KR20040078514A - Information record/regeneration apparatus having magnetic driving type head - Google Patents

Abstract

PURPOSE: An information recording/reproducing device having a magnetic driving-type head is provided to drive a head in radius direction or thickness direction of a disk according to a magnetic force, thereby. CONSTITUTION: A disk(13) has a recording surface, and is rotatively disposed. A head(17) is disposed on one side of the recording surface. A mount portion(19) is fixed at a spot spaced from the disk(13). One end of an arm(21) is firmly coupled with the head(17), and the other end of the arm(21) is extended toward the mount portion(19) according to a plate surface direction of the disk(13). Magnetic substance portions(23) are formed in sections of the mount portion(19). One end of an elastic supporting portion(25) is coupled with the mount portion(19), and the other end elastically supports the arm(21). The first to fourth magnetic force generators(31a,31b) are spaced at certain intervals.

Description

Information recording / reproducing apparatus with a magnetically driven head {INFORMATION RECORD / REGENERATION APPARATUS HAVING MAGNETIC DRIVING TYPE HEAD}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording / reproducing apparatus having a magnetically driven head, and more particularly, to an information recording / reproducing having a magnetically driven head capable of precisely controlling the position of the head relative to the disc. Relates to a device.

1 is a diagram showing a head area of a conventional information recording / reproducing apparatus. As shown, the information recording / reproducing apparatus includes a base 111 fixedly arranged in a plate shape, a disk 113 rotatably disposed on one side of the base 111, and a thickness direction of the disk 113. The head 115 is disposed on one side and records information on the disk 113 or reproduces the recorded information, and the swing arm 117 is arranged along the plate surface direction of the disk 113 and the head 115 is coupled to one end. And an actuator 121 disposed at an opposite end of the head 115 along the longitudinal direction of the swing arm 117 to allow the head 115 to move along the radial direction of the disk 113. have.

The base 111 is provided with a rotating shaft 118 to rotatably support the swing arm 117, and the swing arm 117 to support the swing arm 117 with respect to the rotating shaft 118 to rotate. The bearing part 119 is provided.

The head 115 is typically provided with a slider structure so that the buoyancy can be generated so that the head 115 is spaced apart from the recording surface of the disk 113 when the disk 113 is rotated, and in recent years, MEMS (MEMS) to enable precise focusing. MEMS Actuators using Micro Electro Mechanical Systems are also available.

The actuator 121 is composed of a so-called Voice Coil Motor (VCM) that generates a fine driving force so that the head 115 can follow the track of the disk 113.

On the other hand, the disk 113 is a magnetic formula having a recording layer coated with a magnetic material, a laser formula using a laser light, and a magnetic / magnetic effect of a recent magnetic thin film to record information / data and to read it using a magneto-optical effect. It is composed of magneto-optical.

By the way, in such a conventional information recording / reproducing apparatus, the swing arm 117 is coupled to the rotating shaft 118 via the bearing portion 119 to rotate about the rotating shaft 118, so that the bearing portion 119 Due to the frictional force of), not only the required driving force is increased but also it is difficult to precisely control the position of the head 115.

In addition, when the swing arm method is applied to the magneto-optical type, a lens and a coil (not shown) are arranged on the head 115 side, and in particular, a MEMS actuator (not shown) for focusing the head 115 is provided on the head 115 side. In the case of the head 115, the inertia of the head 115 is generally increased, so that the response speed is absolutely slow to compensate for the motion error of the head 115 in real time, and thus the real time motion compensation is very difficult. Not only becomes difficult to precise position control, but also causes a decrease in frequency characteristics and a deterioration in focusing control characteristics.

It is therefore an object of the present invention to provide an information recording / reproducing apparatus having a magnetically driven head capable of precisely controlling the position of the head relative to the disk.

1 is a diagram showing a head area of a conventional information recording / reproducing apparatus;

2 is a plan view of an information recording / reproducing apparatus having a magnetically driven head according to an embodiment of the present invention;

3 is a perspective view of the magnetic force generating unit of FIG.

4 is a side view of the magnetic force generating region of FIG. 2;

5 is a plan view of an information recording / reproducing apparatus having a magnetically driven head according to another embodiment of the present invention;

6 is a side view of the magnetic force generating region of FIG. 5.

Explanation of symbols on the main parts of the drawings

13: disc 17: head

19: mount 21: arm

23: magnetic body portion 25: elastic support portion

31a ~ 31d: magnetic force generating part 33: coil

34: fixed core 35: drive driver

The object is, according to the present invention, a disk disposed rotatably with a recording surface; A head disposed on one side of the recording surface of the disk to enable at least one of recording and reproducing information on the recording surface of the disk; A mount unit fixed to one side of the disk; An arm coupled to the head along a length direction and the other side extending toward the mount portion; An elastic support portion having one end connected to the mount portion and the other side connected to the mount portion end portion of the arm to elastically support the arm; A magnetic body portion formed at an end of the mount portion side of the arm; A first magnetic force generating unit having one side fixed to the mount and the other side spaced apart from the magnetic body with a predetermined gap to generate a magnetic force; One side is fixedly disposed on the mount portion so as to be spaced a predetermined distance from one side of the first magnetic force generating portion and the other side is spaced apart from the magnetic body portion with a predetermined gap to include a second magnetic force generating portion for generating a magnetic force It is achieved by an information recording / reproducing apparatus having a driven head.

Here, the second magnetic force generating portion is preferably installed to be spaced apart from the first magnetic force generating portion along the plate surface direction of the disk so that the head can be moved along the radial direction of the disk.

The second magnetic force generating portion may be disposed to be spaced apart from the first magnetic force generating portion along the thickness direction of the disk so that the head is moved along the thickness direction of the disk.

The first magnetic force generating portion is composed of a pair of spaced apart from each other along the plate surface direction of the disk, the second magnetic force generating portion is spaced apart in the thickness direction of the disk, respectively with respect to the first magnetic force generating portion It is preferred to be configured in pairs.

The first magnetic force generating portion and the second magnetic force generating portion includes a coil for generating a magnetic force and a fixed core around which the coil is wound, wherein the magnetic body is effectively a movable core disposed on the arm corresponding to each of the fixed cores. to be.

The first magnetic force generating unit and the second magnetic force generating unit includes a coil for generating a magnetic force and a fixed core in which the coil is wound, and the magnetic body is preferably a permanent magnet disposed corresponding to each of the fixed cores.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

2 is a plan view of an information recording / reproducing apparatus having a magnetically driven head according to an embodiment of the present invention, FIG. 3 is a perspective view of the magnetic force generating portion of FIG. 2, and FIG. 4 is a view of the magnetic force generating portion region of FIG. 2. Side view. As shown in these figures, the information recording / reproducing apparatus provided with the present self-driven head includes a disk 13 rotatably disposed with a recording surface for recording or reproducing information, and The head 17 disposed on one side of the recording surface, the mount portion 19 fixedly formed at a predetermined distance from the disk 13, one end of the head 17 is fixedly coupled, the other end of the disk 13 An arm 21 arranged to extend toward the mount portion 19 along the plate surface direction, a magnetic body portion 23 formed at an end of the mount portion 19 side of the arm 21, and one end thereof to the mount portion 19; The elastic support 25 is fixedly coupled and the other end is connected to the arm 21 to elastically support the arm 21, and the magnetic body portion 23 and the predetermined gap C are mounted on the mount portion 19 with a predetermined distance from each other. The first to fourth magnetic force generating units 31a to 31d are disposed to be spaced apart from each other.

A disk 13 having a recording surface formed thereon for recording information on the upper side of the base 11 fixedly arranged in a plate shape is rotatably coupled around the rotation shaft 15, and on one side of the disk 13, a mount portion. 19 is fixedly arranged.

On the upper side of the recording surface of the disk 13, an arm 21 is arranged to be movable so that the head 17 can be moved in the radial direction and the thickness direction of the disk 13, respectively, and at the end of the arm 21, the head is disposed. (17) is combined. Arm 21 is formed to have a long rod shape, the other end is extended to the mount portion 19 side, the end portion of the mount portion 19 side elastic support portion 25 is integrally coupled to the mount portion 19 The other end of is integrally combined.

On the other hand, in the mount portion 19, the first magnetic force generating portion 31a and the second magnetic force generating portion 31b for generating a magnetic force so that the head 17 can be moved in the radial direction or the thickness direction of the disk 13. Is formed.

Each of the magnetic force generating portions 31a to 31d includes a coil 33 for generating a magnetic force and a fixing core 34 fixedly coupled to the mount portion 19 and wound around the coil 33. Coils 33 of the respective magnetic force generating units 31a to 31d are connected with driving drivers 35 for controlling the magnetic force by varying the voltage applied to the coils 33, and mounting of the arm 21. The magnetic body portions 23 are formed at the end portions of the portions 19 so as to mutually act magnetically with the respective magnetic force generating portions 31a to 31d.

By such a configuration, when the head 17 is to be moved and controlled outward in the radial direction of the disk 13, the magnetic force generated by the first magnetic force generating portion 31a and the third magnetic force generating portion 31c is removed. To control the drive driver 35 so as to be larger than the magnetic force generated by the second magnetic force generating portion 31b and the fourth magnetic force generating portion 31d, and to move the head 17 toward the center of the disk 13. In contrast, the magnetic force generated by the second magnetic force generating portion 31b and the fourth magnetic force generating portion 31d becomes larger than the magnetic force generated by the first magnetic force driving portion and the third magnetic force generating portion 31c, as opposed to the case described above. You can do that.

On the other hand, when the head 17 is to be moved close to the disk 13 along the thickness direction of the disk 13, the magnetic force generated by the third magnetic force generating portion 31c and the fourth magnetic force generating portion 31d. When the first magnetic force generating portion 31a and the second magnetic force generating portion 31b are to be larger than the magnetic force generated, and the head 17 is to be moved away from the disk 13, the first magnetic force is generated. The magnetic force generated by the portion 31a and the second magnetic force generation portion 31b may be larger than the magnetic force generated by the third magnetic force generation portion 31c and the fourth magnetic force generation portion 31d.

In addition, the magnetic force generated by the first magnetic force generating portion 31a and the fourth magnetic force generating portion 31d is larger than the magnetic force generated by the second magnetic force generating portion 31b and the third magnetic force generating portion 31c. The small size allows an effective response when the disk 13 and / or the arm 21 are inclined or twisted about the rotation axis 15 line of the disk 13.

FIG. 5 is a plan view of an information recording / reproducing apparatus having a magnetically driven head according to another embodiment of the present invention, and FIG. 6 is a side view of the magnetic force generating portion region of FIG. The same reference numerals and the same components as the above-described and illustrated configurations are denoted by the same reference numerals for convenience of description, and detailed description thereof will be omitted. As shown in these figures, the information recording / reproducing apparatus provided with the present self-driven head includes a head 17 arranged on one side of the recording surface of the disk 13 so as to be relatively movable, and a plate surface of the disk 13. An arm 21 to which the head 17 is coupled to one side, a mount portion 19 disposed to be spaced a predetermined distance from one side of the disk 13, and one end of the mount portion 19 to the mount portion 19. The other end is integrally coupled and the other end is integrally coupled to the arm 21 and arranged around the elastic support 25 for elastically supporting the arm 21 and the elastic support 25 of the mount 19 to generate magnetic force. The magnetic force generating portions 31a to 31d corresponding to the first to fourth magnetic force generating portions 31a to 31d and the ends of the arm 21, respectively, and the predetermined voids C and the respective magnetic force generating portions 31a to 31d. The first to fourth permanent magnets (41a to 41c, the fourth permanent magnets) disposed to be spaced apart from each other and interact with the respective magnetic force generating units (31a to 31d) Not shown).

Each of the magnetic force generating portions 31a to 31d includes a fixed core 34 fixed to the mount portion 19 and a coil 33 wound around the fixed core 34 to generate a magnetic force. Drive coils 35 are connected to each coil 33 so as to adjust magnetic force.

By such a configuration, the suction force and / or the repulsive force are properly applied between the first to fourth magnetic force generating portions 31a to 31d and the first to fourth permanent magnets 41a to 41c through the respective driving drivers 35. The lower surface head 17 can be precisely position-controlled along the radial direction and the thickness direction of the disk 13.

As described above, according to the present invention, a disk, a head disposed on one side of the disk, a mount portion fixedly disposed on one side of the disk, and an arm disposed along the plate surface direction of the disk and integrally coupled to one side of the disk An elastic support portion integrally coupled to the mount portion to elastically support the arm; By allowing the head to be driven along the radial or thickness direction of the disk by magnetic force, it is possible to suppress the increase in power required due to the friction of the bearing part and to record information with a magnetically driven head capable of precise position control of the head. A playback device is provided.

Further, according to the present invention, since a separate component for focusing the head is not disposed on the head side, not only the inertia on the head side can be suppressed from increasing, but also the frequency characteristic due to the separate component on the head side is reduced. And a magnetic recording head capable of preventing the deterioration of the focus control characteristic.

Claims (6)

A disk rotatably disposed with a recording surface; A head disposed on one side of the recording surface of the disk to enable at least one of recording and reproducing information on the recording surface of the disk; A mount unit fixed to one side of the disk; An arm coupled to the head along a length direction and the other side extending toward the mount portion; An elastic support portion having one end connected to the mount portion and the other side connected to the mount portion end portion of the arm to elastically support the arm; A magnetic body portion formed at an end of the mount portion side of the arm; A first magnetic force generating unit having one side fixed to the mount and the other side spaced apart from the magnetic body with a predetermined gap to generate a magnetic force; One side is fixedly disposed on the mount portion so as to be spaced a predetermined distance from one side of the first magnetic force generating portion and the other side is spaced apart from the magnetic body portion with a predetermined gap to include a second magnetic force generating portion for generating a magnetic force An information recording / reproducing apparatus having a drive head. The method of claim 1, And the second magnetic force generating portion is spaced apart from the first magnetic force generating portion along the plate surface direction of the disk so that the head can be moved in the radial direction of the disk. / Playback device. The method of claim 1, And the second magnetic force generating portion is spaced apart from the first magnetic force generating portion along the thickness direction of the disk so that the head is moved along the thickness direction of the disk. / Playback device. The method of claim 1, The first magnetic force generating portion is composed of a pair of spaced apart from each other along the plate surface direction of the disk, the second magnetic force generating portion is spaced apart in the thickness direction of the disk, respectively with respect to the first magnetic force generating portion An information / recording and reproducing apparatus having a magnetically driven head, characterized in that it comprises a pair. The method according to any one of claims 1 to 4, The first magnetic force generating portion and the second magnetic force generating portion includes a coil for generating a magnetic force and a fixed core around which the coil is wound, wherein the magnetic material is a movable core disposed on the arm corresponding to each of the fixed cores. An information / recording and reproducing apparatus having a magnetically driven head. The method according to any one of claims 1 to 4, The first magnetic force generating unit and the second magnetic force generating unit includes a coil for generating a magnetic force and a fixed core around which the coil is wound, wherein the magnetic body is a permanent magnet disposed corresponding to each of the fixed cores An information / recording and reproducing apparatus having a driven head.