Optics: image projectors – Distortion compensation – For projection axis inclined to screen
Reexamination Certificate
2003-01-26
2004-04-13
Dowling, William C. (Department: 2851)
Optics: image projectors
Distortion compensation
For projection axis inclined to screen
Reexamination Certificate
active
06719431
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to an adjusting apparatus, and more particularly to the adjusting apparatus for a projector.
BACKGROUND OF THE INVENTION
As the science being developed rapidly, projectors are applied to various fields, such as the consumption products to high technology products, and the application range is expanded continuously. For instance, the exhibitions for big conference rooms or commercial projecting screens or televisions are to cooperate with the presentation contents for instantly showing. However, a general type of projectors has to be adjusted for the height of the projection lens so that the projected image is in a proper position. Therefore, how to fast and easily set up a projector for a user being pleasured to operate and then promoting the competition becomes an important issue in the field.
Please refer to
FIG. 1
, which is a projector
10
in prior arts. For the purpose of the installment convenience and the clean appearance, generally an adjusting apparatus
12
is designed below a body
11
. Then, pressing an adjusting button
121
is to let a supporter
122
move freely along a vertical direction for a selected inclined height, so a projection lens
13
is aimed at a screen. Referring to
FIG. 2
, a bottom of the adjusting button
121
combines with a bottom of a catching section
123
, and another end of the catching section
123
is set a catching flange
124
, which is able to engage with a positioning rack
125
of the supporter
122
. Further, the bottom of the adjusting button
121
and the catching section
123
has an elastic element
126
, and one end of the elastic element
126
is fastened on a body
127
. Therefore the adjusting button
121
and the catching section
123
are in a slide
251
of the body
127
and freely move. While pressing the adjusting button
121
to move the catching section
123
inward, the catching flange
124
is then released from the positioning rack
125
so that the supporter
122
freely moves along the vertical direction for a suitable inclined height. The next step is to release the adjusting button
121
to drive a match of catching flange
124
and positioning rack
125
for keeping a selected height of supporter
122
. Due to the projector
10
being applied in a dark environment and the adjusting apparatus
12
being installed below the body
11
causing hardly finding out adjusting button
121
, a user must take several times to correctly press on adjusting button
121
to finish fixing the height of projector. Besides, the adjusting button
121
is set aside of the supporter
122
, so a pressing force is not uniform in case of pressing on adjusting button
121
to bring about the inclined phenomena of the adjusting button
121
and the catching section
123
, shown as a dotted line
129
. Then, the catching flange
124
cannot smoothly depart from the positioning rack
125
. Hence it must apply a harder force to let catching flange
124
come off the positioning rack
125
for completing the height adjustment of the projector.
SUMMARY OF THE INVENTION
An object of the present invention is to provide an adjusting apparatus for a projector to have a uniform force for guiding an adjusting button and a catching section to simultaneously move and creating more convenient operation.
The other object of the present invention is to provide an adjusting apparatus for a projector to have an extended adjusting button to be easily pressed and found out for more convenience.
To approach aforesaid objects, the present invention comprises a body, an upper cover which forms a slide with the body, and a catching section in the slide. A side of a front surface of the catching section has at least one protrusive catching piece, another side of the catching section connects to an adjusting button with extended width, and the adjusting button is protruded from the body. A sliding sleeve sets on a side of a front of the body, and a supporter is through the sliding sleeve. A back of the supporter has a plurality of positioning rack matching with the catching piece. Besides, a rear side of the catching section is fastened on one end of a restoring element, and the other end is fixed on a rear wall of the body. The rear side of the catching section has a guiding element, which two opening ends are through a top edge of the rear wall to attach to a guiding slot formed by two restricting blocks for guiding the catching section to move smoothly.
REFERENCES:
patent: 6302543 (2001-10-01), Arai et al.
patent: 6461002 (2002-10-01), Su
patent: 2002/0113951 (2002-08-01), Huang et al.
patent: 2002/0140909 (2002-10-01), Tanaka
patent: 2002/0153465 (2002-10-01), Su
Kao Fu-Shun
Liu I-Hsien
Coretronic Corporation
Dowling William C.
Hsu Winston
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