CN113339649A

CN113339649A - LED lamp box and LED display screen

Info

Publication number: CN113339649A
Application number: CN202110683877.5A
Authority: CN
Inventors: 乔振柏
Original assignee: Sichuan Sanchengruihe Intelligent Technology Co ltd
Current assignee: Sichuan Sanchengruihe Intelligent Technology Co ltd
Priority date: 2021-06-21
Filing date: 2021-06-21
Publication date: 2021-09-03

Abstract

The invention provides an LED lamp box and an LED display screen, and relates to the technical field of advertising display lamps, the LED lamp box comprises a lamp box support and a lamp box body, the lamp box support comprises a support seat and a base, a speed reducing motor is arranged at the bottom end of the base, an output shaft for outputting power is arranged at the top end of the speed reducing motor, a rotating part for transmission is arranged on the outer side of the output shaft, and the speed reducing motor drives the support seat to horizontally rotate along the top surface of the base through the rotating part; the lamp box body is positioned above the supporting seat, and an adjusting part is arranged between the supporting seat and the lamp box body. Through having set up the regulation mode of two kinds of differences, can adjust the inclination of lamp house body, also can carry out the horizontal rotation to the lamp house body, for common lamp house, attract attention more, the effect of show is better, possesses better propaganda effect, and the practicality is better.

Description

LED lamp box and LED display screen

Technical Field

The invention relates to the technical field of advertisement display lamps, in particular to an LED lamp box and an LED display screen.

Background

A Light Emitting Diode (LED) is a semiconductor electronic component capable of emitting light, and converting electrical energy into light energy for output. Because of its strong brightness and illuminance, and low power consumption, it is widely used in the fields of illumination and display, such as lamp boxes and display screens.

The existing LED lamp box is in a fixed state after being installed, is difficult to adjust for the second time, and can only be integrally moved when needing to be adjusted, so that the convenience is poor, and the display and propaganda effects are poor.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides an LED lamp box and an LED display screen.

The invention solves the technical problems through the following technical means: an LED lamp box comprises a lamp box support and a lamp box body, wherein the lamp box support comprises a support seat and a base, a speed reducing motor is arranged at the bottom end of the base, an output shaft for outputting power is arranged at the top end of the speed reducing motor, a rotating part for playing a role in transmission is arranged on the outer side of the output shaft, and the speed reducing motor drives the support seat to horizontally rotate along the top surface of the base through the rotating part;

the lamp box body is positioned above the supporting seat, an adjusting part is arranged between the supporting seat and the lamp box body, the adjusting part comprises a hinge rod fixed on the top surface of one side of the supporting seat, and the lamp box body is hinged with the top end of the hinge rod; the adjusting part also comprises a transmission assembly positioned above the output shaft, and a connecting part is arranged between the transmission assembly and the output shaft;

when the connecting part is in a connecting state, the output shaft transmits power to the bottom surface of the lamp box body through transmission of the adjusting part, and pushes the lamp box body to rotate around a hinge point at the top end of the hinge rod; when the connecting part is in a disconnected state, no transmission is transmitted between the output shaft and the adjusting part.

Furthermore, a motor groove used for accommodating the speed reduction motor is formed in the bottom surface of the base, at least part of the bottom end of the speed reduction motor extends out of the motor groove, supporting legs are fixedly connected to the bottom surface of the base, and the height of each supporting leg is larger than that of the part, extending out of the motor groove, of the speed reduction motor.

Furthermore, the bottom surface array distribution of supporting seat has the support slide bar, support slide bar bottom fixedly connected with limit slide block, the base has been offered for limit slide block's surface and has been the annular groove, annular groove and limit slide block looks adaptation.

Furthermore, the rotating part comprises a mounting bracket fixed on the outer side of the output shaft, an inner ring rack is fixed on the surface of the mounting bracket, a turntable is fixed on one inward side of the supporting slide rod, an outer ring rack is fixed on the surface of the turntable, a linkage assembly playing a transmission role is arranged between the inner ring rack and the outer ring rack, and the inner ring rack drives the outer ring rack to rotate through the linkage assembly.

Furthermore, the linkage assembly comprises a fixed column located on the top surface of the base, a gear connecting rod is arranged on the top end of the fixed column in a rotating mode in a penetrating mode, an outer ring gear and an inner ring gear are fixed to two ends of the gear connecting rod respectively, the outer ring gear is meshed with an outer ring rack, and the inner ring gear is meshed with an inner ring rack.

Furthermore, the adjusting part also comprises a transmission screw rod penetrating through the top end of the supporting seat, the outer side of the transmission screw rod is screwed with a screw rod threaded sleeve, and the top end of the screw rod threaded sleeve is fixedly provided with a lamp box connecting rod sliding along the bottom surface of the lamp box body to drive the lamp box body to rotate around the top end of the hinge rod; the lamp box connecting rod top be fixed with the ball, lamp box body begins to have the ball groove towards one side of ball, ball and ball groove looks adaptation.

Furthermore, the transmission assembly comprises first bevel gears fixed on the outer sides of two ends of the transmission screw rod, the bottom ends of the first bevel gears are meshed with second bevel gears, transmission connecting rods are fixed at the bottom ends of the second bevel gears, the outer sides of the bottom ends of the transmission connecting rods coaxially rotate to form first gears, the top ends of the output shafts coaxially rotate to form second gears, and the second gears are located between the two first gears and are meshed with the two first gears.

Furthermore, a connecting part is arranged between the output shaft and the second gear, the connecting part comprises an extension rod fixed on the bottom surface of the second gear, a connecting pipe is fixed at the bottom end of the extension rod, the output shaft is slidably arranged in the connecting pipe in a penetrating manner, dovetail blocks are distributed on the outer side of the output shaft in an array manner, and dovetail grooves are formed in the connecting pipe relative to the inner wall of each dovetail block; the outer side of the speed reducing motor is provided with a lifting component used for controlling the lifting of the output shaft, when the speed reducing motor is located at a low position, the dovetail block is separated from the dovetail groove, and when the speed reducing motor is located at a high position, the dovetail block is matched with the dovetail groove.

Further, the lifting part is including seting up in the inside lift groove of base, the interior top surface in lift groove rotates and is connected with the lifting screw rod, the outside screw thread of lifting screw rod closes soon the lifting thread bush, gear motor's the outside is fixed with fixed hoop, through connecting block fixed connection between fixed hoop and the lifting thread bush.

The invention also provides an LED display screen which comprises a display screen body, wherein the display screen body is detachably fixed on the lamp box body as claimed and moves synchronously with the display screen body.

The invention has the beneficial effects that:

according to the invention, two different adjusting modes are set, the inclination angle of the lamp box body can be adjusted, the lamp box body can also be horizontally rotated, and compared with a common lamp box, the lamp box has the advantages of attracting attention, having a better display effect, having a better propaganda effect and having better practicability.

Drawings

FIG. 1 is a schematic sectional view of an LED lamp box according to the present invention;

FIG. 2 is a cross-sectional structural schematic of a rotary member of the present invention;

FIG. 3 is an enlarged view of the structure at A in FIG. 1 according to the present invention;

FIG. 4 is an enlarged view of the structure at B in FIG. 1 according to the present invention;

FIG. 5 is an enlarged view of the structure at C in FIG. 1 according to the present invention;

FIG. 6 is an enlarged structural view of the structure at D in FIG. 1 according to the present invention;

fig. 7 is a cross-sectional structural view of the connecting member of the present invention.

In the figure: 10. a lamp box bracket; 11. a supporting seat; 111. supporting the sliding rod; 12. a base; 121. a motor slot; 122. a support leg; 123. an annular ring groove; 124. a limiting slide block; 20. a display screen body; 30. a lamp box body; 31. a ball groove; 40. an adjustment member; 41. a transmission screw rod; 42. a light box connecting rod; 421. a ball bearing; 43. a screw rod thread sleeve; 44. a transmission assembly; 441. a first bevel gear; 442. a second bevel gear; 443. a transmission connecting rod; 444. a first gear; 445. a second gear; 45. a hinged lever; 50. a rotating member; 51. a turntable; 52. an outer ring rack; 53. a linkage assembly; 531. fixing a column; 532. a gear connecting rod; 533. an outer ring gear; 534. an inner ring gear; 54. mounting a bracket; 55. an inner ring rack; 60. a lifting member; 61. a fixing hoop; 62. lifting the screw rod; 63. a lifting groove; 64. lifting the threaded sleeve; 65. connecting blocks; 70. a connecting member; 71. a connecting pipe; 72. a dovetail groove; 73. an extension rod; 81. a reduction motor; 82. an output shaft; 821. a dovetail block.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Example 1

Referring to fig. 1 and 4, an LED light box of the present embodiment includes a light box support 10 and a light box body 30, where the light box support 10 includes a support base 11 and a base 12; a speed reducing motor 81 is arranged at the bottom end of the base 12, an output shaft 82 for outputting power is arranged at the top end of the speed reducing motor 81, a rotating part 50 for transmission is arranged outside the output shaft 82, and the speed reducing motor 81 drives the supporting seat 11 to horizontally rotate along the top surface of the base 12 through the rotating part 50;

the lamp box body 30 is positioned above the supporting seat 11, the adjusting component 40 is arranged between the supporting seat 11 and the lamp box body 30, the adjusting component 40 comprises a hinge rod 45 fixed on the top surface of one side of the supporting seat 11, and the lamp box body 30 is hinged with the top end of the hinge rod 45; the adjusting member 40 further includes a transmission assembly 44 positioned above the output shaft 82, and a connecting member 70 is disposed between the transmission assembly 44 and the output shaft 82;

when the connecting member 70 is in the connecting state, the output shaft 82 transmits power to the bottom surface of the light box body 30 through the transmission of the adjusting member 40, and pushes the light box body 30 to rotate around the hinge point at the top end of the hinge rod 45;

when the coupling member 70 is in the disconnected state, no transmission is transmitted between the output shaft 82 and the adjustment member 40.

When the lamp box body 30 needs to be adjusted, the speed reduction motor 81 is started to drive the output shaft 82 to rotate, power is output, and the speed reduction motor 81 drives the supporting seat 11 to horizontally rotate on the top surface of the base 12 under the transmission action of the rotating part 50;

when the connecting component 70 is in a disconnected state, the supporting seat 11 drives the lamp box body 30 to synchronously rotate, and the lamp box body 30 can be displayed in an all-around manner by three hundred sixty degrees through the horizontal rotation of the lamp box body 30, so that the attention is attracted, and the display effect is better;

when the connecting component 70 is in a connecting state, when the output shaft 82 rotates, the output shaft 82 drives the light box body 30 to rotate around the top end of the hinge rod 45 through the transmission effect of the adjusting component 40 positioned above the output shaft 82, so that in the horizontal rotation process of the light box body 30, the inclination angle is continuously changed, the visual field observed by a user is adjusted, when the light box body 30 is at a proper inclination angle, the connecting component 70 is disconnected, at this time, the inclination angle of the light box body 30 is adjusted, at this time, the inclination angle of the light box body 30 is not changed any more, and the light box body rotates horizontally synchronously with the supporting seat 11; the visual field of observing through to the user is adjusted, makes the user's observation visual field better, and for horizontality and vertical state, the user does not observe the dead angle and omits, can see all positions on lamp house body 30 surface, and the practicality is better.

Through having set up two kinds of different regulation modes, can adjust the inclination of lamp house body 30, also can carry out the horizontal rotation to lamp house body 30, for common lamp house, attract attention more, the effect of show is better, possesses better propaganda effect, and the practicality is better.

Referring to fig. 1 and 5, a motor groove 121 for accommodating the reduction motor 81 is formed in the bottom surface of the base 12, at least a part of the bottom end of the reduction motor 81 extends out of the motor groove 121, a supporting leg 122 is fixedly connected to the bottom surface of the base 12, and the height of the supporting leg 122 is greater than the height of the portion of the reduction motor 81 extending out of the motor groove 121.

When the cooling device is used, cavities are formed around the speed reducing motor 81 and at the bottom end by utilizing the matching between the motor groove 121 and the supporting legs 122, so that the speed reducing motor 81 can dissipate heat in the using process.

Referring to fig. 1 and 6, the supporting sliding rods 111 are distributed in an array on the bottom surface of the supporting seat 11, the bottom ends of the supporting sliding rods 111 are fixedly connected with the limiting sliding blocks 124, the surface of the base 12 opposite to the limiting sliding blocks 124 is provided with an annular ring groove 123, and the annular ring groove 123 is matched with the limiting sliding blocks 124.

When in use, the annular ring groove 123 is matched with the limit slider 124, and the limit slider 124 slides along the inside of the annular ring groove 123, so that the support seat 11 can drive the support sliding rod 111 to slide along the surface of the base 12.

Referring to fig. 2, the rotating member 50 includes a mounting bracket 54 fixed to an outer side of the output shaft 82, an inner ring rack 55 fixed to a surface of the mounting bracket 54, a rotary plate 51 fixed to an inward side of the support sliding rod 111, an outer ring rack 52 fixed to a surface of the rotary plate 51, a linkage assembly 53 for driving the inner ring rack 55 and the outer ring rack 52, and the inner ring rack 55 drives the outer ring rack 52 to rotate through the linkage assembly 53.

When the rotary table is in use, after the output shaft 82 outputs power, the output shaft 82 drives the mounting bracket 54 and the inner ring rack 55 to rotate, and under the transmission action of the linkage assembly 53, the inner ring rack 55 drives the outer ring rack 52 to rotate, so as to drive the rotary table 51 to rotate, and further drive the supporting slide rod 111 and the supporting seat 11 to rotate.

Referring to fig. 2, the linkage assembly 53 includes a fixed column 531 located on the top surface of the base 12, a gear connecting rod 532 is rotatably inserted into the top end of the fixed column 531, an outer ring gear 533 and an inner ring gear 534 are respectively fixed to two ends of the gear connecting rod 532, the outer ring gear 533 is engaged with the outer ring rack 52, and the inner ring gear 534 is engaged with the inner ring rack 55.

When the inner ring rack 55 rotates, under the action of meshing force of the gears, the inner ring rack 55 drives the inner ring gear 534 to rotate, the inner ring gear 534 drives the gear connecting rod 532 and the outer ring gear 533 to rotate, under the action of meshing force of the gears, the outer ring gear 533 drives the outer ring rack 52 and the rotary disc 51 to rotate, and transmission effect is achieved between the outer ring rack 52 and the inner ring rack 55.

Referring to fig. 1, the adjusting member 40 further includes a driving screw 41 penetrating the top end of the supporting base 11, a screw thread sleeve 43 is screwed on the outer side of the driving screw 41, a light box connecting rod 42 sliding along the bottom surface of the light box body 30 is fixed on the top end of the screw thread sleeve 43, and the light box body 30 is driven to rotate around the top end of the hinge rod 45; the top end of the light box connecting rod 42 is fixed with a ball 421, one side of the light box body 30 facing the ball 421 starts to be provided with a ball groove 31, and the ball 421 is matched with the ball groove 31.

When the lamp box body 30 needs to be adjusted in inclination, the screw rod thread sleeve 43 drives the lamp box connecting rod 42 to move axially along the transmission screw rod 41 by rotating the transmission screw rod 41 under the action of the thread engagement force, and the lamp box body 30 is pushed to rotate along the top end of the hinge rod 45 in the process that the lamp box connecting rod 42 slides along the bottom surface of the lamp box body 30; the ball groove 31 is matched with the ball 421, so that the ball 421 slides along the inside of the ball groove 31, and the ball groove 31 plays a limiting role on the ball 421, so that the lamp box connecting rod 42 slides in a certain range.

Referring to fig. 1 and 4, the transmission assembly 44 includes a first bevel gear 441 fixed on the outer side of the two ends of the transmission screw rod 41, a second bevel gear 442 engaged with the bottom end of the first bevel gear 441, a transmission connecting rod 443 fixed on the bottom end of the second bevel gear 442, a first gear 444 coaxially rotating on the outer side of the bottom end of the transmission connecting rod 443, a second gear 445 coaxially rotating on the top end of the output shaft 82, the second gear 445 located between the two first gears 444 and engaged with both the two first gears 444.

When the transmission screw 41 is used, the output shaft 82 drives the second gear 445 to rotate, the second gear 445 drives the first gear 444, the transmission connecting rod 443 and the second bevel gear 442 to rotate, and under the meshing action between the gears, the second bevel gear 442 drives the first bevel gear 441 to rotate, so that the transmission screw 41 is driven to rotate.

Referring to fig. 1, 5 and 7, a connecting member 70 is disposed between the output shaft 82 and the second gear 445, the connecting member 70 includes an extension rod 73 fixed to a bottom surface of the second gear 445, a connecting pipe 71 is fixed to a bottom end of the extension rod 73, the output shaft 82 is slidably disposed inside the connecting pipe 71, dovetail blocks 821 are distributed in an array manner on an outer side of the output shaft 82, and dovetail grooves 72 are formed in the inner wall of the connecting pipe 71 opposite to the dovetail blocks 821; the elevating member 60 for controlling the elevating of the output shaft 82 is provided outside the reduction motor 81, and the dovetail block 821 is disengaged from the dovetail groove 72 when the reduction motor 81 is at the low position, and the dovetail block 821 is fitted to the dovetail groove 72 when the reduction motor 81 is at the high position.

When the light box is used, when the output shaft 82 needs to transmit power to the bottom end of the light box body 30 through the adjusting component 40, the lifting component 60 lifts the speed reduction motor 81 and the output shaft 82, so that the dovetail block 821 is matched with the dovetail groove 72, and the output shaft 82 can drive the connecting pipe 71 and the second gear 445 to rotate.

Referring to fig. 5, the lifting member 60 includes a lifting groove 63 formed inside the base 12, a lifting screw 62 is rotatably connected to an inner top surface of the lifting groove 63, a lifting thread sleeve 64 is screwed on an outer side thread of the lifting screw 62, a fixing hoop 61 is fixed to an outer side of the speed reduction motor 81, and the fixing hoop 61 and the lifting thread sleeve 64 are fixedly connected through a connecting block 65.

When the lifting screw 62 is rotated, the lifting threaded sleeve 64 and the fixing hoop 61 move along the surface of the lifting screw 62 under the action of the threads, and the fixing hoop 61 drives the speed reduction motor 81 and the output shaft 82 to lift. When the light box body 30 needs to be adjusted, the inclination angle can be adjusted while the light box body 30 rotates horizontally, the dovetail block 821 is matched with the dovetail groove 72, the speed reducing motor 81 can drive the transmission screw rod 41, and when the light box body 30 only needs to rotate horizontally, the dovetail block 821 is separated from the dovetail groove 72.

In the case of the example 2, the following examples are given,

on the basis of embodiment 1, this embodiment provides an LED display screen, including display screen body 20, the lamp house body 30 is removable is fixed in the top surface of lamp house body 30, for example the block is fixed, screw thread tightening, adsorb fixedly etc. with display screen body 20 simultaneous movement.

When the lamp box body 30 is adjusted, the display screen body 20 is consistent with the lamp box body 30.

It is noted that, in this document, relational terms such as first and second, and the like, if any, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a LED lamp house, includes lamp house support (10) and lamp house body (30), lamp house support (10) are including supporting seat (11) and base (12), its characterized in that: the bottom end of the base (12) is provided with a speed reducing motor (81), the top end of the speed reducing motor (81) is provided with an output shaft (82) used for outputting power, a rotating part (50) playing a role in transmission is arranged on the outer side of the output shaft (82), and the speed reducing motor (81) drives the supporting seat (11) to horizontally rotate along the top surface of the base (12) through the rotating part (50);

the lamp box body (30) is positioned above the supporting seat (11), an adjusting part (40) is arranged between the supporting seat (11) and the lamp box body (30), the adjusting part (40) comprises a hinge rod (45) fixed on the top surface of one side of the supporting seat (11), and the lamp box body (30) is hinged to the top end of the hinge rod (45); the adjusting component (40) further comprises a transmission assembly (44) positioned above the output shaft (82), and a connecting component (70) is arranged between the transmission assembly (44) and the output shaft (82);

when the connecting part (70) is in a connecting state, the output shaft (82) transmits power to the bottom surface of the lamp box body (30) through the transmission of the adjusting part (40) to push the lamp box body (30) to rotate around a hinge point at the top end of the hinge rod (45); when the connecting part (70) is in the disconnection state, no transmission is transmitted between the output shaft (82) and the adjusting part (40).

2. The LED light box of claim 1, wherein: the bottom surface of the base (12) is provided with a motor groove (121) for accommodating the speed reducing motor (81), at least part of the bottom end of the speed reducing motor (81) extends out of the motor groove (121), the bottom surface of the base (12) is fixedly connected with supporting legs (122), and the height of the supporting legs (122) is larger than that of the part, extending out of the motor groove (121), of the speed reducing motor (81).

3. The LED light box of claim 2, wherein: the bottom surface array of supporting seat (11) distributes and has support slide bar (111), support slide bar (111) bottom fixedly connected with limit slide (124), base (12) are offered for the surface of limit slide (124) and are annular ring groove (123), annular ring groove (123) and limit slide (124) looks adaptation.

4. The LED light box of claim 3, wherein: the rotating part (50) comprises a mounting bracket (54) fixed on the outer side of the output shaft (82), an inner ring rack (55) is fixed on the surface of the mounting bracket (54), a rotary disc (51) is fixed on one inward side of the support sliding rod (111), an outer ring rack (52) is fixed on the surface of the rotary disc (51), a linkage assembly (53) playing a transmission role is arranged between the inner ring rack (55) and the outer ring rack (52), and the inner ring rack (55) drives the outer ring rack (52) to rotate through the linkage assembly (53).

5. The LED light box of claim 4, wherein: the linkage assembly (53) comprises a fixing column (531) located on the top surface of the base (12), a gear connecting rod (532) is arranged at the top end of the fixing column (531) in a penetrating mode in a rotating mode, an outer ring gear (533) and an inner ring gear (534) are fixed to two ends of the gear connecting rod (532) respectively, the outer ring gear (533) is meshed with the outer ring rack (52), and the inner ring gear (534) is meshed with the inner ring rack (55).

6. The LED light box of claim 1, wherein: the adjusting part (40) further comprises a transmission screw rod (41) penetrating through the top end of the supporting seat (11), a screw rod threaded sleeve (43) is screwed on the outer side of the transmission screw rod (41), a lamp box connecting rod (42) sliding along the bottom surface of the lamp box body (30) is fixed at the top end of the screw rod threaded sleeve (43), and the lamp box body (30) is driven to rotate around the top end of the hinge rod (45); the lamp box connecting rod (42) top be fixed with ball (421), lamp box body (30) begin to have ball groove (31) towards one side of ball (421), ball (421) and ball groove (31) looks adaptation.

7. The LED light box of claim 6, wherein: the transmission assembly (44) comprises first bevel gears (441) fixed to the outer sides of two ends of the transmission screw rod (41), second bevel gears (442) are meshed to the bottom ends of the first bevel gears (441), transmission connecting rods (443) are fixed to the bottom ends of the second bevel gears (442), first gears (444) are coaxially rotated on the outer sides of the bottom ends of the transmission connecting rods (443), second gears (445) are coaxially rotated on the top ends of the output shafts (82), the second gears (445) are located between the two first gears (444), and the two first gears (444) are in a meshed state.

8. The LED light box of claim 2, wherein: a connecting part (70) is arranged between the output shaft (82) and the second gear (445), the connecting part (70) comprises an extension rod (73) fixed to the bottom surface of the second gear (445), a connecting pipe (71) is fixed to the bottom end of the extension rod (73), the output shaft (82) is slidably arranged in the connecting pipe (71), dovetail blocks (821) are distributed on the outer side of the output shaft (82) in an array mode, and dovetail grooves (72) are formed in the connecting pipe (71) relative to the inner wall of the dovetail blocks (821); the outer side of the speed reducing motor (81) is provided with a lifting component (60) used for controlling the lifting of the output shaft (82), when the speed reducing motor (81) is located at a low position, the dovetail block (821) is separated from the dovetail groove (72), and when the speed reducing motor (81) is located at a high position, the dovetail block (821) is matched with the dovetail groove (72).

9. The LED light box of claim 8, wherein: the lifting component (60) is including seting up in inside lift groove (63) of base (12), the interior top surface of lift groove (63) is rotated and is connected with lifting screw rod (62), the outside screw thread of lifting screw rod (62) has closed lifting thread bush (64) soon, the outside of gear motor (81) is fixed with fixed hoop (61), through connecting block (65) fixed connection between fixed hoop (61) and lifting thread bush (64).

10. The utility model provides a LED display screen, includes display screen body (20), its characterized in that: the display screen body (20) is detachably fixed to the light box body (30) of claims 1 to 9, and moves synchronously with the display screen body (20).