JPS63110949A - Linear type actuator for magnetic disc apparatus - Google Patents

Abstract

PURPOSE:To enable the span of life of rails to be lengthened with simple work, by fixing circular rails on V-grooves with plate springs, and by fitting drivers on groove sections on the rail end surfaces, to rotate the rails to obtain the new rail running surfaces. CONSTITUTION:Rails 12, 13 for an actuator are made circular, and are rotatably fixed on V-grooves with plate springs 9. On the end surfaces of the circular rails 12, 13, grooves 28 or the like on which the tools of drivers or the like can be fitted are arranged. When the circular rails 12, 13 are abraded, then the rails 12, 13 are rotated with the tools of the drivers or the like through the external section of an apparatus, so that the new running surfaces may be obtained.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an actuator section of a magnetic disk device.

In particular, the present invention relates to a structure suitable for a linear actuator in which a bearing runs on a round rail.

[Conventional technology]

In general, the lifespan of a magnetic disk drive is determined by the lifespan of the Akcheny circle. In particular, since the bearing of a linear actuator reciprocates on the rail, the service life of the linear actuator depends on the degree of wear on the rail. In recent years, actuator speeds have increased due to shorter access times, and rail wear has also increased. Therefore, the solution was to replace the rails in order to extend the life of the equipment. In addition, related to this type of equipment is USF 4415941.
No. 3, but the service life of the rail was not taken into consideration.

[Problem that the invention seeks to solve]

The above-mentioned conventional technology does not take into account the lifespan due to rail wear, and when the life of the device reaches the end due to rail wear, the solution is to take the device back to the factory and replace the rail. This exchange was a time-consuming and expensive process. (This is generally called an overhaul.) The purpose of the present invention is to extend the service life of a magnetic disk device even when the rail life has reached its end, by a simple operation that can be carried out on-site, and without replacing any parts. The purpose is to provide a structure that can be measured.

[Means for solving between points]

The above purpose is to use a round rail for the actuator.

The round rail is fixed with a rotatable structure (for example, a structure in which it is held down by a plate spring in the groove), and a groove, etc., into which a tool such as a screwdriver can be engaged is provided on the end surface of the round rail, so that the rail is not worn out. In this case, this is accomplished by rotating the rail from outside the device with a tool such as a screwdriver to obtain a new rail running surface. It is clear that the same effect as the conventional method of replacing a new rail can be obtained with a very simple operation (turning a screwdriver).

[Effect]

The round rail of the present invention is fixed in a V-groove with a leaf spring, and can be rotated by fitting a driver into the groove on the end surface of the rail. ■Since the rail center does not move even if it is rotated due to the groove, there is no problem with the running accuracy of the actuator.

In addition, in order to insert the screwdriver from outside the device, there is a hole in a part of the outside wall of the device that can be opened and closed with a rubber plug, etc., but in order to minimize the intrusion of dust from the outside of the device, this work can be done quickly. It is desirable to implement this.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a perspective view showing an actuator section of the present invention. The magnetic disk 3 coated with a magnetic recording medium uniformly is rotated at a constant rotation by a spindle motor (not shown). At this time, due to the pressure of the air viscous flow generated on the surface of the magnetic disk 30 and the action of the load arm 2 that presses the magnetic head 1, the magnetic head 1 maintains a small gap with the surface of the magnetic disk 30 and flies stably. The magnetic head 3 is attached to a carriage 18 via the load arm, and is moved and positioned to a predetermined track by the carriage 18. Next, the actuator mechanism, which is a feature of the present invention and includes the present carriage 18, will be explained. A pair of U-shaped grooved bearings 11 are fixed to the side surfaces of the carriage 18 by pins 21, and a U-shaped grooved bearing 10 is provided on the other side surface via a preload plate spring 6. Due to the action of the preload bearing 10, the carriage 18 is stably held between the left round rail 12 and the right outer rail 130 via the pair of bearings 11, and is movable only in the radial direction of the magnetic disk 30.

These round rails 12 and 13 are each fixed to a V-groove provided in the base 16 by a pair of leaf springs 9 and screws 8, and a driver groove 28 provided on the end surface of each rail 12 and 13 is fixed to the base 16. By turning with a screwdriver or the like (see FIG. 2), it is possible to rotate the rails 12, 13 without twisting the center positions of the rails 12, 13. Further, a magnetic circuit 23 having a pair of permanent magnets 22 is attached to the rear of the pace 16, and a coil 17 that is combined with the main magnetic distortion circuit 23 and generates a driving force is bonded to the rear surface of the carriage 18.

Further, a terminal wire 19 of the coil 17 is connected to a flexible power supply line 5 fixed to the upper surface of the carriage 18 by a plate 20. The power supply line 5 is also connected to the signal line 7 of the magnetic head 1 described above, and is connected to the host device via the connector 4.

〔Effect of the invention〕

According to the present invention, even when the bearings 10 and 11 run on the surfaces of the guide rails 13 and 12, and the rail surfaces wear out and reach the end of their service life, as shown in FIG. By inserting a screwdriver 27 into the provided adjustment hole 25 (remove the cap 24 for adjustment) and turning the groove 28 by about 10 degrees, the rail 1
Bearings 10, 11 with new wear-free surfaces of 2 and 13
can be brought into contact with.

Therefore, it is clear that it is possible to achieve the same effect as the conventional method of replacing rails with a very simple operation, eliminate the need for overhaul work, and greatly improve the maintainability of the equipment. It is.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG. 2 is an external perspective view of an apparatus showing an embodiment of the invention. 1...Magnetic head, 2...Low)" 7-
3...Magnetic disk, 4...Connector, 5...
・Flexible power supply line, 6... Leaf spring, 7... Head signal line, 8
...screw, 9...plate spring, 10...
Preload bearing, 11... Bearing, 12... Rail,
13...Rail, 14...Mounting hole,
15...Magnetic circuit mounting hole, 16...Pace, 1
7... Coil, 18... Carriage, 19... Coil terminal, 20... Plate, 21... Pin, 22... Permanent magnet, 23... Magnetic circuit, 24... Cap , 25...adjustment hole, 2
6...Disk device, 27...Driver. 10th

Claims (1)

[Claims] A magnetic disk drive comprising a magnetic disk, a spindle section for rotating the magnetic disk, a magnetic head and an actuator section for positioning the magnetic head, wherein the actuator section is composed of a round rail and a bearing running on the round rail, and further A linear actuator for a magnetic disk drive, characterized in that the round rail is fixed in a rotatable structure, and when the rail is damaged due to wear or the like, the rail is rotated to obtain a new rail running surface.