CN211821532U

CN211821532U - Ultra-short elevator

Info

Publication number: CN211821532U
Application number: CN202020088641.8U
Authority: CN
Inventors: 吴宣勇; 魏豪
Original assignee: Hangzhou Desk Media Science & Technology Co ltd
Current assignee: Hangzhou Desk Media Science & Technology Co ltd
Priority date: 2020-01-15
Filing date: 2020-01-15
Publication date: 2020-10-30
Anticipated expiration: 2030-01-15

Abstract

The utility model relates to the technical field of display screen lifting equipment, in particular to an ultra-short lifter, which comprises a frame, wherein the frame comprises a side plate and an opening, a turnover plate is movably arranged at the opening of the frame, a lifting platform is arranged in the frame, and a linkage component is arranged between the turnover plate and the lifting platform, and is characterized in that the linkage component comprises a rotating arm, the rotating arm comprises a hinged end and a sliding end, a hollowed-out track is arranged on the side plate, the rotating arm is connected with a pull rope for driving the sliding end to slide back and forth along the hollowed-out track, the pull rope is provided with an inclined section arranged along the lifting direction of the lifting platform, the inclined section is fixedly sleeved with a propping block, a synchronous press plate for pressing the propping block downwards to enable the pull rope to slide synchronously along with the movement of the lifting platform is arranged on the lifting platform, the end part, the utility model discloses a linkage subassembly simple structure, processing is easy, adopts flexible transmission structure, and the linkage subassembly operation is more for smooth.

Description

Ultra-short elevator

Technical Field

The utility model relates to a display screen jacking equipment technical field especially relates to an ultrashort lift.

Background

The invention discloses an ultra-short turning and falling integrated machine (publication number: CN108903264A), which comprises a cavity for accommodating a liquid crystal screen and the liquid crystal screen, wherein a lifting mechanism for driving the liquid crystal screen to obliquely lift is arranged in the cavity, and the liquid crystal screen is connected with a turnover mechanism for adjusting the angle of the liquid crystal screen; the upper surface of the cavity is provided with an opening through which the liquid crystal screen can extend out of the cavity after rising from the cavity, the opening is provided with a turning plate, two ends of the turning plate are respectively in linkage connection with a lifting mechanism through a link mechanism, the turning plate turns downwards to open the opening when the lifting mechanism opens and rises, and the turning plate turns upwards to close the opening after the lifting mechanism descends and closes. Although the linkage arrangement is arranged between the turning plate and the lifting mechanism so as to realize that the turning plate is opened in time when the liquid crystal screen rises and is automatically closed after the liquid crystal screen falls, the linkage arrangement adopts a link mechanism, namely a plurality of connecting rods are required to be mutually matched, the structure is complex, the precision requirement is high, the processing cost is high, and the turning of the turning plate is not smooth enough.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to prior art current situation, provide an ultrashort lift, linkage between its flip board and the elevating system sets up simple structure, and flip board upset is smooth and easy.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an ultrashort elevator comprises a frame, the frame comprises side plates arranged on two sides and an opening arranged above the side plates, a turnover plate is movably arranged at the opening of the frame, a lifting platform for driving a display screen to obliquely lift inside and outside the frame is arranged in the frame, and a linkage assembly is arranged between the turnover plate and the lifting platform, and is characterized in that the linkage assembly comprises a rotating arm, the rotating arm comprises a hinged end for rotatably connecting with the side plates and a sliding end for driving the turnover plate to turn over, a hollow track for guiding and limiting the sliding end is arranged on the side plates, the rotating arm is connected with a pull rope for driving the sliding end to slide back and forth along the hollow track, the pull rope is provided with an inclined section arranged along the lifting direction of the lifting platform, the inclined section is fixedly sleeved with a jacking block, and the lifting platform is provided with a synchronous pressing plate for pressing the jacking block downwards to enable the pull, the end part of the inclined section is wound on the rotating arm and is connected with a reset elastic piece used for pulling the pull rope to slide along the opposite direction.

As a preferred embodiment of the utility model, flip board hinge joint between the board of both sides, and flip board back is equipped with the sliding tray that extends along its width direction, the swinging boom include mutually perpendicular's rotary rod and drive round pin, the rotary rod is kept away from the one end of drive round pin and is connected with the curb plate through a rotation connecting piece, the drive round pin is located the slip of swinging boom and serves, and the drive round pin slides in fretwork track and sliding tray simultaneously.

As a preferred embodiment of the utility model, the elevating platform be connected with and be used for driving the elevating platform to carry out the lifting unit that the slant goes up and down, lifting unit includes the conveyer belt that sets up along the incline direction and is used for driving conveyer belt pivoted elevator motor, the elevating platform is equipped with the meshing briquetting and is used for cooperating the bottom plate that the meshing briquetting pressed from both sides tight conveyer belt, the conveyer belt clamp is located between meshing briquetting and the bottom plate, the internal surface and the conveyer belt mesh of meshing briquetting mutually.

As a preferred embodiment of the utility model, the curb plate on be equipped with and be used for carrying out the steering to the stay cord, the steering is including being used for turning to the wheelset around the head that to the conveyer belt below with the both ends of slope section and afterbody turn to the wheelset, the head turns to the wheelset and the afterbody turns to the wheelset and locates conveyer belt head and the tail both sides respectively, and the head turns to the wheelset including locating the connecting wheel on the rotary rod, and the slope section is close to the head and turns to the one end of wheelset and is walked around the head and turn to the wheelset and be connected with the elastic component that resets, and the elastic component that resets is kept away from the one end of stay cord and is fixed in on the curb plate, the one end that the auxiliary elastic component kept away from the stay cord is fixed in on the curb.

As a preferred embodiment of the present invention, the inner side of the side plate is provided with a guide rail bar, the guide rail bar is disposed along the direction of the lift table, and the lift table is provided with a sliding seat sliding on the guide rail bar.

As the utility model discloses a preferred embodiment, the rotatable elevating platform of locating of display screen on, be equipped with the angle adjustment mechanism who is used for adjusting display screen inclination between elevating platform and the display screen, angle adjustment mechanism includes mount, screen pivot and is used for driving screen pivot pivoted drive shaft, and screen pivot and drive shaft are rotatable to be located on the mount, and the cover is equipped with driven tight pulley and initiative tight pulley respectively in screen pivot and the drive shaft, is connected with first connecting rod and the second connecting rod that is parallel to each other between driven tight pulley and the initiative tight pulley, the both ends of first connecting rod and second connecting rod articulate respectively on driven tight pulley and initiative tight pulley, drive shaft connection has and is used for driving drive shaft pivoted drive assembly.

As a preferred embodiment of the present invention, the angle adjusting mechanism further comprises a detecting component for detecting a current tilt state of the display screen, the detecting component comprises a first photoelectric sensor and a second photoelectric sensor, the first photoelectric sensor and the second photoelectric sensor are respectively provided with a first shielding plate and a second shielding plate for shielding optical signals thereof, the first shielding plate and the second shielding plate are annular plates with notches and are concentrically arranged with the driving shaft, and the notches of the first shielding plate and the second shielding plate are not completely overlapped; the lifting direction of the lifting platform is taken as a reference, the inclined states comprise a forward tilting state, a backward tilting state and a parallel state, when the display screen is in the parallel state, optical signals of the first photoelectric sensor and the second photoelectric sensor are simultaneously shielded, when the display screen is in the forward tilting state, only the optical signal of the first photoelectric sensor is shielded, and when the display screen is in the backward tilting state, only the optical signal of the second photoelectric sensor is shielded.

As an optimized embodiment of the present invention, the supporting block is a rubber cylinder and a steel core concentrically disposed along the supporting block, the steel core is fixedly connected to the steel wire rope, and the rubber cylinder is tightly sleeved outside the steel core.

The beneficial effects of the utility model reside in that:

1) the utility model discloses a linkage subassembly passes through stay cord, top to the piece, locate mutually supporting between the synchronous clamp plate on the elevating platform, realizes that the cooperation of flip board when the display screen rises is opened and the cooperation of display screen after descending is closed, simple structure, and processing is easy, adopts flexible transmission structure, and the operation of linkage subassembly is more for smooth, and the while cushioning nature is better.

2) The utility model discloses a drive round pin slides in the structure setting of fretwork track and sliding tray simultaneously, has greatly reduced the orbital radian of fretwork, and the fretwork track tends to the mild, and the gliding of drive round pin is more smooth and easy, laborsaving, and the upset of flip board is more smooth and easy, laborsaving.

Drawings

Fig. 1 is a side view of the present invention.

Fig. 2 is a perspective view of the present invention.

Fig. 3 is a partially enlarged view of the area a of fig. 2.

Fig. 4 is a schematic structural diagram of the display screen in a parallel state.

Fig. 5 is a schematic structural view of the angle adjustment mechanism.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings and embodiments:

example 1

Referring to fig. 1-4, the utility model discloses an ultra-short elevator, which comprises a frame 1, the frame 1 comprises side plates 11 disposed at two sides and an opening 12 disposed at the top, a display screen 3 is exposed out of the frame 1 through the opening 12, a flip plate 2 is movably disposed at the opening 12 of the frame 1, a lifting platform 4 for driving the display screen 3 to obliquely lift inside and outside the frame 1 is disposed in the frame 1, a linkage assembly 5 is disposed between the flip plate 2 and the lifting platform 4, the linkage assembly 5 comprises a rotating arm 51, the rotating arm 51 comprises a hinge end rotatably connected with the side plate 11 and a sliding end for driving the flip plate 2 to turn, a hollow track 13 for guiding and limiting the sliding end is disposed on the side plate 11, the rotating arm 51 is connected with a pull rope 52 for driving the sliding end to slide back and forth along the hollow track 13, in this embodiment, the pull rope 52 is a steel wire rope, the pull rope 52 is provided with an inclined section arranged along the lifting direction of the lifting platform 4, the inclined section is fixedly sleeved with a propping block 53, the fixed sleeving here means that the propping block 53 and the pull rope 52 do not slide relatively, the lifting platform 4 is provided with a synchronous pressing plate 54 for pressing down the propping block 53 to enable the pull rope 52 to slide synchronously along with the movement of the lifting platform 4, the synchronous pressing plate 54 is provided with a through hole for the pull rope 52 to pass through, the end part of the inclined section is wound on the rotating arm 51 and connected with a reset elastic part 55 for pulling the pull rope 52 to slide in the opposite direction, the opposite direction is the opposite direction of the direction in which the synchronous pressing plate 54 acts on the pull rope 52, and in the embodiment, the reset elastic part 55 is a strip-shaped spring.

With reference to fig. 1, the operation principle of the present invention is as follows:

when the display screen 3 is accommodated in the rack 1, the lifting platform 4 is located at the lower left of the rack 1, the abutting block 53 on the pulling rope 52 is pressed by the synchronous pressing plate 54, the pulling rope 52 is fixed, the rotating arm 51 is tightened by the pulling rope 52 and is fixed at one end of the hollow track 13, the flip plate 2 is kept in a horizontal state at the moment, the flip plate covers the opening 12, the reset elastic piece 55 is in a stretching state, when the lifting platform 4 ascends along the upper right, the synchronous pressing plate 54 ascends along with the lifting platform 4, the abutting block 53 is gradually separated from the pressing of the synchronous pressing plate 54, the reset elastic piece 55 contracts to pull the pulling rope 52 to rotate clockwise, the sliding end of the rotating arm 51 slides from one end of the hollow track 13 to the other end, the flip plate 2 is driven to be turned to a vertical state from the horizontal state, and the opening 12.

When the display screen 3 is completely used and is to be accommodated in the rack 1, the lifting platform 4 descends, the synchronous pressing plate 54 descends along with the synchronous pressing plate, until the synchronous pressing plate 54 abuts against the abutting block 53, the synchronous pressing plate 54 presses the abutting block 53 downwards, the abutting block 53 moves towards one side far away from the opening 12, the pull rope 52 is driven to slide along with the synchronous pressing plate, the rotating arm 51 is driven to rotate by taking the hinged end as an axis, the sliding end of the pulling rotating arm 51 slides along the hollow track 13, the linkage flip plate 2 is overturned to the opening 12 from a vertical state, and the opening 12 is blocked.

The utility model discloses a linkage subassembly 5 passes through stay cord 52, supports piece 53, locates mutually supporting between the synchronous clamp plate 54 on elevating platform 4, realizes that the cooperation of flip board 2 when display screen 3 rises is opened and the cooperation of display screen 3 after the decline is closed, simple structure, and processing is easy, adopts flexible transmission structure, and linkage subassembly 5 moves more smoothly, and the while cushioning nature is better.

In this embodiment, the abutting block 53 is a rubber cylindrical body and a steel core concentrically arranged along the steel core, and is fixedly connected to the steel wire rope through the steel core, and the rubber cylindrical body is tightly sleeved outside the steel core, which is not only beneficial to tightly connecting the abutting block 53 and the steel wire rope, but also beneficial to improving the fit tightness when the abutting block 53 abuts against the synchronous pressing plate 54.

As a preferred embodiment of the present invention, the flip board 2 is provided with the shaft hole 21, and hinge between the two side boards 11 through the rotation axis, and the back of the flip board 2 is provided with the sliding slot 22 extending along the width direction of the flip board 2, the rotating arm 51 includes the mutually perpendicular rotating rod 512 and the driving pin 513, one end of the rotating rod 512 away from the driving pin 513 is connected with the side board 11 through the shaft pin 511, the driving pin 513 is located the sliding end of the rotating arm 51, and the driving pin 513 slides in the hollow track 13 and the sliding slot 22 simultaneously.

In the using process, the pulling rope 52 is pulled by the synchronous pressing plate 54 or the reset elastic element 55 to slide, so as to drive the rotating rod 512 to rotate by taking the shaft pin 511 as the axis, the driving pin 513 slides along the hollow track 13, and meanwhile, the driving pin 513 abuts against the inner wall of the sliding groove 22, so as to drive the flip plate 2 to rotate by taking the rotating shaft as the axis.

The utility model discloses a drive round pin 513 slides in the structure setting of fretwork track 13 and sliding tray 22 simultaneously, has greatly reduced fretwork track 13's radian, and fretwork track 13 tends to gently, and drive round pin 513 slides more smoothly, laborsaving, and the upset of flip board 2 is more smooth and easy, laborsaving.

As a preferred embodiment of the utility model, elevating platform 4 is connected with and is used for driving elevating platform 4 to carry out the lifting unit 6 that the slant goes up and down, lifting unit 6 includes conveyer belt 61 that sets up along the incline direction and is used for driving conveyer belt 61 pivoted elevator motor 62, be connected through the synchronizing wheel between elevator motor 62 and the conveyer belt 61, elevating platform 4 is equipped with meshing briquetting 63 and is used for the cooperation to mesh briquetting 63 and presss from both sides the bottom plate 64 of pressing from both sides tight conveyer belt 61, it is fixed through the screw stack between meshing briquetting 63 and the bottom plate 64, conveyer belt 61 presss from both sides and locates between meshing briquetting 63 and the bottom plate 64, the internal surface and the conveyer belt 61 mesh of meshing briquetting 63, in the use, along with the transport of conveyer belt 61, meshing briquetting 63 removes along with conveyer belt 61, thereby it goes up.

The inboard of curb plate 11 is equipped with the direction rail bar, and the direction rail bar sets up along the lift place direction of elevating platform 4, and elevating platform 4 is equipped with the sliding seat that slides on the direction rail bar, and the sliding seat is opening 12 towards the C type structure of direction rail bar, and elevating platform 4 slides on the direction rail bar through the sliding seat, and the guide effect through the direction rail bar makes the lift of elevating platform 4 more steady.

As a preferred embodiment of the present invention, a steering member 7 for steering the pulling rope 52 is disposed on the side plate 11, the steering member 7 includes a head steering wheel set 71 and a tail steering wheel set 72 for winding two ends of an inclined section to the lower side of the conveyor belt 61, the head steering wheel set 71 and the tail steering wheel set 72 are respectively disposed at the head and the tail sides of the conveyor belt 61, the head steering wheel set 71 and the tail steering wheel set 72 are respectively composed of a plurality of guide wheels, the head steering wheel set 71 includes a connecting wheel 711 disposed on the rotating rod 512, one end of the inclined section near the head steering wheel set 71 winds around the head steering wheel set 71 and is connected with the restoring elastic member 55, one end of the restoring elastic member 55 far away from the pulling rope 52 is fixed on the side plate 11, one end of the inclined section near the tail steering wheel set 72 winds around the tail steering wheel set 72 and is connected with the auxiliary elastic member 8, one end of the auxiliary elastic element 8 far from the pull rope 52 is fixed on the side plate 11, and the rebound direction between the return elastic element 55 and the auxiliary elastic element 8 is reverse.

Example 2

The difference between this embodiment and embodiment 1 is that the display screen 3 is rotatably disposed on the lifting table 4, an angle adjusting mechanism 9 for adjusting an inclination angle of the display screen 3 is further disposed between the lifting table 4 and the display screen 3, as shown in fig. 4 to 5, the angle adjusting mechanism 9 includes a fixing frame 91, a screen rotating shaft 92 and a driving shaft 93 for driving the screen rotating shaft 92 to rotate, the screen rotating shaft 92 is fixedly connected with the display screen 3, the screen rotating shaft 92 and the driving shaft 93 are rotatably disposed on the fixing frame 91 through a bearing sleeve, the screen rotating shaft 92 and the driving shaft 93 are respectively sleeved with a driven fixed wheel 94 and a driving fixed wheel 95, the driven fixed wheel 94 and the screen rotating shaft 92 do not rotate relatively, the driving fixed wheel 95 and the driving shaft 93 do not rotate relatively, for example, the driven fixed wheel 94 and the driving fixed wheel 95 are connected with a first connecting rod 96 and a second connecting rod 97 which are parallel to each other, the ring surface of the driven fixed wheel 94 is provided with a first hinge hole and a second hinge hole for being mutually hinged with the first connecting rod 96 and the second connecting rod 97, the ring surface of the driving fixed wheel 95 is provided with a third hinge hole and a fourth hinge hole for being mutually hinged with the first connecting rod 96 and the second connecting rod 97, two ends of the first connecting rod 96 and the second connecting rod 97 are respectively hinged on the driven fixed wheel 94 and the driving fixed wheel 95, the axes of the first hinge hole and the second hinge hole, the axes of the third hinge hole and the fourth hinge hole, the first connecting rod 96 and the second connecting rod 97 form a parallelogram transmission structure, and the driving shaft 93 is connected with a driving assembly 98 for driving the driving shaft 93 to rotate The screen rotating shaft 92 rotates along with the screen rotating shaft, and the display screen 3 rotates by taking the screen rotating shaft 92 as an axis, so that the inclination angle of the display screen 3 is adjusted.

In order to improve the stability of the parallelogram transmission structure, two driven fixed wheels 94 and two driving fixed wheels 95 can be respectively arranged, and a first connecting rod 96 and a second connecting rod 97 are clamped between the two driven fixed wheels 94 and the two driving fixed wheels 95.

The angle adjusting mechanism 9 is further provided with a detecting assembly 99 for detecting the current tilt state of the display screen 3, the detecting assembly 99 comprises a first photoelectric sensor 991 and a second photoelectric sensor 992, the first photoelectric sensor 991 and the second photoelectric sensor 992 are respectively provided with a first shielding plate 993 and a second shielding plate 994 for shielding optical signals thereof, the first shielding plate 993 and the second shielding plate 994 are annular plates with notches 995 and are concentrically arranged with the driving shaft 93, in this embodiment, the first shielding plate 993 and the second shielding plate 994 are fixed by a fixed ring sleeved on the driving shaft 93 or the damping shaft, the notches 995 of the first shielding plate 993 and the second shielding plate 994 are not completely overlapped to ensure that the situation that only one photoelectric sensor is shielded can occur, the direction in which the lifting platform 4 is lifted is taken as a reference, the tilt state comprises a forward tilt state, a backward tilt state and a parallel state, when the display screen 3 is in a parallel state, the optical signals of the first photoelectric sensor 991 and the second photoelectric sensor 992 are simultaneously shielded, when the display screen 3 is in a forward tilting state, only the optical signal of the first photoelectric sensor 991 is shielded, and when the display screen 3 is in a backward tilting state, only the optical signal of the second photoelectric sensor 992 is shielded.

Specifically, when the display screen 3 is in a parallel state (i.e. the display screen 3 is parallel to the lifting direction of the lifting table 4), the optical signals of the first photoelectric sensor 991 and the second photoelectric sensor 992 are simultaneously blocked, when the display screen 3 is in a forward tilting state (i.e. the included angle a between the display screen 3 and the horizontal plane is smaller than the included angle b between the lifting direction of the lifting table 4 and the horizontal plane), the first photoelectric sensor 991 is blocked by the ring surface of the first blocking plate 993, the notch 995 of the second blocking plate 994 just turns to the second photoelectric sensor 992, the optical signal of the second photoelectric sensor 992 is not blocked, i.e. only the optical signal of the first photoelectric sensor 991 is blocked, when the display screen 3 is in a backward tilting state (i.e. the included angle a between the display screen 3 and the horizontal plane is larger than the included angle b between the lifting direction of the lifting table 4 and the horizontal plane), only the optical signal of the second photoelectric sensor 992 is blocked, control program judges the current tilt state of display screen 3 through the condition whether first photoelectric sensor 991, second photoelectric sensor 992 light signal are sheltered from, as a concrete implementation mode of the utility model, before display screen 3 income frame 1, control program judges the current tilt state of display screen 3 earlier, if display screen 3 is not in parallel state, rotate and then adjust display screen 3 to parallel state through control drive shaft 93 (rotate drive shaft 93 until first photoelectric sensor 991 and second photoelectric sensor 992 light signal are sheltered from simultaneously promptly)

The utility model discloses a determine module 99 can realize whether display screen 3 is in the parallel state before accomodating and judges to reset display screen 3 to the parallel state through the judged result, need not artifical manual angle regulation, effectively avoid display screen 3 to collide with opening 12 in accomodating the in-process simultaneously, display screen 3 accomodates more conveniently, smoothly, and the degree of safety is higher.

In this document, "first", "second", "third", "fourth", and the like are used only for distinguishing one from another, and do not indicate importance, order, and the like of them, and a premise that each other exists.

Finally, it should be noted that the principles and embodiments of the present invention have been described herein using specific examples, and the description of the above embodiments is only used to help the method and its core idea of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. An ultrashort elevator comprises a frame, the frame comprises side plates arranged on two sides and an opening arranged above the side plates, a turnover plate is movably arranged at the opening of the frame, a lifting platform for driving a display screen to obliquely lift inside and outside the frame is arranged in the frame, and a linkage assembly is arranged between the turnover plate and the lifting platform, and is characterized in that the linkage assembly comprises a rotating arm, the rotating arm comprises a hinged end for rotatably connecting with the side plates and a sliding end for driving the turnover plate to turn over, a hollow track for guiding and limiting the sliding end is arranged on the side plates, the rotating arm is connected with a pull rope for driving the sliding end to slide back and forth along the hollow track, the pull rope is provided with an inclined section arranged along the lifting direction of the lifting platform, the inclined section is fixedly sleeved with a jacking block, and the lifting platform is provided with a synchronous pressing plate for pressing the jacking block downwards to enable the pull, the end part of the inclined section is wound on the rotating arm and is connected with a reset elastic piece used for pulling the pull rope to slide along the opposite direction.

2. The ultrashort elevator as claimed in claim 1, wherein the flip plate is hinged between the two side plates, and a sliding slot extending along a width direction of the flip plate is disposed at a back of the flip plate, the rotation arm includes a rotation rod and a driving pin perpendicular to each other, an end of the rotation rod away from the driving pin is connected to the side plates through a rotation connection member, the driving pin is disposed at a sliding end of the rotation arm, and the driving pin slides in the hollow track and the sliding slot simultaneously.

3. The ultra-short lift as claimed in claim 2, wherein the lift platform is connected to a lift assembly for driving the lift platform to move up and down in an inclined direction, the lift assembly comprises a conveyor belt disposed in the inclined direction and a lift motor for driving the conveyor belt to rotate, the lift platform is provided with an engaging press block and a bottom plate for clamping the conveyor belt in cooperation with the engaging press block, the conveyor belt is clamped between the engaging press block and the bottom plate, and an inner surface of the engaging press block is engaged with the conveyor belt.

4. The ultra-short elevator as claimed in claim 3, wherein the side plate is provided with a steering member for steering the pulling rope, the steering member comprises a head steering wheel set and a tail steering wheel set for winding the two ends of the tilting segment to the lower part of the conveyor belt, the head steering wheel set and the tail steering wheel set are respectively arranged at the head and the tail of the conveyor belt, the head steering wheel set comprises a connecting wheel arranged on a rotating rod, one end of the tilting segment close to the head steering wheel set is wound around the head steering wheel set and connected with a reset elastic member, one end of the reset elastic member far away from the pulling rope is fixed on the side plate, one end of the tilting segment close to the tail steering wheel set is wound around the tail steering wheel set and connected with an auxiliary elastic member, one end of the auxiliary elastic member far away from the pulling rope is fixed on the side plate, and.

5. Ultrashort elevator according to claim 3, wherein the inner side of the side plate is provided with a guide rail, the guide rail is provided along the direction in which the elevating platform is lifted, and the elevating platform is provided with a sliding seat sliding on the guide rail.

6. The ultrashort elevator as claimed in any one of claims 1 to 5, wherein the display screen is rotatably disposed on the elevating platform, an angle adjusting mechanism for adjusting an inclination angle of the display screen is disposed between the elevating platform and the display screen, the angle adjusting mechanism includes a fixing frame, a screen rotating shaft and a driving shaft for driving the screen rotating shaft to rotate, the screen rotating shaft and the driving shaft are rotatably disposed on the fixing frame, a driven fixed wheel and a driving fixed wheel are respectively sleeved on the screen rotating shaft and the driving shaft, a first connecting rod and a second connecting rod parallel to each other are connected between the driven fixed wheel and the driving fixed wheel, two ends of the first connecting rod and the second connecting rod are respectively hinged on the driven fixed wheel and the driving fixed wheel, and the driving shaft is connected with a driving assembly for driving the driving shaft to rotate.

7. The ultrashort elevator as recited in claim 6, wherein the angle adjusting mechanism further comprises a detecting component for detecting the current tilt state of the display screen, the detecting component comprises a first and a second photoelectric sensor, the first and the second photoelectric sensor are respectively provided with a first and a second shielding plate for shielding the optical signal thereof, the first and the second shielding plates are annular plates with notches and are concentric with the driving shaft, and the notches of the first and the second shielding plates are not completely overlapped; the lifting direction of the lifting platform is taken as a reference, the inclined states comprise a forward tilting state, a backward tilting state and a parallel state, when the display screen is in the parallel state, optical signals of the first photoelectric sensor and the second photoelectric sensor are simultaneously shielded, when the display screen is in the forward tilting state, only the optical signal of the first photoelectric sensor is shielded, and when the display screen is in the backward tilting state, only the optical signal of the second photoelectric sensor is shielded.

8. The ultra-short elevator as claimed in claim 1, wherein the supporting block is a rubber cylinder and a steel core concentrically disposed, the steel core is fixedly connected to the steel cable, and the rubber cylinder is tightly sleeved outside the steel core.