A rope retraction mechanism

Abstract

This utility model relates to the field of endoscope technology, specifically to a cable retraction mechanism, comprising: a cable support with a cable fixing position for fixing the cable; a cable reel with a rotating mounting position and a cable support fixing position; the cable support is rotatably mounted in the rotating mounting position to allow it to rotate independently; the cable support fixing position secures the cable support in the rotating mounting position to prevent it from rotating within the rotating mounting position; the cable reel drives the cable support to rotate synchronously to retract or release the cable. When the cable reel is in its initial position, rotating the cable support can re-tension the slack cable and restore the serpentine skeleton to a straight state, thereby calibrating the mapping relationship between the cable reel rotation angle and the serpentine skeleton bending angle and improving the accuracy of serpentine skeleton bending adjustment.

Description

Technical Field

[0001] This utility model relates to the field of endoscope technology, specifically to a rope retraction mechanism. Background Technology

[0002] An industrial endoscope is a non-destructive testing (NDT) tool that uses optical or electronic imaging technology to directly observe the internal condition of equipment (such as engines, pipes, and turbines). One of its core functions is guidance, which allows the operator to control the bending of the distal probe to bypass obstacles and reach the inspection area, as well as to observe from different angles.

[0003] The guiding function is usually achieved through a "tungsten wire pull rope" mechanism. The specific principle is as follows: at the front end of the endoscope insertion part is a flexible snake bone, and four tungsten wires are connected around the snake bone. The other end of the tungsten wires extends backward to the operating part. By pulling the tungsten wires, the front snake bone bends in the corresponding direction.

[0004] Traditional industrial endoscopes mostly use manual knobs to control the bending of the serpentine frame. When the knob is turned, the mechanical structure inside the endoscope, such as gears, converts the rotational force of the knob into a linear tension force acting on the tungsten wire rope. Under the tension of the tungsten wire rope, the serpentine frame segment is driven to bend. However, manually controlling the bending of the serpentine wire using a knob is laborious and makes it difficult to precisely control the rotation angle and direction of the serpentine segment, significantly affecting the accuracy and comprehensiveness of the inspection. Therefore, those skilled in the art have gradually replaced traditional manual guide mechanisms with electrically driven guide mechanisms. For example, an endoscope disclosed in CN119781159 A uses a micro motor (such as a stepper motor or servo motor) as a power source. The motor converts high-speed, low-torque output into low-speed, high-torque output through a reduction gear set, ultimately driving the gear that winds the tungsten wire to rotate. Based on the mapping relationship between the gear rotation angle and the serpentine wire bending angle, the winding and unwinding length of the tungsten wire can be controlled by controlling the gear rotation angle, thereby precisely controlling the bending direction and angle of the serpentine wire and achieving multi-degree-of-freedom movement of the probe section.

[0005] The problem with the aforementioned electrically driven guide mechanism is that after prolonged use, the mapping relationship between the gear rotation angle and the snake bone bending angle will deviate, resulting in a decrease in the accuracy of snake bone bending adjustment. Utility Model Content

[0006] 1. The problem to be solved In view of the problem that the mapping relationship between the gear rotation angle and the snake bone bending angle will deviate after long-term use in the existing technology, this utility model provides a rope pulling and releasing mechanism that can calibrate the deviation.

[0007] 2. Technical Solution To solve the above problems, the technical solution adopted by this utility model is as follows: A rope retraction mechanism, comprising: The rope support has a rope fixing position for fixing the pull rope; The rope reel is equipped with a rotating mounting position and a rope support fixing position. in: The rope support is rotatably installed in the rotatable mounting position, allowing the rope support to rotate independently relative to the rope disc to tension the pull rope; The rope support is provided with a fixing part, which is used to cooperate with the rope support fixing position to fix the rope support in the rotating installation position, so that the rope support and the rope reel are relatively stationary. The rope reel is used to drive the rope holder to rotate synchronously in order to wind up or release the rope.

[0008] As a preferred embodiment of this utility model, the rotating mounting position is a mounting cavity configured on the rope reel, and the rope support is configured in the mounting cavity. The mounting cavity is open at one end, and a limiting part is provided at the open end to restrain the rope support within the mounting cavity.

[0009] As a preferred embodiment of this utility model, the rope reel includes a transmission plate and a transmission frame, the transmission plate and the transmission frame are coaxially fixed, and the side of the transmission plate away from the transmission frame is used to connect to a rotating power source. The mounting groove on the transmission plate and the mounting hole on the transmission frame together form the mounting cavity, and the mounting groove and the mounting hole are coaxially arranged. The limiting part is located on the side of the mounting hole away from the transmission plate.

[0010] As a preferred embodiment of this utility model, the limiting part is provided with a plurality of positioning grooves arranged in a ring, the plurality of positioning grooves constitute the rope support fixing position, and the fixing part is configured as a locking block disposed at the front end of the rope support. The rope support can move axially within the rotating mounting position to engage or disengage the locking block from the positioning groove.

[0011] As a preferred embodiment of this utility model, the limiting part is configured as a limiting ring coaxially arranged with the mounting cavity, and multiple positioning grooves are evenly distributed on the inner diameter edge of the limiting ring.

[0012] As a preferred embodiment of this utility model, multiple positioning grooves are arranged continuously along the inner diameter edge of the limiting ring.

[0013] As a preferred embodiment of this utility model, the length of the mounting cavity is greater than the length of the rope support, and an elastic element is provided in the mounting cavity. The elastic element can drive the rope support to move axially within the rotating mounting position so that the locking block can engage or disengage from the positioning groove.

[0014] As a preferred embodiment of this utility model, the tail end of the rope support is provided with a spring groove, and the elastic element is disposed in the spring groove.

[0015] As a preferred embodiment of this utility model, a rope-supporting plate is fixedly configured between the transmission plate and the transmission frame, and the side of the rope-supporting plate away from the center of the rope disc is set as an arc-shaped surface. The arc-shaped surfaces of the transmission plate, transmission frame, and rope support plate form a rope groove for constraining the pull rope, and the rope groove is connected to the rotating mounting position.

[0016] As a preferred embodiment of this utility model, the pull rope fixing position is set as a fixing hole that passes through the rope support. The fixing hole is used for the pull rope to pass through, and a stop part is provided in the fixing hole. The stop part is used to lock the clip at the end of the pull rope.

[0017] As a preferred embodiment of this utility model, one end of the rope holder is provided with a rotation operation position.

[0018] As a preferred embodiment of this utility model, there are two rope reels, each rope reel being equipped with two rope supports, two rotating mounting positions, and two rope support fixing positions; the two rope supports are respectively installed in the corresponding rotating mounting positions, and the two rope support fixing positions are used to fix the corresponding rope supports.

[0019] 3. Beneficial effects Compared with the prior art, the beneficial effects of this utility model are as follows: This invention features a rotatable rope support on the rope reel, which fixes the end of the pull rope. When the rope reel is in its initial position, rotating the rope support can re-tension the slack pull rope and restore the snake bone to a straight state. This calibrates the mapping relationship between the rotation angle of the rope reel and the bending angle of the snake bone, thereby improving the accuracy of snake bone bending adjustment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram showing the distribution of the two rope reels in this utility model; Figure 2 This is a schematic diagram of the rope reel and motor in this utility model; Figure 3 for Figure 2 A diagram from another perspective; Figure 4 This is a schematic diagram showing the disassembly of the rope reel in this utility model; Figure 5 for Figure 4 Enlarged schematic diagram of the central transmission frame; Figure 6 for Figure 4 A schematic diagram of the rear structure; Figure 7 This is a schematic diagram of the internal structure of the rope reel and rope support in this utility model; Figure 8 This is a cross-sectional schematic diagram of the rope support in this utility model; Figure 9 for Figure 8 A cross-sectional view of the middle rope support after the pull rope is installed.

[0021] Explanation of the labels in the diagram: 100. Rope support; 110. Rope fixing position; 120. Fixing part; 130. Spring groove; 140. Rotation operation position; 200. Rope reel; 210. Rotating mounting position; 211. Mounting groove; 212. Mounting hole; 220. Rope support fixing position; 230. Limiting part; 240. Rope support plate; 241. Arc-shaped surface; 250. Rope groove; 260. Transmission frame; 270. Transmission plate; 280. Slot; 290. Threaded cylinder; 300. Pull rope; 310. Clip; 400. Rotary power source; 410. Turntable; 500. Elastic components. Detailed Implementation

[0022] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.

[0023] The structures, proportions, and sizes illustrated in the accompanying drawings are solely for illustrative purposes and to aid those skilled in the art in understanding and reading the invention. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of implementation. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0024] This embodiment provides a rope retraction mechanism, including a rope support 100 and a rope reel 200. The rope support 100 is provided with a rope fixing position 110. One end of the rope 300 is fixed to the rope fixing position 110, and the other end is connected to the probe of an endoscope. The rope support 100 is mounted on the rope reel 200, and the rope reel 200 is fixedly mounted to the output shaft of a rotary power source 400. The rotary power source 400 can be configured as a servo motor. The rope reel 200 is driven to rotate by the rotary power source 400 to tighten or loosen the rope 300.

[0025] Specifically, the rope reel 200 is provided with a rotating mounting position 210 and a rope support fixing position 220.

[0026] The rope support 100 is rotatably mounted in the rotatable mounting position 210. Without the constraint of the rope support fixed position 220, the rope support 100 can rotate independently in the rotatable mounting position 210. By rotating the rope support 100, the rope can be tensioned.

[0027] The rope support 100 is provided with a fixing part 120, which is used to cooperate with the rope support fixing position 220 to fix the rope support 100 in the rotating mounting position 210, preventing the rope support 100 from rotating in the rotating mounting position 210, so that the rope support 100 is stationary relative to the rotating mounting position 210. At this time, the rope disc 200 can drive the rope support 100 to rotate synchronously, so that the pull rope 300 is tightened or loosened, thereby causing the snake bone to bend.

[0028] It should be noted that the rope reel 200 in this utility model refers to a component that can wind up or release the pull rope 300. It can be a gear mentioned in the background art, or a common rope reel 200 with a rope groove 250 for winding up the pull rope 300. The rope groove 250 on the rope reel 200 is connected to the rotating mounting position 210 for mounting the rope support 100, so that the pull rope 300 can enter the rope groove 250 after it comes out of the rope support 100.

[0029] After prolonged use, the pull rope 300 will inevitably deform, increasing its overall length. This causes a deviation in the mapping relationship between the rotation angle of the rope disc 200 and the bending angle of the snake bone. When the rope disc 200 rotates to the predetermined angle, the snake bone cannot reach the corresponding bending angle, resulting in a decrease in the accuracy of the snake bone bending adjustment.

[0030] In this embodiment, the slack rope 300 can be re-tensioned by rotating the rope support 100 to calibrate the mapping relationship between the rotation angle of the rope disc 200 and the bending angle of the snake bone; the method is as follows: (1) First, rotate the rope disc 200 used to adjust the bending direction of the snake bone to the initial position; when the rope disc 200 is in the initial position, the pull rope 300 should be taut and the snake bone should be straight, and the mapping relationship between the rotation angle of the rope disc 200 and the bending angle of the snake bone will be established.

[0031] (2) Confirm the slack pull rope 300 and the rope support 100 corresponding to the pull rope 300.

[0032] (3) Release the rope support fixing position 220 from fixing the rope support 100.

[0033] (4) Rotate the rope support 100; since one end of the pull rope 300 is fixed on the pull rope fixing position 110, when the rope support 100 rotates, the pull rope 300 will wrap around the rope support 100, which can make the slack pull rope 300 taut again. When the slack pull rope 300 is taut again and the snake bone is in a straight state, it means that the mapping relationship between the rotation angle of the rope disc 200 and the bending angle of the snake bone has been recalibrated.

[0034] (5) The rope support 100 is re-fixed through the rope support fixing position 220 to prevent the rope support 100 from rotating in the rotating mounting position 210, which would cause the pull rope 300 to loosen again.

[0035] It should be noted that in practice, the number of rope reels 200 used to control the bending of the snake bone is not fixed; it may be two or more. The number of rope supports 100 configured on the same rope reel 200 is also uncertain; it may be one or two. During calibration, all rope reels 200 should be rotated to their initial positions, and all pull ropes 300 connected to each rope support 100 should be adjusted to a taut state. Under these conditions, if the snake bone is straight, it indicates that the mapping relationship between the rotation angle of the rope reel 200 and the bending angle of the snake bone has been recalibrated.

[0036] Understandably, the above calibration method is not only applicable to tensioning the pull rope 300 after the pull rope retraction mechanism has been used for a period of time; it can also be used to tension the pull rope 300 during the initial assembly of the pull rope retraction mechanism. The only difference is that when re-tensioning, only the rope support 100 corresponding to the pull rope 300 that has loosened due to stretching deformation can be rotated to re-tension the pull rope 300 that has deformed due to stretching deformation; while during initial assembly, all rope supports 100 must be rotated to tension all pull ropes 300.

[0037] In summary, this embodiment provides a rotatable rope support 100 on the rope disc 200, and the tail end of the pull rope 300 is fixed by the rope support 100. When the rope disc 200 is in the initial position, rotating the rope support 100 can re-tension the slack pull rope 300 and restore the snake bone to a straight state, thereby calibrating the mapping relationship between the rotation angle of the rope disc 200 and the bending angle of the snake bone, and improving the accuracy of snake bone bending adjustment.

[0038] In one embodiment, the rope retraction mechanism includes two rope reels 200, each rope reel 200 is equipped with a separate drive rotation power source 400, which can be a motor; each rope reel 200 is equipped with two rope supports 100, two rotating mounting positions 210 and two rope support fixing positions 220, the two rope supports 100 on the same rope reel 200 are respectively installed in the corresponding rotating mounting positions 210, and the two rope support fixing positions 220 on the same rope reel 200 are used to fix the corresponding rope supports 100, and the four ropes 300 fixed by the four rope supports 100 on the two rope reels 200 are respectively located on the upper, lower, left and right sides of the probe.

[0039] In this embodiment, the method for calibrating the mapping relationship between the gear rotation angle and the snake-bend angle is as follows: (1) Rotate both rope discs 200° to their initial positions; (2) Confirm the slack pull rope 300 and the rope support 100 corresponding to the pull rope 300.

[0040] (3) Release the rope support fixing position 220 from fixing the rope support 100.

[0041] (4) Rotate the rope support 100 to re-tension the slack rope 300 and make the snake bone straight.

[0042] (5) The rope support 100 is re-fixed through the rope support fixing position 220 to prevent the rope support 100 from rotating and causing the rope 300 to loosen again.

[0043] In this embodiment, the principle for adjusting the bending angle of the snake bone is as follows: When the rope reel 200 rotates, it will wind up one of the pull ropes 300 and simultaneously release the other pull rope 300, causing the snake bone to bend towards the side where the pull rope 300 is wound up.

[0044] If only one of the rope coils 200 is rotated, only one rope 300 will be wound up and one rope 300 will be released, and the snake bone will bend toward the side of the wound rope 300; for example, if the upper rope 300 is wound up and the lower rope 300 is released, the snake bone will bend toward the side where the upper rope 300 is located.

[0045] If both rope coils 200 are rotated simultaneously, two pull ropes 300 will be wound up and released. The snake bone will bend towards the angle between the two wound pull ropes 300. For example, if the upper pull rope 300 and the right pull rope 300 are wound up to the same length, and the lower pull rope 300 and the left pull rope 300 are released, the snake bone will bend in the middle of the upper pull rope 300 and the right pull rope 300.

[0046] In one embodiment, the rotating mounting position 210 is a mounting cavity disposed on the rope reel 200. The mounting cavity can be cylindrical, and the rope support 100 is disposed in the mounting cavity so that the rope support 100 can rotate freely within the rotating mounting position 210 without constraint.

[0047] The aforementioned mounting cavity has an open front end, and a limiting part 230 is provided at one end of the open end to constrain the rope support 100 within the mounting cavity and prevent the rope support 100 from detaching from the mounting cavity on its own. Specifically, in this utility model, the front end refers to the end furthest from the rotational power source 400.

[0048] In one embodiment, the rope reel 200 described above is configured as a split structure.

[0049] The rope reel 200 includes a transmission plate 270 and a transmission frame 260. The transmission plate 270 and the transmission frame 260 are coaxially fixed. The side of the transmission plate 270 away from the transmission frame 260 is connected to the rotating power source 400.

[0050] Specifically, a shaped turntable 410 is fixedly connected to the output shaft of the rotary power source 400. The transmission plate 270 has a slot 280 that matches the shape of the turntable 410 on the side facing the rotary power source 400. A threaded cylinder 290 is fixedly installed on the side of the transmission frame 260 facing the transmission plate 270. The transmission plate 270 has a through hole that matches the threaded cylinder 290. After the screw passes through the turntable 410, it is threadedly connected to the threaded cylinder 290. In this way, both the transmission plate 270 and the transmission frame 260 are fixed on the turntable 410.

[0051] The mounting cavity includes a mounting groove 211 on the transmission plate 270 and a mounting hole 212 on the transmission frame 260. The mounting groove 211 and the mounting hole 212 are coaxially arranged, and the limiting part 230 is disposed on the side of the transmission frame 260 away from the transmission plate 270. During installation, the rope support 100 is first inserted into the mounting groove 211, and then the transmission frame 260 and the transmission plate 270 are fixed. The mounting hole 212 is aligned with the rope support 100, which restrains the rope support 100 within the rotating mounting position 210. At the same time, the rope support 100 can rotate freely within the rotating mounting position 210.

[0052] In one embodiment, a rope support plate 240 is fixedly disposed between the transmission plate 270 and the transmission frame 260. The side of the rope support plate 240 away from the center of the rope disc 200 is set as an arc-shaped surface 241. The transmission plate 270, the transmission frame 260 and the arc-shaped surface 241 of the middle rope support plate 240 form a rope groove 250 for constraining the winding or release path of the pull rope 300. The rope groove 250 is connected to the rotating mounting position 210. After the pull rope 300 comes out from the rope support 100, it can wrap around the arc-shaped surface 241 of the rope support plate 240.

[0053] Optionally, the rope support plate 240 is integrally formed with the transmission frame 260, and the threaded cylinder 290 is fixedly set on the side of the rope support plate 240 facing the transmission plate 270. The transmission plate 270 is provided with a through hole that matches the threaded cylinder 290, and the screw passes through the turntable 410 and is threadedly connected to the threaded cylinder 290.

[0054] Optionally, the rope support plate 240 can be an arc-shaped plate with a circumferential angle of 300 degrees (not shown in the attached figure). The two rope supports 100 are located within the remaining 60-degree angle. When the rope reel 200 is in the initial position, the two rope supports 100 are on the side of the rope reel 200 away from the probe. That is, after the two pull ropes 300 are led out from the two rope supports 100 on the rear side of the rope reel 200, one rope passes forward from above and around the rope support plate 240 to connect with the probe, and the other rope passes forward from below and around the rope support plate 240 to connect with the probe. Under normal circumstances, if the diameter of the rope support plate 240 is appropriate, the rope reel 200 can be rotated at most 90 degrees from the initial position to make the snake bone bend to its limit position in one direction.

[0055] Optionally, the two rope supports 100 are symmetrical about the central axis of the rope reel 200, such as... Figure 5 and Figure 6 As shown, when the rope disc 200 is in the initial position, the two rope supports 100 are located on the upper and lower sides of the rope disc 200 respectively, while the rope support plate 240 is set on the front and rear sides of the rope disc 200.

[0056] Optionally, the rope support plate 240 is an annular plate with a circumferential angle of 360 degrees (not shown in the attached figure). The two rope supports 100 are surrounded by the annular plate. The annular plate is provided with two holes for the pull rope 300 to pass through. After the pull rope 300 comes out of the rope support 100, it can pass through the holes and enter the rope groove 250.

[0057] In one embodiment, the rope reel 200 described above is configured as an integral structure (not shown in the accompanying drawings).

[0058] Specifically, the mounting cavity extends through the rope reel 200, and the limiting part 230 is positioned on the side of the mounting cavity away from the rotating power source 400. During installation, the rope support 100 is inserted into the mounting cavity from the end closest to the rotating power source 400, and then the end of the mounting cavity closest to the rotating power source 400 is closed, thus constraining the rope support 100 within the rotating mounting position 210, while allowing the rope support 100 to rotate freely within the rotating mounting position 210.

[0059] In one embodiment, the limiting part 230 is provided with a plurality of positioning grooves arranged in a ring, the plurality of positioning grooves constituting a rope support fixing position 220, and the fixing part 120 is configured as a locking block installed at the front end of the rope support 100; specifically, the positioning groove can be a circular hole, a semi-circular groove, an arc-shaped groove, or a triangular groove, and the locking block can be a cylindrical locking block or a triangular locking block adapted to the shape of the positioning groove, etc. Figure 5 and Figure 7 As shown in the figure, the positioning groove is an arc-shaped groove, and the locking block is cylindrical.

[0060] The rope support 100 can move axially within the rotating mounting position 210 to engage or disengage the locking block from the positioning groove. Specifically, as shown... Figure 7 As shown, when the rope support 100 moves forward along the axial direction, the locking block can engage with the positioning groove, and the rope support 100 cannot rotate within the rotating mounting position 210; when the rope support 100 moves backward along the axial direction, the locking block can disengage from the positioning groove, and the rope support 100 can rotate freely within the rotating mounting position 210.

[0061] In one implementation, such as Figure 5 and Figure 7 As shown, the limiting part 230 is configured as a limiting ring coaxially arranged with the mounting cavity, and multiple positioning grooves are evenly distributed on the inner diameter edge of the limiting ring.

[0062] Preferably, multiple positioning grooves are arranged continuously along the inner diameter edge of the limiting ring, that is, any two adjacent positioning grooves are closely connected. Under the condition that the size and shape of the positioning grooves and the inner diameter of the limiting ring remain unchanged, the number of positioning grooves can be increased, thereby improving the adjustment accuracy of the rope support 100.

[0063] Two locking blocks can be symmetrically arranged at the front end of the rope support 100. When the locking block engages with either of the positioning slots, the rope support 100 can be fixed in the rotating mounting position 210. When the locking block disengages from the positioning slot, the rope support 100 can rotate freely in the rotating mounting position 210.

[0064] Optionally, the limiting part 230 can be configured within the mounting cavity, such as... Figure 7 As shown; it can also be configured on the outer wall of the rope reel 200 outside the mounting hole 212 (not shown in the attached figure).

[0065] In one embodiment, the length of the mounting cavity is greater than the length of the rope support 100, and an elastic element 500 is provided in the mounting cavity. The elastic element 500 can drive the rope support 100 to move axially within the rotating mounting position 210 so that the locking block engages or disengages from the positioning groove.

[0066] Specifically, the elastic element 500 is located on the rear side of the mounting cavity. One end of the elastic element 500 abuts against or is fixedly connected to the rope support 100, and the other end abuts against the rear end of the mounting cavity. When the rope support 100 is pressed, the rope support 100 moves backward to compress the elastic element 500, and the fixing part 120 disengages from the rope support fixing position 220. When the rope support 100 is released, the elastic element 500 pushes the rope support 100 forward, so that the fixing part 120 engages with the rope support fixing position 220.

[0067] In one embodiment, the end of the rope support 100 is provided with a spring groove 130, and the elastic element 500 is disposed in the spring groove 130. The end refers to the end close to the rotational power source 400.

[0068] Specifically, such as Figure 7 As shown, the rope support 100 is provided with a spring groove 130 at one end in the mounting groove 211, and the elastic element 500 is disposed in the spring groove 130. By using the spring groove 130 to accommodate the elastic element 500, the overall length of the rotating mounting position 210 can be shortened, especially the depth of the mounting groove 211.

[0069] In one implementation, such as Figure 5 As shown, a rotation operation position 140 is provided at one end of the rope support 100. Specifically, the rotation operation position 140 is provided at the end of the rope support 100 away from the transmission plate 270. The rotation operation position 140 can be configured as a groove or protrusion that can engage with a flathead screwdriver or a crosshead screwdriver.

[0070] In one embodiment, the pull rope fixing position 110 is configured as a fixing hole that passes through the rope support 100. The fixing hole is used for the pull rope 300 to pass through, and a stop part is provided in the fixing hole. The stop part is used to engage and fix the clip (310) at the end of the pull rope (300).

[0071] Specifically, such as Figure 8 and Figure 9 As shown, the pull rope fixing position 110 is configured as a stepped hole that passes through the rope support 100. The first end of the pull rope 300 passes through the stepped hole and is connected to the probe part, while the tail end of the pull rope 300 is engaged in the stepped hole, so that the pull rope 300 can be wound up when the rope support 100 rotates. Among them, the clamp 310 is a metal sleeve fixedly installed at the tail end of the pull rope 300. After the metal sleeve is fitted onto the tail end of the pull rope 300, it is flattened by pliers to fix the metal sleeve to the tail end of the pull rope 300.

[0072] Optionally, the fixing hole is set as a frustum-shaped hole, with the width of the tail end of the fixing hole being greater than the width of the head end. The wider end is used to clamp and fix the sleeve 310 at the end of the pull rope 300.

[0073] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A rope retraction mechanism, characterized in that, include: The rope support (100) is provided with a rope fixing position (110) for fixing the pull rope (300). The rope reel (200) is provided with a rotating mounting position (210) and a rope support fixing position (220). in: The rope support (100) is rotatably mounted in the rotatable mounting position (210), so that the rope support (100) can rotate independently relative to the rope disc (200) to tension the pull rope (300). The rope support (100) is provided with a fixing part (120), which is used to cooperate with the rope support fixing position (220) to fix the rope support (100) in the rotating mounting position (210) so that the rope support (100) and the rope reel (200) are relatively stationary; The rope reel (200) is used to drive the rope holder (100) to rotate synchronously in order to wind up or release the rope (300).

2. The rope retraction mechanism according to claim 1, characterized in that: The rotating mounting position (210) is a mounting cavity configured on the rope reel (200), and the rope support (100) is configured in the mounting cavity; One end of the mounting cavity is open, and a limiting part (230) is provided at the open end to constrain the rope support (100) within the mounting cavity.

3. The rope retraction mechanism according to claim 2, characterized in that: The rope reel (200) includes a transmission plate (270) and a transmission frame (260), which are coaxially fixed. The side of the transmission plate (270) away from the transmission frame (260) is used to connect to a rotary power source (400). The mounting groove (211) on the transmission plate (270) and the mounting hole (212) on the transmission frame (260) together form a mounting cavity, and the mounting groove (211) and the mounting hole (212) are coaxially arranged; The limiting part (230) is located on the side of the mounting hole (212) away from the transmission plate (270).

4. The rope retraction mechanism according to claim 2 or 3, characterized in that: The limiting part (230) is provided with a plurality of positioning grooves arranged in a ring, the plurality of positioning grooves constitute the rope support fixing position (220), and the fixing part (120) is configured as a locking block disposed at the front end of the rope support (100); The rope support (100) can move axially within the rotating mounting position (210) to engage or disengage the locking block from the positioning groove.

5. The rope retraction mechanism according to claim 4, characterized in that: The limiting part (230) is configured as a limiting ring coaxially arranged with the mounting cavity, and multiple positioning grooves are evenly distributed on the inner diameter edge of the limiting ring.

6. The rope retraction mechanism according to claim 5, characterized in that: Multiple positioning grooves are arranged continuously along the inner diameter edge of the limiting ring.

7. The rope retraction mechanism according to claim 4, characterized in that: The length of the mounting cavity is greater than the length of the rope support (100), and an elastic element (500) is provided in the mounting cavity. The elastic element (500) can drive the rope support (100) to move axially within the rotating mounting position (210) so that the locking block engages or disengages from the positioning groove.

8. The rope retraction mechanism according to claim 7, characterized in that: The end of the rope support (100) is provided with a spring groove (130), and the elastic element (500) is disposed in the spring groove (130).

9. The rope retraction mechanism according to claim 3, characterized in that: A rope support plate (240) is fixedly arranged between the transmission plate (270) and the transmission frame (260), and the side of the rope support plate (240) away from the center of the rope disc (200) is set as an arc surface (241). The arc surfaces of the transmission plate (270), transmission frame (260) and rope support plate (240) form a rope groove (250) for constraining the pull rope (300), and the rope groove (250) is connected to the rotating mounting position (210).

10. The rope retraction mechanism according to claim 1, characterized in that: The rope fixing position (110) is set as a fixing hole that passes through the rope support (100). The fixing hole is used for the rope (300) to pass through, and a stop part is provided in the fixing hole. The stop part is used to lock the clip (310) at the end of the rope (300).

Images