CN109668030B

CN109668030B - Display screen folding mechanism

Info

Publication number: CN109668030B
Application number: CN201811639511.2A
Authority: CN
Inventors: 严华锋; 谢海岐; 王小君; 徐慧文; 何晓新; 王富圆; 戴欢斌; 黄元乐; 王洪光
Original assignee: Zhejiang Dafeng Industry Co Ltd
Current assignee: Zhejiang Dafeng Industry Co Ltd
Priority date: 2018-12-29
Filing date: 2018-12-29
Publication date: 2021-06-01
Anticipated expiration: 2038-12-29
Also published as: CN109668030A

Abstract

The invention discloses a display screen folding mechanism which comprises a plurality of mechanical arms and a plurality of display screens arranged corresponding to the mechanical arms, wherein the mechanical arms are sequentially hinged by connecting joints, and two adjacent mechanical arms and the corresponding connecting joints are respectively defined as a first mechanical arm, a second mechanical arm and a first connecting joint; the first mechanical arm is provided with a first driving piece, the first driving piece can drive the first connecting joint to rotate towards the direction rotating angle P of the first mechanical arm, the second mechanical arm is provided with a second driving piece, the second driving piece can drive the second mechanical arm to rotate towards the direction rotating angle Q of the first connecting joint, and the angle P is complementary with the angle Q. Through reasonable structural arrangement, the visual effect presented when the display screen plays a picture can be improved, and the integral carrying of the display screen folding mechanism is facilitated.

Description

Display screen folding mechanism

Technical Field

The invention belongs to the technical field related to stage equipment, and particularly relates to a display screen folding mechanism.

Background

With the development of the technology level and the continuous pursuit of people for the performance effect, a display screen is usually arranged on a stage, and a variable picture can be played by the display screen to cooperate with the performance of a guest performing on the stage, so that various visual effects can be presented.

However, the existing display screen for stage is usually disposed behind the stage, is a fixed display screen, cannot move relative to the stage, has a single structure and a monotonous use effect, so that the picture presented by the display screen has a two-dimensional image quality, and is not suitable for a performance with a complex artistic effect, and the final presented effect is difficult to meet the use requirement of a high-quality performance activity.

At present, in the existing stage equipment, a folding mechanism which can be driven by mutually folding a plurality of display screens does not exist.

Disclosure of Invention

In view of the above, it is necessary to provide a display screen folding mechanism for solving the technical problems in the prior art.

The display screen folding mechanism comprises a plurality of mechanical arms and a plurality of display screens arranged corresponding to the mechanical arms, wherein the mechanical arms are sequentially connected through connecting joints; the method is characterized in that: every two adjacent mechanical arms are respectively hinged with the corresponding connecting joints, the two adjacent mechanical arms are defined as a first mechanical arm and a second mechanical arm, and the connecting joints respectively hinged with the first mechanical arm and the second mechanical arm are defined as first connecting joints; the first mechanical arm is provided with a first driving piece, the first driving piece can drive the first connecting joint to rotate towards the direction rotating angle P of the first mechanical arm, the second mechanical arm is provided with a second driving piece, the second driving piece can drive the second mechanical arm to rotate towards the direction rotating angle Q of the first connecting joint, and the angle P is complementary with the angle Q.

As a preferable aspect of the present invention, the angle P and the angle Q are respectively set to 90 °.

As a preferred embodiment of the present invention, after the mechanical arms on the display screen folding mechanism are completely unfolded, the orientations of the display screens on the corresponding mechanical arms are uniformly arranged, and when the mechanical arms on the display screen folding mechanism are completely folded, the display screens on the corresponding mechanical arms are arranged in parallel.

As a preferable aspect of the present invention, the first driving element and/or the second driving element is provided as an electric cylinder.

As a preferable aspect of the present invention, the first driving member includes two electric cylinders, the two electric cylinders are disposed in parallel in the first robot arm, and the two electric cylinders are respectively hinged to the first connecting joint and the first robot arm.

As a preferable aspect of the present invention, the second driving member includes two electric cylinders, the two electric cylinders are respectively disposed on two opposite sides of the second robot arm, and the two electric cylinders are respectively hinged to the first connecting joint and the second robot arm.

As a preferable scheme of the present invention, two hinge joints are provided between the first mechanical arm and the first connecting joint; and two hinged nodes hinged between the second mechanical arm and the first connecting joint are also arranged.

As a preferable scheme of the present invention, each of the robot arms is provided with a second rotation driving mechanism, and the display screen corresponding to the robot arm is disposed on the robot arm through the second rotation driving mechanism.

As a preferable mode of the present invention, the second rotary driving mechanism includes a second rotary driving motor, a second driving gear, and a rotary gear, a rotating shaft portion of the second rotary driving motor is connected to the second driving gear in a rotation stop manner, teeth of the second driving gear are engaged with teeth of the rotary gear, and the rotary gear is arranged in parallel along the corresponding direction of the robot arm.

As a preferable scheme of the present invention, the display screen folding mechanism includes three robot arms.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:

according to the display screen folding mechanism provided by the invention, the first connecting joint can be driven by the first driving workpiece to face the corresponding display screen rotating angle P on the first mechanical arm, and the side, provided with the display screen, of the second mechanical arm is driven by the second driving part to face the first connecting joint rotating angle Q, so that the mutual folding of the display screens respectively arranged on the first mechanical arm and the second mechanical arm is realized.

Drawings

Fig. 1 is a schematic structural diagram of a mobile screen dancing device according to an embodiment of the present invention.

FIG. 2 is a schematic view of another view angle of the mobile screen dancing device in FIG. 1.

FIG. 3 is a front view of the alternative view of the mobile dance screen apparatus of FIG. 1, wherein the display folding mechanism is in a folded state.

FIG. 4 is a front view of the alternative view of the mobile dance screen apparatus of FIG. 1, wherein the display folding mechanism is in a first unfolded state.

FIG. 5 is a front view of the alternative view of the mobile dance screen apparatus of FIG. 1, wherein the display folding mechanism is in a second unfolded state.

FIG. 6 is a front view of the alternative view of the mobile dance screen apparatus of FIG. 1, wherein the display folding mechanism is in a third unfolded state.

FIG. 7 is a front view of the alternative view of the mobile dance screen apparatus of FIG. 1, wherein the display folding mechanism is in a fourth unfolded state.

FIG. 8 is a schematic structural view of another perspective of the upright support structure of the mobile screen dancing device in FIG. 1.

FIG. 9 is a schematic diagram of another view of the dual-hinge folding mechanism of the mobile dancing screen device in FIG. 1.

FIG. 10 is a schematic view of the structure of the robotic arm of the mobile screen dancing device in FIG. 1.

FIG. 11 is a schematic view of the top arm of the mobile screen dancing device of FIG. 1.

10, a frame; 20. a tire; 100. moving the trolley; 200. a column; 201. a first rotary drive motor; 202. a first drive gear; 203. a speed reducer; 210. a first rotary drive mechanism; 211. a rotating part; 212. a hinged support; 220. a swing drive mechanism; 221. connecting a support; 300. a display screen folding mechanism; 301. a first robot arm; 302. a second mechanical arm; 303. a first connecting joint; 304. a first driving member; 305. a second driving member; 310. a mechanical arm; 311. a second rotary drive mechanism; 312. a turnover driving mechanism; 320. a display screen; 330. a connecting joint; 3011. mounting a support; 3021. a limiting frame; 3111. a second rotary drive motor; 3112. a second drive gear; 3113. a rotating gear; 3121. turning over a driving motor; 3122. a third drive gear; 3123. turning over the gear; 3124. and turning over the supporting seat.

Detailed Description

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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1 to 7, a mobile screen dancing device according to an embodiment of the present invention includes a mobile cart 100, a pillar support structure disposed on the mobile cart 100, and a display screen folding mechanism 300 disposed on the pillar support structure.

The moving trolley 100 is a main supporting structure of the moving dancing screen device and is used for supporting the upright post 200 arranged on the moving trolley 100.

In this embodiment, the mobile cart 100 includes a frame 10 and a plurality of tires 20 disposed on the frame 10, the tires 20 are rotatably connected to the frame 10, and the whole mobile screen dancing device can be moved by rolling of the tires 20, so as to realize the flexible displacement of the mobile screen dancing device.

Furthermore, the moving trolley 100 is further provided with a supporting leg structure (not shown), so that when people use the moving screen dancing device, the supporting leg structure can be in contact with and supported by the supporting platform surface, and the overall stability of the moving screen dancing device during working is improved.

In the present embodiment, the column support structure includes a column 200, a first rotation driving mechanism 210 for driving the column 200 to rotate in the horizontal direction, and a swing driving mechanism 220 for driving the column 200 to swing left and right in the vertical direction, thereby implementing a composite driving of the rotation and the swing left and right of the display folding mechanism 300 placed on the column support structure.

Referring to fig. 8, the moving cart 100 is provided with a first rotation driving mechanism 210 and a swing driving mechanism 220, the first rotation driving mechanism 210 can drive the upright post 200 to rotate in the horizontal direction, and the swing driving mechanism 220 can drive the upright post 200 to swing left and right in the vertical direction.

The first rotary driving mechanism 210 includes a rotary part 211 capable of rotating in a horizontal direction, a hinged support 212 is disposed on the rotary part 211, and the upright column 200 is hinged to the hinged support 212; the swing driving mechanism 220 can drive the upright post 200 to swing left and right on the hinge support 212. It can be understood that the horizontal direction of the rotation of the column 200 by the first rotation driving mechanism 210 is the direction of the plane of the mobile cart 100.

First rotary driving mechanism 210 includes first rotary driving motor 201, first drive gear 202 and rotation fluted disc, the rotation fluted disc does first rotary driving mechanism 210's rotating part 211, just the rotation fluted disc sets up along the horizontal direction, first drive gear 202 with the pivot portion of first rotary driving motor 201 is splines and is connected, just tooth on the first drive gear 202 with tooth on the rotation fluted disc meshes mutually.

Further, the first rotation driving mechanism 210 further includes a speed reducer 203, and the first rotation driving motor 201 is connected to the first driving gear 202 through the speed reducer 203 in a rotation stopping manner, so as to increase a torque when the first rotation driving motor 201 drives the first driving gear 202 in a rotation. When the first rotary driving mechanism 210 works, the first rotary driving motor 201 drives the first driving gear 202 to rotate, and the first driving gear 202 is meshed with the teeth of the rotating toothed disc to realize the rotary driving of the rotating toothed disc, so as to drive the upright post 200 fixed on the rotating toothed disc through the hinged support 212 to rotate, thereby realizing the rotary driving of the upright post 200 by the first rotary driving mechanism 210 in the horizontal direction.

Two hinged supports 212 are further fixed on the disc surface of the rotating fluted disc, so that when the rotating fluted disc is driven by the first rotary driving motor 201 to rotate, the upright column 200 can be driven to rotate by the two hinged supports 212, and the stability of the rotating fluted disc on the rotary driving of the upright column 200 is improved; and two hinge shafts (not shown) of the two hinge supports 212, which are respectively hinged to the upright 200, are arranged in line, so as to ensure the swing driving of the swing driving mechanism 220 to the upright 200. It should be understood that the number of the hinged supports 212 fixed on the rotating toothed disc is not limited to that shown in the drawings, and those skilled in the art can set the number of the hinged supports 212 fixed on the rotating toothed disc to one, three, or even more, according to the requirement, when the number of the hinged supports 212 is multiple, the multiple hinged supports 212 are respectively arranged in line with the hinge axis hinged to the upright 200.

In this embodiment, the swing driving mechanism 220 is provided as an electric cylinder, and the electric cylinder is hinged to the upright 200 at a predetermined included angle, so as to realize the reciprocating swing of the upright 200 on the hinged support 212 through the telescopic motion of the electric cylinder.

Specifically, the cylinder portion of the electric cylinder is disposed on the rotating portion 211 of the first rotary driving mechanism 210 in an articulated manner, and preferably, the rotating portion 211 of the first rotary driving mechanism 210 is disposed with a connecting support 221, and the connecting support 221 is articulated with the cylinder portion of the electric cylinder; the telescopic rod portion of the electric cylinder is hinged to the upright post 200, and particularly hinged to a mechanical arm (not shown) arranged on the side wall of the upright post 200. That is, the swing drive mechanism 220 of the present embodiment is provided on the rotating portion 211 of the first rotation drive mechanism 210, and is rotatable together with the column 200 along with the rotating portion 211.

Further, the swing driving mechanism 220 of the present embodiment includes two electric cylinders, and the two electric cylinders are disposed in parallel and hinged to the upright 200 and the rotating portion 211, respectively. When the swing driving mechanism 220 works, the two electric cylinders are simultaneously started and swing and drive the upright column 200, so that double insurance of swing and drive of the upright column 200 on the rotating part 211 of the first rotation driving mechanism 210 is realized, and further, the swing and drive of the swing driving mechanism 220 on the upright column 200 is ensured. It is to be understood that the swing driving mechanism 220 is not limited to the electric cylinder in the present embodiment, and those skilled in the art may configure the swing driving mechanism 220 as an air cylinder, an oil cylinder, or an electric push rod, etc. according to the requirement.

The display screen folding mechanism 300 includes a plurality of mechanical arms 310 and a plurality of display screens 320 corresponding to the mechanical arms 310, wherein the plurality of mechanical arms 310 are sequentially connected by a connecting joint 330, and the upright post 200 and the corresponding mechanical arms 310 are also connected by the connecting joint 330.

In this embodiment, after the mechanical arms 310 on the display screen folding mechanism 300 are completely unfolded, the orientations of the display screens 320 on the mechanical arms 310 are uniformly arranged, and when the mechanical arms 310 on the display screen folding mechanism 300 are completely folded, the display screens 320 on the mechanical arms 310 are arranged in parallel.

Specifically, the display screen folding mechanism 300 in this embodiment specifically includes three mechanical arms 310, and each of the mechanical arms 310 is provided with one display screen 320. It is understood that the number of the robot arms 310 is not limited to the number shown in the drawings, and those skilled in the art may arrange two, four, or even more robot arms according to the requirement.

Every two adjacent mechanical arms 310, the upright post 200 and the corresponding mechanical arm 310 are hinged to the corresponding connecting joint 330, and every two adjacent mechanical arms 310, the upright post 200 and the corresponding mechanical arm 310 can be mutually folded by 180 degrees, so that the integral folding of the display screen folding mechanism 300 is realized; on the one hand, the moving dance screen device is convenient to carry integrally, and on the other hand, the mechanical arm 310 can be driven to perform folding motion by matching with playing contents on the display screen 320, so that the fidelity of the playing contents on the display screen 320 is improved.

For convenience of description, the present embodiment defines two adjacent robot arms 310 as a dual-hinge folding mechanism, and please refer to fig. 9, the dual-hinge folding mechanism includes a first robot arm 301, a second robot arm 302, and a first connecting joint 303 hinged to the first robot arm 301 and the second robot arm 302, respectively. A first driving member 304 is disposed on the first robot arm 301, and the first driving member 304 can drive the first connecting joint 303 to rotate 90 degrees towards the direction of the first robot arm 301; the second mechanical arm 302 is provided with a second driving member 305, and the second driving member 305 can drive the second mechanical arm 302 to rotate 90 ° towards the direction of the first connection joint 303. Therefore, after the mechanical arms 310 on the display screen folding mechanism 300 are completely folded, the display screens 320 corresponding to the mechanical arms 310 are arranged in parallel, wherein after the two mechanical arms 310 are folded, the display screens 320 corresponding to the two mechanical arms 310 can be arranged face to face, and a predetermined distance is arranged between the two display screens 320, so that the two display screens 320 are prevented from being damaged due to mutual touching.

Wherein the first drive 304 and/or the second drive 305 are provided as electric cylinders. It is understood that the first driving member 304 and the second driving member 305 are not limited to the illustrated electric cylinders, and those skilled in the art can configure the first driving member 304 and/or the second driving member 305 as an air cylinder, an oil cylinder, an electric push rod, etc. according to the requirement.

Further, the first driving member 304 includes two electric cylinders, and the two electric cylinders are disposed in the first robot arm 301 in parallel, wherein the tail end of the cylinder portion of the electric cylinder is hinged to the first robot arm 301, and specifically, the hinge connection between the first driving member and the first robot arm is realized through a mounting support 3011 fixed on the first robot arm 301; and the second driving member 305 comprises two electric cylinders, and the two electric cylinders are respectively arranged on two opposite sides of the second mechanical arm 302, and the cylinder parts of the electric cylinders are limited on the second mechanical arm 302 by a limiting frame 3021, wherein the cylinder parts of the electric cylinders are hinged with the limiting frame 3021. It can be understood that the first driving element 304 is configured as two electric cylinders, and the second driving element 305 is configured as two electric cylinders, so that the first driving element 304 and the second driving element 305 achieve double safety for the folding driving of the first mechanical arm 301 and the second mechanical arm 302, and further improve the stability when the first mechanical arm 301 and the second mechanical arm 302 are driven to fold each other.

In the present embodiment, the working principle of the mutual folding between the column 200 and the corresponding mechanical arm 310 through the connecting joint 330 is the same as the working principle of the mutual folding between two adjacent mechanical arms 310, and will not be described herein.

In the present embodiment, the display screen 320 is disposed on the corresponding robot arm 310 and can rotate in the direction of the robot arm 310 with respect to the corresponding robot arm 310.

Each of the arms 310 of the display folding mechanism 300 of the present embodiment is provided with a second rotation driving mechanism 311, and the display screen 320 on the corresponding arm 310 is provided on the second rotation driving mechanism 311, so that the second rotation driving mechanism 311 drives the display screen 320 to rotate on the corresponding arm 310.

Referring to fig. 10, the second rotation driving mechanism 311 includes a second rotation driving motor 3111, a second driving gear 3112 and a rotation gear 3113, wherein a rotation shaft of the second rotation driving motor 3111 is connected to the second driving gear 3112 in a rotation-stopping manner, and teeth of the second driving gear 3112 are engaged with teeth of the rotation gear 3113; the corresponding display screen 320 on the mechanical arm 310 is fixed on the tooth surface of the rotating gear 3113, and preferably, the display screen 320 is fixedly connected with the rotating gear 3113 through a flange. When the second rotary driving mechanism 311 operates, the second rotary driving motor 3111 drives the second driving gear 3112 to rotate, and the second driving gear 3112 is engaged with the teeth of the rotary gear 3113 to drive the rotary gear 3113 to rotate, so as to drive the display screen 320 fixed on the rotary gear 3113 to rotate. It is to be understood that the second rotation driving mechanism 311 is not limited to the illustration, and those skilled in the art can configure the second rotation driving mechanism 311 as a direct-drive motor, a disk motor, etc. and use it to drive the display screen 320 in rotation according to the requirement.

In the display folding mechanism 300 of the present embodiment, the arm 310 provided at the top end is provided with a flip driving mechanism 312, and the flip driving mechanism 312 can drive the corresponding display 320 to flip up and down along the direction of the arm 310. That is, in the present embodiment, the display screen 320 provided on the one robot arm 310 at the tip end can be folded along with the robot arm 310 by rotating with respect to the robot arm 310, and can be turned upside down with respect to the robot arm 310, thereby improving the effect that the display screen 320 can exhibit when the display screen folding apparatus 300 is used.

Referring to fig. 11, the tilting driving mechanism 312 includes a tilting driving motor 3121, a third driving gear 3122 and a tilting gear 3123, and an axial direction of the tilting gear 3123 is parallel to and fixedly connected to a direction of the display screen 320. The fixed connection between the flip gear 3123 and the display screen 320 is preferably realized by using a flip support 3124, wherein the flip support 3124 is fixed on the tooth surface of the flip gear 3123 by a connecting member such as a screw, and one end of the flip support 3124 extending out of the flip gear 3123 is fixed vertically with the display screen 320; the rotating shaft part of the overturning driving motor 3121 is in rotation stopping connection with the third driving gear 3122, and the teeth on the third driving gear 3122 are meshed with the teeth on the overturning gear 3123. When the inversion driving mechanism 312 operates, the inversion driving motor 3121 drives the third driving gear 3122 to rotate, and the inversion gear 3123 is driven to rotate by the meshing of the teeth between the third driving gear 3122 and the inversion gear 3123, because the display screen 320 is vertically fixed on the inversion gear 3123, the rotation of the inversion gear 3123 is converted into the up-and-down inversion of the display screen 320 along the direction of the corresponding mechanical arm 310, and the up-and-down inversion of the display screen 320 can be driven by the forward-and-backward rotation of the rotation shaft portion of the inversion driving motor 3121.

It can be understood that the display screen 320 corresponding to the top end of the mechanical arm 310 on the display screen folding mechanism 300 is disposed on the mechanical arm 310 through the second rotation driving mechanism 311, so as to drive the display screen 320 to rotate by the second rotation driving mechanism 311, therefore, in order to realize the composite driving of rotation and swing of the display screen 320, in this embodiment, the rotation gear 3113 for fixing with the display screen 320 on the second rotation driving mechanism 311 is fixed on the flip support 3124 on the flip driving mechanism 312, so that the second rotation driving mechanism 311 disposed corresponding to the display screen 320 is driven by the swing of the flip driving mechanism 312 along with the display screen 320.

By last knowing, this embodiment's removal dancing screen device is at the during operation, locate display screen 320 on arm 310 follows corresponding arm 310 and is folding motion in, can rotate on the arm 310 that corresponds, and the arm 310 on top can also be done and overturn from top to bottom, and whole display screen folding mechanism 300 can also rotate along the horizontal direction on stand 200, and the horizontal hunting is gone up to vertical direction, and the broadcast content of cooperation display screen 320, demonstrate the visual effect of three-dimensional integral type at last, and then satisfy the user demand of stage.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A display screen folding mechanism is used for moving a screen dancing device and comprises a plurality of mechanical arms and a plurality of display screens arranged corresponding to the mechanical arms, wherein the mechanical arms are sequentially connected through connecting joints; the method is characterized in that: every two adjacent mechanical arms are respectively hinged with the corresponding connecting joints, the two adjacent mechanical arms are defined as a first mechanical arm and a second mechanical arm, and the connecting joints respectively hinged with the first mechanical arm and the second mechanical arm are defined as first connecting joints; a first driving piece is arranged on the first mechanical arm and can drive the first connecting joint to rotate by an angle P towards the direction of the first mechanical arm, a second driving piece is arranged on the second mechanical arm and can drive the second mechanical arm to rotate by an angle Q towards the direction of the first connecting joint, and the angle P is complementary with the angle Q; the angle P and the angle Q are set to 90 °, respectively.

2. The display screen folding mechanism of claim 1, characterized in that: after the arm on the display screen folding mechanism is completely unfolded, corresponding to the display screen orientation on the arm is uniformly arranged, and the arm on the display screen folding mechanism is completely folded and is corresponding to the display screens on the arm are arranged in parallel.

3. The display screen folding mechanism of claim 1, characterized in that: the first driving member and/or the second driving member are/is provided as an electric cylinder.

4. The display screen folding mechanism of claim 3, characterized in that: the first driving piece comprises two electric cylinders, the two electric cylinders are arranged in the first mechanical arm in parallel, and the two electric cylinders are respectively hinged with the first connecting joint and the first mechanical arm.

5. The display screen folding mechanism of claim 3, characterized in that: the second driving piece comprises two electric cylinders, the two electric cylinders are respectively arranged on two opposite sides of the second mechanical arm, and the two electric cylinders are respectively hinged with the first connecting joint and the second mechanical arm.

6. The display screen folding mechanism of claim 1, characterized in that: two hinged nodes hinged between the first mechanical arm and the first connecting joint are arranged; and two hinged nodes hinged between the second mechanical arm and the first connecting joint are also arranged.

7. The display screen folding mechanism of claim 1, characterized in that: and each mechanical arm is provided with a second rotary driving mechanism, and the corresponding display screen on the mechanical arm is arranged on the mechanical arm through the second rotary driving mechanism.

8. The display screen folding mechanism of claim 7, characterized in that: the second rotary driving mechanism comprises a second rotary driving motor, a second driving gear and a rotating gear, a rotating shaft part of the second rotary driving motor is connected with the second driving gear in a rotation stopping mode, teeth of the second driving gear are meshed with teeth of the rotating gear, and the rotating gear is arranged in parallel along the direction of the mechanical arm correspondingly.

9. The display screen folding mechanism of claim 1, characterized in that: the display screen folding mechanism comprises three mechanical arms.