Bending adjusting brake structure of endoscope

Abstract

The invention relates to the field of endoscopes, and provides a bending adjustment braking structure of an endoscope. The bending adjusting brake structure of the endoscope comprises a fixed shaft, a bending adjusting mechanism and a bending adjusting mechanism, the brake knob is sleeved outside the fixed shaft; the adaptive operation knob is located on one axial side of the brake knob, and a brake groove is formed in one side, close to the brake knob, of the adaptive operation knob; the brake disc is arranged in the brake groove and comprises a disc-shaped main body and at least one brake arm, a fixed part of the brake arm protrudes out of one side, facing a notch of the brake groove, of the disc-shaped main body, and an elastic overhanging part extends in the circumferential direction of the disc-shaped main body; the braking knob is provided with a pushing part arranged on the side, close to the fixing shaft, of the elastic overhanging part, the elastic overhanging part comprises a pushing adaptive part arranged on the side, away from the groove side wall of the braking groove, of the elastic overhanging part, and the pushing part is used for extruding the pushing adaptive part when the braking knob rotates in the corresponding direction so that the elastic overhanging part can expand outwards and abut against the groove side wall of the braking groove. The invention mainly solves the problem of how to ensure the braking reliability of the bending adjustment braking structure of the endoscope.

Description

Technical Field

[0001] The present invention relates to the field of endoscopes. Background Art

[0002] With advances in medical technology and the development and widespread adoption of advanced medical equipment, endoscopes are increasingly being used in minimally invasive surgery, as well as in internal and external surgeries. An endoscope is an important auxiliary medical instrument for detecting lesions in internal organs, helping users clearly and intuitively understand the location of lesions and improving the accuracy of diagnosis.

[0003] When working, an endoscope often needs to bend so that the camera module at the far end faces the desired direction. The bending operation can be achieved by controlling the bending section of the endoscope to bend using a bending control system. The bending control system may include, for example, a large wheel drive unit, a small wheel drive unit, a large wheel brake unit, and a small wheel brake unit provided on an operating handle. The bending control system of the endoscope controls the displacement of the traction line through relevant operations, thereby achieving the deflection of the tip of the endoscope in the horizontal and vertical directions. The large wheel brake unit and the small wheel brake unit can respectively lock the large wheel drive unit and the small wheel drive unit. When locked, the shape of the tip can be kept fixed. When unlocked, the bending shape of the tip can be easily adjusted by the operating end.

[0004] The design of the bending and braking structure of the endoscope needs to consider the braking reliability of the components. Summary of the Invention

[0005] The present invention mainly solves the technical problem of how to ensure the braking reliability of the bending brake structure of an endoscope.

[0006] In one embodiment, a bending and braking structure of an endoscope is provided, comprising:

[0007] Fixed axis for fixed settings;

[0008] a brake knob sleeved outside the fixed shaft;

[0009] An adapting operating knob is sleeved outside the fixed shaft and adapted to the brake knob, and is used to control the degree of bending of the insertion portion of the endoscope when rotated; the adapting operating knob is located on one axial side of the brake knob, and a brake groove is provided on the side of the adapting operating knob close to the brake knob;

[0010] and a brake disc disposed in the brake groove, the brake disc comprising a disc-shaped body and at least one brake arm, the disc-shaped body being sleeved on the fixed shaft and positioned along the circumference of the fixed shaft, the brake arm comprising a fixed portion and an elastic overhanging portion, the fixed portion protruding from a side of the disc-shaped body facing the notch of the brake groove, the elastic overhanging portion being connected to the fixed portion and extending along the circumference of the disc-shaped body;

[0011] The brake knob has a pushing portion arranged on the side of the elastic cantilever portion close to the fixed axis, and the elastic cantilever portion includes a pushing adapter portion arranged on the side of the groove sidewall away from the brake groove. The pushing portion is used to squeeze the pushing adapter portion when the brake knob rotates in the corresponding direction, so that the elastic cantilever portion expands outward and presses against the groove sidewall of the brake groove, thereby braking the adapter operating knob.

[0012] In one embodiment, the brake disc has a top side and a bottom side, the top side is the side close to the brake knob, and the bottom side is the side away from the brake knob, the elastic cantilever portion has a bottom surface close to the bottom side, and the disc-shaped body has a top surface close to the top side, and the bottom surface of the elastic cantilever portion is not lower than the top surface of the disc-shaped body.

[0013] In one embodiment, the distance between at least a portion of the elastic overhanging portion and the axis of the fixed shaft is greater than the distance between the edge of the corresponding portion of the disc-shaped body and the axis of the fixed shaft.

[0014] In one embodiment, the disc-shaped body includes a protruding portion protruding toward a groove side wall of the braking groove, and the fixing portion is connected to the protruding portion.

[0015] In one embodiment, a side of the brake arm close to the side wall of the brake groove has the same shape as the side wall of the brake groove.

[0016] In one embodiment, a positioning protrusion is provided on one of the pushing portion and the elastic cantilever portion, and a positioning recess is provided on the other. The positioning protrusion is used to rely on the elastic deformation of the pushing portion and the elastic cantilever portion to embed into the positioning recess to position the starting position and / or end position of rotation of the brake knob.

[0017] In one embodiment, a cavity is provided in the elastic cantilever portion, and the position of the cavity in the circumferential direction of the brake disc corresponds to the positioning protrusion provided at the rotation end position.

[0018] In one embodiment, a limiting boss is provided on the fixing portion, the limiting boss protrudes toward the fixing shaft, and the limiting boss is used to block the rotation of the pushing portion to limit the rotation limit of the brake knob.

[0019] In one embodiment, the limiting boss is fixedly connected to the disc-shaped body at a side close to the disc-shaped body to form a reinforcing rib between the fixing portion and the disc-shaped body.

[0020] In one embodiment, the brake knob includes a knob body, the knob body having a cylindrical portion for being sleeved on the fixed shaft, and a plate portion surrounding the periphery of the cylindrical portion, the cylindrical portion abutting against the disc-shaped body; the pushing portion protrudes from the plate surface of the plate portion on the side close to the brake disc, the pushing portion includes a pushing plate and a rib plate perpendicular to the pushing plate, the pushing plate is an arc-shaped structure convex toward the elastic cantilever portion, the rib plate is located on the side of the pushing plate away from the elastic cantilever portion, and the rib plate is connected between the pushing plate and the knob body for strengthening the pushing plate.

[0021] Beneficial effects of the present invention:

[0022] According to the bending brake structure of the endoscope in some embodiments of the present invention, the fixed shaft can provide an installation base for the brake disc and the brake knob, and the brake disc can be arranged in the brake groove on the side of the adaptation operating knob away from the rope winding wheel. When the brake knob rotates, the pushing portion of the brake knob can adapt to the pushing adapting portion on the elastic cantilever portion, pushing the elastic cantilever portion of the brake disc to expand outward and press against the groove side wall of the brake groove, thereby braking the adaptation operating knob; in this process, since the brake disc includes a disc-shaped main body that is sleeved outside the fixed shaft and positioned along the axial direction of the fixed shaft, and the fixed portion protrudes from the side of the disc-shaped main body facing the notch of the brake groove, the elastic cantilever portion is connected to the fixed portion and extends along the circumference of the disc-shaped main body, so the disc-shaped main body itself can have higher strength, and the brake arm can rely on the joint deformation of the fixed portion and the elastic cantilever portion to achieve abutment against the groove wall of the brake groove, which is beneficial to reducing stress during deformation, thereby facilitating the braking requirements of the bending brake structure with a relatively simple structure and better reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural diagram of the operating knob portion of an embodiment of the bending and braking structure of the endoscope of the present application;

[0024] Figure 2 yes Figure 1 A schematic diagram showing some of the components in an exploded state;

[0025] Figure 3 yes Figure 2 Schematic diagram from another perspective;

[0026] Figure 4 yes Figure 1 A schematic diagram of another part of the components in an exploded state;

[0027] Figure 5 yes Figure 1 AA section view;

[0028] Figure 6 This is a schematic diagram of the assembly state of the rope winding wheel module in the operating handle on the housing;

[0029] Figure 7 yes Figure 6 Exploded diagram of the structure;

[0030] Figure 8 yes Figure 7 Schematic diagram from another perspective;

[0031] Figure 9 It is a structural diagram of the rope winding wheel module in the operating handle;

[0032] Figure 10 yes Figure 9 A schematic diagram of the structure of the inner side wall of the middle shell for connecting with the module base;

[0033] Figure 11 yes Figure 9 A perspective view of the middle module base;

[0034] Figure 12 yes Figure 5 BB cross-sectional view in;

[0035] Figure 13 yes Figure 12 A partial enlarged view of

[0036] Figure 14 is a schematic structural diagram of the second operating knob on the side close to the housing;

[0037] Figure 15 It is a schematic diagram of the structural correspondence between the two axial sides of the brake seat;

[0038] Figure 16 It is a structural diagram of the brake operating member;

[0039] Figure 17 yes Figure 5 The CC section view in the figure;

[0040] Figure 18 yes Figure 17 A partial enlarged view of

[0041] Figure 19 It is a structural diagram of the brake knob on the side close to the second operating knob;

[0042] Figure 20 It is a schematic diagram of the structural correspondence between the two axial sides of the brake disc;

[0043] Figure 21 is a cross-sectional view of the brake knob, the cross section passing through the central axis of the brake knob;

[0044] Figure 22 This is a schematic diagram of the cooperation relationship between the brake operating member and the brake seat in another embodiment of the bending brake structure.

[0045] List of feature names corresponding to the reference numerals in the figures:

[0046] 100, housing; 110, upper housing; 120, lower housing; 130, assembly through hole;

[0047] 200, module base; 210, base plate; 220, enclosure; 221, semicircular portion; 222, straight portion; 230, end plate; 240, axle mounting hole;

[0048] 311, end plate positioning structure; 312, main body positioning structure; 321, shell positioning structure; 322, base positioning structure;

[0049] 410, first traction line; 420, second traction line;

[0050] 510, first operating knob; 511, first braking groove; 512, third cylinder;

[0051] 520, first rope winding wheel;

[0052] 530, first axle;

[0053] 540, brake operating member; 541, second cylinder; 5411, recessed portion; 5412, first pushing portion; 542, handle;

[0054] 550, brake seat; 551, connecting flange; 552, first cylinder; 553, base portion; 5531, avoidance groove; 554, elastic portion; 5541, inner convex portion; 5542, first gradient surface;

[0055] 560, through groove; 561, circumferential groove; 562, axial groove;

[0056] 610, second operating knob; 611, second braking groove;

[0057] 620, second rope winding wheel;

[0058] 630, second axle;

[0059] 640, brake knob; 641, second push portion; 6411, positioning recess; 642, push plate; 6421, rib plate; 643, cylinder portion; 6431, fixing hole; 644, plate portion;

[0060] 650, brake disc; 651, disc-shaped body; 6511, raised portion; 6512, square hole; 652, brake arm; 6521, fixing portion; 6522, limiting boss; 6523, elastic overhang; 6524, second gradient surface; 6525, positioning boss;

[0061] 700, fixed shaft; 710, square shaft segment;

[0062] 810, rope groove; 830, ring groove; 840, snap-fit groove; 850, anti-rotation protrusion; 860, cavity;

[0063] 910, crimping screw; 911, threaded section. DETAILED DESCRIPTION

[0064] The present application is further described in detail below by means of specific embodiments in conjunction with the accompanying drawings. Similar elements in different embodiments are numbered with associated similar elements. In the following embodiments, many detailed descriptions are provided to enable the present application to be better understood. However, those skilled in the art will readily appreciate that some of the features may be omitted in different circumstances, or may be replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification. This is to avoid the core portion of the present application being overwhelmed by excessive descriptions. For those skilled in the art, it is not necessary to describe these related operations in detail. They can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0065] The various embodiments described in the specific implementation manner can be combined in any suitable manner without contradiction. For example, different implementation manners can be formed by combining different embodiments. In order to avoid unnecessary repetition, various possible combinations of the embodiments will not be described separately.

[0066] In addition, the features, operations, or characteristics described in the specification may be combined in any appropriate manner to form various embodiments. Furthermore, the steps or actions in the method description may be reordered or adjusted in a manner readily apparent to those skilled in the art. Therefore, the various sequences in the specification and drawings are provided solely for the purpose of clearly describing a particular embodiment and are not intended to be mandatory, unless otherwise specified.

[0067] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings).

[0068] Embodiments of the bending and braking structure of the endoscope in this application:

[0069] In one embodiment, the bending and braking structure of the endoscope can be used for the operating handle of the endoscope. Those skilled in the art can understand that the endoscope may include an insertion tube assembly and an operating handle, and the proximal end of the insertion tube assembly is connected to the operating handle, and the operating handle is for the user to hold and operate the insertion tube assembly.

[0070] Those skilled in the art will appreciate that the insertion tube assembly can adopt a mature structure commonly used in current endoscopes, which is used to insert into the target position and enable observation of the target position. The insertion tube assembly can often include a main body section, a bending section, and a head end assembly arranged in sequence from the proximal end to the distal end. The main body section is often the longest part of the insertion tube assembly, which is used to connect to the operating handle of the endoscope. The bending section can be provided with a serpentine structure, and a traction line can be connected to the side wall of the serpentine structure. The traction lines can be arranged in pairs, for example, two pairs. Each pair of traction lines can often be distributed 180 degrees along the circumference of the bending section. By pulling the traction line on one side and loosening the traction line on the other side, the bending section can be bent toward the side where the traction line is pulled. A camera module, a lighting module, etc. can be provided on the head end assembly for imaging. In a specific embodiment, the insertion tube assembly can also provide a guide channel for the corresponding instrument so that the instrument can reach the target position.

[0071] The above introduces the architecture of the insertion tube assembly in some embodiments. Its specific structure can refer to the existing structure in the relevant technology. Considering that it has no direct connection with the innovative content of this application and the technical problems to be solved, it will not be repeated here.

[0072] Next, we will focus on the structure of the operating handle.

[0073] Please refer to Figures 1 to 4 In some embodiments, the operating handle includes a shell 100, an operating knob (which may include a first operating knob 510 and a second operating knob 610), a rope winding wheel (which may include a first rope winding wheel 520 and a second rope winding wheel 620) and a bending brake structure (which may include a brake operating member 540 and a brake knob 640).

[0074] In some embodiments, the endoscope housing 100 may include an upper housing 110 and a lower housing 120. The upper housing 110 and the lower housing 120 can be fixed together to form a mounting cavity for mounting corresponding components. The upper housing 110 and the lower housing 120 can be fixed together by ultrasonic welding, snap-fit connection, fastener connection, adhesive bonding, etc. The lower housing 120 also constitutes the mounting base of the bending drive device, capable of mounting the winding pulley, operating knob, and bending brake structure.

[0075] In order to more clearly illustrate the specific implementation methods of this application, in this application, Figure 2 The directions shown by the arrows, such as up and down, are used as reference systems to describe the positional relationship between the corresponding components. The direction definition in the embodiment is only an example and does not limit the embodiments of the present application to be arranged in this way.

[0076] The operating knob and the bending brake structure can be arranged outside the housing 100, and a rope pulley can be arranged inside the housing 100. The operating knob is used to drive the rope pulley to rotate, thereby controlling the bending of the insertion portion of the endoscope. The bending brake structure is used to brake the operating knob, thereby braking the rope pulley.

[0077] It should be noted that the traction lines connected to the aforementioned bending adjustment sections can enter the operating handle along the insertion tube assembly. Each traction line is connected to a corresponding rope pulley, which is rotatably mounted on the operating handle. For example, two first traction lines 410 are connected to the same first rope pulley 520. When the first rope pulley 520 rotates, one of the first traction lines 410 is pulled while the other first traction line 410 is relaxed, thereby achieving the corresponding bending adjustment operation. When the user operates the endoscope to move the endoscope into the patient's body, perform an examination, or perform a treatment, the user can tighten or loosen the corresponding traction line through the operating handle to achieve the purpose of quickly advancing the endoscope and / or capturing images.

[0078] In order to meet more usage requirements, those skilled in the art should know that in some embodiments, the operating handle may also include a circuit board module, a fluid unit, buttons, etc., which can achieve corresponding usage requirements. Considering that they are not directly related to the innovative content of this application and the technical problems to be solved, they will not be elaborated here.

[0079] During the use of an endoscope, when the camera module at the front end of the endoscope is sent to the target location in the body, in order to facilitate the doctor to observe the lesion, capture images, or operate related adapter instruments, the endoscope lens may be fixed at a specific angle to maintain a fixed posture. The control and posture maintenance of the bending section in the endoscope are the core operating parts of the endoscope and play a vital role in the function of the endoscope. These operations are achieved by the operating handle. The following details the structures related to the bending control and posture maintenance of the bending section in the operating handle.

[0080] like Figure 2 and Figure 3 , the figure shows the second operating knob 610 and the corresponding bending brake structure in a disassembled state. Figure 4 , the figure shows the first operating knob 510 and the corresponding bending brake structure in a disassembled state.

[0081] In some embodiments, the structure related to the bending control of the bending section in the operating handle adopts a modular design and can be assembled and debugged separately outside the shell 100, thereby avoiding the inconvenience caused by the narrow space in the shell 100 to assembly and debugging.

[0082] In a specific embodiment, Figures 5 to 9 In some embodiments, the structure related to the bending control of the bending section in the operating handle includes a first winding wheel 520, a first axle 530, a second winding wheel 620, a second axle 630 and a module base 200, and also includes a fixed shaft 700, wherein the fixed shaft 700 can be used to install a bending brake structure for realizing the braking of the second operating knob 610, which will be introduced separately below.

[0083] The first and second rope reels 520 and 620 are respectively used to wind the first and second traction lines 410 and 420. The first and second axles 530 and 630 are respectively used to drive the first and second rope reels 520 and 620 to rotate. The first and second operating knobs 510 and 610 are respectively connected to the first and second axles 530 and 630, allowing the user to drive the corresponding axles to rotate. The driving force for the rotation of the first and second axles 530 and 630 is provided by the first and second operating knobs 510 and 610, respectively.

[0084] The first axle 530 and the first rope pulley 520 are rotatably mounted on the second axle 630, and the first rope pulley 520 is located on one axial side of the second rope pulley 620. The first axle 530 and the first rope pulley 520 can be an integral structure or a separate structure assembled together; similarly, the second axle 630 and the second rope pulley 620 can be an integral structure or a separate structure assembled together. Figure 7 and Figure 8 The figure shows an embodiment in which the first wheel axle 530 and the first rope winding wheel 520 can be an integrated structure. In this case, the rope winding wheel can be formed by a flange at the end of the wheel axle, and a rope groove 810 is provided on the outer peripheral surface of the flange. The traction line can be arranged in the rope groove 810 to avoid detachment from the rope winding wheel.

[0085] In order to realize the pulling of the traction line by the rope winding wheel, the end of the traction line can be fixed on the rope winding wheel, and the fixing method is not limited. In a specific embodiment, please refer to Figure 7 and Figure 8For example, a fixed slot can be provided on the rope reel, and a bent portion can be provided at the end of the traction line. A clamp is fixed to the bent portion, and the clamp is embedded in the fixed slot, so that the end of the traction line can be fixed to the rope reel, so that the rope reel can pull the traction line. The fixed slot can be provided on the bottom wall of the rope slot 810, and a lateral mounting slot can be provided on one end surface of the rope reel. The lateral mounting slot is connected to the fixed slot to facilitate mounting the traction line on the rope reel.

[0086] In order to achieve the connection between the rope wheel, the wheel shaft and the operating knob to transmit the driving force, a torque transmission structure is provided on the wheel shaft. In a specific embodiment, the wheel shaft is a hollow shaft, and a clamping groove 840 is provided on the side wall of the wheel shaft. The clamping groove 840 forms a torque transmission structure. The upper end of the clamping groove 840 passes through the upper end surface of the wheel shaft, and the operating knob can be provided with a wheel shaft connecting hole. The operating knob can be installed on the wheel shaft through the wheel shaft connecting hole. At the same time, a rotation-stopping protrusion 850 (such as Figure 14 ), the anti-rotation protrusion 850 can be embedded in the clamping groove 840, thereby realizing the transmission of torque. Of course, in some other embodiments, the torque transmission structure can also be replaced by any other possible structure, such as providing an anti-rotation plane on the outer circumference of the wheel axle.

[0087] The module base 200 has a rope pulley mounting cavity and an axle mounting hole 240. The first rope pulley 520 and the second rope pulley 620 are arranged in the rope pulley mounting cavity. The first axle 530 is rotatably assembled in the axle mounting hole 240 and extends from the axle mounting hole 240. The first rope pulley 520, the first axle 530, the second rope pulley 620, and the second axle 630 are axially positioned on the module base 200.

[0088] In a specific embodiment, the module base 200 includes a base plate 210 perpendicular to the axis of the wheel axle mounting hole 240, a panel 220 fixed to a side of the base plate 210 away from the assembly through hole, and the first rope pulley 520 and the second rope pulley 620 are located in the area enclosed by the panel 220. The area enclosed by the panel 220 can have a bottom opening facing downward to facilitate the installation of the connected wheel axle and rope pulley. For example, the connected wheel axle and rope pulley can be moved from bottom to top so that the wheel axle can be inserted into the wheel axle mounting hole 240, and the rope pulley can enter the rope pulley mounting cavity. The area enclosed by the panel 220 can have a lateral opening perpendicular to the axis of the wheel axle mounting hole 240. If the rope pulley and the wheel axle adopt a separate structure, the rope pulley can be first installed into the rope pulley mounting cavity through the lateral opening, and then the wheel axle can be inserted through the wheel axle mounting hole 240.

[0089] In a specific embodiment, the enclosure 220 includes a semicircular portion 221 that matches the shape of a portion of the circumference of the rope winding pulley, and further includes straight portions 222 provided at both ends of the semicircular portion 221. The straight portions 222 are arranged along the tangent direction of the end points of the semicircular portion 221. The above-mentioned lateral opening can be formed by the straight portions 222.

[0090] The rope winding wheel module also includes an end plate 230, which is fixed to the side of the enclosure 220 away from the base plate 210, and the rope winding wheel is axially positioned between the end plate 230 and the base plate 210. The end plate 230 is provided to facilitate the positioning of the rope winding wheel. It should be noted that the end plate 230 can be integrally formed with the fixed shaft 700 introduced below, or it can be a separate part. The fixing method between the main body of the module base 200 mainly formed by the base plate 210 and the enclosure 220 and the end plate 230 is not limited. For example, the end plate 230 can be connected to the main body of the module base 200 using end plate fixing screws. In some other embodiments, other fixing methods are also optional, such as snap-on, threaded connection, bonding, welding and the like.

[0091] The end plate 230 can be provided independently of the fixed shaft 700, or it can be integrally formed with or fixedly connected to the fixed shaft 700. In the case where the end plate 230 is integrally formed with or fixedly connected to the fixed shaft 700, to ensure that the fixed shaft 700 is coaxial with the axle mounting hole 240, an end plate positioning structure 311 can be provided on the end plate 230, and a main body positioning structure 312 can be provided on the main body of the module base 200. One of the end plate positioning structure 311 and the main body positioning structure 312 can be a positioning post on the end plate 230 parallel to the axis of the axle mounting hole 240, and the other can be a positioning hole on the end plate 230 into which the positioning post is inserted. It should be noted that in the above embodiment, the fixed shaft 700 is part of the rope winding pulley module and can form an integral module with the module base 200, the first rope winding pulley 520, the second rope winding pulley 620, the first axle 530, and the second axle 630. However, in some other embodiments, the fixed shaft 700 can be independent of the rope winding pulley module. For example, the rope pulley module may include a module base 200, a first rope pulley 520, a second rope pulley 620, a first axle 530, a second axle 630, and an end plate 230. The end plate 230 is provided with a fixed shaft through-hole, and the fixed shaft 700 can pass through the fixed shaft through-hole into the second axle 630 and be separately fixed to the housing 110. The fixing method of the fixed shaft 700 to the housing 110 is not limited. For example, one end of the fixed shaft 700 located inside the housing 110 can be connected to a fixing plate and fixed to a fixing column inside the housing via the fixing plate. Since the first rope pulley 520, the second rope pulley 620, the first axle 530, and the second axle 630 in the rope pulley module can still be pre-assembled in a modular manner outside the housing 110, it can still provide convenience for assembly and debugging.

[0092] In some embodiments, the enclosure 220 blocks the notch of the rope groove 810 to prevent the traction line from escaping from the rope groove 810, which can facilitate the assembly of the traction line.

[0093] To facilitate connection between the modular structure and the housing 100, as well as debugging and maintenance, in some embodiments, the module base 200 and the housing 100 are separate components, and the module base 200 is fixedly assembled to the housing 100. The connection between the module base 200 and the housing 100 can be accomplished in any manner, including, for example, fastener fixation, snap-fit connection, threaded connection, bonding, welding, and the like. In one specific embodiment, the module base 200 is removably secured to the housing 100, for example, by base fixing screws.

[0094] In some embodiments, the housing 100 has a housing positioning structure 321, and the module base 200 has a base positioning structure 322. The housing positioning structure 321 and the base positioning structure 322 are used to define the assembly position of the module base 200 on the housing 100, including defining the position of the module base 200 in a direction perpendicular to the axis of the wheel axle mounting hole 240, and the circumferential position around the axis of the wheel axle mounting hole 240. Exemplarily, one of the housing positioning structure 321 and the base positioning structure 322 is a base positioning column parallel to the axis of the wheel axle mounting hole 240, and the other is a base positioning hole for the base positioning column to be embedded. Please refer to Figure 10 and Figure 11 The housing 100 is provided with two base positioning columns around the axle mounting hole 240, and the module base 200 is provided with corresponding base positioning holes. In addition, the housing 100 and the module base 200 are respectively provided with three screw connection holes for the base fixing screws.

[0095] In the present application, the positioning structure between the module base 200 and the shell 100, the positioning structure between the end plate 230 and the main body of the module base 200, and the positioning structure between the brake seat 550 and the shell 100 described below are conducive to facilitating the assembly of the operating handle while ensuring the assembly accuracy, thereby being more conducive to ensuring the reliable operation of the operating handle.

[0096] like Figure 9 The diagram shows a schematic diagram of a rope pulley module formed after the components including the first rope pulley 520, the first wheel shaft 530, the second rope pulley 620, and the second wheel shaft 630 are assembled on the module base 200. The traction line can be kept in the rope groove 810 on the corresponding rope pulley. After the rope pulley module is independently assembled outside the housing 100, it can be integrally installed on the housing 100 along the axial direction of the first wheel shaft 530 and the second wheel shaft 630 to form a rope pulley module. Figure 6The structure shown. Those skilled in the art will appreciate that the housing 100 can form a mounting opening for the rope winding module to be fixedly assembled along the axial direction of the first axle 530 and the second axle 630. In the illustrated embodiment, the housing 100 includes an upper housing 110 and a lower housing 120. The upper housing 110 is provided with the above-mentioned mounting opening, a portion of which is located on the lower shell wall of the upper housing 110, and a portion of which is located on the lateral shell wall of the upper housing 110. The shape of the mounting opening matches the lower housing 120 for the lower housing 120 to be snapped together, and the rope winding module can be installed to the upper housing 110 through the mounting opening. In some other embodiments, the mounting opening on the housing 100 for installing the rope winding module may also be in other forms, for example, the mounting opening may be completely located on the lower shell wall of the housing 100.

[0097] The second axle 630 and the second rope winding pulley 620 have through-holes at their axes. The fixed shaft 700 passes through the through-holes, and the second axle 630 and the second rope winding pulley 620 are rotatably mounted on the fixed shaft 700. One end of the fixed shaft 700 is fixed to the module base 200, and the other end extends out of the second axle 630. A mounting hole 130 is provided on one sidewall of the housing 100, through which the first axle 530 and the second axle 630 extend. It should be noted that the rotation axis of the first axle 530 can be determined by the second axle 630 and / or the mounting hole 130 in the housing 100 and / or the axle mounting hole 240 in the module base 200, while the rotation axis of the second axle 630 can be determined by the fixed shaft 700 and / or the first axle 530. To reduce friction and facilitate assembly, annular grooves 830 can be provided on the outer circumferences of the fixed shaft 700 and the first axle 530 to reduce the contact area with radially adjacent components.

[0098] After the rope winding pulley module is installed on the housing 100, the first wheel shaft 530, the second wheel shaft 630, and the fixed shaft 700 all extend out of the housing 100 through the assembly through-hole 130 on the housing 100 to connect the operating knobs and the bending brake structure related to posture maintenance. The operating knobs include the first operating knob 510 and the second operating knob 610, and the bending brake structure includes the brake operating member 540, the brake knob 640, the brake disc 650, and the brake seat 550.

[0099] Among them, please refer to Figure 5The brake knob 640 and the second operating knob 610 are both mounted on the outside of the fixed shaft 700. It should be noted that the brake knob 640 and the second operating knob 610 can be mounted directly on the fixed shaft 700, or mounted on other components disposed outside the fixed shaft 700. For example, the second operating knob 610 can be mounted on the first axle 530. The brake knob 640 is rotatably mounted on the end of the fixed shaft 700 away from the housing 100. The brake knob 640 is used to lock and unlock the second operating knob 610. Along the axial direction of the fixed shaft 700, the first operating knob 510 is positioned between the housing 100 and the second operating knob 610, and the second operating knob 610 is positioned between the first operating knob 510 and the brake knob 640. The brake knob 640 is positioned on the fixed shaft 700. Furthermore, the brake operating member 540 is an operating handle including a cantilevered handle portion 542. The operating handle is disposed between the first operating knob 510 and the housing 100.

[0100] In a specific embodiment, please refer to Figure 3 and Figure 5 The bending control system also includes a crimping screw 910, which is used to axially position the brake knob 640 on the fixed shaft 700; the crimping screw 910 includes a threaded section 911, which is threadedly connected to the fixed shaft 700, and the head of the crimping screw 910 is used to abut the edge of the hole of the fixing hole 6431 at one end away from the fixed shaft 700, thereby realizing the axial positioning of the brake knob 640, the second operating knob 610, and the first operating knob 510.

[0101] Please refer to Figure 5 In a specific embodiment, the first operating knob 510 includes a first sleeve portion that is rotatably mounted on the first axle 530, and the second operating knob 610 includes a second sleeve portion that is rotatably mounted on the second axle 630. The first sleeve portion has a first end surface at one end proximate to the second operating knob 610, and the second sleeve portion has a second end surface at one end proximate to the first operating knob 510. The first end surface includes an annular support portion and an annular staggered portion radially inward of the annular support portion. The annular support portion supports the second end surface, and the annular staggered portion faces the inner cavity of the second sleeve portion. The first operating knob 510 and the second operating knob 610 are axially positioned by the annular support portion. This structure can reduce the contact area between the first and second operating knobs 510 and reduce friction during relative rotation.

[0102] With the above arrangement structure, the operating knob and the bending brake structure related to posture maintenance can be assembled with the housing 100 and the rope winding wheel module in sequence along the axial direction of the operating knob, which is convenient for disassembly, assembly and debugging.

[0103] Of course, in some other embodiments, the rope pulley and the axle can also be directly assembled to the shell 100. For example, the module base 200 and the shell 100 are integrally formed, that is, the module base 200 can be a part of the shell 100. In this case, if the fixed shaft 700 needs to be assembled, the fixed shaft 700 can be directly fixed to the shell 100.

[0104] like Figure 4 and Figure 5 The brake operating member 540 and the brake seat 550 are adapted to the first operating knob 510. The specific structure will be referred to below. Figures 12 to 16 Give a detailed introduction.

[0105] like Figure 2 、 Figure 3 and Figure 5 The brake knob 640 and the brake disc 650 are adapted to the second operating knob 610. The specific structure will be referred to below. Figures 17 to 21 Give a detailed introduction.

[0106] In the embodiment of the present application, a fixed brake seat 550 includes a first cylindrical body 552, on which is disposed an elastic portion 554 extending circumferentially along the first cylindrical body 552, and on which is disposed a tapered surface. The brake operating member 540 includes a second cylindrical body 541, which is at least partially embedded in the first cylindrical body 552 and is provided with a push portion. Both the brake seat 550 and the brake operating member 540 utilize a cylindrical structure, which helps ensure their structural strength and thus improve braking reliability. In some embodiments, the brake seat 550 can be made of materials such as PC, ABS, or PP, and can be integrally formed using a plastic mold.

[0107] Please refer to Figure 4 、 Figure 5 、 Figures 12 to 16 Regarding the braking of the first operating knob 510, in a specific embodiment, the brake seat 550 is fixed to the upper part of the shell 100, and the first cylinder 552 of the brake seat 550 includes a base portion 553 and an elastic portion 554. The elastic portion 554 is located at the top of the brake seat 550, and the elastic portion 554 is separated from the base portion 553 along both sides of the axial direction of the first cylinder 552. The elastic portion 554 extends along the circumference of the first cylinder 552 so as to be able to produce elastic outward expansion deformation.

[0108] In a specific embodiment, the brake seat 550 includes a connecting flange 551, which is connected to the outer peripheral surface of the first cylinder 552 and is arranged at the end of the first cylinder 552 away from the operating knob. The connecting flange 551 is provided with a positioning structure for positioning on a corresponding mounting base (for example, the above-mentioned housing 100). The positioning structure can also be in the form of a positioning column adapted to a positioning hole, and reference can be made to the end plate positioning column and the base positioning column mentioned above. The fixation of the brake seat 550 to the housing 100 can also be achieved by fasteners. An opening for the handle 542 of the brake operating member 540 to extend out can be provided on the connecting flange 551 of the brake seat 550, and can limit the rotation range of the brake operating member 540.

[0109] In one specific embodiment, the first cylindrical body 552 is provided with a through groove 560. The through groove 560 includes a circumferential groove 561 arranged along the circumference of the first cylindrical body 552 and an axial groove 562 arranged along the axial direction of the first cylindrical body 552. The axial groove 562 and the circumferential groove 561 are connected, so that the elastic portion 554 forms a cantilever structure. In some other embodiments, the elastic portion 554 can be located between the axial ends of the base portion 553, and the circumferential groove 561 can be provided on both the upper and lower sides of the elastic portion 554. In some other embodiments, only the axial groove 562 can be provided. In this case, the middle portion of the elastic portion 554 can undergo elastic deformation, while the two end portions are connected to the base portion 553. It should be noted that the elastic portion 554 extending along the circumference of the first cylindrical body 552 means that the elastic portion 554 has an extension along the circumference of the first cylindrical body 552. The elastic portion 554 can be perpendicular to the axis of the first cylindrical body 552 or can be inclined relative to the axis of the first cylindrical body 552. The number of the elastic parts 554 on the first cylinder 552 can be greater than or equal to 2. Figure 15 , the number of the elastic parts 554 on the first cylinder 552 can be three.

[0110] The first operating knob 510 is adapted to mate with the brake seat 550. A first brake groove 511 is defined on the side of the first operating knob 510 that is adjacent to the housing 100. At least a portion of the first cylinder 552 is embedded in the first brake groove 511. The brake operating member 540 may include a handle 542 and a rotatable second cylinder 541. At least a portion of the second cylinder 541 is embedded in the first cylinder 552.

[0111] Please refer to Figure 13 and Figure 15 The elastic portion 554 has a first gradient surface 5542 on one side close to the central axis of the first cylinder 552, along the braking rotation direction of the braking operating member 540 when the braking operating knob is turned, for example Figure 13 In the counterclockwise direction, the first gradual surface 5542 gradually approaches the central axis of the first cylinder 552. Figure 13 and Figure 16 A first pushing portion 5412 is provided on the outer circumference of the second cylindrical body 541. The first pushing portion 5412 is configured to press against the first gradually changing surface 5542 when the brake operating member 540 rotates in the braking rotation direction, causing the elastic portion 554 to expand outward and abut against the sidewall of the first braking groove 511, thereby braking the first operating knob 510. The first gradually changing surface 5542 on the elastic portion 554 forms a pushing adapter portion, which can cause the elastic portion 554 to expand and deform outward under the action of the pushing portion.

[0112] The first gradual surface 5542 on the elastic portion 554 can be a continuous surface or a discontinuous surface. For example, a groove can be provided on the side of the elastic portion 554 close to the central axis of the first cylinder 552, and the first gradual surface 5542 can have a first portion and a second portion located on both sides of the groove along the axial direction of the first cylinder 552. In the above embodiment, the second cylinder 541 and the first cylinder 552 are coaxially arranged, which is conducive to adapting to the situation where the groove side wall profile of the elastic portion 554 and the first braking groove 511 are similar, and the layout is compact. In some other embodiments, the second cylinder 541 and the first cylinder 552 can also be eccentrically arranged, such as Figure 22 When the second cylinder 541 is eccentrically arranged with respect to the first cylinder 552, the distance between the pushing portion and the rotation axis of the first cylinder 552 can also be varied to compress the pushing adapter portion on the first cylinder 552, causing the elastic portion to expand outward and press against the sidewalls of the braking groove. Furthermore, the number of both the pushing portion and the pushing adapter portion can be one, two, or more than three.

[0113] In a specific embodiment, please refer to Figure 13 The elastic portion 554 is provided with an inner convex portion 5541, which is convex toward the inside of the first cylinder 552 relative to the cylindrical surface where the inner wall of the base portion 553 is located (a part of the cylindrical surface is shown as a double-dotted line of the convex column), and the first gradual surface 5542 is formed by the inner convex portion 5541. Figure 16 The outer circumferential surface of the second cylinder 541 is provided with a recessed portion 5411. When the brake operating member 540 is in the brake release state, the recessed portion 5411 is used to accommodate the inner convex portion 5541. For example, in a direction opposite to the braking rotation direction, the surface of the recessed portion 5411 gradually approaches the axis of the second cylinder 541. Around the circumference of the second cylinder 541, one side of the surface of the recessed portion 5411 smoothly connects to the outer circumferential surface of the adjacent portion of the second cylinder 541, while the other side forms a step with the outer circumferential surface of the adjacent portion of the second cylinder 541. In this case, the first pushing portion 5412 on the brake operating member 540 can be formed by the connection between the surface of the recessed portion 5411 and the outer circumferential surface of the second cylinder 541. Providing the recessed portion 5411 to accommodate the inner convex portion 5541 facilitates the fit between the brake operating member 540 and the brake seat 550, thereby improving structural stability and braking effect.

[0114] Please refer to Figure 5 In some embodiments, in the axial direction of the first cylinder 552, the size of the recessed portion 5411 is not less than the size of the first gradient surface 5542. This is conducive to forming a larger matching area between the brake operating member 540 and the elastic portion 554 of the brake seat 550, thereby improving the braking effect and helping to reduce the requirements for assembly accuracy.

[0115] The second cylindrical body 541 is rotatably assembled within the first cylindrical body 552 by virtue of the cooperation between its outer circumferential surface and the inner wall surface of the first cylindrical body 552. This interaction between the second cylindrical body 541 and the first cylindrical body 552 ensures a stable shape and improved structural stability. In some embodiments, the recessed portion 5411 on the second cylindrical body 541 is located on one axial side of the second cylindrical body 541. The outer circumferential surface of the second cylindrical body 541 adjacent to the recessed portion 5411 along the axial direction of the second cylindrical body 541 can further ensure the structural stability of the second cylindrical body 541 and the first cylindrical body 552.

[0116] The rotatable angle range of the brake operating member 540 can be determined based on the specific shapes and dimensions of the first pushing portion 5412 and the first gradually changing surface 5542. For example, the rotatable angle range of the brake operating member 540 can be 25 to 30 degrees. When the brake operating member 540 rotates in the braking rotation direction, the first pushing portion 5412 of the brake operating member 540 and the first gradually changing surface 5542 of the brake seat 550 abut against each other and undergo a certain degree of elastic deformation, thereby applying a force radially outward from the first cylinder 552 to the elastic portion 554, causing the elastic portion 554 to expand outward and abut against the sidewalls of the first brake groove 511.

[0117] To ensure that the brake operating member 540 exerts sufficient force on the elastic portion 554 while facilitating rotation of the brake operating member 540, in some embodiments, a cavity 860 is defined within the elastic portion 554. Around the circumference of the first cylinder 552, at least one cavity 860 is located at the portion of the elastic portion 554 where the first gradual surface 5542 is defined. The cavity 860 can elastically deform when the portion of the elastic portion 554 where the first gradual surface 5542 is defined is squeezed, reducing its radial dimension and thereby preventing the brake operating member 540 from becoming stuck.

[0118] Within the rotatable angle range of the brake operating member 540 , at least a portion of the inner convex portion 5541 is located within the recessed portion 5411 , which is beneficial to maintaining the rotational matching relationship between the outer circumferential surface of the second cylinder 541 and the inner wall surface of the first cylinder 552 .

[0119] In order to achieve the installation of the brake operating member 540, in some embodiments, an avoidance groove 5531 is provided at one end of the first cylinder 552 away from the bottom of the first brake groove 511, and the handle 542 of the brake operating member 540 extends from the avoidance groove 5531 to the outside of the first cylinder 552.

[0120] The first operating knob 510 includes a third barrel 512, which is used to achieve axial positioning of the first operating knob 510 and connect the first operating knob 510 to the first axle 530. The third barrel 512 is located within the second barrel 541, and a gap is formed between the outer circumference of the third barrel 512 and the inner wall of the second barrel 541. This gap prevents the brake operating member 540 from interfering with the rotation of the first operating knob 510. To ensure the structural strength of the third barrel 512, an oblique reinforcing rib 6421 can be provided radially outwardly of the third barrel 512.

[0121] In the above embodiment, the outward expansion deformation of the elastic portion 554 is achieved between the brake seat 550 and the brake operating member 540 by means of a first gradual surface, and the distances between each portion of the first gradual surface and the central axis of the first cylinder 552 vary smoothly along the circumference of the operating knob. In some other embodiments, the first gradual surface can also be replaced with a stepped surface, and the distances between each step portion of the stepped surface and the central axis of the first cylinder 552 vary in a stepwise manner along the circumference of the operating knob, which can also achieve outward expansion deformation of the elastic portion. In addition, a gradual surface can be provided on the brake operating member 540 as a push portion, and a protrusion corresponding to the gradual surface can be provided on the brake seat 550 as a push adapter.

[0122] For details on the braking of the second operating knob 610, please refer to Figure 2 、 Figure 3 、 Figure 5 、 Figures 17 to 21 In a specific embodiment, the second operating knob 610 is braked by a brake knob 640 and a brake disc 650 mounted on the fixed shaft 700. The brake knob 640 is mounted on the fixed shaft 700 and can rotate around the fixed shaft 700. The brake disc 650 is mounted on the fixed shaft 700 and is positioned along the circumference of the fixed shaft 700. The second operating knob 610 is an adaptable operating knob that is compatible with the brake knob 640.

[0123] In some embodiments, the second operating knob 610 is located axially on one side of the brake knob 640. A second brake groove 611 is defined on the side of the second operating knob 610 proximal to the brake knob 640, and a brake disc 650 is disposed within the second brake groove 611. The brake disc 650 includes a disc-shaped body 651 and at least one brake arm 652. The disc-shaped body 651 is sleeved on the fixed shaft 700 and positioned circumferentially of the fixed shaft 700. The brake arm 652 includes a fixed portion 6521 and an elastic overhanging portion 6523. The fixed portion 6521 protrudes from the side of the disc-shaped body 651 facing the notch of the brake groove. The elastic overhanging portion 6523 is connected to the fixed portion 6521 and extends circumferentially of the disc-shaped body 651. The side of the elastic overhanging portion 6523 facing away from the sidewall of the brake groove has a second gradually changing surface 6524 that gradually approaches the fixed shaft 700. A square hole 6512 may be provided at the center of the disc-shaped body 651, and a matching square shaft section 710 may be provided at the upper end of the fixed shaft 700, thereby positioning the disc-shaped body 651 along the circumference of the fixed shaft 700. It should be noted that the disc-shaped body 651 may be a circular disc structure, or a disc structure of other shapes, such as a triangle, square, or ellipse, or a disc structure with irregular edges.

[0124] The brake knob 640 has a second pushing portion 641 disposed on the side of the elastic overhang 6523 proximal to the fixed shaft 700. The elastic overhang 6523 includes a second tapered surface 6524 disposed on the side facing away from the sidewall of the second braking groove 611. The second tapered surface 6524 constitutes a pushing adapter. The second pushing portion 641 is configured to press against the second tapered surface 6524 when the brake knob 640 is rotated in a corresponding direction, causing the elastic overhang 6523 to expand outward and abut against the sidewall of the second braking groove 611, thereby braking the second operating knob 610. In some embodiments, the brake knob 640 includes a knob body comprising a cylindrical portion 643 for sleeved onto the fixed shaft 700, a plate portion 644 surrounding the cylindrical portion 643, and the cylindrical portion 643 abutting against the disc-shaped body 651. The second pushing portion 641 protrudes from the plate surface of the plate portion 644 proximal to the brake disc 650. Because only the top end of the second pushing portion 641 is connected to the plate portion 644 of the knob body, and the second pushing portion 641 needs to withstand a large radial force acting on the brake knob 640 during braking, the second pushing portion 641 can include a pushing plate 642 and a rib 6421 perpendicular to the pushing plate 642. The pushing plate 642 has an arc-shaped structure that convexly faces the elastic overhang 6523. The rib 6421 is located on the side of the pushing plate 642 away from the elastic overhang 6523 and is connected between the pushing plate 642 and the knob body. The arc-shaped structure itself can improve the structural stability of the second pushing portion 641 when subjected to radial force, and the rib 6421 can also strengthen the pushing plate 642, thereby improving the braking stability of the second operating knob 610.

[0125] Regarding the braking structure between the brake knob 640 and the brake disc 650, in some other embodiments, similar to the braking structure between the brake seat 550 and the brake operating member 540, the second gradual surface 6524 can also be replaced with a stepped surface, and the distance between each step portion of the stepped surface and the central axis of the brake knob 640 changes in a stepwise manner along the circumference of the brake knob 640, which can also achieve outward expansion deformation of the elastic overhang 6523. In addition, for example, a gradual surface or a stepped surface can also be provided on the brake knob 640 as a pushing portion, and a protrusion corresponding to the gradual surface or the stepped surface can be provided on the elastic overhang 6523 of the brake disc 650 as a pushing adapter.

[0126] The brake disc 650 is provided with a disc-shaped main body 651, which can have a high structural strength, thereby being beneficial to ensuring the stability of the brake structure and providing a greater braking force.

[0127] In some embodiments, the elastic overhang 6523 is connected to one side of the fixed portion 6521 along the circumference of the disc-shaped body 651. This structure is more conducive to reducing stress during deformation, improving structural strength, and improving service life. In some other embodiments, the elastic overhang 6523 can also be connected to one side of the fixed portion 6521 along the radial direction of the disc-shaped body 651.

[0128] The top side (i.e., the upper side) of the brake disc 650 is the side close to the brake knob 640, and the bottom side (i.e., the lower side) is the side away from the brake knob 640. The elastic overhang 6523 has a bottom surface close to the bottom side, and the disc-shaped body 651 has a top surface close to the top side. The bottom surface of the elastic overhang 6523 is not lower than the top surface of the disc-shaped body 651, which is conducive to ensuring the elastic deformation performance of the elastic overhang 6523 and the stability of the stress between the fixed part 6521 during elastic deformation.

[0129] The distance between at least a portion of the elastic overhang 6523 and the axis of the fixed shaft 700 is greater than the distance between the corresponding edge of the disc-shaped body 651 and the axis of the fixed shaft 700. That is, at least a portion of the elastic overhang 6523 is located radially outward of the disc-shaped body 651. This structure prevents the portion of the disc-shaped body 651 corresponding to the elastic overhang 6523 from contacting the inner sidewall of the second braking groove 611, thereby preventing smooth rotation of the second operating knob 610. It also facilitates axial demolding of the brake disc 650, facilitating manufacturing. To facilitate the placement of the elastic overhang 6523, the disc-shaped body 651 may include a raised portion 6511 projecting toward the sidewall of the braking groove, with the fixed portion 6521 connected to the raised portion 6511.

[0130] In some embodiments, the side of the brake arm 652 close to the side wall of the brake groove is consistent with the shape of the side wall of the brake groove. For example, the side of the brake arm 652 close to the side wall of the brake groove is in an arc shape, and the side wall of the brake groove is also in an arc shape with equal diameter. This is conducive to achieving braking by relying on smaller deformation, and can form a larger contact friction area between the brake groove and the brake groove during braking, thereby improving braking stability.

[0131] In order to better prevent the second gradual surface 6524 and the second pushing portion 641 from slipping and causing accidental brake failure, in some embodiments, a positioning protrusion 6525 is provided on one of the second pushing portion 641 and the elastic overhang portion 6523, and a positioning recess 6411 is provided on the other. The positioning protrusion 6525 is used to rely on the elastic deformation of the second pushing portion 641 and the elastic overhang portion 6523 to embed into the positioning recess 6411 to locate the rotation starting position and / or rotation end position of the brake knob 640. Please refer to Figure 18 and Figure 20 In a specific embodiment, a positioning recess 6411 may be provided on the second pushing portion 641, and a positioning protrusion 6525 may be provided on the elastic overhang portion 6523. Similar to the cavity 860 provided on the brake seat 550 corresponding to the first operating knob 510, in some embodiments, a cavity 860 is provided within the elastic overhang portion 6523. The position of the cavity 860 along the circumference of the brake disc 650 corresponds to the positioning protrusion 6525 provided at the end of rotation. The provision of the cavity 860 facilitates elastic deformation of the elastic overhang portion 6523, facilitating the mating of the positioning protrusion 6525 with the positioning recess 6411 while maintaining a certain pushing force.

[0132] If the brake knob 640 rotates excessively, the second pushing portion 641 may exceed its designated range of motion, affecting the reliable operation of the brake knob 640. To avoid this problem, in some embodiments, a limiting boss 6522 is provided on the fixing portion 6521. The limiting boss 6522 protrudes toward the fixing shaft 700 and is used to block the rotation of the second pushing portion 641, thereby limiting the rotational limit of the brake knob 640. In some embodiments, the side of the limiting boss 6522 closest to the disc-shaped body 651 may be fixedly connected to the disc-shaped body 651, forming a reinforcing rib between the fixing portion 6521 and the disc-shaped body 651, thereby ensuring the structural reliability of the brake arm 652.

[0133] In some of the above-mentioned embodiments, the operating handle is provided with both a first operating knob 510 and a second operating knob 610, and each of the first operating knob 510 and the second operating knob 610 is provided with a corresponding bending brake structure. Those skilled in the art will appreciate that in some other embodiments, in some cases, the operating handle may be provided with only one operating knob as required. In this case, although the user can achieve temporary braking by manually holding the operating knob, a corresponding bending brake structure may also be provided for this single operating knob.

[0134] The above specific examples are used to illustrate the present application, which is only used to help understand the present application and is not intended to limit the present application. For those skilled in the art of the present application, based on the concept of the present application, they can also make some simple deductions, modifications or substitutions.

Claims

1. The bending and braking structure of the endoscope is characterized by: include: Fixed axis for fixed settings; a brake knob sleeved outside the fixed shaft; An adapting operating knob is sleeved outside the fixed shaft and adapted to the brake knob, and is used to control the degree of bending of the insertion portion of the endoscope when rotated; the adapting operating knob is located on one axial side of the brake knob, and a brake groove is provided on the side of the adapting operating knob close to the brake knob; and a brake disc disposed in the brake groove, the brake disc comprising a disc-shaped body and at least one brake arm, the disc-shaped body being sleeved on the fixed shaft and positioned along the circumference of the fixed shaft, the brake arm comprising a fixed portion and an elastic overhanging portion, the fixed portion protruding from a side of the disc-shaped body facing the notch of the brake groove, the elastic overhanging portion being connected to the fixed portion and extending along the circumference of the disc-shaped body; The brake knob has a pushing portion arranged on the side of the elastic cantilever portion close to the fixed axis, and the elastic cantilever portion includes a pushing adapter portion arranged on the side of the groove sidewall away from the brake groove. The pushing portion is used to squeeze the pushing adapter portion when the brake knob rotates in the corresponding direction, so that the elastic cantilever portion expands outward and presses against the groove sidewall of the brake groove, thereby braking the adapter operating knob.

2. The bending brake structure according to claim 1, characterized in that: The brake disc has a top side and a bottom side, the top side is the side close to the brake knob, and the bottom side is the side away from the brake knob. The elastic cantilever has a bottom surface close to the bottom side, and the disc-shaped body has a top surface close to the top side. The bottom surface of the elastic cantilever is not lower than the top surface of the disc-shaped body.

3. The bending brake structure according to claim 1, characterized in that: The distance between at least a portion of the elastic overhanging portion and the axis of the fixed shaft is greater than the distance between the edge of the corresponding portion of the disc-shaped body and the axis of the fixed shaft.

4. The bending brake structure according to claim 3, characterized in that: The disc-shaped body includes a protruding portion protruding toward a groove side wall of the braking groove, and the fixing portion is connected to the protruding portion.

5. The bending brake structure according to any one of claims 1 to 4, characterized in that: A side of the brake arm close to the groove side wall of the brake groove is consistent with the shape of the groove side wall of the brake groove.

6. The bending brake structure according to any one of claims 1 to 4, characterized in that: A positioning protrusion is provided on one of the pushing portion and the elastic cantilever portion, and a positioning recess is provided on the other. The positioning protrusion is used to rely on the elastic deformation of the pushing portion and the elastic cantilever portion to embed into the positioning recess to locate the rotation starting position and / or rotation end position of the brake knob.

7. The bending brake structure according to claim 6, characterized in that: A cavity is provided in the elastic overhang portion, and a position of the cavity in the circumferential direction of the brake disc corresponds to the positioning protrusion provided at the rotation end position.

8. The bending brake structure according to any one of claims 1 to 4, characterized in that: A limiting boss is provided on the fixing portion, the limiting boss protruding toward the fixing shaft, and the limiting boss is used to block the rotation of the pushing portion to limit the rotation limit of the brake knob.

9. The bending brake structure according to claim 8, characterized in that: The side of the limiting boss close to the disc-shaped body is fixedly connected to the disc-shaped body to form a reinforcing rib between the fixing portion and the disc-shaped body.

10. The bending brake structure according to any one of claims 1 to 4, characterized in that: The brake knob includes a knob body, which has a cylindrical portion for being sleeved on the fixed shaft and a plate portion surrounding the periphery of the cylindrical portion, and the cylindrical portion abuts against the disc-shaped body; the pushing portion protrudes from the plate surface of the plate portion on the side close to the brake disc, and the pushing portion includes a pushing plate and a rib plate perpendicular to the pushing plate, the pushing plate is an arc-shaped structure convex toward the elastic cantilever portion, the rib plate is located on the side of the pushing plate away from the elastic cantilever portion, and the rib plate is connected between the pushing plate and the knob body for strengthening the pushing plate.

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