JPH04313873A - Disk drive device - Google Patents

Abstract

PURPOSE:To provide a disk drive device which can easily adjust the relative position of the disk loading surface at a chucking part placing the disk and the head and can perform the adjustment in a short period and correctly. CONSTITUTION:The disk device is provided with a head 2 for recording and reproducing and places and drives a disk 1 for information recording and reproducing. A rotary shaft 12a is fixed on the one edge of the chucking part 10 placing the disk 1 and adjustment structures 21, 22 which adjust the relative position of the chucking part 10 and the head 2 with abutting on the other end of the shaft 12a are provided on the edge part of a bush 18a holding the rotary shaft 12a in freely rotatably.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] This invention relates to a disk drive device for mounting and rotating a disk in order to record information on a disk for recording image information or data information, or to read information from the disk. .

0002

2. Description of the Related Art FIG. 2 is a sectional view of a main part of a conventional disk drive device of this type, and the prior art will be explained with reference to this figure.

1 is a disk which is a medium for recording images or data information; 2 is a head for recording or reproducing information on the disk 1; 3 is a spindle on which the disk 1 is placed and driven to rotate at a predetermined number of rotations; Reference numeral 4 denotes a chassis on which is mounted a head transport mechanism (not shown) for holding the head 2 and moving it across the recording or reproducing area of the disk 1, a spindle 3, and the like.

Next, the spindle 3 will be explained in more detail. 10 is a chucking part of the spindle that engages with the center core 5, which is an engaging part of the disc 1; 11 is a chucking magnet that is adhered to the chucking part 10 and fixes the center core 5 of the disc 1 by suction; 12 is a chucking part A shaft 10 is press-fitted at one end, and 13 is a field magnet of the motor, which is fixed to the back surface of the chucking part 10 via a yoke 14.

15a is a drive coil, and 15b is a drive coil 15a mounted on which a Hall element for switching and a drive IC are mounted.
16 is a stator yoke made of silicon steel plate, etc., and the drive coil 1
It is arranged so as to face the field magnet 13 with 5a in between.

A bush 18 rotatably holds the rotary shaft 12 and is fixed to the stator yoke 16. 19 is a sliding bearing press-fitted into the bush 18, and 19a is a thrust bearing press-fitted into the end of the bush 18, which constantly receives the thrust of the rotating shaft 12 and defines the position of the rotating shaft 12 with respect to the bush 18. There is. A spacer 20 is inserted between the chassis 4 and the stator yoke 16.

[0007]

[Problems to be Solved by the Invention] However, since the height of the disk mounting surface of the chucking portion 10 of the spindle 3 requires high precision relative to the head 2, the prior art After measuring the height, it is necessary to install the spacer 20 corresponding to the specified relative height difference, then take further confirmation measurements and repeat the adjustment with the spacer 20, which requires a lot of construction time and skill. was needed.

The present invention has been made to solve the problems of the prior art described above, and an object of the present invention is to provide a disk drive device in which the relative height between the disk mounting surface and the head can be easily adjusted. It is something to do.

[0009]

[Means for Solving the Problems] Therefore, a disk drive device according to the present invention has a recording/reproducing head,
A disk drive device that places and rotates a disk for recording and reproducing information, comprising a rotating shaft with one end fixed to a chucking portion on which the disk is placed, and a rotating shaft that is in contact with the other end of the rotating shaft. The above object is achieved by a configuration characterized in that an adjustment mechanism for adjusting the relative position of the chucking part and the head is provided at the end of a bush that rotatably holds the rotary shaft. be.

0010

[Operation] With the above structure, a disk for information recording/reproduction can be mounted and rotated, and the head can record information on the disk and read information from the disk. The relative position between the head and the disk mounting surface of the chucking section on which the disk is placed can be easily adjusted by the adjustment mechanism provided at the end of the bush that rotatably holds the rotating shaft.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a disk drive device according to the present invention will be explained with reference to embodiments. FIG. 1 is a sectional view of one embodiment of the present invention, and parts that are the same as or corresponding to those of the conventional example are designated by the same reference numerals.

1 is a disk that is a medium for recording images or data information; 2 is a head for recording or reproducing information on the disk 1; 3 is a head on which the disk 1 is placed and driven to rotate at a predetermined number of rotations; A spindle 4, which holds the head 2 and moves it over the recording or reproducing area of the disk 1, is a chassis on which a head feeding mechanism (not shown), a spindle 3, etc. are mounted.

Next, the spindle 3 will be explained in more detail. Numeral 10 is a chucking portion of the spindle that engages with the center core 5, which is an engaging portion of the disk 1. Numeral 11 is a chucking portion of the spindle that is bonded to the chucking portion 10 and is attached to the center core 5 of the disk 1. A chucking magnet 12a attracts and fixes the core 5, a rotary shaft 12a has one end press-fitted into the chucking part 10 and the other end has a spherical shape, and 13 a motor field magnet, which is attached to the chucking part 10 through a yoke 14. is fixed on the back of the The above configuration also forms a spindle motor rotor that rotates with respect to the chassis 4.

Reference numeral 15 denotes a board, and the circuit pattern of this board 15 includes a drive coil part and a mounting pattern part formed by plating or etching, and a drive coil pattern is provided at a position facing the field magnet 13. ,
At other positions, mounting patterns communicating with drive patterns, coil switching Hall elements, drive ICs, servo ICs, etc. are arranged. Reference numeral 16a denotes a laminate yoke on which amorphous foil is laminated, and 17 denotes a holding portion for holding the laminate yoke 16, which is made of metal or plastic and is attached to the chassis 4.

A bush 18a rotatably holds the rotary shaft 12, and is fixed to the holding portion 17 and connected to the chassis 4. Slide bearings 19 are press-fitted into the inside of the bush 18a at two locations, upper and lower, to rotatably hold the rotary shaft 12a. Further, the end portion is an open opening, and a female thread 21 is provided on the inner peripheral surface.

Reference numeral 22 denotes an adjustment screw, which is screwed into the female thread 21 at the end of the bushing 18 and comes into contact with the spherical end of the rotating shaft 12a, and by adjusting the degree of screwing, the rotating shaft 12a is adjusted to the bushing 18. The position can be adjusted. That is, the female thread 21 and the adjustment screw 22 provided at the end of the bush 18 form an adjustment mechanism. Note that the adjustment screw 22 is made of a material with higher hardness than the rotating shaft 12a.

With the above configuration, the relative height between the disk receiving surface of the chucking portion 10 of the spindle 3 on which the disk 1 is placed and the head 2 can be adjusted by rotating the adjusting screw 21 while monitoring the relative height. This allows the desired value to be easily set.

[0018]

[Effects of the Invention] As explained above, according to the present invention, a disk for recording and reproducing information is placed and rotated,
Information can be recorded and read by the head. and,
The adjustment mechanism provided at the end of the bushing that rotatably holds the rotary shaft allows for easy adjustment while monitoring the relative position between the disk mounting surface of the chucking section on which the disk is placed and the head. , adjustments can be made quickly and accurately.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of one embodiment.

FIG. 2 is a sectional view of a conventional example.

[Explanation of symbols]

1 Disk 2 Head 3 Spindle 4 Chassis 10 Chucking part 12a Rotating shaft 13 Field magnet 18a Bush 21 Female screw (adjustment mechanism) 22 Adjustment screw (adjustment mechanism) In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A disk drive device having a head for recording and reproducing, on which a disk for recording and reproducing information is mounted and driven to rotate, one end being fixed to a chucking part on which the disk is placed. and an adjustment mechanism that abuts the other end of the rotating shaft to adjust the relative position between the chucking part and the head, is provided at the end of a bush that rotatably holds the rotating shaft. disk drive.