JP2005101385A - Rotary base and image display device unit having the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To smoothly rotate a rotary piece for supporting the central part of an image display device in a widthwise direction on a rotary base. <P>SOLUTION: The rotary base 1 includes the rotary piece 3 rotatably provided on a fixed base 2. The rotary piece 3 is loaded on the fixed base 2 via rollers 30 provided at the peripheral edge of the rotary piece 3. A ball bearing 23 brought into contact with the other is provided at a center of any one of the fixed base 2 and the rotary piece 3. The rotary piece 3 is covered with a cover body 10, and support rollers 12 which hold both sides of the center of the bottom of an image display device 4 to be mounted at the rotary piece 3 are provided on the ceiling surface of the cover body 10. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a turntable and an image display device unit including the turntable and an image display device, and more particularly to a turntable on which a television receiver is placed.

As a turntable on which a television receiver is mounted and which can be remotely operated by a user, the turntable shown in FIG. 8 is known (for example, see Patent Document 1).
This is provided with a rotating piece (3) on a fixed base (2), and an image display device (4) which is a television receiver is placed on the rotating piece (3). In the fixed base (2), there are provided a motor (M) for rotating the rotating piece (3) in a horizontal plane and a light receiving part (70) of a remote controller (hereinafter referred to as "remote controller") (7). The light receiving section (70) is usually a light receiving diode.
FIG. 9 is an internal block diagram of a conventional turntable (1). The light receiving section (70) is connected to the control means (6), and the motor (M) and the memory (60) are connected to the control means (6). A signal from the remote controller (7) is input to the control means (6) via the light receiving section (70), and the control means (6) rotates the motor (M) to rotate the rotating piece (3). The memory (60) stores in which direction it is rotating. By rotating the rotating piece (3) in a horizontal plane (referred to as a swivel operation), the image display device (4) can be directed to a position where the viewer can easily view it.
ACT 7-43013 (Fig. 1)

In recent years, in view of the design on the exterior, as shown in FIG. 1, there is one that supports a central portion in the width direction of an image display device (4) by a turntable (1). In such a structure, the load which the location which supports an image display apparatus (4) receives is large.
In view of this point, there is a type in which a roller (not shown) is provided on the periphery of the rotating piece (3) to smoothly rotate the rotating piece (3). However, as the size of the image display device (4) increases, the load received by the roller also increases, and it has become difficult to rotate the image display device (4) smoothly with only the roller.
An object of the present invention is to smoothly rotate a rotating piece that supports a central portion in the width direction of an image display device on a turntable.

In the rotating table in which the rotating piece (3) is rotatably provided on the fixing table (2), either the fixed table (2) or the rotating piece (3) has a ball bearing in contact with the other center. (23) is provided.
The rotating piece (3) is covered with the cover body (10), and the top surface of the cover body (10) receives both sides of the central portion of the bottom surface of the image display device (4) to be attached to the rotating piece (3). A support roller (12) is provided.

In the configuration of the present invention, the rotating piece (3) is supported for rotation by the ball bearing (23). Thereby, even if the load added to a rotation piece (3) becomes large with enlargement of an image display apparatus (4), a rotation piece (3) can rotate smoothly.
Further, on the top surface of the cover body (10), there are provided support rollers (12) and (12) for receiving both sides of the central portion of the bottom surface of the image display device (4) to be attached to the rotating piece (3). As a result, the left / right shake of the image display device (4) is suppressed, and the image display device (4) can be smoothly rotated in this respect.

Hereinafter, an example of the present invention will be described with reference to the drawings.
FIG. 1 is an exploded perspective view of an image display unit having an image display device (4) on a turntable (1) of the present invention.
The image display device (4) is specifically a plasma display, and is attached to the turntable (1) via leg pieces (5). The position where the image display device (4) faces the front is set as the center position, and the leg piece (5) swings and rotates about 30 degrees to the left and right from the center position in the horizontal plane to change the orientation of the image display device (4). . The turntable (1) is operated by a remote controller (7), and a signal from the remote controller (7) is received by the image display device (4) and transmitted to the turntable (1).
The leg piece (5) has a horizontal arm piece (52) and two support rods (50) (50) that protrude upward from both ends of the arm piece (52) and fit into the bottom of the image display device (4). ) And a fitting bar (51) that fits on the turntable (1), and the fitting bar (51) corresponds to the center in the width direction of the image display device (4). In view of the design on the appearance, the diameter of the fitting rod (51) is sufficiently smaller than the width of the image display device (4). Since the plasma display is generally large, if the image display device (4) is supported only by the fitting rod (51), there is a possibility that the left-right swing becomes large and it is difficult to rotate. In view of this point, support rollers (12) and (12) for receiving the bottom surface of the image display device (4) are provided on the top surface of the turntable (1). As a result, the left and right shake of the image display device (4) can be suppressed, and the image display device (4) can rotate smoothly.

  2 is an exploded perspective view of the turntable (1), and FIG. 3 is a cross-sectional view of FIG. 2 cut along a plane including the AA line. The rotating table (1) is provided with a rotating piece (3) rotatably on a fixing table (2). The fixing table (2) and the rotating piece (3) are a first cover body (10) and a second cover body ( 11) covered. The rotating piece (3) is prevented from coming off from the fixed base (2) by the bracket (25) attached to the fixed base (2). The rotating piece (3) is provided with a power feeding terminal (37), and the terminal (37) is connected to the image display device (4). The rotating piece (3) is energized from control means (not shown) in the image display device (4). A cylindrical body (38) is formed at the center of the top surface of the rotating piece (3), and the fitting rod (51) is tightly fitted to the cylindrical body (38). Thereby, when the rotating piece (3) rotates, the leg piece (5) and the image display device (4) rotate.

The fixed base (2) is configured by attaching a storage tray (21) on a metal bottom plate (20), and the rotating piece (3) is placed in the storage tray (21). A plurality of rollers (30) and (30) are provided on the periphery of the rotating piece (3), and a ball bearing (23) for receiving the rotating piece (3) is provided at the center of the storage tray (21). Accordingly, the rotating piece (3) can be rotated smoothly.
The first cover body (10) has a first opening (13) through which the fitting rod (51) passes, and the second cover body (11) has a second opening (14) through which the rotating piece (3) passes. ) Has been established.

FIG. 4 is an exploded perspective view of the rotating piece (3). The rotating piece (3) has an open bottom, and the bottom opening is covered with a cover lid (31). A switch board (32), a motor (M), and a gear train (34) are provided in the rotating piece (3), and an arc-shaped notch (33) is provided at the peripheral edge of the cover lid (31). ) Is provided. A part of the tooth surface of the gear (35) on the downstream side of the gear train (34) protrudes into the notch (33). The motor (M) and the gear train (34) may be provided on the cover lid (31).
FIG. 5 is a plan view of the storage tray (21). An arcuate rack (24) that meshes with the gear (35) is provided in the storage tray (21). The angle formed by the rack (24) and the rotation center of the rotating piece (3) is α. As will be described later, the storage tray (21) is provided with protrusions (22), (22a) and (22b) for operating the switch of the rotating piece (3).

FIG. 6 is a bottom view of the rotating piece (3). An angle β formed by the notch (33) of the cover lid (31) and the rotation center of the rotating piece (3) is formed larger than the angle α. As described above, since the turntable (1) rotates 30 degrees to the left and right with respect to the center position, the angle β is formed larger than the angle α by ± 30 degrees, that is, 60 degrees or more. . The protrusions (22), (22a), and (22b) are formed at the center positions, corresponding to positions that are shifted 30 degrees to the left and 30 degrees to the right from the center position. To be precise, the central part of the protrusions (22), (22a) and (22b) along the rotation direction of the rotating piece (3) corresponds to the center position, a position shifted 30 degrees to the left and 30 degrees to the right from the center position. ing. The switch substrate (32) is provided with switches (SW1) (SW2) (SW3) for detecting each position and elastically deformable contact pieces (36) covering the switches (SW1) (SW2) (SW3). ing.
FIG. 7 is a side view showing a state in which the switch (SW1) is pushed in by the protrusion (22) when the rotating piece (3) is rotated. When the contact piece (36) swings to the end of the protrusion (22), the contact piece (36) is elastically deformed and pushes the switch (SW1). The switch (SW1) sends a signal prompting the control means to stop the rotation of the motor (M) via the terminal (37). The control means cuts off the power supply to the motor (M), and the motor (M) stops rotating.

Even if the rotation of the motor (M) is stopped, the rotating piece (3) continues to rotate due to inertia. In the present application, the length L from the center portion to the end portion of the protrusion (22) along the rotation direction of the rotating piece (3) is formed to a length corresponding to this rotational inertia amount.
That is, after the rotation of the motor (M) is stopped, the rotating piece (3) stops at the center of the protrusion (22) even if the rotating piece (3) continues to rotate due to inertia. Thereby, the rotating piece (3) can be stopped at the correct position. Although the applicant considers the length L from the center portion to the end portion of the protrusion (22) to be a rotation angle of 2 degrees of the rotating piece (3), it is not limited to this value.

In this example, the rotating piece (3) is supported for rotation not only by the roller (30) but also by the ball bearing (23). Thereby, even if the load added to a rotation piece (3) becomes large with enlargement of an image display apparatus (4), a rotation piece (3) can rotate smoothly.
Further, on the top surface of the cover body (10), there are provided support rollers (12) and (12) for receiving both sides of the central portion of the bottom surface of the image display device (4) to be attached to the rotating piece (3). As a result, the left / right shake of the image display device (4) is suppressed, and the image display device (4) can be smoothly rotated in this respect.

The above description of the embodiments is for explaining the present invention, and should not be construed as limiting the invention described in the claims or reducing the scope thereof. In addition, the configuration of each part of the present invention is not limited to the above embodiment, and various modifications can be made within the technical scope described in the claims.
In the above example, the ball bearing (23) is provided on the fixed base (2), but the ball bearing (23) may be provided on the rotating piece (3).

It is a disassembled perspective view of the image display apparatus unit which provided the image display apparatus in the turntable of this invention. It is a disassembled perspective view of a turntable. It is sectional drawing which fractured | ruptured FIG. 2 in the surface containing an AA line. It is a disassembled perspective view of a rotary piece. It is a top view of a storage tray. It is a bottom view of a rotating piece. It is a side view which shows the state in which a switch is pushed in by a protrusion at the time of rotation of a rotation piece. It is a perspective view of the conventional turntable. It is an internal block diagram of the conventional turntable.

Explanation of symbols

(1) Turntable
(2) Fixed base
(3) Rotating piece
(10) First cover body
(12) Support roller

Claims (4)

In the turntable in which the rotation piece (3) is rotatably provided on the fixed stand (2),
A rotating table characterized in that a ball bearing (23) in contact with the other is provided at the center of either the fixed table (2) or the rotating piece (3). The turntable according to claim 1, wherein the turntable (3) is placed on the fixed stand (2) via a roller (30) provided at a peripheral edge thereof. The rotating piece (3) is covered with a cover body (10), and the top surface of the cover body (10) is a support roller that receives both sides of the central portion of the bottom surface of the image display device (4) to be attached to the rotating piece (3). The turntable according to claim 1 or 2, wherein (12) is provided. An image display device unit comprising the turntable according to claim 1.

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