WO2000060595A1

WO2000060595A1 - Disk cartridge and signal recording and reproducing device

Info

Publication number: WO2000060595A1
Application number: PCT/JP2000/001877
Authority: WO
Inventors: Hiroshi Nakashima; Shigeru Miki; Makoto Takahashi
Original assignee: Sanyo Electric Co., Ltd.
Priority date: 1999-03-30
Filing date: 2000-03-27
Publication date: 2000-10-12
Also published as: JP2000285628A

Abstract

A disk cartridge, wherein a plurality of erroneous erasing prevention holes (41, 42) are opened in a case (4), an erroneous erasing prevention block (5) capable of opening and closing these erroneous erasing prevention holes (41, 42) is stored in the case so that it can be operated to move and softly locked at a plurality of positions, and the erroneous erasing prevention block (5) is moved to each softly locked position to change the combination of the opening and closing conditions of the erroneous erasing prevention holes (41, 42) in order to set a plurality of erroneous erasing prevention modes of three or more, whereby the possibility of erroneously erasing important data can be eliminated.

Description

Description Disc cartridge and signal recording / reproducing device

The present invention relates to a disk cartridge accommodating a disk-shaped signal recording medium such as an optical disk, a magnetic disk, and a magneto-optical disk, and a signal recording / reproducing apparatus for recording and reproducing a signal for such a disk cartridge. It is. Background art

Conventionally, in this type of disk cartridge, a single erasure prevention hole is opened in the case containing the disk, and an erasure prevention piece that can open and close the erasure prevention hole can be moved. In the signal recording / reproducing device, the entire area including the recorded area and the unrecorded area of the disc is moved by moving the erroneous erasure prevention frame and switching the erroneous erasure prevention hole between the open state and the closed state. An all-erasable mode in which data can be erased for an area and an all-erasable mode in which data cannot be erased for the entire area of the disk are set.

Therefore, when recording new data on the disc, set the all erasure mode and record the data. However, when important non-erasable data is recorded on the disc, set the all erasure impossible mode. Save the disk cartridge. Therefore, there is no danger of erasing important data by mistake.

By the way, important data that cannot be erased and non-erasable data that are erasable are mixedly recorded on the disc, and there are cases where there is no unrecorded area where no data is recorded. When recording new data on such a disc, set all erasable mode, select erasable insignificant data, and save the data. Once erased, write new data.

Also, important data that cannot be erased and non-erasable data that are erasable are mixedly recorded on the disc, and the data recorded before a certain point in time is important and cannot be erased, but at some point If the data recorded thereafter is not important and can be erased, when recording new data on such a disc, set the all-erasable mode and select the erasable non-essential data. After erasing the data, new data is written.

However, when the user selects and erases insignificant data in the all-erasable mode as described above, there is a risk that important data will be 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 apparatus which do not have a risk of erroneously erasing important data. Disclosure of the invention

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 the erroneous erasure prevention holes (41) and (42) can be opened and closed. Possible erasure prevention pieces (7) are accommodated so that they can be moved and softly locked at a plurality of positions. By changing the combination of the open / close states of the prevention holes (41) and (42), it is possible to set three or more erroneous erasure prevention modes.

Therefore, the conventional all-erasable mode is adopted as one erasure prevention mode, the conventional all-erasable mode is adopted as another erasure prevention mode, and the other erasure prevention mode is adopted as another one. A selective erasable mode can be adopted in which important data recorded on the disk of the disk cartridge cannot be erased, and non-important data can be erased.

This greatly reduces the risk of accidentally erasing important data.

The signal recording / reproducing apparatus according to the present invention is directed to the disk cartridge of the present invention. In addition, detection means for detecting the open / close state of each of the erroneous erasure prevention holes (41) and (42) is provided opposite to the disk cartridge (1). Depending on the result, three or more multiple erasure prevention modes 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 is automatically set. Can be done.

Specifically, as one of a plurality of erroneous erasure prevention modes, a mode is set in which a recorded area of a disc is not erasable and an unrecorded area is erasable. Here, the boundary between the recorded area and the unrecorded area can be the time when the disc cartridge is ejected from the signal recording / reproducing apparatus, or the recording end position when the power of the signal recording / reproducing apparatus is turned off. Thus, erroneous erasure of data recorded before the recording end position can be reliably prevented, and new data can be recorded 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 disc can be erased and an unrecorded area cannot be erased. Here, the boundary between the recorded area and the unrecorded area can be the time when the disc cartridge is ejected from the signal recording / reproducing device, or 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. This makes it impossible to record new data in an area where data was recorded before a certain point in time, and to record new data in an area where data was recorded after that point. Can be made possible. 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. By selecting an appropriate erasure prevention mode from among these, important data can be set. The risk of erroneous erasure can be reliably avoided. BRIEF DESCRIPTION OF THE FIGURES

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 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 the disk cartridge according to the present invention.

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

FIGS. 7 (a) and 7 (b) are a rear view and a side view of the erroneous erasure prevention piece, respectively.

FIGS. 8 (a) and 8 (b) are a plan view and a rear view, respectively, showing a cross-sectional structure of a main part of the case.

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

FIG. 10 is a block diagram illustrating a configuration of a digital still camera according to the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

First, the gist of the disk cartridge according to the present invention will be described with reference to FIGS. The disk cartridge (1) shown in FIG. 1 includes a shutter (3) in a case (4), and a first erroneous erasure prevention hole (41) and a second hole at the end opposite to the mounting position of the shutter (3). (2) The erroneous erasure prevention holes (42) are opened, and the erroneous erasure prevention pieces (5) for opening and closing the erroneous erasure prevention holes (41) and (42) are mounted so as to be able to reciprocate on a straight line. As shown in Fig. 2, by moving the erroneous erasure prevention piece (5) and changing the combination of the open / close states of the erasure prevention holes (41) and (42), four erasure prevention modes ① to 設定 are set. Is possible.

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. The second erasure prevention mode た with both erasure prevention holes (41) and (42) closed, the second erasure prevention hole (41) closed while the second erasure prevention hole (42) was opened. (3) The erroneous erasure prevention mode (3) and the fourth erroneous erasure prevention mode (2) in which both the erasure prevention holes (41) and (42) are opened are sequentially set. In the disk cartridge (1) shown in FIG. 3, the first erroneous erasure prevention hole (41) and the second erroneous erasure prevention hole (42) are provided at the end opposite to the mounting position of the shutter (3). Erroneous erasure prevention pieces (6) for opening and closing the erroneous erasure prevention pieces (6) are mounted so as to be able to reciprocate on an arc line, and as shown in FIG. ) By changing the combination of the open / closed state of (42), it is possible to set four erroneous erasure prevention modes ① to ④.

That is, by rotating the erroneous erasure prevention piece (6) in one direction, the second erasure prevention hole (42) is closed, while the first erasure prevention hole (41) is opened. Mode (1), both erasure prevention holes (41) and (42) are closed.Second erasure prevention mode (2), first erasure prevention hole (41) is closed, and second erasure prevention hole (42) is opened. The third erasure prevention mode ③ and the fourth erasure prevention mode た with the erasure prevention holes (41) and (42) opened are sequentially set. Next, a specific configuration in a case where the present invention is applied to a disk cartridge accommodating 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. I do. As shown in FIGS. 5 and 6, the case (4) of the disk cartridge (1) contains a magneto-optical disk D, and has an 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 of the case (4), and these erroneous erasure prevention holes (41) and (42) are opened and closed. Erase prevention piece (7) is rotatably housed. The case (4) of the disc cartridge (1) has 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 and a tip end of the arm (71). And a shield (72) that is bent and protruded from the control panel. An operation piece (74) is protruded from a base end of the shield (72), and a convex portion is provided on an outer side surface of the shield (72). A part (73) is protruded.

The shielding portion (72) of the erroneous erasure prevention piece (7) has a size that allows both the erasure prevention holes (41) and (42) to be closed at the same time. 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 8 (b), the circular hole (75) of the erroneous erasure prevention piece (7) is located at the center of curvature of the circular hole (43). A boss (44) to be 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). The guide wall (45) has a circular hole in the boss (44). The erroneous erasure prevention piece (7) fitted with (75) comes into sliding contact with the side surface of the shielding portion (72). The guide wall (45) has four recesses (46), (47), (48), and (49) that can be engaged with the projections (73) of the erroneous erasure prevention piece (7). Thus, the erroneous erasure prevention piece (7) can be softly locked in four rotation postures.

In the present 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 prevention piece (7) with the second concave portion (47) of the guide wall (45), the first erroneous erasure prevention mode 実現 is realized. ) Is engaged with the third concave portion (48) to realize the second erroneous erasure prevention mode 、, The third erroneous erasure prevention mode ③ 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 the fourth erroneous erasure prevention mode, and another mode setting is performed. It is also possible.

As shown in FIGS. 9 (a) and (b), in the first erasure prevention mode ①, the second erasure prevention hole (42) is closed by the erasure prevention piece (7), while the first erasure prevention Hole (41) is opened. In the second erasure prevention mode II, both the first erasure prevention hole (41) and the second erasure prevention hole (42) are closed. In the third erroneous erasure prevention mode ③, the second erroneous erasure prevention hole (42) 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 erasure prevention mode is an all erasable mode in which the entire area of the disk of the disk cartridge (1) can be erased. The second erasure prevention mode II is that the entire area of the disk cannot be erased. The third erroneous erasure prevention mode ③ is a selective erasable mode in which the recorded area of the disc cannot be erased and the unrecorded area can be erased. Here, the boundary between the recorded area and the unrecorded area is set at the time when the disc cartridge is ejected or when the power of the digital still camera is turned off.

FIG. 10 shows the configuration of a digital still camera that records and reproduces video data for the disk cartridge (1). A magnetic head (11) and an optical head (12) are provided on both sides of a disk cartridge (1) driven to rotate by a spindle motor (27). Also, facing the disk cartridge (1), an erroneous erasure prevention hole detection switch (10) for detecting the open / close state of the first erroneous erasure prevention hole (41) and the second erroneous erasure prevention hole (42). Has been deployed.

The rotation speed of the spindle motor (27) is controlled by a disk rotation control circuit (17). A recording circuit (20) and an erasing circuit (18) are connected to the magnetic head (11). Recording and erasing of signals with respect to the cartridge (1) are performed. A reproducing circuit (19) is connected to the optical head (12) to reproduce a signal. 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 signals. You.

The disk rotation control circuit (17), erasing circuit (18), reproducing circuit (19), and recording circuit (2

0) is connected to a main control circuit (13) composed of a microcomputer via a data bus (16), and the circuit operation is controlled by the main control circuit (13). The data bus (16) is connected to a signal compression circuit (15) for compressing video signals and a DRAM (14) for storing video signals.

Further, a liquid crystal display (22) is connected to the data bus (16) via an NTSSC controller (26). Further, it is connected to a data bus (16) via an imaging device power AD converter (24) comprising an optical system (2) and a CCD (23) and a signal processing circuit (25).

In the above digital still camera, the first erroneous erasure prevention hole (41) and the second erroneous erasure prevention hole (42) opened in the disc cartridge (1) by the erroneous erasure prevention hole detection switch (10). Open / close state is detected, and the detection signal is applied to the erroneous erase mode detection circuit (2

1), the three erroneous erasure modes are determined, and an erroneous erasure prevention mode detection signal is generated. The signal erasing operation by the erasing circuit (18) and the signal recording operation by the recording circuit (20) are controlled based on the erroneous erasing mode detection signal.

In other words, in the first erroneous erasure prevention mode II, erasing of recorded data and writing of new data are prohibited in all areas of the disk of the disk drive (1), and important data recorded on the disk is Is prevented from being erroneously erased.

In the second erroneous erasure prevention mode II, erasing of recorded data and writing of new data are allowed in all areas of the disk, and erasing of unnecessary data and recording of new data are performed.

In the _third erroneous erasure prevention mode (3), the disc cartridge is ejected. Deletion of previously recorded data is prohibited, but if the disc cartridge is reloaded after ejection, subsequent deletion of recorded data is allowed, and new data can be recorded. In this third erroneous erasure prevention mode ③, for example, images taken the day before are important and cannot be erased, but images taken today can be erased until the final shooting is completed. This mode is effective when the recorded image remaining at that time is regarded as having high importance due to the eject or power-off after completion, and subsequent erasure is prohibited.

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 possible to set a mode in which only data that satisfies the conditions set by the user can be erased. In this case, as the conditions set by the user, it is possible to employ the recording data management information (TOC information) recorded on the disc and the condition relating to the date. This makes it impossible to erase data recorded within a certain period, for example, thereby preventing erroneous erasure.

Claims

The scope of the claims

1. In a disk cartridge in which a disk serving as a signal recording medium is rotatably housed in a flat case, the case (4) is provided with a plurality of erroneous erasure prevention holes (41) and (42). Erroneous erasure prevention pieces (7) capable of opening and closing these erroneous erasure prevention holes (41) and (42) are accommodated so as to be movable and softly locked at a plurality of positions. By moving (7) to each soft locking position and changing the combination of the open / closed state of each erroneous erasure prevention hole (41), (42), three or more multiple erroneous erasure prevention modes can be set. A disk cartridge, characterized by being provided.

2. In a signal recording / 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, a case (4) of a disk cartridge (1) At the same time, a plurality of erasure prevention holes (41) and (42) are opened, and an erasure prevention piece (7) which can open and close these erasure prevention holes (41) and (42) is moved. The erroneous erasure prevention piece (7) is moved to each soft engagement position by being operable and housed in multiple positions so that it can be softly locked, and the open / close state of each erasure prevention hole (4 1) (42) A detection means for detecting the open / close state of each of the erroneous erasure prevention holes (41) and (42) is provided opposite to the disk force cartridge (1), and the detection result is provided. A plurality of erroneous erasure prevention modes of three or more are set according to the No. recording and reproducing device.

3. The signal recording according to claim 2, wherein a mode is set as one of a plurality of erroneous erasure prevention modes in which a recorded area of a disc is erasable and an unrecorded area is erasable. Playback device.

4. The signal recording according to claim 2, wherein a mode in which a recorded area of the disc is erasable and an unrecorded area is not erasable is set as one of a plurality of erroneous erasure prevention modes. Playback device.

5. As one of the multiple erasure prevention modes, data that satisfies the conditions set by the user 5. The signal recording / reproducing apparatus according to claim 2, wherein a mode in which only data 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.