JPH05159438A - Recording and reproducing device, spindle motor and magnetic head driving mechanism - Google Patents

Abstract

PURPOSE:To record and reproduce both optical disk and magnetic disk by one recording and reproducing device by providing an optical head for an optical recording medium and a magnetic head for a magnetic recording medium. CONSTITUTION:When a cartridge housed with the optical recording medium is inserted into a prescribed position, an upper part of a cartridge holder 128 is abutted on a switch 134 to be turned on, so that the recording medium is discriminated as the optical recording medium. Consequently, a laser beam from a laser oscillator is formed into a spot on the optical recording medium by a movable head assembly 108. On the other hand, when a cartridge housed with a flexible disk is inserted into a prescribed position, because of this cartridge being thin, the switch 134 cannot be turned on so that the medium is discriminated as the flexible disk. By this method, the magnetic heads 115 and 116 are moved and positioned, and hence information is recorded and reproduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk device,
More specifically, the present invention relates to a recording / reproducing apparatus aimed at recording / reproducing information on / from both an optical recording medium or a magnetic recording medium formed in a disc shape. Further, the present invention relates to a spindle motor and a magnetic head drive mechanism used in such a recording / reproducing apparatus.

[0002]

2. Description of the Related Art Conventionally, recording and reproducing devices called FDD (flexible disk driving device), ODD (optical disk driving device), HDD (hard disk driving device) and the like have different recording systems and recording and reproducing media. When the disk drive devices have independent disk drive systems, and such a disk drive device is attached to a personal computer, for example, these drive systems are usually stored independently in the disk drive device housing space of the personal computer. It was

Although there are some external recording / reproducing devices for the personal computer which are stored in the same frame, the internal disk drive system is completely independent.

[0004]

[Problems to be Solved by the Invention] Conventional FDD and OD
Disk drive devices called D, HDD, and the like have independent disk drive systems, resulting in an increase in size and cost of the device. Especially in recent years,
Portable computers called laptops, notebooks, palmtops, etc. have come into widespread use, and accordingly, disk drive devices have also been required to be smaller and lighter. For this reason,
For example, when both the FDD and the ODD are mounted on a portable computer, there is a problem that space is restricted and one of them cannot be mounted.

FDD and ODD have the interchangeability that the recording / reproducing medium can be exchanged, and have been widely used as an external storage device such as a personal computer in recent years. FDD has a small recording capacity, but recording / reproducing is performed. The medium has a low cost, and ODD has a feature that the recording capacity is large but the cost of the recording / reproducing medium is high. Therefore,
It has been conventionally practiced to selectively use the FDD and the ODD according to the purpose of use, but it has been extremely difficult to have these independent disk drive devices at the same time due to the size reduction of the personal computer due to space restrictions.

[0006]

As a means for solving the conventional technique, most of the conventional recording / reproducing devices called FDD, ODD, HDD, etc. are shared to improve space efficiency.

Specifically, a movable head for irradiating a recording area of an optical recording medium with laser light emitted from a laser oscillator, actuator means for moving and positioning the movable head, and a magnetic disk such as a flexible disk. A magnetic head for recording / reproducing on / from a recording medium and an actuator means for moving and positioning the magnetic head are provided.

Further, for loading and unloading the optical recording medium or the magnetic recording medium such as a flexible disk stored in the cartridge to a predetermined position, and opening and closing the shutter provided in the cartridge. And a spindle motor for rotatably supporting the disk.

Further, the recording medium stored in the cartridge is provided with a discriminating means for discriminating between an optical recording medium and a magnetic recording medium. The determination of the recording medium is provided with a detection means for detecting the shape of a cartridge storing the magnetic recording medium such as the optical recording medium or a flexible disk, and the loading means has a switch for detecting the thickness of the cartridge. And detecting the thickness of the cartridge by turning the switch on and off,
Alternatively, after the recording / reproducing medium is loaded, the recording / reproducing medium is irradiated with a laser beam emitted from the laser oscillator, and the type of the recording / reproducing medium is determined based on the presence / absence of reflected light of the laser beam.

Further, the loading means comprises a cartridge holder, at least one preload spring provided in the cartridge holder, a slide plate, and a coil spring provided in the slide plate. Further, the shutter opening / closing means is formed of a swing arm, a pin arranged in a part of the swing arm, and a spring for returning the swing arm to an initial position.

In the spindle motor used in the recording / reproducing apparatus as described above, the rotor is provided with a magnet for generating the magnetic attraction force in order to clamp the disk having the hub attached thereto by the magnetic attraction force. A spindle motor for concentrically positioning the disc and the rotor by a shaft, wherein the disc suction portion of the rotor has a concave cross section, and when the hub of the disc is smaller than the inner diameter of the concave cross section, the hub is It is clamped so as to be fitted to the rotor, and when the hub is larger than the inner diameter of the concave cross section, the hub is abutted on the upper end portion of the rotor and clamped. Further, the rotor is characterized by having at least one drive pin having a restoring force capable of moving in the axial direction. Further, the magnet and the disc attracting portion are set so that the clamping force when the hub is clamped so as to be fitted to the rotor is larger than the clamping force when the hub is abutted and clamped on the upper end portion of the rotor. It is characterized by being formed.

In a magnetic head drive mechanism used in such a recording / reproducing apparatus, a magnetic head for recording / reproducing information, a suspension for supporting the magnetic head, and a carriage for supporting the suspension, In a magnetic head drive mechanism having an actuator means for moving and positioning the magnetic head to an arbitrary track of a recording / reproducing medium, a cam member is attached to a part of the suspension so that the magnetic head is moved to the recording / reproducing medium. It is characterized by raising and lowering. Further, the cam is formed integrally with the suspension. Further, in the actuator means for converting the rotational displacement of the rotary motor into a linear displacement by a lead screw, the lead screw has at least one turning point. Further, a loader shaft for operating the cam means is provided.

[0013]

【Example】

(First Embodiment) A first embodiment of the present invention will be described below with reference to the drawings. 1 is an exploded perspective view of a main part of a recording / reproducing apparatus according to a first embodiment of the present invention, and FIG. 2 is a partial sectional side view of the recording / reproducing apparatus according to the first embodiment of the present invention.

A spindle motor 102 for clamping the recording / reproducing medium and rotatably supporting the recording / reproducing medium is fixed to the base frame 101 integrally with the base frame 101.

A loading mechanism for loading the recording / reproducing medium onto the spindle motor 102 positions the cartridge 129 in which the recording / reproducing medium is stored, and also the shutter 1 provided in the cartridge.
A cartridge holder assembly 103 for opening and closing 39, and a slide plate 104 and a slide plate 104 for causing the spindle motor 102 to clamp the recording / reproducing medium stored in the cartridge by moving the cartridge holder assembly 103 up and down. Slide springs 105, 1 for
06, a stopper assembly 107 for holding the slide plate 104 at a predetermined position when the cartridge is not in the recording / reproducing apparatus.

The movable head assembly 108 includes guide rails 109 arranged in the radial direction of the recording / reproducing medium.
It is slidably fitted to 110 via a bearing (not shown).

Outside the movable head assembly 108, a magnet 11 supported by yokes 111 and 112 is provided.
3, 114 are opposed to each other with an appropriate air gap and form a magnetic field within the movable range of the movable head assembly 108.

Since the movable head assembly 108 is provided with a coil (not shown), when an electric current is applied to the coil, an electromagnetic force acts, and the movable head assembly 108 is guided to the guide rail 10 by attraction and repulsion with the magnetic field.
It is possible to move along 9,110.

The magnetic heads 115 and 116 are attached to the carriage 117 via suspensions 118 and 119. The carriage 117 is slidably fitted to a guide rail 120 arranged in the radial direction of the recording / reproducing medium via a bearing (not shown). The guide rail 120 is fixed to ribs 121 and 122 provided on the base frame 101.

A lead screw 124 of the stepping motor assembly 123 is provided on a part of the carriage 117.
The pin 125 is arranged so as to fit in the groove 124a of the lead screw 1.
It is pressed against 24. Meanwhile, the lead screw 12
4 is rotatably supported by a concave plate 126 fixed to the base frame 101 and connected to a rotor (not shown) of the stepping motor 127, so that the stepping motor 127 of the stepping motor assembly 123 is driven. As a result, the carriage 117 can be moved along the guide rail 120.

In the recording / reproducing apparatus configured as described above, when the cartridge 129 containing the recording / reproducing medium is inserted from the opening 128a of the cartridge holder 128, the guide 128 integral with the cartridge holder 128.
The cartridge 129 can be pushed further by being guided by b and 128c. The cartridge holder 128 is preloaded to eliminate backlash,
Leaf springs 130, 131, and 1 for adjusting the position of the recording / reproducing medium even when cartridges having different thicknesses are inserted.
32 and 133 are provided on the cartridge holder 128 by spot welding. The cartridge 129 can be pushed in until it comes into contact with the stop portions 128d and 128e. Stop portion 12 of the cartridge holder 128
A switch 134 for detecting the thickness of the cartridge 129 is provided between 8d and 128e, and is turned on / off according to the thickness of the cartridge.

One end 135a of the V-shaped shutter opening / closing arm 135 is rotatably fitted to a pivot pin 136 provided on the cartridge holder 128. The other end 135b of the V-shaped shutter opening / closing arm 135 is provided with the gap 12 of the cutout portion 128f of the cartridge holder 128.
The shutter opening / closing pin 137 is provided while being fitted in 8 g. The torsion coil spring 138 is for returning the shutter opening / closing arm to a predetermined position, and the coil portion 138 a of the torsion coil spring 138 has a pivot pin 13 a.
6 and the cartridge holder 12
8 cut-and-raised portion 128h, shutter opening / closing arm 135
Is engaged with the cut and raised portion 135c.

Since the notch 129a for opening / closing the shutter 139 is formed in the cartridge, the shutter opening / closing pin 13 is inserted when the cartridge 129 is inserted.
7 enters the notch 129a, and the shutter 139
Can be pushed open. When the cartridge is inserted to a predetermined position, the stopper assembly 107 that fixes the slide plate 104 provided on the base frame 101 is released. As a result, the slide plate 104 is pulled by the slide springs 105 and 106 and moves in a direction parallel to the guide rails 109 and 110. In the long hole 104a of the slide plate 104, a pin 140 made of synthetic resin having a head diameter larger than the width of the long hole,
Since 141 is fixed to the base frame 101 via the slide plate 104, the slide plate does not float above and the guide rails 109, 11
It is possible to perform a stable operation in the direction parallel to 0. The pins 140 and 141 and the elongated hole 104a are similarly arranged in a portion which is symmetrical with respect to the radial center axis of the spindle motor 102 (not shown).

Positioning pins 142, 143, 144, and 145 are provided on the side surfaces of the cartridge holder, and the holes 10 are formed on the side surfaces of the slide plate 104.
4b, 104c, 104d and 104e are fitted.
The guide pins 146 and 147 are provided on the base frame 101.
The guide grooves 101a and 101b are integrally formed with each other. Therefore, the cartridge holder assembly 103 can perform up-down as the slide plate 104 slides.

When ejecting the cartridge 129, the slide plate may be locked by pressing the button 148 provided on the slide plate 104 to push in the slide plate.

The recording / reproducing operation after the cartridge containing the recording medium is loaded will be described below with reference to FIGS. 3 and 4. FIG. 3 is a sectional view of a main part showing a state in which a cartridge storing an optical recording / reproducing medium is loaded in the recording / reproducing apparatus according to the first embodiment of the present invention, and FIG. 4 is flexible to the recording / reproducing apparatus according to the first embodiment of the present invention. FIG. 3 is a cross-sectional view of a main part showing a state in which a cartridge storing a disk is loaded.

In FIG. 3, when the cartridge 152 in which the optical recording / reproducing medium 151 is stored is inserted into the cartridge holder assembly 103 at a predetermined position and loaded, a positioning pin (not shown) for determining the position in the height direction. The cartridge 152 is positioned,
Leaf spring 1 provided in the cartridge holder assembly
The bending of 30, 131, 132, and 133 causes the upper portion of the cartridge holder 128 to come into contact with the switch 134, turning on the switch 134. This identifies that the recording / reproducing medium is an optical recording / reproducing medium.

If such a switch 134 is provided, the space efficiency will be deteriorated and the cost will be increased. Therefore, without providing the switch 134, the movable head assembly 108 is driven and the laser beam is emitted from the laser oscillator 153. The recording / reproducing medium may be discriminated by the presence / absence of reflected light of the emitted laser light.

The optical recording / reproducing medium 151 is clamped by the spindle motor 102 and rotated at about 3600 rpm. On the other hand, a laser beam 155 emitted from the laser oscillator 153 is reflected by a prism 156 provided in the movable head assembly 108 and changed in direction, and then is condensed by an objective lens 157 to be a laser beam 158 as an optical recording / reproducing medium 151. To form a spot. By moving the movable head assembly 108, the spot is moved and positioned to record and reproduce information. The recording / reproducing method may be either a phase change method or a magnetic field modulation method. In the case of the magnetic field modulation method, an electromagnet 159 for generating a magnetic field is arranged on the upper surface of the cartridge holder assembly 103.

When the optical recording / reproducing medium 151 is loaded, the magnetic heads 115 and 116 and the suspensions 118 and 119 interfere with the cartridge holder assembly 103. Therefore, the carriage 117 is moved by driving the stepping motor 127. , Magnetic heads 115, 116 and suspensions 118, 11
9 is retracted to the outside of the cartridge 152.

During the retract, the magnetic head 115,
Suspension 1 so that 116 do not touch each other
A loader shaft 154 is interposed between the parts 18 and 119.

In FIG. 4, the flexible disk 16
When the cartridge 160 storing 1 is inserted into a predetermined position of the cartridge holder assembly 103 and loaded, the cartridge 160 is positioned by a positioning pin (not shown) for determining the position in the height direction. Since the cartridge 160 storing the flexible disk 161 is thinner than the cartridge 152 storing the optical recording medium, the leaf springs 130, 131, 132 included in the cartridge holder assembly 103,
It is pushed down by 133 and a gap 162 is formed between it and the cartridge holder 128.
4 cannot contact the cartridge 160, and the switch 134
Cannot be turned on. Therefore, the switch 134 is turned off, and it is identified that the inserted recording / reproducing medium is the flexible disk 161. The flexible disk 161 is clamped by the spindle motor 102 and rotates at about 500 rpm.

In this state, the retracted magnetic heads 115 and 116 are replaced with the flexible disk 161.
Stepping motor 1 loaded in the data area of
Information is recorded / reproduced by driving and positioning the magnetic heads 115 and 116 by driving 27. At this time, the movable head assembly 108 is retracted to the inner peripheral side of the flexible disk 161.

The recording / reproducing apparatus of the first embodiment aims to integrate the conventional ODD and FDD.
Loading means, cartridge shutter opening / closing means,
The spindle motor and base frame are used in common. In particular, in Example 1, the recording / reproducing apparatus was formed so that the total thickness was 1 inch or less, with the aim of recording / reproducing information on / from a 3.5-inch size recording / reproducing medium.

Further, the magnetic head of the present invention and the actuator means for driving the magnetic head are not limited to the flexible disk, but can be applied to a recording / reproducing medium replaceable HDD.

(Embodiment 2) FIG. 5 is a plan view of a magnetic head drive mechanism in Embodiment 2 of the present invention, and FIG. 6 is a line A- in FIG.
FIG.

Suspension 2 having a rectangular planar shape
Magnetic heads 201 and 202 are provided at one ends of 03 and 204 so as to oppose the flexible disk 206, and the other ends are fixed to the carriage 205.

The suspension 203 has a bent portion 2
03a and 203b are formed to increase the bending rigidity in the direction perpendicular to the bending direction. That is, the suspension 203 has an elastically deformable portion 203c with low bending rigidity.
The elastically deformable portion 203c is deformable when some external force acts on the suspension. Further, the suspension 203 is integrally formed with a protruding portion 203d having a cam curve. The protruding portion 203d having the cam curve may be formed of synthetic resin or the like and fixed to the suspensions 203 and 204 with an adhesive or the like. A part of the suspension 203 is formed in the hole 20 of the carriage 205.
5a and 205b are fitted and further crimped.

The suspensions 203 and 204 and the magnetic heads 201 and 202 have a center line B--
Since they are symmetrically and equally arranged with respect to B, their construction and mounting structure are identical. A loader shaft 212 made of synthetic resin is provided between the suspensions 203 and 204.

A bearing 208 is provided on a part of the carriage 205, and the bearing 208 is slidably fitted on the guide rail 209. That is, the carriage 205 can move on one axis parallel to the surface of the flexible disk 206.

The other part of the carriage 205 is provided with a pin 211 for transmitting the rotational displacement of the lead screw 210 as a linear displacement of the carriage 205, which is pressed against the lead screw 210 by an appropriate preload. There is.

Both ends of the lead screw 210 are rotatably supported by the frame 214, and are integrated with a rotor (not shown) of the stepping motor 213.

Further, the lead angle θ of the lead screw 210
1 and θ2 have a relation of θ1> θ2 with the p point of the lead screw 210 as a turning point.

In the magnetic head drive mechanism constructed as described above, the stepping motor 213 is driven to rotate the lead screw, which causes the carriage 205.
By moving the suspension 203, 20
It is possible to move and position the magnetic heads 201 and 202 provided in No. 4 to the target track of the flexible disk.

The method of loading and retracting such a carriage will be described below.

FIG. 7 is an operation explanatory view of the magnetic head drive mechanism in the second embodiment of the present invention.

FIG. 7 shows (v) → (w) → (x) → (y) →
The magnetic heads 201 and 202 retract in the order of (z), and (v) and (w) show the magnetic heads 201 and 202 in contact with the flexible disk, (x) and (x) respectively. (Y) is suspension 2
Cam-like protrusions 203 provided on 03 and 204
Reference numerals d and 204d show a state in which the loader shaft 212 is riding up, and (z) shows a state in which the retract is completed. Loading is the opposite.

In the states (x) and (y), the loader shaft 212 and the protruding portion 203 formed in a cam shape.
Since the suspensions 203 and 204 are pushed up by the d and 204d, the magnetic heads 201 and 202 do not hit the end portion 207a of the cartridge during the retract.

In the section (w)-(z), the protrusions 203d and 204d provided on the suspensions 203 and 204 are
The elastically deformable portions 203c and 204c of the suspension are pressed against the loader shaft by the restoring force. That is, the movement in the section of (w)-(z) is (v)-(w)
It requires more force than moving in the section. However, in the section (w)-(z), since the lead angle of the lead screw is θ1> θ2 with respect to the lead angle in the section (v)-(w), the reduction ratio by the lead screw is large. Therefore, it is possible to generate a large amount of power. According to the second embodiment, θ1 is almost twice as large as θ2.

This embodiment can be used not only for driving the flexible disk drive magnetic head as in the second embodiment, but also for driving a hard disk magnetic head or a magneto-optical disk magnetic head.

(Third Embodiment) FIG. 8 is an exploded perspective view of a spindle motor according to a third embodiment of the present invention, and FIG. 9 is a sectional view of a rotor assembly of a spindle motor according to the third embodiment of the present invention.

The rotor housing 305 has an H-shaped cross section in which both ends in the axial direction are concave.
The yoke 306 and the magnet 307 are provided at 5a so as to face the stator assembly.

The disk suction portion 305e having an H-shaped cross section has
Pin 310, a lever rotatably provided on the pin 310
303, a drive pin 302 provided at the tip of the lever 303, a torsion coil spring 304 for pushing up the lever 303, and a clamp magnet 301.

The clamp magnet 301 has a donut shape, and a release portion 301a for escaping the lever 303 having the drive pin 302 is formed in a part thereof. Similarly, a cutout 30 is formed in a part of the rotor housing.
5b is formed, and the drive pin 302 and the lever are formed.
I am running away from 303.

The center hole of the rotor assembly 311 constructed as described above is press-fitted into the shaft 309 rotatably supported by the bearing (not shown) of the stator assembly 308. Further, since a magnetic field is formed in the rotor assembly 311 by the yoke 306 and the magnet 307, the stator assembly 308
It is possible to rotate the rotor assembly by energizing the coil 312 provided in the.

The clamp magnet 301 has a hub 313.
Is for clamping the disk 314 to which is attached by magnetic attraction, and by fitting the rotor shaft 309 into the center hole 313a of the hub 313, the shaft 309 and the hub 313 can be concentrically clamped. it can.

The disk suction portion 305e of the rotor housing 305 has a concave cross section, and when the diameter d1 of the hub 313 is smaller than the inner diameter d2 of the concave cross section, the hub is clamped so as to fit into the rotor, When the diameter d1 of the hub 313 is larger than the inner diameter d2 of the concave cross section, the hub 313 comes into contact with the upper end portion 305c of the rotor and is clamped. In the third embodiment, a rotor assembly is formed so that the former is an optical recording / reproducing medium and the latter is a flexible disk.

FIG. 10 is an explanatory view showing a state in which the optical recording / reproducing medium is clamped to the spindle motor of the third embodiment of the present invention, and FIG. 11 is a spindle motor of the third embodiment of the present invention with a flexible disk. It is explanatory drawing which shows the clamped state.

In FIG. 10, the optical recording / reproducing medium 315 is provided with a hub 316, and the center hole 316 a of the hub 316 is fitted to the shaft 309, and the shaft 309.
It is positioned concentrically with. Since the hub 316 is made of a magnetic material, it is pulled toward the clamp magnet 301 by the magnetic force of the clamp magnet 301, abuts on the rotor housing 305, and is held by a magnetic attraction force. At this time, drive pin 302
Is larger than the restoring force of the torsion coil spring 304 pushing up the drive pin 302.
Since the magnetic attraction force by the magnet is several times larger, it is pushed down toward the stator assembly 308.

In FIG. 11, the flexible disk 3
The hub 17 has a hub 318, and the center hole 318 a of the hub 318 is fitted to the shaft 309 and positioned concentrically with the shaft 309. Hub 318
As it is made of magnetic material, the clamp magnet 3
The magnetic force of 01 pulls the clamp magnet 301 toward the clamp magnet 301, abuts on the rotor housing 305, and holds it by magnetic attraction.

In the flexible disk 317, the magnetic head (not shown) and the flexible disk 317 are in contact with each other when recording / reproducing, so that the load due to contact friction is large, and the rotor housing 305 and the hub 317 may deviate from each other. Drive pin 302 to hub 3
It is driven by fitting in the hole formed in 18.

In the third embodiment, the hub 318 provided on the flexible disk 317 is pulled toward the clamp magnet 301 by the magnetic force of the clamp magnet 301 and abuts on the rotor housing 305.
It is held by magnetic attraction, but the air gap between the clamp magnet 301 and the hub 318 is wide, so
Its suction power is weak. Therefore, immediately after the flexible disk 317 is clamped, the drive pin 302 is
Is pushed downward without fitting into the hole 318b formed in the hub 318, the flexible disk 31
7 does not rotate. Only when the drive pin 302 is fitted into the hole 318b formed in the hub 318, the rotor assembly 311 and the flexible disk 317 rotate at the same rotation speed.

[0063]

According to the present invention, a movable head for irradiating a recording area of an optical recording medium with laser light emitted from a laser oscillator, actuator means for moving and positioning the movable head, and a flexible disk. An optical recording / reproducing medium and a magnetic recording / reproducing medium are provided in one recording / reproducing device by including a magnetic head for recording / reproducing on / from a magnetic recording medium such as It has become possible to record and reproduce information on both sides.

Further, by providing a loading means, a shutter opening / closing means, a spindle motor and the like which can be used regardless of the recording / reproducing medium, the recording / reproducing apparatus can be made smaller, thinner, lighter and lower in cost. did it.

Further, there is provided detection means for detecting the magnetic recording medium such as an optical recording medium or a flexible disk by the shape of a cartridge storing the recording / reproducing medium, or after loading the recording / reproducing medium, It is possible to determine what the recording / reproducing medium is by a simple and inexpensive method by irradiating the laser beam emitted from the laser oscillator and determining the type of the recording / reproducing medium based on the presence / absence of reflected light of the laser beam. It was possible and the cost was reduced.

In a spindle motor used in such a recording / reproducing apparatus, in order to clamp a disk having a hub attached thereto by a magnetic attraction force, a rotor is provided with a magnet for generating the magnetic attraction force, and a rotor shaft Is a spindle motor for concentrically positioning the disc and the rotor, the disc suction portion of the rotor has a concave cross section, and when the hub of the disc is smaller than the inner diameter of the concave cross section, the hub is When the hub is clamped so as to fit into the rotor and the hub is larger than the inner diameter of the concave cross section, the hub is brought into contact with the upper end of the rotor to be clamped so that both the magnetic recording and reproducing medium and the optical recording and reproducing medium are A chuckable spindle motor can be provided. Further, the rotor has at least one drive pin having a restoring force capable of moving in the axial direction, and the clamping force when the hub is clamped so as to fit into the rotor is the upper end of the rotor. The flexible disk can be chucked by forming the magnet and the disk attracting section so that the clamping force becomes larger than the clamping force when the disk is in contact with and clamped.

In a magnetic head drive mechanism used in such a recording / reproducing apparatus, a magnetic head for recording / reproducing information, a suspension for supporting the magnetic head, and a carriage for supporting the suspension, In a magnetic head drive mechanism having an actuator means for moving and positioning the magnetic head to an arbitrary track of a recording / reproducing medium, a cam member is attached to a part of the suspension so that the magnetic head is moved to the recording / reproducing medium. Since it can be moved up and down, the magnetic head can be retracted in an extremely small space when the optical recording / reproducing medium is loaded. Further, since there is no need for a special retracting means, cost reduction and weight reduction can be achieved.

Further, since the cam is formed integrally with the suspension, the number of parts can be reduced, the cost can be reduced, and the reliability can be improved.

Further, in the above-mentioned actuator means, in which the rotational displacement of the rotary motor is converted into a linear displacement by the lead screw, the lead screw has at least one inflection point, which is necessary for magnetic head retract. It became possible to obtain the driving force by a simple method. Further, since the loader shaft for operating the cam means is provided, the magnetic head can be retracted by an extremely simple method.

As described above, it is possible to record / reproduce information on / from the optical recording / reproducing medium and the magnetic recording / reproducing medium with one recording / reproducing apparatus. In particular, in this embodiment, by providing an extremely thin recording / reproducing apparatus of 1 inch or less, it becomes possible to mount such a recording / reproducing apparatus on a portable computer or the like.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of essential parts of a recording / reproducing apparatus according to a first embodiment of the present invention.

FIG. 2 is a sectional side view of a main part of the recording / reproducing apparatus according to the first embodiment of the present invention.

FIG. 3 is a cross-sectional view of essential parts showing a state in which a cartridge storing an optical recording / reproducing medium is loaded in the recording / reproducing apparatus in Embodiment 1 of the present invention.

FIG. 4 is a cross-sectional view of essential parts showing a state in which a cartridge storing a flexible disk is loaded in the recording / reproducing apparatus according to the first embodiment of the present invention.

FIG. 5 is a plan view of a magnetic head drive mechanism according to a second embodiment of the present invention.

6 is a sectional view taken along line AA of FIG.

FIG. 7 is an operation explanatory view of the magnetic head drive mechanism in Embodiment 2 of the present invention.

FIG. 8 is an exploded perspective view of a spindle motor according to a third embodiment of the present invention.

FIG. 9 is a sectional view of a rotor assembly of a spindle motor according to a third embodiment of the present invention.

FIG. 10 shows a spindle motor according to a third embodiment of the present invention,
Explanatory drawing which shows the state in which the optical recording / reproducing medium was clamped.

FIG. 11 shows a spindle motor according to a third embodiment of the present invention,
Explanatory drawing which shows the state in which the flexible disk was clamped.

[Explanation of symbols]

 101 ... Base frame 102 ... Spindle motor 103 ... Cartridge holder assembly 104 ... Slide plate 108 ... Movable head assembly 115, 116, 201, 202 ... Magnetic head 117, 205 ... Carriage 118, 119, 203, 204 ... Suspension 123 ... Stepping motor Assembly 124, 210 ... Lead screw 128 ... Cartridge holder 134 ... Switch 135 ... Shutter opening / closing arm 151, 315 ... Optical recording / reproducing medium 153 ... Laser oscillator 154 ... Loader shaft 161, 206 ... Flexible disk 301 ... Clamp magnet 302 ... Drive pin 311 … Rotor assembly

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masatoshi Yoneku 3-3-5 Yamato, Suwa City, Nagano Seiko Epson Corporation

Claims (16)

[Claims] 1. A laser beam emitted from a laser oscillator,
A movable head for irradiating the recording area of the optical recording medium,
An actuator means for moving and positioning the movable head, a magnetic head for recording and reproducing on a magnetic recording medium such as a flexible disk, and an actuator means for moving and positioning the magnetic head. Recording / playback device. 2. A loading means for loading a disk made of a magnetic recording medium such as the optical recording medium or a flexible disk stored in a cartridge at a predetermined position, and for opening and closing a shutter provided in the cartridge. 2. The recording / reproducing apparatus according to claim 1, further comprising: a shutter opening / closing means and a spindle motor for rotatably supporting the disk. 3. The recording / reproducing apparatus according to claim 1, further comprising a discriminating unit for discriminating whether the recording medium stored in the cartridge is an optical recording medium or a magnetic recording medium. 4. A detection means for detecting the discrimination of the recording medium by the shape of a cartridge storing the magnetic recording medium such as the optical recording medium or a flexible disk. Recording and reproducing device. 5. The recording / reproducing apparatus according to claim 4, wherein the loading means is provided with a switch for detecting the thickness of the cartridge, and the thickness of the cartridge is detected by turning on / off the switch. 6. After loading the recording / reproducing medium,
4. The type of the recording / reproducing medium is determined by irradiating the recording / reproducing medium with laser light emitted from the laser oscillator, and determining whether or not the reflected light of the laser light is present.
The recording / reproducing apparatus described. 7. The loading means comprises a cartridge holder, at least one preload spring provided in the cartridge holder, a slide plate, and a coil spring provided in the slide plate. 2. The recording / reproducing apparatus according to item 2. 8. The shutter opening / closing means is formed of a swing arm, a pin arranged in a part of the swing arm, and a spring for returning the swing arm to an initial position. The recording / reproducing apparatus described. 9. A rotor is provided with a magnet for generating the magnetic attraction force for clamping the disc to which the hub is attached by the magnetic attraction force, and the rotor shaft concentrically forms the disc and the rotor. A spindle motor for positioning, wherein the disc suction portion of the rotor has a concave cross section, and when the hub of the disc is smaller than the inner diameter of the concave cross section, the hub is clamped to fit the rotor, The spindle motor, wherein when the hub is larger than the inner diameter of the concave cross section, the hub comes into contact with the upper end portion of the rotor and is clamped. 10. The spindle motor according to claim 9, wherein the rotor has at least one drive pin having a restoring force capable of moving in the axial direction. 11. The magnet and the hub so that the clamping force when the hub is clamped so as to be fitted to the rotor is larger than the clamping force when the hub is in contact with the upper end portion of the rotor and is clamped. 10. The spindle motor according to claim 9, wherein a disk suction portion is formed. 12. A magnetic head for recording and reproducing information, a suspension for supporting the magnetic head, and a carriage for supporting the suspension.
A magnetic head drive mechanism having an actuator means for moving and positioning the magnetic head to an arbitrary track of a recording / reproducing medium, wherein a cam member is attached to a part of the suspension so that the magnetic head is moved to the recording / reproducing medium. A magnetic head drive mechanism characterized by being raised and lowered with respect to the magnetic head drive mechanism. 13. The magnetic head drive mechanism according to claim 12, wherein the cam is formed integrally with the suspension. 14. A magnetic head for recording and reproducing information, a suspension for supporting the magnetic head, and a carriage for supporting the suspension.
A magnetic head driving mechanism comprising: an actuator means for moving and positioning the magnetic head to an arbitrary track of a recording / reproducing medium, wherein the actuator means converts a rotational displacement of a rotary motor into a linear displacement by a lead screw. The magnetic head drive mechanism according to claim 1, wherein the lead screw has at least one turning point. 15. A magnetic head for recording / reproducing information, a suspension for supporting the magnetic head, cam means formed separately or integrally with the suspension, and for supporting the suspension. A magnetic head drive mechanism comprising a carriage and actuator means for moving and positioning the magnetic head on an arbitrary track of a recording / reproducing medium, wherein the actuator means linearly changes rotational displacement of a rotary motor by a lead screw. A magnetic head driving mechanism, wherein the magnetic head is moved up and down with respect to the recording / reproducing medium in the conversion into displacement. 16. A magnetic head driving mechanism according to claim 12, 13 or 14 or 15, further comprising a loader shaft for operating said cam means.