Supports – Stand – Standard type
Reexamination Certificate
2001-11-15
2003-02-25
Braun, Leslie A. (Department: 3632)
Supports
Stand
Standard type
C248S655000, C248S656000, C248S649000, C411S433000, C411S437000
Reexamination Certificate
active
06523799
ABSTRACT:
BACKGROUND OF INVENTION
1. Field of the Invention
The present invention relates to an adjustable-height stand. More specifically, the present invention discloses a stand with fine adjustment and rough adjustment functions.
2. Description of the Prior Art
In a common projector or a related product, an adjustable-height stand is used to adjust the height or angle of elevation of the projector to aim an image onto a screen or wall. Therefore, designing an easy-to-use adjustable-height stand is an important goal for designers.
Please refer to FIG.
1
.
FIG. 1
is a structural diagram of a stand
10
of a prior art projector. The stand
10
is used to support a projector
12
. As shown in
FIG. 1
, the stand
10
of the prior art projector comprises a screw rod
14
, and an adjusting mechanism
16
for supporting the projector
12
. The adjusting mechanism
16
comprises a screw hole
1
8
through which it is installed on the screw rod
14
. Users rotate the screw rod
14
to drive the adjusting mechanism
16
up and down so as to adjust the height or the angle of elevation of the projector.
However, the design of the stand of the prior art projector is inconvenient for large adjustments. To make an adjustment to the height of the adjusting mechanism
16
, users must rotate the screw rod
14
until the adjusting mechanism
16
is at the desired height. For small adjustments, this is a fairly quick operation, but large adjustments can take a long time, as there is no quick way to change the height of the adjusting mechanism
16
. In other words, the stand
10
of the prior art projector has a fine adjustment function but does not have a rough adjustment function.
SUMMARY OF INVENTION
It is therefore a primary objective of this invention to provide a stand that has both fine adjustment and rough adjustment functions.
The claimed invention, briefly summarized, discloses a stand for supporting a predetermined device. The stand comprises a screw rod, a supporting mechanism, and an adjusting mechanism. The supporting mechanism supports the predetermined device. The adjusting mechanism is installed on the screw rod and connected to the supporting mechanism for adjusting the height of the supporting mechanism. The adjusting mechanism comprises a hole portion through which the adjusting mechanism is installed on the screw rod. The hole portion comprises an upper U-shaped wall and a lower U-shaped wall. The upper U-shaped wall is positioned on a front-upper region of the hole portion, the upper U-shaped wall having a first screw thread. The lower U-shaped wall is positioned on a back-lower region of the hole portion, the lower U-shaped wall having a second screw thread. The upper and lower U-shaped walls are positioned opposite each other and can separate from the screw rod. When the upper and lower U-shaped walls contact with the screw rod, the adjusting mechanism is moved up and down by rotating the screw rod, and when the upper and lower U-shaped walls separate from the screw rod, the adjusting mechanism is capable of sliding along the screw rod.
It is an advantage of the claimed invention that the adjusting mechanism can tilt at an angle in order to separate from the screw rod. This allows the supporting mechanism to slide along the screw rod. The claimed invention stand provides both fine adjustment and rough adjustment functions.
REFERENCES:
patent: 422361 (1890-03-01), Alton
patent: 3878757 (1975-04-01), Puklus, Jr.
patent: 4693656 (1987-09-01), Guthrie
patent: 5785480 (1998-07-01), Difeo
patent: 5868538 (1999-02-01), Rathbun
patent: 5898974 (1999-05-01), Boyer
Brann Deborah M.
Braun Leslie A.
Hsu Winston
Primax Electronics Ltd.
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