JPH02285565A - Integral carriage for magnetic disk device - Google Patents

Abstract

PURPOSE:To realize the magnetic disk device of high reliability at low cost by dividing an integral carriaage into two parts. CONSTITUTION:In the integral carriage, arms parts 2a-2d..., which are arranged in one line, are divided into a first carriage body 1a and a second carriage body 1b every other step. Accordingly, in the first carriage body 1a, an interval between the arm part 2a and arm part 2c... is made double. On the other hand, even in the second carriage body 1b, an interval between the arm part 2b and arm part 2d... is made double. As a result, when a magnetic head assembling body is fitted to the first and second carriage bodies 1a and 1b and afterwards, the first and second carriage bodies 1a and 1b are linked, a space for work to fit the magnetic head assembling body is enlarged to be double and the operability of the fitting work is widely improved. Thus, the magnetic disk device of the high reliability can be realized at low cost.

Description

[Detailed Description of the Invention] [Summary] In a magnetic disk device used as a file device of a computer system, the present invention relates to a carriage for seeking a magnetic head to a predetermined position, and to facilitate the installation of a magnetic head assembly. The purpose of the mounting is to realize a high-multiplying magnetic disk device at low cost by increasing work productivity. In the integrated carriage that is integrally molded with the carriage, the integrated carriage includes a first and a second carriage body that are divided into two parts along the rotation shaft insertion hole, and the first carriage body has an odd number of The second carriage body has an even-numbered arm part, and the second carriage body has an even numbered arm part.
When the first and second carriage bodies are coupled, the odd-numbered arms and the even-numbered arms are integrally provided so as to spatially overlap.

[Industrial Application Field] The present invention relates to a carriage for seeking a magnetic head to a predetermined position in a magnetic disk device used as a file device of a computer system.

[Conventional technology]

(1) Magnetic disk drive and carriage Magnetic disk drive records/reproduces data by slightly floating a magnetic head facing each surface of multiple magnetic disk media rotating around a spindle axis. be.

Further, the magnetic heads are driven all at once by a common actuator to seek to a sectional position on each surface of the magnetic disk medium.

Conventionally, in order to make multiple magnetic heads seek simultaneously,
A plurality of drive arms are stacked on a carriage provided on the actuator, and a magnetic head assembly is attached to the drive arms.

However, as magnetic disk drives become smaller and their recording densities become higher, the allowable off-track amount of the magnetic head also becomes smaller. It has become difficult to satisfy the amount of trucks.

By the way, the allowable off-track amount in question here is 5μ.
It is about m.

Therefore, in order to solve this problem, an integrated carriage in which the drive arm and the carriage are integrally molded is used.

(2) Integrated carriage Because the integrated carriage has a drive arm and carriage that are integrally molded, there is extremely little mechanical distortion caused by changes in environmental conditions such as temperature or forces such as external loads. The arms can maintain stable relative positions.

FIG. 3 is a perspective view illustrating a conventional integrated carriage.

The integrated carriage 1 shown in the figure is equipped with four arm sections 2, and a magnetic head assembly 5 consisting of a support spring 3 and a magnetic head 4 is fixed to the tip of each arm section 2 with screws 6. be.

In this case, the magnetic head assembly 5 is attached to both sides of the arm section 2, and the magnetic head 4 is made to face both sides of adjacent and facing magnetic disk media using one arm section.

Further, in the figure, the magnetic head assembly 5 is attached only to the uppermost arm section 2, but the magnetic head assembly 5 is attached to all the arm sections 2.

On the other hand, the rotary shaft of the actuator is inserted and fixed into the rotary shaft insertion hole 7, and the magnetic head 4 is sought to a predetermined position on the magnetic disk medium by rotating the rotary shaft of the actuator by a required angle. .

[Problem to be solved by the invention]

However, as magnetic disk devices become smaller and record at higher density, the spacing between magnetic disk media has become narrower, and the spacing between the arm portions 2 has also become narrower.

Therefore, it has become difficult to screw the magnetic head assembly 5 onto the arm portion 2.

FIG. 4 is a side view of the integrated carriage.

The magnetic head assembly 5 is fixed to the arm portion 2 with screws 6. However, the distance d between the arm portions 2 is only about 4 to 5 mm.

That is, it is difficult to insert a screwing tool between the arm parts.

A technical object of the present invention is to solve the above-mentioned problems with conventional integrated carriages, and to easily attach a magnetic head assembly even when the distance between the arm parts is narrow. The object of the present invention is to realize a highly reliable magnetic disk device at a low cost by increasing the reliability of the mounting operation and increasing the productivity of the mounting operation.

[Means for Solving the Problems] FIG. 1 is a perspective view illustrating the basic principle of the present invention.
) is the state diagram before the integral carriage is connected, (b
) is a state diagram in which integrated carriages are connected.

The present invention is characterized in that the integral carriage is divided into two parts.

That is, in an integrated carriage in which a drive arm to which a magnetic head assembly is attached and a carriage that supports the drive arm are integrally molded, the integrated carriage is divided into two parts along the rotary shaft insertion hole 7; A second carriage body is provided, and the first carriage body 1a has odd numbered arm parts 2a, 2C5..., and the second carriage body 1b has even numbered arm parts 2b, 2d.
,... will be provided. Moreover, these arm portions are integrally provided so that the odd numbered arms and the even numbered arms spatially overlap when the first and second carriage bodies 1a and 1b are coupled. It is something.

[Function] The integrated carriage of the present invention has arm portions 2a arranged in a - row.
, arm portion 2b, arm portion 2c, arm portion 2d,...
- It is divided into a first carriage body 1a and a second carriage body 1b at every other stage.

Therefore, in the first carriage body 1a, the distance between the arm portions 2a and 2c is doubled.

On the other hand, also in the second gear ridge body 1b, the arm portion 2
The distance between b and the arm portions 2d... is doubled.

As a result, if the magnetic head assembly is attached to the first and second carriage bodies 1a and Ib, and then the first and second carriage bodies 1a and 1b are connected, attachment of the magnetic head assembly is a simple task. The space is doubled, and the work efficiency of the installation is greatly improved.

(Embodiment) FIG. 2 is a perspective view illustrating an embodiment, in which (a) is a state diagram in which the integrated carriage is separated, and (b) is a state diagram in which the integrated carriage is connected.

In the figure, the magnetic head assembly 5 is attached only to the arm portion 2e, but the magnetic head assembly 5 is attached to all the arm portions with screws 6. After that, the first carriage body 1c and the second carriage body 1d are joined together.

The arm portion is alternately divided into a first carriage body 1c and a second carriage body 1d.

Therefore, the distance between the arm parts becomes longer, and the work of securing the magnetic head assembly 5 with screws can be easily performed.

In this embodiment, the first carriage body IC and the second carriage body 1d are connected using four carriage screws 8a, 8b, 8.
c and 8d.

Therefore, the first carriage body IC has screw holes 9a,
9b, 9c, and 9d are provided, and the second carriage body 1d is fixed to the first carriage body IC using the carriage screws 8a, 8b, 8c, and 8d.

On the other hand, when the first and second carriage bodies 1c and ld are connected, the arm parts 2e and 2g of the first carriage body IC and the arm parts 2f and 2h of the second carriage body 1d are connected. However, arm part 2e, arm part 2
f, the arm portion 2g, and the arm portion 2h are arranged in a line in this order.

Further, the rotating shaft insertion holes 7a and 7b become a cylindrical rotating shaft insertion hole 7, into which the rotating shaft of the actuator is inserted and fixed.

As described above, the integrated carriage of the present embodiment allows the screwing work of the magnetic head assembly to be easily performed, and at the same time, it is extremely easy to connect the first and second carriage bodies. The shape of the surface is also extremely simple.

〔Effect of the invention〕

As described above, according to the present invention, the distance between the arm parts of the integrated carriage can be doubled.

Therefore, while taking advantage of the advantages of the integrated carriage, the mounting of the magnetic head assembly makes it possible to perform the work easily, the mounting increases the reliability of the work, and the mounting increases the productivity of the work. can be increased.

As a result, a highly reliable magnetic disk device can be realized at low cost.

8a, 8b, 8c, and 8d are carriage screws, 9a, 9b, 9c, and 9d are screw holes, and 10 is a punch hole, respectively.

[Brief explanation of drawings]

FIG. 1 is a perspective view illustrating the basic principle of the present invention.
) is the state diagram before the integral carriage is connected, (b
) is a state diagram of the integrated carriages being connected together, Figure 2 is a perspective view for explaining the embodiment, (a) is a diagram of the integrated carriages being separated, and (b) is a state diagram of the integrated carriages being connected. FIG. 3 is a perspective view illustrating a conventional integrated carriage, and FIG. 4 is a side view of the integrated carriage.

Claims (1)

[Claims] An integrated carriage in which a drive arm to which a magnetic head assembly is attached and a carriage that supports the drive arm are integrally molded. comprising divided first and second carriage bodies;
The carriage body (1a) has odd numbered arm parts (2
a), (2c), . 1b). An integrated carriage for a magnetic disk drive, characterized in that the odd-numbered arms and the even-numbered arms are integrally provided so as to spatially overlap when coupled.