Dynamic information storage or retrieval – Dynamic mechanism subsystem – Specified detail of transducer assembly support structure
Reexamination Certificate
2002-01-03
2002-12-10
Davis, David (Department: 2652)
Dynamic information storage or retrieval
Dynamic mechanism subsystem
Specified detail of transducer assembly support structure
C369S044210
Reexamination Certificate
active
06493309
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a pickup adjusting mechanism for a disc player, which is enabled to adjust the tilt angle of the pickup capable of laterally moving in an opening portion provided inside a chassis of a disc player.
2. Description of the Related Art
Hitherto, there has been a conventional adjusting mechanism for adjusting such a tilt angle, which is, for example, an optical head described in JP-A-8-171726.
As illustrated in
FIGS. 2A
,
2
B, and
3
, this optical head is equipped in an optical information recording/reproducing apparatus for optically recording information on, reproducing information from, or deleting information from an information recording medium surface. The optical head has an optical pickup actuator
109
, and a carriage
110
for carrying the actuator
109
. Further, a tapered surface
101
is provided on one of the actuator
109
and the carriage
110
. A spherical portion
102
to be brought into sliding contact with the tapered surface
101
is provided in the other of the actuator
109
and the carriage
110
. Thus, the optical head is adapted to adjust the inclination of the actuator
109
by putting the tapered surface
101
and the spherical portion
102
into sliding contact with each other. In this optical head, an adhesive agent
111
is applied onto the tapered surface
101
or the spherical portion
102
. Thereafter, the inclination adjustment is performed by attaching the tapered surface
101
and the spherical portion
102
to each other. After the inclination adjustment, the actuator
109
is fixed to the carriage
110
by hardening the adhesive agent.
However, in this optical head, the tapered surface
101
and the spherical portion
102
are fastened to each other, because the adhesive agent hardens after the inclination adjustment thereof. Thus, this conventional optical head has a drawback in that the inclination adjustment cannot be performed after the tapered surface
101
and the spherical portion
102
are fastened to each other. Moreover, this conventional optical head is configured so that the angle of the carriage
110
with respect to a rail
113
cannot be adjusted.
Further, JP-A-59-125730U describes a pickup adjusting mechanism for a disc player.
As illustrated in
FIGS. 4 and 5
, the disc player comprises a support device for rotating and driving a disc
204
, a pickup
214
a
opposed to an information recording surface of the disc
204
at a predetermined distance, and a carriage
210
for supporting this pickup
214
a
and for moving the pickup
214
a
along the disc
204
. In this disc player, a fulcrum screw
215
is attached to the carriage
210
in such a way as to be able to go up and down. A portion of the support member
213
for supporting the pickup
214
a
, which is provided right under the pickup, is supported at a tip end of this fulcrum screw
215
. Adjusting screws
219
a
and
219
b
, which are positioned at a predetermined distance from the fulcrum screw
215
, and other adjusting screws
221
a
and
221
b
positioned at a predetermined distance from the fulcrum screw
215
in a direction nearly perpendicular to a direction, in which the screws
219
a
and
219
b
are placed, are inserted into the carriage
210
. All the tip ends of the adjusting screws
219
a
,
219
b
,
221
a
, and
221
b
are screwed into the support member
213
.
However, this conventional mechanism has a drawback in that friction caused by the adjusting screws
219
a
,
219
b
,
221
a
, and
221
b
themselves is not taken into account at all.
Further, JP-A-61-149112U describes a conventional apparatus for adjusting an optical axis of a pickup in a CD player.
As shown in
FIGS. 6A and 6B
, a first chassis
305
, to which pickup guide shafts
303
a
and
303
b
are attached, and a second chassis
310
, to which a turntable
306
is attached in such a way as to be parallel with the first chassis
305
, are provided in a CD player that needs the adjustment of inclination of an optical axis of a pickup
301
. The first chassis
305
is inclined to the second chassis
310
by turning the first chassis
305
around the pickup guide shaft
303
a
or
303
b
serving as a fulcrum.
However, this conventional apparatus has a drawback in that the adjusting portion is not in contact with the chassis
305
and
310
.
SUMMARY OF THE INVENTION
An object of the invention is to solve the drawbacks of the conventional apparatus, and to provide a pickup adjusting mechanism for a disc player, which enables a pickup to bring a secondary-shaft-side part into point contact with a chassis. The pickup has a tilt angle which is adjusted. The secondary shaft side part is opposed to a main-shaft-side part. As a result, the secondary-shaft-side part can laterally move, that reliability in holding the secondary-shaft-side part can be enhanced, and that the lateral movement of the pickup with respect to the chassis can be stably performed.
The invention is proposed to solve the aforementioned drawbacks. According to an aspect of the invention, there is provided a pickup adjusting mechanism (hereunder referred to as a first pickup adjusting mechanism of the invention) for a disc player, which comprises an inclined piece portion tilted frontwardly and obliquely downwardly in an opening portion inside a drive chassis and provided at a side opposite to a main shaft in a pickup adapted to laterally move by being guided at one side thereof by the main shaft, a screw for adjusting a tilt angle of the pickup, which is obliquely upwardly or downwardly screwed into the inclined piece portion so that a lower part thereof is placed at an inner part of the pickup, a flange-like holding portion that is provided in such a way as to be integral with the lower part of this screw and that has a sidewise-H-like section in a plan view thereof, and that is fitted to the opposite opening edge, so that the bottom surface edge of an upper flange portion abuts against a part of the top surface of the drive chassis, which is in the vicinity of the opening edge, and so that the bottom surface edge of this screw laterally moves by sliding along and being in contact with the part of the top surface, which is in the proximity of the opening edge, when the pickup laterally moves. In this mechanism, at least the bottom surface side portion of the peripheral edge of the upper flange-like portion of the flange-like holding portion is chamfered, so that an inner edge part of this chamfered portion laterally moves by sliding along and being in contact with the top surface placed in the vicinity of the opening edge. Moreover, the mounting angle &thgr; of the screw screwed into the pickup with respect to the drive chassis is set in such a way as to be larger than an adjusting amount of the tilt angle of the pickup.
According to another aspect of the invention, there is provided a pickup adjusting mechanism (hereunder referred to as a second pickup adjusting mechanism of the invention) for a disc player, which comprises an inclined piece portion tilted frontwardly and obliquely downwardly in an opening portion inside a drive chassis and provided at a side opposite to a main shaft in a pickup adapted to laterally move by being guided at one side thereof by the main shaft, a screw for adjusting a tilt angle of the pickup, which is obliquely upwardly or downwardly screwed into the inclined piece portion so that a lower part thereof is placed at an inner part of the pickup, a flange-like holding portion that is provided in such a way as to be integral with the lower part of this screw and that has a sidewise-H-like section in a plan view thereof, and that is fitted to the opposite opening edge, so that the bottom surface edge of an upper flange portion abuts against a part of the top surface of the drive chassis, which is in the vicinity of the opening edge, and so that the bottom surface edge of this screw laterally moves by sliding along and being in contact with the part of the top surface, which is in the proximity of the opening edge, w
Sogawa Teruaki
Tanabe Noritaka
Davis David
Dolan Jennifer M
Funai Electric Co. Ltd.
Morgan & Lewis & Bockius, LLP
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