JP2009168881A - screen - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a screen which is collapsible and allows easily observing of a projected image. <P>SOLUTION: This screen 1 includes a screen cloth part 2, and a screen frame part 3 provided along the outer edge of the screen cloth part 2 to hold the flatness of the screen cloth part 2 and support the part, wherein the screen frame part 3 includes a plurality of frame members disposed at spacings of a predetermined length and a connecting frame connecting the plurality of frame members and adapted to spread out the screen cloth part 2 in a plane holding the flatness. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a screen having a foldable configuration.

  Conventionally, screens on which images are projected from a projector or the like are known that can be folded in order to improve portability. This screen has a configuration in which a plurality of screen pieces are connected by a hinge tape or a highly stretchable elastic tape, and can be formed as a large-area screen by developing the plurality of screen pieces. When a large-area screen is folded, first, adjacent screen pieces are folded in order. At this time, the screen pieces that are adjacent and directly folded are connected by a hinge tape, and even if they are adjacent to each other, the screen pieces that are folded while holding another screen piece are connected by an elastic tape. That is, the screen pieces connected by the stretchable tape can be sandwiched between the stretchable tapes by extending the stretchable tape.

  In this way, a screen in which a plurality of screen pieces are connected by hinge tape or stretchable tape forms a large area screen when unfolded, and when folded, becomes a single screen piece that can be carried with a projector or the like. Excellent portability (for example, Patent Document 1).

JP 2005-106963 A

  However, in the conventional technique, since the screen is configured by connecting the screen pieces, there is a problem that there is a break at the boundary portion of the screen pieces, and it may be difficult to visually recognize the projected image.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following application examples or forms.

  [Application Example 1] A screen according to this application example is provided along a screen portion on which an image is projected from a projection device, and along an outer edge of the screen portion, for maintaining and supporting the flatness of the screen portion. A screen frame portion, wherein the screen frame portion connects a plurality of frame members arranged with a predetermined length and the plurality of frame members, and the screen portion is flat. And a connecting frame that develops on a plane in which the two are held.

  According to this screen, at the time of image projection, the screen portion is supported by the plurality of frame members arranged with a predetermined length and the connecting frame that connects the plurality of frame members. Therefore, it is possible to form a surface having no flatness and having flatness. The screen portion having such flatness can provide a clear and easy-to-view image without distortion when the image is projected. At the end of the projection, if the connection of the connecting frame is released, the screen part can be folded together with the screen frame part, and the screen becomes a small size that can be easily carried and can be accommodated in a handbag or the like. It has high mobility that can be carried freely.

  Application Example 2 In the screen according to the application example described above, the connection frame is slidably received in a hollow portion provided in the frame member, and is fixed by a fixing member at a position where the screen frame portion is divided or connected. It is preferable.

  According to this configuration, the connecting frame is configured to slide the hollow portion provided in the frame member, and is pulled out from the hollow portion and connected to the adjacent frame member to restrict bending, and the flatness of the screen Is held, and the screen frame portion is allowed to be bent when the connection is released and the hollow portion is accommodated. Since the connecting frame is fixed with a fixing member at each position of division or connection, there is no risk of jumping out of the hollow portion and losing at the division position, and the outer edge of the screen portion is supported by the screen frame portion at the connection position. Can be made stronger.

  Application Example 3 In the screen according to the application example, the screen portion may be folded between the plurality of frame members, and the shape of the folded portion may be a substantially arc shape formed with the predetermined length. preferable.

  According to this structure, the folding part which is a location where a screen part is folded has predetermined length which is the length between each frame member. In other words, even if the screen frame portion is bent 180 degrees, the folded portion is bent by forming a substantially arc of a predetermined length, and even if the screen portion is folded, the folded portion is folded into the screen portion. It is not folded in such a way that it is sticky. Therefore, when the folded screen portion is developed into a flat surface, the screen portion is reproduced with a surface having a flatness without a fold. As a result, the screen can always provide a clear and easy-to-view image by unfolding the screen portion on a flat surface. Furthermore, even if the screen includes a screen portion including glass fiber having poor bendability, it can be folded compactly.

  Application Example 4 In the screen according to the application example described above, it is preferable that the screen portion is folded so that a surface on which the image is projected is on the inside.

  According to this configuration, when the screen is folded and stored, the surface side on which the image of the screen portion is projected is folded inward, and the surface on which the image is projected is scratched during handling or storage. It is reliably protected from defects. This way of folding protects the screen from scratches and other defects even after it has been folded many times and always provides a clear and easy-to-view image when deployed on a flat surface. Is possible.

Hereinafter, specific embodiments of the screen will be described with reference to the drawings. The screen of the present embodiment is characterized in that it can be folded compactly and easily carried, and can be restored from the folded state.
(Embodiment)

  FIG. 1A is a perspective view of the screen according to the present embodiment as viewed from the front surface side on which an image is projected, and FIG. 1B is a perspective view of the screen as viewed from the back surface side. FIG. 1A shows a screen 1 in a state in which an image is projected. The screen 1 in this state includes a rectangular screen fabric portion (screen portion) 2 on which an image is projected from a projection device. And a screen frame portion 3 provided along the outer edges forming the four sides of the screen fabric portion 2 and supporting the flatness of the screen fabric portion 2. The screen 1 is installed on a wall or the like so that the long side is in the left-right direction and the short side is in the up-down direction. In this case, the screen 1 is installed with the screen frame portion 3 facing the wall or the like, and the surface of the screen fabric portion 2 located on the opposite side of the screen frame portion 3 is the surface 2a on which the image is projected. is there. That is, the projection device that projects an image onto the screen 1 is a so-called front type.

  As shown in FIG. 1B, the screen frame portion 3 that supports the screen fabric portion 2 is composed of 16 frame members, of which 8 frame members are the back surface 2 b of the screen fabric portion 2. It is affixed to the outer edge. The frame member affixed to the outer edge of the screen fabric portion 2 has an L-shape along the shape of the corner portion of the outer edge, and is disposed at each of the four corner portions of the screen fabric portion 2 and is located on the upper side. The corner frames 33 and 34 positioned on the lower side, the intermediate frame 35 disposed between the corner frames 31 and the corner frames 32, and the corner frames 33; An intermediate frame 36 disposed between the corner frame 34, an intermediate frame 37 disposed between the corner frame 31 and the corner frame 34, and between the corner frame 32 and the corner frame 33. And an arranged intermediate frame 38.

  Further, the corner frames 31, 32, 33, and 34 and the intermediate frames 35, 36, 37, and 38 are spaced apart by a predetermined length. A connecting frame 39 is disposed in these separated portions, and the connecting frame 39 is an assembly bolt (so as to connect the corner frames 31, 32, 33, 34 and the intermediate frames 35, 36, 37, 38, respectively). The fixing member 4 is fixed (FIG. 1A). The assembly bolt 4 has a hexagonal head. In addition, the separated part is provided in the position which divides the long side and the short side of the screen fabric part 2 into three almost equally. In this case, the screen fabric portion 2 is a single fabric formed of a vinyl chloride resin, and the surface 2a is mat-type embossed to diffuse and reflect light. Thereby, the screen 1 can provide an image having substantially the same brightness when viewed from any position.

  Next, the details of the screen frame portion 3 will be described. FIG. 2 is a perspective view showing a detailed configuration of the screen frame portion. Each of the screen frame portions 3 has a rectangular bar shape and has a hollow portion 30 similar to the outer shape inside. FIG. 2 shows the corner frame 31 and the intermediate frame 35 and the intermediate frame 37 connected to the corner frame 31 by the connection frame 39 in the screen frame portion 3. The outer shape of the connecting frame 39 is sized to be accommodated by sliding into the hollow portions 30 of the corner portion frame 31 and the intermediate frames 35 and 37.

  And, as shown in the intermediate frame 37, each frame member constituting the screen frame portion 3 has bolt holes 6 through which the assembly bolts 4 penetrate the intermediate frame 37 substantially parallel to the screen fabric portion 2. And the screw hole 5 which screw-engages with the thread part 4a of the assembly bolt 4 is provided. The bolt hole 6 and the screw hole 5 are provided as a pair at both ends of the intermediate frame 37, the bolt hole 6 is on the outer side of the screen 1, and the screw hole 5 is on the inner direction of the screen 1. On the side. Similarly, the bolt hole 6 and the screw hole 5 are provided at both end portions of the corner frame 32, 33, 34, the intermediate frame 35, 36, 38 and each connection frame 39.

  In FIG. 2, the corner frame 31 and the intermediate frame 35 show a state of being connected by the assembly bolt 4 via the connection frame 39, and the corner frame 31 and the intermediate frame 37 are connected to each other by the connection frame 39. The state which is accommodated in the hollow part 30 of the part frame 31 and is not connected is shown. In other words, a notch 7 is formed between the corner frame 31 and the intermediate frame 37, which is a part that is separated as if both are notched. As a result of the cutout 7, the corner frame 31 and the intermediate frame 37 can be folded at the cutout 7, and the screen fabric portion 2 can be folded. If the connecting frame 39 accommodated in the hollow portion 30 of the corner frame 31 is fixed to the corner frame 31 by the assembly bolt 4, the screen fabric portion 2 does not fall out of the hollow portion 30 of the corner frame 31. Can be folded smoothly.

  In this way, if the connecting frame 39 is accommodated in the corner frame 31, the screen cloth portion 2 can be folded by allowing the corner frame 31 and the intermediate frame 37 to be folded at the cutout portion 7. If the corner frame 31 and the intermediate frame 37 are connected by the frame 39, the bending of the corner frame 31 and the intermediate frame 37 can be restricted, and the screen cloth portion 2 can be developed in a plane. The corner frames 32, 33, and 34 function in the same manner as the corner frame 31.

  Next, a procedure for folding the screen 1 shown in FIG. 1 in a state where an image is projected will be described. FIG. 3A is a perspective view showing a screen in which a notch is formed, and FIG. 3B is a perspective view showing a state in which the long side direction of the screen is folded. FIG. 3C is a perspective view showing an initial procedure for folding the short side direction of the screen, and FIG. 3D is a perspective view showing a state where the short side direction of the screen is folded. In FIG. 3, in order to make the positional relationship between the folded screen fabric portion 2 and the screen frame portion 3 easier to understand, they are drawn slightly apart from each other without being in close contact with each other. Further, the assembly bolt 4, the screw hole 5, and the bolt hole 6 are appropriately omitted.

  First, as shown in FIG. 3A, eight connecting frames 39 (FIG. 1B) are accommodated in the hollow portions 30 (FIG. 2) of the corner frames 31, 32, 33, and 34. That is, the connecting frame 39 for connecting the corner frame 31 and the intermediate frame 37 shown in FIG. 2 is removed by the assembly bolt 4 that fixes both ends of the connecting frame 39 to the corner frame 31 or the intermediate frame 37. Then, it slides into the hollow portion 30 of the corner frame 31 and is accommodated. Similarly, the other seven connecting frames 39 are accommodated in any one of the corner frames 31, 32, 33, and 34, respectively. As a result, between the corner frames 31, 32, 33, 34 and the intermediate frames 35, 36, 37, 38, eight cutout portions 7 are substituted for the connection frame 39. The cutout portion 7 is formed at two locations so as to divide the long side and the short side of the screen fabric portion 2 into three substantially, and the screen fabric portion 2 is provided at the long sides or the short sides facing each other. It can be folded along a line connecting the notches 7. These lines include a fold line 21 and a fold line 22 that connect the notch portions 7 provided on the opposite short sides, and a fold line 23 and a fold line 24 that connect the notch portions 7 provided on the opposite long sides, respectively. .

  And after changing to the connection frame 39 and forming the notch part 7, the screen 1 is folded in order along the folding line 23 and the folding line 24. FIG. Specifically, as shown in FIG. 3B, first, the notch 7 between the corner frame 32 and the intermediate frame 35 is bent, and at the same time, the notch between the corner frame 33 and the intermediate frame 36 is folded. The screen fabric part 2 is folded along the fold line 23 by folding the part 7. At this time, the screen fabric portion 2 is folded so that the surfaces 2a face each other and overlap each other. If the screen fabric portion 2 is folded in this way, the back surface 2b of the screen fabric portion 2 is touched during the folding operation, and there is almost no risk of scratching the front surface 2a.

  Further, the folded portion 8 in which the screen fabric portion 2 is folded along the fold line 23 includes notches 7 between the corner frame 32 and the intermediate frame 35 and between the corner frame 33 and the intermediate frame 36. Can have a substantially arc shape formed with a predetermined length. In this way, if the bent portion 8 is not restricted by the corner frames 32 and 33 and the intermediate frames 35 and 36 but has a substantially arc shape, the surface 2 a of the screen fabric portion 2 faces the folded portion 8. It is possible to avoid a close crease and a crease along the fold line 23.

  When the screen fabric portion 2 is folded along the fold line 24 (FIG. 3A), the screen fabric portion 2 is provided between the corner frame 31 and the intermediate frame 35 and between the corner frame 34 and the intermediate frame. Since the notch portions 7 between each of them have a predetermined length, they can be folded with the surface 2a on the inside while drawing a substantially arc shape with the corner frames 32, 33 and the like interposed therebetween. By these two foldings, the surface 2a of the screen fabric portion 2 is all folded inward, and thereafter protected from scratches and the like due to external factors. This completes the folding of the screen 1 in the long side direction, and the size of the screen 1 is １ ／ at this point.

  Next, folding of the screen 1 in the short side direction will be described with reference to FIGS. 3 (c) and 3 (d). In the folding in the short side direction, first, as shown in FIG. 3C, the screen cloth portion 2 is bent along the fold line 21 in a direction in which the corner frame 31 faces the intermediate frame 37. The corner frame 31 and the intermediate frame 37 are folded in close contact with each other. At this time, the fold portion 8 in the fold line 21 has a predetermined length of the cutout portion 7 formed between the corner frame 31 and the intermediate frame 37 and has a substantially arc shape. Moreover, in the folding part 8 in the fold line 21, the screen cloth part 2 is folded in triplicate, and even when an external force for further folding the folding part 8 is applied, the substantially arcuate shape can be maintained. It is possible to avoid a situation in which the arc-shaped portion is crushed and the screen cloth portion 2 is creased.

  After the folding along the fold line 21 is completed, the screen fabric portion 2 is bent along the fold line 22 as shown in FIG. The direction in which the screen fabric portion 2 is bent is performed so that the intermediate frame 36 is on the inner side of the bending. At this time, the fold portion 8 in the fold line 22 has a predetermined length of the cutout portion 7 formed between the corner frame 34 and the intermediate frame 37 and is substantially the same as the fold portion 8 in the fold line 21. It has a substantially arc shape. Therefore, even in the fold portion 8 in the fold line 22, the substantially arc-shaped portion is crushed by the external force, and the screen fabric portion 2 is hardly creased.

  As described above, the screen 1 in which the screen fabric portion 2 is folded along the fold lines 21, 22, 23, and 24 has a flat surface as compared with the case where the screen 1 is expanded to the maximum plane shown in FIG. The size is about 1/9. In the folded screen fabric portion 2, corner frames 31, 32, 33, 34 and intermediate frames 35, 36, 37, 38 are located on the outer periphery of the screen fabric portion 2. Therefore, even if an external force or the like that further bends the screen 1 acts, the screen 1 has a strength that resists it and can maintain the folded state stably.

  As described above, the screen 1 folded in the order shown in FIGS. 3A to 3D is not only folded to reduce the size of the plane, but also creases the screen fabric portion 2. The folding thickness is also reduced without any problems. FIG. 4 is a perspective view showing a screen that has been folded. As shown in FIG. 4, the screen 1 is folded into a substantially rectangular parallelepiped shape with the height direction folded to a thickness when the reduced flat surface is the bottom surface. With this shape, for example, the screen 1 can be accommodated in the portable bag 10 and can be easily carried.

  In this case, as described above, the corner frames 31, 32, 33, 34 and the intermediate frames 35, 36, 37, 38 are located on the outer periphery of the folded screen 1, so that Even if 10 is carried and the posture of the accommodated screen 1 is changed, the folded state of the screen 1 is hardly collapsed and maintains the form at the time when it is accommodated. As a result, the screen 1 on which a clear image can be obtained when deployed on a plane can be freely carried along with the projection device, and a clear image can be obtained even in a place without a screen facility.

  Hereinafter, main effects of the embodiment will be described together.

  In the screen 1, the screen cloth portion 2 is developed on a plane by the screen frame portion 3 in which the frame members 31-38 are connected by the connecting frame 39, while the connection of the connecting frame 39 is released and the cutout portion 7 is bent. The screen fabric portion 2 can be folded. In this way, the screen 1 allows or restricts the connection of the frame members 31-38, develops the screen fabric portion 2 on a flat surface and enables projection of an image, and folds the screen fabric portion 2 to carry it. And can be done easily.

  The folded portion 8 of the folded screen fabric portion 2 is folded by forming a substantially arc having a predetermined length of the cutout portion 7, and is not folded in a state where the screen portion is creased. Accordingly, when the folded screen fabric portion 2 is developed into a flat surface, the screen fabric portion 2 is reproduced as a plane having flatness without a fold or the like. Thereby, the screen 1 can provide an image that is easy to view without distortion due to a crease or the like.

  When the screen 1 is folded, the screen fabric portion 2 is folded with the surface 2a on which the image is projected inside. Thereby, during handling and storage of the screen 1, it is possible to surely protect the surface 2a of the screen fabric portion 2 from defects such as scratches.

  Further, the screen 1 is not limited to the above embodiment, and the same effects as those of the embodiment can be obtained even if the screen 1 is in the form of the following modification.

  The screen fabric portion 2 of the screen 1 is not limited to being made of vinyl chloride, but may be made of cloth, paper, or the like, and has a configuration in which glass fiber reinforced or lenticular lenses are arranged. Etc. Thereby, the screen 1 can use various kinds of materials for the screen dough part 2, and a wide assortment according to the application is possible.

  The assembly bolt 4 for attaching the connecting frame 39 to the frame members 31-38 is not limited to a hexagonal bolt on the head, and may have a thumbscrew that can be tightened without a tool. . Furthermore, the screw hole 5 of the screen frame part 3 into which the screw part 4a is screwed may be a through hole without a screw groove, and in this case, the screw hole 4a has a nut screwed into the screw part 4a.

  Moreover, although the connection frame 39 is a structure which slides to the hollow part 30 of the frame members 31-38, the structure which has the mechanism in which the connection frame 39 fixed as the screen frame part 3 can be bent may be sufficient. . The screen frame portion 3 can be allowed to be bent and restricted without using the assembly bolt 4, and the operation becomes easier.

  The screen frame portion 3 has a square shape in cross section, but may have a shape other than the square, such as a square shape or an arc shape. An optimal shape can be selected according to the size and application of the screen 1.

  The folding of the screen 1 is not limited to folding with the surface 2a inside along the folding lines 21, 22, 23, 24 in the order shown in FIG. 3 (a) to FIG. 3 (d). You may fold in order or without making the surface 2a inside. Even if it is folded in this way, it can be accommodated in the bag 10 and carried as shown in FIG. Moreover, although the screen fabric part 2 is divided into nine parts and folded, it may be divided into four parts, six parts, or the like.

  Further, the screw hole 5 and the bolt hole 6 of the screen frame portion 3 may be long holes, so that the fixing position of the connecting frame 39 can be adjusted. According to this structure, the length of the notch part 7 in which the connection frame 39 is provided can be finely adjusted, and the tension of the screen fabric part 2 can be adjusted. In this case, the screw portion 4a of the assembly bolt 4 is configured to be screwed with the nut.

  Further, the foldable screen 1 is for a front type projection device, but is not limited to this application, and may be a transmissive screen corresponding to a rear type projection device.

(A) The perspective view which looked at the screen concerning this embodiment from the surface side by which an image | video is projected, (b) The perspective view which looked at the screen from the back surface side. The perspective view which shows the detailed structure of a screen frame part. (A) The perspective view which shows the screen in which the notch was formed, (b) The perspective view which shows the state which folded the long side direction of the screen, (c) The perspective view which shows the first procedure which folds the short side direction of a screen (D) The perspective view which shows the state which folded the short side direction of the screen. The perspective view which shows the screen which folding was completed.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Screen, 2 ... Screen dough part, 3 ... Screen frame part, 4 ... Assembly bolt, 4a ... Screw part, 5 ... Screw hole, 6 ... Bolt hole, 7 ... Notch part, 8 ... Folded part, 21 and 22 , 23, 24 ... folding line, 30 ... hollow part, 31, 32, 33, 34 ... corner part frame, 35, 36, 37, 38 ... intermediate frame, 39 ... connecting frame.

Claims (4)

A screen portion on which an image is projected from the projection device;
A screen frame portion provided along an outer edge of the screen portion, for maintaining and supporting the flatness of the screen portion, and a screen comprising:
The screen frame portion includes a plurality of frame members arranged with a predetermined length, and
And a connecting frame that connects the plurality of frame members and develops the screen portion in a flat plane. The screen of claim 1,
The connecting frame is slidably received in a hollow portion provided in the frame member, and is fixed by a fixing member at a position where the screen frame portion is divided or connected. The screen according to claim 1 or 2,
The screen is folded between the plurality of frame members, and the shape of the folded portion is a substantially arc shape formed with the predetermined length. The screen according to any one of claims 1 to 3,
The screen is folded so that a surface on which the image is projected is inward.

Images