JP2005136651A - Flat panel display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the rotating operation of the stand of a flat panel display device from being stopped within a self-standing stop inhibiting range. <P>SOLUTION: A flat panel display device 1 is equipped with a stand 2 pivotally supported so as to be freely rotatable by a rotating operation accompanied by a torque of a fixed value or greater on the back surface. Rotation torque within a stop inhibition range from a position in parallel with the back surface to the back part of the display device to a predetermined angle is set so as to be 0 or a predetermined value or less. For this purpose, this flat panel display device is provided with: a steel sphere 13 set at either the rotation side or fixed side of the supporting shaft of the stand 2 and pressed to the other side by a spring; a torque board 22 formed at the opposite side of the rotation side and the fixed side and abutted to the steel sphere 13; and a regressing part formed on the orbit of the steel sphere 13 on the torque board 22 and at a part corresponding to the stop inhibition range. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a thin display device such as a liquid crystal television, and more particularly to a thin display device including a rotatable stand on the back surface facing obliquely downward.

Conventionally, in a thin display device such as a liquid crystal television, there is a case where both a case of installing on a desktop and a case of hanging on a wall are used. In that case, a so-called photo stand type stand is provided on the back of the display device. The stand is pivotally attached to the back of the display device, and when the display device is installed on a table, the lower end of the stand is inclined downward and comes into contact with the table top, and the display device falls back. Support as if not. In the case of wall mounting, the stand is folded in parallel with the display device so as not to obstruct the wall hanging. In addition, when installing on a tabletop, the rear stand is opened and closed in order to adjust the front angle of the display device to an arbitrary angle. In order to maintain the adjusted angle by adjusting the angle of the stand in this way, a mechanism that generates torque in accordance with the rotating operation of the stand is provided on the support shaft portion of the stand. As this mechanism, a combination of a steel ball and a spring plate has been proposed. Moreover, as a mechanism for adjusting the angle of other display devices, those described in Patent Documents 1 to 3 have been proposed.
JP-A-8-261392 JP 2001-51750 A JP 2002-196686 A

  By the way, when the stand of the thin display device described above is focused on the rotation range when the display device is supported on a table, as shown in FIGS. 1 to 3, the stand is parallel to the back surface of the display device. There is a range in which the expansion operation of the stand should not be stopped because the angle of the display device is nearly vertical and does not satisfy the prescribed fall angle condition from the angle to a certain angle that is gradually opened. If the stand is stopped within this stop prohibition range, the display device may not be able to stand on its own, and even if it can stand on its own, it may become unstable and there is a risk that it will fall over with a slight external force applied. Therefore, in order to prevent the user from stopping the stand within this stop prohibition range, conventionally, a label to that effect is attached to the instruction manual or a note indicating the caution is attached to the stand. Despite caution, there was no guarantee that it would be well known. Accordingly, an object of the present invention is to prevent the rotation operation of the stand of the thin display device from being stopped within the stop prohibition range.

  In order to solve the above-described problems, the present invention provides a thin display device having a stand that is rotatable at least in the vertical direction A on the back surface, and the display screen of the thin display device is nearly vertical by the turning operation of the stand. While being held within the angular range, the rotation torque of the stand is set to about zero. More specifically, in a thin display device having a stand that is pivotally supported by a pivoting operation with a torque greater than a certain value on the back surface so as to be freely pivotable in the vertical direction A, the stand opens rearward from a position parallel to the back surface. The rotational torque within the stop prohibition range up to an angle is set to 0 or a predetermined value or less. For this purpose, a steel ball provided on either the rotating side or the fixed side of the support shaft portion of the stand and pressed against the other side by a spring, and provided on the other side of the rotating side and the fixed side. A torque plate abutted against the steel ball, and a retracted portion formed on a corresponding portion of the stop prohibited range on the trajectory of the steel ball on the torque plate. Further, it is preferable that the retracted portion is a cutout hole formed in the torque plate. Furthermore, the tip of the stand is preferably formed in an acute angle shape.

  As described above, according to the present invention, in a thin display device having a stand that is rotatable at least in the vertical direction on the back surface, the rotation of the stand is within the stop prohibition range where the screen angle of the thin display device is nearly vertical. By setting the torque to 0 or a predetermined value or less, when the user rotates the stand, it is felt unnatural that the rotation operation is stopped in the stop prohibition range where the torque is 0 or the predetermined value or less. Thus, the rotation operation is stopped within a range in which the thin display device can be safely made independent, and the thin display device can be prevented from falling.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side view of an embodiment of a thin display device according to the present invention, and shows a rotation range of a stand. FIG. 2 shows a state in which the stand is closed in FIG. 1 and cannot stand by itself, and FIG. 3 shows a state in which the stand can be opened in FIG. In these drawings, reference numeral 1 denotes a liquid crystal television which is a thin display device, and a stand 2 is pivotally supported at a lower position on the back side. Above the stand 2 is attached a ring 3 used when hanging on the wall. Further, a remote controller 4 is detachably attached to the outside of the ring 3. As shown in FIG. 1, the stand 2 is in a position A that is substantially parallel to the rear surface of the liquid crystal television 1 in a closed state, and is rotated from the position to the position B with a torque of 0 or a minute value. Is done. Between AB, even if the stand 2 is stopped, the liquid crystal television 1 cannot be made independent or unstable even if it is self-supported, and the regulation of the fall angle cannot be satisfied. In the standard of the fall angle, it is determined to be 10 degrees or more with respect to the vertical, but in the illustrated example, it is independent when it is 15 degrees or more so as to be safer.

  Thus, since torque is not required for the rotation operation of the stand 2 between AB, since the user who rotates the stand 2 does not respond sensuously, hesitate to stop the rotation operation. The rotation operation is continued until the position B is reached. Next, the position B to the final position C of the rotation range is a range that requires a torque greater than a certain value for the rotation operation. Within this range, the user can adjust the angle so that the screen orientation of the liquid crystal television 1 becomes an optimum angle, and when the rotation operation is stopped, the stand 2 is stably held at that position. In this range, if the stand 2 is to be changed to another angle, a rotating torque greater than a certain value must be applied to the stand 2. The operation between these BCs is the same as that in a conventional stand.

  4 to 7 show the stand 2 and the metal part that supports it, FIG. 4 is a perspective view, FIG. 5 is a side view of the stand 2 in a closed state, and FIG. 6 is a plan view thereof. FIG. 7 is a front view thereof. As shown in FIGS. 4 and 7, the stand 2 is attached to the back surface of the liquid crystal television 1, and both ends of a rotating shaft 21 integrated with the stand 2 are supported by bracket fittings 11 and 12. As shown in FIG. 5, the connecting portion of the bracket metal member 12 and the rotating shaft 21 has a hole formed in the bracket metal member 12, and a steel ball 13 is attached thereto, and a spring (not shown) is directed from the back side toward the front side. Z). On the front side of the steel ball 13, a torque plate 22 that is integrally supported by the rotation shaft 21 and rotates together with the rotation shaft 21 is disposed.

  As a result, the steel ball 13 is pressed against the back surface of the torque plate 22. The torque plate 22 is formed with a long hole 23 and a round hole 24 along the locus on which the steel ball 13 comes into contact when the stand 2 is rotated. Here, while the stand 2 rotates between AB in the counterclockwise direction of FIG. 1, the steel ball 13 is positioned in the long hole 23, so that the steel ball 13 does not contact the torque plate 22. Torque becomes 0 or a minute value. Next, while the stand 2 rotates between the BCs counterclockwise in FIG. 1, the steel ball 13 contacts the torque plate 22 and a torque proportional to the pressing force is generated. Next, when the stand 2 reaches the C position, the steel ball 13 is inserted into the round hole 24, and the stand 2 is stabilized at that position. Similarly, when the stand 2 is rotated in the clockwise direction, torque is generated or lost depending on the position.

  A stopper (not shown) is provided between the bracket fitting 12 and the rotating shaft 21 so that the steel ball 13 does not deviate from the range between the upper end of the long hole 23 and the round hole 24. The torque generating mechanism in which the torque plate 22 and the steel ball 13 are combined is a technique widely used in the stand of the conventional liquid crystal television. The present invention forms a long hole 23 in the torque plate 22 anew. Torqueless range. Here, the long hole 23 is not formed on the torque plate 22, but instead a groove that recedes in the direction away from the steel ball 13 is formed in the torque plate 22, and the magnitude of the torque is adjusted by the depth. It is also possible to do. Further, in the illustrated example, the steel ball 13 is provided on the bracket metal fitting 12 side and the torque plate 22 is provided on the rotating shaft 21 side. However, these positional relationships are relative and should be arranged opposite to each other. Is also possible. Further, since the stand 2 is formed in a sharp pointed tip, the load per unit area of the contact portion between the stand 2 and the desk top surface is relatively large, and the frictional force accordingly. As a result, the effect of preventing slipping is obtained.

  INDUSTRIAL APPLICABILITY The present invention can be used for electronic devices, furniture, display devices, and the like provided with a stand that can be rotated in the vertical direction on the backside, in addition to thin display devices such as liquid crystal televisions.

It is a side view of one Embodiment of the thin display apparatus which concerns on this invention, and shows the rotation range of a stand. It is a side view which shows the state of the range which cannot stand independence which closed the stand in FIG. It is a side view which shows the state which can open the stand in FIG. 1, and can be stabilized independently. It is a perspective view which shows the stand of FIG. 1, and the metal fitting part which supports it. It is a side view which shows the stand of FIG. 1, and the metal fitting part which supports it. It is a top view which shows the stand of FIG. 1, and the metal fitting part which supports it. It is a front view which shows the stand of FIG. 1, and the metal fitting part which supports it.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 LCD television 2 Stand 3 Ring 4 Remote control 11, 12 Bracket bracket 13 Steel ball 21 Rotating shaft 22 Torque plate 23 Long hole 24 Round hole

Claims (5)

In a thin display device provided with a stand that can rotate at least A: the display screen angle in the vertical direction on the back surface,
A thin display device characterized in that the rotation torque of the stand is set to about 0 while the display screen of the thin display device is held within an angle range close to vertical by the rotation operation of the stand. In a thin display device having a stand pivotally supported on the back so as to be pivotable in the vertical direction by a pivoting operation with a torque greater than a certain value.
A thin display device characterized in that a rotating torque within a stop prohibition range up to a predetermined angle when a stand opens rearward from a position parallel to the back surface is set to 0 or a predetermined value or less. The thin display device according to claim 1 or 2,
A steel ball provided on either the rotating side or the fixed side of the support shaft portion of the stand and pressed against the other side by a spring;
A torque plate provided on the other side of the rotating side and the fixed side and in contact with the steel ball;
A retracted portion formed on a corresponding portion of the stop prohibited range on the trajectory of the steel ball on the torque plate;
A thin display device comprising: The thin display device according to claim 3.
A thin display device characterized in that the retracted portion is a cut-out hole formed in the torque plate. The thin display device according to any one of claims 1 to 4,
A thin display device, wherein a tip of the stand is formed in an acute angle shape.

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