JPH05258551A - Optical information recording/reproducing device - Google Patents

Abstract

PURPOSE:To effectively cool the inside of a housing even at a compact optical information recording/reproducing device. CONSTITUTION:A spindle motor 3 for rotating a disk 2 and an access mechanism 5 for moving an optical head 4 are provided in a housing 1. An accessing signal is given to the optical head 4 from a controller. In the vicinity of the spindle motor 3, a rotative body 10 having a fan 11 is provided rotatably. The rotative movement of the spindle motor 3 is transmitted to the rotative body 10 by a movable pulley 12. Then, when the accessing signal is given to the optical head 4 from the controller, the movable pulley is retreated by a plunger 13, the transmission of the rotative movement is stopped and when no accessing signal is given to the optical head 4, the movable pulley 12 is moved forward by the plunger 13, the rotative movement is transmitted to the rotative body 10 and the fan 11 is rotated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical information recording device such as an optical disk device having a cooling mechanism.

[0002]

2. Description of the Related Art An optical information recording apparatus equipped with an optical disk comprises a spindle motor for rotating the disk, an optical head for reproducing and recording signals from the disk, An access mechanism for moving the optical head to a predetermined position on the disk is provided. In addition, the device, the rotation of the motor,
A control circuit that controls the operation of the access mechanism, etc.
A signal processing circuit for processing the recording signal is also provided. The motor, the optical head, the access mechanism, the control circuit and the signal processing circuit are arranged in the housing,
Recording and reproduction of information on the disc are performed while the optical disc is rotated at a high speed by a spindle motor.

When such an apparatus is driven, the control circuit and the signal processing circuit generate heat by themselves, the motor heats by the rotation, and the linear motor heats by the access. Therefore, heat is accumulated in the housing and the temperature rises. The temperature inside the housing is the guaranteed temperature of the optical disk drive, for example, 25 ± 2.
If the temperature exceeds 0 ° C., the focusing servo and the tracking servo may not be properly performed.

In order to solve such a problem, conventionally, an air blower composed of a fan and a motor is attached to an intake port formed in a housing. This blower normally sucks and exhausts the gas in the housing and discharges and exhausts the gas to cool the inside of the housing.

However, since the optical head, the access mechanism, etc. are arranged in the housing, the cooling efficiency in the housing is small. Especially when the optical disk drive is made compact, the inside of the housing cannot be cooled efficiently. In addition, electric power is required to rotate the motor of the blower, which consumes a large amount of electric energy.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an optical information recording / reproducing apparatus which can efficiently cool the inside of the housing even if it is small in size and is energy efficient.

[0007]

In order to achieve the above object, the present inventor has noticed that the spindle motor is rotating even when the access signal from the controller is not given to the optical head, The present invention has been completed as a result of extensive studies to effectively utilize the rotational movement of the spindle motor.

That is, the present invention comprises a rotation driving means for rotating the disk in the housing, an optical head for recording / reproducing a signal on / from the disk, and a controller for giving an access signal to the optical head. Which is rotatably arranged in the housing and has blades, transmission means for transmitting the rotational movement by the rotation drive means to the rotation body, and an access signal from the controller. In response, there is provided an optical information recording / reproducing apparatus comprising: clutch means for stopping transmission of rotational motion from the rotary driving means to the rotating body.

[0009]

In the device having the above-mentioned structure, the transmission means allows
The rotary motion of the rotary drive means can be transmitted to the rotary body having the vanes. When an access signal is given to the optical head from the controller, the clutch means stops the transmission of the rotational movement from the rotary drive means to the rotating body in response to the access signal. Therefore, when the access signal is given to the optical head, the rotating body does not rotate. That is, when the optical head is not accessed, the rotating body can be rotated to cool the inside of the housing. When an access signal is given from the controller to the optical head, seek processing and signal processing are performed as in a normal optical disk device.

[0010]

Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings.

FIG. 1 is a partially cutaway schematic perspective view showing an optical information recording / reproducing apparatus according to an embodiment of the present invention, and FIG. 2 is a schematic perspective view showing a main part of the apparatus shown in FIG.

This device includes a disk 2 in a housing 1.
A spindle motor 3 for rotating the disk, and an optical head 4 for reproducing and recording signals from the disk.
And an access mechanism 5 for moving the optical head 4 to a predetermined position on the disk. In this example, the disc 2 is rotatably accommodated in a cartridge 6 and is arranged in the housing 1 by inserting the cartridge 6 from an insertion opening 7 of the housing 1.
Further, in this example, a hub (not shown) formed in the central portion of the disk 2 is magnetically attracted by a magnet or the like attached to the rotary shaft of the spindle motor 3.

The apparatus also includes a control circuit (not shown) for controlling the rotation of the motor 3 and the operation of the access mechanism 4, and a signal processing circuit (not shown) for processing a reproduction / recording signal.

A friction wheel 8 is attached to the rotation shaft of the spindle motor 3, and is provided adjacent to the rotation shaft of the spindle motor 3 and facing the friction wheel 8 so as to be rotatable by a bearing 9. A supported rotating body 10 is provided. A fan 11 is attached to the rotating body 10.

A clutch mechanism is provided between the friction wheel 8 and the rotating body 10 in order to transmit the rotational movement of the spindle motor 3 to the rotating body 10.
In this example, the clutch mechanism includes a movable pulley 12 that can come into contact with the friction wheel 8 and the rotating body 10, a bearing 13 that rotatably supports the rotating shaft of the movable pulley 12, and a bearing 13 that is fixed to the bearing 13. The bearing 13 is composed of a plunger 14 that moves back and forth in the direction of the friction wheel 8 and the rotating body 10.

FIG. 3 is a block diagram showing the electrical construction of the optical information recording / reproducing apparatus shown in FIG. This apparatus includes a detection circuit 21 for detecting the mounting of the disk 2, and a control circuit 22 for making the optical head 4 and the access mechanism 5 responsive in response to a detection signal from the detection circuit 21. The detection signal from the detection circuit 21 is also given to the drive circuit 23 of the spindle motor 3, and the spindle motor 3 rotates.

The detection signal detected by the optical head 4 is
It is applied to a signal recording / reproducing circuit 24 for recording / reproducing a signal to record information on the disc 2 or reproduce the recorded information. Further, the detection signal detected by the optical head 4 is also given to the auto-focusing servo circuit 25 and the auto-tracking servo circuit to perform focusing servo and tracking servo.

The device is also provided with a conventional mechanism provided in the optical disk device, such as a radial feed mechanism.

From the control circuit 22 to the optical head 4
A control signal (access signal) to the drive circuit 28 is given to the drive circuit 28 of the plunger 14 constituting the clutch mechanism via the inverter 27.

Therefore, when the access signal is given from the control circuit 22 to the optical head 4, the operation of the clutch mechanism is stopped, and when the access signal is not given to the optical head 4, the clutch mechanism is operated. That is, in the example shown in FIGS. 1 and 2, when the access signal is not given from the control circuit 22 to the optical head 4, the plunger 14 moves the movable pulley 12 forward in response to the access signal, The movable pulley 12 contacts the friction wheel 8 and the rotating body 10. Therefore, even if the temperature inside the housing 1 rises, the rotary motion of the spindle motor 2 can be transmitted to the rotating body 10 via the pulley 12, and the housing 1 rotates without installing a blower outside or inside the housing 1. The inside of the housing 1 can be cooled by the fan 11.
That is, the self-cooling effect can be generated in response to the access signal from the controller 21.

In the above-mentioned apparatus, the friction wheel of the motor is not always required unless the rotation of the disk is hindered, and the movable pulley may be brought into contact with the rotating shaft of the motor and the rotating body. Further, the diameter of the rotary shaft of the spindle motor may be increased. Also in this case, the friction wheel and the like are not always necessary. Further, a normal gear or the like may be attached to the rotary shaft of the spindle motor.

Further, the rotating body provided adjacent to the spindle motor may also have a gear shape. Furthermore, the transmission means for transmitting the rotational movement of the motor to the rotating body is not limited to the pulley, but may be a gear, a friction wheel, or the like.

The structure of the fan attached to the rotating body is not particularly limited as long as it has a blowing ability. That is, generally, the rotation speed of the spindle motor is high. on the other hand,
In order to reduce the temperature inside the housing, the rotation speed of the fan does not have to be very high. Therefore, at least one blade may be attached to the rotating body. When a plurality of blades are attached to the rotating body, it is preferable to attach a plurality of blades at equal intervals in order to prevent vibration and the like and to rotate the body smoothly. Furthermore, in order to adjust the number of rotations of the rotating body, a speed varying mechanism such as a plurality of pulleys and gears may be interposed between the rotating shaft of the spindle motor and the rotating body.

Further, in the illustrated example, a rotating body having a fan is arranged adjacent to the spindle motor, but the rotating body is a cutting member capable of transmitting the rotational movement of the spindle motor and is placed at an appropriate position in the housing. Can be installed at

The type of the clutch mechanism is not particularly limited as long as it stops transmitting the rotational movement from the transmitting means to the rotating body in response to the access signal from the controller to the optical head. For example, in the illustrated example, in response to an access signal to the optical head, a plunger for retracting the transmission means in a direction away from the friction wheel and the rotating body, and a friction when the access signal is not given to the optical head A plunger for advancing the transmission means in the direction of the vehicle and the rotating body may be provided. Further, an air cylinder and a hydraulic cylinder may be used instead of the plunger. Further, the clutch mechanism includes a rotary shaft arranged in parallel between the rotary shaft of the spindle motor and the rotary body, a forward / backward moving means for moving the rotary shaft forward and backward, and a rotary shaft of the spindle motor and the rotary body. And a contact rotating member such as a friction wheel that can be brought into contact with the friction wheel and the rotating body.

[0026]

According to the optical information recording / reproducing apparatus of the present invention,
When the access signal from the controller is not given to the optical head, the rotary drive means can transmit the rotary motion to the rotary body to rotate the rotary body and the blade. Therefore, the inside of the housing can be efficiently cooled, and the rotary motion by the rotary drive means can be effectively used, and energy efficiency can be improved. Further, since the inside of the housing can be self-cooled by the rotation of the blades, the cooling efficiency is high even with a small size.

[Brief description of drawings]

FIG. 1 is a partially cutaway schematic perspective view showing an optical information recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic perspective view showing a main part of the device shown in FIG.

FIG. 3 is a block diagram showing an electrical configuration of the optical information recording / reproducing apparatus shown in FIG.

[Explanation of symbols]

 1 ... Housing 2 ... Disk 3 ... Spindle Motor 4 ... Optical Head 10 ... Rotating Body 11 ... Fan 12 ... Movable Pulley 14 ... Plunger 22 ... Control Circuit 27 ... Inverter

Claims (1)

[Claims] 1. An apparatus comprising: a rotation driving means for rotating a disk in a housing; an optical head for recording / reproducing a signal to / from the disk; and a controller for giving an access signal to the optical head. In response to an access signal from the controller, which is rotatably disposed in the housing and has blades, transmission means for transmitting the rotational movement of the rotation drive means to the rotation body, An optical information recording / reproducing apparatus comprising: clutch means for stopping transmission of rotary motion from the rotary drive means to a rotary body.