JPH11232818A - Disk cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize the main body of a cartridge in the disk cartridge which is provided with an window on the main body of cartridge for exposing the disk and also mounted with a shutter for opening/closing this window so as capable of sliding. SOLUTION: On this disk cartridge 2, a lock member 5 for locking the shutter 3 at the closed position is arranged so as elastically deformable on the inside space E of a corner part formed by crossing the side end surface 2b with the front end surface 2a of the cartridge main body 20. An engaging piece 35 capable of engaging with the lock member 5 is projectedly provided on the end part of the side of inside space E. The shutter 3 is pressed to the closing direction by a spring 23. Also, a groove 24 for inserting an unlocking piece which is opened on the front end surface 2a, is formed on the cartridge main body 20, and a free end part of the lock member 5 is retractable against the groove 24 in accordance with the elastical deformation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Conventionally, in an optical disk player for optically recording and reproducing signals for an optical disk or a magneto-optical disk, as shown in FIGS.
Disc (91) on flat rectangular parallelepiped cartridge body (90)
Is used (Japanese Patent Application Laid-Open No. 5-198121).

[0003] A disc (91) is provided in the cartridge body (90).
A window (100) for exposing the signal surface is opened, and a shutter (92) for opening and closing the window (100) is slidably mounted. Inside the cartridge body (90), a lock member (93) for locking the shutter (92) in the closed position is arranged along a side end surface (9a) extending in the sliding direction of the shutter (92). I have. The lock member (93) is
It is elastically displaceable about the base end, and an engagement recess (95) is formed at the tip. Lock member
The tip of (93) is formed with a slope (99) to function when releasing the lock as described later.

On the other hand, the shutter (92) has an engagement piece which can be engaged with the engagement recess (95) of the lock member (93) at the sliding contact with the side end surface (9a) of the cartridge body (90). (96) is protruded. Further, a spring locking piece (98) is protruded from the shutter (92), and a torsion spring (94) is interposed between the spring locking piece (98) and the cartridge body (90), so that the shutter ( 92) is biased in the closing direction.

Usually, in the disk cartridge (9), the engaging recess (95) of the lock member (93) and the engaging piece (96) of the shutter (92) engage with each other, and the shutter (92) is Locked in closed position. When the disc cartridge (9) is inserted into the inner part of the apparatus from the cartridge insertion opening provided in the cabinet of the optical disc player, FIG.
(a) As the disk cartridge (9) shown by the arrow A in FIG.
(97) relatively moves in the direction opposite to the arrow A, enters the cartridge body (90) as shown in the figure, slides on the lock member (93), and elastically displaces the lock member (93).

As a result, the engagement recess (95) of the lock member (93)
Is disengaged from the engagement piece (96) of the shutter (92), and the shutter
The lock of (92) is released. Then, as the disk cartridge (9) further moves forward and reaches the recording / reproducing position at the back of the apparatus, the unlocking piece (97) resists the elasticity of the torsion spring (94) as shown in FIG. Then the shutter (92) is pushed open. In this state, the cartridge body (90)
The signal is recorded or reproduced through the window (100).

Thereafter, in the ejecting operation of the disk cartridge (9), the unlocking piece (97) relatively moves in the direction of the arrow A as the disk cartridge (9) retreats, and the shutter (92) closes. Allow movement.
Therefore, the shutter (92) is biased by the torsion spring (94) and closes as shown in FIG. In the process of closing the shutter (92), the unlocking piece (97) slides on the inclined surface (99) of the lock member (93), and elastically displaces the lock member (93) in the unlocking direction. As a result, at the closed position of the shutter (92) shown in FIG. 16 (a), the engagement recess (95) of the lock member (93) and the engagement piece (96) of the shutter (92) are in the non-engaged state. To face each other. Then, when the disk cartridge (9) further retreats and is pulled out from the cartridge insertion slot, the unlocking piece (97) is released from the lock member (93). As a result, the lock member (93) is elastically restored, and the engagement recess (95) of the lock member (93) and the engagement piece (96) of the shutter (92) are engaged with each other, and the shutter (9)
2) will be locked in the closed position.

[0008]

By the way, in response to the recent demand for miniaturization of the disc player, the recording density and the diameter of the disc have been increased in the disc cartridge. The distance S between the side end surface (9a) of the cartridge body (90) and the outer peripheral edge of the disk (91) shown in FIG. However, conventional disk cartridges
In (9), the leading end of the lock member (93) extends between the side end surface (9a) of the cartridge body (90) and the outer peripheral edge of the disk (91). Element
The engagement recess (95) of (93) and the engagement piece (96) of the shutter (92) had to be engaged and disengaged.
There is a problem that miniaturization of (90) is limited. An object of the present invention is to provide a disk cartridge in which the size of the cartridge body can be further reduced.

[0009]

A disk cartridge according to the present invention comprises a flat rectangular parallelepiped cartridge body (20) rotatably housing a disk-shaped signal recording medium, and the cartridge body (20) comprises: At least one window (22) for exposing the signal surface of the signal recording medium is opened, and a shutter (3) for opening and closing the window (22) is slidably mounted. Of the four corners of the cartridge body (20), a corner formed by intersecting a front end face (2a) orthogonal to the shutter sliding direction and a side end face (2b) extending along the shutter sliding direction. The interior space E of the shutter is elastically displaceable between a locked position and an unlocked position,
A lock member (5) for locking (3) in the closed position is housed and arranged. The shutter (3) has the lock member (5) at the end on the internal space E side toward the internal space E.
An engagement piece (35) capable of engaging with the projection is provided. shutter
(3) is urged in the closing direction by a spring (23).
Further, the cartridge body (20) is formed with an unlocking piece insertion groove (24) which is open on the front end face (2a) and extends from the opening in the shutter sliding direction.
In (24), the free end of the lock member (5) protrudes and retracts with the elastic displacement.

In the above-mentioned disk cartridge of the present invention, the engagement piece of the lock member (5) and the shutter (3) is usually used.
(35) are engaged with each other, and the shutter (3) is locked in the closed position. When the disc cartridge is inserted into the back of the device from the cartridge insertion slot of the optical disc player, the unlocking piece provided at the back of the device moves relatively in the direction opposite to the insertion direction as the disc cartridge moves forward. Into the lock release piece insertion groove (24) of the cartridge body (20),
The lock member (5) slides on the free end of the lock member (5) projecting to 4) and is elastically displaced in the lock release direction. As a result, the lock member (5) is disengaged from the engagement piece (35) of the shutter (3), and the lock of the shutter (3) is released. Then, the disk cartridge further moves forward,
In the process of reaching the recording / reproducing position at the back of the device, the unlocking piece pushes the shutter (3) open against the elasticity of the spring (23). In this state, signal recording or reproduction is performed through the window of the cartridge body (20).

In the ejecting operation of the disk cartridge, the disk cartridge is moved backward as the disk cartridge retreats.
The unlocking piece relatively moves in the direction opposite to the cartridge insertion direction, and allows the shutter (3) to move in the closing direction.
Therefore, the shutter (3) is biased by the spring (23) to close. Further, in the process of closing the shutter (3), the unlocking piece slides on the lock member (5) to elastically displace the lock member (5) in the unlocking direction. As a result, in the closed position of the shutter (3), the locking member (5) and the shutter
The engagement piece (35) of (3) faces each other in a non-engaged state. Then, the disk cartridge (2) further retreats and is pulled out from the cartridge insertion slot, whereby the unlocking piece is released from the lock member (5).
As a result, the lock member (5) returns elastically,
(5) and the engagement piece (35) of the shutter (3) engage with each other,
The shutter (3) will be locked in the closed position.

[0012]

In the disk cartridge according to the present invention, the lock member (5) is housed in the internal space (E) of the corner of the cartridge body (20), which has a margin on the arrangement of the members, and the lock member (5) is engaged with the shutter (3). Lock member (5) to be engaged with mating piece (35)
Of the lock member (5) and the engagement piece (35) of the shutter (3) are also engaged and disengaged in the internal space E. Therefore, when miniaturizing the cartridge body (20), the distance between the side end surface (2b) of the cartridge body (20) and the outer peripheral edge of the disk (21) does not matter. Therefore, by making the distance between the side end face (2b) of the cartridge body (20) and the outer peripheral edge of the disk (21) as close to zero as possible, the cartridge body (20) can be made smaller than before. is there.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to FIGS. In these figures, the direction of insertion of the disc cartridge into the disc player is all indicated by an arrow A.

First Embodiment As shown in FIG. 1, a disk cartridge according to the present invention is provided.
(2) is a flat rectangular parallelepiped resin cartridge body (20)
A disk (21) is rotatably accommodated in the disk drive, and the disk cartridge (2) is inserted into the apparatus from a cartridge insertion slot (11) opened in the cabinet (1) of the disk player. , Signals can be recorded and reproduced.

As shown in FIG. 2, a window (22) for exposing the signal surface of the disk (21) is opened in the cartridge body (20) of the disk cartridge (2).
The shutter (3) that opens and closes the cartridge body (20)
Are slidably mounted along one end face of the slab. still,
On the cartridge body (20), on the opposite side of the window (22),
A window (29) is opened as shown in FIG.
Signal recording and reproduction are performed using (29). As shown in FIG. 2, the cartridge body (20) has an unlocking piece insertion groove (24) recessed along the right end face (2b) in the disk insertion direction A, and An erroneous insertion preventing groove (25) is formed along the end face (2c). The unlocking piece insertion groove (24) and the erroneous insertion prevention groove (25) respectively open in the front end face (2a) of the cartridge body (20) and extend from the opening in the sliding direction of the shutter (3). I have.

On the other hand, an unlocking piece (45) for unlocking the shutter (3) is arranged at the back of the cartridge insertion slot (11) of the cabinet (1). A protrusion (46) for preventing insertion of the disk cartridge (2) when the disk cartridge (2) is inserted in the wrong direction is arranged. By inserting the disk cartridge (2) into the cabinet (1) in the correct direction, Unlocking piece (45)
Enters the unlocking piece insertion groove (24), and the protruding piece (46) enters the erroneous insertion preventing groove (25).

The cartridge insertion slot (1) of the cabinet (1)
The cartridge holder (4) shown in FIGS. 3 and 4 is arranged at the back of (1), and the disk cartridge (2) loaded in the cartridge holder (4) can be moved to a predetermined recording / reproducing position. It has become. The cartridge holder (4) includes a left side wall (48) and a right side wall (47) at both ends of a ceiling wall (41), and a left bottom wall (40) at a lower end of the left side wall (48). At the lower end of the right side wall (47), right bottom walls (49) project inward in parallel with the ceiling wall (41), respectively, so that the disk cartridge (2) can be accommodated and held. I have.

An opening (44) for recording and reproducing signals is provided in the ceiling wall (41) of the cartridge holder (4) at a position to be opposed to the window (22) of the disk cartridge (2). Have been. Also, both side walls (4) of the cartridge holder (4)
At (7) and (48), a total of four pins (42) (42) (43) (43) are projected outward, and these pins (42) (42) (43) (43) are used. Then, the movement of the cartridge holder (4) is performed.
In addition, about the drive mechanism of the cartridge holder (4),
Since it is well known, illustration and description are omitted. Further, the lock release piece (45) is protruded inward from the right side wall (47) of the cartridge holder (4), and the left side wall (4
8), the protruding piece (46) is provided to protrude inward.

As shown in FIGS. 5A and 5B, of the four corners of the cartridge body 20 of the disk cartridge 2,
A shutter is provided in the internal space E at the corner formed by the intersection between the front end surface (2a) and the right end surface (2b) of the cartridge body (20).
A lock member (5) for locking (3) in the closed position is provided. Also, inside the cartridge body (20),
A torsion spring (23) for urging the shutter (3) in the closing direction is disposed, and one end of the torsion spring (23) is connected to a spring engagement piece (36) formed on the shutter (3). While being locked, the other end is locked to a corner of the cartridge body (20).

As shown in FIG. 6, the shutter (3) has a pair of closing plates (31) and (32) for closing the pair of windows (22) and (29) opened in the cartridge body (20). , Both closing plate part (31)
(32) and a connecting portion (33) for connecting the ends of the (32) to each other, and the connecting portion (33) is formed with the spring locking piece (36),
An arm piece (37) projecting toward the internal space E is integrally formed. The arm piece (37) has a sliding piece (3) slidably engaged with the right end face (2b) of the disc cartridge (2).
4) and the engagement piece (35) are protruded toward the inside of the cartridge body (20). The arm piece (37) is shown in FIG.
As shown in (b), it is slidably engaged with a shutter guide groove (26) formed on the back surface of the cartridge body (20). This allows the shutter (3) to slide back and forth along the right end surface (2b) of the cartridge body (20).

As shown in FIG. 6, the lock member (5) includes a boss (51) rotatably fitted on a pivot (28) protruding from the cartridge body (20), and a disc mounted on the boss (51). A slightly thin elastic piece (52) projecting substantially parallel to the surface, and a slightly thick lock piece (53) projected substantially parallel to the disk surface on the boss (51), the lock piece (53) Extends toward the unlocking piece insertion groove (24). In the lock member (5), the elastic piece (52)
With the elastic deformation of the lock piece, the lock piece (53) can be elastically displaced in a plane parallel to the disk surface.

The lock piece (53) of the lock member (5) has a first slope (55) at the base end and a second slope (55) at the tip end toward the right end face (2b) of the cartridge body (20). 56) is formed, and between the first slope (55) and the second slope (56), an engagement recess (54) with which the engagement piece (35) can be engaged is formed. Each of the first slope (55) and the second slope (56) has an end on the side of the engaging recess (54) protruding into the lock releasing piece insertion groove (24), and as described later, the disk cartridge (2) When the disk cartridge (2) moves forward with the reciprocation, the unlocking piece (45) is moved to the first slope.
When the disk cartridge (2) is moved backward, the lock release piece (45) comes into contact with the second slope (56). The tip of the elastic piece (52) of the lock member (5) is in contact with a stopper (27) protruding from the cartridge body (20) as shown in FIGS. Element
The clockwise rotation of (5) is prevented.

FIGS. 7 (a), 7 (b) and 7 (c) show the unlocking operation of the lock member 5 and the opening operation of the shutter 3 as the disk cartridge 2 moves forward. FIG. 7A shows a disk cartridge (2) in a cabinet.
(1) shows a state in which it has not yet been inserted into the engagement member (54) of the lock member (5) and the engagement piece of the shutter (3).
(35) are engaged with each other, and the shutter (3) is locked in the closed position.

From this state, the disk cartridge (2)
When the lock release piece (45) is inserted into the back of the cabinet (11) through the cartridge insertion slot (11), the unlocking piece (45) moves in the direction opposite to the arrow A as shown in FIG. The lock release piece (45) moves into the lock release piece insertion groove (24) of the disk cartridge (2) and comes into contact with the first slope (55) of the lock member (5). Then, as the disk cartridge (2) further advances, the unlocking piece (45) presses the first slope (55), and the locking member
(5) is elastically displaced as indicated by the arrow. As a result, the engagement concave portion (54) of the lock member (5) is disengaged from the engagement piece (35) of the shutter (3), and the lock of the shutter (3) is released.

Thereafter, when the disk cartridge (2) further advances, the unlocking piece (45) is released from the shutter.
(3) abuts on the end of the disc cartridge
With the forward movement of (2), as shown in FIG. 7C, the shutter (3) is pushed and opened against the elasticity of the torsion spring (23). In this state, the disc cartridge
(2) is chucked at the signal recording / reproducing position, and the windows (22) (2)
A signal is recorded on the disk (21) through 9), or a signal is reproduced from the disk (21).

In the ejecting operation of the disk cartridge (2), the unlocking piece (45) relatively moves in the direction of arrow A with the backward movement of the disk cartridge (2).
The shutter (3) is allowed to move in the closing direction. Therefore,
The shutter (3) is biased by the torsion spring (23) and closes as shown in FIG. 7 (b). In the process of closing the shutter (3), the unlocking piece (45) slides on the second slope (56) of the lock member (5), and the lock member (5) is moved in the direction of the arrow in FIG. Elastic displacement As a result, as shown in the figure, the engagement recess (54) of the lock member (5) and the engagement piece of the shutter (3)
(35) are opposed to each other in a disengaged state. Then, when the disk cartridge (2) further moves backward and is pulled out from the cartridge insertion slot, as shown in FIG.
As shown in (a), the unlocking piece (45) is detached from the lock member (5). As a result, the lock member (5) is elastically restored, the engagement recess (54) of the lock member (5) is engaged with the engagement piece (35) of the shutter (3), and the shutter (3) is closed. Will be locked in position.

As described above, according to this embodiment, the lock member (5) is provided with a cartridge
(20) The tip of the lock member (5) which is housed in the inner space E of the corner and is to be engaged with the engagement piece (35) of the shutter (3) is also contained in the inner space E. The engagement and disengagement of the locking member (5) with the engagement piece (35) of the shutter (3) is also performed in the internal space E. Therefore, when the cartridge body (20) is downsized, the cartridge body ( 20) Side end face (2b) and disc
The distance between the outer edges of (21) does not matter. Therefore, by making the distance between the side end face (2b) of the cartridge body (20) and the outer peripheral edge of the disk (21) as close to zero as possible, the cartridge body (20) can be made smaller than before. is there.

Second Embodiment In this embodiment, instead of the lock member (5) in the first embodiment, a lock member (6) molded integrally with the cartridge body (20) as shown in FIGS. Is arranged.
Since the other configuration is completely the same as that of the first embodiment, only the configuration and operation of the lock member (6) will be described, and illustration and description of the other configuration will be omitted. 8 and 9, the same members as those in the first embodiment are denoted by the same reference numerals.

As shown in FIG. 8, a lock member (6) is provided at the upper end of a support (61) extending vertically from the cartridge body (20) on an elastic portion (62) curved in a plane perpendicular to the disk surface. ), A lock portion (63) extending along the disk surface is formed, and the elastic portion (62) elastically deforms the lock portion (63) in a direction perpendicular to the disk surface as shown by the arrow. Elastically displaced.

The lock portion (63) of the lock member (6) has a first slope (6) on the base end side toward the back surface of the cartridge body (20).
5), a second slope (66) is formed on the distal end side, and between the first slope (65) and the second slope (66), an engagement recess (64) with which the engagement piece (35) can engage. ) Is formed. The first slope (65) and the second slope (6
6), the end on the side of the engaging recess (64) is the unlocking piece insertion groove.
(24), and the unlocking piece (45) slides on the first slope (65) and the second slope (66) as the disc cartridge (2) reciprocates as in the first embodiment. , Lock member
The engagement recess (64) of (6) and the engagement piece (35) of the shutter (3) are engaged and disengaged.

For example, as shown in FIG. 9 (a), when the disk cartridge (2) moves forward in the direction of the arrow A, the unlocking piece (45) first moves to the first slope of the lock member (6).
(65) and the disk cartridge (2) further advances, whereby the unlocking piece (45) pushes up the lock portion (63) of the lock member (6) as shown in FIG. (64)
Is moved to the unlock position. When ejecting the disk cartridge (2), the lock release
(45) comes into contact with the second slope (66) of the lock member (6) to move the lock portion (63) to the unlock position.

In this embodiment, since the lock member (6) is formed integrally with the cartridge body (20), the first member is formed.
The number of parts is reduced as compared with the embodiment, and the manufacturing cost can be reduced. Further, since the elastic displacement direction of the lock portion (63) of the lock member (6) is set in a direction orthogonal to the first embodiment, that is, in a direction orthogonal to the disk surface, the lock member (6) Insert the engaging recess (64) into the engaging piece (3) of the shutter (3).
The amount of elastic displacement required to disengage from
The thickness may be set slightly larger than the plate thickness in 5), and the amount of elastic displacement required in the first embodiment, that is, the engagement piece (35) is
(64) is much smaller than the engagement depth. As the lock member (6) is integrally molded with the cartridge body (20), the lock member (6) is formed of the same resin material as the cartridge body (20). Since the locking and unlocking is possible with a slight elastic deformation of the portion (63), the material of the cartridge body (20) and the lock member (6) is relatively necessary to maintain the shape of the cartridge body (20). There is no problem in using a hard resin.

Third Embodiment This embodiment is directed to a disk cartridge (hereinafter, referred to as a first disk cartridge) employed in the first embodiment.
On the other hand, a disk cartridge of a new standard having the same outer dimensions but different recording / reproducing methods (hereinafter referred to as a second disk cartridge) and the disk player described in the first embodiment (hereinafter referred to as a first disk player) Said
In contrast, a dedicated disk player (hereinafter, referred to as a second disk player) that performs recording and reproduction of a second disk cartridge, and a disk player that can record and reproduce both the first disk cartridge and the second disk cartridge ( Hereinafter, a dual-use disc player). In FIGS. 11 to 15 showing this embodiment, the same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In the present embodiment, the following conditions must be satisfied in relation to the disc player and the disc cartridge. The first disk player can insert the first disk cartridge, but cannot insert the second disk cartridge. The second disk player can insert the second disk cartridge, but cannot insert the first disk cartridge. Both the first disk cartridge and the second disk cartridge can be inserted into the dual-purpose disk player.

As shown in FIG. 10, in the first disk cartridge (2), the front end surface (2a) of the cartridge body (20)
Has an erroneous insertion preventing groove (25) having a predetermined depth Dm extending along the right end surface (2b) at a position slightly deviated to the front side, so that the disk cartridge (2) is erroneously inserted. When trying to insert the disc cartridge 2 in the orientation, the above-mentioned protruding piece 46 hits the front end face 2a of the cartridge main body 20 to prevent the disc cartridge 2 from being erroneously inserted. In addition, the lock release piece insertion groove (24) is also provided on the front end face (2a) of the cartridge body (20).
Since the projecting piece (46) is slightly biased toward the front surface side, there is no possibility that the projecting piece (46) enters the unlocking piece insertion groove (24) and erroneous insertion is allowed.

On the premise of the first disk cartridge (2), the second disk cartridge, the second disk player, and the dual-purpose disk player employ the following configuration. That is, the second disk cartridge
In (7), as shown in FIG. 11, the erroneous insertion preventing groove (25) shown in FIG.
Insertion groove (7) having a depth Da smaller than the depth Dm
1) is formed. On the back surface of the cartridge body (70) of the disk cartridge (7), a cartridge identification groove (72) having a predetermined depth, which is open to the front end surface (2a) and extends in the direction opposite to the arrow A, is formed. I have.

On the other hand, in the second disc player,
The cartridge holder (8) shown in FIG. 12 is employed. On the left side wall (48) of the cartridge holder (8), a protruding piece (81) to be inserted into the erroneous insertion prevention groove (25) is located at a position corresponding to the depth Da of the erroneous insertion prevention groove (25). , Protruding inward. Therefore, the position of the projecting piece (81) is closer to the back of the apparatus than the position of the projecting piece (46) in the cartridge holder (4) of the first disk player shown in FIG.

If the second disk cartridge (7) is not inserted into the cartridge holder (4) of the first disk player, an erroneous insertion preventing groove of the second disk cartridge (7) is provided.
(71) is an erroneous insertion prevention groove of the first disk cartridge (2).
(Da <Dm), the projecting piece (46) of the cartridge holder (4) hits the back end of the erroneous insertion preventing groove (71) of the second disk cartridge (7) during the insertion. The above insertion is prevented. This satisfies the above condition.

As shown in FIG. 13, when the second disk cartridge (7) is inserted into the cartridge holder (8) of the second disk player, the projection of the cartridge holder (8)
(81) penetrates into the erroneous insertion preventing groove (71) of the disk cartridge (7), and the protrusion (82)
Is the cartridge identification groove (72) of the disk cartridge (7).
Then, the disk cartridge (7) is loaded into the cartridge holder (8). On the other hand, the first disk player has the first cartridge holder (8).
When the disk cartridge (2) is not inserted, the cartridge discrimination groove (72) is not formed in the first disk cartridge (2), so that the projection (82) of the cartridge holder (8) is inserted into the first disk cartridge (2). The first disk cartridge (2) is prevented from being inserted into the front end surface (2a) of (2). This satisfies the above condition.

As shown in FIG. 14, in the dual-use disc player, the back (83) of the left bottom wall (40) of the cartridge holder (85) is located at the same position as the projection (82) of the second disc player. , An on / off switch (86) is provided. The cartridge holder (85) is provided with a projection (81) at the same position as the second disk player.

When the first disk cartridge (2) is inserted into the cartridge holder (85), the projecting piece (81) of the cartridge holder (85) is inserted into the erroneous insertion prevention groove (25) of the first disk cartridge (2). At the same time, the on / off switch (86) is pushed down below the surface of the left bottom wall (40) by the bottom surface of the first disk cartridge (2), and the insertion of the first disk cartridge (2) is allowed. Where on /
When the off switch (86) is pushed from the off state (projected state) to the on state, the first disk cartridge is turned on.
The detection signal of (2) is obtained.

When the second disk cartridge (7) of the cartridge holder (85) is inserted, the projecting piece (81) of the cartridge holder (85) is inserted into the erroneous insertion preventing groove (71) of the second disk cartridge (7). ) Enters, an on / off switch (86) is accommodated in the cartridge identification groove (72) of the second disk cartridge (7), and the insertion of the second disk cartridge (7) is allowed. Here, the on / off switch (86) maintains the off state.
It is possible to detect the loading of the disk cartridge (7).

In this way, the above condition is satisfied. In the case of adopting another method for disc discrimination, for example, a discrimination method based on a difference in the depth of the erroneous insertion prevention grooves (25) and (71), a discrimination method based on a disc signal recording format, and the like, The on / off switch (86) can be omitted.

According to this embodiment, only the recording and reproduction of the first disk cartridge are performed for the first and second disk cartridges having the same external dimensions but different recording / reproducing methods. A first disc player capable of recording and a second disc player capable of recording and reproducing only the second disc cartridge,
A dual-purpose disk player capable of recording and reproducing data on both disk cartridges can be realized with a very simple configuration difference.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a disk cartridge and a part of a disk player for performing recording and reproduction of the disk cartridge.

FIG. 2 is a perspective view of a disk cartridge according to the first embodiment.

FIG. 3 is a perspective view of a cartridge holder according to the first embodiment.

FIG. 4 is a front view of the cartridge holder.

FIG. 5 is a plan view (a) and a rear view (b) of the disk cartridge.

FIG. 6 is an enlarged perspective view showing a main part of the disk cartridge.

FIG. 7 is a partially broken plan view showing the operation of the disk cartridge.

FIG. 8 is an enlarged perspective view illustrating a main part of a disk cartridge according to a second embodiment.

FIG. 9 is a partially broken side view showing the operation of the lock member of the disk cartridge.

FIG. 10 is a perspective view of a first disk cartridge employed in the first embodiment.

FIG. 11 is a perspective view of a second disk cartridge employed in the third embodiment.

FIG. 12 is a partially cutaway perspective view of a cartridge holder of a second disk player employed in the third embodiment.

FIG. 13 is a front view of the cartridge holder.

FIG. 14 is a partially cutaway perspective view of a cartridge holder of a dual-use disc player employed in the third embodiment.

FIG. 15 is a front view of the cartridge holder.

FIG. 16 is a plan view showing the structure and operation of a conventional disk cartridge.

[Explanation of symbols]

 (1) Cabinet (2) Disk cartridge (21) Disk (20) Cartridge body (24) Lock release piece insertion groove (25) Mis-insertion prevention groove (3) Shutter (35) Engagement piece (23) Torsion spring (5 ) Lock member (54) Engagement recess (4) Cartridge holder (45) Unlocking piece (46) Projection piece (6) Locking member (64) Engagement recess (7) Second disk cartridge (71) Mis-insertion prevention groove (72) Cartridge identification groove (8) Cartridge holder (81) Projection piece (82) Projection (86) On / off switch

Claims (1)

[Claims] 1. A flat rectangular parallelepiped cartridge body (20)
A disk-shaped signal recording medium is rotatably housed in the
At least one window (22) for exposing the signal surface of the signal recording medium is opened in the cartridge body (20), and a shutter (3) for opening and closing the window (22) is slidably mounted. Of the four corners of the cartridge body (20), a front end face (2a) orthogonal to the shutter sliding direction and a side end face (2b) extending along the shutter sliding direction intersect. A lock member (5) disposed in the inner space E of the corner portion formed so as to be elastically displaceable between a lock position and an unlock position, and for locking the shutter (3) in the closed position; An internal space E is provided at an end of the shutter (3) on the internal space E side.
An engagement piece (35) protruding toward the lock member (5), a spring (23) for urging the shutter (3) in a closing direction, and a front end of the cartridge body (20). Opening on the surface (2a),
The lock member extends from the opening in the shutter sliding direction.
(5) A disk cartridge, characterized in that the free end of the disk cartridge has an unlocking piece insertion groove (24) to be protruded and retracted with the elastic displacement.