A magnetic fixing structure for a multi-screen linkage display

Abstract

A magnetic fixing structure for a multi-screen linkage display device, the invention relates to the technical field of display devices, wherein adjustment boxes are symmetrically fixedly arranged on the upper and lower side surfaces of a fixing plate, and clamping arms are symmetrically and movably inserted on the left and right sides of one side of the adjustment box, and the clamping arms are arranged in an "L" shape; two sleeves are symmetrically fixedly arranged on the left and right side walls of the fixing plate, and the other ends of the two sleeves on the same side are arranged obliquely to the upper and lower sides respectively; the ends of the sleeves are movably inserted with insertion rods; a mounting plate is fixedly arranged on the outer end of the insertion rod, and a No. 2 electromagnet is fixedly arranged on the front side wall of the mounting plate, and the No. 2 electromagnet is connected to an external power supply; the outer side surfaces of the No. 1 electromagnet and the No. 2 electromagnet are arranged in the same plane, and the size of the magnetic attraction structure can be adjusted according to screens of different sizes, and the scope of application is wider. At the same time, it is convenient to disassemble, repair or replace the display screen, and the installation is convenient and quick.

Description

Technical Field

[0001] The present invention relates to the technical field of display devices, and in particular to a magnetic attraction fixing structure of a multi-screen linkage display. Background Art

[0002] Multi-screen linkage refers to a multi-screen linkage display system based on interactive applications and with two or more high-definition touch display systems as the hardware platform. One of the multiple screens can be selected as the main control screen, and other screens can be controlled by touching the main screen to display richer content for users. The display content is divided into multiple objects, and multiple screens are linked to display different related content of the same object, such as text, pictures, videos, etc., which brings a new interactive display form to users. Multi-screen linkage displays generally require multiple screens to be installed on the wall or rack where they need to be displayed. In the prior art, the display screen is generally fixed directly on the wall or rack, which is cumbersome when the screen needs to be replaced or repaired. Therefore, a magnetic fixing structure for a multi-screen linkage display is urgently needed. Summary of the invention

[0003] The purpose of the present invention is to address the defects and shortcomings of the prior art and provide a magnetic fixing structure for a multi-screen linkage display that is simple in structure, reasonably designed, and easy to use. The size of the magnetic structure can be adjusted according to screens of different sizes, and the scope of application is wider. At the same time, it is convenient to disassemble, repair or replace the display screen, and the installation is convenient and quick.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: it comprises a fixing plate, a clamping mechanism and a magnetic attraction mechanism; connecting pieces are symmetrically fixedly arranged on the left and right side walls of the fixing plate; a No. 1 electromagnet is fixedly arranged on the front side surface of the fixing plate, and the No. 1 electromagnet is connected to an external power supply; a clamping mechanism is symmetrically fixedly arranged on the upper and lower side surfaces of the fixing plate, and a magnetic attraction mechanism is fixedly arranged on the left and right side surfaces of the fixing plate; the clamping mechanism comprises an adjusting box, a clamping arm, a connecting plate, a compression spring and a telescopic rod; an adjusting box is symmetrically fixedly arranged on the upper and lower side surfaces of the fixing plate, and a clamping arm is symmetrically and movably inserted on the left and right sides of one side surface of the adjusting box, and the clamping arm is arranged in an "L" shape, and the vertical end of the clamping arm is inserted into the interior of the adjusting box, and a connecting plate is fixedly connected between the inserted ends, and a telescopic rod is symmetrically and vertically fixedly arranged on the left and right sides of one side surface of the connecting plate, and the other end of the telescopic rod is fixedly connected to the inner side wall of the adjusting box, and a compression spring is sleeved on the outer side of the telescopic rod, one end of the compression spring is arranged to conflict with the inner side wall of the adjusting box, and the other end is arranged to conflict with the side wall of the connecting plate;

[0005] The magnetic attraction mechanism comprises a sleeve, an insertion rod, a mounting plate, a No. 1 gear, a No. 2 gear, a No. 2 hand-tightening gear, a synchronous wheel and a synchronous belt; two sleeves are symmetrically fixedly arranged on the left and right side walls of the fixed plate, and the other ends of the two sleeves on the same side are inclined to the upper and lower sides respectively; the ends of the sleeves are movably inserted with insertion rods, and racks are arranged on the opposite surfaces of the insertion rods on the upper and lower sides, and No. 1 gears are rotatably arranged on the opposite surfaces of the sleeves on the upper and lower sides through the shaft seat, and one side of the No. 1 gear is arranged to mesh with the rack on the insertion rod after moving through the side wall of the sleeve; the No. 1 gear on one side of the upper side is arranged A No. 2 gear is rotatably arranged on the sleeve through an axle seat, and the No. 2 gear is meshed with the No. 1 gear on the same side. A synchronous wheel is fixedly connected to the axle of the No. 2 gear and the axle of the No. 1 gear located on the lower side, and the synchronous wheels on the upper and lower sides are connected by a synchronous belt transmission. After the axle of the No. 2 gear passes through the synchronous wheel, it is fixedly connected to the middle part of the No. 2 hand-tightened gear; a mounting plate is fixedly arranged on the outer end of the insertion rod, and a No. 2 electromagnet is fixedly arranged on the front side wall of the mounting plate, and the No. 2 electromagnet is connected to an external power supply; the outer side surfaces of the No. 1 electromagnet and the No. 2 electromagnet are arranged in the same plane.

[0006] Furthermore, a rubber gasket is fixedly provided on the inner side wall of the clamping arm; when the clamping arm is clamped on the upper and lower sides of the display screen, the rubber gasket makes the connection between the clamping arm and the display screen more secure, while reducing the damage of the clamping arm to the outer side wall of the display screen.

[0007] Furthermore, a screw is vertically fixed on the connecting plate between the telescopic rods, and an internal threaded tube is provided on one end of the screw through a threaded rotation sleeve, and the other end of the internal threaded tube is rotated through a side wall of the adjusting box through a bearing, and is extended to the outside of the adjusting box, and a No. 1 hand screw is fixedly connected to the extended end; when the No. 1 hand screw is turned, the No. 1 hand screw drives the internal threaded tube to rotate, and since the internal threaded tube is rotationally connected to the screw through a thread, the depth of the screw inserted into the internal threaded tube is adjusted, and then the length of the clamping arm extending out of the adjusting box is adjusted, so that it is convenient to clamp on the upper and lower sides of the display screen.

[0008] Furthermore, guide strips are symmetrically fixed on the front and rear side walls of the insertion rod, and guide grooves are correspondingly opened on the front and rear side walls of the internal slot of the sleeve, and the guide strips are movably inserted inside the guide grooves; the movement of the insertion rod inside the sleeve is guided and limited by the movement of the guide strips in the guide grooves.

[0009] Furthermore, a plurality of positioning holes are provided on the upper rounded corners of the front side wall of the No. 1 gear located on the upper side, an elastic steel bar is rotatably provided on the front side wall of the shaft seat of the No. 1 gear located on the upper side through a pin shaft, a positioning column is fixedly provided on the inner side surface of the elastic steel bar, and the positioning column is movably inserted in the corresponding positioning hole; when the length adjustment of the extended insertion rod is completed, the rotation of the No. 1 gear is restricted by the elastic steel bar and the positioning column.

[0010] The working principle of the present invention is as follows: when installing a multi-screen linkage display, first install the fixing plate on the wall through the connecting piece and the bolt, then adjust the size of the magnetic attraction mechanism according to the size of the display screen, rotate the No. 2 hand screw, and the No. 2 hand screw drives the No. 2 gear to rotate. Since the No. 1 gear located on the upper side is meshed with the No. 2 gear, and the No. 2 gear is connected to the No. 1 gear located on the lower side through the synchronous wheel and the synchronous belt transmission, the No. 1 gears on the upper and lower sides rotate in opposite directions. Since the inner end of the No. 1 gear is meshed with the rack on the plug rod, the plug rod extends from the inside of the sleeve, and the extension length is determined according to the size of the display screen; then adjust the spacing between the clamping arms on the upper and lower sides, clamp the display screen between the clamping arms on the upper and lower sides, and the reverse compression force of the compression spring tightly clamps the clamping arms on the upper and lower sides of the screen, and then connect the No. 1 electromagnet and the No. 2 electromagnet to the external power supply, and the magnetic force generated by the No. 1 electromagnet and the No. 2 electromagnet attracts the display screen to the fixed frame on the back, and the display screen is installed.

[0011] After adopting the above structure, the beneficial effects of the present invention are:

[0012] 1. The magnetic suction mechanism uses a retractable arm for support, which can adjust the size of the magnetic suction structure for screens of different sizes and has a wider range of applications;

[0013] 2. The display screen is installed through the No. 1 electromagnet, the No. 2 electromagnet and the clamping mechanism, which makes it convenient to disassemble, repair or replace the display screen, and the installation is easy and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 yes Figure 1 Left view of .

[0017] Figure 3 yes Figure 1 Enlarged view of part A in .

[0018] Figure 4 yes Figure 2 Enlarged view of part B in .

[0019] Description of reference numerals:

[0020] Fixed plate 1, connecting piece 2, No. 1 electromagnet 3, clamping mechanism 4, adjusting box 4-1, clamping arm 4-2, connecting plate 4-3, compression spring 4-4, telescopic rod 4-5, magnetic mechanism 5, sleeve 5-1, plug rod 5-2, rack 5-3, No. 1 gear 5-4, No. 2 gear 5-5, synchronous wheel 5-6, synchronous belt 5-7, No. 2 hand screw 5-8, mounting plate 5-9, No. 2 electromagnet 5-10, rubber gasket 6, screw 7, internal threaded tube 8, No. 1 hand screw 9, guide strip 10, guide groove 11, positioning hole 12, elastic steel strip 13, positioning column 14. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] See Figure 1-Figure 4As shown, the technical solution adopted in this specific embodiment is: it includes a fixing plate 1, a clamping mechanism 4 and a magnetic attraction mechanism 5; a connecting piece 2 is symmetrically fixedly welded on the left and right side walls of the fixing plate 1, and the fixing plate 1 is fixedly arranged on a wall or a display stand by the connecting piece 2 and bolts; a No. 1 electromagnet 3 is fixedly arranged on the front side surface of the fixing plate 1 by bolts, and the No. 1 electromagnet 3 is connected to an external power supply; the clamping mechanism 4 is symmetrically fixedly arranged on the upper and lower side surfaces of the fixing plate 1, and the magnetic attraction mechanism 5 is fixedly arranged on the left and right side surfaces of the fixing plate 1; the clamping mechanism 4 comprises an adjustment box 4-1, a clamping arm 4-2, a connecting plate 4-3, a compression spring 4-4 ​​and a telescopic rod 4-5; the adjustment box 4-1 is symmetrically fixedly welded on the upper and lower side surfaces of the fixing plate 1, the clamping arm 4-2 is symmetrically and movably inserted on the left and right sides of one side of the adjustment box 4-1, the clamping arm 4-2 is arranged in an "L" shape, the vertical end of the clamping arm 4-2 is inserted into the inside of the adjustment box 4-1, and the connecting plate 4-3 is fixedly welded between the inserted ends, the telescopic rod 4-5 is symmetrically and vertically fixedly welded on the left and right sides of one side of the connecting plate 4-3, and the telescopic rod 4-5 The structure and principle of the umbrella handle are the same as those in the prior art. The other end of the telescopic rod 4-5 is fixedly connected to the inner wall of the adjustment box 4-1. A compression spring 4-4 ​​is sleeved on the outer side of the telescopic rod 4-5. One end of the compression spring 4-4 ​​is set against the inner wall of the adjustment box 4-1, and the other end is set against the side wall of the connecting plate 4-3. A screw rod 7 is vertically fixedly welded on the connecting plate 4-3 between the telescopic rods 4-5. An internal threaded tube 8 is sleeved on one end of the screw 7 through a threaded rotation sleeve. The other end of the internal threaded tube 8 rotates through a bearing through After one side wall of the adjustment box 4-1, it is extended to the outside of the adjustment box 4-1, and a No. 1 hand screw 9 is fixedly connected to the extended end, the inner wall of the bearing is fixedly welded to the internal threaded tube 8, and the outer wall of the bearing is fixedly welded to the inner wall of the adjustment box 4-1; a rubber gasket 6 is fixedly provided on the inner wall of the clamping arm 4-2 by means of sealant gluing; when the clamping arm 4-2 is clamped on the upper and lower sides of the display screen, the rubber gasket 6 makes the connection between the clamping arm 4-2 and the display screen more tightly, and at the same time, reduces the damage of the clamping arm 4-2 to the outer wall of the display screen;

[0023] The magnetic attraction mechanism 5 comprises a sleeve 5-1, a plug rod 5-2, a mounting plate 5-9, a No. 1 gear 5-4, a No. 2 gear 5-5, a No. 2 hand screw 5-8, a synchronous wheel 5-6 and a synchronous belt 5-7; two sleeves 5-1 are symmetrically fixedly welded on the left and right side walls of the fixed plate 1, and the other ends of the two sleeves 5-1 on the same side are inclined upward and downward respectively; the ends of the sleeves 5-1 are movably inserted with plug rods 5-2, and guide strips 10 are symmetrically fixedly welded on the front and rear side walls of the plug rod 5-2, and corresponding openings are provided on the front and rear side walls of the internal slot of the sleeve 5-1 There is a guide groove 11, and a guide bar 10 is movably inserted inside the guide groove 11; the movement of the insertion rod 5-2 inside the sleeve 5-1 is guided and limited by the movement of the guide bar 10 in the guide groove 11, and racks 5-3 are arranged on the opposite surfaces of the insertion rods 5-2 on the upper and lower sides, and the racks 5-3 and the insertion rod 5-2 are integrally formed, and a No. 1 gear 5-4 is rotatably arranged on the opposite surfaces of the sleeves 5-1 on the upper and lower sides through the shaft seat, and one side of the No. 1 gear 5-4 moves through the side wall of the sleeve 5-1 and is meshed with the rack 5-3 on the insertion rod 5-2; located at A second gear 5-5 is rotatably arranged on a sleeve 5-1 on one side of the No. 1 gear 5-4 on the upper side through an axle seat, and the No. 2 gear 5-5 is meshed with the No. 1 gear 5-4 on the same side. A synchronous wheel 5-6 is fixedly welded on the axle of the No. 2 gear 5-5 and the axle of the No. 1 gear 5-4 on the lower side, and the synchronous wheels 5-6 on the upper and lower sides are connected by a synchronous belt 5-7. After the axle of the No. 2 gear 5-5 passes through the synchronous wheel 5-6, it is fixedly welded to the middle part of the No. 2 hand-tightening 5-8; several equal fillets are provided on the front side wall of the No. 1 gear 5-4 on the upper side. A positioning hole 12 is provided, and an elastic steel bar 13 is rotatably arranged on the front side wall of the shaft seat of the No. 1 gear 5-4 on the upper side through a pin shaft, and a positioning column 14 is fixedly welded on the inner side surface of the elastic steel bar 13, and the positioning column 14 is movably inserted in the corresponding positioning hole 12; a mounting plate 5-9 is fixedly welded on the outer end of the insertion rod 5-2, and a No. 2 electromagnet 5-10 is fixedly arranged on the front side wall of the mounting plate 5-9 by bolts, and the No. 2 electromagnet 5-10 is connected to an external power supply; the outer side surfaces of the No. 1 electromagnet 3 and the No. 2 electromagnet 5-10 are arranged in the same plane.

[0024] The working principle of this specific implementation method is as follows: when installing a multi-screen linkage display, first install the fixing plate 1 on the wall through the connecting piece 2 and the bolts, then adjust the size of the magnetic attraction mechanism 5 according to the size of the display screen, rotate the No. 2 hand screw 5-8, and the No. 2 hand screw 5-8 drives the No. 2 gear 5-5 to rotate. Since the No. 1 gear 5-4 on the upper side is meshed with the No. 2 gear 5-5, and the No. 2 gear 5-5 is connected to the No. 1 gear 5-4 on the lower side through the synchronous wheel 5-6 and the synchronous belt 5-7, the No. 1 gears 5-4 on the upper and lower sides rotate in opposite directions. Since the inner end of the No. 1 gear 5-4 is meshed with the rack 5-3 on the insertion rod 5-2, the insertion rod 5-2 extends from the inside of the sleeve 5-1, and the length of the extension is determined by the size of the display screen; when the insertion rod 5-2 is extended When the length adjustment is completed, the rotation of the No. 1 gear 5-4 is limited by the elastic steel bar 13 and the positioning column 14; then; turn the No. 1 hand screw 9, the No. 1 hand screw 9 drives the internal threaded tube 8 to rotate, and since the internal threaded tube 8 is rotationally connected with the screw rod 7 through a thread, the depth of the screw rod 7 inserted in the internal threaded tube 8 is adjusted, and then the length of the clamping arm 4-2 extending out of the adjustment box 4-1 is adjusted, so that it is convenient to clamp on the upper and lower sides of the display screen. The reverse compression force of the compression spring 4-4 ​​tightly clamps the clamping arm 4-2 on the upper and lower sides of the screen, and then the No. 1 electromagnet 3 and the No. 2 electromagnet 5-10 are connected to the external power supply, and the magnetic force generated by the No. 1 electromagnet 3 and the No. 2 electromagnet 5-10 attracts the display screen to the fixed frame on the back, and the display screen is installed.

[0025] After adopting the above structure, the beneficial effects of this specific implementation are:

[0026] 1. The magnetic attraction mechanism 5 is supported by a retractable arm, which can adjust the size of the magnetic attraction structure according to screens of different sizes, and has a wider range of applications;

[0027] 2. The display screen is installed through the No. 1 electromagnet 3, the No. 2 electromagnets 5-10 and the clamping mechanism 4, which is convenient for disassembly, maintenance or replacement of the display screen, and the installation is convenient and quick;

[0028] 3. When the extension length of the plug rod 5-2 is adjusted, the rotation of the first gear 5-4 is restricted by the elastic steel bar 13 and the positioning column 14;

[0029] 4. The magnetic attraction mechanism 5 can adjust the extended length of the insertion rod 5-2 by rotating the second hand screw 5-8, and the adjustment method is simple.

[0030] The above description is only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A magnetic fixing structure for a multi-screen linkage display, characterized in that: It comprises a fixing plate (1), a clamping mechanism (4) and a magnetic attraction mechanism (5); connecting pieces (2) are symmetrically fixedly arranged on the left and right side walls of the fixing plate (1); a No. 1 electromagnet (3) is fixedly arranged on the front side of the fixing plate (1), and the No. 1 electromagnet (3) is connected to an external power supply; the clamping mechanism (4) is symmetrically fixedly arranged on the upper and lower side surfaces of the fixing plate (1), and the magnetic attraction mechanism (5) is fixedly arranged on the left and right side surfaces of the fixing plate (1); the clamping mechanism (4) comprises an adjustment box (4-1), a clamping arm (4-2), a connecting plate (4-3), a compression spring (4-4) and a telescopic rod (4-5); the adjustment box (4-1) is symmetrically fixedly arranged on the upper and lower side surfaces of the fixing plate (1), Clamping arms (4-2) are symmetrically and movably inserted on the left and right sides of one side of the regulating box (4-1); the clamping arms (4-2) are arranged in an "L" shape; the vertical ends of the clamping arms (4-2) are inserted into the inside of the regulating box (4-1); and a connecting plate (4-3) is fixedly connected between the inserted ends; telescopic rods (4-5) are symmetrically and vertically fixedly arranged on the left and right sides of one side of the connecting plate (4-3); the other end of the telescopic rod (4-5) is fixedly connected to the inner side wall of the regulating box (4-1); a compression spring (4-4) is sleeved on the outer side of the telescopic rod (4-5); one end of the compression spring (4-4) is arranged to abut against the inner side wall of the regulating box (4-1); and the other end of the compression spring (4-4) is arranged to abut against the side wall of the connecting plate (4-3); The magnetic attraction mechanism (5) comprises a sleeve (5-1), an insertion rod (5-2), a mounting plate (5-9), a first gear (5-4), a second gear (5-5), a second hand screw (5-8), a synchronous wheel (5-6) and a synchronous belt (5-7); two sleeves (5-1) are symmetrically fixedly arranged on the left and right side walls of the fixed plate (1), and the other ends of the two sleeves (5-1) on the same side are inclined upward and downward respectively; the ends of the sleeves (5-1) are movably inserted with insertion rods (5-2), and racks (5-3) are arranged on the opposite surfaces of the insertion rods (5-2) on the upper and lower sides; the opposite surfaces of the sleeves (5-1) on the upper and lower sides are rotatably provided with first gears (5-4) through shaft seats; one side of the first gear (5-4) movably passes through the side wall of the sleeve (5-1) and is meshed with the racks (5-3) on the insertion rods (5-2); the first gear located on the upper side A second gear (5-5) is rotatably arranged on a sleeve (5-1) on one side of (5-4) through an axle seat, and the second gear (5-5) is meshed with a first gear (5-4) on the same side. A synchronous wheel (5-6) is fixedly connected to the axle of the second gear (5-5) and the axle of the first gear (5-4) located at the lower side, and the synchronous wheels (5-6) on the upper and lower sides are connected by a synchronous belt (5-7). After the axle of the second gear (5-5) passes through the synchronous wheel (5-6), it is fixedly connected to the middle part of the second hand screw (5-8); a mounting plate (5-9) is fixedly arranged on the outer end of the plug rod (5-2), and a second electromagnet (5-10) is fixedly arranged on the front side wall of the mounting plate (5-9), and the second electromagnet (5-10) is connected to an external power supply; the outer side surfaces of the first electromagnet (3) and the second electromagnet (5-10) are arranged in the same plane; A screw rod (7) is vertically fixed on the connecting plate (4-3) between the telescopic rods (4-5); an internal threaded tube (8) is rotatably sleeved on one end of the screw rod (7) through a thread; the other end of the internal threaded tube (8) is rotated through a side wall of the adjustment box (4-1) through a bearing and then extended to the outside of the adjustment box (4-1); and a No. 1 hand screw (9) is fixedly connected to the extended end; the No. 1 hand screw (9) is rotated to drive the internal threaded tube (8) to rotate; since the internal threaded tube (8) is rotatably connected to the screw rod (7) through the thread, the depth of the screw rod (7) inserted into the internal threaded tube (8) is adjusted, and the length of the clamping arm (4-2) extending out of the adjustment box (4-1) is adjusted; A plurality of positioning holes (12) are provided on the upper rounded corner of the front side wall of the No. 1 gear (5-4) located on the upper side; an elastic steel bar (13) is rotatably arranged on the front side wall of the shaft seat of the No. 1 gear (5-4) located on the upper side through a pin shaft; a positioning column (14) is fixedly arranged on the inner side of the elastic steel bar (13); the positioning column (14) is movably inserted into the corresponding positioning hole (12); when the extension length of the insertion rod (5-2) is adjusted, the rotation of the No. 1 gear (5-4) is restricted by the elastic steel bar (13) and the positioning column (14).

2. The magnetic fixing structure of a multi-screen linkage display according to claim 1, characterized in that: A rubber gasket (6) is fixedly arranged on the inner side wall of the clamping arm (4-2); when the clamping arm (4-2) is clamped on the upper and lower sides of the display screen, the rubber gasket (6) makes the connection between the clamping arm (4-2) and the display screen more secure, while reducing damage to the outer side wall of the display screen caused by the clamping arm (4-2).

3. The magnetic fixing structure of a multi-screen linkage display according to claim 1, characterized in that: Guide strips (10) are symmetrically fixedly arranged on the front and rear side walls of the insertion rod (5-2), and guide grooves (11) are correspondingly opened on the front and rear side walls of the internal slot of the sleeve (5-1), and the guide strips (10) are movably inserted in the guide grooves (11); the movement of the insertion rod (5-2) in the sleeve (5-1) is guided and limited by the movement of the guide strips (10) in the guide grooves (11).

4. The magnetic fixing structure of a multi-screen linkage display according to claim 1, characterized in that: Its working principle: when installing a multi-screen linkage display, first install the fixing plate (1) on the wall through the connecting piece (2) and the bolts, then adjust the size of the magnetic attraction mechanism (5) according to the size of the display screen, rotate the No. 2 hand screw (5-8), and the No. 2 hand screw (5-8) drives the No. 2 gear (5-5) to rotate. Since the No. 1 gear (5-4) on the upper side is meshed with the No. 2 gear (5-5), and the No. 2 gear (5-5) and the No. 1 gear (5-4) on the lower side are connected through the synchronous wheel (5-6) and the synchronous belt (5-7), the No. 1 gears (5-4) on the upper and lower sides rotate in opposite directions. Since the inner end of the No. 1 gear (5-4) is connected to the insertion rod ( The rack (5-3) on the sleeve (5-2) is meshed with each other, and the rod (5-2) is extended from the inside of the sleeve (5-1), and the extension length is determined according to the size of the display screen; then the spacing between the clamping arms (4-2) on the upper and lower sides is adjusted, and the display screen is clamped between the clamping arms (4-2) on the upper and lower sides, and the reverse compression force of the compression spring (4-4) tightly clamps the clamping arms (4-2) on the upper and lower sides of the screen, and then the first electromagnet (3) and the second electromagnet (5-10) are connected to the external power supply, and the magnetic force generated by the first electromagnet (3) and the second electromagnet (5-10) attracts the display screen to the fixing frame at the back, and the display screen is installed.

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