Optics: image projectors – Color filter
Reexamination Certificate
2000-06-06
2001-07-31
Adams, Russell (Department: 2851)
Optics: image projectors
Color filter
C362S255000, C362S279000, C362S282000
Reexamination Certificate
active
06267478
ABSTRACT:
BACKGROUND OF THE INVENTION
(a) Technical Field of the Invention
The present invention relates to a pattern-changing structure for a projection light system and in particular, to pattern-changing structure having a rotating disc with various patterns, and by means of intermittent rotating method, the changing of patterns is obtained.
(b) Description of the Prior Art
Referring to
FIGS. 8-A
, and
8
-B, there is shown the structure of pattern rotating disc
60
for a projection light system, comprising a front and back clipping disc
61
, and a plurality of light-transmissive holes
62
are formed on the front and back clipping disc
61
. A spacer
63
is formed between the front and the back clipping disc
61
. Within the spacer
63
, a transmission module
64
is provided, wherein the center region of the spacer
63
is mounted with a main transmission disc
65
having a center mounting rod
651
. The circumferential edge of the main transmission disc
65
is formed into a teeth portion for the engagement with the teeth portion provided on a plurality of the lateral transmission disc
66
. One side of the transmission disc
66
is provided with a positioning ring
67
for mounting with a light-transmissive hole
62
, and a patterned disc
68
and a lens positioning seat
69
are mounted on the lateral transmission disc
66
. By means of a motor to drive the center mounting rod
651
and the main transmission disc
65
, and due to the engagement of the teeth portions of the main transmission disc
65
and the side transmission disc
66
, the patterned disc
68
is synchronously rotated. Thus, when the rotating disc
60
rotates, the patterned disc
68
and the lens securing seat
69
revolve. By means of the projection light system, a plurality of patterned light images are obtained.
The conventional rotating disc
60
requires a large amount of parts and therefore, the cost of manufacturing is high, and it is troublesome and laborious to assemble all the parts and this is not economical in production and/or application. The engagement of the teeth portion may cause into the problem of dead engagement. Although the number of patterned discs on the rotating disc
60
are numerous, but each patterned disc
68
is independent and it is troublesome and laborious in installation thereof.
Accordingly, it is an object to provide a pattern-changing structure for a projection light system so as to solve the drawbacks as mentioned.
SUMMARY OF THE INVENTION
Accordingly, it is the main object of the present invention to provide a pattern-changing structures for a projection light, wherein a plurality of different patterned images are obtained, and the images are transmitted intermittently.
Another aspect of the present invention is to provide a pattern-changing structure for a projection light system comprising a base plate, a rotating disc, a motor, a patterned disc, the base plate having a shaft hole at the center thereof, and a light transmissive hole being provided adjacent to the shaft hole and a center hole being provided to the center of the rotating disc, a plurality of circular hole being located at the rotating disc surrounding the center hole, a plurality of screws being provided on the surface of the rotating disc, the motor being mounted at one lateral side of the base plate and the shaft center of the motor being mounted with a cam passed through the base plate, and the center of the rotating disc and an engaging and a disengaging mechanism being combine to form integrally as a unit, characterized in that one lateral side of the base plate is provided with a stopping crankshaft having two ends, one end being mounted with a stopping region and the other end being a spring hook, the spring hook is connected to a pulling-spring, and a cavity hole is provided on the base plate such that the stopping region of the crankshaft is protruded out of the cavity hole, and the circumferential edge of the rotating plate is provided with a plurality of positioning teeth, each teeth being spaced apart at equal distance, thereby, when the motor rotates, the cam controls the extending or retraction of the stopping crankshaft to either release or restrict the positioning teeth so that the rotating disc rotates intermittently and the patterns are changed and various patterned images are obtained.
REFERENCES:
patent: 4779176 (1988-10-01), Bornhost
patent: 5113332 (1992-05-01), Richardson
patent: 5934794 (1999-08-01), Hutton
A & J
Adams Russell
Cruz Magda
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