JPS61170936A - Recording and reproducing device - Google Patents

Abstract

PURPOSE:To obtain an acceleration signal having a good S/N ratio by detecting oscillation or acceleration of an impact applied to a device a specific time after the device is powered on. CONSTITUTION:Signals of acceleration detectors 24, 32, and 35 are inputted to an abnormality detecting circuit 38 through band-pass filters 26, 33, and 36 and switches 27, 34, and 37. A timer 44 sends a signal for short-circuiting the switches 27, 34, and 37 the specific time after the power source is turned on to input terminals for on/off operation. Therefore, signals of the band-pass filters 26, 33, and 36 are sent to a control element 14, a linear motor 15, and the abnormality detecting circuit 38 the specific time after the power source is turned on, so the device neither breaks down nor malfunctions owing to a transient signal in the power-on operation. Consequently, an acceleration signal which has a small temperature drift and a good S/N ratio is obtained and the reliability of the device is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a recording and reproducing device for reproducing signals recorded on a record carrier or for recording signals on a record carrier.

BACKGROUND OF THE INVENTION The above-mentioned types of devices include magnetic recording and reproducing devices, magneto-optical recording and reproducing devices, optical recording and reproducing devices, optical reproducing devices, and capacitive reproducing devices. A conventional example will be explained as an example.

For example, in an optical recording/reproducing device, an original beam generated from a light source such as a semiconductor laser is converged into a small beam diameter using a converging lens, and then irradiated onto a rotating disc-shaped record carrier. There are devices that record by changing the amount of light depending on the signal to be recorded, and when reproducing, the light intensity of the light beam is made weak and constant, and the signal is reproduced by detecting the reflected light or transmitted light from the record carrier.

Some recording carriers used in this type of device have, for example, tracks in the form of protrusions and recesses provided in advance on the surface of a base material, and a recording material layer formed on the surface by means such as vapor deposition. Such tracks have a spiral shape or a concentric circle shape, and the track pitch and track width are very narrow, for example, the pitch is about 1.6 μm and the width is about 0.6 μm.

Therefore, in order to obtain a high-quality reproduction signal, the optical recording/reproducing apparatus described above uses a focus control method so that the light beam irradiated onto the rotating record carrier always has a microscopic diameter of one hand. A control means and a tracking control means for controlling the light beam focused on the record carrier so that it always accurately scans the track are essential.

Focus control involves detecting the convergence state of the light beam on the record carrier from the light beam reflected from the record carrier, and moving the collection lens in a direction perpendicular to the record carrier surface in accordance with the detected signal. However, the control accuracy of focus control is required to be extremely precise, for example ±
It is 0.5 μm or less.

Tracking control also involves detecting a positional deviation between a light beam focused on a record carrier and a track from a light beam transmitted through the record carrier or a light beam reflected from the record carrier, and responding to this detected signal. Cヮ bundle 7 O within 1゜carrier. Half □ka. However, like focus control, tracking control requires extremely high precision, for example, ±0.1 μm or less.

The movement range in which the converging lens can be moved in the radial direction within the plane of the record carrier is narrow, about 200 μm at most, and tracking control generally involves moving the converging lens so that the light beam follows the eccentricity of the track. move it,
Transfer control is performed to move the entire optical system including the light source in the radial direction of the record carrier so that the movement of the converging lens becomes zero on average, that is, it moves around its natural state.

Although the optical recording/reproducing device has been described above, such a device requires extremely high precision control and is therefore extremely vulnerable to external vibrations or shocks applied to the entire device.

For example, if the acceleration of external vibration is s, 8m/5ec2, then 10)1. In the case of a sine wave, the entire device is above 2°6
The fabric will also be moved. Therefore, 9.8m/e at 10an
In order for the device to operate reliably against external vibrations with an acceleration of C2, the loop gain of the focus control system must be 101.
74 dB at 4) The loop gain of the racking control system is required to be at least a dB at 10 le.

In addition, the responsiveness of transfer control is also required to be fast.

However, when talking about focus control, there is the surface runout acceleration of the record carrier, and when talking about tracking control, there is the root-stone acceleration of the track.

Therefore, the loop gain of the focus control system and tracking control system is further required.

In order to construct a control system having such a high loop gain, detection of a control signal with a high S/N ratio and a control element with high performance are essential. However, since the above conditions have not been achieved in conventional devices, they are vulnerable to externally applied vibrations or shocks, and there is a strong possibility that track skipping or defocusing may occur. For example, if a track skip occurs while recording a signal, not only will the signal itself not be recorded correctly, but it will also damage other tracks or damage signals already recorded on other trunks. bring results. Furthermore, if track skipping occurs while reproducing a signal that has already been recorded, the expected signal cannot of course be reproduced.

In order to eliminate such drawbacks, the present inventors provided an acceleration detection means for detecting the acceleration of vibration or impact applied to the device, and applied a signal from the acceleration detection means to a control element to perform focus control and It has already been proposed to improve the reliability and stability of the device by improving the vibration resistance of tracking control, etc., and by configuring it so that it does not record when a shock larger than a predetermined value is applied. (Gan Sho 59-123000).

Problems to be Solved by the Invention The device is generally installed on a desk, but for example, the amplitude of sine wave imaging with a maximum acceleration of 9.8 m at 0.1 m is 24.8 m. , equipment is rarely exposed to such low-frequency large vibrations or shocks. Furthermore, it is rarely exposed to large vibrations or shocks of very high frequencies, for example, several kilohertz.

On the other hand, the above-mentioned device is extremely sensitive to voltage fluctuations in the circuit due to temperature changes, that is, temperature drift, and even a minute temperature drift causes focus shift or track misalignment, making it impossible to record high-quality signals on the record carrier or playback. Signal quality may deteriorate.

Therefore, if the acceleration of vibrations or shocks applied to the device is detected through a bandpass filter, an acceleration signal with less temperature drift and a good signal-to-noise ratio (hereinafter referred to as S/N) can be obtained, and the stability of the device can be improved. However, because it does not pass through the low frequency range, an abnormal voltage occurs immediately after the device is turned on, and this abnormal voltage is caused by the focus element.

Focus element, to be added to tracking element, etc.
This caused damage to tracking elements, etc.

The present invention has been made in view of this problem, and it is an object of the present invention to provide a device that is simple and configured so that the abnormal voltage generated when the power is turned on does not have any adverse effects.

Means for Solving the Problems In order to solve the above problems, the present invention is configured to detect the acceleration of vibrations or shocks applied to the device after a predetermined time after the power of the device is turned on. .

Effect of the Invention With the above-described configuration, the present invention can detect the acceleration of vibration or impact applied to the device via a bandpass filter, thereby obtaining an acceleration signal with little temperature drift and a good S/N ratio. Since the abnormal voltage that occurs when the power is turned on is not applied to the device, damage can be prevented.

EXAMPLE Hereinafter, an example of the present invention will be described in detail with reference to the drawings. Note that the same numbers are used to describe the drawings.

FIG. 1 shows an embodiment in which the present invention is applied to a lighthouse type recording/reproducing apparatus.

The record carrier 1 is attached to a disk motor 2 and rotated at a predetermined number of rotations. Light beam 4 generated from light source 3
is made into parallel light by a coupling lens 6, passes through a polarizing beam splitter 6 and a wavelength plate 7, is reflected by a reflecting mirror 8, is converged by a converging lens 9, and is irradiated onto the record carrier 1.

The light beam 4 reflected by the record carrier 1 passes through the converging lens 9 again, is reflected by the reflecting mirror 8, passes through the % wave plate 7, is reflected by the polarizing beam splitter 6, and enters the convex lens 10. . Light beam 4 passing through convex lens 10
As will be described in detail later, the light beam 4 is divided by a splitting mirror 11, a part of the light beam 4 is irradiated onto the photodetector 12, and the remaining light beam 4 is reflected and irradiated onto the photodetector 13. The converging lens 9 is attached to a movable part of a control element 14 that moves in two axes, that is, in a direction perpendicular to the surface of the record carrier 1 and in a radial direction of the record carrier 1, and is moved in two axes by the control element 14. It is configured so that it can be done. light source 3
．． Coupling lens 5° polarizing beam splitter 6,
c Wave plate 79 reflecting mirror 8, control element 14. convex lens 101
The split mirror 11.degree. photodetectors 12 and 13 are attached to a transfer stage 16, and are configured to be moved together in the radial direction of the record carrier 1 by a linear motor 16.

Converging lens 109 divided mirror 11. Photodetector 12 and 1
The configuration of No. 3 will be explained with reference to FIG.

The splitting mirror 11 is composed of a total reflection mirror, and the reflecting surface of the splitting mirror 11 is arranged at an angle of 45° with respect to the optical axis of the original beam 4. The splitting mirror 11 is arranged so that half of the light beam 40 that has passed through the converging lens 9 is irradiated onto its reflecting surface, and the half of the light beam 4 reflected by the splitting mirror 11 is irradiated onto the photodetector 13, and the remaining A half of the light beam 4 is irradiated onto the photodetector 12. To explain further, the splitting mirror 11 directs the light beam 40 in a direction perpendicular to the track direction in a plane perpendicular to the optical axis.
is divided into two, one half of the light beam 4 is irradiated onto the photodetector 13, and the other half of the light beam 4 is irradiated onto the photodetector 12.

The photodetectors 12 and 13 have a two-part structure and have two light receiving areas. The photodetector 12 is arranged so that the direction of its dividing line is in the track direction on the light receiving surface of the photodetector 12, and the photodetector 13 is arranged so that the direction of its dividing line is in the track direction on the light receiving surface of the photodetector 12. It is placed perpendicular to the direction. The difference between the signals of the two light-receiving areas of the photodetector 12 becomes a signal representing the positional deviation between the light beam 4 and the track on the record carrier 1, and the difference of the signals of the two light-receiving areas of the photodetector 13 becomes a signal representing the positional deviation between the light beam 4 and the track on the record carrier 1. light beam 4
Since it is known that the signal represents the convergence state of

In FIG. 1, two outputs of the photodetector 12 are respectively input to a differential amplifier 17, and the differential amplifier 17 outputs a signal according to the difference between the two signals.

As described above, the signal from the differential amplifier 17 becomes a signal representing the positional deviation between the light beam 4 and the track on the record carrier 1, that is, a tracking control signal. The signal from the differential amplifier 17 is applied to the tracking terminal of the control element 14 via a phase compensation circuit for compensating the phase of the tracking control system, a synthesis circuit 19I for compensating the phase of the tracking control system, and a drive circuit 20 for power amplification. .

The control element 14 therefore moves the converging lens 9 in the radial direction of the record carrier 1 in response to the signal from the differential amplifier 17 so that the light beam 4 on the record carrier 1 always scans over the track. Further, the signal of the differential amplifier 17 is transmitted to the phase compensation circuit 219.
Synthesis circuit 22. It is applied to the linear motor 16 via a drive circuit 23 for power amplification, and the linear motor 16
moves the transfer stage 16 so that the movement of the control element 14 in the radial direction of the record carrier 1 becomes zero on average (hereinafter, this control will be referred to as transfer control). The phase compensation circuit 21 is for compensating the phase of the transfer control system.

24 is an acceleration detector for detecting acceleration, and is attached to a frame 26 of the device that supports the disk motor 2 and the like. The acceleration detector 24 detects the acceleration of vibration or shock applied from the outside in a direction perpendicular to the track direction on the record carrier 1, that is, in a direction in which the control element 14 moves in accordance with the signal from the differential amplifier 17.

There are various types of acceleration sensors, and for example, there are those that detect acceleration by detecting the charge generated when force is applied to a piezoelectric element (this effect is called a piezoelectric effect). This type of acceleration sensor cannot detect constant acceleration such as gravitational acceleration, and is limited to a specific frequency range.

The signal of the acceleration detector 24 is, for example, 11 to 1 KHz.
The signal is sent to the combining circuits 19 and 22 via a bandpass filter 26 and a switch 27 that allow the signal to pass through.

The combining circuit 19 outputs a signal obtained by combining the signal of the phase compensation circuit 18 and the signal of the acceleration detector 24, and the combining circuit 22 outputs a signal obtained by combining the signal of the phase compensation circuit 21 and the signal of the acceleration detector 24. Therefore, the control element 14 and the linear motor 16 are driven according to the signal from the acceleration detector 24.

If the entire device is subjected to external vibrations or shocks in the radial direction of the record carrier 1, ie in the direction in which the control element 14 moves in accordance with the signal of the differential amplifier 17, the record carrier 1 will be affected by the frame of the device in response to the external vibrations or shocks. Although the movable portion of the linear motor 16 including the transfer table 16 is moved together with the transfer table 16, the movable portion of the linear motor 16 is subjected to an inertial force. Therefore, if the acceleration detector 24 detects the acceleration applied from the outside and applies this signal to the linear motor 16 to cancel out the inertial force, the transfer table 16 moves together with the frame 25. When the frame 26 and the transfer table 16 move together due to external vibration or shock, the movable portion of the control element 14 including the converging lens 9 is similarly subjected to inertial force. Therefore, the acceleration detector 24
When the signal is applied to the tracking terminal of the control element 14 to cancel the inertial force, the converging lens 9 moves together with the frame 25.

As explained above, if the signal of the acceleration detector 24 is applied to the tracking terminal of the control element 14 and the IJ near motor 16 to cancel out the inertial force, the converging lens 9 and the transfer stage 16
moves integrally with the frame 26, and can prevent the trunk from shifting or jumping as much as possible even when external vibrations or shocks are applied.

The focus control shown in FIG. 1 will be explained below.

The two outputs of the photodetector 13 are respectively input to a differential amplifier 28, and the differential amplifier 28 outputs a signal according to the difference between the two signals. As described above, the signal from the differential amplifier 28 becomes a signal representing the convergence state of the light beam 4 on the record carrier 1, that is, a defocus signal. The signal from the differential amplifier 2 is applied to the focus terminal of the control element 14 via a phase compensation circuit 29 for compensating the phase of the focus control system, a synthesis circuit 30, and a drive circuit 31 for power amplification. . Therefore, the control element 14II''i, the differential amplifier 2B
The converging lens 9 is moved in a direction perpendicular to the surface of the record carrier 1 in accordance with the signal , so that the convergence state of the light beam 4 on the record carrier 1 is always constant.

The acceleration detector 32 is attached to the frame 26,
The acceleration of vibration or impact observed from the outside in a direction perpendicular to the surface of the record carrier 1 is detected.

The signal from the acceleration detector 32 is sent to a synthesis circuit 30 via a bandpass filter 33 and a switch 34.
There is. The combining circuit 3o outputs a signal obtained by combining the signal from the phase compensation circuit 29 and the signal from the acceleration detector 32. The control element 14 is therefore driven in a direction perpendicular to the plane of the record carrier 1 in accordance with the signal from the acceleration detector 32 .

When the entire apparatus is subjected to external vibration or shock in a direction perpendicular to the plane of the record carrier 1, the record carrier 1 moves together with the frame 25, but the control element 1 including the converging lens 9
The movable part 4 receives inertia force. Therefore, the acceleration detector 32
If the acceleration applied from the outside is detected and this signal is applied to the focus terminal of the control element 14 to cancel out the inertial force,
The converging lens 9 moves integrally with the frame 26, and can minimize out-of-focus even when external vibrations or shocks are applied.

Above, we have described how the acceleration detectors 24 and 32 detect the acceleration of externally applied vibrations or shocks to improve the accuracy of focus control and tracking control. However, when large vibrations or shocks are applied, In this case, a track shift or a focus shift occurs, or a track skip or a focus shift occurs.

As a matter of course, the control element 14 and the linear motor 1
There is a limit to the output acceleration of 6, and if vibration or impact exceeding this limit is applied, track skipping or defocusing will occur.

Also, the frame 26. Disc motor 2. It is very difficult to construct the record carrier 1, etc., and therefore it is impossible to completely cancel out externally applied imaging or impact, resulting in track deviation or focus deviation. For example, even if the frame 2 is subjected to external vibration or impact in a direction perpendicular to the surface of the record carrier 1,
Because 6 is not a completely rigid body, it vibrates in all directions.

Furthermore, when vibration or impact is applied from the outside in the track direction of the record carrier 1, that is, in a direction substantially perpendicular to the moving direction of the transfer stage 16, the control element 14 moves in the track direction of the record carrier 1, causing the time axis to change. occurs.

As described above, when a large vibration or impact is received from the outside, the reliability of the device is significantly reduced, and the quality of recorded or reproduced signals cannot be guaranteed. Especially when recording signals, there is a possibility of damaging other tracks or damaging signals already recorded on other tracks.

In order to prevent the worst situation as described above, the present invention is configured to stop or prohibit recording if a vibration or shock larger than a predetermined value is applied. This will be discussed below.

35 is an acceleration detector, 36 is a bandpass filter, and 37 is a switch. The acceleration detector 35 is attached to the frame 26 and detects the acceleration of vibration or shock applied in the track direction on the record carrier 1.

Signals from the acceleration detectors 24, 32 and 36 are input to an abnormality detection circuit 38 via bandpass filters 26, 33 and 36 and switches 27, 34 and 37, respectively.

The abnormality detection circuit 38 will be described in detail later, but when any one of the signals from the acceleration detectors 24, 32, 35 becomes larger than a predetermined value, it generates a signal that indicates that excessive vibration or shock has been applied. is sent to the signal processing circuit 39 and the information processing control device 40. The information processing control device 4o controls the entire device, prohibits recording, notifies external equipment of an abnormal state, and performs self-diagnosis to determine whether focus has been lost or track skipping has occurred. .

To explain recording of a signal, a signal to be recorded is inputted into the storage circuit 42 from the outside through the input terminal 41. After storing the input signal, the storage circuit 42 sends a signal to the information processing control device 4o indicating that the recording signal has been input.
send to The information processing control device 40 confirms that the light beam 4 on the record carrier 1 is on a predetermined track and that the record carrier 1 has come to the position where recording is to be performed, and sends a signal to open the recording gate, for example, HIGH times. The signal is sent to the signal processing circuit 39 and the storage circuit 42. The storage circuit 42 sequentially sends the stored signals to the signal processing circuit 39, and the signal processing circuit 39J sends the stored signals to the storage circuit 4.
A signal is sent to a drive circuit 43 in order to modulate the light source 3 according to the signal sent from the light source 2.

The drive circuit 43 modulates the intensity of the light beam 4 generated from the light source 3, and the shape of the record carrier 1 is changed by the heat of the light beam 4.

If excessive vibration or shock is applied while recording a signal, the abnormality detection circuit 38 sends a signal notifying this to the signal processing circuit 39 and the information processing control device 40, and the signal processing circuit 39 sends a signal to the drive circuit 43. Immediately stops the signal being sent to the light source 3, and the light source 3 outputs a low light intensity during playback. The information processing control device 40 recognizes that recording has been interrupted and notifies external equipment of this fact. The information processing control device 4o controls the device to newly record data in a designated location according to instructions from an external device.

The reason why the switches 27, 34 and 37 are provided will be explained.

As described above, an acceleration sensor using a piezoelectric element cannot detect constant acceleration such as gravitational acceleration. Further, the device to which the present invention is applied is generally placed on a desk, and is rarely subjected to excessive vibration or impact at extremely low frequencies. Therefore, the bandpass filter 26
．． It is desirable to limit the passband of the acceleration detector 24.32 and 36 signals at 33 and 36. However, when the device is turned on, the bandpass filters 26, 33 and 36
A transient signal is output to the output. This transient signal is transmitted to the control element 14. If it is sent to the linear motor 16 or the abnormality detection circuit 38, the device may be damaged or malfunction. Switches 27.34 and 37 allow transient signals of bandpass filters 26.33 and 36 to be passed to control elements 14.
This is to prevent the information from being transmitted to the linear motor 16 and the abnormality detection circuit 38.

The timer 44 sends signals to short-circuit the switches 27, 34 and 37 after a predetermined time after the device is powered on, respectively, to input terminals that operate the switches 27, 34 and 37 to open and close. The signals of the bandpass filters 26.33 and 36 are therefore transmitted to the control element 14.3 after a predetermined time after the device has been switched on. linear motor 1
6 and the abnormality detection circuit 38, the device will not be damaged or malfunction due to transient signals when the power is turned on.

The level detection circuits 51, 52, and 53, which will be explained with reference to FIG.
The signals from the level detection circuits 51, 52 and 53 are input to the OR circuit 64, respectively. The level detection circuits 51, 52 and 63 are configured to output a HIGH signal when the amplitude of the signals from the acceleration detectors 24, 32 and 36 exceeds a predetermined value. For example, the output signals of the acceleration detectors 24, 32 and 36 are α1. Let α2 and α3 be the detection levels of the level detection circuits 51, 52 and 63, respectively, vl and v.
2 and v3 (only heel v1.v2 and v3 are positive real numbers), the level detection circuit 61 detects α<-V or α1
> Outputs a HIGH signal when vl, and the level detection circuit 62
α2 -v2 or α2>■ Outputs a HIGH signal at 20:00, level detection circuit 53 C43<-V3t fcF
i Outputs a HIGH signal when α3>V3. Sho α
1. α2. The polarity of α3 represents the direction of acceleration.

Detection levels v1. of the level detection circuits 51, 52 and 53.
When determining the values of v2 and v3, it is necessary to consider the vibration resistance and impact resistance of the device. i.e. the vibration resistance of the equipment.

Impact resistance varies depending on the direction, and is generally lower in a tracking control system than in a focus control system. this is,
This is due to the difference in tracking control accuracy (±0.1 μm or less) and focus control accuracy (±0.5 μm or less).

The OR circuit 64 outputs a signal corresponding to the logical sum of the level detection circuits 51, 52 and 53, and outputs a signal corresponding to the logical sum of the level detection circuits 51, 52 and 53.
．． If even one of the 53 outputs a HIGH signal, the OR
The circuit 64 outputs a HIGH signal and sends it to the signal processing circuit 39 and information processing control device 4o in FIG.

Although the present invention has been described in detail above, the present invention is not limited in any way by the examples. For example, in an optical audio playback device that plays back a record carrier on which audio etc. are recorded,
It may also be configured to cut off the audio signal when excessive vibration or shock is applied to prevent noise from occurring. Furthermore, in a device that reproduces a record carrier on which data etc. are recorded, it may be configured to assume that an abnormality has occurred if excessive vibration or shock is applied, and to reproduce the desired signal again after stabilization. good.

Further, it may be configured to detect track skipping from the signal of the level detection circuit 61 and take measures accordingly, or if a signal is generated from the level detection circuit 62, it is assumed that the focus control has been lost, and the focus control is It may be configured to operate again.

Although the control element 14 has a two-axis configuration in the embodiment shown in FIG.
One with an axial configuration is known. That is, the control element is configured to be movable in three axial directions: a direction perpendicular to the surface of the record carrier, a track direction on the record carrier, and a direction perpendicular to the track direction on the record carrier. This is because, in the optical video reproducing apparatus, it is necessary to correct fluctuations in the time axis caused by eccentricity of the record carrier.

To explain general time axis correction control, the phases of the synchronization signal included in the reproduced signal and the reference signal are compared, a signal corresponding to the phase difference between the two signals is obtained, and the signal is controlled according to this phase difference. In addition to the terminal for controlling the time axis of the element, the movement of the light beam on the record carrier in the track direction is controlled so that the phase of the synchronization signal included in the reproduction signal maintains a predetermined relationship with the phase of the reference signal.

In a device having time axis correction control as described above, if the signal from the acceleration detector 36 is configured to be applied to the time axis control terminal of the control element, it is possible to minimize time axis fluctuations when external vibrations or shocks are applied. Needless to say, it can be done small.

Effects of the Invention If the present invention is applied, the acceleration of vibration or impact applied to the device can be detected through a bandpass filter, so an acceleration signal with a good S/N ratio and less temperature drift can be obtained, which can improve the performance of the device. Reliability is significantly improved.

In addition, since the abnormal voltage that occurs when the power is turned on is not applied to the control element, it is possible to prevent damage to the control element, and it is resistant to external vibrations or shocks.
It is possible to provide an apparatus in which no focus shift or track shift occurs due to temperature drift.

[Brief explanation of drawings]

Fig. 1 is a block diagram of an embodiment of the present invention applied to an optical recording/reproducing device, Fig. 2 is a diagram illustrating detection of tracking control signals and focus control signals, and Fig. 3 is a block diagram of an abnormality detection circuit. It is. 14... Control element, 16... Linear motor, 24.32.35... Acceleration detector, 2
6,33゜36・・・Band filter, 27,3
4.37・Old・・Switch, 19,22.30・・・・
...Synthesis circuit, 38...Abnormality detection circuit, 39.
...-Signal processing circuit, 40... Information processing control device, 42... Memory circuit, 20°23.31
．． 43... Drive circuit, 44... Timer 〇 Name of agent Patent attorney Toshio Nakao and 1 other person 1st
figure

Claims (12)

[Claims] (1) A device for recording a signal on a record carrier or reproducing a signal recorded on a record carrier, comprising an acceleration detection means for detecting acceleration of the device due to externally applied vibration or shock; abnormal state detection means for detecting that the magnitude of vibration or shock applied to the device exceeds a predetermined value based on a signal from the acceleration detection means; What is claimed is: 1. A recording/reproducing apparatus, comprising: information processing control means for taking corrective action, and configured such that said abnormal state detection means operates after a predetermined period of time after the power of the apparatus is turned on. (2) The recording and reproducing apparatus according to claim 1, characterized in that recording is prohibited when a signal from the abnormal state detection means is generated. (3) The recording/reproducing apparatus according to claim 1, wherein the recording/reproducing apparatus is configured to stop recording when a signal from the abnormal state detection means is generated while recording a signal. (4) The recording/reproducing device according to claim 1, wherein the acceleration detecting means is configured to detect acceleration in three axes of the device, namely, the x-axis, y-axis, and z-axis. (5) The abnormal state detection means is configured to output a signal when the amplitude of any one of the signals in the x-axis, y-axis, and z-axis directions of the acceleration detection means exceeds a predetermined value. A recording/reproducing apparatus according to claim (4). (6) The abnormal state detecting means is configured so that the detection level for detecting the abnormal state is different for the x-axis, y-axis, and z-axis signals of the acceleration detecting means. 5) The recording/reproducing device described in item 5). (7) Conversion means for recording a signal on a record carrier or reproducing a signal recorded on a record carrier, and a scanning position of the conversion means approximately perpendicular to the track direction on the record carrier. a moving means for relatively moving in a direction, a track deviation detecting means for detecting a positional deviation between a track on a record carrier and a scanning position of the converting means, and a moving means for moving the moving means in accordance with a signal from the track deviation detecting means. a control means for controlling the scanning position of the converting means to always scan over a track on the record carrier; and an acceleration detecting means for detecting acceleration of vibration or impact applied to the device in the moving direction of the moving means. 1. A recording/reproducing device comprising: a recording/reproducing device, wherein the signal from the acceleration detecting device is applied to the moving device after a predetermined period of time after the device is powered on. (8) Conversion means for recording a signal on a record carrier or reproducing a signal recorded on a record carrier, and a scanning position of the conversion means approximately perpendicular to the track direction on the record carrier. a first moving means for relatively moving in a direction; and a scanning position of the converting means, including the first moving means, for relatively moving in a direction substantially perpendicular to the track direction on the record carrier. a second moving means; a track deviation detecting means for detecting a positional deviation between a track on a record carrier and a scanning position of the converting means; and moving the first moving means in response to a signal from the track deviation detecting means. first control means for controlling the scanning position of the converting means to always scan over a track on the record carrier; and when the first control means is operating, the first moving means automatically a second control means that moves and controls the second moving means so that the second moving means moves around a state of 1. A recording/reproducing device comprising: a detecting device, and configured such that a signal from the acceleration detecting device is applied to the second moving device after a predetermined period of time after the device is powered on. (9) Recording and reproducing according to claim 8, characterized in that the signal from the acceleration detecting means is also applied to the first moving means after a predetermined period of time after the device is powered on. Device. (10) Convergence means for converging the light beam generated from the light source and irradiating it onto the record carrier, convergence state detection means for detecting the convergence state of the light beam on the record carrier, and recording the convergence means. A moving means for moving the light beam in a direction substantially perpendicular to the surface of the carrier, and moving the moving means in response to a signal from the convergence state detection means, so that the convergence state of the light beam on the record carrier is always constant. a control means for controlling the
acceleration detection means for detecting the acceleration of vibration or impact applied to the device in a direction substantially perpendicular to the surface of the record carrier; A recording/reproducing device characterized in that the signal is applied to the moving means. (11) converting means for recording a signal on a record carrier or reproducing a signal recorded on the record carrier; and a moving means for moving the scanning position of the converting means in the track direction on the record carrier; A synchronizing signal separating means for separating a synchronizing signal from the signal reproduced from the converting means, a reference signal generating means for generating a reference signal, and comparing the phases of the signal of the synchronizing signal separating means and the signal of the reference signal generating means. death,
a phase comparison means for outputting a signal according to a phase difference between both signals; and a phase comparison means for driving the moving means according to a signal from the phase comparison means, and a signal from the synchronization signal separation means relative to a signal from the reference signal generation means. and an acceleration detection means for detecting the acceleration of vibration or impact applied to the device in the moving direction of the moving means, and the acceleration detecting means signal is transmitted to the moving means. A recording and reproducing device characterized in that it is configured to add to. (12) The recording/reproducing apparatus according to claim (11), wherein the signal from the acceleration detecting means is applied to the moving means a predetermined time after the power of the apparatus is turned on.