A single-person multi-position audio and video acquisition auxiliary device

Abstract

The present application relates to audio and video acquisition technical field, specifically to a kind of single person multi-position audio and video acquisition auxiliary device, including the Z-shaped rod, the two ends of the Z-shaped rod are respectively fixed with connecting rod one and connecting rod two, the top of the Z-shaped rod is provided with two symmetrical distribution support panels, the Z-shaped rod is fixedly connected with corresponding position support panel, the inner top of the support panel is rotatably connected with screw rod, the two ends between two support panels are all provided with linkage block for making two screw rods rotate simultaneously, the outer side of two screw rods is respectively screw-connected with transmission seat one and transmission seat two.In the present application, gear is rolled on rack by motor two, so that two fixed seats with movable plate are moved on base plate to the direction of approaching thumb, at the same time, motor can rotate mobile phone on movable plate to the direction of thumb, so as to reduce the distance between mobile phone side screen and thumb, and mobile phone is actively moved to hand direction, so as to facilitate user to operate mobile phone screen with one hand.

Description

Technical Field

[0001] This invention relates to the field of audio and video acquisition technology, specifically to a single-person, multi-camera audio and video acquisition auxiliary device. Background Technology

[0002] With the rapid development of the internet, outdoor live streaming is becoming increasingly popular. Outdoor live streaming typically requires the use of a live streaming stick. This involves fixing a live streaming phone to one end of the stick, and then attaching a bracket to the stick near the handhold. The stick passes through the bracket, and the viewing phone and the accompaniment phone are fixed to opposite ends of the bracket to assist the live streaming phone in broadcasting. During the live stream, the streamer holds the stick in one hand and a microphone or other live streaming equipment in the other. When the streamer needs to touch the viewing or accompaniment phone, they usually have to put down the live streaming equipment and touch the phone with their finger, which can interrupt the sound of the live stream. Alternatively, holding the live streaming equipment while simultaneously tapping the screen can easily lead to accidental touches on other parts of the screen, causing considerable inconvenience to the live stream. Therefore, there is a need to design an audio and video capture auxiliary device that can automatically move multiple mobile phones (touchscreens) to the streamer's hand for convenient touch control. Summary of the Invention

[0003] To overcome the aforementioned technical problems, the present invention aims to provide a single-person, multi-camera audio and video acquisition auxiliary device. A motor drives a gear to roll on a rack, causing two fixed seats with movable plates to move towards the thumb on a base plate. Simultaneously, the motor rotates the mobile phone on the movable plate towards the thumb, reducing the distance between the phone's side screen and the thumb. This active movement of the phone towards the hand facilitates single-handed operation of the screen. A lead screw moves transmission seats one and two, causing the two base plates to move away from their initial positions on a support panel. This allows the two base plates and the phone to switch positions, enabling the phone near the back of the hand to move closer to the palm. This allows phones in different positions to be moved closer to the thumb, facilitating thumb operation of the touchscreen and enabling single-person, single-handed control of multiple cameras. By holding the connecting rod one with the left hand, and fixing a mobile phone or other touch screen inside the rectangular airbag frame of the movable plate, the second motor drives the gear to rotate, causing the gear to roll on the rack. This moves the movable plate towards the hand under the action of the two positioning seats (at this time, the movable plate moving is the one closer to the left thumb; refer to the instruction manual). Figure 1 At this point, the left thumb can touch the area on the phone near the thumb (refer to the instruction manual). Figure 9 The motor inside the positioning base rotates the movable plate towards the left thumb (refer to the instruction manual). Figure 10The phone rotates under the action of the movable plate, which makes the side of the phone screen away from the thumb move closer to the thumb, making it easier for the thumb to touch the side of the phone screen away from the thumb. By actively moving the phone closer to the thumb, the left hand can hold the connecting rod while touching the phone screen, eliminating the need to put down the live broadcast equipment and use the other hand to touch the phone screen. Hold the connecting rod two with your right hand (refer to the instruction manual). Figure 2 Similarly, the movable plate near the right thumb end can also be translated and rotated in the direction of the right thumb, so that the mobile phone screen can still be operated with one hand when the right hand holds the connecting rod two. This is suitable for broadcasters who like to hold the handheld rod (connecting rod two) with their right hand and hold the microphone and other live broadcast equipment with their left hand. This allows the mobile phone screen to be operated with one hand regardless of which hand is used to hold the auxiliary device, and also expands the scope of application of this application.

[0004] The objective of this invention can be achieved through the following technical solutions: A single-person, multi-camera audio and video acquisition auxiliary device includes a C-shaped rod. Connecting rod one and connecting rod two are fixed to both ends of the C-shaped rod, respectively. Two symmetrically distributed support panels are provided on the top of the C-shaped rod. The C-shaped rod is fixedly connected to the corresponding support panels. A lead screw is rotatably connected to the inner top of each support panel. A linkage block for simultaneously rotating the two lead screws is provided between the two ends of each support panel. Transmission seat one and transmission seat two are screwed onto the outer sides of each of the two lead screws, respectively. A base plate is provided on the outer side of both transmission seat one and transmission seat two. A rack is fixed to one side of each base plate. Two symmetrically distributed positioning seats are detachably and slidably engaged on the top surface of each base plate. A motor two is fixed to the outer side of each positioning seat. A gear that meshes with and rolls with the rack is fixed to the output end of the motor two. A movable plate is rotatably connected between the two positioning seats. A mobile phone body is detachably fixed to the top surface of the movable plate. Limit transmission components are provided between each of the two support panels and the corresponding base plate.

[0005] Furthermore, the limiting transmission component includes a transmission tube fixedly connected to the bottom surface of the substrate, a transmission shaft fixed to the outside of the transmission tube, a slide rod slidably inserted inside the transmission tube, a connecting block fixed to the bottom surface of the slide rod, and a locking post fixed to one end of the connecting block that slidably engages with the bottom surface of the support panel.

[0006] Furthermore, a transmission frame is fixed to the bottom surface of the second transmission seat, wherein a connecting post that is slidably connected to the transmission frame is fixed to one end of the transmission shaft away from the transmission tube, and a limit ring is sleeved and fixed to one end of the connecting post that passes through the transmission frame.

[0007] Furthermore, the bottom surface of the support panel is provided with a sliding groove, and two symmetrically distributed slots are provided on the inner side of the sliding groove. The top of the locking post is fixed with two locking blocks that slide and engage with the corresponding slots.

[0008] Furthermore, the top surface of the movable plate is provided with a rectangular groove, and a rectangular airbag frame for fixing the position of the mobile phone body is fixed inside the rectangular groove. A motor is embedded and fixed inside the positioning seat, and the output end of the motor is fixedly connected to the movable plate.

[0009] Furthermore, a shaft is fixed between the two motors, a trapezoidal block is fixed on the bottom surface of the positioning seat, and a trapezoidal groove is provided on one side of the top surface of the base plate to slide and engage with the trapezoidal block at the corresponding position.

[0010] Furthermore, the bottom surface of the rack is fixed with a connecting plate that is fixedly connected to the base plate, the first transmission seat is fixedly connected to the base plate at the corresponding position, and the first transmission seat and the second transmission seat are respectively slidably connected to the top of the support panel at the corresponding position.

[0011] Furthermore, both ends of the lead screw extending into the linkage block are fitted with single-groove pulleys, and both ends inside the linkage block are rotatably connected to double-groove pulleys. A belt is used for transmission between the single-groove pulley and the corresponding double-groove pulley, and a belt is used for transmission between the two double-groove pulleys. A motor is fixed on the outside of one of the linkage blocks to drive the double-groove pulley at the corresponding position to rotate.

[0012] Furthermore, the outer side of the support panel is provided with an arc-shaped through hole, the drive shaft is slidably connected to the corresponding arc-shaped through hole, and one end of both the connecting rod one and the connecting rod two is provided with an external thread.

[0013] The beneficial effects of this invention are: 1. By holding the connecting rod one with your left hand, and fixing a mobile phone or other touch screen inside the rectangular airbag frame of the movable plate, the motor two drives the gear to rotate, causing the gear to roll on the rack, so that the movable plate moves towards the hand under the drive of the two positioning seats (at this time, the movable plate moving is the one closer to the left thumb end, refer to the instruction manual). Figure 1 At this point, the left thumb can touch the area on the phone near the thumb (refer to the instruction manual). Figure 9 The motor inside the positioning base rotates the movable plate towards the left thumb (refer to the instruction manual). Figure 10The phone rotates under the action of the movable plate, which makes the side of the phone screen away from the thumb move closer to the thumb, making it easier for the thumb to touch the side of the phone screen away from the thumb. By actively moving the phone closer to the thumb, the left hand can hold the connecting rod while touching the phone screen, eliminating the need to put down the live broadcast equipment and use the other hand to touch the phone screen. Hold the connecting rod two with your right hand (refer to the instruction manual). Figure 2 Similarly, the movable plate near the right thumb end can also be translated and rotated in the direction of the right thumb, so that the mobile phone screen can still be operated with one hand when the right hand holds the connecting rod two. This is suitable for broadcasters who like to hold the handheld rod (connecting rod two) with their right hand and hold the microphone and other live broadcast equipment with their left hand. This allows the mobile phone screen to be operated with one hand regardless of which hand is used to hold the auxiliary device, and also expands the scope of application of this application. 3. The motor drives the corresponding double-groove pulley to rotate, and under the transmission action of belt one and belt two, the two lead screws can rotate simultaneously. The rotation of the two lead screws causes transmission seat one and transmission seat two to move closer to each other. At this time, transmission seat one moves the base plate fixedly connected to it, thereby enabling the movable plate on the base plate and the mobile phone to move synchronously to the center of the top surface of the support panel. At the same time, transmission seat two moves the transmission shaft to the center of the support panel through the transmission frame. Since the transmission shaft slides in the arc-shaped through hole of the support panel, the base plate connected to transmission seat two moves the movable plate and the mobile phone to the lower position of the center of the support panel (refer to the instruction manual). Figure 11 At this point, the two lead screws continue to rotate, allowing the two base plates to continue moving and thus swapping their positions. This allows the two mobile phones on either side of the hand to be swapped, making it easier to move the phones in different positions closer to the thumb side. This facilitates thumb operation of the phone's touchscreen, enabling a single person to control multiple collection points with one hand. Attached Figure Description

[0014] The invention will now be further described with reference to the accompanying drawings.

[0015] Figure 1-2 These are schematic diagrams of the overall structure of the present invention from different perspectives; Figure 3 This is a schematic diagram of the bottom structure of the present invention; Figure 4 This is a schematic diagram of the I-shaped rod and support panel structure in this invention; Figure 5 This is a schematic diagram of the internal structure of the linkage block in this invention; Figure 6 This is a schematic diagram of the limiting transmission component and the transmission seat in this invention; Figure 7 This is a schematic diagram of the substrate structure in this invention; Figure 8 This is a schematic diagram of the movable plate structure in this invention; Figure 9 This is a schematic diagram of the movable plate translation state structure in this invention; Figure 10 This is a schematic diagram of the rotating state structure of the movable plate in this invention; Figure 11 This is a schematic diagram of the two movable plates switching positions in this invention.

[0016] In the diagram: 100, C-shaped rod; 110, connecting rod one; 120, connecting rod two; 200, support panel; 210, lead screw; 220, linkage block; 221, single-groove pulley; 222, double-groove pulley; 223, motor one; 230, transmission seat one; 240, transmission seat two; 241, transmission frame; 250, arc-shaped through hole; 300, base plate; 310, rack; 311, connecting plate; 320, trapezoidal groove; 400, positioning seat; 410, motor two; 411, shaft; 500, movable plate; 510, mobile phone body; 520, rectangular airbag frame; 600, limiting transmission component; 610, transmission pipe; 620, transmission shaft; 621, connecting column; 630, slide rod; 640, connecting block; 641, snap-fit ​​column. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figure 1-11As shown, a single-person, multi-camera audio and video acquisition auxiliary device includes a C-shaped rod 100. Connecting rod one 110 and connecting rod two 120 are fixed to both ends of the C-shaped rod 100, respectively. Two symmetrically distributed support panels 200 are provided on the top of the C-shaped rod 100. The C-shaped rod 100 is fixedly connected to the corresponding support panels 200. A lead screw 210 is rotatably connected to the inner top of each support panel 200. A linkage block 220 is provided between the two ends of each support panel 200 to allow the two lead screws 210 to rotate simultaneously. A transmission seat one 230 and a transmission seat two 240 are screwed onto the outer sides of each of the two lead screws 210, respectively. Both transmission base 230 and transmission base 240 have a base plate 300 on their outer sides. A rack 310 is fixed to one side of the base plate 300. Two symmetrically distributed positioning bases 400 are detachably and slidably attached to the top surface of the base plate 300. A motor 2 410 is fixed to the outer side of the positioning base 400. A gear that meshes with and rolls with the rack 310 is fixed to the output end of the motor 2 410. A movable plate 500 is rotatably connected between the two positioning bases 400. A mobile phone body 510 is detachably fixed to the top surface of the movable plate 500. Limit transmission components 600 are provided between the two support panels 200 and the corresponding base plate 300.

[0019] The limiting transmission component 600 includes a transmission tube 610 fixedly connected to the bottom surface of the base plate 300. A transmission shaft 620 is fixed to the outside of the transmission tube 610. A slide rod 630 is slidably inserted into the inside of the transmission tube 610. A connecting block 640 is fixed to the bottom surface of the slide rod 630. One end of the connecting block 640 is fixed with a locking post 641 that slidably engages with the bottom surface of the support panel 200. As the transmission shaft 620 moves with the transmission tube 610, the slide rod 630 slides inside the transmission tube 610, limiting the base plate 300 above the slide rod 630 to a vertical position. In the direction, to prevent the substrate 300 from rotating itself in the moving state; the bottom surface of the transmission seat 240 is fixed with a transmission frame 241, wherein a transmission shaft 620 is fixed with a connecting post 621 that is slidably connected to the transmission frame 241 at one end away from the transmission tube 610, and a limit ring is sleeved and fixed at one end of the connecting post 621 through the transmission frame 241. The transmission seat 240 moves with the transmission frame 241, causing the transmission frame 241 to move with the connecting post 621, thereby causing the transmission shaft 621 to move with the transmission tube 610, and thus causing the substrate 300 to move.

[0020] The bottom surface of the support panel 200 has a sliding groove, and the inner side of the sliding groove has two symmetrically distributed slots. The top of the locking post 641 is fixed with two locking blocks that slide and engage with the corresponding slots, so that the slide rod 630 can move stably along the support panel 200. The top surface of the movable plate 500 has a rectangular groove, and a rectangular airbag frame 520 for fixing the position of the mobile phone body 510 is fixed inside the rectangular groove. A motor is embedded inside the positioning seat 400, and the output end of the motor is fixedly connected to the movable plate 500. By inflating the rectangular airbag frame 520, it is easy to clamp and fix hands of different sizes. The motor can rotate the movable plate 500, and the two motors 410 are fixed with a shaft 411. The bottom surface of the positioning seat 400 is fixed with a trapezoidal block. A trapezoidal groove 320 is opened on one side of the top surface of the base plate 300 to slide and engage with the trapezoidal block at the corresponding position. The shaft 411 makes the two positioning seats 400 a whole. Even if one positioning seat 400 leaves the base plate 300, the other positioning seat 400 is still on the base plate 300. The sliding engagement of the positioning seat 400 on the base plate 300 not only restricts the position of the positioning seat 400, but also makes it easy to remove the positioning seat 400 from the base plate 300.

[0021] A connecting plate 311, which is fixedly connected to the base plate 300, is fixedly attached to the bottom surface of the rack 310. A transmission seat 230 is fixedly connected to the base plate 300 at a corresponding position. Transmission seat 230 and transmission seat 240 are slidably connected to the top of the support panel 200 at corresponding positions, allowing the lead screw 210 to rotate and the transmission seat 230 and transmission seat 240 to move along the top surface of the support panel 200. Single-groove pulleys 221 are sleeved and fixed at both ends of the lead screw 210 extending into the linkage block 220. Double-groove pulleys 222 are rotatably connected to both ends inside the linkage block 220. A belt 1 drives the transmission between the single-groove pulley 221 and the corresponding double-groove pulley 222, and a belt 2 drives the transmission between the two double-groove pulleys 222. One linkage block 210... A motor 223 is fixed on the outer side of the support panel 20 to drive the double groove pulley 222 at the corresponding position to rotate, so that the motor 223 drives the double groove pulley 222 at the corresponding position to rotate. Under the transmission action of belt 1 and belt 2, the two lead screws 210 can rotate simultaneously. An arc-shaped through hole 250 is opened on the outer side of the support panel 200. The transmission shaft 620 is slidably connected to the arc-shaped through hole 250 at the corresponding position. Both the connecting rod 110 and the connecting rod 220 have external threads on one end. The arc-shaped through hole 250 allows one substrate 300 to lower its height and be offset from the other moving substrate 300 when it moves. The external threads on the connecting rod 110 and the connecting rod 220 facilitate the detachable and fixed installation of the support rod of the live broadcast mobile phone.

[0022] Working Principle: The working principle is illustrated here using the example of holding connecting rod 110 in the left hand and a microphone or other live-streaming equipment in the right. An external support rod for securing the live-streaming phone is screwed onto the external thread at the end of connecting rod 120. The accompaniment phone and viewing phone (or other live-streaming phones from other platforms) are placed inside the two rectangular airbag frames 520, respectively. This allows the left hand to hold connecting rod 110, with the accompaniment phone and viewing phone positioned on either side above the left hand for the broadcaster to view. Simultaneously, the live-streaming phone on the external support rod records audio and video information for the broadcaster. The broadcaster holds the microphone in their right hand to sing or use other live-streaming equipment. When the broadcaster needs to operate the device located on the right side of their left hand, motor 410 on the right side rotates, causing the gear to roll on the rack 310. This moves the movable plate 500 towards the hand under the influence of the two positioning seats 400, allowing the left thumb to touch the screen near the thumb area (refer to the instruction manual). Figure 9 At the same time, the motor inside the positioning base 400 rotates the movable plate 500 towards the left thumb direction (refer to the instruction manual). Figure 10 The phone rotates under the action of the movable plate 500, which makes the side of the phone screen away from the thumb move closer to the thumb, making it easier for the thumb to touch the screen area away from the thumb, thus enabling the left hand to control the collection on the right side of the connecting rod 110. When the left hand needs to operate the phone on the left side of the connecting rod 110, refer to the instruction manual. Figure 1 In its initial state, motor 223 drives the double-groove pulley 222 at the corresponding position inside the linkage block 220 to rotate. Under the transmission action of belt 1 and belt 2, the two lead screws 210 can rotate simultaneously. The rotation of the two lead screws 210 causes transmission seat 1 230 and transmission seat 240 to move closer to each other. Transmission seat 1 230 moves the base plate 300 fixedly connected to it. The movable plate 500 on the base plate 300 and the mobile phone can move synchronously to the center of the top surface of the support panel 200. At the same time, transmission seat 240 moves the transmission shaft 620 to the center of the support panel 200 through the transmission frame 241. The transmission shaft 620 slides in the arc-shaped through hole 250 of the support panel 200, so that the base plate 300 connected to transmission seat 240 moves the movable plate 500 and the mobile phone to the lower position of the center of the support panel 200 (refer to the instruction manual). Figure 11As the transmission tube 610 moves with the transmission shaft 620, the slide bar 630 at the bottom of the transmission tube 610 gradually slides into the transmission tube 610, and the locking post 641 slides on the bottom surface of the support panel 200. Then, the two lead screws 210 continue to rotate so that the two base plates 300 can continue to move with the movable plate 500, thereby swapping the positions of the two base plates 300 and exchanging the positions of the collections on the two movable plates 500. After the mobile phones are swapped, the collection on the right side of the connecting rod 110 can be moved to a position close to the thumb, making it easier for the thumb to operate the mobile phone that was previously located on the left side of the connecting rod 110.

[0023] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0024] The above description is merely an example and illustration of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. A single-person, multi-camera audio and video acquisition auxiliary device, comprising a U-shaped rod (100), characterized in that, The two ends of the C-shaped rod (100) are respectively fixed with connecting rod one (110) and connecting rod two (120). The top of the C-shaped rod (100) is provided with two symmetrically distributed support panels (200). The C-shaped rod (100) is fixedly connected to the support panels (200) at the corresponding positions. The inner top of the support panel (200) is rotatably connected with a lead screw (210). There is a linkage block (220) between the two ends of the two support panels (200) for making the two lead screws (210) rotate simultaneously. The outer sides of the two lead screws (210) are respectively screwed with transmission seat one (230) and transmission seat two (240). The outer sides of both transmission seat one (230) and transmission seat two (240) are provided with a base plate (300). A rack (310) is fixed on one side of the base plate (300). The top surface of the substrate (300) is detachably slidably latched with two symmetrically distributed positioning seats (400). A second motor (410) is fixed to the outside of the positioning seat (400). A gear that meshes with and rolls with a rack (310) is fixed to the output end of the second motor (410). A movable plate (500) is rotatably connected between the two positioning seats (400). A mobile phone body (510) is detachably fixed to the top surface of the movable plate (500). Limit transmission components (600) are provided between the two support panels (200) and the corresponding substrate (300). The limiting transmission component (600) includes a transmission tube (610) fixedly connected to the bottom surface of the base plate (300), a transmission shaft (620) fixed on the outside of the transmission tube (610), a slide rod (630) slidably inserted inside the transmission tube (610), a connecting block (640) fixed on the bottom surface of the slide rod (630), and a snap-fit ​​post (641) fixed at one end of the connecting block (640) that slidably snaps into the bottom surface of the support panel (200). A transmission frame (241) is fixed on the bottom surface of the transmission seat 2 (240). One end of the transmission shaft (620) away from the transmission tube (610) is fixed with a connecting column (621) that is slidably connected to the transmission frame (241). A limit ring is sleeved and fixed at one end of the connecting column (621) that passes through the transmission frame (241). The first transmission seat (230) is fixedly connected to the corresponding base plate (300), and the first transmission seat (230) and the second transmission seat (240) are slidably connected to the top of the corresponding support panel (200).

2. The single-person multi-camera audio and video acquisition auxiliary device according to claim 1, characterized in that, The bottom surface of the support panel (200) is provided with a sliding groove, and two symmetrically distributed slots are provided on the inner side of the sliding groove. The top of the locking post (641) is fixed with two locking blocks that are respectively slidably locked in the corresponding slots.

3. The single-person multi-camera audio and video acquisition auxiliary device according to claim 1, characterized in that, The top surface of the movable plate (500) is provided with a rectangular groove, and a rectangular airbag frame (520) for fixing the position of the mobile phone body (510) is fixed inside the rectangular groove. A motor is embedded and fixed inside the positioning seat (400), and the output end of the motor is fixedly connected to the movable plate (500).

4. The single-person multi-camera audio and video acquisition auxiliary device according to claim 1, characterized in that, A shaft (411) is fixed between the two motors (410), a trapezoidal block is fixed on the bottom surface of the positioning seat (400), and a trapezoidal groove (320) is opened on one side of the top surface of the base plate (300) to slide and engage with the trapezoidal block at the corresponding position.

5. A single-person multi-camera audio and video acquisition auxiliary device according to claim 1, characterized in that, The bottom surface of the rack (310) is fixed with a connecting plate (311) that is fixedly connected to the base plate (300).

6. The single-person multi-camera audio and video acquisition auxiliary device according to claim 1, characterized in that, The lead screw (210) extends into the linkage block (220) and is fixed with single-groove pulleys (221) at both ends. The linkage block (220) is rotatably connected with double-groove pulleys (222) at both ends. A belt is driven between the single-groove pulley (221) and the corresponding double-groove pulley (222). A belt is driven between the two double-groove pulleys (222). A motor (223) is fixed on the outside of one of the linkage blocks (220) to drive the double-groove pulley (222) at the corresponding position to rotate.

7. A single-person multi-camera audio and video acquisition auxiliary device according to claim 1, characterized in that, The outer side of the support panel (200) is provided with an arc-shaped through hole (250), and the drive shaft (620) is slidably connected to the corresponding arc-shaped through hole (250). Both the first connecting rod (110) and the second connecting rod (120) have external threads on one side.

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