JP2006179103A - Disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely avoid the contact of a disk with a ramp load by a simple constitution. <P>SOLUTION: An engaging piece 64 is provided at a position on a first arm 18, which is located away from an optical disk 1A to a floating slider 13 mounted to the first arm 18. When a swing arm 5 is swung and moved from a loading position (a) to an unloading position (b), the engaging piece 64 is engaged with a guide face 9002 of a ramp load 9 and moved along the slope of the guide face 9002. By this, the first arm 18 is elastically deformed in the width direction of the optical disk 1A and in the direction leaving the optical disk 1A, and the floating slider 13 is moved in the direction leaving from the surface of the optical disk 1A. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a disk device.

In a hard disk drive, in many cases, a floating magnetic head is provided at one end of an arm, and the other end of the arm is swung around an axis extending in the thickness direction of the magnetic disk to magnetize the magnetic head. It is moved in the radial direction of the disc.
In such a hard disk device, the magnetic head is positioned (loaded) on the recording surface of the magnetic disk during operation, and is retracted (unloaded) outward from the recording surface in the radial direction from the recording surface during non-operation. A ramp load system is known as one of the load / unload mechanisms.
In the ramp loading method, an engaging portion is provided at the tip of the arm, and when the hard disk drive is not operating, the arm is swung outward in the radial direction of the magnetic disk, and the engaging portion at the tip of the arm is near the outer periphery of the magnetic disk. The magnetic head is moved in a direction away from the surface of the magnetic disk to be kept in the state by being engaged with the ramp load disposed in the head.
In such a hard disk drive device, when vibration or impact is applied, a mechanism for retracting the ramp load from the magnetic disk to the outside of the magnetic disk in order to avoid a collision between the ramp load and the magnetic disk is provided. Providing is proposed (Patent Document 1).
JP 2002-93090 A

On the other hand, even in a disk device in which an optical disk or a magnetic disk is detachably mounted on a spindle motor turntable, a floating optical pickup or magnetic head that operates on the same principle as the above-described floating magnetic head is employed. There is something.
Even when such a floating optical pickup or magnetic head is employed, it is conceivable to use a ramp load system as a load / unload mechanism of the optical pickup or magnetic head.
In such a disk device, since the attitude of the optical disk or the magnetic disk is not determined until the optical disk or the magnetic disk is mounted on the turntable, the optical disk or the magnetic disk may easily come into contact with the ramp load.
Therefore, in order to reliably avoid contact between the optical disk or magnetic disk and the ramp load, it is necessary to ensure a large distance between the disk and the ramp load, and the ramp load is retracted as in the above-described conventional technique. Although it is conceivable to provide a mechanism, such a mechanism has a drawback of being complicated and costly.
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a disk device that can reliably avoid contact between the disk and the ramp load with a simple configuration.

In order to achieve the above object, the present invention is provided with a turntable that detachably holds an optical disk and rotates while holding the optical disk, and is swingable in a radial direction of the optical disk mounted on the turntable. An oscillating arm and a rotating optical disk provided at the tip of the oscillating arm are irradiated with a light beam for recording and / or reproducing information, and the irradiated optical beam is reflected by the optical disk. And an optical pickup that detects a reflected light beam by light, and the swing arm is composed of a plurality of arms that are stacked in the thickness direction of the optical disk mounted on the turntable and swing integrally. Among the plurality of arms constituting the moving arm, the arm positioned closest to the optical disc side is provided with an objective lens constituting a part of the optical pick arp The first arm has a length and is elastically deformable in the thickness direction of the optical disc, and the objective lens and the flying slider are provided at the tip in the length direction; and An engagement piece for elastically deforming the tip of the first arm in the thickness direction of the optical disc is provided, and the tip of the swing arm is attached to the turntable by swinging of the swing arm. When moving away from the optical disk in the radial direction of the optical disk, the tip of the first arm is elastically deformed by engaging with the engaging piece, and the flying slider is moved away from the optical disk in the thickness direction of the optical disk. A ramp load having a guide surface to be positioned is provided, and the engaging piece is located at a location away from the location of the first arm where the flying slider is provided in the thickness direction of the optical disc. Vignetting wherein the are.
The present invention also provides a turntable that detachably holds a magnetic disk and rotates while holding the magnetic disk, and a swing provided so as to swing in a radial direction of the magnetic disk mounted on the turntable. An arm, and a magnetic head that is provided at a tip portion of the swing arm and records and / or reproduces information with respect to the rotating magnetic disk, and the swing arm has a length and has the magnetic It is elastically deformable in the thickness direction of the disk, the magnetic head is provided at the front part in the length direction, and a flying slider is provided, and the front part of the swing arm is provided in the thickness direction of the magnetic disk. An engagement piece for elastic deformation is provided, and by swinging the swing arm, the tip of the swing arm is moved from the magnetic disk mounted on the turntable in the radial direction of the magnetic disk. A ramp having a guide surface that engages with the engaging piece when moving away and elastically deforms the tip of the swing arm to position the flying slider away from the magnetic disk in the thickness direction of the magnetic disk A load is provided, and the engagement piece is provided at a location away from the location of the swing arm provided with the floating slider in the thickness direction of the magnetic disk.

According to the present invention, since the engaging piece is provided at a position located away from the optical disk or the magnetic disk with respect to the position where the flying slider is attached, the guide surface of the ramp load is provided on the optical disk or the magnetic disk. It is possible to dispose at a position away from the disk in the thickness direction.
For this reason, the guide surface of the ramp load is located at a position away from the optical disk or magnetic disk in the thickness direction, so that the contact between the ramp load and the optical disk or magnetic disk can be surely avoided.

  The present invention achieves the above object by providing the engaging piece that engages with the ramp load at a position away from the position where the flying slider is provided in the thickness direction of the optical disk or magnetic disk.

Embodiments in which the present invention is applied to an optical disc apparatus will be described below.
FIG. 1 is an exploded perspective view showing the configuration of the optical disk apparatus according to the first embodiment, and FIG. 2 is a block diagram showing a control system of the optical disk apparatus.
3 is a perspective view of the swing arm, FIG. 4 is an exploded perspective view of the swing arm as viewed from above, FIG. 5 is an exploded perspective view of the swing arm as viewed from below, and FIG. 6 is an exploded perspective view of the OP base portion. 7 is an exploded perspective view of the collimator lens / actuator section, FIG. 8 is an exploded perspective view of the slider / suspension section, FIG. 9 is a principle diagram of the optical system, and FIG. 10 is an explanatory view showing a manufacturing method of the lens plate, FIG. FIG. 4 is a principle diagram of focal position correction by a collimator lens.
FIG. 12 is a plan view of the first arm 18.
FIG. 13 is an explanatory diagram of the load / unload operation in the first embodiment, and FIG. 14 is an explanatory diagram showing the positional relationship between the optical disc 1A and the ramp load 9 in the first embodiment.
As shown in FIG. 1, the optical disc apparatus 100 is for a disc cartridge 1 of 85.6 mm (length) × 54 mm (width) × 5 mm (thickness) size (PCMCIA Type 2 size).
First, the disk cartridge 1 will be described.
The disc cartridge 1 is composed of an optical disc 1A and a cartridge 2 containing the optical disc 1A. The optical disk 1A is normally stored and used in a state of being stored in the cartridge 2.
The optical disk 1A has an annular plate shape, and a disk-shaped magnetic piece (hub) is bonded around the center hole thereof, and alignment with a rotating shaft of a spindle motor 3 (to be described later) and adsorption by a magnetic force are performed by the hub. It is configured as follows.
In this specification, an optical disk refers to a disk-shaped recording medium (optical disk) that records and / or reproduces information by irradiating a light beam, and information by irradiating a light beam with a magnetic field applied. It includes both a disk-shaped recording medium (a magneto-optical disk) that performs recording and reproduces information by irradiating a light beam.
An openable / closable shutter is attached to the lower surface of the cartridge 2 so that the shutter is opened when loaded into the optical disc apparatus 100, and reading and writing are performed by an optical pickup device 200 described later through the opening. It has become.

The optical disc apparatus 100 includes a chassis 4 having a rectangular plate-like bottom plate, and a top cover 12 whose bottom is opened and fitted onto the chassis 4, and a spindle is accommodated in a housing space constituted by the chassis 4 and the top cover 12. The motor 3, the turntable 3A, the electric circuit board 11, and the optical pickup device 200 are accommodated.
The spindle motor 3 is fixed in the recess of the chassis 4, the turntable 3 </ b> A is fixed to the rotation shaft of the spindle motor 3, and the turntable 3 </ b> A is configured to be driven to rotate by the spindle motor 3.
The turntable 3A has a chuck mechanism that detachably holds the optical disc 1A. That is, the chuck mechanism is configured to chuck and rotate the hub of the optical disc 1A with a magnetic force when the disc cartridge 1 is inserted onto the turntable 3A from the direction of the arrow as shown in FIG.
The electric circuit board 11 is fixed to the chassis 4.

The swing arm 5 is provided so as to be swingable in the radial direction of the optical disc 1A mounted on the turntable 3A.
The swing arm 5 is provided with a coil 32A (see FIG. 3). As shown in FIG. 1, the coil 32A is electrically connected to the electric circuit board 11 via the flexible board 10 and driven. A current is supplied.
A magnetic circuit 7 is provided in the chassis 4 in the vicinity of the swing arm 5. This magnetic circuit 7 has a magnet, and constitutes a voice coil motor together with the coil 32A, and a swinging motor 105 (see FIG. 2) for swinging the swinging arm 5 by this voice coil motor.

The swing arm 5 is provided with an optical pickup device 200.
The optical pickup device 200 is configured such that the swing arm 5 is swung by a swing motor 105, whereby the optical pickup device 200 is moved to a predetermined recording track on the optical disc 1A.
Further, the optical pickup device 200 is provided with a focusing actuator 90 (see FIGS. 4 and 5) described later for adjusting the focal position of the light beam.

As shown in FIG. 2, the spindle motor 3 is configured to be driven and controlled at a predetermined rotational speed by a system controller 107 and a servo control unit 109.
The signal modulation / demodulation unit and ECC block 108 modulates and demodulates a signal output from the signal processing unit 120 and adds an ECC (error correction code). The optical pickup device 200 irradiates the signal recording surface of the optical disc 1 </ b> A rotating according to instructions from the system controller 107 and the servo control unit 109 with a light beam. Recording and reproduction of an optical signal with respect to the optical disc 1A is performed by such light irradiation.
Further, the optical pickup device 200 can detect various light beams as described later based on the reflected light beam from the signal recording surface of the optical disc 1A, and can supply a signal corresponding to each light beam to the signal processing unit 120. It is configured as follows.

The signal processing unit 120 is a servo control signal based on a detection signal corresponding to each light beam, that is, a focus error signal, a tracking error signal, an RF signal, and an ATIP necessary for controlling the rotation of the optical disc during recording. A signal or the like can be generated. Further, predetermined processing such as demodulation and error correction processing based on these signals is performed by the servo control unit 109, the signal modulation and ECC block 108, and the like according to the type of recording medium to be reproduced.
Here, if the recording signal demodulated by the signal modulation and ECC block 108 is, for example, for data storage of a computer, it is sent to the external computer 130 or the like via the interface 111. As a result, the external computer 130 and the like are configured to receive a signal recorded on the optical disc 1A as a reproduction signal.

Also, if the recording signal demodulated by the signal modulation and ECC block 108 is for audio / visual use, the digital / analog conversion is performed by the D / A conversion unit of the D / A and A / D converter 112 for audio / visual processing. Supplied to the unit 113. Audio / video signal processing is performed by the audio / visual processing unit 113 and transmitted to an external imaging / projection device via the audio / visual signal input / output unit 114.
Control of the spindle motor 3, control of the oscillating motor 105, and control of the focusing actuator 90 are performed by a servo control unit 109, respectively.
The servo control unit 109 also supplies a drive signal (drive current) to be supplied to the oscillating motor 105 and the focusing actuator 90 based on the focus error signal, tracking error signal, RF signal, and the like input from the signal processing unit 120. ) Are generated respectively.
The laser control unit 121 controls a light beam source in the optical pickup device 200.

Next, the optical pickup device 200 will be described in detail.
As shown in FIGS. 4 and 5, the swing arm 5 has a length, and an intermediate portion in the length direction is configured as a support shaft portion 6 serving as a swing center. Therefore, the swing arm 5 is supported. The shaft 5 has a base 5A extending in one direction and a main body 5B extending from the support shaft 6 in the other direction. The swing arm 5 swings around the support shaft 6. .
More specifically, the swing arm 5 is composed of three arms that are integrally swung in the thickness direction of the optical disc 1A mounted on the turntable 3A. These three arms are the first arm 18, the second arm 19, and the third arm 22 in order from the optical disk 1A.

The support shaft portion 6 includes a support shaft 3102 projecting from the chassis 4, a bearing unit 31, a tube portion 49, and the like, and the base portion 5 </ b> A and the tube portion 49 are integrally provided.
A housing (outer race) 3104 of the bearing unit 31 is inserted into the hole 48 of the third arm 22 and further inserted into the inner peripheral portion of the cylindrical portion 49. The housing 3104, the hole 48 of the third arm 22, the cylindrical portion 49 is fixed by adhesion, and a support shaft 3102 protruding from the chassis 4 is inserted into the bearing unit 31.
Therefore, the base 5A and the third arm 22 swing integrally with the support shaft 3102 as a fulcrum.

The base 5A has a frame shape, the base 5A is provided with a coil 32A (see FIG. 3), and a coil bobbin unit 32 is constituted by the base 5A and the coil 32A.
The coil 32A and the electric circuit board 11 are connected by the flexible board 10 (see FIG. 1).

The third arm 22 is made of a sheet metal having a thickness of about 1 mm or less made of an iron-based or copper-based alloy, and rigidity is secured so as not to be deformed.
The third arm 22 is subjected to copper plating (in the case of an iron-based material), solder plating, or the like so that the solder is easily attached. The reason for plating the third arm 22 in this way is to fix the integrated OP unit 17 and the magnetic circuit 71 to the third arm 22 by soldering.

The third arm 22 has a length, and the hole 48 is formed at one end in the length direction.
A rectangular hole 22 </ b> A is formed at the other end of the third arm 22.
The integrated OP unit 17 is mounted in the hole 22A.
As shown in FIG. 9, the integrated OP unit 17 includes an optical disk on the surface of a silicon substrate 17A on which photodetectors 29 and 30 (hereinafter referred to as PD) and an electric circuit forming a light receiving element that receives a reflected light beam from the optical disk 1A. A semiconductor laser 27 and a beam splitter 28 (hereinafter referred to as BS) constituting a light source for emitting a light beam are mounted on 1A.
In this embodiment, the silicon substrate 17A is formed to have a width of about 3 mm, a length of 4 mm, and a thickness of about 0.3 mm, and the silicon substrate 17A is positioned so that the PDs 29, 30, the semiconductor laser 27, and the BS 28 are located inside the hole 22A. They are applied to the surface of the third arm 22 on the side away from the optical disc 1A and fixed by solder.
A cover glass 16 with a concave lens is bonded and fixed so as to cover the hole 22A from the surface of the third arm 22 facing the optical disc 1A.
The cover glass 16 with a concave lens is made of a transparent glass plate having a rectangular plate shape, and a concave lens 53 is formed in the approximate center thereof. In this embodiment, the cover glass 16 with a concave lens is formed with dimensions of a width of 3 mm, a length of 4 mm, and a thickness of about 0.3 mm, and the concave lens 53 is formed with a diameter of 0.3 mm.
More specifically, first, the integrated OP unit 17 is fixed to the third arm 22 so as to face the hole 22A, and then the cover glass 16 with a concave lens is a light beam from which the concave lens 53 is emitted from the integrated OP unit 17. The position is adjusted in an inert gas so as to be aligned with the optical axis of the first arm 22 and bonded and fixed to the third arm 22.
As a result, the inert gas is sealed in the space sealed at the inner periphery of the cover glass 16 with concave lens, the integrated OP unit 17 and the hole 22A, so that dust contamination and corrosion of the semiconductor laser 27 are prevented.
Further, the distance accuracy between the integrated OP unit 17 and the concave lens 53 is also important, and depending on the optical system, an accuracy of about several μm to 10 μm is required.
This accuracy is a value that cannot be obtained only by the plate thickness accuracy of a general sheet metal. Therefore, this accuracy is realized by controlling the thickness of the plating applied to the third arm 22.

The third arm 22 has a width in a direction perpendicular to the length, and the integrated OP unit 17 is arranged with an inclination with respect to an imaginary line passing through the center of the hole 48 and passing through the center in the width direction.
The optical pickup device 200 of the optical disk apparatus 100 of this embodiment is of a swing arm type, and when the inner and outer circumferences of the optical disk 1A are accessed, an azimuth angle is generated with respect to the recording track. When the azimuth angle is generated, the sensitivity of the tracking error signal is deteriorated. In order to minimize the deterioration, the integrated OP unit 17 is arranged with an inclination (at an angle) as described above so that the azimuth angle is 0 degree in the approximate center of the access area.

As shown in FIG. 6, a flexible substrate 25 is attached to the back surface of the silicon substrate 17 </ b> A of the integrated OP unit 17.
The flexible substrate 25 is provided with land portions (conductor exposed portions), and these land portions are electrically connected to the photodetectors 29 and 30, the electric circuit, and the semiconductor laser 27, and electrical terminals provided on the back surface of the silicon substrate 17 </ b> A. Electrical conduction can be achieved by direct crimping.
The integrated OP unit 17 is electrically connected to the electric circuit board 11 through the flexible board 25.

A rectangular hole 22B is formed near the other end of the third arm 22, and the magnetic circuit 71 is disposed in the third arm 22 through the hole 22B.
The magnetic circuit 71 is composed of a magnet 24 and a magnet yoke 23, and is for driving a collimator lens / actuator unit 74 described later.
The magnet 24 is magnetized with two poles on the front and back sides, and the magnet yoke 23 has a base and two yoke pieces that stand up from the base and face each other at a distance from each other, and is made of a magnetic iron material. Solder plating such as solder plating is applied. The magnet 24 is attached to one of the two yoke pieces, and the magnetic flux emitted from the magnet 24 passes through the space gap and forms a closed magnetic path through the other yoke piece.
The magnet yoke 23 is fixed to the lower surface of the third arm 22 with the two yoke piece portions facing upward via an opening 22 </ b> B provided in the third arm 22. This fixing is performed by soldering or bonding. However, in the case of bonding fixing, copper plating or solder plating of the third arm 22 becomes unnecessary.
Further, a narrowing portion 52 is formed so as to project upward at a position near one end of the third arm 22, and in the extending direction of the third arm 22 at opposite edges of the third arm 22 sandwiching the narrowing portion 52. Two convex portions 44 are provided at intervals.
In this embodiment, the OP base 72 is constituted by the third arm 22, the cover glass 16 with concave lens, the integrated OP unit 17, the magnetic circuit 71, and the like.

The second arm 19 has a length, and the second arm 19 includes a support spring mounting portion 47 and a support spring load beam 54 arranged in the length direction.
The support spring mount 47 and the support spring load beam 54 are connected by two leaf springs 55.
Therefore, the second arm 19 can be elastically deformed in the thickness direction of the optical disc 1 </ b> A via the two leaf springs 55.
In the present embodiment, the support spring mount portion 47 is made of an iron-based or copper-based sheet metal having a thickness of about 0.3 mm or less, and the rigidity is secured so as not to be deformed.
In the support spring mount portion 47, four claw portions (bending portions) 43 are fixed to the four convex portions 44 of the third arm 22 by soldering. When the support spring mount portion 47 is made of an iron-based material, at least the claw portion 43 is subjected to copper plating or solder plating.
Therefore, the second arm 19 swings integrally with the third arm 22.
A hole 42 for attaching the first arm 18 is formed in the support spring mount portion 47.
The support spring load beam 54 is also made of an iron-based or copper-based sheet metal having a thickness of about 0.3 mm or less, and rigidity is ensured so as not to be deformed.
The support spring load beam 54 is formed with a hole 54 </ b> A for inserting the magnetic circuit 71.
The two leaf springs 55 are made of a thin iron-based material or copper-based spring material having a thickness of 0.1 mm or less, and both ends in the length direction are point welded to the support spring mount 47 and the support spring load beam 54, respectively. It is fixed with.

The quarter wave plate 14 and the lens plate 15 are superposed and pasted on the tip of the support spring load beam 54.
In this embodiment, the quarter wavelength plate 14 is formed in a rectangular plate shape having a width of 3 mm, a length of 3 mm, and a thickness of about 0.1 mm.
The lens plate 15 is formed of a rectangular glass plate having a width of 3 mm, a length of 3 mm, and a thickness of about 0.3 mm, and a collimator lens 15A having a diameter of about 0.5 mm is provided at the approximate center.
The drive coil 20 is bonded and fixed to the surface where the support spring load beam 54 faces the first arm 18.
The drive coil 20 constitutes a voice coil motor in combination with the magnetic circuit 71 of the third arm 22. The support spring load beam 54 is driven up and down by the voice coil motor. In other words, the voice coil motor constitutes the focusing actuator 90 (see FIGS. 4 and 5) for vertically moving the collimator lens 15A.
A flexible substrate 21 that electrically connects the drive coil 20 and the electric circuit substrate 11 is provided, and the flexible substrate 21 is bonded and fixed to a surface where the support spring mounting portion 47 and the support spring load beam 54 face the first arm 18. ing.
After the second arm 19 is positioned and fixed to the third arm 22, the magnetic circuit 71 is positioned and fixed to the third arm 22 according to the position of the drive coil 20 of the second arm 19.
In this embodiment, the quarter wavelength plate 14, the lens plate 15, the second arm 19, the drive coil 20, and the flexible substrate 21 constitute a collimator lens / actuator unit 74.

As shown in FIG. 8, the first arm 18 has a length, and includes a suspension mount portion 45 and a suspension load beam 62 arranged in the length direction.
The suspension mount 45 and the suspension load beam 62 are connected by a leaf spring 63.
The suspension mount portion 45 is formed in a rectangular plate shape with an iron-based or copper-based sheet metal having a thickness of about 0.3 mm or less, and rigidity is ensured so as not to be deformed.
The suspension mount portion 45 is provided so that the short side is parallel to the longitudinal direction of the first arm 18.
A launching portion (burring) 41 is provided in the center of the suspension mount portion 45 in the downward direction.
The launch portion 41 is fixed to the hole 42 of the support spring mount 47 of the second arm 19 by caulking or welding. The outer diameter of the punched portion 41 before crimping or welding and the inner diameter of the hole 42 are formed with a fitting gap of about 10 μm or less.
Accordingly, the first arm 18 swings integrally with the third arm 22 together with the second arm 19.
A V-shaped notch 46 for assembling adjustment described later is provided at the center of the two short sides of the suspension mount 45.

The suspension / load beam 62 is made of an iron-based or copper-based sheet metal having a thickness of about 0.3 mm or less, and rigidity is secured so as not to be deformed.
The flying slider 13 is bonded and fixed to the tip (one end in the length direction) of the suspension load beam 62.
In this embodiment, an objective lens 61 for converging the light beam emitted from the integrated OP unit 17 onto the optical disc 1A is embedded in the flying slider 13.
The leaf spring 63 is made of a thin iron-based material or copper-based spring material having a thickness of 0.1 mm or less, and both sides thereof are fixed to the suspension mount portion 45 and the suspension load beam 62 by point welding. .
Therefore, the third arm 22 can be elastically deformed in the thickness direction of the optical disc 1 </ b> A via the two leaf springs 63.
The leaf spring 63 is previously bent so that the pressing force of the flying slider 13 is about 5 gf or less acts on the optical disc 1A when the optical pickup device 200 is positioned on the optical disc 1A (use state). Has been.
In this embodiment, a slider / suspension section 76 is constituted by the first arm 18 and the floating slider 13 with an objective lens.

Further, as shown in FIG. 2, a hole 60 for escaping the magnetic circuit 71 portion of the third arm 22 is provided at a position near the leaf spring 63 of the suspension / load beam 62.
As shown in FIG. 4, a suspension stopper 26 having a contour larger than the contour of the hole 60 is attached to the upper end of each yoke piece of the magnet yoke 23 so as to face the hole 60. By abutting the edge of 60, the upward movement of the suspension / load beam 62 (movement in the direction approaching the optical disc 1A) is regulated.
Each notch 46 is used to clamp the assembly of the slider / suspension section 76 and the collimator lens / actuator section 74 to the third arm 22 with a pin from both sides with a jig.

Here, the flying slider 13 will be described in detail.
In the opening provided at the tip of the suspension / load beam 62, an annular plate-like adhesive portion 59 having an adhesive hole 57 formed in the center is provided, and an outer periphery of the adhesive portion 59 is an intermediate portion larger than the adhesive portion 59. A ring 65 is provided, and a narrow spring portion connects the adhesive portion 59 and the intermediate ring 65 and between the intermediate ring 65 and the edge of the opening. The intermediate ring 65 and the spring portion constitute a hinge spring portion called a flexure for absorbing the inclination of the flying slider 13 in the roll / pitch direction. The hinge spring portion is formed from the suspension load beam 62 by etching and half etching.
The flying slider 13 is placed on the upper surface of the suspension / load beam 62 so that the center thereof coincides with the bonding hole 57, and is fixed by pouring an adhesive from the lower surface into the bonding hole 57 and curing it.
The light beam enters from the lower side in FIG. 8 and enters the objective lens 61 of the flying slider 13 through the gap 58 of the hinge spring portion.
In this embodiment, the flying slider 13 can be attached with a skew angle of about ± 20 degrees at the maximum, depending on the position of the objective lens 61. In the present embodiment, the skew angle is an angle formed by the longitudinal direction of the first arm 18 and the length direction of the slider 13. If the longitudinal direction of the first arm 18 and the length direction of the slider 13 are parallel, the skew is performed. The angle is 0 degrees.
In this embodiment, the hinge part and the adhesive part 59 are provided so that the light passing through the gap 58 of the hinge spring part does not interfere with the adhesive part 59 even if the flying slider 13 is attached with a skew angle.
Further, in the direction orthogonal to the longitudinal direction of the first arm 18, a half-etched portion 66 similar to the hinge spring portion is provided at the edge of the opening that sandwiches the intermediate ring 65. This is because when the flying slider 13 receives a downward force due to a disturbance impact or the like, the flying slider 13 is locked to the flying slider 13, thereby preventing the flying slider 13 from hitting the hinge spring portion and plasticity of the hinge spring portion. Functions as a stopper to avoid deformation.

The flying slider 13 is made of glass and formed in a rectangular plate shape having a width of 2.8 mm, a length of 2 mm, and a thickness of 0.6 mm. The flying slider 13 is an air bearing that faces the disk recording surface of the optical disk 1A. It has a surface. That is, an air bearing rail shape similar to that of an HDD flying slider is provided on the upper surface facing the optical disc 1A, and the surface of the rail shape (air bearing surface) and the surface of the optical disc 1A (disc recording surface) are provided. It functions as a flying slider (flying head) by forming an air bearing.
In this embodiment, although it depends on the linear velocity of the optical disk 1A, it is designed to fly with a flying height of about 0.1 μm to 1 μm.

Here, a manufacturing method of the lens plate 15 and the flying slider 13 will be described with reference to FIG.
First, the lens plate 15 will be described.
As shown in FIGS. 10A and 10B, a molded glass 90 in which a concave portion 92 is formed by upper and lower molds A and B is formed in the same manner as in manufacturing a lens by a general glass mold. Conventionally, when making a small mold lens, there is a limit to the size of a tool for processing a mold, and there is a restriction on miniaturization.
However, since the mold A has a convex shape, it is difficult to be restricted by the size of the cutting tool in the mold processing, and thus a small lens can be manufactured.
Next, as shown in FIG. 10C, a high-refractive-index material 94 made of niobium oxide or the like is formed by sputtering so as to fill the recess 92 of the molded glass 90.
Thereafter, as shown in FIG. 10D, the molded glass 90 is polished until the high-refractive index material 94 remains only in the concave portion 92 of the glass. The collimating lens 15 </ b> A is configured by the high refractive part formed as described above functioning as a convex lens with respect to light transmitted through the glass surface.

The flying slider 13 is manufactured as follows.
That is, after the objective lens 61 is made by the same process as in FIG. 10, glass is attached to the flying slider 13 that faces the flat surface of the objective lens 61.
Next, a rail surface shape as a floating slider is formed on the outer surface of the attached glass by a dry etching method such as ion milling.
Finally, it is completed by cutting it into a slider shape.
Moreover, the cover glass 16 with a concave lens uses the molded glass which made the concave lens 53 by the process similar to FIG. 10 as it is.

Next, assembly of the optical pickup device 200 will be described.
As shown in FIGS. 4 and 5, first, the slider 41 and the collimator are fixed by caulking or welding by inserting the projecting portion 41 of the slider / suspension portion 76 into the hole 42 of the collimator lens / actuator portion 74. The lens actuator unit 74 is integrated.
Next, the two notches 46 of the slider / suspension section 76 are clamped by an adjusting jig, the position and inclination of the integrated collimator lens / actuator section 74 and slider / suspension section 76 are adjusted, and the OP base section Position with respect to 72.
Then, the four claw parts 43 of the collimator lens / actuator part 74 are overlapped with the four convex parts 44 of the third arm 22 to fill the gap between the claw part 43 and the convex part 44 with solder. Further, the throttle portion 52 of the third arm 22 is inserted into the inner periphery of the launch portion 42 of the suspension mount portion 45, and the gap between the launch portion 42 and the throttle portion 52 is filled with solder to increase the rigidity. As a result, the OP base 72, the collimator lens / actuator 74, and the slider / suspension 76 are integrated.
Although the case where solder is used to fix the OP base portion 72, the collimator lens / actuator portion 74, and the slider / suspension portion 76 is described here, an adhesive may be used instead of the solder. However, when it is fixed using solder, it is advantageous in terms of increasing rigidity, suppressing displacement due to temperature to ensure reliability, and grounding. Further, the reason why the projecting portion 41 of the slider / suspension portion 76 and the hole 42 of the collimator lens / actuator portion 74 are fixed by caulking or welding is to ensure sufficient durability against the high temperature caused by such soldering. It is.
Next, the bearing unit 31 is inserted into the hole 48 of the third arm 22 and the cylindrical portion 49 of the base portion 5A. Here, the boss 51 (see FIG. 5) of the cylindrical portion 49 is fitted into the cutout portion 50 of the third arm 22, so that the bearing unit 31 swings with respect to the third arm 22 of the base portion 5A (coil bobbin unit 32). Positioning in the rotational direction about the axis is performed.
Then, the OP base portion 72, the collimator lens / actuator portion 74, and the slider / suspension portion 76 are bonded and fixed to the housing 3104 of the bearing unit 31 with the hole 48 of the third arm 22 and the cylindrical portion 49 of the base portion 5A. The base portion 5A is integrated, and the optical pickup device 200 is assembled as shown in FIG.
Therefore, the main body portion 5B is configured by the OP base portion 72, the collimator lens / actuator portion 74, and the slider / suspension portion 76 being stacked in this order from the bottom to the top.

  The optical pickup device 200 is attached to the chassis 4 by a conventionally known attachment structure (for example, screwing) to the chassis 4 with the support shaft 3102 of the bearing unit 31 aligned with the thickness direction of the optical disc 1. By doing so, the swing arm 5 is swingably mounted around the support shaft 3102 via the bearing unit 31.

Next, the optical system of the optical pickup 8 will be described with reference to FIG.
In this embodiment, the optical pickup 8 has an integrated OP unit 17, a concave lens 53, a collimator lens 15 </ b> A, a quarter wavelength plate 14, and an objective lens 61.
The light beam composed of linearly polarized laser light emitted from the semiconductor laser 27 is reflected upward in FIG.
The light beam has its divergence angle enlarged by the concave lens 53 and is incident on the collimator lens 15A. Thus, by increasing the divergence angle by the concave lens 53, the distance between the collimator lens 15A and the glass plate 16 with the concave lens can be shortened, which contributes to the thinning of the optical pickup 8. Further, by increasing the divergence angle by the concave lens 53, it is possible to increase the numerical aperture of the collimator lens 15A. When the vertical movement stroke of the collimator lens 15A is the same, larger focal position correction can be performed.

The light beam is collimated by the collimator lens 15 </ b> A and passes through the quarter-wave plate 17. At that time, the polarization changes from linearly polarized light to circularly polarized light.
Then, the light is collected by the objective lens 61, passes through the glass slider 13, and is focused on the recording surface of the optical disc 1A.
The reflected light beam reflected from the recording surface of the optical disc 1A returns to the same optical path as the forward path, and is converted into parallel light again by the objective lens 61. Thereafter, the light passes through the quarter-wave plate 17 again, and this time is returned from circularly polarized light to linearly polarized light. At that time, the linearly polarized light is changed to a linearly polarized light in a direction perpendicular to the previous polarization direction, and is a polarization direction passing through the 45-degree plane of BS28.
The light that has passed through the 45 degree plane of BS 28 is refracted by the refractive index of the glass and projected onto PD 29. Of the light guided to the PD 29, the light reflected by the lower surface of the BS 28 is reflected, reflected again by the upper surface of the BS 28, and projected onto another PD 30.
This optical system is designed to focus on the top surface reflection of the BS 28 when the recording surface of the optical disc 1A is just in focus. At that time, the two spots of light projected on the two PDs 28 and 30 have the same amount of light.
Each of the two PDs 28 and 30 is divided into four parts, and can be used for focus and tracking error detection. Incidentally, the error detection method used in this embodiment is a method in which the focus is the spot size method and the tracking is the push-pull method.

Next, tracking servo and focus servo will be described.
In this embodiment, the tracking servo is realized by driving the swing arm 5 by a swing motor 105 made of a voice coil motor, and is widely used in HDDs.
On the other hand, with respect to the focus servo, disk surface run-out tracking is performed by a flying slider that is generally employed in HDDs.
As the optical disk 1A rotates, the air in the vicinity of the optical disk 1A also rotates at the same time and enters between the flying slider 13 and the optical disk 1A. The levitation slider 13 obtains a levitation force by the pressure of the air, and maintains a certain levitation amount when it is just balanced with the load by the first arm 18.
In this embodiment, the flying height is designed to be about 0.1 μm to 1 μm. However, the flying height is changed due to a change in the linear velocity of the optical disc 1A, an angular deviation of the flying slider 13 with respect to the track, and a surface runout of the optical disc 1A. Fluctuates, and the focal position focused by the objective lens 61 fluctuates. Further, the focal position accuracy of the objective lens 61 itself and the mechanical accuracy of the flying slider 13 are factors that shift the focal position.
Furthermore, the data recording layer of the optical disc 1A is not located on the surface of the optical disc 1A, but is covered with a cover coat layer (protective film layer). Therefore, when recording / reproducing signals, the thickness error of the cover coat layer also causes defocusing.
The cover coat layer not only protects the data recording layer but also has a role of making it difficult for recording / reproducing errors to occur due to dust and scratches on the surface of the optical disc 1A, and is essential for the optical disc 1A.
In the case of this embodiment, the cover coat layer has a thickness of about 20 μm and is formed by a spin coat method. Although it depends on the disc diameter, unevenness of thickness of about 5 μm to 10 μm or less occurs on the inner periphery to the outer periphery of the disc. Even within one round, thickness unevenness of about 1 μm or less occurs.
If the total of these various focus errors is within the focal depth of the laser spot, the focus servo can be covered only by the flying slider, but it is impossible. For example, the depth of focus of a CD (compact disc) optical system is only ± 1 μm, and the total of various focus errors exceeds the depth of focus.
Therefore, another means capable of correcting the above-described variation in the focus error is necessary. In the present embodiment, this means is realized by the collimator lens / actuator unit 74.
As shown in FIG. 11, by moving the collimator lens 15A in the optical axis direction by the focusing actuator 90, the focal position condensed by the objective lens 61 can be moved, and the fluctuation of the focus error can be corrected.
The amount of movement of the focal position is determined by the numerical aperture of the objective lens 61 and the numerical aperture of the collimator lens 15A. In this embodiment, the numerical aperture of the objective lens 61 is about 0.9, and the numerical aperture of the collimator lens 15A is about 0.3. From this calculation, in order to move the focal position by 1 μm, the amount of movement of the collimator lens is about 8 μm.

As shown in FIGS. 1 and 13, a ramp load 9 is disposed in the vicinity of the outer periphery of the optical disc 1A mounted on the turntable 3A.
The ramp load 9 engages with the engagement piece 64 when the tip of the swing arm 5 moves away from the optical disc 1A mounted on the turntable 3A in the radial direction of the optical disc 1A by swinging of the swing arm 5. Thus, the guide arm 9002 is provided so that the tip of the first arm 18 is elastically deformed and the flying slider 13 is positioned away from the optical disc 1A in the thickness direction of the optical disc 1A.
As shown in FIG. 3, the engagement piece 64 is provided at a location located in a direction away from the optical disc 1 </ b> A with respect to the location of the first arm 18 to which the flying slider 13 is attached, and the guide surface 9002 of the ramp load 9. It is comprised so that engagement is possible.
In the present embodiment, the first arm 18 has a suspension / load beam 62 (corresponding to the main body of the claims) provided with the objective lens 61 and the flying slider 13, and the tip of the suspension / load beam 62. A bent piece 67 that is bent from the tip portion and extends away from the optical disc 1A in the thickness direction of the optical disc 1A is provided, and an engaging piece 64 is provided at the tip of the bent piece 67.
In this embodiment, the first arm 18, that is, the suspension load beam 62 has a width in a direction perpendicular to the length of the first arm 18, as shown in FIG. The piece 67 is provided so as to extend on an imaginary line L passing through the center in the width direction when viewed in plan.
In the present embodiment, the distance between the first arm 18 and the engagement piece 64 in the thickness direction of the optical disc 1A is set so that the distance between the optical disc 1A and the ramp load 9 is closest when the lamp is loaded. And the optical disc 1A are set so as not to contact each other.

As shown in FIG. 13, the swing arm 5 is swung around the support shaft portion 6 by the action of the voice coil motor. As shown in FIG. 12, the swing arm 5 has the flying slider 13 of the optical disk 1A. The load position (A) located on the area of the recording surface and the floating slider 13 are oscillated from the outer periphery of the optical disc 1A to the unload position (B) separated from the outer circumference in the radial direction of the optical disc 1A.
When the swing arm 5 is swung from the load position (A) toward the unload position (B) in a state where the optical disk 1A is rotated by the spindle motor 3, the engagement piece 64 of the ramp load 9 is moved. Engage with guide surface 9002.
When the swing arm 5 is further swung in this state, the engagement piece 64 is moved along the inclination of the guide surface 9002 while being engaged with the guide surface 9002.
As a result, the first arm 18 is elastically deformed in a direction away from the optical disk 1A in the thickness direction of the optical disk 1A, and the flying slider 13 is moved in a direction away from the surface of the optical disk 1A.
When the swing arm 5 reaches the unloading position (b), the flying slider 13 moves away from the outer periphery of the optical disc 1A in the radial direction of the optical disc 1A, and away from the optical disc 1A in the thickness direction of the optical disc 1A from the optical disc 1A. Located in the place.
In this state, the first arm 18 is biased in a direction approaching the optical disc 1A in the thickness direction of the optical disc 1A.
In the state where the swing arm 5 is located at the unload position (b), the swing arm 5 is retracted from the movement locus of the disc cartridge 1, so that the disc cartridge 1 is attached to and detached from the optical disc device 100, that is, the optical disc. It is possible to attach 1A to the turntable 3A and to remove the optical disc 1A from the turntable 3A.

Next, the function and effect will be described.
As shown in FIG. 14, when the disc cartridge 1 is mounted on the optical disc apparatus 100, the posture of the optical disc 1A inside the cartridge 2 is not determined until it is chucked on the turntable 3A. In FIG. 14, reference numeral 2A denotes an opening of the cartridge 2.
However, in the present embodiment, the engagement piece 64 is provided at a location located in a direction away from the optical disc 1A with respect to the location of the first arm 18 to which the flying slider 13 is attached. The surface 9002 can be disposed at a position away from the optical disc 1A in the thickness direction of the optical disc 1A.
For this reason, the guide surface 9002 of the ramp load 9 is positioned at a position away from the optical disc 1A in the thickness direction of the optical disc 1A, so that the contact between the ramp load 9 and the optical disc 1A can be reliably avoided.
Therefore, according to the present embodiment, the engagement piece 64 is provided in a simple configuration in which the engagement piece 64 is provided at a location away from the location of the first arm 18 provided with the flying slider 13 in the thickness direction of the optical disc 1A. Contact between 1A and the lamp load 9 can be reliably avoided.
In the present embodiment, the engagement piece 64 is provided so as to extend on a virtual line passing through the center of the first arm 18 in the width direction, and more specifically, the engagement piece 64 and the bending piece 67. Is provided so as to extend on an imaginary line passing through the center of the first arm 18 in the width direction, so that the first arm 18 is subjected to a force received from the guide surface 9002 when engaged with the guide surface 9002 of the ramp load 9. Does not give torsional torque.
Accordingly, the first arm 18 is twisted by the torque of torsion, and the flying slider 13 is loaded / unloaded with respect to the optical disc 1A in an inclined posture, and the flying slider 13 and the optical disc 1A collide with each other or come into contact with each other. This is advantageous in avoiding occurrence of problems such as damage or head crash.
In this embodiment, when the engagement piece 64 is provided, a bent piece 67 is provided at the tip of the suspension / load beam 62 of the first arm 18, and the engagement piece 64 is provided using the bent piece 67. Therefore, the engagement piece 64 positioned away from the optical disk 1A can be easily formed integrally with the suspension load beam 62 with respect to the position of the suspension load beam 62 to which the flying slider 13 is attached, thereby reducing the manufacturing cost. This is advantageous.

Next, the present embodiment will be described in comparison with a comparative example.
FIG. 15 is an explanatory diagram of the load / unload operation in the comparative example 1, and FIG. 16 is an explanatory diagram showing the positional relationship between the optical disc 1A and the ramp load 9 in the comparative example 1. In the following description, the same parts and members as those in the first embodiment are denoted by the same reference numerals.
As shown in FIG. 15, in Comparative Example 1, the engagement piece 64 is provided at the same location in the thickness direction of the optical disc 1A with respect to the location of the first arm 18 where the flying slider 13 is provided.
Therefore, since the guide surface 9002 of the ramp load 9 is disposed at a position close to the optical disc 1A, the ramp load 9 and the optical disc 1A may come into contact with the disc cartridge 1 as shown in FIG. .
On the other hand, in the first embodiment, the engagement piece 64 is provided at a location away from the location of the first arm 18 where the flying slider 13 is provided in the thickness direction of the optical disc 1A. The guide surface 9002 can be disposed at a position away from the optical disc 1A in the thickness direction of the optical disc 1A. For this reason, since the guide surface 9002 of the ramp load 9 is located at a position away from the optical disc 1A in the thickness direction of the optical disc 1A, contact between the optical disc 1A and the ramp load 9 can be avoided, which is advantageous in this respect. It is.

FIG. 17 is an explanatory diagram showing the positional relationship between the optical disc 1A and the ramp load 9 in the second comparative example.
As shown in FIG. 17, in the comparative example 2, the ramp load 9 is configured to be movable in the radial direction of the optical disc 1A, so that the ramp load 9 can be retracted away from the optical disc 1A when the disc cartridge 1 is mounted. Then, contact between the ramp load 9 and the optical disc 1A is avoided, and after the optical disc 1A is mounted on the turntable 3A, the ramp load 9 is moved in a direction approaching the optical disc 1A.
However, in order to move the ramp load 9 in the radial direction of the optical disc 1A, it is necessary to provide a feeding unit such as a motor, which is complicated and costly, occupies space, and costs. There are disadvantages in reducing and reducing the size.
On the other hand, in the first embodiment, the engagement piece 64 is provided at a location away from the location of the first arm 18 where the flying slider 13 is provided in the thickness direction of the optical disc 1A. The guide surface 9002 can be disposed at a position away from the optical disc 1A in the thickness direction of the optical disc 1A. For this reason, since the guide surface 9002 of the ramp load 9 is located at a position away from the optical disc 1A in the thickness direction of the optical disc 1A, the contact between the optical disc 1A and the ramp load 9 can be avoided, and the configuration is simple. There is no cost and less space is required, which is advantageous for cost reduction and miniaturization.

FIG. 18 is an explanatory diagram showing the positional relationship between the optical disc 1A and the ramp load 9 in the third comparative example.
As shown in FIG. 18, in Comparative Example 3, the engagement piece 64 is located at the same position in the thickness direction of the optical disc 1A with respect to the position of the first arm 18 provided with the flying slider 13, and the first arm. It is provided at a location separated by a predetermined distance D in a direction orthogonal to the central axis extending through the center in the width direction of 18 and extending in the length direction.
In this case, the ramp load 9 can be separated from the outer circumference of the optical disc 1A by a predetermined distance D from the outer periphery of the optical disc 1A as compared with the case of the comparative example 1, so that the ramp load 9 and the optical disc 1A can be mounted when the disc cartridge 1 is mounted. Can be avoided.
However, since the engaging piece 64 is located at a position separated by a predetermined distance D in the direction orthogonal to the central axis of the first arm 18, the torque received by the ramp load 9 causes the torsion torque to the first arm 18. Will be given. Due to the torque, the first arm 18 is twisted, and it is necessary to load / unload the optical disk 1A with the flying slider 13 tilted.
Therefore, in Comparative Example 3, since the flying slider 13 is loaded / unloaded in a tilted posture, the flying slider 13 and the optical disc 1A are likely to collide with each other, and there is a possibility of causing a scratch or causing a head crash.
On the other hand, in the first embodiment, the engagement piece 64 and the bending piece 67 are provided so as to extend on an imaginary line L passing through the center of the first arm 18 in the width direction. This is advantageous in that no torque is generated, and it is possible to reliably avoid problems such as damage due to collision or contact between the flying slider 13 and the optical disc 1A, or head crash.

In this embodiment, the optical disk apparatus that performs recording and / or reproduction with respect to the optical disk to be loaded and unloaded has been described. However, the present invention provides a magnetic field that performs recording and / or reproduction with respect to the magnetic disk to be loaded and unloaded. Of course, the present invention can also be applied to a disk device. In this case, the magnetic disk device is configured as follows.
A magnetic disk device includes a turntable that detachably holds a magnetic disk and rotates while holding the magnetic disk, and a swing arm that is swingable in a radial direction of the magnetic disk mounted on the turntable And a magnetic head that is provided at the tip of the swing arm and records and / or reproduces information with respect to the rotating magnetic disk.
The swing arm has a length and is elastically deformable in the thickness direction of the magnetic disk. The magnetic head is provided at the front end of the length direction, and a floating slider is provided. An engagement piece for elastically deforming the tip of the arm in the thickness direction of the magnetic disk is provided.
The swing arm engages with the engagement piece when the swing arm swings away from the magnetic disk mounted on the turntable in the radial direction of the magnetic disk. A ramp load is provided having a guide surface that elastically deforms the tip portion of the magnetic disk and positions the flying slider away from the magnetic disk in the thickness direction of the magnetic disk.
The engaging piece is provided at a location away from the location of the swing arm provided with the flying slider in the thickness direction of the magnetic disk.

1 is an exploded perspective view illustrating a configuration of an optical disc device according to a first embodiment. It is a block diagram which shows the control system of an optical disk apparatus. It is a perspective view of a rocking arm. It is the disassembled perspective view which looked at the swing arm from the top. It is the disassembled perspective view which looked at the rocking arm from the lower part. It is a disassembled perspective view of OP base part. It is a disassembled perspective view of a collimator lens actuator part. It is a disassembled perspective view of a slider suspension part. It is a principle diagram of an optical system. It is explanatory drawing which shows the manufacturing method of a lens plate. It is a principle diagram of focal position correction by a collimator lens. 3 is a plan view of the first arm 18. FIG. It is explanatory drawing of the load / unload operation | movement in Example 1. FIG. 6 is an explanatory diagram showing a positional relationship between an optical disc 1A and a ramp load 9 in Embodiment 1. FIG. 10 is an explanatory diagram of a load / unload operation in Comparative Example 1. FIG. 6 is an explanatory diagram showing a positional relationship between an optical disc 1A and a ramp load 9 in Comparative Example 1. FIG. 10 is an explanatory diagram showing a positional relationship between an optical disc 1A and a ramp load 9 in Comparative Example 2. FIG. 10 is an explanatory diagram showing a positional relationship between an optical disc 1A and a ramp load 9 in Comparative Example 3. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1A ... Optical disk, 3A ... Turntable, 5 ... Swing arm, 8 ... Optical pick-up, 9 ... Lamp load, 9002 ... Guide surface, 13 ... Flying slider, 18 ... First arm, 54 ... engagement piece, 100 ... optical disk device.

Claims (7)

A turntable that detachably holds an optical disc and rotates while holding the optical disc;
A swing arm provided so as to be swingable in a radial direction of the optical disc mounted on the turntable;
A light beam provided at the tip of the oscillating arm is irradiated with a light beam for recording and / or reproducing information on the rotating optical disk, and the reflected light beam is reflected by the reflected light of the irradiated light beam on the optical disk. And an optical pickup for detecting
The swing arm is composed of a plurality of arms that are stacked in the thickness direction of the optical disc mounted on the turntable and swing integrally.
The arm located closest to the optical disc among the plurality of arms constituting the swing arm is a first arm provided with an objective lens constituting a part of the optical pick arp,
The first arm has a length and can be elastically deformed in the thickness direction of the optical disc, and the objective lens and the flying slider are provided at the tip in the length direction, and the first arm An engagement piece for elastically deforming the tip of the optical disc in the thickness direction of the optical disc is provided,
When the tip of the swing arm moves away from the optical disc mounted on the turntable in the radial direction of the optical disc by the swing of the swing arm, the tip of the first arm is engaged with the engagement piece. A ramp load having a guide surface that elastically deforms the portion and positions the flying slider at a location away from the optical disc in the thickness direction of the optical disc,
The engagement piece is provided at a location away from the location of the first arm provided with the flying slider in the thickness direction of the optical disc.
An optical disc device characterized by the above.   The first arm has a main body piece on which the objective lens and the flying slider are provided. The first arm is bent from the front portion of the main body piece and extends in a direction away from the optical disc in the thickness direction of the optical disc. 2. The optical disc apparatus according to claim 1, wherein an existing bent piece is provided, and the engaging piece is provided at a tip of the bent piece.   The first arm has a width in a direction perpendicular to the length, and the engagement piece is provided so as to extend on an imaginary line passing through a center in the width direction. 1. The optical disc device according to 1.   The first arm has a main body piece on which the objective lens and the flying slider are provided. The first arm is bent from the front portion of the main body piece and extends in a direction away from the optical disc in the thickness direction of the optical disc. Existing bending pieces are provided, the engaging pieces are provided at the ends of the bending pieces, the first arm has a width in a direction perpendicular to the length, and the engaging pieces and the bending pieces are 2. The optical disk apparatus according to claim 1, wherein the optical disk apparatus is provided so as to extend on an imaginary line passing through the center in the width direction.   2. The optical disc apparatus according to claim 1, wherein the objective lens is provided on the flying slider.   The swing arm is composed of three arms that are stacked in the thickness direction of the optical disk mounted on the turntable and swings integrally. The second arm is stacked on the side away from the optical disk of the first arm. A collimator lens that constitutes a part of the optical pickup is attached to the arm, and a light source that constitutes a part of the optical pickup is attached to the third arm that is superimposed on the side of the second arm away from the optical disk. 2. The optical disc apparatus according to claim 1, wherein a light receiving element is attached. A turntable that detachably holds the magnetic disk and rotates while holding the magnetic disk;
A swing arm provided so as to be swingable in the radial direction of the magnetic disk mounted on the turntable;
A magnetic head provided at the tip of the swing arm and for recording and / or reproducing information with respect to the rotating magnetic disk;
The swing arm has a length and is elastically deformable in the thickness direction of the magnetic disk. The magnetic head is provided at the front end of the length direction, and a floating slider is provided. An engagement piece for elastically deforming the tip of the arm in the thickness direction of the magnetic disk is provided,
The swing arm engages with the engagement piece when the swing arm swings away from the magnetic disk mounted on the turntable in the radial direction of the magnetic disk. A ramp load having a guide surface for elastically deforming the tip of the magnetic disk and positioning the flying slider away from the magnetic disk in the thickness direction of the magnetic disk,
The engagement piece is provided at a location away from the location of the swing arm provided with the flying slider in the thickness direction of the magnetic disk.
A magnetic disk device characterized by the above.

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