Dynamic information storage or retrieval – With particular cabinet structure – Slotted for edgewise insertion of storage disc
Reexamination Certificate
2000-08-16
2003-05-20
Ometz, David L. (Department: 2653)
Dynamic information storage or retrieval
With particular cabinet structure
Slotted for edgewise insertion of storage disc
C369S219100
Reexamination Certificate
active
06567362
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to an optical disk device in which an optical disk is loaded to perform either a recording operation or a reproducing operation.
2. Description of the Related Art
In an optical disk device, an optical disk is loaded and a laser beam is incident to an information recording surface of the optical disk to record information at the information recording surface or reproduce the recorded information.
FIG. 6
is a perspective view for showing a prior art optical disk device. The optical disk device
100
is mainly comprised of a substantial rectangular-shaped chassis
101
formed by a sheet metal and having partially a recess at its outer edge; a spindle motor
103
arranged on the chassis
101
and having a turntable
102
coaxially attached thereto; guide shafts
104
,
105
arranged in parallel to each other; an optical pickup
106
having an objective lens
106
a
arranged between.the guide shafts
104
,
105
and having a substantial rectangular outer shape; and a feeder mechanism to be described later for use in feeding the optical pickup
106
in a longitudinal direction of the guide shafts
104
,
105
.
Then, a constitution of the optical disk device
100
will be described in detail as follows.
At first, the central part of the chassis
101
is formed with a substantial rectangular-shaped hole
101
a
. Then, the spindle motor
103
is attached and fixed to the surface of the chassis
101
at one edge of the chassis
101
in a longitudinal, direction at the hole
101
a
. In addition, at both sides of the hole
101
a
in a lateral direction of the chassis
101
are arranged the guide shafts
104
,
105
in such a way that they are in parallel to each other in the longitudinal direction and in parallel with the disk installing surface
102
a
of the turntable
102
. One end of the guide shaft
104
at the side of the turntable
102
(hereinafter merely called as one end of the guide shaft
104
) is positioned in a longitudinal direction and radial direction by the position setting pieces
101
b
and
101
c
formed while a part of the chassis
101
is protruded and bent, and one end of the guide shaft is attached and fixed to the chassis
101
with a screw
107
. In addition, the other end of the guide shaft
104
(hereinafter similarly called as the other end of the guide shaft
104
) is also similarly positioned by the position setting piece
101
d
, biased resiliently toward the surface of the chassis
101
by a leaf spring
108
fixed to the chassis
101
with a screw
111
and supported there. In turn, each of both ends of the guide shaft
105
is also similarly positioned by position setting pieces
101
e
,
101
f
and
101
g
,
101
h
and at the same time resiliently biased toward the surface of the chassis
101
by leaf springs
109
,
110
fixed with screws
112
,
113
and supported there.
Further, the guide shaft
104
is inserted into round holes.
106
e
,
106
f
formed at each of bent pieces
106
c
,
106
d
arranged at one end of the optical pickup
106
in its longitudinal direction, and a cutout groove
106
h
formed at the bent piece
106
g
arranged at the other end opposite to the round holes
106
e
,
106
f
is slidably supported at the guide shaft
105
, thereby the optical pickup
106
is movably guided in a longitudinal direction (the radial direction of the optical disk) of the guide shafts,
104
,
105
and further guided in such a way that a distance between the optical pickup
106
and the objective lens
106
a
and a distance between the objective lens
106
a
of the optical pickup
106
and the surface of the optical disk (not shown) is always kept at an approximate same distance.
Further, an attitude of the optical pickup
106
can be changed by a method wherein, in order to cause an optical axis of the objective lens
106
a
of the optical pickup
106
is faced to cross at a right angle with the information recording surface of the optical disk, the other end of the guide shaft
104
is moved in a direction H
1
substantially crossing at a right angle with the surface of the chassis
101
and each of both ends of the guide shaft
105
is moved in the directions H
2
, H
3
to adjust the guide shafts
104
,
105
to be inclined against the surface of the chassis
101
. A method for adjusting the guide shafts
104
,
105
will be described later.
A nut member
114
is integrally fixed to the optical pickup
106
at one end of the bent pieces
106
c
,
106
d
of the pickup
106
, and a nut part
114
a
of the nut member
114
is resiliently biased; and engaged with a valley of thread at a lead screw
115
which is substantially in parallel with the guide shaft
104
and rotatably arranged. In turn, a spur gear
116
is coaxially fixed to an end part of the lead screw
115
opposite to the turntable
102
in such a way that the spur gear is integrally rotated with the lead screw, and a spur gear
117
engaged with the spur gear
116
is fixed to a rotating shaft of a feeder motor
118
. Then, this feeder motor
118
is rotationally driven to cause the lead screw
115
to be rotated under a gear ratio determined by the spur gear
116
and the spur gear
117
, and then the optical pickup
106
having the nut member
114
fixed thereto is fed in a radial direction of the optical disk.
In addition, the optical disk is installed on the disk mounting surface
102
a
of the turntable
102
, rotated by the spindle motor
103
, a laser beam radiated from the objective lens
106
a
of the optical pickup
106
is condensed at the information recording surface of the optical disk, the return beam reflected from the information recording surface in response to information is received within the optical pickup
106
through the objective lens
106
a
again, thereby it is possible to read information in the information recording surface of the optical disk or record information onto the information recording surface. Further, the optical pickup,
106
performs a controlled motion in accordance with the information recording surface of the optical disk by the feeder motor
118
along the longitudinal directions of the guide shafts
104
,
105
.
Referring now to
FIG. 7
, a method for adjusting an inclination of each of the guide shafts
104
,
105
will be described.
FIG. 7
shows a sectional view taken along line
7
—
7
of FIG.
6
.
As shown in this figure, the chassis
101
is formed with a downward protruded indentation
101
i
at the position of the other end of the guide shaft
105
biased by the leaf spring
110
. Then, an adjustment screw
119
is rotatably arranged below an abutment surface of the leaf spring
110
against the guide shaft
105
and at the central part of the indentation
101
i
in such a way that it may be protruded from below the chassis
101
in an upward direction. Then, the other end of the guide shaft
105
is mounted on the extremity end surface
119
a
of the adjustment screw
119
arranged at a predetermined height and a pressing surface
110
a
of the leaf spring
110
pushes against the surface of the guide shaft
105
in a slant direction under a state in which the right side of the guide shaft
105
as viewed in the figure is abutted against an abutting surface
101
h
′ of the position setting piece
101
h
(refer to FIG.
6
), thereby the other end of the guide shaft
105
is resiliently biased by the screw extremity end surface
119
a
and the abutting surface
101
h
′ and supported there.
With such an arrangement as above, the adjustment screw
119
is rotated to cause the other end of the guide shaft
105
to be moved in a direction H
3
as shown in the figure, i.e. if the adjustment screw
119
is rotated in a clockwise direction, the other end of the guide shaft
105
can be adjusted in an upward, direction H
3
′ and if the adjustment screw
119
is rotated in a counter-clockwise direction, the other end of the guide shaft
105
can be adjusted in a downward direction H
3
′.
The constitution shown in
FIG. 7
is similarly
Asano Takahiro
Kagaya Hiroyuki
Alps Electric Co. ,Ltd.
Ometz David L.
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