Self-locking apparatus, endoscope handle, and endoscope

Abstract

Provided are a self-locking apparatus, an endoscope handle, and an endoscope. The self-locking apparatus comprises a driving lever (310), a rotating shaft (320), a traction rope driving member (330), an elastic member (340), and a first limiting assembly. The traction rope driving member (330) is synchronously and rotationally connected to the rotating shaft (320). A sliding stroke is provided between the traction rope driving member (330) and the rotating shaft (320) in an axial direction of the rotating shaft (320). The first limiting assembly comprises a resistance member (351). An axial movement stroke of the rotating shaft (320) comprises a first position and a second position. The elastic member (340) comprises a mounting portion (342) and an arc-shaped elastic portion (341). The self-locking apparatus can effectively avoid the problem in the prior art that teeth and tooth grooves on a driven gear and a driving gear are damaged due to the action of the elastic member on the driven gear. Meanwhile, the resistance corresponding to a unit length deformation generated by the arc-shaped elastic portion (341) of the elastic member (340) is reduced, the movement space for elastic deformation of the arc-shaped elastic portion (341) is increased, and the resistance encountered by the arc-shaped elastic portion (341) during a relatively large elastic deformation is reduced, so that a medical worker can easily and quickly complete state switching control, thereby improving the use convenience of the endoscope.

Description

Self-locking device, endoscope handle and endoscope Technical Field

[0001] The present invention relates to the technical field of endoscopes, and in particular to a self-locking device, an endoscope handle and an endoscope. Background Art

[0002] As one of the important medical instruments in modern surgical operations, the endoscope includes an operating handle and an insertion part. The insertion part can enter the human body through the human cavity or surgical incision. The camera module at the distal end of the insertion part helps the doctor determine the location of the lesion in the patient's body and the tissue structure characteristics of the lesion location; the operating handle is provided with a wheel for fixing the traction rope. The control lever can drive the wheel to rotate, and then the traction rope drives the distal end of the insertion part to directional bend. At the same time, the self-locking device is used to lock the wheel to achieve locking of the directional bending state of the insertion part, so that the operator does not need to maintain the lever state, reducing the operator's operating burden.

[0003] However, in the process of realizing the present invention, the applicant discovered that the elastic sheet used in the existing self-locking device is prone to wear when switching between unlocking and locking states, which affects the service life of the device. Summary of the Invention

[0004] The purpose of this application is to provide a self-locking device, an endoscope handle, and an endoscope to solve the above-mentioned technical problems existing in the prior art, mainly including the following three aspects:

[0005] The first aspect of the present application provides a self-locking device for an endoscope, comprising a shift lever, a rotating shaft, a traction rope driving member, an elastic member and a first limiting assembly, wherein the shift lever is used to drive the rotating shaft to move axially, the traction rope driving member is used to drive the traction rope to realize directional bending of the insertion portion of the endoscope, the traction rope driving member is synchronously rotated and connected to the rotating shaft, and a sliding stroke is provided between the traction rope driving member and the rotating shaft along the axial direction of the rotating shaft, the first limiting assembly includes a resistance member, the axial movement stroke of the rotating shaft includes a first position and a second position, in the first position state, the traction rope driving member is not associated with the resistance member, in the second position state, the resistance member is connected to the traction rope driving member to realize increasing the rotational resistance of the traction rope driving member, the elastic member includes a mounting portion and an arc-shaped elastic portion, the mounting portion is used to realize fixed installation of the elastic member, the arc-shaped elastic portion is connected to the rotating shaft to realize that the deformation amount of the arc-shaped elastic portion gradually changes with the axial movement stroke of the rotating shaft, and the opening direction of the arc-shaped elastic portion corresponding to the first position of the rotating shaft is opposite to the opening direction of the arc-shaped elastic portion corresponding to the second position of the rotating shaft.

[0006] Furthermore, the arc-shaped elastic portion includes a first normal state and a second normal state, and one of the first normal state and the second normal state corresponds to the first position or the second position of the rotating shaft;

[0007] Alternatively, one of the first normal state and the second normal state corresponds to the first position of the rotating shaft, and the other of the first normal state and the second normal state corresponds to the second position of the rotating shaft.

[0008] Furthermore, the arc-shaped elastic portion is rotatably connected to the rotating shaft, or the mounting portion is used to be rotatably connected to the endoscope housing.

[0009] Furthermore, the elastic member is a symmetrical structure, and the elastic member includes two mounting portions, the mounting portions are connected to the arc-shaped elastic portion via connecting portions, and the projections of the mounting portions on the arc-shaped elastic portion are located inside the arc-shaped elastic portion.

[0010] Furthermore, the self-locking device also includes a second limiting component, which is used to limit the sliding stroke of the traction rope driving component in the axial direction of the rotating shaft.

[0011] Furthermore, the second limiting assembly includes a protrusion, which is connected to the traction rope driving member, and the protrusion is used to cooperate with the endoscope housing to achieve limiting constraints on the sliding stroke of the traction rope driving member in the axial direction of the rotating shaft.

[0012] Furthermore, a fitting portion is provided between the resistance member and the traction rope driving member, and the fitting portion is connected to the rotating shaft so that the fitting portion follows the rotating shaft to move axially. In the first position state, the fitting portion is not associated with the resistance member. In the second position state, the resistance member abuts against the fitting portion to increase the rotational resistance of the traction rope driving member.

[0013] Furthermore, the first limiting assembly further includes an adapter, the resistance member is fixedly connected to the endoscope housing via the adapter, and a rotation damping member is provided between the resistance member and the adapter.

[0014] The second aspect of the present application provides an endoscope handle, including a shell and the above-mentioned self-locking device, the rotating shaft, traction rope driving member, elastic member and first limiting assembly are arranged in the shell, and the shift rod is located outside the shell, and the shift rod is connected to the rotating shaft.

[0015] A third aspect of the present application provides an endoscope, comprising an insertion portion and the above-mentioned endoscope handle, wherein the insertion portion is at the distal end of the shell.

[0016] Compared with the prior art, the present invention has at least the following technical effects:

[0017] When the self-locking device of the present invention switches from the unlocked state to the self-locking state, the deformation force of the elastic member will not be transmitted to the resistance member and the traction rope driving member, thereby effectively avoiding the problem of damage to the teeth and tooth grooves on the driven gear and the driving gear due to the action of the elastic member on the driven gear. At the same time, the corresponding resistance when the arc-shaped elastic part of the elastic member produces a unit length deformation is reduced, the activity space of the arc-shaped elastic part to undergo elastic deformation is increased, and the resistance of the arc-shaped elastic part when a large elastic deformation occurs is reduced, so that medical personnel can easily and quickly complete the state switching control, thereby improving the convenience of using the endoscope. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention or the description of the prior art. 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 any creative work.

[0019] FIG1 is a schematic structural diagram of a self-locking device of the present invention;

[0020] FIG2 is a front view of the self-locking device of the present invention;

[0021] FIG3 is a schematic structural diagram of the self-locking device of the present invention in a self-locking state;

[0022] FIG4 is a schematic structural diagram of the self-locking device of the present invention in an unlocked state;

[0023] FIG5 is a schematic structural diagram of an elastic member of the present invention;

[0024] FIG6 is a schematic diagram of the connection structure between the traction rope driving member and the rotating shaft of the present invention;

[0025] FIG7 is a schematic diagram of the matching structure of the traction rope driving member and the housing of the present invention;

[0026] FIG8 is a schematic structural diagram of an endoscope according to the present invention;

[0027] In the figure,

[0028] 10. Shell; 110. Arc-shaped groove; 20. Insertion portion; 310. Push rod; 320. Rotating shaft; 330. Traction rope driving member; 340. Elastic member; 341. Arc-shaped elastic portion; 342. Mounting portion; 343. Connecting portion; 351. Resistance member; 352. Adapter; 353. Rotation damping member; 360. Fitting portion; 370. Protrusion; 380. Traction rope. DETAILED DESCRIPTION

[0029] The following description provides many different embodiments or examples for implementing different features of the present invention. The components and arrangements described in the following specific examples are only used to simplify the present invention and are only used as examples, not to limit the present invention.

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention for which protection is sought, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] In the present invention, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood broadly. For example, they can refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and they can refer to internal connectivity between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances. Furthermore, terms such as "first," "second," and "third" are used solely for descriptive purposes and are not to be construed as indicating or implying relative importance.

[0032] In the present invention, unless otherwise expressly specified or limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0033] In addition, in the present invention, "proximal" and "distal" refer to the far and near positions of the structure relative to the human body in the use environment, so as to facilitate the description of the positional relationship between components and facilitate understanding; for the same component, "proximal" and "distal" are the relative positional relationship of the component, not absolute; therefore, it should be understood from the perspective of realizing the principles of the present invention, and should not deviate from the essence of the present invention.

[0034] As one of the important medical instruments in modern surgical operations, the endoscope includes an operating handle and an insertion part. The insertion part can enter the human body through the human cavity or surgical incision. The camera module at the distal end of the insertion part helps the doctor determine the location of the lesion in the patient's body and the tissue structure characteristics of the lesion location; the operating handle is provided with a wheel for fixing the traction rope. The control lever can drive the wheel to rotate, and then the traction rope drives the distal end of the insertion part to directional bend. At the same time, the self-locking device is used to lock the wheel to achieve locking of the directional bending state of the insertion part, so that the operator does not need to maintain the lever state, reducing the operator's operating burden. Existing endoscope self-locking devices, such as the one disclosed in Chinese Patent Publication No. CN111202488A, employ an elastic sheet to maintain the self-locking device in the unlocked and locked states. However, when switching between the unlocked and locked states, the spring sheet directly engages the driven gear, and the pressing protrusion must be driven over the first protrusion on the spring sheet during the switching process. During this process, the interaction force between the pressing protrusion and the first protrusion is transmitted to the driven gear, increasing the contact pressure between the driven gear and the driving gear. The greater the contact pressure, the greater the risk of damage to the teeth and tooth grooves on the driven gear and the driving gear, thus shortening the service life of the device. Furthermore, the resistance to switching between the self-locking states is increased, thus affecting the ease of use of the endoscope. To address the problem of wear on the meshing gears of the self-locking device during state switching, the present application provides a locking device, an endoscope handle, and an endoscope that can reduce the risk of wear on the self-locking device during the self-locking state switching process. The specific structure is shown in the following embodiments.

[0035] Example 1:

[0036] The embodiment of the present application provides a self-locking device for an endoscope, as shown in Figures 1 and 2, including a lever 310, a rotating shaft 320, a traction rope driving member 330, an elastic member 340 and a first limiting assembly, wherein the lever 310 is used to drive the rotating shaft 320 to move axially along the rotating shaft 320, and the traction rope driving member 330 is used to drive the traction rope 380 to achieve directional bending of the insertion portion of the endoscope, the traction rope driving member 330 is synchronously rotated and connected to the rotating shaft 320, and there is a sliding stroke between the traction rope driving member 330 and the rotating shaft 320 along the axial direction of the rotating shaft, the first limiting assembly includes a resistance member 351, and the axial movement stroke of the rotating shaft 320 includes a first position and a second position. In the first position state, as shown in Figure 4 As shown, the traction rope driving member 330 is not associated with the resistance member 351. In the second position state, as shown in Figure 3, the resistance member 351 is connected to the traction rope driving member 330 to increase the rotational resistance of the traction rope driving member 330; as shown in Figure 5, the elastic member 340 includes a mounting portion 342 and an arc-shaped elastic portion 341, and the mounting portion 342 is used to achieve fixed installation of the elastic member 340. The arc-shaped elastic portion 341 is connected to the rotating shaft 320 to achieve a gradual change in the deformation of the arc-shaped elastic portion 341 with the axial movement stroke of the rotating shaft 320. The opening direction of the arc-shaped elastic portion 341 corresponding to the first position of the rotating shaft 320 is opposite to the opening direction of the arc-shaped elastic portion 341 corresponding to the second position of the rotating shaft 320.

[0037] 4, the self-locking device is in the unlocked state, the rotating shaft 320 is in the first position, the resistance member 351 does not directly affect the traction rope driving member 330 and the rotating shaft 320, and correspondingly, the arc-shaped elastic portion 341 of the elastic member 340 opens in a direction away from the traction rope driving member 330; when it is necessary to adjust the directional bending of the distal end of the insertion portion of the endoscope, the operator can drive the lever 310, and the lever 310 drives the rotating shaft 320 and the traction rope driving member 330 on the rotating shaft 320 to rotate synchronously, and the rotating traction rope driving member 330 guides the traction rope 380 to be wound or released, thereby allowing the insertion of the endoscope to be The distal end of the insertion portion undergoes directional bending. After the distal end of the insertion portion is directional bent in place, when it is necessary to lock the directional bending state of the distal end of the insertion portion, the operator can axially drive the lever 310 along the rotating shaft 320 to drive the rotating shaft 320 to move axially along the rotating shaft, so that the rotating shaft 320 moves from the first position to the second position. During this process, the elastic member 340 is not in direct contact with the resistance member 351 and the traction rope driving member 330, and the resistance member 351 and the elastic member 340 are fixed. The rotating shaft 320 overcomes the deformation resistance of the arc-shaped elastic portion 341 on the elastic member 340, so that the opening direction of the arc-shaped elastic portion 341 changes from being away from the traction rope driving member 330 to being away from the traction rope driving member 330. In order to move toward the traction rope driving member 330, the rotation shaft 320 is converted between the first position and the second position, and the switching from the unlocked state to the self-locking state is completed. That is to say, when the self-locking device switches from the unlocked state to the self-locking state, the deformation force of the elastic member 340 will not be transmitted to the resistance member 351 and the traction rope driving member 330, thereby effectively avoiding the problem of damage to the teeth and tooth grooves on the driven gear and the driving gear caused by the action of the elastic member 340 on the driven gear, and the axial movement process of the rotation shaft 320 only needs to overcome the reverse deformation resistance of the arc-shaped elastic portion 341, without being hindered and reacted by the driven gear in the prior art. When the arc-shaped elastic portion 341 of the elastic member 340 produces a unit length deformation, the corresponding resistance is reduced. At the same time, the activity space of the arc-shaped elastic portion 341 for elastic deformation is increased, and the resistance of the arc-shaped elastic portion 341 when a large elastic deformation occurs is reduced, so that medical personnel can easily and quickly complete the state switching control, thereby improving the convenience of using the endoscope; in addition, the state switching of the elastic member 340 is directly completed by the axial movement of the rotating shaft 320, so there is no need to add an additional transmission component between the lever 310 and the elastic member 340, which simplifies the structure of the self-locking device, increases the available space in the endoscope handle, and contributes to the miniaturization design of the endoscope.

[0038] In some embodiments, the arc-shaped elastic portion 341 includes a first normal state. In the first normal state, along the axial direction of the rotating shaft 320, when the rotating shaft 320 moves toward the opening direction of the arc-shaped elastic portion 341, the arc-shaped elastic portion 341 will undergo compression deformation, and when the rotating shaft 320 moves away from the opening direction of the arc-shaped elastic portion 341, the arc-shaped elastic portion 341 will undergo tension deformation. The first normal state corresponds to the first position of the rotating shaft 320. That is, due to the deformation resistance of the arc-shaped elastic portion 341 to the rotating shaft 320, the position of the rotating shaft 320 can be locked to prevent the rotating shaft 320 from moving axially, so that the self-locking device maintains the first position under normal conditions, and when a slight axial displacement occurs, the self-locking device can be quickly restored to the first position by the action of the arc-shaped elastic portion 341, and the unlocked state is continuously maintained, thereby avoiding the situation where the unlocked state fails due to accidental touch.

[0039] In some embodiments, the arc-shaped elastic portion 341 includes a first normal state, which corresponds to the second position of the rotating shaft 320. When the rotating shaft 320 moves toward the opening direction of the arc-shaped elastic portion 341, the arc-shaped elastic portion 341 will undergo compression deformation. When the rotating shaft 320 moves away from the opening direction of the arc-shaped elastic portion 341, the arc-shaped elastic portion 341 will undergo tension deformation. The first normal state corresponds to the second position of the rotating shaft 320. The deformation resistance of the arc-shaped elastic portion 341 to the rotating shaft 320 can prevent the rotating shaft 320 from moving axially. Even if the rotating shaft 320 undergoes a slight axial displacement, the self-locking device can be quickly restored to the second position by the action of the arc-shaped elastic portion 341, and the self-locking state is continuously maintained, thereby avoiding the failure of the self-locking state due to accidental touch.

[0040] In some embodiments, the arc-shaped elastic portion 341 includes a first normal state and a second normal state, one of the first normal state and the second normal state corresponds to the first position of the rotating shaft 320, and the other of the first normal state and the second normal state corresponds to the second position of the rotating shaft 320. In this embodiment, it is preferred that the first normal state corresponds to the first position of the rotating shaft 320, and the second normal state corresponds to the second position of the rotating shaft 320. That is, under the action of the arc-shaped elastic portion 341, when the self-locking device is in the unlocked state and the rotating shaft 320 is in the first position, the elastic member 340 can prevent the rotating shaft 320 from axially moving. Even if the rotating shaft 320 has a slight axial displacement, the self-locking device can be quickly restored to the first position and continuously maintained in the unlocked state; and when the self-locking device is switched to the self-locking state, the reversed elastic member 340 can continue to function to prevent the rotating shaft 320 from axially moving in the second position. Even if the rotating shaft 320 has a slight axial displacement, the self-locking device can be quickly restored to the second position and continuously maintained in the self-locking state, effectively improving the convenience and safety of the device and avoiding the situation where the state fails due to accidental touch.

[0041] In order to reduce the rotational resistance of the rotating shaft, an arc-shaped elastic portion 341 can be provided to be rotatably connected to the rotating shaft 320. When the rotating shaft 320 rotates, the elastic member 340 is fixed. When the rotating shaft 320 moves axially, the rotating shaft 320 drives the arc-shaped elastic portion 341 to undergo tensile or compressive deformation.

[0042] In some embodiments, in order to reduce the rotational resistance of the rotating shaft 320, a mounting portion 342 can be provided for rotationally connecting with the endoscope housing 10. When the rotating shaft 320 rotates, the elastic member 340 rotates synchronously with the rotating shaft 320. When the rotating shaft 320 moves axially, the rotating shaft 320 drives the arc-shaped elastic portion 341 to undergo tensile or compressive deformation.

[0043] To facilitate the user to switch between the self-locking and unlocking states, the elastic member 340 can be set to a symmetrical structure. The elastic member 340 includes two mounting portions 342, and the mounting portion 342 is connected to the arc-shaped elastic portion 341 through a connecting portion 343. The projection of the mounting portion 342 on the arc-shaped elastic portion 341 is located inside the arc-shaped elastic portion 341. When the arc-shaped elastic portion 341 undergoes compression deformation, the connecting portion 343 can not only provide deformation space for the arc-shaped elastic portion 341, but also deform synchronously with the arc-shaped elastic portion 341, so that the deformation upper limit of the arc-shaped elastic portion 341 is increased, and the corresponding resistance when the unit length deformation is generated is reduced. At the same time, the mounting portion 342 will not directly hinder the deformation of the arc-shaped elastic portion 341, thereby reducing the deformation resistance of the elastic member 340, so that the operator can complete the state switching control more easily and quickly, thereby improving the flexibility of use of the internal self-locking device.

[0044] Preferably, the mounting portion 342 , the connecting portion 343 and the arc-shaped elastic portion 341 are integrated. In some embodiments, the connecting portion 343 and the arc-shaped elastic portion 341 may also be integrated to make the mounting portion 342 and the connecting portion 343 detachably connected.

[0045] In order to reduce the impact of the self-locking device on the traction rope during the state switching process, the self-locking device can be set to also include a second limiting component, which is used to limit the axial sliding stroke of the traction rope driving component 330 on the rotating shaft 320. The second limiting component ensures that when the rotating shaft 320 moves axially, the traction rope driving component 330 and the traction rope 380 on the traction rope driving component 330 are fixed. When the rotating shaft 320 rotates, the traction rope driving component 330 rotates synchronously with the rotating shaft 320, thereby ensuring the independent operation of the state switching and the traction rope 380 drive control, thereby improving the stability and safety of the device.

[0046] In order to realize the limiting constraint of the sliding stroke of the traction rope driving member 330 in the axial direction of the rotating shaft 320 by the second limiting component, as shown in Figures 6 and 7, a second limiting component can be provided including a protrusion 370, which is connected to the traction rope driving member 330 and is used to cooperate with the endoscope housing 10 to realize the limiting constraint of the sliding stroke of the traction rope driving member 330 in the axial direction of the rotating shaft 320; correspondingly, an arc groove 110 is provided on the inner wall of the endoscope housing 10. Part of the protrusion 370 is located in the arc groove 110, and the protrusion 370 cooperates with the arc groove 110 to limit the rotation stroke of the traction rope drive 330. Preferably, the protrusion 370 slides with the inner wall track of the arc groove 110, which not only realizes the movement of the protrusion 370 along the arc groove 110, but also can use the arc groove 110 to limit the protrusion 370, thereby preventing the protrusion 370 and the traction rope drive 330 from moving along the axial direction of the rotating shaft.

[0047] In order to reduce the wear of the traction rope driving member 330, a matching portion 360 can be provided between the resistance member 351 and the traction rope driving member 330. The matching portion 360 is connected to the rotating shaft 320 to enable the matching portion 360 to move axially with the rotating shaft 320. In the first position, the matching portion 360 is not associated with the resistance member 351. In the second position, the resistance member 351 abuts against the matching portion 360 to increase the rotational resistance of the traction rope driving member 330 and achieve the purpose of self-locking.

[0048] Specifically, the traction rope driving member 330 is a rotating wheel, and the resistance member 351 and the matching part 360 are gears that match each other. In the second position state, the resistance member 351 and the matching part 360 are engaged to prevent the traction rope driving member 330 and the rotating shaft 320 from rotating, thereby achieving self-locking; in some embodiments, a first friction layer corresponding to the matching part 360 can also be provided on the resistance member 351, and a second friction layer corresponding to the first friction layer can also be further provided on the matching part 360. In the second position state, the resistance member 351 and the matching part 360 abut against each other, and the traction rope driving member 330 and the rotating shaft 320 are prevented from rotating by increasing the friction resistance, thereby achieving self-locking.

[0049] In order to prevent the resistance member 351 from being damaged by a rotational driving force exceeding its own limit in the self-locking state, especially when the resistance member 351 and the matching portion 360 are gears that match each other, as shown in Figures 1 and 2, a first limit assembly can be provided that also includes an adapter 352, and the resistance member 351 is fixedly connected to the endoscope housing 10 through the adapter 352. A rotation damping member 353 is provided between the resistance member 351 and the adapter 352. In the self-locking state, the rotation damping member 353 is used to limit the upper limit of the rotational driving force that the resistance member 351 can withstand. The limited upper limit of the rotational driving force (hereinafter referred to as the limited upper limit) is lower than the resistance member 351. 51 itself can withstand the limit of rotational driving force (referred to as its own limit). When the rotational driving force applied to the resistance member 351 is lower than the specified upper limit, the resistance member 351 and the adapter 352 are fixed, and the resistance member 351 continues to maintain a locking effect on the traction rope driving member 330. When the rotational driving force applied to the resistance member 351 exceeds the specified upper limit, the resistance member 351 rotates relative to the adapter 352, that is, the resistance member 351 temporarily fails and moves synchronously with the rotating shaft 320, thereby avoiding damage to the self-locking device due to accidental contact with excessive driving force (such as damage to the teeth of the gear or breakage of the rotating shaft), thereby improving the safety and convenience of equipment use.

[0050] In some embodiments, in order to achieve protection of the resistance member 351 by the rotational damping member 353, the rotational damping member 353 can be set as a rubber ring, and a through groove for installing the resistance member 351 is provided on the adapter 352, and the rubber ring is located between the peripheral wall of the resistance member 351 and the inner wall of the through groove.

[0051] Example 2:

[0052] An embodiment of the present application provides an endoscope handle, including a shell 10 and the self-locking device in Example 1, wherein the rotating shaft 320, the traction rope driving member 330, the elastic member 340 and the first limiting assembly are arranged in the shell 10, and the shift rod 310 is located outside the shell 10, and the shift rod 310 is connected to the rotating shaft 320.

[0053] Example 3:

[0054] An embodiment of the present application provides an endoscope, as shown in FIG8 , comprising an insertion portion 20 and the endoscope handle of Example 2, wherein the insertion portion 20 is at the distal end of the housing 10 .

[0055] It should be noted that the endoscope in the embodiments 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 embodiments of the present application do not impose any specific restrictions on the type of endoscope.

[0056] The above description is only 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 in the scope of protection of the present invention.

Claims

1. A self-locking device for an endoscope, characterized in that: The endoscope comprises a lever (310), a rotating shaft (320), a traction rope driving member (330), an elastic member (340) and a first limiting assembly, wherein the lever (310) is used to drive the rotating shaft (320) to move axially, the traction rope driving member (330) is used to drive the traction rope (380) to achieve directional bending of the insertion portion (20) of the endoscope, the traction rope driving member (330) is connected to the rotating shaft (320) in synchronous rotation, the traction rope driving member (330) and the rotating shaft (320) have a sliding stroke along the axial direction of the rotating shaft (320), the first limiting assembly comprises a resistance member (351), the axial movement stroke of the rotating shaft (320) comprises a first position and a second position, and in the first position state, the traction rope driving member (330) and the rotating shaft (320) are connected to each other in a synchronous rotation manner, and the traction rope driving member (330) and the rotating shaft (320) have a sliding stroke along the axial direction of the rotating shaft (320), the first limiting assembly comprises a resistance member (351), and the axial movement stroke of the rotating shaft (320) comprises a first position and a second position. The resistance member (351) is unrelated. In the second position state, the resistance member (351) is connected to the traction rope driving member (330) to increase the rotational resistance of the traction rope driving member (330). The elastic member (340) comprises a mounting portion (342) and an arc-shaped elastic portion (341). The mounting portion (342) is used to achieve fixed installation of the elastic member (340). The arc-shaped elastic portion (341) is connected to the rotating shaft (320) to achieve a gradual change in the deformation amount of the arc-shaped elastic portion (341) along the axial movement stroke of the rotating shaft (320). The opening direction of the arc-shaped elastic portion (341) corresponding to the rotating shaft (320) in the first position is opposite to the opening direction of the arc-shaped elastic portion (341) corresponding to the rotating shaft (320) in the second position.

2. The self-locking device according to claim 1, characterized in that: The arc-shaped elastic portion (341) comprises a first normal state and a second normal state, and one of the first normal state and the second normal state corresponds to the first position or the second position of the rotating shaft (320); Alternatively, one of the first normal state and the second normal state corresponds to the first position of the rotating shaft (320), and the other of the first normal state and the second normal state corresponds to the second position of the rotating shaft (320).

3. The self-locking device according to claim 2, characterized in that: The arc-shaped elastic portion (341) is rotatably connected to the rotating shaft (320), or the mounting portion (342) is used to be rotatably connected to the endoscope housing (10).

4. The self-locking device according to claim 1, characterized in that: The elastic member (340) is a symmetrical structure. The elastic member (340) comprises two mounting portions (342). The mounting portions (342) are connected to the arc-shaped elastic portion (341) via connecting portions (343). The projection of the mounting portions (342) on the arc-shaped elastic portion (341) is located inside the arc-shaped elastic portion (341).

5. The self-locking device according to any one of claims 1 to 4, characterized in that: The self-locking device further comprises a second limiting component, which is used to limit the sliding travel of the traction rope driving member (330) in the axial direction of the rotating shaft (320).

6. The self-locking device according to claim 5, characterized in that: The second limiting assembly comprises a protrusion (370), the protrusion (370) being connected to the traction rope driving component (330), and the protrusion (370) being used to cooperate with the endoscope housing (10) to achieve limiting constraints on the axial sliding stroke of the traction rope driving component (330) on the rotating shaft (320).

7. The self-locking device according to claim 6, characterized in that: A matching portion (360) is provided between the resistance member (351) and the traction rope driving member (330), and the matching portion (360) is connected to the rotating shaft (320) so as to enable the matching portion (360) to move axially following the rotating shaft (320). In a first position state, the matching portion (360) is not associated with the resistance member (351), and in a second position state, the resistance member (351) abuts against the matching portion (360) so as to increase the rotational resistance of the traction rope driving member (330).

8. The self-locking device according to claim 7, characterized in that: The first limiting component further comprises a conversion member (352), the resistance member (351) is fixedly connected to the endoscope housing (10) via the conversion member (352), and a rotation damping member (353) is provided between the resistance member (351) and the conversion member (352).

9. An endoscope handle, characterized in that: The invention comprises a housing (10) and a self-locking device according to any one of claims 1 to 8, wherein the rotating shaft (320), the traction rope driving member (330), the elastic member (340) and the first limit assembly are arranged in the housing (10), and the shifting rod (310) is located outside the housing (10), and the shifting rod (310) is connected to the rotating shaft (320).

10. An endoscope, characterized in that: The endoscope handle comprises an insertion portion (20) and the endoscope handle according to claim 9, wherein the insertion portion (20) is at the distal end of the housing (10).

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