Positioning and supporting cable guider

Abstract

The utility model relates to the field of guiders, and discloses a positioning and supporting cable guider. The positioning and supporting cable guider comprises a hook, a length adjusting mechanism, a rotating mechanism and a guiding mechanism, the hook is in sliding connection with an external hanging ring, the length adjusting mechanism is arranged at the bottom of the hook, a second n-shaped frame of the rotating mechanism is connected with the bottom of the length adjusting mechanism, and a rotating seat is hinged to the second n-shaped frame. The guide mechanism is fixedly arranged at the bottom of the rotating seat, the guide mechanism is provided with a supporting guide wheel, and the supporting guide wheel is transversely arranged in the rotating mechanism, so that when the cable is dragged, the supporting guide wheel shifts from a vertical supporting state to a horizontal supporting state at the bending position of the cable, and turning, moving and supporting of the cable are completed; the guider is not only used for a linear cable, but also can be used at a corner of the cable, so that the application range of the guider is enlarged, the cable is prevented from being twisted and damaged, and the damage risk of the cable is reduced.

Description

Technical Field

[0001] This utility model relates to the field of guides, specifically to a positioning support cable guide. Background Technology

[0002] Cables are a general term for items such as optical cables and electrical cables. They have many uses, primarily for control installation, equipment connection, and power transmission, making them a common and indispensable part of daily life. During cable installation, support guides are needed for guidance and support. Current cable guides involve evenly installing multiple guides, allowing the cable to pass through the guide wheels on each device sequentially. However, for cable support and movement, each guide wheel is placed vertically. During installation, cable bends are inevitable. Because the guide wheels are vertical, the device can only guide and support cables in straight lines, failing to guide and support cables at bends. Without support and guidance at bends, friction and twisting can easily occur, damaging the outer insulation material and increasing the risk of cable breakage. Utility Model Content

[0003] To overcome the above problems, this utility model provides a positioning support cable guide. The guide is provided with a hook, a length adjustment mechanism, a rotating mechanism, and a guiding mechanism. The hook is slidably connected to an external hanging ring. The length adjustment mechanism is located at the bottom of the hook. The rotating mechanism is connected to the bottom of the length adjustment mechanism. The rotating mechanism includes a second U-shaped frame and a rotating seat. The horizontal plate of the second U-shaped frame is fixedly connected to the bottom of the length adjustment mechanism. The rotating seat is hinged and rotates between the two vertical plates of the second U-shaped frame. The guiding mechanism is fixedly located at the bottom of the rotating seat. The guiding mechanism is provided with a supporting guide wheel, which is horizontally arranged inside the rotating mechanism. This device can be used not only on straight cables but also at cable bends, expanding its applicability. When applied to cable bends, during dragging, the hook shifts at the hanging ring, and the rotating mechanism rotates at a certain angle, causing the guide mechanism to shift. This causes the support guide wheel to shift from a vertical support state to a horizontal support state at the cable bend, completing the cable bending and supporting movement, preventing cable twisting and damage, and reducing the risk of cable damage. Furthermore, when the hanging rings are at different heights, the length adjustment mechanism adjusts the height of the guide mechanism, ensuring that the support guide wheel and the support guide wheels of other supports are at the same height, keeping the supported cable horizontal and resulting in a more aesthetically pleasing and neater cable routing.

[0004] To achieve the above objectives, this utility model provides a positioning support cable guide, the guide comprising:

[0005] The hook is slidably connected to an external hanging ring;

[0006] A length adjustment mechanism is located at the bottom of the hook;

[0007] A rotating mechanism, comprising a second truncated frame and a rotating seat, wherein the horizontal plate of the second truncated frame is fixedly connected to the bottom of the length adjustment mechanism, and the rotating seat is hinged and rotated between the two vertical plates of the second truncated frame;

[0008] A guiding mechanism is fixedly installed at the bottom of the rotating seat. The guiding mechanism is equipped with a supporting guide wheel, which is horizontally arranged inside the rotating mechanism. This allows the supporting guide wheel to shift from a vertical support state to a horizontal support state at the bend of the cable when the cable is dragged, thus completing the bending movement support of the cable.

[0009] Preferably, the length adjustment mechanism includes:

[0010] First truss-shaped frame;

[0011] A mouth-shaped frame, the top of which is fixedly connected to two vertical plates of the first gusset frame;

[0012] An adjusting screw is rotatably disposed between the two side plates of the orifice frame, with one end of the adjusting screw penetrating through the top plate of the orifice frame and the other end of the adjusting screw connected to the bottom plate of the orifice frame;

[0013] A threaded seat is slidably connected to the adjusting screw;

[0014] Two connecting vertical plates are slidably disposed on the bottom plate of the orifice frame, with the upper ends of the two connecting vertical plates respectively connected to the two sides of the bottom of the threaded seat, and the lower ends of the two connecting vertical plates respectively connected to the two sides of the top of the rotating mechanism.

[0015] Preferably, the length adjustment mechanism further includes a knob, which is located at the top of one end of the adjusting screw.

[0016] Preferably, a plurality of adjustment holes are provided on one vertical plate of the second U-shaped frame in an arc shape and evenly arranged;

[0017] The rotating seat has a cavity, and a spring button fixing assembly is installed in the cavity. The spring button fixing assembly passes through one side of the rotating seat and is matched and connected to the adjustment hole to fix the rotating seat.

[0018] Preferably, the spring button fixing assembly includes:

[0019] A spring, the spring being disposed within the cavity;

[0020] A sliding plate is fitted into the cavity, and one side of the sliding plate is connected to one end of a spring;

[0021] A button is connected to the other side of the slide plate, and the button passes through one side of the rotating base and is matched and connected to the adjustment hole.

[0022] Preferably, the guiding mechanism includes:

[0023] The upper ends of the two vertical plates of the third truss are connected to the bottom of the rotating mechanism;

[0024] A support guide wheel is provided, which is laterally rotatable between the lower ends of the two vertical plates of the third U-shaped frame;

[0025] A sliding roller assembly is laterally disposed on two vertical plates of the third U-shaped frame near the supporting guide wheel.

[0026] Preferably, the sliding roller assembly includes:

[0027] Two sliding grooves are respectively disposed on the two vertical plates of the third U-shaped frame near the supporting guide wheel;

[0028] A slider, wherein the slider is slidably disposed within one of the grooves;

[0029] A roller is horizontally disposed between the two vertical plates of the third U-shaped frame, and one end of the roller is connected to the slider;

[0030] A fixing screw, one end of which passes through another of the sliding grooves and is connected to the other end of the roller;

[0031] The nut is connected to the other end of the fixing screw and is used to cooperate with the fixing screw to press the other vertical plate of the third U-shaped frame, thereby fixing the position of the roller.

[0032] Through the above technical solution, the guide is equipped with a hook, a length adjustment mechanism, a rotating mechanism, and a guiding mechanism. The hook is slidably connected to an external hanging ring. The length adjustment mechanism is located at the bottom of the hook. The rotating mechanism includes a second U-shaped frame and a rotating seat. The horizontal plate of the second U-shaped frame is fixedly connected to the bottom of the length adjustment mechanism. The rotating seat is hinged and rotates between the two vertical plates of the second U-shaped frame. The guiding mechanism is fixedly located at the bottom of the rotating seat and is equipped with a supporting guide wheel, which is horizontally arranged inside the rotating mechanism. This device can be used not only for straight cables but also at cable bends, increasing its applicability. When applied to cable bends, the hook shifts at the hanging ring, and the rotating seat of the rotating mechanism rotates at a certain angle. A spring button fixing component is provided for convenience and speed. The rotating seat is quickly fixed, causing the guide mechanism to shift. A sliding roller assembly and a support guide wheel are installed, causing the support guide wheel and roller to shift from a vertical support state to a horizontal support state at cable bends during cable dragging. The roller is used to limit cable movement, and the gap between the roller and the support guide wheel is adjusted by a sliding block to accommodate cables of various widths. The cable completes its bending movement on the support guide wheel, preventing cable twisting and damage, and reducing the risk of cable damage. Simultaneously, when the hanging ring height varies, the length adjustment mechanism uses a threaded rod in conjunction with a threaded seat to adjust the height. The threaded seat moves up and down, adjusting the height of the rotating and guide mechanisms, ensuring that the support guide wheel and the support guide wheels of other supports are at the same height, keeping the supported cable horizontal and resulting in a more aesthetically pleasing and neater cable routing. Attached Figure Description

[0033] Figure 1 This is a structural schematic diagram of a positioning support cable guide according to one embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of the working state structure of a positioning support cable guide according to one embodiment of the present invention;

[0035] Figure 3 This is a schematic diagram of the rotating seat of a positioning support cable guide according to one embodiment of the present invention;

[0036] Figure 4 This is a cross-sectional schematic diagram of the rotating mechanism of a positioning support cable guide according to one embodiment of the present utility model;

[0037] Figure 5 This is a structural schematic diagram of the length adjustment mechanism of a positioning support cable guide according to one embodiment of the present utility model;

[0038] Figure 6This is an exploded structural diagram of the support guide wheel and sliding roller assembly of a positioning support cable guide according to one embodiment of the present invention.

[0039] Explanation of reference numerals in the attached figures

[0040] 1. Length adjustment mechanism 2. Rotation mechanism

[0041] 3. Guiding mechanism 4. Hook

[0042] 11. First U-shaped frame 12. Mouth-shaped frame

[0043] 13. Adjusting screw 14. Threaded seat

[0044] 15. Connecting vertical plate 16. Knob

[0045] 21. Second U-shaped frame 22. Rotating seat

[0046] 31. Third U-shaped frame; 32. Support guide wheel

[0047] 33. Sliding roller assembly 211. Adjustment hole

[0048] 221. Cavity; 222. Spring button fixing assembly

[0049] 331. Slide rail; 332. Slider

[0050] 333, Roller; 334, Fixing Screw

[0051] 335, Nut 2221, Spring

[0052] 2222, skateboard; 2223, button Detailed Implementation

[0053] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0054] In this embodiment of the utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used to describe the relative positional relationships of the components in relation to the directions shown in the accompanying drawings or in relation to the vertical, perpendicular, or gravitational directions.

[0055] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0056] Figure 1 This is a structural schematic diagram of a positioning support cable guide according to one embodiment of the present invention, as shown below. Figure 2 The diagram shown is a schematic representation of the working state structure of a positioning support cable guide according to one embodiment of the present invention. Figure 1 and Figure 2 In this device, the guide includes a hook 4, a length adjustment mechanism 1, a rotating mechanism 2, and a guiding mechanism 3. Specifically, the hook 4 is slidably connected to an external hanging ring, the length adjustment mechanism 1 is located at the bottom of the hook 3, the rotating mechanism 2 includes a second truncated frame 21 and a rotating seat 22, the horizontal plate of the second truncated frame 21 is fixedly connected to the bottom of the length adjustment mechanism 1, the rotating seat 22 is hinged and rotated between the two vertical plates of the second truncated frame 21, the guiding mechanism 3 is fixedly located at the bottom of the rotating seat 22, and the guiding mechanism 3 is provided with a supporting guide wheel 32, which is horizontally arranged inside the rotating mechanism 2. This device can be used not only on straight cables but also at cable bends, increasing its applicability. When used at cable bends to support and move cables, it guides the cables horizontally. During the dragging process, the hook 4 shifts at the hanging ring, the rotating mechanism 2 rotates at a certain angle, and the guiding mechanism 3 shifts, causing the support guide wheel 32 to shift from a vertical support state to a horizontal support state at the cable bend, thus completing the support for the cable's movement at bends, preventing cable twisting and damage, and reducing the risk of cable damage.

[0057] Through the above technical solution, the guide adjusts the angle of the guiding mechanism according to the working state of cable dragging, so that during the dragging process, the hook deflects at the hanging ring, the rotating seat of the rotating mechanism rotates at a certain angle, and the guiding mechanism shifts, so that when the cable is dragged, the supporting guide wheel shifts from a vertical support state to a horizontal support state at the cable bend, completing the bending movement support of the cable, avoiding cable twisting and damage, reducing the risk of cable damage, and can also be used for straight cables, increasing the applicability of the device.

[0058] like Figure 5 The diagram shown is a structural schematic of a length adjustment mechanism for a positioning support cable guide according to one embodiment of the present invention; Figure 5 In this invention, considering that the height of the external hanging rings varies due to environmental factors, the height of the support guide wheel 32 may also deviate, thus affecting the support and movement of the cable. To facilitate the adjustment of the height of the support guide wheel 32 and make it the same as the height of other support guide wheels 32, in one embodiment of this invention, the length adjustment mechanism 1 includes a first U-shaped frame 11, an orifice frame 12, an adjusting screw 13, a threaded seat 14, and two connecting vertical plates 15. The top of the orifice frame 12 is fixedly connected to the two vertical plates of the first U-shaped frame 11. The adjusting screw 13 is rotatably disposed between the two side plates of the orifice frame 12, and one end of the adjusting screw 13 passes through the top plate of the orifice frame 12. The other end of the adjusting screw 13 is connected to the bottom plate of the orifice frame 12. The threaded seat 14 is slidably connected to the adjusting screw 13. Two connecting vertical plates 15 are slidably disposed through the bottom plate of the orifice frame 12. The upper ends of the two connecting vertical plates 15 are respectively connected to the two sides of the bottom of the threaded seat 14, and the lower ends of the two connecting vertical plates 15 are respectively connected to the two sides of the top of the rotating mechanism 2. The adjusting screw 13 is matched and connected to the threaded seat 14. Adjusting the threaded seat 14 drives it to move up and down. The threaded seat 14 moves up and down with the rotating mechanism 2. The rotating mechanism 2 is connected to the guide mechanism 3 to complete the height adjustment of the support guide wheel 32 and meet the subsequent uniform height support guide.

[0059] exist Figure 5 In order to facilitate the control of the adjusting screw 13, in one embodiment of the present invention, the length adjustment mechanism 1 further includes a knob 16. The knob 16 is disposed on the top of one end of the adjusting screw. The knob 16 facilitates the rotation control of the adjusting screw 13 and improves work efficiency.

[0060] like Figure 3 The diagram shown is a structural schematic of a rotating seat for a positioning support cable guide according to one embodiment of the present invention; as shown... Figure 4 The diagram shown is a cross-sectional schematic of the rotating mechanism of a positioning support cable guide according to one embodiment of the present invention; Figure 1 , 3 In addition to 4, in order to facilitate the rotation control of the guide mechanism 3, in one embodiment of this utility model, the rotation mechanism 2 includes a second slanted frame 21 and a rotating seat 22. The horizontal plate of the second slanted frame 21 is fixedly connected to the bottom of the length adjustment mechanism 1. The rotating seat 22 is hinged and rotated between the two vertical plates of the second slanted frame 21. The second slanted frame 21 wraps around the rotating seat 22, protects the rotating seat 22, and also facilitates the subsequent fixing of the rotating seat 22.

[0061] exist Figure 4In order to satisfy the need to fix the rotating seat 22 at different angles, in one embodiment of this utility model, a plurality of adjustment holes 211 arranged in an arc shape are provided on a vertical plate of the second U-shaped frame 21. A cavity 221 is provided inside the rotating seat 22, and a spring button fixing assembly 222 is provided inside the cavity 221. The spring button fixing assembly 222 passes through one side of the rotating seat 22 and is matched and connected to the adjustment hole 211 to fix the rotating seat 22. When the spring button fixing assembly 222 is squeezed and the rotating seat 22 is rotated, the spring button fixing assembly 222 moves from one adjustment hole 211 to an adjacent adjustment hole 211 to complete the fixing of the rotating seat at different angles.

[0062] exist Figure 4 In order to achieve the adjustment and control of the spring button fixing assembly 222, in one embodiment of this utility model, the spring button fixing assembly 222 includes a spring 2221, a sliding plate 2222, and a button 2223. The spring 2221 is disposed in the cavity 221, the sliding plate 2222 is matched and disposed in the cavity 221, and one side of the sliding plate 2222 is connected to one end of the spring 2221. The button 2223 is connected to the other side of the sliding plate 2222, and the button 2223 passes through one side of the rotating seat 22 and is matched and connected to the adjustment hole 211. After the button 2223 is pressed down in one adjustment hole 211, the rotating seat 22 is rotated to a certain angle. When the button 2223 moves from one adjustment hole 211 to an adjacent adjustment hole 211, the button 2223 will be subjected to elastic force and press against the vertical plate between one adjustment hole 211 and the adjacent adjustment hole 211 of the second U-shaped frame 21. When it reaches the adjacent adjustment hole 211, the button 2223 will pop out, thereby fixing the rotating seat.

[0063] like Figure 6 The diagram shown is an exploded view of the support guide wheel and sliding roller assembly of a positioning support cable guide according to one embodiment of the present invention. Figure 6 In order to guide and limit the cable during guidance, and to prevent the cable from deviating from the support guide wheel 2, in one embodiment of this utility model, the guiding mechanism includes a third U-shaped frame 31, a support guide wheel 32, and a sliding roller assembly 33. The upper ends of the two vertical plates of the third U-shaped frame 31 are connected to the bottom of the rotating mechanism 2. The support guide wheel 32 is laterally rotatably disposed between the lower ends of the two vertical plates of the third U-shaped frame 31. The sliding roller assembly 33 is laterally disposed on the two vertical plates of the third U-shaped frame 31 near the support guide wheel 32. The cable moves with support on the support guide wheel 32, and the sliding roller assembly 33 is disposed above the cable to limit the cable and prevent it from deviating from the support guide wheel 32, ensuring normal operation.

[0064] To meet the needs of cables of different widths, the sliding roller assembly 33 includes: two grooves 331, a slider 332, a roller 333, a fixing screw 334, and a nut 335. The two grooves 331 are correspondingly arranged on the two vertical plates of the third U-shaped frame 31 near the supporting guide wheel 32. The slider 332 is slidably arranged in one groove 331. The roller 333 is arranged laterally between the two vertical plates of the third U-shaped frame 31, and one end of the roller 333 is connected to the slider. One end of the fixing screw 334 passes through the other groove 331 and is connected to the other end of the roller 333. The nut 335 is connected to the other end of the fixing screw 334 and is used to cooperate with the fixing screw 334 to press the other vertical plate of the third U-shaped frame 31 to complete the position fixation of the roller 333. One end of the roller 333 is connected to the slider 332, which slides in a groove 331 to complete the position movement. The other end of the roller 333 is provided with a fixing screw 334. The fixing screw 334 passes through another groove 331 and cooperates with the nut 334 to press the other vertical plate of the third U-shaped frame 31, thereby fixing the position of the roller 333, thus meeting the needs of cables of various widths and applicable to multiple scenarios.

[0065] Through the above technical solution, the guide is equipped with a hook, a length adjustment mechanism, a rotating mechanism, and a guiding mechanism. The hook is slidably connected to an external hanging ring. The length adjustment mechanism is located at the bottom of the hook. The rotating mechanism includes a second U-shaped frame and a rotating seat. The horizontal plate of the second U-shaped frame is fixedly connected to the bottom of the length adjustment mechanism. The rotating seat is hinged and rotates between the two vertical plates of the second U-shaped frame. The guiding mechanism is equipped with a supporting guide wheel, which is horizontally arranged inside the rotating mechanism. This device can be used not only for straight cables but also at cable bends, increasing its applicability. When applied to cable bends, the hook shifts at the hanging ring, and the rotating seat of the rotating mechanism rotates at a certain angle. A spring button fixing component is provided for convenient and quick fixing of the rotating seat. In case of cable misalignment, a sliding roller assembly and a support guide wheel are installed. This allows the support guide wheel and roller to shift from a vertical support state to a horizontal support state at the cable bend when the cable is being dragged. The roller is used to limit the cable movement, and the gap between the roller and the support guide wheel is adjusted by a sliding block to accommodate cables of various widths. The cable completes its bending movement on the support guide wheel, preventing cable twisting and damage and reducing the risk of cable damage. Simultaneously, when the hanging ring heights are inconsistent, the length adjustment mechanism uses a threaded rod in conjunction with a threaded seat to adjust the height. The threaded seat moves up and down, adjusting the height of the rotating mechanism and the guide mechanism, ensuring that the support guide wheel and the support guide wheels of other supports are at the same height. This keeps the supported cable horizontal, resulting in a more aesthetically pleasing and neater cable routing.

[0066] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention. It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present invention will not further describe the various possible combinations.

[0067] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. A positioning support cable guide, characterized in that, The guide includes: The hook is slidably connected to an external hanging ring; A length adjustment mechanism is located at the bottom of the hook; A rotating mechanism, comprising a second truncated frame and a rotating seat, wherein the horizontal plate of the second truncated frame is fixedly connected to the bottom of the length adjustment mechanism, and the rotating seat is hinged and rotated between the two vertical plates of the second truncated frame; A guiding mechanism is fixedly installed at the bottom of the rotating seat. The guiding mechanism is equipped with a supporting guide wheel, which is horizontally arranged inside the rotating mechanism. This allows the supporting guide wheel to shift from a vertical support state to a horizontal support state at the bend of the cable when the cable is dragged, thus completing the bending movement support of the cable.

2. The positioning support cable guide according to claim 1, characterized in that, The length adjustment mechanism includes: First truss-shaped frame; A mouth-shaped frame, the top of which is fixedly connected to two vertical plates of the first gusset frame; An adjusting screw is rotatably disposed between the two side plates of the orifice frame, with one end of the adjusting screw penetrating through the top plate of the orifice frame and the other end of the adjusting screw connected to the bottom plate of the orifice frame; A threaded seat is slidably connected to the adjusting screw; Two connecting vertical plates are slidably disposed on the bottom plate of the orifice frame, with the upper ends of the two connecting vertical plates respectively connected to the two sides of the bottom of the threaded seat, and the lower ends of the two connecting vertical plates respectively connected to the two sides of the top of the rotating mechanism.

3. The positioning support cable guide according to claim 2, characterized in that, The length adjustment mechanism also includes a knob, which is located at the top of one end of the adjusting screw.

4. The positioning support cable guide according to claim 1, characterized in that, The second U-shaped frame has multiple adjustment holes arranged in an arc shape on one of its vertical plates; The rotating seat has a cavity, and a spring button fixing assembly is installed in the cavity. The spring button fixing assembly passes through one side of the rotating seat and is matched and connected to the adjustment hole to fix the rotating seat.

5. The positioning support cable guide according to claim 4, characterized in that, The spring button fixing assembly includes: A spring, the spring being disposed within the cavity; A sliding plate is fitted into the cavity, and one side of the sliding plate is connected to one end of a spring; A button is connected to the other side of the slide plate, and the button passes through one side of the rotating base and is matched and connected to the adjustment hole.

6. The positioning support cable guide according to claim 2, characterized in that, The guiding mechanism includes: The upper ends of the two vertical plates of the third truss are connected to the bottom of the rotating mechanism; A support guide wheel is provided, which is laterally rotatable between the lower ends of the two vertical plates of the third U-shaped frame; A sliding roller assembly is laterally disposed on two vertical plates of the third U-shaped frame near the supporting guide wheel.

7. The positioning support cable guide according to claim 6, characterized in that, The sliding roller assembly includes: Two sliding grooves are respectively disposed on the two vertical plates of the third U-shaped frame near the supporting guide wheel; A slider, wherein the slider is slidably disposed within one of the grooves; A roller is horizontally disposed between the two vertical plates of the third U-shaped frame, and one end of the roller is connected to the slider; A fixing screw, one end of which passes through another of the sliding grooves and is connected to the other end of the roller; The nut is connected to the other end of the fixing screw and is used to cooperate with the fixing screw to press the other vertical plate of the third U-shaped frame, thereby fixing the position of the roller.

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