JPH0312892A - Disk device - Google Patents

Abstract

PURPOSE:To reduce bending stress added to a signal line and to prevent the crack and disconnection of the signal line by respectively providing a signal line retainer on a carriage-side so that it is rotatable with respect to a carriage and a signal line retainer on an enclosure-side so that it is rotatable with respect to an enclosure. CONSTITUTION:The signal line retainer 27 on the carriage-side is provided so that it is rotatable with respect to the carriage 23, and the signal line retainer 26 on the enclosure-side so that it is rotatable with respect to the enclosure 25 are provided. When the carriage 23 moves, the signal line retainers 26 and 27 rotate in a direction where the deflection angle of the signal line 24 is reduced. Thus, bending stress added to the signal line 24 of FPC and the like is reduced and the crack and disconnection of the signal line 24 can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Summary] This invention relates to a disk device that sends and receives signals via a signal line to a carriage that has a head that moves to a desired position on the disk and writes/writes data. The objective is to provide a disk device that reduces bending stress applied to signal lines and prevents cracks and disconnections in the signal lines. The signal line holders are configured to be rotatably provided to the enclosure.

[Industrial Application Fields] The present invention provides a method for transmitting and receiving signals to and from a carriage having a head that moves to a desired position on a disk and performs data recording/writing.
The present invention relates to a disk device that operates via a signal line such as 1inted (jrcuit).

In such a disk device, when reading/writing data, a carriage is driven to move the head to a target track. As the carriage is driven, bending stress is repeatedly applied to the signal line, which may cause cracks or disconnections. Therefore, there is a need for a disk device that does not cause such a problem.

[Prior Art] Next, a conventional example will be explained using the drawings. FIG. 6 is a configuration diagram of a conventional magnetic disk drive, FIG. 7 is an exploded perspective view of the FPC holder on the enclosure side in FIG. 6, and FIG. 8 is a perspective view of the FPC holder on the carriage side.

In the figure, ] is a spindle rotationally driven by a spindle motor (not shown), and 2 is a plurality of disks stacked on the spindle 1 .

3 is an actuator section. The actuator 3 is provided with a carriage 7 to which a head 4 for writing/writing data to the disk 2 is attached via a gimbal spring 5 and a head arm 6. A guide portion 7a is provided on the side of the carriage 7. The guide portion 7a has guide surfaces facing diagonally upward and diagonally downward. 8
is a guide roller that comes into contact with the guide portion 7a and guides the carriage 7 so as to be movable in the direction of the arrow. The carriage 7 is driven by a voice coil motor (not shown).

One end of 9 is attached to the carriage 7, and the other end is attached to the FPC
These are four FPCs that are mounted on the presser part 10 and send and receive signals to and from the carriage 7.

Here, the FPC holding part on the enclosure side will be explained using FIG. 7. The FPC holding part 10 surrounds the block 11 in which the groove [1a] is carved, the base 14 which is attached to the positioner housing 12 on the magnetic disk device main body side using the screw [3], and the block 11, and the base 14 is attached using the screw [3]. The cover 16 is attached to the base 14 together with the block 1. Two of the four FPCs 9 are blocks] groove 11. The other two FPCs are held between the block 1 and the base 14 and between the block 11 and the cover 16, and the FPC 9 is fixed to the magnetic disk body side.

Next, the FPC pusher 17 on the carriage side will be explained using FIG. An FPC holding projection 18 is formed on the carriage 7. Then, the four FPCs 9 are wrapped around the FPC holding protrusion 18, and with one clip,
It is locked. 20 is a screw for fixing the clip 19.

Next, the operation of the above configuration will be explained. The disk 2 is moved by a spindle motor (not shown), for example, 3BOOrp.
It is rotating at a speed of m. When a current flows to the voice coil motor from a control circuit (not shown), the carriage 7 moves in the direction of the arrow in the figure, and the head 4 is moved to the target track.

Data is then read/written to the disk 2.

[Problems to be Solved by the Invention] In the conventional example with the above configuration, one end of the FPC 9 is
The other end is attached to the holding part 10 and the FPC holding part 17. Therefore, when the carriage 7 moves in the direction of the arrow, bending stress repeatedly acts on the FPC 9, causing a problem that cracks or wire breakage may occur in the FPC 9.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a disk device that reduces bending stress applied to signal lines such as FPCs and prevents cracks and disconnections of the signal lines.

[Means for Solving the Problems] FIG. 1 is a diagram showing the principle of the present invention. In the figure, 2] is a disk, and 22 is a data write/write address for the disk 21.
A head 23 that performs writing is a carriage having the head 22. 24 is a signal line for sending and receiving signals to and from the carriage 23. 26 is a signal line holder rotatably provided on the enclosure 25 side, and 27 is a signal line holder rotatably provided on the carriage side.

[Function] In the disk device shown in FIG. 1, when the carriage 23 moves, the signal line pressers 26 and 27 rotate in a direction that reduces the bending angle of the signal line 24, thereby reducing the bending stress acting on the signal line 24. do.

[Example] Next, an example of the present invention will be described using the drawings. Second
The figure is a configuration diagram explaining one embodiment of the present invention, and FIG.
An exploded perspective view of the FPC holder on the enclosure side in the figure, FIG. 4 is a partial cross-sectional configuration diagram of the FPC holder shown in FIG. 3,
FIG. 5 is a perspective view of the FPC presser on the carriage side.

In the figure, 31 is a spindle rotationally driven by a spindle motor (not shown), and 32 is a plurality of disks stacked on the spindle 31.

33 is an actuator section. The actuator section 33 is provided with a carriage 37 to which a head 34 for reading/writing data to/from the disk 32 is attached via a gimbal spring 35 and a head arm 36 . A guide portion 3 is formed on both sides of the carriage 37 with guide surfaces facing diagonally in one direction and diagonally downward.
7a is provided. Reference numeral 38 denotes a guide roller that comes into contact with the guide portion 37a and guides the carriage 37 so as to be movable in the direction of the arrow. The carriage 37 is driven by a voice coil motor (not shown).

39 has one end attached to the carriage 37, and the other end attached to the F
These are four FPCs that are mounted on the PC holding part 40 and send and receive signals to and from the carriage 37.

Here, the FPC holding part 40 on the enclosure side will be explained using FIG. 3. FPC holding part 40 has groove 4 ], A
engraved block 4] and the magnetic disk device main body (
a base 44 rotatably provided with respect to the enclosure); a cover 46 that surrounds the block 41 and is attached to the base 44 together with the block 4 using screws 45;
It consists of Two of the four FPCs 39 are locked in the groove 41a of the block 41, and the other two FPCs are sandwiched between the block 4 and the base 44 and between the block 41 and the cover 46. After that, FPC3
9 is fixed to an FPC presser 40.

Next, the rotational structure of the FPC holding part 40 on the enclosure side will be explained using FIG. 4. The upper and lower surfaces of the base 44 are provided with stepped projections 44a. A bearing case 51 in which a bearing 50 is disposed is fixed to the top and bottom surfaces of the magnetic disk device (enclosure). Then, by fitting the small diameter portion of the stepped protrusion 44a of the base 44 into the inner ring of the bearing 50, the base 44 (FPC holding portion 40) can rotate relative to the magnetic disk device (enclosure). .

Furthermore, using Figures 2 and 5, check the FPC on the carriage side.
The presser portion 52 will be explained. Side plane 3 of carriage 37
A bearing 53 is embedded in 7a. Reference numeral 54 denotes a block rotatably provided with respect to the carriage 37, and has a protrusion 54a formed on its lower surface to be press-fitted into the inner ring of the bearing 53. Then, the four FPC9s are block 5
4 and is locked by a clip 55. 56 is a screw for fixing the clip 55.

Next, the operation of the above configuration will be explained. The disk 32 is moved by a spindle motor (not shown), for example, 3800r
It rotates at a speed of pm. Then, when a current flows to the voice coil motor from a control circuit (not shown), the carriage 37 moves in the direction of the arrow in the figure, and the head 34 is moved to the target track. Then, data is read/written to/from the disk 32.

According to the above configuration, the FPC holding part 40 is rotatably provided relative to the magnetic disk device (enclosure), and the FPC holding part 40 is rotatably provided with respect to the magnetic disk device (enclosure).
The PC holding part 52 is rotatably provided with respect to the carriage 37. Therefore, when the carriage 23 moves in the direction of the arrow, the FPC holding part 40.52 rotates in a direction in which the deflection angle of the FPC 39 becomes smaller. Therefore, F.P.
The bending stress applied to C is reduced, and cracking and disconnection of the FPC can be prevented.

Note that the present invention is not limited to the above embodiments.

For example, in the above embodiment, the actuator section 33
Although the explanation has been made using a linear type actuator, the present invention can also be applied to a rotary type actuator. Further, in the above embodiment, signals are exchanged via the FPC 39, but the signal cable is not limited to the FPC. Further, the present invention is not limited to magnetic disk devices, but can be implemented similarly to optical disk devices.

[Effects of the Invention] As explained above, according to the present invention, the signal line holder on the carriage side is rotatably provided with respect to the carriage, and the signal line holder on the enclosure side is provided rotatably with respect to the enclosure. By doing so, it is possible to realize a disk device that reduces the bending stress applied to the signal line and prevents the signal line from cracking or breaking.

[Brief explanation of drawings]

Fig. 1 is a principle diagram of the present invention, Fig. 2 is a configuration diagram illustrating an embodiment of the present invention, Fig. 3 is an exploded perspective view of the FPC holder on the enclosure side in Fig. 2, and Fig. 4 is the FIG. 5 is a perspective view of the FPC holder on the carriage side in FIG. 2, FIG. 6 is a configuration diagram of a conventional magnetic disk device, and FIG. 7 is shown in FIG. 6. 8 is an exploded perspective view of the FPC holder on the enclosure side. FIG. 8 is a perspective view of the FPC holder on the carriage side shown in FIG. 6. 1 to 5, 2], 32 is a disk, 2234 is a head, 23.37 is a carriage, 24.39 is an FPC (signal line), 25 is an enclosure, 26.27, 40.52 are FPCs This is a holding part (signal line holding part).

Claims (1)

[Claims] A carriage (23) having a head (22) that moves to a desired position on the disk to read/write data.
On the other hand, in a disk device that sends and receives signals via a signal line (24), a signal line holder (27) on the carriage side is used.
) is provided rotatably with respect to the carriage (23), and a signal line holder (26) on the enclosure side is provided rotatably with respect to the enclosure (25).