JP3000753B2 - Disk cartridge erroneous recording prevention mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for preventing erroneous recording of a disk cartridge containing a disk capable of re-recording an information signal such as a magneto-optical disk.

[0002]

2. Description of the Related Art Conventionally, a disk, such as a magnetic disk or a magneto-optical disk, which erases an information signal once recorded and enables recording of a new information signal is used. In order to prevent the information signal once recorded from being accidentally erased,
An erroneous recording prevention mechanism is provided.

The erroneous recording prevention mechanism can freely select a state in which information signals can be re-recorded on a disk housed in a disk cartridge and an erroneous recording prevention state in which erasure of information signals once recorded is prevented. It is configured as follows.

[0004] As a mechanism for preventing erroneous recording of a disk cartridge configured to be able to select between such a rewritable state and an erroneous recording prevention state, a mechanism configured as shown in FIG. 10 is known.

The erroneous recording prevention mechanism is configured such that an erroneous recording prevention member 3 for opening and closing an erroneous recording detection hole 2 formed in a corner portion of a lower half 1 constituting a cartridge body is movably attached to the lower half 1. Things. The erroneous recording prevention member 3 is formed by molding a synthetic resin or the like, and is large enough to close the erroneous recording detection hole 2 formed in the lower half 1 as shown in FIG. The first and second elastic arms 5 and 6 are extended from both sides of one end of the erroneous recording prevention section 4 so as to face each other.

On the other hand, a slide guide piece 7 for guiding the erroneous recording preventing member 3 in the sliding direction is formed upright on the inner surface of the lower half 1. This slide guide piece 7
Is formed substantially in parallel with a rising peripheral wall 8 that forms a rear peripheral wall on the rear side of the cartridge main body that rises up on the outer peripheral edge of the lower half 1. And the slide guide piece 7
The erroneous recording prevention member 3 is provided on the surface facing the rising peripheral wall 8.
First and second engagement recesses 10 and 11 are formed on the outer surface on the distal end side of one of the elastic arms 5 so as to be relatively engaged with the locking projections 9 formed thereon. These first and second engaging concave portions 10 and 11 are moved to a position where the erroneous recording prevention member 3 closes the erroneous recording detection hole 2 and to a position where the erroneous recording detection hole 2 is opened. Sometimes, the locking projections 9 are formed at positions where they can be engaged.

On the rising peripheral wall 8 formed integrally with the lower half 1, a moving operation portion 12 formed on the outer surface of the other elastic arm portion 6 of the erroneous recording prevention member 3 on the distal end side is provided with a cartridge main body. The opening 13 facing the outside is cut out. The opening 13 is provided with the erroneous recording prevention member 3.
Is provided with a width sufficient to move the error recording detection hole 2 between a position where the hole 2 is closed and a position where the hole 2 is opened.

In addition, a shielding wall 14 is formed in the lower half 1 so as to face the opening 13.

[0011] The erroneous recording preventing member 3 is shown in FIG.
As shown in the figure, the erroneous recording prevention section 4 is located on the side facing the erroneous recording detection hole 2, and the pair of elastic arms 5, 7 is extended between the slide guide piece 7 and the rising peripheral wall 8 so as to be lower. It is arranged in half 1. The width W ₁ between the pair of elastic arms 5, 7 is formed to be larger than the distance W ₂ between the slide guide piece 7 and the rising peripheral wall 8. Therefore, when the pair of elastic arms 5 and 7 are extended between the slide guide piece 7 and the rising peripheral wall 8, they are elastically displaced in directions approaching each other, and the slide guide piece 7 and the rising peripheral wall 8. Respectively.

The moving operation section 12 formed on the other elastic arm section 6 of the erroneous recording prevention member 3 disposed in the lower half 1 as described above is moved to the outside of the cartridge body through the opening 13. You will be faced.

As described above, the erroneous recording prevention member 3 disposed in the lower half 1 is moved by the moving operation formed on the other elastic arm portion 6 which faces the outside of the cartridge body through the opening 13. The pair of elastic arms 5 and 6 are guided by the slide guide piece 7 and the rising peripheral wall 8 by being pinched and slid by the portion 12, and slid in the directions of arrows A and B in FIG.

The erroneous recording prevention member 3 is provided in FIG.
As shown in FIG. 5, when the erroneous recording prevention portion 4 is in the position where the erroneous recording detection hole 2 is closed, the locking ridge 9 formed on one of the elastic arms 5 is relatively engaged with the first engagement concave portion 10. Then, the erroneous recording detection hole 2 is kept closed. When the erroneous recording prevention member 3 is slid in the direction of arrow A in FIG. 11 and the erroneous recording prevention portion 4 reaches a position where the erroneous recording detection hole 2 is opened, as shown in FIG. Article 9 is second
And holds the state in which the erroneous recording detection hole 2 is opened.

[0013]

The erroneous recording preventing member 3 constituting the erroneous recording preventing mechanism is provided between the slide guide piece 7 and the rising peripheral wall 8 by elastically displacing the pair of elastic arms 5 and 6. Since it is supported by the lower half 1 so as to be in pressure contact with each other, the width W between the pair of elastic arms 5 and 6 is set.
_If there is an error in ₁ , the slide guide piece 7 and the rising peripheral wall 8 cannot be supported by being pressed against each other. When the width W ₁ between the pair of resilient arms 5, 6 becomes smaller than the spacing W ₂ between the slide guide piece 7 and the rising circumferential wall 8, the slide guide pieces the pair of elastic arm portions 5 and 6 It becomes impossible to press and support between the peripheral wall 7 and the rising peripheral wall 8. As a result, the erroneous recording prevention member 3 may fall off the cartridge body during the assembly of the disk cartridge.

Further, the locking ridge 9 cannot be reliably engaged with the first and second engagement recesses 10 and 11, and the erroneous recording detection hole 2 cannot be stably opened and closed. This makes it impossible to reliably set the recordable state and the non-recordable state of the information signal.

In the erroneous recording preventing member 3 formed by molding a synthetic resin, it is difficult to maintain the dimensional accuracy of the pair of elastic arms 5 and 6 with high accuracy. It is easy to cause problems. In particular, in the case where the pair of elastic arms 5 and 6 are extended apart from one end side of the erroneous recording prevention section 4 like the conventional erroneous recording prevention member 3, the pair of elastic arms 5 and 6 are extended. _No. 6 is easily displaced in a direction in which the widths W1 in the directions approaching each other in the direction having a space during molding are reduced. For this reason, the above-described problem is easily caused.

Therefore, the present invention is to ensure that the erroneous recording prevention member is securely held in the cartridge body, even when the erroneous recording prevention member is formed by molding a synthetic resin. The present invention provides an erroneous recording prevention mechanism for a disk cartridge that can reliably prevent the erroneous recording prevention member from falling off during and after assembly of the disk cartridge and can reliably set the recordable state and the non-recordable state of the information signal. It has been proposed for the purpose of doing so.

[0017]

According to the present invention, there is provided a disk cartridge erroneous recording preventing mechanism for achieving the above-mentioned object, comprising a pair of elastic arms extending from an erroneous recording preventing portion, and a erroneous recording. An erroneous recording prevention member having at least a part thereof facing an opening formed in the cartridge body provided integrally with the prevention part, and having a moving operation part for operating the erroneous recording prevention part from outside the cartridge body. A slide guide piece provided on a cartridge body that guides a moving direction of a pair of elastic arm portions provided on the erroneous recording prevention member, and at least one of a pair of arm portions provided on the erroneous recording prevention member; And engaging means provided between the slide guide pieces for relative engagement.

[0018]

The erroneous recording prevention member constituting the erroneous recording prevention mechanism of the disk cartridge according to the present invention is provided on the outer side of the cartridge main body via a moving operation part at least partially facing an opening formed in the cartridge main body. , The pair of elastic arms extended from the erroneous recording prevention portion are guided by a slide guide piece provided on the cartridge body to be moved.

The erroneous recording prevention member is provided between at least one of the pair of elastic arms and the slide guide piece at a position where the erroneous recording detection hole formed in the cartridge body is closed and opened. The engaged means are relatively engaged with each other and are held at the above positions. The erroneous recording prevention member has a configuration in which a slide guide piece is sandwiched between a pair of elastic arm portions.

[0020]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a specific embodiment of a disk cartridge erroneous recording prevention mechanism according to the present invention. The disk cartridge to which the present invention is applied contains a magneto-optical disk 21 which is a disk capable of erasing an information signal once recorded and re-recording a new information signal. This disk cartridge comprises a cartridge body 24 formed by butt-connecting a pair of upper and lower halves 22 and 23 each having a square shape, and rotatably storing the magneto-optical disk 21 in the cartridge body 24. It is.

The cartridge body 24 includes:
When this disk cartridge is mounted on a recording / reproducing apparatus, a disk table entry opening 25 into which a disk table of a disk rotation drive for rotating the magneto-optical disk 21 housed in the cartridge body 24 enters.
Has been established. The disk table entry opening 25 is formed so that an inner peripheral portion including a center hole 21a placed on the disk table of the optical disk 21 housed in the cartridge body 24 can face outward. As shown in FIG. 1, the lower half 23 is formed at a substantially central portion thereof with a circular opening.

On the upper and lower surfaces of the cartridge body 24, that is, on the upper and lower halves 22, 23, an information signal for causing at least a part of the signal recording area of the optical disk 21 accommodated therein to be exposed to the outside over the inner and outer circumferences. Openings 26 and 27 for recording and reproduction are opened. As shown in FIG. 1, the information signal recording / reproducing openings 26 and 27 extend from the position close to the disk table entry opening 25 to the front surface 24a of the cartridge body 24 in the left-right direction of the cartridge body 24. It is formed in a square shape at a substantially central position.

Further, the cartridge body 24 includes
In order to prevent dust and the like from entering through the information signal recording / reproducing openings 26 and 27 and sticking to the optical disk 21 stored therein, the information signal recording / reproducing openings 26, 27 are prevented. Shutter member 28 that closes 27
Is arranged. The shutter member 28 is formed by punching and bending a thin metal plate, and includes shutter portions 28a and 28b for closing the information signal recording / reproducing openings 26 and 27, respectively, and these shutter portions 28a and 28b. 2
And a connecting piece 28c for connecting the base end side of the base member 8b.
The whole is formed in a U-shaped cross section. On one side of the connecting piece 28c, a slide guide portion 29 that projects so that the shutter member 28 can slide in parallel along the front surface 24a side of the cartridge main body 24 is protrudingly provided.

In the shutter member 28, each of the shutter portions 28a and 28b has an information signal recording / reproducing opening 2
6 and 27 so that the cartridge body 2
2 and 3, the information signal recording / reproducing openings 26 and 27 are closed and the information signal recording / reproducing opening 2 is closed as shown by the solid lines in FIGS.
2, and can be slid in the directions indicated by arrows C and D in FIG.

On the other hand, a shutter member 8 is provided at one corner on the front side of the lower half 3 constituting the cartridge body 4.
As shown in FIGS. 2 and 3, when the information signal recording / reproducing openings 26, 27 are closed, the information signal recording / reproducing openings 26, 27 are not opened by careless movement. As shown in FIG. 1, a shutter lock member 31 that engages with an engaged piece 30 formed by bending a part of the slide guide portion 29 and holds the shutter member 28 in the closed position is arranged as shown in FIG. Has been established.

The cartridge body 24 has one corner on the front surface 24a side where the shutter lock member 31 is disposed and one corner portion on the rear surface 24b opposite to the disk table entry opening 25, As shown in FIG. 1, an erroneous recording preventing member 32 is provided. The erroneous recording preventing member 32 is provided while being held on the lower half 23 side, and one corner portion of the lower half 23 on the back surface 24b side where the erroneous recording preventing member 32 is disposed. The erroneous recording detection hole 33 which is opened and closed by the erroneous recording prevention member 32 is formed in the piercing hole. That is, the erroneous recording detection hole 33 is, as shown in FIG.
Is formed on one of the corners on the back surface 24b side and is located on the lower main surface.

As shown in FIG. 3, when the disc cartridge is mounted on the cartridge mounting portion in the recording / reproducing apparatus, the lower main surface of the cartridge main body 24 where the erroneous recording detection hole 33 is formed, Positioning pin engagement holes 34 and 35 are provided for engaging positioning pins for positioning the mounting position of the disk cartridge. These positioning pin engagement holes 34 and 35 are
Shutter member 28 facing the back surface 24b side where
Are located at the respective corners on the front surface 24a side where the is disposed. On the lower main surface of the cartridge main body 24, a loading mechanism engaging concave portion 36 with which a cartridge holding claw of an auto loading mechanism used for automatically mounting a disk cartridge on a cartridge mounting portion in the recording / reproducing apparatus is engaged. , 37 are formed.
The loading mechanism engaging recesses 36 and 37 are provided on the front surface 24 of the cartridge body 24 on which the shutter member 28 is disposed.
It is located on one side surface 24c, which is an insertion end to the cartridge mounting portion, which is orthogonal to a, and is formed from the lower main surface to the front surface 24a and from the lower main surface to the back surface 24b.

Further, as shown in FIG. 3, the cartridge main body 2 is provided on the lower main surface of the cartridge main body 24.
4 is provided with a magneto-optical disk display recess 38 indicating that the disk accommodated in the disk 4 is the magneto-optical disk 21. The magneto-optical disk display concave portion 38 has a front surface 24a on one side surface 24c side to be inserted into the cartridge mounting portion.
It is provided at a position close to the side.

Further, as shown in FIG. 3, the lower main surface of the cartridge main body 24 has another side surface 24c opposite to one side surface 24c which is an insertion end to the cartridge mounting portion.
and disc discriminating holes 39 and 4 for discriminating the type and the like of the magneto-optical disc 21 housed in the cartridge body 24 so as to be located in parallel with the erroneous recording detection hole 33.
0 is provided.

The erroneous recording prevention member 32 provided in the cartridge main body 24 is formed by molding a synthetic resin or the like. As shown in FIG.
At the base end side, there is provided an erroneous recording prevention section 41 having a substantially square shape large enough to close the erroneous recording detection hole 33 formed in at least the lower half 23. From one end surface side of the erroneous recording prevention portion 41, a pair of elastic arms 42 and 43 opposed to each other which can be elastically displaced, and a pair of elastic arms 42 and 4 are provided.
A moving operation arm portion 44 as a moving operation portion extends so as to be substantially parallel to 3.

The pair of elastic arms 42, 4
Numerals 3 are different in length from each other, and one elastic arm 42 is formed to be longer than the other elastic arm 43. In addition, locking protrusions 45, which protrude in opposite directions, are provided on the respective distal ends of the pair of elastic arms 42, 43.
A bulge 46 is formed. As described above, the locking ridges 45 and 46 are formed on the distal ends of the pair of elastic arms 42 and 43 having different lengths. As shown in FIG. 4, they are positioned so as to mesh with each other.

A moving operation portion 47 is formed on the distal end side of the moving operation arm portion 44 so as to protrude outward in a direction opposite to the pair of elastic arm portions 42 and 43.

On the other hand, as shown in FIG. 4, a pair of elastic members provided on the erroneous recording prevention member 32 are provided on the inner surface of the lower half 23 constituting the cartridge body 24 in which the erroneous recording prevention member 32 is disposed. In addition to guiding the movement direction of the arm portions 42, 43, the pair of elastic arm portions 42, 43
A slide guide piece 48 sandwiched between the two is formed upright. The slide guide piece 48 is a lower half 2 that forms a wall surface on the back surface 24 b side of the cartridge body 24.
It is formed in parallel with the rising peripheral wall 49 rising from 3.

The slide guide piece 48 includes
The first and second engagement recesses 50, which engage with the locking projection 45 formed on the distal end side of the one elastic arm portion 42,
51 are formed. The first and second engagement concave portions 50 and 51 are formed by bulging a part of the slide guide piece 48 into a concave shape, and the position where the erroneous recording prevention member 32 closes the erroneous recording detection hole 33. Are formed at positions where the locking ridges 45 can engage when moved to the position where the erroneous recording detection hole 33 is opened and when the erroneous recording detection hole 33 is opened.

The back surface 24b of the cartridge body 24
As shown in FIG. 3, the moving operation unit 47 is formed on the distal end side of the moving operation arm unit 44 so as to protrude outward in the opposite direction to the elastic arm units 42 and 43. An opening 52 facing the side is cut out. The opening 52 is formed by cutting out a part of a rising peripheral wall 49 that rises from upper and lower halves 22 and 23 that form a wall surface on the back surface 24 b side of the cartridge body 24. The opening 52 has a width enough to move the erroneous recording prevention member 32 between the position where the erroneous recording detection hole 33 is closed and the position where the erroneous recording detection hole 33 is opened.

In the lower half 23, the opening 52 is provided.
And a shielding wall 54 is formed upright. The shielding wall 54 restricts the elastic displacement of the moving operation arm 44 into the cartridge main body 24 and also controls the see-through inside the cartridge main body 24 by covering the opening 52.

Then, the erroneous recording prevention member 32 is provided as shown in FIG.
As shown in FIG. 7, the erroneous recording prevention section 41 is positioned on the side facing the erroneous recording detection hole 33,
To hold the slide guide piece 48, and to raise the moving operation arm 44 to the rising peripheral wall 49 and the shielding wall 5.
4 and arranged on the inner surface of the lower half 23 so as to extend between them.

The erroneous recording preventing member 32 arranged on the lower half 23 is formed by sandwiching the slide guide piece 48 between the pair of elastic arms 42 and 43, so that it is securely held by the lower half 23. And easy falling off is prevented. Further, as described above, the erroneous recording prevention member 32 disposed on the lower half 23 is provided with the moving operation unit 4 at the tip of the moving operation arm unit 44.
7 faces the outside of the cartridge main body 24 through the opening 52.

As described above, the erroneous recording preventing member 32 held in the lower half 23 and disposed in the cartridge main body 24.
Is connected to the rear surface 2 of the cartridge main body 24 through the opening 52.
By moving the moving operation portion 47 facing the outside on the 4b side by, for example, pinching, the pair of elastic arm members 4 are moved.
5 are guided by the slide guide piece 48 to be slid in the directions indicated by arrows E and F in FIG.

The erroneous recording preventing member 32 is formed at the tip of one elastic arm 42 as shown in FIG. 5 when the erroneous recording preventing part 41 is in the position where the erroneous recording detecting hole 33 is closed. The locking projection 45 is relatively engaged with the first engagement recess 50 formed in the slide guide piece 48, and keeps the erroneous recording detection hole 33 closed. In a state where the erroneous recording detection hole 33 is closed by the erroneous recording prevention member 32, for example, the erroneous recording detection means arranged on the recording / reproducing apparatus side is prevented from entering the erroneous recording detection hole 33, and An information signal can be recorded on the stored magneto-optical disk 21.

When the erroneous recording prevention member 32 is slid in the direction of arrow E in FIG. 5 and the erroneous recording prevention portion 41 reaches a position where the erroneous recording detection hole 33 is opened, as shown in FIG. The locking ridge 45 formed at the tip of the elastic arm portion 42 is engaged with the second engaging recess 51 formed on the slide guide piece 48 to keep the erroneous recording detection hole 33 open. .

The erroneous recording detection hole 33 is used for the erroneous recording prevention member 3.
2, the recording detection hole 3 provided by the erroneous recording detection means disposed on the recording / reproducing apparatus side, for example.
3 is performed, and the recording of the information signal on the magneto-optical disk 21 stored in the cartridge main body 24 is prohibited.

When the erroneous recording prevention member 32 is moved in the direction to open the erroneous recording detection hole 33 in this manner, the locking ridge 46 formed at the tip of the other elastic arm 43 is moved to the second position.
When the erroneous recording prevention member 32 reaches a position where the erroneous recording detection hole 33 is opened, the erroneous recording prevention member 32 comes into pressure contact with the slide guide piece 48. Therefore, the erroneous recording prevention member 32 is restricted from moving in the direction indicated by the arrow F in FIG. 6 in the direction of closing the erroneous recording detection hole 33, and is reliably held at the position where the erroneous recording detection hole 33 is opened.

The lower half 23 has an arrow F in FIG. 6 in a direction in which the erroneous recording prevention member 32 closes the erroneous recording detection hole 33.
A guide protruding piece 55 is provided for guiding the recording head to move in the direction to close the erroneous recording detection hole 33 when the erroneous recording prevention member 32 is moved.
An inclined guide surface 56 that is guided by the guide protrusion 55 is formed by cutting out a corner portion on the other end side of 1.

In the above-described embodiment, one of the elastic arm portions 4 having the locking ridge portions 45 that engage with the first and second engagement concave portions 50 and 51 formed on the slide guide piece 48 is used.
2, the positions of one elastic arm 42 and the other elastic arm 43 may be reversed as shown in FIG. In this case, the first and second engagement recesses 50 and 51 are also formed on the slide guide piece 48 so as to bulge out on the opposite surface to that of the above embodiment.

In each of the above-described embodiments, a part of the slide guide piece 48 bulges in a concave shape to form the first and second engagement recesses 50 and 51, and the pair of elastic arm portions 4.
The length of each of the first and second engagement recesses 50 and 51 is relatively different from that of the first and second engagement recesses 45 and 51. However, as shown in FIG. 8, concave grooves 50a, 50b and 51a,
The first and second engagement recesses 50 and 51 may be formed by forming 51b. In this case, the pair of elastic arms 42 and 43 have the same length. By forming the pair of elastic arms 42 and 43 and the first and second engagement recesses 50 and 51 in this manner, the locking projections 45 and 46 at the respective distal ends of the pair of elastic arms 42 and 43. Are engaged with the first and second engagement recesses 50 and 51, and both of the pair of elastic arms 42 and 43 have the function of positioning the erroneous recording prevention member 32 while holding the slide guide piece 48. To achieve.

Further, a pair of elastic arm portions 42 and 43 and a slide guide piece 48 for holding the erroneous recording prevention member 32 at a position where the erroneous recording detection hole 33 is closed and opened.
The engagement means for achieving the relative engagement between them may have a configuration reverse to that of the above-described embodiments. That is, as shown in FIG. 9, a part of the slide guide piece 48 is bulged to form cylindrical first and second bulges 61, 62, and each of the pair of elastic arms 42, 43 is formed. Concave engaging concave portions 63, 64 corresponding to the first and second bulging portions 61, 62 on the distal end side.
Is formed, and the erroneous recording prevention member 32 is opened from the position where the erroneous recording detection hole 33 is closed by the relative engagement between the first and second bulging portions 61 and 62 and the engaging concave ridges 63 and 64. You may make it hold | maintain with a position.

In each of the embodiments described above, an example of the disk cartridge in which the magneto-optical disk 21 is stored in the cartridge main body 24 has been described. However, the present invention stores a disk capable of recording information signals. It can be widely applied to disk cartridges.

[0049]

As described above, in the erroneous recording prevention mechanism for a disk cartridge according to the present invention, the erroneous recording prevention member is provided on the cartridge body with a pair of elastic arms independent of the moving operation part. Since the moving operation is performed by being guided by the slide guide piece, a stable moving operation is realized.

Since the erroneous recording prevention member is provided in the cartridge body so that the slide guide piece is sandwiched between the pair of elastic arms, it is ensured that the erroneous recording prevention member is held in the cartridge body. It is possible to reliably prevent the disk cartridge from falling off during and after assembly. Further, the erroneous recording prevention member is held at a position where the erroneous recording detection hole is closed and opened by a relative engagement of at least one of the pair of elastic arms and an engagement means provided between the slide guide piece. Therefore, it is possible to reliably set the recordable state of the information signal and the erroneous recording prevention state that disables the recording.

In particular, the erroneous recording prevention member has a structure in which the slide guide piece is sandwiched by a pair of elastic arms independent of the moving operation portion and is disposed in the cartridge body. Even when it is formed by molding or the like, the slide guide piece can be reliably held between the pair of elastic arms and held in the cartridge body.

Further, in each of the above-described embodiments, an erroneous recording detection hole is provided on the main surface of the cartridge body, and the moving operation portion for moving the erroneous recording detecting member is provided on the back side orthogonal to the main surface of the cartridge body. Since the recording member is exposed, the size of the erroneous recording detection member can be reduced, the storage space in the cartridge body can be reduced, and this is useful when applied to a small disk cartridge.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a disk cartridge to which an erroneous recording prevention mechanism according to the present invention is applied.

FIG. 2 is a perspective view from the front side of the disk cartridge with a shutter member attached.

FIG. 3 is a perspective view of the disk cartridge as viewed from the rear side.

FIG. 4 is an exploded perspective view showing a state in which the erroneous recording prevention member is held in a lower half constituting the cartridge body.

FIG. 5 is a partial plan view showing a state in which an erroneous recording prevention member is held in a lower half of the cartridge body and an erroneous recording detection hole is closed.

FIG. 6 is a partial plan view of the lower half showing a state where the erroneous recording prevention member has been moved to a position where an erroneous recording detection hole has been opened.

FIG. 7 is a partial plan view showing another embodiment of the erroneous recording prevention mechanism according to the present invention.

FIG. 8 is a partial plan view showing still another embodiment of the erroneous recording prevention mechanism according to the present invention.

FIG. 9 is a partial plan view showing still another embodiment of the erroneous recording prevention mechanism according to the present invention.

FIG. 10 is an exploded perspective view showing a conventional erroneous recording prevention mechanism of a disk cartridge.

FIG. 11 is a partial plan view showing the erroneous recording prevention mechanism of the conventional disk cartridge, showing a state in which the erroneous recording prevention member closes an erroneous recording detection hole.

FIG. 12 is a partial plan view showing a state in which an erroneous recording prevention member has opened an erroneous recording detection hole in the erroneous recording prevention mechanism of the conventional disk cartridge.

[Explanation of symbols]

 24 cartridge body 32 erroneous recording prevention member 33 erroneous recording detection hole 41 erroneous recording prevention part 42, 43 elastic arm part 44 moving operation arm part 45, 46 locking ridge 47 moving operation part 48 slide guide piece 50 first member Mating recess 51 Second engaging recess 52 Opening provided in cartridge body

Claims (1)

(57) [Claims] A pair of elastic arms extending from the erroneous recording prevention portion and an opening formed in the cartridge body integrally formed with the erroneous recording prevention portion, at least a part of which faces the erroneous recording prevention portion; An erroneous recording preventing member having a moving operation portion for moving the portion from the outside of the cartridge body; and a cartridge main body for guiding a moving direction of a pair of elastic arms provided on the erroneous recording preventing member. An erroneous recording prevention mechanism for a disc cartridge, comprising: a slide guide piece; and at least one of a pair of arm portions provided on the erroneous recording prevention member and an engaging means provided between the slide guide pieces for relative engagement. .