JPH0729285A - Head carriage device - Google Patents

Abstract

PURPOSE:To reduce the loss height when a holder is lifted up and to reduce the thickness of a floppy disk device by bisecting planar springs for holding the holder to a front part on a holder side and a rear part on a carriage side and disposing a rigid body part between the front and rear parts. CONSTITUTION:The rigid body part 2 is disposed between the planar springs 1a and 1b bisected and fixed to the front part of the holder 3 carrying magnetic heads 4b and 4a and the mounting part 5a of the carriage 5. The holder 3 is vertically displaced by vertically moving an arm 15 on its flank by means of a loading and unloading mechanism part 12, thereby deforming the springs 1a, 1b in order to facilitate the attachment and detachment of a flexible magnetic disk 6. The front end of the holder 3 tends to be vertically moved by the deformation of the spring 1b at this time but is pressed by a top cover 8, by which the loss height is decreased. As a result, the formation of the floppy disk device to a smaller thickness is possible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head carriage device used in a floppy disk device.

[0002]

2. Description of the Related Art A head carriage device used in a floppy disk device having a flexible magnetic disk as a recording medium has a head carriage device for carrying and moving a magnetic head. The head carriage device is a flexible magnetic disk. The magnetic head is moved in the radial direction and information is recorded or reproduced while sliding on the rotating flexible magnetic disk at a designated position on the flexible magnetic disk.

FIG. 5 is a front view showing an unloaded state of an example of such a conventional head carriage device, and FIG. 6 is a plan view of the main part of the example of FIG.

In FIG. 5, the magnetic head 4a is mounted on a plate 14 fixed on the carriage 5. The magnetic head 4b provided to face the magnetic head 4a is carried by the tip of the holder 3, and the end of the holder 3 is held by one end of the leaf spring 13. The other end of the leaf spring 13 is fixed to the mounting portion 5a protruding from the carriage 5 with a screw 9.

A load spring that applies a predetermined pressure to the mounting portion 5a of the carriage 5 to bring the magnetic heads 4a and 4b into contact with the flexible magnetic disk 6 and to stably record or reproduce information on or from the flexible magnetic disk 6. 11 is provided.

In the head carriage device thus constructed, when the flexible magnetic disk 6 is attached to or detached from the floppy disk device, the arm 15 provided on the side surface of the holder 3 is moved up and down by the load / unload mechanism section 12. The plate-shaped spring 13 is deformed by the holder 3
Of the flexible magnetic disk 6 by displacing the
It is designed to be easily attached and detached.

[0007]

As described above, in the conventional head carriage device, the holder 3 is displaced in the vertical direction by the load / unload mechanism 12 when the flexible magnetic disk 6 is attached or detached. At this time, as the holder 3 tilts, the magnetic head 4b also tilts at the angle θ2. It is necessary to lift the holder 3 to a position where the point A at the rear end of the contact surface of the tilted magnetic head 4b does not come into contact with the flexible magnetic disk 6. For this reason,
A loss corresponding to the height difference ΔH2 between the point B at the front end and the point A at the rear end of the contact surface of the magnetic head 4b occurs.

The conventional head carriage device has a drawback that it is difficult to make the floppy disk device thin because the height difference ΔH2 increases.

[0009]

SUMMARY OF THE INVENTION A head carriage device of the present invention comprises a holder carrying a first magnetic head at its tip, a leaf spring having one end held at the end of the holder, and a tip at the tip. A head carriage device comprising: a carriage that carries a second magnetic head facing the first magnetic head and holds the other end of the plate-shaped spring at a rear end thereof. A rigid body portion is provided between the front portion and the rear portion and further divided into at least one of the front portion and the rear portion of the leaf spring. One is divided into left and right with respect to the center line.

[0010]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is a front view showing an unloaded state of a first embodiment of the present invention, FIG. 2 is a plan view of a main portion of the embodiment of FIG. 1, and FIG. 3 is an operation of a holder of the embodiment of FIG. It is a front view which shows a state.

As shown in FIGS. 1 and 2, the structure of this embodiment is the same as that of the conventional example shown in FIG. 5 except for the plate spring.

The leaf spring is a leaf spring 1a in the front portion fixed to the holder 3 and a mounting portion 5a of the carriage 5.
It is divided into two parts, a plate-shaped spring 1b in the rear part and a plate-shaped spring 1b in the front part, and a rigid part 2 provided between the plate-shaped spring 1a in the front part and the plate-shaped spring 1b in the rear part. Leaf spring 1
Each of a and 1b is made of stainless steel, and the rigid body portion 2 is made of a plastic such as ABS resin or polycarbonate.

In the head carriage device constructed as described above, when the flexible magnetic disk 6 is attached or detached, the arm 15 provided on the side surface of the holder 3 is moved up and down by the load / unload mechanism section 12 to cause the leaf spring to move. By deforming 1a and 1b and displacing the holder 3 in the vertical direction, the flexible magnetic disk 6 can be easily attached and detached. At this time, as shown in FIG. Due to the deformation of the spring 1b, the position of the dotted line in the figure (tilt angle θ2, loss height ΔH
Attempt to move to 2). However, since the top surface of the tip of the holder 3 is pressed by the top cover 8 in the direction of arrow C, the position of the solid line in the figure (inclination angle θ1, loss height ΔH1) is mainly due to the deformation of the plate spring 1a.

Since θ1 <θ2 and ΔH1 <ΔH2,
It is possible to reduce the height of loss, and thus make the floppy disk device thin.

The leaf springs 1a and 1b may have the same or different thicknesses, and either one may be thicker.

FIG. 4 is a plan view of the main part of the second embodiment of the present invention.

In the embodiment shown in FIG. 4, in order to increase flexibility, the plate springs 16a and 16b are divided into right and left with respect to the center line so as to have a narrow width. The operation and effect of this embodiment are the same as those of the embodiment of FIG.

[0019]

As described above, in the head carriage device of the present invention, the plate-shaped spring holding the holder is divided into a front portion on the holder side and a rear portion on the carriage side, and a front portion and a rear portion are provided. By providing the rigid body portion between the two, it is possible to reduce the height of loss when the holder is lifted, and thus it is possible to make the floppy disk device thin.

[Brief description of drawings]

FIG. 1 is a front view showing an unloading state of a first embodiment of the present invention.

FIG. 2 is a plan view of a main part of the embodiment shown in FIG.

FIG. 3 is a front view showing an operating state of the holder of the embodiment of FIG.

FIG. 4 is a plan view of a main part of a second embodiment of the present invention.

FIG. 5 is a front view showing an example of an unloaded state of a conventional head carriage device.

FIG. 6 is a plan view of a main part of the example of FIG.

[Explanation of symbols]

 1a ・ 1b ・ 13 ・ 16a ・ 16b Plate spring 2 Rigid body part 3 Holder 4a ・ 4b Magnetic head 5 Carriage 5a Attachment part 6 Flexible magnetic disk 8 Top cover 9 Screw 11 Load spring 12 Load / unload mechanism part 14 Plate 15 Arm

Claims (2)

[Claims] 1. A holder carrying a first magnetic head at its tip, a plate-like spring having one end held at the end of the holder, and a second spring facing the first magnetic head at its tip. In a head carriage device comprising a carriage for carrying a magnetic head and holding the other end of the plate-shaped spring at the rear end, the plate-shaped spring is divided into a front part on the holder side and a rear part on the carriage side. The head carriage device is characterized in that a rigid portion is provided between the front portion and the rear portion. 2. The head carriage device according to claim 1, wherein at least one of a front portion and a rear portion of the plate-shaped spring is divided into right and left with respect to a center line.