CN114776947A

CN114776947A - LED display screen

Info

Publication number: CN114776947A
Application number: CN202210373648.8A
Authority: CN
Inventors: 潘海河; 张子路
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-04-06
Filing date: 2022-04-06
Publication date: 2022-07-22

Abstract

The invention relates to the field of display screens, in particular to an LED display screen, which comprises a screen box, a rear cover, a motor and a telescopic rod, wherein the rear cover is arranged on the screen box; the motor cooperation telescopic link is used, make when the maintenance is dismantled to needs, can will install in the screen case automatic lowering of eminence, need not climb to the eminence and dismantle the screen case, reduce the takedown time, the problem of the easy emergence accident of eminence operation has been solved, telescopic link cooperation head rod and arc use, when the screen case drops, mention the back lid, strike off the dust that the back was covered, and trigger the hemisphere fixture block and drive the kelly and rise, the screen is emptyd in the spring a promotion, can not appear damaging when the screen is emptyd in the rubber block protection, the screen case falls the back, directly overhaul the interior screen of empting, the time of lid after the dismantlement of saving, work efficiency has been promoted, when reseing, promote the interior screen get into the screen case in the kelly block card can, the operation is comparatively simple and convenient.

Description

LED display screen

Technical Field

The invention relates to the field of display screens, in particular to an LED display screen.

Background

The LED display screen is a flat panel display, is used for showing various information's such as characters, image, video recording signal equipment, and area ductility, and the LED display screen can extend wantonly to realize seamless concatenation, LED display screen life is longer, and possess high luminance, wider viewing angle and good color restorability, and the LED display screen is generally used for airport, market, hotel, high-speed railway, subway, cinema, exhibition, office building etc..

However, when the existing LED display screen is used in factories such as flour mills with more dust, the factories need to use the LED display screen to display the processing progress and time, but the height of the factory building is higher when the LED display screen is used, the display screen is usually fixedly installed on a ceiling, the installation, the disassembly and the maintenance at the higher position are troublesome, and the high-altitude operation is needed when the maintenance is disassembled, so that the potential safety hazard exists, the temperature of a dust factory is higher, the dust is more, the service life of the LED display screen can be influenced by high temperature and dust, and the dust is adhered to an electronic element in the LED display screen to easily damage the LED display screen.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides an LED display screen.

The technical scheme adopted by the invention for solving the technical problems is as follows: a LED display screen comprises a screen box, a rear cover, a motor and a telescopic rod, wherein the telescopic rod is arranged at the bottom of the motor, a circular plate is welded at the bottom of the telescopic rod and fixedly connected with the screen box through bolts, the rear cover is installed at the back of the screen box, three air inlets are formed in the side wall of one side of the screen box, three air outlets are formed in the side wall of the other side of the screen box, a first dustproof net is installed in the air outlets, four clamping columns are arranged on one side of the top of the screen box, two limiting plates are arranged on one side of the bottom of the screen box, the limiting plates are connected with the bottom of the rear cover, two L-shaped plates are welded at the top of the rear cover, two holes matched with the clamping columns are formed in the L-shaped plates, four strip-shaped plates are arranged on the side wall of the outer side of the rear cover, a first connecting rod is welded on the outer wall of the telescopic rod, an arc-shaped plate is arranged at the bottom of the first connecting rod, one end of the arc-shaped plate is attached to the rear cover, and an inner screen is installed in the screen box; the motor is used for providing the operating power of telescopic link, the telescopic link is used for driving the screen case decline and rises, it is used for admitting air to go into in the income wind gap, the air outlet is used for giving vent to anger, first dust screen is used for preventing that the dust from getting into the screen incasement from the air outlet, the card post clearing hole passes the L shaped plate and makes the back lid can not control and rock, the limiting plate is used for restricting the position of back lid, fixed back lid position, the head rod welds on the telescopic link outside body of rod, telescopic link during operation outside body of rod is fixed motionless, the head rod is used for connecting the position of arc and fixed arc, the arc is used for clearing up the dust and triggers back lid back of the body structure, the bar shaped plate is used for the arc to produce the shake to the screen case through the time, the inner screen is used for showing the broadcast.

Specifically, the air inlet comprises a second dust screen, springs b and a top post, grooves a are formed in two sides of the top of the air inlet, the springs b are mounted on the top and the bottom of each groove a, the four springs b are connected with the second dust screen, the top and the bottom of each groove a are respectively provided with the top post, one side of the top of the air inlet is connected with a fan, the top of the fan is connected with a fixing block, and the fixing block is fixed on the inner wall of one side of the screen box; spring b makes the second dust screen can rock from top to bottom, and the second dust screen is used for gaseous entering screen incasement to filter the dust, and the fore-set is used for striking the second dust screen when the second dust screen rocks, shakes off the dust on the second dust screen, and the fan is used for accelerating the circulation of air in the screen incasement, reaches the cooling effect.

Specifically, a hemispherical clamping block is arranged at the top of the rear cover, a first return spring is connected to one side of the hemispherical clamping block, a first telescopic groove is connected to one side of the first return spring, a clamping groove is formed in one side of the first telescopic groove, a cambered clamping block is clamped to one side of the clamping groove, a second return spring is installed on one side of the cambered clamping block, a second telescopic groove is connected to one side of the second return spring, a second sliding groove is formed in one side of the bottom of the second telescopic groove, a plurality of balls are arranged in the second sliding groove, a third connecting rod is connected to the second sliding groove in a sliding mode through the balls, one end of the third connecting rod is arranged in the second telescopic groove, a first rack is welded to the other end of the third connecting rod, a gear is meshed with the first rack, a second rack is meshed to one side of the gear, a clamping rod is welded to the second rack, the clamping rod is connected with the first sliding groove in a sliding mode, a plurality of balls are arranged in the first sliding groove, and a sleeve is sleeved outside the middle of the clamping rod, two third reset springs are arranged in the sleeve, the top of the sleeve is fixed at the middle end of the inner wall of the top of the screen box, and the bottom of the clamping rod is clamped in the groove in the top of the inner screen; the design of the semi-spherical surface of the semi-spherical fixture block leads the semi-spherical fixture block to enter the first telescopic groove when being extruded by force, the first reset spring is used for resetting the semi-spherical fixture block, the design of one surface of the cambered fixture block, the arc surface and the plane surface, the lid is not influenced when the lid resets after lid and screen case separation that can be better, second reset spring is used for the restoration of cambered surface fixture block, the second sliding tray is used for restricting the moving direction of third connecting rod, the ball is used for reducing the resistance that the third connecting rod removed in the second sliding tray, third connecting rod one end welded first rack is used for driving gear revolve, the gear is used for driving the second rack and removes, second rack belt moves the fixture bar and removes, first sliding tray is used for limiting the moving direction of fixture bar, the ball is used for reducing the resistance that the pull rod removed in first sliding tray, sleeve pipe cooperation third reset spring is used for the fixture bar to restore to the throne, the design of clamping bar bottom cambered surface is used for spacing convenient interior screen when and resets after falling down.

Specifically, a rotating shaft is arranged at the bottom of the side wall of one side of the inner screen, two ends of the rotating shaft are rotatably connected to two sides of the inner wall of the box body, a first fixing plate is arranged at the top of the side wall of one side of the inner screen, a spring a is fixedly connected to the inner wall of one side of the screen box, one end of the spring a is abutted against the first fixing plate, a second fixing plate is arranged at the bottom of the side wall of one side of the inner screen, a fixing ring is arranged at one side of the second fixing plate, a steel wire rope is tied on the fixing ring, one end of the steel wire rope is wound on a wire winding disc, a disc spring is arranged in the wire winding disc, a second connecting rod is arranged at one side of the wire winding disc, one end of the second connecting rod is fixed on the inner wall of one side of the screen box, and a rubber block is arranged on the side wall of one side of the top of the inner screen; the axis of rotation is used for fixed interior screen position and makes interior screen can rotate, and spring an is used for promoting interior screen through first fixed plate for interior screen is emptyd after the kelly rises, and wire rope is used for restricting the angle of dumping of interior screen, and interior screen is connected wire rope with solid fixed ring on the second fixed plate, and wire rope winds on the wire reel, and disc spring is used for reseing of wire rope, and the second connecting rod is used for the position of fixed wire reel, and the block rubber is used for protecting the interior screen and can not damage empting.

The invention has the beneficial effects that:

(1) the LED display screen is characterized in that the motor is matched with the telescopic rod for use, so that when the screen box is required to be disassembled and maintained, the screen box arranged at a high position can be automatically lowered without climbing to the high position for disassembling the screen box, the disassembling time is reduced, and the problem that accidents are easy to happen during high-position operation is solved, the clamping column is matched with the L-shaped plate for use, so that the rear cover cannot swing left and right during use, the cambered surface clamping block is matched with the clamping groove for use, the rear cover is prevented from swinging up and down, the problems that the traditional rear cover cannot be automatically disassembled due to bolt fixing and is slower to disassemble due to the matched use of the two limit structures are solved, the telescopic rod is matched with the first connecting rod and the arc-shaped plate for use, when the screen box is lowered, dust on the rear cover is scraped, the rear cover is lifted, the hemispherical clamping block is triggered to drive the clamping rod to lift, the spring a pushes the inner screen to topple, the rubber block can prevent the inner screen from being damaged when toppling, and the screen box is lowered, the direct interior screen to empting overhauls, and the time of lid after the dismantlement of saving has promoted work efficiency, when reseing, promote interior screen get into the screen case in the kelly block go into can, the operation is comparatively simple and convenient.

(2) According to the LED display screen, the first dustproof net and the second dustproof net are used, so that dust cannot enter the box body through the air inlet and the air outlet and is adhered to electronic elements in the screen box, the air circulation in the screen box is accelerated by using the fan, the temperature in the screen box is reduced, the display screen can work more stably, the service life of the display screen is prolonged, the dust adhered to the first dustproof net is blown off by the wind blown out by the fan, the first dustproof net is prevented from being blocked, the spring b is matched with the top column for use, so that the arc-shaped plate shakes when passing through the strip-shaped plate, the second dustproof net is driven to shake in the groove a through the spring to impact the top column, the dust adhered to the second dustproof net is shaken off, and the second dustproof net cannot be blocked due to too much adhered dust and cannot be cleaned.

Drawings

The invention is further illustrated by the following examples in conjunction with the drawings.

FIG. 1 is a schematic diagram of an overall front structure of an LED display screen according to the present invention;

FIG. 2 is a schematic view of an overall structure of the back of an LED display screen according to the present invention;

FIG. 3 is a front internal structure view of an LED display screen according to the present invention;

FIG. 4 is a side view of an LED display screen according to the present invention;

FIG. 5 is an enlarged view of a portion A of FIG. 3;

FIG. 6 is an enlarged view of a portion B of FIG. 4;

fig. 7 is a partially enlarged view of the point C shown in fig. 4.

In the figure: 1. screen box, 2, back lid, 3, motor, 4, telescopic link, 5, air inlet, 6, first connecting rod, 7, L-shaped plate, 8, clamping column, 9, air outlet, 10, strip-shaped plate, 11, arc-shaped plate, 12, limiting plate, 13, round plate, 14, first dust screen, 15, fan, 16, rotating shaft, 17, first fixing plate, 18, spring a, 19, second fixing plate, 20, wire reel, 21, second connecting rod, 22, inner screen, 23, disc spring, 24, fixing ring, 25, wire rope, 26, second dust screen, 27, spring b, 28, top column, 29, fixing block, 30, hemispherical clamping block, 31, first telescopic groove, 32, first return spring, 33, clamping groove, 34, cambered clamping block, 35, second return spring, 36, third connecting rod, 37, ball, 38, first rack, 39, gear, 40, clamping rod, 41, The first sliding groove 42, the sleeve 43, the third return spring 44, the second sliding groove 45, the second telescopic groove 46, the grooves a and 47, the rubber block 48 and the second rack.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in FIGS. 1-6, the LED display screen comprises a screen box 1, a rear cover 2, a motor 3 and a telescopic rod 4, wherein the telescopic rod 4 is arranged at the bottom of the motor 3, a circular plate 13 is welded at the bottom of the telescopic rod 4, the circular plate 13 is fixedly connected with the screen box 1 through bolts, the rear cover 2 is arranged at the back of the screen box 1, three air inlets 5 are arranged on the side wall of one side of the screen box 1, three air outlets 9 are arranged on the side wall of the other side of the screen box 1, a first dust screen 14 is arranged in the air outlets 9, four clamping columns 8 are arranged on one side of the top of the screen box 1, two limiting plates 12 are arranged on one side of the bottom of the screen box 1, the limiting plates 12 are connected with the bottom of the rear cover 2, two L-shaped plates 7 are welded at the top of the rear cover 2, two holes matched with the clamping columns 8 are arranged on the upper surface of the L-shaped plates 7, four strip-shaped plates 10 are arranged on the side wall of the outer side of the rear cover 2, and a first connecting rod 6 is welded on the outer wall of the telescopic rod 4, an arc-shaped plate 11 is arranged at the bottom of the first connecting rod 6, one end of the arc-shaped plate 11 is attached to the rear cover 2, and an inner screen 22 is arranged in the screen box 1; motor 3 is used for providing the operating power of telescopic link 4, telescopic link 4 is used for driving 1 decline of screen case and rises, it is used for admitting air to go into wind gap 5, air outlet 9 is used for giving vent to anger, first dust screen 14 is used for preventing the dust from getting into screen case 1 from

air outlet

9, 8 clearing holes of calorie post pass L shaped plate 7 make back lid 2 can not rock about can, limiting plate 12 is used for restricting the position of back lid 2, fixed back lid 2 positions, head rod 6 welds on the telescopic link 4 outside body of rod, telescopic link 4 during operation outside body of rod is fixed motionless, head rod 6 is used for connecting 11 and the position of fixed arc 11, arc 11 is used for clearing up the dust and triggers 2 back structures of back lid, bar 10 is used for arc 11 to produce the shake to screen case 1 when passing through, interior screen 22 is used for showing the broadcast.

Specifically, the air inlet 5 comprises a second dust screen 26, springs b27 and a top column 28, grooves a46 are formed in two sides of the top of the air inlet 5, springs b27 are mounted at the top and the bottom of each groove a46, four springs b27 are connected with the second dust screen 26, the top and the bottom of each groove a46 are provided with the top column 28, one side of the top of the air inlet 5 is connected with a fan 15, the top of the fan 15 is connected with a fixing block 29, and the fixing block 29 is fixed on the inner wall of one side of the screen box 1; spring b27 makes second dust screen 26 can rock from top to bottom, and second dust screen 26 is used for gaseous entering screen box 1 in to filter the dust, and fore-set 28 is used for striking second dust screen 26 when second dust screen 26 rocks, shakes off the dust on the second dust screen 26, and fan 15 is used for accelerating the circulation of air in the screen box 1, reaches the cooling effect.

Specifically, the top of the rear cover 2 is provided with a hemispherical clamping block 30, one side of the hemispherical clamping block 30 is connected with a first return spring 32, one side of the first return spring 32 is connected with a first telescopic groove 31, one side of the first telescopic groove 31 is provided with a clamping groove 33, one side of the clamping groove 33 is clamped with an arc-surface clamping block 34, one side of the arc-surface clamping block 34 is provided with a second return spring 35, one side of the second return spring 35 is connected with a second telescopic groove 45, one side of the bottom of the second telescopic groove 45 is provided with a second sliding groove 44, a plurality of balls 37 are arranged in the second sliding groove 44, the second sliding groove 44 is connected with a third connecting rod 36 in a sliding manner through the balls 37, one end of the third connecting rod 36 is arranged in the second telescopic groove 45, the other end of the third connecting rod 36 is welded with a first rack 38, the first rack 38 is engaged with a gear 39, one side of the gear 39 is engaged with a second rack 48, the second rack 48 is welded with a clamping rod 40, the clamping rod 40 is connected with a first sliding groove 41 in a sliding mode, a plurality of balls 37 are arranged in the first sliding groove 41, a sleeve 42 is sleeved on the outer side of the middle of the clamping rod 40, two third return springs 43 are arranged in the sleeve 42, the top of the sleeve 42 is fixed to the middle end of the inner wall of the top of the screen box 1, and the bottom of the clamping rod 40 is clamped in a groove in the top of the inner screen 22; the hemispherical surface of the hemispherical latch 30 is designed to enter the first telescopic groove 31 when being pressed by a force, the first return spring 32 is used for resetting the hemispherical latch 30, the design of one surface of the cambered latch 34, namely the cambered surface and the plane surface, can better fix the rear cover 2 and is not affected when the rear cover 2 is reset after being separated from the screen box 1, the second return spring 35 is used for resetting the cambered latch 34, the second sliding groove 44 is used for limiting the moving direction of the third connecting rod 36, the ball 37 is used for reducing the resistance of the third connecting rod 36 moving in the second sliding groove 44, the first rack 38 welded at one end of the third connecting rod 36 is used for driving the gear 39 to rotate, the gear 39 is used for driving the second rack 48 to move, the second rack 48 drives the latch 40 to move, the first sliding groove 41 is used for limiting the moving direction of the latch 40, the ball 37 is used for reducing the resistance of the pull rod 40 moving in the first sliding groove 41, the sleeve 42 is matched with the third return spring 43 and used for resetting the clamping rod 40, and the cambered surface at the bottom of the clamping rod 40 is designed to be used for limiting and simultaneously facilitating resetting of the inner screen 22 after falling down.

Specifically, a rotating shaft 16 is arranged at the bottom of the side wall of one side of the inner screen 22, two ends of the rotating shaft 16 are rotatably connected to two sides of the inner wall of the box body, a first fixing plate 17 is arranged at the top of the side wall of one side of the inner screen 22, a spring a18 is fixedly connected to the inner wall of one side of the screen box 1, one end of a spring a18 is abutted against the first fixing plate 17, a second fixing plate 19 is arranged at the bottom of the side wall of one side of the inner screen 22, a fixing ring 24 is arranged at one side of the second fixing plate 19, a steel wire rope 25 is tied on the fixing ring 24, one end of the steel wire rope 25 is wound on the wire spool 20, a disc spring 23 is arranged in the wire spool 20, a second connecting rod 21 is arranged at one side of the wire spool 20, one end of the second connecting rod 21 is fixed on the inner wall of one side of the screen box 1, and a rubber block 47 is arranged on the side wall of the top of one side of the inner screen 22; the rotating shaft 16 is used for fixing the position of the inner screen 22 and enabling the inner screen 22 to rotate, the spring a18 is used for pushing the inner screen 22 through the first fixing plate 17, enabling the inner screen 22 to topple after the clamping rod 40 is lifted, the steel wire rope 25 is used for limiting the toppling angle of the inner screen 22, the inner screen 22 is connected with the steel wire rope 25 through the fixing ring 24 on the second fixing plate 19, the steel wire rope 25 is wound on the wire reel 20, the disc spring 20 is used for resetting the steel wire rope 25, the second connecting rod 21 is used for fixing the position of the wire reel 20, and the rubber block 47 is used for protecting the inner screen 22 from being damaged when the inner screen 22 is toppled.

When the LED display screen is used, when the LED display screen operates, the inner screen 22 displays contents to be played, the fan 15 drives air to enter the screen box 1 from the air inlet 5, the air filters dust through the second dustproof net 26 to prevent the dust from entering the screen box 1 and adhering to electronic components on the back of the inner screen 22, the fan 15 drives the air to flow in the screen box 1, the fan 15 blows air to reduce the temperature in the screen box 1 and discharges the air from the air outlet 9, the first dustproof net 14 prevents the dust from entering the screen box 1 from the air outlet 9, when maintenance is needed, the motor 3 is started, the motor 3 drives the telescopic rod 4 to work, the telescopic rod 4 extends an inner rod body to move downwards, the telescopic rod 4 drives the screen box 1 to descend through the circular plate 13, the first connecting rod 6 is fixed when the screen box 1 descends, the strip-shaped plate 10 drives the screen box 1 to shake through the arc-shaped plate 11, the screen box 1 shakes to drive the second dustproof net 26 to shake through the spring b27 in the groove a46, when the second dust-proof net 26 shakes, the second dust-proof net 26 strikes the top pillar 28 to shake off dust on the second dust-proof net 26, and the second dust-proof net 26 is prevented from being blocked due to too much dust adhesion, and then when the hemispherical latch 30 passes through the arc-shaped plate 11, the hemispherical latch 30 presses the first return spring 32 into the first telescopic slot 31 under the force of the force, the hemispherical latch 30 drives the arc-shaped latch 34 to press the second return spring 35 to separate from the slot 33 and enter the second telescopic slot 45 under the force of the second return spring, at this time, the arc-shaped latch 34 no longer locks the rear cover 2, the arc-shaped latch 34 drives the third connecting rod 36 to move in the second sliding slot 44 through the ball 37, the third connecting rod 36 drives the gear 39 to rotate through the first rack 38, the gear 39 drives the latch rod 40 to move upwards through the second rack 48, the latch rod 40 moves in the first sliding slot 41 through the ball 37, the latch rod 40 moves to press the third return spring 43 in the sleeve 42, and the latch rod 40 can rotate after rising, the spring a18 pushes the first fixing plate 17, the first fixing plate 17 drives the inner screen 22 to tilt through the rotating shaft 16, the inner screen 22 tilts the rubber block 47 to abut against the rear cover 2, the rubber block 47 protects the inner screen 22 from tilting against the rear cover and being not damaged, the screen box 1 descends, the arc plate 11 lifts the rear cover 2 through the L-shaped plate 7, the rear cover 2 is separated from the screen box 1, the inner screen 22 continues to tilt after the rear cover 2 passes through the rubber block 47, the steel wire rope 25 is pulled through the fixing ring 24 on the second fixing plate 19 when the inner screen 22 tilts, the inner screen 22 stops tilting after the steel wire rope 25 on the wire reel 20 is pulled, the motor 3 is powered off after the inner screen 22 is lowered to the set height, the tilted inner screen 22 is overhauled at the moment, after the maintenance is completed, the inner screen 22 is pushed to enter the screen box 1 to be clamped into the clamping rod 40 at the fixed position, when the inner screen 22 is pushed, the disc spring 23 drives the wire reel 20 to wind tightly around the steel wire rope 25, the motor 3 is started to drive the screen box 1 to ascend, in 2 bottom extrusion cambered surface fixture blocks 34 of back lid got into the flexible groove 45 of second, the screen case 1 rises back top card post 8 and passes hole and the L shaped plate block on the L shaped plate 7, second reset spring 35 promotes cambered surface fixture block 34 and gets into draw-in groove 33, lid 2 behind the block, 2 bottoms of back lid fall on limiting plate 12, screen case 1 rises and drives back lid 2 and rises through bar shaped plate 10 and tremble once more, get back to behind the initial position motor 3 outage.

The foregoing shows and describes the general principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are intended to be within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. An LED display screen which characterized in that: comprises a screen box (1), a rear cover (2), a motor (3) and a telescopic rod (4), wherein the telescopic rod (4) is arranged at the bottom of the motor (3), a circular plate (13) is welded at the bottom of the telescopic rod (4), the circular plate (13) is fixedly connected with the screen box (1) through a bolt, the rear cover (2) is installed at the back of the screen box (1), three air inlets (5) are arranged on the side wall of one side of the screen box (1), three air outlets (9) are arranged on the side wall of the other side of the screen box (1), a first dust screen (14) is installed in the air outlets (9), four clamping columns (8) are arranged on one side of the top of the screen box (1), two limiting plates (12) are arranged on one side of the bottom of the screen box (1), the limiting plates (12) are connected with the bottom of the rear cover (2), two L-shaped plates (7) are welded at the top of the rear cover (2), two holes matched with the clamping columns (8) are arranged on the L-shaped plates (7), four strip-shaped plates (10) are arranged on the side wall of the outer side of the rear cover (2), a first connecting rod (6) is welded on the outer wall of the telescopic rod (4), an arc-shaped plate (11) is arranged at the bottom of the first connecting rod (6), one end of the arc-shaped plate (11) is attached to the rear cover (2), and an inner screen (22) is arranged in the screen box (1).

2. The LED display screen of claim 1, wherein: go into wind gap (5) including second dust screen (26), spring b (27), fore-set (28), go into wind gap (5) top both sides and be provided with recess a (46), spring b (27) are all installed with the bottom at recess a (46) top, second dust screen (26) are all connected in four spring b (27), fore-set (28) are all installed with the bottom at recess a (46) top, it is connected with fan (15) to go into wind gap (5) top one side, fan (15) top is connected with fixed block (29), fixed block (29) are fixed in on screen case (1) one side inner wall.

3. The LED display screen of claim 2, wherein: the top of the rear cover (2) is provided with a hemispherical fixture block (30), one side of the hemispherical fixture block (30) is connected with a first reset spring (32), one side of the first reset spring (32) is connected with a first telescopic groove (31), one side of the first telescopic groove (31) is provided with a clamping groove (33), one side of the clamping groove (33) is clamped with a cambered fixture block (34), one side of the cambered fixture block (34) is provided with a second reset spring (35), one side of the second reset spring (35) is connected with a second telescopic groove (45), one side of the bottom of the second telescopic groove (45) is provided with a second sliding groove (44), a plurality of balls (37) are arranged in the second sliding groove (44), the second sliding groove (44) is connected with a third connecting rod (36) in a sliding manner through the balls (37), one end of the third connecting rod (36) is arranged in the second telescopic groove (45), the other end of the third connecting rod (36) is welded with a first rack (38), first rack (38) meshing has gear (39), gear (39) one side meshing has second rack (48), second rack (48) welding has kelly (40), kelly (40) sliding connection has first sliding tray (41), set up a plurality of balls (37) in first sliding tray (41), kelly (40) middle part outside cover is equipped with sleeve pipe (42), be provided with two third reset spring (43) in sleeve pipe (42), sleeve pipe (42) top is fixed in screen case (1) top inner wall middle-end, kelly (40) bottom block is in inner screen (22) top recess.

4. The LED display screen of claim 3, wherein: inner screen (22) inner wall bottom is provided with axis of rotation (16), axis of rotation (16) both ends are rotated and are connected in box inner wall both sides, inner screen (22) one side lateral wall top is provided with first fixed plate (17), screen case (1) one side inner wall fixedly connected with spring a (18), spring a (18) one end is contradicted on first fixed plate (17), inner screen (22) one side lateral wall bottom is provided with second fixed plate (19), second fixed plate (19) one side is provided with solid fixed ring (24), gu be equipped with wire rope (25) on fixed ring (24), wire rope (25) one end is around locating on wire reel (20), be provided with disc spring (23) in wire reel (20), wire reel (20) one side is provided with second connecting rod (21), second connecting rod (21) one end is fixed in on screen case (1) one side inner wall, be provided with block of rubber (47) on inner screen (22) top one side lateral wall.