JPH0114020Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is aimed at preventing sagging of the screen film and obtaining good images when the projection screen is stretched to form a curved surface in a roll-up type curved screen device. , relates to an assembleable roll-up type curved screen device in which a tension bar is attached to a screen frame.

2. Description of the Related Art Conventionally, screens on which images are projected by projectors and the like have generally been flat. However, in order for the viewer to view the entire image on the screen brightly, generally the left, right, top and bottom portions of the screen are tilted toward the viewer at a predetermined angle. However, tilting the screen at a predetermined angle is quite troublesome and difficult when using the screen.As a result, various ideas have been proposed, but it is almost impossible to tilt the screen at the left, right, top, and bottom at the same time. Nowadays, in order to brightly observe left and right images on a screen, there are appropriate technical means such as Japanese Patent Application No. 53-38592 (High Brightness Wide Diffusion Screen), in which lenticules with a satin-like surface are arranged vertically in series. Even in such a case, it is necessary to curve the screen surface vertically at a predetermined angle, which is extremely difficult to realize. This invention is suitable for not only such screens but also
It can also be used for general flat screens, and can be easily bent up and down at a predetermined angle when used.
Furthermore, the present invention provides a roll-up type curved screen device that can be stored in a roll-up storage box when not in use, and prevents the screen surface from sagging when extended and unfolded when in use, allowing the viewer to enjoy a good image. did.

The present invention was made in view of the above-mentioned defects, and includes a screen membrane with both left and right ends sandwiched in a predetermined gap as a guide, and two pairs of arcuate frame pieces forming the gap are detachably attached to the bottom plate. In addition, a roll-up storage box for the membrane is removably installed at the upper end of the frame piece, and a tension rod is removably attached to the rear of the arcuate frame piece, thereby preventing the screen membrane from sagging. The present invention provides a curved screen device of the above type.

The present invention will be explained below according to one embodiment. 1st
The figure is a front view, and FIG. 2 is a side view from AA view. 1 is a screen film, 2a, 2b, 2
2a and 2b are arcuate frame pieces, each of which is curved in the vertical direction, and has a configuration in which both left and right ends of the membrane 1 are sandwiched and guided between the pieces 2a and 2b, and also supported when the membrane 1 is at a predetermined position. has. 3 is a bottom plate, and the lower ends of the arcuate frame pieces 2a, 2b are attached to the bottom plate 3 with screws 3a while keeping an appropriate distance between them using brackets 2c. Near the center of the bottom plate 3, there is a membrane fastener 3b. The bottom plate 3 has a box configuration, and the bow-shaped frame pieces 2a, 2b, etc. can be stored therein during transportation by opening the lid 3c.
4 is a storage box for rolling up the membrane 1, and a rod 5 for rolling up the membrane 1 is attached to both ends of the box 4a by bearings 5a, 5a. The rod 5 always holds the membrane 1 in the winding direction by means of a helical spring device (not shown). The upper end of the membrane 1 is fixed to a rod 5, and the lower end of the membrane 1 is provided with a reinforcing edge 1a and a handle 1b so that the membrane can be easily pulled out. When the membrane 1 is pulled out for use, the hole in the handle 1b is inserted into the membrane fastener 3b.
Fit it into. FIGS. 1 and 2 show this state. The box 4a is attached to the arcuate frame pieces 2a,
2b with screws 6c. Reference numeral 7 denotes a tension rod, which is fixed to the rear of the arcuate frame pieces 2b, 2b with screws 7b. The tension rod 7 is a turnbuckle 7a consisting of left and right threaded rods and a nut, and the rotation of the nut pushes the arcuate frame pieces 2a, 2b outward and spreads them apart. By pulling the handle 1b' (position when the membrane 1 is rolled up) from the rolled up state of the membrane 1,
Both left and right ends of the membrane 1 are guided through the gap between the arcuate frame pieces 2a and 2b, and the membrane 1 reaches the bottom, and when the membrane 1 becomes slack when the hole of the handle 1b is fitted into the membrane clasp 3b. , frame pieces 2a, 2 by turnbuckle 7a
If b is pushed outward, the sagging of the membrane 1 disappears and a uniform curved surface can be obtained. The force that pulls the membrane 1 outward is exerted by the frictional force when the membrane 1 is sandwiched between the frame pieces 2a and 2b. However, if the frictional force is insufficient depending on the material, both the left and right ends of the membrane 1 It is also possible to use the wedge-shaped effect by thickening the membrane 1, or by attaching wing nuts and bolts to the frame pieces 2a and 2b.
There is also a way to tighten it.

The present invention has the above-mentioned structure and function, and by pulling the handle 1b' of the membrane 1 rolled up in the upper winding device downward, the left and right ends of the membrane 1 can be moved through the gap between the arcuate frame pieces 2a and 2b. guided by the lower end 1a of the membrane 1
reaches the position of the bottom plate 3, and by fitting the hole of the handle 1b into the membrane fastener 3b, the membrane 1 is attached to the frame pieces 2a, 2.
It is attached to b. In this case, if sagging occurs on the surface of the membrane 1, the frame pieces 2a, 2b are pushed outward by operating the turnbuckle 7a,
Sagging can be eliminated and a uniform curved surface can be obtained.

In the above embodiment, the screen membrane winding device is located at the top and the membrane is pulled down and stretched.
Conversely, when the screen membrane winding device is located at the bottom and the membrane is pulled up and stretched, the same structural effect as described above is obtained.

As described above, the present invention makes it possible to obtain a screen having a uniformly curved surface curved in the vertical direction, so that the reflected light rays of the projected image are
The effect of focusing light in the vertical direction can be obtained. Moreover, since it is an assembly type, it is easy to move and the screen can be used wherever the user desires.

[Brief explanation of drawings]

Figure 1 is a front view showing one embodiment of the present invention;
The figure is a side view taken along the line A--A in FIG. 1, and FIG. 3 is a partial view showing the screen membrane. 1...Screen membrane, 1a...Reinforcement edge, 1b...
...Handle, 2a, 2b...Archive-shaped frame piece, 2c...Holder, 3...Bottom plate, 3a...Screw, 3b...Membrane fastener, 3c...Lid, 4...Rolling device, 4a...
Box, 5... Membrane winding rod, 5a... Bearing, 6a, 6b...
...Mounting tool, 6c...screw, 7...tension rod,
7a... Turnbuckle, 7b... Screw.

Claims (1)

[Scope of utility model registration request] The left and right ends of the screen membrane are guided through gaps formed by the arcuate frame pieces that form the screen frame, and two pairs of arcuate frame pieces that support the two ends are removably attached to the bottom plate, and A roll-up type curved screen device characterized in that a storage box for rolling up and storing the membrane is removably installed at the upper end, and a tension rod is removably attached to the rear of the arcuate frame piece.