JPH11338363A - Screen length and breadth switching mechanism of thin shaped display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a screen length and breadth change-over mechanism in a thin shaped display. SOLUTION: A link 14 is arranged between a display part 11 and a stand 12. The upper end (a rotary axis part A) of the link 14 is mounted on the stand 12 so as to be turned and able to keep a turned angle (by a friction force, etc., using a spring), and the lower end (a rotary axis part B) of the link 14 is mounted at a position eccentric from the screen center O of the display part 11 so as to be turned and able to keep the turned angle. When the display part 11 is turned centering the rotary axis part B by an angle ' from an oblong state in (1), it becomes a state shown in (2). Following this, when the display part is turned centering the rotary axis part A by an angle β (α+β=90 deg.), the display part 11 becomes a longitudinal state as shown in (3). The screen center O of the display part 11 in the oblong state is lower by (s) than that of the display part 11 in the longitudinal state. In the oblong state, a space more than necessary is not produced under the display part. Thus, a turning operation of the display part 11 and a vertical movement of the display part 11 are combined, and the structure is substantially simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical / horizontal switching mechanism of a thin display device for switching the vertical / horizontal direction of a screen in a thin display device such as a liquid crystal monitor.

[0002]

2. Description of the Related Art Some thin display devices such as a liquid crystal monitor can use a screen horizontally or vertically, but in this type of conventional thin display device, as shown in FIG. A structure is adopted in which the portion of the center O of the part 1 is attached to the stand 2 so as to be rotatable around the center O. That is, a rotation mechanism that supports and rotates the center of the display unit 11 is provided. And if you do n’t want more space below the screen in landscape mode,
A vertical movement mechanism (not shown) that slides the display unit 1 up and down together with the rotation mechanism is separately provided. That is, in FIG. 6, (a) shows the screen of the display unit 1 in a vertically long state. When the display unit 1 in the vertically long state is rotated by 90 ° as shown by an arrow, the display unit 1 becomes horizontally long as shown in (b). State. In this state, the space below the display unit 1 is smaller than in the vertically long state.
The display unit 1 is slid downward by the vertical movement mechanism as shown in FIG.

[0003]

As described above, the conventional screen vertical / horizontal switching mechanism includes a rotating mechanism that rotatably supports the center O of the display unit 1 and a vertical movement mechanism that slides the display unit up and down. Since the structure is provided separately, there is a problem that the structure is complicated and the cost increases.

The present invention has been made in view of the above circumstances, and has a mechanism for performing a combination of an operation of rotating a display unit and an operation of moving the display unit up and down. And a screen vertical / horizontal switching mechanism having a simple structure, which does not have a separate function.

[0005]

SUMMARY OF THE INVENTION To solve the above-mentioned problems, the present invention is a screen vertical / horizontal switching mechanism in a thin display device in which a display unit is mounted on a stand so that the screen can be vertically / horizontally switched. The upper end of the link disposed on the stand is rotatably supported on the stand and the rotation angle thereof can be maintained, and the lower end of the link is rotated to a position eccentric downward from the center of the screen in a vertically-long screen state from the center of the screen. It is characterized in that it is supported so as to be able to maintain its rotation angle.

[0006]

FIG. 1 is a block diagram showing an embodiment of the present invention.
A description will be given with reference to the screen vertical / horizontal switching mechanism of the thin display device of the embodiment shown in FIG. FIG. 1 is a front view of a thin display device 10 such as a liquid crystal monitor provided with a screen vertical / horizontal switching mechanism 13 according to an embodiment of the present invention, FIG. 2 is a right side view of FIG. 1, and FIG. 3 is a plan view of FIG. is there. In these figures, reference numeral 11 denotes a display unit of the thin display device, and reference numeral 12 denotes a stand. Display unit 11
Is attached to the stand 12 via one link 14 having a length c as shown.

The upper end of the link 14 is rotatably mounted on the upper part of the center of the stand 12 in the width direction so as to be able to maintain its rotation angle (the rotation axis is indicated by A), and the lower end is the display unit 11. From the center O of the screen in a vertically long state (to the left in the horizontally long state in FIG. 1) so as to be rotatable at a position eccentric by an appropriate distance b and to be able to maintain the rotation angle (the rotation shaft portion thereof). Is indicated by B). Also,
In this embodiment, a pin 17 is fixed to, for example, the center of the screen on the back surface of the display unit 11, and a notch 18 with which the pin 17 can be engaged is provided on the link 14 side. In addition, the display unit 1 of the connection shaft portion A of the link 13 on the stand 12 side.
The distance from the center O of the screen surface 1 is a. Link 1
4, the rotation shaft portion A on the upper end side and the rotation shaft portion B on the lower end side
In either case, as shown in FIG. 5, for example, disc springs 22 and 23 are mounted on the respective rotating shafts 20 and 21 in a press-contact state, and the rotation angle of the link 14 is maintained by the frictional force of the disc spring 21. I have. In this case, the frictional force of the rotating shaft A at the upper end of the link 14 is set to be clearly stronger than the frictional force of the rotating shaft B at the lower end. That is, by using two disc springs having different magnitudes of spring force, the frictional forces at the two rotating shaft portions A and B are made different, so that even if the display portion 11 is rotated with respect to the link 14, Is the stand 1
The link 14 is set to rotate with respect to the stand 12 when a larger torque is applied without rotating by the frictional force between the link 14 and the stand 12. Note that the structure shown in FIG. 5 is a simplified one for schematically explaining a means for providing a difference in rotational torque between the two rotating shaft portions A and B.

The operation of switching the screen length and width in the thin display device 10 will be described. In FIG. 5, the screen of the display unit 11 is in a horizontally long state, and the rotation axis B of the link 13 on the display unit 11 side is on the left of the screen center O. The rotation shaft A of the link 13 on the stand 12 side and the rotation shaft B of the display unit 11 side
Are restricted in rotation by the frictional force of the disc springs 22 and 23, and the display unit 11 is held in a horizontally long state by the restricted force.

In this state, the display unit 11 is rotated counterclockwise by α around the rotation shaft B at the lower end of the link 13 as shown by the arrow. In this case, as described above, the link 13 has the frictional force between the link 13 and the stand 12 (the rotation shaft B).
(Greater than the frictional force at), and does not rotate. Therefore, the pin 17 on the back surface of the display unit 11 is engaged with the notch 18 of the link 13. At this time, as shown in FIG. 5B, the center line n in the width direction of the display unit 11 in the vertically long state coincides with the center line of the link 13.

[0010] From the state of FIG.
The display unit 11 is centered on the rotation shaft A at the upper end of the display unit 4.
Further, it is rotated by β (α + β = 90 °). During this rotation, since the pin 17 of the display unit 11 is engaged with the link 14, the display unit 11 and the pin 17 rotate integrally. Thereby, the screen of the display unit 11 is in a vertically long state as shown in FIG.

Here, the difference s between the height position of the screen center O of the display unit 11 in the vertically long state and the height position in the horizontally long state is s = b− (c), as is clear from the geometrical relationship. −a) = a
+ B−c (where c is the length of the link 14). Since a + b> c always holds, s> 0 always holds. That is, in the vertically long state (c), the screen center position of the display unit 11 rises by the distance s. Conversely, when switching from the vertical state (c) to the horizontal state (b), the display unit 11
Of the screen center O of the image is lowered by the height s. Therefore, no unnecessary space is generated below the display unit 11 in the horizontally long state.

The means for maintaining the rotation angles of the rotation shaft portions A and B of the link 14 is not limited to the above-described embodiment, and various means can be considered.

[0013]

According to the screen vertical / horizontal switching mechanism of the present invention,
It is a structure that switches the screen vertically and horizontally by one operation combining the rotation operation of rotating the display unit and the vertical movement operation of moving the display unit up and down. This is a simple mechanism using one link Therefore, as compared with the conventional structure in which the rotating mechanism and the vertical movement mechanism are separately provided, the effects of greatly simplifying the structure and increasing the number of parts are obtained.

[Brief description of the drawings]

FIG. 1 is a front view of a thin display device provided with a screen vertical / horizontal switching mechanism according to an embodiment of the present invention.

FIG. 2 is a right side view of FIG.

FIG. 3 is a plan view of FIG. 1;

FIG. 4 is a diagram illustrating details of a rotation axis portion of a link in the screen vertical / horizontal switching mechanism.

FIG. 5 is an explanatory diagram of an operation of switching the screen length and width in the thin display device described above, in a case where the vertical state is changed from the vertical state of (a) to the vertical state of (c) through the middle state of (b). is there.

FIG. 6 is a front view of a thin display device provided with a conventional screen vertical / horizontal switching mechanism, in which the vertical state is changed from the vertical state of (a) to the vertical state of (c) through the middle state of (b). is there.

[Explanation of symbols]

 Reference Signs List 10 Thin display device 11 Display unit 12 Stand 13 Screen vertical / horizontal switching mechanism 14 Link 21, 23 Disc spring

Claims (1)

[Claims] 1. A screen vertical / horizontal switching mechanism in a thin display device in which a display unit is mounted on a stand such that the screen can be vertically / horizontally switched, wherein an upper end of a link disposed between the display unit and the stand is rotatable on the stand. In addition to supporting the rotation angle so as to be maintained, the lower end of the link is rotatably supported at a position eccentric downward from the center of the screen in a vertically long state of the screen so that the rotation angle can be maintained. A screen vertical / horizontal switching mechanism for a thin display device.