JP2006317697A - Screen device and screen system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a screen device and a screen system capable of securing planarity of a screen that forms an image projection plane at all times with easy handling and portability. <P>SOLUTION: The screen device and its system comprise a generally rectangular screen forming an image projection plane, a storage where the screen is rolled up in the predetermined direction and stored, a first frame which links and supports points adjacent to the diagonally opposing vertexes of the screen in a freely retractable manner, and a second frame which links and supports points adjacent to the diagonally opposing vertexes of the screen different from the vertexes of the first frame, in a freely retractable manner. The first and second frames are arranged so that they freely rotate about their gravity centers on a plane in parallel with the screen when the screen is spread or stored. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a screen device and a screen system that form a projection surface of an image output from a projection device such as a projector.

  In recent years, coupled with the miniaturization of projectors such as projectors, there is an increasing demand for screens that are easy to carry and easy to handle. As such a portable screen, a screen wound around a spring roll is stored in a predetermined storage case, an arm assembled by a pantograph system is supported by a spring, and the screen is made using the elastic force of this spring. A technique for lifting and extending is disclosed (for example, see Patent Document 1).

JP 2000-131766 A

  However, in the case of the above-described prior art, the arm that connects the top bar connected to the upper end of the screen and the lower casing that winds and stores the screen is connected only to the center of the top bar. Therefore, when the screen is extended or stored, the movements near the both ends of the top bar are not completely restrained, and the flatness of the screen cannot always be ensured.

  The present invention has been made in view of the above, and provides a screen device and a screen system that can always ensure flatness of a screen that forms an image projection surface, is easy to handle, and is suitable for transportation. For the purpose.

  In order to solve the above-described problems and achieve the object, a screen device according to a first aspect of the present invention includes a substantially rectangular screen that forms an image projection surface, and a storage unit that winds and stores the screen. A first frame portion that connects and supports elastically the vicinity of the vertices facing the diagonal direction of the screen, and the vicinity of the first frame portion that is near the vertices facing the diagonal direction of the screen. And a second frame part for connecting and supporting the vicinity of different vertices in a telescopic manner, and the first and second frame parts are arranged on a plane parallel to the screen when the screen is extended or stored. The center of gravity is pivotally attached to each other so as to be rotatable with respect to each other.

  According to a second aspect of the present invention, in the first aspect of the present invention, the first frame portion includes a first arm through which the center of gravity of the first frame portion passes, and one end portion of the first frame portion A first elastic member fixed to the end of the arm and having the other end pivotably mounted in the vicinity of one apex of the screen; and one end is the end of the first arm. The first elastic member is fixed to an end different from the end to which the first elastic member is fixed, the other end is the apex of the screen and the vicinity of the position where the end of the first elastic member is attached A second elastic member that is pivotably mounted in the vicinity of the vertex opposite to the vertex in the diagonal direction, and the second frame portion passes through the center of gravity of the second frame portion. A second arm pivotally attached to the first arm and one end of the second arm A third elastic member fixed to the end of the arm and having the other end pivotably attached in the vicinity of one apex of the screen, and one end being the end of the second arm The third elastic member is fixed to an end different from the end to which the third elastic member is fixed, and the other end is the apex of the screen and the end of the third elastic member is attached. And a fourth elastic member rotatably attached in the vicinity of the apex in the diagonal direction opposite to the apex in the vicinity.

  According to a third aspect of the present invention, in the second aspect of the present invention, the first to fourth elastic members are gas springs or coil springs.

  A screen system according to a fourth aspect of the present invention includes the screen device according to any one of the first to third aspects, and a pedestal device to which the screen device can be attached.

  According to a fifth aspect of the present invention, in the invention according to the fourth aspect, the pedestal device moves the screen device mounted on the pedestal device up and down in the vertical direction or about a predetermined vertical axis. It has a position adjusting means for adjusting the position of the screen device by rotating the screen device.

  According to a sixth aspect of the invention, in the fourth aspect of the invention, either one of the screen device and the pedestal device has an audio output means.

  According to a seventh aspect of the invention, in the sixth aspect of the invention, the audio output means is provided in the first and second frame portions.

  According to the present invention, a substantially rectangular screen that forms an image projection plane, a storage unit that winds and stores the screen in a predetermined direction, and the apexes near the apex that are opposite to each other in the diagonal direction of the screen expand and contract. A first frame portion that is freely connected and supported, and a second portion that is adjacent to each other in the vicinity of the vertexes opposite to each other in the diagonal direction of the screen and that is adjacent to a vertex that is different from the first frame portion. And the first and second frame portions are pivotally attached to each other so that the first and second frame portions can rotate with respect to each other on a plane parallel to the screen when the screen is expanded or stored. Therefore, it is possible to always ensure the flatness of the screen forming the projection surface of the image, and it is easy to handle and suitable for transportation. It is possible to provide a.

  The best mode for carrying out the present invention (hereinafter referred to as an embodiment) will be described below with reference to the accompanying drawings.

(Embodiment 1)
FIG. 1 is a diagram showing the configuration of the back surface (the surface on the back side of the projection surface) of the screen device according to Embodiment 1 of the present invention. FIG. 2 is a side view in the direction of arrow A in FIG. The screen device 1 shown in these drawings includes a rectangular screen 2 forming an image projection surface, a top bar 3 connected to the upper end of the screen 2, and the lower end of the screen 2 by the action of elastic force. A spring roll 4 wound from the part and a storage part 5 for storing the spring roll 4 are provided.

  The screen 2 is a commonly used screen, and includes a base layer made of glass or PET (polyethylene terephthalate), a reflective layer bonded to the surface of the base layer, and a bead layer formed on the surface of the reflective layer. Or a polarizing layer and the resin layer which coat | covers the surface of this bead layer or a polarizing layer are provided.

  The top bar 3 and the storage part 5 are connected and supported by two frame parts 6 and 7. That is, the frame portions 6 and 7 connect one end portion of the top bar 3 and one end portion of the storage portion 5, respectively, and are rotatable with respect to each other on a plane parallel to the screen 2 at the center of gravity of each frame portion. The top bar 3 moves up and down with respect to the spring roll 4 to assist in expanding or storing the screen 2 and ensuring the flatness of the screen 2.

  A detailed configuration of the frame portions 6 and 7 will be described. The frame portion 6 includes a hollow arm 61 and gas springs 62 and 63 that are respectively engaged with both ends of the arm 61 and urge the arm 61 in one diagonal direction of the screen 2. Similarly to the frame portion 6, the frame portion 7 is also locked to both ends of the hollow arm 71 and the opposite ends of the arm 71 in a diagonal direction different from the direction in which the arm 61 is biased in the diagonal direction of the screen 2. Gas springs 72 and 73 for urging the arm 71. These two arms 61 and 71 are pivotally supported by a support shaft 8 so as to be rotatable with respect to each other on a plane parallel to the screen 2 at their center of gravity. As such arms 61 and 71, it is more preferable to use aluminum hollow pipes that are lightweight and have high strength.

  The gas spring 62 includes a cylinder 62a hermetically sealed with oil and compressed gas (nitrogen gas), a piston rod 62b that protrudes from one end of the cylinder and can be expanded and contracted with respect to the cylinder 62a, and the other end of the cylinder 62a. A mounting portion 62c provided with a hole for mounting another member to the gas spring 62, and a mounting portion 62d that is substantially the same shape as the mounting portion 62c and is provided at the protruding end of the piston rod 62b; Is provided. The gas spring 62 uses, as an elastic force, a pressure change of the compressed gas inside the cylinder 62a caused by a volume change inside the cylinder 62a accompanying expansion and contraction of the piston rod 62b.

  Since the gas spring 62 having the above configuration has a relatively low elastic constant as compared with other elastic members, it can generate a certain elastic force even for a long stroke. Further, the expansion / contraction speed of the piston rod 62b can be appropriately adjusted by the balance between the elastic force and the damping force. In the first embodiment, a gas spring that can be used regardless of the mounting posture is applied.

  The other gas springs 63, 72, and 73 have the same configuration as the gas spring 62 described above. For this reason, as in the case of the gas spring 62, the constituent parts of the gas springs are given the reference numerals with alphabets (a to d) added to the end of the reference numerals of the gas springs. That is, at the end of the sign of each gas spring, a for a cylinder, b for a piston rod, c for a cylinder mounting part, and c for a piston rod mounting part. Are each marked with d. The elastic coefficients of these gas springs 62, 63, 72, and 73 are all the same.

  In the frame portion 6, the mounting portion 62c of the gas spring 62 is fixed to one end portion of the arm 61, and the longitudinal direction of the arm 61 and the longitudinal direction of the cylinder 62a are always in a straight line. The attachment portion 62d is attached to the end portion of the top bar 3 so as to be rotatable. On the other hand, the attachment portion 63c of the gas spring 63 is fixed to an end portion of the arm 61 which is different from the end portion to which the attachment portion 62c is fixed, and the attachment portion 63d is an end portion of the storage portion 5. Thus, it is rotatably attached to an end portion diagonally facing the end portion of the top bar 3 to which the attaching portion 62d is attached. As a result, the central axis of the frame portion 6 always points in the diagonal direction of the screen 2 regardless of the rising position of the top bar 3.

  The frame unit 7 has the same configuration as the frame unit 6 described here. Therefore, the frame parts 6 and 7 correspond to either the first or second frame part, respectively. When the frame portion 6 is the first frame portion, the arm 61 is a first arm, and the gas springs 62 and 63 are first and second elastic members, respectively. In this case, the frame portion 7 is the second frame portion, the arm 71 is the second arm, and the gas springs 72 and 73 are the third and fourth elastic members, respectively.

  FIG. 3 is a view showing a state in which the screen 2 is stored in the storage unit 5 when the screen device 1 is not used, and is a view seen from the same direction as FIG. 1 (the back side of the screen 2). In the state shown in FIG. 3, the gas spring 62 is most compressed and almost the entire piston rod 62 b is accommodated in the cylinder 62 a, so that the total length of the gas spring 62 is minimized (the other gas springs 63. , 72, and 73 are the same).

  If a means for fixing the positional relationship between the top bar 3 and the storage portion 5 is provided in the state in which the screen 2 is stored in this way, the screen device 1 can be easily stored and transported in the state shown in FIG. Can do. For example, a hook-shaped hook is provided at an appropriate position of the top bar 3, while a hooking member capable of hooking the hook is provided at an appropriate position in the storage portion 5, so that the screen 2 is stored in the hook. It may be configured to be held by a latching member. Further, a cover member capable of covering the screen 2, the top bar 3, and the frame portions 6 and 7 with the storage portion 5 is provided in a state where the screen 2 is stored, and a handle is formed at an appropriate position of the cover member. If so, it is more suitable when the screen device 1 is transported.

  FIG. 4 is an explanatory view schematically showing a process of pulling up the top bar 3 and expanding the screen 2 from the state shown in FIG. State (I) is the same as FIG. 3, and shows a state in which the screen 2 is wound to the maximum extent by the spring roll 4 and stored. In this state (I), when a vertical upward force larger than the vertical downward elastic force that the screen 2 receives from the spring roll 4 is applied to the top bar 3, the top bar 3 starts to rise.

  At this time, when viewed in a system that rises together with the support shaft 8, the arm 61 rotates clockwise about the support shaft 8, while the arm 71 rotates counterclockwise about the support shaft 8. Furthermore, when viewed in the same system, the piston rods 62b, 63b, 72b, and 73b each extend in a direction away from the support shaft 8. State (II) shows an intermediate state while the screen 2 is rising. It is also possible to stop the top bar 3 from rising by applying an appropriate downward force from the outside in the intermediate state (II).

  The state (III) shows a state in which the top bar 3 is raised most with respect to the storage portion 5 and the screen 2 is extended to the maximum, and corresponds to the state shown in FIG. Note that by adjusting the pressure of the gas springs 62, 63, 72, and 73, or adjusting or setting the elastic force of the spring installed in the spring roll 4, for example, a predetermined upward force is applied in the state (I). When applied, it is possible to reach the state (III) at once, or it is possible to prevent the state (III) from being reached unless an upward force is always applied. In the latter case, since the user can stop the pulling up at a desired position, the stretched state of the screen 2 can be adjusted according to the place of use and the form of use.

  The operation in the case of using the screen device 1 has been described so far. However, when the screen 2 is stored, the operation in the reverse direction (state (III) → state (I)) may be performed. In this case, the rotation direction of the arms 61 and 71 with respect to the support shaft 8 is opposite to that during the expansion of the screen 2 described above, and each piston rod is compressed and stored in the corresponding cylinder. Also in this case, depending on the magnitude of the downward force applied from the outside in order to lower the screen 2, the lowering of the screen 2 may be suppressed and stopped at an appropriate position (for example, the position shown in the state (II)). it can.

  In the above description, the case where the gas springs 62, 63, 72, and 73 are applied as the first to fourth elastic members provided in the frame portions 6 and 7 has been described. As an alternative, a coil spring that can expand and contract in the same direction as each gas spring may be applied. Also in this case, the elastic coefficients of the coil springs are all the same.

  According to Embodiment 1 of the present invention described above, a substantially rectangular screen that forms an image projection surface, a storage unit that winds and stores the screen in a predetermined direction, and a diagonal direction of the screen A first frame part that connects and supports the vicinity of opposite vertices in a stretchable manner, and a vicinity of vertices that are adjacent to each other in the diagonal direction of the screen and that are different from the first frame part. A second frame portion that is freely connected and supported, and the first and second frame portions are rotatable with respect to each other on a plane parallel to the screen when the screen is expanded or stored. The center of gravity of each of the screens is attached to each other so that the flatness of the screen forming the image projection surface can always be ensured, and the screen is easy to handle and suitable for transportation. It is possible to provide a location.

  Further, according to the first embodiment, since the screen is extended by the two frame portions, the screen is hardly twisted in any state. Therefore, it is possible to prevent the surface of the screen from being damaged when the screen is expanded or stored.

(Embodiment 2)
FIG. 5 is an explanatory diagram showing the configuration of the screen system according to Embodiment 2 of the present invention. The screen system 11 shown in the figure includes a screen device 21 and a pedestal device 31 to which the screen device 21 can be detachably attached.

  The screen device 21 has the same configuration as the screen device 1 of the first embodiment. For this reason, portions having the same functions as those of the screen device 1 are denoted by the same reference numerals as those of the screen device 1. The screen device 21 is provided with a connecting portion 22 including a female screw hole penetrating the center portion of the bottom surface of the storage portion 5 in the vertical direction so as to be detachably connected to the pedestal device 31.

  In the frame portion 26 of the screen device 21, attachment portions 62 c and 63 c of gas springs 62 and 63 are fixed to both ends of the arm 23, respectively. The arm 23 incorporates a speaker which is a sound output means for outputting sound, and converts the sound signal sent from the pedestal device 31 into sound and outputs it to the outside. Similarly, a speaker is also built in the arm 24 (both ends are fixed to the attachment portions 72c and 73c of the gas springs 72 and 73, respectively) constituting the frame portion 27. The operation when the frame portions 26 and 27 extend the screen 2 is the same as the operation when the frame portions 6 and 7 extend the screen 2 in the first embodiment (see FIG. 4).

  The pedestal device 31 includes a pedestal 30 installed on the floor and a cylindrical column 33 erected from the substantial center of the pedestal 30. A cylindrical column support portion 34 having an inner diameter substantially equal to the outer diameter of the column 33 is provided at the center of the pedestal 30 so as to be rotatable with respect to the pedestal 30 by a bearing or the like. Is internally threaded over its entire length. On the other hand, a connecting portion 32 made of a male screw of a predetermined length is provided at an end portion (upper end portion in FIG. 5) of the support column 33 on the screen device 21 side. ) Is threaded on the outer periphery of the support support 34 over the entire length. When the male screw is screwed with a female screw provided on the inner peripheral surface of the support column 34, the support column 33 is connected to the base 30. Furthermore, the screen device 21 is attached to the pedestal device 31 by the connection portion 32 being screwed to the connection portion 22. The support 33 and the support 34 are respectively connected to a rotation driving means (not shown).

  FIG. 6 is a block diagram illustrating an electrical configuration of the pedestal device of the screen system according to the second embodiment. The pedestal device 31 includes a signal input unit 35 that receives an input of an audio signal from the outside, an operation unit 36 that receives an operation instruction signal for a user to perform various operations, and a position adjustment that adjusts the position of the screen device 21. Unit 37, storage unit 38 for storing and managing various information, signal output unit 39 for outputting a voice signal input via signal input unit 35 as it is or after being subjected to arbitrary signal processing or amplification, and pedestal A control unit 40 is provided for performing operation control of the device 31, processing of the audio signal, and amplification.

  The signal input unit 35 has a function of inputting an audio signal sent from the outside and sending this signal to the control unit 40.

  The signal output unit 39 sends the audio signal input via the signal input unit 35 to the outside as it is or after being signal-processed by an equalizer or the like included in the control unit 40 described later or amplified by an amplifier. Signal output function. Further, when an amplifier is built in the speaker, it has a power supply voltage output function for supplying a power supply voltage to the amplifier. In order for the signal output unit 39 to supply an audio signal and a power supply voltage or a speaker signal to the speaker, it is necessary to connect the screen device 21 and the base device 31 with an audio cable, a power cable, and a speaker cable. May pass through the hollow portion of the cylindrical column 33 described above.

  The operation unit 36 receives input of operation instruction signals for instructing various operations including power on / off, and may be realized by providing various operation buttons or the like on the surface of the pedestal device 31. For example, and a receiving unit that receives a signal transmitted from the remote control.

  Based on the operation instruction signal input from the operation unit 36, the position adjustment unit 37 moves the screen device 21 up and down or rotates the screen device 21 around a predetermined vertical axis. It has a function to do.

  The storage unit 38 is realized by using a flash memory or the like, and records various programs for controlling the operation of the pedestal device 31. Such a storage unit 38 may be realized by using an auxiliary storage device to which a storage medium such as a memory card can be attached.

  The control unit 40 is realized by using a CPU (Central Processing Unit) or the like, and reads various operation programs from the storage unit 38 based on an operation instruction signal sent from the operation unit 36, thereby controlling the operation of the pedestal device 31. And perform calculations.

  In the second embodiment, the surface of the pedestal device 31 is realized by a liquid crystal display, a plasma display, an organic EL (Electroluminescence) display, or the like. The content and operation of projection, and the volume and quality of sound output from a speaker. A display unit for displaying setting information and the like may be provided.

  The operation of the screen system 11 having the above configuration will be described. Here, it is assumed that the screen device 21 is mounted on the pedestal device 31 in advance, and the electrical connection between the speaker and the signal output unit 39 is established. In this state, the pedestal device 31 adjusts the position of the screen device 21 based on the operation instruction signal from the operation unit 36. Specifically, when the rotation support means (not shown) is driven by the operation instruction signal to rotate the support column support portion 34, the screen device 21 can be moved up and down by moving the support column 33 up and down. Further, when the support 33 is rotated by driving a rotation driving means (not shown) by the operation instruction signal, the screen device 21 can be rotated around the axis of the support 33. In addition, when the audio signal input through the signal input unit 35 is transmitted to the screen device 21 through the control unit 40 and the signal output unit 39, the screen device 21 receives the signal received through the signal output unit 39. Based on the above, the sound is output from the speakers built in the arms 23 and 24.

  According to the second embodiment of the present invention described above, a substantially rectangular screen that forms an image projection surface, a storage unit that winds and stores the screen in a predetermined direction, and a diagonal direction of the screen A first frame part that connects and supports the vicinity of opposite vertices in a stretchable manner, and a vicinity of vertices that are adjacent to each other in the diagonal direction of the screen and that are different from the first frame part. A second frame portion that is freely connected and supported, and the first and second frame portions are rotatable with respect to each other on a plane parallel to the screen when the screen is expanded or stored. By providing a screen device in which each center of gravity is pivotally attached to each other and a pedestal device to which this screen device can be mounted, the flatness of the projection surface can always be ensured, Ri handling it becomes possible to provide an easy screen system.

  Further, according to the second embodiment, the screen device can be moved up and down or rotated about a predetermined vertical axis on the side of the pedestal device on which the screen device is mounted. After the expansion, the position of the screen can be automatically adjusted by the pedestal device.

(Other embodiments)
Although the best mode for carrying out the present invention has been described in detail as the first and second embodiments, the present invention should not be limited only by these two embodiments. For example, when a projector such as a projector can be connected to the pedestal device 31 described in the second embodiment, an image of a television or the like is projected on the screen device 21 and at the same time, an audio corresponding to the image is displayed on the screen. Since it can be output from the back side of the device 21, it can be viewed with a sense of reality that sounds as if it were emitted from the image itself.

  Further, the pedestal device may be provided with functions such as a video playback device, a DVD (Digital Versatile Disk) playback device, and a hard disk playback device. Further, the pedestal device may be provided with a plurality of video media functions among the various video media so that the user can select a desired video media. By configuring such a pedestal device, it is possible to provide a screen system that can flexibly cope with a wider variety of video media.

  Thus, the present invention can include various embodiments and the like not described herein, and various design changes and the like can be made without departing from the technical idea specified by the claims. It is possible to apply.

It is a figure which shows the structure of the screen apparatus which concerns on Embodiment 1 of this invention. It is a side view of the arrow A direction of FIG. It is a figure which shows the state at the time of screen accommodation in the screen apparatus which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the process in which the screen is extended in the screen apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the structure of the screen system which concerns on Embodiment 2 of this invention. It is a block diagram which shows the electrical structure of the base apparatus of the screen system which concerns on Embodiment 2 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,21 Screen apparatus 2 Screen 3 Top bar 4 Spring roll 5 Storage part 6, 7, 26, 27 Frame part 8 Support shaft 11 Screen system 22, 32 Connection part 23, 24, 61, 71 Arm 30 Base 31 Base apparatus 33 Support column 34 Support column support unit 35 Signal input unit 36 Operation unit 37 Position adjustment unit 38 Storage unit 39 Signal output unit 40 Control unit 62, 63, 72, 73 Gas spring 62a, 63a, 72a, 73a Cylinder 62b, 63b, 72b, 73b Piston rod 62c, 62d, 63c, 63d, 72c, 72d, 73c, 73d

Claims (7)

A substantially rectangular screen that forms the projection surface of the image;
A storage section for winding and storing the screen;
A first frame portion for connecting and supporting the vicinity of apexes facing the diagonal direction of the screen in a telescopic manner;
A second frame part for connecting and supporting the vicinity of vertices opposite to each other in the diagonal direction of the screen in a telescopic manner, which are different from the first frame part;
With
The first and second frame portions are formed by pivotally mounting the centers of gravity so that the first and second frame portions are rotatable with respect to each other on a plane parallel to the screen when the screen is expanded or stored. Screen device to play. The first frame portion includes
A first arm through which the center of gravity of the first frame portion passes;
A first elastic member having one end fixed to the end of the first arm and the other end rotatably attached to one vertex of the screen;
One end is an end of the first arm and is fixed to an end different from the end to which the first elastic member is fixed, and the other end is an apex of the screen and the first A second elastic member rotatably attached to the vicinity of the apex in the diagonal direction opposite to the apex in the vicinity of the position where the end of the first elastic member is attached;
Have
The second frame part is
A second arm that passes through the center of gravity of the second frame portion and is pivotally attached to the first arm;
A third elastic member having one end fixed to the end of the second arm and the other end rotatably attached to the vicinity of one vertex of the screen;
One end is an end of the second arm and is fixed to an end different from the end to which the third elastic member is fixed, and the other end is an apex of the screen, A fourth elastic member rotatably attached in the vicinity of the apex in the diagonal direction opposite to the apex in the vicinity of the position where the end of the elastic member of 3 is attached;
The screen device according to claim 1, further comprising:   The screen device according to claim 2, wherein the first to fourth elastic members are gas springs or coil springs. A screen device according to any one of claims 1 to 3,
A pedestal device to which the screen device can be mounted;
A screen system characterized by comprising: The pedestal device is
Position adjusting means for adjusting the position of the screen device by moving the screen device mounted on the pedestal device up and down in the vertical direction or rotating the screen device about a predetermined vertical axis. 5. The screen system according to claim 4, further comprising:   The screen system according to claim 4, further comprising an audio output unit in one of the screen device and the pedestal device. The audio output means is
The screen system according to claim 6, wherein the screen system is provided on the first and second frame portions.

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