JPS5814372A - Disc driving device - Google Patents

Abstract

PURPOSE:To improve the running accuracy of a carriage, by providing a preload mechanism which fixes both side rails and is moved incorporatedly with the carriage, in a disc driving device having the carriage run on a center rail. CONSTITUTION:Side rails 3 and 8 are fixed to a base 9 in parallel with a center rail 6 and a preload mechanism 20 is fitted at the opposite side to a bearing 4 of a carriage 5. the mechanism 20 is constituted that a bearing 23 is fitted to the tip of an arm 21 supported to the carriage 5 freely rotatably with a hinge 22 and the base of the arm 21 is depressed downward with a preload compressing spring 24, and the upper end of the compression spring 24 is fixed to the carriage 5. The arm 21 is energized clockwise with the spring 24, the bearing 23 is depressed under the side rail 8 and a preload is provided independently of the position of the carriage 5, allowing to improve the accuracy of run of the carriage.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a disk drive device, and particularly to an improvement for improving the running accuracy of a carriage.

The prior art will be explained with reference to FIGS. 1 and 2.

FIG. 1 is a front view of the carriage traveling system.

The carriage 5 has a center rail 6 almost at its center.
The vehicle is supported by the center rail 6 and runs along the center rail 6. A sight rail 3 is fixed to a pace 9 parallel to the center rail 6, and a bearing 4 provided on one side of the carriage 5 is guided to the lower surface of the sight rail 3.

On the other side of the carriage 5, a sight rail 2 movable below -E is arranged parallel to the center rail 6, and this sight rail 2 is pressed against the bearing lO of the carriage 5 by a compression spring 2 for preloading. It will be done.゛However, if the carriage 5 tilts to the right due to a disturbance, the sight rail 2, which is attached to the base 9 so as to be freely pushed forward, will lift upward while compressing the preload pressure spring 1, causing the carriage 5 to tilt to the right due to the disturbance. It comes to rest when the force and the repulsive force of the preload compression spring l are balanced. However, in this structure, the thickness of the preload acting on the carriage 5 changes depending on the position of the carriage 5.

That is, as shown in FIG. 2 (partial plan view of FIG. 1), the correction spring l is different when the bearing 10 is located at a position aK close to the compression spring 1 and when it is located at a position far from the compression spring l. This causes a difference in the force acting on the carriage 5. Therefore, even if a disturbance of the same magnitude acts on the carriage 5, the carriage 5
There will be variations in the slope. This degrades the running accuracy of the carriage.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks of the prior art and to provide a disk drive device with improved carriage travel 1'lf.

Conventionally, as described above, the structure was such that a preload was applied to one of the movable sight rails. In contrast, in the present invention, both of the sight rails are fixed, and a preload mechanism that moves integrally with the carriage is configured to apply a preload to the carriage between it and one of the sight rails.

An embodiment of the present invention will be described with reference to FIGS. 3 and 4. FIG.

FIG. 3 is a front view showing the carriage traveling system of the disk drive device according to the present invention, and FIG. 4 is an enlarged side view showing the preload mechanism in FIG. 3 in detail.

In addition, on both sides, the same reference numerals are given to the same parts as those in FIG.

Both the sight rails 3 and 8 are fixed to the pace 9 in parallel with the center rail 6. A preload mechanism section is attached to the side of the carriage 5 opposite to the bearing 4. As shown in an enlarged view in FIG. 4, this preload mechanism unit has a bearing attached to the tip of an arm 2I rotatably supported by the carriage 5 by a hinge pin ρ, and a base end of the arm 21. It is structured so that the preload compression spring is pushed downward. The upper end of the compression spring is fixed to the carriage 5, and the lower end thereof is fixed to the arm 2 IC. The arm 21 is biased clockwise by the compression spring 2, and the bearing 23 is pressed against the lower surface of the sight rail 8.

Now, when a disturbance that causes the carriage 5 to tilt to the right in FIG. 3 is applied, the hinge pin ρ moves upward and the arm 4 rotates counterclockwise. The compression spring resists the rotation of the arm 2, and the arm 21 comes to rest due to the angular change in which this repulsive force and disturbance are balanced. Since the preload mechanism moves integrally with the carriage 5, the carriage 5
Even if the position of the compression spring 2 changes, the distance between the compression spring 2 and the bearing field and the hinge pin 4 remains constant. Therefore, if the strength of the disturbance is the same, no matter what position the carriage 5 is in, the angle of the arm 210 at which the repulsion force of the compression spring and the disturbance are balanced is constant. In other words, the inclination of the carriage 5 is constant.

In addition, in FIG. 4, a compression spring U may be placed on the left side of the hinge pin 4 to press the arm 21 upward, or a tension spring may be used instead of the compression spring to push the base end of the arm 210 downward. Pull or Arm 2
You may also try to pull the tip end of 1 upward. In addition to this, a similar action may be performed by K such as a mainspring spring or a leaf spring.

As described above, according to the present invention, a uniform preload can be applied to the carriage regardless of the position of the carriage, so that the running accuracy of the carriage can be significantly improved compared to the conventional art. According to experiments, by applying the present invention, it was possible to easily improve carriage running accuracy to about four times that of the conventional method.

[Brief explanation of drawings]

Fig. 1 is a front view showing a carriage running system of a conventional disk drive device, Fig. 2 is a schematic plan view for explaining the problems of the carriage running system, and Fig. 3 is an embodiment of the present invention. FIG. 4 is a front view showing the carriage traveling system of the disk drive device, and FIG. 4 is an enlarged side view of the preload mechanism of the same embodiment. 3.8...Sight rail, 4.23...Bearing, 5...Carriage, 6...Center rail, addition...
・Preload mechanism, 2]...Arm, ρ...Hinge pin, Required...Compression spring. Representative Patent Attorney Susuki 1) Toshiyuki F. 1C50.

Claims (1)

[Claims] In a disk drive system having a carriage running on a center rail, a specific position of the cough carriage is fixed parallel to the center rail and guides a bearing provided on the core carriage, with the center rail being approximately the center of rotation. a first sight rail that restricts rotation in the direction; a second sight rail fixed in parallel with the center rail;
A disk drive characterized by comprising a preload mechanism that moves integrally with the carriage and applies a preload to the core carriage in a direction to rotate the carriage in the specific direction between the second sight rails. Device.