WO2009119152A1

WO2009119152A1 - Information recording device and arm mechanism

Info

Publication number: WO2009119152A1
Application number: PCT/JP2009/051341
Authority: WO
Inventors: 裕昭上田
Original assignee: コニカミノルタオプト株式会社
Priority date: 2008-03-27
Filing date: 2009-01-28
Publication date: 2009-10-01
Also published as: JPWO2009119152A1; JP4400697B2

Abstract

A mechanism, which includes a plurality of light sources and a plurality of recording heads, and a recording/reproducing device are reduced in thickness, while arranging the light sources and the recording heads with spaces in between and highly accurately arranging the light sources. First and second arm sections are arranged by sandwiching a first recording medium, and the first and the second arm sections are connected by a rotating shaft on one side of each arm section. The first slider section includes a recording head and is arranged to face one main surface of the first recording medium on the other end side of the first arm section. The second slider section includes a recording head and is arranged to face the other main surface of the first recording medium on the other end side of the second arm section. Furthermore, in a light source unit arranged at a position not in contact with the first recording medium, a light source, which outputs a luminous flux for irradiating the first slider section, and a light source, which outputs a luminous flux for irradiating the second slider section are integrally formed between the first arm section and the second arm section.

Description

Information recording apparatus and arm mechanism

The present invention relates to an information recording apparatus and an arm mechanism used therefor, for example, an optically assisted magnetic recording apparatus using a magnetic field and light for information recording, and an arm mechanism used therefor.

In the magnetic recording method, when the recording density is increased, the magnetic bit is significantly affected by the external temperature. For this reason, a recording medium having a high holding force is required. However, when such a recording medium is used, a magnetic field required for recording increases. The upper limit of the magnetic field generated by the recording head is determined by the saturation magnetic flux density, but this value is approaching the material limit and cannot be expected to increase dramatically. Therefore, there is a system that guarantees the stability of the recorded magnetic bit by locally heating at the time of recording, causing magnetic softening, recording in a state where the holding force is small, and then stopping the heating and naturally cooling. Proposed. This method is called a heat-assisted magnetic recording method.

In this heat-assisted magnetic recording system, it is desirable to instantaneously heat the recording medium, and the heating mechanism and the recording medium are not allowed to contact each other. For this reason, heating is generally performed using absorption of light, and a method using light for heating is called a light assist method. As an optically assisted magnetic recording head, an optical head portion having a planar waveguide with a condensing function and a magnetic head portion for performing magnetic recording on a portion irradiated with light emitted from the optical head portion are provided. Have been proposed (eg, US Pat. No. 6,944,112).

Also, in order to perform ultra-high density recording by the optical assist method, it is necessary to make the spot diameter of the light irradiating the recording medium very small, for example about 20 nm. However, in a normal optical system, it is difficult to condense light to an extremely minute one due to the presence of a diffraction limit. Thus, a method of heating using so-called near-field light that is non-propagating light has been proposed (for example, Sharp Technical Bulletin No. 91, pages 26-30). Various other proposals have been made for optical heads and recording / reproducing apparatuses that generate near-field light (for example, Japanese Patent Laid-Open Nos. 2000-149317 and 2000-353336).

However, in the technique proposed in the above-mentioned US Pat. No. 6,944,112 and Sharp Technical Bulletin No. 91, pp. 26-30, the arrangement of the light source and the method of guiding the light beam to the head are not clear. Further, in the technique proposed in the above Japanese Patent Laid-Open No. 2000-149317, since the light source is mounted on the optical head, there is a risk that the recording accuracy may decrease due to thermal expansion of the optical head due to heating of the light source. The introduction of light from an oblique direction and the arrangement of a complicated condensing optical system lead to an increase in the size of the optical head.

In a recording apparatus, it is necessary to arrange a recording disk, a recording head, etc. in a narrow space, and it is not preferable to increase the size of the recording head. In particular, in the magnetic recording method, when a large amount of information is recorded at a high density, it is required to arrange a plurality of recording disks in a narrow space separated from each other by a minute distance (for example, 1 mm or less). In such a case, the thickness of the recording head is limited. In the technique proposed in Japanese Patent Laid-Open No. 2000-353336, the optical system for guiding the light beam from the light source to the recording head is complicated, and the recording disk and the recording head cannot be arranged in a narrow space. . Such a problem becomes prominent in a recording / reproducing apparatus having a plurality of light sources and a plurality of recording heads.

The present invention has been made in view of the above-described problems. A plurality of light sources and a plurality of recording heads are arranged with high accuracy while arranging a plurality of light sources and a plurality of recording heads apart from each other. It is an object of the present invention to provide a technique capable of reducing the thickness of a mechanism including a head and a recording / reproducing apparatus.

In order to solve the above-described problem, an information recording apparatus according to a first aspect includes a first recording medium, first and second arm portions arranged with the first recording medium interposed therebetween, and the first and second arms. A rotation shaft that connects the first and second arm portions on one end side of the arm portion and a recording head, and faces the one main surface of the first recording medium on the other end side of the first arm portion. A first slider portion provided on the other end side of the second arm portion, the second slider portion provided opposite to the other main surface of the first recording medium, and the first slider portion. A first light source provided at a position not in contact with the recording medium, and emitting a first light beam for irradiating the first slider portion between the first arm portion and the second arm portion; Second light that emits a second light beam for irradiating the slider portion DOO comprises a light source unit being formed integrally.

Accordingly, the plurality of light sources and the plurality of recording heads are spaced apart from each other, and the recording / reproducing apparatus including the plurality of light sources and the plurality of recording heads is thinned while arranging the plurality of light sources with high accuracy. be able to.

The information recording apparatus according to the second aspect is the information recording apparatus according to the first aspect, in which the light source unit is attached to the first and second arm portions.

The information recording apparatus according to the third aspect is the information recording apparatus according to the first or second aspect, and is disposed substantially parallel to the first recording medium with the second arm portion interposed therebetween. A second recording medium including a recording head, and a third slider portion provided on the other end side of the second arm portion so as to face one main surface of the second recording medium, The light source unit further includes a third light source disposed through the second arm portion and emitting a third light flux for irradiating the third slider portion.

This makes it possible to arrange three or more light sources with high accuracy.

The information recording apparatus according to the fourth aspect is the information recording apparatus according to any one of the first to third aspects, wherein the light source unit corresponds to each of the light sources, and an optical lens unit corresponds to each of the light sources. It is formed integrally.

Thereby, the optical system can be easily and accurately arranged on the optical path from each light source to each slider portion.

Further, the arm mechanism according to the fifth aspect connects the first and second arm portions arranged at substantially parallel to one end side of the first and second arm portions. The second arm portion includes a rotary shaft and a recording head, and includes a first slider portion provided opposite to the second arm portion on the other end side of the first arm portion, and a recording head. For irradiating the first slider portion between the second slider portion provided opposite to the first arm portion, and between the first arm portion and the second arm portion. A light source unit in which a first light source that emits a first light beam and a second light source that emits a second light beam for irradiating the second slider unit are integrally formed;

Accordingly, a plurality of light sources and a plurality of recording heads are spaced apart from each other, and a mechanism including the plurality of light sources and the plurality of recording heads can be thinned while the plurality of light sources are arranged with high accuracy. it can.

The arm mechanism according to the sixth aspect is the arm mechanism according to the fifth aspect, in which the light source unit is attached to the first and second arm portions.

Further, an arm mechanism according to a seventh aspect is the arm mechanism according to the fifth or sixth aspect, includes a recording head, and on the other end side of the second arm part, Is further provided with a third slider portion provided on the opposite side, and the light source unit is disposed through the second arm portion and emits a third light beam for irradiating the third slider portion. It further includes a light source.

An arm mechanism according to an eighth aspect is the arm mechanism according to any one of the fifth to seventh aspects, wherein the light source unit is integrated with an optical lens unit corresponding to each light source. It is formed.

FIG. 1 is a diagram showing a schematic configuration example of an information recording apparatus according to an embodiment of the present invention. FIG. 2 is a diagram illustrating a configuration example of the slider unit according to the embodiment of the present invention. FIG. 3 is a diagram illustrating a configuration example of an optical assist unit having a waveguide. FIG. 4 is a schematic diagram illustrating a configuration example of an arm mechanism according to the embodiment of the present invention. FIG. 5 is a schematic cross-sectional view showing a configuration example of an arm mechanism according to an embodiment of the present invention. FIG. 6 is a schematic diagram illustrating a configuration example of an arm mechanism according to a modified example of the present invention. FIG. 7 is a schematic diagram illustrating a configuration example of an arm mechanism according to a modification of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<Schematic configuration of information recording apparatus>
FIG. 1 is a diagram illustrating a schematic configuration example of an information recording apparatus 100 according to an embodiment of the present invention. In FIG. 1 and the drawings after FIG. 1, three orthogonal XYZ axes are appropriately attached in order to clarify the orientation relationship.

As shown in FIG. 1, the information recording apparatus 100 is configured as a magnetic recording apparatus (optically assisted magnetic recording apparatus) equipped with first to fifth slider portions 31 to 35 including optically assisted magnetic recording heads. For example, it is applied to a hard disk device. The information recording apparatus 100 includes a substantially rectangular parallelepiped casing 1, first to third recording disks (magnetic recording media) 2a, 2b, 2c and an arm mechanism 10 disposed in the casing 1. Yes.

The first to

third recording disks

2a, 2b, and 2c are disk-shaped recording media, and are arranged so as to be separated from each other by a predetermined minute distance (for example, 1 mm or less) and the disk surfaces are substantially parallel to each other. Specifically, the first recording disk 2a, the second recording disk 2b, and the third recording disk 2c are arranged sequentially in this order from above (along the + Z direction to the −Z direction). The housing 1 is rotatably supported by a predetermined rotating shaft and a motor.

The arm mechanism 10 includes first to fifth slider portions 31 to 35, first to third arm portions 41 to 43, a rotating shaft 5, and a light source unit portion 7.

The first to third arm portions 41 to 43 have the same shape, are thin and long, and are arranged substantially parallel to each other. Specifically, the first arm portion 41, the second arm portion 42, and the third arm portion 43 are sequentially arranged in this order from above (along the + Z direction to the −Z direction). The first to third arm portions 41 to 43 are connected to each other by the rotation shaft 5 at one end side (here, the end portion in the −X direction), and in the direction of the arrow mA with the rotation shaft 5 as a fulcrum ( It is supported so as to be rotatable with respect to the housing 1 in the tracking direction). Here, as the rotary shaft 5 is rotated by the actuator 6, the first to third arm portions 41 to 43 rotate in the arrow mA direction with the rotary shaft 5 as a fulcrum.

The first arm part 41 and the second arm part 42 are arranged so as to sandwich the first recording disk 2a, and the second arm part 42 and the third arm part 43 hold the second recording disk 2b. It is arranged so as to sandwich it. From another point of view, the second arm part 42 is arranged so as to be sandwiched between the first recording disk 2a and the second recording disk 2b, and the third arm part 43 is arranged with the second recording disk 2b. It is arranged so as to be sandwiched between the third recording disk 2c.

The first to fifth slider sections 31 to 35 have the same configuration and have an optically assisted magnetic recording head. The first slider portion 31 has one main surface (first main surface) of the first recording disc 2a with respect to the lower surface on the other end side different from the one end side to which the rotary shaft 5 of the first arm portion 41 is connected. Here, the second slider portion 32 is provided so as to face the upper surface), and the second slider portion 32 has the second arm portion 42 with respect to the upper surface on the other end side different from the one end side to which the rotating shaft 5 is coupled. It is provided so as to face the other main surface (here, the lower surface) of one recording disk 2a. Further, the third slider portion 33 has one main surface of the second recording disk 2b (with respect to the lower surface on the other end side different from the one end side to which the rotating shaft 5 of the second arm portion 42 is coupled). Here, the fourth slider portion 34 is arranged to face the upper surface on the other end side different from the one end side to which the rotating shaft 5 of the third arm portion 43 is connected. 2 is provided so as to face the other main surface (here, the lower surface) of the recording disk 2b. Further, the fifth slider portion 35 has one main surface of the third recording disk 2c (with respect to the lower surface on the other end side different from the one end side to which the rotating shaft 5 of the third arm portion 43 is connected). Here, it is provided so as to face the upper surface).

Here, a motor (not shown) for rotating the first to third recording disks 2a to 2c in the direction of the arrow mB is provided in the housing 1, and the first to fifth sliders 31 to 35 are provided in the first direction. 3 It is configured to be able to move relatively while floating on the

recording disks

2a, 2b, 2c (in the direction of arrow mC in FIG. 2).

FIG. 2 is a cross-sectional view showing a configuration example of the first to fifth slider portions 31 to 35. As shown in FIG. 2, the first to fifth slider portions 31 to 35 have recording heads that use light for information recording on the first to third recording disks 2a to 2c. The first to fifth slider portions 31 to 35 are each composed of a substrate 50 made of, for example, ceramic. Inside the substrate 50, there are recorded portions of the first to third recording disks 2a to 2c. In order from the inflow side to the outflow side (arrow mC), an optical assist unit 51, a magnetic recording unit 52, and a magnetic reproducing unit 53 are formed.

The optical assist unit 51 has an optical waveguide for spot heating the recording portions of the first to third recording disks 2a to 2c using near infrared laser light. The structure of the optical waveguide will be described later. And a waveguide 60 (see FIG. 3). The magnetic recording unit 52 is formed of a magnetic recording element that writes magnetic information to the recording portions of the first to third recording disks 2a to 2c. Further, the magnetic reproducing unit 53 is formed by a magnetic reproducing element that reads magnetic information recorded on the first to third recording disks 2a to 2c.

FIG. 3 is a diagram illustrating a configuration example of the optical assist unit 51 having the waveguide 60. As the waveguide 60, for example, the one proposed in Patent Document 1 can be applied. The waveguide 60 has parabolic

inner surfaces

70 and 72 that are thin and have a width that gradually decreases from the top to the bottom. Then, laser light is irradiated to the diffraction grating portion 68 (specifically, a laser irradiation region in the thick broken line portion) disposed on the upper side surface of the waveguide 60, and the laser light is introduced into the waveguide 60. Then, as indicated by a thick arrow 64, the laser beam is reflected by the

inner surfaces

70 and 72, and the laser beam is condensed at the lowermost focal point F of the waveguide 60, and electromagnetic waves are generated toward the recording disks 2a to 2c. As a result, the minute regions of the recording disks 2a to 2c are heated. In FIG. 2, the outer edge of the optical path PR of the laser light applied to the light assist unit 51 is illustrated by a one-dot chain line.

Returning to FIG. 1, the explanation will be continued.

The light source unit 7 is configured by integrally forming a plurality of light sources. Specifically, the light source unit unit 7 is a unit (semiconductor laser unit) in which a plurality of semiconductor laser chips are integrated, and is connected to each waveguide 60 of the first to fifth slider units 31 to 35. First to fifth light source parts P1 to P5 (see FIG. 5) for emitting a light beam for irradiation. The light source unit 7 is disposed through the second and

third arm portions

42 and 43. More specifically, the first to fifth slider portions in the region extending from the first arm portion 41 to the back surface of the third arm portion 43 via the second and

third arm portions

42 and 43 and in the vicinity of the rotating shaft 5. Arranged in the region on the 31-35 side. When the arm mechanism 10 rotates around the rotation shaft 5, the light source unit 7 is positioned so as not to contact the first to third recording disks 2a to 2c. It may be disposed at an arbitrary position between the slider portions 31 to 35.

Hereinafter, the arm mechanism 10 will be described in further detail.

<Arm mechanism>
4 and 5 are schematic views showing a configuration example of the arm mechanism 10 according to the embodiment of the present invention. FIG. 4 is a schematic view of the arm mechanism 10 and its peripheral configuration viewed from above (+ Z direction). In FIG. 4, the light source unit 7, first to fifth optical lens units L1 to L5, and first to The arrangement relationship of the five slider portions 31 to 35 with respect to the first arm portion 41 is schematically shown by a broken line. FIG. 5 is a schematic cross-sectional view of the configuration of the arm mechanism 10 and its periphery as viewed from the side (+ Y direction). 4 and 5, the outer edge of the optical path PR through which the laser light passes is indicated by a one-dot chain line.

The first arm portion 41 includes an arm main body portion 41a and a suspension portion 41b. The arm body 41a is made of a material that is thicker and more rigid than the suspension 41b, and the suspension 41b is made of a flexible material. The arm body 41a and the suspension The extending direction of 41b is substantially the same. One end (−X side end) of the arm main body 41a is fixed to the rotating shaft 5, and the suspension is placed on the lower surface (−Z side surface) of the other end (+ X side end) of the arm main body 41a. The upper surface (the surface on the + Z side) at one end of the portion 41b is connected. The first slider portion 31 is attached to a lower surface in the vicinity of the other end opposite to the one end connected to the arm main body portion 41a of the suspension portion 41b via a predetermined spring member. .

The first optical lens portion L1 is provided between the light source unit portion 7 and the first slider portion 31 and on the back surface (the surface in the −Z direction) of the arm main body portion 41a. The first optical lens unit L1 is configured so that a laser beam spot is formed on the diffraction grating unit 68 of the first slider unit 31 with the laser beam emitted from the first light source unit P1 of the light source unit unit 7. It is configured as a lens for guiding (for example, a single lens such as a collimator lens).

The first optical lens portion L1 is fixed to the arm main body 41a with a holder (not shown). For example, when the diameter of the light emitting point in the first light source part P1 is about 1 μm, which is the general diameter of the first optical lens part L1, the laser irradiation region on the diffraction grating part 68 (in the broken line part in FIG. 3). The laser light spot having a diameter of about 50 μm is set on the diffraction grating portion 68. If the accuracy of the position where the laser beam spot is formed on the diffraction grating unit 68 can be increased, the design of the first optical lens unit L1 is changed, for example, a 1 μm laser beam spot. May be formed on the diffraction grating portion 68. The second to fifth optical lens portions L2 to L5 have the same configuration as that of the first optical lens portion L1.

Note that the same configuration as the first light source unit P1, the first optical lens unit L1, and the first slider unit 31 arranged in this manner is applied to the other second arm unit 42 and the third arm unit 43. Has been placed. The description will continue in this regard.

The second arm portion 42 includes an arm main body portion 42a, an upper suspension portion 42b, and a lower suspension portion 42c, and the extending directions of the arm main body portion 42a, the upper suspension portion 42b, and the lower suspension portion 42c are substantially the same. Then, one end (−X side end) of the arm main body 42a is fixed to the rotating shaft 5, and the upper suspension is placed on the upper surface (+ Z side surface) of the other end (+ X side end) of the arm main body 42a. The lower surface of one end of the portion 42b (the surface on the −Z side) is coupled, and the lower surface (the surface on the −Z side) of the other end of the arm main body portion 42a (the surface on the −Z side) is connected to the upper surface of one end of the lower suspension portion 42c ( + Z side surfaces) are connected. The second slider portion 32 is attached to the upper surface of the upper suspension portion 42b near the other end opposite to the one connected to the arm main body portion 42a via a predetermined spring member. Yes. Further, the third slider portion 33 is attached to a lower surface in the vicinity of the other end opposite to one end of the lower suspension portion 42c connected to the arm main body portion 42a via a predetermined spring member. Yes.

The third arm portion 43 includes an arm main body portion 43a, an upper suspension portion 43b, and a lower suspension portion 43c, and the extending directions of the arm main body portion 43a, the upper suspension portion 43b, and the lower suspension portion 43c are substantially the same. One end (−X side end) of the arm main body 43a is fixed to the rotary shaft 5, and the upper suspension is placed on the upper surface (+ Z side surface) of the other end (+ X side end) of the arm main body 43a. The lower surface of one end of the portion 43b (the surface on the −Z side) is connected, and the upper surface of one end of the lower suspension portion 43c (the surface on the −Z side) is connected to the lower surface (the surface on the −Z side) of the other end of the arm main body portion 43a. + Z side surfaces) are connected. The fourth slider portion 34 is attached to the upper surface of the upper suspension portion 43b near the other end opposite to the one connected to the arm body portion 43a via a predetermined spring member. Yes. Further, the fifth slider portion 35 is attached to a lower surface in the vicinity of the other end opposite to one end of the lower suspension portion 43c connected to the arm main body portion 43a via a predetermined spring member. Yes.

The light source unit section 7 is formed by forming five point light sources (first to fifth light source sections P1 to P5) on an integral wafer, and the arm main body sections 41a to 43a of the first to third arm sections 41 to 43. Are attached and fixed by an L-shaped holding member. Specifically, the light source unit 7 is fixedly installed at a position near the rotation shaft 5 of the first to third arm portions 41 to 43 and on the other end side (+ X side in FIG. 5) of the rotation shaft 5. Yes. The light source unit 7 has one end abutting against the lower surface of the arm main body 41a of the first arm 41, and the through-hole C1 and the third arm provided in the arm main body 42a of the second arm 42. 43 penetrates through the through hole C2 provided in the arm main body 43a, and the other end is disposed below the arm main body 43a.

In the light source unit 7, first to fifth light source parts P1 to P5 are integrally formed on a surface facing the first to fifth slider parts 31 to 35. More specifically, the first light source part P1 is provided at a position facing the first slider part 31, the second light source part P2 is provided at a position facing the second slider part 32, and faces the third slider part 33. A third light source P3 is provided at a position facing the fourth slider 34, a fourth light source P4 is provided at a position facing the fourth slider 34, and a fifth light source P5 is provided at a position facing the fifth slider 35. Yes. Here, the first slider part 31 is arranged on a straight line extending from the first light source part P1 along the extending direction of the first arm part 41, and extends from the second light source part P2 to the extending direction of the second arm part 42. The second slider portion 32 is disposed on a straight line extending along the second light source portion. The third slider portion 32 is disposed on a straight line extending along the extending direction of the second arm portion 42 from the third light source portion P3. The fourth slider part 34 is arranged on a straight line extending from the P4 along the extending direction of the third arm part 43, and the fourth slider part 34 is arranged on the straight line extending from the fifth light source part P5 along the extending direction of the third arm part 43. Five slider portions 35 are arranged.

In addition, the arrangement interval of the first to fifth light source units P1 to P5 in the light source unit unit 7 is set to match the arrangement interval of the first to fifth slider units 31 to 35, for example, the same interval. ing. The accuracy of the interval between the first to fifth light source parts P1 to P5 can be high enough to correspond to the so-called photolithography positioning precision used in the semiconductor laser manufacturing process. For example, the light source unit 7 may be formed such that a layer necessary for light emission is appropriately stacked on a wafer and light is emitted from an end surface by cutting a desired position.

Then, the laser light emitted from the first light source part P1 is irradiated so as to be condensed on the first slider part 31 via the first optical lens part L1 provided on the lower surface of the arm body part 41a, and the second light source. Laser light emitted from the part P2 is irradiated so as to be condensed on the second slider part 32 via the second optical lens part L2 provided on the upper surface of the arm main body part 42a. Further, the fourth light source is irradiated with the laser light emitted from the third light source part P3 so as to be condensed on the third slider part 33 via the third optical lens part L3 provided on the lower surface of the arm main body part 42a. Laser light emitted from the portion P4 is irradiated so as to be condensed on the fourth slider portion 34 via a fourth optical lens portion L4 provided on the upper surface of the arm main body portion 43a. Further, the laser light emitted from the fifth light source part P5 is irradiated so as to be condensed on the fifth slider part 35 via the fifth optical lens part L5 provided on the lower surface of the arm main body part 43a.

Regarding the configuration of the light source unit section 7, from another viewpoint, the light source unit section 7 is fixed to the first and

second arm sections

41 and 42 at a position not in contact with the first recording disk 2a. ing. The first light source part P1 that emits a light beam for irradiating the first slider part 31 and the second light source part P2 that emits a light beam for irradiating the second slider part 32 are It is disposed between the first and

second arm portions

41, 42. The light source unit portion 7 is fixed to the second and

third arm portions

42 and 43 at a position where the light source unit portion 7 does not contact the second recording disk 2b. A third light source part P3 that emits a light beam for irradiating the third slider part 33 and a fourth light source part P4 that emits a light beam for irradiating the fourth slider part 34 are The second and

third arm portions

42 and 43 are disposed. Further, the light source unit portion 7 is disposed through the third arm portion 43, and emits a light beam for irradiating the fifth slider portion 35 disposed above the third recording disk 2c. It has the light source part P5.

As described above, in the information recording apparatus 100 according to the embodiment of the present invention, a plurality of light sources (here, the first to fifth light source units P1 to P5) are integrally arranged (here, on one wafer). And a plurality of arm portions (here, first to third arm portions 41 to 43) that hold a plurality of slider portions (here, first to fifth slider portions 31 to 35). In contrast, the light source unit 7 is fixed on the end side opposite to the end side on which the slider portion is disposed. And between two arm parts (for example, the 1st and 2nd arm parts 41 and 42), two light source parts (for example, the 1st and 2nd light source parts P1, P2) and two slider parts (for example, The first and second slider portions 31, 32) are arranged so as to face each other. For this reason, the arm mechanism 10 and the information recording apparatus 100 including a plurality of light sources and a plurality of recording heads are arranged with a plurality of light sources and a plurality of recording heads spaced apart from each other and with a plurality of light sources arranged with high accuracy. Can be made thinner.

Further, by adopting the light source unit portion 7 formed integrally with (here, on one wafer) a plurality of light sources (here, the first to fifth light source portions P1 to P5), the light source unit The interval between the plurality of light sources (here, the first to fifth light source units P1 to P5) in the unit 7 is matched with the interval between the plurality of slider units (here, the first to fifth slider units 31 to 35) with high accuracy. Can easily be. For this reason, the setting of the optical path in the arm mechanism 10 and the information recording apparatus 100 can be made highly accurate.

In addition, since the light source unit 7 is disposed through the arm portions (here, the second and third arm portions 42 and 43), three or more light sources (here, the first to fifth light source portions P1). To P5) can be arranged with high accuracy.

<Modification>
It should be noted that the present invention is not limited to the above-described embodiment, and various changes and improvements can be made without departing from the gist of the present invention.

For example, in the above embodiment, the first to fifth optical lens portions L1 to L5 are arranged on the straight lines connecting the first to fifth light source portions P1 to P5 and the first to fifth slider portions 31 to 35 of the light source unit portion 7, respectively. Although each was arranged, it is not restricted to this. For example, as long as the laser light emitted from the first to fifth light source parts P1 to P5 is irradiated so as to be condensed on the first to fifth slider parts 31 to 35, various other modes are adopted. Also good.

Specifically, as shown in FIG. 6, the laser light emitted from each light source unit of the light source unit unit 7A is reflected by each reflection unit M1 to M5, and passes through each optical lens unit L1 to L5. Alternatively, the sliders 31 to 35 may be irradiated so as to be condensed. Further, as shown in FIG. 7, the laser light emitted from each light source part of the light source unit part 7A is reflected by each reflecting part (condensing mirror) M11 to M15 having a concave surface, and each slider part 31 is reflected. It is also possible to irradiate the light so that it is focused on ~ 35. Note that, when the condensing mirrors M11 to M15 are used, the first to fifth optical lens portions L1 to L5 are not necessary, so that the configuration and the manufacturing process can be simplified.

In the above embodiment, the first to fifth light source parts P1 to P5 of the light source unit part 7 perform point emission, but the present invention is not limited to this. For example, a so-called surface emitting laser such as a VCSEL may be applied to the first to fifth light source units P1 to P5. When a surface emitting laser is applied, a microlens that covers each of the light source units P1 to P5 can be integrated in the light source unit unit 7. As described above, when the light source unit part in which the optical lens part is integrally formed with each of the light source parts P1 to P5 is employed, the process of separately arranging the optical lens part with high accuracy becomes unnecessary. Therefore, the optical system can be easily and accurately arranged on the optical path from each light source to each slider portion, and the manufacturing process can be simplified.

Also, a so-called photonic crystal laser may be applied to the first to fifth light source parts P1 to P5. In this photonic crystal laser, light whose outer edge is substantially parallel (light whose cross section is substantially constant) is emitted. This eliminates the need for an optical member such as a collimator lens or a condensing mirror for condensing the laser light on the first to fifth slider portions 31 to 35, thereby contributing to simplification of the manufacturing process.

In the above embodiment, the information recording apparatus 100 is configured as an optically assisted magnetic recording apparatus that records and reads information magnetically while applying heat to the recording medium with light. Absent. For example, the present invention is generally applied to information recording apparatuses that record and read information using light irradiation, such as information recording apparatuses that record and read information by irradiating light onto a recording medium without using magnetism. May be.

In the above embodiment, the arm mechanism 10 and the information recording apparatus 100 including the three arm portions 41 to 43 and the five slider portions 31 to 35 have been described. However, the number of arm portions and the slider portion are described. The number of is not limited to this. For example, when there are two recording disks, there are three arm portions and four slider portions, or there are two arm portions and the two arm portions are two. The configuration may be such that there are two slider portions while being sandwiched between two recording disks. In other words, any arm mechanism and information recording apparatus may be used as long as the light source unit portion having two light source portions between the two arm portions is not in contact with the recording disk.

In the above embodiment, the light source unit 7 is attached and fixed to the arm main body portions 41a to 43a of the first to third arm portions 41 to 43 by the L-shaped holding member. Not limited. For example, the light source unit 7 may be fixed to the rotating shaft 5. Even when the light source unit portion 7 is fixed to the rotating shaft 5, the rotating shaft 5 and the arm portions 41 to 43 rotate in conjunction with each other, so that the light flux from the light source unit portion 7 is changed. It is possible to enter the first to fifth slider portions 31 to 35 with high accuracy. Therefore, the light source unit 7 can move in conjunction with the first to third arm portions 41 to 43 so that the relative positional relationship between the light source unit portion 7 and the first to fifth slider portions 31 to 35 is maintained. What is necessary is just to be arrange | positioned.

Claims

A first recording medium;
First and second arm portions disposed across the first recording medium;
A rotating shaft connecting the first and second arm portions on one end side of the first and second arm portions;
A first slider portion including a recording head and provided on the other end side of the first arm portion so as to face one main surface of the first recording medium;
A second slider portion including a recording head and provided on the other end side of the second arm portion so as to face the other main surface of the first recording medium;
A first light source provided at a position not in contact with the first recording medium and emitting a first light beam for irradiating the first slider portion between the first arm portion and the second arm portion; A light source unit integrally formed with a second light source that emits a second light beam for irradiating the second slider portion;
An information recording apparatus comprising:
The information recording apparatus according to claim 1,
The light source unit is
An information recording apparatus, wherein the information recording apparatus is attached to the first and second arm portions.
The information recording apparatus according to claim 1 or 2, wherein
A second recording medium disposed substantially parallel to the first recording medium across the second arm portion;
A third slider portion including a recording head and provided on the other end side of the second arm portion so as to face one main surface of the second recording medium;
Further comprising
The light source unit is
An information recording apparatus, further comprising: a third light source disposed through the second arm portion and emitting a third light beam for irradiating the third slider portion.
An information recording apparatus according to any one of claims 1 to 3,
The light source unit is
An information recording apparatus, wherein an optical lens unit is integrally formed corresponding to each of the light sources.
First and second arm portions arranged substantially in parallel;
A rotating shaft connecting the first and second arm portions on one end side of the first and second arm portions;
A first slider portion that includes a recording head and is provided opposite to the second arm portion on the other end side of the first arm portion;
A second slider portion including a recording head and provided on the other end side of the second arm portion so as to face the first arm portion;
A first light source that emits a first light flux for irradiating the first slider portion between the first arm portion and the second arm portion, and a second light flux for irradiating the second slider portion. A light source unit integrally formed with a second light source for emitting light;
An arm mechanism comprising:
The arm mechanism according to claim 5,
The light source unit is
An arm mechanism attached to the first and second arm portions.
The arm mechanism according to claim 5 or 6,
A third slider part including a recording head and provided on the opposite side of the first arm part on the other end side of the second arm part;
Further comprising
The light source unit is
An arm mechanism further comprising a third light source disposed through the second arm portion and emitting a third light beam for irradiating the third slider portion.
The arm mechanism according to any one of claims 5 to 7,
The light source unit is
An arm mechanism, wherein an optical lens portion is integrally formed corresponding to each of the light sources.