JP2002237158A - Optical recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical recording and reproducing device capable of preventing a floating type slider from colliding with a recoding medium when a battery is consumed. SOLUTION: The optical recording and reproducing device comprises mainly a floating type slider 1, a power source voltage detector 4, and a floating judging circuit 5. The power source voltage detector 4 detects the voltage supplied from a battery 100 at any time. When the battery 100 is consumed and the power source voltage drops lower than a preset value, the floating deciding circuit 5 decides that the floating type slider 1 should not be floated up, and sends a floating halt signal to a slider support control part 3. The slider support control part 3 moves the slider supporting part 2 to go away from the recording medium 10, and also makes the floating type slider 1 refuge to a specified position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical recording / reproducing apparatus for recording / reproducing information by irradiating a recording medium with a laser beam, and more particularly, to an optical recording / reproducing apparatus having a flying type slider which floats on the recording medium. Optical recording and reproducing apparatus.

[0002]

2. Description of the Related Art In recent years, the information society has advanced, and the recording density of an external storage device for storing enormous information has been remarkably improved. In particular, an optical recording / reproducing apparatus for recording / reproducing information by irradiating a recording medium with laser light has been widely used as a high-density external storage device. Optical recording / reproducing devices include an optical disk recording / reproducing device using a phase change material or an organic dye for a recording layer, and a magneto-optical disk recording / reproducing device.

In recent years, as a technique for increasing the density of an optical recording / reproducing apparatus, the wavelength has been reduced by using a shorter wavelength light source and a higher numerical aperture (NA) of an objective lens. An optical recording / reproducing apparatus provided with a flying slider has attracted attention. In an optical recording / reproducing apparatus having a flying slider, information is recorded / reproduced by flying the flying slider using an air flow when a recording medium rotates. Generally, at least one of a magnetic head and an optical lens is mounted on a flying slider. For example, in a configuration in which only a magnetic head is mounted on a flying slider, the frequency of an external magnetic field applied to a recording medium by the magnetic head can be increased, and an optical recording / reproducing apparatus capable of high-speed magneto-optical recording is provided. Provided. Also, an optical recording / reproducing apparatus in which an optical lens is mounted on a flying slider has been proposed, and attention has been paid to a technique relating to an optical recording / reproducing apparatus having a flying slider.

As a technique utilizing such a flying type slider for optical recording / reproducing, Japanese Patent Application Laid-Open No. H11-213419 discloses an optical recording system capable of high-density recording / reproducing using a slider type head equipped with a solid immersion lens. An optical head and an optical recording / reproducing device that perform tracking operation control of the reproducing device with high accuracy are disclosed. JP-A-11-213
According to Japanese Patent No. 419, a slider placed on the upper recording surface of a magneto-optical disk rotated by a spindle motor and floated from this surface by an air bearing is provided with a solid immersion lens at a position close to the upper recording surface of the disk. Is disposed, and an objective lens for condensing recording / reproducing light on a solid immersion lens is disposed on the upper side of the optical head to form an optical head.
This optical head is held by a head arm via a fine movement actuator, and performs high-accuracy tracking control by control by a fine movement actuator in addition to rotation control of the head arm by a voice coil motor. As another example, Japanese Patent Application Laid-Open No. 2000-21041 discloses a flying magnetic head device and a signal reproducing method and a recording / reproducing method using the same. JP 2000-2104A
In Japanese Patent Application Publication No. 1 (1993) -1989, a flying magnetic head device is used in which an optical system having a numerical aperture NA of 1 or more is arranged on a flying slider, and a magneto-optical film having a magneto-optical effect is formed at a focal position thereof. When reproducing the information signal of the magnetic disk on which the perpendicular magnetization film is formed, the information signal is transferred to the magneto-optical film of the floating magnetic head device,
This is read by an optical system having a numerical aperture NA of 1 or more.

[0005]

However, the above-mentioned prior art has the following problems. That is, when the optical recording / reproducing apparatus provided with the flying slider is reduced in size to be portable and driven by a battery, it is difficult to secure the flying stability of the flying slider.
This problem is particularly noticeable when an optical lens is mounted on a flying slider. The technology of mounting only a magnetic coil on a flying slider is already common in the field of magnetic disk recording / reproducing devices, and there is no major problem with respect to flying stability. It is extremely difficult to secure the character. This is because the weight of the optical lens increases, the weight of the flying slider increases, and the probability of relatively small voltage fluctuations in battery driving after battery consumption increases has an adverse effect on flying stability. is there.

The above-mentioned JP-A-11-213419 and JP-A-2000-21041 neither describe nor suggest this problem, and as far as the inventor knows,
There is no prior art which mentions this problem with respect to an optical recording / reproducing apparatus having a flying slider.

An object of the present invention is to provide an optical recording / reproducing apparatus capable of securing the flying stability of a flying slider even when the apparatus is driven by using a battery.

[0008]

According to the present invention, in an optical recording / reproducing apparatus for a recording medium, a flying slider flying above the recording medium, a slider support for supporting the flying slider, and the recording medium. A light source for irradiating the medium with laser light, and a power supply voltage detector for detecting a power supply voltage supplied to drive the optical recording / reproducing apparatus,
A flying determination circuit for determining whether to float the flying slider based on a power supply voltage detected by the power supply voltage detector, and the flying determination circuit has determined that the flying slider is not to fly. In this case, there is provided an optical recording / reproducing apparatus, wherein the slider supporting portion moves the flying slider away from a flying position on the recording medium.

The optical recording / reproducing apparatus of the present invention comprises at least
A flying slider that floats with respect to the recording medium, a slider support that supports the flying slider, and a slider support controller that controls the operation of the support, and irradiates the recording medium with laser light to transfer information. An optical recording / reproducing apparatus for performing recording / reproducing, further comprising: a power supply voltage detector for detecting a supplied power supply voltage; and a flying determination circuit for determining whether to fly a flying slider. When the flying determination circuit determines that the flying slider is not to fly based on the power supply voltage detected by the voltage detector, the flying slider can be separated from the recording medium to retract the flying slider. At this time, the flying determination circuit may have a configuration in which when the power supply voltage detected by the power supply voltage detector is smaller than a predetermined threshold, it is determined that the floating is not performed. Furthermore, it is particularly desirable that when the fluctuation of the power supply voltage detected by the power supply voltage detector at a predetermined time is larger than a predetermined threshold value, the floating determination circuit determines not to float. . If the flying determination circuit determines that the flying slider is not to fly, a flying stop signal is input to the slider support control unit to separate the flying slider support from the recording medium and retreat the flying slider. preferable. In addition, it is particularly preferable to include a floating slider retracting position fixing device for fixing the floating slider support portion when the floating slider is retracted. Such an optical recording / reproducing apparatus includes a case where a magneto-optical effect is used for reproducing information. Further, the optical recording / reproducing apparatus according to the aspect of the present invention is configured in consideration of driving using a battery, but can be driven using an AC power supply.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the optical recording / reproducing apparatus according to the present invention will be specifically described below with reference to the drawings, but the present invention is not limited thereto.

FIG. 1 shows a configuration diagram of an optical recording / reproducing apparatus according to the present invention. An optical recording / reproducing apparatus 200 according to the present invention includes a flying slider 1 that floats on a recording medium 10, a slider support 2 that supports the flying slider 1, and a slider support drive that controls the operation of the slider support 2. (Slider support controller) 3 and power supply voltage detector 4 for detecting power supply voltage
A flying determination circuit 5 for determining whether or not the flying slider is to fly; a rotation drive system 20 for rotating the recording medium 10; and a recording / reproducing operation by irradiating the recording medium 10 with a laser beam. An optical system 30 and a signal processing system 40;
It is composed of a battery 100. The power supply voltage supplied by the battery 100 is detected by the power supply voltage detector 4 as needed.
A power supply voltage for driving other circuit parts. The rotation drive system 20 includes a spindle 21 and a spindle motor 22 for driving the recording medium 10 to rotate, and a spindle motor control circuit 23 for controlling the rotation of the spindle motor 22. The optical system 30 includes a laser light source 31, a collimator lens 32, a prism 33, a signal detector 34, and a beam splitter 3 as shown in FIG.
5, a mirror 36, and an optical lens 37. In this embodiment, a part of the optical system 30 is also present in the flying slider 1 and the slider support 2. Specifically, as shown in FIG. 2, the optical lenses 37a and 37
7 b is mounted on the flying slider 1, and the mirror 36 is mounted on the slider support 2.

The recording medium 10 is provided on a plastic substrate.
It has a structure in which a dielectric layer, a thermal diffusion control layer, a dielectric layer, a recording layer, and a dielectric layer are sequentially laminated, and a so-called film surface incident recording in which laser light is incident from the side where the recording layer is formed. Medium. AlTi is used as the thermal diffusion control layer, SiN is used as the dielectric layer, and TbFeCo is used as the recording layer.
And laminated by a sputtering method. Recording medium 1
On the substrate of No. 0, track pit signals indicating the track position of the recording area of the recording layer are formed in a wobble arrangement by a sample servo method. The recording medium 10 is mounted on a spindle of a rotary drive system 20 of the optical recording / reproducing apparatus.

As shown in FIG. 2, the flying type slider 1 has optical lenses 37a and 37b and a magnetic coil 38 mounted thereon. The optical lens 37b may be a solid immersion lens. The slider supporting portion 2 corresponds to the floating function of the floating type slider 1 and
Maintain a stable position. The slider support 2 has a form in which a suspension is mounted on a swing arm-shaped support centered on a rotation axis, and a mirror 36 is mounted inside the support.

In FIG. 3, a beam from a laser light source 31 passes through an optical path chamber and travels to a flying slider 1 by a beam splitter 35 attached to a rotating shaft.
The reflected light after being accessed by the recording medium 10 is received by a detector of an optical system fixed to the swing arm. The arm on which the optical system is arranged on the swing arm and the part of the arm on which the optical system is arranged are configured so that the weights are balanced about the rotation axis. At the time of recording / reproduction, the operation of the slider support 2 is controlled by the slider support controller 3 to access a desired address. For such access, focusing and tracking are performed using an actuator mechanism (not shown).

The power supply voltage detector 4 has a function of detecting the power supply voltage of the battery 100 as needed. When the power supply voltage detected by the power supply voltage detector 4 is smaller than a predetermined threshold, the flying determination circuit 5 determines that the flying type slider will not fly. This means that the low power supply voltage itself of the battery 100 indicates that the battery 100 has been consumed,
This is because it is difficult to ensure the flying stability of the flying slider 1 when driving the exhausted battery 100. further,
Even when the fluctuation of the power supply voltage detected by the power supply voltage detector 4 in a predetermined time is larger than a predetermined threshold, it is determined that the power supply voltage does not float. This is because a large variation in the power supply voltage of the battery 100 in a predetermined time is highly likely to indicate the consumption of the battery 100.

When it is determined by the flying determination circuit 5 not to fly, a flying stop signal 60 is input to the slider support controller 3 to perform forced processing completely different from the access at the time of recording / reproduction. That is, the flying type slider 1 is retracted by separating the slider support 2 from the recording medium 10. FIG. 6 shows a control flow of the evacuation operation. As shown in FIG. 6, the power supply voltage detector 4 is operated to determine whether or not the power supply voltage is lower than a preset voltage value. 3 and moves the flying slider 1 above the recording medium 10 so as to move away from the recording medium 10. At this time, the spindle motor 22 is kept rotating. This is because if the rotation of the spindle motor 22 is suddenly stopped, the flying stability of the flying type slider 1 cannot be ensured, and the flying type slider 1 may come into contact with the recording medium 10. Next, a horizontal retreat control command is sent to the slider support drive unit 3 to move the slider support unit 2 in the horizontal direction and retreat to the retraction unit. Thereafter, a vertical retreat control command is sent to the slider support drive unit 3 to retreat the flying slider 1 to the retreat unit 80.

After the floating slider 1 is retracted, the floating slider support 2 is fixed by the floating slider retracting position fixing device 70. As the floating slider retracting position fixing device 70, a configuration in which the floating slider supporting portion 2 was sandwiched as shown in FIG. 9 was used. The floating slider retracting position fixing device 70 can be buried in the lower part during recording and reproduction.

The recording medium loaded in the optical recording / reproducing apparatus may be housed in a cartridge having a shutter mechanism, for example. At the time of recording / reproducing, as shown in FIGS. 7A and 8A, the flying type slider 1 accesses the recording medium 10 from the opening 93 of the cartridge 91, and floats on the recording medium 10 to transfer information. When recording and reproducing data and retreating by detecting an external impact, FIG.
As shown in FIG. 8B and FIG.
Retreats to the retreat unit 80.

In the above embodiment, when a predetermined shock signal is detected, the flying slider 1 is retracted in the vertical direction, and then moved horizontally to be retracted to the retracting section 80. Up and down in the vertical direction,
The recording or reproducing operation may be resumed by lowering again after the impact signal falls below the threshold value.

[0020]

According to the optical recording / reproducing apparatus of the present invention, it is determined whether or not a flying slider floats on a recording medium in accordance with a power supply voltage detected by a power supply voltage detector. The flying stability of the flying slider can be ensured even when driven by using a battery whose supply voltage is reduced. In addition, even when the battery is exhausted, it is possible to prevent the collision between the recording medium and the flying slider, and to provide a highly reliable portable optical recording / reproducing apparatus. .

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of an optical recording / reproducing apparatus of the present invention.

FIG. 2 is a configuration diagram showing the configuration of a flying slider and a slider support in the optical recording / reproducing apparatus of the present invention.

FIG. 3 is a configuration diagram showing an optical system in the optical recording / reproducing apparatus of the present invention.

FIG. 4 is a perspective view showing a state before and after retracting a flying slider in the optical recording / reproducing apparatus of the present invention.

FIG. 5 is a plan view showing a state before and after retracting a flying slider in the optical recording / reproducing apparatus of the present invention.

FIG. 6 is a flowchart showing a control flow for retracting a flying slider in the optical recording / reproducing apparatus of the present invention.

FIG. 7 is a perspective view showing a state before and after retracting a flying slider when a cartridge having a shutter mechanism is used as a recording medium in the optical recording / reproducing apparatus of the present invention.

FIG. 8 is a plan view showing states before and after retracting a flying slider when a recording medium is housed in a cartridge having a shutter mechanism in the optical recording / reproducing apparatus of the present invention.

FIG. 9 is a perspective view of a floating slider retracting position fixing device for fixing the retracted floating slider in the optical recording / reproducing apparatus of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flying type slider 2 Slider support part 3 Slider support drive part 4 Power supply voltage detector 5 Flying determination circuit 20 Rotation drive system 30 Optical system 40 Signal processing system

Claims (6)

[Claims] 1. An optical recording / reproducing apparatus for a recording medium, comprising: a flying slider flying above the recording medium; a slider support for supporting the flying slider; and a light source for irradiating the recording medium with laser light. A power supply voltage detector for detecting a power supply voltage supplied to drive the optical recording / reproducing device; and a method for floating the flying slider based on the power supply voltage detected by the power supply voltage detector. A floating determination circuit for determining whether or not the floating slider is not to fly the floating slider, the slider support portion, the floating slider from the flying position on the recording medium from the floating position An optical recording / reproducing device, which is separated from the optical recording / reproducing device. 2. The flying determination circuit determines that the flying slider does not fly when a power supply voltage detected by the power supply voltage detector is smaller than a predetermined value. Item 2. The optical recording / reproducing device according to item 1. 3. The flying determination circuit does not fly the flying slider when a fluctuation value of a power supply voltage detected by the power supply voltage detector at a predetermined time is larger than a predetermined value. 3. The optical recording / reproducing apparatus according to claim 1, wherein: And a slider support control section for controlling an operation of the slider support section, wherein the flying determination circuit comprises:
If it is determined that the flying slider is not to fly, a flying stop signal is sent to the slider support controller, and the slider support controller to which the flying stop signal has been input moves the flying slider away from the recording medium. Controlling the flying type slider supporting portion as described above.
4. The optical recording / reproducing apparatus according to any one of 3. 5. The optical recording / reproducing apparatus according to claim 1, further comprising a battery as the power supply. 6. The information processing apparatus according to claim 1, further comprising an optical lens and a magnetic coil on the flying slider, and reproducing information using a magneto-optical effect. Optical recording / reproducing device.