Dynamic information storage or retrieval – Dynamic mechanism subsystem – Having power driven transducer assembly
Reexamination Certificate
2001-01-03
2004-05-25
Letscher, George J. (Department: 2653)
Dynamic information storage or retrieval
Dynamic mechanism subsystem
Having power driven transducer assembly
Reexamination Certificate
active
06741542
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a disk device capable of loading different type of information recording media, such as a CD (compact disk) used as a single disk and an MD (minidisk) used in cartridge stored form, on a turntable at different times and thereafter ejecting such media from the turntable.
2. Description of the Related Art
FIG. 1
is a schematic view of a conventional disk device. In the figure, reference numeral
1
denotes a disk device used in common with an MD and a CD,
10
is a chassis,
12
is a spindle motor,
13
is a turntable,
14
is an optical pickup, and
15
is a movable body provided with the optical pickup
14
.
16
is a motor for displacing the movable body
15
,
17
is a feed screw. The feed screw
17
is rotated by the motor
16
and engages with the engaging member (not shown) which is provided on the movable body
15
. The movable body
15
displaces in a linear manner along the feed screw
17
by the rotation of the feed screw
17
.
18
is a guide shaft which guides the linear displacement of the movable body
15
along the feed screw
17
.
19
is a motor which acts as a drive source for the refuge operation of a CD clamp and a CD adapter (not shown), for the loading operation of a CD onto the turntable by the CD clamp and the CD adapter, and for the retracting operation of an MD holder (not shown) into the device.
20
is a clutch which switches the transmission route of the rotational force of the motor
19
. The clutch
20
enables the motor
19
to be used as a drive source for the CD clamp and CD adapter refuge operation and for the retracting operation of the MD holder into the device. Furthermore, the clutch
20
enables the motor
19
to be used as a drive source for the loading operation of the CD onto the turntable due to the CD adapter and the CD clamp. Thus, a single motor
19
can be used in common as a drive source for respective operations. Furthermore, the switching of the clutch
20
is performed by an electrical or mechanical clutch switching means which is provided separately to switch the clutch.
21
is an arm for lowering an MD (not shown), which is housed in the MD holder and drawn into the device, onto the turntable
13
after completion of the refuge operation of the CD adapter and the CD clamp.
22
is a feed roller for carrying a CD inserted from the CD and MD insertion mouth (not shown) into the device.
23
is an arm support member which pivotably supports the base of the CD adapter arm on the tip of which the CD adapter is arranged and the base of the CD clamp arm on the tip of which the CD clamp is arranged.
31
is a switch for detecting an inner peripheral position of an MD.
Next, the operation of the conventional disk device will be explained.
When an MD is inserted from the CD and MD insertion mouth (not shown), the inserted MD is drawn into the device and set on the turntable
13
. At this time, the CD adapter and the CD clamp do not impede the MD in a set position. For example, these components are refuged in a predetermined position into the device.
On the other hand, when a CD is inserted from the CD and MD insertion mouth, the inserted CD is conveyed into the device by the feed roller
22
, its rotational center is gripped by the CD adapter and the CD clamp and it is placed on the turntable
13
in that state.
When the inserted recording medium disk is a CD, the inserted CD is rotated by the turntable
13
and information is read out by an optical pickup
14
, which displaces in an outer peripheral direction of the CD by the displacement of the movable body
15
.
On the other hand, when the inserted recording medium disk is an MD, an aperture formed in the case of the inserted MD is opened, the recording medium disk in the case is rotated by the turntable
13
and information is read out through the aperture by the optical pickup
14
, which is displaced in an outer peripheral direction of the MD by the displacement of the movable body
15
.
The disk inner peripheral position in which the movable body
15
, provided with an optical pickup
14
, is displaced in case of playing a CD is different from that in case of an MD. Thus, it is necessary to separately provide a CD inner peripheral position defining switch which defines a disk inner peripheral position in which the movable body
15
is displaced when playing the CD and an MD inner peripheral position defining switch which defines a disk inner peripheral position in which the movable body
15
is displaced when playing the MD.
Since the conventional disk device is constructed as above, the number of components and the complexity of the design are increased due to the necessity of providing the CD inner peripheral position defining switch and the MD inner peripheral position defining switch in a predetermined position depending on the inner peripheral position of the CD or MD.
SUMMARY OF THE INVENTION
The present invention is proposed to solve the above problem and has the object of providing a disk device with a reduced number of components and with a simplified and more compact structure, which can be used with a non case-stored information recording medium disk such as a CD which is used singly and with a case-stored information recording medium disk such as an MD which is used in a cartridge stored form.
According to the present invention, a disk device is provided with a disk inner peripheral position detection means for detecting the motion of an optical pickup to a disk inner peripheral position of a case-stored recording medium disk or a disk inner peripheral position of a non case-stored recording medium disk. The disk inner peripheral position detection means is also used to detect the disk inner peripheral position of the case-stored recording medium disk and the non case-stored recording medium disk.
By such an arrangement, it is not necessary to separately provide a detection means for the detection of the disk inner peripheral position of the case-stored recording medium disk and the non case-stored recording medium disk. Thus, a disk device for use with both the case-stored recording medium disk and the non case-stored recording medium disk can be realized in a compact size with a simplified structure and with a reduced number of parts.
The disk device according to the present invention may be provided with a detection means for detecting the displacement of the optical pickup to the inner peripheral position of the disk thereby switching its internal state, while detecting the inner peripheral position of the case-stored recording medium disk and the non case-stored recording medium disk. In this case, the device is adapted to detect displacement of the optical pickup to the inner peripheral position of the case-stored recording medium disk or the non case-stored recording medium disk based on the detection result of the detection means and the direction of displacement of the carriage.
By such an arrangement, it is not necessary to separately provide a detection means for the detection of the disk inner peripheral position of the case-stored recording medium disk and a detection means for the detection of the disk inner peripheral position of the non case-stored recording medium disk. Thus, a disk device for use with both the case-stored recording medium disk and the non case-stored recording medium disk can be realized in a compact size with a simplified structure and with a reduced number of parts. Furthermore, the disk inner peripheral position detection means detects the displacement of the optical pickup to the inner peripheral position of the case-stored recording medium disk or the non case-stored recording medium disk based on the direction of displacement of the carriage and the detection result of the detection means which can detect the inner peripheral position of the case-stored recording medium disk and the non case-stored recording medium disk. Thus, it is possible to realize a disk device in a compact size with a simplified structure and a reduced number of parts,
Birch & Stewart Kolasch & Birch, LLP
Letscher George J.
Magee G R
Mitsubishi Denki & Kabushiki Kaisha
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