Wall fixing base for multimedia equipment

Abstract

The application discloses a wall fixing base for a multimedia device, which belongs to the technical field of multimedia devices and comprises a fixing base, a mounting rack arranged at the front of the fixing base and capable of rotating at multiple angles, a connecting mechanism arranged between the mounting rack and the fixing base and used for connecting the mounting rack and the fixing base and ensuring that the mounting rack can move forward and backward, a protection mechanism arranged on the surface of the mounting rack and used for protecting the multimedia device in a closed state, a driving mechanism arranged on the surface of the mounting rack and used for driving the protection mechanism to be in an unfolded or closed state and driving the mounting rack to move forward and backward according to the unfolded or closed state of the protection mechanism. The device has the advantages of simple structure, convenient use, display screen rotation driving, improved display effect and good protection effect on the display screen after being folded.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of multimedia equipment, in particular to a wall fixing base for multimedia equipment. BACKGROUND

[0002] Multimedia technology is a technology that enables users to exchange real-time information with computers through various senses by storing and managing various information such as language, text, data, audio, and video. The content displayed and carried by multimedia technology is actually a product of computer technology.

[0003] In some supermarkets and some stations, display screens are used to display some messages that need to be formulated for people to watch. In order to improve the display effect of the display screen, the display screen is usually fixed on the wall, so some supports are needed to fix the display screen. Since the existing supports are usually not adjustable, the display screen can only display in one direction. In stations or supermarkets with large flow of people, people in the viewing dead angle need to move to the front of the display screen to watch the message. Since the non-business hours in supermarkets and other places need to arrange goods, the staff needs to use a ladder to arrange goods at a high place. The ladder may touch the display screen during movement. SUMMARY

[0004] The purpose of the present application is to provide a wall fixing base for multimedia equipment to solve the problem of the existing display screen that cannot adjust the angle and has no protection effect.

[0005] To achieve the above purpose, the present application provides the following technical scheme: a wall fixing base for multimedia equipment, comprising a fixing base, an installation frame is arranged at the front of the fixing base, and the installation frame can rotate at multiple angles; a connecting mechanism is arranged between the installation frame and the fixing base, which is used to connect the installation frame and the fixing base and ensure that the installation frame can move forward and backward; a protection mechanism is arranged on the surface of the installation frame, which is used to protect the multimedia equipment in the closed state; a driving mechanism is arranged on the surface of the installation frame, which is used to drive the protection mechanism to be in the unfolded or closed state, and to drive the installation frame to move forward and backward according to the unfolded and closed state of the protection mechanism.

[0006] The protection mechanism comprises two protection plates, a display screen is arranged at the middle part of the rear side of the two protection plates, and the display screen is fixedly connected with the installation frame; a fixing frame is fixedly connected above the installation frame, first connecting rods are symmetrically and rotatably connected above the left and right sides of the fixing frame, one end of the left first connecting rod is rotatably connected with the left side of the left protection plate, and the other end of the right first connecting rod is rotatably connected with the right side of the right protection plate.

[0007] The driving mechanism comprises a motor fixedly connected with the fixed frame and having a driving rod fixedly connected with the front end of the motor output shaft; a worm is rotatably connected to the front side of the fixed frame, and worms are symmetrically engaged on the left and right sides of the worm; the worm is rotatably connected with the fixed frame, and the left and right worms are coaxially fixedly connected with the left and right first connecting rods; the worm is hollow and the driving rod is gap-fitted with the worm, and the inner wall of the worm and the surface of the driving rod are fixedly connected with driving blocks; the fixed frame is provided with an unfolding mechanism, which is used to drive the protective plate to unfold first when the driving mechanism drives the connecting rod to open the protective plate, so as to prevent the protective plate from touching the display screen when moving.

[0008] The unfolding mechanism comprises two rotating frames coaxially fixedly connected with the two worms; a sliding rod is slidably connected to the rotating frame, the bottom end of the sliding rod is fixedly connected with a first connecting plate, and a first spring is sleeved on the surface of the sliding rod, one end of the first spring is fixedly connected with the rotating frame, and the other end of the first spring is fixedly connected with the first connecting plate; the first connecting rod is provided with a pulling mechanism, which is used to pull the protective plate relative to the first connecting rod when the sliding rod slides downward; the pressing mechanism is arranged on the upper side of the first connecting rod on the left and right sides, which is used to press the sliding rod downward before the driving mechanism drives the first connecting rod on the left and right sides to rotate.

[0009] The pulling mechanism comprises a line wheel, which is located at the position where the protective plate is connected with the first connecting rod and is fixedly connected with the protective plate, a torsional spring is arranged between the line wheel and the first connecting rod, one end of the torsional spring is fixedly connected with the line wheel and the other end is fixedly connected with the first connecting rod, and a pulling rope is fixedly connected with the surface of the line wheel; a guide wheel is rotatably connected to the other end of the first connecting rod, the pulling rope is wound on the surface of the guide wheel and penetrates through the first connecting rod, the worm and the rotating frame; the other end of the pulling rope is fixedly connected with the first connecting plate.

[0010] The pressing mechanism comprises a first pressing block fixedly connected with the driving rod; a second pressing block is fixedly connected to the upper end of the left sliding rod; arc-shaped pressing plates are symmetrically fixedly connected to the left and right sides of the fixed frame, and the arc-shaped pressing plates are located at the bottom of the second pressing block; second connecting plates are arranged at the bottom of the first connecting plate on the left and right sides, and the second connecting plates are rotatably connected with the first connecting plates on the left and right sides.

[0011] The connecting mechanism comprises two second connecting rods and a third connecting rod, the two second connecting rods are arranged at left and right sides of the mounting frame, the third connecting rod is arranged at the upper side of the mounting frame, and the second connecting rod and the third connecting rod are rotationally connected with the mounting frame; the fixing base is provided with a first sliding groove and a second sliding groove, the first sliding groove is symmetrically provided with first sliding blocks at left and right sides, and the second sliding groove is provided with a second sliding block; the two first sliding blocks are rotationally connected with the two second connecting rods respectively, and the second sliding block is rotationally connected with the third connecting rod; the first sliding block and the second sliding block are both fixedly connected with second springs, and the other ends of the second springs are fixedly connected with the fixing base.

[0012] The first connecting rod is fixedly connected with an arc-shaped limiting frame, and the limiting plate is slidably connected with a limiting rod.

[0013] The fixing base is provided with a groove at a position with the same height as the first sliding blocks at left and right sides, and the width of the groove is greater than the width of the first sliding block; the groove is slidably connected with a baffle, and the baffle is slidably connected with the fixing base and fixedly connected with the limiting rod.

[0014] The arc-shaped limiting frame is in a spiral rising shape, and the front end portion of the arc-shaped limiting frame is higher than the rear end portion, and the height difference is equal to the width of the groove.

[0015] Compared with the prior art, the present application has the following advantages:

[0016] 1. The protection mechanism can protect the display screen when the display screen is in a non-working state, effectively improving the safety of the display screen; when the display screen needs to be used, the driving mechanism is started, the driving mechanism drives the protection mechanism to unfold, and the mounting frame is also driven to move forward, and the mounting frame drives the display screen to move forward; when the protection mechanism is completely unfolded, the mounting frame drives the display screen to move to the most forward position; at this time, the display screen is opened, and since the display screen is in the most forward position, the display screen is far enough from the wall, and then the driving mounting frame drives the display screen to rotate downward to a suitable angle, and then drives the display screen to swing left and right, thereby improving the display range of the display screen.

[0017] 2. After the display screen is used, the mounting frame drives the display screen to return to the original position, and then the driving mechanism drives the protection mechanism to close, and after the protection mechanism is closed, the mounting frame drives the display screen to move to a position close to the wall under the action of the connecting mechanism, thereby saving space and reducing the risk of being touched, and the protection mechanism can also protect the display screen from being damaged when being touched. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Schematic diagram of the overall structure of the present application;

[0019] Figure 2 Schematic diagram of the overall structure of the present application; Figure 1 Schematic diagram of the overall structure of the present application;

[0020] Figure 3 Schematic diagram of the overall structure of the present application;

[0021] Figure 4 Schematic diagram of the overall structure of the present application;

[0022] Figure 5 Schematic diagram of the overall structure of the present application;

[0023] Figure 6 Schematic diagram of the overall structure of the present application;

[0024] Figure 7 Schematic diagram of the overall structure of the present application;

[0025] Figure 8 Schematic diagram of the overall structure of the present application;

[0026] Figure 9 Schematic diagram of the overall structure of the present application;

[0027] Figure 10 Schematic diagram of the overall structure of the present application; Figure 9 Schematic diagram of the overall structure of the present application;

[0028] In the drawings, the components represented by the respective reference numerals are listed as follows:

[0029] 1, fixed seat; 2, mounting bracket; 3, protective plate; 4, display screen; 5, fixed frame; 6, first connecting rod; 7, motor; 8, drive rod; 9, worm; 10, worm gear; 11, drive block; 12, rotating frame; 13, sliding rod; 14, first connecting plate; 15, first spring; 16, wire reel; 17, torsion spring; 18, pull rope; 19, guide wheel; 20, first pressing block; 21, second pressing block; 22, arc-shaped pressing plate; 23, second connecting plate; 24, second connecting rod; 25, third connecting rod; 26, first sliding groove; 27, second sliding groove; 28, first sliding block; 29, second sliding block; 30, second spring; 31, arc-shaped limiting frame; 32, limiting rod; 33, groove; 34, baffle. DETAILED DESCRIPTION

[0030] Please refer to Figures 1-10The application provides a technical scheme: a wall fixing base for a multimedia device, which comprises a fixing base 1, a mounting rack 2 arranged at the front of the fixing base 1, the mounting rack 2 being capable of rotating at multiple angles, and the display screen 4 being capable of swinging at multiple angles when the mounting rack 2 is driven, thereby facilitating more people to watch; a connecting mechanism is arranged between the mounting rack 2 and the fixing base 1, the connecting mechanism being used for connecting the mounting rack 2 and the fixing base 1 and ensuring that the mounting rack 2 can move forward and backward; a protection mechanism is arranged on the surface of the mounting rack 2, the protection mechanism being used for protecting the multimedia device in a closed state; a driving mechanism is arranged on the surface of the mounting rack 2, the driving mechanism being used for driving the protection mechanism to be in an unfolded or closed state and simultaneously driving the mounting rack 2 to move forward and backward according to the unfolded or closed state of the protection mechanism;

[0031] When working, the multimedia technology is used for storing and managing various information such as language, data, audio and video by means of a computer, so that users can exchange real-time information with the computer through multiple senses. The content displayed and carried by the multimedia technology is actually a product of computer technology.

[0032] In some supermarkets and some stations, display screens are used to display some messages for people to watch. In order to improve the display effect of the display screen, the display screen is usually fixed on the wall, and therefore some supports are needed to fix the display screen. Since the existing supports are usually not adjustable, the display screen can only display in one direction. In a station or a supermarket, people in a dead angle need to move to the front of the display screen to watch the message. Since the supermarket is not open during non-business hours, the goods need to be arranged, and the staff need to use a ladder to arrange the goods at a high place. The ladder may touch the display screen during movement.

[0033] For example, Figure 1 , Figure 3As shown, when the display screen 4 is installed on the mounting frame 2, the protection mechanism can play a protective role when the display screen 4 is in a non-working state, which can effectively improve the safety of the display screen 4; when the display screen 4 needs to be used, the driving mechanism is started, which can drive the protection mechanism to unfold, and also drive the mounting frame 2 to move forward, and the mounting frame 2 moves forward and drives the display screen 4 to move forward; when the protection mechanism is completely unfolded, the mounting frame 2 drives the display screen 4 to move to the most forward position; at this time, the display screen 4 is opened, and since the display screen 4 is in the most forward position, the display screen 4 is far enough from the wall, and then the driving mounting frame 2 drives the display screen 4 to rotate downward to a suitable angle, and then drives the display screen 4 to swing left and right, so as to improve the display range of the display screen 4; when the display screen 4 is used up, the driving mounting frame 2 drives the display screen 4 to return to the original position, and then the driving mechanism is started to drive the protection mechanism to close, and after the protection mechanism is closed, under the action of the connecting mechanism, the mounting frame 2 drives the display screen 4 to move to the position close to the wall, which can save space and reduce the risk of being touched, and the protection mechanism can also protect the display screen 4 from being damaged when touched.

[0034] As shown in Figure 3 , Figure 5 As a further scheme of the application, the protection mechanism comprises two protection plates 3, the display screen 4 is arranged at the middle position of the rear side of the two protection plates 3, and the display screen 4 is fixedly connected with the mounting frame 2; the fixed frame 5 is fixedly connected above the mounting frame 2, the first connecting rod 6 is symmetrically and rotatably connected above the left and right sides of the fixed frame 5, the other end of the left first connecting rod 6 is rotatably connected with the left side of the left protection plate 3, and the other end of the right first connecting rod 6 is rotatably connected with the right side of the right protection plate 3; in operation, the two protection plates 3 are arranged in front of the display screen 4, which can effectively avoid the front impact of external objects on the screen of the display screen 4, and can effectively protect the display screen 4; when the display screen 4 needs to be used, the driving mechanism drives the two first connecting rods 6 to rotate, which can drive the left and right protection plates 3 to rotate and unfold, so that the display screen 4 is exposed and used normally.

[0035] As shown in Figure 2 , Figures 5-6 , Figure 10As shown, as a further scheme of the present application, the driving mechanism comprises a motor 7 fixedly connected with the fixed frame 5 and having a driving rod 8 fixedly connected at the front end of the output shaft of the motor 7; a worm 9 is rotatably connected at the front side of the fixed frame 5, and worms 9 symmetrically meshed at the left and right sides of the worm 9 are coaxially fixedly connected with the left and right worm gears 10, which are rotatably connected with the fixed frame 5; the worm 9 is hollow and the driving rod 8 is gap-fitted with the worm 9, and the inner wall of the worm 9 and the surface of the driving rod 8 are fixedly connected with driving blocks 11; the fixed frame 5 is provided with an unfolding mechanism for driving the protective plate 3 to unfold first when the driving mechanism drives the connecting rod to open the protective plate 3, so as to prevent the protective plate 3 from touching the display screen 4 when moving; the unfolding mechanism comprises two rotating frames 12 coaxially fixedly connected with the two worm gears 10; a sliding rod 13 is slidingly connected with the rotating frame 12, the bottom end of the sliding rod 13 is fixedly connected with a first connecting plate 14, and a first spring 15 is sleeved on the surface of the sliding rod 13, one end of the first spring 15 is fixedly connected with the rotating frame 12, and the other end of the first spring 15 is fixedly connected with the first connecting plate 14; the first connecting rod 6 is provided with a pulling mechanism for pulling the protective plate 3 to rotate relative to the first connecting rod 6 when the sliding rod 13 slides downward; the left and right first connecting rods 6 are provided with pressing mechanisms at the upper side positions, which are used for pressing the left and right sliding rods 13 downward before the driving mechanism drives the left and right first connecting rods 6 to rotate; the pulling mechanism comprises a line reel 16 located at the position where the protective plate 3 is connected with the first connecting rod 6 and fixedly connected with the protective plate 3, a torsional spring 17 is arranged between the line reel 16 and the first connecting rod 6, one end of the torsional spring 17 is fixedly connected with the line reel 16 and the other end is fixedly connected with the first connecting rod 6, and a pull rope 18 is fixedly connected with the surface of the line reel 16; a guide wheel 19 is rotatably connected at the other end of the first connecting rod 6, the pull rope 18 is wound on the surface of the guide wheel 19 and penetrates through the first connecting rod 6, the worm gear 10 and the rotating frame 12; the other end of the pull rope 18 is fixedly connected with the first connecting plate 14; the pressing mechanism comprises a first pressing block 20 fixedly connected with the driving rod 8; a second pressing block 21 is fixedly connected at the upper end of the left sliding rod 13; arc-shaped pressing plates 22 are symmetrically fixedly connected at the left and right positions of the fixed frame 5, and the arc-shaped pressing plates 22 are located at the bottom positions of the second pressing blocks 21; second connecting plates 23 are arranged at the bottom positions of the left and right first connecting plates 14 and are rotatably connected with the left and right first connecting plates 14; when it is needed to drive the left and right protective plates 3 to unfold, the motor 7 is started to drive the driving rod 8 to rotate, the driving blocks 11 on the surface of the driving rod 8 will rotate with the driving rod 8 when the driving rod 8 rotates, and the driving blocks 11 on the surface of the driving rod 8 will be in close contact with the driving blocks 11 on the inner wall of the worm 9 when the driving rod 8 rotates by a certain angle, thereby driving the worm 9 to rotate;Before the driving rod 8 drives the worm 9 to rotate, the driving rod 8 will first drive the first pressing block 20 to rotate counterclockwise along with the driving rod 8, and when the first pressing block 20 rotates counterclockwise, it will start to contact and press the second pressing block 21 on the left side to move downward, and the second pressing block 21 will drive the slide rod 13 on the left side to slide downward, and the slide rod 13 on the left side will drive the slide rod 13 on the right side and the second connecting plate 23 on the right side to move downward through the second connecting plate 23; when the second connecting plates 23 on the left and right sides move downward, they will pull the pull ropes 18 on the left and right sides respectively, and after the pull ropes 18 on the left and right sides are pulled, they will drive the line wheels 16 on the left and right sides to rotate respectively, and when the line wheels 16 rotate, they will drive the protective plates 3 connected thereto to rotate outward relative to the first connecting rods 6; when the first connecting plates 14 on the left and right sides move to the bottom position, the protective plates 3 rotate to a position where the first connecting rods 6 form a ninety-degree angle, and the slide rods 13 on the left and right sides are located at the bottom of the arc-shaped pressing plate 22; at the same time, the driving block 11 on the surface of the driving rod 8 starts to fit the driving block 11 on the inner wall of the worm 9, and when the driving rod 8 continues to rotate, it drives the worm 9 to rotate, and when the worm 9 rotates, it drives the slide rods 13 on the left and right sides to move to the bottom of the arc-shaped pressing plate 22 on the left and right sides respectively and start to contact the arc-shaped pressing plate 22, at this time, the first pressing block 20 starts to separate from the second pressing block 21, and under the pressing action of the arc-shaped pressing plate 22, the slide rod 13 cannot be reset, so that the protective plates 3 remain in a state of forming a ninety-degree angle with the first connecting rods 6; when the worm gear 10 drives the first connecting rod 6 to rotate, the first connecting rod 6 drives the protective plates 3 to rotate along with the first connecting rod 6; when the first connecting rod 6 drives the protective plates 3 to rotate to a position where they contact the fixed seat 1, the worm gear 10 continues to drive the first connecting rod 6 to rotate, and because the distance between the protective plates 3 on the left and right sides is getting closer and closer, the angle between the first connecting rods 6 on the left and right sides is also getting smaller and smaller, so through the two protective plates 3 and the two first connecting rods 6, the mounting frame 2 can be squeezed forward, so that the mounting frame 2 is subjected to a forward thrust, and the mounting frame 2 will move forward;

[0036] When the display screen 4 is used, the motor 7 is started to drive the driving rod 8 to rotate reversely, the driving rod 8 drives the driving blocks 11 on the surface to rotate reversely to the driving blocks 11 on the inner wall of the worm 9, and then the worm 9 is reversely rotated, the worm 9 drives the first connecting rods 6 on the left and right sides to gradually reset through the worm gears 10 on the left and right sides, the first connecting rods 6 drive the protective plates 3 to move, when the first connecting rods 6 on the left and right sides are rotated to the original position, the arc-shaped baffle 22 no longer blocks the slide rod 13, the slide rod 13 on the surface of the rotating frame 12 is separated from the blocking of the arc-shaped pressing plate 22 and is reset under the action of the first spring 15, the slide rod 13 drives the first connecting plate 14 connected thereto to reset after the reset of the slide rod 13, the first connecting plate 14 loses the pulling force, the protective plates 3 and the thread reel 16 are reset under the action of the torsional spring 17, the protective plates 3 are reset and are in the role of protecting the display screen 4, and the thread reel 16 winds the pulling rope 18.

[0037] As shown in Figure 8 As further schemes of the present application, the connecting mechanism comprises two second connecting rods 24 and a third connecting rod 25, the two second connecting rods 24 are distributed on the left and right sides of the mounting frame 2, the third connecting rod 25 is distributed on the upper side of the mounting frame 2, and the second connecting rods 24 and the third connecting rod 25 are rotationally connected with the mounting frame 2; the surface of the fixed seat 1 is provided with a first sliding groove 26 and a second sliding groove 27, the first sliding groove 26 is symmetrically and slidingly connected with first sliding blocks 28 on the left and right sides, and the second sliding groove 27 is slidingly connected with a second sliding block 29; the two first sliding blocks 28 are rotationally connected with the two second connecting rods 24 respectively, and the second sliding block 29 is rotationally connected with the third connecting rod 25; the first sliding blocks 28 and the second sliding block 29 are fixedly connected with second springs 30, and the other ends of the second springs 30 are fixedly connected with the fixed seat 1; when the first connecting rods 6 on the left and right sides drive the protective plates 3 on the left and right sides to rotate to the positions in contact with the fixed seat 1, the mounting frame 2 is subjected to a forward pushing force when the first connecting rods 6 continue to rotate, the mounting frame 2 drives the first sliding blocks 28 on the left and right sides to slide to the positions close to each other through the two second connecting rods 24, and drives the second sliding block 29 to slide downward through the third connecting rod 25, so that the mounting frame 2 is supported by the second connecting rods 24 on the left and right sides and the third connecting rod 25; when the first connecting rods 6 on the left and right sides and the protective plates 3 are reset, the first sliding blocks 28 on the left and right sides and the second sliding block 29 start to reset under the action of the second springs 30, so that the mounting frame 2 is driven to move to the rear position through the second connecting rods 24 on the left and right sides and the third connecting rod 25.

[0038] As shown in Figure 5As shown, as a further embodiment of the present invention, an arc-shaped limiting frame 31 is fixedly connected to the surface of the first connecting rod 6; a limiting rod 32 is slidably connected to the protective plate 3, and the limiting rod 32 and the arc-shaped limiting frame 31 are in clearance fit; during operation, when the pull rope 18 pulls the spool 16 to rotate, the spool 16 will drive the protective plate 3 to rotate relative to the first connecting rod 6. The arc-shaped limiting frame 31 can make the maximum angle between the protective plate 3 and the first connecting rod 6 ninety degrees. After the pull rope 18 loses its tension, when the torsion spring 17 drives the protective plate 3 to rotate relative to the first connecting rod 6, the arc-shaped limiting frame 31 can make the protective plate 3 be in a position close to the display screen 4.

[0039] like Figure 5 , Figure 9 As shown, as a further embodiment of the present invention, a groove 33 is formed on the surface of the protective plate 3 at a height equal to that of the first sliders 28 on the left and right sides. The width of the groove 33 is greater than the width of the first sliders 28. A baffle 34 is slidably connected inside the groove 33. The baffle 34 is slidably connected to the protective plate 3 and fixedly connected to the limiting rod 32. The arc-shaped limiting frame 31 is spirally rising. The front end of the arc-shaped limiting frame 31 is higher than the rear end, and the height difference is equal to the width of the groove 33. When the protective plate 3 is in the protective state during operation, the baffle 34 can block the groove 33, thereby ensuring the protective effect of the protective plate 3. When the display screen 4 needs to be used, By driving the protective plate 3 to rotate relative to the first connecting rod 6, the protective plate 3 will drive the limiting rod 32 to move within the arc-shaped limiting frame 31. Under the action of the arc-shaped limiting frame 31, the limiting rod 32 will gradually move upward, and when the limiting rod 32 moves upward, it will drive the baffle 34 to move upward. When the protective plate 3 rotates to a position with a 90-degree angle to the first connecting rod 6, the limiting rod 32 moves to the highest position of the arc-shaped limiting frame 31, and the baffle 34 moves to a position above the groove 33. When the baffles 34 on the left and right sides rotate to a position that fits against the fixed seat 1 and continue to rotate, the first sliders 28 on the left and right sides will pass through the groove 33 and will not block the protective plate 3.

Claims

1. A wall fixing base for a multimedia device comprising a fixing base (1), characterised in that: The front position of the fixed seat (1) is provided with a mounting rack (2), the position between the mounting rack (2) and the fixed seat (1) is provided with a connecting mechanism, the connecting mechanism is used for connecting the mounting rack (2) and the fixed seat (1) and ensuring that the mounting rack (2) can move forward and backward; The surface of the mounting rack (2) is provided with a protection mechanism, the protection mechanism is used for protecting the multimedia equipment in the closed state; The surface of the mounting rack (2) is provided with a driving mechanism, the driving mechanism is used for driving the protection mechanism to be in the unfolded or closed state, and driving the mounting rack (2) to move forward and backward according to the unfolding and closing state of the protection mechanism; The protection mechanism comprises two protection plates (3), the rear middle position of the two protection plates (3) is provided with a display screen (4), the display screen (4) is fixedly connected with the mounting rack (2); The mounting rack (2) is fixedly connected with a fixed frame (5) above, the first connecting rod (6) is rotatably connected to the left side of the fixed frame (5) above, the other end of the first connecting rod (6) on the left side is rotatably connected to the left side of the protection plate (3) above, and the other end of the first connecting rod (6) on the right side is rotatably connected to the right side of the protection plate (3) above; The driving mechanism comprises a motor (7), the motor (7) is fixedly connected with the fixed frame (5), and the output shaft of the motor (7) is fixedly connected with a driving rod (8) at the front end; The front side of the fixed frame (5) is rotatably connected with a worm (9), the left and right sides of the worm (9) are symmetrically meshed with worm gears (10), the worm gears (10) are rotatably connected with the fixed frame (5), and the left and right worm gears (10) are coaxially fixedly connected with the left and right first connecting rods (6) respectively; The worm (9) is hollow, the driving rod (8) is matched with the worm (9) in the gap, and the inner wall of the worm (9) and the surface of the driving rod (8) are fixedly connected with driving blocks (11); The fixed frame (5) is provided with an unfolding mechanism, the unfolding mechanism is used for unfolding the protection plate (3) first when the driving mechanism drives the connecting rod to open the protection plate (3), so as to prevent the protection plate (3) from touching the display screen (4) when moving; The unfolding mechanism comprises two rotating frames (12), and the two rotating frames (12) are coaxially fixedly connected with the two worm gears (10) respectively; The rotating frame (12) is slidably connected with a sliding rod (13), the bottom end of the sliding rod (13) is fixedly connected with a first connecting plate (14), and the surface of the sliding rod (13) is sleeved with a first spring (15), one end of the first spring (15) is fixedly connected with the rotating frame (12), and the other end of the first spring (15) is fixedly connected with the first connecting plate (14); The first connecting rod (6) is provided with a pulling mechanism, the pulling mechanism is used for pulling the protection plate (3) to rotate relative to the first connecting rod (6) when the sliding rod (13) slides downward; The upper side of the first connecting rod (6) on the left and right sides is provided with a pressing mechanism, the pressing mechanism is used for pressing the left and right sliding rods (13) downward before the driving mechanism drives the left and right first connecting rods (6) to rotate.

2. The wall mount base for a multimedia device of claim 1, wherein: The pulling mechanism comprises a line wheel (16), the line wheel (16) is located at the position where the guard plate (3) is connected with the first connecting rod (6), and the line wheel (16) is fixedly connected with the guard plate (3); a torsional spring (17) is arranged between the line wheel (16) and the first connecting rod (6), one end of the torsional spring (17) is fixedly connected with the line wheel (16), and the other end is fixedly connected with the first connecting rod (6); and a pulling rope (18) is fixedly connected with the surface of the line wheel (16); a guide wheel (19) is rotatably connected to the other end of the first connecting rod (6), the pulling rope (18) is wound on the surface of the guide wheel (19) and penetrates through the first connecting rod (6), the worm gear (10) and the rotating frame (12); and the other end of the pulling rope (18) is fixedly connected with the first connecting plate (14).

3. The wall mount base for a multimedia device of claim 1, wherein: The pressing mechanism comprises a first pressing block (20), the first pressing block (20) is fixedly connected with the driving rod (8); a second pressing block (21) is fixedly connected to the upper end of the left slide rod (13); arc-shaped pressing plates (22) are symmetrically fixedly connected to the left and right sides of the fixed frame (5), and the arc-shaped pressing plates (22) are located at the bottom of the second pressing block (21); second connecting plates (23) are arranged at the bottom of the left and right first connecting plates (14), and the second connecting plates (23) are rotatably connected with the left and right first connecting plates (14) at the same time.

4. The wall mount base for a multimedia device of claim 1, wherein: The connecting mechanism comprises two second connecting rods (24) and a third connecting rod (25), the two second connecting rods (24) are arranged on the left and right sides of the mounting frame (2), and the third connecting rod (25) is arranged on the upper side of the mounting frame (2); the second connecting rod (24) and the third connecting rod (25) are rotatably connected with the mounting frame (2); first sliding grooves (26) and second sliding grooves (27) are formed in the surface of the fixed seat (1), first sliding blocks (28) are symmetrically and slidably connected in the left and right sides of the first sliding grooves (26), and a second sliding block (29) is slidably connected in the second sliding groove (27); the two first sliding blocks (28) are rotatably connected with the two second connecting rods (24), and the second sliding block (29) is rotatably connected with the third connecting rod (25); second springs (30) are fixedly connected to the first sliding block (28) and the second sliding block (29), and the other ends of the second springs (30) are fixedly connected with the fixed seat (1).

5. The wall mount base for a multimedia device of claim 4, wherein: An arc-shaped limiting frame (31) is fixedly connected to the surface of the first connecting rod (6); a limiting rod (32) is slidably connected to the guard plate (3), and the limiting rod (32) is in clearance fit with the arc-shaped limiting frame (31).

6. The wall mount base for a multimedia device of claim 5, wherein: A groove (33) is formed in the surface of the guard plate (3) at a position with the same height as the left and right first sliding blocks (28), the width of the groove (33) is greater than the width of the first sliding block (28); a baffle (34) is slidably connected in the groove (33), the baffle (34) is slidably connected with the guard plate (3) and fixedly connected with the limiting rod (32).

7. The wall mount base for a multimedia device of claim 6, wherein: The arc-shaped limiting frame (31) is in a spiral ascending shape, and the front end part of the arc-shaped limiting frame (31) is higher than the rear end part, and the height difference is equal to the width of the groove (33).

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