JPH0612801A - Disk device - Google Patents

Abstract

PURPOSE:To decrease resistance at the time of unload seeking, and to make the device thin in size without raising the torque of a stepping motor by composing a head arm supporting part of a rotatable roller member. CONSTITUTION:A head arm 3 is integrally formed with an arm supporting piece 3a as in the conventional manner, and the arm supporting part of the arm supporting piece 3a is composed of a roller 1 and an E ring 2. In this constitution, when a head unit 4 becomes unload state, a cassette guiding 5 pushes up the roller 1. When seeking is executed in this state, the shaft 1 rotates and rolls on the upper surface of the cassette guiding 5a. Consequently, by using the roller 1 at the arm supporting part, the resistance of load at the time of moving on the surface of a cassette guiding 5a is decreased. Also, since the arm supporting part is prevented from being worn in durability, the reliability is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head support mechanism in a disk device.

[0002]

2. Description of the Related Art FIG. 7 is a front view showing a head built-in state in a conventional disk device, and FIG. 8 is a plan view showing the head built-in state. 7 and 8, reference numeral 11 indicates a head unit. The head unit is composed of a head arm 10 and a carriage 6. Reference numeral 7 denotes a spring for urging the head arm 10 toward the carriage, 5 denotes a cassette guide for holding the cassette, and the cassette guide is lowered and raised by inserting and ejecting the cassette. 5a
Indicates the upper surface of the cassette guide.

The head arm 10 is integrally formed with an arm support piece 10a supported by the upper surface of the cassette guide. The arm support piece 10a is supported by the upper surface of the cassette guide and holds the head arm upward when the head is unloaded by the automatic calibration of the drive. Here, the auto-calibration refers to an operation of returning the head to the reference position (00 position) when the FDD (floppy disk drive) is powered on. Reference numeral 8 indicates a stepping motor for moving the carriage 6, and 9 indicates a stepping motor 8 and a base supporting a guide bar for guiding the carriage 6.

[0004]

However, according to the above-mentioned conventional disk device, since the head arm and the arm supporting piece are integrally formed, the arm supporting piece moves while rubbing the upper surface of the cassette guide during the automatic calibration. However, this causes resistance (friction). As a result, there are the following drawbacks.

(1) A stepping motor capable of generating a sufficient torque even with respect to the resistance between the arm supporting piece and the upper surface of the cassette guide is required. To generate sufficient torque, the diameter of the stepping motor must be increased, which is an obstacle to making the FDD thinner. Also,
Increasing the exciting current to increase the torque is not preferable in terms of power saving.

(2) When the carriage is unload-seeked, the arm support piece 10a is abraded by the friction between the arm support piece 10a and the upper surface of the cassette guide, and the gap between the head 0 surface and the head 1 surface is reduced. There is a risk that the cassette shutter will contact the one-sided head. In order to solve the above drawbacks, the resistance between the arm support piece and the upper surface of the cassette guide must be reduced, and the surface accuracy of the contact portion must be improved as much as possible.

Accordingly, it is an object of the present invention to provide a disk device which solves the above-mentioned drawbacks.

[0008]

In order to achieve the above object, the present invention provides a carriage supporting one head and a head arm rotatably supported with respect to the carriage and supporting the other head. And a head arm having a support portion for supporting the head arm on a cassette guide, the disk drive is characterized in that the support portion is composed of a rotating member. .

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described with reference to FIGS. 1 is a front view of a head support mechanism of the present invention, FIG. 2 is a plan view of the head support mechanism of the present invention, and FIG. 3 is a front view of a head support mechanism in a head-loaded state. 4 is a perspective view of the head arm of the present invention, FIG. 5 is a view of the arm supporting portion taken along arrow M in FIG. 4, and FIG. 6 is a line A of FIG. 4 in the arm supporting portion.
It is a -A 'sectional view. The same parts as those in the conventional example are designated by the same reference numerals, and the description thereof will be omitted.

1 to 6, the head arm 3 is
Like the conventional head arm, it is integrally formed with the arm support piece 3a. As shown in FIGS. 5 and 6, the arm support piece constitutes an arm support portion by the roller 1 and the 1E ring 2. . As shown in FIGS. 1 and 2, when the head unit 4 is in the unloading state, the cassette guide 5 pushes the roller 1 upward. When a seek is performed in this state, the roller moves while rolling on the cassette guide upper surface 5a. As described above, by using the rollers in the arm support portion, the load (resistance) at the time of unloading when moving the upper surface of the cassette guide can be reduced.

[0011]

As described above, according to the present invention,
Since a rotatable roller member is used for the arm support, the resistance at the time of unload seek is reduced, the stepping motor torque is not required to be increased, and the thin cassette of the disk device is easy. Further, the durability is not worn and reliability is improved.

[Brief description of drawings]

FIG. 1 is a front view of a head support mechanism of the present invention.

FIG. 2 is a plan view of a head support mechanism of the present invention.

FIG. 3 is a front view of a head supporting mechanism in a head-loaded state.

FIG. 4 is a perspective view of a head arm of the present invention.

FIG. 5 is a view of the arm supporting portion as seen from the direction of arrow M in FIG.

6 is a line A- of FIG. 4 in the arm support.
It is an A'sectional view.

FIG. 7 is a front view showing a head built-in state in a conventional disk device.

FIG. 8 is a plan view showing a state in which the head is incorporated.

[Explanation of symbols]

 1 roller 2 E ring 3 head arm 3a arm support piece 4 head unit 5 cassette guide 5a cassette guide upper surface 6 carriage 7 spring 8 stepping 9 base 10 head arm 10a arm support piece 11 head unit

Claims (1)

[Claims] 1. A carriage supporting one head,
In a disk device having a head arm rotatably supported with respect to a carriage and supporting another head, the head arm having a support portion for supporting the head arm on a cassette guide, the support portion being rotatable. A disk device comprising a member.