JPH04263163A - Information recording and replay device - Google Patents

Abstract

PURPOSE:To prevent a malfunction on the basis of the erroneous output, of a sensor, which is output by the trouble of the sensor or the like which is installed inside an information recording and replay device. CONSTITUTION:When a power supply is turned on, an inside-the-device CPU 66 sends an instruction to a motor drive circuit 62 and turns a motor which is used to convey a disk cartridge in which a disk-shaped recording medium is housed. When the motor is turned, the output of a loading sensor 61 which detects the conveyance position of the disk cartridge or that of a switch, for write prohibition detection use, which judges whether information can be written into the disk-shaped recording medium or not is changed. When the output is different from an anticipated output, the inside-the-device CPU 60 judges that the loading sensor 61 or the switch 25b for write prohibition detection use is abnormal.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to an information recording/reproducing apparatus for recording and/or reproducing information on a disc-shaped recording medium, and in particular, the present invention relates to an information recording/reproducing apparatus that records and/or reproduces information on a disc-shaped recording medium, and in particular, when the power is turned off while the disc-shaped recording medium is inserted into the information recording/reproducing apparatus. The present invention relates to an information recording and reproducing device that prevents information on a disk-shaped recording medium from being rewritten or erased due to an erroneous signal when the power is turned on again.

0002

2. Description of the Related Art In recent years, disk-shaped recording media such as magnetic disks and magneto-optical disks have been widely used as media for recording information. These disc-shaped recording media are housed in a hard case (hereinafter referred to as a disc cartridge) to prevent the disc-shaped recording media from being damaged or soiled. An information recording/reproducing device is used when recording and/or reproducing information on a disk-shaped recording medium. When a disc cartridge is inserted, the information recording/reproducing device automatically transports the disc cartridge to a recording and/or reproducing area, opens a shutter provided on the disc cartridge, and closes the exposed part of the disc-shaped recording medium. Recording and/or reproducing information on a portion. The information recording/reproducing device has various types of devices that detect the format of the disc-shaped recording medium (for example, regulations on how to record on the disc-shaped recording medium and whether or not writing is possible) or the position of the cartridge holder that holds and transports the disc cartridge. sensors are installed. For example, as an example of providing a sensor for the format of a conventional disk-shaped recording medium, Japanese Patent Laid-Open No. 64-1151
There is something described in the No. As shown in FIG. 10, the disc cartridge used in the present invention has an openable and closable box on the back surface 91 that indicates the format of the disc cartridge 90 and indicates whether or not information can be written to the disc-shaped recording medium. A write-protection window 93 and identification marks 92 and 94 for identifying the recording method, recording capacity, etc. of the disc-shaped recording medium are provided. Therefore, by attaching a write-protection sensor that reads the write-protection window 93 and an identification mark sensor that reads the identification marks 92 and 94 to the information recording and reproducing apparatus, it is possible to select a device suitable for the recording method and recording capacity, and to record disc-shaped data. It is now possible to determine whether or not writing information to a medium is prohibited, and the above device is unable to read the differences in the recording method on the disk-shaped recording medium or the recording capacity of the disk-shaped recording medium. To prevent a user from accidentally rewriting or erasing information recorded on a disk-shaped recording medium.

0003

[Problem to be Solved by the Invention] However, if the above-mentioned write-protection sensor or the above-mentioned identification mark sensor malfunctions, an error in reading by these sensors may cause the write-protected disk-shaped recording medium in the disk cartridge to be damaged. Problems arise in that writing is determined to be permitted, or that a recording method or recording capacity different from the set recording method or recording capacity is selected. In addition, when a sensor fails, a problem arises in other sensors as well, such as malfunctions based on erroneous outputs due to the failure.

The present invention has been made to solve the above-mentioned problems, and is directed to various sensors that detect the format of a disk-shaped recording medium such as a write-protection sensor, or the position of a cartridge holder that holds a cartridge. It is an object of the present invention to provide an information recording and reproducing device that can determine failure and prevent malfunctions based on erroneous sensor outputs.

[0005]

[Means for Solving the Problems] In order to achieve the above-mentioned problems, the information recording and reproducing apparatus of the present invention includes a cartridge in which a disk-shaped recording medium is housed and is provided with an identification mark for identifying whether writing is possible or not. a position detection means for detecting the position of the holding member to be held; an identification mark detection means for detecting the identification mark; and an output of a detection signal of the position detection means or an output of a detection signal of the identification mark detection means. a moving means for moving the holding member to a position that provides a determined output when the position detecting means or the identification mark detecting means is operating normally; The present invention is characterized by comprising a determination means for determining whether the output of the detection signal of the position detection means or the output of the detection signal of the identification mark detection means represents the determined output.

[0006]

[Operation] The present invention uses the above means to convert the output of the detection signal of the position detecting means after the holding member is moved to the moving means or the output of the detection signal of the identification mark detecting means into the determined output. Since it is determined whether or not the above signal is represented, it is possible to prevent malfunctions due to the output of the above-mentioned signal being erroneous.

[0007]

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a partial perspective view of the external appearance of an information recording/reproducing apparatus and a disc cartridge according to an embodiment. Reference numeral 1 denotes an information recording/reproducing device which opens a shutter 6 attached to a disk cartridge 5 and records and/or reproduces information on a disk-shaped magneto-optical recording medium housed in the disk cartridge 5 . 2 is a cartridge insertion port, and the disk cartridge 5 is inserted from the cartridge insertion port 2 along the direction of arrow A. 3 is an eject button, and when this button is pressed, the disk cartridge 5 is ejected from the apparatus 1. Reference numeral 4 denotes a cold air intake port through which air for cooling the inside of the device 1 is taken in. 7 is a write-protection window, and its mechanism and role are similar to the write-protection window 93 of the disk cartridge 90 in FIG.

In FIG. 2, reference numeral 20 denotes a device base provided inside the device 1. As shown in FIG. The device base 20 includes a switch 25 provided near the cartridge insertion slot 2 to detect the state of the write-protection window 7 and the engagement of the disk-shaped storage medium with the spindle motor 22; a spindle motor 22 for rotating;
A movable pickup 24 that is provided behind the spindle motor 22 and is slidably engaged with a guide rail 23 and moves in the radial direction of a disk-shaped recording medium to record and/or reproduce information, a switch 25, and a spindle. A filter 21 is provided between the motor 22 and the movable pickup 24 to prevent dust from adhering to the spindle motor 22 and the movable pickup 24.

The switch 25 is connected to the disk cartridge 5.
It consists of a disk cartridge attachment detection switch 25a that detects the attachment of a disk cartridge into the device 1, and a write protection detection switch 25b that detects the state of the write protection window 7. Disk cartridge attachment detection switch 25
When the disk cartridge 5 is installed, the switch a is conductive and turned on; when it is not, the switch is opened and turned off. On the other hand, the write-protection detection switch 25b is turned on when the write-protection window 7 is closed. It is ON when it is prohibited, and it is OFF when it is permitted. Note that the write prohibition detection switch 25b always detects an ON state when the disk-shaped recording medium is not engaged with the spindle motor 22.

FIG. 3 shows an exploded view of a loading mechanism that is provided on the top of the device base 20 shown in FIG. FIG. 30 is a bias magnetic field holder, and X1 of the bias magnetic field holder 30
A bias magnetic field applying device 31 for applying a bias magnetic field to the disk-shaped recording medium is attached to the back side of the end in the direction (direction of insertion of the disk cartridge 3). Further, the bias magnetic field holder 30 is provided with two filters 33 at two locations corresponding to the upper part of the bias magnetic field applying device 31 for preventing the intrusion of dust. Furthermore, side walls bent vertically downward are formed at both the left and right ends of the bias magnetic field holder 30 in the Z direction, and two guide pins 32 are attached to each side of the bias magnetic field holder 30 and project inwardly at both ends of the side walls. has been done.

A cartridge holder 34 for holding the disk cartridge 5 is provided below the bias magnetic field holder 30.
is installed. A device (not shown) for opening and closing the shutter 4 is provided on the cartridge holder 34 . A window 35 for receiving the bias application device 31 is provided near the end of the upper surface of the cartridge holder 34 in the X1 direction. Side walls bent vertically downward are formed at both ends of the cartridge holder 34 in the Z direction, and a guide groove 36 for engaging the guide pin 32 of the bias magnetic field holder 30 is formed on one side of the side wall. They are set up in different locations. Furthermore, guide pins 37 protruding outward are provided at one location on each side at the central portion of the side wall in the X1 direction.

A member 55 is disposed below the cartridge holder 34. As shown in FIG. Details of member 55 are shown in FIG. In FIG. 4, 38 is a partition plate that partitions the loading mechanism, the spindle motor 22, and the movable pickup 24, and a drive plate 39 is placed on the upper surface of the partition plate 38. The drive plate 39 has three grooves cut in the X1 (or X2) direction, and the partition plate 39 is inserted into the grooves.
A pair of cartridge guide pins 40 provided near the ends of the partition plate 38 in the X2 direction engage with plate guide pins 41 provided near the ends of the partition plate 38 in the X1 direction, and the drive plate 39 It is movable in the X2) direction. The cartridge guide pin 40 also positions the disc cartridge 5 by engaging with a positioning hole (not shown) provided in the disc cartridge 5.

In the center of the partition plate 38, there is a substantially rectangular hole 42a through which the movable pickup 24 moves in the X1 (or X2) direction to record and/or reproduce information on the disc-shaped recording medium. A substantially circular hole 42b is provided which is continuous with the hole 42a and is used to engage the spindle motor 22 with the disk-shaped recording medium. Further, the center of both ends of the partition plate 38 in the Z direction is bent vertically upward, and a guide groove 49 is formed therein. The guide pin 37 of the cartridge holder 34 engages with the guide groove 49 .

A motor 43 rotatable in both directions and a rotating shaft (not shown) of the motor 43 are attached to the lower surface of the end of the partition plate 38 in the X2 direction. A worm gear 44 for transmitting data is attached. A substantially circular guide groove having a rotation center at a position different from the rotation center of the gear 45 is formed on the upper surface of the gear 45, and a guide groove provided near the end of the drive plate 39 in the X2 direction is formed in this guide groove. The protrusion 50 is engaged.

Further, magnets 51a and 5 are provided on the lower surface of the gear 45.
A magnet 51a is located at a position where 1b faces the lower surface of the gear 45.
, 51b is provided. The loading sensor includes a sensor that detects the position of the drive plate 39 when waiting for insertion of a disk cartridge, and a sensor that detects the position of the drive plate 39 while waiting for the insertion of a disk cartridge.
A sensor detects the position of the drive plate 39 when the side wall of the drive plate 39 comes into contact with the partition plate 38 and stops. The loading sensor separately outputs signals from these two sensors (the former being an eject position signal and the latter being a loading position signal). A magnetoelectric conversion element is used as the loading sensor.

Side walls bent vertically upward are formed at both ends of the drive plate 39 in the Z direction, and two guide grooves 48 are formed on one side of the side walls to engage the guide pins 32 of the bias magnetic field holder 30. They are set up in different locations. The guide groove 48 is inclined downward toward the X1 direction.

Near the end of the drive plate 39 in the X1 direction is a disk cartridge ejecting member 46 for ejecting the disk cartridge 5, and a disk cartridge ejecting member 46 located behind the disk cartridge ejecting member 46 for detecting insertion of the disk cartridge 5. An insertion switch 47 is provided. Although not shown, the disc cartridge ejection member 46 includes a contact member that contacts the tip of the disc cartridge 5, a spring that biases the contact member in the X2 direction, and a spring that urges the contact member in the X1 direction. and a position fixing member that fixes the contact member in a certain position when pressed. The insertion switch 47 is separated from the disc cartridge ejection member 46, but when the disc cartridge 5 is held in the cartridge holder 34, it is pushed by the cartridge ejection member 46 and turns on, and when it is not held, it turns off. The state will be as follows.

FIG. 5 is a block diagram showing the control system of the device 1. 60 is an in-device C provided in the above-mentioned device.
It is a PU (central processing unit). The in-device CPU 60 includes
A cartridge attachment detection switch 25a, a write protection detection switch 25b, and the loading sensor 61
, the insertion switch 47 , the eject button 3 , and the motor drive circuit 63 are connected via an interface circuit 64 . The CPU 60 in the device also connects to a CPU 63 (hereinafter referred to as an external host CPU) on the external host computer side of the device 1 via the interface circuit 64.
63). Furthermore, the in-device CP
The U60 has a built-in timer used for regulating the rotation time of the motor 43.

Next, the normal operation of the device 1 will be explained. The disk cartridge 5 is inserted into the cartridge insertion slot 2 of the device 1 with the side on which information is to be recorded and/or reproduced facing downward. The inserted disc cartridge 5 is inserted into the disc cartridge ejecting member 4 at its leading end.
6 and presses it in the X1 direction. When the abutment member of the disk cartridge ejection member 46 moves in the X1 direction and is fixed, the insertion switch 47 is turned on and transmits the signal to the CPU 60 in the apparatus.

Based on the signal, the CPU 60 in the device operates the motor drive circuit 63 to rotate the motor 43. The direction of rotation of the motor 43 is such that when the rotation of the motor 43 is transmitted to the gear 45 via the worm gear 44 and the gear 45 rotates, the protrusion 50 of the drive plate 39 engages with the engagement groove provided in the gear 45. The direction in which the moves in the X2 direction (
(hereinafter referred to as the loading direction).

As the drive plate 39 moves in the X2 direction, the guide groove 48 and the cartridge holder 3
Bias magnetic field holder 3 engaged with guide groove 36 of 4
Since the guide pin 32 of No. 0 moves downward along the guide groove 48, the bias magnetic field holder 30 descends. Also,
As the bias magnetic field holder 30 descends, the cartridge holder 34 also moves toward the partition plate 3 with which the guide pin 37 is engaged.
8 along the guide groove 49.

When the positioning hole of the disk cartridge 5 is engaged with the cartridge guide pin 40 and positioned, and the lower end of the side wall of the cartridge holder 34 holding the disk cartridge 5 comes into contact with the upper surface of the drive plate 39, the cartridge holder 34's descent stops. The bias magnetic field holder 30 further descends, and the lower end of the side wall of the bias magnetic field holder 30 comes into contact with the partition plate 38. At this time, the loading sensor 61 outputs a loading position signal, and in response to this signal, the CPU 60 in the device issues a command to the motor drive circuit 62 to stop the rotation of the motor 43.

[0023] With the above, the loading operation is completed.
Information can be recorded and/or reproduced on the disk-shaped recording medium. At this time, the CPU 60 in the device receives the ON signal from the cartridge attachment detection switch 25a, the ON or OFF signal from the write protection detection switch 25b depending on the state of the write protection window 7, and the loading position signal from the loading sensor 61. are input respectively.

Next, the ejecting operation when taking out the disk cartridge 5 from the apparatus 1 will be explained. When the eject button 3 is pressed, the signal is sent to the CPU 60 in the device. In response to this signal, the CPU 60 in the device operates the motor drive circuit 63 to rotate the motor 43 in the unloading direction (the opposite direction to the loading direction). The rotation of the motor 43 is transmitted to the gear 45 via the worm gear 44, whereby the protrusion 50 of the drive plate 39 engaged with the engagement groove of the gear 45 moves in the X1 direction.

As the drive plate 39 moves in the X1 direction, the bias magnetic field holder 30 and the cartridge holder 34 rise in this order. Then, when the signal of the loading sensor 61 outputs an eject position signal, the CPU 60 in the device receives the signal and the motor drive circuit 62
A command is issued to stop the rotation of the motor 43 in the unloading direction, and then the disk cartridge 5 is ejected by the disk cartridge ejecting member 46.

With the above steps, the ejecting operation is completed, and the disc cartridge 5 is placed in a waiting state for insertion. At this time, the in-device CPU 60 receives an OFF signal from the cartridge attachment detection switch 25a, an ON signal from the write protection detection switch 25b, and the loading sensor 61.
An eject position signal is input from each. The above is the normal operation of the device 1.

Next, the confirmation operation when the device 1 is powered on will be explained based on the flowcharts of FIGS. 6 and 7. When the power is turned on, the loading sensor 61
Then, a sensor check is performed to confirm the operation of the cartridge attachment detection switch 25a. First, the loading sensor 61 determines whether the eject position signal is being output.
The in-device CPU 60 makes the determination based on the output signal from. When the eject position signal is being output, sensor check 1 is performed and the confirmation operation is stopped.

Next, the cartridge attachment detection switch 2 determines whether the disk-shaped recording medium of the disk cartridge 5 is engaged with the spindle motor 22 or not.
The in-device CPU 60 makes the determination based on the output signal from 5a. When the disk-shaped recording medium is not engaged with the spindle motor 22, sensor check 2 is performed and the checking operation is stopped. Further, the in-device CPU 60 determines whether the signal outputs the loading position signal based on the output signal from the loading sensor 61. When it is determined that the load position signal is not output, sensor check 3 is performed and the confirmation operation is stopped.

When it is determined by each sensor that the disk-shaped recording medium is engaged with the spindle motor 22, the in-device CPU 60
Start the timer built into the 60 and set the time limit to 1 second. Next, the CPU 60 in the device operates the motor drive circuit 62 to rotate the motor 43 in the unloading direction. If the write prohibition detection switch 25b is turned on within the time limit, the CPU 60 in the device
issues a command to the motor drive circuit 62 to stop the rotation of the motor 43 in the unloading direction. Next, inside the device C
The PU 60 operates the motor drive circuit 62 to rotate the motor 43 in the loading direction, returning the disk cartridge 5 to the state in which the disk-shaped recording medium is engaged with the spindle motor 22 .

However, regardless of whether or not the write-protection window 7 of the disk cartridge 5 is in a write-protection state, if the write-protection detection switch 25b is not turned on within the above-mentioned time limit, the internal CPU
60 determines that the write inhibit detection switch 25b is abnormal. Then, the CPU 60 in the device runs on the external host side.
It transmits a write protect (write inhibit) signal to the PU 63 and also puts itself in a write protect state.

Furthermore, when the eject position signal is output, the CPU 60 in the device issues a command to the motor drive circuit 62 to stop the rotation of the motor 43 in the unloading direction. Subsequently, the disc cartridge 5 is ejected by the disc cartridge ejecting member 46.

Since the above operations are performed when the power is turned on, even if the power is turned off and then turned on again with the disk cartridge 5 still inserted in the apparatus 1, the CPU 6 in the apparatus
0 first unloads the disk cartridge 5, determines whether the write protection detection switch 25b operates normally, and if it is determined to be abnormal, sends a write protect signal to the external host side CPU 63. Since the data is transmitted and the data itself becomes write-protected, it is possible to prevent erroneous write operations and erase operations due to a failure of the write inhibit detection switch 25b.

Next, the operation of sensor check 1 will be explained based on the flowcharts of FIGS. 8 and 9. Descriptions of sensor check 2 and sensor check 3 will be omitted. When the in-device CPU 60 determines that an eject position signal is being output, the in-device CPU 60 next determines whether a load position signal is being output based on the output. When the load position signal is being output, the CPU 60 in the device is connected to the external host CPU.
It transmits to U63 that the sensor portion that outputs the loading position signal among the two sensors forming the loading sensor 61 is abnormal, and moves on to the next process.

Next, the in-device CPU 60 determines whether the signal of the write inhibit detection switch 25b is in the OFF state. When the OFF state is being output, the internal CPU 60 determines that the write inhibit detection switch 25b is abnormal. And the CPU inside the device
60 transmits a write protect signal to the CPU 63 on the external host side, puts itself in a write protect state, and moves on to the next process.

Next, the in-device CPU 60 is the in-device CP
The timer built in U60 is activated, the time limit is set to 1 second, the motor drive circuit 62 is activated, and the motor 43 is rotated in the loading direction. If the load position signal is output within the time limit, the CPU in the device
60 issues a command to the motor drive circuit 62 to stop the rotation of the motor 43 in the loading direction. Next, inside the device C
The PU 60 operates the motor drive circuit 62 to rotate the motor 43 in the unloading direction. When the eject position signal is output, the CPU 60 in the device issues a command to the motor drive circuit 62 to move the motor 4 in the unloading direction.
3 is stopped, and the cartridge holder 34 is placed in a state of waiting for insertion of the disk cartridge 5.

Loading sensor 61 within the above time limit
If the device does not output a load position signal, the CPU 60 in the device
determines that the sensor portion that outputs the loading position signal out of the two sensors forming the loading sensor 61 is abnormal, and transmits that fact to the CPU 63 on the external host side. Then, the in-device CPU 60 issues a command to the motor drive circuit 62 to stop the rotation of the motor 43 in the loading direction. Subsequently, the in-device CPU 60 operates the motor drive circuit 62 to rotate the motor 43 in the unloading direction. When the eject position signal is output, the CPU in the device
60 issues a command to the motor drive circuit 62 to stop the rotation of the motor 43 in the unloading direction, and places the cartridge holder 34 in a state of waiting for insertion of the disk cartridge 5.

By the above operation, the loading sensor 6
1 and the write protection detection switch 25b are determined to be normal or abnormal.

[0038]

According to the present invention, the output of the detection signal of the position detection means after the holding member is moved by the movement means or the output of the detection signal of the identification mark detection means is the determined output. Since it is determined whether or not the above signal is represented, it is possible to prevent malfunctions due to the output of the above-mentioned signal being erroneous.

[Brief explanation of the drawing]

FIG. 1 is a partial perspective view of the external appearance of an information recording/reproducing apparatus and a disc cartridge of the present invention.

FIG. 2 is a perspective view of a device base and a disk cartridge provided inside the information recording/reproducing device of the present invention.

FIG. 3 is an exploded perspective view of a loading mechanism provided on the top of the device base shown in FIG. 2;

4 is a perspective view showing details of the member 55 in FIG. 3. FIG.

FIG. 5 is a block diagram showing a control system of the loading mechanism.

FIG. 6 is a flowchart of a confirmation operation when the power is turned off and then turned on again with a disk cartridge still inserted.

FIG. 7 is a flowchart of a confirmation operation when the power is turned off and then turned on again with a disk cartridge still inserted.

8 is a flowchart of the operation of sensor check 1 in the flowcharts of the confirmation operation of FIGS. 6 and 7; FIG.

9 is a flowchart of the operation of sensor check 1 in the flowcharts of the confirmation operation of FIGS. 6 and 7; FIG.

FIG. 10 is a plan view of a conventional disk cartridge.

[Explanation of symbols]

5, 90 Disk cartridge 7, 93 Write-protect window 25a Disk cartridge installation detection switch 2
5b Write protection detection switch 43 Motor 45 Gear 50 Protrusions 51a, 51b Magnet 60 Internal CPU 61 Loading sensor 62 Motor drive circuit 63 External host CPU 92, 94 Identification mark

Claims (1)

[Claims] 1. Position detection means for detecting the position of a holding member that holds a cartridge in which a disk-shaped recording medium is housed and is provided with an identification mark for identifying whether writing is possible, and a means for detecting the identification mark. and the output of the detection signal of the position detection means or the output of the detection signal of the identification mark detection means is determined when the position detection means or the identification mark detection means are operating normally. A moving means for moving the holding member to a position where the holding member is output, and an output of a detection signal of the position detection means or an output of a detection signal of the identification mark detection means after the holding member is moved by the moving means. 1. An information recording and reproducing apparatus, comprising: determining means for determining whether or not the output represents a determined output.