A gear module parameter detection device in a folding screen shaft

Abstract

The utility model discloses a parameter detection device for a gear module in a folding screen shaft, comprising a working platform, a bracket being installed on the working platform, a clamping mechanism being installed on the bracket, and the clamping mechanism clamps and fixes the shaft assembly; a virtual position auxiliary mechanism is also installed on the bracket, and the virtual position auxiliary mechanism is located on both sides of the rotation direction of the shaft assembly; the utility model also comprises a camera assembly, and the camera assembly is supported and installed on the working platform by a support frame, and the downward lens of the camera assembly is located directly above the shaft assembly; during detection, the shaft assembly is clamped and fixed on the clamping mechanism, and the expanded or closed state of the shaft assembly is switched and adjusted with the assistance of force applied by the virtual position auxiliary mechanism, and the camera assembly captures the shape of the shaft assembly and the angle in the expanded or closed state, so as to realize parameter detection of the shaft assembly, help realize the automation of detection, effectively ensure the consistency, accuracy and timeliness of detection, and have good practicality.

Description

Technical Field

[0001] The utility model relates to the technical field of folding screen rotating shaft detection equipment, in particular to a gear module parameter detection device in a folding screen rotating shaft. Background Art

[0002] Based on the folding accuracy requirements of foldable screen mobile phones, the folding screen hinge assembly needs to be inspected after machine or manual assembly to promptly detect quality defects caused by processing or assembly.

[0003] In the prior art, the actual parameters of the folding screen hinge assembly after assembly are usually manually tested using 2D or 3D measuring instruments. Not only is the measurement process quite cumbersome, but it is also unable to automatically identify the measurement and requires manual identification and data comparison, which results in manual judgment errors and low work efficiency. In addition, the accuracy and timeliness of the measurement data cannot be guaranteed. Utility Model Content

[0004] In order to solve the above problems, the present application provides a device for detecting the parameters of the gear module in the folding screen shaft with a reasonable structure, so as to realize the parameter detection of the shaft assembly, help to realize the automation of detection, effectively ensure the consistency, accuracy and timeliness of detection, and have good practicality.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A device for detecting parameters of a gear module in a folding screen shaft comprises a working platform, a bracket is mounted on the working platform, a clamping mechanism is mounted on the bracket, and the clamping mechanism clamps and fixes the shaft assembly; a virtual position auxiliary mechanism is also mounted on the bracket, and the virtual position auxiliary mechanism is located on both sides of the rotation direction of the shaft assembly; and also comprises a camera assembly, which is supported and mounted on the working platform by a support frame, and the downward lens of the camera assembly is located directly above the shaft assembly.

[0007] As a further improvement of the above technical solution:

[0008] The structure of the bracket is as follows: it includes an upper plate and a lower plate arranged at intervals from top to bottom, and the upper plate and the lower plate are supported by columns; the lower plate is supported and fixed on the working platform, the clamping mechanism is installed on the bottom surface of the upper plate, and the clamping block on the top of the clamping mechanism passes through the upper plate upward.

[0009] The structure of the clamping mechanism is as follows: it includes a clamping driving power with an output end facing upward, the clamping driving power is installed on the bottom surface of the upper plate, and clamping blocks are respectively installed on the two clamping claws at the top output end of the clamping driving power. The clamping driving power drives the two clamping blocks to move toward or away from each other; the two clamping blocks move toward each other to clamp the rotating shaft assembly.

[0010] The upper plate is provided with a long groove for accommodating and moving the clamping block; the top surface of the clamping block is not higher than the top surface of the upper plate.

[0011] The facing sides of the two clamping blocks are provided with clamping grooves which are conformed to the clamped part of the rotating shaft assembly.

[0012] The virtual position auxiliary mechanism includes a transverse driving power installed horizontally on the top surface of the bracket, and a sliding block is installed at the output end of the transverse driving power, and the sliding block is arranged toward the rotating shaft assembly.

[0013] A pressure plate is installed on the top surface of the bracket, and a driving seat is installed on the top surface of the pressure plate. A lateral driving power is supported and installed via the driving seat; a through groove is opened on the pressure plate for the sliding block to slide through.

[0014] In one set of virtual position auxiliary mechanisms, the end of the sliding block is set as a convex arm 2 with an outward convex V-shaped structure, and the inclined surfaces on both sides of the convex arm 2 apply force to the shaft assembly, so that the shaft assembly switches from a closed state to an extended state; in another set of virtual position auxiliary mechanisms, the end of the sliding block forms a symmetrical convex arm 1 through an inward concave V-shaped structure, and the end face of the convex arm 1 applies force to the shaft assembly, so that the shaft assembly switches from an extended state to a closed state; the convex arm 1 and the convex arm 2 are arranged on both sides of the shaft assembly.

[0015] The camera assembly includes a camera, a lens is installed at the bottom of the camera, and light sources are arranged at intervals below the lens; a support plate is installed on the side of the camera, the support plate is installed on the support frame, and an annular hoop is provided around the circumferential outside of the lens, and a connecting block is installed between the annular hoop and the support plate; the light source is installed on the support frame below the camera.

[0016] The structure of the support frame is as follows: it includes upper and lower supports arranged at intervals, a screw rod is installed between the two supports for common rotation, a light rod is installed between the two supports located on both sides of the screw rod, and the top of the screw rod passes through the support upward and is connected to a rotation driving power; a lifting seat is spirally mounted on the screw rod, the lifting seat is slidably fitted with the light rods on both sides, a second support rod arranged at intervals is vertically installed on the side of the lifting seat, and a camera assembly is installed on the ends of the two support rods; a sliding seat is installed on the light rods on both sides located below the lifting seat, a first support rod arranged at intervals is vertically installed laterally on the sliding seat, and a light source is installed on the end of the first support rod.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The utility model is easy to operate. During detection, the shaft assembly is clamped and fixed on the clamping mechanism, and the virtual position auxiliary mechanism applies force to assist in switching and adjusting the unfolded or closed state of the shaft assembly. The camera assembly captures the shape of the shaft assembly and the angle of the unfolded or closed state, thereby realizing parameter detection of the shaft assembly, helping to realize the automation of detection, effectively ensuring the consistency, accuracy and timeliness of detection, and having good practicality.

[0019] The utility model also has the following advantages:

[0020] The clamping mechanism clamps the shaft assembly of the folding screen through the clamping groove, and the virtual position auxiliary mechanism constrains and centers the shaft assembly. The lens focal length is automatically adjusted by rotating the screw on the support frame to be compatible with the automated detection of different types of shaft assemblies.

[0021] Since the detection repeatability accuracy of the shaft assembly in a free state is poor, a virtual position auxiliary mechanism is used to constrain the shaft assembly. By constraining the shaft assembly in one direction through the virtual position auxiliary mechanism, the repeatability of the shaft assembly detection can be effectively improved.

[0022] When the rotating shaft assembly switches to a closed state, the protruding arm 1 is pushed by the lateral driving power to move toward the rotating shaft assembly, and the protruding arm 1 applies force to the end surfaces of both ends of the rotating shaft assembly on the rotating part 1 and the rotating part 2, so that the rotating part 1 and the rotating part 2 are subjected to the force and rotate relative to the rotating shaft part, thereby switching to a closed state; similarly, when the rotating shaft assembly switches to an expanded state, the protruding arm 2 is pushed by the lateral driving power to move, and the protruding arm 2 moves toward the rotating shaft assembly, contacts, and applies force, thereby acting on the rotating part 1 and the rotating part 2 to make them rotate relative to the rotating shaft part, thereby switching to an expanded state. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the utility model.

[0024] Figure 2 It is a schematic diagram of the layout of the clamping mechanism and the virtual position auxiliary mechanism on the bracket of the utility model.

[0025] Figure 3 The exploded view is of the clamping mechanism and the virtual position auxiliary mechanism installed on the bracket of the utility model.

[0026] Figure 4 It is a structural schematic diagram of the clamping mechanism of the utility model.

[0027] Figure 5 It is a schematic diagram of the clamping mechanism of the utility model clamping the rotating shaft assembly.

[0028] Figure 6 It is a structural schematic diagram of the support frame of the utility model.

[0029] Figure 7 It is a structural schematic diagram of the rotating shaft assembly of the utility model.

[0030] Among them: 1. working platform; 2. virtual position auxiliary mechanism; 3. bracket; 4. clamping mechanism; 5. light source; 6. camera assembly; 7. support frame; 10. shaft assembly;

[0031] 11. Rotating shaft; 12. Rotating part 1; 13. Rotating part 2;

[0032] 21. lateral driving force; 22. sliding block; 23. pressing plate; 24. driving seat; 221. protruding arm 1; 222. protruding arm 2; 231. through slot;

[0033] 31. Upper plate; 32. Lower plate; 33. Column;

[0034] 41. Clamping driving power; 42. Clamping claw; 43. Clamping block; 44. Clamping groove;

[0035] 61. camera; 62. lens; 611. support plate 1; 612. connecting block; 621. annular hoop;

[0036] 71. Support; 72. Rotational driving force; 73. Light rod; 74. Screw rod; 75. Lifting seat; 76. Back plate; 77. Sliding seat; 78. Support rod one; 79. Support rod two. DETAILED DESCRIPTION

[0037] The specific implementation of the present utility model is described below in conjunction with the accompanying drawings.

[0038] like Figure 1 As shown, a device for detecting parameters of a gear module in a folding screen shaft of the present embodiment includes a working platform 1, a bracket 3 is installed on the working platform 1, a clamping mechanism 4 is installed on the bracket 3, and the clamping mechanism 4 clamps and fixes the shaft assembly 10; a virtual position auxiliary mechanism 2 is also installed on the bracket 3, and the virtual position auxiliary mechanism 2 is located on both sides of the rotation direction of the shaft assembly 10; it also includes a camera assembly 6, and the camera assembly 6 is supported and installed on the working platform 1 by a support frame 7, and the downward lens 62 of the camera assembly 6 is located directly above the shaft assembly 10.

[0039] During detection, the hinge assembly 10 is clamped and fixed on the clamping mechanism 4, and the virtual position auxiliary mechanism 2 applies force to assist in switching and adjusting the extended or closed state of the hinge assembly 10. The camera assembly 6 captures the shape of the hinge assembly 10 and the angle in the extended or closed state to achieve parameter detection of the hinge assembly 10.

[0040] like Figure 2 As shown, the structure of the bracket 3 is: it includes an upper plate 31 and a lower plate 32 arranged at an interval, and the upper plate 31 and the lower plate 32 are supported by a column 33; the lower plate 32 is supported and fixed on the working platform 1, and the clamping mechanism 4 is installed on the bottom surface of the upper plate 31, and the clamping block 43 on the top of the clamping mechanism 4 passes through the upper plate 31 upward.

[0041] In this embodiment, the reliability of the installation of the clamping mechanism 4 and the virtual position auxiliary mechanism 2 on the working platform 1 is effectively guaranteed by the bracket 3, and the clamping stability of the rotating shaft assembly 10 is effectively guaranteed.

[0042] like Figure 4 As shown, the structure of the clamping mechanism 4 is: it includes a clamping driving power 41 with an output end facing upward, the clamping driving power 41 is installed on the bottom surface of the upper plate 31, and two clamping claws 42 at the top output end of the clamping driving power 41 are respectively installed with clamping blocks 43, and the clamping driving power 41 drives the two clamping blocks 43 to move toward or away from each other; the two clamping blocks 43 move toward each other to clamp the rotating shaft assembly 10.

[0043] In this embodiment, the clamping driving power 41 can be an existing standard clamping finger cylinder, which can achieve clamping by moving the two clamping claws 42 toward or away from each other at the same time.

[0044] A long groove is provided on the upper plate 31 for the clamping block 43 to accommodate and move therein. While clamping the rotating shaft assembly 10 via the clamping block 43, it also provides guidance for the clamping action of the clamping block 43, thereby effectively ensuring the clamping stability. The top surface of the clamping block 43 is not higher than the top surface of the upper plate 31, thereby reducing or even avoiding the movement of the virtual position auxiliary mechanism 2 toward the rotating shaft assembly 10.

[0045] The two clamping blocks 43 are provided with clamping grooves 44 that are conformed to the clamped portion of the shaft assembly 10 , thereby effectively ensuring the clamping stability and reducing the clamping error.

[0046] like Figure 3 As shown, the virtual position auxiliary mechanism 2 includes a lateral driving power 21 horizontally installed on the top surface of the bracket 3, and a sliding block 22 is installed at the output end of the lateral driving power 21, and the sliding block 22 is arranged toward the rotating shaft assembly 10; the sliding block 22 applies contact force to the rotating shaft assembly 10 to constrain the state of the rotating shaft assembly 10.

[0047] A pressing plate 23 is installed on the top surface of the bracket 3 , and a driving seat 24 is installed on the top surface of the pressing plate 23 . The lateral driving force 21 is supported and installed via the driving seat 24 . A through slot 231 is opened on the pressing plate 23 for the sliding block 22 to slide through.

[0048] In this embodiment, the lateral driving power 21 is fixedly installed relative to the bracket 3 via the pressure plate 23 and the driving seat 24. At the same time, the through groove 231 on the pressure plate 23 provides guidance for the movement of the sliding block 22, effectively ensuring the reliability of the movement of the sliding block 22.

[0049] like Figure 5As shown, in one group of virtual position auxiliary mechanisms 2, the end of the sliding block 22 is set to a convex arm 2 222 with an outward convex V-shaped structure, and the inclined surfaces on both sides of the convex arm 222 apply force to the shaft assembly 10, so that the shaft assembly 10 switches from a closed state to an extended state; in another group of virtual position auxiliary mechanisms 2, the end of the sliding block 22 is formed into a symmetrical convex arm 1 221 through an inward concave V-shaped structure, and the end surface of the convex arm 1 221 applies force to the shaft assembly 10, so that the shaft assembly 10 switches from an extended state to a closed state; the convex arm 1 221 and the convex arm 2 222 are arranged on both sides of the shaft assembly 10.

[0050] Since the detection repeatability accuracy of the shaft assembly 10 in a free state is poor, a virtual position auxiliary mechanism 2 is used to constrain the shaft assembly 10. The virtual position auxiliary mechanism 2 constrains the shaft assembly 10 in one direction to effectively improve the repeatability of the detection of the shaft assembly 10.

[0051] When the rotating shaft assembly 10 needs to be switched to a closed state, the protruding arm 1 221 is pushed by the lateral driving power 21 to move toward the rotating shaft assembly 10, and the protruding arm 1 221 applies force to the end surfaces of both ends of the rotating shaft assembly 10 on the rotating part 12 and the rotating part 2 13, so that the rotating part 12 and the rotating part 2 13 are subjected to force and rotate relative to the rotating shaft part 11, thereby switching to the closed state; similarly, when the rotating shaft assembly 10 is switched to an expanded state, the protruding arm 222 is pushed by the lateral driving power 21 to move, and the protruding arm 222 moves toward the rotating shaft assembly 10, contacts, and applies force, thereby acting on the rotating part 12 and the rotating part 2 13 to make them rotate relative to the rotating shaft part 11, thereby switching to the expanded state.

[0052] The camera assembly 6 includes a camera 61, a lens 62 is installed at the bottom of the camera 61, and a light source 5 is arranged at intervals below the lens 62; a support plate 611 is installed on the side of the camera 61, the support plate 611 is installed on the support frame 7, and an annular hoop 621 is provided around the circumferential outside of the lens 62, and a connecting block 612 is installed between the annular hoop 621 and the support plate 611; the light source 5 is installed on the support frame 7 below the camera 61.

[0053] Through the installation connection of the annular clamp 621, the connecting block 612 and the support plate 611, the relatively large lens 62 below the camera 61 is limited, effectively ensuring the relative position stability of the camera 61 and the lens 62 during use, and ensuring the imaging effect.

[0054] like Figure 6As shown, the structure of the support frame 7 is as follows: it includes upper and lower supports 71 arranged at intervals, a screw rod 74 is rotatably installed between the two supports 71, a light rod 73 is installed between the two supports 71 on both sides of the screw rod 74, and the top of the screw rod 74 passes through the support 71 upward and is connected to a rotating driving power 72; a lifting seat 75 is spirally mounted on the screw rod 74, and the lifting seat 75 is slidably fitted with the light rods 73 on both sides, and a second support rod 79 arranged at intervals is vertically installed on the side of the lifting seat 75, and the ends of the second support rod 79 are jointly installed with the camera assembly 6; a sliding seat 77 is installed on the light rods 73 on both sides located below the lifting seat 75, and a support rod 1 78 arranged at intervals is vertically installed on the side of the sliding seat 77, and a light source 5 is jointly installed on the ends of the support rod 1 78.

[0055] In this embodiment, the camera assembly 6 and the lower light source 5 are both mounted on the support frame 7 to form an integral structure, which is convenient for adjustment and maintenance and has good integrity.

[0056] The height of the light source 5 is adjusted by moving the sliding seat 77 up and down relative to the optical rod 73 and locking it relative to the sliding seat 73 after the movement; the position of the light source 5 relative to the lower bracket 3 is adjusted by moving the support rod 78 relative to the sliding seat 77 in the insertion direction.

[0057] Through the operation of the rotating driving power 72, the screw rod 74 rotates, and the camera 61 is driven to move up and down through the lifting seat 75 to realize automatic adjustment of the focal length; through the movement of the support rod 2 79 relative to the lifting seat 75 in the insertion direction, and the setting of the horizontal long hole perpendicular to the support rod 2 79, the position of the camera assembly 6 in the horizontal plane is adjusted.

[0058] In this embodiment, a back plate 76 can be locked between the lifting seat 75 and the sliding seat 77 . The back plate 76 is locked with the sliding seat 77 via the vertical long hole, thereby effectively ensuring the structural stability between the lifting seat 75 and the sliding seat 77 .

[0059] In this embodiment, the clamping mechanism 4 clamps the hinge assembly 10 of the folding screen via the clamping groove 44, and the virtual position auxiliary mechanism 2 constrains and centers the hinge assembly 10. The focal length of the lens 62 is automatically adjusted by rotating the screw 74 on the support frame 7 to be compatible with the automated detection of different types of hinge assemblies 10.

[0060] like Figure 7 As shown, the hinge assembly 10 of the folding screen generally includes a hinge portion 11 located in the middle and arranged along the rotation axis, and a rotating portion 12 and a rotating portion 2 13 are rotatably mounted on both sides of the hinge portion 11 via a gear module.

[0061] During detection, the clamping mechanism 4 clamps the rotating shaft portion 11 located below the rotating portion 12 and the rotating portion 2 13, and the virtual position auxiliary mechanism 2 applies force to the rotating portion 12 and the rotating portion 2 13 of the rotating shaft assembly 10 above the clamping position to help achieve the state switching of the rotating shaft assembly 10 between opening and closing.

[0062] The corresponding detection parameters of the shaft assembly 10 are obtained by taking an image from the upper camera assembly 6, including but not limited to Figure 7 The dimensions of A, B, and C, as well as the angles between A, B, and C are shown in the figure.

[0063] During the inspection, the dimensions of A, B, and C in different states, as well as the angles between A, B, and C can be obtained by switching the rotating shaft assembly 10 between the expanded and closed states.

[0064] The utility model realizes parameter detection of the rotating shaft component, helps to realize the automation of detection, effectively ensures the consistency, accuracy and timeliness of detection, and has good practicality.

[0065] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0066] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the protection scope of the utility model.

Claims

1. A device for detecting parameters of a gear module in a folding screen shaft, comprising a working platform (1), characterized in that: The working platform (1) is provided with a bracket (3), and a clamping mechanism (4) is provided on the bracket (3), and the clamping mechanism (4) clamps and fixes the rotating shaft assembly (10); the bracket (3) is also provided with a virtual position auxiliary mechanism (2), and the virtual position auxiliary mechanism (2) is located on both sides of the rotating direction of the rotating shaft assembly (10); and the camera assembly (6) is also provided, and the camera assembly (6) is supported and installed on the working platform (1) by a support frame (7), and a downwardly facing lens (62) of the camera assembly (6) is located directly above the rotating shaft assembly (10).

2. A gear module parameter detection device in a folding screen shaft as claimed in claim 1, characterized in that: The structure of the bracket (3) is as follows: it comprises an upper plate (31) and a lower plate (32) arranged at an interval, the upper plate (31) and the lower plate (32) being supported via a column (33); the lower plate (32) is supported and fixed on the working platform (1), the clamping mechanism (4) is installed on the bottom surface of the upper plate (31), and the clamping block (43) at the top of the clamping mechanism (4) passes through the upper plate (31) upwards.

3. A gear module parameter detection device in a folding screen shaft as claimed in claim 2, characterized in that: The structure of the clamping mechanism (4) is as follows: it includes a clamping driving power (41) with an output end facing upward, the clamping driving power (41) is installed on the bottom surface of the upper plate (31), and clamping blocks (43) are respectively installed on two clamping claws (42) at the top output end of the clamping driving power (41), and the clamping driving power (41) drives the two clamping blocks (43) to move towards or away from each other; the two clamping blocks (43) move towards each other to clamp the rotating shaft assembly (10).

4. A gear module parameter detection device in a folding screen shaft as described in claim 2 or 3, characterized in that: The upper plate (31) is provided with a long groove for accommodating and moving the clamping block (43); the top surface of the clamping block (43) is not higher than the top surface of the upper plate (31).

5. A gear module parameter detection device in a folding screen shaft as described in claim 2 or 3, characterized in that: The two clamping blocks (43) are provided with clamping grooves (44) which are conformally matched to the clamped portion of the rotating shaft assembly (10).

6. A device for detecting parameters of a gear module in a folding screen shaft as claimed in claim 1, characterized in that: The virtual position auxiliary mechanism (2) comprises a transverse driving power (21) horizontally mounted on the top surface of the bracket (3), a sliding block (22) is mounted on the output end of the transverse driving power (21), and the sliding block (22) is arranged toward the rotating shaft assembly (10).

7. A device for detecting parameters of a gear module in a folding screen shaft as claimed in claim 6, characterized in that: A pressure plate (23) is installed on the top surface of the bracket (3), and a driving seat (24) is installed on the top surface of the pressure plate (23). The lateral driving power (21) is supported and installed via the driving seat (24); a through groove (231) is opened on the pressure plate (23) for the sliding block (22) to slide through.

8. A device for detecting parameters of a gear module in a folding screen shaft as claimed in claim 6, characterized in that: The end of the sliding block (22) in one set of virtual position auxiliary mechanisms (2) is configured as a convex arm 2 (222) of an outwardly convex V-shaped structure, and the inclined surfaces on both sides of the convex arm 2 (222) exert force on the rotating shaft assembly (10), so that the rotating shaft assembly (10) switches from a closed state to an extended state; the end of the sliding block (22) in another set of virtual position auxiliary mechanisms (2) forms a symmetrical convex arm 1 (221) through an inwardly concave V-shaped structure, and the end surface of the convex arm 1 (221) exerts force on the rotating shaft assembly (10), so that the rotating shaft assembly (10) switches from an extended state to a closed state; the convex arm 1 (221) and the convex arm 2 (222) are arranged on both sides of the rotating shaft assembly (10).

9. A gear module parameter detection device in a folding screen shaft as claimed in claim 1, characterized in that: The camera assembly (6) comprises a camera (61), a lens (62) is mounted at the bottom of the camera (61), and light sources (5) are arranged at intervals below the lens (62); a support plate (611) is mounted on the side of the camera (61), the support plate (611) is mounted on a support frame (7), an annular hoop (621) is sleeved around the circumferential outer portion of the lens (62), and a connecting block (612) is mounted between the annular hoop (621) and the support plate (611); the light source (5) is mounted on the support frame (7) below the camera (61).

10. A gear module parameter detection device in a folding screen shaft as claimed in claim 1, characterized in that: The support frame (7) has the following structure: it comprises a support (71) arranged at intervals from top to bottom, a screw rod (74) is rotatably mounted between the two supports (71), a light rod (73) is mounted between the two supports (71) on both sides of the screw rod (74), and the top of the screw rod (74) passes through the support (71) upwards and is connected to a rotation driving power (72); a lifting seat (75) is spirally mounted on the screw rod (74), the lifting seat (75) is slidably mounted with the light rods (73) on both sides, a second support rod (79) arranged at intervals is vertically mounted on the side of the lifting seat (75), and a camera assembly (6) is commonly mounted at the end of the second support rod (79); a sliding seat (77) is mounted on the light rods (73) on both sides below the lifting seat (75), a first support rod (78) arranged at intervals is vertically mounted on the side of the sliding seat (77), and a light source (5) is commonly mounted at the end of the first support rod (78).

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