JP2003151200A - Recording and/or playing-back device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a structure and also to appropriately eject a disk cartridge to the outside of a main body part without giving a chassis a load. SOLUTION: An ejection mechanism 33 for ejecting a disk cartridge held by a holder 4 to the outside of the device main body 2 is provided at the holder side to provide a structure that prevents the load of a pulling coil spring 35 constituting the ejection mechanism 33 from transferring to a mechanical chassis 5. This gives broad options for materials to the mechanical chassis 5 so that the mechanical chassis 5 can be made of light molded plastics.

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 such as a disk player for recording and / or reproducing signals on a disk-shaped recording medium rotatably housed in a disk cartridge.

[0002]

2. Description of the Related Art Conventionally, there is known a portable disk player capable of recording and reproducing information signals such as audio signals on a magneto-optical disk rotatably housed in a disk cartridge.

This type of disc player has a main body of the apparatus and a lid body which is openably and closably mounted on the main body of the apparatus. The lid body is opened and a disc cartridge is inserted into the main body of the apparatus. After that, the magneto-optical disk can be attached to the apparatus main body by closing the lid. On the other hand, when the disc cartridge is taken out of the apparatus body, the lid body is opened to allow the disc cartridge to be ejected to the outside of the apparatus body.

Specifically, in this disc player, the holder for holding the disc cartridge between the inserting / removing position where the disc cartridge is inserted and removed and the mounting position where the magneto-optical disc is mounted, and the lid body are in the open state. When
An eject mechanism for ejecting the disc cartridge held by the holder to the outside of the main body of the apparatus.

Further, this disc player has a disc rotation drive mechanism for rotationally driving a magneto-optical disc mounted on the main body of the apparatus, and a recording / reproduction of an information signal with respect to the magneto-optical disc rotationally driven by the disc rotation drive mechanism. The recording / reproducing mechanism for performing the above-mentioned operation and the feeding mechanism for feeding the recording / reproducing mechanism in the radial direction of the magneto-optical disk are provided, and these are mounted on the mechanical chassis of the apparatus main body.

Of these, the disk rotation drive mechanism has a disk table on which a magneto-optical disk is mounted, and a spindle motor for rotationally driving the disk table. The recording / reproducing mechanism is an optical pickup that irradiates a main surface of the magneto-optical disk with laser light during recording or reproduction, and is arranged to face the optical pickup.
It has a magnetic head for applying an external magnetic field to the other main surface of the magneto-optical disk at the time of recording, and a head elevating mechanism for moving and operating the magnetic head in a direction in which it can be brought into contact with and separated from the magneto-optical disk. The feed mechanism includes a feed base that supports the optical pickup and the magnetic head, a support shaft that movably supports the feed base in the radial direction of the magneto-optical disk, and a drive mechanism that moves and operates the feed base along the support shaft. And have.

In the disc player constructed as described above, when the magneto-optical disc is rotationally driven by the disc rotation drive mechanism, the recording / reproducing mechanism is fed by the feeding mechanism in the radial direction of the magneto-optical disc while recording / reproducing. The mechanism records and reproduces information signals on and from the magneto-optical disk.

[0008]

By the way, in the conventional disc player, the eject mechanism described above is mounted on the mechanical chassis. Therefore, in the conventional disc player, there is a problem in that the mechanical strength (rigidity) of the mechanical chassis is restricted by the material and the configuration. Especially in a mechanical chassis that requires high accuracy in the mounting of spindle motors and optical pickups, the mechanical chassis is made of sheet metal because the biasing force of the springs that make up the eject mechanism is always applied to the mechanical chassis. Therefore, it was necessary to secure mechanical strength (rigidity).

However, when the mechanical chassis is made of sheet metal, not only is the weight increased, but also parts and the like for mounting the motors, gears, etc. that make up the above-mentioned mechanisms are required. For this reason, in a portable disc player in which the overall size and weight of the device are desired to be reduced, it is difficult to reduce the size and weight due to an increase in the number of parts, and the number of assembling steps is increased. There was a problem of being bulky.

Therefore, the present invention has been proposed in view of such a conventional situation, and simplifies the structure and properly ejects the disk cartridge to the outside of the main body without applying a load to the chassis. It is an object of the present invention to provide a recording and / or reproducing device capable of performing the above.

[0011]

To achieve this object, a recording and / or reproducing apparatus according to the present invention records a signal on a disc-shaped recording medium rotatably housed inside a disc cartridge. And / or reproducing, and the main body portion, a lid body that is openable / closable with respect to the main body portion, and the disc cartridge of the main body portion is inserted / removed when the lid body is opened. A holder that holds the disc cartridge between the insertion / removal position and the mounting position where the disc-shaped recording medium of the main body is mounted when the lid is in the closed state; Ejecting means for ejecting the disc cartridge held by the holder to the outside of the main body when the lid state is established. The eject means has a pressing portion that abuts against the disc cartridge at one end and a fulcrum portion that abuts against the holder at the other end, and is rotatably supported by the holder between the one end and the other end. The eject lever and the pushing part urge the eject lever toward one side in the rotating direction so that the pushing part pushes in the direction of ejecting the disc cartridge, and one side comes close to the holder with the fulcrum as a fulcrum. The disc cartridge has a biasing means for tilting the eject lever in a direction in which the other is separated from the holder, a locking portion provided on the holder, and a locked portion provided on one of the eject levers. When it is inserted into the main body, it comes into contact with the pressing part, and the eject lever rotates to the other side in the rotation direction against the bias of the biasing means, and the locked part is locked by the locked part. Department When the locking means for locking and the lid body are in the opened state, the other one of the eject levers is pressed in a direction of approaching the holder, and one of the eject levers is separated from the holder with the fulcrum portion as a fulcrum. And a lock releasing means for releasing the locked state of the locked portion with respect to the locking portion by pushing up in the direction.

As described above, in the recording and / or reproducing apparatus according to the present invention, when the disc-shaped recording medium is mounted on the main body, the lid is opened and the disc cartridge is inserted into the main body. Causes the disc cartridge to come into contact with the pressing portion of the eject lever, and the eject lever rotates to the other side in the rotation direction against the bias of the biasing means, so that the locked portion of the eject lever moves to the holder. It is locked by the locking portion provided. As a result, the rotation of the eject lever urged by the urging means toward one side is locked and the disc cartridge is held by the holder. Then, by closing the lid, the disc cartridge together with the holder is moved from the insertion / removal position of the main body to the mounting position, and the disc-shaped recording medium is mounted on the main body.

On the other hand, when the disc cartridge is taken out from the main body, the lid body is opened to move the disc cartridge together with the holder from the mounting position to the inserting / removing position. At this time, the other one of the eject levers is pressed in a direction of approaching the holder, and one of the eject levers is pushed up in a direction of separating from the holder with the fulcrum portion as a fulcrum. As a result, the locked state of the locked portion of the eject lever with respect to the locking portion of the holder is released, the eject lever is urged by the urging means to rotate to one side in the rotation direction, and the pressing portion is The disc cartridge is ejected to the outside of the main body while pressing the disc cartridge.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

A portable disc player (hereinafter referred to as a disc player) 1 shown in FIG. 1 as an embodiment of the present invention is a magneto-optical disc of about 64 mm accommodated in a disc cartridge having a rectangular flat shape. A recording and / or reproducing apparatus (electronic device) capable of recording (recording) or reproducing an audio signal, which is portable by reducing its size and weight.

Here, in the disc cartridge, a magneto-optical disc is rotatably accommodated inside a cartridge body composed of an upper shell and a lower shell, and the surfaces of the upper shell and the lower shell which face each other are opposed to each other. Each of the magneto-optical disks has an opening for recording / reproducing which is formed so as to face the outer circumference of the inner / outer circumference. A shutter member for opening and closing the recording / reproducing opening is slidably attached to the cartridge body. In addition, a lock piece that locks the slide of the shutter member is swingably provided between the locking position and the non-locking position when the shutter member is closed. A chucking plate is attached to the center of the magneto-optical disk, and a drive opening is formed in the lower shell so that the chucking plate faces the outside.

This disc player 1 is shown in FIGS.
As shown in FIG. 3, the apparatus main body 2 and the lid 3 that can be opened and closed with respect to the apparatus main body 2 are provided.

The apparatus main body 2 includes an insertion / removal position where the disk cartridge of the apparatus main body 2 is inserted / removed when the lid 3 is in the open state and an apparatus main body 2 when the lid 3 is in the closed state. Holder 4 for holding the disc cartridge between the mounting position where the magneto-optical disc is mounted, a mechanical chassis 5 for movably supporting the holder 4 between the inserting / removing position and the device position, and the mechanical chassis 5 While supporting
A set chassis 6 that movably supports the holder 4 between the insertion / removal position and the device position and a wiring board 7 held by the set chassis 6 are provided when the lid body 3 is closed. In addition, it is housed inside a housing 8 that forms a pair of case bodies with the lid body 3.

Further, the apparatus main body 2 can be equipped with a primary battery or a secondary battery as an internal power source.
For this reason, a battery case 9 for accommodating these batteries is attached to the set chassis 6, and a battery lid 10 with the battery case 9 facing outward is attached to the case 8 so as to be openable and closable. There is. The ± electrode terminals (not shown) attached to both ends of the battery case 9 are electrically connected to the wiring board 7.

Further, the apparatus main body 2 is connected to an external power source (AC adapter) so that the power can be supplied from the external power source and the internal power source can be charged.
Particularly, in this disc player 1, apart from the charging plug for the external power source being inserted into the external charging jack 11 provided on the bottom surface of the housing 8, the charging stand 200 connected to the charging plug for the external power source is provided. Receiver 200a
By mounting the disc player 1 in the positioned state, it is possible to connect to the external power source.

Therefore, in addition to the external charging jack 11 described above, the charging stand 20 is provided on the bottom surface of the housing 8.
A charging jack 12 for a stand, which is connected to a charging plug (not shown) protruding from the receiving portion 200a of 0, is provided. Specifically, these charging jacks 11,
12 is a plug insertion / removal opening 11a for inserting / removing the charging plug,
12a is mounted along the edge of the wiring board 7 so as to be exposed to the outside from the openings 11b and 12b formed in the housing 8.

The disc player 1 automatically discriminates whether the internal power source is a primary battery or a secondary battery, and is charged only when the secondary battery is mounted in the battery case 9. There is. Therefore, in the apparatus main body 2, the charging plug of the external power supply or the charging plug of the charging stand 200 is inserted into the external charging jack 11 or the charging plug 12 for the stand to switch between the internal power supply and the external power supply. A mechanical switching mechanism and an electronic circuit for discriminating between a primary battery and a secondary battery and electrically switching between a charged state and an uncharged state with respect to the internal power source are provided.

The device body 2 is located on a side surface of the housing 8 and has an output jack (LINE OUT) connected to an output jack 13 connected to an earphone, a speaker or the like, and an input jack (LINE OUT).
IN), an optical jack 14 that is optically connected to peripheral devices by an optical cable, an input jack 15 that is electrically connected to peripheral devices by a wiring cable,
A USB (Universal Serial Bus) jack 16 and the like are provided. And these jacks 13, 14, 1
Reference numerals 5 and 16 denote plug insertion / removal openings 13a for inserting / removing plugs.
Opening 1 in which 14a, 15a, 16a are formed in the housing 8
From outside 3a, 14b, 15c, 16d,
It is attached along the edge of the wiring board 7. Further, the housing 8 has a plug insertion / removal port 1 for the USB jack 16.
A protective cap 17 for protecting 6a is attached so as to be openable and closable.

On the other hand, the lid 3 has operation buttons 18 and 1 for performing various operations such as recording, reproduction, editing, and volume adjustment.
9 and 20, operation switches 21 and 22, a liquid crystal display panel 23 for displaying the operating status, the remaining power of the internal power supply, and the like are provided.

As shown in FIGS. 2 and 3, the holder 4 is made of sheet metal and has a top plate portion 4a facing the upper shell of the disc cartridge, and both side edges of the top plate portion 4a to both side surface portions of the disc cartridge. A pair of side plate portions 4b, 4c for holding the disc, and a bottom plate portion 4d for receiving the inserted disc cartridge held by the pair of side plate portions 4b, 4c. It has an inner shape corresponding to the cartridge. Then, the holder 4 includes a pair of side plate portions 4
b and 4c have support shafts 24 at the end portions on the side of the bottom plate 4d, and the support shafts 24 are pivotally supported by a pair of bearings 25 provided on the mechanical chassis 5, whereby the main surface of the mechanical chassis 5 is formed. On the other hand, it is swingably supported between the insertion / removal position and the mounting position.

The top plate 4a of the holder 4 has
A first leaf spring portion 26 for pressing the disc cartridge held by the holder 4 toward the main surface side of the mechanical chassis 5,
The operation buttons 18, 19, 20 and the operation switch 2 described above
1. A state in which the second leaf spring portion 27 and the third leaf spring portion 28 that press the wiring substrate (not shown) to which the liquid crystal display panel 23 and the like are attached toward the lid 3 can be elastically displaced. Is formed to project. These first to third leaf spring portions 2
6, 27 and 28 are formed integrally with the top plate portion by punching out the periphery and bending in the pressing direction. Further, an opening 29 for a head corresponding to the recording / reproducing opening of the disk cartridge is formed in the top plate 4a.

The holder 4 is provided with a shutter opening / closing mechanism 30 for opening / closing the shutter member of the disk cartridge.

Specifically, this shutter opening / closing mechanism 30
On one side plate portion 4b, a lock release piece 31 for releasing the locked state of the lock piece with respect to the shutter member of the disc cartridge inserted into the holder 4, and the shutter in which the locked state of the lock piece is released by this lock release piece. The elastic displacement piece 32 is engaged with the member.

The unlocking piece 31 is formed so as to project inward of the holder 4 by bending a part of the one side plate portion 4b.

The elastic displacement piece 32 is formed integrally with the one side plate portion 4b by punching out the periphery thereof, and a part of the tip portion is held so as to be engaged with the shutter member of the disk cartridge. 4 has a bent shape protruding inward.

The holder 4 holds the disk cartridge when the lid 3 is opened.
An ejecting mechanism 33 for discharging to the outside is provided.

As shown in FIGS. 2, 3 and 4, the eject mechanism 33 includes an eject lever 34 rotatably supported by the top plate portion 4a of the holder 4 and a direction in which the eject lever 34 is rotated. It has a tension coil spring 35 which is a biasing means for biasing to one side.

The eject lever 34 is composed of an elongated flat plate member, and a support shaft 36 is provided between one end and the other end in the vicinity of a corner portion on the side of the other plate 4c of the top plate 4a and the bottom plate 4d. It is rotatably supported via.

Further, the eject lever 34 has a pressing piece portion 37 which is bent toward the inside of the holder 4 through a guide slit 38 formed in the top plate portion 4a at one end,
The other end has a fulcrum convex portion 39 that comes into contact with the top plate portion 4a. Of these, the guide slit 38 is formed in a substantially arc shape from the end portion of the top plate portion 4a on the bottom plate portion 4d side to the midway portion in the insertion direction of the disc cartridge, and the pressing piece portion 37 is provided with an eject lever. By rotating 34, it is possible to move within this slit 38.

The tension coil spring 35 has a first hooking piece 4 whose one end 35a is formed on the other end of the eject lever.
The other end 35b is hooked on the second hooking piece 41 formed on the top plate 4a on the side opposite to the first hooking piece 40 with respect to the fulcrum convex portion 39. By doing so, the eject lever 34 is urged to one side in the rotating direction so that the pressing piece portion 37 presses in the direction of ejecting the disc cartridge.

The tension coil spring 35 is shown in FIG.
As shown in, a linear portion is provided on the one end portion 35a side,
The other end 35b is hooked at a position closer to the top plate 4a than the one end 35a. Therefore, the eject lever 34 is, due to the urging force of the tension coil spring 35, one side being close to the top plate portion 4a of the holder 4 with the fulcrum convex portion 39 being a fulcrum and the other being the top plate portion 4 of the holder 4.
It is inclined in a direction away from a.

As shown in FIGS. 3 and 4, the eject mechanism 33 has a lever lock mechanism 42 for locking the one-sided rotation of the eject lever 34 urged by the tension coil spring 35. ing.

The lever lock mechanism 42 comprises a locked piece portion 43 provided on one side of the eject lever 34 and a locking projection portion 44 provided on the top plate portion 4a of the holder 4. Of these, the locked piece portion 43 is formed so as to project from the fulcrum convex portion 39 toward the other end portion 35b of the tension coil spring 35. On the other hand, the locking convex portion 44 is formed so as to project from the top plate portion 4a toward the eject lever 34, is in sliding contact with the locked piece portion 43, and is on the other side in the rotating direction of the eject lever 34. It has an inclined surface portion 44a that rises toward the top, and a locking surface portion 44b that locks the locked piece portion 43 at the other end of the inclined surface portion 44a.

Further, the eject mechanism 33 is shown in FIG.
As shown in FIGS. 4 and 5, the lever lock release mechanism 45 has a lever lock release mechanism 45 for releasing the locked state between the locked piece 43 and the locking protrusion 44 of the lever lock mechanism 42 described above.

This lever lock release mechanism 45 is provided with a lock release piece portion 46 provided on the other side of the eject lever 34.
And the ratchet plate 47 attached to the mechanical chassis 5.
It is composed of and. Of these, the unlocking piece 4
Reference numeral 6 is formed so as to project toward the opposite side of the fulcrum convex portion 39 from the locked piece portion 43, that is, toward the other side plate portion 4c of the holder 4, and is bent along the other side plate portion 4c to form a tip end. The portion has a shape protruding slightly outward from the other side plate portion 4c. The ratchet plate 47 has a shape bent from the side end portion of the mechanical chassis 5 along the other side plate portion 4c of the holder 4, and has a tip end portion that is bent so as to come into contact with the tip end portion of the unlocking piece portion 46. ing.

As shown in FIGS. 2 and 6, the mechanical chassis 5 constitutes a storage space in which the disc cartridge is stored together with the holder 4 described above. For this reason, a plurality of positioning pins 48 for positioning the disk cartridge are formed in a protruding manner on the main surface of the mechanical chassis 5 facing the holder 4. In addition, in the disc cartridge,
Positioning recesses (not shown) corresponding to the plurality of positioning pins 48 are provided. The mechanical chassis 5 has an opening 2 for the head of the holder 4 described above.
An opening 49 for a pickup is formed at a position opposed to 9.

The mechanical chassis 5 has a disk rotation driving mechanism 50 for rotating the magneto-optical disk housed in the disk cartridge, and a magneto-optical disk rotationally driven by the disk rotation driving mechanism 50. Recording / reproducing mechanism 5 for recording or reproducing information signals
1 and a feeding mechanism 52 for feeding the recording / reproducing mechanism 51 in the radial direction of the magneto-optical disk.

The disk rotation drive mechanism 50 has a spindle motor 53 attached to a substantially central portion of the mechanical chassis 5.
And a rotation shaft of the spindle motor 53 (not shown).
And a disk table 54 attached thereto. The disk table 54 is provided with a permanent magnet, and when the disk cartridge is housed in the apparatus main body 2, the chucking plate of the magneto-optical disk is attracted to the permanent magnet, so that the magneto-optical disk. Are mounted on the disc table 54.

The recording / reproducing mechanism 51 is arranged opposite to the optical pickup 55 for irradiating the main surface of the magneto-optical disk with a laser beam at the time of recording or reproducing, and at the same time, the recording / reproducing mechanism of the magneto-optical disk is recorded at the time of recording. The magnetic head 56 applies an external magnetic field to the other main surface.

Although not shown, the optical pickup 55 has an optical system for irradiating the magneto-optical disk with laser light, and the surface facing the magneto-optical disk is irradiated with this optical system. An objective lens is provided for converging the generated laser light on the signal recording surface of the magneto-optical disk. Further, the optical pickup 55 has a biaxial actuator that displaces the objective lens in the optical axis direction of the objective lens and in a direction substantially orthogonal to the optical axis direction of the objective lens.

The magnetic head 56 is attached to the tip of the head attachment arm 57 so as to be opposed to the objective lens of the optical pickup via the magneto-optical disk. The head mounting arm 57 is made of an elastically displaceable material, and is slightly bent toward the head opening 29 of the holder 4. The magnetic head 56 is configured to come into contact with or approach the surface of the magneto-optical disk opposite to the surface facing the optical pickup only during recording by a head elevating mechanism 78 described later.

The feeding mechanism 52 supports the optical pickup 55, and the magnetic head 56 via the connecting arm 58.
And a pair of a main shaft 60 and a sub shaft 61 that support the feed base 59 movably in the radial direction of the magneto-optical disk.

The feed base 59 is arranged so that the optical pickup 55 faces outward from the pickup opening 49 of the mechanical chassis 5, and is a pair of pairs arranged substantially parallel to the radial direction of the magneto-optical disk. Main shaft 60 and counter shaft 6
1 is movably supported in the opening 49.
Specifically, the feed base 59 has a support portion 62 having a guide hole 64 inserted into the main shaft 60 and a sub shaft 61.
A pair of support piece portions 63 that sandwich the above are formed to project.

The main shaft 60 is a screw screw, and both ends thereof are inserted into a pair of bearings formed in the mechanical chassis 5 so that the main shaft 60 is rotatably supported around the shaft. Further, the main shaft 60 constitutes a drive mechanism for supporting the feed base 59 so as to be movable in the radial direction of the magneto-optical disk and for moving and operating the same in the radial direction of the magneto-optical disk.

Specifically, the drive mechanism has a screw screw 60 and an elastic member 65 engaged with the screw screw 60.

The screw 60 is rotationally driven by a drive motor 66 attached to the mechanical chassis 5.
That is, one end of the screw screw 60 and the drive motor 66
A plurality of gear groups 67 are arranged between the rotary shafts and the screw shaft 60 while the driving force of the drive motor 66 is adjusted by the plurality of gear groups 67.

The elastic member 65 is made of an elastically displaceable material such as metal, and has its base end fixed to the supporting portion 62 of the feed base 59 by screws or the like. The elastic member 65 is engaged while the distal end portion presses the outer peripheral surface of the screw screw 60 exposed to the outside with a part of the support portion 62 cut out.

In this drive mechanism, when the screw screw 60 is rotationally driven by the drive motor 66, the elastic member 6 is engaged by the screw screw 60 and the elastic member 65.
5 moves in the axial direction of the screw screw 60. As a result, in the feed mechanism 52, the feed base 59 is fed in the radial direction of the magneto-optical disk.

The sub shaft 61 is a rotary shaft, and both ends thereof are inserted into a pair of bearing portions formed in the mechanical chassis 5 so as to be rotatably supported around the shaft. Also,
The sub shaft 61 supports the feed base 59 so as to be movable in the radial direction of the magneto-optical disk, and a head elevating mechanism 78 for moving and operating the magnetic head 56 in a direction in which it can be brought into contact with and separated from the magneto-optical disk. I am configuring.

Specifically, the head lifting mechanism 78 is shown in FIG.
As shown in FIGS. 4 and 6, a rotary shaft 61, a cam lever 80 that is slid when the rotary shaft 61 rotates, and a head lifting plate 81 that is vertically moved when the cam lever slides are provided. is doing.

The rotary shaft 61 is rotationally driven by a drive motor 68 attached to the mechanical chassis 5. That is, a plurality of gear groups 69 are arranged between one end of the rotary shaft 61 and the rotary shaft of the drive motor 68, and while the drive force of the drive motor 68 is adjusted by the plurality of gear groups 69, The rotary shaft 61 is rotationally driven. A pinion gear 79 facing one side surface of the mechanical chassis 5 is attached to the other end of the rotary shaft 61.

The cam lever 80 is made of an elongated flat plate member, and a pair of guide holes 82 are formed at both ends thereof along the longitudinal direction. On the other hand, on one side surface of the mechanical chassis 5, a pair of guide pins 83 are formed so as to project at both ends in the longitudinal direction, and the pair of guide pins 83 are engaged with the pair of guide holes 82 of the cam lever 80. There is.
As a result, the cam lever 80 is slidably supported along one side surface of the mechanical chassis 5.

Further, the cam lever 80 is provided with a rack portion 84 which meshes with the pinion gear 79 described above. Therefore, the cam lever 84 is
When 1 rotates, the rack portion 84 and the pinion gear 79 are meshed with each other to be slid.

The cam lever 80 has a cam portion 8
5 is formed to project toward the top plate portion 4a of the holder 4. The cam portion 85 has an inclined surface portion that rises along the ejection direction of the disc cartridge.

The head elevating plate 81 has a supporting plate portion 86 for supporting the above-mentioned head mounting arm 57 along the radial direction of the magneto-optical disk, and a pair of supporting piece portions for supporting the supporting plate portion 86 so as to be swingable. 87, and a cam contact piece portion 88 that comes into contact with the cam portion 85 of the cam lever 84 described above.

The support plate portion 86 is arranged along the head opening 29 of the holder 4 which is substantially orthogonal to the head mounting arm 57. Further, the support plate portion 86 is pressed toward the head opening portion 29 of the holder 4 by the elastic force of the head mounting arm 57.

The pair of support piece portions 87 are formed so as to project from both ends of the support plate portion 86 along the insertion direction of the disc cartridge, and the tips thereof are the top plate portion 4 a of the holder 4.
Is supported by. As a result, the head lift plate 81
It is swingably supported in a direction in which it can come into contact with and separate from the magneto-optical disk through the head opening 29.

The cam contact piece portion 88 is formed so as to project from the end of the support plate portion 86 on the cam lever 84 side toward the cam portion 85.

Further, the top plate portion 4a of the holder 4 is formed with an elastic displacement piece 89 for pressing the head elevating plate 81 in the direction of separating from the magneto-optical disk. The elastic displacement piece 89 is integrally formed with the top plate portion 4a by punching out the periphery thereof, and the tip end portion of the holder 4 is abutted with the support plate portion 86 of the head elevating plate 81. It is bent outward.

In the head elevating mechanism 78, when the drive motor 68 rotationally drives the rotary shaft 61 in one direction,
The cam lever 80 slides in the disc cartridge ejecting direction by the engagement between the rack portion 84 and the pinion gear 79. At this time, the cam contact piece 88 of the head lift plate 81
Moves in the insertion direction relative to the cam lever 80 while slidingly contacting the inclined surface portion of the cam portion 85. Along with this, the head elevating plate 81 swings toward the head opening 29 of the holder 4, and the magnetic head attached to the tip of the head mounting arm 57 is moved to the head opening 2.
It moves (falls) in the direction approaching the magneto-optical disk through 9. As a result, at the time of recording, the magnetic head 56 can be brought into contact with or close to the magneto-optical disk which faces the outside from the opening of the disk cartridge. In the head elevating mechanism 78, when the drive motor 68 rotationally drives the rotating shaft 61 in the other direction, the magnetic head 56 is lifted and returned to the original position by the operation reverse to the above operation. Be done.

As shown in FIG. 7, the mechanical chassis 5 is made of a resin such as plastic molded in a substantially rectangular flat plate shape. Therefore, unlike a sheet metal, it can be formed into various shapes, and reinforcement is provided by providing a rib or the like at a place where strength is required.

Further, the mechanical chassis 5 is fitted with the above-described drive motor 66 and the spindle motor 53 through the fitting holes 70 and 71 into which the above-mentioned drive motor 68 is fitted, and the above-mentioned drive motor 68 by using the reinforcing ribs. The fitting concave portion 72 to be fitted, the pair of bearing portions 73 that pivotally supports the gear group 69, and the like are integrally formed.

In this case, these parts are attached to the mechanical chassis 5
After being assembled at a predetermined position, the pressing plates 74 and 75 are attached by screwing or the like, so that they can be easily assembled.

Further, the mechanical chassis 5 is provided with a rib 76 which is a reinforcing means projectingly formed along the sub shaft (rotary shaft) 61, and a support which is in contact with the sub shaft 61 in the middle of the rib 76. And a part 77 are provided.

As a result, the auxiliary shaft 61 is provided around the opening 49.
Even if the rigidity of the mechanical chassis 5 is reduced by axially supporting both ends of the mechanical chassis 5, it is possible to reinforce the mechanical chassis 5 firmly, and the rotation of the rotary shaft 61 causes the mechanical chassis 5 to rotate. It is possible to prevent bending.

In this example, the entire mechanical chassis 5 is made of molded plastic, but a part of the mechanical chassis 5 may be made of molded plastic.

The set chassis 6 is, as shown in FIG.
The frame 90 is made of sheet metal and supports the mechanical chassis 5 and the wiring board 7, and has a pair of support arms 91 that movably support the holder 4 between the insertion / removal position and the device position.

The frame body 90 includes the side plate portions 4b of the holder 4,
4c and the bottom plate portion 4c have an overall substantially U-shape, and the battery case 9 described above is connected so as to connect both end portions.
Is attached by screwing or the like, so that it has a shape corresponding to the mechanical chassis 5 and the wiring board 7. Then, in the frame body 90, the mechanical chassis 5 and the wiring board 7 are provided.
After being attached by screwing or the like, the housing 8 is attached by screwing or the like.

The pair of support arms 91 are made of flat plate members corresponding to the both side plate portions 4b and 4c of the holder 4, and the base end portion is pivotally supported on the bottom surface side of the frame body 90 so that the lid body 3 is supported. It is swingably supported between a position in which the lid is open and a position in which the lid is closed. Further, a torsion coil spring 92 is provided between the frame body 90 and the pair of support arms 91.
Are locked, and the pair of support arms 91 are urged in a direction in which they are separated from the frame 90. Then, after the holder 4 is attached to the pair of support arms 91 by screwing or the like, the lid 3 is attached. Therefore, the holder 4 is biased by the biasing force of the above-mentioned torsion coil spring 92 in the direction of opening the lid.

The disc player 1 is shown in FIG.
As shown in FIG. 5, the device main body 2 (housing 8) has an open lock mechanism 93 for opening and closing the lid 3.

This open lock mechanism 93 has an open slider 94, which is a second engaging member, on the housing 8 side.
Open locker 9 that is the first engaging member on the lid 3 side
5 and 5.

The open slider 94 is shown in FIGS.
As shown in FIG. 5, the plate member is formed of a long flat plate member, and a pair of guide holes 97 is formed at both ends thereof along the longitudinal direction. On the other hand, a pair of guide pins 98 are formed on the inner surface of the housing 8 so as to project therefrom.
8 is engaged with a pair of guide holes 97 of the open slider 94. This allows the open slider 94
Are slidably supported along the inner surface of the housing 8 on the side where the disk cartridge is inserted and removed.

The open slider 94 has
The engaging piece 96 engaged with the open rocker 95 is the lid 3.
It is formed so as to project toward the side, and the tip portion has a shape bent to one side in the sliding direction.

One end of a tension coil spring (not shown) is hooked on one end of the open slider 94, and the other end of the tension coil spring is hooked on the inner surface of the housing 8. Therefore, the open slider 94 is biased to one side in the sliding direction by the elastic force of the tension coil spring.

Although not shown, the open lock mechanism 93 has an actuating member slidably supported on the inner surface of the casing 8 as an unlocking mechanism, and one end of the actuating member is the casing. 8 is exposed from one side surface portion to the outside, and the other end is engaged with the open rocker 95. A release button is attached to one end of the operating member, and the release button is supported by an elastic displacement piece that is cantilevered on the inner surface of the housing 8. Therefore, in the open lock mechanism 93, by pressing the release button, the operating member slides the open slider 94 to the other side in the sliding direction against the bias of the pulling coil spring.

As shown in FIGS. 1, 8 and 9, the open rocker 95 is fixed to the inner surface of the lid 3 on the side where the disk cartridge is inserted and removed (hereinafter referred to as the first surface 3a). The first fixing piece 95a and the bottom surface of the lid 3 orthogonal to the first surface 3a (hereinafter referred to as the second surface 3b).
And a second fixing piece 95b fixed to the second fixing piece 95b, which are integrally formed of a metal member having a substantially L-shaped cross section.

Of these, the first fixed piece 95a has a first
A plurality of protrusions 100 are formed on the surface that abuts the surface 3a in the longitudinal direction. On the other hand, the second fixing piece 95
In b, a plurality of hole portions 101 are formed along the longitudinal direction on the surface that comes into contact with the second surface 3b.

Further, in this open rocker 95, the notch 99 which is engaged with the engaging piece 96 of the above-mentioned open slider 94 extends from the first fixing piece 95a to the middle part of the second fixing piece 95b. The first fixed piece 95a, which is cut out, has a shape protruding toward the other side of the open slider 94 in the sliding direction.

Here, the open locker 95 is shown in FIG.
As shown in FIG. 3, when the lid 3 is made of metal such as sheet metal, the plurality of through holes 1 formed in the first surface 3 a of the lid 3
The plurality of protrusions 100 of the first fixing piece 95a are engaged with 02 and caulked, so that the lid can be firmly attached to the lid 3.

On the other hand, this open locker 95 is shown in FIG.
As shown in FIG. 1, when the lid body 3 is made of resin such as plastic, the plurality of projections of the first fixing piece 95a are provided in the plurality of through holes 102 formed in the first surface 3a of the lid body 3. Part 10
By engaging 0, positioning with respect to the lid body 3 is performed, and a plurality of screw holes 103 formed on the second surface 3b of the lid body 3 are formed on the second fixing piece 95b. It is possible to firmly attach to the lid body 3 by screwing the screws 104 respectively through the hole portions 101 of 1.

When the lid 3 is made of resin such as plastic, as shown in FIG. 12, the first fixing is performed in the plurality of through holes 102 formed in the first surface 3a of the lid 3. Piece 9
By engaging the plurality of protrusions 100 of 5a to position the open rocker 95 with respect to the lid body 3, and by bringing the second fixing piece 95b into contact with the wiring board 7 fixed to the set chassis 6 described above. , The first fixing piece 95
It is also possible to firmly attach the open rocker 95 to the lid body 3 in a state where a is pressed against the first surface 3a of the lid body 3.

Therefore, in this disc player 1, the open rocker 95 can be securely fixed to the lid body 3 regardless of the material of the lid body 3, and the manufacturing cost and the manufacturing cost can be reduced by sharing the components. It is possible to reduce service costs. Further, in the disc player 1, the plurality of through holes 102 of the lid 3 described above.
Since the plurality of protrusions 100 of the open rocker 95 are engaged with each other, it is possible to make the design common regardless of the material of the lid 3.

When fixing the open rocker 95 to the lid body 3, the first fixing piece 9 of the open rocker 95 is used.
The first surface 3 of the lid 3 is inserted into the plurality of through holes formed in the hole 5a.
It is also possible to adopt a configuration in which a plurality of protrusions formed on a are engaged.

In this open lock mechanism 93, the lid 3
To the closed state against the bias of the torsion coil spring 92 from the open state, the cutout portion 99 of the open rocker 95 fixed to the lid body 3 and the open portion slidably supported by the housing 8. The engaging piece 96 of the slider 94 comes into contact with the engaging piece 9 of the open slider 94 while sliding the open slider 94 to the other side in the sliding direction against the bias of the tension coil spring.
6 and the notch 99 of the open rocker 95 are engaged. As a result, it is possible to maintain the closed state of the lid body 3 and prevent dust and the like from entering the inside of the apparatus body 2.

On the other hand, in order to change the lid body 3 from the closed state to the opened state, the release button is pressed and the operating member moves the open slider 94 to the other side in the sliding direction against the bias of the tension coil spring. By sliding, the engagement between the engagement piece 96 of the open slider 94 and the notch 99 of the open rocker 95 is released. As a result, the lid body 3 is biased by the torsion coil spring 92 to open the lid body, and the disc cartridge can be inserted into and removed from the holder 4.

As shown in FIG. 2, the wiring board 7 includes a control unit (microcomputer) including a CPU (central processing unit), an open / close detection switch, and a disk detection switch, in addition to the jacks 11 to 16 described above. , A rotation detection switch, etc. are mounted, and the operation buttons 18, 19, 20 described above are mounted.
Drive control of each unit is performed based on operation signals from the operation switches 21 and 22 and the like.

By the way, the jacks 11 to 16 mounted along the edge of the wiring board 7 are provided in the set chassis 6 in order to maintain the prying strength when the plug is inserted from the plug insertion / removal openings 11a to 16a. The structure is held by a holding portion that is integrally formed with the frame body 90. This makes it possible to firmly hold the jacks 11 to 16 on the wiring board 7 while saving space in the housing 8.

In particular, as shown in FIG. 13, the USB jack 16 has a notch 10 on the side opposite to the plug insertion / removal port 16a.
The frame body 90 of the set chassis 6 has a cutout portion 105 of the outer casing 105.
The restriction piece portion 106 that is engaged with a is bent and formed, and has a structure capable of restricting the movement of the USB jack 16 in the insertion direction of the plug and the direction substantially orthogonal to the insertion direction.

The USB jack 16 is connected to the wiring board 7
It is attached by soldering on the top, and of the nine soldering points, four are reinforcing solders for fixing the outer casing 105 to the wiring board 7.

As described above, in the disc player 1, the restricting piece portion 106 provided on the frame 90 of the set chassis 6 is provided on the outer casing 105 formed on the side opposite to the plug insertion / removal opening 16a of the USB jack 16. The USB jack 16 is connected to the wiring board 7 by being engaged with the notch 105a.
It can be held securely on top. Further, in this disc player 1, the frame 9 of the set chassis 6
Since a restriction piece 106 in which a part of 0 is bent is inserted into a notch 105a formed in the outer casing 105 of the USB jack 16, a simple structure is adopted.
The positioning of the restriction piece 106 with respect to the notch 105a is easy, and the strength of the set chassis 6 is not impaired.
It is possible to restrict the movement of the USB jack 16 in the inserting direction of the plug and the direction substantially orthogonal to the inserting direction by the restricting piece portion 106 while saving space.

As a member for holding the USB jack 16 on the wiring board 7, the cutout portion 10 of the outer casing 105 is used.
Not only the set chassis 6 described above, but also a metal plate, a plastic,
It is also possible to use a holding member made of die casting or the like.

In the disc player constructed as described above, when loading the disc cartridge into the apparatus main body 2, first, the lid 3 is opened and the disc cartridge is inserted into the holder 4.

At this time, in the shutter opening / closing mechanism 30, when the disc cartridge is inserted into the holder 4, the lock releasing piece 31 and the lock piece are first brought into contact with each other, and the lock releasing piece 31 presses the lock piece. While
The locked state of the lock piece with respect to the shutter member is released.
Next, the tip end of the elastic displacement piece 32 is engaged with the shutter member, and the disc cartridge is further inserted into the holder 4, so that the shutter member slides and the recording / reproducing opening is opened. When the disc cartridge comes into contact with the bottom plate portion of the holder 4, the recording / reproducing opening of the disc cartridge is completely opened.

Further, in the eject mechanism 33, as shown in FIG. 3 and FIG.
First, the disc cartridge is brought into contact with the pressing piece portion 37 of the eject lever 34 by being inserted into. Next, the disk cartridge is eject lever 3
The eject lever 34 is rotated to the other side in the rotation direction against the bias of the tension coil spring 35 from the state of being in contact with the pressing piece portion 37 of No. 4. At this time, the locked piece portion 43 provided on one side of the eject lever 34 is the inclined surface portion 4 of the locking convex portion 44 provided on the top plate portion 4 a of the holder 4.
The eject lever 34 is rotated to the other side in the rotation direction while being in sliding contact with the 4a. Then, at the time when the disc cartridge is brought into contact with the bottom plate portion of the holder 4, the locked piece portion 43 of the eject lever 34 changes into the locking convex portion 44.
The locking convex portion 44 is moved to the locking surface portion 44b of FIG.

As a result, the rotation of the eject lever 34 urged by the tension coil spring 35 toward one side is locked and the disc cartridge is held by the holder 4.

Next, the lid body 3 is closed to allow the disc cartridge and the holder 4 to be attached to the main body 2 of the apparatus.
Is moved from the insertion / removal position to the mounting position. At this time, the magneto-optical disk is mounted on the disk table 54 with the disk cartridge positioned on the mechanical chassis 5 by the positioning pins 48. As described above, the disk cartridge can be loaded in the apparatus main body 2.

In this disc player 1, the device body 2
When the disc table 54 is rotationally driven by the spindle motor 53 to rotate the magneto-optical disc in the state where the disc cartridge is loaded in the disk cartridge, the feeding mechanism 52 feeds the optical pickup 55 in the radial direction of the magneto-optical disc during reproduction. While being operated, the optical pickup 55 irradiates the magneto-optical disk facing the outside from the opening with laser light to reproduce an information signal.

On the other hand, at the time of recording, the head elevating mechanism 78 brings the magnetic head 56 into contact with or in proximity to the magneto-optical disk facing outward from the opening. Then, while the optical pickup 55 and the magnetic head 56, which are arranged to face each other via the magneto-optical disk, are moved by the feeding mechanism 52 in the radial direction of the magneto-optical disk, the optical pickup 55 is exposed to the outside through the opening. The magnetic head 5 is irradiated with laser light on one main surface of the disk.
Information signals are recorded by applying an external magnetic field to the other main surface of the magneto-optical disk 6 which is exposed to the outside from the opening.

On the other hand, the disk cartridge is installed in the main body 2 of the apparatus.
When taking out from the lid, the lid 3 is changed from the closed state to the open state.

At this time, in the eject mechanism 33, as shown in FIGS. 3, 4 and 5, the lid 3 is opened to move the disk cartridge together with the holder 4 from the mounting position to the insertion / removal position. Be moved. The unlocking piece 4 provided on the other side of the eject lever 34
The tip of 6 is brought into contact with the tip of the ratchet plate 47,
The holder 4 is pressed in a direction approaching the holder 4. At this time, one of the eject levers 34 is pushed up in the direction away from the holder 4 with the fulcrum convex portion 39 as a fulcrum. As a result, the locked state of the locked piece 43 of the eject lever 34 with respect to the locking projection 44 of the holder 4 is released. Then, the eject lever 34 is urged by the tension coil spring 35 and rotated to one side in the rotation direction, and the pressing piece portion 37 presses the disk cartridge while ejecting the disk cartridge 1 to the outside of the holder 4. To do.

Here, the eject lever 34 is formed such that the locked piece portion 43 provided on one side of the fulcrum convex portion 39 is longer than the lock release piece portion 46 provided on the other side. .

In this case, even if the amount of movement of the unlocking piece 46 in the direction approaching the holder 4 is small, the locked piece 43 is held by the fulcrum convex portion 39 as a fulcrum.
Can be pushed up in a direction away from,
The eject lever 3 with respect to the locking convex portion 44 of the holder 4
It is possible to reliably release the locked state of the locked piece portion 43 of No. 4.

On the other hand, the eject lever 34 may be formed such that the lock releasing piece portion 46 provided on the other side of the fulcrum convex portion 39 is longer than the locked piece portion 43 provided on the one side. .

In this case, when the locked piece portion 43 is pushed up in the direction of separating from the holder 4, the lock releasing piece portion 46 is made smaller in the direction of approaching the holder 4 with the fulcrum convex portion 39 as a fulcrum. It suffices to press with force, and the tip of the lock releasing piece 46 and the ratchet plate 47 that come into contact with each other are pressed.
It is possible to prevent a load from being generated on the tip portion of the.

In the shutter opening / closing mechanism 30, the disk cartridge is ejected from the holder 4, so that the shutter member slides in the direction of closing the recording / reproducing opening, and the tip of the elastic displacement piece 32 is moved. And the shutter member is disengaged. Next, the disc cartridge is further ejected from the holder 4, so that the recording / reproducing opening of the disc cartridge is completely closed. Then, when the unlocking piece 31 separates from the locking piece, the locking piece locks the slide of the shutter member again. As described above, the disc cartridge can be taken out from the apparatus main body 2.

As described above, in the disc player 1, the eject mechanism 78 described above is mounted on the holder 4, and the disc cartridge is mounted on the outside of the main body 2 of the device without imposing a load on the mechanical chassis 5. It is possible to discharge it properly.

Further, in the disc player 1, the structure of the mechanical chassis 5 can be simplified, and the load on the mechanical chassis 5 is reduced, so that the range of selection of materials is widened and the mechanical chassis 5 is made wider. It is also possible to configure the with a lightweight molded plastic or the like.

As described above, in the disc player 1, since the mechanical chassis 5 is molded by plastic or the like, it is possible to make the mechanical chassis significantly lighter than the case where the mechanical chassis is made of sheet metal. It is possible to drastically reduce the parts and the like for mounting the motors, gears, etc. that compose each mechanism described above. In particular, in an electronic device such as a portable disc player in which it is desired to reduce the size and weight of the entire device, it is possible to significantly reduce the manufacturing cost by reducing the number of parts and simplifying the assembly process.

The present invention is not limited to the disc player 1 described above, and it is possible to record and / or reproduce information signals such as music signals, video signals and programs on the disc-shaped recording medium. It is also applicable to various recording and / or reproducing devices. The disc-shaped recording medium is a read-only optical disc in which information signals such as audio signals, image signals, and programs are recorded in advance, and a write-once optical disc in which these information signals can be written only once. There may be mentioned a rewritable type optical disc, a magnetic disc, etc. capable of repeatedly rewriting the above information, and these disc-shaped recording media may be rotatably housed inside a disc cartridge.

[0115]

As described above in detail, according to the present invention, since the ejecting means is provided in the holder, the structure is simplified and the disk cartridge is mounted on the main body without giving a load to the chassis. Can be appropriately discharged to the outside. Further, according to the present invention, the size and weight of the entire apparatus can be reduced, the number of parts can be reduced, and the number of assembling steps can be simplified, whereby the manufacturing cost can be significantly reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which a disc player to which the present invention is applied is placed on a charging stand.

FIG. 2 is an exploded perspective view showing a configuration of the disc player.

FIG. 3 is a plan view of the apparatus body as viewed from the holder side,
FIG. 6 is a diagram for explaining a state where the disc cartridge is ejected from the holder.

FIG. 4 is a plan view of the apparatus body as viewed from the holder side,
It is a figure for explaining the state where the disc cartridge was inserted in the holder.

FIG. 5 is a side view of the main part of the apparatus main body viewed from the eject mechanism side, and is a diagram for explaining the unlocking operation of the eject mechanism.

FIG. 6 is a perspective view of a state in which each mechanism is attached to the mechanical chassis as seen from the side opposite to the surface on which the disk cartridge is attached.

FIG. 7 is a perspective view of the mechanical chassis as viewed from the side opposite to the surface on which the disk cartridge is mounted.

FIG. 8 is a schematic diagram for explaining an open lock mechanism.

FIG. 9 is a perspective view showing an open locker.

FIG. 10 is a cross-sectional view of essential parts showing a state in which an open rocker is attached to a lid body made of metal.

FIG. 11 is a cross-sectional view of essential parts showing a state in which an open rocker is attached to a lid body made of plastic.

FIG. 12 is a main-portion cross-sectional view showing another state in which the open locker is attached to the lid body made of plastic.

FIG. 13 is a perspective view of relevant parts showing a state in which the USB jack is held by the set chassis.

[Explanation of symbols]

1 disc player, 2 device body, 3 lid, 3a
1st surface, 3b 2nd surface, 4 holder, 5 mechanical chassis, 6 set chassis, 7 wiring near plate, 8 housing, 16 USB jack, 16a plug insertion / extraction opening, 3
0 shutter open / close mechanism, 33 eject mechanism, 34
Eject lever, 35 tension coil spring, 36 support shaft, 37 pressing piece part, 39 fulcrum convex part, 42 lever lock mechanism, 43 locked piece part, 44 locking convex part, 44a
Inclined surface portion, 44b locking surface portion, lever lock release mechanism, 46 lock release piece portion, 47 ratchet plate, 50
Disk rotation drive mechanism, 51 Recording / reproducing mechanism, 52
Feed mechanism, 53 spindle motor, 54 disk table, 55 optical pickup, 56 magnetic head, 5
7 head mounting arm, 59 feed base, 60 main shaft (screw screw), 61 sub shaft (rotating shaft), 76 rib, 77 support portion, 78 head lifting mechanism, 90 frame body, 91 pair of support arms, 92 torsion coil spring,
93 open lock mechanism, 94 open slider, 95 open rocker, 95a first fixing piece,
95b 2nd fixing piece, 100 protrusion part, 101 hole part, 102 through hole, 103 screw hole part, 104 screw, 105 outer casing, 105a notch part, 106 restricting piece part

Claims (6)

[Claims] 1. A recording and / or reproducing apparatus for recording and / or reproducing a signal to and from a disk-shaped recording medium rotatably housed in a disk cartridge, comprising: a main body part; An openable and closable lid, an insertion / removal position where the disc cartridge of the main body is inserted and removed when the lid is opened, and a lid when the lid is closed A holder for holding the disc cartridge between a mounting position of the main body portion where the disc-shaped recording medium is mounted; and a holder provided in the holder, which is provided in the holder when the lid body is in an open state. Ejecting means for ejecting the held disc cartridge to the outside of the main body portion, the ejecting means is provided at one end with a pressing force for contacting the disc cartridge. And a fulcrum part that is in contact with the holder at the other end,
An eject lever rotatably supported by the holder between one end and the other end, and the eject lever to one side in the rotating direction so that the pressing portion presses in the direction of ejecting the disc cartridge. And a biasing means for tilting the eject lever in a direction in which one of them is close to the holder and the other is spaced from the holder while using the fulcrum as a fulcrum. A stopper portion and a locked portion provided on one of the eject levers, and the disc cartridge is inserted into the main body portion so that the disc cartridge is brought into contact with the pressing portion, and the eject lever is attached to the attachment portion. When the locking means rotates to the other side in the rotation direction against the bias of the biasing means to lock the locked portion to the locking portion, and the lid body is in the open state. , The other of the eject levers is pressed in a direction approaching the holder, and the one of the eject levers is pushed up in a direction separating from the holder by using the fulcrum part as a fulcrum, thereby the A recording and / or reproducing apparatus, comprising: a lock releasing means for releasing the locked state of the locked portion. 2. The recording and / or reproducing apparatus according to claim 1, wherein the eject lever is formed such that one of the eject levers is longer than the other of the fulcrums. 3. The recording and / or reproducing apparatus according to claim 1, wherein the eject lever is formed so that the one side is shorter than the other side with respect to the fulcrum portion. 4. The locking portion projects from the holder toward the eject lever, and has an inclined surface portion that rises toward the other side in the rotating direction of the eject lever and an end of the inclined surface portion on the other side. 2. A locking surface portion on which the locked portion is locked.
The described recording and / or reproducing apparatus. 5. The main body section records and / or reproduces a signal on and from a rotation driving unit that rotationally drives the disc-shaped recording medium, and the disc-shaped recording medium that is rotationally driven by the rotation driving unit. It has a recording / reproducing means, a feeding operation means for feeding the recording / reproducing means in a radial direction of the disk-shaped recording medium, and a chassis made of plastic and supporting at least the rotation driving means and the feeding operation means. The recording and / or reproducing apparatus according to claim 1, wherein 6. The recording / reproducing means is an optical pickup for irradiating a main surface of the disc-shaped recording medium with a laser beam at the time of recording or reproducing, and is arranged to face the optical pickup, and the disc is used for recording. 6. A recording and / or reproducing apparatus according to claim 5, further comprising a magnetic head for applying an external magnetic field to the other main surface of the linear recording medium.