A matching structure of a lever and a traction wheel, a handle and an endoscope

Abstract

The present invention provides a matching structure of a lever and a traction wheel, a handle and an endoscope, and relates to the technical field of endoscopes. The matching structure of the present invention comprises a traction wheel, which is rotatably arranged in a handle housing; a lever, which is slidably connected to the traction wheel, and the handle housing is provided with a moving channel for the lever to pass through; a limiting portion is provided in one of the handle housing and the lever, and a sliding portion is provided in the other of the handle housing and the lever, and the sliding portion has a sliding groove recessed toward the rotation center side of the traction wheel, and at least part of the limiting portion is slidably embedded in the sliding groove, wherein, when the pressing end is moved along the moving channel, the limiting portion slides along the sliding groove and causes 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. Compared with the prior art, the present invention has the advantage of improving the finger comfort of the operator when moving the lever.

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 improve the comfort of the operator's fingers when shifting 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:

[0006] The lever is configured to move along the guide rail, the guide rail being arranged on the movable surface of the wheel hub, and the lever being arranged on the movable surface of the wheel hub to move along the guide rail.

[0007] Preferably, the width of the sliding groove is matched with the outer diameter of the limiting portion.

[0008] Preferably, the limiting portion is rotatably provided with a rolling sub-portion, and the rolling sub-portion is in rolling cooperation with the sliding groove.

[0009] Preferably, the sliding groove has two ends and a middle portion, and in the process of the limiting portion moving from the ends of the sliding groove to the middle portion, the distance from the rotation center of the traction wheel gradually decreases; and / or the concave portion of the sliding groove is closer to the rotation center of the traction wheel than the rest of the sliding groove.

[0010] Preferably, the maximum straight-line distance between the limiting portion and the rotation center of the traction wheel is smaller than the radius of the traction wheel; or the maximum straight-line distance between the sliding groove and the rotation center of the traction wheel is smaller than the radius of the traction wheel.

[0011] Preferably, the traction wheel has a movable cavity, the movable cavity is arranged along the radial direction of the traction wheel, and at least a part of the shifting rod is slidably inserted in the movable cavity.

[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 groove, and the extending direction of the limiting hole is consistent with the extending direction of the movable cavity.

[0013] Preferably, the lever has a rotation-stopping portion, the rotation-stopping portion has at least one outer plane, the movable cavity has at least one inner plane, and the outer plane is arranged opposite to and in close contact with the inner plane.

[0014] In a second aspect, the present application provides a handle, which adopts the following technical solution:

[0015] A handle, applied to an endoscope, comprises a matching structure of a lever and a traction wheel as described in the above technical solution.

[0016] In a third aspect, the present application further provides an endoscope, comprising an insertion portion and the handle described in the above scheme, and the insertion portion is arranged at the distal end of the handle.

[0017] The present invention has the following advantages and beneficial effects:

[0018] When the pressing end is toggled, the mechanism of the limiter sliding along the sliding groove causes the lever to slide adaptively in the radial direction of the traction wheel. Through this adaptive sliding, the lever can adjust its position relatively smoothly, reducing the squeezing force caused by the arc movement. More importantly, this design ensures that the pressing end can maintain linear motion relative to the moving channel during the toggling process. The linear motion relative to the moving channel means that the operator's fingers will not be subjected to additional squeezing force, which significantly improves the comfort of operation.

[0019] At the same time, by optimizing the matching structure of the lever and the traction wheel, the squeezing force generated during operation is reduced, and the operator's tactile experience is improved. This change can not only improve the operator's comfort during long-term operation and reduce finger fatigue, but also improve the stability and accuracy of operation.

[0020] In summary, the matching structure of the lever and the traction wheel of the present invention fundamentally improves the comfort of the endoscope during use. By reducing the squeezing feeling of the operator when using the lever, the operator can maintain a high level of comfort during long-term operation, thereby improving the overall operating experience. This not only provides safer and more stable conditions for medical operations, but also lays the foundation for the user experience of endoscope equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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.

[0022] Figure 1 It is a schematic diagram of the disassembly structure of some embodiments of the present application;

[0023] Figure 2 yes Figure 1 A local enlarged schematic diagram in FIG.

[0024] Figure 3 yes Figure 1 A partial enlarged cross-section of Figure 1 ;

[0025] Figure 4 It is a schematic diagram for showing the state of the lever rotation in some embodiments of the present application. Figure 1 ;

[0026] Figure 5 It is a schematic diagram for showing the state of the lever rotation in some embodiments of the present application. Figure 2 ;

[0027] Figure 6 is a schematic diagram for showing the movement path of the lever in some embodiments of the present application;

[0028] Figure 7 yes Figure 1 A partial enlarged cross-section of Figure 2 ;

[0029] Figure 8 It is a schematic diagram of the structure of the endoscope in some embodiments of the present application.

[0030] The markings in the figure are:

[0031] 100, traction wheel; 110, moving cavity; 111, inner plane; 120, limiting hole; 130, rotation center;

[0032] 200, handle housing; 210, moving channel;

[0033] 300, lever; 310, pressing end; 320, anti-rotation part; 321, outer plane;

[0034] 400, limiting part; 410, rolling part;

[0035] 500, sliding portion; 510, sliding groove;

[0036] 600. Insertion part. DETAILED DESCRIPTION

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] Based on this, the present application provides a matching structure between a shift rod and a traction wheel.

[0046] Please refer to Figure 1 to Figure 8In 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.

[0047] Exemplarily, the handle housing 200 has an elongated shape, and one end of the handle housing 200 is connected to the insertion portion 600. The movable channel 210 is disposed at one end of the handle housing 200 away from the insertion portion 600, and the length direction of the movable channel 210 is consistent with the length direction of the handle housing 200.

[0048] 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 sliding portion 500 has a sliding groove 510 recessed toward the rotation center 130 side of the traction wheel 100, and at least a portion of the limiting portion 400 is slidably embedded in the sliding groove 510.

[0049] 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 wall of the handle housing 200, and the sliding groove 510 is opened on the side of the sliding portion 500 facing the limiting portion 400.

[0050] Exemplarily, the limiting portion 400 is disposed on the inner 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 groove 510 is opened on the side of the sliding portion 500 facing the limiting portion 400.

[0051] In some embodiments, the shape of the sliding groove 510 is a curve, and along the length direction of the handle housing 200, the sliding groove 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 groove 510 can also be a broken line, and its path direction is roughly the same as the curved shape of the sliding groove 510, the difference is that the turning point of the broken line sliding groove 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 groove 510.

[0052] Furthermore, when the pressing end 310 is moved along the moving channel 210, the limiting portion 400 slides along the sliding groove 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. 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 linear motion of the pressing end 310 relative to the moving channel 210 during the movement of the corresponding coincidence point of the pressing end 310 in 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.

[0053] On this basis, the pressing end 310 of the lever 300 is designed to be pressed by the operator, and through the sliding connection with the traction wheel 100, the lever 300 can directly drive the traction wheel 100 to rotate when pressed. This direct driving method not only simplifies the operation process, but also greatly reduces the operator's squeezing feeling when pushing the lever 300, allowing the operator to operate more comfortably. Secondly, under the coordinated cooperation of the limiting part 400 and the sliding part 500, it can be ensured that the lever 300 will not deviate from the preset range of motion during the shifting process. The limiting part 400 is embedded in the sliding groove 510, so that it slides along the sliding groove 510 when shifting, thereby prompting the lever 300 to slide adaptively in the radial direction of the traction wheel 100. That is, when the limiting portion 400 moves in the sliding groove 510 toward the rotation center 130 side 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 in the sliding groove 510 toward the rotation center 130 side away from 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.

[0054] In some embodiments, Figure 3 As shown, the width of the sliding groove 510 is matched with the outer diameter of the limiting portion 400. Such a matching design helps the limiting portion 400 to move stably in the sliding groove 510, ensuring that the movement range of the lever 300 is effectively controlled. This design avoids the unstable movement of the lever 300 due to the offset during sliding, thereby preventing operational errors caused by improper toggling. Exemplarily, the sliding groove 510 is sealed at both ends of its own extension direction, and the curvature of the sealing part of the sliding groove 510 is matched with the outer curvature of the limiting portion 400, so that the limiting portion 400 can be prevented from being separated from the sliding groove 510 during the movement in the sliding groove 510.

[0055] In some embodiments, in combination Figure 3, the limit part 400 is rotatably provided with a rolling sub-part 410, and the rolling sub-part 410 is rolling-matched with the sliding groove 510. Exemplarily, the cross-sectional shape of the rolling sub-part 410 is circular, and the outer diameter of the rolling sub-part 410 is the same as the groove width of the sliding groove 510. On this basis, the setting of the rolling sub-part 410 makes the movement of the limit part 400 in the sliding groove 510 smoother. Compared with the traditional sliding match, the rolling match can significantly reduce the friction resistance. This improvement greatly reduces the force required by the finger when operating the lever 300, especially in the case of frequent shifting, greatly improving the operator's experience. By reducing the resistance, the operator can more easily control the lever 300, thereby realizing precise control of the traction wheel 100. This smooth operation process not only improves work efficiency, but also reduces the discomfort caused by finger fatigue.

[0056] Secondly, the existence of the rolling sub-section 410 also improves the stability of the limiting section 400. Through the rolling cooperation with the sliding groove 510, the limiting section 400 is not easy to deviate or shake during the movement, and this stability further ensures the accurate movement trajectory of the lever 300. This feature is very important for the use of endoscopes, because in medical operations, any slight mistake may lead to serious consequences. Therefore, improving the accuracy and stability of movement can effectively reduce the operation risk and ensure the smooth progress of the medical procedure.

[0057] Finally, the presence of the rolling subsection 410 also improves the maintenance and service life of the device. Since the rolling fit greatly reduces wear, the service life of the endoscope can be extended, reducing the frequency of maintenance and replacement, which also has a positive impact on the overall cost of use.

[0058] In some embodiments, Figure 3 As shown, the sliding groove 510 has two ends and a middle part, and the distance between the limiting part 400 and the rotation center 130 of the traction wheel 100 gradually decreases during the process of moving from the end to the middle part of the sliding groove 510. And / or, the concave part of the sliding groove 510 is closer to the rotation center 130 of the traction wheel 100 than the rest of the sliding groove 510. Exemplarily, the corresponding moving channel 210 is protruded to the side opposite to the sliding groove 510 in the length direction of the handle housing 200. Exemplarily, the two ends of the sliding groove 510 are respectively a first end and a second end.

[0059] At the same time, the traction wheel 100 has a movable cavity 110 , which is arranged along the radial direction of the traction wheel 100 , and at least a part of the shifting rod 300 is slidably inserted in the movable cavity 110 .

[0060] On this basis, please combine Figures 4 to 6When at least a portion of the position-limiting portion 400 moves from the first end portion to the second end portion in the sliding groove 510, since the sliding groove 510 is in a shape that is concave toward the rotation center 130 of the traction wheel 100, and the position-limiting portion 400 moves from the first end portion to the middle portion of the sliding groove 510, the position-limiting portion 400 will drive the lever 300 to move toward the rotation center 130 of the traction wheel 100 along the length direction of the moving cavity 110 within this distance.

[0061] When at least a portion of the limiting portion 400 moves from the middle portion to the second end portion in the sliding groove 510, since the sliding groove 510 is arc-shaped and within this distance, the distance from the rotation center 130 of the traction wheel 100 will become farther and farther, the limiting portion 400 will drive the lever 300 to move along the length direction of the moving cavity 110 within this distance toward the side away from the rotation center 130 of the traction wheel 100.

[0062] Therefore, in this case, when the operator's finger pushes the pressing end 310 along the length direction of the moving channel 210, the limiting portion 400 on the lever 300 will move along the extension path of the sliding groove 510, and in this process, the lever 300 will undergo two position changes. The first is that when it moves from the first end to the middle, the lever 300 will gradually shrink into the traction wheel 100, that is, shorten. The second is that when it moves from the middle to the second end, the lever 300 will gradually move out of the traction wheel 100, that is, extend. However, since the lever 300 also rotates around the rotation center 130 with the traction wheel 100, in the process of pushing the pressing end 310 to move the limiting portion 400 from the first end to the second end of the sliding groove 510, the pressing end 310 in contact with the operator's finger will always maintain a linear motion relative to the moving channel 210, and the pressing end 310 at this time will not apply too much squeezing force to the operator's finger, thereby effectively improving the operator's comfort when moving the lever 300.

[0063] It is worth noting that the lever 300 has another advantage in that when the operator's finger presses the pressing end 310 downward along the length direction of the lever 300, due to the cooperation between the limiter 400 and the sliding groove 510, the lever 300 does not slide, but maintains the current position when subjected to the pressing force along its own axial direction, which can greatly improve the stability of the lever 300 and avoid the lever 300 from rotating uncontrollably when not in use. Similarly, the lever 300 will slide only when the operator's finger applies a thrust along its own radial direction to the lever 300, thereby greatly improving the single operability and stability of the lever 300. In other words, except for the radial thrust, the lever 300 is not easy to slide when other external forces are applied to the lever 300, which makes it easier to avoid other uncontrollable factors caused by accidental touch, which is also an excellent effect of the lever 300 suitable for clinical use.

[0064] In some embodiments, reference Figure 3 , the maximum straight-line distance between the limiting portion 400 and the rotation center 130 of the traction wheel 100 is smaller than the radius of the traction wheel 100 ; or, the maximum straight-line distance between the sliding groove 510 and the rotation center 130 of the traction wheel 100 is smaller than the radius of the traction wheel 100 .

[0065] This arrangement ensures that when the operator moves the lever 300, the positions of the limiter 400 and the sliding slot 510 are always kept within the working range of the traction wheel 100. By limiting the maximum distance between the limiter 400 and the rotation center 130, the movement of the lever 300 will not exceed the effective control area of ​​the traction wheel 100. This arrangement avoids operational errors caused by excessive movement of the lever 300, ensures the stability and accuracy of the endoscope in complex operations, and effectively reduces the risks that may occur in medical operations.

[0066] Secondly, the maximum straight-line distance in the design is less than the radius of the traction wheel 100, which promotes the effective transmission of force. Within this range, the force applied by the operator is more easily converted into effective movement by the traction wheel 100, reducing the attenuation of force caused by the long distance. This design not only enhances the sensitivity of the operation, allowing the operator to obtain more immediate feedback when adjusting the endoscope, but also improves the responsiveness to subtle movements, thereby improving the overall control experience.

[0067] Finally, the design also has an important impact on the comfort of the operator. Due to the design range of the limiter 400 and the sliding groove 510, the operator does not need to exert excessive force when operating the lever 300, reducing fatigue and discomfort of the finger joints. In this way, the continuity and stability of the operation are guaranteed, and the operator can operate for a long time more easily and freely, improving the ergonomic experience of the endoscope in actual use.

[0068] In some embodiments, in combination Figure 2 , the traction wheel 100 is provided with a limiting hole 120, and the limiting part 400 extends from the movable cavity 110 to the sliding groove 510 through the limiting hole 120, 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 510. 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.

[0069] Secondly, the matching structure of the limiting hole 120 and the sliding groove 510 also improves safety. During operation, the movement of the limiting 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.

[0070] Illustratively, along the length direction of the movable cavity 110 , the distance from the end to the middle of the sliding groove 510 is less than the length of the limiting hole 120 , so that the limiting portion 400 can move normally in the sliding groove 510 while passing through the limiting hole 120 .

[0071] In some embodiments, Figure 7As shown, the lever 300 has a stopper 320, the stopper 320 has at least one outer plane 321, the movable cavity 110 has at least one inner plane 111, and the outer plane 321 is arranged to be aligned with the inner plane 111. On this basis, the design of the stopper 320 effectively prevents the lever 300 from accidentally rotating during operation. By arranging the outer plane 321 to be aligned with the inner plane 111, the stopper 320 forms a mechanical barrier, which effectively limits the rotational freedom of the lever 300. This means that when the operator moves the lever 300, he can get clearer feedback, thereby improving the controllability and accuracy of the operation. It avoids unclear direction or misoperation caused by the rotation of the lever 300 during use, ensuring that the operation of the endoscope is more stable and reliable.

[0072] Secondly, the fitting structure of the anti-rotation part 320 helps to improve the comfort during operation. By providing a tight fit, the operator can better feel the movement of the lever 300 when using the lever 300. This design reduces the squeezing feeling caused by the shaking or instability of the lever 300, thereby improving the operator's experience, especially reducing the fatigue of the hand when operating the endoscope for a long time.

[0073] Furthermore, this structural design also has a certain degree of safety. Due to the presence of the anti-rotation portion 320, the lever 300 can be effectively prevented from being moved unnecessarily due to unexpected forces, thereby reducing the risk of misoperation. Especially in a medical environment, the accuracy of operation is directly related to the safety of the patient, and the design of the anti-rotation portion 320 provides a higher safety guarantee for the operation of the endoscope.

[0074] Please refer to Figure 1 to Figure 8 The present application also provides a handle for use with an endoscope, comprising a matching structure of a lever and a traction wheel in any of the above-mentioned solutions.

[0075] Please refer to Figure 1 to Figure 8 The present application also provides an endoscope, comprising an insertion portion 600 and the handle in the above-mentioned scheme, and the insertion portion 600 is arranged at the distal end of the handle.

[0076] 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.

[0077] 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 lever (300), and a sliding portion (500) is provided on the other of the handle housing (200) and the lever (300), wherein the sliding portion (500) has a sliding groove (510) recessed toward the rotation center (130) of the traction wheel (100), and at least a portion of the limiting portion (400) is slidably embedded in the sliding groove (510), wherein: When the pressing end (310) is moved along the moving channel (210), the limiting portion (400) slides along the sliding groove (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 linear motion relative to the moving channel (210) during the moving process; The sliding groove (510) has two end portions and a middle portion, and in the process of the limiting portion (400) moving from the end portions to the middle portion of the sliding groove (510), the distance from the rotation center (130) of the traction wheel (100) gradually decreases; and / or the concave portion of the sliding groove (510) is closer to the rotation center (130) of the traction wheel (100) than the rest of the sliding groove (510).

2. The matching structure of the lever and the traction wheel according to claim 1, characterized in that: The groove width of the sliding groove (510) is adapted to the outer diameter of the limiting portion (400).

3. The matching structure of the lever and the traction wheel according to claim 2, characterized in that: The limiting portion (400) is rotatably provided with a rolling sub-portion (410), and the rolling sub-portion (410) is in rolling cooperation with the sliding groove (510).

4. The matching structure of the lever and the traction wheel according to claim 1, characterized in that: The maximum straight-line distance between the limiting portion (400) and the rotation center (130) of the traction wheel (100) is smaller than the radius of the traction wheel (100); Alternatively, the maximum straight-line distance between the sliding groove (510) and the rotation center (130) of the traction wheel (100) is smaller than the radius of the traction wheel (100).

5. The matching structure of the shifting lever and the traction wheel according to any one of claims 1 to 4, 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 at least a part of the shifting rod (300) is slidably inserted in the movable cavity (110).

6. The matching structure of the lever and the traction wheel according to claim 5, 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 groove (510), and the extending direction of the limiting hole (120) is consistent with the extending direction of the moving cavity (110).

7. The matching structure of the lever and the traction wheel according to claim 5, characterized in that: The lever (300) has a rotation-stopping portion (320), the rotation-stopping portion (320) has at least one outer plane (321), the movable cavity (110) has at least one inner plane (111), and the outer plane (321) is arranged opposite to and in close contact with the inner plane (111).

8. 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 7.

9. An endoscope, characterized in that: It comprises an insertion portion (600) and the handle according to claim 8, and the insertion portion (600) is arranged at the distal end of the handle.

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