JPH0656713B2 - Disk storage - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk storage device, and more particularly to a magnetic disk having a flexible printed circuit provided with an electronic circuit for processing a signal of a signal conversion head provided in a housing for accommodating a head disk assembly. The present invention relates to a disk storage device.

[0002]

2. Description of the Related Art A magnetic disk storage device has a housing in which the environment such as dust is controlled, in which a magnetic disk which rotates at a high speed of several thousand revolutions per minute and a sub-micron on the magnetic disk which rotates at a high speed. It houses a signal conversion head that floats at a certain height and writes or reads data, and an actuator precision machine that positions this signal conversion head to a desired recording track that is arranged at sub-micron intervals on a magnetic disk. And protects from the dusty environment of the outside world. An electronic circuit for controlling these precision machines is mounted on a card attached to the outside of the housing because of heat generation, connection with the outside, space and the like.

However, since the signal representing the data read from the magnetic disk by the signal conversion head is weak, the signal conversion head can be amplified as close to the signal conversion head as possible, that is, in the housing to prevent the S / N ratio from decreasing. is necessary. Therefore, some electronic circuits including an amplifier for amplifying the head signal have been conventionally arranged on the flexible printed circuit provided in the housing, and easily follow the movement of the actuator equipped with the signal conversion head. I am able to do it.

Conventional examples of such a flexible printed circuit are shown in US Pat. Nos. 4,933,785 and 5,025.
335 and 5,025,336.

[0005]

However, the conventional flexible printed circuit has the following problems. In order to electrically connect the flexible printed circuit to an external card, if the flexible printed circuit is led out between the substrate and the cover that form the housing, the hermeticity of the housing is impaired and the controlled environment inside the housing is maintained. It may run out.

Further, since the flexible printed circuit is fixed to the substrate with screws, in the case of a thin magnetic disk storage device, since the substrate is thin, the airtightness of the screw holes is reduced, and the controlled environment in the housing is reduced. May not be maintained.

Further, in the work of fixing the flexible printed circuit to the substrate with the screw, it is necessary to position the flexible printed circuit before fixing with the screw, which affects workability and productivity of assembling the magnetic disk storage device. Exert. This becomes more serious as the magnetic disk storage device becomes smaller.

Further, since the flexible printed circuit is arranged in a single layer in the housing, it becomes difficult to arrange required electronic parts on the flexible printed circuit as the magnetic disk storage device is miniaturized.

Therefore, it is an object of the present invention to solve the above-mentioned problems of the flexible printed circuit of the conventional magnetic disk storage device.

[0010]

A magnetic disk storage device according to the present invention has the following structure in order to solve the above-mentioned problems.

A first connector provided on the wall of the housing for electrically connecting the inside and the outside of the housing of the magnetic disk storage device, and means for locking the first connector at one end,
A second connector fitted to the first connector and electrically connected to the other end, and a signal conversion head between the one end and the other end and a signal of the signal conversion head electrically connected to the second connector And a flexible printed circuit having an electronic circuit for processing.

According to such a configuration of the present invention, the flexible printed circuit can be folded in two and fixed to both ends of the first connector provided on the wall of the housing. Embodiments of the present invention will be described below with reference to the drawings.

[0013]

1 to 6 show an embodiment of the present invention. First, a description will be given with reference to FIG. The magnetic disk storage device 1 has a housing 2 and an electronic circuit card 3. The housing 2 includes a substrate 4 and a cover 5. In the housing 2, a magnetic disk 6 rotatably supported by a substrate 4 and a signal conversion head (not shown) for writing or reading data on the recording surface of the magnetic disk 6 are attached to face the recording surface of the magnetic disk 6. And the slider 7 attached to one end of the magnetic disk 6
And an actuator 8 rotatably supported on the substrate 4 for positioning it on one of the desired tracks. The substrate 4 and the cover 5 can be hermetically sealed to create an environment in which dust is controlled in the housing 2 separately from the outside. The outside world and the inside of the housing 2 are connected to each other through a breather filter (not shown) to prevent a pressure difference between the inside and outside of the housing 2.

A write signal to the recording surface of the magnetic disk 6, a read signal from the recording surface of the magnetic disk 6, and power to the actuator 8 electrically connect the inside and outside of the housing 2 as shown in FIGS. 2 and 3. For this purpose, from the electronic circuit card 3 attached to the back of the housing 2 through the two rows of pin terminal rows 9b which are implanted in the board 4 through the insulator 9a and penetrate the board 4 and project from both sides. Sent or sent to the electronic circuit card 3. The two rows of pin terminals 9b planted on the substrate 4 constitute the first connector 9.
A flexible printed circuit 11 provided in the housing 2 for processing the signal of the signal conversion head is electrically connected to the pin terminal row 9b protruding into the housing 2. The connector 10 attached to the electronic circuit card 3 is electrically connected to the pin terminal row 9b protruding outside the housing 2.

As shown in FIG. 4, on one surface 11a of the flexible printed circuit 11 of the present invention, an electronic component 12 for constituting an amplifier circuit for amplifying a read signal or a write signal from the signal conversion head is mounted. It The electronic component 12 is connected to a circuit pattern (not shown) of the flexible printed circuit 11. Flexible printed circuit 1
One end side 11b of 1 is extended laterally to integrally form a flexible cable 11c. The end of the flexible cable 11c which is separated from the flexible printed circuit 11 is fixed to the actuator 8 and is provided with a mounting plate 11d and a screw hole 11e for that purpose. A circuit pattern (not shown) is formed on the flexible cable 11c, and the electronic component 12 on the flexible printed circuit 11 is electrically connected to the signal conversion head through a wiring (not shown) provided on the actuator 8. The flexible cable 11c is also provided with wiring for supplying power to the actuator 8 (not shown).

One end side 11b of the flexible printed circuit 11
On the other surface, a head 13a of a plastic plate 13 having a substantially T-shaped cross section is fixed. Leg 1 of plastic board 13
3b is mounted substantially perpendicular to the flexible printed circuit 11. The leg portion 13 b has a substantially rectangular through hole 13.
c is provided. The size of the through hole 13c is such that it can be fitted to the outer circumference of the two pin rows 9b of the first connector 9 protruding from the substrate 4 of the housing 2 into the housing 2, and the plate thickness of the leg portion 13b is It is smaller than the length of the pin of the first connector 9. This plastic plate 13 constitutes a locking means for the first connector 9. In addition to the provision of the through hole 13c, many locking means configurations are conceivable. For example, it is conceivable that the protrusion fits into the hole provided in the first connector 9.

The other end side 11f of the flexible printed circuit 11
A second connector 14 having a substantially rectangular parallelepiped connector housing 14a protruding vertically from this surface 11a is provided on the one surface 11a. The pin terminal row 9b of the first connector 9 is fitted in the connector housing 14a to electrically connect to the second connector 4 and mechanically connect both. A dotted line 11g on the flexible printed circuit 11 shown in FIG. 4 indicates that the flexible printed circuit 11 can be bent along the dotted line 11g.

FIGS. 5 and 6 show how the flexible printed circuit 11 of this embodiment is positioned on the first connector 9 protruding from the substrate 4 and assembled on the substrate 4.
First, the through hole 13c of the leg portion 13b of the plastic plate 13 attached to the one end 11b of the flexible printed circuit 11
Is fitted to the outer periphery of the pin row 9b of the first connector 9 to position the flexible printed circuit 11 in the horizontal direction. Next, the flexible printed circuit 11 is folded in two along the dotted line 1g and projected from the through hole 13c to the second connector 14 having the connector housing 14a attached to the other end 1f of the flexible printed circuit 11. The pin terminal row 9b of the first connector 9 is inserted and the flexible printed circuit 11 is fixed to the first connector 9.
At the same time, the flexible printed circuit 11 is electrically connected to the first connector 9. First connector pin terminal row 9
The holding force by the elastic force between b and the second connector 14 is sufficiently large to fix the flexible printed circuit 11.

[0019]

The present invention has the following effects. The flexible printed circuit has two layers when assembled,
The three-dimensional arrangement of electronic components reduces the projected area and helps to reduce the size of the entire device. Since all the electronic components are mounted on one surface of the flexible printed circuit, the flexibility of the flexible printed circuit itself can be easily manufactured.

The flexible printed circuit is positioned and fixed by engaging one end of the flexible printed circuit with the first connector projecting from the substrate and fitting the other end of the flexible printed circuit into the first connector so as to be superposed on the first connector. Therefore, it is not necessary to use a conventional fixing screw and to provide a screw hole in the substrate. In addition, the workability of assembly and the productivity are excellent.

Since the flexible printed circuit is electrically connected to the outside of the housing through the first connector protruding from the substrate, the airtightness of the housing can be maintained.

[0022]

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a magnetic disk storage device according to an embodiment of the present invention,

FIG. 2 is a perspective view of a substrate of the magnetic disk storage device of the embodiment of FIG.

3 is a cross-sectional view of a main part of the magnetic disk storage device of FIG. 2 taken along the line III-III in FIG.

FIG. 4 is an exploded perspective view of a flexible printed circuit used in this embodiment,

FIG. 5 is a perspective view showing the mounting of the flexible printed circuit used in this embodiment,

FIG. 6 is a perspective view showing attachment of a flexible printed circuit used in this embodiment.

[Explanation of symbols]

 1 Magnetic Disk Storage Device 2 Housing 3 Electronic Circuit Card 4 Board 6 Magnetic Disk 7 Slider 8 Actuator 9 First Connector 10 Connector 11 Flexible Printed Circuit 12 Electronic Circuit Component 13c Through Hole 14 Second Connector

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Seiichi Anfuku 2-22-19 Hayashima, Yamato City, Kanagawa Prefecture Cosmo Heights No. 302

Claims (6)

[Claims] 1. A housing for maintaining a controlled environment inside, a disk having a recording surface rotatably supported in the housing, and data recorded on the recording surface of the disk provided in the housing. In a disk storage device comprising a signal conversion head for writing or reading and a card including a control electronic circuit mounted on the outside of the housing, the disk storage device is provided on a wall forming the housing, and the inside and the outside of the housing are provided. A first connector that is in electrical communication with a means for locking the first connector in the housing at one end, and a second connector that is fitted and electrically connected to the first connector in the housing at the other end A connector, and between the one end and the other end, electrically connected to the signal conversion head and the second connector to process the signal of the signal conversion head That the electronic circuitry, disk storage apparatus characterized by comprising a flexible printed circuit, a having. 2. The disk storage device according to claim 1, wherein the locking means is a through hole that is fitted into the outer periphery of the first connector projecting from the wall into the housing. 3. The disk storage device according to claim 2, wherein the through hole is formed in a plate that is fixed to one end of the flexible printed circuit and has a rigidity higher than that of the flexible printed circuit. 4. The disk storage device according to claim 1, wherein the second connector has a connector housing fixed to the other end of the flexible printed circuit and more rigid than the flexible printed circuit. 5. The disk storage device according to claim 1, wherein said flexible printed circuit has a flexible cable for connection to said signal conversion head. 6. A housing for maintaining a controlled environment inside, a disk having a recording surface rotatably supported in the housing, and data recorded on the recording surface of the disk provided in the housing. A signal conversion head for writing or reading, a flexible printed circuit provided with an electronic circuit provided in the housing for processing a signal of the signal conversion head, and a control electronic circuit mounted outside the housing. And a card including the card, the flexible printed circuit having a structure in which the flexible printed circuit is folded in half around a horizontal axis in the housing.