JP2594358Y2 - Projection screen equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspension type projection screen device in a projection system such as a video projector, a projector and a phantom lamp.

[0002]

2. Description of the Related Art FIG. 5 shows a vertical sectional front view of an example of a suspended projection screen device. In this example, the screen winding drum is rotated forward and backward by a motor to rewind the screen to bring it into a suspended state, and conversely, to bring it up and into a retracted state.

[0003] Reference numeral 1 denotes a horizontally long screen storage box, which is mounted and supported on the upper part of a wall surface or a ceiling surface. Reference numerals 2 and 2 denote bearing members disposed on both left and right end portions of the storage box 1, respectively, and reference numeral 3 denotes a horizontally long screen winding drum rotatably supported between the bearing members 2.2. Reference numeral 4 denotes a motor for forward / reverse rotation of the screen winding drum 3, and reference numeral 5 denotes a wired or wireless remote controller for the motor 4. Reference numeral 6 denotes a flexible screen, the upper side of which is a screen winding cylinder 3.
It is locked to. Reference numeral 7 denotes a weight bar mounted along the lower side of the screen.

In use, when the motor 4 is rotated forward by the remote controller 5, the screen winding drum 3 rotates forward and the screen 6 wound on the winding drum 3 is rewound and descends from the storage box 1. The state shown in the figure is suspended. When not in use, when the motor 4 is reversed by the remote controller 5, the screen winding drum 3 is rotated in reverse, and the suspended screen 6 is wound on the winding drum 3 and stored in the storage box 1.

[0005] Some motors are provided with the motor 4 incorporated in the screen winding drum 3.

[0006] The screen winding drum 3 is urged to rotate in the screen winding direction by a spring member to move the screen 6 to the winding drum 3.
At the time of use, against the rotational urging force of the screen winding drum 3 in the screen winding direction during use.
There is also a manual type in which the screen 6 is pulled down by hand while being rotated to bring it into a suspended state, and when the screen is sufficiently pulled down, the return rotation of the winding drum 3 is locked.

Some screens 6 are wound around the winding drum 3 by hand, stored and stored. When used, the screen 6 is rewound and hung on a stand or a hook on a wall like a scroll.

[0008]

In the suspended projection screen apparatus as described above, in the suspended state of the screen, the central surface of the screen 6 tends to loosen and wrinkle as indicated by reference numeral 6a in FIG. This is because the screen winding cylinder 3 is bent (vented) by being slightly bent downward by weight between the bearing members 3 at the left and right ends, as shown by the two-dot chain line in an exaggerated manner. .

An object of the present invention is to prevent generation of loose wrinkles 6a on the surface of the suspension screen 6 due to the above-mentioned curvature of the winding drum 3 in the suspension type projection screen device.

[0010]

SUMMARY OF THE INVENTION The present invention is a projection screen device having the following configuration.

In the hanging projection screen device, a horizontal bar 8 is attached along the upper side of the screen 6.
The horizontal bar 8 is parallel to the axis of the screen winding drum 3 and the tension F is applied between both ends, and both ends are locked to the screen winding drum 3. Projection screen device.

<Operation> That is, in the suspended state of the screen where the screen 6 is sufficiently rewound, even if the winding drum 3 is curved downward, the horizontal bar 8 which directly locks the upper side of the screen 6 is used. Is applied with a tension F to lock both ends of the winding drum 3, so that the horizontal bar 8 is kept straight like a bowstring irrespective of the curvature of the winding drum 3 itself. Dripping. Therefore, loose wrinkles 6a on the surface of the hanging screen 6 due to the curvature of the winding drum 3
Is prevented from occurring.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is applied to the above-mentioned electric hanging projection screen apparatus shown in FIG. The same reference numerals are given to common constituent members and portions, and the description thereof will not be repeated. FIG.
FIG. 2 is an exploded perspective view of a main part, FIG. 2 is an enlarged cross-sectional view of the winding drum 3 when the screen 6 is rewound and suspended, FIG. (4)-
(4) It is a longitudinal cross-sectional view along a line.

The screen winding drum 3 is a pipe material made of aluminum in the present embodiment, and has a length dimension equal to or larger than the width dimension of the screen 6 (about 2 m in the present embodiment). A concave groove 3a is formed on the outer surface of the winding drum 3 along the length of the winding drum and parallel to the axis of the winding drum.

Reference numeral 8 denotes a horizontal bar attached along the upper side of the screen 6 by an appropriate means such as bonding, and is comparable to a metal bar or wire such as a steel or aluminum alloy having a high tensile strength, or a metal such as hard vinyl chloride. High-strength plastic material or the like having high strength.

The horizontal bar 8 on the upper side of the screen is fitted into the groove 3a of the screen winding drum 3, one end of the horizontal rod 8 is locked to the winding drum by a fixing pin 9, and the other end is pulled. It is pulled by a jig and tension F (for example, 5 to 1) is applied to the horizontal bar 8.
0 Kg), the other end of the horizontal bar 8 is locked to the winding drum by a fixing pin 9. Therefore, the upper side of the screen is locked to the winding drum 3 via the horizontal bar 8 having the both ends locked by applying tension F to the winding drum 3.

The screen 6 is wound around the winding drum 3 as shown by a two-dot chain line in FIG. When the winding drum 3 is driven forward, the winding drum 3 is rewound to a suspended state.

In the suspended state of the screen 6 where the screen 6 is sufficiently rewound, even if the above-described downward bending of the winding drum 3 occurs, the horizontal bar 8 that directly locks the upper side of the screen 6 generates the tension F. The horizontal bar 8 is attached to the winding drum 3 so that both ends are locked to the winding drum 3.
The straight state is maintained regardless of the curvature of itself.

Therefore, the occurrence of loose wrinkles 6a on the surface of the suspended screen 6 due to the curvature of the winding drum 3 in the suspended projection screen device is prevented.

The winding drum 3 is not provided with a groove 3a into which the screen horizontal rod 8 is fitted, and the horizontal rod 8 is made parallel to the axis of the winding drum and tension T is applied between both ends so that both ends are formed. Locking 9 may be provided on the outer surface of the winding drum.

The present invention can be applied to a manual type or a scroll type device to obtain the same effect.

[0022]

As described above, according to the present invention, the slack wrinkles 6a on the suspended screen surface due to the curvature of the winding drum 3 in the suspended projection screen device are prevented, and the intended purpose is improved. Can be reached.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part of an apparatus according to an embodiment.

FIG. 2 is an enlarged cross-sectional view of a winding drum portion in a screen rewind and suspended state.

FIG. 3 is an enlarged plan view of both end portions of the winding drum.

FIG. 4 is a longitudinal sectional view taken along line (4)-(4) in FIG. 3;

FIG. 5 is a vertical sectional front view of an example of a suspended projection screen device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Screen storage box 2 Bearing member 3 Screen winding drum 4 Screen winding drum drive motor 5 Remote controller 6 Screen 7 Weight horizontal bar 8 Horizontal bar material attached along the upper side of the screen 9 Stopping pin 6b Upper concave side of the screen

Claims (1)

(57) [Scope of request for utility model registration] In a hanging projection screen device, a horizontal bar (8) is attached along an upper side of a screen (6).
The horizontal bar 8 is parallel to the axis of the screen winding drum 3 and the tension F is applied between both ends, and both ends are locked to the screen winding drum 3. Projection screen device.