Traction wheel locking mechanism, endoscope handle, and endoscope

Abstract

The present invention provides a traction wheel locking mechanism, an endoscope handle, and an endoscope, and pertains to the technical field of endoscopes. The locking mechanism comprises a housing, a traction wheel, and a shielding structure, wherein: the traction wheel is rotatably mounted inside the housing; the housing is provided with an operating hole configured for an operating rod connected to the traction wheel to pass through; the shielding structure is fixed to the housing and is arranged corresponding to the operating hole, and the shielding structure is configured for shielding a gap between the housing and the traction wheel. The locking mechanism is configured such that, in at least part of the rotation travel of the traction wheel, the shielding structure can be pressed against the surface of the traction wheel to achieve damped self-locking of the traction wheel. By means of the shielding structure arranged in coordination with the traction wheel, the present application enables the shielding structure to combine the function of obstructing the view and the function of locking the traction wheel, simplifying the structure of the traction wheel locking mechanism, so that the cost of the endoscope is significantly reduced, the corresponding assembly process is simpler, and the assembly efficiency is higher.

Description

A traction wheel locking mechanism, an endoscope handle, and an endoscope. Technical Field

[0001] This invention belongs to the field of endoscope technology, specifically relating to a traction wheel locking mechanism, an endoscope handle, and an endoscope. Background Technology

[0002] Endoscopes are widely used in modern medicine. They consist of a handle and an insertion section. The handle is equipped with a traction wheel, which is connected to a curved tube at the distal end of the insertion section via a traction rope. By rotating the traction wheel, the bending of the curved tube is controlled by the pulling effect of the traction rope. The camera module at the distal end of the curved tube is used to acquire image information of the lesion site.

[0003] The endoscope handle also includes a locking mechanism to lock the position of the traction wheel, preventing it from rotating and maintaining the curved tube at a preset bending angle, making it easier for the operator to use the endoscope. However, the locking mechanism in the existing technology is relatively complex, the assembly process is cumbersome, and the manufacturing cost is high. Summary of the Invention

[0004] The purpose of this application is to provide a traction wheel locking mechanism, an endoscope handle, and an endoscope to solve the aforementioned technical problems existing in the prior art.

[0005] This application is implemented as follows:

[0006] In a first aspect, embodiments of this application provide a traction wheel locking mechanism for use in an endoscope, comprising a housing, a traction wheel, and a blocking structure, wherein: the traction wheel is rotatably mounted inside the housing, the housing is provided with an operating hole for a lever connected to the traction wheel to pass through, the blocking structure is fixed to the housing and is provided corresponding to the operating hole, the blocking structure is used to block the gap between the housing and the traction wheel; the locking mechanism is configured such that, during at least a portion of the rotational stroke of the traction wheel, the blocking structure can press against the surface of the traction wheel to achieve damping self-locking of the traction wheel.

[0007] Secondly, embodiments of this application provide an endoscope handle, including the traction wheel locking mechanism provided in the first aspect embodiment.

[0008] Thirdly, this application provides an endoscope, including the endoscope handle provided in the second aspect embodiment.

[0009] The technical solution adopted in this invention can achieve the following beneficial effects:

[0010] In this application, a shielding structure is fixed to the housing and positioned corresponding to the operating hole. The shielding structure blocks the gap between the housing and the traction wheel, thereby blocking the view from the outside through the operating hole towards the inside of the housing, preventing direct observation of the internal structure from the outside. Simultaneously, based on the shielding structure, the shielding structure presses against the traction wheel to achieve damping self-locking of the traction wheel. This allows the shielding structure to simultaneously block the view and lock the traction wheel, simplifying the structure of the traction wheel locking mechanism, significantly reducing the cost of the endoscope, and making the assembly process simpler and more efficient. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 is a first-view structural schematic diagram of the locking mechanism provided in some embodiments of this application;

[0013] Figure 2 is a detailed view of section A of Figure 1 in this application;

[0014] Figure 3 is a structural schematic diagram of the locking mechanism provided in some embodiments of this application from a second perspective;

[0015] Figure 4 is a detailed view of section B of Figure 3 in this application;

[0016] Figure 5 is a partial cross-sectional view of the housing provided in some embodiments of this application;

[0017] Figure 6 is a detailed view of section C of Figure 5 in this application;

[0018] Figure 7 is a first-view structural schematic diagram of a portion of the housing provided in some embodiments of this application;

[0019] Figure 8 is a structural schematic diagram of a portion of the housing provided in some embodiments of this application from a second perspective;

[0020] Figure 9 is a schematic diagram of the structure of a traction wheel provided in some embodiments of this application.

[0021] In the diagram: 100-Housing, 110-First housing, 120-Second housing, 130-Operating hole, 200-Traction wheel, 210-Placement structure, 211-Accommodation space, 220-Connecting part, 300-Shielding structure, 310-First sub-part, 311-Snap-fit ​​groove, 320-Second sub-part, 330-Mating surface, 340-First shielding section, 350-Second shielding section, 400-Damping structure, 500-Lever. Detailed Implementation

[0022] The following description provides many different embodiments or examples for implementing various features of the invention. The elements and arrangements described in the specific examples below are only for concise expression of the invention and are merely examples, not intended to limit the invention.

[0023] It should be noted that in the various embodiments of this application, "proximal end" and "distal end" refer to the position of the endoscope and its accessories relative to the user in the usage environment. The end closer to the user is designated as the "proximal end", and the end farther from the user is designated as the "distal end".

[0024] This application provides a traction wheel locking mechanism for an endoscope, comprising a housing 100, a traction wheel 200, and a shielding structure 300, as shown in Figures 1 to 9. The housing 100 is the housing of the endoscope handle, and is hollow inside. The traction wheel 200 is installed inside the housing 100 and is used to connect a traction rope. Rotating the traction wheel 200 controls the movement of the traction rope. The housing 100 also has an operating hole 130 communicating with its interior, through which a lever 500 connected to the traction wheel 200 passes. In use, the operator controls the rotation of the traction wheel 200 by controlling a portion of the lever 500 located outside the housing 100.

[0025] To facilitate operator gripping and operation of the housing 100, the outer wall of the housing 100 is designed to be as smooth as possible. The traction wheel 200 is installed inside the housing 100, near the operating hole 130, and is approximately cylindrical. Because the shape variations of the housing 100 and the traction wheel 200 differ, the closer the housing 100 is to the operating hole 130, the smaller the gap between them; conversely, the farther away from the operating hole 130, the larger the gap.

[0026] In some embodiments of this application, a shielding structure 300 is fixed to the housing 100, and the shielding structure 300 is also provided corresponding to the operating hole 130 to shield the gap between the housing 100 and the traction wheel 200. Since the gap between the housing 100 and the traction wheel 200 is shielded, external vision cannot see into the housing 100 through the operating hole 130, and the internal structure of the housing 100 cannot be observed. This not only protects the internal structure of the housing 100 but also makes the overall appearance of the endoscope handle more concise and aesthetically pleasing. Furthermore, because the shielding structure 300 shields the gap between the housing 100 and the traction wheel 200, even if external impurities pass through the operating hole 130 and fall into the housing 100, the shielding structure 300 will prevent the impurities from further entering the housing 100, reducing the risk of impurities obstructing the rotation of the traction wheel 200.

[0027] The term "obstruction structure 300 corresponding to operation hole 130" means that the obstruction structure 300 should be installed around the operation hole 130, specifically on the portion of the housing 100 corresponding to the operation hole 130. Only in this way can the obstruction structure 300 effectively block the view from the outside through the operation hole 130 into the interior of the housing 100. If the obstruction structure 300 is not corresponding to the operation hole 130, and the obstruction structure 300 and the operation hole 130 are located on opposite sides of the traction wheel 200, then the obstruction structure 300 will not be able to effectively block the view or obstruct debris.

[0028] The locking mechanism provided in this embodiment is configured such that, during at least a portion of the rotational stroke of the traction wheel 200, the blocking structure 300 can press against the surface of the traction wheel 200 to achieve damped self-locking of the traction wheel 200. The blocking structure 300 pressing against the surface of the traction wheel 200 generates friction between itself and the surface of the traction wheel 200, thereby preventing the traction wheel 200 from moving relative to the blocking structure 300.

[0029] After the traction wheel 200 is controlled to rotate until it abuts against the blocking structure 300, the control of the traction wheel 200 is released. The traction wheel 200 tends to return to its original position under the pull of the traction rope, but the friction between the blocking structure 300 and the traction wheel 200 will prevent it from returning to its original position. Therefore, to achieve self-locking of the traction wheel 200, the friction between the blocking structure 300 and the traction wheel 200 must not be less than the pull of the traction rope on the traction wheel 200. If it is necessary to continue controlling the rotation of the traction wheel 200, the force applied by the operator to the traction wheel 200 must be greater than the maximum static friction between the blocking structure 300 and the traction wheel 200 to drive the traction wheel 200 to continue rotating.

[0030] In some embodiments, the traction wheel 200 can be configured to abut against the shielding structure 300 throughout its entire rotation stroke. Moving the traction wheel 200 to any position allows it to self-lock, and the bending angle of the curved tube can be stabilized at any position within its bending range, thereby improving the flexibility of endoscope use. In other embodiments, the traction wheel 200 can be configured to abut against the shielding structure 300 only for a portion of its rotation stroke. The traction wheel 200 only abuts against the shielding structure 300 to achieve damped self-locking when rotated to a preset angle. This arrangement reduces the resistance encountered by the operator when moving the traction wheel 200, and also reduces wear on the surfaces of the shielding structure 300 and the traction wheel 200, extending the endoscope's service life. The rotation angle at which the traction wheel 200 can achieve damped self-locking generally corresponds to the commonly used bending angle of the curved tube it is connected to, reducing the impact on endoscope use due to the limited damped self-locking angle achievable by the traction wheel 200.

[0031] The shielding structure 300 can press against the end face of the traction wheel 200 or against the peripheral sidewall of the traction wheel 200. When the shielding structure 300 presses against the end face of the traction wheel 200, it primarily blocks the gap between the end face of the traction wheel 200 and the housing 100. When the shielding structure 300 presses against the peripheral sidewall of the traction wheel 200, it primarily blocks the gap between the peripheral sidewall of the traction wheel 200 and the housing 100.

[0032] The blocking structure 300 is directly fixed to the housing 100. While fulfilling the blocking function, it can also cooperate with the traction wheel 200 to achieve damping self-locking of the traction wheel 200. The blocking structure 300 has two functions simultaneously. Compared with the self-locking structure of the traction wheel 200 in the prior art, the locking mechanism provided in this embodiment has a simpler structure. In the manufacturing process, it can simplify the production process of the endoscope handle, reduce production costs, and make the subsequent assembly process of the endoscope simpler and more efficient.

[0033] The traction wheel 200 has a connecting portion 220 for connecting the lever 500, as shown in FIG9. When the operator controls the traction wheel 200 to rotate via the lever 500, the position of the connecting portion 220 also changes accordingly. The connecting portion 220 has a first position, in which the corresponding curved tube is vertically arranged and not bent. In some embodiments, there are two blocking structures 300, which are distributed circumferentially along the traction wheel 200 and are located on both sides of the connecting portion 220 in the first position.

[0034] With the connecting part 220 in the first position, the traction wheel 200 rotates toward different blocking structures 300. The rotation directions of the traction wheels 200 are opposite, and the bending directions of the corresponding curved tubes are also different. In some preferred embodiments, the contact areas between the two blocking structures 300 and the surfaces of the traction wheel 200 are different, as shown in Figures 7 and 8, and / or the interference fits between the two blocking structures 300 and the surfaces of the traction wheel 200 are different. This results in different resistances experienced by the traction wheel 200 when it presses against the two different blocking structures 300, thus providing the operator with different operating feel. This allows the operator to distinguish the bending direction of the curved tube by operating feel, improving the ease of use of the endoscope.

[0035] The difference in interference fit between the two shielding structures 300 and the surfaces of the traction wheel 200 refers to the difference in deformation between the two shielding structures 300 and their corresponding portions of the traction wheel 200 surfaces when the surfaces of the shielding structures 300 and the traction wheel 200 are in contact. Due to this difference in deformation, the external driving force required for the shielding structures 300 is also different, providing the operator with a tactile distinction. For example, when the traction wheel 200 rotates to an angle where it abuts against the shielding structure 300, the gap between the surface of the traction wheel 200 and the housing 100 is smaller than the size of the corresponding shielding structure 300. Therefore, when the shielding structure 300 abuts against the surface of the traction wheel 200, it needs to deform to accommodate the gap. The difference in size between the two shielding structures 300 and their corresponding gaps results in a difference in the interference fit between the two shielding structures 300 and the surfaces of the traction wheel 200.

[0036] Due to the different interference fits, the positive pressure between the surfaces of the shielding structure 300 and the traction wheel 200 is different. According to the characteristics of friction, the greater the positive pressure, the greater the friction between the surfaces of the shielding structure 300 and the traction wheel 200, and the greater the operating resistance to the operator. Therefore, it can provide the operator with different operating feel, and the operator can distinguish the rotation direction of the traction wheel 200 by the difference in the magnitude of the operating force.

[0037] The difference in contact area between the two shielding structures 300 and the surface of the traction wheel 200 can also cause differences in the operating feel. When the operator rotates the traction wheel 200 and it comes into contact with the shielding structure 300, the traction wheel 200 needs to be rotated further after the surfaces of the shielding structure 300 and the traction wheel 200 have just made contact. This increases the contact area between the traction wheel 200 and the shielding structure 300, thereby increasing the upper limit of static friction between the surfaces of the shielding structure 300 and the traction wheel 200. This improves the locking stability of the traction wheel 200 and prevents the traction wheel 200 from rotating under the pull of the traction rope due to a low upper limit of static friction.

[0038] As the shielding structure 300 and the traction wheel 200 begin to make initial contact and the traction wheel 200 continues to rotate, the increased contact area between the shielding structure 300 and the traction wheel 200 results in more friction points between them, thus increasing the friction between them. Consequently, the operator needs to provide more driving force, and the operating feel of the two shielding structures 300 will also be different.

[0039] The locking between the traction wheel 200 and the blocking structure 300 actually means that the upper limit of the static friction force between them is greater than the pulling force of the traction rope on the traction wheel 200. In some preferred embodiments of this application, a damping structure 400 is provided on the surface of the traction wheel 200. The damping structure 400 contacts the blocking structure 300, increasing the coefficient of friction between them, thereby increasing the upper limit of the static friction force and improving the locking effect of the blocking structure 300 on the traction wheel 200. In other embodiments, the blocking structure 300 may also be a damping structure 400, or the blocking structure 300 may be a damping structure 400, and the surface of the traction wheel 200 may also be provided with a damping structure 400.

[0040] In some specific embodiments, the surface of the traction wheel 200 is provided with two damping structures 400 arranged circumferentially thereon, as shown in Figures 1 to 4. The traction wheel 200 can be self-locked by either damping structure 400 abutting against the blocking structure 300. In practical use of endoscopes, the bending angle of the curved tube is usually its maximum bending angle. Therefore, two damping structures 400 can be provided, corresponding to the two bending angles in two directions of the curved tube respectively. When the traction wheel 200 rotates to its limit position, the blocking structure 300 abuts against the damping structure 400, thereby locking the traction wheel 200.

[0041] For example, when the traction wheel 200 rotates in one direction and reaches one of the extreme positions of its rotational stroke, the blocking structure 300 can press against one of the damping structures 400, cooperating with the damping structure 400 to achieve damping self-locking of the traction wheel 200. When the traction wheel 200 rotates in the other direction and reaches another extreme position of its rotational stroke, the blocking structure 300 presses against the other damping structure 400, cooperating with the damping structure 400 to achieve damping self-locking of the traction wheel 200.

[0042] During the rotation stroke of the traction wheel 200, damping self-locking of the traction wheel 200 is only achieved when the damping structure 400 and the blocking structure 300 are pressed together. When the blocking structure 300 is not in contact with the damping structure 400, there is no friction between the blocking structure 300 and the surface of the traction wheel 200, and the rotation of the traction wheel 200 is not hindered by the blocking structure 300, making the rotation of the traction wheel 200 smoother. At the same time, when the blocking structure 300 and the damping structure 400 come into contact, the operator can clearly feel the change in operating feel and can directly judge that the traction wheel 200 has almost reached its limit position. The operator can then correspondingly slow down the speed of turning the lever 500 connected to the traction wheel 200 to avoid the lever 500 directly and quickly touching the housing 100, which would cause a collision between the lever 500 and the housing 100.

[0043] In some embodiments, only one blocking structure 300 may be provided. The blocking structure 300 may be located in the middle of the operating hole 130 to facilitate cooperation with the two damping structures 400. Furthermore, the blocking structure 300 should be positioned to avoid interfering with the normal movement of the lever 500.

[0044] In other embodiments, two shielding structures 300 may be provided, distributed circumferentially along the traction wheel 200. Referring to Figures 1 to 4, the two shielding structures 300 are correspondingly arranged with the two damping structures 400. When the traction wheel 200 rotates to one of the extreme positions of its rotational stroke, one shielding structure 300 presses against its corresponding damping structure 400. When the traction wheel 200 rotates to the other extreme position of its rotational stroke, the other shielding structure 300 presses against its corresponding damping structure 400.

[0045] Compared to having only one blocking structure 300, having two blocking structures 300, and having the two blocking structures 300 separately, provides a better blocking effect on the gap between the traction wheel 200 and the housing 100. The two blocking structures 300 can achieve differences in the operating feel when the traction wheel 200 is rotated to different extreme positions. The blocking structure 300 corresponds one-to-one with the damping structure 400, making it easier to adjust the contact area and interference fit between the two, further amplifying the difference in operating feel when the traction wheel 200 rotates to the two extreme positions.

[0046] Two shielding structures 300 can be respectively disposed at both ends of the operating hole 130 along its length. The gap between the housing 100 and the traction wheel 200 at both ends of the operating hole 130 is larger, and the shielding structure 300 located at the end of the operating hole 130 provides a better shielding effect. Furthermore, the shielding structure 300 is fixed to the housing 100, which can correspondingly enhance the strength of the housing 100 around the operating hole 130. When the lever 500 is moved to the end of the operating hole 130 and contacts the housing 100, the structure of the housing 100 is more stable and less prone to damage.

[0047] In some embodiments of this application, when a damping structure 400 is provided on the surface of the traction wheel 200, the blocking structure 300 can continuously press against the surface of the damping structure 400 during the rotational stroke of the traction wheel 200. Along the circumference of the traction wheel 200, the length of the damping structure 400 needs to be greater than the length of the rotational stroke of the traction wheel 200 to ensure that the blocking structure 300 can continuously press against the surface of the damping structure 400. Because the damping structure 400 and the blocking structure 300 are constantly in contact, the blocking structure 300 provides better shielding for the internal space of the housing 100. The continuous pressing and engagement between the blocking structure 300 and the damping structure 400 allows the traction wheel 200 to be stabilized at any angular position, thus stabilizing the bending angle of the corresponding curved tube.

[0048] The damping structure 400 can be disposed on the end face of the traction wheel 200 or on the peripheral sidewall of the traction wheel 200. Disposing the damping structure 400 on the peripheral sidewall of the traction wheel 200 will not affect the placement of other components on the end face of the traction wheel 200. Furthermore, the gap between the peripheral sidewall of the traction wheel 200 and the housing 100 is larger than that between the end face of the traction wheel 200 and the housing 100, resulting in better shielding of the gap between the traction wheel 200 and the housing 100 when the damping structure 400 is in contact with the shielding structure 300.

[0049] The traction wheel 200 is rotatably mounted within the housing 100. It has a placement structure 210 and a connecting portion 220 distributed along its axial direction. Referring to Figure 9, the placement structure 210 has a receiving space 211 for mounting the traction rope. The traction rope is fixed at its proximal end to the traction wheel 200 and at its distal end to the bending tube. The bending angle of the bending tube is controlled by rotating the traction wheel 200 to pull the traction rope. When the blocking structure 300 is installed, it must avoid obstructing the traction rope connected to the placement structure 210 to prevent it from affecting the tension and movement of the traction rope. The connecting portion 220 is used to connect the lever 500. The connecting portion 220 can be an adhesive point, allowing the lever 500 to be directly fixed to it; the connecting portion 220 can also be a groove structure, with the lever 500 snapped into it; or the connecting portion 220 can be another type of fixed connection structure.

[0050] In some embodiments, the placement structure 210, the connecting part 220, and the damping structure 400 are arranged sequentially along the axial direction of the traction wheel 200. The point of application of the traction force of the traction rope on the traction wheel 200 in the placement structure 210 and the point of application of the damping structure 400 by the blocking structure 300 are located on both sides of the point of application of the driving force of the lever 500 on the traction wheel 200, so that the force on the traction wheel 200 can be as balanced as possible along its axial direction, avoiding the traction wheel 200 from tilting or deflecting in a certain direction, and also avoiding the situation where the shaft connected to the traction wheel 200 experiences force concentration due to the tilting or deflection of the traction wheel 200, which would affect its structure.

[0051] In other embodiments, the middle portion of the connecting portion 220 and the middle portion of the damping structure 400 are located on the same cross-section of the traction wheel 200. The middle portion of the connecting portion 220 refers to the location of its centerline. The middle portion of the damping structure 400 refers to the location of its centerline. Having their middle portions on the same cross-section of the traction wheel 200 facilitates the movement of the lever 500, allowing the damping structure 400 and the blocking structure 300 to slide relative to each other, thus engaging the traction wheel 200 from its self-locking state. More preferably, the middle portion of the blocking structure 300 is also located on the same cross-section of the traction wheel 200. This ensures that the frictional force between the blocking structure 300 and the damping structure 400 and the driving force on the lever 500 are on the same plane, reducing the force required to move the lever 500.

[0052] Referring to Figures 4 and 5, the housing 100 includes a first housing 110 and a second housing 120 arranged facing each other. During the assembly process of the endoscope handle, the components are generally concentrated in the first housing 110 or the second housing 120, and then the other housing 100 is placed over the housing 100 containing the components to complete the assembly. Corresponding to the housing 100, the shielding structure 300 includes a first sub-part 310 and a second sub-part 320 arranged along the assembly direction of the first housing 110 and the second housing 120. The first sub-part 310 is fixed to the first housing 110, and the second sub-part 320 is fixed to the second housing 120. The shielding structure 300 can also be assembled during the assembly of the housing 100.

[0053] The first sub-part 310 has a snap-fit ​​groove 311 on the side facing the second sub-part 320. The second sub-part 320 snaps into the snap-fit ​​groove 311 and is located on the side of the first sub-part 310 away from the traction wheel 200. The first sub-part 310 is used for abutting engagement with the surface of the traction wheel 200, and the second sub-part 320 is used to support the first sub-part 310 when it is pressed against the surface of the traction wheel 200. The assembly gap between the first sub-part 310 and the second sub-part 320 provides deformation space for the first sub-part 310. At the same time, after the first sub-part 310 is deformed, the second sub-part 320 can support the first sub-part 310, which can prevent damage to the structure of the first sub-part 310. Moreover, after the first sub-part 310 and the second sub-part 320 are assembled, the assembly gap between them does not affect the blocking effect of the blocking structure 300 on the gap.

[0054] In some other embodiments of this application, to facilitate the deformation of the shielding structure 300 and make it easier to recover after deformation, the shielding structure 300 includes a first shielding segment 340 and a second shielding segment 350. Referring to Figures 2, 4, and 6 to 8, one end of the first shielding segment 340 is connected to the housing 100, and the other end is connected to the second shielding segment 350. The first shielding segment 340 and the second shielding segment 350 extend in different directions, and the second shielding segment 350 is used to abut against the surface of the traction wheel 200. The second shielding segment 350 is not directly connected to the housing 100; there is a certain gap between the second shielding segment 350 and the housing 100. When the second shielding segment 350 abuts against the traction wheel 200, the second shielding segment 350 is more easily deformed.

[0055] The first blocking section 340 extends radially along the traction wheel 200, and the second blocking section 350 extends circumferentially along the traction wheel 200. When the blocking structure 300 presses against the circumferential sidewall of the traction wheel 200, the second blocking section 350 has a more stable contact with the surface of the traction wheel 200. Compared to the second blocking section 350 extending in other directions, the second blocking section 350 extending circumferentially along the traction wheel 200 has a larger contact area with the surface of the traction wheel 200, which is more conducive to the traction wheel 200 achieving damping self-locking. The surface of the second blocking section 350 that presses against the surface of the traction wheel 200 is a mating surface 330. Referring to Figures 7 and 8, the mating surface 330 makes surface contact with the surface of the traction wheel 200. By controlling the area of ​​the mating surface 330, the resistance between the traction wheel 200 and the blocking structure 300 can be changed.

[0056] The first shielding section 340 extends radially along the traction wheel 200. When the shielding structure 300 abuts against the traction wheel 200, the force direction of the first shielding section 340 is the same as its extension direction. During the use of the housing 100, the first shielding section 340 structure is more stable and less prone to bending and damage.

[0057] In some preferred embodiments, both ends of the shielding structure 300 extend axially toward the housing 100 along the axial direction of the traction wheel 200 and are fixed to the housing 100. The increased length of the shielding structure 300 results in better shielding. The fact that the ends of the shielding structure 300 are also fixed to the housing 100 increases the number of connection points 220 between the shielding structure 300 and the housing 100, leading to a more stable connection between them.

[0058] This application also provides an endoscope handle, including the traction wheel locking mechanism provided in any of the above embodiments. A schematic diagram of the internal structure of the endoscope handle is shown in Figures 1 and 3.

[0059] This application also provides an endoscope, including the endoscope handle provided in any of the above embodiments. The endoscope in this application can be a bronchoscope, pyeloscope, esophagoscope, gastroscope, colonoscope, otoscope, rhinoscope, oral endoscope, laryngoscope, colposcope, laparoscope, arthroscope, etc., and this application does not specifically limit the type of endoscope.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A traction wheel locking mechanism, applied to an endoscope, characterized in that, Includes a housing (100), a traction wheel (200), and a shielding structure (300), wherein: The traction wheel (200) is rotatably mounted inside the housing (100). The housing (100) is provided with an operating hole (130) for the lever (500) connected to the traction wheel (200) to pass through. The shielding structure (300) is fixed to the housing (100) and is provided corresponding to the operating hole (130). The shielding structure (300) is used to shield the gap between the housing (100) and the traction wheel (200). The locking mechanism is configured such that, during at least a portion of the rotational stroke of the traction wheel (200), the shielding structure (300) can press against the surface of the traction wheel (200) to achieve damped self-locking of the traction wheel (200).

2. The traction wheel locking mechanism according to claim 1, characterized in that The traction wheel (200) has a connecting part (220) for connecting the lever (500). The connecting part (220) has a first position. When the connecting part (220) is in the first position, the curved tube connected to the traction wheel (200) is vertically arranged. There are two shielding structures (300). The two shielding structures (300) are distributed along the circumference of the traction wheel (200) and are respectively located on both sides of the connecting part (220) in the first position. The contact areas between the two shielding structures (300) and the surfaces of the traction wheel (200) are different, and / or the interference fits are different.

3. The traction wheel locking mechanism according to claim 1, characterized in that The surface of the traction wheel (200) is provided with two damping structures (400) arranged circumferentially thereon. When the traction wheel (200) rotates to one of the extreme positions in its rotation stroke, the blocking structure (300) presses against one of the damping structures (400). When the traction wheel (200) rotates to the other extreme position in its rotation stroke, the blocking structure (300) presses against the other damping structure (400).

4. The traction wheel locking mechanism according to claim 3, characterized in that There are two shielding structures (300), which are distributed around the circumference of the traction wheel (200). The two shielding structures (300) are provided in a one-to-one correspondence with the two damping structures (400). When the traction wheel (200) rotates to one of its extreme positions during its rotational stroke, one of the shielding structures (300) presses against its corresponding damping structure (400); when the traction wheel (200) rotates to the other extreme position, the other shielding structure (300) presses against its corresponding damping structure (400).

5. The traction wheel locking mechanism according to claim 1, characterized in that The surface of the traction wheel (200) is provided with a damping structure (400). Along the circumference of the traction wheel (200), the length of the damping structure (400) is greater than the length of the rotation stroke of the traction wheel (200). During the rotation stroke of the traction wheel (200), the shielding structure (300) presses against the surface of the damping structure (400).

6. The traction wheel locking mechanism according to claim 3 or 5, characterized in that, The traction wheel (200) has a placement structure (210) and a connecting part (220) distributed along its axial direction. The placement structure (210) has a receiving space (211) for installing a traction rope. The connecting part (220) is used to connect a lever (500). The placement structure (210), the connecting part (220), and the damping structure (400) are arranged sequentially along the axial direction of the traction wheel (200). Alternatively, the middle part of the connecting part (220) and the middle part of the damping structure (400) are located on the same cross section of the traction wheel (200). And / or, the damping structure (400) is disposed on the peripheral sidewall of the traction wheel (200).

7. The traction wheel locking mechanism according to claim 1, characterized in that, The housing (100) includes a first housing (110) and a second housing (120) arranged facing each other. The shielding structure (300) includes a first sub-part (310) and a second sub-part (320) arranged along the assembly direction of the first housing (110) and the second housing (120). The first sub-part (310) is fixed to the first housing (110), and the second sub-part (320) is fixed to the second housing (120). The first sub-part (310) has a snap-fit ​​groove (311) on the side facing the second sub-part (320), the second sub-part (320) snaps into the snap-fit ​​groove (311), and the second sub-part (320) is located on the side of the first sub-part (310) away from the traction wheel (200). The first sub-part (310) is used to press against the surface of the traction wheel (200), and the second sub-part (320) is used to support the first sub-part (310) when the first sub-part (310) presses against the surface of the traction wheel (200).

8. The traction wheel locking mechanism according to claim 1, characterized in that, The shielding structure (300) includes a first shielding section (340) and a second shielding section (350). One end of the first shielding section (340) is connected to the housing (100), and the other end is connected to the second shielding section (350). The first shielding section (340) extends radially along the traction wheel (200), and the second shielding section (350) extends circumferentially along the traction wheel (200). And / or, the shielding structure (300) extends at both ends of the traction wheel (200) axially toward the housing (100) and is fixed to the housing (100).

9. An endoscope handle, characterized in that, Includes the traction wheel (200) locking mechanism as described in any one of claims 1-8.

10. An endoscope, characterized in that, Includes the endoscope handle as described in claim 9.

Images