JPH0371417A - Carriage for magnetic disk device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Summary] A head arm assembly configured by integrally forming a plurality of head arms stacked at predetermined intervals, a head that reads/writes data to/from a recording medium, and A magnetic head block having a spring arm to which a head is attached to the tip, a spring arm attachment surface to which the base end of the spring arm is attached, and a head block having a head arm attachment surface attached to the tip of the head arm. The purpose of the present invention is to provide a carriage for a magnetic disk device that enables high-speed access, reduces assembly man-hours, and improves workability. A groove is provided, and the lead wire of the head is configured to be pushed through the groove.

[Industrial Application Field] The present invention relates to a head arm assembly configured by integrally forming a plurality of head arms stacked at predetermined intervals, a head for reading/writing data to/from a recording medium, and A magnetic head block having a spring arm to which a head is attached to the tip, a spring arm attachment surface to which the base end of the spring arm is attached, and a head block having a head arm attachment surface attached to the tip of the head arm. This invention relates to a carriage of a disk device.

Recently, there have been demands for magnetic disk drives to be compact, large in capacity, high-speed access, and the like. In order to achieve high-speed access, it is necessary to reduce the weight of the carriage and increase the driving force of the actuator that drives the carriage.

[Prior Art] Next, a conventional example will be explained using the drawings. FIG. 8 is a side configuration diagram of a conventional magnetic disk device, FIG. 9 is an enlarged view illustrating the attachment of the spring arm and head arm in FIG. 8, FIG. 10 is a plan view of FIG. 9, and FIG. 11 is a perspective view of the head block in FIG. 8;

First, in FIG. 8, numeral 1 indicates a head arm assembly constructed by integrally forming a plurality of head arms 1' stacked at predetermined intervals.

A head block 2 is attached to the tip of each head arm 1'. A head 4 is attached to each head block 2 via a spring arm 3. An actuator shaft 5 is attached to the rotation center of the head arm assembly 1. A bearing 6.7 has an inner ring attached to both ends of the actuator shaft 5, an outer ring attached to the magnetic disk device main body, and rotatably supports the head arm assembly 1.

Next, the head block 2 will be explained using FIG. 11. The head block 2 has a spring arm mounting surface 2b in which a spring arm mounting screw hole 2a is drilled,
A head arm mounting surface 2d in which a head arm mounting hole 2C is formed is formed.

Next, in FIGS. 9 and 10, the base end of the spring arm 3 is disposed on the spring arm mounting surface 2b of the head block 2, and a screw 8 is inserted into the spring arm mounting screw hole 2a. It is attached to the head block 2 using the

On the other hand, the head arm mounting surface 2d of the head block 2
is attached using a hexagon socket head bolt 9 which is brought into contact with the end surface of the head arm 1', loosely fitted into the head arm mounting hole 2d, and screwed into the end surface of the head arm 1'.

Furthermore, a lead wire 10 is connected to the head 4 for transmitting and receiving signals to and from the head 4. 11 is an insulating tube that covers the lead wire 10. This insulating tube 11 is attached to a first locking claw 12 provided at the tip of the spring arm 3.
, a second locking pawl 13 provided approximately at the middle of the spring arm 3, and a third locking pawl 14 provided at the base end of the spring arm 3, respectively.

[Problems to be Solved by the Invention] In the conventional example with the above configuration, the spring arm 3 having the head 4 attached to the tip thereof is attached to the head arm 1' via the head block 2. At this time, the insulating tube 11 is locked to the third locking pawl 14 provided at the base end of the spring arm 3, which obstructs the tightening work of the hexagon socket head bolt 9, resulting in poor workability. There is a problem.

Therefore, in order to improve workability, in the above conventional example, the side A of the head block 2 facing the third locking pawl 14 is placed on the other side B.
It is made longer (see FIG. 10) to avoid poor workability caused by the insulating tube 10. However, this length increases the mass of the head block 2. Since the head block 2 is attached to the tip of each head arm 1', there is a problem in that the inertial mass of the carriage increases, which impedes high-speed access.

Further, in each of the locking claws 12, 13, and 14, the winter melon is plastically deformed and the insulating tube 11 is locked.

After that, I fixed it with adhesive. Therefore,
There is also the problem that the number of assembly steps increases.

The present invention has been made in view of the above problems, and its purpose is to provide a carriage for a magnetic disk drive that allows high-speed access, reduces assembly man-hours, and improves workability.

[Means for Solving the Problems] FIG. 1 is a diagram showing the principle of the present invention. In the figure, 21 is a head arm assembly constructed by integrally forming a plurality of head arms 22 stacked at predetermined intervals. 23 is a head for reading/writing data from/to a recording medium; 24 is a spring arm to which the head 23 is attached; and 25 is a head block. This head block 25 includes a spring arm attachment surface 25a to which the base end of the spring arm 24 is attached;
A head arm attachment surface 25b is formed to be attached to the tip of the head arm 22.

The spring arm mounting surface 25a of the head block 25 is provided with a groove 25C through which the lead wire 26 of the head 23 is inserted.

[Function] In the carriage of the magnetic disk device shown in FIG.
The lead wire 26 of the head 23 is inserted through a groove 25c provided in the head block 25, and is locked when the spring arm 24 is attached to the spring arm mounting surface 25a.

[Example] Next, the present invention will be explained in detail using the drawings.

FIG. 2 shows a planar groove structure showing the first embodiment of the present invention, and a third embodiment of the present invention.
The figure is a front view of FIG. 2, FIG. 4 is an overall configuration diagram of this embodiment, FIG. 5 is a perspective view of the head block in FIG. 2, and FIG. 6 is a perspective view of the head block of the second embodiment. , FIG. 7 is a perspective view of the head block of the third embodiment.

First, a first embodiment will be explained using FIGS. 2 to 5. First, in FIG. 4, reference numeral 31 denotes a head arm assembly constructed by integrally forming a plurality of head arms 31' stacked at predetermined intervals. Each head 31'
A head block 32 is attached to the tip of the head. Each head block 32 has a spring arm 33.
A head 34 is attached via. An actuator shaft 35 is attached to the center of rotation of the head arm assembly 31. Reference numerals 36 and 37 denote bearings that rotatably support the head arm assembly 31, with inner rings attached to both ends of the actuator shaft 35 and outer rings attached to the magnetic disk device main body side.

Next, the head block 32 will be explained using FIG. 5. The head block 32 has a spring arm mounting surface 32 in which a spring arm mounting screw hole 32a is drilled.
b, and a head arm mounting surface 32d in which a head arm mounting hole 32c is formed.

Next, in FIGS. 2 and 3, the spring arm 3
The proximal end of 3 is attached to the head block 32 using a screw 38 which is disposed on the spring arm mounting surface 32b of the head block 32 and is threaded into the spring arm mounting screw hole 32a. There is.

On the other hand, the head arm mounting surface 3 of the head block 32
2d is brought into contact with the end surface of the head arm 31',
It is attached using a hexagonal socket bolt 39 that loosely fits into the head arm mounting six 32d and screws into the distal end surface of the head arm 31'.

Furthermore, a lead wire 40 is connected to the head 34 for sending and receiving signals to and from the head 34. 41 is the lead wire 40
It is an insulating tube that covers the This insulating tube 41 is
A first locking claw 42 provided at the tip of the spring arm 33 and a second locking claw 43 provided approximately in the middle of the spring arm 33 are respectively locked.

In this embodiment, as shown in FIG. 5, the insulating tube 41 (lead wire 40) is inserted into the spring arm mounting surface 32b of the head block 32 from the base end of the spring arm 33 in the direction of the head arm 31'. m 32 e is engraved.

According to such a configuration, the insulating tube 41 (
After inserting the lead wire 40), the spring arm 3
3 using screws 38, the insulating tube 41 is locked at the center of the base end of the spring arm 33. Therefore, it does not interfere with the tightening work of the three hexagon socket head bolts.

Also, since it does not interfere with the work of hexagon socket head bolts,
Unlike the conventional example, it is no longer necessary to lengthen the section A of the head block 32, the inertial mass of the carriage can be reduced, and high-speed access becomes possible.

Furthermore, since the number of locking pawls can be increased compared to the conventional example, the number of assembly steps can be reduced without reducing.

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

For example, as shown in FIG. 6, a groove 52e extending from the base end of the spring arm 33 in the direction of the head arm is formed on the spring arm mounting surface 52b of the head block 52.
and a groove 52f provided in a direction substantially perpendicular to the groove 52e may be provided on the side portion of the head block 52.

According to such a configuration, the lead wire 40 is locked on the proximal end m side of the spring arm 33 compared to the conventional example, so that the workability of the three hexagon socket head bolts is improved.

In addition, since it does not interfere with the work of the three hexagon socket head bolts, it is no longer necessary to lengthen the A part of the head block 32 as in the conventional example, and the inertial mass of the carriage can be reduced, allowing high-speed access. becomes.

Furthermore, since the number of locking pawls can be reduced compared to the conventional example, the number of T to be assembled can be reduced. Similarly, as shown in FIG. A groove 62e for guiding the insulating tube 41 (lead wire 40) may be provided on the side.

Even with this configuration, the lead wire 40 is locked on the base end side of the spring arm 33 compared to the conventional example, so that the workability of the hexagon socket head bolt 39 is improved.

In addition, since it does not interfere with the work of the hexagon socket head bolt 39, it is no longer necessary to lengthen the A part of the head pro-took 32 as in the conventional example, and the amount of inertia gt of the carriage can be reduced. Access is possible.

Furthermore, since the number of locking pawls can be reduced compared to the conventional example, the number of assembly steps can be reduced.

[Effects of the Invention] As explained above (7), according to the present invention, a groove is provided on the spring arm mounting surface of the head block, and the lead wire of the head is inserted into the groove, thereby achieving high-speed access. Therefore, it is possible to realize a carriage for a magnetic disk device that can reduce assembly man-hours and improve workability.

[Brief explanation of drawings]

Fig. 1 is a diagram of the principle of the present invention, Fig. 2 is a configuration diagram of the shell showing the first embodiment of the invention, Fig. 3 is a front view of Fig. 2, and Fig. 4 is the overall configuration of this embodiment. Figure 5 is a perspective view of the head block in Figure 2; Figure 6 is a perspective view of the head block of the second embodiment; Figure 7 is a perspective view of the head block of the third embodiment; The figure is a side configuration diagram of a conventional magnetic disk drive, FIG. 9 is an enlarged view illustrating the attachment of the spring arm and head arm in FIG. 8, FIG. 10 is a top view of FIG. 9, and FIG. FIG. 9 is a perspective view of the head block in FIG. 8; In Figures 1 to 7, 21.31 is the head arm assembly, 22.31'
is the head arm, 23.34 is the head, 24.33 is the spring arm, 25.32 is the head block, 25a, 32b are the spring arm mounting surfaces, 25b
, 32e is the head arm mounting surface, 25c, 32e,
52e, 52f, and 62e are full, and 26.40 is a lead wire. , lhJ

Claims (1)

[Claims] A plurality of head arms (2
2), a head (23) that reads/writes data to a recording medium, and a spring arm (2) to which the head (23) is attached to the tip. 24), a spring arm attachment surface (25a) to which the base end of the spring arm (24) is attached, and a head arm attachment surface (25b) attached to the tip of the head arm (22). Block (25)
In the carriage of a magnetic disk device having
A carriage for a magnetic disk device, characterized in that the lead wire (26) of item 3) is inserted into the groove (25c).