Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Reexamination Certificate
1999-10-07
2001-05-29
Evans, Jefferson (Department: 2652)
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Disk record
Reexamination Certificate
active
06239945
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a recording or playback device for a disk contained in a cartridge.
BACKGROUND OF THE INVENTION
FIG. 3
is a perspective view of a cartridge
60
containing such a disk
6
. The cartridge
60
is provided at a side portion thereof with a shutter
61
for opening the cartridge to expose the disk
6
or alternatively closing the cartridge. A guide groove
62
is formed in the end face of the side portion over the entire length. The upper surface of the cartridge
60
bears an arrow mark
63
indicating the direction of insertion of the cartridge
60
.
FIG. 6
is a perspective view of a conventional disk recording or playback device to show the cartridge
60
in the course of insertion.
FIGS. 7A and 7B
are side elevations of the conventional disk recording or playback device,
FIG. 7A
showing an open position permitting the insertion of the cartridge
60
,
FIG. 7B
showing the cartridge
60
as completely inserted.
FIGS. 8A and 8B
are side elevations of the conventional disk recording or playback device,
FIG. 8A
showing a closed position in which the cartridge
60
is loaded on a chassis
1
,
FIG. 8B
showing the holder
3
to be described below during transition from the closed position to the open position.
A holder
3
for the cartridge
60
to be inserted in has a base end pivoted as at
41
to a pair of support plates
18
,
18
projecting upward from the chassis
1
. The holder
3
has a side wall provided with a kickout member
5
which is slidable in the direction of insertion of the cartridge
60
. With the device of the type described, the cartridge
60
in the holder
3
is urged by the kickout member
5
toward the direction of discharge from the holder
3
during the transition of the holder
3
from the closed position to the open position. The arrangement for this purpose will be described below.
The side wall of the holder
3
shown in
FIG. 6
has a lug
30
projecting into a path of movement of the kickout member
5
. The kickout member
5
is made from a metal sheet by bending and comprises a slide plate
50
fitting in an elongated slit
37
formed in the side wall of the holder
3
. The slide plate
50
has a contact piece
57
extending into the holder
3
and pushable by the cartridge
60
, an engaging piece
58
deformable on deflection by coming into contact with the lug
30
on the holder
3
, and a pusher
59
for pivotally moving the change-over lever
40
to be described below. The kickout member
5
is biased by a spring
54
toward the cartridge discharge direction. When the holder
3
is empty, the engaging piece
58
of the kickout member
5
is positioned toward the cartridge discharge direction beyond the lug
30
(see FIG.
7
A).
The change-over lever
40
is pivoted as at
40
a
to a second support plate
19
projecting upward from the chassis
1
and is movable into the path of movement of the kickout member
5
. The change-over lever
40
is biased clockwise by a torsion spring (not shown) fitted to the pivot portion
40
a
, and restrained from moving clockwise by contact with a projection
19
a
on the second support plate
19
. The pivot portion
40
a
comprises a pin
16
projecting outward from the second support plate
19
and fitting in a hole formed in the change-over lever
40
.
When inserted into the holder
3
in the open position shown in
FIG. 7A
, the cartridge
60
pushes in the kickout member
5
against the spring
54
. The engaging piece
58
advances while being deflected downward by contact with the lug
30
on the holder
3
, restores itself from deflection upon moving out of bearing contact with the lug
30
, and engages with the lug
30
as shown in FIG.
7
B. Thus, the cartridge
60
is completely inserted into the holder
3
.
When the holder
3
is moved down about the pivot portion
41
from the state shown in
FIG. 7B
, the pusher
59
of the kickout member
5
temporarily turns the change-over lever
40
counterclockwise against the action of the torsion spring. Upon the pusher
59
moving out of contact with the change-over lever
40
, the change-over lever
40
returns to its original position as shown in FIG.
8
A. The holder
3
is now in its closed position.
When the holder
3
is pivotally moved upward from the closed position shown in
FIG. 8A
, the pusher
59
comes into contact with the change-over lever
40
. The lever
40
, which is restrained from moving clockwise by the projection
19
a
, presses and elastically deforms the pusher
59
. This disengages the engaging piece
58
from the lug
30
, causing the kickout member
5
to be returned by the force of the spring
54
toward the direction of discharge of the cartridge
60
. The cartridge
60
is discharged by being pushed by the contact piece
57
, and the kickout member
5
returns to the open position shown in FIG.
7
A.
With the conventional device, however, the first support plates
18
provided with the pivot portion
41
for the holder
3
are separate from the second support plate
19
having the change-over lever
40
pivoted thereto as at
40
a
, so that when the device is manufactured in large quantities, variations are likely to occur in the distance between the pivot portion
41
of the holder
3
and the pivot portion
40
a
of the change-over lever
40
. The timing at which the kickout member
5
is disengaged from the lug
30
will then differ from device to device, entailing the drawback of altering the cartridge discharge timing. It is also likely that the timing at which the cartridge
60
is completely inserted into the holder
3
will differ.
SUMMARY OF THE INVENTION
An object of the present invention is to restrict variations in the distance between the pivot portion of the holder
3
and the pivot portion of the change-over lever
40
so as to obviate variations in the timing at which the cartridge is discharged from or completely inserted into the holder
3
.
The present invention provides a disk recording or playback device which comprises a holder
3
supported on a chassis
1
for containing a cartridge
60
and reciprocatingly movable between an open position and a closed position, a kickout mechanism engageabl with the holder
3
, and a change-over lever
40
for releasing the kickout mechanism from engagement with the holder
3
during the transition of the holder
3
from the closed position to the open position.
A pivot portion
41
of the holder
3
and a pivot portion
45
of the change-over lever
40
are provided on a common member on the chassis
1
and each include a pivot projecting from the member. The pivot portions have respective axes L
1
and L
2
which are approximately parallel. More specifically, the pivot portions
41
,
45
are provided on the same surface of the member on the chassis
1
.
This arrangement ensures mass production of brackets
4
which are accurate in the distance between the pivot portions
41
,
45
, that is, which are diminished in variations in this distance, consequently obviating the likelihood that the timing at which the cartridge
60
is discharged from or completely inserted into the holder
3
will vary from device to device.
REFERENCES:
patent: 5485329 (1996-01-01), Lee
patent: 5502704 (1996-03-01), Ohmori
patent: 5610890 (1997-03-01), Eum et al.
patent: 5699210 (1997-12-01), Thompson et al.
patent: 5808831 (1998-09-01), Tanaka
patent: 6118618 (2000-09-01), Kumakura
patent: 0 554 065 (1993-08-01), None
patent: 0 644 540 (1995-03-01), None
patent: 9-128856 (1997-05-01), None
patent: 0 592 192 (1994-04-01), None
patent: WO 97 47005 (1997-12-01), None
Inoue Tadashi
Mori Toru
Nakao Ko ichi
Armstrong Westerman Hattori McLeland & Naughton LLP
Evans Jefferson
Sanyo Electric Co,. Ltd.
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