JPH07134885A - Floppy disc apparatus - Google Patents

Abstract

PURPOSE:To stably record and output/reproduce data at low costs and to make an apparatus thin and highly dense by providing a laser optical system which plastically deforms a base carriage. CONSTITUTION:Displacement sensors 41a, 41b respectively measure distances between loading surfaces 12a of a spindle motor 12 and head surfaces of a magnetic head 20a, and supply measuring results to a control part 45. The control part 45 differentiates tone measuring results thereby to calculate a value. The penetration value is compared with a reference value. A control signal fit for casting conditions is supplied to a laser oscillator 43 in accordance with the comparison result. The laser oscillator 43 sends a pulse laser to a laser optical system 42 in response to the control signal from the control part 45. The laser optical system 42 casts a pulse laser correspondingly to a base carriage 20, thereby plastically deforming the base carriage 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floppy disk device as an external storage device used in a host computer such as a personal computer, a word processor and a workstation.

[0002]

2. Description of the Related Art Conventionally, a floppy disk device for magnetically recording and reproducing such a floppy disk has been considered as described below. FIG. 3 is an explanatory view showing the outline of the internal structure of a conventional floppy disk device.

In the conventional floppy disk device shown in FIG. 3, a base plate 11 which is a base of the floppy disk device, a head carriage 20 slidably provided on the base plate 11, and an elastically supported by the head carriage 20. It has an arm member 21, and the base carriage 20 and magnetic heads 20a and 21b provided at the tip of the arm member 21, respectively.

The base carriage 20 has two oil-impregnated bearing portions 22 formed at the lower end thereof, and the end of the oil-impregnated bearing portion 22 is interlocked with a stepping motor (not shown) to drive the base carriage 20 to slide with respect to the base plate 11. There is provided a screw pin 23 for promoting.

The base plate 11 has a spindle motor 1 for rotating the floppy disk 30.
2 and a guide lot 13 through which the two oil-impregnated bearing portions 22 are inserted. By this guide lot 13, the base carriage 20 is provided slidably with respect to the base plate 11.

A head load spring 24 for applying a load to the arm member 21 and elastically supporting the base carriage 20 at the rear end of the arm member 21.
Is attached.

The operation of the conventional floppy disk device configured as described above will be described.

In the floppy disk device, the floppy disk 30 is placed on the spindle motor 12 and chucked, and the upper surface of the magnetic head 20a provided at the tip of the base carriage 20 and the arm member applied by the head load spring 24. Magnetic head 2 provided at the tip of 21
The floppy disk 30 is sandwiched between the lower surface of 1a and the lower surface.

The floppy disk 30 is rotated according to the drive of the spindle motor 12, and the screw pin 23 is interlocked according to the drive of the stepping motor. The screw pin 23 causes the base carriage 20 to pass through the guide rod 13. It slides on the base plate 11.

In this way, the floppy disk device performs recording and reproduction on the floppy disk 30 by the magnetic heads 20a and 21a.

However, in order for the floppy disk device to obtain a stable reproduction output, the mounting surface 12a of the spindle motor 12 on which the floppy disk 30 is mounted and the magnetic head 20a provided at the tip of the base carriage 20.
It is necessary to adjust the penetration X, which is the distance from the upper surface of the.

Therefore, the penetration X plays an important role in the floppy disk device. FIG. 2 is an explanatory diagram showing the characteristics of the relationship between the penetration X and the reproduction output.

As shown in FIG. 2, in order to obtain a stable reproduction output of the floppy disk device, the penetration X is required to be within the stable output range P.

Therefore, according to the above-mentioned conventional floppy disk device, as shown in FIG. 3, the base plate 11, the spindle motor 12, the guide rod 13, the head carriage 20, and the magnetic head 2 which constitute the penetration X are formed.
By examining the dimensions of a large number of components such as 0a and obtaining the penetration X in the stable output range P, the floppy disk device can perform stable reproduction output.

Further, the load of the head load spring 24 provided at the rear end of the arm member 21 is increased to bring the magnetic head 21b provided at the tip end of the arm member 21 close to the floppy disk 30. The stable output range P of the penetration X can be widened.

Although the importance of the penetration X has been explained in the above-mentioned conventional description, the magnetic head 2
The same applies to all free angle directions of 0a and 21a.

[0017]

However, according to the above-mentioned conventional floppy disk device, since the number of constituent parts forming the penetration X is large, stable output of the penetration X occurs when the dimensional tolerance of each constituent part is accumulated. It is also possible for the situation to fall outside the range P.

In order to overcome such a situation, it is possible to improve the dimensional accuracy of each component and reduce the variation of the penetration X, but there is a problem that the cost of each component becomes very high. It was

When the load of the head load spring 24 provided at the rear end of the arm member 21 is increased to bring the magnetic head 21a provided at the front end of the arm member 21 close to the floppy disk 30, However, the load of the spindle motor 12 rotating the floppy disk 30 increases, and the torque of the spindle motor 12 must be increased, which causes a problem that the cost of the spindle motor 12 becomes very high. .

Further, in view of the recent trend of thinning of the floppy disk device, variations in dimensional tolerances of the components make it easy for the components to interfere with each other, and there is no room in space. There was a point.

The present invention has been made in view of the above problems, and an object of the present invention is to enable stable recording and output reproduction at a low cost, and to be excellent in thinning and high density. It is to provide a floppy disk device.

[0022]

In order to achieve the above object, the present invention provides a spindle motor which mounts a floppy disk on a mounting surface and drives it to rotate, and a recording / reproducing operation in which the floppy disk is sandwiched between the spindle motor and the spindle motor. A floppy disk device having a base carriage equipped with two magnetic heads, wherein the distance between the mounting surface of the spindle motor and the head surface of one of the two magnetic heads is measured and a measurement value is output. Means, plastic deformation means for plastically deforming the base carriage according to a given deformation signal, control means for outputting a control signal based on the measured value, and a signal for generating the deformation signal according to the control signal And generating means.

[0023]

With this structure, the floppy disk device of the present invention can be used even after the floppy disk device is assembled.
By plastically deforming the base carriage by plastic deformation means, it is possible to adjust the penetration and the angle of the magnetic head, so stable recording and output reproduction are possible at low cost, and thinning and high density are achieved. Can correspond to.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A floppy disk device of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view showing the outline of a floppy disk device of the present invention. The same parts as those in the prior art are designated by the same reference numerals, and the description of the configuration and operation thereof will be omitted.

In the floppy disk device of the present invention in FIG. 1, a displacement sensor 41a, which is a measuring means for measuring the distance to the upper surface of the magnetic head 20a provided on the base carriage 20, and a mounting surface 12 of the spindle motor 12.
Displacement sensor 41 which is a measuring means for measuring the distance to a
b, and a laser optical system 4 which is two plastic deformation means for irradiating the front and back surfaces of the base carriage 20 with a pulse laser.
2 and a female connector (not shown) for connecting the displacement sensors 41a and 41b and the laser optical system 42.

As an external connection device for adjusting the penetration X of the floppy disk device, a laser oscillator 43 which is a signal generating means for supplying a pulse laser which is a deformation signal to the laser optical system 42, and the laser oscillator 43 are provided. Laser power supply unit 44 for supplying electric power
And a control unit 45 that is a control unit that controls the laser oscillator 43 according to the measurement results from the displacement sensors 41a and 41b, and the laser oscillator 43 and the control unit 45 that are fitted to the female connector. And a male connector (not shown) to be connected.

In the control section 45, a reference value which is a stable output range P in the penetration X of the floppy disk device and irradiation conditions of the pulse laser are set.

The pulse laser irradiation conditions are the pulse laser irradiation output, the pulse laser irradiation time, the pulse laser irradiation frequency, and the like.

Next, the operation of the floppy disk device of the present invention and the external connection device configured as described above will be described.

To adjust the penetration X after assembling the floppy disk device of the present invention, the male connector of the external connection device is fitted to the female connector of the floppy disk device.

As a result, the displacement sensors 41a and 41b provided inside the floppy disk device start operating, and one displacement sensor 41a measures the distance to the upper surface of the magnetic head 20a provided on the base carriage 20, The other displacement sensor 41b measures the distance to the mounting surface 12a of the spindle motor 12 on which the floppy disk 30 is mounted, and supplies these measurement results to the control unit 45.

The control unit calculates the penetration X by subtracting each measurement result, compares and detects the penetration X and a reference value, and outputs a control signal that matches the irradiation condition according to the comparison result. It is supplied to the oscillator 43.

The laser oscillator 43 is supplied with electric power from the laser power source 44, generates a pulse laser according to the control signal, and supplies the pulse laser to the laser optical system 42. These laser optical systems 42 start irradiation of the pulse laser to the base carriage 20. The base carriage 20 is plastically deformed by the pulse laser.

Further, the control section 45 restarts the detection of the penetration X obtained by plastically deforming the base carriage 20 by the displacement sensors 41a and 41b, and the penetration X has an error from the reference value. If so, the above operation is repeated until the error disappears.

According to the above embodiment, each displacement sensor 41
Measure the current penetration X with a and 41b,
A laser pulse is applied to the front and back surfaces of the head carriage 20 based on an irradiation condition such that the penetration X stays within the stable output range P, and the head carriage 20 is plastically deformed so that the floppy disk device is assembled. Even if there is, the penetration X can be adjusted.

Therefore, since the penetration X can be adjusted after the floppy disk device is assembled without changing the dimensional accuracy of a large number of components in the penetration X and the load on the spindle motor 12, stable recording and recording at low cost can be achieved. It is possible to manufacture an excellent floppy disk device capable of output reproduction and capable of being made thinner and having a higher density.

In the above embodiment, the adjustment of the penetration X has been described, but the magnetic heads 20a, 2
The same applies to the angle adjustment of 1a, and the magnetic head 2 is a constraint for increasing the density after assembling the floppy disk device.
Since the angles of 0a and 21a can be adjusted, a higher density of the floppy disk device can be achieved.

Although the displacement sensor 41a is arranged to measure the height from the upper surface of the magnetic head 20a provided on the head carriage 20, the height from the vicinity of the magnetic head 20a is measured. May be.

Further, in the above embodiment, the control unit 4
5, the laser oscillator 43 and the like are externally connected devices, but may be provided inside the floppy disk device.

[0040]

According to the floppy disk device of the present invention constructed as described above, the penetration or the angle of the magnetic head can be adjusted without changing the dimensional accuracy of the components or the load of the spindle motor. ,
Stable recording and output reproduction are possible at low cost, and it is possible to support thinning and high density.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a floppy disk device of the present invention.

FIG. 2 is a characteristic diagram of penetration and reproduction output in a floppy disk device.

FIG. 3 is a schematic perspective view of a conventional floppy disk device.

[Explanation of symbols]

 12 spindle motor 12a mounting surface 20 base carriage 20a magnetic head 21a magnetic head 30 floppy disk 41a displacement sensor (distance measuring means) 41b displacement sensor (distance measuring means) 42 laser optical system (plastic deformation means) 43 laser oscillator (signal generation) Means) 44 Control Unit (Control Means)

Claims (2)

[Claims] 1. A floppy disk device comprising a spindle motor for rotatively driving a floppy disk on a mounting surface and a base carriage having two magnetic heads for sandwiching the floppy disk for recording and reproducing. There is a measuring means for measuring the distance between the mounting surface of the spindle motor and one of the two magnetic head surfaces and outputting the measured value, and plasticizing the base carriage according to a given deformation signal. A floppy disk device comprising: a plastic deformation means for deforming, a control means for outputting a control signal based on the measured value, and a signal generating means for generating the deformation signal according to the control signal. 2. The floppy disk device according to claim 1, wherein the control means and the signal generating means are separable from each other.