Adjustable positioning device for an optical pickup of an...

Details Adjustable positioning device for an optical pickup of an... Adjustable positioning device for an optical pickup of an...

2002-04-10

2004-09-21

Miller, Brian E. (Department: 2651)

Dynamic optical information storage or retrieval

Dynamic mechanism optical subsystem

Transducer carriage or actuator

Reexamination Certificate

active

06795971

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an optical disc apparatus, and more particularly to an adjustable positioning device for an optical pickup of an optical disc apparatus.
2. Description of Related Art
An optical pickup generally located in an optical disc apparatus is used to read data stored on an optical disc or to store data onto an optical disc. Referring to FIG.
1
and
FIG. 2
, a base
10
of a general optical disc apparatus is provided with three adjustable bar holders
20
and one stationary bar holder
21
; an optical pickup
11
, installed on an optical pickup head
12
which has both lateral ends respectively sleeved on a sliding bar
13
so that the optical pickup head
12
is movable back and forth on the sliding bar
13
, to read data from or store data to the optical disc positioned above. Both ends of one sliding bar
13
are respectively connected to the stationary bar holder
21
and the opposite adjustable bar holder
20
, and both ends of the other sliding bar
13
are respectively connected to two relative adjustable bar holders
20
. The adjustable bar holder
20
, shown in
FIG. 2
, comprises a top plate
22
, a lower base seat
23
and a spring
24
. The lower base seat
23
is provided with a receiving chamber
231
in which the spring
24
is installed and the sliding bar
13
is inserted. The top plate
22
and the lower base seat
23
are respectively fastened at lateral ends thereof to the base
10
with a fixing screw
25
. An adjustable screw
26
connects the top plate
22
and the lower base seat
23
together and extends into the chamber
231
of the lower base seat
23
to push against the sliding bar
13
to adjust a height of the sliding bar
13
. A turning table
14
shown as
FIG. 1
is connected on the base
10
to spin an optical disc rotated. Both parallelism of the optical pickup
11
and height of the optical pickup
11
relative to the turning table
14
are adjustable when the height of each sliding bar
13
is adjusted by adjusting the adjustable screw
26
inside the three adjustable bar holders
20
.
It is difficult to assemble the spring
24
with the adjustable bar holder
20
, because the spring
24
is a tiny and small part that must be positioned within the receiving chamber
231
of the adjustable bar holder
20
.
SUMMARY OF THE INVENTION
The invention provides an adjustable positioning device for an optical pickup of an optical disc apparatus with less working parts to reduce cost of manufacture and to make assembly easier.


REFERENCES:
patent: 5615204 (1997-03-01), Watanabe et al.
patent: 5761183 (1998-06-01), Ikegame
patent: 5963535 (1999-10-01), Yamakawa et al.
patent: 5995478 (1999-11-01), Park
patent: 6285649 (2001-09-01), Bessho et al.
patent: 6366551 (2002-04-01), Wu
patent: 6385160 (2002-05-01), Jeon
patent: 6445673 (2002-09-01), Park
patent: 6512734 (2003-01-01), Chang et al.
patent: 6636473 (2003-10-01), Kagaya et al.
patent: 6639891 (2003-10-01), Katagiri
patent: 6667945 (2003-12-01), Omori

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