JPH0250383A - Floppy disk device - Google Patents

Abstract

PURPOSE:To improve the reliability of the reading/writing of magnetic recording by freely rotatively holding a flame, in which a spindle motor and a step motor are integrally incorporated, in a floppy disk main device around a central axis penetrating a frame gravity center. CONSTITUTION:A plate frame 3, where a spindle motor 10 and a step motor 11 are integrally incorporated, is freely-rotatively held in a main body 1 by fitting parts 7a and 7b, which are orthogonal to the inserting direction of a floppy disk and provided on a G-G line penetrating the gravity center of the plate frame 3, and arm parts 8a and 8b. Consequently, the plate frame 3, whose fitting accuracy is difficult to obtain, can be easily fitted to the plate main body 1, even when a shock or vibrations are applied to the main body 1, the shock and vibrations are not directly applied to the plate frame 3 due to the arm parts 8a and 8b, and the position relation of the spindle motor 10 and the step motor 11 are difficult to change. Thus, the reading/writing of the magnetic recording becomes highly reliable.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a floppy disk device, and more particularly to a floppy disk device in which a spindle motor and a step motor are integrated into a sheet metal frame. In the device, the third
As shown in the figure, a sheet metal frame 17 in which a spindle motor 1° and a step motor 11 are integrated is attached to a floppy disk device main body (hereinafter referred to as the main body) 1 and is completely fixed at four locations with screws 18a to 18d. or
Alternatively, as shown in FIG. 4, the two parts of the sheet metal frame 19 in which the spindle motor 1o and the step motor 11 are integrated are attached at two parts 22a and 22b to the main body 1 and fixed with screws 20a and 20b. There is.

In the latter case, the sheet metal frame 19 and the mounting portions 22a, 22
Since the slit parts 21a and 21b are provided between the sheet metal frame 19 and the slit parts 21a and 21b,
It can be rotated around the tip.

In such a conventional floppy disk device, when the sheet metal frame 17 is completely fixed to the main body 1, distortion will remain in the sheet metal frame 17 unless the mounting accuracy with the screws 18a to 18d is high, and the spindle motor 10
A misalignment occurs in the positional relationship between the magnetic head and the magnetic head (not shown), which adversely affects the reading and writing of magnetic records.In addition, when shocks and vibrations are applied to the main body 1, these shocks and vibrations directly impact the sheet metal frame 17. It has the disadvantage of being added.

The sheet metal frame 19 is attached at two locations at section 22a.

22b to the main body 1 and is rotatable around the tip of the slit portion 21a21b, even if shock or vibration is applied to the main body 1, one sheet metal frame will not
Although M and vibration are not directly applied, the sheet metal frame 19
is the slit portion 21a.

21b vibrates centering around the tip, the amplitude of the vibration is different between the vicinity of the spindle motor 10 and the vicinity of the step motor 11. As a result, one sheet metal frame is bent, and the spindle motor 10 and the step motor 11 (magnetic head) are bent. There is a disadvantage that the positional relationship between the two is shifted, which adversely affects reading and writing of magnetic recording.

The present invention has been made to eliminate the drawbacks of the conventional devices as described above, and even if shock or vibration is applied to the floppy disk device body, the spindle It is an object of the present invention to provide a floppy disk device in which the positional relationship between a motor and a step motor can be prevented from shifting, and high reliability can be achieved in reading and writing magnetic recording.

A floppy disk device according to the present invention includes a frame in which a spindle motor for rotating a magnetic recording medium and a step motor for moving a magnetic head are integrated, and the floppy disk device includes a main body of the floppy disk device. The floppy disk apparatus is characterized by having a holding means for holding the frame in the floppy disk apparatus main body so as to be rotatable about an axis that is perpendicular to the insertion direction of the magnetic recording medium and passes through the center of gravity of the frame.

Next, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a plan view of an embodiment of the present invention. In FIG. 9, a main body 1 of a floppy disk device according to an embodiment of the present invention is made of a thin plate-like material and has a box shape. A front panel 2 is attached which has a slit for inserting a floppy disk.

The sheet metal frame 3 has a mounting section 7 for fixing it to the main body 1.
a, 7b are provided, and the sheet metal frame 3 and the mounting portions 7a, 7b are connected by narrow arm portions 8a, 8b.

The arm portions 8a and 8b pass through the center of gravity of the sheet metal frame 3.
It is provided on the G line and causes twisting when external impact or vibration is applied to the main body 1. These arm parts 8a, 8b
By twisting the sheet metal frame 3 around the G-G line
rotates and then tries to return to its original position.

Therefore, even if W impact or vibration is applied to the main body 1, the impact or vibration is not directly applied to the sheet metal frame 3, and since the sheet metal frame 3 vibrates centering around the arm parts 8a and 8b, the vicinity of the spindle motor 10 step motor 1
There is no difference in the amplitude of vibration near 1.

This eliminates the possibility that the sheet metal frame 3 is bent and the positional relationship between the spindle motor 10 and the step motor 11 (magnetic head) is shifted.

FIG. 2 is a vertical cross-sectional view in the direction of arrows taken along line A-A in FIG. 1. In FIG. It has a spindle motor 10 configured to be attached to a spindle motor 10, a magnetic head holder 6 on which the other magnetic head 14 is attached on a movable element 5a on which one magnetic head 15 is attached, and a magnetic head holder 6 on which the other magnetic head 14 is attached. is stator 5
A step motor 11 that can slide on b is attached.

The sheet metal frame 3 is attached to the main body 1 with fixing screws 16 via spacers 13.

In this way, the spindle motor 10 and the step motor 1
The sheet metal frame 3, which is integrally assembled with the sheet metal frame 1, is attached to the parts 7a, 7b and the arm parts 3a, 8b, which are provided on the G-G line that is perpendicular to the insertion direction of the floppy disk and passes through the center of gravity of the sheet metal frame 3. By holding the sheet metal frame 3 on the main body 1 in a rotatable manner, it is possible to easily attach the sheet metal frame 3 to the main body 1 made of sheet metal, which is difficult to install with precision compared to aluminum die-casting. Even if shock or vibration is applied to the main body 1, the arm parts 8a and 8b
Therefore, shocks and vibrations are not directly applied to the sheet metal frame 3.

Furthermore, even if a shock or vibration is directly applied to the sheet metal frame 3, the positional relationship between the spindle motor 10 and the step motor 11 is difficult to change, so reading and writing of magnetic recording will not be adversely affected. High reliability can be achieved in reading and writing records.

As described above, the present invention provides a frame in which a spindle motor that rotates a magnetic recording medium and a step motor that moves a magnetic head are integrated into a frame that is used to attach a magnetic recording medium to a floppy disk device main body. perpendicular to the insertion direction of
In addition, by holding the floppy disk device in the main body so that it can rotate freely about the axis that passes through the center of gravity of the frame, even if shock or vibration is applied to the floppy disk device main body, the shock or vibration will not be directly applied to the frame. Moreover, it is possible to prevent the positional relationship between the spindle motor and the step motor from shifting, and there is an effect that reading and writing of magnetic recording can be performed with high reliability.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the configuration of an embodiment of the present invention, FIG. 2 is a longitudinal cross-sectional view taken along line A-A in FIG. 1, and FIGS. 3 and 4 are views of a conventional example. FIG. 3 is a plan view showing the configuration. Explanation of symbols of main parts 1...Body 3...Sheet metal frame a a 7b...Mounting part 8b...Arm part 10...・Spindle motor 11...Step motor Fig. 1

Claims (1)

[Claims] (1) A spindle motor that rotates a magnetic recording medium;
A floppy disk device including a frame integrated with a step motor for moving a magnetic head,
The apparatus further includes a holding means for holding the frame in the floppy disk apparatus main body so as to be rotatable about an axis that is perpendicular to the direction of insertion of the magnetic recording medium into the floppy disk apparatus main body and passes through the center of gravity of the frame. Features a floppy disk device.