JPS62170080A - Linear access mechanism for information storage device - Google Patents

Abstract

PURPOSE:To attain thin-walled and high-speed accessing by applying a linear guiding means to a support carries itself. CONSTITUTION:A base 1 installed with the entire access device, a support carrier 2 supporting a head and moving it, a couple of fixed guides 3 supporting the support carrier 2 reciprocated straightforward, a rolling ball 4 clipped between the support carrier 2 and the fixed guide 3 and a waving plate spring 5 between the base 1 and the fixed guide 3 are provided. A V-shaped slot is cut on each side face of the fixed guide 3 toward the support carrier 2 and the support carrier 2 is reciprocated straightforward by the rolling of some balls 4 clipped in the slots. In order to eliminate play produced among the support carrier 2, the balls 4 and the fixed guide 3, the waving plate spring 5 is provided between either the base 1 or the pair of fixed guides 3 to apply pressure.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an access mechanism for an information storage device, and more particularly to an access mechanism that is thin and capable of high-speed access and precise positioning.

[Conventional technology]

A conventional device of this type is disclosed in, for example, Japanese Patent Application Laid-Open No. 59-21057.
As described in Publication No. 5, a coil of a linear motor is wound around a thin cylindrical carriage, and the cylindrical carriage is moved linearly via a suitable air bearing. By stacking them in parallel, they formed a multi-position access mechanism that could independently read and write information on each side of multiple disks.

[Problem that the invention seeks to solve]

In a conventional linear access mechanism, only the head, arm, and carriage fit between the disks due to the shape of the mechanism.

This caused the arm to extend too far and become unstable when reading information near the center of the disk.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a linear access mechanism for an information storage device that is thin, allows high-speed access, allows precise head positioning, and maintains stability in linear motion.

[Means for solving problems]

The linear access mechanism of the present invention is configured to linearly guide a support carrier that also serves as an arm and a carriage. It is also characterized by the adoption of a preloading method that eliminates the gap between the support carrier, the rolling ball, and the fixed guide by using a fine wavy leaf spring.

[Effect]

By implanting as described above, the access mechanism becomes thinner, lighter, and simpler, and the base on which the support carrier is installed can also be inserted between the disks.

In addition, the preloading method uses a fine wave-like leaf spring to eliminate the gap between the support carrier, the rolling ball, and the fixed guide, eliminating play between the support carrier, the rolling ball, and the fixed guide.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

Figure 1 is a front view of this access mechanism, Figure 2 is the n of Figure 1.
-n' line sectional view.

In Figures 1 and 2, 1 is a base on which the entire access mechanism is installed, 2 is a support carrier that supports and moves the head, 3 is a pair of fixed guides that support the support carrier 2 that reciprocates in a straight line, and 4 is a support. A ball for rolling sandwiched between the carrier 2 and the fixed guide 3, 5 is the base 1 and the fixed guide 3
It is a wavy leaf spring installed between the

V-shaped grooves are cut on both sides of the support carrier 2 and on each side of the fixed guide 3 facing the support carrier 2, and several balls 4 sandwiched between these grooves can roll. The support carrier 2 is caused to reciprocate and linearly move. Note that a holding plate is sandwiched between the support carrier 2 and the fixed guide 3 to prevent the ball 4 from rolling out.

Further, in order to eliminate play between the support carrier 2, the ball 4, and the fixed guide 3, there is a gap between the base 1 and one of the pair of fixed guides 3.

A leaf spring having a wave-like shape is provided to provide a preload.

According to this embodiment, the access mechanism can be made thinner and lighter, and by providing an access mechanism in which this access mechanism is stacked in multiple layers as shown in Figure 3, information can be read and written independently on each disk surface. This makes it possible to achieve faster access.

In addition, by using a finely wavy plate spring for preloading, force is uniformly applied to the entire contact surface between the fixed guide 3 and the base 1, and the running when the support carrier 2 of the head moves linearly is reduced. Stability is maintained. In addition, this access machine
The lIη preloading method eliminates play between the support carrier 2, the ball 4, and the base 1, and achieves precise positioning of the head.

A multi-position access mechanism that allows information to be output independently on multiple disk surfaces is extremely effective for high-speed access of information storage devices. V between fixed guides
The access mechanism, in which a groove is provided and a rolling ball is inserted between the grooves and the support carrier itself reciprocates in a straight line, is considerably lighter.

A thin structure is achieved, and these are extremely effective in stacking them to construct a multi-position access mechanism.

Also, as conventional preloading means, a leaf spring with only one convex portion was used to apply preload to the guide, or this method did not allow for unevenness between the parts of the guide that are strongly applied and the parts that are not. This caused an unbalanced situation when the carriage extended far beyond the guide. However, by using a finely wavy plate spring having at least two convex portions as in this embodiment, force is applied uniformly to the entire contact surface between the fixed guide and the base on which the entire access mechanism is installed. No unevenness of force occurs on the contact surface. Therefore, the above-mentioned imbalance in the way the force is applied is avoided, and stable reciprocating linear movement of the support carrier that supports and moves the head is guaranteed. In addition, since imbalances in the way preload is applied during running can be avoided, the stroke width mechanism can be made thinner than conventional devices. Since a position access mechanism can be formed, high-speed access can be achieved. In addition, by applying preload using a finely wavy leaf spring, play between the support carrier that moves linearly, the rolling ball, and the fixed guide is eliminated, making running stable and smooth, and increasing the accuracy of head positioning.

[Brief explanation of drawings]

Fig. 1 is a front view of an embodiment of the present invention, Fig. 2 is a sectional view taken along the line n-11' in Fig. 1, and Fig. 3 is a partially cutaway view of the linear access mechanism of the present invention inserted into a disk. FIG. DESCRIPTION OF SYMBOLS 1... Base, 2... Support carrier, 3... Fixed guide, 4... Ball, 5... Wavy plate spring, 6... Disc, 7... Head
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Claims (1)

[Claims] 1. An access mechanism for an information storage device comprising a head for reading information from or writing information on a magnetically or optically recorded information medium, and a support carrier that supports the head. An access mechanism for an information storage device, characterized in that the support carrier itself is provided with linear guide means. 2. The linear guide means includes a hollow base, a pair of fixed guides disposed within the base to guide the linear movement of the support carrier, support of both sides of the support carrier, and the pair of fixed guides. 2. The access mechanism for an information storage device according to claim 1, further comprising a groove provided on the side facing the carrier, and a ball for rolling disposed in the groove. 3. The access mechanism for an information storage device according to claim 2, wherein the preload means provided on the linear guide means is constituted by a wavy leaf spring having at least two convex portions. .