CN114216030A

CN114216030A - Foldable double-column LED lifting screen

Info

Publication number: CN114216030A
Application number: CN202111577702.2A
Authority: CN
Inventors: 吕孔强; 谢富松
Original assignee: Shenzhen Huangjia Display Technology Co ltd
Current assignee: Shenzhen Huangjia Display Technology Co ltd
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2022-03-22

Abstract

The invention relates to a double-upright-column LED lifting screen, in particular to a foldable double-upright-column LED lifting screen. The invention aims to provide a foldable double-upright-column LED lifting screen which is convenient to transport and can be adjusted in height. The invention provides a foldable double-upright-column LED lifting screen which comprises a supporting shell, supporting rods, a first rotating shaft, a supporting cylinder, lifting columns and the like, wherein the supporting rods are symmetrically arranged on the front and back of the left side in the supporting shell, the first rotating shaft is hinged between the left parts of the supporting rods, the supporting cylinder is symmetrically arranged on the front and back of the first rotating shaft, and the lifting columns are arranged in the supporting cylinder in a sliding mode. According to the LED screen folding device, the LED screen can be folded by rotating the LED screen up and down, so that the transportation work of people is facilitated, and then the first screw rod can be driven to rotate forwards and backwards by rotating the turntable forwards and backwards, so that the lifting column and the LED screen can be driven to move up and down, the purpose of adjusting the height of the LED screen is achieved, and the LED screen folding device is convenient for people to use.

Description

Foldable double-column LED lifting screen

Technical Field

The invention relates to a double-upright-column LED lifting screen, in particular to a foldable double-upright-column LED lifting screen.

Background

The double-column LED display screen is a player which can be seen outdoors frequently, and is generally used for playing videos and advertisements which are made by people in advance so as to achieve the purpose of propaganda.

At present, current double-column LED display screen is generally including lift post and LED screen, be equipped with the LED screen between the top of two lift posts, people generally are direct to install the lift post in the assigned position, then can be through the video and the advertisement that the LED screen broadcast was made in advance, but current double-column LED display screen can not fold, thereby inconvenient people transports double-column LED display screen, and current double-column LED display screen height-fixing, can not carry out altitude mixture control according to people's needs, therefore, a convenient transportation and folding double-column LED lift screen that can height-adjusting have been designed.

Disclosure of Invention

In order to overcome the defects that the existing double-upright-column LED display screen is inconvenient to transport and cannot be adjusted in height according to the needs of people, the invention aims to provide the foldable double-upright-column LED lifting screen which is convenient to transport and can be adjusted in height.

The invention is realized by the following technical approaches: the utility model provides a folding double-column LED lift screen, including support housing, the bracing piece, first rotation axis, support the drum, the lift post, the LED screen, adjusting part, drive assembly and prevent moving back the subassembly, the inside left side front and back symmetry of support housing is equipped with the bracing piece, it has first rotation axis to articulate between the bracing piece left part, the symmetry is equipped with the support drum around on the first rotation axis, the inside equal slidingtype of support drum is equipped with the lift post, be equipped with the LED screen that is used for doing the propaganda between the lift capital portion, support housing's inside left side is equipped with the adjusting part who is used for adjusting LED screen height, be equipped with the drive assembly who is used for driving adjusting part work in the middle of support housing's the interior bottom, support housing's right side middle part is equipped with and is used for carrying on spacing preventing moving back the subassembly to drive assembly.

Further, the adjusting part is including supporting the shell, rotatory groove piece, drive gear, the cingulum, first supporting block, bevel gear and first lead screw, first rotation axis bottom is equipped with the support shell, the right side middle part rotary type of support shell is equipped with rotatory groove piece, the symmetry is equipped with first supporting block around the interior bottom of support shell, the equal rotary type in upper portion of first supporting block is equipped with the bull stick, the bull stick right side all is equipped with drive gear with rotatory groove piece left side, drive gear's quantity is three, the round trip has the cingulum between the three drive gear, the inside equal rotary type of support cylinder is equipped with first lead screw, first lead screw all is connected with adjacent lift post screw thread formula, first lead screw bottom all is equipped with bevel gear with the bull stick left side, two adjacent bevel gear intermeshing.

Further, the drive assembly is including the second supporting shoe, the second rotation axis, first axle sleeve, first sliding shaft, fixture block and first spring, all be equipped with the second supporting shoe in the middle of the left and right sides of bottom in the support shell, the rotary type is equipped with the second rotation axis between second supporting shoe upper portion, second rotation axis left side is equipped with first axle sleeve, the inside left side slidingtype of first axle sleeve is equipped with first sliding shaft, first sliding shaft left side is equipped with the fixture block, the fixture block blocks the rotation groove piece, be equipped with first spring between first sliding shaft right side and the first axle sleeve.

Further, prevent moving back the subassembly including the carousel, the second shaft cover, the second sliding shaft, the second spring, ring gear and kelly, second rotation axis right side is equipped with the second shaft cover, second shaft cover right side slidingtype is equipped with the second sliding shaft, the second sliding shaft slides and the rotation type is connected with support housing, the second sliding shaft right side is equipped with the carousel, be equipped with the second spring between second sliding shaft left side and the second shaft cover, the right side middle part of support housing inner wall is equipped with the ring gear, second sliding shaft left part is equipped with the kelly, the kelly blocks the ring gear.

Further, still including being used for the automatic LED screen that drives to carry out pivoted pulling subassembly, the pulling subassembly is including the second lead screw, the slide bar, the guide block, the pull rod, third spring and chute block, the outside of second rotation axis is equipped with the second lead screw, second lead screw right part screw thread formula is equipped with the slide bar, the symmetry is equipped with the guide block around the interior bottom left side of support housing, the quantity of guide block is four, it is equipped with the pull rod all to slide between two guide block upper portions of homonymy, the pull rod right part all is connected with the slide bar slidingtype, all be equipped with the third spring between the front and back both sides left part of slide bar and the adjacent pull rod, the symmetry is equipped with the chute block around on the first rotation axis, the chute block is located the support drum outside, chute block lower part all is connected with adjacent pull rod left part slidingtype.

Further, the foldable double-column LED lifting screen comprises a moving assembly used for moving the foldable double-column LED lifting screen, the moving assembly comprises a first guide rod, a sliding frame, wheels, a fourth spring, wedge-shaped rods, a second guide rod, push rods and a fifth spring, the first guide rods are symmetrically arranged on the front and back of the left side of the inner bottom of the supporting shell, the number of the first guide rods is four, the first guide rods are located on the left side of the guide block, the sliding frame is arranged between the upper portions of the four first guide rods in a sliding mode, the wheels are symmetrically and rotatably arranged on the front and back of the left side and the right side of the lower portion of the sliding frame, the fourth spring is wound on the upper portion of the first guide rod, two ends of the fourth spring are respectively connected with the first guide rods and the sliding frame, the wedge-shaped rods are symmetrically arranged on the front and back of the left side of the inner bottom of the supporting shell, the second guide rods are symmetrically arranged on the front and back of the left side of the inner bottom of the supporting shell, the second guide rods are four, the second guide bar is located the first guide bar inboard, and equal slidingtype is equipped with the push rod between two second guide bar right parts of homonymy, and the push rod all contacts with wedge pole bottom, and the push rod all contacts with adjacent pull rod, and the second guide bar right part has all around fifth spring, and the both ends of fifth spring are connected with second guide bar and push rod respectively.

Further, still including the spacing subassembly that is used for improving stability, spacing subassembly is including third supporting shoe, spacing and sixth spring, and the symmetry is equipped with the third supporting shoe around the interior bottom right side of support housing, and the equal slidingtype in third supporting shoe middle part is equipped with spacing, spacing all with support housing lower part sliding type connection, all be equipped with the sixth spring between spacing top and the adjacent third supporting shoe.

Furthermore, the bottom of the limiting frame is provided with an anti-skid pad.

Compared with the prior art, the invention has the remarkable improvements that:

1. according to the LED screen folding device, the LED screen can be folded by rotating the LED screen up and down, so that the transportation work of people is facilitated, and then the first screw rod can be driven to rotate forwards and backwards by rotating the turntable forwards and backwards, so that the lifting column and the LED screen can be driven to move up and down, the purpose of adjusting the height of the LED screen is achieved, and the LED screen folding device is convenient for people to use.

2. According to the LED screen folding device, the second screw rod can be driven to rotate forwards and backwards through the forward and backward rotating turntable, so that the pull rod is driven to move leftwards and rightwards, the pull rod can drive the first rotating shaft to rotate forwards and backwards through the sliding groove block, so that the folding work of the LED screen is automatically completed, and time and labor are saved.

3. The lifting screen can be moved more conveniently through the wheels, and when the pull rod moves leftwards, the wheels can be driven to move upwards to be separated from the ground, so that the lifting screen is prevented from moving randomly.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic perspective view of another embodiment of the present invention.

Fig. 3 is a schematic perspective view of the folded state of the present invention.

Fig. 4 is a schematic internal perspective view of the present invention.

Fig. 5 is a schematic internal perspective view of another aspect of the present invention.

Fig. 6 is a partial perspective view of the present invention.

Fig. 7 is a perspective view of the adjustment assembly of the present invention.

FIG. 8 is a cross-sectional view of an adjustment assembly of the present invention.

Fig. 9 is a schematic perspective view of the driving assembly of the present invention.

Fig. 10 is a cross-sectional view of the drive assembly of the present invention.

Fig. 11 is a schematic perspective view of the anti-back assembly of the present invention.

Fig. 12 is a schematic perspective view of a portion of the anti-back assembly of the present invention.

FIG. 13 is a perspective view of the pulling assembly of the present invention.

FIG. 14 is a schematic drawing showing a partial perspective view of the pulling assembly of the present invention.

Fig. 15 is a schematic perspective view of the moving assembly of the present invention.

Fig. 16 is a perspective view of another view of the moving assembly of the present invention.

Fig. 17 is a partial perspective view of the moving assembly of the present invention.

Fig. 18 is a schematic perspective view of the spacing assembly of the present invention.

Figure 19 is a cross-sectional view of a stop assembly of the present invention.

Part names and serial numbers in the figure: 1_ support housing, 2_ support rod, 3_ first rotation shaft, 4_ support cylinder, 5_ lifting column, 6_ LED screen, 7_ adjustment assembly, 701_ support housing, 702_ rotation groove block, 703_ drive gear, 704_ toothed belt, 705_ first support block, 706_ bevel gear, 707_ first lead screw, 8_ drive assembly, 801_ second support block, 802_ second rotation shaft, 803_ first bushing, 804_ first sliding shaft, 805_ clamping block, 806_ first spring, 9_ anti-back assembly, 901_ rotary disc, 902_ second bushing, 903_ second sliding shaft, 904_ second spring, 905_ toothed ring, 906_ clamping rod, 10_ pulling assembly, 1001_ second lead screw, 1002_ sliding rod, 1003_ guide block, 1004_ pulling rod, 1005_ third spring, 1101_ sliding groove block, 11_ moving assembly, 11_ first guide rod, wheel _ sliding frame, 1103_ sliding frame, 1104_ fourth spring, 1105_ wedge bar, 1106_ second guide bar, 1107_ push bar, 1108_ fifth spring, 12_ limit component, 1201_ third support block, 1202_ limit frame, 1203_ sixth spring.

Detailed Description

The invention is further explained by combining the drawings in the specification and the embodiments of the invention are given by combining the drawings in the specification.

Example 1

The utility model provides a folding double-column LED lift screen, refer to fig. 1-12, including supporting shell 1, bracing piece 2, first rotation axis 3, support drum 4, lift post 5, LED screen 6, adjusting part 7, drive assembly 8 with prevent moving back subassembly 9, the inside left side front and back symmetrical welding of supporting shell 1 has bracing piece 2, it has first rotation axis 3 to articulate between 2 left parts of bracing piece, symmetrical welding has support drum 4 around on the first rotation axis 3, support drum 4 inside all slidingtype is equipped with lift post 5, be equipped with LED screen 6 between lift post 5 top, people can utilize LED screen 6 broadcast video to reach the purpose of propaganda, the inside left side of supporting shell 1 is equipped with adjusting part 7, be equipped with drive assembly 8 in the middle of the interior bottom of supporting shell 1, the right side middle part of supporting shell 1 is equipped with prevents moving back subassembly 9.

Referring to fig. 4, 5, 7 and 8, the adjusting assembly 7 includes a supporting housing 701, a rotating groove block 702, a driving gear 703, a toothed belt 704, a first supporting block 705, a bevel gear 706 and a first screw rod 707, the supporting housing 701 is disposed at the bottom of the first rotating shaft 3, the rotating groove block 702 is rotatably disposed at the middle of the right side of the supporting housing 701, the first supporting block 705 is symmetrically welded at the front and back of the inner bottom of the supporting housing 701, a rotating rod is rotatably disposed at the upper portion of the first supporting block 705, the driving gear 703 is disposed at both the right side of the rotating rod and the left side of the rotating groove block 702, the number of the driving gears 703 is three, the toothed belt 704 is connected between the three driving gears 703 in a winding manner, the first screw rod 707 is rotatably disposed inside the supporting cylinder 4, the first screw rod 707 is connected with the adjacent lifting column 5 in a threaded manner, the first screw rod 707 rotates positively and reversely, so as to drive the lifting column 5 and the LED screen 6 to move up and down, thereby achieving the purpose of adjusting the height of the LED screen 6, bevel gears 706 are arranged at the bottom of the first screw rod 707 and on the left side of the rotating rod, and two adjacent bevel gears 706 are meshed with each other.

Referring to fig. 5, 9 and 10, the driving assembly 8 includes a second supporting block 801, a second rotating shaft 802, a first bushing 803, a first sliding shaft 804, a locking block 805 and a first spring 806, the second supporting block 801 is welded in the middle of the left and right sides of the bottom in the supporting housing 1, the second rotating shaft 802 is rotatably arranged between the upper portions of the second supporting blocks 801, the first bushing 803 is arranged on the left side of the second rotating shaft 802, the first sliding shaft 804 is slidably arranged on the left side inside the first bushing 803, the locking block 805 is welded on the left side of the first sliding shaft 804, the locking block 805 locks the rotating groove block 702, the second rotating shaft 802 rotates in the forward and backward directions, and the locking block 805 and the rotating groove block 702 can be driven to rotate in the forward and backward directions, so as to drive the first screw rod 707 to rotate in the forward and backward directions, and the first spring 806 is arranged between the right side of the first sliding shaft 804 and the first bushing 803.

Referring to fig. 2, 3, 4, 5, 11 and 12, the anti-back assembly 9 includes a rotating plate 901, a second shaft sleeve 902, a second sliding shaft 903, a second spring 904, a gear ring 905 and a clamping rod 906, the second shaft sleeve 902 is welded on the right side of the second rotating shaft 802, the second sliding shaft 903 is slidably arranged on the right side of the second shaft sleeve 902, the second sliding shaft 903 is slidably and rotatably connected with the support housing 1, the rotating plate 901 is arranged on the right side of the second sliding shaft 903, the second spring 904 is arranged between the left side of the second sliding shaft 903 and the second shaft sleeve 902, the gear ring 905 is welded in the middle of the right side of the inner wall of the support housing 1, the clamping rod 906 is arranged on the left portion of the second sliding shaft 903, and the clamping rod 906 clamps the gear ring 905, so as to limit the second rotating shaft 802.

When people need to use the foldable double-upright LED lifting screen, firstly, the foldable double-upright LED lifting screen is placed at a designated position, then the LED screen 6 is rotated 90 degrees upwards, the LED screen 6 drives the lifting column 5 and the supporting cylinder 4 to rotate 90 degrees upwards, so as to drive the first rotating shaft 3 to rotate 90 degrees anticlockwise, the first rotating shaft 3 drives the supporting shell 701 and the rotating groove block 702 to rotate 90 degrees anticlockwise, when the rotating groove block 702 is contacted with the clamping block 805, the clamping block 805 is extruded to move rightwards, the first spring 806 is compressed, when the rotating groove block 702 is aligned with the clamping block 805, the first spring 806 is restored, the clamping block 805 is driven to move leftwards to restore, so that the clamping block 805 clamps the rotating groove block 702, then the rotating disc 901 is pushed leftwards, the rotating disc 901 drives the second sliding shaft 903 and the clamping rod 906 to move leftwards, the second spring 904 is compressed, so that the clamping rod 906 is separated from the toothed ring 905, at this moment, the rotating disc 901 can be rotated, the turntable 901 drives the second sliding shaft 903 to rotate, so as to drive the second shaft sleeve 902 and the second rotating shaft 802 to rotate, the second rotating shaft 802 drives the first shaft sleeve 803, the first sliding shaft 804 and the fixture block 805 to rotate, the fixture block 805 drives the rotating groove block 702 to rotate, if the rotating groove block 702 is not aligned with the fixture block 805 at the beginning, the first spring 806 cannot restore, when the fixture block 805 rotates to be aligned with the rotating groove block 702, the first spring 806 restores to the original state, drives the fixture block 805 to move leftwards to restore and clamp the rotating groove block 702, so as to drive the rotating groove block 702 to rotate, the rotating groove block 702 can drive the rotating rod to rotate through the driving gear 703 and the toothed belt 704, the rotating rod drives the first screw rod 707 to rotate through the bevel gear 706, the first screw rod 707 drives the lifting column 5 to move upwards, the lifting column 5 drives the LED screen 6 to move upwards, when the LED screen 6 moves to a proper height, the turntable 901 is loosened, the second spring 904 is restored to the original state, and drives the rotating disc 901, the second sliding shaft 903 and the clamping rod 906 to move rightwards and reset, so that the clamping rod 906 clamps the toothed ring 905, at the moment, the second rotating shaft 802 cannot rotate, and the LED screen 6 can be prevented from moving downwards and resetting under the action of gravity, at the moment, people can play a video which is prepared in advance by using the LED screen 6, and the purpose of propaganda is achieved, when people do not need to use the foldable double-upright LED lifting screen, the rotating disc 901 is pushed leftwards again, the rotating disc 901 drives the second sliding shaft 903 and the clamping rod 906 to move leftwards, the second spring 904 is compressed, so that the clamping rod 906 is separated from the toothed ring 905, then the rotating disc 901 is rotated reversely, the second rotating shaft 802 can be driven to rotate reversely, so as to drive the first screw rod 707 to rotate reversely, the first screw 707 drives the lifting column 5 to move downwards, the lifting column 5 drives the LED screen 6 to move downwards and reset, when the LED screen 6 moves to the lowest part, the rotating disc 901 is loosened, the second spring 904 restores to the original state, the rotating disc 901, the second sliding shaft 903 and the clamping rod 906 are driven to move rightwards and reset, the clamping rod 906 clamps the toothed ring 905, then the LED screen 6 is rotated downwards for 90 degrees and reset, the LED screen 6 drives the lifting column 5 and the supporting cylinder 4 to rotate downwards for 90 degrees and reset, the first rotating shaft 3 is driven to rotate clockwise for 90 degrees and reset, the first rotating shaft 3 drives the supporting shell 701 and the rotating groove block 702 to rotate clockwise for 90 degrees and reset, the rotating groove block 702 can extrude the clamping block 805 to move rightwards, the first spring 806 is compressed, when the rotating groove block 702 is separated from the clamping block 805, the first spring 806 restores to the original state, the clamping block 805 is driven to move leftwards and reset, and finally, the foldable double-column LED lifting screen is taken away manually.

Example 2

On the basis of the embodiment 1, referring to fig. 4, 5, 13 and 14, the device further comprises a pulling assembly 10, the pulling assembly 10 comprises a second lead screw 1001, a slide rod 1002, guide blocks 1003, pull rods 1004, a third spring 1005 and a sliding groove block 1006, the second lead screw 1001 is arranged on the outer side of a second rotating shaft 802, the slide rod 1002 is arranged on the right portion of the second lead screw 1001 in a threaded manner, the guide blocks 1003 are symmetrically welded on the front and back of the left side of the inner bottom of the supporting shell 1, the number of the guide blocks 1003 is four, the pull rods 1004 are slidably arranged between the upper portions of the two guide blocks 1003 on the same side, the right portion of each pull rod 1004 is slidably connected with the slide rod 1002, the third spring 1005 is arranged between the left portions on the front and back sides of the slide rod 1002 and the adjacent pull rod 1004, the sliding groove blocks 1006 are symmetrically arranged on the front and back of the first rotating shaft 3, the sliding groove blocks 1006 are positioned on the outer side of the supporting cylinder 4, the lower portions 1006 of the sliding groove blocks are slidably connected with the left portions of the adjacent pull rods 1004, the pull rod 1004 moves left and right, and the first rotating shaft 3 can be driven to rotate forwards and backwards through the sliding groove block 1006, so that the LED screen 6 is driven to rotate, and the folding work of the LED screen 6 is completed.

Initially, the sliding rod 1002 is located at the left portion of the second lead screw 1001, when a person rotates the rotary plate 901, the sliding rod can drive the second rotating shaft 802 to rotate, so as to drive the second lead screw 1001 to rotate, the second lead screw 1001 drives the sliding rod 1002 to move to the right, the sliding rod 1002 drives the pull rod 1004 and the third spring 1005 to move to the right, the pull rod 1004 drives the chute block 1006 to rotate 90 degrees counterclockwise, so as to drive the first rotating shaft 3 to rotate 90 degrees counterclockwise, so as to drive the LED screen 6 to rotate 90 degrees upward, so that the fixture 805 blocks the rotating chute block 702, at this time, the pull rod 1004 cannot move to the right any more, the sliding rod 1002 continues to move to the right, the third spring 1005 compresses, at this time, the LED screen 6 moves upward, when the LED screen 6 moves to the top, the rotary plate 901 is loosened, when the person rotates the rotary plate 901 in the opposite direction, the second rotating shaft 802 can be driven to rotate in the opposite direction, so as to drive the second lead screw 1001 to rotate in the opposite direction, so as to drive the LED screen 6 to move downward to reset, meanwhile, the second lead screw 1001 drives the slide bar 1002 to move leftwards to reset, the third spring 1005 returns slowly, when the LED screen 6 moves to the lowest position, the third spring 1005 just completes returning, the slide bar 1002 continues to move leftwards to reset at this time, the slide bar 1002 drives the pull rod 1004 and the third spring 1005 to move leftwards to reset, the pull rod 1004 drives the chute block 1006 to rotate clockwise by 90 degrees to reset, thereby driving the first rotating shaft 3 to rotate clockwise by 90 degrees to reset, and then can drive the LED screen 6 to rotate downwards by 90 degrees to reset, so that the fixture block 805 is separated from the rotating chute block 702, and finally the turntable 901 is loosened.

Referring to fig. 3, 4, 5, 15, 16 and 17, the mobile assembly 11 further comprises a first guide bar 1101, a sliding frame 1102, wheels 1103, a fourth spring 1104, wedge bars 1105, a second guide bar 1106, a push bar 1107 and a fifth spring 1108, the first guide bar 1101 is symmetrically arranged at the left side of the inner bottom of the support housing 1, the number of the first guide bars 1101 is four, the first guide bar 1101 is positioned at the left side of the guide block 1003, the sliding frame 1102 is slidably arranged between the upper portions of the four first guide bars 1101, the wheels 1103 are symmetrically and rotatably arranged at the left and right sides of the lower portion of the sliding frame 1102 in a front-back symmetrical manner, when the wheels 1103 move downwards, the wheels 1103 can contact with the ground to facilitate the movement of the elevator screen, the fourth spring 1102 is wound on the upper portion of the first guide bar 1101, both ends of the fourth spring 1104 are respectively connected with the first guide bar 1101 and the sliding frame 1102, the wedge bars 1105 are symmetrically arranged at the left side of the sliding frame 1105 in a front-back manner, the quantity of wedge post 1105 is four, the symmetrical welding has second guide bar 1106 around the interior bottom left side of support housing 1, the quantity of second guide bar 1106 is four, second guide bar 1106 is located first guide bar 1101 inboard, all slidingtype push rod 1107 that is equipped with between two second guide bar 1106 right parts of homonymy, push rod 1107 all contacts with wedge post 1105, push rod 1107 all contacts with adjacent pull rod 1004, second guide bar 1106 right part has all around fifth spring 1108, the both ends of fifth spring 1108 are connected with second guide bar 1106 and push rod 1107 respectively.

Initially, the wheels 1103 are all in contact with the ground, the wheels 1103 can roll on the ground, it is more convenient for people to move the foldable double-column LED lifting screen, when the pull rod 1004 moves to the right, the push rod 1107 can be extruded to move to the right, the fifth spring 1108 is compressed, the push rod 1107 extrudes the wedge bar 1105 to move upwards, thereby driving the sliding frame 1102 and the wheels 1103 to move upwards, the fourth spring 1104 is compressed, at this time, the whole foldable double-column LED lifting screen can move downwards, so that the supporting shell 1 is in contact with the ground, the wheels 1103 are all separated from the ground, thereby preventing the foldable double-column LED lifting screen from moving randomly, when the pull rod 1004 moves to the left and resets, the pull rod 1004 can be separated from the push rod 1107, the fifth spring 1108 restores to the original state, the push rod 1107 moves to the left and resets, when the push rod 1107 is separated from the wedge bar 1105, the fourth spring 1104 restores to the original state, thereby driving the wedge bar 1105, Carriage 1102 and wheel 1103 move down and reset for wheel 1103 contacts with ground again, and this moment this folding double-column LED lifting screen is whole can up-motion, makes support housing 1 and ground separation, makes things convenient for people to remove this folding double-column LED lifting screen once more.

Referring to fig. 4, 5, 15, 18 and 19, the elevating screen further comprises a limiting assembly 12, the limiting assembly 12 includes a third supporting block 1201, a limiting frame 1202 and a sixth spring 1203, the third supporting block 1201 is symmetrically arranged on the front and back of the right side of the inner bottom of the supporting shell 1, the limiting frame 1202 is arranged in the middle of the third supporting block 1201 in a sliding manner, the limiting frame 1202 is connected with the lower portion of the supporting shell 1 in a sliding manner, a non-slip mat is arranged at the bottom of the limiting frame 1202, when the limiting frame 1202 moves downward, the non-slip mat is driven to move downward to contact with the ground, the stability of the elevating screen is improved, and the sixth spring 1203 is arranged between the top of the limiting frame 1202 and the adjacent third supporting block 1201.

When wheel 1103 all separates with ground, this folding double-column LED lift screen is whole can down-moving, make spacing 1202 down-moving, drive slipmat down-moving and ground contact, and ground can extrude spacing 1202 up-moving, sixth spring 1203 compression, under the effect of frictional force, this folding double-column LED lift screen of stability that can be further, when wheel 1103 all contacts with ground, this folding double-column LED lift screen is whole can up-moving, sixth spring 1203 can slow reconversion, after the complete reconversion of sixth spring 1203, spacing 1202 can drive slipmat up-moving and ground separation.

Finally, it is necessary to state that: the above-mentioned contents are only used to help understanding the technical solution of the present invention, and should not be interpreted as limiting the scope of the present invention; insubstantial modifications and adaptations of the invention as described above will occur to those skilled in the art and are intended to be within the scope of the invention as claimed.

Claims

1. A foldable double-column LED lifting screen comprises a supporting shell (1), supporting rods (2), a first rotating shaft (3), a supporting cylinder (4), lifting columns (5) and an LED screen (6), wherein the supporting rods (2) are symmetrically arranged on the front and back of the left side in the supporting shell (1), the first rotating shaft (3) is hinged between the left parts of the supporting rods (2), the supporting cylinder (4) is symmetrically arranged on the front and back of the first rotating shaft (3), the lifting columns (5) are arranged in the supporting cylinder (4) in an all-sliding manner, the LED screen (6) for propaganda is arranged between the tops of the lifting columns (5), the foldable double-column LED lifting screen is characterized by further comprising an adjusting component (7), a driving component (8) and a retreat-preventing component (9), the adjusting component (7) for adjusting the height of the LED screen (6) is arranged on the left side in the supporting shell (1), and the driving component (8) for driving the adjusting component (7) to work is arranged in the middle of the inner bottom part of the supporting shell (1), the middle part of the right side of the supporting shell (1) is provided with an anti-retreat component (9) used for limiting the driving component (8).

2. The foldable double-column LED lifting screen according to claim 1, wherein the adjusting assembly (7) comprises a support shell (701), a rotating groove block (702), a driving gear (703), a toothed belt (704), a first support block (705), a bevel gear (706) and a first screw rod (707), the support shell (701) is arranged at the bottom of the first rotating shaft (3), the rotating groove block (702) is rotatably arranged at the middle of the right side of the support shell (701), the first support block (705) is symmetrically arranged at the front and back of the inner bottom of the support shell (701), a rotating rod is rotatably arranged at the upper part of the first support block (705), the driving gears (703) are respectively arranged at the right side of the rotating rod and the left side of the rotating groove block (702), the number of the driving gears (703) is three, the toothed belt (704) is wound between the three driving gears (703), the first screw rod (707) is rotatably arranged in the support cylinder (4), the first screw rods (707) are in threaded connection with the adjacent lifting columns (5), bevel gears (706) are arranged at the bottoms of the first screw rods (707) and on the left side of the rotating rod, and the two adjacent bevel gears (706) are meshed with each other.

3. The foldable double-column LED lifting screen according to claim 2, wherein the driving assembly (8) comprises a second supporting block (801), a second rotating shaft (802), a first shaft sleeve (803), a first sliding shaft (804), a clamping block (805) and a first spring (806), the second supporting block (801) is arranged in the middle of the left side and the right side of the bottom in the supporting shell (1), the second rotating shaft (802) is rotatably arranged between the upper parts of the second supporting block (801), the first shaft sleeve (803) is arranged on the left side of the second rotating shaft (802), the first sliding shaft (804) is slidably arranged on the left side of the inside of the first shaft sleeve (803), the clamping block (805) is arranged on the left side of the first sliding shaft (804), the rotating groove block (702) is clamped by the clamping block (805), and the first spring (806) is arranged between the right side of the first sliding shaft (804) and the first shaft sleeve (803).

4. The foldable double-column LED lifting screen according to claim 3, wherein the anti-moving assembly (9) comprises a rotary table (901), a second shaft sleeve (902), a second sliding shaft (903), a second spring (904), a toothed ring (905) and a clamping rod (906), the second shaft sleeve (902) is arranged on the right side of the second rotating shaft (802), the second sliding shaft (903) is arranged on the right side of the second shaft sleeve (902) in a sliding manner, the second sliding shaft (903) is connected with the supporting shell (1) in a sliding and rotating manner, the rotary table (901) is arranged on the right side of the second sliding shaft (903), the second spring (904) is arranged between the left side of the second sliding shaft (903) and the second shaft sleeve (902), the toothed ring (905) is arranged in the middle of the right side of the inner wall of the supporting shell (1), the clamping rod (906) is arranged at the left part of the second sliding shaft (903), and the clamping rod (906) clamps the toothed ring (905).

5. The foldable double-column LED lifting screen according to claim 4, further comprising a pulling assembly (10) for automatically driving the LED screen (6) to rotate, wherein the pulling assembly (10) comprises a second lead screw (1001), a slide rod (1002), guide blocks (1003), a pull rod (1004), a third spring (1005) and a sliding groove block (1006), the second lead screw (1001) is arranged outside the second rotating shaft (802), the slide rod (1002) is arranged at the right part of the second lead screw (1001), the guide blocks (1003) are symmetrically arranged at the front and back of the left side of the inner bottom of the supporting shell (1), the number of the guide blocks (1003) is four, the pull rod (1004) is arranged between the upper parts of the two guide blocks (1003) at the same side in a sliding manner, the right part of the pull rod (1004) is connected with the slide rod (1002) in a sliding manner, the third spring (1005) is arranged between the left parts of the front and back sides of the slide rod (1002) and the adjacent pull rod (1004), the first rotating shaft (3) is symmetrically provided with sliding groove blocks (1006) in the front and back direction, the sliding groove blocks (1006) are positioned on the outer side of the supporting cylinder (4), and the lower parts of the sliding groove blocks (1006) are connected with the left parts of the adjacent pull rods (1004) in a sliding mode.

6. The foldable double-column LED lifting screen according to claim 5, further comprising a moving assembly (11) for moving the foldable double-column LED lifting screen, wherein the moving assembly (11) comprises a first guide bar (1101), a sliding frame (1102), wheels (1103), a fourth spring (1104), wedge bars (1105), a second guide bar (1106), a push bar (1107) and a fifth spring (1108), the first guide bar (1101) is symmetrically arranged on the left side of the inner bottom of the supporting shell (1) in the front-back direction, the number of the first guide bar (1101) is four, the first guide bar (1101) is located on the left side of the guide block (1003), the sliding frame (1102) is slidably arranged between the upper portions of the four first guide bars (1101), the wheels (1103) are symmetrically arranged on the left side and the right side of the lower portion of the sliding frame (1102) in the front-back direction, the fourth spring (1104) is wound on the upper portions of the first guide bar (1101), the both ends of fourth spring (1104) are connected with first guide bar (1101) and carriage (1102) respectively, the left side of carriage (1102) is preceding back symmetry and is equipped with wedge pole (1105), the quantity of wedge pole (1105) is four, the interior bottom left side of support housing (1) is preceding back symmetry and is equipped with second guide bar (1106), the quantity of second guide bar (1106) is four, second guide bar (1106) are located first guide bar (1101) inboard, all slidingtype is equipped with push rod (1107) between two second guide bar (1106) right parts of homonymy, push rod (1107) all contact with wedge pole (1105) bottom, push rod (1107) all contact with adjacent pull rod (1004), second guide bar (1106) right part all around having fifth spring (1108), the both ends of fifth spring (1108) are connected with second guide bar (1106) and push rod (1107) respectively.

7. The foldable double-column LED lifting screen according to claim 6, further comprising a limiting assembly (12) for improving stability, wherein the limiting assembly (12) comprises a third supporting block (1201), a limiting frame (1202) and a sixth spring (1203), the third supporting block (1201) is symmetrically arranged on the front and back of the right side of the inner bottom of the supporting shell (1), the limiting frame (1202) is arranged in the middle of the third supporting block (1201) in a sliding manner, the limiting frame (1202) is connected with the lower portion of the supporting shell (1) in a sliding manner, and the sixth spring (1203) is arranged between the top of the limiting frame (1202) and the adjacent third supporting block (1201).

8. The foldable double-column LED lifting screen according to claim 7, wherein the bottom of the limiting frame (1202) is provided with a non-slip pad.