JPH0554625A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To facilitate the attachment and detachment of a spindle motor body and a circuit board for driving the magnetic disk device. CONSTITUTION:A lead wire 6-1 for supplying a power source is led out of a stator 6 and is joined to the circuit board 11 having contact pins 12 fixed to a base plate 2 through the inside of a shaft 1. Further, a connector 13 is fixed to the circuit board 9 for driving the magnetic disk device in such a manner that the contact pins 12 are inserted therein at the time of packaging the circuit board 9 for driving the magnetic disk device to a disk enclosure 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk device, and more particularly to a structure for connecting a spindle motor of a magnetic disk device and a circuit board for driving the magnetic disk device.

[0002]

2. Description of the Related Art In recent years, magnetic disk devices have been downsized as their applications have expanded. For this reason, the thickness of the spindle motor for rotating the magnetic disk must be reduced as much as possible.

As a means for solving this problem, attention has been paid to the fact that there is a space inside a spindle hub for mounting a magnetic disk, and in this space there are a stator and a magnet (permanent magnet), which are the main parts constituting the spindle motor. ), A spindle motor in which a motor and a spindle hub are integrated has been devised.

Further, since a lead wire connected to a circuit board for driving a magnetic disk device for supplying power to a spindle motor has a small space for wiring, a flexible printed circuit (hereinafter referred to as FPC) is used. There is.

FIG. 2 is a sectional view of a spindle motor of such a magnetic disk device and a circuit board connection diagram for driving the magnetic disk device. The shaft 1 is press-fitted and fixed to the base plate 2. The base plate 2 is fixed to the disk enclosure 10.

Bearings 3 and 4 are attached to the shaft 1. A spindle hub 5 is fixed to the outer rings of the bearings 3 and 4. Further, in order to drive this spindle, a stator 6 is fixed to the shaft 1 and a magnet 7 is provided on the spindle hub 5.

A lead wire 6-1 for supplying power from the stator 6 is drawn out and passed through the inside of the shaft 1 to a base plate 2
Is joined to the FPC 8 by soldering or the like. FP
A part of C8 is adhesively fixed to the base plate 2, and the FPC 8 is connected to the circuit board 9 for driving the magnetic disk device. 1
1 is a circuit board, 12 is a contact pin, 13 is a connector, 14
Is a magnetic disk, 15 is a spacer, and 16 is a clamper.

[0008]

In the above-described method of connecting the spindle motor of the conventional magnetic disk device and the circuit board for driving the magnetic disk device, a dedicated extension wiring using an FPC or the like is required and the cost is increased.

Further, there is a drawback that wiring of an FPC or the like is complicated due to space problems, connection to a circuit board is not easy, and automation is difficult.

An object of the present invention is to provide a magnetic disk device that solves the above problems.

[0011]

In order to achieve the above object, in a magnetic disk apparatus according to the present invention, a disk enclosure having a substantially rectangular parallelepiped shape in which a spindle motor having a magnetic disk and a carriage having a magnetic head are mounted is provided. A circuit board for driving a magnetic disk device mounted on an outer wall of the disk enclosure, wherein the main body of the spindle motor is a circuit board or a flexible printed circuit so as to be exposed to the outside of the disk enclosure. A circuit and a contact pin are fixed, and further fixed to the magnetic disk device driving circuit board so as to be directly inserted into the contact pin when the magnetic disk device driving circuit board is mounted on the disk enclosure. Connector Those having.

[0012]

In the present invention, the lead wire pulled out from the stator can be attached and detached by the connector.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view showing the periphery of a spindle motor of a magnetic disk device according to an embodiment of the present invention, and a circuit board connection diagram for driving the magnetic disk device.

In FIG. 1, a shaft 1 is press-fitted and fixed to a base plate 2. The base plate 2 is fixed to the disk enclosure 10.

Bearings 3 and 4 are attached to the shaft 1. A spindle hub 5 is fixed to the outer rings of the bearings 3 and 4. Further, in order to drive this spindle, a stator 6 is fixed to the shaft 1 and a magnet 7 is provided on the spindle hub 5.

A lead wire 6-1 for supplying power from the stator 6 is drawn out and passed through the inside of the shaft 1 to a base plate 2
It is joined to the circuit board 11 fixed at the position by soldering or the like.

This circuit board 11 has contact pins 12. Further, a connector 13 is fixed to the circuit board 9 for driving the magnetic disk device so that the contact pin 12 is inserted when the circuit board 9 for driving the magnetic disk device is mounted on the outer wall of the disk enclosure 10.

[0019]

As described above, according to the present invention, the lead wire for supplying power is drawn from the stator provided inside the spindle motor, and the contact pin is fixed to the position of the base plate through the inside of the shaft. A circuit for driving the magnetic disk device is connected to the circuit board by soldering, and a connector for power supply is inserted so that the contact pin is inserted when the circuit board for driving the magnetic disk device is mounted on the outer wall of the disk enclosure. By fixing to the substrate, the need for dedicated extension wiring is eliminated, the circuit board can be easily attached and detached, and it is possible to provide a magnetic disk device that is inexpensive, highly reliable, and highly mass producible.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the periphery of a spindle motor of a magnetic disk device according to an embodiment of the present invention, and a circuit board connection diagram for driving the magnetic disk device.

FIG. 2 is a cross-sectional view around a spindle motor and a board connection diagram of a conventional magnetic disk device.

[Explanation of symbols]

 1 shaft 2 base plate 3 bearing 4 bearing 5 spindle hub 6 stator 6-1 lead wire 7 magnet 8 FPC 9 circuit board for driving magnetic disk device 10 disk enclosure 11 circuit board 12 contact pin 13 connector 14 magnetic disk 15 spacer 16 clamper

Claims (1)

[Claims] 1. A disk enclosure having a substantially rectangular parallelepiped shape in which a spindle motor carrying a magnetic disk and a carriage carrying a magnetic head are mounted, and a circuit board for driving a magnetic disk device mounted on the outer wall of the disk enclosure. A magnetic disk device, wherein a circuit board or a flexible printed circuit and contact pins are fixed to the main body of the spindle motor so as to be exposed to the outside of the disk enclosure, and a circuit board for driving the magnetic disk device is attached to the disk. A magnetic disk device comprising a connector fixed to the circuit board for driving the magnetic disk device so as to be directly inserted into the contact pin when mounted in an enclosure.