JP3576298B2 - Screen device - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a projection screen (projection screen) device such as a television, a video projector, a projector, and a slide projector.
[0002]
[Prior art]
2. Description of the Related Art In recent years, projectors such as projection televisions have been reduced in size and weight as projection systems have been reduced in size.
Recently, even small projectors that can be placed on a desktop have been introduced, but these projectors are small and have no restrictions on where they can be used, and they can be used as reflective or transmissive projectors in personal rooms. Now you can.
Also, various measures have been taken to improve the image quality of the screen section used. For example, as for the configuration of the screen section, the image quality is improved by changing the configuration from a single film and lens sheet to a configuration of two or more sheets.
In addition, many screen devices for projectors have a structure in which the screen portion can be wound up when not in use. In particular, a reflection type screen device has a structure that can be wound up almost.
[0003]
However, in a screen device composed of a plurality of films and lens sheets and having a structure in which the screen portion can be wound up, the sheet is likely to be lifted and wrinkled, which causes a problem of lowering the image quality.
As a screen device having a winding structure, Japanese Unexamined Utility Model Publication No. Hei 6-10944 discloses a screen device in which a winding and storing mechanism is placed below and pulled up only when used. However, in the case of this apparatus, the screen unit can be wound up without a floating sheet and wrinkles. However, the screen unit made up of a plurality of films and lens sheets can be used. The structure is not intended for winding.
Japanese Patent Publication No. 6-58494 discloses a screen device comprising a plurality of films and lens sheets and having a structure capable of winding up a screen portion. A screen device of a type in which air or the like is pressed into the tube to expand it when using it is disclosed, but in the case of this type, wrinkles occur at the end when the screen part is wound up, The wrinkles cause wrinkles even when the screen is stretched and used, or only certain films and lens sheets float. As a result, the image quality was reduced.
[0004]
[Problems to be solved by the invention]
As described above, in a screen device having a structure capable of winding a screen portion including a plurality of films and lens sheets, there is no sheet floating or wrinkling caused by the winding, which is a problem in display image quality. Was required from.
The present invention is intended to provide a screen device having a structure capable of winding up a screen portion including a plurality of films and lens sheets under such circumstances, and in which floating and wrinkling of the sheet due to winding up do not occur. It is assumed that.
[0005]
[Means for Solving the Problems]
Screen device of the present invention, the adhesive provided on the outside the effective portion of the screen, is bonded to one, a plurality of films, winding housed substantially rectangular screen portion from one side thereof side consisting of sheets to a screen device, a holding fixture for fixing and holding the one side of the screen unit, and a take-up part for accommodating winding of the scan clean unit from the side opposite to the side where there is the holding fixture, the screen said plurality of films by the pressure-sensitive adhesive to parts when withdrawn from the take can up portion, and a bonding unit Ru bonding the sheets to one, the holding fixture at both ends when stretched the screen part the fixed provided a pair of stands for supporting the entire screen, the winding unit having a said film, winding drive unit the sheets are wound separately It is characterized in that that.
The above-mentioned pair of stands serves as a guide when expanding or storing the screen part by changing the distance in the up-down direction or the left-right direction by telescopic or folding while holding the holding and fixing part on both sides. Characterized in that,
The pair of stands are foldable, one end of which is detachably fitted and fixed to the holding and fixing part, and the other end is movably fixed to the winding drive part. It is assumed that.
And the pair of stands in the above is provided with a groove on the side surface of the screen, and when the screen part is extended, the end of the screen part fits in the groove of the stand. is there.
Further, in the above, the winding portion is provided with a stopper for preventing the screen portion from being pulled out excessively when the screen portion is extended.
In the above, the winding drive section is characterized by using a spring as a drive source.
When the holding and fixing portion is pulled and the screen portion 110 is pulled out from the winding portion and stretched, the screen portion is used for bonding each film and sheet provided near the screen portion drawing opening of the winding portion. A plurality of film sheets are bonded together by a bonding lip or a roll made of a scratch-resistant material such as a sponge roll, and an adhesive provided outside the effective portion of the screen.
[0006]
[Action]
The screen device of the present invention is configured as described above, and in a screen device having a structure capable of winding a screen portion including a plurality of films and lens sheets, floating and wrinkles of the sheet caused by the winding are reduced. It is assumed that there is no occurrence.
More specifically, when winding a screen section made up of a plurality of films and sheets, each film and sheet constituting the screen section are wound by a separate winding drive unit, thereby being wound by a conventional apparatus. In this case, it is possible to prevent the sheet from being lifted or wrinkled.
A pair of stands is used to extend or retract the screen unit while changing the vertical or horizontal distance from the winding unit of the holding / fixing unit in a telescopic or foldable manner while holding the holding / fixing unit on both sides. The pair of stands are foldable and one end is detachably fitted to and fixed to the holding and fixing portion, and the other end is movably fixed to the winding drive portion. By doing so, the whole structure is simple and compact.
Furthermore, a groove is provided on the side surface of the screen of the pair of stands, and when the screen part is extended, the end of the screen part is set in the groove of the stand. Good things.
The winding portion is provided with a stopper for preventing the screen portion from being pulled out excessively when the screen portion is extended, so that the screen portion is not damaged due to the excessive drawing.
In addition, since the winding drive unit uses a spring as a drive source, the winding drive unit can be used anywhere since it does not require an energy source such as a power source, and the structure of the drive unit itself can be simplified. .
[0007]
【Example】
An embodiment of the screen device of the present invention will be described with reference to the drawings.
FIG. 1A is a schematic perspective view of the screen device of the present embodiment in a state where a screen portion is extended, and FIG. 1B is a diagram in which the screen portion is wound from the near side of the screen portion 110 of FIG. FIG. 1 (c) shows the appearance of a take-up unit to be taken, and FIG. 1 (c) is a view corresponding to FIG. 1 (b), showing the inside of the take-up unit with the screen unit taken up. is there. FIG. 2A is a side view of the stand / guide 140 shown in FIG. 1A as viewed from the screen unit 110 side, and FIG. 2B is a side view of the stand / guide 140 viewed from the outside.
1 and 2, 100 is a screen device, 110 is a screen unit, 120 is a winding unit, 121 is a winding device, 122 is an exterior wall, 130 is a holding / fixing unit, 140 is a stand / guide, and 141 is a bending unit. , 141A are hinges, 142 is a groove, 143 is a groove for holding and fixing part, 144A and 144B are straight pillars, and 145 is a hinge.
The screen device of the present embodiment is a screen device in which a screen portion made up of two films and sheets is stretched and used as a screen, and the screen portion is wound and stored by a winding portion. As shown in a), when the screen unit 110 is extended, the screen unit 110 is fixed by the winding unit 120 on the lower side and fixed by the holding and fixing unit 130 on the upper side and is extended.
When the screen section 110 shown in FIG. 1 is extended, the entire upper end of the screen section 110 is pulled by the holding and fixing section 130, and the holding and fixing section 130 holds the stand / guide 140 shown in FIG. The fixing portion is fitted and fixed by the fixing portion receiving groove 143. Then, as will be described later, the film and sheet between the stoppers 126A and 126B and the holding and fixing portion shown in FIG. 3 are stretched, and the screen portion 110 is extended.
Then, as shown in FIG. 1C, when the screen unit 110 is wound up, the screen unit 110, the holding / fixing unit 130, and the stand / guide 140 are accommodated in the winding unit 120.
When winding, the stand / guide 140 is bent outward from the screen section 110 with the bent section 141 as a boundary. The bending portion 141 is capable of performing a bending operation by connecting the two straight column portions 144A and 144B of the stand / guide 140 by a hinge 141A on the outer side surface opposite to the screen 110 side. Then, as shown in FIG. 2, in the extended state, the end faces of the two straight column portions 144A and 144B are in contact with each other.
[0008]
In the holding / fixing portion receiving groove 143, the holding / fixing portion 130 is fixed by the stand / guide 140. However, the holding / fixing portion 130 is movable so as to correspond to the bending operation of the stand / guide 140. In the case of the present embodiment, The holding / fixing portion 130 is fitted in the holding / fixing portion receiving groove 143 of the stand / guide 140, and can be removed as needed. Then, as shown in FIG. 2A, the stand / guide 140 is also connected to the winding section by a hinge 145, and is movable so that the stand / guide 140 can be bent.
That is, the pair of stand and guides 140 are foldable, one end of which is detachably fitted and fixed to the holding and fixing portion, and the other end is movably fixed to the winding drive unit. Accordingly, even when the screen unit 110 is extended or wound, the whole unit is configured to move as a whole and has a compact structure in which the whole unit is integrated.
In the present embodiment, the stand / guide 140 is folded, but the structure is not limited to this.
[0009]
As shown in FIG. 2, the stand / guide 140 is provided with a groove 142 so that the screen does not come into contact with the screen during the stretching operation and the winding operation. 142 escapes to prevent contact between the screen unit 110 and the stand / guide 140.
2 (a), 2 (c), 2 (b), and 2 (c) show the cross-sectional shapes of the stand and guide in each section A1-A2, B1-B2, and C1-C2 in FIG. ) And (c).
[0010]
FIG. 3A is a cross-sectional view of the winding device 121 of the winding unit 120 shown in FIG. 1C taken along a line D1-D2 in FIG. 1C. The screen unit includes a film sheet 110A and a film sheet 110B. FIG. 11 is a view showing a state where 110 is expanded.
The film sheet 110A is taken up by a take-up drive unit 125A, and the film sheet 110B is taken up by a take-up drive unit 125B. At the time of extension, the screen unit 110 is prevented from being pulled out excessively. Stoppers 126A and 126B are provided.
The winding drive sections 125A and 125B are driven by a mainspring.
Reference numeral 127 denotes a bonding lip for bonding the screen while extending the screen. When the screen 110 is pulled out for spreading, the screen 110 is attached with an adhesive provided outside the effective area of the screen 110.
In this embodiment, a lip-type bonding jig is used, but the present invention is not limited to this. Alternatively, there is a method using sponge rolls 128A and 128B as shown in FIG.
[0011]
The holding and fixing portion 130 is partially shown in FIG.
As shown in FIG. 4A, the holding and fixing portion 130 includes a pair of a first member 131 and a second member 132 that are fitted to each other, and holds the end of the screen portion 110 including the film sheets 110A and 110B. , The recess 133 of the first member 131 and the projection 134 of the second member 132 are fitted to each other with the screen 110 interposed therebetween, and the first member 131 and the second member The screen portion is securely fixed to the holding / fixing portion 130 by fixing the screen portion to the holding portion 132. Then, a groove corresponding to the shape of the lens of the film sheet 110B is formed on the second member 132 side, and the groove is fitted to the lens of the film sheet 110B to further secure the screen 110. Reference numeral 135 denotes a stopper for holding the screen 110 between the holding and fixing portions 130.
As a material of the holding and fixing portion 130, a relatively hard resin with good dimensional accuracy such as polypropylene, ABS, and hard polyvinyl chloride is suitable.
The shape and configuration of the fixed holding section 130 are not particularly limited to those shown in FIG. FIG. 4B shows another example of the fixed holding unit.
4 (b) (a), 4 (b) (b), 4 (b) (c), like the one shown in FIG. 4 (a), the first member and the second member. 4 (b) and (d), the first member and the second member are integrally formed.
In FIG. 4B, 131A, 131B, 131C, and 131D are first members, 132A, 132B, 132C, and 132D are second members, 133A, 133B, 133C, and 133D are concave portions 134A, 134B, 134C, and 134D. The protrusions 135A, 135B, 135C, and 135D are stoppers, 136A, 136B, and 136C are fitting portions, and 137 is a fixture.
[0012]
Next, an operation of expanding the screen device 110 according to the present embodiment will be described with reference to FIGS.
First, from the state of FIG. 1 (c), the stand / guide 140 is extended as shown in FIG. 5 (a) while the screen unit 110 is pulled up by the holding / fixing unit 120, and then both ends of the holding / fixing unit 130 The guide 140 is hooked on the holding / receiving portion receiving groove 143 of the guide 140.
Next, the stand / guides 140 at both ends of the screen unit 110 are gradually extended until the space between them as shown in FIG. 5B.
Next, the stand / guide 140 at both ends of the screen unit 110 is further extended, and when the stand / guide 140 is completely extended, the expansion of the screen unit 110 is completed. (FIG. 1a)
When the stand / guide 140 is extended and the screen unit 110 is lifted, the screen unit 110 passes through a bonding lip 127 near the pull-up opening of the screen unit 110 of the winding device 120 shown in FIG. The two types of film sheets are bonded together by an adhesive provided outside.
The stoppers 126A and 126B shown in FIG. 3 are not installed so as to stop the drawer of the screen when the screen portion 110 is tight, but the stoppers finally reach the stand / guide 140 in the state of FIG. When the stoppers 126A and 126B are hooked, the film and the sheet after this point are not pulled out. Therefore, after the hook is held, the stand / guide 140 is extended right and left while holding the bent portion 141. extend.
[0013]
【effect】
As described above, the present invention provides a screen device that can wind up a screen portion made up of a plurality of films and lens sheets, and does not cause sheet floating or wrinkles due to winding up when the screen portion is extended. Can be provided.
In particular, the pair of stand and guides are foldable, one end of which is removably fitted and fixed to the holding and fixing part, and the other end is movably fixed to the winding drive part. Thus, the entire apparatus has a simple structure and is compact.
[Brief description of the drawings]
FIG. 1 is a view for explaining a screen device of an embodiment; FIG. 2 is a diagram of a stand / guide of the screen device of the embodiment; FIG. 3 is a cross-sectional view of a winding unit of the screen device of the embodiment; FIG. 5 is a view for explaining a holding and fixing portion of the screen device of the embodiment. FIG. 5 is a view for explaining a screen extending operation of the screen device of the embodiment.
REFERENCE SIGNS LIST 100 screen device 110 screen portion 120 take-up portion 121 take-up device 122 exterior walls 125A, 125B take-up drive portions 126A, 126B excessive lifting prevention stopper 127 bonding lips 128A, 128B sponge roll 130 holding and fixing portion 131 first member 132 Second member 133 Recess 134 Projection 135 Stopper 140 Stand / guide 141 Bend 141A Hinge 142 Groove 143 Retaining groove 144A, 144B Straight column 145 Hinge 131A, 131B, 131C, 131D First member 132A , 132B, 132C, 132D Second member 133A, 133B, 133C, 133D Recess 134A, 134B, 134C, 134D Projection 135A, 135B, 135C, 135D Stopper 36A, 136B, 136C fitting portion 137 fixture

Claims (6)

By adhesive provided on the outside the effective portion of the screen, is bonded to one, a plurality of films, the screen apparatus for winding accommodating a substantially rectangular screen portion from one side thereof side consisting of sheets, a holding fixture for fixing and holding the one side of the screen unit, and a take-up part for accommodating winding of the scan clean unit from the side opposite to the side where there is the holding fixture, the screen portion of the winding can up portion said plurality of films by the adhesive in deriving from, and sheets of laminated Ru bonding to one unit, the entire screen by fixing the holding fixture at both ends when stretched the screen part a pair of stands for supporting the providing, the winding unit is characterized by having the film, winding drive unit the sheets are wound separately scree Device. The pair of stands according to the first aspect serves as a guide when extending or storing the screen unit by changing the distance in the up-down direction or the left-right direction by telescopic or folding while holding the holding and fixing unit on both sides. A screen device characterized by the above-mentioned. The pair of stands according to claim 2 are foldable, one end of which is detachably fitted and fixed to the holding and fixing portion, and the other end is movably fixed to the winding drive portion. A screen device characterized by the above-mentioned. The pair of stands according to claims 1 to 3 are provided with a groove on the side surface of the screen, and when the screen part is extended, the end of the screen part fits in the groove of the stand. Screen device. 5. The screen device according to claim 1, wherein the winding portion is provided with a stopper for preventing the screen portion from being pulled out excessively when the screen portion is extended. 6. The screen device according to claim 1, wherein the winding drive unit uses a spring as a drive source.

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