JP2005285224A - Recording and reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recording and reproducing device in which data are accurately recorded even though a disk cartridge is mounted for a long period of time in the recording and reproducing device that mounts the disk cartridge storing the optical disk and records the data onto the optical disk. <P>SOLUTION: The recording and reproducing device is provided with a shutter opening and closing means, a turntable, a motor which rotates the turntable, a recording section which records data inputted from the external, a time output means, a setting means which sets the time to conduct backup, a recording and reproducing means and a control means. The control means rotates the turntable for every beforehand set angle in which exposed portions from the shutter of the optical disk are not overlapped and controls the motor so that the turntable makes one revolution within the backup time. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a recording / reproducing apparatus for recording or reproducing an optical disk stored in a disk cartridge.

2. Description of the Related Art Conventionally, a recording / reproducing apparatus for recording and reproducing call information transmitted / received via a telephone line is known. 2. Description of the Related Art A conventional recording / reproducing apparatus includes a DAT drive to which a main recording unit including a hard disk drive (hereinafter referred to as HDD) and a digital audio tape (hereinafter referred to as DAT) can be attached and detached. A storage recording unit is provided (see, for example, Patent Document 1).
FIG. 6 is a block diagram showing a conventional recording / reproducing apparatus.
The recording / reproducing apparatus 100 includes an incoming call detection unit 2, an audio processing unit 3, an audio output unit 4, a main recording unit 6, a storage recording unit 7, an operation / display unit 9, a clock unit 10, and a control unit 500.

  The incoming call detection unit 2 receives a Dual Tone Multi Frequency (hereinafter referred to as DTMF) code transmitted from the telephone of the caller connected to the telephone line, and confirms that the telephone line is connected. It detects and outputs a detection signal to the controller 500. The DTMF code includes information such as the caller telephone number. Therefore, when the DTMF code is recorded in the main recording unit 6 together with the call information, the call information recorded in the main recording unit 6 can be searched using the DTMF code.

  The voice processing unit 3 compresses a voice signal input from the telephone line and converts it into voice data. In addition, the audio processing unit 3 decompresses the audio data recorded in the main recording unit 6 and outputs it to the audio output unit 4. The audio output unit 4 converts the expanded audio data into an analog audio signal and outputs it.

  When a detection signal is input from the incoming call detection unit 2, the control unit 500 controls the main recording unit 6 to record the audio data together with the DTMF code. The main recording unit 6 is composed of an HDD, and records the audio data converted by the audio processing unit 3 under the control of the control unit 500 together with a DTMF code on a hard disk (hereinafter referred to as HD). The clock unit 10 includes a crystal oscillation circuit, and outputs a pulse signal at a predetermined interval from the crystal oscillation circuit.

  The storage recording unit 7 includes a DAT drive, and records audio data in the DAT under the control of the control unit 500. Based on the pulse signal output from the clock unit 10, the control unit 500 stores the audio data recorded in the HD of the main recording unit 6 in the DAT of the storage recording unit 7 every predetermined time, for example, every 24 hours. The main storage unit 7 and the storage recording unit 7 are controlled to back up. The DAT for which the call information is backed up by the storage recording unit 7 is taken out from the storage recording unit 7 and stored.

  The operation / display unit 9 outputs an instruction signal for backing up the call information stored in the main recording unit 6 to the storage recording unit 7. Further, the operation / display unit 9 outputs an instruction signal instructing to reproduce the call information recorded in the main recording unit 6 and the storage recording unit 7. The operation / display unit 9 includes a display unit that displays an operation state of the recording / reproducing apparatus 100.

  The control unit 500 backs up the audio data recorded in the HDD of the main recording unit 6 to the DAT of the storage recording unit 7 according to the instruction signal output from the operation / display unit 9 or the HD of the main recording unit 6 The audio processing unit 3, the audio output unit 4, the main recording unit 6, and the storage recording unit 7 are controlled so as to reproduce the audio data recorded in the DAT of the storage recording unit 7.

  The conventional recording / reproducing apparatus 100 uses an HDD capable of random access at high speed for the main recording unit 6 to immediately search and reproduce desired audio data from the audio data recorded on the HD of the main recording unit 6. can do. However, since HD has a limited capacity for recording call information, the call information recorded in the main recording unit 6 is backed up to the DAT by the storage recording unit 7 at regular intervals, and is stored in the HD of the main recording unit 6. A configuration in which the main recording unit 6 can always record new call information by erasing the audio data stored in the DAT out of the recorded audio data and ensuring a new recordable capacity. It has become.

  A DAT drive used as a storage recording unit of a conventional recording / reproducing apparatus records audio data on a DAT, which is a tape medium, and therefore, a desired audio from the call information recorded on the DAT compared to the HDD. It takes a long time to retrieve and play the data. Therefore, instead of using a DAT drive as the storage recording unit 7, by using an optical disk drive such as an MO drive that uses a MO (Magneto Optical disk) as a recording medium to record call information on a disk composed of a magneto-optical disk, Call information recorded as compared with a conventional DAT drive can be quickly retrieved and reproduced.

  A conventional optical disk drive records audio data such as call information on a removable disk cartridge and reproduces audio data recorded on the disk cartridge (see, for example, Patent Document 2).

FIG. 7 shows a conventional disk cartridge and optical disk drive.
The disc cartridge 20 includes a disc 21, a case portion 22, and a shutter 23. The disk 21 is composed of a magneto-optical disk, and has a center hole 211 in the approximate center and is accommodated in the case portion 22. The case portion 22 includes a hole 222 and a hole 223 on the upper surface and the lower surface, respectively, and the surface of the disk 21 is exposed to the outside from each hole. The case portion 22 includes a recess 221 formed at one end from the upper surface to the lower surface via the side surface. The shutter 23 forms a U-shape and is attached to the case portion 22 so that the concave portion 221 can slide.

  The optical disk drive includes an insertion port 16 on the front surface of the housing 15 through which the disk cartridge 20 can be inserted in the direction of arrow B. The optical disc drive includes an optical pickup 702, a magnetic head 703, a head drive unit 704, a turntable 705, a shutter opening / closing unit 707, a mechanical base (not shown), a cartridge holder, a spindle motor, and a control unit inside the housing 15. The cartridge holder holds the disc cartridge 20 inserted from the insertion port 16. The shutter opening / closing unit 707 includes a lever that moves in conjunction with the insertion of the disk cartridge 20 and an engagement unit that engages with the shutter 23. In conjunction with the insertion of the disk cartridge 20 in the direction of arrow B, the engaging portion automatically slides the shutter 23 in the direction of arrow C to open the hole 222 and hole 223 of the disk cartridge 20. The shutter opening / closing unit 707 slides the shutter 23 of the disk cartridge 20 in conjunction with the ejection of the disk cartridge 20 to the outside of the recording / reproducing apparatus 100 to close the hole 222 and the hole 223 of the disk cartridge 20.

  The turntable 705 holds the center hole 211 of the disk 21. The turntable 705 rotates the disk 21 as the spindle motor rotates. The optical pickup 702 is disposed at a position below the hole 223 of the disk 21, irradiates the laser beam to the lower surface of the disk 21 through the hole 223 of the case portion 22, and reads data recorded on the disk 21. The control unit controls to reproduce the data read by the optical pickup 702.

  The magnetic head 703 includes a disk contact portion (not shown) and a magnetic field applying portion at a position above the contact portion, and is fixed to the head drive portion 704, respectively. The magnetic head 703 is driven by the head drive unit 704, and the contact part comes into contact with the upper surface of the disk 21 through the hole 222 of the case part 22, and the magnetic field application part applies an NS magnetic field to the disk 21. The control unit performs focus control, tracking control, and laser output control of the optical pickup 702. The control unit controls the optical pickup 702 and the magnetic head 703 so as to record data on the disk 21. The magnetic application unit of the magnetic head 703 applies a magnetic field to the disk 21 under the control of the control unit. The optical pickup 702 irradiates the disk 21 with a laser in a state where the magnetic head 703 applies a magnetic field under the control of the control unit, and changes the magnetization direction of the magnetization film by setting the magnetization film of the disk 21 to a certain temperature or higher. Invert and record data.

  With this configuration, the conventional optical disk drive records data on the disk 21 inside the disk cartridge 20, and reads and reproduces data recorded on the disk 21.

  As described above, instead of using the DAT drive as the storage recording unit 7 of the conventional recording / reproducing apparatus 100, by using the optical disc drive, the audio data recorded as compared with the conventional DAT drive can be quickly retrieved and reproduced. Can do.

JP 2001-127877 A

JP-A-5-250787

  In the conventional optical disk drive, when the disk cartridge 20 is inserted, the shutter 23 of the disk cartridge 20 is opened and a part of the surface of the disk 21 is exposed from the hole 222.

  When a conventional optical disk drive is used as the storage recording unit 7 of the recording / reproducing apparatus 100, the optical disk drive backs up audio data recorded in the main recording unit 6 at regular intervals while the disk 21 is inserted. Do. When the above-described backup operation is not performed, the optical disk drive stops the rotation of the disk 21 with the disk 21 inserted. When the rotation of the disk 21 is stopped, a part of the disk surface remains exposed from the hole 222. Therefore, dust floating in the air enters through the hole 222 of the disk cartridge 20 during this time and adheres to a part of the upper surface of the disk 21.

  The magnetic head 703 applies a magnetic field to the disk 21 in order to back up the audio data recorded in the main recording unit 6 to the disk 21 of the storage recording unit 7 in a state in which dust that has entered from the hole 222 is attached to a part of the upper surface of the disk 21. When a portion of the disk 21 to which dust is attached is applied, the contact portion of the magnetic head 703 rides on the attached dust. As a result, the distance between the magnetic field applying portion of the magnetic head 703 and the upper surface of the disk 21 is larger than that of the upper surface portion of the disk 21 to which no dust adheres, and the magnetic field strength applied to the disk 21 is reduced. If the distance between the magnetic field application unit and the disk 21 becomes larger than a certain distance due to dust adhering to a part of the upper surface of the disk 21, the magnetization direction of the magnetic film of the disk 21 cannot be reversed, and the optical pickup 702 emits a laser. However, the sound data cannot be recorded on the disk 21 accurately.

  When the audio data recorded in the main recording unit 6 cannot be backed up by the storage recording unit 7, the storage capacity of the main recording unit 6 is saturated and new audio data is recorded in the main recording unit 6. There is a risk that it will not be possible. In this case, the disk cartridge 20 mounted on the storage recording unit 7 may be replaced with a new disk cartridge. However, when the recording / reproducing apparatus 100 is operated unattended at night or the like, the disk cartridge cannot be replaced.

  The present invention provides a recording / reproducing apparatus in which a disk cartridge containing an optical disk is mounted and data is recorded on the optical disk, and the data can be recorded accurately even when the disk cartridge is mounted for a long time. The purpose is to do.

  According to the first aspect of the present invention, in a recording / reproducing apparatus in which a disk cartridge having a shutter for accommodating and opening and closing an optical disk is detachable, the shutter is opened in conjunction with the insertion of the disk cartridge and the disk cartridge is ejected. Shutter opening / closing means for closing the shutter, a turntable for holding the center hole of the optical disc, a motor for rotating the turntable, a recording unit for recording data inputted from the outside, and a time output means for outputting time information Setting means for setting a time for backing up the data recorded in the recording unit to an optical disc; recording / reproducing unit for recording data on the optical disc or reproducing data recorded on the optical disc and the recording unit; Rotation control of the motor and control of the recording / reproducing means The control means includes the backup time set by the setting means and the time information output by the time output means for each predetermined angle at which a portion exposed from the shutter of the optical disc does not overlap. The turntable is rotated, and the motor is controlled so that the turntable rotates once within a backup time.

  According to the recording / reproducing apparatus of the present invention, in a recording / reproducing apparatus in which a disk cartridge containing an optical disk is mounted and data is recorded on the optical disk, data can be accurately recorded even when the disk cartridge is mounted for a long time. The recording / reproducing apparatus which can be provided can be provided.

  Further, according to the recording / reproducing apparatus of the present invention, since the user has forgotten to change the time for rotating the disk 21 every predetermined time despite the change of the backup time, the audio data Can not be backed up.

  Embodiments of the present invention will be described with reference to the drawings. In addition, the same code | symbol is used about the part same as the component shown by the prior art.

FIG. 1 is a perspective view showing the appearance of an embodiment of the recording / reproducing apparatus of the present invention.
FIG. 2 is a block diagram showing the configuration of an embodiment of the recording / reproducing apparatus of the present invention.

The recording / reproducing apparatus 1 includes an insertion port 16 and an operation / display unit 9 on the front surface of a housing 15, and a storage recording unit 7 inside the housing 15.
The recording / reproducing apparatus 1 includes an incoming call detection unit 2, an audio processing unit 3, an audio output unit 4, a control unit 5, a main recording unit 6, a storage recording unit 7, a detection unit 8, an operation / display unit 9, a clock unit 10, and A backup time setting unit 11 is provided.

  The incoming call detection unit 2 receives the DTMF code transmitted from the caller telephone connected to the telephone line, detects that the telephone line is connected, and outputs a detection signal to the control unit 5. The DTMF code includes information such as the caller telephone number. Therefore, when the DTMF code is recorded in the main recording unit 6 together with the call information, the call information can be searched using the DTMF code.

  The voice processing unit 3 compresses a voice signal input from the telephone line and converts it into voice data. In addition, the audio processing unit 3 decompresses the audio data recorded in the main recording unit 6 and outputs it to the audio output unit 4. The audio output unit 4 converts the expanded audio data into an analog audio signal and outputs it.

  When the detection signal is input from the incoming call detection unit 2, the control unit 5 controls the main recording unit 6 to record the audio data. The main recording unit 6 is composed of an HDD, and the audio data converted by the audio processing unit 3 under the control of the control unit 5 is recorded on the HD together with the DTMF code. The clock unit 10 includes a crystal oscillation circuit, and outputs a pulse signal at a predetermined interval from the crystal oscillation circuit.

  The storage recording unit 7 records audio data on the disk cartridge 20 under the control of the control unit 5. The configuration of the disk cartridge 20 will be described later.

  The backup time setting unit 11 is a disc in which the audio data recorded in the main recording unit 6 is mounted on the storage recording unit 7 in order to ensure a capacity that allows the main recording unit 6 to always record new audio data. A series of operations, that is, a backup operation is performed in which the audio data recorded on the disk 21 of the cartridge 20 is periodically recorded, and the audio data recorded on the storage recording unit 7 out of the audio data recorded on the main recording unit 6 is deleted. The time (backup time) from the start to the next backup operation is set to an arbitrary time, and a setting signal indicating the set time is output.

  Based on the time information output from the clock unit 10 and the setting signal output from the backup time setting unit 11, the control unit 5 records the audio data recorded in the main recording unit 6 for each backup time set by the backup time setting unit 11. The main recording unit 6 and the storage recording unit 7 are controlled so as to back up to the disk cartridge 20 mounted on the storage recording unit 7.

  The operation / display unit 9 outputs an instruction signal instructing to reproduce the audio data recorded in the main recording unit 6 and the storage recording unit 7. The operation / display unit 9 includes a display unit that displays an operation state of the recording / reproducing apparatus 1.

  The control unit 5 reproduces the audio data recorded in the main recording unit 6 and the storage recording unit 7 in accordance with the instruction signal output from the operation / display unit 9, the audio processing unit 3, the audio output unit 4, the main recording The unit 6 and the storage recording unit 7 are controlled.

  3A and 3B are diagrams illustrating the configuration of the disk cartridge 20, in which FIG. 3A is a top view, FIG. 3B is a bottom view, and FIG. 3C is a state in which the shutter 23 is slid from the state of FIG. FIG. 4D is a bottom view of FIG.

  The disc cartridge 20 includes a disc 21, a case portion 22, and a shutter 23. The disk 21 is composed of a magneto-optical disk, and has a central hole 211 in the approximate center and is accommodated in the case portion 22. The case portion 22 includes a hole 222 and a hole 223 that penetrate the upper surface and the lower surface, respectively. The case portion 22 includes a recess 221 at one end from the upper surface to the lower surface through the side surface. The shutter 23 forms a U-shape, and is held by the case portion 22 so that the concave portion 221 can slide in the directions of arrows C and D. In the disk cartridge 20, when the shutter 23 is slid in the direction of arrow C, the hole 222 and the hole 223 of the case portion 22 are opened, and the hole 222 and the hole 223 are opened as shown in FIGS. A part of the surface of the disk 21 is exposed from 223.

  4 is a diagram showing the storage recording unit 7 of the recording / reproducing apparatus 1 according to an embodiment of the present invention. FIG. 4 (a) is a top view showing a state in which the disk cartridge 20 is inserted, and FIG. ) Is a side view of FIG.

  The storage recording unit 7 includes a mechanical base 701, an optical pickup 702, a magnetic head 703, a head driving unit 704, a turntable 705, a spindle motor 706, a shutter opening / closing unit 707, a cartridge holder and a control unit (not shown). The mechanical base 701 holds an optical pickup 702, a head driving unit 704, a spindle motor 706, and a shutter opening / closing unit 707.

  The cartridge holder holds the disc cartridge 20 inserted from the insertion port 16. The shutter opening / closing portion 707 includes a lever that moves in conjunction with the insertion of the disk cartridge 20 and an engagement portion that engages with the shutter 23. The engagement portion engages with the insertion of the disk cartridge 20 in the arrow B direction. Slides the shutter 23 in the direction of arrow C to open the hole 222 and the hole 223 of the disk cartridge 20. The shutter opening / closing unit 707 slides the shutter 23 of the disk cartridge 20 in conjunction with the ejection of the disk cartridge 20 to close the hole 222 and the hole 223 of the disk cartridge 20.

  The spindle motor 706 rotates the turntable 705 fixed to the shaft under the control of the control unit. The turntable 705 holds the center hole 211 of the disk 21 and rotates the disk 21. The optical pickup 702 is disposed below the hole 223 of the case portion 22, irradiates the disk 21 with laser light through the hole 223, and reads audio data recorded on the disk 21. The optical pickup 702 emits laser light for recording audio data on the disk 21 under the control of the control unit. The control unit controls to reproduce the audio data read by the optical pickup 702. The magnetic head 703 is driven by the head drive unit 704 and applies an NS magnetic field to the upper surface of the disk 21 through the hole 222 of the case unit 22. The control unit performs focus control, tracking control, and laser output control of the optical pickup 702. Further, the control unit controls to record audio data on the disk 21 by the magnetic field from the magnetic head 703 and the laser from the optical pickup 702.

  The detection unit 8 shown in FIG. 2 includes a slide switch (not shown) that moves in conjunction with the insertion of the disk cartridge 20 and returns to the original position in conjunction with the ejection of the disk cartridge 20. The detection unit 8 detects whether or not the disk cartridge 20 is mounted on the storage recording unit 7 by using the slide switch. The detection unit 8 includes a power detection unit 8 a that detects whether power is supplied to the spindle motor 706. The detection unit 8 detects whether or not the spindle motor 706 is rotated by being supplied with power by the power detection unit 8a.

  When the detecting unit 8 detects that the disk cartridge 20 is inserted, the control unit 5 shown in FIG. 2 is based on the setting signal output from the backup time setting unit 11 and the time information output from the clock unit 10. The storage recording unit 7 is controlled to rotate the spindle motor 706 by a predetermined angle at every calculated time. The control unit 5 sets the time from when the spindle motor 706 stops rotating to when the spindle motor 706 is rotated as (backup time) / 6. For example, when the backup time is 24 hours, the time from when the spindle motor 706 stops rotating until the spindle motor 706 is rotated is 24/6 = 4 hours. When the backup time is 12 hours, the time from when the spindle motor 706 stops rotating until the spindle motor 706 is rotated is set to 12/6 = 2 hours. When the backup time is 6 hours, the time from when the spindle motor 706 stops rotating to when the spindle motor 706 is rotated is 6/6 = 1 hour. However, the time from when the spindle motor 706 stops rotating to when the spindle motor 706 is rotated is not limited to these.

  Based on the time information output from the clock unit 10, the control unit 5 rotates the spindle motor 706 calculated based on the backup time described above in a state where the disk cartridge 20 detected by the detection unit 8 is inserted. Determine if the time has been reached. When determining that the time for rotating the spindle motor 706 has been reached, the control unit 5 controls the storage recording unit 7 to rotate the spindle motor 706 by a predetermined angle, for example, 60 degrees.

  FIG. 5 is a diagram showing the storage recording unit 7 of the recording / reproducing apparatus 1 according to an embodiment of the present invention. FIG. 5 (a) is a top view showing a state in which the disk cartridge 20 is inserted, and FIG. FIG. 6 is a top view showing a state after 4 hours have elapsed from the state of FIG. In this embodiment, it is assumed that the backup time set by the backup time setting unit 11 is set to 24 hours.

  As shown in FIG. 5A, a range E indicates a portion where a part of the surface of the disk 21 is exposed from the hole 222 in a state where the shutter 23 is opened by the shutter opening / closing portion 707.

  The backup time setting unit 11 outputs a setting signal indicating that the backup time is 24 hours. Based on the setting signal indicating that the backup time output from the backup time setting unit 11 is 24 hours, the control unit 5 waits until the spindle motor 706 is rotated by 60 degrees after the spindle motor 706 is stopped. Is calculated as 4 hours.

  When the control unit 5 determines that the time when the disk 21 is not rotating has reached 4 hours from the state of FIG. 5A based on the time information output from the clock unit 10, the controller 5 controls the spindle motor 706 to 60 degrees. Control to rotate. As the spindle motor 706 rotates, the disk 21 held on the turntable 705 rotates in the direction of arrow A as shown in FIG. Then, the range E of the disk 21 is not exposed from the hole 222, and a region different from the range E is exposed from the hole 222.

  With the above configuration, when the backup time set by the backup time setting unit 11 is 24 hours, the disk 21 rotates 60 degrees every time the turntable 705 does not rotate reaches 4 hours. Therefore, for about 24 hours when the backup operation is not performed, the disk 21 rotates 60 degrees every 4 hours and rotates once every 24 hours.

  This prevents the dust from adhering only to a part of the surface of the disk 21 exposed from the hole 222 because the disk 21 remains stopped for 24 hours when the backup operation is not performed. Can do. Therefore, when the storage recording unit 7 tries to back up the audio data recorded in the main recording unit 6, it is possible to prevent the audio data from being backed up due to dust adhering to the surface of the disk 21. it can.

  In the recording / reproducing apparatus 1 of this embodiment, the control unit 5 automatically sets the time from when the spindle motor 706 stops until the spindle motor 706 is rotated by 60 degrees by setting the backup time by the backup time setting unit 11. Therefore, it is not necessary to set a time for rotating the disk 21 at predetermined time intervals. Thus, for example, when a recording / reproducing apparatus in which the user sets a time for rotating the disk 21 at predetermined time intervals is used, the disk 21 is changed even though the user has changed the backup time. Since the user forgets to change the time for rotation every predetermined time, it is possible to prevent dust from adhering to only a part of the surface of the disk 21 and making it impossible to back up audio data.

The perspective view which shows the external appearance of one Example of the recording / reproducing apparatus of this invention. The block diagram which shows the structure of one Example of the recording / reproducing apparatus of this invention. FIG. 3 is a diagram showing a configuration of a disk cartridge 20. The figure which shows the recording part 7 for a preservation | save of the recording / reproducing apparatus 1 which is one Example of this invention. The figure which shows the state which rotated the spindle motor 706 of the recording part 7 for preservation | save of the recording / reproducing apparatus 1 which is one Example of this invention. The block diagram which shows the conventional recording / reproducing apparatus. The figure which shows the conventional disc cartridge and optical disc drive.

Explanation of symbols

1 recording / playback device, 2 incoming call detection unit, 3 audio processing unit, 4 audio output unit,
5 control unit, 6 main recording unit, 7 storage recording unit, 701 mechanical base,
702 optical pickup, 703 magnetic head, 704 head drive unit,
705 turntable, 706 spindle motor,
707 Shutter opening / closing part, 8 detection part, 9 operation / display part,
10 clock part, 11 backup time setting part,
15 housing, 16 insertion slot,
20 disc cartridge, 21 disc, 211 center hole,
22 case part, 221 concave part, 222 hole, 223 hole,
23 Shutter, 100 Recording / playback device, 500 Control unit

Claims (1)

In a recording / reproducing apparatus in which a disk cartridge having a shutter for storing and opening / closing an optical disk is removable,
Shutter opening and closing means that opens the shutter in conjunction with the insertion of the disk cartridge and closes the shutter in conjunction with the ejection of the disk cartridge, a turntable that holds the center hole of the optical disk, a motor that rotates the turntable, and an external input A recording unit for recording the data to be recorded, a time output unit for outputting time information, a setting unit for setting a time for backing up the data recorded in the recording unit to the optical disc, and recording data on the optical disc or the optical disc And recording / reproducing means for reproducing data recorded in the recording unit, and control means for controlling rotation of the motor and control of the recording / reproducing means,
The control means rotates the turntable for each predetermined angle at which a portion exposed from the shutter of the optical disc does not overlap according to the backup time set by the setting means and the time information output by the time output means, A recording / reproducing apparatus, wherein the motor is controlled so that the turntable makes one rotation within a backup time.

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