CN220171397U - Portable folding outdoor projection curtain - Google Patents

Abstract

A portable folding outdoor projection curtain comprises a storage box, a bracket, a shear blade carrier and a rolling piece; the storage box is internally provided with an accommodating cavity with an outward opening; the bracket is movably arranged in the accommodating cavity and can enter and leave the opening of the accommodating cavity; the scissors frame is arranged on the bracket and can be contracted or expanded; the two rolling parts are symmetrically arranged on the shear rest to roll two sides of the curtain respectively; under the conventional condition, the scissors frame is contracted and positioned in the accommodating cavity, and the two rolling pieces are mutually closed to roll the curtain, so that the overall size is smaller, and the portable folding device is convenient to carry out; when the projection device is used, the movable support drives the scissor frame to move out of the accommodating cavity, and then the scissor frame is expanded to drive the two rolling pieces to be away from each other, and in the process, the curtains in the two rolling pieces are pulled out and gradually spread so as to facilitate projection; the expansion range of the shear rest can be adjusted, so that the size of the curtain can be adjusted; and because the two sides of the curtain are limited by the two rolling pieces, the stability of the curtain can be improved.

Description

Portable folding outdoor projection curtain

Technical Field

The utility model belongs to the technical field of projection equipment, and particularly relates to a portable folding outdoor projection curtain.

Background

With the continuous development of intelligent projectors, outdoor projection gradually forms tide; however, the projection curtain on the market needs to be assembled and built, and the assembly parts are more, which is not beneficial to outdoor carrying and use.

Therefore, the utility model with the application number of 2021214767086 is a portable projection curtain, wherein the support assembly is arranged in the placement box for collecting and releasing the curtain, and the roller is arranged at the bottom of the placement box for increasing the flexibility, so that the portability is improved; however, in practical use, the portable projection curtain has the following disadvantages:

firstly, the size of the curtain cannot be adjusted, so that the use experience is affected;

secondly, the curtain is easy to shake due to the influence of wind after being unfolded, and the stability is poor.

Disclosure of Invention

(one) solving the technical problems

The utility model provides a portable folding outdoor projection curtain, which can adjust the use size of the curtain and improve the stability of the curtain.

(II) technical scheme

In order to achieve the above purpose, the present utility model provides the following technical solutions:

a portable folding outdoor projection curtain comprises a storage box, a bracket, a shear blade carrier and a rolling piece; the storage box is internally provided with an accommodating cavity which is opened outwards; the bracket is movably arranged in the accommodating cavity and can enter and leave an opening of the accommodating cavity; the scissors frame is arranged on the bracket and can be contracted or expanded; the two rolling parts are symmetrically arranged on the shear knife rest to roll two sides of the curtain respectively; when the scissors frame is contracted, the two rolling parts are mutually close and can move along with the bracket to enter and exit the accommodating cavity; when the scissors frame expands, the two rolling pieces are far away from each other to prop open the curtain.

Preferably, a baffle is arranged on the bracket and is abutted against the back surface of the curtain.

Preferably, the scissors frame comprises a screw motor, a fixed rod and a plurality of connecting rods; the connecting rods are mutually hinged and interweaved to form a folding net, and the middle part of the folding net is arranged on the bracket; the screw rod motor is arranged on the bracket and is in driving connection with the folding net so as to drive the folding net to shrink or expand; the fixing rods are arranged at two sides of the folding net and symmetrically arranged, and the two rolling parts are respectively arranged on the two fixing rods.

Preferably, the winding member includes a spool, a rotating lever and a return spring; the winding drum is arranged on the shear rest, and a winding groove communicated with the outside is formed in the winding drum; the rotating rod is rotatably arranged in the winding drum, a hook is arranged on the rotating rod, and the side of the curtain penetrates through the winding groove to the inside of the winding drum and is connected with the hook; the return spring is sleeved on the rotating rod, and is in a normal state when the scissor frame is contracted, and is in an energy storage state when the scissor frame is expanded.

Preferably, the device further comprises a driving mechanism, wherein the driving mechanism is installed in the accommodating cavity and is in driving connection with the support, so that the support is driven to move, and the two rolling pieces can enter and exit the opening of the accommodating cavity.

Preferably, the driving mechanism comprises a gear box, a driving motor and a screw rod, wherein the gear box is installed in the accommodating cavity, and the driving motor is in driving connection with the input end of the gear box; the screw rod is in driving connection with the output end of the gear box, extends along the opening direction of the accommodating cavity and is in threaded connection with the support.

Preferably, the folding device further comprises a box cover, wherein the box cover is provided with two box covers which are symmetrically hinged on the storage box, and the two box covers can be mutually closed or mutually far away so as to close or open the opening of the accommodating cavity, and then the folding piece is enclosed or exposed.

Preferably, the box cover further comprises a carrier plate, bayonets are arranged on the two box covers, and when the two box covers are mutually closed, the two bayonets are mutually enclosed to form a clamping groove; the carrier plate can be arranged on the storage box in a swinging way, can be attached to or away from the storage box, and is also provided with a projector; when the carrier plate is attached to the storage box, the projector is clamped into the clamping groove; when the carrier plate is far away from the storage box, the projector is separated from the clamping groove and can correspond to the curtain.

Preferably, the storage box further comprises a fixing foot piece, wherein the fixing foot piece is movably installed on the storage box and can be abutted against the ground or stored on the storage box.

Preferably, the fixing leg member is provided with a plurality of fixing leg members and is respectively arranged at each side line of the storage box.

Preferably, a hidden groove is arranged on the storage box, and the fixed foot piece comprises a fastening seat, a foot rod, a swing arm and a lock catch; the fastening seat is arranged in the hidden groove, one end of the foot rod is hinged with the fastening seat, and the foot rod body is provided with a sliding groove; the first end of the swing arm is hinged with the fastening seat, and the second end of the swing arm is provided with a sliding column which is in sliding connection with the sliding groove, so that the foot rod is provided with a first position which is accommodated in the hidden groove and a second position which is in overturning abutting connection with the ground; the lock catch is hinged to the foot rod, and when the foot rod is in the second position, the lock catch can lock the sliding column in the sliding groove.

Preferably, a handle is also installed on the storage box.

Preferably, universal wheels are arranged at the bottom of the storage box.

(III) beneficial effects

According to the portable folding outdoor projection curtain, the movable support is arranged in the storage box and used for driving the scissor rest and the rolling piece to enter and exit the accommodating cavity, so that the portable folding outdoor projection curtain is convenient to carry out and use outdoors; the scissors frame with the adjustable expansion range is designed, so that a user can conveniently adjust the size of the curtain according to the use requirement, and the use experience is improved; and because two rolling-up parts are installed respectively in the both sides of scissor rest and synchronous restriction curtain's both sides, consequently can be simultaneously for the support of the provision of curtain, avoid the curtain to be rocked by the influence of wind after expanding, improved the stability of curtain.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate and together with the embodiments of the utility model and do not constitute a limitation to the utility model, and in which:

FIG. 1 shows a first use state diagram of the present utility model;

FIG. 2 shows a second use state diagram of the present utility model;

FIG. 3 shows a rear view of FIG. 2;

FIG. 4 shows a cross-sectional view A-A of FIG. 3;

FIG. 5 shows an enlarged view at A in FIG. 4;

FIG. 6 shows a third use state diagram of the present utility model;

FIG. 7 shows a schematic view of the structure of the storage box and the box cover of the present utility model;

FIG. 8 shows a schematic structural view of the carriage, scissor carrier and retractor of the utility model;

FIG. 9 shows a schematic structural view of the drive mechanism and carriage of the present utility model;

FIG. 10 shows a schematic structural view of the retractor of the utility model;

FIG. 11 shows a cross-sectional view B-B of FIG. 10;

FIG. 12 shows an enlarged view at B in FIG. 11;

FIG. 13 shows an exploded view of the retractor of the utility model;

FIG. 14 shows a schematic structural view of the fixing leg of the present utility model;

fig. 15 shows a schematic view of the state of use of the latch of the present utility model.

In the figure: the P curtain, 1 storage box, 10 holding cavity, 11 hidden groove, 12 handle, 13 universal wheels, 2 support, 21 baffle, 3 scissor rack, 31 lead screw motor, 32 dead lever, 33 connecting rod, 330 folding net, 4 roll-up piece, 41 reel, 410 roll-up groove, 42 bull stick, 420 couple, 43 reset spring, 5 actuating mechanism, 51 gear box, 52 driving motor, 53 screw rod, 6 case lid, 60 bayonet socket, 600 draw-in groove, 7 carrier plate, 8 projecting apparatus, 9 fixed foot spare, 91 fastening seat, 92 foot pole, 92h spout, 93 swing arm, 93h slide post, 94 hasp.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 to 6, a portable folding outdoor projection curtain comprises a storage box 1, a bracket 2, a scissor frame 3 and a rolling piece 4; the storage box 1 is internally provided with an accommodating cavity 10 which is opened outwards; the bracket 2 is movably arranged in the accommodating cavity 10 and can enter and leave the opening of the accommodating cavity 10; the shear rest 3 is arranged on the bracket 2 and can be contracted or expanded; the two rolling pieces 4 are symmetrically arranged on the scissors frame 3 to roll two sides of the curtain P respectively; wherein, when the scissors frame 3 is contracted, the two rolling pieces 4 are mutually close and can move along with the bracket 2 to enter and exit the accommodating cavity 10; when the shear blade holder 3 expands, the two rolling members 4 are away from each other to open the curtain P.

Specifically, under the conventional condition, the bracket 2 is positioned in the accommodating cavity 10, the scissor frame 3 is contracted on the bracket 2, and the two rolling pieces 4 are mutually close to roll the curtain P, at the moment, all the components are concentrated in the storage box 1, so that the overall size is small, and the carrying is convenient for going out;

when the curtain P is needed to be used, the storage box 1 is fixed on a plane, then the movable support 2 drives the scissor rest 3 to move out of the accommodating cavity 10, and then drives the scissor rest 3 to expand so as to drive the two rolling pieces 4 to be away from each other, in the process, the curtain P in the two rolling pieces 4 is pulled out until the curtain P is unfolded to a proper size, and then projection can be carried out; in addition, during use, the user can also adjust the size of the curtain P by adjusting the expansion range of the scissor rest 3.

In summary, the movable bracket 2 is arranged in the storage box 1 and is used for driving the scissor rest 3 and the rolling piece 4 to enter and exit the accommodating cavity 10, so that the storage box is convenient to carry out and use outdoors; the scissors frame 3 with adjustable expansion range is designed, so that a user can conveniently adjust the size of the curtain P according to the use requirement, and the use experience is improved; and because two roll-up pieces 4 are installed respectively in the both sides of scissor rest 3 and synchronous restriction curtain P's both sides, consequently can be simultaneously for the support of curtain P's the provision, avoid curtain P to expand the back and receive the influence of wind and rock, improved curtain P's stability.

Referring to fig. 3-8, due to the influence of the structures of the bracket 2 and the scissor rest 3, the two rolling members 4 cannot be tightly attached after being close, so that part of the curtain P is still exposed, and in order to avoid the part of the curtain P from wrinkling during moving, in the utility model, a baffle 21 is arranged on the bracket 2, and the baffle 21 abuts against the back surface of the curtain P.

Specifically, when the scissors frame 3 is contracted, the curtain P exposed out of the winding piece 4 is supported by the baffle 21, so that wrinkles can be avoided, and the service life of the curtain P can be prolonged; in addition, when scissors frame 3 expands, curtain P is strutted, and baffle 21 also can provide the support for curtain P middle part this moment to make both sides and the middle part of curtain P all possess the anti-wind ability, further improved curtain P's stability.

Referring to fig. 2 and 8, further, the scissors frame 3 of the present utility model is commonly used in an automatic arresting gate in the prior art, and for convenience of understanding, in this embodiment, the scissors frame 3 includes a screw motor 31, a fixing rod 32 and a plurality of connecting rods 33; the connecting rods 33 are mutually hinged and interweaved to form a folding net 330, and the middle part of the folding net 330 is arranged on the bracket 2; the screw motor 31 is arranged on the bracket 2 and is in driving connection with the folding net 330; the two fixing rods 32 are symmetrically arranged on two sides of the folding net 330, and the two rolling pieces 4 are respectively arranged on the two fixing rods 32.

When the screw shaft of the screw motor 31 is extended, the folding net 330 can be driven to expand or contract, so that the two fixing rods 32 and the corresponding winding piece 4 are far away from each other or close to each other, and the curtain P can be conveniently opened or wound.

Referring to fig. 8 to 13, the retractor 4 includes a drum 41, a rotating lever 42, and a return spring 43; the winding drum 41 is arranged on the scissors frame 3, and a winding groove 410 communicated with the outside is formed in the winding drum 41; the rotating rod 42 is rotatably arranged in the winding drum 41, a hook 420 is arranged on the rotating rod 42, and the side of the curtain P passes through the winding groove 410 to the inside of the winding drum 41 and is connected with the hook 420; the return spring 43 is sleeved on the rotating rod 42, and when the scissors frame 3 is contracted, the return spring 43 is in a normal state, and when the scissors frame 3 is expanded, the return spring 43 is in an energy storage state.

Specifically, in the conventional case, the scissors frame 3 is contracted to make the two reels 41 close to each other, and the rotating rod 42 is in a static state under the influence of the return spring 43, and at this time, the rest of the curtain P is uniformly wound around the inside of the two reels 41 except for the exposed portion in the middle of the curtain P;

when the scissors frame 3 expands, the scissors frame 3 applies a pulling force to the two rolling members 4, under the condition that the length of the curtain P is unchanged, the curtain P overcomes the elastic force of the reset spring 43 and drives the rotating rod 42 to rotate reversely, so that the curtain P in the winding drum 41 is released to the outside through the winding groove 410, and the scissors frame 3 is controlled to stop expanding after the curtain P is unfolded to a proper size; during the reversing process of the rotating rod 42, the return spring 43 stores energy to compress and applies a pulling force to the curtain P, so that the curtain P is tensioned;

after the use, the scissor rest 3 is controlled to shrink, the energy released by the reset spring 43 is recovered, and the rotating rod 42 is synchronously driven to rotate forward to roll the curtain P.

In summary, the design of the return spring 43 can apply tension to the curtain P to improve the stability of the curtain P, and can synchronously drive the rotating rod 42 to rotate for return when the scissors frame 3 is contracted, so as to realize automatic winding of the curtain P.

Further, a servo motor (not shown) can be used in place of the return spring 43 in the present utility model, that is, the rotating rod 42 is directly driven to rotate by the servo motor to roll up and release the curtain P, but the design needs to strictly control the operation timing of the servo motor.

Specifically, when the scissors frame 3 is expanding, the servo motor needs to synchronously control the rotating rod 42 to reversely release the curtain P, and the release speed needs to be corresponding to the expansion speed of the scissors frame 3; similarly, when the scissor frame 3 is contracted, the servo motor needs to synchronously control the rotating rod 42 to positively rotate the winding curtain P, and the winding speed needs to be corresponding to the expanding speed of the scissor frame 3, so that the operation conflict between the scissor frame 3 and the winding piece 4 is avoided.

Therefore, the servo motor is adopted to replace the return spring 43, so that the winding and releasing precision of the curtain P can be higher, but a corresponding program is required to be additionally arranged, the manufacturing cost is higher, and the curtain P is easy to break down; based on this, the return spring 43 is preferably used in the present utility model, but there is no limitation to the use of a servo motor instead of the return spring 43.

Referring to fig. 3 and 9, in the present utility model, the moving position of the support 2 may be controlled automatically or manually, and in order to improve the convenience of use, a driving mechanism 5 is used in the present utility model, and the driving mechanism 5 is installed in the accommodating cavity 10 and is in driving connection with the support 2, so as to drive the support 2 to move, and further make the two rolling members 4 enter into and exit from the opening of the accommodating cavity 10.

Further, the driving mechanism 5 is various, for example, an electric screw rod or an electric cylinder can be adopted, in order to improve the operation stability, the driving mechanism 5 in the utility model comprises a gear box 51, a driving motor 52 and a screw 53, the gear box 51 is arranged in the accommodating cavity 10, and the driving motor 52 is in driving connection with the input end of the gear box 51; the screw 53 is drivingly connected to the output end of the gear case 51, and the screw 53 extends in the opening direction of the accommodating chamber 10 and is screwed to the bracket 2.

When the scissors are used, the shaft lever of the driving motor 52 is controlled to rotate positively and negatively, the screw rod 53 rotates positively and negatively after being transmitted by the gear box 51, and the bracket 2 can be driven to move back and forth along the opening direction of the accommodating cavity 10 when the screw rod 53 rotates because the bracket 2 is movably limited in the accommodating cavity 10, so that the contracted scissors frame 3 and the furling piece 4 can enter and exit the accommodating cavity 10.

It should be noted that the gear box 51 belongs to the prior art, which is not described in detail in the present utility model, but regarding the power supply problem, an external power source may be used or a storage battery may be installed in the storage box 1 for supplying power to the driving mechanism 5, and then a corresponding remote control module is provided to control the operation state of the driving motor 52.

Referring to fig. 1-7, considering that after the bracket 2 is accommodated in the accommodating cavity 10, the overall size of the bracket can be reduced, the bracket is convenient to carry, but the bracket does not have the waterproof and dustproof effects, in order to solve the problem, the utility model further comprises a box cover 6, the box cover 6 is provided with two box covers which are symmetrically hinged on the storage box 1, and the two box covers 6 can be mutually closed or mutually far away so as to close or open the opening of the accommodating cavity 10, and further enclose or expose the rolling piece 4.

Specifically, when the curtain P is rolled up on the scissor rest 3, and the bracket 2 brings the scissor rest 3 into the accommodating cavity 10, the two box covers 6 are turned over to close and splice each other, so that the opening of the accommodating cavity 10 can be closed, and the scissor rest 3, the rolling-up piece 4, the curtain P and other parts are enclosed, so that the scissor rest 3, the rolling-up piece 4, the curtain P and other parts are prevented from being exposed outside, and the service life is prolonged;

when the curtain P is needed to be used, the two box covers 6 are turned away from each other, the opening of the accommodating cavity 10 can be opened, parts such as the shear rest 3, the rolling piece 4 and the curtain P are exposed, and finally the corresponding parts are moved out of the accommodating cavity 10 and unfolded by the upward moving support 2.

Referring to fig. 1-7, the utility model further includes a carrier 7, wherein bayonets 60 are provided on both the two box covers 6, and when the two box covers 6 are close to each other, the two bayonets 60 are mutually enclosed to form a clamping groove 600; the carrier plate 7 is swingably mounted on the storage box 1, and can be attached to or away from the storage box 1, and the carrier plate 7 is further mounted with a projector 8, and the projector 8 can be clamped into the clamping groove 600 along with the swing of the carrier plate 7.

Specifically, under the conventional condition, the carrier plate 7 is attached to the storage box 1, and the projector 8 is clamped into the clamping groove 600, so that rainwater, dust and the like can be prevented from being polluted;

when the projector is used, the carrier plate 7 is firstly swung away from the storage box 1, so that the projector 8 is separated from the clamping groove 600, then the scissor rest 3 is adjusted to expand and prop open the curtain P, the projector 8 can be enabled to correspond to the curtain P, and at the moment, the projector 8 can be connected by using equipment such as a mobile phone, a computer and the like to carry out projection operation.

It should be noted that the projector 8 belongs to the prior art, and is of various types, and the short-focus projector 8 is preferably adopted in the utility model; the technology of connecting the projector 8 through a mobile phone, a computer, etc. is also common, and this will not be further described in the present utility model.

Referring to fig. 1 and 6, the utility model further comprises a fixing leg member 9, wherein the fixing leg member 9 is movably mounted on the storage box 1 and can be abutted against the ground or stored on the storage box 1; the design of the fixed leg piece 9 can improve the installation stability of the storage box 1, so as to prevent the curtain P from turning on one's side in the using process.

Further, the fixing leg members 9 are provided with a plurality of fixing leg members and are respectively installed at each side line of the storage box 1, so that stability of the storage box 1 is further improved.

Referring to fig. 1, 6, 14 and 15, the type of the fixing leg 9 is very common in the case field, so the present utility model is not limited thereto; in order to facilitate storage and hiding, in the utility model, a hiding groove 11 is arranged on a storage box 1, and a fixed foot piece 9 comprises a fastening seat 91, a foot rod 92, a swing arm 93 and a lock catch 94; the fastening seat 91 is arranged in the hidden groove 11, one end of the foot rod 92 is hinged with the fastening seat 91, and a sliding groove 92h is arranged on the rod body of the foot rod 92; a first end of the swing arm 93 is hinged with the fastening seat 91, and a second end of the swing arm 93 is provided with a slide column 93h which is in sliding connection with the slide groove 92h, so that the foot rod 92 is provided with a first position which is accommodated in the hidden groove 11 and a second position which is in overturning abutting contact with the ground; the lock 94 is hinged to the foot bar 92, and when the foot bar 92 is in the second position, the lock 94 locks the slide post 93h in the slide groove 92 h.

Specifically, in the conventional case, the foot lever 92 is at the first position, so that the supporting foot member is integrally hidden in the hiding groove 11 of the storage box 1, so as to facilitate the movement of the storage box 1;

when the curtain P is needed to be used, the storage box 1 is placed on a plane (ground), then the foot rod 92 is shifted to a second position, in the process, the sliding column 93h slides to the end part of the ground sliding groove 92h, and the lock catch 94 is shifted to lock the sliding column 93h, so that the foot rod 92 can be fixed at the second position, the contact area between the storage box 1 and the ground is increased, and the storage box 1 is placed more stably;

after the use, the lock catch 94 is shifted to release the sliding column 93h, and the foot bar 92 is adjusted to return to the first position, so that the storage box 1 can be moved.

It should be noted that the shape of the lock catch 94 is various, and the utility model is not limited thereto, and in this embodiment, the lock catch 94 is provided with a sheet-shaped block, and the end portion of the lock catch 94 can be clamped with the sliding post 93h by pulling the lock catch 94.

Referring to fig. 3 and 7, the storage box 1 is further provided with a handle 12 to facilitate the user to hold the storage box 1.

Referring to fig. 1-4, universal wheels 13 are installed at the bottom of the storage box 1 to improve flexibility of the storage box 1, and facilitate a user to adjust the position of the storage box 1.

It should also be noted that while embodiments of the present utility model have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made hereto without departing from the spirit and principles of the present utility model.

Claims (10)

1. A portable folding outdoor projection curtain, comprising:

the storage box (1), the storage box (1) is internally provided with an accommodating cavity (10) which is open outwards;

a bracket (2), wherein the bracket (2) is movably arranged in the accommodating cavity (10) and can enter and leave an opening of the accommodating cavity (10);

the scissor frame (3) is arranged on the bracket (2) and can be contracted or expanded;

the rolling pieces (4) are arranged, and the rolling pieces (4) are symmetrically arranged on the scissors frames (3) to roll two sides of the curtain (P) respectively;

when the scissors frame (3) is contracted, the two rolling pieces (4) are mutually close and can move along with the bracket (2) to enter and exit the accommodating cavity (10); when the scissors frame (3) expands, the two rolling-up pieces (4) are far away from each other so as to prop open the curtain (P).

2. A portable folding outdoor projection curtain according to claim 1, characterized in that the support (2) is provided with a baffle (21), the baffle (21) being in abutment with the back of the curtain (P).

3. A portable folding outdoor projection screen according to claim 1, characterized in that the winding-up element (4) comprises a winding drum (41), a rotating rod (42) and a return spring (43); the winding drum (41) is arranged on the scissor frame (3), and a winding groove (410) communicated with the outside is formed in the winding drum (41); the rotating rod (42) is rotatably arranged in the winding drum (41), a hook (420) is arranged on the rotating rod (42), and the side of the curtain (P) passes through the winding groove (410) to the inside of the winding drum (41) and is connected with the hook (420); the return spring (43) is sleeved on the rotating rod (42), and when the scissors frame (3) is contracted, the return spring (43) is in a normal state, and when the scissors frame (3) is expanded, the return spring (43) is in an energy storage state.

4. A portable folding outdoor projection screen according to claim 1, further comprising a driving mechanism (5), said driving mechanism (5) being mounted in said housing chamber (10) and being in driving connection with said support (2) to drive said support (2) to move, thereby moving both said rolling members (4) in and out of the opening of said housing chamber (10).

5. A portable folding outdoor projection screen according to claim 4, characterized in that the driving mechanism (5) comprises a gear box (51), a driving motor (52) and a screw (53), the gear box (51) is mounted in the housing cavity (10), the driving motor (52) is in driving connection with the input end of the gear box (51); the screw rod (53) is in driving connection with the output end of the gear box (51), and the screw rod (53) extends along the opening direction of the accommodating cavity (10) and is in threaded connection with the bracket (2).

6. A portable folding outdoor projection curtain according to claim 1, further comprising a cover (6), wherein the cover (6) is provided with two covers symmetrically hinged to the storage box (1), and the two covers (6) can be moved close to each other or away from each other to close or open the opening of the accommodating cavity (10) and thereby enclose or expose the winding member (4).

7. The portable folding outdoor projection curtain according to claim 6, further comprising a carrier plate (7), wherein bayonets (60) are arranged on the two case covers (6), and when the two case covers (6) are close to each other, the two bayonets (60) are mutually enclosed to form a clamping groove (600); the carrying plate (7) can be arranged on the storage box (1) in a swinging way, can be attached to or away from the storage box (1), and is also provided with a projector (8); when the carrier plate (7) is attached to the storage box (1), the projector (8) is clamped into the clamping groove (600); when the carrying plate (7) is far away from the storage box (1), the projector (8) is separated from the clamping groove (600) and can correspond to the curtain (P).

8. A portable folding outdoor projection screen according to claim 1, further comprising a fixed foot member (9), said fixed foot member (9) being movably mounted on said storage box (1) and being adapted to abut against a ground surface or to be received on said storage box (1).

9. The portable folding outdoor projection curtain according to claim 8, wherein the storage box (1) is provided with a hidden groove (11), and the fixed leg (9) comprises a fastening seat (91), a leg (92), a swing arm (93) and a lock catch (94); the fastening seat (91) is arranged in the hidden groove (11), one end of the foot rod (92) is hinged with the fastening seat (91), and a sliding groove (92 h) is formed in the rod body of the foot rod (92); a first end of the swing arm (93) is hinged with the fastening seat (91), and a second end of the swing arm (93) is provided with a sliding column (93 h) which is in sliding connection with the sliding groove (92 h), so that the foot rod (92) is provided with a first position which is accommodated in the hidden groove (11) and a second position which is overturned to abut against the ground; the lock catch (94) is hinged to the foot rod (92), and when the foot rod (92) is in the second position, the lock catch (94) can lock the sliding column (93 h) in the sliding groove (92 h).

10. A portable folding outdoor projection screen according to claim 1, characterized in that the bottom of the storage box (1) is provided with universal wheels (13).