CN213876290U

CN213876290U - Projection screen

Info

Publication number: CN213876290U
Application number: CN202023289620.1U
Authority: CN
Inventors: 杨长明; 李建军
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-08-03
Anticipated expiration: 2030-12-30

Abstract

The embodiment of the application discloses a projection screen, and belongs to the technical field of projection. The projection screen includes: the curtain comprises a curtain sheet, a flexible carrier, a frame body, a rod body and a tensioning piece; the curtain sheet is fixed on the first side of the flexible carrier, and the edge of the flexible carrier extends out of four side edges of the curtain sheet; the second side of the flexible carrier is attached to the front face of the frame body, and the edge of the flexible carrier is folded to wrap the edge of the frame body; the edge of flexible carrier has the holding pocket, and the body of rod is located the holding pocket, and the taut piece is used for straining the body of rod at the back of framework. In the embodiment of the application, the tensioning piece passes through the taut flexible carrier of the body of rod, has guaranteed the roughness of flexible carrier, and then guarantees the roughness of curtain piece, has avoided the relatively poor problem of curtain piece roughness because of the big cause of projection screen size. In addition, because the curtain sheet is fixed on the flexible carrier, the flexible carrier can avoid the phenomenon of expansion with heat and contraction with cold, thereby avoiding the situation of the curtain sheet bulging after the projection screen is used for a long time and prolonging the service life of the projection screen.

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. Currently, a projection device mainly includes an optical engine and a projection screen. The light outlet of the optical engine 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, a projection screen includes a back plate and an optical film, and the optical film is laminated and bonded to the back plate, so that the planarization of the optical film is achieved by the back plate. However, when the optical film is bonded by using the back plate, the size of the back plate becomes larger along with the enlargement of the projection screen, and the larger the size is, the more difficult the flatness is to be ensured in the processing process of the back plate, so that the flatness of the optical film is also difficult to be ensured. In addition, after the projection screen is used for a long time, the optical film is easy to bulge, so that the projection screen is scrapped.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a projection screen, can avoid the roughness of curtain in the projection screen to and the problem that the bulge appears in the curtain. The technical scheme is as follows:

a projection screen, comprising: the curtain comprises a curtain sheet, a flexible carrier, a frame body, a rod body and a tensioning piece;

the curtain sheet is fixed on the first side of the flexible carrier, and the edges of the flexible carrier extend out of four side edges of the curtain sheet;

the second side of the flexible carrier is attached to the front face of the frame body, and the edge of the flexible carrier is folded to wrap the edge of the frame body;

the edge of the flexible carrier is provided with an accommodating pocket, the rod body is positioned in the accommodating pocket, and the tensioning piece is used for tensioning the rod body on the back of the frame body.

Optionally, one end of the tensioning member is connected to the rod body, and the other end of the tensioning member is connected to the back surface of the frame body.

Optionally, the tension member is an extension spring.

Optionally, the tension member is a rigid tension member, the length of which is adjustable.

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

the first end of the clamping strip is connected with the rod body, a first through hole is formed in the back face of the frame body, and the adjusting screw penetrates through the first through hole to be connected with the second end of the clamping strip in a threaded mode.

Optionally, the first end of the clamping strip is provided with a containing groove, and the rod body is limited in the containing groove and can slide in the containing groove.

Optionally, the open side of the receiving groove has a flexible pad.

Optionally, a hook is arranged at the first end of the clamping strip, the flexible carrier is provided with a second through hole, and the hook penetrates through the second through hole and is hung on the rod body.

Optionally, one end of the tensioning member is connected to the rod body corresponding to the first side edge of the flexible carrier, the other end of the tensioning member is connected to the rod body corresponding to the second side edge of the flexible carrier, and the first side edge is opposite to the second side edge.

Optionally, three of the tension members are connected to the rod body.

Optionally, three of the tension members are evenly distributed along the rod body.

Optionally, the projection of the flexible carrier on the plane of the curtain sheet covers the curtain sheet or covers four side edges of the curtain sheet.

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

in the embodiment of this application, taut spare has realized the whole taut to the edge of flexible carrier through the taut flexible carrier of the body of rod, has guaranteed the roughness of flexible carrier, and then guarantees the roughness of curtain piece, has avoided the relatively poor problem of curtain piece roughness because of the big cause of projection screen size. In addition, because the curtain sheet is fixed on the flexible carrier, the flexible carrier can avoid the phenomenon of expansion with heat and contraction with cold, thereby avoiding the situation of the curtain sheet bulging after the projection screen is used for a long time and prolonging the service life of the projection screen.

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 flexible carrier adhered with a curtain sheet according to an embodiment of the present application;

FIG. 3 is a schematic side view of a flexible carrier according to an embodiment of the present disclosure without folding edges;

FIG. 4 is a schematic side view of a flexible carrier with folded edges, according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of a partial side view of another projection screen according to an embodiment of the present disclosure;

fig. 6 is a schematic partial side view of another projection screen provided in this embodiment of the present application.

Reference numerals:

1: a screen sheet; 2: a flexible carrier; 3: a frame body; 4: a rod body; 5: a tension member;

21: an accommodating pocket; 22: a second through hole;

31: a first through hole; 32: hanging a groove;

51: an extension spring; 52: a rigid tension member;

521: clamping the strip; 522: an adjusting screw; 523: a containing groove.

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 rear view structure diagram of a projection screen according to an embodiment of the present application. As shown in fig. 1, the projection screen includes: a curtain sheet 1 (not shown), a flexible carrier 2, a frame body 3, a rod body 4 and a tensioning piece 5; the curtain sheet 1 is fixed on the first side of the flexible carrier 2, and the edge of the flexible carrier 2 extends out of four side edges of the curtain sheet 1; the second side of the flexible carrier 2 is attached to the front surface of the frame body 3, and the edge of the flexible carrier 2 is turned over to wrap the edge of the frame body 3; the flexible carrier 2 has a receiving pocket 21 (not shown) at its edge, the rod 4 being located in the receiving pocket 21, and a tightening member 5 for tightening the rod 4 against the back of the frame 3.

In the embodiment of the application, tensioning piece 5 is through the taut flexible carrier 2 of the body of rod 4, has realized the whole taut to the edge of flexible carrier 2, has guaranteed the roughness of flexible carrier 2, and then guarantees the roughness of curtain 1, has avoided the relatively poor problem of curtain 1 roughness because of the big cause of projection screen size. In addition, because the curtain sheet 1 is fixed on the flexible carrier 2, the flexible carrier 2 can avoid the phenomenon of expansion with heat and contraction with cold, thereby avoiding the condition that the curtain sheet 1 bulges after the projection screen is used for a long time, and prolonging the service life of the projection screen.

Wherein, the screen 1 is an optical film, and the optical film is used for being matched with a projection host machine for use. 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 screen 1 may be fixed to the flexible carrier 2 by means of adhesive.

Optionally, the flexible carrier 2 may be a flexible cloth, and of course, may also 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 this application. The flexible carrier 2 may be selected from other colors such as black or white, which is not limited in the embodiment of the present application.

Wherein, the projection of the flexible carrier 2 on the plane of the screen 1 covers the screen 1 or covers four side edges of the screen 1. That is, the flexible carrier 2 is a one-piece structure or a structure having an opening in the center.

Alternatively, when the projection of the flexible carrier 2 on the plane of the screen 1 covers the screen 1, the flexible carrier 2 is circular or rectangular, and when the projection of the flexible carrier 2 on the plane of the screen 1 covers four sides of the screen 1, the flexible carrier 2 is in a shape of a circle. Of course, the flexible carrier 2 may be other rectangles besides circular, rectangular and square, as long as after the curtain sheet 1 is fixed on the flexible carrier 2, the edge of the flexible carrier 2 extends out of four sides of the curtain, and the extended portion can be bent to the back of the frame 3, which is not limited in the embodiments of the present application. Illustratively, as shown in fig. 2, the flexible carrier 2 is rectangular, the curtain sheet 1 is adhered to the flexible carrier 2, and four side edges of the flexible carrier 2 respectively correspond to four side edges extending out of the curtain sheet 1.

Wherein, the outward flange of flexible carrier 2 is the rectangle, and is that flexible carrier 2 has four sides promptly, and the accessible is a plurality of the same taut 5 of this moment and evenly strains a plurality of positions of arbitrary side of flexible carrier 2, as long as the length direction of the body of rod 4 in the holding pocket 21 of guaranteeing flexible carrier 2 is parallel with the edge of framework 3, homogeneity when guaranteeing flexible carrier 2 taut can be guaranteed to the roughness of assurance flexible carrier 2 that can be better.

Further, for the flexible carrier 2 with a rectangular outer edge, in order to facilitate the part of the flexible carrier 2 extending out of the side edge of the curtain sheet 1 to be folded to the back of the frame 3, as shown in fig. 2, four corners of the flexible carrier 2 are provided with notches. The notch may be a triangular notch, or may also be a rectangular notch or a notch with another shape, which is not limited in this application.

The projection screen is explained next in a configuration in which the outer edge of the flexible carrier 2 is rectangular. At this time, as shown in fig. 3 and 4, the four sides of the flexible carrier 2 are respectively provided with the accommodating pockets 21, the rod bodies 4 are accommodated in the four accommodating pockets 21, and each rod body 4 is tightened on the back surface of the frame body 3 through the plurality of tightening pieces 5.

The accommodating pockets 21 on the side of the flexible carrier 2 may be continuously arranged along the side, or may be intermittently arranged along the side; one side of the flexible carrier 2 corresponds to one rod body 4 so that the tensioning of one side is realized by one rod body 4.

In the embodiment of the present application, when the rod body 4 is tensioned by the tensioning members 5, as shown in fig. 1, one end of the tensioning member 5 may be connected to the rod body 4, and the other end of the tensioning member 5 is connected to the back surface of the frame body 3, that is, four side edges of the flexible carrier 2 are respectively connected to the back surface of the frame body 3 by the corresponding tensioning members 5, so as to tension the flexible carrier 2; of course, it may also be that one end of the tensioning member 5 is connected to the rod 4 corresponding to the first side of the flexible carrier 2, the other end of the tensioning member 5 is connected to the rod 4 corresponding to the second side of the flexible carrier 2, the first side is opposite to the second side, that is, two opposite sides of the four sides of the flexible carrier 2 are mutually tensioned by the tensioning member 5, so as to tension the flexible carrier 2.

Of course, in the embodiment of the present application, besides the two ways to achieve the tensioning of the flexible carrier 2, the tensioning of the flexible carrier 2 may also be achieved by other ways. Illustratively, one end of the tensioning member 5 is connected to the rod 4 corresponding to the first side of the flexible carrier 2, the other end of the tensioning member 5 is connected to the rod 4 corresponding to the third side of the flexible carrier 2, and the first side is adjacent to the third side, that is, two adjacent sides of the four sides of the flexible carrier 2 are mutually tensioned by the tensioning member 5, so as to tension the flexible carrier 2.

With respect to the above-described tensioning manner, in some embodiments, as shown in fig. 5, the tensioning member 5 is a tension spring 51. In this way, during the process of tensioning the flexible carrier 2, the extension spring 51 is in a stretched state, and the extension spring 51 can achieve tensioning of the flexible carrier 2 based on its own elastic force.

Illustratively, as shown in fig. 5, the tension member 5 is an extension spring 51, both ends of the extension spring 51 are provided with hooks, the back surface of the frame 3 is provided with a hanging groove 32, the hook at the first end of the extension spring 51 is hung on the hanging groove 32, the flexible carrier 2 is provided with a second through hole 22, and the hook at the second end of the extension spring 51 passes through the second through hole 22 and is hung on the rod 4.

In other embodiments, as shown in fig. 6, the tension member 5 is a rigid tension member 52, and the length of the rigid tension member 52 is adjustable. In this way, since the length of the rigid tension member 52 is adjustable, after one end of the rigid tension member 52 is connected to the rod 4 or the back of the frame 3, the length of the rigid tension member 52 can be adjusted, so as to adjust the tension of the rigid tension member 52 to the other rod 4, thereby tensioning the flexible carrier 2.

Illustratively, the rigid tension member 52 includes a first hook, a second hook, and a connecting member, wherein a hook end of the first hook is connected to the rod 4 or the back surface of the frame 3, a screw end of the first hook is screwed to a first end of the connecting member, a hook end of the second hook is connected to another rod 4, and a screw end of the second hook is screwed to a second end of the connecting member. Like this, can be relative first couple and second couple swivelling joint spare to the distance between first couple and the second couple is adjusted, thereby the adjustment is to the tautness of the body of rod 4, realizes the taut to flexible carrier 2.

Alternatively, in the case of the tightening manner in which one end of the tightening member 5 is connected to the rod body 4 and the other end of the tightening member 5 is connected to the rear surface of the frame body 3, the rigid tightening member 52 may have other structures in addition to the above-described structure. Illustratively, as shown in fig. 6, the rigid tension member 52 includes a clip 521 and an adjusting screw 522; the first end of the clamping bar 521 is connected with the rod body 4, the back of the frame body 3 is provided with a first through hole 31, and the adjusting screw 522 passes through the first through hole 31 and is in threaded connection with the second end of the clamping bar 521.

Wherein, the end of the adjusting screw 522 which is not connected with the clamping strip 521 is limited at the other side of the first through hole 31. In this way, the adjusting screw 522 can be rotated relative to the clip 521 to adjust the length of the rigid tension member 52, and thus the tension on the rod 4, so as to tension the flexible carrier 2.

Optionally, the first end of the clip bar 521 has a receiving groove 523, and the rod 4 is limited in the receiving groove 523 and can slide in the receiving groove 523. The accommodating groove 523 limits the local part of the rod 4 along the length direction of the tension member 5. Therefore, the clip strip 521 can be limited on the rod 4 by sliding from the end of the rod 4 based on the sliding of the rod 4 in the accommodating groove 523, and the position of the clip strip 521 in the length direction of the rod 4 can be adjusted at the same time.

The opening size of the accommodating groove 523 is smaller than the diameter of the rod body 4, so that the rod body 4 is limited in the accommodating groove 523. Of course, the rod body 4 may be limited in the containing groove 523 in other manners, which is not limited in the embodiment of the present application.

When the rod body 4 is limited in the accommodating groove 523, the accommodating pocket 21 at the edge of the flexible carrier 2 is also located in the accommodating groove 523, so that the opening side of the accommodating groove 523 inevitably contacts the flexible carrier 2. Like this, can set up the flexible pad at the opening side of storage tank 523 to the opening side of avoiding storage tank 523 through the flexible pad causes the fish tail to flexible carrier 2, thereby avoids flexible carrier 2 to take place the damaged condition.

Optionally, the first end of the clip strip 521 has a hook, the flexible carrier 2 has a second through hole 22, and the hook is hung on the rod 4 through the second through hole 22. In this way, the second through hole 22 can be provided at a position where the flexible carrier 2 needs to be tensioned, and then the hook of the clip strip 521 passes through the second through hole 22 to be hung on the rod body 4.

In the embodiment of the present application, when each side of the flexible carrier 2 is tensioned, the number of the tensioning members 5 is plural in order to ensure the flatness of the tensioned flexible carrier 2.

Illustratively, one side of the flexible carrier 2 is tensioned by three tensioning elements 5, i.e. three tensioning elements 5 are connected to the rod 4 of the one side. Three tension members 5 are uniformly distributed along the rod body 4, and one tension member 5 is connected to the middle of the rod body 4. In this way, in the case of an adjustable length of the tension member 5, the length of the tension member 5 located in the middle position can be adjusted first, so as to avoid the deflection of the rod body 4 and the wrinkling of the flexible carrier 2.

In the embodiment of the application, the one end of taut piece is connected with the body of rod of a side of flexible carrier, and the other end of taut piece is connected with the back of framework or the body of rod of the opposite side of flexible carrier to the roughness of flexible carrier has been guaranteed to the whole taut of four sides of realization to flexible carrier, and then the roughness of assurance curtain piece has avoided the relatively poor problem of curtain piece roughness because of the big cause of projection screen size. In addition, because the curtain sheet is fixed on the flexible carrier, the flexible carrier can avoid the phenomenon of expansion with heat and contraction with cold, thereby avoiding the situation of the curtain sheet bulging after the projection screen is used for a long time and prolonging the service life of the projection screen.

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

1. A projection screen, comprising: the curtain comprises a curtain sheet, a flexible carrier, a frame body, a rod body and a tensioning piece;

2. The projection screen of claim 1 wherein one end of the tension member is connected to the rods and the other end of the tension member is connected to the back of the frame.

3. A projection screen according to claim 2 wherein the tension member is a tension spring.

4. The projection screen of claim 2 wherein the tension members are rigid tension members, the length of the rigid tension members being adjustable.

5. The projection screen of claim 4 wherein the rigid tension member comprises a strap and an adjustment screw;

6. The projection screen of claim 5, wherein the first end of the bar clip has a receiving slot, and the rod is retained in the receiving slot and is capable of sliding in the receiving slot.

7. The projection screen of claim 6 wherein the open side of the receiving slot has a flexible pad.

8. The projection screen of claim 5 wherein the first end of the clip strip has a hook, the flexible carrier has a second through hole, and the hook is hooked on the rod through the second through hole.

9. The projection screen of claim 1 wherein one end of the tension member is attached to a rod corresponding to a first side of the flexible carrier and the other end of the tension member is attached to a rod corresponding to a second side of the flexible carrier, the first side being opposite the second side.

10. A projection screen according to any one of claims 1 to 9 wherein three of said tension members are connected to said rods.

11. A projection screen according to claim 10 wherein three of said tension members are evenly distributed along said rods.

12. A projection screen according to any one of claims 1 to 9 wherein the projection of the flexible carrier onto the plane of the sheet covers the sheet or covers four sides of the sheet.