JPS61122965A - Head supporting mechanism of floppy disk device - Google Patents

Abstract

PURPOSE:To enhance an accuracy in adjustment of an amount of protrusion of a magnetic head by connecting the magnetic head of a carriage side to the carriage through a parallel leaf spring and disposing a vertical movement minutely adjusting screw for moving the head vertically at a lower surface side of the parallel leaf spring. CONSTITUTION:While detecting signal outputs from magnetic heads 11 and 12 holding a floppy disk 10 from both surfaces thereof under a predetermined contact pressure, the magnetic head 11 of a carriage 14 supported movably vertically and in parallel through a parallel spring 13 is moved in parallel and vertically by means of a vertical movement minutely adjusting screw 17 disposed on a lower surface side of the carriage 14. When an output signal is the most stable, the vertical movement minutely adjusting screw 17 is fused or fixed by means of a thermal method such as laser or a soldering. In this manner, an accuracy in adjustment of an amount of a protrusion of the magnetic head can be enhanced without an accuracy in working of parts.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a head support mechanism for a floppy disk drive.

Conventional technology In recent years, floppy disk devices have become smaller and lighter.

With the trend toward higher density capacity, a highly accurate adjustment method for the amount of protrusion of the fixed side magnetic head is expected as a way to stabilize signal output during recording and reproduction.

Hereinafter, an example of the magnetic head protrusion amount adjustment mechanism of the conventional floppy disk device mentioned above will be explained with reference to the drawings.

Figure 2 shows the adjustment mechanism for the amount of protrusion of the magnetic head of a conventional floppy disk device.
is a floppy disk.

2.3 is a magnetic head that holds the floppy disk 1 under a predetermined contact pressure from both sides; 04 is a carriage that holds the magnetic head 3; and a device base (not shown).
It is supported in such a way that it can reciprocate. magnetic head 2
is fixed via a gimbal (not shown) to the tip of an arm 6 rotatably coupled to the carriage 4 via a plate spring 6.

The operation of the head support mechanism of the floppy disk device constructed as described above will be described below with reference to FIGS. 2 and 3.

Normally, the amount of protrusion of the magnetic head 3 is set to zero so that the lower surface side of the floppy disk 1 and the upper end surface of the magnetic head 3 on the fixed side come into contact with each other without deforming the floppy disk 1 in an out-of-plane direction.

The protrusion amount δ of the magnetic head 3 is positive when the magnetic head 3 protrudes toward the floppy disk 1 side, and negative when the magnetic head 3 protrudes toward the floppy disk 1 side.

Further, the protrusion amount δ of the magnetic head 3 is usually set in the range of several tens of μm to several hundred μm.

In order to adjust the amount of protrusion of the magnetic head 3 in the above configuration, the relative position between the upper end surface of the magnetic head 3 and the lower surface of the 70-tip disk is usually set according to the processing accuracy of the parts, such as the magnetic head and the carriage. A method is being adopted to do so.

Problems to be Solved by the Invention However, in the above configuration, when a resin molded product such as the carriage 4 is used, the machining accuracy of the parts is generally low, and the protrusion amount δ of the magnetic head 3 depends on the part precision. The problem was that highly accurate adjustment was difficult.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention provides a floppy disk device in which the protrusion amount of a magnetic head can be adjusted extremely accurately and with high precision without depending on the processing precision of the parts.

Means for Solving the Problems In order to solve the above problems, the present invention couples the magnetic head on the carriage side to the carriage via a parallel plate spring, and provides a vertical movement fine adjustment screw for moving the head in the vertical direction. is attached to the bottom side of the parallel leaf spring.

Function The present invention detects the signal output of a magnetic head that holds a floppy disk on both sides under a predetermined contact pressure, while the carriage side is supported so as to be movable in the vertical direction via parallel plate springs. Move the magnetic head vertically using the vertical fine adjustment screw provided on the bottom side of the parallel plate spring, and when the output signal becomes most stable, turn the vertical fine adjustment screw into the linearizer or solder. It is fused or fixed using a thermal method.

As a result, it is possible to adjust the protrusion amount of the carriage-side magnetic head extremely accurately and with high precision without depending on the processing accuracy of the parts.

Embodiment The following is a description of a magnetic head of a floppy disk device according to an embodiment of the present invention.

In FIG. 1, 1o is a floppy disk. 1
1.12 is a magnetic head that holds the floppy disk 10 from both sides under a predetermined contact pressure. Reference numeral 13 denotes a parallel plate spring that supports the magnetic head.One end of the parallel plate spring 13 is fixed to a carriage 14 by a dowel 18. The magnetic head 12 is fixed via a gimbal (not shown) to the tip of an arm 16 rotatably coupled to the carriage 14 via a plate spring 16. Further, the vertical movement fine adjustment screw 17 provided on the lower surface side of the carriage 14 supports the magnetic head 11 via the parallel plate spring 13 in a state where the magnetic head 11 can be moved in parallel in the vertical direction by bending the parallel plate spring 13. ing.

Next, the operation of the configuration of this embodiment will be explained. First, a floppy disk 1o is held between both sides under a predetermined contact pressure, and while detecting signal outputs from magnetic heads 11 and 12, the floppy disk 1o is supported via a parallel plate spring 13 so as to be able to move vertically in parallel. The magnetic head 11 on the carriage 14 side is moved in parallel in the vertical direction by the vertical movement fine adjustment screw 17 provided on the lower surface side of the carriage 14, and when the output signal becomes most stable, the vertical movement fine adjustment screw 17 is moved in parallel.
are fused or fixed using a thermal method such as a laser or solder.

Effects of the Invention As described above, the present invention detects the signal output of the magnetic head clamped under a predetermined contact pressure from both sides of the floppy disk, and connects the magnetic head on the carriage side to the magnetic head via the parallel leaf spring. The magnetic head coupled to the carriage is moved up and down using the vertical fine adjustment screw provided on the underside of the carriage, and when the output signal becomes most stable, the vertical fine adjustment screw is heated using a thermal method such as a laser or solder. Fusing or fixing. As a result, it is possible to adjust the protrusion amount of the carriage-side magnetic hexagon very accurately and with high precision without depending on the processing accuracy of the parts.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a head support mechanism of a floppy disk device according to a detailed embodiment of the present invention, FIG. 2 is a side view showing a head support mechanism of a conventional floppy disk device, and FIG. 3 is a side view showing a head support mechanism of a conventional floppy disk device. FIG. 1o...Floppy disk, 11.12...
...magnetic head, 14...carriage, 1
5...Plate spring, 16...Arm, 17
... Vertical fine adjustment screw, 18 ... Set screw, 19 ... Magnetic head biasing spring, 20 ...
... Set screw, 21 ... Holding plate. Name of agent: Patent attorney Toshio Nakao and 1 other person
l Figure 2 Tomi 311

Claims (1)

[Claims] This is a head mechanism that performs recording and playback by holding a floppy disk from both the upper and lower sides.The arm has an upper magnetic head mounted on the front end, and a lower magnetic head is mounted on the front end via a parallel leaf spring. a floppy disk device comprising: a carriage that supports the arm in a movable state and rotatably supports the arm at its rear end via a leaf spring; and a vertical movement fine adjustment screw that slightly moves the parallel spring in the vertical direction. head support mechanism.