JPS61153869A - Carriage device for magnetic head - Google Patents

Abstract

PURPOSE:To improve the follow-up performance of a magnetic head and to minimize oscillation and shock by providing a movable pivot which supports surfaces of the 1st and the 2nd magnetic heads at the opposite sides of a floppy disk surface elastically and a movable pivot stopper. CONSTITUTION:Gimbals 20a and 20b are fitted to head arms 11a and 11b. The magnetic heads 13a and 13b are fitted to the gimbals 20a and 20b and supported while pressed against the floppy disk 22 by movable pivots 21a and 21b made of a leaf spring through the gimbals 20a and 20b. One-terminal sides of the pivots 21a and 21b are fixed to the arms 11a and 11b and the movement of pivots 21a and 21b toward the disk 22 is limited by pivot stoppers 25a and 25b fitted to the arms 11a and 11b. The arm 11a is connected to a carriage body 24 through a leaf spring 23 and the arm 11b is connected to the main body 24. Thus, the follow-up performance of the magnetic head is improved and oscillation and shock are minimized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention J] The present invention relates to a carriage device for a magnetic head used in a floppy disk device.

[Technical Background of the Invention and Problems thereof] Conventionally, a magnetic head of a floppy disk device is attached to a carriage 10 as shown in FIG. The carriage 10 includes a gimbal arm 11 and a gimbal 12 attached to the tip of the gimbal arm 11, and the gimbal 12 holds a magnetic head 13.

Here, in the double-sided type floppy disk device, as shown in FIG. 9 (cross-sectional view), upper and lower gimbal arms 11a and 11b are attached to the carriage 10. The gimbals 12a and 12b of the gimbal arms 11a and 11b respectively hold vertically opposed magnetic heads 13a and 13b. In this case, the magnetic head 13a is supported via the gimbal 12a by a pivot 14 attached to the gimbal arm 11a. Therefore, when the magnetic head 13a comes into contact with a floppy disk (not shown), it moves elastically. Further, the magnetic head 13tl is connected to the gimbal 1.
Pivot 14 due to gimbal 12b having higher rigidity than 2a.
Supported without the use of .

Incidentally, a load determined by the loads of the spring 15 and the carriage 10 is applied to the magnetic heads 13a and 13b. At this time, the conventional carriage 10
Since the pivot 14 has relatively high rigidity, the magnetic heads 13a and 13b can withstand the ups and downs of the floppy disk.
tracking may be insufficient. Therefore, when reading data from a floppy disk, a situation occurs in which the read output of the magnetic heads 13a and 13b becomes unstable, as shown in FIG.

In addition, since the load of the slider 10 is affected, installing the floppy disk device vertically or horizontally will
This results in a difference in the loads applied to the magnetic heads 13a and 13b. Also, a magnetic head 13a.

Another problem is that it is relatively weak against vibration and shock.

[Object of the Invention] An object of the present invention is to improve the ability of a magnetic head to follow the ups and downs of a floppy disk, to minimize vibrations and shocks to the magnetic head, and to realize reliable operation of the magnetic bed. An object of the present invention is to provide a carriage device for a magnetic head that can perform the following steps. ``□ ゛ [Summary of the Invention 11 The present invention provides a floppy disk drive having a magnetic head having one end connected to a head arm and the other end elastically supporting the central portion of a magnetic head on the side opposite to the side facing the floppy disk surface. A movable pivot is provided. This movable and pot is made possible by a movable pivot stopper connected to a part of the head arm? The movement range in the vertical direction is limited.

With this configuration, the magnetic head can elastically follow the undulations of the floppy disk.

Further, the negative effects on the magnetic head due to vibrations, shocks, etc. can be minimized.

[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure is a cross-sectional view showing the configuration of a carriage device according to one embodiment. In FIG. 1, gimbals 20a, 20
b is made of a material with low rigidity and is attached to the rear arms 11a and 11b, respectively. magnetic head 1
3a and 13b are attached to the respective gimbals 20a and 20b, facing each other vertically.

Each magnetic head 13a, 13b is gimbaled by a movable pivot 21a, 21b made of a plate spring, respectively.

It is supported so as to be pressed toward the floppy disk 22 via 20b. Movable pivots 21a, 21
As shown in FIG. 1, each arm of b is fixed to the head arm 11a, llb. moreover,
The movable pivots 21a, 21b are the head arm 1
1a, pivot stopper 25 attached to Ilb
a.

25b restricts movement toward the floppy disk 22 side.

On the other hand, the head arm lla is connected to the carriage body 24 via a leaf spring 23, and the head arm lla is connected to the carriage body 24 via a leaf spring 23.
Movement toward the floppy disk 22 is restricted by a stopper portion 26 integrated with the floppy disk 22 .

The head arm 11b is connected to the carriage body 24.

In the carriage device having such a configuration, the effects of the same embodiment will be explained. First, as shown in FIG. 2, when unloading the magnetic disk 22, the magnetic head 13a
, 13b are in a state of being pushed out by movable pivots 218, 21b, respectively. At this time, movable pivot 2
1a and 21b are g pivot stoppers 25a,
25b, it is held in a fixed position.

Next, when the floppy disk 22 is loaded into the floppy disk device main body, the magnetic heads 13a and 13b approach each other so as to sandwich the floppy disk 22 above and below, as shown in FIG. At this time, the upper head arm 11a, as shown in FIG.
The stopper portion 26 of the carriage body 24 is held by the leaf spring 23.
It is pressed and fixed in a fixed position. Therefore, the load of the head arm 11a on the magnetic head 13a is limited to a certain level or less, and the load on the magnetic head 13a is limited to below a certain level.
The load applied to 3a will be greatly reduced.

Therefore, even if the floppy disk device is placed vertically or horizontally, the load of the head arm 11a on the magnetic head 13a is limited, so the magnetic head
3a will receive a constant load. Further, even if the floppy disk drive main body is subjected to photographing or impact, the load of the head arm 11a has little effect on the magnetic head 13a, so that changes in the load on the magnetic head +38 are kept to a minimum.

Furthermore, as shown in FIG. 3, each magnetic head 13a,
13b is a movable pivot 218°21 that operates elastically.
b, each magnetic head 13a,
13b can follow the undulating floppy disk 22 and perform read/write operations reliably. Therefore, a stable read output as shown in FIG. 4 can be obtained from each magnetic head 13a, 13b.

FIGS. 5(a) and 5(b) are diagrams showing an example of a specific structure of the gimbals 20a, 20b and movable pivots 21a, 21b in the carriage device shown in FIG. 1. That is, in the same figure (a> gimbal with dowel 20a
, 20b and movable pivots 21a, 21b, and the figure (b) shows the movable pivot 21a with a dowel.
, 21b and gimbals 20a, 20b.

Furthermore, FIGS. 6 and 7 respectively show other embodiments of the present invention, in which the movable pivot (21a or 21b) is connected to the upper helad arm 11a or the lower head arm 11.
This is the case where it is installed on one side of b. In this case, the gimbal (20a or 20b) of the head arm on which the movable pivot is not installed is made of a highly rigid material. In either case, the operation and effect are the same as those of the embodiment shown in FIG. 1, so the same reference numerals will be used and the explanation will be omitted.

[Effects of the Invention] As described in detail above, according to the present invention, since the magnetic head is supported by a movable pivot, it is possible to improve the followability of the magnetic head with respect to the floppy disk. Therefore, read/write operations of the magnetic head can be stabilized.

In addition, when loading the magnetic head, the load of the head arm on the magnetic head can be limited to a certain limit.
It becomes possible to limit the load on the magnetic head.

Therefore, even if there is a change in the installation direction of the floppy disk device, vibration, or impact, changes in the load on the magnetic head can be kept to a minimum. Furthermore, as a result, the load of the head arm applied to the floppy disk via the magnetic head is limited, so that damage to the surface of the floppy disk can be significantly reduced.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the configuration of a carriage device according to an embodiment of the present invention, FIGS. 2 and 3 are sectional views for explaining the operation of the embodiment, and FIG. 4 is a sectional view of the embodiment. Output waveform diagrams of the magnetic head to explain the operation, Fig. 5(a), (
b) is a diagram showing a partial configuration of the same embodiment, FIGS. 6 and 7 are sectional views each showing another embodiment of the present invention, and FIGS. 8 to 10 illustrate a conventional carriage device. Figure 8 is a perspective view, Figure 9 is a sectional view, and Figure 1 is a perspective view.
Figure 0 is an output waveform diagram of the magnetic head. 11a, 11b--head arm, 13a,
13b-@ki head, 20a, 20b-... gimbal, 21a, 21b-, movable pivot, 22...
・Floppy disk, 23...plate spring, 24...
Carriage body, 25a, 25b... bipot stopper, 26... stopper part. Applicant's agent Patent attorney Takehiko Suzue Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 (a) (b) Figure 6

Claims (2)

[Claims] (1) A floppy disk device includes a carriage body, a first magnetic head attached to the tip of the carriage body via a gimbal, and a first magnetic head attached to the carriage body so that the tip moves toward the carriage body. a head arm that is energized; a second magnetic head that is attached to the tip of the head arm via a gimbal so as to face the first magnetic head; and a head arm that limits the range of movement of the head arm. a stopper; a movable pivot having at least one end elastically supporting a surface of the first or second magnetic head opposite to the surface that contacts the floppy disk surface; and a movable pivot that limits the movement range of the movable pivot. A carriage device for a magnetic head, comprising a stopper. (2) a first magnetic head whose one end elastically supports the surface of the first magnetic head opposite to the surface that contacts the floppy disk;
a second movable pivot whose one end elastically supports a surface of the second magnetic head opposite to the surface that contacts the floppy disk; and a second movable pivot that limits the movement range of the first movable pivot. A carriage device for a magnetic head according to claim 1, further comprising: a first movable pivot stopper that limits the movement range of the second movable pivot; and a second movable pivot stopper that limits the movement range of the second movable pivot. .