Recording or playback device for disk contained in cartridge

Details Recording or playback device for disk contained in cartridge Recording or playback device for disk contained in cartridge

1999-09-23

2001-10-23

Ometz, David L. (Department: 2652)

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Having power driven transducer assembly

Reexamination Certificate

active

06307829

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
Recording or playback devices have already been proposed for use with cartridges
60
containing a disk
6
(see FIG.
1
).
FIG. 4
is a plan view of a mechanism deck of such a disk recording or playback device. A turntable and a pickup
2
are provided on the lower side of a chassis
1
, projecting upward beyond the chassis
1
through an opening
10
formed in the chassis
1
. The pickup
2
is supported movably toward and away from the turntable
5
by a guide rod
11
extending across the opening
10
.
A drive mechanism
4
for moving the pickup
2
is mounted on the chassis
1
at one side of the turntable
5
.
FIG. 5
is a perspective view of the drive mechanism
4
. The drive mechanism
4
has a bracket
3
including three vertical plates
35
,
35
a,
35
b
in parallel to one another, and comprises a screw rod
40
, a reduction gear
42
and a motor M
1
which are mounted on the bracket
3
. The bracket
3
is made from a synthetic resin by injection molding.
The motor M
1
carrying a gear
41
at its forward end is fitted to the vertical plate
35
b
at right. The gear
41
is coupled to the reduction gear
42
which is mounted on the middle vertical plate
35
a.
The screw rod
40
extends between and is supported by the vertical plate
35
at left and the middle vertical plate
35
a.
An intermediate gear
43
fitted to one end of the screw rod
40
is in mesh with the reduction gear
42
.
As shown in
FIG. 4
, the bracket
4
is attached to the rear side of the chassis
1
, with the screw rod
40
in parallel to the guide rod
11
. The screw rod
40
is in screw-thread engagement with the pickup
2
. The rotation of the motor M
1
is transmitted through the reduction gear
42
and the intermediate gear
43
to the screw rod
40
, rotating the screw rod
40
and thereby moving the pickup along the guide rod
11
.
The chassis
1
is provided at a corner with a support member
8
for receiving the cartridge
60
at its bottom. The support member
8
, which is made of metal, is mounted on the chassis
1
by crimping. The support member
8
is a stepped rod, and a peripheral edge portion of the cartridge
60
defining a fitting cavity
62
formed in the bottom surface of the cartridge bears on the upper face of stepped portion
80
of the support member
8
as shown in FIG.
3
.
With the conventional device, however, the support member
8
and the bracket
3
are separate parts and are attached to the chassis
1
individually. In view of the fact that the support member
8
is positioned in the vicinity of the bracket
3
, the present applicant has conceived the idea of providing the support member
8
on the bracket
3
integrally therewith to reduce the number of components.
SUMMARY OF THE INVENTION
An object of the present invention is to reduce the number of components of a mechanism deck for use in disk recording or playback devices.
The present invention provides a disk recording or playback device which comprises as mounted on a chassis
1
a support member
8
for receiving a cartridge
60
containing a disk, a pickup
2
movable along a signal recording surface of the disk, and a drive mechanism
4
for moving the pickup
2
, the drive mechanism
4
being accommodated in a bracket
3
provided on the chassis
1
.
The bracket
3
is removably attached to the chassis
1
, and the support member
8
is formed integrally with the bracket
3
and projects outward beyond the chassis
1
.
Since the support member
8
is formed integrally with the bracket
3
, the device of the invention is smaller in the number of components than the conventional device wherein the bracket
3
and the support member
8
are provided separately. This reduces the number of steps for assembling the device to result in an improved work efficiency.


REFERENCES:
patent: 5623372 (1997-04-01), Matsui
patent: 9-128856 (1997-05-01), None
patent: 411185411A (1999-07-01), None

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