JPH01317290A - Floppy disk device - Google Patents

Abstract

PURPOSE:To eliminate relative position deviation between the upper and lower heads produced before and after alignment control and to decrease control manhour by drilling a control hole through a leaf spring and forming a hole to a fixed carriage as a fulcrum of a control jig. CONSTITUTION:A jig fulcrum hole 14c containing a fulcrum round hole 14d through which a tip 19a of a square pillar-shaped jig 19 is inserted is formed at the bottom part of a fixed carriage 14 at a position near a screw hole 14b. While a control square hole 12b through which the jig 19 is inserted is formed to the leaf spring 12 at a position opposite to the hole 14c and in a smaller size than the hole 14c. Thus the jig 19 is inserted to the hole 14c of the carriage 14 and the inside of the hole 12b of the spring 12 can be pushed horizontally by the side surface of the jig 19. As a result, the position control is attained between the upper end lower heads 10 and 13 without unfastening a screw 16. Thus it is not required to control again the position deviation between both heads 10 and 13 by fastening the screw 16 again. Then the control manhour is decreased.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention particularly relates to a mechanism for adjusting the relative positions of upper and lower heads (hereinafter referred to as an alignment adjustment mechanism) in a magnetic disk recording/reproducing device used in various OA equipment. The present invention relates to a floppy disk device equipped with a floppy disk device.

2. Description of the Related Art A conventional alignment adjustment mechanism of a floppy disk device is shown in FIGS. 4 to 6.

Figure 4 is a top view of the main parts centering on the carriage part, Figure 5
The figure is a side sectional view of the carriage, and FIG. 6 is a perspective view showing the adjustment state of the upper head.

3 to 77 According to the figure, 1 is an upper head, 2 is a movable carriage on which this upper head is mounted, this movable carriage 2 is fixed to a leaf spring 3, and this leaf spring 3 is mounted on a lower head 4. Clamp the fixed carriage 5 and mounting plate 6, and tighten the screws 7.
It is fixed by

Reference numeral 8 is a tension spring, and this tension spring 8 is a spring hook provided on the movable carriage 2 that connects the portion 2a and the fixed carriage 5.
Both ends of the spring hooks provided in are locked between the portions 5a. The inserted magnetic disk 9 is held between the upper end 1 and the lower head 4 by this tension spring 8 with an appropriate load.

To explain the alignment adjustment method of the conventional floppy disk device as described above, with the screw 7 loosened, insert the jig 9a into the adjustment hole 2b provided in the movable carriage 2.
Insert the attached taper pin 9b at the tip of the magnetic disk, then bring both the upper and lower heads into close contact with the magnetic disk, and adjust the head position in the radial direction while reproducing a signal indicating the reference position written in advance on the disk.

It was freely moved in one rotation in the circumferential direction.

Problems to be Solved by the Invention However, as described above, it is difficult to adjust the movable carriage 2 while holding it completely horizontally with the jig 9a, and the leaf spring 3 sandwiched between the mounting plate 6 and the fixed carriage 5 is difficult to adjust. When the movable carriage 2 is moved, the screw T must be loosened sufficiently so that it does not bend or twist. When tightening the screw after adjustment, rotational force is applied to the leaf spring 3, and the head position before and after tightening the screw is adjusted. There was a problem that the same operation had to be repeated until the target range was reached.

The present invention has been made to eliminate the above-mentioned problems.It is an object of the present invention to reduce the number of adjustment man-hours by preventing the relative positions of the upper and lower heads from shifting before and after alignment adjustment with a simple structure without increasing the number of parts. The purpose is to

Means for Solving the Problems In order to solve the above problems, the present invention has a structure in which an adjustment hole is made in the leaf spring of a floppy disk device, and a hole is provided in the fixed carriage to serve as a fulcrum for an adjustment jig. It is.

5-7 Operation With the above configuration, the jig can be inserted into the fulcrum hole of the fixed carriage and the inside of the square hole of the leaf spring can be pushed horizontally with the side of the jig, so the upper and lower head positions can be adjusted without loosening the screws. This eliminates the need for readjustment due to misalignment of the upper and lower heads due to resupply of screws, which can be adjusted, and can significantly reduce the number of adjustment steps.

Example An embodiment of the present invention will be described with reference to FIGS. 1 to 3.

FIG. 1 is an exploded perspective view of the carriage, FIG. 2 is a perspective view of essential parts of the alignment adjustment mechanism, and FIG. 3 is a sectional view thereof. According to the figure, 1o is an upper head, 11 is a movable carriage on which the upper head 10 is mounted, this movable carriage 11 is fixed to one end of a leaf spring 12, and the other end of this leaf spring 12 is fixed. is held between a fixed carriage 14 on which the lower head 13 is mounted and a mounting plate 15, and is fixed with screws 16. 17 is a tension spring, this tension 6 ・＼
−.

Both ends of the spring 17 are locked to a spring hook portion 11a provided on the movable gear IJ body 11 and a spring hook portion 14a provided on the fixed carriage 14, respectively. The inserted magnetic disk 18 is pulled into the upper head 1 by this tension spring 17.
0 and the lower head 13 with an appropriate load. Note that the screw through hole 121L for inserting the screw 16 provided in the leaf spring 12 is provided slightly larger in diameter than the screw 16 so that the upper head 1o can move slightly, and is provided in the fixed carriage 14. A screw corresponding to the screw 16 is provided in the screw fixing hole 14b. Further, the fixed carriage 14 has a tip 19 of a square column-shaped jig 19 at the bottom.
A jig fulcrum hole 14 having a fulcrum round hole 14d into which a is inserted.
0 is provided near the screw fixing hole 14b, and an adjusting hole is provided in the leaf spring 12 that corresponds to the jig fulcrum hole 140 and is smaller than the jig fulcrum hole 140, and into which the jig 19 is inserted. A square hole 12b is provided in the mounting plate 15, which corresponds to the jig fulcrum hole 140 and corresponds to the jig fulcrum hole 14.
A hole 15b larger than 0 is provided with a screw hole 15a into which a screw 16 is inserted.

Next, to explain the alignment adjustment method, as shown in FIGS.
is inserted into the fulcrum round hole 14d, and then the jig 19 is tilted from an upright position forward and backward and left and right, and by pushing the inside of the leaf spring 12, the leaf spring is moved in one circumferential direction in the radial direction of the disk. The direction of rotation can also be freely adjusted by rotating the jig 19 about the fulcrum hole 14d in an upright state.

Effects of the Invention The present invention is configured as described above, and since the inside of the square hole of the leaf spring can be pushed horizontally with the side surface of the jig near the screw hole of the leaf spring, the direction of movement of the leaf spring can be adjusted. This has the effect that the loss of operating force associated with this is reduced, adjustment is possible even when the screw is tightened, and the number of adjustment steps can be significantly reduced.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a carriage in an embodiment of the floppy disk device of the present invention, FIG. 2 is a perspective view of essential parts of the alignment adjustment mechanism, FIG. 3 is a sectional view of the same, and FIG. FIG. 5 is a side sectional view of the carriage, and FIG. 6 is a perspective view showing the adjustment state of the upper head. 10... Upper head, 11... Movable carriage, 11a, 14a... Spring hook, 12...
...Plate spring, 12 &... Screw through hole, 12
b... Square hole for adjustment, 13... Lower head, 14... Fixed carriage, 140...
・Jig fulcrum hole, 14d...Fulcrum round hole, 15...
...Mounting plate, 16...screw, 17 old...
Tension spring, 18...Magnetic disk, 19...
...Jig, 19a...Jig tip. Name of agent: Patent attorney Toshio Nakao, 1st person, 2nd person
Figure 3 Figure 4

Claims (1)

[Claims] An upper head and a lower head are provided to face each other on the front and back sides of a flexible magnetic disk, a fixed carriage is provided with the lower head mounted on one end, and a plurality of heads are provided on the other end of the fixed carriage. a jig fulcrum hole provided near the screw hole and having a smaller fulcrum round hole at the bottom; a movable carriage having the above-mentioned upper head attached to one end; A leaf spring with one end fixed to the other end; a screw through hole corresponding to the screw hole of the fixed carriage and slightly larger than the other end of the leaf spring; an adjustment hole that is small and corresponds to the jig fulcrum hole, and that inserts a rod-shaped jig into the jig fulcrum hole and moves the leaf spring by pushing the inside of the jig fulcrum hole as a fulcrum; Overlapping the above plate spring, the above screw fixing hole,
The above screws pass through the mounting plate, which has a screw hole provided corresponding to the above screw through hole, and a hole portion that corresponds to the above jig fulcrum hole and adjustment hole and is larger than the above adjustment hole, and the above screw fixing hole. A floppy disk drive having a mechanism for adjusting the relative position of the upper and lower heads, which is comprised of a screw that screws the leaf spring to the fixed carriage through a hole and a screw hole.