CN202548518U

CN202548518U - Integral rear-projection hard screen frame structure higher than 1.5 meters and wider than 4 meters

Info

Publication number: CN202548518U
Application number: CN2011205748152U
Authority: CN
Inventors: 潘元伟
Original assignee: ABEBE (GUANGZHOU) ELECTRONIC Co Ltd
Current assignee: ABEBE (GUANGZHOU) ELECTRONIC Co Ltd
Priority date: 2011-12-30
Filing date: 2011-12-30
Publication date: 2012-11-21
Anticipated expiration: 2021-12-30

Abstract

The utility model discloses an integral rear-projection hard screen frame structure higher than 1.5 meters and wider than 4 meters. The integral rear-projection hard screen frame structure comprises an integral rear-projection screen, a metal frame and bolts, the metal frame with a grooved section is fixed to the edge of the rear-projection screen, a PP (polypropylene) material layer is additionally mounted in the metal frame, the expansion coefficient of the PP material layer is as same as that of the rear-projection screen, first positioning holes with preset spaces are arranged on the whole metal frame, second positioning holes corresponding to the first positioning holes in position are arranged on the rear-projection screen, nuts are arranged at the top ends of the bolts, a spring is sleeved outside each bolt between the PP material layer and the corresponding nut, and the lower ends of the bolts sequentially penetrate through the PP material layer and the first positioning holes and are fixed to the second positioning holes. The problem of concave-convex deformation or shedding of a rear-projection screen of a rear-projection hard screen frame due to climatic change is avoided, and physical and optical effects of the rear-projection screen are ensured.

Description

The high wide hard curtain of whole rear-projection framed structure more than 4 meters more than 1.5 meters

Technical field

The utility model relates to hard curtain framed structure, the hard curtain framed structure of especially high wide whole rear-projection more than 4 meters more than 1.5 meters.

Background technology

In recent years, in the developing rapidly of projector, most of production firms and technician concentrate on sight more and adopt projecting piece formal, thereby make the rear-projection technology present development trend in the ascendant.See from practical application; Most engineering and project are increasing to the dimensional requirement of display screen at present; Adopt monolithic rear-projection or multi-disc even tens of screens can't satisfy actual needs; Even and adopt ABEBE super large edge to merge the curtain combination is the unique channel that addresses this problem. the edge merges and has occurred on the giant-screen of screen rear-projection unit because the temperature and humidity influence, and rear projection screen and framework expand with heat and contract with cold and be out of shape inconsistently, cause deformation of unevenness in the giant-screen.This problem has the performance of expanding with heat and contract with cold on screen frame, existing a kind of new technique solves, to reach the spy's reason and the optical effect of super large display screen.

At present, in the prior art, the splicing of multi-disc layer rear projection screen roughly has two kinds of methods both at home and abroad.First kind is the pin method, and promptly punching dowel silk interfixes between each monolithic screen sheet.This method is fairly simple, does not need attachment device, but can not accomplish the multilayer assembly unit, and the video wall piece is second-rate.Second kind is framework method; Promptly adopt special-purpose aluminium section bar to make box; Be used for fixing each piece rear projection screen mask; And each piece screen unit and box constitute an independent rear projection screen unit, according to actual needs independent rear projection screen unit are arranged by row and column successively then, and tipping is combined into the large screen back projection video wall.This method has overcome all shortcomings of pin method, is at present popular in the world advanced assembling method.But in the practice of framework method; Because the coefficient of thermal expansion and contraction of each material does not match; Add the characteristic of expanding with heat and contract with cold of screen itself; Therefore in use with the variation generation distortion in various degree of temperature and humidity, make screen sheet surface projection, depressed phenomenon occur, occur adverse consequencess such as crack, distortion between the unit.Finally cause the image straight line directly not wait the anamorphose phenomenon, directly influence the picture mosaic effect, greatly reduce and piece together the curtain quality, also can occur observing overdue when serious; And the screen of prior art all adopts optical lens such as Fei Nier lens and cylindrical mirror; Therefore each projector must project on the central point of each rear projection screen unit; Since can't deform in same pace, be complementary according to focal length and Fei Nier lens, and the light projection on its screen is also inhomogeneous; Make screen picture fuzzy, light and shade is inconsistent.

The utility model content

The purpose of the utility model is to overcome the independently rear-projection structure of rear projection screen unit formation giant-screen of prior art splicing polylith; Existence can't deform in same pace, out-of-flatness between the unit, influence the technical matters of picture mosaic effect, provides a kind of and do not need optical device, relies on material molecule solves the focusing of light and the problem of scattering, one whole corresponding many projector of hard curtain high wide whole the hard curtain of rear-projection framed structure more than 4 meters more than 1.5 meters.

For realizing above purpose; Technical scheme below the utility model has been taked: high wide whole the hard curtain of rear-projection framed structure more than 4 meters more than 1.5 meters, comprise a monoblock rear projection screen, be fixed on the metal frame on the rear projection screen edge; Said metal frame cross section is a Baltimore groove; Add the PP bed of material identical within it, on whole metal frame, maintain first pilot hole that has of preset space length, on rear projection screen, have and corresponding second pilot hole of first position of positioning hole with said rear projection screen expansion coefficient; Also include bolt; The bolt top is provided with nut, is with spring outside the bolt between the PP bed of material and nut, and the bolt lower end is passed the PP bed of material successively, first pilot hole is fixed in the second pilot hole place.

Because the PP bed of material has identical expansion coefficient with rear projection screen; Spring in conjunction with the tool Telescopic; And scalable is tightened up the bolt that loosens; The composition of these structures makes the hard act framework of the rear-projection of giant-screen under the situation of temperature or humidity variation, can not produce deformation and displacement, has kept the planarization of rear projection screen.

On said rear projection screen, be provided with the U-shaped spacer, also include rivet, it passes U-shaped spacer and rear projection screen and fixing.The purpose of U-shaped spacer is a positioning screen, prevents that rear projection screen from producing skew in metal frame.

Also include frame, frame one side is connected with metal frame, and bolt is covered in wherein, and opposite side is connected on the rear projection screen.

Remain with the adjustment space between said bolt and metal frame, the frame.

Said preset space length is 10 to 15cm.The setting of preset space length can be selected according to the size of the hard curtain of whole rear-projection framework.

The utility model compared with prior art; Have following advantage: the utility model does not adopt optical device; Rely on material molecule to solve in the physical optics structure in the past and focus on and the existing coarse problem of scattering,, do not have splicing construction owing to only adopt one whole hard curtain of rear-projection; And when expanding with heat and contract with cold; The PP material is consistent with the expansion coefficient of rear projection screen, has avoided the hard act framework of rear-projection because of the variation of weather causes the deformation of unevenness of rear projection screen or the problem that comes off, and has guaranteed the physics and the optical effect of rear projection screen.

Description of drawings

Fig. 1 is the utility model structural front view;

Fig. 2 is the A part enlarged diagram of Fig. 1;

Fig. 3 is bolt, spring, rear projection screen, metal frame unitized construction synoptic diagram.

Embodiment

Explain further details below in conjunction with accompanying drawing and embodiment content to the utility model.

Embodiment:

See also Fig. 1 to shown in Figure 3, high wide whole the hard curtain of rear-projection framed structure more than 4 meters more than 1.5 meters, it is a kind of framed structure that can expand with heat and contract with cold synchronously with rear projection screen; Comprise a monoblock rear projection screen 1, the material of this rear projection screen 1 is PVC or organic glass, is fixed on the metal frame 2 on the rear projection screen edge; Metal frame 2 cross sections are Baltimore groove; Add within it and the identical PP bed of material 3 of said rear projection screen 1 expansion coefficient, on whole metal frame 2, maintain first pilot hole 7 that has of preset space length, on rear projection screen 1, have and corresponding second pilot hole 12 in first pilot hole, 7 positions; Also include bolt 4; Bolt 4 tops are provided with nut 10, are with spring 5 outside the bolt 4 between the PP bed of material 3 and nut 10, and bolt 4 lower ends are passed the PP bed of material 3 successively, first pilot hole 7 is fixed in second pilot hole, 12 places.

Further, on rear projection screen, be provided with U-shaped spacer 8, also include rivet 9, it passes U-shaped spacer 8 and rear projection screen, plays the effect that rear projection screen is fixing.

Also include frame 6, frame 6 one sides are connected with metal frame 2, and bolt 4 is covered in wherein, and opposite side is connected on the rear projection screen 1.

Between bolt 4 and metal frame 2, frame 6, remain with adjustment space 11.

Preset space length can elect 10 to 15cm as according to the actual requirements.

Above-listed detailed description is to the specifying of the utility model possible embodiments, and this embodiment is not the claim in order to restriction the utility model, does not allly break away from the equivalence that the utility model does and implements or change, all should be contained in the claim of this case.

Claims

1. the high wide hard curtain of whole rear-projection framed structure more than 4 meters more than 5 meters; It is characterized in that: comprise a monoblock rear projection screen (1); Be fixed on the metal frame (2) on rear projection screen (1) edge, said metal frame (2) cross section is a Baltimore groove, adds the PP bed of material (3) identical with said rear projection screen (1) expansion coefficient within it; What on whole metal frame (2), maintain preset space length has first pilot hole (7); On rear projection screen (1), have and first pilot hole (7) corresponding second pilot hole in position (12), also include bolt (4), bolt (4) top is provided with nut (10); Be with spring (5) outside the bolt (4) between the PP bed of material (3) and nut (10), bolt (4) lower end is passed the PP bed of material (3), first pilot hole (7) successively and is fixed in second pilot hole (12) and locates.

2. the high wide hard curtain of whole rear-projection framed structure more than 4 meters more than 1.5 meters as claimed in claim 1; It is characterized in that: on said rear projection screen (1), be provided with U-shaped spacer (8); Also include rivet (9), it passes U-shaped spacer (8) and rear projection screen (1) and fixing.

3. the high wide hard curtain of whole rear-projection framed structure more than 4 meters more than 1.5 meters as claimed in claim 1; It is characterized in that: also include frame (6); Frame (6) one sides are connected with metal frame (2), and bolt (4) is covered in wherein, and opposite side is connected on the rear projection screen (1).

4. the high wide hard curtain of whole rear-projection framed structure more than 4 meters more than 1.5 meters as claimed in claim 3 is characterized in that: remain with between said bolt (4) and metal frame (2), the frame (6) and adjust space (11).

5. the high wide hard curtain of whole rear-projection framed structure more than 4 meters more than 1.5 meters as claimed in claim 1, it is characterized in that: said preset space length is 10 to 15cm.