JPH09311385A - Portable reflection type screen - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of curling due to a level difference between a screen film and a skirt film by sticking plural curl habit preventive pieces on the rear of the stuck part of the screen film and the skirt film so that the straightening pieces may be separated at a prescribed distance. SOLUTION: The upper edge part of the skirt film 13 is adhered to all the length of the rear of the lower edge part of the screen film 12 in width of about 8mm by adhesive material 42 such as double coated adhesive tape. At the adhered part where the screen film 12 and the skirt film 13 are laid to overlap each other, the level difference 44 is inevitably generated, and the screen film 12 and the skirt film 13 wound around a spring roll at storing are affected by the level difference 44, then, the films are curled. Then, by adhering plural pieces 46 and 48 for straightening curls to the rear of the adhered part of the screen film 12 and the skirt film 13 by adhesive material 50 such as double coated adhesive tape, curling caused by the level difference 44 is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen for enlarging and projecting an image displayed by a projection TV or a projector, and more particularly to a portable and portable reflective screen for observing a reflective projection image.

[0002]

2. Description of the Related Art An image from a projector including a projection TV is generally displayed by being magnified and projected on a reflection type screen or a transmission type screen.

Among the reflection type screens that are used by being attached to the ceiling or the wall surface, generally, the screen film housed in the housing case is used by descending it electrically or manually as needed. Further, the hanging screen or the tripod stand type screen is used by hanging it on a predetermined place or placing it on the floor.

Further, a portable screen in which a screen film wound around a roller is stored in a storage case has been proposed, and the storage case is installed at an arbitrary place, and, for example, a biasing force of a spring is utilized by a pantograph. The screen film was raised and used.

[0005]

Among the above-mentioned reflection type screens, a roll-up or roll-up screen excellent in storability generally comprises a screen film and a winding shaft around which the screen film is wound. One end of the screen film is attached to the circumferential surface of the winding shaft in the axial direction.

However, a slight step is formed between one end of the screen film attached to the take-up shaft and the peripheral surface of the take-up shaft, and the screen film surface wound around the take-up shaft has an axial direction of the take-up shaft. There is a tendency for a strip-shaped curl parallel to. This curl cannot be easily removed even when the screen film is flat when the screen is used, and there is a problem that the quality of the projected image is deteriorated.

The reflection type screen described in JP-A-7-209750 or JP-A-7-209751 is provided with a thick portion having a predetermined width at both end portions orthogonal to the winding axis of the screen film, or Protrusions are provided on the peripheral surfaces of both ends of the winding shaft to prevent the winding tendency, thereby preventing deterioration of the image quality of the projected image.

However, in a portable screen that can be installed at any place, a skirt film is attached to the lower part of the screen film with double-sided tape or the like, and the lower end of the skirt film is joined to the winding shaft. There is also a problem in that a streak-like curl is generated on the surface of the screen film due to the occurrence of a step similar to the above-mentioned step at the bonded portion between the screen film and the skirt film.

The present invention has been made in view of the above problems of the prior art, and has a screen body in which a skirt film is attached to a screen film,
An object of the present invention is to provide a portable reflection type screen in which a curl does not occur due to a step between the screen film and the skirt film.

[0010]

In order to achieve the above object, the portable reflection type screen according to claim 1 of the present invention is a storage case and is rotatably attached to the storage case. While the screen film is wound, a roll biased by a spring, a hanger bar to which one end of the screen film is attached, and a rotatable position between a storage position and an upright position substantially vertical to the storage position. A base end is pivotally attached near both ends of the storage case, and two sets of retractable lifting means having holding means for holding the hanger bar in an upright position are provided, and the other end of the screen film is attached to one end of the skirt film. And the other end of the skirt film is adhered to the roll, and a plurality of curl prevention pieces are separated from the screen film and the skirt film on the back surface of the adhered portion by a predetermined distance. By attaching, characterized in that to prevent core set curl caused by the step formed by the bond portion.

The invention according to claim 2 is characterized in that the curl prevention piece is adhered to both ends of the sticking portion in a direction orthogonal to the sticking portion, and two first curl preventing pieces are provided. It is characterized in that it is constituted by a plurality of second curl preventing pieces which are adhered along the above-mentioned adhering portion at a predetermined interval between the one curl preventing pieces.

Further, the invention according to claim 3 is characterized in that the first and second curl preventing pieces are made of foamed polyethylene.

Further, in the invention according to claim 4, the third curl preventing piece is adhered along the both ends of the screen film from the hanger bar to the sticking portion, and the first curl preventing piece is adhered to the above-mentioned curl preventive piece. It is characterized in that it is attached to the lower end of the third curl prevention piece.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. Projection T
V or projectors generally include at least one light source and an optical system that converts light from the light source into a predetermined light flux.
It is composed of at least one display panel on which the light flux from the optical system is displayed, and a display image formed on the display panel is enlarged and projected on a reflective or transmissive screen surface.

The portable reflection type screen according to the present invention is installed, for example, in front of the projector at a position separated by a predetermined distance, and magnifies and reflects a display image of the projector to project an image on the screen surface. The distance between the screen and the projector is appropriately selected according to the type and size of the projector.

FIG. 1 shows an aluminum storage case 2 of a portable reflection type screen according to the present invention.
Members such as a screen film for projecting a display image of the projector, a spring roll (winding shaft) around which the screen film is wound, and a pole for holding the screen film substantially vertically are housed in the housing case 2. The handle 4 attached to the case can be freely carried to any place.

As shown in FIGS. 1 and 2, the storage case 2 includes a lower case 2a, an upper case 2b pivotally attached to the lower case 2a, and a pair of caps screwed to both ends of the lower case 2a. It is composed of three. Upper case 2b
A lock 6 is screwed to the central edge of the open side of the lock 6, and the protrusion 6a formed at the tip of the lock 6 is attached to the lower case 2
The opening of the lower case 2a can be closed by the upper case 2b by fitting it into the recess 2c formed on the upper edge of the handle side wall of a, and the fitting between the projection 6a and the recess 2c can be released. By doing so, the lower case 2a can be opened. The number of locks 6 may be one as shown in the figure, but two may be provided and the number thereof is appropriately selected.

At the bottom of the lower case 2a is provided a pair of rotary legs 8 spaced apart in the longitudinal direction. Each rotary leg 8 is provided with a plate-shaped leg portion 8a and the leg portion 8a so as to stand upright. Rod 8b inserted into the hole formed in 2a, and washer 8 fixed to the upper end of rod 8b
c. A coil spring 10 is interposed between the bottom of the lower case 2a and the washer 8c so as to surround the rod 8b, and the coil spring 10 constantly urges the rotary leg 8 upward. . The leg 8a of the rotary leg 8 is normally housed in a recess 2d formed in the bottom of the lower case 2a along the longitudinal direction of the lower case 2a. However, when the screen is used, the leg 8a is moved downward. By pulling and rotating 90 degrees, the screen body including the storage case 2 can be stably held at a predetermined place. still,
Two hemispherical protrusions 8d are formed on the leg portion 8a of each rotary leg 8, and the leg portion 8a is attached to the storage case 2 by nine.
When rotated by 0 degrees, the protrusion 8d engages with the outer edge of the bottom portion of the lower case, and the leg portion 8a is fixed at that position (see FIG. 4). Further, rubber caps 11 for protecting the screen installation surface are attached to both ends of each leg portion 8a.

As shown in FIGS. 2, 3 and 4, the storage case 2 includes a screen film 12 and a spring roll 14 wound with a skirt film 13 attached to the lower edge of the screen film 12. A pair of telescopic lifting poles 16 for holding the screen film 12 and the skirt film 13 in an upright position and a hanger bar 18 to which the upper edge of the screen film 12 is attached are stored. In FIG. 2, the pair of elevating type poles 16 are arranged on the same straight line in the longitudinal direction of the storage case 2 and at substantially the same level as the spring roll 14, and the hanger bar 18 is
It is arranged diagonally above the spring roll 14 and the lifting pole 16. Further, since the elevating pole 16 is stored in a contracted state, the above-mentioned members can be compactly stored in the relatively small storage case 2.

The hanger bar 18 is supported by a pair of hanger bar receivers 19 projecting substantially vertically from both end caps 3 when stored in the storage case 2, and is formed on the upper end of the hanger bar receiver 19. It is held by the protrusion 19a.

The spring roll 14 is a hollow cylinder, and both ends thereof are rotatably attached to a pair of brackets 22 shown in FIGS. 5 and 6 via bearings 20.
The lower edge portion of the skirt film 13 formed integrally with the screen film 12 for projecting an image from the projector is adhered to the longitudinal direction of the spring roll 14 by a double-sided tape. Most of the skirt film 13 is wound around the spring roll 14. The spring roll 14
A built-in coil spring (not shown) constantly urges the screen film 12 and the skirt film 13 to have a predetermined tension when used, and at the time of storage, the screen film 12 and the skirt film 13 are stored. The winding of 13 around the spring roll 14 is facilitated.

The bracket 22 is formed by the spring roll 14
Also, a spring roll bracket 22a having a flat plate shape and a pole bracket 22b having a U-shaped cross section are screwed to the bottom portion of the storage case 2 to pivotally support the lifting pole 16.
It has. Horizontally extending slits 22c are formed on opposite side walls of the pole bracket 22b, and corrugated locking portions 22d, which will be described later, are formed on the tip ends of the side walls located above the slits 22c. There is.

As shown in FIG. 7, a hanger bar 18 is provided.
Is the first bar segment 18a and the second bar segment 1
8b is an aluminum hollow cylindrical body in which the first and second bar segments 18a, 18b are fitted to each other along the longitudinal direction at two locations, a central portion and a circumferential portion. The side edges of the first and second bar segments 18a and 18b facing each other form a clamp portion 18c, and the upper edge of the screen film 12 is clamped by the clamp portion 18c. Caps 26 are attached to both ends of the hanger bar 18.

Although the lower edge of the skirt film 13 is adhered to the spring roll 14 with double-sided tape, it may be fixed to the spring roll 14 like the upper edge of the screen film 12.

The hanger bar 18 is not limited to the two-divided structure as shown in FIG. 7, but may be a hollow cylindrical body having an integral structure. In this case, screen film 1
The upper edge of 2 is attached to the hanger bar 18 with, for example, double-sided tape.

8 and 9 show the lifting poles 16, and as shown in both figures, each lifting pole 16 is
The first pole 16a, the second pole 16b slidably accommodated in the first pole 16a, and the second pole 1
6b and a third pole 16c slidably accommodated in the inside of 6b, a bar clip 28 is attached to the tip of the third pole 16c, and the base end of the first pole 16a opposite to the bar clip 28 is attached. A pole support 30 is attached to the. Also, the first and second poles 16a, 1
At the tip of 6b, the first and second pole grips 34a, 3
4b are respectively pivotally attached, and the second pole 16b can be arbitrarily attached to the first pole 16a and the third pole 16c can be arbitrarily attached to the second pole 16b by a cam mechanism incorporated in the pole grips 34a and 34b. It is possible to fix it at the position. Further, stoppers (not shown) are provided at the base ends of the second pole 16b and the third pole 16c, respectively, to separate the second pole 16b from the first pole 16a or the third pole 16c. It prevents the player from leaving the two poles 16b.

The lifting pole 16 is not limited to the above-mentioned three-step lifting pole, but may be a four-step lifting pole, and the number of poles may be increased or decreased depending on the size of the screen film 12. To be done.

A locked portion 30a having a semicircular cross section shown in FIG. 10 is formed at a position separated from the pin 32 on both sides of the pole support by a predetermined distance. When the pole 16 is erected upright, this locked portion 30a is formed. By fitting the locking portion 30a with the corrugated locking portion 22d of the pole bracket 22b shown in FIG. 5, the pole 16 is held in the upright position. At this time, since the flat portion 32 formed on the opposite side of the pole 16 of the pole support 30 is set to abut and make surface contact with the upper surface of the bracket 22, the pole 16 is held in a stable state.

The bar clip 28 attached to the tip of the third pole 16c is formed with two slits 28a on both sides thereof.
The portion sandwiched by a is a clip portion 28b that holds the cap 26 that is capped on the end portion of the hanger bar 18. As shown in FIG. 11, a convex portion 28c protruding inward is formed at the tip of the clip portion 28b, and the interval between the opposing convex portions 28c is set to be slightly shorter than the diameter of the bar cap 26. There is. Therefore, when the lifting pole 16 is in the upright position, the bar cap 26
When the bar clip 28 is pressed against the bar clip 28 from above, the opposing clip portion 28b is slightly opened, and the bar cap 26 is held inside the bar clip 28.

The bar clip 28 has a support shaft 28d.
Has a spring pin 29 that is press-fitted into a hole 28e that is bored in the diametrical direction, and one end of the spring pin 29 and a long hole (not shown) formed in the third pole 16c of the lifting pole 16 are By engaging, the bar clip 28
Is held by the third pole 16c and is rotatable within a predetermined angle range.

In the retracted position, the lifting pole 16 is
It is held by the pole holder 36 shown in FIG. The pole holder 36 is screwed onto the bottom of the storage case 2 and has two opposing holding portions 36a. The interval between the inwardly projecting convex portions 36b formed on the holding portion 36a is set to be slightly shorter than the diameter of the first pole 16a, and when the pole 16 is pressed against the pole holder 36 from above, the holding portions facing each other are provided. 36a has expanded a little and Paul 1
6 is held inside the pole holder 36.

As shown in FIGS. 2 and 4,
A partition wall 38 is erected between the spring roll 14 around which the screen film 12 and the skirt film 13 are wound and the elevating pole 16, and the screen film 12, the skirt film 13 and the elevating pole 16 are provided.
This prevents interference with the pole grips 34a and 34b provided on the.

However, the partition wall 38 is not always necessary and can be omitted by appropriately selecting the mounting positions of the pole grips 34a and 34b.

The screen film 12 is preferably an aluminum polarizing film composed of a light diffusing layer, a polarizing film layer, an adhesive layer, a light reflecting layer, a substrate layer and a black back coating layer in this order, but this film is not always required. It is not limited to.

As the skirt film 13 attached to the screen film 12, a PE having a thickness of about 100 μm is used.
A T film is used, and dot-extraction printing is performed on this film. For example, a dot pattern is formed in which countless dots having a diameter of 0.5 mm are arranged at a pitch of 3 mm in length and width.

FIGS. 13 and 14 show the adhered portion between the screen film 12 and the skirt film 13,
The back surface of the lower edge of the screen film 12 has a width of about 8 mm over its entire length, and an adhesive 42 such as double-sided tape is used.
The upper edge of the skirt film 13 is thus adhered. A step 44 inevitably occurs at the portion where the screen film 12 and the skirt film 13 overlap each other, and the screen film 12 and the skirt film 13 wound around the spring roll 14 during storage are curled due to the influence of the step 44. Occurs.

Therefore, in the portable reflection type screen according to the present invention, a plurality of curl preventing pieces 4 are provided on the back surfaces of the adhering portions of the screen film 12 and the skirt film 13.
By sticking 6, 48 with an adhesive 50 such as double-sided tape, curl due to the step 44 is prevented.

More specifically, for example, 84 mm L × 25 mm
The first curl preventing piece 46 of W × 1 mmT is attached in a direction orthogonal to the attaching portions at both ends of the attaching portion, and for example, 25 mm
A plurality of (three in FIG. 13) second curl preventing pieces 48 of L × 15 mmW × 1 mmT are adhered along the adhering portion with a predetermined space between the two first curl preventing pieces 46. There is. As the first and second curl preventing pieces 46 and 48, for example, foamed polyethylene having a foaming ratio of 15 times is used, but the material is not necessarily limited to this material. Further, the number of the second curl preventing pieces 48 is appropriately determined according to the widths of the screen film 12 and the skirt film 13.

The first and second curl preventing pieces 46, 48
By providing the ridges, new steps are generated at the upper and lower ends thereof, but the curl prevention pieces 46 and 48 are not continuous but are separated by a predetermined distance, and the skirt wound around the spring roll 14 is provided. The film 12 includes a curl prevention piece 46,
Since the screen film 12 and the skirt film 13 do not come into close contact with each other between the screen film 12 and the skirt film 13, the winding tendency is remarkably reduced.

15 and 16, in addition to the first and second curl-preventing pieces 46 and 48, two third curl-preventing pieces 5 are provided.
2 shows a modified example in which 2 is attached to the back surfaces of both ends of the screen film 12.

The third curl preventing piece 52 is, for example, 25 mmW.
A 0.2 mm T polyester adhesive film was adhered along the both ends of the screen film 12 from the hanger bar 18 to the affixing portion of the screen film 12 and the skirt film 13, and was attached to the lower end portion of the third curl preventing piece 52. The first curl prevention piece 46 is attached.

In this structure, the screen films 12 wound around the spring rolls 14 may slightly contact each other but do not come into close contact with each other, so that the winding habit can be further reduced.

FIG. 17 shows a curl prevention member 40 for the screen film 12, which includes pole grips 34a,
A mounting portion 40a having a substantially "U" shape and attached to one of the portions 34b.
And a substantially flat film contact portion 40b that contacts the screen film 12 or the skirt film 13 to prevent the film from curling. A semi-circular protrusion 40c is formed in the center of the inside of the mounting portion 40a, and when the curl prevention member 40 is attached to one of the pole grips 34a and 34b, the protrusion 40c fits into the groove of the corresponding pole of the lifting pole 16. However, the curl prevention member 40 is prevented from rotating.

When the portable reflection type screen having the above structure is used, the screen is first fixed by pulling each of the rotary legs 8 downward at a position separated by a predetermined distance in front of the projection TV or the projector and rotating them. .

Next, the lock 6 of the upper case 2b is released to open the upper case 2b. Furthermore, the lifting pole 16
Is taken out from the pole holder 36 and rotated from the storage position to the upright position to fit the locked portion 30a of the pole support 30 attached to the base end of the pole 16 into the locking portion 22d of the pole bracket 22b, Hold 16 in the upright position. After that, the second pole grip 34b
To lift the third pole 16c to a predetermined position and tighten the second pole grip 34b at that position to fix the third pole 16c to the second pole 16b. Similarly, by loosening the first pole grip 34a, raising the second pole 16b to a predetermined position, and tightening the first pole grip 34a at that position, the second pole 16b is closed.
b is fixed to the first pole 16a.

Next, the hanger bar 18 is taken out from the hanger bar receiver 19 and vertically lifted while the hanger bar 18 is held substantially horizontally, and the caps 26 attached to both ends of the hanger bar 18 are attached to corresponding bar clips 28. Fit in. At this time, the spring roll 1 is made by the coil spring disposed inside the spring roll 14.
4 is always a screen film 12 and a skirt film 1
Since 3 is urged in the direction of winding the spring roll 14, a predetermined tension is applied to the screen film 12 and the skirt film 13.

At this time, when the screen film 12 and the skirt film 13 are slightly twisted due to the twist of the up-and-down lifting pole 16, the hanger bar 18 which is rotatable within a predetermined angle range is appropriately rotated. The screen film 12 and the skirt film 13
Can be held almost upright.

When the films 12 and 13 wound around the spring roll 14 are pulled up, the films 12 and 1
The left and right edges of 3 are free and the films 12, 13
Has a tendency to curl to some extent as a whole, but a predetermined number of curl preventing members 40 are attached to the pole grips 34a and 34b, and the film contact portions 40b are attached to the films 12 and 1.
The curl of the films 12 and 13 is prevented by contacting the front surface or the back surface of the film 3. Curling prevention member 4
Further, 0 also has an effect of preventing the films 12 and 13 from shaking due to wind.

Further, as described above, since the skirt film 13 is subjected to dot-printing printing, remote control operation is possible via the skirt film 13.

After the screen is used, when the respective members are stored in the storage case 2, the procedure is reversed from the above-described procedure for assembling.

[0051]

Since the present invention is configured as described above, it has the following effects.

According to the first or second aspect of the present invention, since a plurality of curl preventing pieces which are separated by a predetermined distance are adhered to the back surfaces of the adhering portions of the screen film and the skirt film, the curl preventing pieces are An observer who observes the projected image of the screen film cannot see it, and the curl due to the step due to the sticking portion can be prevented without impairing the appearance of the entire screen.

According to the third aspect of the invention, since the curl prevention piece is made of flexible polyethylene foam, the windability of the screen film and skirt film is not impaired, and The curl prevention piece can be easily manufactured.

Further, according to the invention described in claim 4,
Since another curl preventive piece is adhered along the both ends of the screen film from the hanger bar to the sticking portion, the curl preventive effect is further improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a portable screen according to the present invention when it is stored.

2 is a cross-sectional view of the screen of FIG.

FIG. 3 is a front view of the screen of FIG. 1 in use.

FIG. 4 is a side view of the screen of FIG.

FIG. 5 is a plan view of the bracket.

FIG. 6 is a side view of the bracket.

FIG. 7 is a cross-sectional view of a hanger bar.

FIG. 8 is a front view of the lifting pole when stored.

FIG. 9 is a sectional view taken along line IX-IX in FIG.

10 is a cross-sectional view taken along the line XX in FIG.

FIG. 11 is a partial sectional view of a bar clip.

FIG. 12 is a side view of the pole holder.

FIG. 13 is a partial rear view of the screen film and the skirt film, and particularly shows a curl prevention piece provided in the attachment portion thereof.

14 is a cross-sectional view taken along the line XIV-XIV in FIG.

FIG. 15 is a partial rear view of a screen film and a skirt film showing a modified example of the curl prevention piece.

16 is a cross-sectional view taken along the line XVI-XVI in FIG.

FIG. 17 is a perspective view of a curl prevention member.

[Explanation of symbols]

 2 Storage case 2a Lower case 2b Upper case 8 Rotating leg 12 Screen film 13 Skirt film 14 Spring roll 16 Elevating pole 18 Hanger bar 29 Spring pin 28 Bar clip 34 Pole grip 38 Partition wall 40 Curling prevention member 44 Step difference 46 First roll habit Prevention piece 48 Second curl prevention piece 52 Third curl prevention piece

Claims (4)

[Claims] 1. A storage case, a roll rotatably attached to the storage case, around which a screen film is wound, urged by a spring, and a hanger bar to which one end of the screen film is attached. , Two sets of expandable / contractible members having a holding means for pivotally pivoting between a storage position and an upright position substantially perpendicular to the storage position, the base ends being pivotally mounted near both ends of the storage case and holding the hanger bar in the upright position. In a portable reflection type screen, the other end of the screen film is attached to one end of the skirt film, the other end of the skirt film is attached to the roll, and the screen film and the skirt film By sticking a plurality of curl prevention pieces on the back surface of the sticking part of the sticker, a curl due to a step due to the sticking part is prevented. Portable reflective screen, characterized in that. 2. A first curl prevention piece having two first curl prevention pieces adhered with the curl prevention piece at both ends of the sticking section in a direction orthogonal to the sticking section, and a predetermined gap between the first curl prevention piece. The portable reflection-type screen according to claim 1, wherein the portable reflection-type screen comprises a plurality of second curl preventing pieces that are adhered along the adhering portion at intervals. 3. The portable reflective screen according to claim 2, wherein the first and second curl preventing pieces are made of expanded polyethylene. 4. The third curl preventing piece is adhered along the both ends of the screen film from the hanger bar to the sticking portion, and the first curl preventing piece is attached to the lower end of the third curl preventing piece. The portable reflective screen according to claim 2, which is attached to the screen.