JPH0114021Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a projection screen device for projecting images projected by a projector such as a video projector, and particularly to a screen device that is easy to carry.

2. Description of the Related Art Conventionally, for example, a projection screen device shown in FIG. 1 has been known as a projection screen device for projecting images projected by a video projector. This screen device 100 includes a screen reflective foil 101 made of aluminum foil, and a plate-shaped support block 102 that supports a reflective surface 101A of the reflective foil 101 in a spherically curved state. . The block 102 is formed of, for example, foamed polystyrene, and its thickness t is larger than the maximum vertical depth h of the reflective surface 101A in order to curve the reflective surface 101A.

As shown in FIG. 2, the screen device 100 sets a predetermined inclination angle θ ₁ so that the image projected by the video projector 103 has optimal brightness for the viewer 104. It is installed tilted forward.

Incidentally, the size of the reflective surface 101A of the screen device 100 is often 50 to 100 inches, and it is quite difficult for one person to carry the entire screen device 100 and attach it to a wall or the like. Therefore, even when the screen device 100 is not in use, it is left in the same installed state as when in use, and the actual situation is that the installation location of the device 100 is not used effectively.

Therefore, the present invention has been proposed in view of the conventional situation, and is easy to carry and can be easily attached to a wall or the like.
The purpose is to provide a new projection screen device.

Hereinafter, one embodiment of the present invention will be described in detail with reference to FIGS. 3 to 11.

FIG. 3 is an external perspective view of the projection screen device according to the present invention viewed from the front side. This screen device 1 uses an aluminum foil 2 having the characteristics shown in FIG. 4 as a reflective foil for the screen.

As shown in Figure 4, the aluminum foil 2 has anisotropic reflection directivity, and in particular, the gain in the horizontal direction decreases as the directivity angle increases compared to the commonly used aluminum foil. It has the property of having less In Figure 4, the horizontal axis indicates the directivity angle from the viewer, 0° indicates the central position of the reflecting surface, and the vertical axis indicates the screen gain, with 0 times being total reflection. It indicates the condition. Further, in FIG. 4, H indicates the characteristics of the aluminum foil 2 in the horizontal direction, and V indicates the characteristics of the aluminum foil 2 in the vertical direction.

The aluminum foil 2 having the above characteristics is adhered to the surface 4A of the flexible base sheet 4 with an adhesive 3, as also shown in FIG. The sheet 4 is formed of, for example, vinyl chloride, cloth, polyethylene, or the like.

Attached to the upper and lower edges 4a, 4b of the sheet 4 are frames 5, 6 made of highly rigid round bars. Each of these frames 5, 6 has the above-mentioned respective end edges 4a,
4b is for reinforcing it so that it is stretched in a straight line.

Further, as shown in FIG. 6, on both left and right sides 40 and 41 of the back surface 4B side of the sheet 4, elongated leaf springs 8, which serve as sheet reinforcing members having elasticity to tension the sheet 4 in a flat shape, are provided. , 8 are placed over the entire length of the top and bottom of the sheet 4.
It is attached by. Each of the above-mentioned leaf springs 8, 8 is made of iron, stainless steel, polypropylene, etc. and is made of extremely thin material.

Moreover, both ends 5a, 5b, 6 of each of the above-mentioned frames 5, 6
a, 6b, shaft-like protrusions 10, 10, 11, 11
is provided protrudingly, and between the opposing protrusions 5a, 6a, 5b, 6b of each of the frames 5, 6 is an operating string 1 which serves as an operating member when bending the sheet 4.
2 and 13 are being constructed. In addition, each of these strings 1
2 and 13 constitute a seat support means 50.

Ends 12a, 12b, 1 of each of the strings 12, 13
3a, 13b either above or below the sheet 4, and pull both the upper and lower ends 4a, 4b of the sheet 4 in directions facing each other to tie each of these strings 12, 13. Each end 12a,
When the lengths between 12b, 13a, and 13b are shortened and fixed, the sheet 4 is curved due to the presence of the leaf springs 8, 8, and the reflective surface 2A of the aluminum foil 2 is turned into a concave cylindrical surface. We support it so that it becomes.

In addition, the sheet 4 by each of the strings 12 and 13
When the upper and lower edges 4a, 4b of the sheet 4 are released from the tensioned state, the sheet 4 is released from the respective leaf springs 8, 8.
Due to the presence of , it returns elastically and is supported in a flat shape. Therefore, as shown in FIG. 7, the sheet 4 can be wound and stored in a roll using one of the frames 5, 6 as a core rod.

As shown in FIG. 8, instead of the leaf spring 8, elastic spring members 14, 14, such as piano wire, are provided inside the sheet 4 and extend in the vertical direction of the sheet 4. The sheet 4 may be insert-molded, and various modifications are possible as long as it has the elasticity to stretch the sheet 4 into a flat shape.

Further, each of the shaft-like protrusions 10, 10, 11, 11
Hanging strings 15 and 16 for suspending the sheet 4 from a wall (not shown) are installed between them with appropriate slack. And each of the above strings 15,1
6 are tied at approximately the center of the back surface 4B of the sheet 4, and a hook 17 is attached to this binding area, as shown in FIG. In addition, in place of the hook 17, each of the strings 1
Strings, wires, or the like may be used for the binding portions 5 and 16.

Then, a screen device 1 having the above configuration is provided.
As shown in FIG. 10, while the sheet 4 is curved and supported, the hook 17 is relatively engaged with a ring-shaped receiving member 19 provided on the wall 18, and the lower edge of the sheet 4 is By bringing the one frame 6 attached to the screen 4b into contact with the wall surface 18A, the screen device 1 can be installed forward at a predetermined inclination angle θ ₂ . By installing the screen device 1 in this way, the viewer 104 can see the image projected and projected from the projector 103 in the same way as in the past.

Note that when the screen device 1 is not used temporarily, the sheet 4 can be attached to the wall surface 18A by the leaf springs 8, 8 by releasing the support state by the operation strings 12, 13. It can be closely supported. Therefore, the depth d of the screen device 1 is almost eliminated, and the installation location of the screen device 1 can be used effectively.

Moreover, as shown in FIG.
If the vertical distance l ₁ of the hanging string 15 installed between the frames 10 and 10 to the hanging hook 17 is made longer than the vertical distance l ₂ of the string 16 on one frame 6 side to the hook 17, this can be achieved. The forward inclination angle θ ₂ of the screen device 1 can be made large, and the forward inclination angle θ ₂ of the screen device 1 can be variably adjusted depending on the viewing location of the viewers 104 or the number of people.

Furthermore, by adjusting the amount of tension of the operating strings 12 and 13, the curvature of the reflective surface 2A can be variably adjusted, so that the screen is not limited to the installation location of the projector 103. The installation location of the projector 103 can be arbitrarily set according to the installation environment of the device 1.

As described above, according to the above embodiment, the latching hook 17 is relatively engaged with the hook receiving member 19 provided on the wall 18, and the operating strings 12 and 13 are pulled upward or downward. The curved screen can be attached to the wall simply by tensioning it, and the installation work of the screen device 1 can be easily performed. In addition, the above hook 1
The screen device 1 can be installed anywhere where a member for receiving the screen 7 is provided.

When the screen device 1 is not used, the hook 17 is removed from the hook receiving member 19, the operating strings 12 and 13 are loosened, the sheet 4 is made flat, and the sheet 4 is flattened. 4 can be rolled up and stored. Therefore, the screen device 1 can be made compact and can be easily carried. It also saves space for storage.

As is clear from the above description, the present invention consists of a flexible base sheet with a screen reflective foil pasted on its surface, a frame attached to the upper and lower edges of this base sheet, and the above sheet stretched in a flat shape. a sheet reinforcing member having a rectifying spring; and supporting the sheet so that the reflective surface of the reflective foil becomes a concave cylindrical surface when the sheet is bent in the vertical direction against the resilient force of the reinforcing member. When not in use, the sheet can be rolled up and stored to make it compact, making it easy to carry.
Furthermore, when using the screen device, it can be installed in a state where images can be easily projected using the sheet support means. That is, since the screen device can be easily attached and removed, the screen device can be installed only when in use, and the installation space can be used effectively.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal side view showing a conventional projection screen device, FIG. 2 is a longitudinal side view showing its usage, FIGS. 3 to 11 show an embodiment of the present invention, and FIG. Fig. 4 is a characteristic diagram of the aluminum foil used as the reflective foil for the screen, Fig. 5 is a cross-sectional plan view of the base sheet, and Fig. 6 is the back side of the screen device for projection. 7 is a perspective view showing a state in which the base sheet is wound; FIG. 8 is a sectional view showing a modified example of the base sheet; FIG. 9 is a side view of the screen device; Figures 10 and 11
The figure is a side view showing how the screen device is used. DESCRIPTION OF SYMBOLS 1... Projection screen device, 2... Aluminum foil, 2A... Reflective surface, 4... Flexible base sheet, 4a... Upper edge, 4b... Lower edge, 5, 6...
... Frame body, 8 ... Leaf spring, 14 ... Spring member, 50
... Seat support means.

Claims (1)

[Scope of utility model registration request] A flexible base sheet with a screen reflective foil adhered to its surface, a frame attached to the upper and lower edges of this base sheet, a sheet reinforcing member having elasticity to stretch the sheet into a flat shape, and this reinforcing member. and sheet supporting means for supporting the sheet so that the reflective surface of the reflective foil becomes a concave cylindrical surface when the sheet is curved in the vertical direction against the elastic force of the reflective foil. Projection screen device.