JP3308933B2 - Leg height adjustment structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leg height adjusting mechanism for adjusting a projection angle or the like by a projector.

[0002]

2. Description of the Related Art A projector support structure is used as a means for adjusting a projection angle of a projector.

Conventionally, as a supporting leg of a projector, two supporting legs are respectively provided as a front leg and a rear leg, or two supporting legs are provided as a front leg and one supporting leg is provided as a rear leg. And one support leg as a rear leg.

The configuration for adjusting the projection angle of the projector is such that the height of the front leg or the rear leg can be continuously adjusted.

[0005] As a structure capable of continuously adjusting the height, a male screw portion is provided on a leg portion, a female screw portion is provided on a projector main body side, and these are screwed together.

[0006]

However, the conventional projector support structure described above has a problem that the workability is poor because the height adjustable range is insufficient.

The reason is as follows. That is, in the adjusting mechanism using a screw, the adjustable range is determined by the length of the male screw. In order to store the adjusting mechanism in the projector main body, the length of the male screw portion may be longer than the height of the projector main body. Therefore, a sufficient height adjustable range cannot be secured. To compensate for this lack of height adjustment, it is necessary to insert and insert an object between the projector support leg and the installation surface to secure the required height.
Workability is getting worse. In addition, the appearance when the projector is installed is impaired.

An object of the present invention is to provide a projector support structure provided with means for separately adjusting the height in addition to the height adjustment using the legs.

[0009]

In order to achieve the above object, a leg height adjusting mechanism according to the present invention is provided with a height adjustable leg at a front edge and a rear edge of an apparatus main body, and further comprises: Rotation support legs are provided which fall up and down in front and rear of the device body beyond the height adjustable range of the leg portions with the intermediate position between the front edge and the rear edge of the device body as a fulcrum, and A front edge or a rear edge of the apparatus main body is supported, and height adjustment is performed instead of the legs.

An intermediate position between the front edge and the rear edge of the apparatus main body is the position of the center of gravity of the apparatus main body.

Further, the rotary support leg is attached to a ceiling, and the apparatus main body is suspended from the ceiling by the rotary support leg.

Further, the rotary support leg is used as a handle.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing a leg height adjusting mechanism according to one embodiment of the present invention, and FIG. 2 is a front view showing a rotary support leg used for the leg height adjusting mechanism according to one embodiment of the present invention. Figure,
FIG. 3 is a sectional view taken along line AA of FIG.

A leg height adjusting mechanism according to an embodiment of the present invention shown in FIG. 1 includes legs 2, 3, 4, and 5 whose height can be adjusted at a front edge 1a and a rear edge 1b of a projector main body 1. Each of them is provided, and is raised and lowered in front and rear of the projector main body 1 beyond a height adjustable range of the legs 2, 3, 4, and 5 with the intermediate position between the front edge 1a and the rear edge 1b of the projector main body as a fulcrum. A rotating support leg 6 for tilting down, and supporting the front edge 1a or the rear edge 1b of the projector body 1 by the rotation support leg 6,
The height adjustment is performed instead of the legs 2, 3, 4, and 5.

An intermediate position between the front edge portion 1a and the rear edge portion 1b of the projector main body 1 is set at the center of gravity of the projector main body 1 so as to maintain the balance when the projector main body 1 is moved up and down. I have to.

Further, female threads (not shown) are provided on the front edge 1a and the rear edge 1b of the projector main body 1, and the shafts 2a, 3a, 4a, and 4a of the legs 2, 3, 4, and 5, as shown in FIG. 5a
Is provided with a male screw portion (not shown), and the male screw portions of the legs 2, 3, 4, and 5 are screwed into the female screw portion of the projector body 1,
The height of the front edge portion 1a and the rear edge portion 1b of the projector main body 1 is adjusted within the range of the length of the male screw portion.

As shown in FIG. 4, the legs 2, 3, 4, 5
Has an arc-shaped end face that contacts the installation surface of the projector body 1.

In adjusting the height of the front edge 1a and the rear edge 1b of the projector main body 1 by the legs 2, 3, 4, and 5, the legs 2, 3, 4, and 5 are used in the above-described example. Although the vertical movement is performed by the combination of the male screw section and the female screw section, the present invention is not limited to this configuration. As long as the configuration adjusts the height of the edge 1b, any general-purpose one may be used.

As shown in FIGS. 1 and 2, the rotary support leg 6 is formed in a gate shape. Leg portions 6a, 6a located on the left and right sides of the rotary support leg 6 have a front edge portion 1a and a rear edge portion of the projector main body 1. Projector body 1 at an intermediate position (center of gravity position) with unit 1b
Are rotatably mounted on both side surfaces of the
The horizontal posture along the side surface of the projector main body 1 and the forward tilt posture of FIG. 7 and the rear tilt posture of FIG. 8 in which the rotation angle θ continuously changes with respect to the horizontal posture are switched. And the like. When the fixing means is released, the rotation angle θ is changed to a posture in which the rotation angle θ continuously changes with respect to the lateral posture.

Further, as shown in FIGS. 2 and 3, a cross-section 6c for connecting the legs 6a of the rotary support leg 6 has an arc-shaped end surface which comes into contact with the installation surface of the projector main body 1, and has a central portion. The middle and high section 6c abuts on the installation surface of the projector main body 1, and switches and supports the front edge 1a and the rear edge 1b of the projector main body 1 in cooperation with the legs 6a, 6a.

Therefore, as shown in FIG.
8 or the rotation support leg 6 is tilted rearward as shown in FIG. 8, and the beam 6c abuts on the installation surface of the projector main body 1, and cooperates with the legs 6a, 6a to form the projector main body 1
Is supported at a height position to be adjusted, and the legs 6a, 6a are fixed in that posture.

Further, as shown in FIG. 10, by fixing the legs 6a, 6a of the rotary support leg 6 in a horizontal position, the rotary support leg 6 is used as a handle when the projector body 1 is conveyed or the like. In this case, the beam 6 of the rotary support leg 6
b functions as a grip of the handle.

Further, as shown in FIG.
“b” is attached to the ceiling 7 via a mounting bracket 8, and the projector main body 1 is suspended from the ceiling 7 by the rotation support leg 6.

The ceiling 7 indicates not only the ceiling of the room where the projector is used, but also the installation position of the projector which is taller than the office disk on which the projector is installed.

Next, the operation of adjusting the height of the projector using the leg height adjusting mechanism according to one embodiment of the present invention will be described with reference to the drawings.

The operation when the adjustment amount of the projection angle of the projector is small will be described with reference to FIGS.

First, when raising the projection angle of the lens 9 of the projector main body 1, as shown in FIG. 5, the legs 2, 3 on the front edge side of the projector main body 1 are moved up and down by screws, and the projector 1 is tilted backward.

When lowering the projection angle of the lens 9 of the projector main body 1, as shown in FIG. 6, the legs 4, 5 on the rear edge side of the projector main body 1 are moved up and down by screws, and the projector 1 is tilted forward.

Next, adjustment when the projection angle of the projector is large will be described with reference to FIGS.

First, when the projection angle of the lens 9 of the projector main body 1 is increased, as shown in FIG. 7, the front edge 1a of the projector main body 1 is supported and lifted by hand, and the fixing of the rotation support leg 2 is released. Legs 6a, 6a of rotation support leg 2
7 by continuously changing the rotation angle θ of FIG.
Tilt forward as shown.

The rotation angle θ of the legs 6a of the rotary support leg 2
Is adjusted to adjust the height position of the front edge 1a of the projector body 1, and after the adjustment, the rotation support leg 2 is fixed.

If a fine adjustment is required after the height adjustment by the rotary support leg 2, the adjustment is performed by moving the legs 4, 5 on the rear edge 1b side of the projector body 1 up and down.

When the projection angle of the lens 9 of the projector main body 1 is reduced, as shown in FIG. 8, the rear edge 1b of the projector main body 1 is supported and lifted by hand, and the fixing of the rotation supporting leg 2 is released. The rotation angle θ of the legs 6a of the support leg 2 is continuously changed, and the rotation support leg 6 is tilted backward as shown in FIG.

The rotation angle θ of the legs 6a of the rotary support leg 2
Is adjusted to adjust the height position of the rear edge 1b of the projector main body 1, and after the adjustment, the rotation support leg 2 is fixed.

If fine adjustment is required after the height adjustment by the rotary support leg 2, the adjustment is performed by moving the legs 2, 3 on the front edge 1a side of the projector body 1 up and down.

In the adjustment when the projection angle of the projector is large, the arc 6c of the beam 6b of the rotary support leg 2 makes point contact with the installation surface of the projector main body 1, but the leg on the front edge 1a side of the projector main body 1. 2, 3 or trailing edge 1b
The projector body 1 is stably supported at the three points of the side legs 4 and 5.

The operation when the apparatus is installed on a ceiling or the like will be described with reference to FIG. In this case, the rotation support leg 2 of the projector main body 1 is attached to the ceiling 7 with the mounting bracket 8. Then, the projector body 1 is connected to the rotation support legs 2.
Are rotated about the rotation support positions of the legs 6a, 6a, and the projection angle of the lens 9 of the projector body 1 is adjusted.

The operation of transporting the projector will be described with reference to FIG. In this case, the legs 6a, 6a of the rotary support leg 2 are fixed in a horizontal position along the side surface of the projector main body 1, and the beam 6b of the rotary support leg 2 is
To the front of And the beam 6b of the rotation support leg 2
Handle the projector as a handle.

In the embodiment, the projector body 1
Although the case where the height of the device is adjusted has been described, any device other than the projector body 1 may be used as long as the height is adjusted by tilting the front edge or the rear edge of the device body forward or backward. May be.

[0041]

As described above, according to the present invention, the intermediate position between the front edge and the rear edge of the apparatus main body is used as a fulcrum to extend the front and rear of the apparatus main body beyond the height adjustable range of the leg. Since the rotating support leg is provided to support the front edge or the rear edge of the apparatus main body and the height is adjusted instead of the leg, the height of the apparatus main body can be adjusted. The range can be expanded.

Further, since the height adjusting mechanism is provided on the apparatus main body side, it is not necessary to provide the height adjusting mechanism on the mounting bracket, so that the structure of the mounting bracket for mounting the projector or the like on a ceiling or the like can be simplified.

Further, the rotary support leg can be used as a handle for transportation.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a leg height adjusting mechanism according to an embodiment of the present invention.

FIG. 2 is a front view showing a rotation support leg used for a leg height adjusting mechanism according to one embodiment of the present invention.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a detailed view showing a leg.

FIG. 5 is a diagram illustrating an operation when the adjustment amount of the projection angle of the projector is small.

FIG. 6 is a diagram illustrating an operation when the adjustment amount of the projection angle of the projector is small.

FIG. 7 is a diagram illustrating an operation when the adjustment amount of the projection angle of the projector is large.

FIG. 8 is a diagram illustrating an operation when the adjustment amount of the projection angle of the projector is large.

FIG. 9 is a diagram for explaining an operation when the apparatus is installed on a ceiling or the like.

FIG. 10 is a diagram illustrating an operation when transporting the projector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Projector body 2, 3, 4, 5 Leg 6 Rotation support leg 6a Leg of rotation support leg 6b 7 Ceiling of rotation support leg

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G03B 21/00

Claims (4)

(57) [Claims] 1. A height-adjustable leg is provided at a front edge and a rear edge of an apparatus main body, and the height of the leg is set at a middle point between the front edge and the rear edge of the apparatus main body as a fulcrum. A rotary support leg that rises and falls forward and backward of the apparatus main body beyond the adjustable range, and supports the front edge or the rear edge of the device main body with the rotary support leg, and adjusts the height instead of the legs. A leg height adjustment mechanism characterized by performing. 2. The leg height adjusting mechanism according to claim 1, wherein an intermediate position between a front edge portion and a rear edge portion of the device main body is a position of a center of gravity of the device main body. 3. The leg height adjusting mechanism according to claim 1, wherein said rotary support leg is attached to a ceiling, and said apparatus main body is suspended from said ceiling by said rotary support leg. 4. The leg height adjusting mechanism according to claim 1, wherein the rotation supporting leg is used as a handle.