JP2005110098A - Screen angle control apparatus for planar display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To control the forward and backward angles and right and left angles of a planar display while installing the display on the floor. <P>SOLUTION: An annular gear 8 is fixed on a base 2. A rotary part 14 is disposed concentrically with the annular gear 8 so as to be freely rotated. The rotary part 14 comprises a driving part 16 for rotating the rotary part. A rotary shaft 18 is disposed in the rotary part 14. A roller 20 is provided in the outer end of the rotary shaft 18. A driving part 24 for rotating the rotary shaft is also provided in the rotary part 14. An arcuate part 22 in contact with the roller 18 is provided outside the rotary part 14. The arcuate part 22 is slid according to the rotation of the roller 18. A turning part 28 is provided successively to the arcuate part 22. The turning part 28 has a guide member 36. The turning part 28 is coupled to the back of a planar display 32. A fixed part 34 is provided in the rotary part 14. The fixed part 34 has an arcuate guide groove 38 which extends above the rotary part 14 and through which the guide member 36 is inserted. The arcuate part 22 and the guide groove 38 have concentric circular arcs around the tilt rotary center of the planar display 32. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an apparatus for adjusting a screen angle of a flat display such as a liquid crystal television or a PDP.

  Since the flat display is thin, it can be attached to the wall surface like a frame. In this case, it is desirable to arbitrarily adjust the screen angle in the front-rear direction (tilt direction) and the left-right direction (azimuth direction) after attachment. As an apparatus capable of such adjustment, for example, there is a technique disclosed in Patent Document 1.

  In this technology, the center of the back of the flat panel display is supported on the wall by a universal joint so that it can be swung back and forth and left and right. A pressing tool that presses the back surface of the flat panel display is provided at each position shifted. This pressing tool is driven by a motor.

JP 2002-77775 A

  The above technique is based on the assumption that a flat display is attached to a wall surface. However, in recent years, it has also been proposed to arrange a flat display on the floor. In this case, it is impossible to apply the above technique.

  An object of the present invention is to provide an angle adjusting device capable of adjusting the angle of a screen in the front-rear and left-right directions even in a flat panel display placed on the floor.

  The angle adjustment device of one embodiment of the present invention has a flat base. The base can be of various shapes, whether rectangular or circular. An annular gear is fixed on the base. This annular gear has a plurality of teeth along its inner peripheral surface. A rotating part is rotatably arranged above the base part concentrically with the annular gear. The rotating unit is provided with a first motor. Furthermore, the rotation part is also provided with a rotation transmission part. This rotation transmission part transmits the rotational force of a 1st motor to the tooth | gear of an annular gear, and rotates the said rotation part. As this rotation transmission part, the gear which meshes with a 1st motor and an annular gear can be used, for example. At least one gear may be provided, but a plurality of gears having different numbers of teeth may be used when appropriately adjusting the rotational force transmitted to the annular gear. A rotating shaft is arranged in the rotating part in parallel with the base part. The rotating shaft is disposed so as to be rotatable around its central axis, and at least one end portion projects outward from the rotating portion. It is also possible for both ends to protrude outward from the rotating part. A rotating body is provided at the outer end of the rotating shaft. This rotating body can also be provided at both outer ends of the rotating shaft. The rotating part is also provided with a second motor for rotating the rotating shaft around its central axis. A rotation transmission unit may be provided between the second motor and the rotation shaft. An arcuate portion that contacts the rotating body is provided outside the rotating portion. This arc-shaped portion can also be provided for each rotating body. The arcuate portion slides according to the rotation of the rotating body. A swivel portion is provided continuously to the arcuate portion. The swivel portion has a guide member that extends to above the rotating portion and protrudes to the side. Two swivel portions can also be provided corresponding to each arc-shaped portion, and these can be integrated. The swivel unit is coupled to the back surface of the flat display. The rotating part is provided with a fixed part. The fixed portion has an arcuate guide groove that extends above the rotating portion and through which the guide member is inserted. When there are two swiveling parts, two of these fixing parts are also provided, and they can be formed integrally. It is desirable that the swivel part and the fixed part are arranged so as to be substantially in contact with each other. The circular hole-shaped portion and the circular hole-shaped guide groove have concentric arcs centered on the tilt rotation center of the flat panel display.

  In the angle adjusting device configured as described above, the display device is fixed to the turning unit. When the second motor is rotated in this state, the rotating shaft rotates and the rotating body is centered on the tilt rotation center of the display. The arc-shaped part having the arc is slid. At this time, since the guide is guided along the arc-shaped guide groove centered on the tilt rotation center of the display, the display rotates about the tilt rotation center. Further, when the first motor is rotated, the rotating portion is rotated by the rotational force, and the display device coupled to the rotating portion via the rotating shaft and the arc-shaped portion is also rotated.

  Therefore, when this angle adjusting device is arranged on the floor surface, the screen of the display device can be directed to any angle in the front-rear and left-right directions. In addition, in this device, the circular hole portion and the circular guide groove have concentric arcs centered on the tilt rotation center of the flat panel display, so the angle of the display device in the front-rear direction In order to adjust the angle, it is not necessary to actually provide a rotation axis at the tilt rotation center, and the display device only needs to be coupled to the swivel unit on the back surface thereof. Therefore, it is not necessary to provide a part for adjusting the angle in the display device itself, unlike the conventional one described above.

  The base portion may have a lid-like portion surrounding the rotating portion. If comprised in this way, since only the turning part and the fixing | fixed part have protruded upwards rather than the lid-shaped part, the beauty | look of an angle adjusting device improves.

  As described above, according to the present invention, it is possible to adjust the angle of the screen in the left-right and front-back directions even in a flat panel display device placed on the floor.

  The angle adjusting device of one embodiment of the present invention has a first base 2 as shown in FIG. The 1st base 2 is formed in disk shape, for example, and is arrange | positioned on a floor surface or a television stand. On the upper surface of the first base portion 2, a second base portion 4 smaller than this is provided. The second base portion 4 is also, for example, a disk shape and is arranged concentrically with the first base portion 2.

  A U-shaped groove 6 opened to the upper surface side is formed in the entire outer peripheral edge portion of the upper surface of the second base portion 4. The groove 6 is a support for an arc-shaped portion described later. An annular gear 8 is provided inside the groove 6. The annular gear 8 is provided with teeth on the inner peripheral surface of the annular body. The annular gear 8 is also formed with a groove 10 opened upward. Rollers 12 are arranged in the groove 10 at predetermined angles.

  The rotating part 14 is supported by these rollers 12. The rotating part 14 has a substantially disk shape arranged concentrically with the inner side of the annular gear 8. A drive unit 16 is provided on the rotating unit 14 as indicated by a dotted line in FIG. Although not shown, the drive unit 16 includes a motor and a rotation transmission unit that is rotated by the motor. The rotation transmission unit is composed of, for example, a plurality of gears having different numbers of teeth, and an output side gear thereof meshes with the teeth of the annular gear 8. Accordingly, the rotating unit 14 rotates as the motor rotates.

  A rotating shaft 18 is rotatably attached to the rotating portion 14, and both ends thereof protrude outward from the rotating portion 14. A rotating body, for example, a roller 20 is attached to both ends of the rotating shaft 18. These rollers 20 are in frictional contact with the inner surfaces of the two arcuate portions 22, respectively. These arc-shaped portions 22 are in contact with the U-shaped groove 6 described above. The shape of the circular hole portion 22 will be described later.

  The rotating unit 14 is provided with a driving unit 24 for driving the rotating shaft 18. The drive unit 24 includes a motor and a rotation transmission mechanism. This rotation transmission mechanism is also composed of a plurality of gears having different numbers of teeth so as to transmit the rotational force of the motor. The rotation transmission mechanism is coupled to the rotation shaft 18, and the rotation shaft 18 rotates when the motor rotates. As a result, the roller 20 rotates and the arcuate portion 22 slides.

  Each of the two arc-shaped portions 22 is provided with a wing body 26, which extends toward the center of the base portion 2 and rises upward from the middle. These rising parts are the turning parts 28, and these turning parts 28 are integrally coupled at their upper ends. Note that the upper wall 14 a of the rotating unit 14 is located between the swivel units 28.

  As shown in FIG. 3, a mounting base 30 is attached between the front surfaces of the turning portion 28, and a flat display, for example, a liquid crystal display device 32 is attached to the mounting base 30.

  A fixed portion 34 is attached to the upper wall 14 a of the rotating portion 14. The fixing part 34 is formed in a frame shape surrounding the turning parts 28, 28, and has a tongue piece part 34 a that penetrates between the turning parts 28, 28 and is fixed to the upper wall 14 a at the bottom part. The side walls 34b and 34b of the fixed part 34 are provided so as to be substantially in contact with the swivel parts 28 and 28, and a guide member, for example, a roller 36 provided on the swivel parts 28 and 28 is provided on the side walls 34b and 34b of the fixed part 34. The guide grooves 38 are engaged with the provided guide grooves 38.

  As shown in FIG. 3, the guide grooves 38, 38 and the above-described arc-shaped portions 22, 22 are obtained by rotating the virtual tilt central axis 40 of the liquid crystal display device 32, that is, the liquid crystal display device 32 in the front-rear direction. When inclined, it is formed so as to be a part of a plurality of concentric circumferences centering on a position that becomes the center of rotation. The guide grooves 38 and 38 have a radius smaller than that of the arcuate portions 22 and 22. In addition, the guide grooves 38 and 38 and the arcuate portions 22 and 22 are located below the virtual tilt center axis 40.

  Note that the periphery of the base portion 2 is surrounded by a lid-like portion 42 so as to surround the periphery of the rotating portion 14. Accordingly, the fixed portion 34, the turning portion 28, and the mounting portion 30 protrude above the lid-like portion 42, and the rotating portion 14 and the drive portions 16, 24 provided therein are lid-like. It is in the part 42.

  In the angle adjusting device configured as described above, for example, when the angle of the liquid crystal display 32 in the left-right direction is changed, the rotating unit 14 is rotated by rotating the motor of the driving unit 16 and is on the rotating unit 14. The liquid crystal display 32 attached to the swivel unit 28 coupled to the fixed unit 34 via the roller 36 also rotates. During this rotation, the arc-shaped portion 22 is also moving on the U-shaped groove 6.

  When the driving unit 24 is driven in a state where the liquid crystal display 32 is at a predetermined angle in the left-right direction, the roller 20 rotates. By this rotation, the arc-shaped portion 22 rotates about the virtual tilt center 40 and the turning portion 28 rotates. At this time, the roller 36 moves along the guide groove 38 centered on the virtual tilt center 40. To do. As a result, the swivel unit 28 moves as indicated by the dotted line in FIG. 3, the liquid crystal display device 32 rotates around the virtual tilt center 40, and the angle in the front-rear direction of the liquid crystal display device 32 changes.

  Thus, the front and rear and left and right angles of the liquid crystal display device 32 can be arbitrarily changed. For example, when the angle in the front-rear direction of the liquid crystal display device 32 is changed, a rotation shaft is provided at the tilt center position in the liquid crystal display device 32, and a fixed portion that supports the rotation shaft is provided on the upper wall 14a of the rotation portion 14. It is necessary to provide a lever at an action point at a predetermined position of the display device 32, and to provide a drive unit for moving the lever back and forth on the upper wall 14a of the rotating unit 14. However, in the case of such a configuration, the height of the fixed portion becomes high, and the rotating portion becomes large because it is necessary to provide a lever and a driving portion on the rotating portion 14. On the other hand, in this angle adjusting device, the liquid crystal display device 32 is not actually provided with a rotating shaft, but uses a guide groove and a circular hole portion concentric with the rotating shaft and provided below the rotating shaft. Therefore, the height dimension of the angle adjusting device is reduced. Moreover, all the devices for adjusting the tilt are provided on the rotating unit except for the turning unit and the fixed unit, and the periphery of the rotating unit is also covered with a lid-like portion. There is no need to make it large, and the appearance is also good.

  In the above embodiment, the roller 20 and the arcuate portion 22 are frictionally coupled. However, for example, a gear may be used in place of the roller 20, and teeth that mesh with the gear may be provided in the arcuate portion. In the above embodiment, two swivel portions 28 are provided, and the corresponding fixed portion is also shaped like a frame. For example, when only one swivel portion 28 is provided, only one fixed portion is provided. Also good. In this case, only one roller 20 and arcuate portion 22 are required.

It is a vertical front view of the angle adjusting device of one Embodiment of this invention. FIG. 2 is a longitudinal plan view of the angle adjustment device of FIG. 1. It is a side view of the angle adjustment apparatus of FIG. It is a figure which shows the relationship between the circular arc-shaped part of the angle adjustment apparatus of FIG. 1, and a guide groove.

Explanation of symbols

2 Base 14 Rotating part 28 Turning part 34 Fixed part

Claims (2)

A flat base, and
An annular gear fixed to the base strip and having teeth along the inner circumferential surface;
A rotating portion disposed concentrically with the annular gear and rotatably above the base portion;
A first motor provided in the rotating unit;
A rotation transmitting portion provided in the rotating portion, transmitting the rotational force of the first motor to the teeth of the annular gear, and rotating the rotating portion;
A rotating shaft disposed parallel to the base portion and having at least one end projecting outward from the rotating portion and having a rotating body at the outer end;
A second motor which is provided in the rotating part and rotates the rotating shaft around its central axis;
An arcuate portion that contacts the rotating body and slides according to the rotation of the rotating body;
A swivel portion connected to the arcuate portion, extending to above the rotating portion, having a guide member protruding laterally, and coupled to the back surface of the flat panel display;
A fixed portion provided in the rotating portion, extending above the rotating portion, and having an arc-shaped guide groove through which the guide member is inserted;
A flat panel display screen angle adjusting device, wherein the circular hole portion and the circular guide groove have concentric arcs centered on a tilt rotation center of the flat display.   2. The flat screen display screen angle adjusting device according to claim 1, wherein the base has a lid-like portion surrounding the rotating portion.

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