Dynamic optical information storage or retrieval – Dynamic mechanism optical subsystem – Optical storage medium support
Reexamination Certificate
2002-09-18
2004-11-30
Watko, Julie Anne (Department: 2652)
Dynamic optical information storage or retrieval
Dynamic mechanism optical subsystem
Optical storage medium support
Reexamination Certificate
active
06826770
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to a disk driving device, and more particularly to a disk device in which a movable frame equipped with a turn table is adapted to be vertically swung between a clamping position of a disk placed on the turn table and a clamping releasing position by a vertical swinging operation of a driving arm of the movable arm.
FIGS. 5 and 6
are views for explaining the operation of a disk driving device. Referring to these figures, an explanation will be given of a basic structure and operation of the disk driving device of the kind described above.
In
FIGS. 5 and 6
, reference numeral
1
denotes a movable frame. Its attaching portion
2
at the rear end is attached to a supporting portion
3
provided in a cabinet (not shown). The turn table
1
is provided with a turn table
4
on which a disk (not shown) is placed. The movable frame
1
is provided with a driving arm
5
on the lower side. The driving arm
5
is provided with a supporting shaft
6
on the rear end. The supporting shaft
6
is supported by a bearing (described later) attached to the above cabinet. The driving arm
5
is provided with a protrusion
7
on the front end. The protrusion
7
is opposite to and slidably engaged with a cam face of a cam member
8
in a width direction. The cam member is slid in the width direction. Incidentally, reference symbol
9
a
is a protrusion provided to an intermediate portion of the driving arm
5
and reference symbol
9
b
is a stopper for limiting the vertical movement of the driving arm
5
in engagement with the protrusion
9
a.
In the disk device having a structure explained with reference to
FIGS. 5 and 6
, as seen from
FIG. 6
, when the cam member
8
raises the driving arm
5
via the protrusion
7
around the supporting shaft
6
, the movable frame
1
is swung upwards to take a horizontal posture at a fulcrum of a attaching position a of the attaching portion
2
. By this operation, the disk (not shown) placed on the turn table
4
is clamped by cooperation of a receiving tool (not shown) and the turn table
4
so that it is integrated to the turn table
4
. The raised position of the movable frame
1
when the disk is integrated to the turn table
4
refers to a clamping position. In a state where the movable frame
1
is located at the clamping position, recording or reproducing for the disk is performed. On the other hand, as seen from
FIG. 6
, when the cam member
8
moves downward the driving arm
5
at a fulcrum of the driving arm
5
through the protrusion
7
, the movable frame
1
is swung downward to take a forward-falling posture at a fulcrum of the above attaching position a. By this operation, the integrated state of the disk placed on the turn table
4
and the turn table
4
is released. The lowered position of the movable frame
1
when the integrated state of the disk and turn table
4
has been released is a clamping releasing position of the movable
1
. When the movable frame
1
is located at the clamping releasing position, mounting/dismounting for the disk is made for the turn table
4
.
FIG. 7
is an exploded perspective view of the supporting shaft
6
of the driving arm
5
and the bearing
20
provided on the cabinet
10
, viewed from below and askew, which were adopted in a conventional disk device.
FIG. 8
is a schematic bottom view of a driving arm
5
built in the cabinet
10
viewed from an arrow of Y direction in
FIG. 5
(below the disk device).
FIG. 9
is an enlarged view in IX portion in FIG.
8
.
FIG. 10
is a sectional view taken in line X—X in FIG.
9
.
As seen from
FIG. 8
, the driving arm
5
is formed in a
-shape. The driving arm
5
is provided with the above supporting shafts
6
,
6
on both right and left sides of the rear end, which are coaxial and project outwardly. The pair of bearings
20
,
20
having the same structure are provided symmetrically on the left and right inner walls
10
a
of the bearing
10
. Each bearing
20
enjoys a measure for swingably rotating the supporting shaft
6
(supporting-shaft supporting measure), a measure for attaching the driving arm
5
to the cabinet
10
through the supporting shaft
6
(assembling capability improving measure) and a measure for preventing the supporting shaft
6
from easily coming off from the bearing
20
even when the driving arm
5
or cabinet
10
bend by shock of e.g. falling. A detailed explanation will be given of these measures and actions obtained by these measures.
(Supporting Shaft Supporting Measure and Action thereof)
As seen from
FIGS. 7
,
9
and
10
, the bearing
20
has a receiving surface for slidably receiving the outer surface
61
of the supporting shaft
6
. The receiving surface is divided into four divided receiving surfaces
21
,
22
,
23
and
24
. The first divided receiving surface
21
is constituted by the lower end face in a width direction of a beam
27
of a gate
25
which includes a pair of legs
26
,
26
inwardly protruded from the cabinet
10
and the beam
27
extending between the upper ends of the legs
26
,
26
. The second receiving surface
22
is formed in a shape orthogonal to the first divided receiving surface by extending the inner face of a wall
28
formed by extending downward the one side leg
26
of the gate
25
, i.e. the inner face of the leg
26
. The third divided receiving surface
23
is oppositely provided apart from and in parallel to the second divided receiving surface
22
. This third divided receiving surface
23
is formed by the side of a swelling convex piece
29
which is protruded inwardly from the cabinet. The fourth divided receiving surface
24
extends in parallel to the first divided receiving surface in a direction going from the second divided receiving surface to the third divided receiving surface. The fourth divided receiving surface
24
is formed by the upper face of a projecting piece
31
which projects sideways from the lower end of the wall
28
.
In a state where the supporting shaft
6
is attached to the bearing
20
, as seen from
FIG. 10
, the outer surface of the supporting shaft
6
is slidably received at four points every 90 degrees by the receiving surfaces which are a set of the first to fourth divided receiving surfaces
21
to
25
of the bearing
20
. Therefore, the supporting shaft is rotatable at a fixed point in such a manner that it slides on the receiving surfaces which are a set of the first to fourth divided receiving surfaces of the bearing
20
.
(Measure for Improving Assembling Capability and Action thereof)
The convex piece
29
having the above third divided receiving surface has a sloping guide surface
30
which connects the inner wall
10
a
of the cabinet
10
to the terminal edge
23
a
of the third divided receiving surface
23
located at the apex of the convex piece
29
. Further, the first, second and fourth divided receiving surfaces
21
,
22
and
24
have segments located more inward (indicated by arrow I in
FIG. 9
) of the cabinet
10
than the apex
29
a
of the convex piece
29
. Further, a space S between the pair of legs
26
of the gate
25
is formed by an extracting trace of a mold. The entire convex piece
30
and the entire fourth divided receiving surface
24
overlook the space S in a direction of extracting the mold (indicated by arrow B in FIGS.
7
and
10
). The first divided receiving surface
21
is formed longer than the fourth divided receiving surface
2
.
4
.
In such a structure, the left and right supporting shafts
6
,
6
of the driving arm
5
each is caused to overlook the convex piece
29
from behind of each the left and right bearings
20
,
20
on the side of the cabinet
10
. Thereafter, the supporting shafts
6
,
6
are shifted forward as indicated by arrow C in FIG.
8
. The left and right supporting shafts
6
,
6
each slides to climb over the sloping guide surface
30
of the convex piece
29
and fit in the space encircled by the first to fourth divided receiving surfaces
21
to
24
and supported by the bearings
20
. Thus, the driving ar
Funai Electric Co. Ltd.
Morgan & Lewis & Bockius, LLP
Watko Julie Anne
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