JPH11352586A - Display device with inclination angle regulating function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent detaining of leg parts from being released, even if vibration is applied thereon by a constitution such that a lever for detaining the leg to support a display device turns around a revolving shaft and that the position of the revolving shaft is nearly the same as the centroid position of the lever. SOLUTION: A projector body is supported by a front leg 11 which is integral with a leg screw 2 and a stationary leg. A projecting part 3b of the lever 3 fits to a recessed part 8a of a lever release button 8. A compression spring 6 energizes the lever 3 clockwise around a rotation axis 5. External threads are cut on the outer periphery of the leg screw 2, and the threaded part 3d of the lever 3 enters into the thread valley part of the leg screw 2, by which the lever 3 and the leg screw 2 are detained. The front leg 11 is rotated to finely adjust the angle of the projector body and a ground contact surface. The position of the center of the revolving shaft 5 and the centroid position of the lever 3 are made the same. The displacement of the lever 3 by the vibration occurs at the same time on the leg screw 2 side of the lever 3 and the compression spring 6 side around the rotation axis 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device such as a projector, and more particularly, to a display device having a tilt angle adjusting mechanism.

[0002]

2. Description of the Related Art FIG. 4 is a sectional view showing the vicinity of a leg of a conventional projector in plan view. Hereinafter, the conventional technique will be described with reference to FIG. In order to adjust the height of the projector, the shaft 106 having an external thread cut on the outer periphery is taken in and out (moving the shaft 106 in a direction perpendicular to the paper surface). That is, when the release button 104 urged leftward by the spring 107 is pressed rightward, the locking between the root portion of the male screw of the shaft 106 and the shaft fixing plate 103 is released, and the shaft 106 becomes free. .

When the release button 104 is released at a desired position, the left side 3 of the shaft fixing plate 1 is moved rightward by the spring 107, and the root of the male screw of the shaft 106 and the shaft fixing plate 103 are locked.

[0004]

Since the unlocking of the legs is performed in a linear direction, when vibration is applied to the projector, the shaft fixing plate moves due to the vibration, and the unlocking of the legs is released. It could have been done. The present invention has been made in view of such a problem, and an object of the present invention is to provide a projector in which even when vibration is applied, the locking of the legs is not released.

[0005]

In order to solve the above-mentioned problems, according to the present invention, a leg for supporting a display device, a lever for locking the leg, and a bias for holding the lock between the lever and the leg are provided. Means, the lever is rotated about a rotation axis, and the position of the rotation axis is substantially equal to the position of the center of gravity of the lever.

Further, the distance from the center of the rotating shaft to the urging means is equal to the distance from the center of the rotating shaft to a position where the leg is locked to the leg.

[0007]

According to the present invention, since the position of the center of rotation of the lever and the position of the center of gravity of the lever are substantially at the same position, the locking can be prevented from being released even when vibration is applied.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. However, such embodiments do not limit the technical scope of the present invention. Since the structure of the projector is known, the description thereof is omitted. Note that the present invention is not limited to a projector, but can be applied to any device that projects an image.

FIG. 1 is a side view of a projector according to the present invention. The projector body 1 is supported by a front leg 11 and a fixed leg 10 integrated with the leg screw 2. In order to obtain a desired angle θ, it is performed by inserting and removing the leg screw 2. FIG. 2 is a sectional view in plan view showing the periphery of the leg screw, and FIG. 3 is a side view showing the periphery of the leg screw. The frame 4 is fixed to the projector main body 1 by screws 9. The lever 3 is rotatable around a rotation shaft 5.
The protrusion 3b of the lever 3 fits into the recess 8a of the lever release button 8. A compression spring 6 is inserted into the protrusion 3 c of the lever 3, and the compression spring 6 urges the lever 3 clockwise about the rotation shaft 5. The rotation range of the lever 3 is possible in the clockwise direction until it comes into contact with the leg screw 2, and in the counterclockwise direction, it is possible to come into contact with the lever rotation limit 4 d of the frame 4. An external thread is cut on the outer circumference of the leg screw 2, and the screw portion 3 d of the lever 3 enters the thread root of the leg screw 2, that is, the lever 3 and the leg screw 2 are locked, and the leg screw 2 is moved to the paper surface. To lock vertically (lever 3 shown by a solid line in FIG. 2).

To finely adjust the angle between the projector body 1 and the ground plane, the front legs 11 are rotated. When the front leg 11 is rotated clockwise, the leg screw 2 integrated with the front leg 11 rotates clockwise along the screw portion 3d, and the leg screw 2 is rotated.
And the angle between the projector main body 1 and the ground plane increases. Conversely, when the front leg 11 is rotated counterclockwise, the leg screw 2 contracts, and the angle between the projector main body 1 and the ground plane becomes smaller.

To roughly adjust the angle between the projector main body 1 and the ground plane, the lever release button 8 is pushed rightward. When the lever release button 8 is pushed rightward, the lever 3 having the convex portion 3b fitted into the concave portion 8a of the lever release button 8
Rotates counterclockwise about the rotation shaft 5. When the lever rotation limit 4d of the frame 4 comes into contact with the lever 3, the rotation of the lever 3 stops (the lever 3 indicated by a two-dot chain line in FIG. 2). By the rotation of the lever 3, the locking of the screw portion 3d of the lever 3 and the thread root of the leg screw 2 is released, and the leg screw 2 becomes free in a direction perpendicular to the paper surface. When the pressing of the lever release button 8 is stopped at a desired position, the lever 3 is rotated clockwise by the compression spring 6, and the screw portion 3d of the lever 3 and the screw root of the leg screw 2 are locked. Then, the leg screw 2 is locked.

From the relationship of the moment, if the distance from the center of the rotating shaft 5 to the center of the thread 3d of the lever 3 is equal to the distance from the center of the rotating shaft 5 to the center of the compression spring 6,
The force of the compression spring 6 and the pressing force required to press the lever release button 8 can be made equal. If the position of the center of the rotating shaft 5 and the position of the center of gravity of the lever 3 are made the same, the displacement of the lever 3 due to vibration will Since this occurs at the same time, the engagement between the lever 3 and the leg screw 2 does not come off.

[0013]

According to the present invention, the lever and the foot screw can be reliably locked even against vibration by the configuration in which the center of the rotation axis of the lever and the position of the center of gravity of the lever are the same.

[Brief description of the drawings]

FIG. 1 is a side view of a projector according to the present invention.

FIG. 2 is a sectional view in plan view showing the periphery of a leg screw;

FIG. 3 is a side view showing the vicinity of a leg screw;

FIG. 4 is a cross-sectional view in plan view showing the vicinity of a leg of a conventional projector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Projector main body 2 ... Leg screw 3 ... Lever 4 ... Frame 5 ... Rotating shaft 6 ... Compression spring 8 ... Lever release button 10 ... Fixed leg 11 ...・ Fore leg

Claims (2)

[Claims] 1. A leg for supporting a display device, a lever for locking the leg, and urging means for holding the lock between the lever and the leg, wherein the lever rotates about a rotation axis. The position of the rotation axis is substantially equal to the position of the center of gravity of the lever. 2. The tilt angle adjusting device according to claim 1, wherein a distance from the center of the rotating shaft to the urging means is equal to a distance from the center of the rotating shaft to a position where the leg is locked to the leg. Display with function.