CN213876293U - Projection screen - Google Patents

Abstract

The embodiment of the application discloses a projection screen, and belongs to the technical field of projection. The projection screen includes: the device comprises a first frame, a second frame, a hinge mechanism, a limiting piece, a flexible curtain and a tensioning mechanism; the first frame and the second frame are rotatably connected through a hinge mechanism; the limiting piece is used for limiting the first frame and the second frame at a coplanar position to form a rectangular frame; the flexible curtain is attached to the front surface of the rectangular frame, and the edge of the flexible curtain is turned over to wrap the edge of the rectangular frame; the tensioning mechanism is used for tensioning the edge of the flexible curtain on the back of the rectangular frame, and the tensioning mechanism can also adjust the tensioning degree of the flexible curtain. In this application embodiment, when the projection screen transportation is limited, adjust tensioning mechanism in order to transfer the flexible curtain loose, later dismantle the locating part to relative rotation first frame and second frame under the relaxed state of flexible curtain, with folding first frame and second frame, reduce the shared space of projection screen, guarantee projection screen's normal transportation.

Description

Projection screen

Technical Field

The embodiment of the application relates to the technical field of projection, in particular to a projection screen.

Background

With the continuous development of science and technology, projection equipment is more and more applied to the work and the life of people. At present, a projection device mainly comprises a projection host and a projection screen. The light outlet of the projection host faces the projection screen to emit light beams to the projection screen, and the projection screen is used for receiving the light beams to realize the display of pictures.

In the related art, in order to improve the viewing effect and simultaneously improve the anti-reflection and eye-protection effects, the size of the projection screen is getting larger. However, as the pursuit of large-sized projection screens, especially projection screens of 100 inches and above, increases the space occupied by the projection screens, which inevitably increases the difficulty of transporting the projection screens.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a projection screen, which can ensure the transportation of the projection screen under the condition of large size. The technical scheme is as follows:

a projection screen, comprising: the device comprises a first frame, a second frame, a hinge mechanism, a limiting piece, a flexible curtain and a tensioning mechanism;

the first frame and the second frame are rotatably connected by the hinge mechanism;

the limiting piece is detachably and fixedly connected with the first frame and the second frame, and is used for limiting the first frame and the second frame at a coplanar position to form a rectangular frame;

the flexible curtain is attached to the front face of the rectangular frame, and the edge of the flexible curtain is turned over to wrap the edge of the rectangular frame;

the tensioning mechanism is used for tensioning the edge of the flexible curtain on the back face of the rectangular frame, and the tensioning mechanism can also adjust the tensioning degree of the flexible curtain.

Optionally, the limiting member is a U-shaped slot, and the slot is detachably fastened to the first frame and the second frame.

Optionally, the limiting member is a fixed beam, and the fixed beam is detachably and fixedly connected with the first frame and the second frame.

Optionally, the hinge mechanism is a 180 degree limit hinge.

Optionally, the first frame comprises an upper rim, a lower rim and a side rim;

the two ends of the side frame are fixedly connected with the first end of the upper frame and the first end of the lower frame respectively to form a right-angle U-shaped frame, and the second end of the upper frame and the second end of the lower frame are both connected with the hinge mechanism.

Optionally, the first frame further includes angle irons, and the side frames and the upper frame and the side frames and the lower frame are fixedly connected through the angle irons.

Optionally, the first frame further includes a vertical beam, and two ends of the vertical beam are respectively fixedly connected to the upper frame and the lower frame.

Optionally, the tensioning mechanism comprises a support bar and a tensioning member;

the edge of the flexible curtain is provided with an accommodating pocket, and the supporting rods are arranged in the accommodating pockets at the corresponding positions of the first frame and the second frame;

one end of the tensioning piece is connected with the supporting rod, and the other end of the tensioning piece is connected with the frame corresponding to the supporting rod.

Optionally, the tensioning member is an extension spring, a first end of the extension spring is connected with the support rod through a hook, and a second end of the extension spring is connected with the frame corresponding to the support rod through a hook.

Optionally, the tension member comprises a first clamping strip and an adjusting screw;

the first end of the first clamping strip is connected with the supporting rod, the frame corresponding to the supporting rod is provided with a first through hole, and the adjusting screw penetrates through the first through hole to be in threaded connection with the second end of the first clamping strip.

The technical scheme provided by the embodiment of the application has the beneficial effects that at least:

in the embodiment of the application, after the first frame and the second frame rotate to the coplanar position based on the hinge mechanism, the first frame and the second frame are limited through the limiting part, so that the plane of the rectangular frame is ensured, and then the tensioning mechanism is adjusted to tension the flexible curtain, so that the flatness of the flexible curtain is ensured, and the normal use of the projection screen is further ensured; when the transportation of the projection screen is limited, the tensioning mechanism is adjusted to loosen the flexible curtain, and then the limiting part is disassembled.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic rear view of a projection screen according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a projection screen provided in the embodiment of the present application after being folded in half;

fig. 3 is an exploded view of a first frame according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of a hinge mechanism provided in an embodiment of the present application;

FIG. 5 is an exploded view of an alternative hinge mechanism provided by embodiments of the present application;

FIG. 6 is a schematic diagram illustrating a rotation process of another hinge mechanism provided in an embodiment of the present application;

FIG. 7 is a schematic diagram of another projection screen according to an embodiment of the present disclosure;

FIG. 8 is a schematic diagram of a side view of a portion of a first frame according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of a flexible curtain provided in an embodiment of the present application;

FIG. 10 is an exploded view of another projection screen provided in an embodiment of the present application;

FIG. 11 is a schematic structural diagram of a support rod of the type provided in the embodiments of the present application;

FIG. 12 is a schematic view of a flexible curtain tensioned by a tensioning member according to an embodiment of the present application;

FIG. 13 is a schematic view of another alternative tensioning member tensioning flexible curtain provided by embodiments of the present application;

fig. 14 is a schematic structural view of another tensioning member tensioning a flexible curtain according to an embodiment of the present application.

Reference numerals:

1: a first frame; 2: a second frame; 3: a hinge mechanism; 4: a limiting member; 5: a flexible curtain; 6: a tensioning mechanism; 7: a fixing clip;

11: an upper frame; 12: a lower frame; 13: a side frame; 14: angle iron; 15: erecting a beam; 16: a limiting groove;

31: a first hinge; 32: a second hinge; 33: a rotating shaft; 34: a first flap; 35: a second flap;

341: a first strand; 342: a first link; 351: a second strand; 352: a second link;

41: fixing the cross beam;

51: an accommodating pocket; 52: a screen sheet; 53: a flexible carrier;

61: a support bar; 62: a tension member;

611: a first type of support bar; 612: a second type of support bar;

621: an extension spring; 622: a first clip strip; 623: an adjusting screw; 624: a second card strip; 625: a limiting rod; 626: and (5) tensioning the rod.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present application more clear, the embodiments of the present application will be further described in detail with reference to the accompanying drawings.

Fig. 1 illustrates a schematic structural diagram of a projection screen according to an embodiment of the present application. As shown in fig. 1, the projection screen includes: the device comprises a first frame 1, a second frame 2, a hinge mechanism 3, a limiting piece 4, a flexible curtain 5 and a tensioning mechanism 6; the first frame 1 and the second frame 2 are rotatably connected by a hinge mechanism 3; the limiting piece 4 is detachably and fixedly connected with the first frame 1 and the second frame 2, and the limiting piece 4 is used for limiting the first frame 1 and the second frame 2 at a coplanar position to form a rectangular frame; the flexible curtain 5 is attached to the front face of the rectangular frame, and the edge of the flexible curtain 5 is turned over to wrap the edge of the rectangular frame; the tensioning mechanism 6 is used for tensioning the edge of the flexible curtain 5 on the back of the rectangular frame, and the tensioning mechanism 6 can also adjust the tension of the flexible curtain 5.

In the embodiment of the application, after the first frame 1 and the second frame 2 rotate to the coplanar position based on the hinge mechanism 3, the position is limited through the limiting part 4, so that the plane of the rectangular frame is ensured, and then the tensioning mechanism 6 is adjusted to tension the flexible curtain 5, so that the flatness of the flexible curtain 5 is ensured, and the normal use of the projection screen is ensured; when the transportation of the projection screen is limited, the tensioning mechanism 6 is adjusted to loosen the flexible curtain 5, and then the limiting part 4 is disassembled, because the flexible curtain 5 is in a loose state, the first frame 1 and the second frame 2 can be rotated relatively, so that the first frame 1 and the second frame 2 can be folded, the space occupied by the projection screen is reduced, and the normal transportation of the projection screen is ensured.

The back surfaces of the first frame 1 and the second frame 2 are connected through a hinge mechanism 3, and at the moment, after the tightness of the flexible curtain 5 is adjusted by the loosening and tightening mechanism 6, the first frame 1 and the second frame 2 can be folded back to back so as to reduce the space occupied by the projection screen; or, the front surfaces of the first frame 1 and the second frame 2 are connected through the hinge mechanism 3, and after the tension degree of the flexible curtain 5 is adjusted and loosened by the tension mechanism 6, the first frame 1 and the second frame 2 can be folded face to face so as to reduce the space occupied by the projection screen. After the first frame 1 and the second frame 2 are folded in half, in order to avoid the relative rotation of the first frame 1 and the second frame 2, as shown in fig. 2, the projection screen further includes a fixing clip 7, and at this time, the fixing clip 7 can be buckled on the first frame 1 and the second frame 2, so as to realize the relative limit of the first frame 1 and the second frame 2.

It should be noted that, when the front surfaces of the first frame 1 and the second frame 2 are connected by the hinge mechanism 3, in order to avoid the protrusion of the hinge mechanism 3 from affecting the flatness of the flexible curtain 5, the first frame 1 and the second frame 2 are both provided with grooves. Thus, the hinge mechanism 3 is respectively settled in the recesses to be connected to the first frame 1 and the second frame 2. In addition, in order to ensure that the first frame 1 and the second frame 2 can be folded in two better face to face, the edge of the flexible curtain 5 is provided with a notch corresponding to the joint of the first frame 1 and the second frame 2.

Next, each component included in the projection screen in the embodiment of the present application will be described.

In the embodiment of the present application, the structure of the first frame 1 and the structure of the second frame 2 are the same or similar, and therefore only the structure of the first frame 1 will be explained next, and the structure of the second frame 2 can refer to the structure of the first frame 1.

Alternatively, as shown in fig. 3, the first frame 1 includes an upper frame 11, a lower frame 12 and side frames 13, and both ends of the side frames 13 are fixedly connected with a first end of the upper frame 11 and a first end of the lower frame 12, respectively, to form a right-angled U-shaped frame. Of course, the first frame 1 may be a frame having other shapes than a rectangular U-shaped frame. Illustratively, the first frame 1 has a rectangular shape, or a right trapezoid shape.

For the right-angle U-shaped frame, the length of the upper frame 11 and the length of the lower frame 12 may be the same, and of course, may also be different, which is not limited in this application. In addition, the hinge mechanism 3 is connected to both the second end of the upper frame 11 and the second end of the lower frame 12, and when the hinge mechanism 3 is located on the front surface of the first frame 1, both the second end of the upper frame 11 and the second end of the lower frame 12 have grooves.

When the side frame 13 is fixedly connected with the upper frame 11 and the lower frame 12, optionally, the first end of the side frame 13 has a first clamping groove, the first end of the upper frame 11 has a first protrusion, the first protrusion is limited in the first clamping groove, so that the fixed connection between the side frame 13 and the upper frame 11 is realized, the second end of the side frame 13 has a second clamping groove, the first end of the lower frame 12 has a second protrusion, the second protrusion is limited in the second clamping groove, and the fixed connection between the side frame 13 and the lower frame 12 is realized.

Wherein, first draw-in groove and first arch to and second draw-in groove and the bellied position of second also can be exchanged, as long as can realize the both ends of side frame 13 respectively with the first end of last frame 11 and the corresponding fixed connection of the first end of lower frame 12 can, this application embodiment does not limit to this.

Of course, besides the fixed connection of the side frame 13 and the upper frame 11 and the lower frame 12 respectively realized by the cooperation of the above-mentioned clamping groove and the protrusion, the fixed connection of the side frame 13 and the upper frame 11 and the lower frame 12 respectively can also be realized by other manners. Illustratively, as shown in fig. 3, the first frame 1 further includes angle irons 14, and the side frames 13 and the upper frame 11, and the side frames 13 and the lower frame 12 are fixedly connected through the angle irons 14. That is, the first end of the side frame 13 and the first end of the upper frame 11, and the second end of the side frame 13 and the first end of the lower frame 12 are all fixedly connected by the angle iron 14.

Wherein, angle bar 14 is planar structure, and the angle limit of angle bar 14 has the screw hole, and the tip of side frame 13, the first end of last frame 11 and the first end of lower frame 12 all have the through-hole that corresponds with the screw hole, can pass the through-hole through set screw like this to precession corresponding screw hole, in order to realize side frame 13, go up frame 11 and lower frame 12 respectively with the fixed connection on angle limit of angle bar 14, and then realize side frame 13 respectively with the fixed connection on last frame 11 and lower frame 12.

In addition, for the right-angled U-shaped frame, when the first frame 1 is not fixedly connected to the hinge mechanism 3, the second ends of the upper frame 11 and the lower frame 12 included in the first frame 1 are in a suspended state, which easily causes deformation of the first frame 1 by an external force. Thus, as shown in fig. 3, the first frame 1 further includes a vertical beam 15, and both ends of the vertical beam 15 are fixedly connected to the upper side frame 11 and the lower side frame 12, respectively. In this way, the upper frame 11 and the lower frame 12 can be supported by the vertical beams 15, and the possibility of deformation of the first frame 1 can be avoided.

Optionally, both ends of the vertical beam 15 are fixedly connected with the second end of the upper frame 11 and the second end of the lower frame 12, respectively, so as to form better support for the upper frame 11 and the lower frame 12. In addition, when the first frame 1 and the second frame 2 are rotatably connected by the hinge mechanism 3, as shown in fig. 1 and 3, the hinge mechanism 3 may also be connected to the vertical beam 15, which is not limited in the embodiment of the present application.

In the embodiment of the present application, a 180-degree limit hinge may be selected as the hinge mechanism 3, so that the first frame 1 and the second frame 2 can be limited to a coplanar position by the hinge mechanism 3 when the first frame 1 and the second frame 2 are relatively rotated. Certainly, other angle-limiting hinges can be selected, as long as the first frame 1 and the second frame 2 can be ensured to rotate to the coplanar position and simultaneously rotate to reduce the space occupied by the projection screen, which is not limited in the embodiment of the present application.

In some embodiments, as shown in fig. 4, the hinge mechanism 3 includes a first hinge 31, a second hinge 32, and a rotation shaft 33, and the first hinge 31 and the second hinge 32 are connected by the rotation shaft 33 to enable relative rotation of the first hinge 31 and the second hinge 32. The first hinge 31 is fixedly connected with the first frame 1, and the second hinge 32 is fixedly connected with the second frame 2, so that the first frame 1 and the second frame 2 can rotate relatively.

In addition, one side of each of the first hinge 31 and the second hinge 32 is provided with a protrusion, so that the rotating shaft 33 passes through the protrusions to realize rotatable connection of the first hinge 31 and the second hinge 32, at this time, when the first hinge 31 and the second hinge 32 rotate to the coplanar position, one end of the first hinge 31 close to the rotating shaft 33 is abutted against one end of the second hinge 32 close to the rotating shaft 33, and thus 180-degree limit of the first hinge 31 and the second hinge 32 is realized.

In other embodiments, as shown in fig. 5, the hinge mechanism 3 includes a first flap 34 and a second flap 35, the first flap 34 includes a first hinge member 341 and a first link 342, the second flap 35 includes a second hinge member 351 and a second link 352, the first hinge member 341 and the second hinge member 351 are both L-shaped in cross section, one side plate of the first hinge member 341 has a first sliding slot and is fixedly connected to a first end of the first link 342, one side plate of the second hinge member 351 has a second sliding slot and is fixedly connected to a first end of the second link 352, a second end of the first link 342 is slidably retained in the second sliding slot, and a second end of the second link 352 is slidably retained in the first sliding slot.

Thus, as shown in fig. 6, the first and second flippers 34 and 35 can be folded in half based on the sliding of the second end of the first link 342 in the second sliding slot and the sliding of the second link 352 in the first sliding slot, so as to correspond the first and second frames 1 and 2. The other side plate of the first twisted member 341 is fixedly connected to the first frame 1, and the other side plate of the second twisted member 351 is fixedly connected to the second frame 2, so that the relative rotation between the first frame 1 and the second frame 2 is realized.

Of course, the hinge mechanism 3 may have other structures besides the structures described in the above two modes, which is not limited in the embodiment of the present application.

In the embodiment of the present application, the limiting member 4 is mainly used for limiting the coplanar position of the first frame 1 and the second frame 2, and therefore, in some embodiments, the limiting member 4 is a U-shaped slot, and the slot is detachably fastened to the first frame 1 and the second frame 2. In this way, since the card slot is simultaneously buckled on the first frame 1 and the second frame 2, the relative rotation of the first frame 1 and the second frame 2 is avoided.

Wherein, because the outer edge of the first frame 1 and the outer edge of the second frame 2 are both wrapped by the flexible curtain 5, the clamping groove can be buckled at the inner edges of the first frame 1 and the second frame 2. In addition, the first frame 1 and the second frame 2 are provided with grooves corresponding to the clamping grooves, so that after the clamping grooves are buckled on the first frame 1 and the second frame 2, the clamping grooves can be settled in the grooves, and the flatness of the flexible curtain 5 is ensured.

In other embodiments, as shown in fig. 7, the limiting member 4 is a fixed beam 41, and the fixed beam 41 is detachably and fixedly connected to the first frame 1 and the second frame 2, respectively. In this way, after the first frame 1 and the second frame 2 are rotated to the coplanar position, the relative rotation of the first frame 1 and the second frame 2 can be prevented by the fixed connection of the fixed cross members 41 with the first frame 1 and the second frame 2, respectively.

When the fixed cross beam 41 is respectively fixedly connected with the first frame 1 and the second frame 2, in order to ensure that the edges of the rectangular frames formed after the fixed connection are flush, as shown in fig. 8, the first frame 1 further has a limiting groove 16, the same second frame 2 is easy to have the limiting groove 16, and at this time, the cross beam can be limited in the limiting groove 16 of the first frame 1 and the second frame 2, so that the phenomenon that the edges of the rectangular frames are uneven is avoided through the limiting groove 16.

Of course, the limiting member 4 may be other members besides the U-shaped slot or the fixed beam 41, as long as the first frame 1 and the second frame 2 can be limited to the coplanar position, which is not limited in the embodiment of the present application.

In the embodiment of the present application, as shown in fig. 9, the flexible curtain 5 includes a curtain sheet 52 and a flexible carrier 53, the curtain sheet 52 is fixed on a first side of the flexible carrier 53, and edges of the flexible carrier 53 extend out of four side edges of the curtain sheet 52; the second side of the flexible carrier 53 is attached to the front surface of the rectangular frame, the edge of the flexible carrier 53 is folded to wrap the edge of the rectangular frame, and the tensioning mechanism 6 is used for tensioning the edge of the flexible carrier 53 to the back surface of the rectangular frame.

The screen 52 is an optical film, and the optical film is used in cooperation with the projection host. The projection host is used for emitting light beams to the optical diaphragm, and the optical diaphragm is used for receiving and reflecting the light beams to display pictures. The curtain 52 may be secured to the flexible carrier 53 by adhesive means.

The flexible carrier 53 may be a flexible cloth, or may be another flexible member, as long as it can be bent at will and has a certain flatness after being tensioned, which is not limited in the embodiment of the present application.

The projection of the flexible carrier 53 on the plane of the curtain 52 covers the curtain 52 or covers four sides of the curtain 52 to ensure that the edges of the flexible carrier 53 extend out of the four sides of the curtain 52, so as to ensure the flatness of the curtain 52 while tensioning the flexible carrier 53.

When the projection of the flexible carrier 53 on the plane of the screen 52 covers the screen 52, the flexible carrier 53 is circular or rectangular, and when the projection of the flexible carrier 53 on the plane of the screen 52 covers four sides of the screen 52, the flexible carrier 53 is in a shape of a circle. Of course, the flexible carrier 53 may be other rectangular shapes besides circular, rectangular and square, as long as after the curtain sheet 52 is fixed on the flexible carrier 53, the edge of the flexible carrier 53 extends out of four sides of the curtain, and the extended portion can be bent to the back of the rectangular frame, which is not limited in the embodiments of the present application.

In some embodiments, the tensioning mechanism 6 includes a tensioning member 62, where one end of the tensioning member 62 is directly connected to the edge of the flexible curtain 5 and the other end of the tensioning member 62 is connected to the back of the rectangular frame to provide tension to the edge of the flexible curtain 5.

Optionally, the tension member 62 is an extension spring 621, and of course, the tension member 62 may have other structures, which is not limited in this embodiment.

In other embodiments, as shown in fig. 10, the tensioning mechanism 6 comprises a support bar 61 and a tensioning member 62; the edge of the flexible curtain 5 is provided with an accommodating pocket 51, and the accommodating pockets 51 at the corresponding positions of the first frame 1 and the second frame 2 are respectively provided with a support rod 61; one end of the tension member 62 is connected to the support rod 61, and the other end of the tension member 62 is connected to the frame corresponding to the support rod 61.

Like this, support the whole support at the edge of flexible curtain 5 through bracing piece 61, and then strain bracing piece 61 through straining piece 62 to realize straining piece 62 to the whole take-up at the edge of flexible curtain 5, thereby guaranteed the taut homogeneity of flexible curtain 5, avoid flexible curtain 5 to appear the phenomenon of fold because of local tautness is great.

Wherein, the number of the types of the supporting bars 61 and the length of each type of the supporting bars 61 may be set according to the length of the frame included in the first frame 1 and the second frame 2. Illustratively, as shown in fig. 11, the first frame 1 and the second frame 2 are both identical U-shaped frames, where the side frames 13 and 13 of the first frame 1 and the second frame 2 correspond to the first-type support bars 611, the first-type support bars 611 have a length equal to that of the side frames 13, the upper frame 11 and the lower frame 12 of the first frame 1, and the upper frame 11 and the lower frame 12 of the second frame 2 correspond to the second-type support bars 612, and the second-type support bars 612 have a length equal to that of the upper frame 11.

Alternatively, as shown in fig. 12, the tension member 62 is an extension spring 621 in the above embodiment, in which a first end of the extension spring 621 is connected to the support rod 61 through a hook, and a second end of the extension spring 621 is connected to the corresponding frame of the support rod 61 through a hook.

Wherein, the flexible curtain 5 is provided with a second through hole, and the hook at the first end of the extension spring 621 passes through the second through hole and is hung on the support rod 61; the back of the frame body frame is provided with a hanging groove, and the hook at the second end of the extension spring 621 is hung on the hanging groove.

Alternatively, as shown in fig. 13, the tension member 62 includes a first clip strip 622 and an adjustment screw 623; the first end of the first clamping strip 622 is connected with the support rod 61, the frame corresponding to the support rod 61 is provided with a first through hole, and the adjusting screw 623 penetrates through the first through hole and is in threaded connection with the second end of the first clamping strip 622.

Wherein, the end of the adjusting screw 623 which is not connected with the first clamping strip 622 is limited at the other side of the first through hole. In this way, the adjusting screw 623 can be rotated relative to the first clamping bar 622 to adjust the length of the tensioning member 62, so as to adjust the tension of the supporting rod 61, thereby adjusting the tension of the flexible curtain 5.

In some embodiments, the first end of the first clip strip 622 has a receiving groove, and the supporting rod 61 is limited in the receiving groove and can slide in the receiving groove. Thus, the first clamping bar 622 can be limited on the supporting rod 61 by sliding from the end of the supporting rod 61 based on the sliding of the supporting rod 61 in the accommodating groove, and the position of the first clamping bar 622 in the length direction of the supporting rod 61 can be adjusted.

The opening size of the accommodating groove is smaller than the diameter of the supporting rod 61, so that the supporting rod 61 is limited in the accommodating groove. Of course, the supporting rod 61 can be limited in the accommodating groove in other ways, and the embodiment of the present application does not limit this.

When the support rod 61 is limited in the accommodating groove, the accommodating pocket 51 at the edge of the flexible curtain 5 is also located in the accommodating groove, so that the opening side of the accommodating groove inevitably contacts the flexible curtain 5. From this, the opening side of storage tank has flexible pad to avoid the opening side of storage tank to cause the fish tail to flexible curtain 5 through flexible pad, thereby avoid flexible curtain 5 to take place the damaged condition.

In other embodiments, the first end of the first clip strip 622 has a hook, and the flexible curtain 5 has a second through hole, through which the hook is hung on the rod body. In this way, a second through hole can be formed at a position where the flexible curtain 5 needs to be tensioned, and then the hook of the first clamping strip 622 passes through the second through hole to be hung on the support rod 61.

Optionally, as shown in fig. 14, the tension member 62 includes a second clamping bar 624, a limiting rod 625 and a tension rod 626; the first end of the second clamping strip 624 is connected with the support rod 61, the second end of the second clamping strip 624 is provided with a limit groove 16, and the first end of the limit rod 625 is rotatably limited in the limit groove 16; the first end of the tension bar 626 is rotatably connected to the corresponding frame of the support bar 61, and the middle of the tension bar 626 is rotatably connected to the second end of the stopper 625.

Like this, when urging the tightening rod 626 to rotate towards the direction away from the supporting rod 61 under the action of external force, the tightening rod 626 drives the second end of the limiting rod 625 to move towards the direction away from the supporting rod 61, and then drives the second clamping strip 624 to move through the limiting rod 625, so as to tighten the supporting rod 61.

When the tension rod 626 rotates to the first end of the limiting rod 625, the first end of the tension rod 626, and the second end of the limiting rod 625 are located on the same straight line, the reverse acting force of the flexible curtain 5 on the limiting rod 625 acts on the rotating shaft 33 of the limiting rod 625 and the rotating shaft 33 of the tension rod 626, so that the limitation of the tension rod 626 can be realized.

Of course, the pulling bar 626 may also be limited by a limiting latch. Illustratively, the tension member 62 further comprises a limit pin, the limit rod 625 has a first limit hole, the tension rod 626 has a second limit hole, and the limit pin is used for extending into the first limit hole and the second limit hole. Furthermore, the extension direction of the limiting rod 625 is provided with a row of first limiting holes, so that a limiting bolt can be inserted into different first limiting holes, and the tightness of the tensioning piece 62 on the supporting rod 61 can be adjusted.

The structure of the first end of the second strip 624 is the same as or similar to the structure of the first end of the first strip 622, but may also be different as long as the connection with the support rod 61 can be achieved, which is not limited in the embodiment of the present application.

It should be noted that, in the above description of the tensioning member 62, the tensioning mechanism 6 formed by the first structure and the supporting rod 61 does not have the function of adjusting the tension of the flexible curtain 5, and the tensioning mechanism 6 formed by the second structure or the third structure and the supporting rod 61 has the function of adjusting the tension of the flexible curtain 5.

It should be noted that, when the edge of the flexible curtain 5 is tensioned by the tensioning mechanism 6, one structure of the tensioning member 62 may be selected to tension the edge of the flexible curtain 5, and of course, a plurality of structures of the tensioning members 62 may be selected to tension the edge of the flexible curtain 5, which is not limited in the embodiment of the present application.

In the embodiment of the application, after the first frame and the second frame rotate to the coplanar position based on the hinge mechanism, the first frame and the second frame are limited through the limiting part, so that the plane of the rectangular frame is ensured, and then the tensioning mechanism is adjusted to tension the flexible curtain, so that the flatness of the flexible curtain is ensured, and the normal use of the projection screen is further ensured; when the transportation of the projection screen is limited, the tensioning mechanism is adjusted to loosen the flexible curtain, and then the limiting part is disassembled.

The above description is only illustrative of the embodiments of the present application and is not intended to limit the embodiments of the present application, and any modification, equivalent replacement, or improvement made within the spirit and principle of the embodiments of the present application should be included in the scope of the embodiments of the present application.

Claims (10)

1. A projection screen, comprising: the device comprises a first frame, a second frame, a hinge mechanism, a limiting piece, a flexible curtain and a tensioning mechanism;

the first frame and the second frame are rotatably connected by the hinge mechanism;

the limiting piece is detachably and fixedly connected with the first frame and the second frame, and is used for limiting the first frame and the second frame at a coplanar position to form a rectangular frame;

the flexible curtain is attached to the front face of the rectangular frame, and the edge of the flexible curtain is turned over to wrap the edge of the rectangular frame;

the tensioning mechanism is used for tensioning the edge of the flexible curtain on the back face of the rectangular frame, and the tensioning mechanism can also adjust the tensioning degree of the flexible curtain.

2. The projection screen of claim 1, wherein the retaining member is a U-shaped slot that releasably secures to the first frame and the second frame.

3. The projection screen of claim 1, wherein the stop is a fixed beam that is removably and fixedly coupled to the first frame and the second frame.

4. A projection screen according to any one of claims 1 to 3, wherein the hinge mechanism is an angle limit hinge.

5. The projection screen of claim 1, wherein the first frame comprises an upper bezel, a lower bezel, and side bezels;

the two ends of the side frame are fixedly connected with the first end of the upper frame and the first end of the lower frame respectively to form a right-angle U-shaped frame, and the second end of the upper frame and the second end of the lower frame are both connected with the hinge mechanism.

6. The projection screen of claim 5 wherein the first frame further comprises angle iron, the side frames and the upper frame, and the side frames and the lower frame being fixedly connected by the angle iron.

7. The projection screen of claim 5 or 6, wherein the first frame further comprises a vertical beam, and wherein two ends of the vertical beam are fixedly connected to the upper rim and the lower rim, respectively.

8. The projection screen of claim 1 wherein the tensioning mechanism comprises a support bar and a tensioning member;

the edge of the flexible curtain is provided with an accommodating pocket, and the supporting rods are arranged in the accommodating pockets at the corresponding positions of the first frame and the second frame;

one end of the tensioning piece is connected with the supporting rod, and the other end of the tensioning piece is connected with the frame corresponding to the supporting rod.

9. The projection screen of claim 8 wherein the tension member is an extension spring, a first end of the extension spring is coupled to the support rod by a hook, and a second end of the extension spring is coupled to a corresponding frame of the support rod by a hook.

10. The projection screen of claim 8 wherein the tension member comprises a first strap and an adjustment screw;

the first end of the first clamping strip is connected with the supporting rod, the frame corresponding to the supporting rod is provided with a first through hole, and the adjusting screw penetrates through the first through hole to be in threaded connection with the second end of the first clamping strip.

Images