JP2000285628A - Disk cartridge and signal recording/reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the possibility of mistakingly deleting important data. SOLUTION: In this disk cartridge 1, plural erroneous deletion prevention holes 41 and 42 are bored in a case 4, and an erroneous deletion prevention piece 5 for opening/closing the erroneous deletion prevention holes 41 and 42 is housed in plural positions to be moved and to be softly locked, and by changing the combination of the opening/closing states of the erroneous deletion prevention holes 41 and 42, three or more plural erroneous deletion prevention modes are set.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk cartridge containing a disk-shaped signal recording medium such as an optical disk, a magnetic disk, and a magneto-optical disk, and a signal for recording and reproducing a signal for such a disk cartridge. The present invention relates to a recording / reproducing device.

[0002]

2. Description of the Related Art Conventionally, in a disk cartridge of this type, a single erroneous erasure prevention hole is opened in a case accommodating a disk, and an erroneous erasure prevention capable of opening and closing the erasure prevention hole. In the signal recording / reproducing apparatus, the recording area and the unrecorded area of the disc are accommodated by moving the frame for erroneous erasure prevention and switching between the open state and the closed state by moving the erroneous erasure prevention hole. An all-erasable mode in which data can be erased in all areas including the area and an all-erasable mode in which data cannot be erased in all areas of the disk are set.

Therefore, when new data is recorded on the disk, the all erasure mode is set and data is recorded. When important data that cannot be erased is recorded on the disk, the all erasure impossible mode is set. Set and save the disk cartridge. Therefore, there is no danger of erroneously erasing important data.

[0004]

On the disk, important data that cannot be erased and non-essential data that can be erased are recorded in a mixed manner, and an unrecorded area where no data is recorded is recorded. When recording new data on such a disc, there is a case where no data remains. After setting the all erasable mode, select erasable insignificant data, and delete the data once. , Writing new data. In addition, important data which cannot be erased and non-erasable data which can be erased are recorded on the disc in a mixed manner. Data recorded before a certain point in time is important and cannot be erased. Record data is not important,
When erasing is possible, when recording new data on such a disc, set the all-erasable mode,
Erasable insignificant data is selected, and after the data is once erased, new data is written.

However, when the user selects and erases non-important data in the all-erasable mode as described above, there is a risk that important data is erased due to an erroneous operation. SUMMARY OF THE INVENTION It is an object of the present invention to provide a disk cartridge and a signal recording / reproducing device which are free from erroneous erasure of important data.

[0006]

In the disk cartridge according to the present invention, the case (4) is provided with a plurality of erroneous erasure prevention holes (41) and (42), and these erroneous erasure prevention holes are provided.
(41) An erasure prevention piece (7) that can open and close (42)
It is accommodated so as to be movable and can be softly locked at a plurality of positions, and the erroneous erasure prevention piece (7) is moved to each soft locking position,
By changing the combination of the open / close states of the erroneous erasure prevention holes (41) and (42), three or more erroneous erasure prevention modes can be set.

Therefore, a conventional all-erasable mode is adopted as one erroneous erasure prevention mode, a conventional all-erasable mode is adopted as another erroneous erasure prevention mode, and another erroneous erasure prevention mode is adopted. As the mode, a selective erasable mode in which important data recorded on the disk of the disk cartridge cannot be erased and non-important data can be erased can be employed. This greatly reduces the risk of erroneous erasure of important data.

A signal recording / reproducing apparatus according to the present invention performs signal recording and reproduction on the disk cartridge of the present invention.
Opposite to (1), detection means for detecting the open / closed state of each of the erroneous erasure prevention holes (41) and (42) is provided.
The plurality of erroneous erasure prevention modes described above are set.

Therefore, by supplying the detection signal from the detection means to a circuit for erasing and recording the signal,
For example, the above-described all erasable mode, all erasable mode, or selective erasable mode can be automatically set.

Specifically, one of a plurality of erroneous erasure prevention modes is set.
First, the recorded area of the disc cannot be erased,
In addition, a mode in which the unrecorded area can be erased is set. Here, the boundary between the recorded area and the unrecorded area can be a recording end position when the disc cartridge is ejected from the signal recording / reproducing apparatus or when the power of the signal recording / reproducing apparatus is turned off. by this,
It is possible to reliably prevent erroneous erasure of data recorded before the recording end position and to record new data in an unrecorded area.

As one of a plurality of erroneous erasure prevention modes, a mode is set in which a recorded area of a disk can be erased and an unrecorded area cannot be erased. Here, the boundary between the recorded area and the unrecorded area is determined when the disc cartridge is ejected from the signal recording / reproducing device,
Alternatively, it can be the recording end position when the power of the signal recording / reproducing device is turned off. This makes it possible to record new data in a data recording area before the recording end position.

Further, as one of a plurality of erroneous erasure prevention modes, a mode is set in which only data satisfying a condition set by a user can be erased. Here, as the condition set by the user, a condition relating to recording data management information recorded on the disk of the disk cartridge (1) can be adopted. Thereby, for example, new data cannot be recorded in an area where data is recorded before a certain point in time, and new data can be recorded in an area where data is recorded thereafter. I can do it.

[0013]

According to the disk cartridge and the signal recording / reproducing apparatus of the present invention, three or more erroneous erasure prevention modes can be set. Thus, the danger of erroneously erasing important data can be reliably avoided.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the gist of a disk cartridge according to the present invention will be described with reference to FIGS. The disk cartridge (1) shown in FIG.
A shutter (3) is provided in (4), and a first erroneous erasure prevention hole (41) and a second erroneous erasure prevention hole (42) are opened at the end opposite to the mounting position of the shutter (3). In addition, an erasure prevention piece (5) for opening and closing these erasure prevention holes (41) and (42) is attached so as to be able to reciprocate on a straight line, as shown in FIG. ) To move each erasure prevention hole (4
1) By changing the combination of the open / close states of (42), four erroneous erasure prevention modes can be set.

That is, by moving the erroneous erasure prevention piece (5) in one direction, the second erroneous erasure prevention hole (42) is closed, while the first erroneous erasure prevention hole (41) is opened. Prevention mode, the second erasure prevention mode in which both erasure prevention holes (41) and (42) are closed, and the second erasure prevention mode in which the first erasure prevention hole (41) is closed and the second erasure prevention hole (42) is opened. The third erroneous erasure prevention mode and the fourth erroneous erasure prevention mode in which both the erroneous erasure prevention holes (41) and (42) are opened are sequentially set.

A disk cartridge (1) shown in FIG.
At the end opposite to the mounting position of the shutter (3), a first erroneous erasure prevention hole (41) and a second erroneous erasure prevention hole are provided.
An erroneous erasure prevention piece (6) for opening and closing (42) is mounted so as to be reciprocable on an arc line, and as shown in FIG. 4, the erroneous erasure prevention piece (6) is rotated to prevent each erroneous erasure prevention. By changing the combination of the open / close states of the holes (41) and (42), four erroneous erasure prevention modes can be set.

That is, the second erroneous erasure prevention hole (42) is closed by rotating the erroneous erasure prevention piece (6) in one direction, and the first erroneous erasure prevention hole (41) is opened. The erroneous erasure prevention mode, the second erroneous erasure prevention mode in which both erasure prevention holes (41) and (42) are closed, and the second
A third erroneous erasure prevention mode in which the erroneous erasure prevention holes (42) are opened and a fourth erroneous erasure prevention mode in which the erroneous erasure prevention holes (41) and (42) are opened are sequentially set.

Next, the specific structure of the present invention applied to a disk cartridge containing a magneto-optical disk and a digital still camera using the disk cartridge as a recording medium will be described in detail with reference to FIGS. Will be described.
As shown in FIGS. 5 and 6, a magneto-optical disk D is housed in a case (4) of the disk cartridge (1).
At the end opposite to the mounting position of the shutter (3),
A first erroneous erasure prevention hole (41) and a second erroneous erasure prevention hole (42) are opened on the back surface of the case (4), and the first and second erasure prevention holes (41) and (42) are opened and closed. Erase prevention piece (7)
Are rotatably accommodated. The case (4) of the disc cartridge (1) is provided with an arc-shaped hole (43) opened on the surface of the case (4) to expose the tip of the erroneous erasure prevention piece (7). .

As shown in FIGS. 7 (a) and 7 (b), the erroneous erasure prevention piece (7) has an arm (71) having a circular hole (75) at the base end thereof.
A shield (7) that bends and projects from the tip of the arm (71)
2), the operation piece (74) is protruded from the base end of the shielding part (72), and the convex part (73) is protruded from the outer side surface of the shielding part (72). . The shielding portion (72) of the erroneous erasure prevention piece (7) has a size that can simultaneously close both the erroneous erasure prevention holes (41) and (42). Further, the operation piece (74) protrudes from the arc hole (43) of the case (4) shown in FIG. 5, so that the erroneous erasure prevention piece (7) can be rotated.

On the other hand, in the case (4), as shown in FIGS. 8 (a) and (b), the circular hole (75) of the erroneous erasure prevention piece (7) is positioned at the center of curvature of the circular hole (43). A boss (44) into which the boss is fitted is formed. A guide wall (45) formed of a cylindrical surface centered on the boss (44) is formed on the inner surface of the case (4), and the guide wall (45) has a circular hole ( The erroneous erasure prevention piece (7) fitted with (75) comes into sliding contact with the side surface of the shielding portion (72). On the guide wall (45), the projection (73) of the erroneous erasure prevention piece (7)
Are formed with four recesses (46), (47), (48), and (49) that allow the erroneous erasure prevention piece (7) to be softly locked in four rotational positions. It is. In this embodiment, three erroneous erasure prevention modes are realized by switching among the three soft locking positions.

That is, by engaging the convex portion (73) of the erroneous erasure preventing piece (7) with the second concave portion (47) of the guide wall (45), the first portion is formed.
The erroneous erasure prevention mode is realized, and the projection (73) is replaced with the third depression (48)
The third erroneous erasure prevention mode is realized by engaging the convex portion (73) with the fourth concave portion (49). It is to be noted that the state in which the convex portion (73) of the erroneous erasure prevention piece (7) is engaged with the first concave portion (46) of the guide wall (45) is set as a fourth erroneous erasure prevention mode and another mode setting is performed. Is also possible.

As shown in FIGS. 9A and 9B, in the first erasure prevention mode, the second erasure prevention hole (42) is closed by the erasure prevention frame (7), while the first erasure prevention is performed. The prevention hole (41) is opened. In the second erasure prevention mode, both the first erasure prevention hole (41) and the second erasure prevention hole (42) are closed.
In the third erasure prevention mode, the second erasure prevention hole (4
2) is opened, while the first erroneous erasure prevention hole (41) is closed. The operation of each of the following modes can be realized by optically or mechanically detecting and discriminating the open / closed state of the erroneous erasure prevention holes (41) and (42).

The first erroneous erasure prevention mode is an all erasable mode in which the entire area of the disk of the disk cartridge (1) is erasable, and the second erroneous erasure prevention mode is that the entire area of the disk is unerasable. The third erasure prevention mode is a selective erasable mode in which a recorded area of a disk is erasable and an unrecorded area is erasable. Here, the boundary between the recorded area and the unrecorded area is set at the time when the disk cartridge is ejected or the recording end position when the power of the digital still camera is turned off.

FIG. 10 shows the disk cartridge (1).
1 shows a configuration of a digital still camera that records and reproduces video data. Disk cartridge rotated by spindle motor (27)
On both sides of (1), a magnetic head (11) and an optical head (12) are provided. Further, the first erroneous erasure prevention hole (41) and the second erroneous erasure prevention hole described above are opposed to the disk cartridge (1).
An erasure prevention hole detection switch (10) for detecting the open / close state of (42) is provided.

The rotation speed of the spindle motor (27) is controlled by a disk rotation control circuit (17). Magnetic head (1
A recording circuit (20) and an erasing circuit (18) are connected to (1) to record and erase signals on the disk cartridge (1). A reproduction circuit (19) is connected to the optical head (12) to reproduce a signal. Further, the erroneous erasure prevention hole detection switch (10) is connected to the erasure circuit (18) and the recording circuit (20) via the erroneous erasure mode detection circuit (21) to control the erasure and recording of the signal. .

The disk rotation control circuit (17) and the erasing circuit
(18), the reproduction circuit (19) and the recording circuit (20) are connected to the data bus (1
6) through the main control circuit consisting of microcomputer
(13), and the circuit operation is controlled by the main control circuit (13). Further, a signal compression circuit (15) for compressing a video signal and a DRAM (14) for storing a video signal are connected to the data bus (16). Further, a liquid crystal display (22) is connected to the data bus (16) via an NTSC controller (26). Optical system (2)
And an imaging device comprising a CCD (23) is connected to a data bus (16) via an AD converter (24) and a signal processing circuit (25).

In the digital still camera, the first erroneous erasure prevention hole (41) and the second erroneous erasure prevention hole (42) opened in the disc cartridge (1) are operated by the erroneous erasure prevention hole detection switch (10). Is detected, and the detection signal is supplied to an erroneous erasure mode detection circuit (21) to determine three erroneous erasure modes, thereby generating an erroneous erasure prevention mode detection signal. Then, based on the erroneous erase mode detection signal, a signal erase operation by the erase circuit (18) and the recording circuit (2
0) is controlled.

That is, in the first erroneous erasure prevention mode, the erasure of recorded data and the writing of new data are prohibited for the entire area of the disk of the disk cartridge (1), and important data recorded on the disk is protected. Erroneous erasure is prevented. In the second erroneous erasure prevention mode, erasing of recorded data and writing of new data are permitted in all areas of the disk, and erasing of unnecessary data and recording of new data are performed. Further, in the third erroneous erasure prevention mode, erasure of data recorded before ejecting the disk cartridge is prohibited. However, when the disk cartridge is mounted again after the ejection, erasure of the recorded data thereafter is allowed, and Data can be recorded. In the third erroneous erasure prevention mode, for example, an image taken on the previous day is important and cannot be erased. However, for today's photographed image, erasing is possible until the final shooting is completed. When the ejected image or the power is turned off, the recorded image remaining at that time is regarded as having high importance, and the subsequent erasure is prohibited, the mode becomes effective.

The configuration of each part of the present invention is not limited to the above embodiment, and various modifications can be made within the technical scope described in the claims. For example, as one of the erroneous erasure prevention modes, it is also possible to set a mode in which only data satisfying the conditions set by the user can be erased. In this case, as the conditions set by the user, it is possible to employ recording data management information (TOC information) recorded on the disc and conditions relating to the date. Thus, for example, erasure of data recorded within a certain period is not allowed, and erroneous erasure can be prevented.

[Brief description of the drawings]

FIG. 1 is a plan view of a disk cartridge according to the present invention.

FIG. 2 is a diagram for explaining switching between four erroneous erasure prevention modes in the disk cartridge.

FIG. 3 is a plan view of another disk cartridge according to the present invention.

FIG. 4 is a diagram for explaining switching between four erroneous erasure prevention modes in the disk cartridge.

FIG. 5 is a plan view showing a specific structure of a disk cartridge according to the present invention.

FIG. 6 is a rear view of the disk cartridge.

FIG. 7 is a rear view (a) and a side view (b) of the erroneous erasure prevention piece.

FIG. 8 is a plan view showing a cross-sectional structure of a main part of the case.
(a) and a rear view (b).

FIGS. 9A and 9B are a series of plan views (a) and rear views (b) showing states of the erroneous erasure prevention hole and the erroneous erasure prevention frame in three erroneous erasure prevention modes.

FIG. 10 is a block diagram illustrating a configuration of a digital still camera according to the present invention.

[Explanation of symbols]

 (1) Disk cartridge (4) Case (41) First erasure prevention hole (42) Second erasure prevention hole (5) Erase erasure prevention piece (6) Erase erasure prevention piece (7) Erase erasure prevention piece

Claims (6)

[Claims] In a disk cartridge in which a disk serving as a signal recording medium is rotatably accommodated in a flat case, the case (4) has a plurality of erroneous erasure prevention holes (41).
(42) is opened and these erroneous erasure prevention holes (41) (4
An erroneous erasure prevention piece (7) capable of opening and closing 2) is housed so as to be movable and softly locked at a plurality of positions,
By moving the erroneous erasure prevention piece (7) to each soft locking position and changing the combination of the open / close states of the erroneous erasure prevention holes (41) and (42), setting of three or more multiple erasure prevention modes. A disk cartridge characterized by being able to perform. 2. A signal recording and reproducing apparatus for recording and reproducing signals for a disk cartridge in which a disk serving as a signal recording medium is rotatably housed in a flat case.
In (4), a plurality of erroneous erasure prevention holes (41) and (42) are opened, and the erroneous erasure prevention pieces (7) capable of opening and closing these erasure prevention holes (41) and (42). Are movably accommodated and accommodated in a plurality of positions so that they can be softly locked. The erroneous erasure prevention piece (7) is moved to each soft locking position, and each of the erroneous erasure prevention holes (41) and (42) is closed. It is possible to change the combination of the open / close states, and each erasure prevention hole (41) (4) faces the disk cartridge (1).
2) A signal recording / reproducing apparatus, wherein a detecting means for detecting the open / close state is provided, and three or more erroneous erasure prevention modes are set according to a result of the detection. 3. One of a plurality of erroneous erasure prevention modes,
3. The signal recording / reproducing apparatus according to claim 2, wherein a mode is set such that a recorded area of the disc cannot be erased and an unrecorded area can be erased. 4. One of a plurality of erasure prevention modes,
3. The signal recording / reproducing apparatus according to claim 2, wherein a mode is set such that a recorded area of the disc can be erased and an unrecorded area cannot be erased. 5. As one of a plurality of erroneous erasure prevention modes,
5. The signal recording / reproducing apparatus according to claim 2, wherein a mode in which only data satisfying a condition set by a user can be erased is set. 6. The signal recording / reproducing apparatus according to claim 5, wherein a condition relating to recording data management information recorded on a disk of the disk cartridge (1) is adopted as a condition set by a user.