JPH04241273A - Floppy disk device - Google Patents

Abstract

PURPOSE:To offer a small-sized FDD. CONSTITUTION:A carriage 5 provided with a head 6 attached to the lower surface of its tip is extended in a vertical direction to a moving direction A with respect to the head 6. The needle 10 of a linear pulse motor 9 is directly attached to the side surface of a pedestal 8 integrated with the carriage 5. The linear pulse motor 9 is disposed on the side of a floppy disk 4 so that the moving direction of the needle 10 may be the same as the moving direction of the head 6 and the side surface of the needle 10 may be parallel with the side surface of the floppy disk 4.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head drive mechanism in a floppy disk drive (hereinafter referred to as FDD).

0002

[Prior Art] Head drive in an FDD involves reciprocating the head in the radial direction of a floppy disk (recording medium) that rotates at high speed, positioning it at a predetermined position, and reading and writing information from the head to the floppy disk. It is something to do. This will be explained based on the diagram. FIG. 2 is a perspective view of a conventional FDD. In the figure, 2 is a square bag that protects a floppy disk 4, which will be described later, from dust and scratches, and has a rectangular window 3 cut out. The floppy disk 4 has a thin disk shape and is rotated at high speed by a drive means (not shown). Reference numeral 5 denotes a carriage, and a magnetic head 6 is attached to the lower surface of the tip.
Move back and forth along the The carriage 5 is connected at its rear end to a base 8 by a leaf spring 7, and the bag 2 of the floppy disk 4 is sandwiched between the base 8 and the base 8 with a slight gap therebetween. A projecting piece 1 is attached to the side surface of the rear end of the base 8.
5 is attached, and a pair of lead rods 16 are integrally attached to this projecting piece 15. Reference numeral 18 denotes a bracket attached to the stepping motor 19, and a lead screw 20 that rotates integrally with the rotating shaft of the stepping motor 19 is rotatably attached to the bracket 18. This lead screw 20 has a spiral groove 21 formed therein, and engages with the groove 21 of the box of lead rods 16 described above so as to sandwich it. As the stepping motor 19 rotates, the lead screw 20 rotates and the lead rod 16 moves along the groove, thereby causing the carriage 5 to reciprocate in the A direction.

The one shown in FIG. 3 is the second type of conventional FDD.
This is an example. In the figure, reference numeral 25 denotes a belt stand integrally formed on the side surface of the rear end of the base 8;
Both ends of the belt 26 are attached to the. 28 is a stepping motor, and a pulley 29 is attached to the rotating shaft of this stepping motor 28. Pulley 29
A belt 26 is wound around the belt 26, and the belt 26
It is set up on. As the stepping motor 28 rotates, the belt 26 is sequentially wound around the pulley 29, thereby causing the carriage 5 to reciprocate in the A direction.

0004

[Problems to be Solved by the Invention] However, in all of the above-mentioned conventional FDDs, the stepping motor for driving the carriage is disposed at the rear in the moving direction of the carriage. In addition, the size of the stepping motor increases the size of the entire device, making it particularly difficult to downsize the magnetic head in the moving direction. The present invention has been made in view of the above points, and its purpose is to provide a small FD.
The goal is to provide D.

[0005]

[Means for Solving the Problems] In order to achieve this object, an FDD according to the present invention includes a recording medium, a head for reading and writing information on the recording medium, and a head that is attached to the tip of the head for recording information. It consists of a moving member that reciprocates over the medium and a motor that drives this moving member. A linear pulse motor is attached to the movable element and arranged parallel to the side surface of the recording medium so that the moving direction of the movable element is the same as the moving direction of the head.

[0006]

[Operation] In the FDD according to the present invention, the movable member extends perpendicularly to the moving direction of the head, and its base is attached to the mover of the linear pulse motor, and the movable member itself has a moving range that is equal to or smaller than that of the floppy disk. The linear pulse motor is placed on the side of the floppy disk, and the thickness of the device is kept to a minimum.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained in detail below with reference to the drawings. FIG. 1 is a perspective view of an FDD according to the present invention. In the figure, the carriage 5 extends in a direction perpendicular to the moving direction A of the head 6. A movable element 10 of a linear pulse motor 9, which will be described later, is attached to the side surface of the base 8, and the base 8 moves integrally with the movable element 10. Linear pulse motor 9
consists of a movable element 10 and a stator 11, and is arranged near the side of the floppy disk 4. The movable element 10 reciprocates in the left-right direction in the figure with respect to the stator 11. and,
The direction in which the mover 10 moves back and forth is the moving direction A of the head 6.
The linear pulse motor 9 is arranged so as to be the same as that shown in FIG. Therefore, the movement range of the carriage 5 is limited to the area above the floppy disk 4, and the carriage 5 does not move off the floppy disk 4. Further, the linear pulse motor 9 is arranged so that the side surface of the movable element 10 of the linear pulse motor 9 and the side surface of the floppy disk 4 are parallel to each other. Therefore, when the head 6 moves over the floppy disk 4, the center of movement of the head 6 is kept constant.

[0008]

[Effects of the Invention] As explained above, the FD according to the present invention
According to D, a motor serving as a driving source is disposed on the side of the floppy disk, and a linear pulse motor is adopted as the motor, and the moving direction of the movable element of the linear pulse motor is the same as the moving direction of the head. Since the movable member extends perpendicularly to the direction of movement of the head and its base is attached to the mover, the movable member itself can only move within the floppy disk and will not come off the floppy disk. There is no need to provide a space for the moving member to move other than on the floppy disk. In addition, by using a linear pulse motor as the motor, the overall thickness of the device can be made thinner, and the motor can be placed to the side of the floppy disk, which makes the device more compact. achieved.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an FDD according to the present invention.

FIG. 2 is a perspective view of a first embodiment of a conventional FDD.

FIG. 3 is a perspective view of a second embodiment of a conventional FDD.

[Explanation of symbols]

4 Floppy disk 5 Carriage 6 Head 9 Linear pulse motor 10 Mover

Claims (1)

[Claims] Claim 1: A recording medium, a head for reading and writing information on the recording medium, a moving member to which the head is attached to the tip and reciprocating the head over the recording medium, and a motor for driving the moving member. The motor is a linear pulse motor, the moving member is extended in a direction perpendicular to the moving direction of the head, the base is attached to the mover of the linear pulse motor, and the moving direction of the mover is the same as the moving direction of the head. A floppy disk device characterized in that a linear pulse motor is disposed on the side of a recording medium in parallel with the side surface of the recording medium.