JPS63285791A - Floppy disk device - Google Patents

Abstract

PURPOSE:To eliminate the occurrence of trouble caused by dust, etc. and to improve the reliability of a step-motor with simple constitution, by realizing dust-proof constitution in such a way that fresh air is blown into the space between the needle of the step-motor and a cover covering the needle by utilizing the rotation of a spindle motor. CONSTITUTION:A spindle motor 11 is constituted of a spindle rotor 2 provided with a fin 4 on its upper outer periphery and a hub 3 and a linear type step- motor 12 is constituted of a slidable needle 5 and stator 6 which are opposed to the needle 5 with minute intervals and fixed to a frame 1 between two guide rods 7. A dust cover 6 is fitted over the section from the stator 6 side to the supporting section of the needle 5. The wind produced by the fin 4 when the rotor 2 rotates is sent to the space between the needle 5 and cover 9 through an air vent 10 and removes dust, etc., entering the space. Therefore, the occurrence of trouble caused by dust, etc., is eliminated and the reliability of the step-motor can be improved with such simple structure.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a floppy disk device, and more particularly to a floppy disk device having a dust removal function of a linear step motor.

[Prior Art] In a conventional floppy disk device, especially a floppy disk device having a linear step motor, the linear step motor is equipped with a stator in which a coil is wound around a permanent magnet, and a microscopic motor on the stator. The magnetic head is configured with a movable element that moves in parallel while maintaining a gap, and the magnetic head is moved by the linear step motor.

Note that the floppy disk was rotated by a spindle motor.

Furthermore, although there is a minute gap between the movable element and the stator in the linear step motor, the gap is not sealed and is in communication with the outside.

[Problems to be Solved] In the floppy disk device using the conventional linear step motor described above, the movable element and stator of the linear step motor face each other at a certain minute distance, so the rotary step If the rotor is fixed to the stator via a bearing like in a motor, it is difficult for dust to get in, but in a linear step motor, the movable element moves in parallel on the stator, so it is difficult for dirt to get in. Since the linear step motor can only pass through the motor, there is a risk that dirt may get in between the teeth of the mover and stator, and if dirt gets in, the linear step motor will not be able to operate normally, so it is vulnerable to dirt. There was a flash.

In addition, in the above-mentioned linear step motor, a magnetic head carriage is attached to the movable element so that it can be moved, so it is not possible to completely cover it with a cover. The disadvantage is that if you use it in a space with a lot of trash, there is a risk of dirt getting inside.

[Means for solving problems] The present invention was made to solve the above-mentioned problems of the conventional art. In a floppy disk drive, which has a linear step motor for moving a magnetic head, which is composed of a movable element that moves in parallel while maintaining a minute interval, and a spindle motor for rotating a floppy disk, 1. A dust cover is provided to cover the support portion of the movable element, and fins are provided on the outer periphery of the rotor of the spindle motor to blow air into the dust cover to prevent dust.

Embodiments] Next, embodiments of the present invention will be described with reference to the drawings.

1 to 3 are diagrams showing a floppy disk device according to an embodiment of the present invention.

1 in the figure is a subframe, and this subframe 1 has a spindle motor 11 and a linear step motor 12 built into it, and is a frame of a floppy disk device (
(not shown).

The spindle motor 12 is composed of a spindle rotor 2 and a hub 3 for chucking a floppy disk as a recording medium, and fins 4 are provided on the spindle rotor 2 along its outer periphery.

In addition, a linear step motor has two guide rods 7.
It is composed of a movable element 5 that can slide between the movable element 5 via rollers 8, and a stator 6 fixed to the subframe 1 and facing the movable element 5 with a small distance therebetween.

In this linear step motor 12, if dust or the like gets into between the guide rod 7 and the rollers 8 or between the movable element 5 and the stator 6, normal operation will be hindered, so in order to prevent this, the stator 6 side A dust cover 9 is attached to the supporting portion of the movable element 5.

Further, as the spindle rotor 2 rotates, wind is generated by the fins 4 provided on the spindle rotor 2. In order to send this wind into the gap between the movable element 5 and the dust cover 9, a ventilation hole 10 is provided in the subframe 1. It is provided.

Therefore, by closing the gap between the stator 6 and the mover 5 with the dust cover 9, it is possible to prevent dust from entering the gap, and in the unlikely event that dust or the like gets into the gap. In this case, the fins provided on the outer periphery of the spindle rotor 2 are used to blow air into the gap to remove dust and the like.

[Effects of the Invention] As explained above, in the floppy disk device of the present invention, a dust cover is provided from the stator of the linear step motor to the support portion of the movable element, and the rotation of the spindle rotor is further prevented between the stator and the dust cover. By using the fins provided on the outer periphery of the spindle rotor to blow air into the gap, it is possible to prevent dust from interfering with the normal operation of the linear step motor. This has the effect of improving reliability.

Furthermore, since the structure is simple, there is no need to increase the number of parts, and as a result, the above effects can be achieved without increasing costs.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a floppy disk device according to an embodiment of the present invention, FIG. 2 is a side view of FIG. 1 seen from the side, and FIG. 3 is a sectional view taken along line A-A in FIG. 1. . 2 Nissin spindle rotor 4 Nissin 5: Mover 6: Stator 9: Dust cover 10: Ventilation port 11 Nissin spindle motor 12: Linear step motor

Claims (1)

[Claims] A linear step motor for moving a magnetic head, which consists of a stator with a coil wound around a permanent magnet, and a movable element that moves in parallel on the stator at a minute interval, and a spindle motor for rotating a floppy disk. In the floppy disk device, the linear step motor is provided with a dust cover that covers the support portion of the mover from the stator side, and a fin is provided around the rotor of the spindle motor to blow air into the dust cover to prevent dust. A floppy disk device characterized by: