CN210244066U - Electric projection screen capable of being transversely rolled - Google Patents

Abstract

A transversely-rolled electric projection screen comprises a curtain, a scroll and a driving device, and is characterized by further comprising pulley belts and guide rails, wherein the scroll is vertically arranged, the pulley belts are connected to the edges of the upper end and the lower end of the curtain, the guide rails are arranged in parallel at intervals and transversely extend, and the pulley belts can move in a limiting manner along the guide rails under the driving of the driving device to transversely expand the curtain; the pulley belt can be driven by the driving device to wind around the reel so as to transversely wind the curtain. The utility model discloses an electronic projection screen of horizontal rolling, its reducible overall dimension not only does benefit to transport and installation, can guarantee the tensioning of curtain and the roughness after the expansion moreover to its result of use that can conveniently realize screen curtain and non-planar curtain, its range of application is very extensive, and it has very strong practicality.

Description

Electric projection screen capable of being transversely rolled

[ technical field ] A method for producing a semiconductor device

The utility model relates to an electronic projection screen, in particular to carry out electronic projection screen of horizontal rolling along screen length direction.

[ background of the invention ]

Traditional electronic projection screen, all be the rolling from top to bottom usually, the structure main part of its rolling is installed at the top, and when needs open the curtain, the curtain is opened downwards perpendicularly. Because the curtain is opened vertically downwards, the length of the curtain after being rolled is usually not less than the length of the curtain. For large-size curtains, the length of the curtain can reach more than 5 meters. However, the existing high-rise building, whether the elevator door or the room door, generally cannot meet the requirement of carrying the whole projection screen with the length of 5 meters, so that the whole carrying of the large-size electric projection screen has certain difficulty. As is known, for a large-sized curtain, the height dimension of the curtain is much smaller than the length dimension of the curtain, so that if the curtain can be transversely rolled along the length direction of the curtain, the overall rolled structure dimension can be reduced, thereby facilitating the overall transportation and installation.

In addition, the conventional electric projection screen is rolled up and down along the height direction, and the curtain is usually a plane curtain, which is not easy to be set into an arc or curved curtain. This is because the curtain of rolling from top to bottom, when the curtain was opened perpendicularly downwards, it was through relying on the dead weight to keep the level of curtain, if set up the curtain into arc or curved surface type, the curtain just can't keep good surface flatness and influence the projection effect. Therefore, the existing electric projection screen is limited by the rolling mode, and the application range and the application value of the electric projection screen are limited.

[ Utility model ] content

The utility model aims at solving the above problem, and provide one kind and can follow curtain length direction and carry out horizontal rolling to overall structure size after the reducible rolling does benefit to the electronic projection screen of the horizontal rolling of transport and installation and range of application more extensive.

In order to achieve the above object, the present invention provides an electric projection screen capable of being rolled up horizontally, which includes a screen, a reel and a driving device, and is characterized in that the electric projection screen further includes a pulley belt and a guide rail, wherein the reel is vertically disposed, the pulley belt is connected to the edges of the upper and lower ends of the screen, the guide rail is disposed in parallel at intervals and extends horizontally, and the pulley belt can be driven by the driving device to move along the guide rail in a limited manner so as to expand the screen horizontally; the pulley belt can be driven by the driving device to wind around the reel so as to transversely wind the curtain.

The device also comprises a conveyor belt, wherein the reel comprises a first reel, a second reel and a third reel, the first reel, the second reel and the third reel are arranged in parallel at intervals, and the first reel and the second reel are respectively connected with the driving device and can rotate; the third reel is positioned at the other end of the guide rail opposite to the first reel; the pulley belts are arranged on the upper side and the lower side of the curtain along the height direction and are connected with the edge of the curtain through curtain clamps, the extending direction of the pulley belts is consistent with the length direction of the curtain, one end of each pulley belt is connected with the first reel, the other end of each pulley belt is connected with the conveying belt, the other end of each conveying belt bypasses a third reel located at the far end and is connected with the second reel, and when the driving device drives the first reel to rotate, the pulley belts are wound around the first reel to drive the curtain to be transversely wound around the first reel; when the driving device drives the second reel to rotate, the conveyor belt winds the second reel to pull the pulley belt, so that the curtain is driven to be transversely unfolded.

The driving device comprises a first driving motor and a second driving motor, the first driving motor is in driving connection with the first reel and can drive the first reel to rotate; the second driving motor is in driving connection with the second reel and can drive the second reel to rotate.

The driving device comprises a third driving motor, a first one-way bearing and a second one-way bearing, wherein the first one-way bearing and the second one-way bearing are connected with the third driving motor; when the third driving motor rotates forwards or backwards, the first one-way bearing rotates to drive the first reel to rotate; when the third driving motor rotates reversely or forwardly, the second one-way bearing rotates to drive the second reel to rotate.

And a tensioning pinch roller device which can swing along with the winding size of the pulley belt and press the pulley belt is arranged on the periphery of the pulley belt wound around the first winding shaft.

The pulley belt comprises a plurality of belt units hinged with each other, each belt unit is hinged with each other and is in a long strip shape, one end of each belt unit or the plurality of belt units, which faces the curtain, is connected with a curtain clamp, and two side surfaces of each belt unit are respectively provided with a positioning convex part and a positioning groove, the shape and the size of the positioning convex part are matched with those of the positioning groove, when the pulley belt winds the first winding shaft, the positioning convex part of each belt unit is respectively embedded into the positioning groove of the belt unit overlapped with the pulley belt unit.

The guide rail is provided with a first cavity and a second cavity which are parallel to each other, the first cavity and the second cavity respectively extend along the length direction of the guide rail, a limiting groove which limits the pulley belt to move in a limiting manner along the length direction of the guide rail is arranged in the first cavity, an opening is arranged in the direction of the first cavity facing the curtain, and the opening is communicated from one end of the guide rail to the other end of the guide rail; one end of the pulley belt is connected with the first reel shaft, and the other end of the pulley belt is connected with the conveyor belt; the other end of the conveyor belt passes around the third reel and through the second cavity to connect with the second reel.

And sliding wheels are respectively arranged on the belt units and matched with the limiting grooves.

Vertical supporting parts are respectively arranged on the inner walls of two opposite sides of the first cavity, the supporting parts divide the first cavity into a first limiting cavity and a first open cavity which are communicated with each other, one side of the first open cavity facing the curtain is provided with the opening, and the inner wall of the first limiting cavity opposite to the opening is respectively provided with a first guide groove and a second guide groove; the belt pulley unit comprises a first main body part, a second main body part, a first sliding wheel and a second sliding wheel, the first main body part and the second main body part are integrally or fixedly connected, the first main body part is limited in the first limiting cavity, and the second main body part is positioned in the first open cavity; and a first sliding wheel and a second sliding wheel are respectively arranged at two ends of the first main body part, the first sliding wheel is matched with the first guide groove, and the second sliding wheel is matched with the second guide groove.

The curtain cloth clamps are connected between the belt pulley units at intervals, the end parts of the belt pulley units between every two adjacent curtain cloth clamps are connected with third sliding wheels, and the third sliding wheels are matched with the openings and can move along the openings in a limiting mode.

The winding device comprises a first fixing component and a second fixing component which are arranged at intervals, wherein a first reel and a second reel are vertically connected between the first fixing component and the second fixing component; the first fixing piece assembly comprises first outer fixing pieces and first inner fixing pieces which are arranged at intervals, the second fixing piece assembly comprises second outer fixing pieces and second inner fixing pieces, and two ends of the first reel are connected to the first outer fixing pieces and the second outer fixing pieces respectively; the curtain is arranged between the first inner fixing piece and the second inner fixing piece; the pulley belts are arranged between the first outer fixing piece and the first inner fixing piece and between the second outer fixing piece and the second inner fixing piece; one end of the guide rail is respectively arranged between the first outer fixing piece and the first inner fixing piece and between the second outer fixing piece and the second inner fixing piece, and the other end of the guide rail extends out of the first fixing piece assembly and the second fixing piece assembly to form a free end; the third reel is provided at a free end of the guide rail.

And the first fixing part assembly and the second fixing part assembly are respectively provided with a butt joint bayonet aligned with the guide rail.

And the first inner fixing piece and the second inner fixing piece are respectively provided with an introduction hole, one end of each introduction hole corresponds to the position of the opening at the end part of the guide rail, and the other end of each introduction hole faces the first reel.

The guide wheel sets are arranged between the first reel and the inlet of the first cavity, each guide wheel set comprises a first guide wheel and a second guide wheel which are arranged at intervals, and the pulley belt passes through the space between the first guide wheel and the second guide wheel and extends into the first cavity of the guide rail during transmission.

The beneficial contributions of the utility model reside in that, it has effectively solved above-mentioned problem. The utility model discloses an electronic projection screen of horizontal rolling, its curtain carries out horizontal rolling along length direction, and rolling about the direction of height is not gone on, therefore the overall dimension after its rolling is mainly highly relevant with the curtain, and to jumbo size curtain, it is length far more than highly usually, consequently, use this kind of mode to carry out the rolling, can be so that the overall dimension after the rolling is less than traditional electronic projection screen who carries out rolling about going on along the direction of height greatly, therefore it does benefit to whole transport and does not receive the size restriction. Furthermore, the utility model discloses a pulley belt and guide rail restrain the expansion and the rolling of curtain, and its tensioning that not only can guarantee the curtain, and the multiple shape of curtain is realized to the shape of accessible guide rail moreover, and it not only can set to the plane curtain, can set to plane curtain such as curved surface, cambered surface moreover, and its actual application range is wider, and the using value is higher. The utility model discloses an electronic projection screen of horizontal rolling, its reducible overall dimension not only does benefit to transport and installation, can guarantee the tensioning of curtain and the roughness after the expansion moreover, and its range of application is very extensive, and it has very strong practicality.

[ description of the drawings ]

Fig. 1 is a schematic plan view of the overall structure of the present invention.

Fig. 2 is a schematic diagram of the present invention.

Fig. 3 is a schematic diagram of the present invention.

Fig. 4 is a schematic exploded view of the local structure of the present invention.

Fig. 5 is a sectional view of the assembly of the guide rail and the pulley belt.

Fig. 6 is a partially enlarged view of fig. 1.

Fig. 7 is a partial structural schematic view of a pulley belt.

Fig. 8 is a schematic structural view of the belt pulley unit and the cloth curtain clip.

FIG. 9 is a cross-sectional view of a plurality of belt units coiled together.

Fig. 10 is a cross-sectional schematic view of a guide rail.

The curtain 10, the pulley belt 20, the belt unit 21, the first main body 211, the second main body 212, the first sliding wheel 213, the second sliding wheel 214, the third sliding wheel 215, the positioning protrusion 22, the positioning groove 23, the conveyor belt 30, the first reel 41, the curtain reel 411, the pulley belt reel 412, the second reel 42, the third reel 43, the driving device 50, the first driving motor 51, the second driving motor 52, the third driving motor 53, the first one-way bearing 54, the second one-way bearing 55, the curtain clamp 60, the guide rail 70, the free end 71, the first cavity 72, the support portion 721, the first limiting cavity 722, the first open cavity 723, the first guide groove 724, the second guide groove 725, the second cavity 73, the opening 74, the tension pinch roller device 80, the swing pinch roller 81, the pinch roller 82, the first fixing member assembly 91, the first outer fixing member 911, the first inner fixing member 912, the second fixing member assembly 92, the first fixing member assembly 52, the second driving device 52, the third driving motor, The second outer fixing piece 921, the second inner fixing piece 922, the docking bayonet 93, the introduction hole 94, the bearing 95, the through hole 96, the guide pulley group 100, the first guide pulley 101, and the second guide pulley 102.

[ detailed description ] embodiments

The following examples are further to explain and supplement the present invention, and do not constitute any limitation to the present invention.

As shown in fig. 1-10, the utility model discloses an electronic projection screen of horizontal rolling, its main points lie in, it can carry out horizontal rolling along the length direction of curtain 10, carry out the rolling along the left side or the right side of curtain 10 promptly, and rolling about the non-traditional direction of height along curtain 10 goes on, thereby can make the overall dimension after the rolling reduce by a wide margin, thereby do benefit to large size curtain 10 and carry out whole transport and installation, and can realize the screen curtain, the effect of various curtains such as curved surface curtain, its application scope is very extensive.

Specifically, as shown in fig. 1 to 4, the electric projection screen for horizontal rolling of the present invention includes a curtain 10, a pulley belt 20, a conveyor belt 30, a first reel 41, a second reel 42, a third reel 43, a driving device 50, a curtain clamp 60, a guide rail 70, a tension pinch roller device 80, a first fixing member assembly 91, a second fixing member assembly 92, and a guide roller set 100.

The curtain 10 can be of various sizes and types, and it can be a large size curtain 10, such as 2m × 6m curtain 10, or a small size curtain 10, and its size can be selected according to the requirement.

As shown in fig. 2, 3 and 4, the first winding shaft 41, the second winding shaft 42 and the third winding shaft 43 are arranged in parallel at intervals, wherein the first winding shaft 41 is used for winding the curtain 10 and the pulley belt 20, the second winding shaft 42 is used for winding the conveyor belt 30, and the third winding shaft 43 is used for turning and conveying the conveyor belt 30. The driving device 50 is used for driving the first reel 41 and the second reel 42 to rotate, so that the curtain 10, the pulley belt 20 and the conveyor belt 30 can be wound. Further, the driving device 50 can also be used to drive the third reel 43 to rotate. The curtain clamp 60 is used for clamping the edge of the curtain 10, and is connected between the pulley belt 20 and the curtain 10, so that the two side edges of the curtain 10 are respectively connected with the pulley belt 20, and the curtain 10 can move synchronously along with the movement of the pulley belt 20. The guide rail 70 is used for restricting the movement of the pulley belt 20 and supporting the pulley belt 20, so as to ensure the tensioning of the curtain 10; the tensioning pinch roller device 80 can swing along with the winding size of the pulley belt 20, and is used for pressing the pulley belt 20 to prevent the pulley belt 20 from loosening or deviating during winding. The guide pulley set 100 is used to guide the transmission of the pulley belt 20. The first and second fastener assemblies 91, 92 are used to mount a roll-up structure so that the curtain 10 can be rolled between the first and second fastener assemblies 91, 92. As shown in fig. 1 to fig. 3, the overall structure and principle of the present invention are as follows: the first reel 41 and the second reel 42 are transversely arranged between the first fixing component 91 and the second fixing component 92, a set of pulley belts 20 are respectively arranged on the first fixing component 91 and the second fixing component 92, one end of each pulley belt 20 is connected with the first reel 41, the other end of each pulley belt 20 is connected with the conveyor belt 30, and the other end of each conveyor belt 30 bypasses a third reel 43 at the far end to be connected with the second reel 42; a curtain 10 is connected between the two pulley belts 20, and the pulley belts 20 are connected with the two side edges of the curtain 10 through curtain clamps 60; when the driving device 50 drives the first winding shaft 41 to rotate, the pulley belt 20 winds around the first winding shaft 41, so that the curtain 10 can be driven to wind around the first winding shaft 41, and the curtain 10 is wound on the first winding shaft 41 between the first fixing component 91 and the second fixing component 92; when the driving device 50 drives the second winding shaft 42 to rotate, the transmission belt 30 winds around the second winding shaft 42, and at this time, the transmission belt 30 pulls the pulley belt 20 to open toward the distal third winding shaft 43, so that the pulley belt 20 can drive the curtain 10 to open toward the distal third winding shaft 43, so that the curtain 10 is spread out.

Specifically, as shown in fig. 1, the first fastener assembly 91 and the second fastener assembly 92 are spaced apart a distance, and the distance is related to the height of the curtain 10. As shown in fig. 4, the first fixing member assembly 91 includes a first outer fixing member 911 and a first inner fixing member 912 which are arranged at intervals; the second fixing assembly comprises a second outer fixing piece 921 and a second inner fixing piece 922 which are arranged at intervals. The first outer fixing piece 911 and the first inner fixing piece 912 may be of an integral structure or may be connected together in a split structure; similarly, the second outer fixing piece 921 and the second inner fixing piece 922 may be connected together in an integral structure or in a split structure. The first outer fixing member 911 may be a single component, or an assembly structure in which a plurality of components are connected together; the first inner fixing member 912 may be a single component or an assembly structure in which a plurality of components are connected together; the second external fixing piece 921 may be a single piece, or may be an assembled structure in which a plurality of pieces are connected together; the second inner fixing member 922 may be a single component or an assembly structure formed by connecting a plurality of components; in other words, the structures and shapes of the first outer fixing piece 911, the first inner fixing piece 912, the second outer fixing piece 921 and the second inner fixing piece 922 can be set according to needs, and are not limited to the specific shapes shown in the drawings of the specification.

As shown in fig. 1 and 4, a rolling space of the curtain 10 is formed between the first inner fixing piece 912 and the second inner fixing piece 922; a rolling space of the pulley belt 20 is formed between the first inner fixing member 912 and the first outer fixing member 911, and between the second inner fixing member 922 and the second outer fixing member 921.

As shown in fig. 1 and 4, the first reel 41 and the second reel 42 are connected between the first fastener assembly 91 and the second fastener assembly 92. The first winding shaft 41 and the second winding shaft 42 are arranged in parallel at intervals.

The first winding shaft 41 may be a unitary shaft or may be a plurality of components connected together. In this embodiment, as shown in fig. 4, to wind the pulley belts 20 and the curtain 10 separately, the first winding shaft 41 includes a curtain winding shaft 411 and a pulley belt winding shaft 412 connected together. The length of the curtain winding shaft 411 is not less than the height of the curtain 10, and it is disposed between the first inner fixing part 912 and the second inner fixing part 922. The pulley belt reels 412 are respectively fixedly connected to two ends of the curtain reel 411, and the length thereof is not less than the height of the pulley belt 20. One of the pulley belt reels 412 is disposed between the first inner fixing member 912 and the first outer fixing member 911, and the other pulley belt reel 412 is disposed between the second inner fixing member 922 and the second outer fixing member 921.

As shown in fig. 1 and 6, in order to enable the first spool 41 to rotate under the driving of the driving device 50, bearing holes are respectively formed in the first outer fixing piece 911 and the second outer fixing piece 921, bearings 95 are respectively disposed in the bearing holes, and the pulley belt spool 412 of the first spool 41 is engaged with an inner ring of the bearing 95, so that the first spool 41 is transversely connected between the first fixing piece assembly 91 and the second fixing piece assembly 92 and can rotate.

To facilitate connection to the drive 50, one of the pulley belt spools 412 may have an end that extends beyond the bearing 95, as shown in fig. 6, to facilitate connection to the drive 50.

As shown in fig. 4, the second winding shaft 42 may be a unitary shaft or may be a plurality of components connected together. In this embodiment, the arrangement manner of the second reel 42 is the same as the arrangement direction of the first reel 41, and therefore, the description thereof is omitted.

As shown in fig. 1 and 4, in order to drive the first roller 41 and the second roller 42 to rotate, a driving device 50 is mounted on the first fixing member assembly 91 and/or the second fixing member assembly 92. The driving device 50 may be divided into a single motor driving and a dual motor driving according to a driving manner. The dual-motor driving means that the first reel 41 and the second reel 42 are respectively driven by two groups of motors; the single motor driving means that the first reel 41 and the second reel 42 are simultaneously driven by a set of motors. It should be noted that, the single motor is used for driving, and is not limited to the number of the driving motors being one; accordingly, the dual motor drive is not limited to the number of the driving motors being two.

In some embodiments, as shown in fig. 2, the driving device 50 can be driven by a dual-motor driving method: the driving device 50 includes one or more first driving motors 51, second driving motors 52, first driving wheels, and second driving wheels. The first driving motor 51 and the first driving wheel are used for driving the first reel 41 to rotate; the second driving motor 52 and the second transmission wheel are used for driving the second reel 42 to rotate. The first driving wheel is fixedly connected with the end portion of the first reel 41, the first driving motor 51 is fixedly installed on the first fixing member assembly 91 and/or the second fixing member assembly 92, and the output end of the first driving motor 51 is in transmission connection with the first driving wheel through a known transmission structure, so that when the first driving motor 51 works, the first driving wheel can be driven to rotate, and then the first reel 41 can be driven to rotate. Similarly, the second driving wheel is fixedly connected to the end of the second reel 42, the second driving motor 52 is fixedly mounted on the first fixing member assembly 91 and/or the second fixing member assembly 92, and the output end of the second driving motor 52 is in transmission connection with the second driving wheel through a known transmission structure, so that when the second driving motor 52 works, the second driving wheel can be driven to rotate, and further the second reel 42 can be driven to rotate. The first transmission wheel and the second transmission wheel can be chain wheels or belt wheels, and can be arranged as required. The transmission connection between the output end of the first driving motor 51 and the first driving wheel can adopt one or more transmission structures of chain transmission, belt transmission and gear transmission, and the transmission connection can be specifically set according to requirements. The first driving motor 51 and the first driving wheel may be disposed at one side of the first winding shaft 41, so as to drive the first winding shaft 41 to rotate through one end of the first winding shaft 41, and may be symmetrically disposed at two sides of the first winding shaft 41, so as to drive the first winding shaft 41 to rotate through two ends of the first winding shaft 41. In general, the driving of the first winding shaft 41 can be satisfied by separately providing a first driving motor 51 on one side of the first winding shaft 41. Similarly, the output end of the second driving motor 52 is in transmission connection with the second driving wheel, and may adopt one or more transmission structures of chain transmission, belt transmission and gear transmission, and the transmission structure may be specifically set as required. The second driving motor 52 and the second driving wheel may be disposed at one side of the second winding shaft 42, so as to drive the second winding shaft 42 to rotate through one end of the second winding shaft 42, or may be symmetrically disposed at two sides of the second winding shaft 42, so as to drive the second winding shaft 42 to rotate through two ends of the second winding shaft 42; in general, the driving of the second winding shaft 42 can be satisfied by separately providing a second driving motor 52 on one side of the second winding shaft 42.

In some embodiments, as shown in fig. 3, the driving device 50 can be driven by a single motor: the driving device 50 comprises one or more third driving motors 53, a first one-way bearing 54, a second one-way bearing 55, a first driving wheel and a second driving wheel. The driving motor, the first one-way bearing 54 and the first transmission wheel are used for driving the first reel 41 to rotate, the driving motor, the second one-way bearing 55 and the second transmission wheel are used for driving the second reel 42 to rotate, and the first reel 41 and the second reel 42 are driven by the same driving motor. The first one-way bearing 54 and the second one-way bearing 55 are coaxially arranged and connected with the output end of the driving motor; when the driving motor rotates forward, the first one-way bearing 54 rotates, and the second one-way bearing 55 is locked; when the driving motor rotates reversely, the first one-way bearing 54 is locked, and the second one-way bearing 55 rotates, so that the normal rotation and the reverse rotation of the driving motor are respectively output to the outside to drive the first reel 41 and the second reel 42. The first driving wheel is fixedly connected with the end part of the first reel 41, and the second driving wheel is fixedly connected with the end part of the second reel 42; the first transmission wheel is in transmission connection with the first one-way bearing 54 through a known transmission structure; the second transmission wheel is in transmission connection with the second one-way bearing 55 through a known transmission structure; thus, when the driving motor rotates forward, only the first driving wheel can be driven to rotate through the first one-way bearing 54, and only the first reel 41 is driven to rotate; when the driving motor rotates reversely, only the second driving wheel is driven to rotate through the second one-way bearing 55, and then the second winding shaft 42 is driven to rotate. The first transmission wheel and the second transmission wheel can be belt wheels or chain wheels, and can be specifically arranged according to requirements. The transmission connection between the first transmission wheel and the first one-way bearing 54 can adopt one or more transmission structures of chain transmission, belt transmission and gear transmission for transmission connection, and the transmission connection can be specifically arranged according to requirements; similarly, the transmission connection between the second transmission wheel and the second one-way bearing 55 may adopt one or more transmission structures of chain transmission, belt transmission and gear transmission. The driving motors may be disposed only on one side of the first winding shaft 41 and the second winding shaft 42, or may be symmetrically disposed on both sides of the first winding shaft 41 and the second winding shaft 42, and may be specifically disposed as needed. In general, a single driving motor is disposed on one side of the first and second reels 41, 42 to meet the driving requirements of the first and second reels 41, 42.

As shown in fig. 1 to 3, the pulley belt 20 is used for driving the curtain 10 to wind and unwind. In this embodiment, a set of pulley belts 20 is disposed on each of the upper and lower sides of the curtain 10. The pulley belt 20 is connected to the edge of the curtain 10 by the curtain clamp 60, so that the pulley belt 20 is connected to the upper and lower edges of the curtain 10 by the curtain clamp 60. The pulley belt 20 is generally elongated and has a length that is related to the length of the curtain 10. One end of the pulley belt 20 is connected with the pulley belt 20 of the first winding shaft 41, the other end is connected with the conveyor belt 30, and the conveyor belt 30 is connected with the second winding shaft 42 by bypassing the third winding shaft 43 at the far end, so that a conveying structure is formed between the pulley belt 20 and the conveyor belt 30, and thus, when the first winding shaft 41 rotates, the pulley belt 20 can wind around the first winding shaft 41, and the curtain 10 can be driven to wind around the first winding shaft 41; when the second winding shaft 42 rotates, the transmission belt 30 can wind around the second winding shaft 42, and when the transmission belt 30 winds around the second winding shaft 42, the pulley belt 20 can be unwound under the traction of the transmission belt 30, so as to drive the curtain 10 to unwind along the direction of the distal third winding shaft 43.

In order to prevent the curtain 10 from collapsing down when being rolled, the pulley belt 20 is designed by an articulated structure. Specifically, as shown in fig. 7 and 8, the pulley belt 20 includes a plurality of pulley belt units 21 hinged to each other, and each of the pulley belt units 21 is hinged to each other and has an elongated shape. A curtain clip 60 is connected to one end of the belt unit 21 facing the curtain 10. The number relationship between the belt pulley units 21 and the curtain clamps 60 can be set according to requirements, and in some embodiments, one curtain clamp 60 can be connected to one end of each belt pulley unit 21, so that the number of the belt pulley units 21 to the curtain clamps 50 is 1: 1. In some embodiments, one curtain clip 60 may be connected to the pulley belt 20 at intervals of several pulley belt units 21, for example, one curtain clip 60 is installed between every two pulley belt units 21, so that the ratio of the pulley belt units 21 to the curtain clips 50 is 2: 1. In order to ensure the smoothness of the curtain 10, in this embodiment, it is preferable to install one curtain clamp 60 every other one of the belt pulley units 21, so that one belt pulley unit 21 is not connected with the curtain clamp 60 between every two curtain clamps 60, so that the third sliding wheel 215 is connected to the belt pulley unit 21 of the non-connected curtain clamp 60, and the movement can be limited to ensure the smoothness of the sliding.

The curtain clamp 60 can be a known curtain clamp 60, which can clamp the curtain 10 to maintain the curtain 10 in a tensioned state. The connection between the curtain clamp 60 and the belt pulley unit 21 can refer to the known technology. The articulation between the belt units 21 provides the belt units 21 with rotational freedom to allow the entire pulley belt 20 to be wound. As shown in fig. 7 to 9, in order to prevent the pulley belt 20 from being apt to collapse by gravity when the entire pulley belt 20 is wound together, positioning protrusions 22 and positioning grooves 23 are provided on opposite side surfaces of each pulley belt unit 21, respectively. The shape and size of the positioning convex part 22 are matched with the shape and size of the positioning groove 23; as shown in fig. 9, when the belt units 21 are stacked together, the positioning protrusions 22 of one of the belt units 21 can be fitted into the positioning grooves 23 of the other belt unit 21 so that the two stacked belt units 21 can be supported by each other while being maintained at the same height to prevent the belt units 21 from collapsing downward, so that, when the pulley belt 20 is wound up around the first reel 41, the positioning protrusions 22 of the respective belt units 21 can be fitted into the positioning grooves 23 stacked thereon, respectively, so that the entire pulley belt 20 can be wound together without collapsing downward.

As shown in fig. 1 and 4, a guide 70 is provided in the direction of the curtain 10 to ensure the flatness of the curtain 10 when it is unfolded and to prevent the curtain 10 from collapsing downward when it is unfolded. The guide rails 70 are used to restrain the movement of the pulley belts 20 and to support the pulley belts 20 so that the curtain 10 can be unfolded in a predetermined direction and kept flat without being laid down. The shape of the guide rails 70 can be set as desired, which can constrain the deployed shape of the curtain 10. In other words, the guide 70 determines whether the curtain 10 is stretched out in a plane or in a non-plane. For example, when the guide 70 is a linear guide, the pulley belt 20 moves linearly as a whole when moving along the guide 70, so that the curtain 10 is spread out in a flat shape. For another example, when the guide rail 70 is a curved guide rail, the sliding path provided by the guide rail is curved, and the curtain will be curved when unfolded. In short, by providing the guide rail 70 with a corresponding shape, the shape of the curtain 10 can be restrained, so that various types of curtain effects such as a planar curtain and a non-planar curtain can be realized to meet various use requirements. For convenience of description, in the present embodiment, the guide rail 70 is exemplified by a linear guide rail 70, and in other embodiments, the structure of the present embodiment may be modified.

In this embodiment, as shown in fig. 1, two sets of the guide rails 70 are provided, and are respectively and symmetrically disposed on the upper and lower sides of the curtain 10. The length of the guide 70 is related to the length of the curtain 10. The guide rail 70 may be a single integral rail, or may be formed by splicing a plurality of guide rails 70 together. When the length of the curtain 10 is long, the guide rails 70 can be spliced together by using multiple sections of guide rails 70 for convenient carrying. When the length of the curtain 10 is short, the requirement can be satisfied by selecting one whole rail. One end of the guide 70 is close to the first roller 41, and the other end extends to a far end, which is a free end 71, along the unwinding direction of the curtain 10. In actual installation, a substantial portion of the rail 70 is located outside of the first and second fastener assemblies 91, 92.

As shown in fig. 5 and 10, the guide rail 70 is provided with a first cavity 72 and a second cavity 73 which are parallel to each other. The first cavity 72 is mainly used for restricting precession limiting movement of the pulley belt 20, and the second cavity 73 is used for providing a transmission space for the conveyor belt 30. The first cavity 72 and the second cavity 73 extend in the longitudinal direction of the rail 70, and extend from one end of the rail 70 to the other end thereof. The first cavity 72 and the second cavity 73 may be through or completely separated. In this embodiment, the first cavity 72 and the second cavity 73 are isolated. The second cavity 73 is sized and shaped internally to facilitate passage of the conveyor belt 30. The first cavity 72 has an internal size that facilitates passage of the pulley belt 20 therethrough, and the first cavity 72 has an internal shape that supports and constrains movement of the pulley belt 20.

In this embodiment, as shown in fig. 5, in order to support the pulley belt 20 and restrain the pulley belt 20 from moving, a first guide groove 724 is provided inside the first cavity 72, and first sliding wheels 213 matched with the first guide groove 724 are respectively provided on the pulley belt units 21 of the pulley belt 20. The first guide groove 724 extends along the length direction of the guide rail 70, and in this embodiment, a first guide groove 724 is disposed at the other end of the first cavity 72 opposite to the curtain clamp 60. Correspondingly, first pulleys 213 are connected to the end portions of the pulley belts 20 opposite to the curtain clips 60. The end surface of the first sliding wheel 213 is perpendicular to the curtain 10, the size of the first sliding wheel 213 is matched with the size of the first guiding groove 724, and the first sliding wheel 213 is located in the first guiding groove 724 and can move along the first guiding groove 724, so that the moving direction of the pulley belt 20 can be restricted, and the pulley belt 20 can be prevented from being deviated. To support the pulley belt 20, the pulley belt 20 may be restrained within the first cavity 72 such that the pulley belt 20 cannot be removed from the first cavity 72, thereby ensuring support for the pulley belt 20. In particular, the internal shape of the first cavity 72 may be configured as desired to provide support. In this embodiment, vertical supporting portions 721 are respectively disposed on two opposite inner walls of the first cavity 72, and ends of the supporting portions 721 are spaced relatively, so as to form a structure having a supporting function and a limiting function. The support portion 721 has a length corresponding to that of the guide rail 70, and extends from one end of the guide rail 70 to the other end. The supporting portion 721 is spaced opposite to the first guide groove 724, and divides the first cavity 72 into two through spaces: a first confinement cavity 722 and a first open cavity 723. The first limiting cavity 722 can limit the pulley belt 20 from falling out, thereby playing a role in restraining and supporting. Further, a second guide groove 725 is formed at a portion of the support portion 721 opposite to the first guide groove 724 to facilitate smooth movement of the pulley belt 20. The second guide slot 725 is spaced parallel to the first guide slot 724. The second guide groove 725 forms a step with the end of the support portion 721 to also serve as a limit support. An opening 74 is disposed at an end of the first open cavity 723 opposite to the support portion 721, and the opening 74 faces the curtain 10. The opening 74 extends in the longitudinal direction of the rail 70, and penetrates from one end of the rail 70 to the other end. The opening 74, the second guide slot 725, and the first guide slot 724 are respectively spaced in parallel, wherein the first guide slot 724 is located at the position farthest from the curtain 10, the opening 74 is located at the position closest to the curtain 10, and the second guide slot 725 is located between the opening 74 and the first guide slot 724.

Accordingly, in this embodiment, as shown in fig. 5, the pulley belt units 21 of the pulley belt 20 respectively include a first main body portion 211 located in the first limiting cavity 722, a second main body portion 212 located in the first open cavity 723, and a plurality of sliding wheels connected thereto. The first body portion 211 and the second body portion 212 are integrally formed, and a positioning protrusion 22 and a positioning groove 23 are respectively disposed on two side surfaces of the first body portion 211 and the second body portion 212. A first slide wheel 213 is connected to an end of the first body 211, and the first slide wheel 213 is fitted into the first guide groove 724. A second slide wheel 214 is coupled to the first body portion 211 at a position close to the second body portion 212, and the second slide wheel 214 is fitted into the second guide groove 725. In this embodiment, the second sliding wheels 214 are connected to two side surfaces of the middle portion of each belt unit 21, end surfaces of the second sliding wheels are parallel to the curtain 10, and the second sliding wheels abut against the second guide grooves 725 and can move along the second guide grooves 725, so as to further restrict the movement of the pulley belts 20, support the pulley belts 20, and ensure the movement stability of the pulley belts 20. In this embodiment, a plurality of curtain clips 60 are connected to the end of the second body 212 at intervals, and a plurality of third sliding wheels 215 are connected to the end not connected to the curtain clips 60, wherein the third sliding wheels 215 are parallel to the first guide wheel 101 and are respectively located at two opposite ends of the belt unit 21. The size of the third sliding wheel 215 is matched with the size of the opening 74, and the circumferential surface of the third sliding wheel 215 abuts against the inner wall of the opening 74, so that the third sliding wheel 215 can perform limited movement along the extending direction of the opening 74, and the sliding stability and the unfolding stability of the curtain 10 are further ensured. Through the pulley and guide way and opening, alright guarantee that pulley belt 20 carries out steady removal along guide rail 70 direction to guarantee not off normal, not down the couch.

As shown in fig. 1, the third reel 43 is located at the free end 71 of the guide rail 70, which is parallel to the first and second reels 41, 42. The third reel 43 is used for driving the belt 30 to turn. The length of the third reel 43 can be set as required, and the length can be consistent with the length of the first reel 41 or the width of the conveyor belt 30. The third reel 43 may be stationary or rotatable. When the third reel 43 rotates, it can be driven by the driving device 50.

As shown in fig. 2 and 3, the connection modes of the pulley belt 20, the conveyor belt 30, the guide rail 70 and the third reel 43 are as follows: one end of the pulley belt 20 is connected to the first reel 41, and the other end of the pulley belt 20 passes through the first cavity 72 of the guide rail 70 to be connected to one end of the conveyor belt 30; the other end of the belt 30 is routed around the third spool 43 and through the second cavity 73 of the guide 70 to connect with the second spool 42.

The belt 30 is used to pull the pulley belt 20, and the specific material thereof may be set according to the requirement, for example, it may be a thin transparent thin belt.

As shown in fig. 2 to 4, in order to prevent the pulley belt 20 from loosening, derailing and deviating during rolling, a tension pinch roller device 80 is further disposed in the first fixing member assembly 91 and the second fixing member assembly 92. The tensioning pinch roller device 80 is arranged on the periphery of the rolled pulley belt 20, and can swing along with the rolling size of the pulley belt 20 and press the pulley belt 20 tightly. The tension pinch roller device 80 includes a plurality of swinging pressing members 81 and a plurality of springs. One end of the swing presser 81 is rotatably connected to the first fixing member assembly 91 and the second fixing member assembly 92, and a torsion spring is provided between the connection points; the other end of the swinging pressing piece 81 is a free end 71, and a pressing wheel 82 is arranged on the end part of the swinging pressing piece. The free end 71 of the oscillating presser 81 is pressed against the pulley belt reel 412 by the torsion spring. When the pulley belt 20 is wound around the pulley belt reel 412, the swinging presser 81 swings to the outer periphery along with the surface of the pulley belt 20 and presses against the surface of the pulley belt 20 by the torsion spring, so that the entire pulley belt 20 is not loosened.

As shown in fig. 2 and 3, in order to guide the transmission path of the pulley belt 20 to transmit along the guide rail 70, a guide pulley set 100 is provided between the first fastener assembly 91 and the second fastener assembly 92. The guide wheel assembly 100 has two sets, one set is disposed between the first inner fixing member 912 and the first outer fixing member 911, and the other set is disposed between the second inner fixing member 922 and the second outer fixing member 921. The guide roller set 100 is positioned between the first reel 41 and the entrance of the guide rail 70, and guides the traveling direction of the pulley belt 20 and tensions the pulley belt 20. In this embodiment, the guide pulley set 100 includes a plurality of first guide pulleys 101 and a plurality of second guide pulleys 102 that are disposed at intervals, and a space between the first guide pulleys 101 and the second guide pulleys 102 is used for the pulley belt 20 to pass through. The pulley belt 20 extends from the first spool 41 through the space between the first guide pulley 101 and the second guide pulley 102 into the first cavity 72 of the guide rail 70.

Further, as shown in fig. 4, in order to facilitate the curtain 10 to be rolled up with the pulley belt 20, the first inner fixing member 912 and the second inner fixing member 922 may be further provided with an introduction hole 94 and a through hole 96, respectively. The through hole 96 is opposite in position and matched with the shape and position of the curtain 10 after being rolled, in this embodiment, the through hole 96 is a circular hole, and the center of the through hole is consistent with the center of the first winding shaft 41. Both ends of the first winding shaft 41 are respectively connected to the first outer fixing member 911 and the second outer fixing member 921 through the through holes 96. One end of the introduction hole 94 penetrates the through hole 96, and the other end thereof corresponds to the position of the opening 74 of the guide rail 70.

As shown in fig. 4, to facilitate mounting the guide rail 70 such that the guide rail 70 is mounted in a suitable position for use with the pulley belt 20, the first and second fastener assemblies 91 and 92 are provided with docking bayonets 93. The shape of the docking bay 93 may be set as desired, which may facilitate the insertion of the guide rail 70 into the docking bay 93 for positioning. In this embodiment, when the guide rail 70 is positioned with the first fastener assembly 91 and the second fastener assembly 92, one end of the guide rail 70 is positioned inside the first fastener assembly 91 and the second fastener assembly 92, and the other end, i.e., the free end 71, extends to the distal end.

In order to enhance the overall appearance, a cover (not shown) may be disposed between the first fixing element assembly 91 and the second fixing element assembly 92, and the first fixing element assembly 91, the second fixing element assembly 92, the first reel 41, the second reel 42, the driving device 50, the tension roller device 80, and the guide wheel set 100 are covered by the cover, so that a part of the guide rail 70 is located in the cover, and the rest of the guide rail 70 is located outside the cover. In order to facilitate the rolling and unfolding of the curtain 10, a curtain outlet is arranged on the part of the outer cover consistent with the rolling path of the curtain 10; when the curtain 10 is completely rolled, the curtain 10 is hidden in the outer cover; when the curtain 10 is deployed, the curtain 10 is deployed outwardly along the exit of the curtain 10. The outlet of the curtain 10 can be set according to the known technology, and can be set according to the requirement.

By this, just formed the utility model discloses an electronic projection screen of horizontal rolling: a first reel 41 and a second reel 42 are connected between the first fixing component 91 and the second fixing component 92, a driving device 50 is installed on the first reel 41 and the second reel 42, and the first reel 41 and the second reel 42 can rotate under the action of the driving device 50; the curtain 10 is arranged between the first fixing component 91 and the second fixing component 92, and the upper and lower edges of the curtain 10 are respectively connected with the pulley belt 20 through the curtain clamp 60; the pulley belt 20 is connected at one end to the first reel 41 and at the other end to the belt 30 via the guide pulley set 100 and the first cavity 72 of the guide rail 70, and the belt 30 is connected at the other end to the second reel 42 bypassing the third reel 43 at the free end 71 of the guide rail 70 and via the second cavity 73 of the guide rail 70.

When the transversely-rolled electric projection screen of the utility model is processed, the first fixing component 91, the second fixing component 92, the driving device 50, the curtain 10, the first reel 41, the second reel 42, the pulley belt 20, the conveyor belt 30, the guide wheel group 100 and the tension pinch roller device 80 are assembled into a whole in advance, and the whole is a main body component of the transversely-rolled electric projection screen; the rail 70 and the third reel 43 are then installed on site. When the projection screen is installed, the main body member of the electric projection screen which is horizontally rolled up is vertically fixed on a wall, then the guide rail 70 is inserted into the butt bayonet 93 of the main body member along the horizontal direction, and then the guide rail 70 is horizontally fixed on the wall. The third reel 43 may then be fixed at the free end 71 of the rail 70 after the rail 70 is mounted. Since the conveyor belt 30 and the pulley belt 20 need to pass through the guide rail 70, before the guide rail 70 is inserted into the docking bay 93, the conveyor belt 30 is connected to the pulley belt 20 through the second cavity 73 of the guide rail 70, and then the guide rail 70 is inserted into the docking bay 93. When the transversely rolled electric projection screen is installed, the curtain 10 can be rolled and unfolded along the length direction of the curtain 10.

The utility model discloses an electronic projection screen's of horizontal rolling principle does: when the driving device 50 drives the first reel 41 to rotate, the pulley belt 20 starts to rotate around the first reel 41 because one end of the pulley belt 20 is connected with the first reel 41; the curtain 10 is connected between the two sets of pulley belts 20, and when the pulley belts 20 rotate around the first winding shaft 41, the curtain 10 rotates around the first winding shaft 41 synchronously, so that the curtain 10 is wound on the first winding shaft 41 between the first fixing member assembly 91 and the second fixing member assembly 92. Although the pulley belts 20 are disposed on the upper and lower sides of the curtain 10, since the pulley belt units 21 of the pulley belt 20 are respectively provided with the positioning protrusions 22 and the positioning grooves 23, when the pulley belt 20 is rolled up, the pulley belt units 21 are stacked together, and the positioning protrusions 22 can be inserted into the positioning grooves 23 of another pulley belt unit 21 stacked together, so that the pulley belt units 21 can be supported by each other to ensure that the pulley belt 20 is not laid down when rolled up, thereby ensuring that the curtain 10 is in a tensioned state without collapsing.

The utility model discloses an electronic projection screen's of horizontal rolling expansion principle does: when the driving device 50 drives the second reel 42 to rotate, the conveyor belt 30 starts to rotate around the second reel 42 because one end of the conveyor belt 30 is connected with the second reel 42; as the conveyor belt 30 winds around the second reel 42, the pulley belt 20 connected to the conveyor belt 30 is pulled by the conveyor belt 30 to be conveyed toward the third reel 43; when the pulley belts 20 are transported toward the third roller 43, the curtain 10 is synchronously unfolded toward the third roller 43, so as to realize the unfolding of the curtain 10. In the process, because the pulley belt 20 moves along the guide rail 70 in a limiting manner, and the pulley belt 20 is supported and restrained by the guide rail 70, the curtain 10 can be ensured to be unfolded stably and to be unfolded smoothly, and the curtain 10 and the pulley belt 20 can be prevented from collapsing due to gravity.

The utility model discloses an electronic projection screen of horizontal rolling, its curtain 10 carries out horizontal rolling along length direction, and rolling about the direction of height is not gone on, therefore the overall dimension after its rolling mainly is highly relevant with curtain 10, and to jumbo size curtain 10, it is length very much more than highly usually, therefore, use this kind of mode to carry out the rolling, can be so that the overall dimension after the rolling is less than traditional electronic projection screen who carries out rolling about the direction of height greatly, therefore it does benefit to whole transport and does not receive the size restriction. Furthermore, the utility model discloses a pulley belt 20 and guide rail 70 restrain the expansion and the rolling of curtain 10, and it not only can guarantee the tensioning of curtain 10, and the effect of non-planar curtain 10 such as curved surface curtain 10 is realized to the shape of accessible guide rail 70 moreover, and its actual application scope is wider. The utility model discloses an electronic projection screen of horizontal rolling, its reducible overall dimension not only does benefit to transport and installation, can guarantee the tensioning of curtain 10 and the roughness after the expansion moreover, and its range of application is very extensive, and it has very strong practicality.

While the invention has been described with reference to the above embodiments, the scope of the invention is not limited thereto, and the above components may be replaced with similar or equivalent elements known to those skilled in the art without departing from the concept of the invention.

Claims (14)

1. The electric projection screen capable of being transversely rolled comprises a curtain (10), a reel and a driving device (50), and is characterized by further comprising pulley belts (20) and guide rails (70), wherein the reel is vertically arranged, the pulley belts (20) are connected to the edges of the upper end and the lower end of the curtain (10), the guide rails (70) are arranged in parallel at intervals and transversely extend, and the pulley belts (20) can be driven by the driving device (50) to move in a limiting manner along the guide rails (70) to transversely expand the curtain (10); the pulley belt (20) can be driven by the driving device (50) to wind around the reel so as to transversely wind the curtain (10).

2. The laterally rolled electric projection screen according to claim 1, further comprising a conveyor belt (30), wherein the reels include a first reel (41), a second reel (42), and a third reel (43), the first reel (41), the second reel (42), and the third reel (43) are disposed in parallel at intervals, and the first reel (41) and the second reel (42) are respectively connected to the driving device (50) to be rotatable; the third reel (43) is located at the other end of the guide rail (70) opposite to the first reel (41); the pulley belt (20) is arranged on the upper side and the lower side of the curtain (10) in the height direction, and is connected with the edge of the curtain (10) through a curtain clamp (60), the extending direction of the pulley belt (20) is consistent with the length direction of the curtain (10), one end of the pulley belt (20) is connected with the first reel (41), the other end of the pulley belt (20) is connected with the conveyor belt (30), the other end of the conveyor belt (30) bypasses a third reel (43) at the far end and is connected with the second reel (42), and when the driving device (50) drives the first reel (41) to rotate, the pulley belt (20) winds around the first reel (41) to drive the curtain (10) to transversely wind around the first reel (41); when the driving device (50) drives the second reel (42) to rotate, the transmission belt (30) winds the second reel (42) to pull the pulley belt (20), so that the curtain (10) is driven to be transversely unfolded.

3. The laterally rolled electric projection screen of claim 2, wherein the drive means (50) comprises a first drive motor (51) and a second drive motor (52), the first drive motor (51) being drivingly connected to the first roller (41) and being capable of driving the first roller (41) in rotation; the second driving motor (52) is in driving connection with the second reel (42) and can drive the second reel (42) to rotate.

4. The laterally rolled electric projection screen according to claim 2, wherein the drive means (50) comprises a third drive motor (53) and a first one-way bearing (54) and a second one-way bearing (55) connected to the third drive motor (53), the first one-way bearing (54) being in driving connection with the first roller (41) and the second one-way bearing (55) being in driving connection with the second roller (42); when the third driving motor (53) rotates forwards or backwards, the first one-way bearing (54) rotates to drive the first reel (41) to rotate; when the third driving motor (53) rotates reversely or forwardly, the second one-way bearing (55) rotates to drive the second reel (42) to rotate.

5. The laterally rolled electric projection screen of claim 2, wherein a tension roller device (80) that can swing and press the pulley belt (20) according to the rolling size of the pulley belt (20) is provided at the periphery of the pulley belt (20) rolled around the first roll (41).

6. The transversely-rolled electric projection screen according to claim 2, wherein the pulley belt (20) comprises a plurality of belt units (21) hinged to each other, each belt unit (21) is hinged to each other to form a long belt shape, a curtain clip (60) is connected to one end of each belt unit (21) or a plurality of belt units (21) facing the curtain (10), positioning protrusions (22) and positioning grooves (23) are respectively arranged on the two side surfaces of each belt unit (21), the shape and size of the positioning protrusions (22) are matched with the shape and size of the positioning grooves (23), and when the pulley belt (20) is rolled around the first reel (41), the positioning protrusions (22) of each belt unit (21) are respectively embedded into the positioning grooves (23) of the belt units (21) overlapped with the positioning protrusions.

7. The transversely-rolled electric projection screen according to claim 6, wherein the guide rail (70) is provided with a first cavity (72) and a second cavity (73) which are parallel to each other, the first cavity (72) and the second cavity (73) respectively extend along the length direction of the guide rail (70), a limiting groove for limiting the pulley belt (20) to move along the length direction of the guide rail (70) is arranged in the first cavity (72), an opening (74) is arranged in the first cavity (72) in the direction towards the curtain (10), and the opening (74) penetrates from one end of the guide rail (70) to the other end of the guide rail (70); one end of the conveyor belt (30) is connected to the second reel (42) by passing around the third reel (43) and through the second cavity (73).

8. The laterally rolled electric projection screen according to claim 7, wherein a sliding wheel is provided on each belt unit (21), the sliding wheel being matched with the stopper groove.

9. The transversely rolled electric projection screen according to claim 7, wherein vertical supporting portions (721) are respectively disposed on the inner walls of the two opposite sides of the first cavity (72), the supporting portions (721) divide the first cavity (72) into a first limiting cavity (722) and a first open cavity (723) which are communicated with each other, the opening (74) is disposed on the side of the first open cavity (723) facing the curtain (10), and a first guide groove (724) and a second guide groove (725) are respectively disposed on the inner walls of the first limiting cavity (722) opposite to the opening (74); the belt pulley unit (21) comprises a first main body part (211), a second main body part (212), a first sliding wheel (213) and a second sliding wheel (214), wherein the first main body part (211) and the second main body part (212) are integrally or fixedly connected, the first main body part (211) is limited in the first limiting cavity (722), and the second main body part (212) is positioned in the first open cavity (723); a first sliding wheel (213) and a second sliding wheel (214) are respectively arranged at two ends of the first main body part (211), the first sliding wheel (213) is matched with the first guide groove (724), and the second sliding wheel (214) is matched with the second guide groove (725).

10. The transversely rolled motorized projection screen of claim 9, wherein the fabric clips (60) are spaced apart between the belt units (21), and a third pulley (215) is attached to the end of the belt unit (21) between two adjacent fabric clips (60), the third pulley (215) engaging the opening (74) and being movable along the opening (74) in a limited manner.

11. The laterally rolled motorized projection screen of claim 2, comprising a first fastener assembly (91) and a second fastener assembly (92) spaced apart from each other, the first roller (41) and the second roller (42) being vertically connected between the first fastener assembly (91) and the second fastener assembly (92); the first fixing piece assembly (91) comprises a first outer fixing piece (911) and a first inner fixing piece (912) which are arranged at intervals, the second fixing piece assembly (92) comprises a second outer fixing piece (921) and a second inner fixing piece (922), and two ends of the first reel (41) are connected to the first outer fixing piece (911) and the second outer fixing piece (921) respectively; the curtain (10) is arranged between the first inner fixing piece (912) and the second inner fixing piece (922); the pulley belt (20) is arranged between the first outer fixing piece (911) and the first inner fixing piece (912) and between the second outer fixing piece (921) and the second inner fixing piece (922); one end of the guide rail (70) is respectively arranged between the first outer fixing piece (911) and the first inner fixing piece (912) and between the second outer fixing piece (921) and the second inner fixing piece (922), and the other end of the guide rail (70) extends out of the first fixing piece assembly (91) and the second fixing piece assembly (92) to form a free end (71); the third reel (43) is provided at a free end (71) of the guide rail (70).

12. The laterally rolled electric projection screen of claim 11, wherein the first fastener assembly (91) and the second fastener assembly (92) are respectively provided with a docking bayonet (93) for aligning with the guide rail (70).

13. The transversely rolled electric projection screen according to claim 11, wherein an introduction hole (94) is provided in each of the first inner fixing member (912) and the second inner fixing member (922), one end of the introduction hole (94) corresponding to the position of the opening (74) at the end of the guide rail (70), and the other end of the introduction hole (94) facing the first winding shaft (41).

14. The laterally wound and motorized projection screen of claim 11, wherein a guide pulley set (100) is disposed inside each of the first fixing member assembly (91) and the second fixing member assembly (92), the guide pulley set (100) is disposed between the first winding shaft (41) and the entrance of the first cavity (72), the guide pulley set (100) includes a first guide pulley (101) and a second guide pulley (102) which are disposed at an interval, and the pulley belt (20) passes between the first guide pulley (101) and the second guide pulley (102) to extend into the first cavity (72) of the guide rail (70) when driven.

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