JPS63292467A - Disk device - Google Patents

Abstract

PURPOSE:To miniaturize a disk device by providing a step difference part on a head carriage, and fitting to the carriage by opposing the movor of a linear pulse motor and a head by interposing this step difference part. CONSTITUTION:A head carriage 38 has the step difference part 38a bent in a crank shape and an 0 face head 40 is fitted on the upper face near the tip of an 0 face head carriage. In such a structure the movor 14 of the linear pulse motor and the magnetic head 40 are fitted to the head carriage 38 in the form interposing the step difference part 38a of the head carriage 38 and in the case of inserting a disk cassette 20 into the disk device, the tip of the disk cassette 20 becomes in the form opposing to the movor 14 by interposing the step difference part 38a. The movor 14 of the linear pulse motor becomes in the state of being stored in the recessed part formed by the step difference part 38a of the head carriage 38 and an extremely thin head unit is obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disk device, and more particularly to a disk device that drives a head using a linear pulse motor.

[Prior Art] Disk device 1 used in electronic devices such as computers and for recording and reproducing information. For example, in magnetic disk devices, 1 mega type disks are currently mainstream, but 2 mega type disks called 1x density, etc. High-density disks of the 10 mega type or higher are beginning to be used. Recording and reproducing at an ultra-high density of 10 Mega type requires a motor that can be controlled with ultra-precision, and a linear pulse motor has been adopted in place of the conventional lead screw DC motor.

[Problems to be solved by the invention] However, the installation of this linear pulse motor to a disk device is still at the stage of trial and error, and for example, the installation of a head carriage to a linear pulse motor requires extreme care. Therefore, it takes time to locate the position, and furthermore, due to the difference in thermal expansion coefficient between the material of the mover (iron-based) and the material of the carriage (resin such as PC), deviations may occur depending on the usage environment.

Furthermore, as electronic equipment becomes smaller and smaller, it is necessary to make disk devices as small as possible.

What is shown in FIG. 4 is a conventional magnetic recording/reproducing head unit 1, in which a slider 14 of a linear pulse motor is attached to the lower surface of a zero-plane head carriage 2 with a flat lower surface using screws. In addition, 3 is a 0-face head, 4
is a single-sided head, and 5 is an arm that supports the single-sided head.

With such a structure, the moving element 14 of the linear pulse motor is attached to overlap the head carriage 2, which increases the thickness and makes it difficult to downsize.

The present invention was made based on the above-mentioned circumstances, and it is possible to make a disk device equipped with a linear pulse motor as small as possible, and to facilitate positioning of the head unit and the linear pulse motor. The purpose is to provide a disk device with a high level of performance.

[Means for Solving the Problems] In order to solve the above problems, in the present invention, a step is provided in the head carriage, and the mover of the linear pulse motor and the head are mounted facing each other across the step. has been adopted.

[Function] In such a configuration, the head carriage has a stepped portion, and one space formed between the stepped portion is used as a space for storing a head or a disk cassette, and the other space is used as a space for storing a head or a disk cassette. Since the moving element of the linear pulse motor can be accommodated, the overall thickness can be made extremely thin.

In a preferred embodiment, the mounting surfaces of the head carriage and the slider are arranged so that they are approximately on the same plane as the head sliding surface or on a higher surface, and the wall surface of the stepped portion is used as a reference surface when mounting the carriage of the slider. Because of this, it is possible to obtain a head unit that is mounted with high precision and allows for easy positioning.

[Example] The present invention will be described in detail below using an example shown in one drawing.

FIG. 1 shows the entirety of a disk device according to the present invention, and the disk device, which is generally designated by the reference numeral 10 (hereinafter, will be explained by taking a magnetic disk device as an example), includes a linear pulse motor 12, which will be described later. A magnetic head unit 16 attached to the mover 14 of this linear pulse motor, a spindle 18 for driving disk rotation, and the like are provided. A disk cassette 20 shown by a dashed line is inserted into the opening of the disk device 110, and a magnetic disk 22 as a recording medium in the cassette 18 is rotationally driven by a spindle 1B equipped with a drive mechanism (not shown) to drive a magnetic head. Information is recorded or reproduced by the head 24 of the unit 16.

FIG. 2 shows the above-mentioned linear pulse motor 12 in detail, in which mounting plates 28, 28' are provided on both sides of the stator, indicated by the reference numeral 26. Guide plates 30° 30' which are parallel to each other are provided on the movable element side, which will be described later.
, 30', and one guide plate 3
0 is moved relative to the mounting plate 28 and pressed toward the mover 14 by an elastic member, such as a preloading spring 31 (FIG. 1). Further, the guide plate 30' is integrated with a mounting plate 28' that is positioned according to the reference signal. Therefore, the mover 14
is pressed by the preloading spring 31 against the guide plate 30', that is, the movement guide surface of the head unit, and is guided along the reference plane.

In addition, in FIG. 2, only the bolts supporting this pressurized spring are slightly shown. The ball 32 and a roller (not shown) provided on the lower surface of the slider are rotatably supported by a retainer 34, respectively. Teeth are formed on the back surface of the mover 14, and permanent magnets 50. By controlling the current flowing through the coil 51 through the coil 51 and teeth formed on the upper surface of the stator 26 (none of which are shown), the mover 14 is moved to the guide plate 30.31.
You can move back and forth along the

Further, reference numeral 36 indicates a mounting hole for mounting to the disk device main body l using bolts or the like. The mounting hole is formed, for example, as a long hole so that the mounting range can be adjusted.

FIG. 3 shows the detailed structure of the 0/1 plane head unit 18. As is clear from the figure, the head carriage 38 has a stepped portion 38a bent into a crank shape, and a zero-plane head 40 is attached to the upper surface near the tip of the zero-plane head carriage. A single-plane head 24 is attached to the lower surface of an arm 42 that is rotatably supported on the carriage 38 at a position facing the zero-plane radar 40 . A space having a rectangular cross section formed by the carriage 38 and the arm 42 houses a disk cassette 20 indicated by a dashed line in the figure, and the disk 22 is held between the heads 24 and 40. It is inserted in the same state.

Further, on the lower surface of the carriage 3B, the vibrator 14 of the linear pulse motor is connected to the carriage 38 and the slider 14 with its head side end surface in contact with the vertical rising wall of the bent step portion 38a of the carriage 38. They are fixed by fitting bolts 44 into mounting holes 52 formed at positions corresponding to each other.

In such a structure, the stepped portion 3 of the head carriage 38
A moving element 14 of a linear pulse motor and a magnetic head 40 are attached to a head carriage 38 with 8a sandwiched between them. The tip faces the mover 14 with the stepped portion 38a in between. In this way, the moving element 14 of the linear pulse motor is housed in the recess formed by the stepped portion 38a of the head carriage 38, and an extremely thin head unit 16 is obtained.

As shown in FIG. 3, the sliding surface 22a of the head 24.degree. 40 with the disk 22 and the mounting surface 38b of the slider 14 and head carriage 38 may be made substantially on the same plane, or may be mounted to make the head even thinner. The surface 38b is the sliding contact surface 22
It may be positioned higher than a.

Furthermore, the vertical wall surface 38b of the stepped portion 38a can be used as a reference surface when attaching the mover 14 to the head carriage 38. In this case, a semi-cylindrical projection 38c may be provided as shown by dotted lines in FIGS. 3(A) and 3(B), and this may be used as a reference member.

In the above-described embodiment, the carriage 38 is an integral member with a stepped portion, but an L-shaped member and a flat member may be combined to form a carriage with a stepped portion. .

Further, in the above-mentioned embodiments, the explanation has been made using a magnetic disk device as an example, but the present invention is not limited to this and can be applied to other disk devices such as an optical disk device.

[Effects of the Invention] As is clear from the above description, according to one aspect of the present invention, the head carriage is provided with a stepped portion, and the moving element of the linear pulse motor and the head are mounted so as to face each other with the stepped portion sandwiched therebetween. Therefore, the mover can be accommodated in the space formed by the stepped portion, and the thickness can be extremely reduced, resulting in an excellent effect that the disk device can be made smaller.

[Brief explanation of the drawing]

The figures are for explaining one embodiment of the present invention, in which Figure 1 is a top view of a disk device, Figure 2 is a perspective view of a linear pulse motor, and Figures 3 (A) and (B) are side views of a head unit. The figure, bottom view, and FIG. 4 are side views of a conventional head unit. 10... Disk device 12... Linear pulse motor 14... Mover 16... Head unit 20...
Disk cassette 24.40...Head 38...Head carriage 38a...Step part 111!11Xi Figure 2

Claims (1)

[Claims] 1) In a disk device in which a head carriage carrying a head is coupled to a mover of a linear pulse motor to drive the head, the head carriage is provided with a stepped portion, and the linear pulse is transmitted across the stepped portion. A disk device characterized in that a movable element of a motor and a head are mounted on a carriage so as to face each other. 2) The disk device according to claim 1, wherein the head carriage and the slider are mounted so that the mounting surfaces thereof are substantially on the same plane as the head sliding surface or on a plane higher than the head sliding surface. 3) The disk device according to claim 1 or 2, wherein the wall surface of the stepped portion is used as a reference surface when attaching the slider carriage.