JPH0696490A - Information signal recording and reproducing device - Google Patents

Abstract

PURPOSE:To facilitate the discrimination of a cartridge in which a magneto- optical disk capable of writing is housed and a cartridge in which a disk used exclusively for reproduction is housed, without providing a chamfer or a groove on the cartridge, and also to contrive a simplification of structure of the discriminating mechanism and a reduction of the installing space of the mechanism. CONSTITUTION:A supporting arm 41 is freely rotatably mounted through a supporting shaft 35 on a link arm 40 integrally formed at the end part of a pedestal 39 whereon an optical pickup 24 is fixed. A hinge 43 is provided nearly at the center part of this supporting arm 41, and further a magnetic head 23 is mounted at the lower surface of a tip of the tip part 41a. This tip part 41a is always pressed downward by a coil spring 46. An operating arm 47 is firmly fixed on the upper surface of a cartridge holder 21 in the lower part of the supporting arm 41. A hinge 48 is provided at the rear part of this operating arm 47, and further at the lower surface of the tip, a protrusion 50 is arranged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information signal recording / reproducing apparatus which uses as a recording medium a cartridge accommodating a disc in which desired information signals are recorded such as an optical disc and a magneto-optical disc. The present invention relates to an information signal recording / reproducing apparatus capable of selectively using a cartridge in which a recording / reproducing magneto-optical disk capable of re-recording an information signal is accommodated.

[0002]

2. Description of the Related Art Conventionally, there has been proposed a magneto-optical disk capable of recording a desired information signal by irradiating a signal recording layer with a light beam and applying an external magnetic field. An information signal recording / reproducing apparatus using this magneto-optical disk as a recording medium,
An optical pickup for irradiating the signal recording layer of the magneto-optical disk with a light beam and an external magnetic field applying means for applying an external magnetic field to the signal recording layer, that is, a magnetic head are provided.

In this information signal recording / reproducing apparatus, when a desired information signal is recorded, an optical pickup is made to face one main surface of the magneto-optical disk and the other main surface side of the magneto-optical disk is provided. A magnetic head is made to face each other, a light beam emitted from the optical pickup is irradiated to the signal recording layer of the magneto-optical disk, and an external magnetic field is applied from the magnetic head to the signal recording layer to output a desired information signal. Recording is done. In this case, the magnetic head is brought close to or in sliding contact with the other main surface of the magneto-optical disk.

By the way, a cartridge in which the magneto-optical disk is rotatably housed is used for convenience of management and carrying of the magneto-optical disk. In this cartridge, two openings are formed on both sides of the cartridge so that the magneto-optical disk is exposed to the outside, and a shutter for blocking the two openings is provided. Usually, this shutter is located on the side that shields the opening.

Therefore, an information signal recording / reproducing apparatus (hereinafter simply referred to as a recording / reproducing apparatus) for recording / reproducing an information signal on / from a magneto-optical disk is a recording / reproducing apparatus in which the cartridge is provided with an optical pickup and a magnetic head. The mechanism is provided with a cartridge holder that can be taken in and out.

An opening / closing mechanism for opening / closing the shutter of the cartridge when the cartridge is inserted is attached to the cartridge holder. Therefore, when the cartridge is inserted into the cartridge holder, the shutter of the cartridge holder is first opened by the shutter mechanism, and the magneto-optical disk inside the cartridge is exposed inside the apparatus through the opening.

When the cartridge is completely inserted in the cartridge holder, the central portion of the magneto-optical disk in the cartridge holder is mounted on the disk table of the spindle motor (spindle motor. The part exposed through the opening faces the optical pickup and the magnetic head, respectively, and the magnetic head enters the magneto-optical disk side through the opening and comes close to a position at a predetermined distance from the magneto-optical disk. It is fixed or comes into direct contact with the magneto-optical disk, and at this time, information signals can be recorded and reproduced on the magneto-optical disk.

Further, recently, in addition to the cartridge in which the magneto-optical disk is accommodated in the cartridge holder, a reproduction-only magneto-optical disk or an optical disk (hereinafter simply referred to as a reproduction-only disk) is rotatably accommodated. A recording / reproducing apparatus has been proposed in which the above-described cartridge can be inserted. The cartridge in which the read-only disc is housed has an opening provided on only one side thereof, and a shutter is also provided corresponding to the one opening.

When the cartridge containing the read-only disc is inserted into the cartridge holder, it is inserted so that the surface provided with the opening faces the optical pickup in the recording / reproducing apparatus. Therefore, when this cartridge is inserted into the cartridge holder, first, when the shutter is opened and closed by the shutter opening / closing means and the cartridge is completely inserted into the cartridge holder, the portion of the read-only disc exposed through the opening is not exposed. It will face the optical pickup. At this time, the surface facing the magnetic head has no opening and remains shielded.

In such a state, when the magnetic head moves toward the cartridge as it is, the tip of the magnetic head collides with the shielded surface of the cartridge, which damages the cartridge and the magnetic head, and thus the magnetic head. However, there is a problem in that the mechanism for moving in the direction of approaching and separating is damaged.

Therefore, only when the magneto-optical disk capable of writing the above-mentioned information signal is mounted, the magnetic head is allowed to enter the position close to or in contact with the magneto-optical disk through the opening. When a read-only disc is loaded, it is conceivable to attach a mechanism for holding the magnetic head at a position separated from the read-only disc.

[0012]

However, such a mechanism has a problem in that its structure may be complicated, resulting in an increase in size of the recording / reproducing apparatus itself and an increase in manufacturing cost.

Therefore, at present, a notch or groove is provided in a part of the cartridge, and a cartridge containing a writable magneto-optical disc and a read-only disc are accommodated depending on the depth of the groove and the position where the notch is formed. There has been proposed a method of discriminating the stored cartridge. According to this method, the discrimination mechanism can be simplified, but there is a possibility that the notch and the groove as described above cannot be provided in the standard, and thus it is not an optimal method.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a cartridge in which a writable magneto-optical disk is accommodated without providing a notch or a groove in the cartridge and a read-only cartridge. It is an object of the present invention to provide an information signal recording / reproducing apparatus capable of easily discriminating a cartridge accommodating a disc, and simplifying the structure of the discriminating mechanism and reducing the installation space of the mechanism. .

[0015]

DISCLOSURE OF THE INVENTION According to the present invention, a disc-shaped recording medium 1A is rotatably accommodated, and two openings 3 and 4 for exposing both sides of the disc-shaped recording medium 1A to the outside are shielded. A first cartridge 2A provided with a shutter 5 which can be opened and closed and a disc-shaped recording medium 1B are rotatably accommodated, and one opening 11 for exposing one side of the disc-shaped recording medium 1B to the outside is shielded. The second cartridge 2B provided with the shutter 12 that can be opened and closed has a cartridge holder 21 into which the second cartridge 2B can be selectively put in and taken out. In an information signal recording / reproducing apparatus for recording and reproducing an information signal with respect to the disc-shaped recording medium 1A or 1B, the first cartridge 2A inserted in the cartridge holder 21 Second cartridge 2B inserted into kicking one opening 3 or the cartridge holder 21
The support means 41 for supporting the external magnetic field generating means 23 in the direction of approaching and separating from the surface 13 where the opening 11 is not formed, and one opening of the first cartridge 2A inserted into the cartridge holder 21. 3, the detection means 50 for detecting 3 and the control means 47 for controlling the operation of the support means 41 based on the detection result from the detection means 50 are provided.

Specifically, the supporting means 41 has a first fulcrum 43 at a predetermined position, and is rotatable about a second fulcrum 42 at the rear end. The first arm 4 whose tip portion 41a is constantly urged toward the cartridge holder 21 by the urging means 42 and 46.
1 and the control means 47 is the first arm 41.
And is rotatable about a fulcrum 48, and when the detection means 50 contacts the surface 13 of the second cartridge 2B where the opening 11 is not formed,
The tip portion 41a of the first arm 41 is urged by the urging means 4
When the detection means 50 is pushed up against 6 and is inserted into one opening 3 of the first cartridge 2A, the second arm 47 is released to release the pushing up operation of the tip portion 41a of the first arm 41. Configure.

In addition to the above construction, when the first or second cartridge 2A or 2B is taken in or out of the cartridge holder 21, the second arm 47 of the detecting means is used.
Of the first or second cartridge 2A or 2B to the cartridge holder 21 by forcibly pushing up the front end portion of the first arm 41 of the first arm 41 of the supporting means in one direction. Upon completion of insertion, the second arm 4 by the pushing-up means 52.
7, and a restriction means 54 for restricting the pushing up of No. 7 is provided.

In this case, the pushing-up means 52 is rotatable about the fulcrum 53, and the third arm 52 is always biased by the biasing means 55 in the direction to push up the second arm 47. The restriction means 54
Is installed on the rear end side of the third arm 52, and the cartridge holder 2 of the first or second cartridge 2A or 2B.
When the insertion into 1 is completed, the convex portion 54 is configured to push up the rear end of the third arm 52 against the bias by the biasing means 55.

[0019]

In the information signal recording / reproducing apparatus according to the present invention,
First, the first cartridge 2A is attached to the cartridge holder 2
When it is inserted into 1, the known shutter opening / closing mechanism
The shutter 5 provided on both sides of the cartridge 2A is opened. When the insertion is completed, the two openings 3 and 4 provided on both surfaces of the cartridge 2A are exposed, so that one opening 3 is detected by the detection means 50. The detection result from the detection means 50 (in this case, the detection of the one opening 3) is transmitted to the control means 47, and the control means 4
7 operates the supporting means 41 in a direction in which the external magnetic field generating means 23 approaches the one opening 3. As a result, the supporting means 41 holds the external magnetic field generating means 23 at a position close to the disc-shaped recording medium 1A exposed from the one opening 3 by a predetermined distance, or directly contacts the disc-shaped recording medium 1A. .

That is, when the first cartridge 2A is inserted into the cartridge holder 21, first, the shutters 5 on both sides are opened so that the detecting means 50 enters the cartridge 2A through the one opening 3. As a result, the first arm 41 constituting the supporting means is released from being pushed up in one direction by the second arm 47, and is directed toward the one opening 3 side of the cartridge 2A around the first fulcrum 43. Rotate. The first arm 41 is
By the above rotation, the external magnetic field generating means 23 provided at the tip thereof is held at a position close to the disc-shaped recording medium 1A exposed from one opening 3 by a predetermined distance, or on the disc-shaped recording medium 1A. Direct contact.

On the other hand, when the second cartridge 2B is inserted into the cartridge holder 21, the shutter 12 provided on one side of the cartridge 2B is opened by the known shutter opening / closing mechanism. Simultaneously with the completion of insertion, one opening 11 provided on one surface of the cartridge 2B is exposed, but at a portion facing the external magnetic field generating means 23,
There is no opening, only the shielded surface 13 is present. Therefore, the opening is not detected by the detecting means 50. Then, the detection result from this detection means 50 (in this case, the opening is not detected) is transmitted to the control means 47, and the control means 47 directs the support means 41 to the surface 13 shielded by the external magnetic field generation means 23. It is operated so as to be separated from each other. As a result, the supporting means 41 is held at a position separated from the surface 13 that shields the external magnetic field generating means 23.

That is, when the second cartridge 2B is inserted into the cartridge holder 21, the shutter 12 on one side is opened first, but the surface 13 facing the external magnetic field generating means 23 remains shielded. Therefore, the detecting means 50 is in contact with the shielded surface 13. As a result, the first arm 41 constituting the supporting means is pushed up in one direction by the second arm 47, and the tip thereof, that is, the external magnetic field generating means 23, is moved to the cartridge 2B.
Is held at a position away from.

Next, when the first and second cartridges 2A and 2B are not inserted into the cartridge holder 21, or in the middle of the insertion, the restriction by the restriction means 54 acting on the pushing-up means 52 is released. The arm 47 of No. 2 is forced up. This second arm 47
Is pushed up, the tip end of the first arm 41 is pushed up in one direction, and the external magnetic field generating means 23 at the tip end is held at a position separated from the cartridge holder 21. That is, the first and second cartridges 2A and 2B are not inserted into the cartridge holder 21,
Alternatively, in the middle of the insertion, the rear end of the third arm 52 that constitutes the pushing-up means is separated from the convex portion 54 that constitutes the restricting means.
It is pushed up by the biasing means 55. by this,
External magnetic field generating means 23 at the tip of the first arm 41
Are pushed up in one direction and held at a position separated from the cartridge holder 21.

When the first or second cartridge 2A and 2B is inserted into the cartridge holder 21 and the insertion is completed, the rear end of the third arm 52 is pressed by the convex portion 54. , The third arm 52 rotates around the fulcrum 53 against the biasing means 55 to release the push-up to the second arm 47.

[0025]

EXAMPLES Examples of the information signal recording / reproducing apparatus according to the present invention (hereinafter referred to as recording / reproducing apparatus according to the examples) will be described below.
Will be described with reference to FIGS.

As shown in FIG. 5, the recording / reproducing apparatus according to this embodiment includes a first cartridge 2A in which a magneto-optical disk 1A capable of writing and reproducing an information signal is rotatably accommodated, and in FIG. As shown, the second cartridge 2B in which a read-only magneto-optical disk or optical disk (hereinafter, simply referred to as a read-only disk) 1B is rotatably accommodated is selectively used. The first and second cartridges 2A and 2B have the same size.

The first cartridge 2A shown in FIG. 5 has openings 3 and 4 on its front surface and back surface, respectively, and a shutter 5 for selectively opening and closing these openings 3 and 4 is slidably provided. Has been. A circular through hole 6 is provided in the center of the back surface side, and the magneto-optical disk 1 is passed through this through hole 6.
The center hub 7 of A is exposed to the outside. In addition, as shown in FIG. 6, the first cartridge 2A has a structure in which the side wall 8 has a mechanical strength higher than that of the side wall 8 in the opening 3 (and 4).
A thin portion 9 that is slightly thinner than the thickness of A is integrally provided. The thin portion 9 has a curvature along the diameter of the magneto-optical disk 1A.

On the other hand, the second cartridge 2B shown in FIG.
Has an opening 11 formed only on its back surface, and a shutter 12 for selectively opening and closing this opening 11 is slidably provided only on its back surface. Therefore, in the second cartridge 2B, the entire surface thereof is the synthetic resin plate 1
The shape is shielded by 3. Also in this cartridge 2B, a circular through hole 6 is provided in the center on the back surface side, and the center hub 7 of the read-only disc 1B is exposed to the outside through this through hole 6.

Then, each of the above cartridges 2A and 2B
As shown in FIG. 1, the recording / reproducing apparatus in which is mounted is a cartridge holder 21 into which the first and second cartridges 2A and 2B are selectively inserted, and a cartridge holder 21 into which the cartridge holder 21 is selectively inserted. A spindle motor 22 for holding the first or second cartridge 2A or 2B and rotating it in one direction, and a magnetic head 23 for applying an external magnetic field only to the first cartridge 2A,
Alternatively, the optical pickup 24 is configured to collect and irradiate the light flux on the second cartridge 2A or 2B.

The spindle motor 22 has its motor shaft 2
A circular turntable 26 with a magnet is fixed to the tip of the disk 5, and the turntable 26 is held by the center hub 7 of the magneto-optical disk 1A or the reproduction-only disk 1B in the first or second cartridge 2A or 2B. As a result, the magneto-optical disk 1A or the reproduction-only disk 1B is mounted on the spindle motor 22 (see FIG. 3).
And FIG. 4).

This spindle motor 22 is normally shown in FIG.
As shown in, the cartridge holder 21 is located below the cartridge holder 21. Then, when the first or second cartridge 2A or 2B is completely inserted into the cartridge holder 21, it is moved upward by the vertical slide mechanism 27.

The slide mechanism 27 is provided on the chassis substrate 2
A vertically extending guide pole 29 fixed to
The spindle member 22 is composed of a cylindrical portion 30 into which the guide pole 29 is inserted and a slide member 32 integrally formed with a supporting piece 31 extending in the horizontal direction on one side of the cylindrical portion 30. The portion is fixed to the lower surface of the support piece 31. Therefore, the cartridge 2A or 2B
At the same time as the mounting of the cartridge to the cartridge holder 21 is completed, the rotation drive of a known stepping motor (not shown) is transmitted through a known rotation-linear motion conversion mechanism (both not shown), so that the spindle motor 22 is supported by the support piece 31. At the same time, it moves upward along the guide pole 29.

Then, by the upward movement of the spindle motor 22, the turntable 26 enters the cartridge 2A or 2B through the through hole 6 in the first or second cartridge 2A or 2B, and at this time, is attracted by the magnet. The upper surface of the turntable 26 and the center hubs 7 of the magneto-optical disk 1A or the reproduction-only disk 1B in the cartridge 2A or 2B are held in close contact with each other, and the magneto-optical disk 1A in the first or second cartridge 2A or 2B is held. Alternatively, the read-only disc 1B is mounted on the spindle motor 22.

On the other hand, the cartridge holder 21 is formed in a box shape with a metal frame body, for example, and a space for accommodating the first and second cartridges 2A and 2B is formed therein. Further, the cartridge holder 21 is
A loading / unloading opening 33 for loading / unloading the cartridges 2A and 2B is provided on one end face, and a stopper piece 34 for positioning the inserted cartridge 2A or 2B at a predetermined position is provided on the other end portion by, for example, cutting and raising. It is formed integrally.

A support shaft 35 is integrally formed on both side walls near the stopper piece 34 side of the cartridge holder 21, and the support shaft 35 is integrally formed on the chassis substrate 28 by, for example, cutting and raising. Rising piece 3
6 is rotatably inserted in the through hole 37. Therefore,
The cartridge holder 21 rotates about the support shaft 35 and opens and closes with respect to the chassis substrate 28.

Further, as shown in FIG. 3, for example, when the first cartridge 2A is completely inserted into the upper surface of the cartridge holder 21, it faces the opening 3 on the front surface side of the cartridge 2A. An opening 38 having substantially the same size as the opening 3 is formed at the position (see FIG. 2). Therefore, when the first cartridge 2A is inserted into the cartridge holder 21, the cartridge 2 is passed through the opening 38 of the cartridge holder 21.
The magneto-optical disk 1A in A faces upward.

The optical pickup 24 is a cartridge 2A or 2B inserted in the cartridge holder 21.
In the radial direction of the magneto-optical disk 1A or the reproduction-only disk 1B (in the drawing, the direction perpendicular to the paper surface),
For example, a base 3 that can be moved by a known linear motor
It is fixed on 9. The base 39 is integrally formed with an interlocking arm 40 extending upward near the outside of the cartridge holder 21.

A support arm 41 is rotatably attached to the upper end of the interlocking arm 40 via a support shaft 42. The support arm 41 is formed of synthetic resin in a substantially rectangular shape, and the longitudinal direction thereof is the cartridge holder 2.
A magnetic head 23 is attached to the lower surface of the tip of the magnetic head 23. In addition, this support arm 4
A hinge 43 formed of a V-shaped groove is formed slightly closer to the tip than the center of the longitudinal direction 1 of FIG. As shown in FIG. 2, a coil spring 44 is attached to the support shaft 42, and the tip end of the support arm 41 is biased toward the cartridge holder 21 side by the coil spring 44.

A plate spring 45 made of metal is attached to the upper surface of the support arm 41 along the longitudinal direction of the support arm 41. A coil spring 46 is interposed between the coil spring 46 and the portion slightly near the tip. Therefore,
The support arm 41 is wholly urged downward by the coil spring 44 attached to the support shaft 42 about the support shaft 42, and is further interposed between the leaf spring 45 and the support arm 41. By 46, the tip portion of the hinge 43 is biased downward.

The magnetic head 23 is located on the opening 38 of the cartridge holder 21 and on the cartridge holder 21.
The cartridge 2A or 2B inserted in the cartridge is positioned at a position including a direction perpendicular to the paper surface in the drawing, with the center of the disk 1A or 1B housed therein as a base point.

In this embodiment, the operation arm 47 is fixed to the upper surface of the cartridge holder 21 below the support arm 41. This operation arm 47
Is formed of synthetic resin and, as shown in FIG. 2, is formed in a strip shape having the width direction of the cartridge holder 21 as the longitudinal direction. A hinge 48 formed by a V-shaped groove is formed at the rear portion. In addition, this operation arm 4
7, a prismatic regulating member 49 for regulating the downward rotation of the support arm 41 and for positioning the support arm 41 at a predetermined separation width with respect to the cartridge holder 21 is fixed to the upper surface on the rear end side of the hinge 48. Has been done.

That is, the support arm 41 is urged to rotate toward the cartridge holder 21 side by the coil spring 44 attached to the support shaft 42, but the rotation thereof is caused by the regulating member 49 on the operation arm 47. Is regulated, and the rear end side of the hinge 43 is positioned so as to be substantially parallel to the upper surface of the cartridge holder 21.

The top end portion 41a of the support arm 41 relative to the hinge 43 is vertically displaced by a coil spring 46 provided between the leaf spring 45 and the support arm 41. For example, as shown in FIG. 3, the first cartridge 2A is inserted into the cartridge holder 21,
Further, when the cartridge holder 21 is maintained in parallel with the chassis substrate 28, the magnetic head 23 attached to the lower surface of the tip of the tip portion 41a of the support arm 41 has the magneto-optical disk in the first cartridge 2A. It is positioned at a position close to or in contact with 1A by the biasing force of the coil spring 46.

In particular, the magnetic head 23 is the magneto-optical disk 1.
When the magnetic head 23 is positioned at a position where it comes into contact with A, the spring constants of the leaf spring 45 and the coil spring 46 are set so that the magnetic head 23 comes into contact with the magneto-optical disk 1A with a predetermined pressing force (for example, 3 gf). Selected. That is, the tip end portion 41a of the support arm 41 is more than the hinge 43 of the support arm 41.
It constitutes a gimbal arm of the magnetic head 23. Therefore,
Hereinafter, this tip portion 41a will be referred to as a gimbal arm.

A projection 50 for detecting the opening 3 of the first cartridge 2A is provided on the lower surface of the operation arm 47. In this embodiment, the opening 3 of the cartridge holder 21 is provided in the lower surface of the operation arm 47.
The cartridge holder 21 is provided at a position facing the side surface side of the cartridge holder 21. Specifically, as shown in FIG. 3, when the first cartridge 2A is inserted into the cartridge holder 21, the cartridge holder 21
And the thin portion 9 of the first cartridge 2A facing upward through the openings 38 and 3 of the first cartridge 2A, in particular, at a position facing the wide portion (see FIG. 2). Also, on the side surface of the operation arm 47,
A projecting piece 51 that projects laterally from the side surface of the cartridge holder 21 is integrally formed.

On the other hand, an L-shaped arm 52 made of synthetic resin or metal is attached to the side surface of the cartridge holder 21 so as to be rotatable around a support shaft 53. The support shaft 53 is provided on the cartridge holder 21, and is inserted into a hole provided at substantially the center of one tongue piece 52 a of the L-shaped arm 52 to thereby set the rotation fulcrum of the L-shaped arm 52. Constitute.

Of the L-shaped arm 52, the other tongue piece 52b is formed to be shorter than the one tongue piece 52a, and its end portion is bent in the horizontal direction. This end portion is formed by cutting and raising the chassis substrate 28, and the protruding piece 54 protruding upward from the chassis substrate 28.
Is selectively pressed upward by.
In addition, the L-shaped arm 52 and the cartridge holder 21
A tension spring 55 is attached between them. In the illustrated example, the tension spring 55 is provided in the vicinity of the bent portion of the L-shaped arm 52 and in the lower portion of the side surface of the cartridge holder 21.
The support shaft 53 is attached between the support shaft 53 and a portion located substantially vertically below.

The L-shaped arm 52 includes the cartridge holder 21 and the chassis substrate 28 as shown in FIG.
When it is in a state (closed state) almost parallel to the upper surface of the
Presses the other tongue piece 52b of the L-shaped arm 52 upward, so that the support shaft 53 is resisted against the bias of the tension spring 55.
Rotate counterclockwise around the tongue piece 5
The longitudinal side surface of 2a and the upper surface of the cartridge holder 21 are positioned so as to substantially coincide with each other. At this time, the side surface of the tip end portion of one tongue piece 52a of the L-shaped arm 52 and the lower surface of the projecting piece 51 of the operation arm 47 are brought into contact with each other or not, and the operation arm 47 is almost urged by its own weight. The upper surface of the cartridge holder 21 is in contact with it.

On the other hand, as shown in FIG. 1, when the cartridge holder 21 is positioned obliquely with respect to the chassis substrate 28 at an angle (open state), the other tongue piece of the L-shaped arm 52 is formed. The end of 52b is the protrusion 54
In order to separate the L-shaped arm 52 from the support arm 47, the L-shaped arm 52 is rotated clockwise in the drawing around the support shaft 53 by the biasing force of the tension spring 55, and the protrusion of the support arm 47 is attached to the tip side of the one tongue piece 52a. Press 51 upwards. Therefore, the operation arm 47 is centered on the hinge 48 by the above-mentioned pressing, and in the drawing,
Gimbal arm 41a that rotates clockwise and exists above
Press upward. As a result, the gimbal arm 41a
Around the hinge 43 against the bias of the coil spring 46,
In the drawing, the magnetic head 23 rotates clockwise and is fixed at a position where the end portion of the magnetic head 23 substantially coincides with the upper surface position of the cartridge holder 21.

Next, the loading operation of the recording / reproducing apparatus according to this embodiment, that is, the magneto-optical disk 1A in the first cartridge 2A or the reproduction-only cartridge 1B in the second cartridge 2B is the turntable of the spindle motor 22. 1 to FIG.
And it demonstrates based on FIG.

First, by operating the eject key on the operation panel (not shown) of the recording / reproducing apparatus, as shown in FIG.
As shown in, the cartridge holder 21 rotates about the support shaft 35, is held obliquely with respect to the chassis substrate 28 at an angle, and is in an open state. At this time, the end portion of the other tongue piece 52b of the L-shaped arm 52 separates from the projecting piece 54, so that the L-shaped arm 52 is rotated about the support shaft 53 by the urging force of the tension spring 55, and the tip portion of the operation arm 47 is rotated. Lift up.

When the operating arm 47 is lifted up, the tip portion of the support arm 41 located above the operating arm 47, that is, the gimbal arm 41a is also lifted up. As a result, the tip of the magnetic head 23 attached to the lower surface of the tip of the gimbal arm 41 a is fixed at a position where the magnetic head 23 substantially coincides with the upper surface of the cartridge holder 21.

From the above state, the first cartridge 2A or the second cartridge 2 is placed in the cartridge holder 21.
B will be inserted in the direction of arrow a.

Here, for example, when the first cartridge 2A is inserted into the cartridge holder 21, as shown in FIG. 3, first, it is provided on both sides of the first cartridge 2A by a known shutter opening / closing mechanism (not shown). The shutter 5 is opened. Then, at the same time when the insertion into the cartridge holder 21 is completed, the first cartridge 2A
The two openings 3 and 4 (both of which are not shown in FIG. 3; see FIG. 5A) provided on both surfaces of the are exposed.

From this stage, the cartridge holder 21 is rotated about the support shaft 35, and the cartridge holder 21 is rotated.
Is almost parallel to the upper surface of the chassis substrate 28 and is in a closed state, the protrusion 54 of the chassis substrate 28 continues to press the end portion of the L-shaped arm 52 upward in the process. The L-shaped arm 52 rotates about the support shaft 53 by this pressing.
By the rotation of the L-shaped arm 52, the operation arm 47
When the upward lifting is gradually released and the cartridge holder 21 is completely closed, the upward pressing of the operation arm 47 is completely eliminated.

Therefore, the operation arm 47 is in a state of being almost in contact with the upper surface of the cartridge holder 21 by its own weight, and at the same time, the protrusion 50 of this arm 47 enters the cartridge 2A through the opening 3 of the first cartridge 2A, It abuts on the thin portion 9 of the cartridge 2A, particularly on the wide portion thereof. Further, as the pressing on the operation arm 47 is released, the upward pressing on the gimbal arm 41a is gradually released, and the cartridge holder 2 is released.
When 1 is completely closed, gimbal arm 41a
Is substantially horizontal due to the bias of the coil spring 46.

At this time, the magnetic head 23 attached to the lower surface of the tip of the gimbal arm 41a enters the cartridge 2A through the opening 38 of the cartridge holder 21 and the opening 3 of the first cartridge 2A, and the internal magneto-optical The disc 1A is fixed at a position separated by a predetermined distance.

Further, when the cartridge holder 21 is completely closed, the vertical slide mechanism 32 of the spindle motor 22 operates to move the spindle motor 22 upward, that is, toward the cartridge holder 21. By this upward movement, the turntable 26 enters the cartridge 2A through the opening 6 on the back surface of the first cartridge 2A and stops its movement at a predetermined position.

At this time, the magneto-optical disk 1A is slightly lifted by the upward movement of the turntable 26, and at the same time, the center hub 7 of the magneto-optical disk 1A is attracted by the magnet of the turntable 26 and the center hub 7 and The turntable 26 and the turntable 26 are in close contact with each other and held. The slight lifting of the magneto-optical disk 1A brings the magnetic head 23 to a position close to or in contact with the magneto-optical disk 1A.

From this state, it is possible to record and reproduce information signals with respect to the magneto-optical disk 1A. That is, by operating, for example, a reproduction key on an operation panel (not shown), the spindle motor 22 is rotationally driven to rotate the magneto-optical disk 1A in the cartridge 2A in one direction. Then, by moving the base 39 in the radial direction of the magneto-optical disk 1A by a known linear motor, the optical pickup 24 and the magnetic head 23 are moved to each other.
The optical pickup 24 is moved in the radial direction of the magneto-optical disk 1A in a mutually facing positional relationship with A in between.
It becomes possible to reproduce the information signal.

By operating, for example, a recording key on the operation panel, an external magnetic field is generated from the magnetic head 23 based on the information signal, and the optical pickup 24 and the magnetic head 23 transmit the information signal to the magneto-optical disk 1A. It is possible to record.

On the other hand, when the second cartridge 2B is inserted into the cartridge holder 21, first, as shown in FIG. 4, the second shutter 2B is opened by a known shutter opening / closing mechanism (not shown).
Back of the cartridge 2B (on the side of the optical pickup 24)
The shutter 12 provided in the is opened. Then, at the same time when the insertion into the cartridge holder 21 is completed, one opening 1 provided on the back surface of the second cartridge 2B
1 (the opening 11 is not shown in FIG. 4; see FIG. 7A).

From this stage, the cartridge holder 21 is rotated about the support shaft 35, and the cartridge holder 21 is rotated.
Is substantially parallel to the upper surface of the chassis substrate 28 and is in a closed state, the upward pressing of the operation arm 47 by the L-shaped arm 52 is completely eliminated, and the tip of the operation arm 47 is hinged by its own weight. Although it will rotate downward about 48, there is no opening on the surface side of the second cartridge 2B, that is, the side facing the magnetic head 23, and the entire surface is shielded by the synthetic resin plate 13. Therefore, the projection 50 of the operation arm 47 comes into contact with the surface of the cartridge 2B, and further downward rotational movement is restricted.

Therefore, the operating arm 47 holds the state when the cartridge holder 21 is in the open state, that is, the state in which it is obliquely positioned at a certain angle with respect to the upper surface of the cartridge holder 21, and is positioned above it. The gimbal arm 41a maintains a state of being lifted upward at the tip of the operation arm 47.

As a result, inconvenience such as collision of the magnetic head 23 with the second cartridge 2B is eliminated, and the second
Of the cartridge 2B and the magnetic head 23, and a mechanism for moving the magnetic head 23 in a direction of approaching and separating from the cartridge 2A or 2B (support arm 41).
It is possible to prevent damage such as) in advance.

Further, a hinge 43 is provided on a support arm 41 for supporting the magnetic head 23, the opening 3 of the cartridge 2A is detected below the support arm 41, and when the opening 3 is present, the hinge 3 is rotated downward. A moving operation arm 47 is provided, and when the cartridge holder 21 is in the open state, the operation arm 47 is forcibly lifted L
Since only the V-shaped arm 52 is provided, the structure is very simple, and no extra installation space for arranging this mechanism is required.

Whether the cartridge inserted in the cartridge holder 21 is the first cartridge 2A,
Or, whether it is the second cartridge 2B, the operation arm 4
Since it is performed by directly detecting the presence or absence of the opening 3 at 7, it is not necessary to provide a notch or groove for discrimination in the first and second cartridges 2A and 2B themselves, and the cartridges 2A and 2B are eliminated. However, even if there is a restriction on the standard, the first cartridge 2A and the second cartridge 2B can be easily and reliably distinguished from each other.

[0068]

As described above, according to the information signal recording / reproducing apparatus of the present invention, one opening of the first cartridge inserted into the cartridge holder or the second opening inserted into the cartridge holder. Supporting means for supporting the external magnetic field generating means in a direction of approaching and separating from the surface of the cartridge where the opening is not formed, and detection for detecting one opening of the first cartridge inserted in the cartridge holder. Since the means and the control means for controlling the operation of the supporting means based on the detection result from the detecting means are provided,
It is possible to easily discriminate between a cartridge containing a writable magneto-optical disc and a cartridge containing a read-only disc without providing a notch or groove in the cartridge, and simplifying the structure of the discriminating mechanism. Also, the installation space for the mechanism can be reduced.

[Brief description of drawings]

FIG. 1 is a partially broken view of an embodiment of an information signal recording / reproducing apparatus according to the present invention (hereinafter referred to as a recording / reproducing apparatus according to the embodiment), particularly when a cartridge holder is opened with respect to a chassis substrate. FIG.

FIG. 2 is a perspective view of a main part of the recording / reproducing apparatus according to the present embodiment, particularly showing a state where the cartridge holder is opened with respect to the chassis substrate.

FIG. 3 is a side view showing a partially broken state of the recording / reproducing apparatus according to the present embodiment, particularly a state in which the first cartridge is mounted in the cartridge holder.

FIG. 4 is a side view showing a partially broken state of the recording / reproducing apparatus according to the present embodiment, particularly a state in which the second cartridge is mounted in the cartridge holder.

FIG. 5 shows a first used in the recording / reproducing apparatus in the example.
2A is a perspective view showing the cartridge of FIG. 1A, and FIG. 1A shows a state viewed from the front side thereof, and FIG.

FIG. 6 shows a first used in the recording / reproducing apparatus in the example.
FIG. 6 is a perspective view showing the cartridge of FIG.

FIG. 7 is a second diagram used in the recording / reproducing apparatus in the example.
2A is a perspective view showing the cartridge of FIG. 1A, and FIG. 1A shows a state viewed from the front side thereof, and FIG.

[Explanation of symbols]

 1A Magneto-optical disc 1B Reproduction-only disc 2A First cartridge 2B Second cartridge 3 One opening 4 Other opening 5,12 Shutter 6 Through hole 7 Center hub 9 Thin portion 11 Opening 21 Cartridge holder 22 Spindle Motor 24 Optical pickup 26 Turntable 28 Chassis substrate 35,42 Spindle 39 Base 40 Interlocking arm 41 Support arm 41a Gimbal arm 43,48 Hinge 44,46 Coil spring 47 Operation arm 50 Projection 52 L-shaped arm 54 Projection piece 55 Tension spring

Claims (4)

[Claims] 1. A disk-shaped recording medium is rotatably accommodated,
A first shutter is provided which is openable and closable and which shields two openings for exposing both sides of the disk-shaped recording medium to the outside.
The cartridge and the disk-shaped recording medium are rotatably accommodated, and one surface of the disk-shaped recording medium is exposed to the outside 1
A second cartridge provided with a shutter that opens and closes one opening is openable and closable and has a cartridge holder that can be selectively taken in and out. In an information signal recording / reproducing apparatus for recording / reproducing an information signal on / from a disc-shaped recording medium, one opening of a first cartridge inserted in the cartridge holder or a second cartridge inserted in the cartridge holder. A support means for supporting the external magnetic field generating means in a direction in which the external magnetic field generating means is moved toward and away from the surface of the first cartridge inserted into the cartridge holder. The operation of the support means is controlled based on the detection means and the detection result from the detection means. Information signal recording and reproducing apparatus characterized by having a that control means. 2. The support means has a first fulcrum at a predetermined position and is rotatable about a second fulcrum at the rear end, and a portion of the tip from the first fulcrum is a biasing means. Is constituted by a first arm that is constantly biased toward the cartridge holder, the control means is arranged below the first arm, and is rotatable about a fulcrum. When the detecting means comes into contact with the surface of the second cartridge in which the opening is not formed, the tip end portion of the first arm is pushed up against the biasing means, and the detecting means causes the first cartridge to move. When inserted into one opening of the cartridge, the first
2. The information signal recording / reproducing apparatus according to claim 1, wherein the information signal recording / reproducing apparatus comprises a second arm that releases the pushing up of the tip portion of the arm. 3. When the first or second cartridge is loaded into or unloaded from the cartridge holder, the second of the detection means is used.
Push-up means for forcibly pushing up the tip end portion of the arm of the first arm to push up the tip end portion of the first arm in the supporting means in one direction, and when the insertion of the first or second cartridge into the cartridge holder is completed, 3. The information signal recording / reproducing apparatus according to claim 2, further comprising: restriction means for restricting the pushing up of the second arm by the pushing up means. 4. The pushing-up means is configured to be rotatable about a fulcrum, and is constituted by a third arm which is always biased by a biasing means in a direction to push up the second arm. The regulating means is installed on the rear end side of the third arm, and when the insertion of the first or second cartridge into the cartridge holder is completed, the regulating means resists the urging by the urging means. 4. The information signal recording / reproducing apparatus according to claim 3, wherein the information signal recording / reproducing apparatus comprises a convex portion that pushes up a rear end of the rear portion.