JP3366446B2 - Disk recording and playback device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk recording / reproducing apparatus for recording / reproducing a disk as a recording medium,
In particular, a disc stored in a cartridge, such as an MD (Min
The present invention relates to a disc recording / reproducing apparatus for recording / reproducing information on / from an i Disc), MO (Magnet Optical) disc, or the like.

[0002]

2. Description of the Related Art Conventionally, for example, a compact disc (hereinafter referred to as a CD) has been used as a recording medium of a disc recording / reproducing apparatus. However, since the recording surface (hereinafter referred to as the disk surface) of the CD is exposed, scratches, dust, or the like may occur when the CD is attached to or detached from the disk recording / reproducing device. Therefore, in recent years, in consideration of disk surface protection, portability, etc., it has been housed in a cartridge and downsized,
For example, recording media such as MD and MO have been developed.

As a method of attaching / detaching the disc housed in the cartridge to / from the disc recording / reproducing apparatus, there is, for example, a top insertion system.

As shown in FIGS. 6 and 7 which are explanatory views of the present invention, the top insertion system is a case which is composed of a cabinet 11 and a lid 12, and in which a cartridge 41 is attached and detached. Is opened from the upper side of the housing.

That is, as shown in FIG. 6, the guide storage of the cartridge 41 is performed along the guide portions 1a and 1b of the cartridge holder 1 which opens the cartridge 41 as the lid 12 rotates in the direction of the arrow H. It is performed by moving the arrow L ₁ direction Te. Further, the ejection of the cartridge 41 is performed by moving the cartridge 41 in the direction of the arrow L _{2 in the} state shown in FIG. Then, as shown in FIG. 7, the recording / reproduction is performed in a state in which the lid 12 is rotated in the direction of the arrow G to close the lid 12.

As shown in FIG. 33, a conventional disc recording / reproducing apparatus includes a cartridge holder 101 for guiding and holding a cartridge 41 and a cartridge holder 1
01 as a holder for supporting the rotation 105
The chassis 102 is provided as a base body that rotatably supports 106 as a fulcrum.

As shown in FIGS. 33 and 34, the cartridge holder 101 has a lift lever 110 for lifting the magnetic head 107 and a lift connecting lever 109.
And each support part and a guide shaft are arranged. A spindle motor 111, a pickup (not shown), a head support angle 112 that is fixedly connected to the pickup and supports the magnetic head 107, and a moving unit (not shown) that moves the pickup and the head support angle 112 are attached to the chassis 102. The lift connecting lever 10
9, a lift connection operation lever 108, which is connected to 9 and operates.
Actuating means (not shown) for actuating the lift coupling operation lever 108, a disc type, an erroneous erasure prevention switch 114 for detecting erroneous erasure prevention, and a positioning pin for locating the cartridge 41 during recording and reproduction. 10
2a, the contact portion 102c, other supporting portions, guide shafts, substrates, connection terminals (not shown), and the like are provided.

The operating mechanism of the lift lever 110 will be described below with reference to FIGS. 35 and 36.

The chassis 102 is shown in FIG.
As shown in (b), the lift connecting operation lever 108 is guided by a guide shaft (not shown) so as to be movable in the directions of arrows L ₁ and L ₂ . In addition, the cartridge holder 10
1, a lift connecting lever 109 is provided on the cartridge holder 101, guide shafts 101b, 101c,
It is guided by 101d so as to be movable in the directions of arrows L ₁ and L ₂ . The lift connecting lever 109 is connected to the connecting portion 1 at the connecting hole 108a of the lift connecting operation lever 108.
09b is connected and interlocks with the lift connecting operation lever 108.

Further, the lift lever 110 includes a support portion 101a provided on the cartridge holder 101.
101f (FIG. 33) and the support portion 11 of the lift lever 110
0a and 110b are rotatably supported by a shaft (not shown) so that the cartridge holder 101 is moved in the directions of arrows H and G.
It is rotatably supported above. The lift lever 110 is biased in the direction of arrow G by a biasing spring (not shown).

Further, the abutment portion 109a provided at the end of the lift connecting lever 109 is provided at the end of the lift connecting lever 109 on the side of the lift connecting lever 109 when the lift connecting lever 109 moves in the direction of the arrow L ₁ . An abutting portion 110e is provided that abuts while being pushed up from below. That is, the lift lever 110 is the lift connecting lever 1
With the movement of 09 in the direction of arrow L ₁ , it is rotated in the direction of arrow H against the biasing force.

Further, the lift lever 110 slides in contact with the contact member 113a of the head arm 113, and the magnetic head 107 is rotated in the direction of arrow H with the support portion 113c provided on the head arm 113 as a fulcrum. Protrusion 110c
Is provided.

In this state, as shown in FIG. 35 (c), the magnetic head 107 is removed from the cartridge 41.

The cartridge holder 101 comprises holder supporting angles 105, 10 provided on the chassis 102.
6 (Fig. 33) as a fulcrum when attaching and detaching the cartridge
It can be rotated in any direction.

Next, the operation of shifting from the above state to the recordable state will be described with reference to FIG.

When the lift connecting operation lever 108 is moved in the direction of arrow L ₁ by moving means (not shown),
As shown in (a) and (b), the lift connecting lever 109 connected through the connecting hole 108a also moves in the direction of arrow L ₁ ,
Accordingly, the contact portion 110 of the lift lever 110 is
e and the contact portion 109a of the lift connecting lever 109 are separated from each other. As a result, the lift lever 110 moves to the support portion 11
It rotates in the direction of arrow G about 0a and 110b.

At this time, the protrusion 11 of the lift lever 110
0c and the contact member 113a of the head arm 113 are also released, and the head arm 113 rotates in the direction of arrow G with the supporting portion 113c of the head arm 113 as a fulcrum, as shown in FIG. 36 (c). The magnetic head 107 assembled to the head arm 113 is also supported by the rotation in a recordable state.

Further, the cartridge holder 101 has a bent portion 101e formed on the side surface. When the cartridge 41 is in a recordable state, the lift connecting operation lever 1
08 moves in the direction of the arrow L ₁ and the protrusion 108b is caught by the contact portion 101e of the cartridge holder 101, whereby the cartridge holder 1 from the recordable state
The rotation movement of 01 is blocked.

Next, the maximum height of the apparatus when the magnetic head 107 avoids the cartridge 41 will be described with reference to FIG.

The magnetic head 107 has a head arm 113.
Suspension spring 107c, which is incorporated in a support arm 107b attached to and is urged to rotate in the direction of arrow G
And attached to this suspension spring 107c,
It is composed of a magnetic head slider portion 107a that slides on the disk surface during recording.

The magnetic head slider portion 107a attached to the suspension spring 107c is maintained in the illustrated state by the suspension spring 107c contacting one end of the support arm 107b.

However, in actuality, the magnetic head slider portion 107a is subject to a suspension spring 107 when the magnetic head 107 slides on the disk due to an impulse or a shock.
The deflection of c causes the suspension spring 107c to be in a state as shown by the alternate long and short dash line, that is, the curved portion 107c 'of the suspension spring 107c is in the state of being close to the inner surface of the lid 12.

Therefore, the distance from the upper surface of the chassis 102 to the magnetic head 107 (hereinafter referred to as the set height).
Is increased by the amount of deflection α of the suspension spring 107c, and the magnetic head 107 and the lid 12 must be provided at a distance of at least α. In addition, the set height at this time is a height obtained by adding α to the normal set height h, and thus is set to the maximum set height h _max . Therefore, the height of the entire disc recording / reproducing apparatus is determined by setting the maximum set height h _max .

Further, the cartridge 41 can be ejected from the state shown in FIG. 7 to the state shown in FIG.

At this time, if the disk recording / reproducing apparatus is in the state shown in FIG. 36, the lift coupling operation lever 108 is moved by an unillustrated moving means (in this case, a motor block including a speed reducing mechanism) as indicated by an arrow L _2. The lock of the contact portion 101e of the cartridge holder 101, and the protrusion 110c of the lift lever 110.
Prevents the magnetic head 107 from rotating in the direction of the arrow H, and after the state shown in FIG.
By rotating the cartridge holder 101 in the direction of arrow H with the holder supporting angle 106 (105) of No. 1 as a fulcrum, the ejection operation of the cartridge 41 of the disk recording / reproducing apparatus becomes possible.

Further, the distance between the magnetic head 107 and the cartridge holder 101 (hereinafter referred to as clearance) will be described below with reference to FIGS. 40 and 41.

As shown in FIG. 41, the axis parallel to the cartridge holder 101 and passing through the rotation fulcrum of the holder support angle 105 of the cartridge holder 101 is X,
When the axis orthogonal to this is set to Y, the support arm 107b in the reproducing state causes the contact head 113a formed on the lower surface of the head arm 113 to contact the protrusion 110c of the lift lever 110, whereby the magnetic head 107b. Is the clearance I _{2 with} respect to the cartridge holder 101.
To keep. At this time, the head arm 113
Abutting member 113a and the protrusion 11 of the lift lever 110
The angle between the contact portion P with 0c and the axis X is θ ₁ °.

Further, since the cartridge holder 101 for discharging the cartridge 41, as shown in FIG. 40, it is assumed that theta ₃ ° rotated in the arrow H direction. At this time, in the lift lever 110, since the holder support angle 105 is provided on the cartridge holder 101, the contact portion P between the contact member 113a of the head arm 113 and the protrusion 110c of the lift lever 110 is the contact portion. Move to P '.
However, since the lift lever 110 rotates integrally with the cartridge holder 101, the angle θ ₂ ° formed by the contact portion P ′ and the reference axis X ′ after rotation becomes the same as θ ₁ °. That is, θ ₂ ° = θ ₁ °.

As described above, in the case where the rotation support portion 132c of the support arm 107b is not on the same fulcrum as the holder support angle 105 of the cartridge holder 101, FIG.
As shown in 2, the position Q of the magnetic head slider portion 107a when the cartridge holder 101 is in the playback position, the cartridge holder 101 in the direction of arrow H theta ₃
° When rotated, it moves to position Q ', and line segment 132c · Q: line segment 132c · P <line segment 132c ·
Q ′: Since the line segment 132c · P ′ is established, the position Q ′ of the magnetic head slider portion 107a when the cartridge holder 101 rotates in the direction of the arrow H by θ ₃ ° is higher than the target position Q. . Therefore, even if the angle formed by the contact portion P and the axis X is θ ₁ ° and the angle formed by the contact portion P ′ and the reference axis X ′ after rotation is the same θ ₂ °, as shown in FIG. The clearance I ₂ of the disc recording / reproducing apparatus in the detachable state is larger than the target clearance I ₁ .

Therefore, as shown in FIG. 40, the lid 1
The inner surface of 2 and the magnetic head slider portion 107a of the magnetic head 107 are in close proximity to each other.

[0031]

By the way, in the conventional disk recording / reproducing apparatus, as shown in FIGS. 37 and 38, the display substrate 200 is arranged above the cartridge holder 101 so as to avoid the magnetic head moving range. It is common to do.

For example, on one surface of the display substrate 200, the operation SWs 202 ..., Display section 203, etc. necessary for the operation of the set are arranged, and on the other side, the circuit parts 201 etc. are arranged.

In this way, the cartridge holder 101
When the connecting member such as the lift connecting lever 109 is arranged on the upper surface, there is a restriction on the arrangement of the circuit parts 201 and the like within the range where the connecting member moves. As for the movement stroke of the connecting member, a loss occurs because the connecting movement moves from the lift connecting operation lever 108 to the lift connecting lever 109 and further to the lift lever 110. Therefore, a long stroke is required for the moving stroke in order to move by adding this loss in advance. still,
The display substrate 200 and the like are often installed on the lid 12.

In the disk recording / reproducing apparatus as described above, the lift lever is moved by the driving force transmission mechanism connected from the lift connecting operation lever 108 arranged on the chassis 102 to the lift connecting lever 109 arranged on the holder 101. A driving force for rotating the 110 is transmitted. For this reason, the number of related parts necessary for the lift lever 110 to perform the rotational movement is increased, and there is a considerable disadvantage in terms of the accuracy of the lift operation and the cost. Further, since the moving member is arranged in a wide range on the upper surface of the cartridge holder 101, the circuit component space arranged on the display substrate 200 or the like is considerably affected.

Further, according to the conventional disc recording / reproducing apparatus, the lift coupling operation lever 108 is locked so that the cartridge holder 101 does not rotate while recording on the disc (state in which the magnetic head is lowered). However, this locking may be released without the movement of the lift coupling operation lever 108 due to an external force such as a drop or vibration. In particular, in a device characterized by miniaturization as in this conventional example, since the device is used on the palm or while being moved, the unlocking can sufficiently occur.

At this time, when the cartridge 41 moves in the direction of the arrow L ₁ as shown in FIGS. 44A and 44B, the magnetic head slider portion 107a comes into contact with the magnetic head window 41c of the cartridge 41, and the magnetic head 107 It is also possible to damage the.

Further, since such a disk recording / reproducing apparatus can be used as an information recording terminal, it is necessary to devise a cartridge which can be taken out in an emergency even during recording.

However, since the conventional disk recording / reproducing apparatus is moved by the moving means such as a motor, when power is not supplied in an emergency or the like, when the cartridge holder 101 is forcibly rotated to take out the cartridge 41, Therefore, the magnetic head 107 is damaged. Further, the magnetic head 107 may prevent the ejection of the cartridge 41.

Further, according to the conventional example, it is considered that the magnetic head 107 is rotated by an abnormal operation of a circuit or the like even from the state shown in FIG. 33 and the cartridge 41 is inserted, thereby damaging the magnetic head 107. To be

Further, when the cartridge holder 101 makes a rotational movement during reproduction and the cartridge 41 is in the removable state, the holder support angle 105 of the cartridge holder 101 and the rotational support portion 132c of the support arm 107b are arranged. Due to the difference in the clearance of the magnetic head 107 with respect to the cartridge 41 caused by the difference in the installation position, a part of the support arm 107b may contact the inner surface of the lid 12. Therefore, in the cabinet 11 that houses the disk recording / reproducing apparatus, the magnetic head 1
It is necessary to provide a sufficient space on the upper surface side of 07, which causes a problem of hindering downsizing (thinning) of the device.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a disc recording / reproducing apparatus capable of downsizing the apparatus, reducing the cost, and improving the operability. It is in.

[0042]

A disc recording / reproducing apparatus according to a first aspect of the present invention comprises a disc housed in a cartridge,
In a disk recording / reproducing apparatus for irradiating a laser beam by a pickup and generating a magnetic field by a magnetic head according to a recording signal to record information, a base having the pickup and the cartridge are held, A holder that reciprocally rotates with respect to the base between an attachable / detachable position and a recording / reproducing position, integrally moves with the pickup, and supports the magnetic head rotatably between a recording position and a reproducing position. Head rotation supporting means is provided, and the holder is provided with head rotation connecting means for rotating the head rotation supporting means by its own rotation and drive means for rotating the head rotation supporting means. is, the drive means is characterized in that it is directly connected to the head pivotably connecting means.

According to a second aspect of the present invention, there is provided a disk recording / reproducing apparatus for recording information by irradiating a disk housed in a cartridge with laser light by a pickup and generating a magnetic field by a magnetic head according to a recording signal. In a disk recording / reproducing apparatus for performing the above, a base having the pickup, a holder that holds the cartridge, and a holder that reciprocally rotates with respect to the base at a removable position of the cartridge and a recordable / reproducible position, and the pickup. The head rotation support means is provided which moves integrally and which rotatably supports the magnetic head between a recording position and a reproduction position. The head rotation support means is rotated by the holder to rotate the head rotation support means. A head rotation connecting means for moving and a holder moving means for rotating the head rotation connecting means in accordance with the rotation of the holder. It is characterized by being kicked.

According to a third aspect of the present invention, there is provided the disc recording / reproducing apparatus according to the second aspect, wherein the holder moving means interlocks with the rotation of the holder when the holder is at the recordable / reproducible position on the base. When the holder rotates from the recordable / reproducible position to the detachable position, the holder moving means rotates integrally with the holder. Therefore, the holder moving guide means including the second guide portion for guiding the holder moving means is provided.

According to a fourth aspect of the present invention, there is provided a disk recording / reproducing apparatus for recording information by irradiating a disk housed in a cartridge with laser light by a pickup and generating a magnetic field by a magnetic head according to a recording signal. In a disk recording / reproducing apparatus for performing the above, a base having the pickup, a holder that holds the cartridge, and a holder that reciprocally rotates with respect to the base at a removable position of the cartridge and a recordable / reproducible position, and the pickup. Head rotation support means that moves integrally and that rotatably supports the magnetic head between a recording position and a reproduction position and rotation that is provided in the holder and that is different from the rotation center of the head rotation support means. A head rotation connection having a center and contacting the head rotation support means by its own rotation to rotate the head rotation support means. A magnetic head and a cartridge when the holder is rotated from the recordable / reproducible position to the attachable / detachable position of the cartridge on at least one side of the contact portion between the head rotation support means and the head rotation connecting means. It is characterized in that a proper gap holding means for properly holding the gap between and is provided.

Further, in the disk recording / reproducing apparatus according to claim 5, in the disk recording / reproducing apparatus according to claim 1, 2, 3 or 4, while the holder is rotated from the recording / reproducing position to the cartridge removable position. The cartridge is characterized in that it is provided with a separation regulation member that regulates the cartridge so as not to be separated from the holder.

[0047]

According to the structure of claim 1, since the drive means is directly connected to the head rotation connecting means, the output of, for example, a motor as the drive means can be directly transmitted to the head rotation supporting means. it can. As a result, when the magnetic head is in the standby state at the reproducing position, it is possible to arrange the motor in the space required to avoid the contact between the magnetic head and the housing of the device due to the swing of the magnetic head. Therefore, it is not necessary to provide a motor on the back side of the device as in the conventional case, and a complicated driving force transmission mechanism for transmitting the driving force from the motor arranged on the back side can be eliminated. Therefore, the constituent members of the device can be simplified and the device can be made thin, so that the cost and size of the device can be reduced.

According to the second aspect of the invention, by providing the holder moving means for rotating the head rotation connecting means in accordance with the rotation of the holder, the head can be moved without depending on the driving force of the motor. The rotation connecting means can be rotated. As a result, the magnetic head can be rotated to the retracted position in conjunction with the rotation of the holder, so that the cartridge can be removed from the holder without constantly hitting the magnetic head. Therefore, it is possible to prevent damage to the magnetic head and prevent obstruction of cartridge withdrawal, thereby improving the operability of the apparatus.

According to the third aspect of the invention, when the holder is in the recording / reproducing position, the holder moving means is guided so that the holder moving means rotates in association with the rotation of the holder. When the first guide portion and the holder rotate from the recordable / reproducible position to the attachable / detachable position,
Since the holder moving means is provided with the holder moving guide means including the second guide portion for guiding the holder moving means so as to rotate integrally with the holder,
The timing of rotation of the holder moving means can be adjusted by the rotation angle of the holder. As a result, the magnetic head can be rotated in conjunction with the rotation of the holder, so that the cartridge can be always attached and detached while the magnetic head is retracted. Therefore, the cartridge can be pulled out without damaging the magnetic head, and the operability of the apparatus can be improved.

According to the fourth aspect of the invention, the rotation fulcrum of the holder is provided by the proper gap holding means provided on at least one side of the contact portion between the head rotation support means and the head rotation connection means. The difference between the retracting intervals of the magnetic head caused by the difference between the position of the head rotation support means and the rotation fulcrum, that is, the gap between the magnetic head and the cartridge when the holder is at the cartridge removable position, and the recording by the holder It is possible to reduce the difference between the gap between the magnetic head and the cartridge when the magnetic head is in the reproducible position and the magnetic head is in the reproducing position. As a result, the gap between the magnetic head and the cartridge can be kept small when the holder is at the cartridge attachable / detachable position, so that the device can be made thinner, and as a result, the device can be made smaller. be able to.

Further, according to the fifth aspect of the invention, the cartridge is not separated from the holder while the holder is rotated from the recordable / reproducible position to the cartridge attachable / detachable position by the separation restricting member. The cartridge can be taken out with the magnetic head completely retracted from the cartridge. As a result, damage to the magnetic head due to attachment / detachment of the cartridge can be eliminated.

[0052]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIGS.
The explanation is based on the following. The disc recording / reproducing apparatus of this embodiment can use two types of optical discs as recording media.

First, the above optical disk will be described. As the above-mentioned optical disc, for example, an MD (Mini Disc) for recording / reproducing information or reproducing only is used, and as shown in FIGS. 8 and 9, the optical disc has substantially rectangular parallelepiped plate-shaped cartridges 41 and 45. And the cartridge 41
.. and the disk bodies 42 and 46 housed in 45.

As shown in FIGS. 8 (b) and 8 (d), the cartridge 41 containing the optical disc for recording / reproducing information has a pickup window 41a and a magnetic head window 41c.
And have been drilled. As a result, in the recording / reproducing cartridge 41, at the time of reproduction, the pickup irradiates the disc main body 42 with light from the pickup window 41a to read the recorded information, and at the time of recording, from the magnetic head window 41c to the magnetic head. Is inserted to change the polarity of the disc body 42, and light is emitted from the pickup window 41a by the pickup to record information.

The pickup window 41a and the magnetic head window 41c formed in the cartridge 41 are also provided.
Is covered with a shutter 43 which is slidable in the directions of arrows K ₁ and K ₂ . The shutter 43 slides in the direction of arrow K ₁ in the disc recording / reproducing apparatus to open the pickup window 41a and the magnetic head window 41c of the cartridge 41, and the pickup window 41a and the magnetic head window 41c. The disc body 42 is exposed from the.

That is, when the cartridge 41 is not inserted into the disc recording / reproducing apparatus, the shutter 43 is used.
Is engaged with the tip end portion 44a of the shutter lock lever 44 provided on the cartridge 41 and the engagement portion 43c provided on one end side of the shutter 43, so that the pickup window 41a and the magnetic head window 41c of the cartridge 41 are provided. Is locked in the closed position where the is closed. That is, when the cartridge 41 is ejected, the shutter spring 3 described later is used.
9 is inserted into the insertion hole 43a of the shutter 43, the shutter 43 is moved in the direction of the arrow K ₂ , and the pickup window 4 is moved.
1a and the window 41c for the magnetic head are closed.

On the other hand, when the cartridge 41 is inserted into the disc recording / reproducing apparatus, the shutter 43 is
The engagement of the locking portion 43c is released, and it is released by the shutter opening / closing mechanism provided in the cartridge holder 1 described later.

As shown in FIGS. 8A and 8C, the groove portion 41 is provided at the sliding position of the shutter 43 of the cartridge 41.
b is formed, and a constituent member of a shutter opening / closing mechanism described later is inserted into the groove portion 41b, so that the constituent member presses the shutter lock lever 44 to release the locked state of the shutter 43 and open the shutter 43. It has become.

The disk body 42 for recording and reproducing as described above
For this, a magneto-optical disk is used. Therefore,
At the time of recording, the disc main body 42 is irradiated with laser light from the pickup window 41a side by a pickup to reduce the coercive force of the magnetic surface of the disc main body 42, and further, from the magnetic head window 41c side by the magnetic head.
The polarity of the area of the disk body 42 heated by the laser light is changed according to the recorded information. After that, when the polarity changing area of the disk body 42 is deviated from the laser beam, the temperature of the area is lowered, the polarity is maintained, and information is recorded. That is, information is recorded on the disk body 42 by the magnetic field modulation overwrite method.

During reproduction, the disc body 4
2 is irradiated with laser light from the pickup window 41a side,
The information in which the polarization angle of the reflected light from the disk surface is changed by the recorded polarity (Kerr effect, Faraday effect) is converted into a digital signal and read as information recorded in the disk body 42.

Further, as shown in FIGS. 9 (a), (b), (c) and (d), the cartridge 45 accommodating a reproduction-only optical disc accommodates a disc main body 46 as a recording medium, and FIG. ), The pickup window 45a
Has been drilled. Thus, during reproduction, the pickup irradiates the disc body 46 with light from the pickup window 45a to read the recorded information.

Similar to the cartridge 41 shown in FIG. 8, the pickup window 45a is covered with a shutter 47 which is slidable in the directions of arrows K ₁ and K ₂ . The shutter 47 slides in the direction of arrow K ₁ in the disk recording / reproducing apparatus, whereby the pickup window 4 of the cartridge 45 is moved.
5a is opened so that the disc body 46 is exposed through the pickup window 45a.

That is, when the cartridge 45 is not inserted into the disc recording / reproducing apparatus, the shutter 47 is used.
Is locked at the closed position where the tip end portion 48a of the shutter lock lever 48 and the locking portion 47c provided on one end side of the shutter 47 are engaged with each other and the pickup window 45a of the cartridge 45 is closed. That is, when the cartridge 45 is ejected, the shutter spring 39 described later is used.
Is inserted into the insertion hole 47a of the shutter 47, and the shutter 4
7 is moved in the direction of the arrow K ₂ and the pickup window 41
It is designed to block a.

On the other hand, when the cartridge 45 is inserted into the disc recording / reproducing apparatus, the shutter 47 is
The engagement of the locking portion 47c is released, and it is released by the shutter opening / closing mechanism provided in the cartridge holder 1 described later.

As shown in FIGS. 9A and 9C, the groove 45 is formed at the sliding position of the shutter 47 of the cartridge 45.
b is formed, and a constituent member of a shutter opening / closing mechanism, which will be described later, is inserted into the groove portion 45b so that the constituent member presses the shutter lock lever 48 to release the locked state of the shutter 47 and open the shutter 47. It has become.

Thus, the reproduction-only disc body 46
In addition to the magneto-optical disc similar to the disc body 42, a disc such as a generally known CD (Compact Disc) that reads information by the presence or absence of reflected light is used.

Next, a disc recording / reproducing apparatus using the above-mentioned optical disc will be described below with reference to FIGS. 1 to 4. In this description, a cartridge 41 containing a recordable / reproducible disk body 42 shown in FIG. 8 is used as the optical disk, and the cartridge 41 is also used in the following description.

As shown in FIGS. 1 and 2, the present disc recording / reproducing apparatus has a cartridge holder 1 as a cartridge holding means for holding a substantially rectangular parallelepiped cartridge 41 containing an optical disc or the like as a recording medium, and the above-mentioned cartridge holder. It comprises a pickup 10 as a means for recording / reproducing an optical disk, and a chassis 2 as a base on which recording / reproducing means such as a magnetic head 7 is mounted.

As shown in FIGS. 3 and 4, the cartridge holder 1 is provided with holder supporting angles 5 and 6 provided on both sides of the end of the upper surface of the chassis 2 in the arrow L ₂ direction.
Are supported by support shafts 3 and 4, and are rotatable in the directions of arrows G and H.

As a result, in the disc recording / reproducing apparatus, as shown in FIG. 5, the cartridge 41 is attached / detached while the cartridge holder 1 is rotated in the arrow H direction. That is, the cartridge 41 is moved to the arrow L
_The cartridge 41 is inserted into a predetermined position by moving in _two directions, and the cartridge 41 is pulled out from the cartridge holder 1 by moving in the arrow L ₁ direction. At this time, the magnetic head 7 is in a retracted state at a position where the cartridge 41 is separated. The lifting mechanism for the magnetic head 7 will be described later.

As shown in FIG. 1, the cartridge holder 1 is provided with guide portions 1a and 1b having a substantially U-shaped cross section at both ends in parallel with the storing and discharging direction of the cartridge 41. 1a and 1b guide the storage and discharge of the cartridge 41 in the cartridge holder 1.

The cartridge holder 1 is also provided with a head lifting mechanism (head rotating mechanism) for lifting the magnetic head 7 for modulating the magnetic field of the disk body 42 of the cartridge 41.
The chassis 2 includes the magnetic head 7, the spindle motor 9 for rotationally driving the disk body 42, the pickup 10 for irradiating the disk body 42 with laser light, and the like.

In general, the disc recording / reproducing apparatus is used by being housed in a cabinet 11 as shown in FIG. 6, for example. In this cabinet 11, a lid 12 is provided so as to be rotatable with respect to the cabinet 11 in the directions of arrows G and H, and the cartridge holder 1 is also moved in the directions of arrows G and H in association with the opening / closing operation of the lid 12. It is configured to rotate to.

Therefore, as shown in FIG. 6, when the lid 12 is opened, that is, when the cartridge holder 1 is opened, the operator operates the lid 12
The cartridge 41 is inserted through the opening 12a. At this time, the cartridge 41 is guided by the guide portions 1a and 1b formed on the cartridge holder 1, and the arrow L
Moved in _one direction. As a result, the cartridge 41
Is inserted into a predetermined position of the cartridge holder 1.
Then, by rotating the lid 12 toward the cabinet 11 to close it, recording / reproduction of the cartridge 41 is performed. Further, the lid 12 is opened, and the cartridge holder 1
With the cartridge open, the cartridge 41 is moved in the direction of the arrow L ₂ to eject the cartridge 41. That is, the main cabinet 11 includes the cartridge 4
A so-called top insertion method is used in which 1 is taken in and out from the upper side of the device.

On the other hand, as shown in FIG. 7, if the cartridge 41 is housed when the lid 12 is closed, that is, when the disc is recordable and reproducible, the information is written to the disc body 42. Recording and reproduction of are performed.

The cabinet 11 and the lid 1 described above are used.
2 is provided with operation switches, output terminals and the like, which are not shown.

Now, the cartridge holder 1 will be described in detail with reference to FIGS.

As shown in FIGS. 10 and 11, the cartridge holder 1 has a first bent portion 1c as a shutter opening mechanism for opening the shutter 43 when the cartridge 41 is inserted, and a chassis after the cartridge 41 is inserted. A cartridge pressing lever 13 for fixing the cartridge 41 when set to 2 and a cartridge pressing spring 14 are provided.

That is, when the cartridge 41 is inserted into the cartridge holder 1, the first bent portion 1c of the cartridge holder 1 is engaged with the groove portion 41b of the cartridge 41, abuts against the end portion of the shutter 43, and the shutter 43 is opened. It will be released. The cartridge 41 has a shutter 43.
With the cartridge open lever,
It is fixed at a predetermined position by the cartridge pressing spring 14.

Further, the cartridge holder 1 has a structure shown in FIG.
As shown in 0, a shutter spring 39 is provided, and this shutter spring 39 is inserted into the insertion hole 43a of the shutter 43 of the cartridge 41, and the shutter 43 is moved in the arrow K ₂ direction when the cartridge is ejected.
That is, the pickup window 41a and the magnetic head window 41c of the cartridge 41 are closed by the shutter 43.

Further, the arrow L _{2 of the} cartridge holder 1
A lift motor 15 as a driving means is provided on the end side in the direction.
And the above-described head elevating mechanism 8 that transmits the driving force of the lift motor 15 to the lift lever 17 that elevates and lowers the magnetic head 7. The lift motor 15 uses a motor that can rotate both forward and backward.

The head lifting mechanism 8 is composed of a gear group in which the pinion 8a, the reduction gears 8b and 8c, and the actuator gear 8d are arranged in this order from the lift motor 15 side, and the driving force of the lift motor 15 is lifted. Lever 17
It is designed to be transmitted to.

The lift motor 15 and the head lifting mechanism 8 are fixed by a lift motor angle 16 provided on the cartridge holder 1. The reduction gear 8c and the actuator gear 8d are rotatably supported by a supporting portion 1e provided on the cartridge holder 1.

The actuator gear 8d has a structure shown in FIG.
As it is shown, with the rotation of the actuator gear 8d, and the reduction gear 8c and the actuator gear 8d the journaling of the support portion 1e end face 1e ₁ '· 1e _2' in contact with the actuator 8d 'is provided There is. As a result, the rotation of the actuator gear 8d is restricted within the range of the rotation angle θ.

Further, as shown in FIG. 11, supporting portions 1f and 1g are provided on the upper portion of the cartridge holder 1, and the lift lever 17 is provided by these supporting portions 1f and 1g.
Is rotatably supported. The lift lever 17 is provided with a first contact portion 17 a at the end of the lift lever 17 on the side where the head lifting mechanism 8 is disposed, and the lift lever 1
7, the second contact portion 1 at the end opposite to the side where the head lifting mechanism 8 is provided.
7b is provided.

Further, as shown in FIGS. 13 and 14, the lift lever 17 has a head support angle 21 to be described later.
Is formed with a protrusion 17c having a substantially triangular cross section. The lift lever 17
Is urged by the lift spring 18 in the direction of arrow G, as shown in FIGS. 13 (a) and 14 (a).

The first contact portion 17 of the lift lever 17 described above.
The a is formed so that the lower side of the first contact portion 17a contacts the upper side of the actuator 8d 'of the actuator gear 8d as the actuator gear 8d rotates. That is, as shown in FIG. 13A, from the stopped state of the actuator gear 8d to the actuator gear 8d
When is rotated in the direction of arrow G, as shown in FIG. 14A, the actuator 8d ′ of the actuator gear 8d contacts the first contact portion 17a of the lift lever 17 and resists the urging force of the lift spring 18. The lift lever 17 is rotated in the direction of arrow H.

However, the actuator gear 8d is shown in FIG.
As shown in (b) and FIG. 14 (b), in a range where the actuator 8d ′ abuts on the end faces 1e ₁ ′ and 1e ₂ ′ of the supporting portion 1e provided on the cartridge holder 1, that is, in the range shown in FIG. It is designed to rotate.

As shown in FIGS. 15 (a) and 15 (b), one end of the cartridge holder 1 serves as holder moving means rotatably supported by a support shaft 1j provided in the cartridge holder 1. The release lever 19 is provided. An operation shaft 19a is formed on one end side of the release lever 19 so as to be inserted into the inverted L-shaped groove 27a (FIG. 16) of the release angle 27 provided on the chassis 2, and the other end side of the lift lever 17 is formed. 2nd contact part 1
An abutting portion 19b that abuts the lower surface side of 7b is formed.

Therefore, the release lever 19 is
When rotated in the direction of arrow G, as shown in FIG.
The contact portion 19b of the release lever 19 is brought into contact with the lower surface side of the second contact portion 17b of the lift lever 17, and the lift lever 17 is rotated in the arrow H direction. Then, the lift lever 17 moves the magnetic head 7 up and down.

Next, the chassis 2 will be described in detail with reference to FIGS. 16 to 20.

On the upper surface of the chassis 2, FIG. 16 and FIG.
As shown in FIG. 7, positioning pins for positioning the cartridge 41 and the contact portions 2a, 2b, 2c, 2d are provided, and the cartridge 4 at the recordable / reproducible position.
An ejector spring 20 for discharging 1 is provided. The ejector spring 20 has one end fixed to the chassis 2 and the other end movable in the directions of arrows L ₃ and L ₄ .

As a result, when the cartridge 41 is inserted into the chassis 2, the other end of the ejector spring 20 moves in the direction of the arrow L ₄ while urging the cartridge 41 in the direction of the arrow L _{3 to} move the cartridge 41 to the chassis 2. It is locked by a locking portion 35 provided at the end portion in the direction of the arrow L ₂ . At this time, the cartridge 41 has the positioning pin and the contact portion 2a.
-Holded in place by 2b, 2c and 2d.

The cartridge 41 is released from the engagement state of the engagement portion 35 by a release mechanism (not shown), and is moved in the direction of the arrow L ₃ by the urging force of the ejector spring 20 generated at this time to move from the cartridge holder 1 to the cartridge holder 1. Is discharged.

In addition, the chassis 2 is provided with FIGS.
As shown in FIG. 9, a spindle motor 9 for rotating a disk as a recording medium is provided, and a pickup 10 for irradiating the disk with laser light is also provided. The pickup 10 is adapted to move in the directions of arrows P ₁ and P ₂ by the drive motor 23 along the disk surface.

Further, the chassis 2 is provided with a head support angle 21 for supporting the magnetic head 7. This head support angle 21 is rotatably supported by a support shaft 30 and has a support arm (head rotation support means) 2 having a suspension spring 22a for supporting the magnetic head 7.
2 and is moved together with the pickup 10 by a drive motor 23 that drives the pickup 10.

Further, as shown in FIG. 16, the chassis 2 is provided with an erroneous erasure prevention switch 24, holder supporting angles 5 and 6 for holding the cartridge holder 1, a mechanical substrate (not shown) and the cartridge holder 1. A release angle 27 having an inverted L-shaped groove 27a through which the operation shaft 19a of the release lever 19 is inserted is provided.

The head supporting angle 21 is shown in FIG.
As shown in (b), it is composed of an angle body 28 and a head arm 29 rotatably supported on the upper end side of the angle body 28.

As shown in FIG. 20 (a), the structure of the head support angle 21 is formed at fulcrum holes 28a 'and 28a' formed on both sides of the upper end of the angle body 28 and the end of the head arm 29. Fulcrum hole 29a '・ 29a'
, 29a ', and the support shaft 30 is inserted into each of the fulcrum holes 28a' ... 29a ', and the support shaft 30 is tightened with a tightening nut 31 so that the head arm 29 is rotatable with respect to the angle main body 28. It is installed.
Further, when the head arm 29 is attached to the angle main body 28, the support shaft 30 is inserted through the angle spring 32, and the angle arm 32 biases the head arm 29 in the arrow G direction. The head arm 29 is formed in a substantially L-shape, and its end 29b on the angle body 28 side abuts on the vertical portion 28a of the angle body 28 to restrict movement in the arrow G direction.

Further, the head support angle 21 is provided with an arm thrust spring 33 between the fulcrum holes 28a 'and 28a' to prevent looseness of attachment between the angle body 28 and the head arm 29.

Further, the lower end portion 28b of the angle main body 28
Is connected to the pickup 10 as shown in FIG.
Are adapted to move with the pickup 10.

A support arm 22 is connected to the head arm 29 as shown in FIG. The support arm 22 swingably supports the magnetic head 7 at the tip of the suspension spring 22a.

Now, with reference to FIGS. 21 to 32, description will be given below of the magnetic head raising / lowering operation, the cartridge attaching / detaching operation and the releasing operation in the disk recording / reproducing apparatus having the above-mentioned structure.

First, the elevation of the magnetic head, that is, the operation of the head supporting angle 21, will be described below with reference to FIGS. 21 to 23.

As shown in FIG. 21 (a), when the cartridge holder 1 is rotated in the direction of arrow H and the cartridge holder 1 is at the detachable position of the cartridge 41,
The head arm 29 of the head support angle 21 is locked in a state of rotating in the arrow H direction.

At this time, the lift lever 17 is pushed up in the direction of the arrow H by the rotation of the actuator gear 8d, and the protrusion 17c of the lift lever 17 contacts the contact member 29a provided on the lower surface of the head arm 29. Then, the head arm 29 is held in the state of being rotated in the arrow H direction, that is, the support arm 22 supporting the magnetic head 7 is also held in the state of being rotated in the arrow H direction.
Therefore, the space H ₁ between the support arm 22 supporting the magnetic head 7 and the cartridge holder 1 (hereinafter referred to as clearance) is kept constant. The clearance H ₁ is set by the thickness of the contact portion member 29a of the head arm 29 described above.

When the cartridge holder 1 is rotated in the direction of the arrow G about the holder supporting angles 5 and 6 as a fulcrum and the cartridge holder 1 is at the recording / reproducing position of the cartridge 41 as shown in FIG. The support angle 21 is also locked in a state of rotating in the arrow G direction. At this time, the lift lever 17 is held in a state in which the lift lever 17 itself is rotated in the arrow H direction without rotating the actuator gear 8d.

Therefore, also in this state, the lift lever 17 is pushed up in the direction of the arrow H by the rotation of the actuator gear 8d, and the projection 17c of the lift lever 17 abuts the abutting member 29a of the head arm 29. Then, the head arm 29 is held in the state of being rotated in the arrow H direction, that is, the support arm 22 supporting the magnetic head 7 is also held in the state of being rotated in the arrow H direction.

As a result, the clearance H between the support arm 22 for supporting the magnetic head 7 and the cartridge holder 1
₂ is held constant. In this state, since the magnetic head 7 is not moved to the cartridge 41 side, only reproduction is possible.

Further, the contact member 2 of the head arm 29 described above.
As shown in FIG. 23 (b), an inclined portion M is formed from the lower surface portion N to the flat surface portion L of the head arm 29 with a predetermined thickness, and is inclined toward the arrow L ₂ direction side.
Abutting member 29 formed in a substantially triangular shape in cross section
c may be used. That is, as shown in FIG. 23A, when the cartridge holder 1 is at the reproduction position, the projection 17c of the lift lever 17 contacts the flat surface portion L of the contact member 29c, and the cartridge holder 1 is held by the cartridge 41. 2 in the removable position of FIG.
As shown in FIG. 4, the contact member 29c contacts the lower surface N of the head arm 29 via the inclined portion M of the contact member 29c.

Therefore, in the case where the support shaft 30, the holder support angle 5 and the like are arranged at different positions as in the present disk recording / reproducing apparatus, as shown in FIG. When the axis passing through the support shaft 3 of the holder support angle 5 of the cartridge holder 1 is X and the axis orthogonal thereto is Y, the support arm 22 in the reproducing state is a contact member formed on the lower surface of the head arm 29. The magnetic head 7 maintains the clearance H ₁ with respect to the cartridge holder 1 by the protrusion 17c of the lift lever 17 coming into contact with 29c. At this time, the contact member 2 of the head arm 29
The angle formed by the axis X and the abutting portion L between the protrusion 9c of the lift lever 17 and 9c is θ ₁ °.

Further, since the cartridge holder 1 ejects the cartridge 41, as shown in FIG.
It is assumed that it has rotated θ ₃ ° in the direction. At this time, in the lift lever 17, since the holder support angle 5 is provided on the cartridge holder 1, the contact portion L between the contact member 29c of the head arm 29 and the protrusion 17c of the lift lever 17 is the contact portion. Move to N. At this time, the angle θ ₂ ° formed between the contact portion N and the reference axis X ′ after the rotation is the same as θ ₁ °.

As described above, the support shaft 30 of the support arm 22 is
25 is not on the same fulcrum as the holder support angle 5 of the cartridge holder 1, as shown in FIG. 25, the position Z of the magnetic head 7 when the cartridge holder 1 is in the reproducing position is θ in the direction of arrow H when the cartridge holder 1 is in the direction H. ₃ °
When it rotates, it moves to the position Z '. At this time, as described above, the protrusion 17c of the lift lever 17 moves from the contact portion L of the contact member 29c of the head arm 29 to the contact portion N via the inclined portion M. Therefore, the position of the magnetic head 7 when the cartridge holder 1 is rotated by θ ₃ ° in the direction of the arrow H from the difference in height between the contact portion L and the contact portion N, that is, the inclined portion M, is the same as the conventional position. It will be lower than.

As described above, by making the contact member 29c of the head arm 29 have a triangular cross section, FIG.
As shown in FIG. 4, the clearance between the magnetic head 7 and the cartridge holder 1 when the cartridge holder 1 is at the detachable position of the cartridge 41 can be maintained by H ₃ . Since this clearance H ₃ can be made smaller than the clearance H ₁ between the magnetic head 7 and the cartridge holder 1 when the contact member 29a is used for the head arm 29, the apparatus can be made thinner. Is possible.

Therefore, the abutting member 29b of the head arm 29 serves as a proper clearance holding means and always maintains a proper clearance between the support arm 22 supporting the magnetic head 7 and the cartridge holder 1. ing.

Further, in the disc recording / reproducing apparatus, in the state shown in FIG. 22, that is, in the reproducing state, the cartridge 41 set in the cartridge holder 1 can be operated by the erroneous erasure prevention switch 24 provided in the chassis 2. Whether the medium is a read-only recording medium or a recordable / reproducible medium is determined, and if it is a recordable / reproducible medium,
It is determined whether or not erroneous recording is prohibited, and power is supplied to the lift motor 15 by a circuit (not shown) as necessary.

Next, with respect to the elevation of the magnetic head 7 after the cartridge 41 is set in the chassis 2 and the disk body 42 is chucked by the spindle motor 9, FIG.
This will be described below with reference to FIGS.

As shown in FIG. 26, the disc main body 42
Are chucked to the spindle motor 9 by a suction means such as a magnet. Further, the pickup 10 and the magnetic head 7 are installed so as to be movable in the directions of the arrows P ₁ and P ₂ by being linked by a driving means (not shown).

As shown in FIG. 27, the magnetic head 7 is supported by the lift lever 17 with the clearance H ₂ maintained with respect to the cartridge 41. From this state, supplies power to the lift motor 15, the actuator gear 8d, as shown in FIG. 13 (b), an arrow H 'to the actuator 8d' end surfaces 1e ₂ of the support portion 1e of the cartridge holder 1 until it abuts Rotate in the direction.

At this time, the first contact portion 17a of the lift lever 17 and the actuator 8 of the actuator gear 8d
The contact with d ′ is released, and as shown in FIG. 28, the lift lever 17 rotates in the arrow G direction with the fulcrum shaft 34 of the lift lever 17 as a fulcrum to be in the locked state. Further, the head arm 29 of the head support angle 21 is the head arm 2
9 abutting member 29c and the protrusion 17c of the lift lever 17
Since the contact with the magnetic head 7 is released, the magnetic head 7 rotates in the direction of the arrow G about the support shaft 30 and the end 29b of the head arm 29 contacts the angle body 28, as shown in the figure. 7 can come into contact with the disc body 42.

As described above, in order to rotate each gear of the head elevating mechanism 8 in an arbitrary direction, the lift motor 15 is operated for a certain period of time to move the magnetic head 7 to the disk body 42.
It is designed to be detached from. That is, the magnetic head 7 is moved up and down.

The eject of the cartridge 41 is
As shown in FIG. 22, the cartridge holder 1 rotates from the reproducible position by an angle θ _{3 in the} direction of arrow H, and
16, the ejector spring 20 shown in FIG. 16 is unlocked at the locking portion 35 by this rotational movement, and the ejector spring 20 is urged by the ejector spring 20 to cause an arrow. It is discharged in the L ₁ direction. At this time, since the magnetic head 7 is always rotated with a predetermined clearance with respect to the cartridge holder 1, problems such as head crash do not occur.

Next, the release operation of the magnetic head 7 from the recording state in the disk recording / reproducing apparatus will be described with reference to FIG.
Will be described below with reference to.

As shown in FIG. 29A, in a normal recording state, the release lever 19 is rotatably supported by the support shaft 1j on the side surface of the cartridge holder 1, and the operation formed on the release lever 19 is performed. The shaft 19a has an inverted L-shaped groove 27 of a release angle 27 provided on the chassis 2.
It is in contact with the lower end of a.

In this state, the release lever 19 is not in contact with the second contact portion 17b of the lift lever 17, and the lift lever 17 has not yet been operated, so that the magnetic head 7 is not moved.

From the above state, as shown in FIG.
When the cartridge holder 1 is rotated in the direction of arrow H, the release lever 19 moves along the inverted L-shaped groove 27a of the release angle 27 of the operation shaft 19a, and rotates in the direction of arrow G with the support shaft 1j as the fulcrum. . The contact portion 19b of the release lever 19 is connected to the second contact portion 1 of the lift lever 17.
After abutting against 7b, the lift lever 17 rotates in the direction of arrow H with the fulcrum shaft 34 as a fulcrum in accordance with the rotation of the release lever 19 to disengage the magnetic head 7 from the cartridge 41 and the cartridge holder 1. .

Further, in the inverted L-shaped groove 27a of the release angle 27, an arcuate arc wall (first guide portion) 2 having a support shaft 3 which is a pivotal fulcrum of the cartridge holder 1 as a fulcrum.
7b is formed. The movement axis 19 is attached to the arc wall 27b.
When a is in sliding contact, the release lever 19 does not rotate with respect to the support shaft 1j of the cartridge holder 1, so that the lift lever 17 also maintains the same state with respect to the cartridge holder 1, and the magnetic head 7 and the cartridge holder 1 also. 1 and the cartridge 41 are rotated while maintaining a constant clearance H ₃ .

FIG. 29C shows the cartridge holder 1
Shows a state in which the support shaft 3 is further pivotally moved as a fulcrum.
Is moving on the circular arc wall 27b, so that the circular arc moves about the support shaft 3 as a fulcrum. Release angle 2
In the inverted L-shaped groove 27a provided in 7, a groove wall (second guide portion) 27c formed by a tangent line centering on the support shaft 1j is formed, and released by the groove wall 27c and the arc wall 27b. Rotation of the lever 19 in the arrow H direction is restricted.

Generally, the cartridge 41 from the recording state
The basic operation is to perform the eject of the magnetic head 7 after the magnetic head 7 is avoided from detaching from the disk main body 42. However, this is not limited to the set drop in the actual use state, the emergency eject in the emergency, and the like. 41 may be ejected carelessly. Therefore, the magnetic head 7 may be ejected in a state of being inserted into the cartridge 41, and the magnetic head 7 may be damaged.

However, even if the eject operation is performed during recording, the magnetic head 7 can be reliably separated from the cartridge 41 and the disk body 42 as described above, and therefore, the cartridge 41 and the disk body 42.
It is possible to avoid a head crash to the magnetic head 7 due to the. Therefore, there is no risk of damaging the magnetic head 7 even if it is ejected carelessly during recording.

Further, since the rotation of the release lever 19 is regulated by the release angle 27, the opening / closing angle of the cartridge holder 1 can be regulated, whereby the clearance between the magnetic head 7 and the cartridge holder 1 can be regulated. It becomes possible to keep it properly.

Now, the cartridge attaching / detaching operation in the disk recording / reproducing apparatus having the above construction will be described below with reference to FIGS. 30 to 32. The disc recording / reproducing apparatus is assumed to be housed in a cabinet 51 having a lid 52.

First, when the cartridge 41 is taken out from the recording state shown in FIG. 30, the eject lever (not shown) is operated. At this time, the lid 52 rotates in the direction of the arrow H, and the state shown in FIG. 31 is obtained. In the state shown in FIG. 31, the magnetic head 7 has not been released yet,
The movement of the cartridge 41 in the arrow L ₁ direction is regulated by a locking portion 51a provided in the cabinet 51 as a separation regulation member. As a result, the cartridge 4 with the magnetic head 7 released incompletely is released.
It is possible to prevent the magnetic head 7 from being damaged due to the removal of 1.

Then, when the lid 52 is further rotated in the direction of the arrow H, as shown in FIG.
Rotates in the direction of arrow G, and the contact portion 1 of the release lever 19
9b contacts the second contact portion 17b of the lift lever 17,
The lift lever 17 is rotated in the arrow H direction. By the rotation of the lift lever 17 in the arrow H direction, the head arm 29 rotates in the arrow H direction, and the magnetic head 7 is detached from the cartridge 41 and the disk body 42. In this state, the cartridge 41 is first attached to the cartridge holder 1
To move in the direction of arrow L ₁ and take out.

The cartridge 41 may be inserted and removed by performing the operation opposite to the above-mentioned operation for taking out the cartridge 41. That is, in the state shown in FIG. 32, by moving the cartridge 41 in the arrow L ₂ direction of arrow L ₂ direction end portion of the cartridge 41 deflects the ejector spring 20, ejector spring 20 is engaged by the locking portion 35 located Is inserted up to. When the cartridge 41 is inserted into the cartridge holder 1 at a predetermined position, the lid 52 is rotated in the direction of the arrow G to close the cabinet 11 and bring the disc recording / reproducing apparatus into a recordable / reproducible state.

By the way, in the release operation of the magnetic head 7, the rotational movement of the cartridge holder 1 in the direction of the arrow H is indispensable, but it is impossible to avoid the magnetic head 7 completely at the initial stage of the rotational movement. . However,
As shown in FIG. 31, the locking portion 51 a of the cabinet 51
As a result, the attachment / detachment of the cartridge 41 during the rotating operation is prevented. A similar effect can be obtained by the positioning pin 2a provided on the chassis 2.

Therefore, the cartridge 4 in the avoidance operation
It is possible to prevent damage to the magnetic head 7 due to attachment / detachment of the magnetic head 1, that is, head crash. Further, as the cartridge holder 1 rotates, the cartridge 41 can be attached and detached as shown in FIG.

As described above, in the disk recording / reproducing apparatus having the above structure, the lift motor 15 transmits the driving force to the lift lever 17 via the head lifting mechanism 8 composed of a plurality of gears. Therefore, the output of the motor can be directly transmitted to the lift lever 17.

Thus, when the magnetic head 7 is in the standby state at the reproducing position, it becomes possible to dispose the lift motor 15 and the head elevating mechanism 8 in the space of the required housing. It is not necessary to provide the lift motor 15 and the like on the back side of the device. Further, the complicated driving force transmission mechanism for transmitting the driving force from the lift motor 15 arranged on the back side can be eliminated. Therefore,
Since the constituent members of the device can be simplified and the device can be made thin, the cost and size of the device can be reduced.

Also, the release lever 1 for rotating the lift lever 17 in accordance with the rotation of the cartridge holder 1.
By providing 9, the lift lever 17 can be rotated without depending on the driving force of the lift motor 15 described above.

As a result, the magnetic head 7 can be rotated to the retracted position in conjunction with the rotation of the cartridge holder 1. Therefore, when the cartridge 41 is removed, the magnetic head 7 is always retracted. In this state, the cartridge 41 can be removed from the cartridge holder 1. Therefore, it is possible to prevent the magnetic head 7 from being damaged and prevent the cartridge 41 from being pulled out, thereby improving the operability of the apparatus.

Further, when the cartridge holder 1 is at the recording / reproducing position, the release lever 19 is rotated in association with the rotation of the cartridge holder 1.
The circular arc wall 27b for guiding the release lever 19 and the release lever 19 rotate integrally with the cartridge holder 1 when the cartridge holder 1 rotates from the recordable / reproducible position to the attachable / detachable position. Since the release angle 27 including the groove wall 27c that guides the release lever 19 is provided, the rotation timing of the release lever 19 can be adjusted by the rotation angle of the cartridge holder 1.

As a result, since the magnetic head 7 can be rotated in conjunction with the rotation of the cartridge holder 1, the cartridge 41 can be always attached and detached while the magnetic head 7 is retracted. Therefore, the damage of the magnetic head 7 due to the removal operation of the cartridge 41 can be eliminated, and the operability of the apparatus can be improved.

In the present embodiment, the driving force of the lift motor 15, which is a motor capable of both forward and reverse rotation, is applied to the head lifting mechanism 8.
Although the lift lever 17 is moved up and down by the transmission, the present invention is not limited to this, and a stepping motor may be used as the lift motor 15, for example. Since the stepping motor controls the rotation angle of the motor by an electric pulse,
When a stepping motor is used as the lift motor 15, the head lifting mechanism 8 composed of a plurality of gears for decelerating the rotation of the motor as in the above embodiment is unnecessary,
The configuration of the device can be further simplified, and the device can be downsized.

[0145]

As described above, the disk recording / reproducing apparatus according to the first aspect of the present invention irradiates the disk housed in the cartridge with laser light by the pickup, and generates a magnetic field by the magnetic head according to the recording signal. In a disc recording / reproducing apparatus for generating and recording information, the base having the pickup and the cartridge are held, and the cartridge is reciprocally rotated to a removable position and a recordable position of the cartridge with respect to the base. And a head rotation support means that moves integrally with the pickup and rotatably supports the magnetic head between a recording position and a reproduction position. Head rotation connecting means for rotating the head rotation support means and drive means for rotating the head rotation support means are provided, and the drive means is provided. Stage is a configuration that is directly connected to the head pivotably connecting means.

As a result, when the magnetic head is in the standby state at the reproducing position, it becomes possible to dispose the motor in the space of the required housing, so that the motor is provided on the back side of the device as in the conventional case. It is not necessary and the complicated driving force transmission mechanism for transmitting the driving force from the motor arranged on the back side can be eliminated.

Therefore, since the constituent members of the device can be simplified and the device can be made thin, there is an effect that the cost and size of the device can be reduced.

In the disk recording / reproducing apparatus according to the second aspect of the present invention, as described above, the disk housed in the cartridge is irradiated with the laser beam by the pickup, and the magnetic field is generated by the magnetic head according to the recording signal. In a disc recording / reproducing apparatus for generating and recording information, the base having the pickup and the cartridge are held, and the cartridge is reciprocally rotated to a removable position and a recordable position of the cartridge with respect to the base. And a head rotation support means that moves integrally with the pickup and rotatably supports the magnetic head between a recording position and a reproduction position. Head rotation connecting means for rotating the head rotation supporting means and the head rotation connecting means for rotating the holder. Ruda moving means is configured to provided.

As a result, the magnetic head can be rotated to the retracted position in conjunction with the rotation of the holder.
You can always remove the cartridge from the holder without hitting the magnetic head.

Therefore, it is possible to prevent the magnetic head from being damaged and to prevent obstruction of the withdrawal of the cartridge, thereby improving the operability of the apparatus.

Further, in the disk recording / reproducing apparatus according to the third aspect of the present invention, as described above, when the holder is at the recording / reproducing position on the base, the holder moving means rotates in association with the rotation of the holder. As described above, the first guide part for guiding the holder moving means and the holder moving means integrally rotate with the holder when the holder rotates from the recordable / reproducible position to the attachable / detachable position. A holder movement guide means including a second guide portion for guiding the holder movement means is provided.

With this, the magnetic head can be rotated in association with the rotation of the holder, so that the cartridge can be always attached and detached with the magnetic head retracted.

Therefore, the operability of the apparatus can be improved.

According to the disk recording / reproducing apparatus of the present invention, as described above, the disk housed in the cartridge is irradiated with the laser beam by the pickup, and the magnetic field is generated by the magnetic head according to the recording signal. In a disc recording / reproducing apparatus for generating and recording information, the base having the pickup and the cartridge are held, and the cartridge is reciprocally rotated to a removable position and a recordable position of the cartridge with respect to the base. And a head rotation supporting means that moves integrally with the pickup and that rotatably supports the magnetic head between a recording position and a reproducing position, and the head rotation supporting means provided in the holder. Has a center of rotation different from the center of rotation of the head, and the head rotates to come into contact with the head rotation support means to rotate the head rotation support means. When the holder is rotated from the recordable / reproducible position to the cartridge attachable / detachable position on at least one side of the contact portion between the head rotation supporting means and the head rotation connecting means. ,
This is a configuration in which a proper gap holding means for properly holding the gap between the magnetic head and the cartridge is provided.

As a result, the gap between the magnetic head and the cartridge can be kept small when the holder is in the removable position of the cartridge, so that the device can be made thin, and as a result, the device can be made compact. The effect is that it can be realized.

Further, in the disk recording / reproducing apparatus according to the fifth aspect of the present invention, as described above, the cartridge is regulated so as not to be removed from the holder while the holder is rotated from the recording / reproducing position to the cartridge removable position. It is the structure provided with the removal control member.

As a result, the cartridge can be taken out while the magnetic head is completely retracted from the cartridge, so that the magnetic head can be prevented from being damaged when the cartridge is attached or detached.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a disk recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a plan view showing the correspondence between the disc recording / reproducing apparatus shown in FIG. 1 and a cartridge.

3 is a side view of the disc recording / reproducing apparatus shown in FIG. 1. FIG.

FIG. 4 is a rear view of the disc recording / reproducing apparatus shown in FIG.

5 is a side view illustrating a state in which a cartridge is removed from the disc recording / reproducing device shown in FIG.

6 is a perspective view showing a cabinet equipped with the disk recording / reproducing device shown in FIG. 1, and is a perspective view at a cartridge attachable / detachable position.

7 is a perspective view showing a cabinet equipped with the disc recording / reproducing device shown in FIG. 1, and is a perspective view at a disc recording / reproducing position.

8 shows a recordable / reproducible disc applied to the disc recording / reproducing apparatus shown in FIG. 1, in which (a) is a side view, (b) is a plan view, and (c) is a front view. d) is a bottom view.

9 shows a reproducible disc applied to the disc recording / reproducing apparatus shown in FIG. 1, in which (a) is a side view, (b) is a plan view, (c) is a front view, and (d). ) Is a bottom view.

10 is a schematic perspective view of a cartridge holder provided in the disc recording / reproducing apparatus shown in FIG.

FIG. 11 is the cartridge holder shown in FIG. 10, in which (a) is a side view, (b) is a plan view, and (c) is a rear view.

12 is a side view showing a head lifting mechanism provided in the cartridge holder 1 shown in FIG.

13A and 13B are diagrams showing an operation of the head lifting mechanism shown in FIG. 12, wherein FIG. 13A is a side view showing a state where a gear actuator of the head lifting mechanism and a lift lever are not in contact with each other, and FIG. It is a side view which shows the contact relationship of the actuator and the contact part of a cartridge holder at the time of (a).

FIG. 14 is a side view showing an operation of the head elevating mechanism shown in FIG. 12, in which a gear actuator of the head elevating mechanism and a lift lever are in contact with each other and the lift lever is rotated. And (b) is a side view showing the contact relationship between the actuator and the contact portion of the cartridge holder at the time of (a).

15A and 15B show a release mechanism of the cartridge holder shown in FIG. 10, wherein FIG. 15A is a side view showing a state where the lift lever by the release lever does not rotate, and FIG. It is a side view which shows the state which the lift lever rotated by the movement.

16 is a schematic configuration perspective view of a chassis provided in the disc recording / reproducing apparatus shown in FIG.

17 is a plan view of the chassis shown in FIG.

FIG. 18 is a side view of the chassis shown in FIG.

FIG. 19 is a rear view of the chassis shown in FIG.

20A and 20B show head supporting angles provided in the chassis shown in FIG. 16, in which FIG. 20A is an exploded perspective view, FIG. 20B is a schematic configuration perspective view, and FIG. It is a side view which shows a state.

21A and 21B show a positional relationship between the cartridge holder and the magnetic head in the cartridge mounting / removing state in the disk recording / reproducing apparatus shown in FIG. 1, in which FIG. 21A is a side view and FIG. FIG.

22 is a side view showing the positional relationship between the cartridge holder and the magnetic head in the disc recording / reproducing state in the disc recording / reproducing apparatus shown in FIG. 1. FIG.

23A and 23B show a contact state between a head support angle and a lift lever in a disc recording / reproducing state in the disc recording / reproducing apparatus shown in FIG. 1, where FIG. 23A is a side view and FIG. 3] is an enlarged side view of the main part of FIG.

24 is a schematic cross-sectional view showing the positional relationship of the magnetic head with respect to the cartridge when the disc recording / reproducing apparatus shown in FIG. 1 is housed in a cabinet.

25 is an explanatory diagram showing a positional relationship between the magnetic head and the cartridge in the state shown in FIG.

26 is a plan view of a magnetic head lifting mechanism in the disk recording / reproducing apparatus shown in FIG.

27 is a side view of the magnetic head lifting mechanism shown in FIG. 26 when the magnetic head is at the standby position.

28 is a side view of the magnetic head lifting mechanism shown in FIG. 26 when the magnetic head is at the reproducing position.

29 is a diagram showing the disk recording / reproducing apparatus shown in FIG.
3A and 3B are diagrams for explaining an operation of pulling out a cartridge during a recording operation. FIG. 1A is a side view showing a recording state, and FIG. 6B is a side view showing a state where a magnetic head is detached from a cartridge by rotating a release lever. FIG. 3C is a side view showing a state in which the cartridge holder is rotated to the cartridge attachable / detachable position.

30 is a schematic cross-sectional view showing a state where the disc recording / reproducing apparatus shown in FIG. 1 is housed in a cabinet.

FIG. 31 is a schematic cross-sectional view showing the initial state of the cartridge attaching / detaching operation in the disc recording / reproducing apparatus in the state shown in FIG. 30.

32 is a schematic cross-sectional view showing a state in which the lid body is opened up to the cartridge attachable / detachable position in the disc recording / reproducing apparatus in the state shown in FIG. 30.

FIG. 33 is a schematic plan view showing a conventional disc recording / reproducing apparatus.

34 is a side view of the disc recording / reproducing apparatus shown in FIG. 33. FIG.

35 is a view showing a drive mechanism of a lift lever included in the disc recording / reproducing apparatus shown in FIG. 33,
(A) is a plan view of a lift lever drive mechanism, (b) is a side view of the lift lever drive mechanism, and (c) is a side view of a disk recording / reproducing apparatus provided with the lift lever mechanism.

36 is a view showing a drive mechanism of a lift lever included in the disc recording / reproducing apparatus shown in FIG. 33,
(A) is a plan view of a lift lever drive mechanism, (b) is a side view of the lift lever drive mechanism, and (c) is a side view of a disk recording / reproducing apparatus provided with the lift lever mechanism.

37 is a plan view showing a state in which a circuit board is arranged in the disc recording / reproducing apparatus shown in FIG. 33.

38 is a cross-sectional view taken along the line QQ of FIG. 37.

39 is a cross-sectional view illustrating a set height when the disc recording / reproducing device shown in FIG. 33 is arranged in a cabinet.

FIG. 40 is a sectional view for explaining the positional relationship between the magnetic head and the cartridge in the conventional disc recording / reproducing apparatus.

FIG. 41 is a sectional view for explaining the positional relationship between the magnetic head and the cartridge in the conventional disc recording / reproducing apparatus.

FIG. 42 is a schematic diagram illustrating a positional relationship between a magnetic head and a cartridge in a conventional disc recording / reproducing device.

FIG. 43 is a graph illustrating the positional relationship between the magnetic head and the cartridge in the conventional disc recording / reproducing apparatus.

FIG. 44 is a view for explaining damage to the magnetic head when the cartridge is replaced in the conventional disc recording / reproducing apparatus, and FIG. 44 (a) is a side view showing a state in which the cartridge holder is at the recording position; 8B] is a side view showing a state in which the cartridge holder is at the cartridge unloading position.

[Explanation of symbols]

1 Cartridge Holder (Holder) 2 Chassis (Base) 7 Magnetic Head 8 Head Elevating Mechanism (Head Rotation Connecting Means) 9 Spindle Motor 10 Pickup 15 Lift Motor ( Drive Means ) 19 Release Lever (Holder Moving Means) 19a Operation Axis 22 Support arm (head rotation support means) 27 Release angle (holder movement guide means) 27b Arc wall (first guide portion) 27c Groove wall (second guide portion)

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shiho Shibasaki 22-22 Nagaike-cho, Abeno-ku, Osaka City, Osaka Prefecture Sharp Corporation (56) References JP-A-5-205385 (JP, A) JP-A-6- 36386 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G11B 11/10-11/105

Claims (5)

(57) [Claims] 1. A disc stored in a cartridge,
In a disc recording / reproducing apparatus for irradiating a laser beam by a pickup and generating a magnetic field by a magnetic head according to a recording signal to record information, a base having the pickup and the cartridge are held, A holder that reciprocally rotates with respect to the base between an attachable / detachable position and a recordable / reproducible position, integrally moves with the pickup, and rotatably supports the magnetic head between a recording position and a reproducing position. Head rotation support means, and the holder is provided with head rotation connection means for rotating the head rotation support means by rotation of itself and drive means for rotating the head rotation support means. is, the drive means, the disk recording and reproducing apparatus characterized by being directly connected to said head rotatable connecting means. 2. A disk stored in a cartridge,
In a disc recording / reproducing apparatus for irradiating a laser beam by a pickup and generating a magnetic field by a magnetic head according to a recording signal to record information, a base having the pickup and the cartridge are held, A holder that reciprocally rotates with respect to the base between an attachable / detachable position and a recordable / reproducible position, integrally moves with the pickup, and rotatably supports the magnetic head between a recording position and a reproducing position. Head rotation support means, the head rotation connection means for rotating the head rotation support means by the rotation of the holder, and the head rotation connection means according to the rotation of the holder. A disk recording / reproducing device, characterized in that a holder moving means for rotating the disk is provided. 3. A first guide for guiding the holder moving means on the base so that the holder moving means rotates in conjunction with the rotation of the holder when the holder is at a recording / reproducing position. And a second guide part for guiding the holder moving means so that the holder moving means rotates integrally with the holder when the holder rotates from the recording / reproducing position to the removable position. 3. The disk recording / reproducing apparatus according to claim 2, further comprising holder movement guide means. 4. A disc stored in a cartridge,
In a disc recording / reproducing apparatus for irradiating a laser beam by a pickup and generating a magnetic field by a magnetic head according to a recording signal to record information, a base having the pickup and the cartridge are held, A holder that reciprocally rotates with respect to the base between an attachable / detachable position and a recordable / reproducible position, integrally moves with the pickup, and rotatably supports the magnetic head between a recording position and a reproducing position. The head rotation support means is provided on the holder and has a rotation center different from the rotation center of the head rotation support means, and the head rotation support means comes into contact with the head rotation support means by its own rotation. Head rotation connecting means for rotating the means, and at least one side of the contact portion between the head rotation supporting means and the head rotation connecting means. When the holder is rotated in a detachable position of the cartridge from the recordable and reproducible position, the disk recording and reproducing apparatus characterized by proper gap holding means for properly holding the gap between the magnetic head and the cartridge are provided. 5. A release restricting member for restricting the cartridge from being removed from the holder while the holder is rotated from the recordable / reproducible position to the attachable / detachable position of the cartridge. 2. The disk recording / reproducing apparatus according to 2, 3 or 4.