JP3257557B2 - Recording and / or playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording and / or reproducing apparatus in which a disk cartridge containing a disk such as a magnetic disk or an optical disk used as a recording medium for information signals is mounted.

[0002]

2. Description of the Related Art Conventionally, a disk such as a magnetic disk or an optical disk used as a recording medium for an information signal can accurately record and reproduce the information signal if dust adheres or is scratched on a signal recording surface. I can no longer do. Therefore, a disc used as a recording medium prevents dust from adhering to or scratching the signal recording surface, and furthermore, allows easy attachment and detachment to a storage device and a recording and / or reproducing device. It is housed in a cartridge body and configured as a disk cartridge.

[0003] As this kind of disk cartridge, one configured as shown in FIGS. 10 and 11 has been proposed. The disk cartridge shown in FIGS. 10 and 11 has a cartridge body 102 having a rectangular shape, and a disk 101 is rotatably stored in the cartridge body 102. As shown in FIG. 11, the cartridge main body 102
The recording and / or reproducing openings 103, 103 are provided so that at least a part of the signal recording surface of the disk 101 accommodated in the disk 101 faces outward over the inner and outer peripheries. these,
The openings 103, 103 are provided at opposing positions of the cartridge main body 102, and from the vicinity of the center of the cartridge main body 102, the first side surface 10 of the cartridge main body 102.
It is formed in a substantially rectangular shape over the vicinity of 2a.

[0004] The cartridge body 102 has a recording and / or
Alternatively, a shutter member 104 for opening and closing the reproduction openings 103, 103 is attached. Shutter member 104
Is formed by punching and bending a thin metal plate or forming a synthetic resin so as to have a U-shaped cross section, and a connecting piece 10 along the first side surface 102a of the cartridge body 102.
8 and a pair of shutter portions 105, 105 extending from both sides of the connecting piece 108 so as to face each other and extending on each plane of the cartridge body 102. These shutter portions 105 have openings 10 for recording and / or reproduction according to the moving position of the shutter member 104.
Rectangular notch hole 10 for opening 3,103
6,106 are formed.

The shutter member 104 is fitted to the cartridge main body 102 from the first side surface 102a side of the cartridge main body 102 so that the pair of shutter portions 105, 105 extend on the plane of the cartridge main body 102.
Along one side surface of the cartridge body 102 movably mounted recording and / or openings 103, 103 in FIG. 10 in the arrow _{c 1} direction or _{c 2} direction to open and close for playback.

As shown in FIG. 10, shutter sliding recesses 107, 107 having a depth corresponding to the thickness of the shutter portions 105, 105 are formed in the area of the flat portion of the cartridge body 102 where the shutter member 104 moves. Have been. The shutter member 104 includes shutter units 105 and 1.
By disposing the shutter 05 in the shutter slide concave portions 107, 107, the shutter portions 105, 105 are attached to the cartridge main body 102 substantially flush without protruding from the flat surface of the cartridge main body 102.

The disk cartridge has a shutter member 1
The first side surface 102a on which the optical disk 04 is attached is set as an insertion end to the disk recording and / or reproducing apparatus, and the mounting to the disk recording and / or reproducing apparatus is performed in a direction indicated by an arrow d in FIG. When the disk cartridge is inserted into the disk recording and / or reproducing apparatus, the shutter member 104 is moved by an arrow c in FIGS. 10 and 11 by a shutter opening / closing mechanism provided on the disk recording and / or reproducing apparatus side.
Opening 10 for recording and / or reproduction moved in _one direction
The first and second openings 103 and 103 are moved from the first position shown in FIG. 10 in which the openings 3 and 103 are closed to the second position shown in FIG.

[0008]

When the disk cartridge constructed as described above is inserted into a disk recording and / or reproducing apparatus in the wrong insertion direction, the recording and / or reproducing opening of the cartridge main body 102 is opened. Part 103,
There is a possibility that a magnetic head device or an optical pickup device arranged on the disk recording and / or reproducing device side may come into contact with a portion where the disk 103 is not provided. When the magnetic head device, the optical pickup device, and the like come into contact with the cartridge main body 102, the magnetic head device, the optical pickup device, or the disk cartridge may be damaged.

As shown in FIG. 10, the above-mentioned disk cartridge is inserted into the disk recording and / or reproducing apparatus in a direction parallel to the insertion direction of the cartridge body 102 into the disk recording and / or reproducing apparatus in order to prevent erroneous insertion into the disk recording and / or reproducing apparatus. The length a of the second side surface 102b is formed to be longer than the length b of the first side surface 102a on the insertion end side of the disk recording and / or reproducing apparatus, and is orthogonal to the first side surface 102a on the insertion end. The insertion from the second side surface 102b is prevented.

As described above, if the length of the second side surface 102b of the cartridge main body 102 is made longer than that of the first side surface 102a, the size of the disk cartridge increases. The cartridge main body 102 may be formed to have a size enough to rotatably store the disk 101. By forming the outer shape of the disk 101 into a square shape having an inscribed circle, the disk main body 102 Although it can be formed to the minimum size for accommodating the disk 101, the length of the second side surface 102b is set to be shorter than that of the first side surface 102a in order to reliably prevent erroneous insertion into the disk recording and / or reproducing apparatus. If the length is increased, the size of the disk cartridge is increased by the length of the length.

In particular, in order to reliably prevent erroneous insertion, the second
If the length of the side surface 102b is sufficiently longer than the first side surface 102a, the size of the disk cartridge itself will be further increased.

Further, in the disk cartridge in which the vertical and horizontal ratios of the disk cartridge are changed to prevent erroneous insertion, erroneous insertion in the front-rear direction and erroneous insertion in the front and back cannot be prevented.

Accordingly, the present invention has been proposed in view of the above-described circumstances, and a disk cartridge which can prevent erroneous insertion without increasing the size of the disk cartridge itself is to be surely erroneously inserted. It is an object of the present invention to provide a recording and / or reproducing apparatus which can prevent the recording and / or reproducing device from being correctly mounted at a cartridge mounting position.

[0014]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and achieve the above-mentioned objects, a recording and / or reproducing apparatus according to the present invention comprises first and second side faces parallel to the direction of insertion into the apparatus. A third side surface that is orthogonal to the first and second side surfaces and that is a front end side in the direction of insertion into the device, has a substantially rectangular flat surface, and records signals on a stored disk. A cartridge body in which an opening for exposing at least a part of the surface to the outside is formed, and one end of the cartridge body facing the third side is opened on the first side surface. A shutter release operation groove formed on the second side surface, the erroneous insertion prevention groove portion being parallel to the shutter release operation groove portion and having a length from the third side surface shorter than the shutter release operation groove portion; Insert a disk cartridge with An insertion portion to be inserted, a storage portion for storing the disk cartridge inserted from the insertion portion, and provided on the inner wall of the storage portion, and enter the shutter release operation groove of the disk cartridge inserted from the insertion portion, A shutter opening operation section for opening the shutter, and a projection provided on an inner wall of the storage section opposite to the inner wall on which the shutter opening operation section is provided, and protruding into the erroneous insertion preventing groove. It is.

In particular, the distance between the shutter opening operation portion and the projection is longer than the distance between the bottom of the opening operation groove of the shutter and the bottom of the erroneous insertion preventing groove, and It is shorter than the first or second side surface.

Also, the recording and / or reproducing apparatus according to the present invention has a first and a second side surface parallel to the direction of insertion into the apparatus, and a perpendicular to the first and second side faces, and A third side surface that is a front end side in the direction, the plane is formed in a substantially rectangular shape, and an opening is formed to expose at least a part of the signal recording surface of the accommodated disk to the outside. A shutter opening operation groove having one end facing the third side is formed on the first side of the cartridge body, and the shutter is formed on the second side. A disk cartridge having an erroneous insertion preventing groove formed in parallel with the release operation groove and having a shorter length from the third side than the shutter release operation groove is inserted, and the length of the third side is increased. Formed to a slightly longer length An insertion portion, a storage portion for storing a disk cartridge inserted from the insertion portion, and an inner wall of the storage portion, which enters a shutter release operation groove of the disk cartridge inserted from the insertion portion, A shutter opening operation unit for performing a shutter opening operation.

[0017]

In the recording and / or reproducing apparatus according to the present invention, when the disc cartridge is correctly inserted, the shutter opening operation member is engaged with the shutter opening operation groove, and the erroneous insertion preventing member is engaged with the erroneous insertion preventing groove. It is engaged and mounted. When the disc cartridge is inserted in the insertion direction back and forth or the insertion end is erroneous, the shutter opening operation member or the erroneous insertion prevention member abuts a part of the disc cartridge,
Further insertion into the recording and / or playback device is regulated,
Erroneous insertion into the recording and / or playback device is prevented.

When the disk cartridge is inserted upside down, the shutter opening operation member engages with the erroneous insertion preventing groove, which is shorter than the shutter opening operation groove, thereby recording and / or recording. Alternatively, further insertion into the playback device is restricted, thereby preventing erroneous insertion of the disk cartridge.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A recording and / or reproducing apparatus to which the present invention is applied will be described below with reference to the drawings.

First, a disk cartridge mounted on the recording and / or reproducing apparatus according to the present invention will be described. As shown in FIG. 3, the disk cartridge comprises a disk 1 serving as a recording medium for information signals and a disk 1 serving as a recording medium for information signals. And a cartridge body 2 for housing the cartridge body 1. The disk 1 in which the cartridge body 2 is stored has a signal recording layer provided by applying a magnetic material to a main surface of a disk substrate formed of a flexible material. In the center of the disc 1,
A disk hub 3 for holding a disk rotation drive mechanism provided in a disk recording and / or reproducing apparatus for recording and / or reproducing an information signal with respect to a signal recording layer is attached. The disk hub 3 is formed in a disk shape such as a metal plate. In this disk 1, an area on the outer peripheral side of the disk hub 3 is a signal recording area.

Cartridge main body 2 for storing disk 1
As shown in FIG. 3, the upper half 4 and the lower half 5, which form a pair, are butt-joined to each other, and are formed in a rectangular shape having a space in which the disk 1 can be stored. That is, the cartridge main body 2 has upper and lower main surfaces 4 a and 5 a facing the main surface of the disk 1.
Is formed in a rectangular shape slightly longer than the diameter of the disk hub 3, and the thickness thereof is formed slightly larger than the thickness of the disk hub 3.

As shown in FIG. 3, at least a part of the signal recording surface provided on the upper and lower surfaces of the disk 1 housed in the cartridge body 2 is formed on the upper and lower main surfaces 4a and 5a of the cartridge body 2. Openings 6 and 7 for recording and / or reproduction are provided over the inner and outer peripheries. As shown in FIGS. 2 and 3, these openings 6 and 7 are located at the center in the left-right direction of the cartridge body 2, and from the vicinity of the center of the cartridge body 2 to the first side surface 2 a of the cartridge body 2. Is formed in a substantially rectangular shape over the vicinity of. These recording and / or reproducing openings 6,
7, when the disc cartridge according to the present invention is mounted on a disc recording and / or reproducing apparatus,
Or recording and / or recording by a magnetic head or the like provided on the reproducing apparatus side.
Alternatively, a reproducing unit enters and records and / or reproduces an information signal on the disk 1.

At the center of the lower main surface 5a of the cartridge body 2, as shown in FIG. 3, a center opening 8 for allowing the disk hub 3 attached to the center of the disk 1 to face outward.
Are formed. The disk 1 housed in the cartridge body 2 is connected to the disk table of the disk rotation drive mechanism which enters through the central opening 8 via the disk hub 3 when the disk cartridge is mounted on the disk recording and / or reproducing apparatus. And can be rotated integrally with the disc table.

The cartridge body 2 is provided with a shutter member 9 for opening and closing the recording and / or reproducing openings 6 and 7. The shutter member 9 is formed so as to have a U-shaped cross section of polyacetal or the like, and includes a connecting piece 10 along the first side surface 2 a of the cartridge body 2 and a connecting piece 1.
And a pair of shutter portions 11 and 12 extending from both sides of the cartridge main body 0 so as to face each other and extending on the upper and lower main surfaces 4a and 5a of the cartridge body 2. These shutter units 1
Rectangular cutout holes 13 and 14 for opening the recording and / or reproducing openings 6 and 7 in accordance with the moving position of the shutter member 9 are formed in the holes 1 and 12.

The shutter member 9 includes a pair of shutter portions 1.
The upper and lower main surfaces 4a, 5a of the cartridge body 2
The cartridge body 2 is fitted to the cartridge body 2 from the first side surface 102 a side so as to extend upward, and recording and / or recording is performed along the first side surface 2 a of the cartridge body 2.
Alternatively, it is attached so as to be movable in an arrow K direction or an arrow L direction in FIGS.

Each shutter section 1 of the shutter member 9
1 and 12 are formed with a uniform thickness of about 0.3 mm.

Although not shown, a slide guide formed on the inner surface on the first side surface 2a side of the cartridge body 2 is provided on the inner surface of the connecting piece 10 of the shutter member 9 where the shutter portions 11, 12 are extended. An engaging claw to be engaged with the groove 15 is provided to protrude. As shown in FIG. 3, the slide guide groove 15 includes upper and lower halves 4 forming the cartridge body 2.
5 are formed by providing a pair of mutually parallel ridges on the opposing surfaces. The shutter member 9 engages the engagement claw with the slide guide groove 15 to
FIGS. 1 and 3 for preventing the cartridge body 2 from coming off and opening and closing the recording and / or reproducing openings 6 and 7.
It is attached so as to be movable in the direction of the middle arrow K or L.

The first side surface 2 of the cartridge body 2
Although not shown, a is provided with a notch for engaging the engaging claw provided on the shutter member 9 with the slide guide groove 15.

As shown in FIGS. 1 and 2, the upper and lower main surfaces 4a and 5a of the cartridge body 2 have a depth corresponding to the thickness of the shutter portions 11 and 12 in the region where the shutter member 9 moves. A shutter slide recess 16 having a height is formed. The shutter member 9 includes shutter portions 11, 1
By arranging the shutter 2 in the shutter slide recess 16, the shutter portions 11 and 12 are attached to the cartridge main body 2 substantially without being projected from the upper and lower main surfaces 4 a and 5 a of the cartridge main body 2.

The shutter slide recess 16 connects the shutter portions 11 and 12 to the upper and lower main surfaces 4a and 4a of the cartridge body 2.
Since the shutters 11 and 12 can be arranged without protruding from the shutter 5a, the shutters 11 and 12 are formed to have a thickness substantially equal to the thickness thereof. 0.3m to fit shutter sections 11 and 12
m.

As shown in FIGS. 1 and 2, the disk cartridge used in the disk recording and / or reproducing apparatus according to the present invention has a shutter along a first side surface 2a of a cartridge body 2 on which a shutter member 9 slides. A second groove parallel to the first side surface 2a is provided with a groove 18 for opening operation.
A groove 19 for preventing erroneous insertion is provided along the side surface 2b of the rim. In this way, the first and second parallel opposing first and second
Opening operation grooves 1 on the side surfaces 2a and 2b of the
8 and the disk cartridge provided with the erroneous insertion preventing groove 19, the third cartridge perpendicular to the first and second side surfaces 2a and 2b.
1 is inserted into the disc recording and / or reproducing apparatus according to the present invention with the side of the side 2c as the insertion end and the direction of arrow S in FIG. 1 as the insertion direction.

The shutter opening operation groove portion 18 provided on the first side surface 2a of the cartridge main body 2 has a shutter member having an opening end 18a on the third side surface 2c side to be inserted into the disk recording and / or reproducing apparatus. 9 are formed over the sliding direction. Shutter release operation groove 18
The shutter member 9 is moved from the third side surface 2c of the cartridge body 2 to the opening opening position shown in FIG. 2 in which the cutout holes 13 and 14 correspond to the recording and / or reproducing openings 6 and 7, respectively. are formed over the length range indicated by 3 in FIG. 2 reaches the end edge 10a located on the side surface 2c side of the arrow F _L of the connecting plate 10 when the.

The erroneous insertion preventing groove 19 formed on the second side surface 2b of the cartridge body 2 in parallel with the shutter opening operation groove 18 is provided on the third side surface 2c of the cartridge body 2.
The side is formed as an open end 19a along the second side surface 2b. The erroneous insertion preventing groove 19 has a length _GL from the third side surface 2c on the open end 19a side as shown in FIG.
It is formed shorter than the length F _L of the shutter opening actuating grooves 18.

[0034] That is, the length from the third side surface 2c of the cartridge body 2 of the insertion preventing groove 19 erroneously shutter opening actuating groove 18, the relation of _G L _<F L ··· (first type) is there.

The length _BL from the bottom surface of the shutter opening operation groove portion 18 on the third side surface 2c side of the cartridge body 2 to the bottom surface of the erroneous insertion prevention groove portion 19 is, as shown in FIG. First and second side surfaces 2 along the direction in which the main body 2 enters the disc recording and / or reproducing apparatus.
a, it is formed shorter than the length _{A L} of 2b. As shown in FIG. 1, the length _BL between the bottom surface of the shutter opening operation groove portion 18 on the third side surface 2c side of the cartridge body 2 and the bottom surface of the erroneous insertion prevention groove portion 19 is, as shown in FIG. shorter than the length C _L of the fourth side 2d parallel to the third side surface 2c.

[0036] That is, a relation of _B L _<A L ··· (second type) _B L _<C L ··· (third type).

Further, in the disk cartridge used in the recording and / or reproducing apparatus according to the present invention, the inner side of the upper side of the erroneous insertion preventing groove 19 formed on the first side surface 2a of the cartridge main body 2 shown in FIG. The height _HL from the side surface to the upper main surface 4a of the cartridge main body 2 and the height from the inner surface below the erroneous insertion preventing groove 19 shown in FIG. 4 to the lower main surface 4b of the cartridge main body 2 are shown. there is a height that is different from the I _L.

[0038] That is, have a relationship of _{H L} ≠ _{I L} ··· (4th formula), the insertion preventing groove 19 mis, is provided displaced in the thickness direction of the cartridge body 2. In the present embodiment, the erroneous insertion preventing groove 19 is provided at a position displaced toward the lower main surface 4b of the cartridge main body 2 as shown in FIG.

When the disc cartridge constructed as described above is not used in a disc recording and / or reproducing apparatus and is not used, as shown in FIG. Opening 6,
7 are closed at a first position.
To prevent dust and fingers from entering the cartridge body 2 via the.

As shown in FIG. 2, the disc cartridge is mounted on a cartridge mounting portion 51 of a disc recording and / or reproducing apparatus 50 with the third side surface 2c as an insertion end. A cartridge insertion / removal opening 51a constituting an insertion portion for inserting / removing a disk cartridge into / from the cartridge mounting portion 51 has a width slightly larger than the thickness of the cartridge body 2, and as shown in FIG. And / or the third side surface 2c to be inserted into the playback device 50
Of being formed by Tomo' slightly longer length E _L than the length C _L.

[0041] That is, a relation of _C L _<E L ··· (fifth method).

When the disc cartridge in the cartridge mounting portion 51 is correctly inserted, the cartridge body 2
A shutter opening operation pin 52 as a shutter opening operation member that engages with a shutter opening operation groove 18 formed on the first side surface 2a of the cartridge main body 2 protrudes from an inner wall surface facing the first side surface 2a. Have been. When the disk cartridge in the cartridge mounting portion 51 is correctly inserted, the inner wall surface facing the second side surface 2b of the cartridge main body 2 has an erroneous insertion prevention formed on the second side surface 2b of the cartridge main body 2. An erroneous insertion prevention pin 53 that engages with the groove 19 is protruded. That is, the shutter release operation pin 52 and the erroneous insertion prevention pin 53 are provided on the table so as to protrude in a direction orthogonal to the insertion direction of the cartridge insertion / removal opening 51a of the disk cartridge.

Then, the shutter release operation pin 52 is erroneously inserted.
Distance D between the tips of the entry prevention pins 53 _LIs shown in Figure 2
As shown in FIG.
Length B between bottom surfaces of stopper groove 19_LSlightly longer than
It is formed. The shutter release operation pin 52
D between the tip of the pin 53 and the pin 53_LThe cart
To the disk recording and / or reproducing device 50 of the ridge body 2
Length C of the third side surface 2c which is the insertion end of_LShorter than
Has been established. Further, the shutter release operation pin 52 is mistaken for
Distance D between the tips of insertion prevention pins 53_LIs a cartridge
The first side surface 2 on which the shutter member 9 of the main body 2 slides
A length A_LIt is formed shorter.

[0044] That is, a relation of _B L _<D L ··· (Sixth formula) _D L _<C L ··· (Seventh formula) _D L _<A L ··· (Eighth method).

As shown in FIG. 2, when the disc cartridge is correctly inserted into the cartridge mounting portion 51, the shutter opening operation pin 52 is used.
The shutter member 9 at the first position, which is engaged with the shutter 8 and closes the recording and / or reproducing openings 6, 7
7 is provided at a position sufficient to move it to the open second position. That is, as shown in FIG. 2, when the disc cartridge is mounted on the cartridge mounting portion 51 and the shutter member 9 is moved to the second position where the recording and / or reproducing openings 6 and 7 are opened. when in the distance corresponding to the length indicated by the second side surface 2c of the cartridge body 2 in the third through to one edge 10a located on the side surface 2c side 2 in the arrow F _L of the connecting plate 10 of the shutter member 9 Only the cartridge insertion / removal opening 51a is provided.

As shown in FIG. 2, the erroneous insertion prevention pin 53 allows the shutter member 9 to open the recording and / or reproducing openings 6 and 7 when the disk cartridge is mounted on the cartridge mounting portion 51. When it is moved to the second position, it is provided at a position in contact with or close to the bottom 19a on the insertion direction side when the erroneous insertion preventing groove 19 is formed. That is, the erroneous insertion prevention pin 53 is inserted into the cartridge mounting portion 50 as shown in FIG.
When properly installed in the cartridge body 2, the erroneous insertion preventing groove 19 shown by the arrow _{GL in} FIG.
Is provided from the third side surface of the cartridge main body 2 toward the cartridge insertion / removal opening 51a by a distance corresponding to the length _GL . The erroneous insertion prevention pin 53 is provided at a position displaced on the main surface 5a on the lower side in the thickness direction of the cartridge body 2 so as to correspond to the erroneous insertion prevention groove 19.

As described above, the shutter release operation pin 52
By providing the erroneous insertion prevention pin 53 in the cartridge mounting portion 51, the disc cartridge
c as the insertion end, the shutter opening operation groove 18 is positioned on the shutter opening operation pin 52 side, and the erroneous insertion prevention groove 1
When the shutter opening operation pin 52 is inserted into the cartridge mounting portion 51 through the cartridge insertion / removal opening 51a so that the shutter 9 is positioned on the side of the erroneous insertion prevention pin 53, the shutter opening operation pin 52 enters the shutter opening operation groove 18; Shutter member 9
Abut on the end of the connecting plate 10. When the disc cartridge is further inserted into the cartridge mounting portion 51, the shutter member 9 is moved relative to the cartridge main body 2 inserted into the cartridge mounting portion 51 in the direction of arrow K in FIG. Units 11 and 12 record and / or
Alternatively, it is moved from the first position where the openings 6 and 7 for reproduction are closed toward the second position where the openings 6 and 7 are opened.

Further, when the disk cartridge is inserted inside the cartridge mounting portion 51, the erroneous insertion prevention pin 53 enters the erroneous insertion prevention groove 19, and the shutter member 9 is inserted.
Is moved in the direction of arrow K in FIG. 1 to a second position where the recording and / or reproducing openings 6 and 7 are opened. At this time, the disk cartridge is inserted into the cartridge mounting section 5.
1 and is in a state where recording and / or reproduction of an information signal is possible.

The disc cartridge used in the disc recording and / or reproducing apparatus according to the present invention can be obtained by the following formulas (3), (5) and (7): B _L <D _L <C _L <E _L. (Equation 9).

Therefore, the disk cartridge to be mounted on the apparatus according to the present invention was inserted into the cartridge mounting portion 51 of the disk recording and / or reproducing apparatus from the fourth side surface 2d of the cartridge body 2 with the insertion end inverted. In this case, the fourth surface 2d of the cartridge body 2 comes into contact with the shutter opening operation pin 52, and the insertion of the cartridge mounting portion 51 into a predetermined cartridge mounting position is restricted, thereby preventing erroneous insertion.

From the above-mentioned equations (2), (6) and (8), there is an intersystem of BL <DL <AL (Equation 10).

Therefore, the disk recording and / or reproducing apparatus according to the present invention can provide the first surface 2a or the second surface 2a orthogonal to the third surface on which the disk cartridge is inserted.
b is inserted into the cartridge mounting portion 51 with the first end 2a or the second surface
The erroneous insertion prevention pin 53 comes into contact with the surface 2b of the cartridge, and the insertion of the cartridge mounting portion 51 into a predetermined cartridge mounting position is regulated, thereby preventing erroneous insertion.

Further, in the disk cartridge used in the apparatus according to the present invention, as shown in the first and fourth formulas, the erroneous insertion preventing groove 19 is formed shorter than the shutter opening operation groove 18. , Misinsertion preventing groove 19
Is provided at a position displaced from the center in the thickness direction of the cartridge main body 2, so that when the cartridge body 2 is inserted upside down into the cartridge mounting portion 51, the first surface 2a serving as an insertion end is formed.
Abuts on the shutter release operation pin 52, the insertion of the cartridge mounting portion 51 into a predetermined cartridge mounting position is regulated, and erroneous insertion is prevented.

In the disk cartridge used in the apparatus according to the present invention, the erroneous insertion preventing groove 19 is formed shorter than the shutter opening operation groove 18 as shown in the above-described first formula, so that the erroneous insertion is performed. The provision of the preventing groove 19 does not require the cartridge body 2 to be large, and can be downsized.

The disk cartridge used in the apparatus according to the present invention is not limited to the above-described example.
As shown in FIG. 6, the groove 19 for preventing erroneous insertion is connected to the upper main surface 4 a or the lower main surface 5 of the cartridge body 2.
a may be provided. 5 and 6
The disc cartridge shown in FIG.
The main surface 5 on the upper side of the cartridge main body 2 from the third side surface 2c which is the insertion end of the cartridge main body 2 to the cartridge mounting portion 50 toward the inside of the cartridge main body 2
a. The erroneous insertion preventing groove 19 is formed shorter than the shutter opening operation groove 18 similarly to the above-described disc cartridge. As shown in FIGS. 5 and 6, the erroneous insertion preventing groove 19 is formed from the bottom surface of the shutter opening operation groove 18 formed along the first side surface 2a of the cartridge body 2.
9 to the side located on the first side 2a side
_L have been made shorter than the length C _L of the third side surface 2c and the fourth side surface 2d perpendicular to the first side surface 2a of the cartridge body 2. In addition, the length _BL of the shutter opening operation groove 18 is set to the first and second side surfaces 2a, 2 parallel to the direction of insertion of the cartridge body 2 into the cartridge mounting portion 51.
b have been made shorter than the length A _L of.

In the disk cartridge having the above-described structure, the erroneous insertion preventing pin is provided in the cartridge mounting portion 51 of the disk recording and / or reproducing apparatus 50 in correspondence with the erroneous insertion preventing groove 19, so that the cartridge body 2 Without increasing the size of the cartridge body 2
Is set as the insertion end in a direction different from the normal insertion direction, or an erroneous insertion of the cartridge into the cartridge mounting portion 51 with the front and back reversed is prevented.

In the disk cartridge shown here, an optical disk or a magneto-optical disk is housed in the cartridge body 2.

In the disk cartridge used in the apparatus according to the present invention, as shown in FIGS. 7, 8 and 9, a groove 19 for preventing erroneous insertion is formed from the lower main surface 5a of the cartridge body 2. First and second different in depth
May be formed to have the concave portions 19a and 19b.

Also in this disk cartridge, an optical disk or a magneto-optical disk is housed in the cartridge body 2.

In this example, a shutter member for opening and closing the recording and / or reproducing opening 7 for exposing a part of the disk 1 housed in the cartridge body 2 to the outside is omitted from the drawing. is there.

The cartridge main body 2 constituting this disk cartridge is formed by butt-connecting a pair of upper and lower halves 4 and 5 similarly to the cartridge main body 2 of the above-described disk cartridges. At the center of the main surface 5a on the lower side of the cartridge body 2, a central opening 8 is formed to allow the disk hub 3 attached to the center of the disk 1 to face outward.

This disc cartridge has a third side surface 2c orthogonal to the first side surface 2a on which the shutter member for opening and closing the recording and / or reproducing opening 7 of the cartridge body 2 slides as an insertion end in FIG. It is inserted in the direction of arrow S and is mounted on the cartridge mounting portion of the disk recording and / or reproducing apparatus.

As shown in FIG. 8, the cartridge main body 2 constituting the disc cartridge of the present embodiment has a second side surface 2b parallel to the first side surface 2a of the erroneous insertion preventing groove 19, and a second side surface 2b. The length B _L reaching the side surface 2b is the length A of the first side surface 2a and the second side surface 2b of the cartridge body 2.
It is formed shorter than _L. The length B _L from the side surface on the second side surface 2b side parallel to the first side surface 2a of the erroneous insertion preventing groove portion 19 to the second side surface 2b is the insertion end of the cartridge body 2 into the cartridge mounting portion. The third side 2c which is the side and the fourth side 2d which is in love with the third side 2c
It is formed shorter than the length C _L of the. The cartridge main body 2 constituting the disk cartridge of the present embodiment has the above-described relationship of the second and third formulas.

In the disk cartridge of this embodiment, similarly to the above-described disk cartridges, erroneous insertion preventing pins are provided in the cartridge mounting portion 51 of the disk recording and / or reproducing apparatus so as to correspond to the erroneous insertion preventing grooves 19. This prevents an erroneous insertion in which the cartridge body 2 is inserted into the cartridge mounting portion 51 in a direction different from the normal insertion direction, or upside down, without increasing the size of the cartridge body 2.

The groove 19 for preventing erroneous insertion provided in the cartridge body 2 constituting the disk cartridge of this embodiment.
Are formed with first and second concave portions 19a and 19b having different depths from the lower main surface 5a of the cartridge body 2. The first concave portion 19a is provided on the third side surface 2c side of the cartridge 2 in the erroneous insertion preventing groove portion 19, and the second concave portion 19b is provided on the inner side of the cartridge main body 2.

The second concave portion 19b is
Has a depth substantially the same as the depth of the erroneous insertion preventing groove 19 provided in the disk cartridge shown in FIGS. 5 and 6 described above. First recess 19a
The depth from the lower main surface 5a of the cartridge body 2 is formed deeper than the second recess 19b, as shown in FIG. The first concave portion 19a has a different depth from the second concave portion 19b to indicate the type of the disc 1 stored in the cartridge body 2.

Here, the type of the disk 1 means whether the disk 1 housed in the cartridge body 2 is a disk such as a recording / reproducing type magneto-optical disk capable of recording an information signal or whether an information signal is recorded in advance. This is a read-only optical disk that has been used.

The second concave portion 19 b is formed in the erroneous insertion preventing groove portion 19.
By providing the deeper first concave portion 19a, it is indicated that the disk 1 stored in the cartridge body 2 is, for example, a recording / reproducing magneto-optical disk.

When this disk cartridge is inserted into the cartridge mounting portion of the disk recording and / or reproducing apparatus, the erroneous insertion preventing pin provided on the cartridge mounting portion side enters the inner end of the erroneous insertion preventing groove 19. . At this time, a disc type detection mechanism configured by using a micro switch, a link mechanism, or the like is provided on the disc recording and / or reproducing apparatus side, and the first insertion groove 19 for preventing erroneous insertion has a large depth.
By detecting whether or not the concave portion 19a is provided, the type of the disc 1 stored in the disc cartridge is identified. When the disk type detecting mechanism detects that the first concave portion 19a having a large depth is provided in the erroneous insertion preventing groove portion 19, the recording / reproducing type magneto-optical disk is stored in the cartridge body 2. Is detected, the magnetic head device for signal recording constituting the recording / reproducing means of the disk recording and / or reproducing device can be driven, and the output of the optical pickup device can be switched to the output for recording the information signal. And

When the erroneous insertion preventing groove 19 is not provided with the deep first concave portion 19a, that is, the entire erroneous insertion preventing groove 19 has the depth of the second concave portion 19b. If it is formed, it is not detected by the disc type detecting mechanism that the first concave portion 19a having a large depth is provided in the erroneous insertion preventing groove portion 19, and the read-only type is provided in the cartridge body 2. Is detected, the signal recording magnetic head device is held in an inoperative state, and the output of the optical pickup device is switched to an output for reading an information signal.

When the erroneous insertion preventing groove portion 19 is divided into a plurality of concave portions having different depths, the number of concave portions is not limited to two as in the above-described embodiment, but may be three or more. It may be provided. Further, the direction of division of the plurality of recesses is not limited to that formed in the direction in which the disc cartridge is inserted into the disc recording and / or reproducing apparatus as in the above-described embodiment, and is arranged in a direction perpendicular to the insertion direction. May be.

When a plurality of recesses having different depths from each other are provided in the erroneous insertion preventing groove 19 as described above, the erroneous insertion preventing groove 19 is provided in the disk cartridge shown in FIGS. As described above, the cartridge body 2 may be provided on the second side surface 2b.

The disk cartridge used in the apparatus of the present invention is not limited to the disk cartridge having the recording and / or reproducing openings 6 and 7 on the upper and lower main surfaces of the cartridge main body 2 as in each of the above-described examples. A recording and / or reproducing opening may be provided only on the surface. As the shutter member 9 attached to the disk cartridge, a member provided with only a shutter portion for opening and closing an opening on one side is used.

Further, the disk cartridge used in the apparatus of the present invention is not limited to a disk containing a magnetic disk, an optical disk, or a magneto-optical disk, but may be a disk containing an information recording medium of various other types. Is also good.

[0075]

As described above, according to the present invention, when the disk cartridge is inserted in the insertion direction in the front-rear direction or when the insertion end is erroneously inserted, the shutter opening operation member or the erroneous insertion prevention member contacts a part of the disk cartridge. When the disc cartridge is inserted upside down, the shutter opening operation member engages with the erroneous insertion prevention groove, which is shorter than the shutter opening operation groove.
Since further insertion is restricted to prevent erroneous insertion, erroneous insertion of the disc cartridge can be reliably prevented.

[Brief description of the drawings]

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

FIG. 2 is a plan view showing a state where a disk cartridge according to the present invention is inserted into a cartridge mounting portion of a disk recording and / or reproducing apparatus, and an opening for recording and / or reproduction is opened.

FIG. 3 is an exploded perspective view of the disk cartridge according to the present invention.

FIG. 4 is a side view showing a side surface of the disk cartridge according to the present invention at the insertion end side into a disk recording and / or reproducing apparatus.

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

6 is a side view showing a side surface of the disk cartridge shown in FIG. 5 on the side of an insertion end into a disk recording and / or reproducing apparatus.

FIG. 7 is a side view showing a side surface of an insertion end side of a disk cartridge according to another embodiment of the present invention in a disk recording and / or reproducing apparatus.

8 is a plan view of the disk cartridge shown in FIG.

9 is a shutter perspective view showing an erroneous insertion preventing groove provided in the disk cartridge shown in FIG. 7;

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

FIG. 11 is a plan view showing a state where an opening for recording and / or reproduction is opened in a conventional disk cartridge.

[Explanation of symbols]

1 disc, 2 cartridge body, 6, 7 opening for recording and / or reproduction, 9 shutter member,
18 shutter opening operation groove portion, 19 erroneous insertion preventing groove portion, 51 cartridge mounting portion, 51a cartridge insertion / removal opening, 52 shutter opening operation pin, 53
Mis-insertion prevention pin

Continuation of the front page (56) References JP-A-62-58453 (JP, A) JP-A-62-295283 (JP, A) JP-A-62-114182 (JP, A) JP-A-62-67751 (JP, A) JP-A-4-255981 (JP, A) JP-A-62-252 (JP, U) JP-A-62-2682 (JP, U) JP-B-61-25251 (JP, B2) 2-49022 (JP, Y2) (58) Fields studied (Int. Cl. ⁷ , DB name) G11B 23/03 G11B 17/04 G11B 23/28

Claims (3)

(57) [Claims] A first and a second parallel to the direction of insertion into the device.
And a third side surface which is orthogonal to the first and second side surfaces and is a front end side in the direction of insertion into the device, has a substantially rectangular flat surface, and is accommodated in the disk. A cartridge body in which an opening is formed so that at least a part of the signal recording surface of the cartridge body faces outward. One end of the cartridge body facing the third side has one end facing the third side. An open shutter release operation groove is formed, and an erroneous insertion is formed on the second side surface in parallel with the shutter release operation groove and shorter in length from the third side surface than the shutter release operation groove. An insertion portion into which a disk cartridge having a groove for prevention formed therein is inserted; a storage portion for storing a disk cartridge inserted from the insertion portion; and a disk provided on an inner wall of the storage portion and inserted from the insertion portion. A shutter opening operation portion for entering the shutter opening operation groove of the cartridge and opening the shutter, and an erroneous insertion prevention member provided on an inner wall of the housing portion opposed to an inner wall provided with the shutter opening operation portion, and A recording and / or reproducing apparatus, comprising: 2. A distance between the shutter opening operation portion and the projection is longer than a distance between a bottom of the opening operation groove of the shutter and a bottom of the erroneous insertion preventing groove. 2. The recording and / or reproducing apparatus according to claim 1, wherein the apparatus is shorter than the first or second aspect. 3. First and second parallel to the direction of insertion into the device.
The length of the third side surface which is orthogonal to the first and second side surfaces and is closer to the front end side in the direction of insertion into the device than the length of the side surface of
Has a cartridge body in which a long flat surface is formed in a substantially rectangular shape, and an opening for exposing at least a part of the signal recording surface of the accommodated disk to the outside is formed,
A shutter opening operation groove is formed on the first side surface of the cartridge main body, and a length from the third side surface is parallel to the shutter opening operation groove on the second side surface. A disk cartridge having an erroneous insertion prevention groove formed therein which is shorter than the groove for insertion is inserted, and an insertion portion formed to have a length slightly longer than the length of the third side surface, and a disk cartridge inserted from the insertion portion is inserted into the disk cartridge. a housing part for housing, provided on the inner wall of the housing part, enters into the groove for the shutter release operation of the inserted disc cartridge from the insertion portion, and the shutter opening operation portion for performing an opening operation of the shutter, the housing part Inner wall provided with the above shutter opening operation section
Is provided on the inner wall opposite to
And a distance between the shutter opening operation section and the projection is increased.
The bottom of the shutter opening operation groove and the above-mentioned erroneous insertion prevention
Longer than the distance between the bottom of the groove and the first or
A recording and / or reproducing device shorter than the second aspect .