A heat sink fin splicing assist
By designing a heat sink fin splicing aid that includes an infrared sensor and a servo motor, the problem that heat sink aids in the prior art cannot adapt to different substrate slots is solved, and the flexible adjustment and efficient installation of heat sink fin positions are realized.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN XINLIYUAN HARDWARE PLASTIC CO LTD
- Filing Date
- 2025-06-13
- Publication Date
- 2026-06-02
AI Technical Summary
Existing heat sink auxiliary devices cannot be flexibly adjusted according to the slots of different sized substrates, resulting in poor compatibility with substrates of other sizes.
A heat sink fin splicing aid, comprising a base assembly, a connecting assembly, and a placement assembly, was designed. Utilizing components such as an infrared sensor, a servo motor, and a laser rangefinder, it achieves automatic adjustment and fixation of the heat sink fin positions.
It enables flexible adjustment of the heat dissipation fin position to adapt to slots of different sized substrates, improving the applicability and installation efficiency of the heat sink.
Smart Images
Figure CN224309985U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of radiator manufacturing technology, specifically to a radiator fin splicing aid. Background Technology
[0002] A heat sink is a device that transfers heat from a heat source to the environment through conduction, convection, and radiation. A finned heat sink is a heat dissipation device that conducts heat to the fins by inserting heat dissipation fins into a substrate. Its basic principle is to insert heat dissipation fins one by one into grooves in the substrate, and then fix the fins and substrate together using different connection methods (such as welding, riveting, and bonding), achieving efficient heat conduction. Bonding uses thermally conductive epoxy resin, whose thermal conductivity is much lower than welding, but it is suitable for heat sinks with high fin density, high ratios, and small spacing. It can be used in scenarios where high heat dissipation performance is not required.
[0003] Based on the above, the inventors have discovered the following problem: In actual use, the current auxiliary device is not convenient to adjust the position of the heat dissipation fins according to the slots opened on different sized substrates. The position and size of the slots on different sized substrates vary, and the auxiliary device cannot adjust the position of the heat dissipation fins, so it can only be used on substrates of a specific size and cannot be well adapted to substrates of other sizes.
[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided a heat sink fin splicing aid to achieve a more practical purpose. Utility Model Content
[0005] The purpose of this invention is to provide a heat sink fin splicing aid to solve the problems mentioned in the background art.
[0006] In view of the above problems, the technical solution proposed by this utility model is as follows:
[0007] A radiator fin splicing aid includes a base assembly, a connecting assembly, and a placement assembly. The connecting assembly is disposed outside the base assembly, and the placement assembly is disposed outside the connecting assembly. The placement assembly includes a placement platform, on the top surface of which a plurality of movable seats are slidably mounted. Each of the movable seats has a circular groove on one side, and an infrared receiver is installed inside the circular groove. A top plate is mounted on the upper end of each of the movable seats, and an elastic clip is mounted on the upper end of the top plate. An electric slide rail is mounted on one side of the upper end of the placement platform, and an electric slider is slidably connected to the outside of the electric slide rail. A laser rangefinder sensor is mounted on the upper end of the electric slider, and an infrared emitter is mounted on the side of the electric slider near the movable seats. The infrared receiver can receive the infrared light emitted by the infrared emitter.
[0008] Furthermore, each of the movable seats has a circular hole inside, and a light rod is provided between the circular holes. The upper surface of the placement platform has a sliding groove, and the bottom ends of the movable seats are all located inside the sliding groove. The outer wall of the movable seats near the bottom end slides and engages with the inner wall of the sliding groove. Side blocks are installed at both ends of the upper end of the placement platform located in the sliding groove. The two ends of the light rod are respectively fixedly connected to one side of the side block. Each of the movable seats has a threaded hole inside on the side opposite to the infrared receiver. A locking bolt is threaded into the threaded hole, and one end of the locking bolt abuts against the outer wall of the light rod.
[0009] The beneficial effect of adopting the above-mentioned further solution is that, since a smooth rod is set between several circular holes, the outer wall of the smooth rod slides with the inner wall of the circular hole, and both ends of the smooth rod are fixedly connected to the side block, the movable seat can slide outside the smooth rod. At the same time, since the bottom end of the movable seat is located inside the slide groove, it is easy to realize the stable movement of the movable seat and prevent the movable seat from rotating outside the smooth rod. By setting a locking bolt, when one end of the locking bolt abuts against the outer wall of the smooth rod, the movable seat cannot move outside the smooth rod. When one end of the locking bolt no longer abuts against the outer wall of the smooth rod, the movable seat can move outside the smooth rod.
[0010] Furthermore, the longitudinal section of the elastic clip is Y-shaped, and the interior of the elastic clip has an elongated elliptical hollow hole.
[0011] The beneficial effect of adopting the above-mentioned further solution is that, since the longitudinal section of the elastic clip is Y-shaped, that is, there is a notch at the upper end of the elastic clip, when one end of the heat dissipation fin is placed at the notch and pressed down, the elastic clip moves to both sides, and the notch can be connected with the long elliptical hollow hole, so that one end of the heat dissipation fin is located in the long elliptical hollow hole. Since the elastic clip is elastic, the inner wall of the elastic clip at the connection between the notch and the long elliptical hollow hole presses against one end of the heat dissipation fin, thereby realizing the clamping of one end of the heat dissipation fin by the elastic clip.
[0012] Furthermore, the connecting assembly includes a pair of frames, each pair of frames having a ball screw inside. The two ends of the ball screw are respectively connected to the inner wall of the frame via bearings. The outer thread of the ball screw is connected to a slide block. The outer wall of the slide block is slidably engaged with the inner wall of the frame. A connecting strip is rotatably connected between the pair of slide blocks. One side of the connecting strip is fixedly connected to one side of the placement platform.
[0013] The beneficial effect of adopting the above-mentioned further solution is that by setting two ball screws, when the two ball screws rotate synchronously in the same direction, the slide connected by their external threads will move synchronously under the sliding cooperation with the frame, so that the connecting bar moves up or down, driving the placement platform to move up or down. After several elastic clips clamp one end of several heat dissipation fins respectively, the slide, connecting bar and placement platform move upward. Then, since the connecting bar can rotate between a pair of slides, the connecting bar rotates upward 180 degrees, causing the placement platform to flip over.
[0014] Furthermore, a second servo motor is mounted on the outer wall of one of the slides, and the output end of the second servo motor is connected to the connecting bar via a transmission connection.
[0015] The beneficial effect of adopting the above-mentioned further solution is that by setting a second servo motor, which has an encoder inside, the encoder can detect the rotation position of the servo motor in real time. When the second servo motor is working, it drives the placement platform to flip. When the placement platform flips 180 degrees from horizontal to horizontal and then returns to a horizontal state, the electric slide rail and other components are located at the bottom of the placement platform, so that the position of the elastic clip can be adjusted according to the slot of the substrate on the base, thereby adjusting the position of the heat dissipation fins.
[0016] Furthermore, a first servo motor is installed at the upper end of each pair of blocks, and the output ends of the pair of first servo motors are respectively connected to two ball screws for transmission. The pair of first servo motors have the same rotation speed and the same direction of rotation.
[0017] The beneficial effect of adopting the above-mentioned further solution is that by setting two first servo motors, the two first servo motors are of the same model and have the same speed and direction of rotation, which can synchronously drive the two ball screws to rotate, ensuring that the two slides move synchronously, making the placement platform move stably and avoiding jamming.
[0018] Furthermore, the base assembly includes a base, the outer sides of which are respectively fixedly connected to one side of a pair of frames. A horizontal plate is installed on the upper end of each pair of horizontal plates, and an electric telescopic rod is installed on the opposite side of each pair of horizontal plates. The movable end of the electric telescopic rod passes through the horizontal plate and is fitted with a clamping plate. A sliding rod is installed on one side of the clamping plate at both sides of the electric telescopic rod. The pair of sliding rods extends through the horizontal plate to the outside, and the outer wall of the pair of sliding rods slides in cooperation with the inner wall of the through hole of the horizontal plate.
[0019] The beneficial effect of adopting the above-mentioned further solution is that by setting up two electric telescopic rods of the same model and with the same extension and retraction speed at their moving ends, when the two electric telescopic rods are working, their moving ends drive the clamping plate to extend and retract, which can quickly clamp or release the slotted base plate placed on the base. By setting up a slide rod, the outer wall of the slide rod slides in cooperation with the inner wall of the through hole of the horizontal plate, and the slide rod guides and stabilizes the clamping plate, ensuring uniform clamping force.
[0020] Compared with the prior art, the beneficial effects of this utility model are as follows: This heat sink fin splicing aid places the slotted substrate on the base, and then activates two electric telescopic rods. The movable end of the electric telescopic rod drives the clamping plate to extend, which can quickly clamp the substrate placed on the base. Since the longitudinal section of the elastic clamping plate is Y-shaped, that is, there is a notch at the upper end of the elastic clamping plate, one end of the heat sink fin is placed at the notch and pressed downward, so that the elastic clamping plate moves to both sides. The notch can communicate with the long elliptical hollow hole, so that one end of the heat sink fin is located in the long elliptical hollow hole. Because the elastic clamping plate is elastic, the inner wall of the elastic clamping plate at the connection between the notch and the long elliptical hollow hole presses against one end of the heat sink fin, thereby realizing the clamping of one end of the heat sink fin by the elastic clamping plate. The second servo motor is activated to make it When the drive platform is rotated 180 degrees upwards and then returned to a horizontal position, the operation of the electric slide rail and electric slider causes the laser rangefinder to move. The laser rangefinder detects the position of the slot on the substrate. When the first slot is detected, the electric slide rail and electric slider stop working. Then, the operator loosens the locking bolt. When one end of the locking bolt is no longer in contact with the outer wall of the light rod, the leftmost movable seat can move outside the light rod until the infrared receiver on the leftmost movable seat receives the infrared light emitted by the infrared transmitter. At this time, the leftmost slot on the substrate aligns with the heat dissipation fins at the elastic clamp on the leftmost movable seat. Then, the locking bolt is tightened to fix the position of the movable seat. The operation steps are repeated so that several heat dissipation fins can be adjusted according to the slots on substrates of different sizes. Attached Figure Description
[0021] Figure 1 A three-dimensional structural diagram of a radiator fin splicing aid provided by this utility model;
[0022] Figure 2 An exploded three-dimensional structural diagram of the connection component of a radiator fin splicing aid provided by this utility model;
[0023] Figure 3 A three-dimensional structural diagram of the movable base and elastic clip of a radiator fin splicing aid provided by this utility model;
[0024] Figure 4A three-dimensional structural diagram of a placement platform for a radiator fin splicing aid provided by this utility model.
[0025] In the diagram: 1. Base assembly; 11. Base; 12. Clamping plate; 13. Electric telescopic rod; 14. Slide rod; 2. Connecting assembly; 21. Frame; 22. Ball screw; 23. Slide block; 24. Connecting bar; 25. First servo motor; 26. Second servo motor; 3. Placement assembly; 31. Placement platform; 32. Movable seat; 33. Locking bolt; 34. Infrared receiver; 35. Top plate; 36. Elastic clamp; 37. Electric slide rail; 38. Electric slider; 39. Laser rangefinder; 310. Side block; 311. Light rod; 312. Slide groove. Detailed Implementation
[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0027] Please see Figures 1-4 This utility model provides a technical solution: a radiator fin splicing aid, including a base assembly 1, a connecting assembly 2, and a placement assembly 3. The connecting assembly 2 is disposed outside the base assembly 1, and the placement assembly 3 is disposed outside the connecting assembly 2. The placement assembly 3 includes a placement platform 31, with a plurality of movable seats 32 slidably disposed on the top surface of the placement platform 31. Each of the movable seats 32 has a circular groove on one side, and an infrared receiver 34 is installed inside the circular groove. Each of the movable seats 32 has a top plate 35 installed at the top end, and an elastic clip 36 is installed at the top end of the top plate 35. An electric slide rail 37 is installed on one side of the upper end of the placement platform 31, and an electric slider 38 is slidably connected to the outside of the electric slide rail 37. A laser rangefinder sensor 39 is installed at the top end of the electric slider 38. The electric slider 38 is positioned near... An infrared emitter is mounted on one side of the movable seat 32, and an infrared receiver 34 can receive the infrared rays emitted by the infrared emitter. When the placement platform 31 is flipped 180 degrees upward and returns to a horizontal state, the operation of the electric slide rail 37 and the electric slider 38 causes the laser range sensor 39 to move. The laser range sensor 39 detects the position of the slot on the substrate. When the first slot is detected, the electric slide rail 37 and the electric slider 38 stop working. At this time, the position of the infrared emitter will not move. When the leftmost movable seat 32 moves outside the light rod 311 until the infrared receiver 34 on the leftmost movable seat 32 receives the infrared rays emitted by the infrared emitter, the leftmost slot on the substrate is aligned with the heat dissipation fins at the elastic clip 36 on the leftmost movable seat 32.
[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0029] Please see Figures 1-4 This utility model provides a technical solution: A plurality of movable seats 32 each have a circular hole inside, and a smooth rod 311 is provided between the circular holes. A sliding groove 312 is provided on the upper surface of the placement platform 31. The bottom ends of the plurality of movable seats 32 are all located inside the sliding groove 312. The outer wall of the plurality of movable seats 32 near their bottom ends slides in cooperation with the inner wall of the sliding groove 312. Side blocks 310 are installed at both ends of the upper end of the placement platform 31, located at both ends of the sliding groove 312. The two ends of the smooth rod 311 are respectively fixedly connected to one side of the side block 310. The movable base 32 has a threaded hole on the side opposite to the infrared receiver 34. A locking bolt 33 is threaded into the hole, with one end of the bolt abutting against the outer wall of the optical rod 311. The elastic clamp 36 has a Y-shaped longitudinal section and an elongated elliptical perforated hole inside. The optical rod 311 is positioned between several circular holes, with its outer wall slidingly engaging with the inner wall of the circular holes. Both ends of the optical rod 311 are fixedly connected to the side block 310, allowing the movable base 32 to... The smooth rod 311 slides externally. While sliding, the bottom end of the movable seat 32 is located inside the groove 312, facilitating stable movement of the movable seat 32 and preventing it from rotating outside the smooth rod 311. A locking bolt 33 is provided; when one end of the locking bolt 33 abuts against the outer wall of the smooth rod 311, the movable seat 32 cannot move outside the smooth rod 311. When one end of the locking bolt 33 no longer abuts against the outer wall of the smooth rod 311, the movable seat 32 can move within the smooth rod 311. External movement occurs because the longitudinal section of the elastic clip 36 is Y-shaped, meaning there is a notch at the upper end of the elastic clip. When one end of the heat dissipation fin is placed at the notch and pressed downwards, the elastic clip 36 moves to both sides. The notch can connect with the elongated elliptical hollow hole, so that one end of the heat dissipation fin is located inside the elongated elliptical hollow hole. Because the elastic clip 36 is elastic, the inner wall of the elastic clip 36 at the connection between the notch and the elongated elliptical hollow hole presses against one end of the heat dissipation fin, thereby achieving the clamping of one end of the heat dissipation fin by the elastic clip 36.
[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0031] Please see Figures 1-4 This utility model provides a technical solution: the connecting component 2 includes a pair of frames 21, each of which is equipped with a ball screw 22. The two ends of the ball screw 22 are respectively connected to the inner wall of the frame 21 via bearings. A slide block 23 is threaded onto the outside of the ball screw 22. The outer wall of the slide block 23 slides against the inner wall of the frame 21. A connecting strip 24 is rotatably connected between the pair of slide blocks 23. One side of the connecting strip 24 is fixedly connected to one side of the placement platform 31. A second servo motor 26 is mounted on the outer wall of one of the slide blocks 23. The output end of the second servo motor 26 is connected to... The connecting strips 24 are connected by a transmission mechanism. A first servo motor 25 is installed at the upper end of each pair of frames 21. The output ends of each pair of first servo motors 25 are respectively connected to two ball screws 22. The first servo motors 25 have the same rotational speed and direction. The base assembly 1 includes a base 11. The outer sides of the base 11 are fixedly connected to one side of each pair of frames 21. A horizontal plate is installed at the upper end of each base. An electric telescopic rod 13 is installed on the opposite side of each pair of horizontal plates. The movable end of the electric telescopic rod 13 passes through the horizontal plate and is fitted with a clamping plate 12. On one side, slide rods 14 are installed on both sides of the electric telescopic rod 13. A pair of slide rods 14 extend through the horizontal plate to the outside. The outer wall of the pair of slide rods 14 slides in cooperation with the inner wall of the through hole of the horizontal plate. By setting two first servo motors 25, the two first servo motors 25 are of the same model and have the same speed and direction of rotation, which can synchronously drive the two ball screws 22 to rotate. The slide block 23 connected to its external thread will move synchronously under the sliding cooperation with the frame 21, so that the placement platform 31 can move stably. The system moves linearly to avoid jamming. After several elastic clips 36 clamp one end of several heat dissipation fins respectively, the slide 23, connecting bar 24 and placement platform 31 move upward. Then, since the connecting bar 24 can rotate between a pair of slides 23, the connecting bar 24 rotates upward 180 degrees, causing the placement platform 31 to flip over. After the positions of several heat dissipation fins are adjusted, glue is applied to the groove of the substrate. Then, the slide 23, connecting bar 24 and placement platform 31 move downward, so that the end of the heat dissipation fin away from the elastic clip 36 is inserted into the groove, completing the splicing of the substrate and heat dissipation fins.
[0032] Specifically, the working principle of this heat sink fin splicing aid is as follows: In use, the pre-grooved substrate is placed on the base 11. Then, two electric telescopic rods 13 are activated. The movable ends of the electric telescopic rods 13 extend the clamping plate 12, quickly clamping the substrate placed on the base 11. Since the longitudinal section of the elastic clamping plate 36 is Y-shaped (i.e., there is a notch at the upper end of the elastic clamping plate), one end of the heat sink fin is placed at the notch and pressed downwards, causing the elastic clamping plate 36 to move to both sides. The notch connects with the elongated elliptical perforated hole, allowing one end of the heat sink fin to be located within the elongated elliptical perforated hole. Due to the elasticity of the elastic clamping plate 36, the elastic clamping plate 36... The inner wall of the circular hollow hole connection presses against one end of the heat dissipation fin, thereby achieving the clamping of one end of the heat dissipation fin by the elastic clamp 36. By setting two first servo motors 25, the two first servo motors 25 are of the same model, and the two first servo motors 25 have the same speed and direction of rotation, which can synchronously drive the two ball screws 22 to rotate. The slide block 23 connected by its external thread will move synchronously under the sliding cooperation with the square frame 21, so that the placement platform 31 can move linearly and stably without jamming. After several elastic clamps 36 clamp one end of several heat dissipation fins respectively, the slide block 23, the connecting bar 24 and the placement platform 31 can move synchronously and stably. The platform 31 moves upward, and then the second servo motor 26 is activated, driving the platform 31 to rotate 180 degrees upward and return to a horizontal position. The operation of the electric slide rail 37 and the electric slider 38 causes the laser range sensor 39 to move. The laser range sensor 39 detects the position of the slot on the substrate. When the first slot is detected, the electric slide rail 37 and the electric slider 38 stop working. Then, the operator loosens the locking bolt 33. When one end of the locking bolt 33 is no longer in contact with the outer wall of the light rod 311, the leftmost movable seat 32 can move outside the light rod 311 until the infrared receiver 34 on the leftmost movable seat 32 is reached. Upon receiving infrared radiation emitted by the infrared transmitter, the leftmost slot on the substrate aligns with the heat dissipation fins at the elastic clip 36 on the leftmost movable seat 32. The locking bolt 33 is then tightened to fix the position of the movable seat 32. This process is repeated to adjust several heat dissipation fins according to the slots on substrates of different sizes. After the positions of several heat dissipation fins are adjusted, adhesive is applied to the slots on the substrate. Then, through the combined use of two first servo motors 25 and ball screws 22, the slide 23, connecting bar 24, and placement table 31 move downwards, allowing the end of the heat dissipation fins away from the elastic clip 36 to be inserted into the slot, thus completing the splicing of the substrate and the heat dissipation fins.
[0033] It should be noted that all standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. Furthermore, since this application is mainly used to protect mechanical devices, the control methods and circuit connections will not be explained in detail in this application.
Claims
1. A radiator fin splicing aid, characterized in that, The system includes a base assembly (1), a connecting assembly (2), and a placement assembly (3). The connecting assembly (2) is disposed outside the base assembly (1), and the placement assembly (3) is disposed outside the connecting assembly (2). The placement assembly (3) includes a placement platform (31). A plurality of movable seats (32) are slidably disposed on the top surface of the placement platform (31). A circular groove is opened inside one side of each of the movable seats (32), and an infrared receiver (34) is installed inside the circular groove. The upper ends of the movable seats (32) are all... A top plate (35) is installed, and an elastic clip (36) is installed on the upper end of the top plate (35). An electric slide rail (37) is installed on one side of the upper end of the placement platform (31). An electric slider (38) is slidably connected to the outside of the electric slide rail (37). A laser rangefinder (39) is installed on the upper end of the electric slider (38). An infrared emitter is installed on the side of the electric slider (38) near the moving seat (32). The infrared receiver (34) can receive the infrared rays emitted by the infrared emitter.
2. The radiator fin splicing aid according to claim 1, characterized in that, Each of the movable seats (32) has a circular hole inside, and a light rod (311) is provided between the circular holes. The upper surface of the placement platform (31) has a sliding groove (312). The bottom ends of the movable seats (32) are located inside the sliding groove (312). The outer wall of the movable seats (32) near the bottom end slides and engages with the inner wall of the sliding groove (312). The upper end of the placement platform (31) is equipped with side blocks (310) at both ends of the sliding groove (312). The two ends of the light rod (311) are fixedly connected to one side of the side block (310). Each of the movable seats (32) has a threaded hole inside the side opposite to the infrared receiver (34). The threaded hole is threaded with a locking bolt (33). One end of the locking bolt (33) abuts against the outer wall of the light rod (311).
3. The radiator fin splicing aid according to claim 1, characterized in that, The longitudinal section of the elastic clip (36) is Y-shaped, and the interior of the elastic clip (36) has an elongated elliptical hollow hole.
4. The radiator fin splicing aid according to claim 1, characterized in that, The connecting assembly (2) includes a pair of frames (21), and each pair of frames (21) is provided with a ball screw (22). The two ends of the ball screw (22) are respectively connected to the inner wall of the frame (21) through bearings. The outer thread of the ball screw (22) is connected to a slide (23). The outer wall of the slide (23) is slidably engaged with the inner wall of the frame (21). A connecting strip (24) is rotatably connected between the pair of slides (23). One side of the connecting strip (24) is fixedly connected to one side of the placement platform (31).
5. A radiator fin splicing aid according to claim 4, characterized in that, One of the slides (23) has a second servo motor (26) mounted on its outer wall, and the output end of the second servo motor (26) is connected to the connecting bar (24) via a transmission.
6. A radiator fin splicing aid according to claim 5, characterized in that, Each of the two boxes (21) is equipped with a first servo motor (25) at its upper end, and the output ends of the pair of first servo motors (25) are respectively connected to two ball screws (22) for transmission.
7. A radiator fin splicing aid according to claim 1, characterized in that, The base assembly (1) includes a base (11), the outer sides of which are fixedly connected to one side of a pair of frames (21). A horizontal plate is installed on the upper end of the base. An electric telescopic rod (13) is installed on the opposite side of the pair of horizontal plates. The movable end of the electric telescopic rod (13) passes through the horizontal plate and is fitted with a clamping plate (12). A sliding rod (14) is installed on one side of the clamping plate (12) at both sides of the electric telescopic rod (13). The pair of sliding rods (14) extends through the horizontal plate to the outside. The outer wall of the pair of sliding rods (14) slides in cooperation with the inner wall of the through hole of the horizontal plate.