JPH0644679A - Floppy disk device - Google Patents

Abstract

PURPOSE:To obtain a thin type floppy disk device by possessing a vertically extendable and contractable shaft in the rotational center of a medium. CONSTITUTION:When a medium cassette 1 is to be inserted into the disk drive, the cassette 1 is inserted by pressing down a shaft main body 7 of the shaft 2. Therefore, a clearance B between the cassette 1 and a rotor yoke 4 can be diminished. Then, when the cassette l is to be ejected, the cassette 1 is separated from the shaft 2, and the shaft is extended again to be restored to the original state. Moreover, a spring is used for a pressing means, but other than this, such as a leaf spring and an air damper can also be used as equivalently functionable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floppy disk drive.

[0002]

2. Description of the Related Art FIG. 3 shows a conventional example. In FIG. 3, reference numeral 1
Indicates a media cassette such as a 3.5-inch floppy disk cassette, 3 indicates an attraction magnet, 4 indicates a rotor yoke, and 5 indicates a shaft that does not expand or contract. Since the shaft 5 exists when the media cassette 1 is inserted, a clearance A is required between the media cassette 1 and the rotor yoke.

[0003]

However, the above-mentioned conventional example has a drawback that the clearance A between the media cassette and the rotor yoke cannot be shortened in order to make the floppy disk drive thinner.

Therefore, an object of the present invention is to provide a floppy disk drive having a structure in which the clearance between the media cassette and the rotor yoke can be made thin.

[0005]

In order to achieve the above-mentioned object, the present invention adopts a floppy disk drive characterized by having a shaft for media rotation center, which is configured to be vertically expandable and contractible. Is.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described with reference to the drawings. FIG. 1 is a side view for explaining an operation of mounting a media cassette on a floppy disk drive of the present invention, and FIG. 2 is a sectional view of a shaft used in the floppy disk drive.

1 and 2, reference numeral 1 is, for example,
Shows a media cassette such as a 3.5 inch floppy disc cassette, 2 is a shaft, 3 is
A magnet is shown, 4 is a rotor yoke, and 7
Indicates a shaft body of the shaft 2, 8 indicates a receiver for receiving the shaft body 7, and 6 indicates a pressing means, for example, a spring, which is arranged in the receiver and presses the shaft body 7 upward.

When inserting the media cassette 1 into the disk drive, the media cassette 1 is inserted while pushing down the shaft body 7 of the shaft 2. Therefore, the clearance B between the media cassette 1 and the rotor yoke 4 can be made smaller than the clearance A of the conventional example of FIG. When ejecting the media cassette 1, the media cassette 1 separates from the shaft 2, and the shaft extends again to return to the state of FIG.

As the pressing means, in addition to the spring 6 described above, there are leaf springs, air dampers, and the like that have equivalent functions.

[0010]

As described above, according to the present invention,
Since the clearance between the media cassette and the rotor yoke 4 when inserting the media cassette can be made smaller than in the conventional example, a thin floppy disk drive can be obtained.

[Brief description of drawings]

FIG. 1 is a side view for explaining an operation of mounting a media cassette on a floppy disk drive of the present invention.

FIG. 2 is a cross-sectional view of a shaft used in a floppy disk drive.

FIG. 3 is a side view of a conventional floppy disk drive.

[Explanation of symbols]

 1 3.5 inch media cassette 2 expandable shaft 3 attraction magnet 4 rotor yoke 5 conventional shaft 6 spring 7 shaft body 8 receptor

Claims (2)

[Claims] 1. A floppy disk drive comprising a shaft which is vertically expandable and contractible and which is a center of rotation of a medium. 2. The floppy disk drive according to claim 1, wherein the shaft includes a shaft main body, a receiver for receiving the shaft main body, and a pressing means provided on the receiver for upwardly pressing the shaft main body. A floppy disk drive characterized by comprising.