lever, the present application provides a matching structure of a lever and a traction wheel, a handle and an endoscope.

[0005] In a first aspect, the present application provides a matching structure of a lever and a traction wheel, which adopts the following technical solution: A matching structure of a lever and a traction wheel, comprising: a traction wheel rotatably arranged in a handle housing; a lever slidably connected to the traction wheel, the handle housing being provided with a moving channel for the lever to pass through, one end of the lever located outside the moving channel being a pressing end, the pressing end being used for being pressed by an operator; a limiting portion being provided on one of the handle housing and the lever, and a sliding portion being provided on the other of the handle housing and the lever, the outer surface of the sliding portion having a sliding support surface recessed toward the rotation center side of the traction wheel, at least a part of the limiting portion being slidably matched with the sliding support surface; an elastic portion being provided between the traction wheel and the lever, the elastic portion driving the lever to always approach the rotation center side of the traction wheel so that the limiting portion is closely attached to the sliding support surface, wherein, when the pressing end is moved along the moving channel, the limiting portion slides along the sliding support surface and prompts the lever to slide adaptively in the radial direction of the traction wheel so that the pressing end maintains linear motion relative to the moving channel during the moving process.

[0006] Preferably, the sliding portion is provided with anti-slipping portions at both ends of the sliding support surface, and a side wall surface of the anti-slipping portion close to the sliding support surface is smoothly transitionally connected to the sliding support surface.

[0007] Preferably, the traction wheel has a movable cavity, the movable cavity is arranged along the radial direction of the traction wheel, and a part of the shifting rod is slidably inserted in the movable cavity.

[0008] Preferably, the end surface of the shifting rod abutting against the inner end wall of the moving cavity is a stop surface, and the stop surface is closer to the rotation center of the traction wheel than the recessed part of the sliding support surface.

[0009] Preferably, a locking groove is provided at one end of the movable cavity away from the rotation center of the traction wheel, a locking portion is embedded in the locking groove, the locking portion is slidably matched with the shift rod, the outer diameter of the locking portion is larger than the inner diameter of the locking groove, and the locking portion can be interference fit with the locking groove when the locking portion itself is elastically deformed; the elastic portion is located in the movable cavity, and one end of the elastic portion is stopped against the locking portion, and the other end is stopped against the shift rod.

[0010] Preferably, the locking portion is penetrated by a socket for the lever to pass through, and the inner diameter of the socket is larger than the outer diameter of the lever; the locking portion is also provided with a deformation gap connected to the socket, and the locking portion can elastically contract at the deformation gap under the extrusion of the locking groove.

[0011] Preferably, the locking portion further has a guiding surface, and the guiding surface is used for slidingly cooperating with the inner side wall of the movable cavity to apply an extrusion force to the deformation gap side.

[0012] Preferably, the traction wheel is provided with a limiting hole, the limiting portion extends from the movable cavity through the limiting hole to the sliding support surface, and the extending direction of the limiting hole is consistent with the extending direction of the movable cavity.

[0013] In a second aspect, the present application provides a handle, which adopts the following technical solution: A handle, applied to an endoscope, comprises the matching structure of the shifting rod and the traction wheel described in the above scheme.

[0014] In a third aspect, the present application provides an endoscope, which adopts the following technical solution: An endoscope comprises an insertion portion and the handle described in the above scheme, wherein the insertion portion is arranged at the distal end of the handle.

[0015] The present invention has the following advantages and beneficial effects: The matching relationship between the limiter and the sliding support surface further improves the accuracy of the operation. The sliding support surface is designed to be concave toward the rotation center of the traction wheel, so that the lever can slide along this support surface during operation. This design ensures that the lever remains stable when moving, avoiding discomfort caused by the arc movement of the lever. Through this structure, the movement trajectory of the lever is effectively guided, so that the operator can keep the linear movement of the finger consistent with the smooth sliding of the lever during use, thereby significantly reducing the pressure and fatigue on the finger joints. That is, when the limiter moves on the sliding support surface toward the rotation center of the traction wheel, the lever will shrink on the traction wheel, and the reaction force that the pressing end would originally apply to the operator's finger will be reduced. Similarly, when the limiter moves on the sliding support surface toward the rotation center away from the traction wheel, the lever will extend on the traction wheel, and the reaction force that the pressing end would originally apply to the operator's finger will also be reduced. This design effectively prevents the arc movement of the lever from causing excessive squeezing pressure on the operator's fingers, greatly improving the operator's comfort.

[0016] At the same time, the elastic member provides a continuous driving force for the lever, so that the lever always keeps close to the rotation center of the traction wheel. This design ensures close contact between the lever and the traction wheel, reduces the gap caused by the lever, and further enhances the operator's control over the endoscope. During long-term operation, this design effectively reduces the operator's sense of instability caused by the gap between the lever and the traction wheel, and improves the consistency and reliability of the operation.

[0017] In summary, this setting is not only ergonomic, but also more in line with the operator's natural finger movement trajectory, thereby greatly improving the operator's comfort. Compared with the arc movement of the lever in traditional endoscopes, the linear movement reduces the squeezing force on the fingers and effectively reduces the fatigue caused by improper operation. Especially in long-term medical operations, the operator can focus more on the operation itself instead of being distracted by discomfort in operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the disassembly structure of some embodiments of the present application; Figure 2 It is a partial schematic diagram for showing the inside of a handle housing in some embodiments of the present application; Figure 3 It is a partial cross-sectional view of some embodiments of the present application for showing the inside of the handle housing Figure 1 ; Figure 4 is a partial schematic diagram for showing a sliding part in some embodiments of the present application; Figure 5 It is a schematic diagram for showing the state of the lever rotation in some embodiments of the present application. Figure 1 ; Figure 6 It is a schematic diagram for showing the state of the lever rotation in some embodiments of the present application. Figure 2 ; Figure 7 is a state schematic diagram for showing the rotation path of the lever in some embodiments of the present application; Figure 8 It is a partial cross-sectional view of some embodiments of the present application for showing the inside of the handle housing Figure 2 ; Fig. 9 It is a schematic diagram of the structure of the endoscope in some embodiments of the present application.

[0020] The markings in the figure are: 100, traction wheel; 110, moving cavity; 111, locking groove; 120, limiting hole; 130, rotation center; 200, handle housing; 210, moving channel; 300, lever; 310, pressing end; 320, stop surface; 400, limit part; 500, sliding portion; 510, sliding support surface; 520, anti-slip portion; 600, elastic part; 700, stopper; 710, insertion hole; 720, guide surface; 730, deformation gap; 800. Insertion part. DETAILED DESCRIPTION

[0021] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0022] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0023] In the related technology, endoscopes, as important tools in modern medicine, are widely used in various diagnostic and treatment procedures, especially in minimally invasive surgery. Its core function is to achieve precise observation and operation of internal organs and tissues through controllable operations. Specifically, in the structural design of the endoscope, the operator controls the rotation of the traction wheel through the lever, thereby adjusting the position of the traction rope, and finally achieving controllable bending of the active bending section of the endoscope insertion part. This design has significant technical advantages, allowing the operator to flexibly move the endoscope in complex anatomical structures, improving the safety and effectiveness of the operation.

[0024] However, in actual use, the applicant has repeatedly observed that operators often feel discomfort when turning the lever. This discomfort not only affects the operator's experience, but may also affect the accuracy and efficiency of the operation to a certain extent. Therefore, understanding the source of this discomfort is of great significance for improving the design of endoscopes and enhancing the operator's experience.

[0025] After in-depth analysis, the applicant found that the operator's discomfort mainly comes from the movement of the lever. In the existing design, the lever is connected to the traction wheel, which can effectively drive the rotation of the traction wheel and then control the position of the traction rope. However, when the operator presses the lever with his thumb and pushes it to move on the operating handle, there are certain physical problems in the actual movement process. Specifically, in the process of driving the traction wheel to rotate, the lever not only moves along a straight line, but also moves in a certain arc around the rotation center of the traction wheel. This arc movement forms a motion interaction with the linear movement of the operator's fingers, resulting in an obvious squeezing touch when the operator presses the lever.

[0026] Further analysis revealed that the root cause of this phenomenon lies in the structural configuration of the lever and the traction wheel. The lever is designed so that it must rotate around the rotation center of the traction wheel during the process of applying force. This movement mode causes the contact part of the lever to generate a large squeezing force when it contacts the operator's fingers. This squeezing force not only causes physical discomfort to the operator, but may also cause finger fatigue and affect the ability to operate for a long time.

[0027] In addition, the arc motion of the lever increases the load on the finger joints. This means that during the operation, the operator's fingers must bear the reaction force from the lever, which can cause pain or fatigue in the fingers. This problem is particularly evident when using the endoscope for a long time. The operator may frequently adjust the grip position due to finger discomfort, which affects the smoothness and stability of the operation.

[0028] In summary, although the lever design of the endoscope has certain technical advantages and can effectively control the position of the traction rope, the existing design exposes significant discomfort problems in actual use, mainly due to the interaction between the movement of the lever and the operator's fingers. In order to solve this problem and improve the operator's experience, it is urgent to optimize the structure of the lever so that it can reduce the discomfort to the operator's fingers while maintaining functionality, thereby improving the overall use effect of the endoscope. Such improvements will bring more humane product design to the medical device industry and improve the accuracy and comfort of medical operations.

[0029] Based on this, the present application provides a matching structure between a shift rod and a traction wheel.

[0030] Please refer to Figure 1 to Figure 9 In some embodiments, the matching structure is applied to the handle of the endoscope, including a traction wheel 100 and a lever 300. The traction wheel 100 is rotatably arranged in the handle housing 200. Exemplarily, the handle housing 200 is a part of the handle, mainly the outer shell of the handle, and the handle housing 200 serves as the installation base of most of the instrument structures of the endoscope. Further, the lever 300 is slidably connected to the traction wheel 100, and the handle housing 200 is provided with a moving channel 210 for the lever 300 to pass through, and the end of the lever 300 located outside the moving channel 210 is a pressing end 310, and the pressing end 310 is used for the operator to press. Exemplarily, the sliding mode of the lever 300 and the traction wheel 100 is sliding along the radial direction of the traction wheel 100.

[0031] Exemplarily, the handle housing 200 has an elongated shape, and one end of the handle housing 200 is connected to the insertion portion 800. The movable channel 210 is disposed at one end of the handle housing 200 away from the insertion portion 800, and the length direction of the movable channel 210 is consistent with the length direction of the handle housing 200.

[0032] At the same time, a limiting portion 400 is provided on one of the handle housing 200 and the lever 300, and a sliding portion 500 is provided on the other of the handle housing 200 and the lever 300. The outer surface of the sliding portion 500 has a sliding support surface 510 that is recessed toward the rotation center 130 side of the traction wheel 100, and at least a portion of the limiting portion 400 is slidably matched with the sliding support surface 510.

[0033] Exemplarily, the limiting portion 400 is disposed on the rod section of the lever 300 located inside the handle housing 200, and the length direction of the limiting portion 400 is perpendicular to the length direction of the lever 300, while the sliding portion 500 is disposed on the inner side wall of the handle housing 200, and the sliding support surface 510 abuts against the sliding portion 500 in the radial direction of the traction wheel 100.

[0034] Exemplarily, the limiting portion 400 is disposed on the inner side wall of the handle housing 200, the extending direction of the limiting portion 400 is toward the side of the lever 300, and the length direction of the limiting portion 400 is perpendicular to the length direction of the lever 300, the sliding portion 500 is disposed on the rod section of the lever 300 located in the handle housing 200, and the sliding support surface 510 abuts against the sliding portion 500 in the radial direction of the traction wheel 100.

[0035] Furthermore, when the limiting portion 400 abuts against the sliding support surface 510 , the limiting portion 400 is located above the sliding support surface 510 , so that when the operator applies pressing force to the pressing end 310 , the limiting portion 400 can be directly pressed against the sliding support surface 510 .

[0036] Exemplarily, the shape of the sliding support surface 510 is a curve, and along the length direction of the handle housing 200, the sliding support surface 510 first gradually bends and extends toward the rotation center 130 of the traction wheel 100, and then gradually bends and extends away from the rotation center 130 of the traction wheel 100. Of course, the shape of the sliding support surface 510 can also be a broken line, and its path direction is roughly the same as the curved shape of the sliding support surface 510. The difference is that the turning point of the broken line sliding support surface 510 is not a smooth transition, but there is an angle. Similarly, the limiting portion 400 is a rod-shaped body, that is, the limiting portion 400 is a rod body with a circular cross-section, which can achieve an effective sliding fit relationship with the sliding support surface 510.

[0037] Furthermore, combined Figure 5 to Figure 7The elastic part 600 is disposed between the traction wheel 100 and the lever 300, and the elastic part 600 drives the lever 300 to always approach the rotation center 130 of the traction wheel 100, so that the limiting part 400 is closely attached to the sliding support surface 510. Further, when the pressing end 310 is moved along the moving channel 210, the limiting part 400 slides along the sliding support surface 510, and causes the lever 300 to slide adaptively in the radial direction of the traction wheel 100, so that the pressing end 310 maintains a linear motion relative to the moving channel 210 during the moving process.

[0038] Exemplarily, the linear motion refers to the linear motion of the pressing end 310 relative to the moving channel 210, specifically, it refers to the process in which the pressing end 310 and the corresponding coincidence point in the moving channel 210 move in the moving channel 210, maintaining the linear motion relative to the moving channel 210. To explain from the side, that is, when the operator's finger pushes the pressing end 310 to move along the moving channel 210, the pressing end 310 and the operator's finger can always maintain a relatively stable motion, so that the pressing end 310 will not apply too much squeezing force to the operator's finger during the movement.

[0039] On this basis, the design and rotation position of the traction wheel 100 are the basis of the present invention. The traction wheel 100 is rotatably arranged inside the handle housing 200, and its structure provides a stable fulcrum to ensure that the force transmission and rotation can remain stable during operation. This design not only enhances the rigidity of the overall device, but also makes the sliding connection of the lever 300 have good support, ensuring that the force during the levering can be effectively converted into the rotation of the traction wheel 100, thereby achieving precise control of the endoscope insertion part 800.

[0040] Finally, the sliding connection between the lever 300 and the traction wheel 100 enables the lever 300 to move smoothly during operation. In this structure, the pressing end 310 at the outer end of the lever 300 is used for the operator to directly press, and this design improves the operator's operating flexibility and accuracy. Especially in an emergency, the operator can quickly and effectively adjust the movement of the endoscope to ensure the timeliness and safety of medical operations.

[0041] At the same time, the matching relationship between the position-limiting portion 400 and the sliding support surface 510 further improves the accuracy of the operation. The sliding support surface 510 is designed to be recessed toward the rotation center 130 of the traction wheel 100, so that the lever 300 can slide along this support surface during operation. This design ensures that the lever 300 remains stable when moving, avoiding discomfort caused by the arc movement of the lever 300. Through this structure, the movement trajectory of the lever 300 is effectively guided, so that the operator can keep the linear movement of the finger consistent with the smooth sliding of the lever 300 during use, thereby significantly reducing the pressure and fatigue on the finger joints. That is, when the position-limiting portion 400 moves on the sliding support surface 510 toward the rotation center 130 of the traction wheel 100, the lever 300 will shrink on the traction wheel 100, and the reaction force that the pressing end 310 would originally apply to the operator's finger will be reduced. Similarly, when the limiting portion 400 moves on the sliding support surface 510 toward the side away from the rotation center 130 of the traction wheel 100, the lever 300 will extend on the traction wheel 100, and the reaction force that the pressing end 310 would originally apply to the operator's finger will also be reduced. This design effectively prevents the arc movement of the lever 300 from causing excessive squeezing force on the operator's fingers, greatly improving the operator's comfort.

[0042] At the same time, the elastic member provides a continuous driving force for the lever 300, so that the lever 300 always keeps close to the rotation center 130 of the traction wheel 100. This design ensures close contact between the lever 300 and the traction wheel 100, reduces the gap caused by the shifting, and further enhances the operator's control over the endoscope. During long-term operation, this design effectively reduces the operator's sense of instability caused by the gap between the lever 300 and the traction wheel 100, and improves the consistency and reliability of the operation.

[0043] In summary, such a setting is not only ergonomic, but also more in line with the natural finger movement trajectory of the operator, thereby greatly improving the comfort of the operator. Compared with the arc movement of the lever 300 in the traditional endoscope, the linear movement reduces the squeezing force on the finger and effectively reduces the fatigue caused by improper operation. Especially in long-term medical operations, the operator can focus more on the operation itself instead of being distracted by discomfort in operation.

[0044] In some embodiments, in combination Figure 3 , Figure 4, both ends of the sliding support surface 510 on the sliding part 500 are provided with anti-slip sub-parts 520, and the side wall of the anti-slip sub-part 520 close to the sliding support surface 510 is smoothly transitioned and connected to the sliding support surface 510. First, the existence of the anti-slip sub-part 520 effectively prevents the limiter 400 from accidentally detaching from the sliding support surface 510 during operation. When the operator pushes the traction wheel 100 to rotate by pressing the lever 300, the movement trajectory of the lever 300 and the applied force will cause the limiter 400 to slide along the sliding support surface 510. If there is no anti-slip sub-part 520, the lever 300 may be detached from the sliding support surface 510 due to the applied external force or improper angle during the movement, thereby affecting the smooth sliding of the lever 300 and the normal operation of the traction wheel 100. The side wall of the anti-fall-off portion 520 is smoothly connected to the sliding support surface 510 , so that the limiting portion 400 is always guided during the sliding process, avoiding the falling-off phenomenon and ensuring that the movement of the lever 300 is more stable.

[0045] At the same time, since the operator needs to frequently adjust the angle and position of the endoscope, the presence of the anti-dropout portion 520 makes the movement of the lever 300 more controllable, reducing uncertainty during the operation. By ensuring the stable movement of the lever 300 on the sliding support surface 510, the operator can focus more on the medical operation itself, thereby improving the accuracy and safety of the operation.

[0046] In some embodiments, in combination Figure 3 , Figure 8 The traction wheel 100 has a moving cavity 110, which is arranged along the radial direction of the traction wheel 100, and a part of the shifting rod 300 is slidably inserted in the moving cavity 110. Exemplarily, the inner diameter of the moving cavity 110 is greater than the outer diameter of the shifting rod 300, and the length of the shifting rod 300 is the length of the moving cavity 110.

[0047] Exemplarily, the end surface of the shifting rod 300 abutting against the inner end wall of the moving cavity 110 is a stop surface 320 , and the stop surface 320 is closer to the rotation center 130 of the traction wheel 100 than the recessed portion of the sliding support surface 510 .

[0048] On this basis, the radial layout of the moving cavity 110 improves the guiding property and stability of the lever 300. When the lever 300 slides in the moving cavity 110, its movement is constrained by the inner wall of the moving cavity 110, which greatly reduces the possibility of lateral shaking and deviation. Compared with other designs, this guiding structure can better maintain the linear movement of the lever 300, avoiding operational errors caused by the instability of the lever 300. At the same time, the design of the stop surface 320 enables the lever 300 to be effectively limited when reaching the maximum stroke. This stop surface 320 is located on the inner end wall of the moving cavity 110, and is closer to the rotation center 130 of the traction wheel 100 than the concave part of the sliding support surface 510. This design ensures that the lever 300 will not cause non-ideal contact with the traction wheel 100 due to excessive sliding during the movement, thereby ensuring that the lever 300 and the traction wheel 100 cooperate more closely and reliably.

[0049] Furthermore, when the lever 300 moves to the inner bottom wall in the moving cavity 110, the limiting portion 400 can move on the sliding support surface 510 to the recessed portion of the sliding support surface 510. This configuration can not only prevent the lever 300 from being damaged due to excessive movement, but also ensure that the limiting portion 400 moves normally on the sliding support surface 510 when the lever 300 slides within the moving range of the moving cavity 110.

[0050] In some embodiments, Figure 3 , Figure 8 As shown, a stop groove 111 is provided at one end of the movable cavity 110 away from the rotation center 130 of the traction wheel 100, and a stop portion 700 is embedded in the stop groove 111, and the stop portion 700 is slidably matched with the shifting rod 300. Exemplarily, the outer diameter of the stop portion 700 is larger than the inner diameter of the stop groove 111, and the stop portion 700 can be interference-fitted with the stop groove 111 when the stop portion 700 itself is elastically deformed. Further, the elastic portion 600 is located in the movable cavity 110, and one end of the elastic portion 600 is stopped against the stop portion 700, and the other end is stopped against the shifting rod 300. Exemplarily, the elastic portion 600 is a spring.

[0051] Exemplarily, a stop portion is provided at the end of the lever 300 away from the pressing end 310, and the stop surface 320 is located at the lower end surface of the stop portion. The outer diameter of the stop portion is larger than the outer diameter of the lever 300 and smaller than the inner diameter of the movable cavity 110. In this way, when the lever 300 moves out of the movable cavity 110 along the length direction of the movable cavity 110, the stop portion will interfere with the locking portion 700, thereby effectively preventing the lever 300 from falling off from the movable cavity 110.

[0052] On this basis, the setting of the locking portion 700 effectively prevents the lever 300 from falling off from the moving cavity 110. In actual use, the lever 300 needs to be precisely matched with the traction wheel 100, and any looseness or falling off will affect the stability and safety of the operation. By designing the outer diameter of the locking portion 700 to be larger than the inner diameter of the locking groove 111, an interference fit is achieved to ensure that the lever 300 is firmly fixed in the moving cavity 110. This design greatly improves the safety of the lever 300, allowing the operator to operate with peace of mind without worrying about accidents caused by the lever 300 falling off.

[0053] Secondly, the stopper 700 provides a support point for elastic compression of the elastic part 600, so that the elastic part 600 can achieve normal elastic compression. The design of the elastic part 600 is intended to provide the necessary return force for the lever 300 to ensure that after the operator releases the lever 300, the lever 300 can quickly return to the original position, that is, the limiter 400 can always be in close contact with the sliding support surface 510. The existence of the stopper 700 provides a stable support point for the compression and release of the elastic part 600, thereby improving the reliability and reaction sensitivity of the overall structure. This design effectively avoids the functional failure of the elastic part 600 due to lack of support, and ensures the smooth operation and rapid recovery of the lever 300.

[0054] In some embodiments, Figure 3 , Figure 8 As shown, the locking portion 700 is provided with a plug hole 710 for the lever 300 to pass through, and the inner diameter of the plug hole 710 is larger than the outer diameter of the lever 300. Further, the locking portion 700 is also provided with a deformation gap 730 connected with the plug hole 710, and the locking portion 700 can be elastically contracted at the deformation gap 730 under the extrusion of the locking groove 111. Exemplarily, when the locking portion 700 is extruded by the locking groove 111, the inner diameter of the plug hole 710 still remains larger than the outer diameter of the lever 300, so that the lever 300 can still slide freely in the plug hole 710 of the locking portion 700 when the locking portion 700 is stably embedded in the locking groove 111, thereby effectively avoiding the jamming phenomenon caused by the friction between the lever 300 and the locking portion 700 during operation, thereby ensuring the smooth operation of the lever 300.

[0055] At the same time, the design of the deformation gap 730 allows the stopper 700 to undergo elastic contraction when squeezed by the stopper groove 111, and then be stably embedded in the stopper groove 111. This feature allows the stopper 700 to adapt to the squeezing force during installation in the stopper groove 111, ensuring that the matching relationship between the stopper groove 111 and the stopper 700 is always maintained in a good manner during the installation process. Since the stopper 700 can be elastically deformed, this dynamic response characteristic not only enhances the durability of the entire structure, but also improves the system's ability to adapt to changes in operating loads. Even under high-intensity use conditions, the normal operation of the lever 300 will not be affected, further improving the reliability of the device.

[0056] In some embodiments, reference Figure 3 , Figure 8 The stopper 700 also has a guide surface 720, which is used to slide with the inner wall of the moving cavity 110 to apply a squeezing force to the deformation gap 730. Exemplarily, the guide surface 720 gradually extends in an arc shape from bottom to top toward the inner wall of the moving cavity 110, that is, when observed from bottom to top along the length direction of the moving cavity 110, the width of the stopper 700 at the lowest point of the guide surface 720 is the smallest, and then gradually increases.

[0057] In this way, when the locking portion 700 slides with the inner wall of the moving cavity 110 through the guide surface 720, an effective extrusion fit can be formed in the process of entering the locking groove 111. This extrusion effect not only promotes the contraction of the locking portion 700 toward the deformation gap 730 side, but also ensures the fastening degree of the locking portion 700 in the locking groove 111.

[0058] In addition, the application of the squeezing force enables the stopper 700 to self-adjust when subjected to force, thereby adapting to the requirements of different operating loads. Through the squeezing force provided by the guide surface 720, the stopper 700 can be fine-tuned to a certain extent to adapt to various changes in the force applied during use. This adaptability not only improves the operating experience of the lever 300, allowing the operator to feel smoother feedback when adjusting the lever 300, but also reduces the discomfort caused by the excessive rigidity of the fixing component.

[0059] Exemplarily, a flange is provided near the opening of the locking groove 111. After the locking portion 700 is fully embedded in the locking groove 111, the top of the guide surface 720 will abut against the flange, so that the locking portion 700 cannot fall out after being embedded in the locking groove 111, thereby achieving irreversible locking installation.

[0060] In some embodiments, in combination Figure 2 , Figure 3, the traction wheel 100 is provided with a limiting hole 120, and the limiting part 400 extends from the movable cavity 110 through the limiting hole 120 to the sliding support surface 510, and the extension direction of the limiting hole 120 is consistent with the extension direction of the movable cavity 110. In this way, the setting of the limiting hole 120 can effectively guide the movement of the limiting part 400 in the sliding groove. Since the limiting hole 120 and the movable cavity 110 extend in the same direction, this consistency ensures the stability of the limiting part 400 when the lever 300 is toggled. During operation, the limiting part 400 can move smoothly along the set path, avoiding deviation or jamming due to inconsistent directions. This design not only improves the smoothness of operation, but also ensures consistency at all angles and directions, thereby further improving the operator's control accuracy of the endoscope.

[0061] Secondly, the matching structure of the limit hole 120 and the sliding groove also improves safety. During operation, the movement of the limit part 400 is always restricted, thereby avoiding excessive movement due to accidental operation and ensuring the stability and safety of the endoscope in complex environments. This design provides greater protection for medical operations and reduces the dependence on the operator's skill level, so that even inexperienced operators can use the endoscope safely and effectively.

[0062] For example, in order to facilitate the assembly of the traction wheel 100 and the lever 300, the traction wheel 100 is formed by splicing two traction branches, that is, after the lever 300 is installed in place, the two traction branches are spliced ​​together to achieve the assembly of the lever 300 and the traction wheel 100. For example, the two traction branches can be snap-fitted or bonded.

[0063] Please refer to Figure 1 to Figure 9 The present application also provides a handle for use with an endoscope, comprising a matching structure of the lever 300 and the traction wheel 100 in any of the above-mentioned solutions.

[0064] Please refer to Figure 1 to Figure 9 The present application also provides an endoscope, comprising an insertion portion 800 and the handle in the above-mentioned scheme, and the insertion portion 800 is arranged at the distal end of the handle.

[0065] The endoscope has the same or corresponding technical features as the aforementioned insertion part, and can achieve the same or corresponding technical effects. At the same time, the endoscope of the embodiment of the present application can be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a rhinoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc. The embodiment of the present application does not specifically limit the type of the endoscope.

[0066] The above description is only a specific implementation mode 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 covered by the protection scope of the present invention.

Claims

1. A matching structure of a lever and a traction wheel, applied to a handle of an endoscope, characterized in that: include: A traction wheel (100) rotatably disposed in the handle housing (200); A lever (300) is slidably connected to the traction wheel (100); the handle housing (200) is provided with a moving channel (210) for the lever (300) to pass through; an end of the lever (300) located outside the moving channel (210) is a pressing end (310); and the pressing end (310) is used for being pressed by an operator; A limiting portion (400) is provided on one of the handle housing (200) and the shifting rod (300), and a sliding portion (500) is provided on the other of the handle housing (200) and the shifting rod (300), wherein the outer surface of the sliding portion (500) has a sliding support surface (510) that is recessed toward the rotation center (130) of the traction wheel (100), and at least a portion of the limiting portion (400) is in sliding cooperation with the sliding support surface (510); The elastic part (600) is disposed between the traction wheel (100) and the shifting rod (300), and the elastic part (600) drives the shifting rod (300) to always move closer to the rotation center (130) of the traction wheel (100), so that the limiting part (400) is closely attached to the sliding support surface (510), wherein: When the pressing end (310) is moved along the moving channel (210), the limiting portion (400) slides along the sliding support surface (510) and causes the shifting rod (300) to slide adaptively in the radial direction of the traction wheel (100), so that the pressing end (310) maintains linear motion relative to the moving channel (210) during the shifting process.

2. The matching structure of the lever and the traction wheel according to claim 1, characterized in that: Anti-slipping parts (520) are provided on both ends of the sliding support surface (510) on the sliding part (500), and a side wall surface of the anti-slipping part (520) close to the sliding support surface (510) is smoothly transitionally connected to the sliding support surface (510).

3. The matching structure of the lever and the traction wheel according to claim 1, characterized in that: The traction wheel (100) has a movable cavity (110), the movable cavity (110) is arranged along the radial direction of the traction wheel (100), and a part of the shifting rod (300) is slidably inserted in the movable cavity (110).

4. The matching structure of the lever and the traction wheel according to claim 3, characterized in that: The end surface of the shifting rod (300) abutting against the inner end wall of the moving cavity (110) is a stop surface (320), and the stop surface (320) is closer to the rotation center (130) of the traction wheel (100) than the recessed part of the sliding support surface (510).

5. The matching structure of the lever and the traction wheel according to claim 4, characterized in that: A locking groove (111) is provided at one end of the movable cavity (110) away from the rotation center (130) of the traction wheel (100), a locking portion (700) is embedded in the locking groove (111), the locking portion (700) is slidably matched with the shifting rod (300), the outer diameter of the locking portion (700) is larger than the inner diameter of the locking groove (111), and the locking portion (700) can be interference-fitted with the locking groove (111) when the locking portion (700) itself is elastically deformed; The elastic part (600) is located in the movable cavity (110), and one end of the elastic part (600) abuts against the locking part (700), and the other end abuts against the shifting rod (300).

6. The matching structure of the lever and the traction wheel according to claim 5, characterized in that: The locking portion (700) is provided with an insertion hole (710) for the lever (300) to pass through, and the inner diameter of the insertion hole (710) is larger than the outer diameter of the lever (300); The locking portion (700) is further provided with a deformation gap (730) communicating with the insertion hole (710), and the locking portion (700) can elastically contract at the deformation gap (730) under the squeezing action of the locking groove (111).

7. The matching structure of the lever and the traction wheel according to claim 6, characterized in that: The locking portion (700) further comprises a guide surface (720), and the guide surface (720) is used to slide with the inner wall of the moving cavity (110) to apply a squeezing force to the side of the deformation gap (730).

8. The matching structure of the shifting lever and the traction wheel according to any one of claims 3 to 7, characterized in that: The traction wheel (100) is provided with a limiting hole (120), the limiting portion (400) extends from the moving cavity (110) through the limiting hole (120) to the sliding support surface (510), and the extending direction of the limiting hole (120) is consistent with the extending direction of the moving cavity (110).

9. A handle, applied to an endoscope, characterized in that: The invention comprises the matching structure of the shifting rod and the traction wheel as described in any one of claims 1 to 8.

10. An endoscope, characterized in that: It comprises an insertion portion (800) and the handle according to claim 8, and the insertion portion (800) is arranged at the distal end of the handle.

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