JPS6212370A - Head driving mechanism - Google Patents

Abstract

PURPOSE:To shorten the length of a head driving mechanism without altering the thickness by superposing a memory medium and the movable element of a linear pulse motor. CONSTITUTION:A linear pulse motor 10 has a movable element 11, a stator 12, a pair of guides 12a and a coil 12c are provided in the stator 12, and a pulsating current is supplied to the coil 12c to stepwisely reciprocate the element 11 along the guides 12a. The element 11 is horizontally disposed partly under a floppy disk 6 to move radially, a carriage 13 is secured to the upper surface of the element 11, and a head 5 is mounted on the upper end of the end of the carriage. A pad arm 14 is rotatably mounted in a horizontal axis 15 at the base end side of the carriage 13, and opposed to a head 5 through the disk 6. Thus, the motor 10 and the disk 6 are superposed to shorten the length of the element 1 in the moving direction.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a head drive mechanism for a magnetic disk device or the like, and particularly to a head drive mechanism that reduces the length of the device in the direction of head movement.

[Background Art] In recent years, OA (office automation) has significantly developed, and floppy disk devices and the like are widely used as storage devices for OA equipment.

FIGS. 3 and 4 are perspective views showing the configuration of a head drive mechanism of this type of floppy disk device.

First, Fig. 3 shows what is called the alpha-winding steel belt head positioning system, in which a steel belt 2 wound around a pulley la that is rotationally driven by a pulse motor 1 converts rotational motion into linear motion, and the carriage 3. A head 5 is fixed to the carriage 3 via a head support member 4, and the head 5 reciprocates over a floppy disk 6 in its radial direction.

On the other hand, Fig. 4 shows what is called a lead screw head positioning system, in which the carriage 3 is reciprocated by a needle 8 engaged with the thread groove of a feed screw 7 that is rotationally driven by a pulse motor l, and the head 5 is It is what drives the. In addition, in these figures, 9 is a guide bar.

[Problems to be solved by the invention] By the way, in the above-mentioned conventional head drive mechanism,
In order to make the device thinner, the carriage 3 and the floppy disk 6 are positioned on almost the same plane. Therefore, the carriage 3 is located outside the floppy disk 6, and there is a problem in that the length of the apparatus in the moving direction of the carriage 5 becomes long. That is, it has not been possible to simultaneously reduce the thickness of the device and shorten its length.

The present invention was made against this background, and an object of the present invention is to provide a head drive mechanism that simultaneously achieves a thinner device and a shorter length.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a disc-shaped storage medium that is rotationally driven, a head that writes to and reads from the storage medium, and a head that reads and writes data to and from the storage medium. In a storage device comprising a linear pulse motor having a mover that drives in a radial direction of a medium, the mover is disposed at a position at least partially facing one of the surfaces of the storage medium. It is characterized by:

[Function] According to the above configuration, since the mover is located above or below the storage medium, the length of the apparatus in the direction of carriage movement can be shortened.

Furthermore, since thin linear pulse motors exist, it is possible to achieve a thinner device.

Note that a floppy disk is a typical example of the storage medium.

[Example code] Hereinafter, the present invention will be described in detail with reference to the drawings.

FIGS. 1 and 2 are diagrams showing the configuration of an embodiment of the present invention, with FIG. 1 being a plan view and FIG. 2 being a side view. In these figures, IO is a linear pulse motor, and mover 1
1 and a stator 12. The stator I2 includes a pair of guides 12a, 12a, and a pair of coils 12c, 12.
c is provided, and by supplying a pulsed current to the coils 12c, 12c, the mover 11 moves to the guide 12a.
, 12a in a stepwise manner.

Note that this type of linear pulse motor is already known.

The mover 11 is horizontally arranged so that a part thereof is located below the floppy disk 6 and moves in the radial direction of the floppy disk 6. In this state, the stator 12 is fixed to the floppy disk device. There is. Further, a carriage 13 is fixed to the upper surface of the mover 11, and a head 5 attached to the upper surface of the tip end of the carriage 13 reciprocates on the lower surface of the floppy disk 6 in its radial direction. A pad arm 14 is attached to the base end side of the carriage I3 so as to be rotatable about a horizontal shaft 15. A pad 14a is fixed to the lower surface of the tip of the pad arm 14, and a floppy disk 6 is attached to the pad 14a.
The head 5 faces the head 5 with the head 5 sandwiching the head 5 from above and below. Also,
A spring 16 is attached near the base end side of the pad arm 14, and urges the pad arm 14 downward.

In this way, the pad 14a connects the floppy disk 6 to the floppy disk 6.
TF? 1.7? 6a is a head window, 17 is a spindle motor, and 18 is a chuck.

According to such a configuration, the linear pulse motor 10 and the floppy disk 6 are superimposed, so that the length of the device in the moving direction of the mover 11 can be shortened. Furthermore, since the linear pulse motor 10 is extremely thin, the thickness of the device can also be made thin. Note that the pad arm I4 normally opens upward, and is closed as shown in FIG. 2 when the operator inserts the floppy disk 6.

Although the above embodiment has been described using a single-sided head as an example, a similar configuration can be made when a double-sided head is used.

Further, the head may be brought into contact with the top surface of the floppy disk instead of the bottom surface.

Furthermore, according to this embodiment, since the distance between the base end of the carriage 13 and the head 5 is short, the positional deviation of the head 5 due to errors in mounting the carriage 13 can be reduced.

[Effects of the Invention] As explained above, in the present invention, the storage medium such as a floppy disk and the mover of the linear pulse motor are arranged in an overlapping manner, so that the head can be moved without changing the thickness of the device. The length of the device in the direction of movement can be shortened.

[Brief explanation of the drawing]

FIGS. 1 and 2 are diagrams showing the configuration of an embodiment of the present invention, with FIG. 1 being a plan view and FIG. 2 being a side view. Also, the third
4 are perspective views showing the configuration of a head drive mechanism of a conventional floppy disk device. 5... Head, 6... Floppy disk (storage medium), 10... Linear pulse motor, 11... Mover, 12... ·stator.

Claims (1)

[Claims] A storage device comprising a disk-shaped storage medium that is rotationally driven, a head that writes to and reads from the storage medium, and a linear pulse motor that has a mover that drives the head in a radial direction of the storage medium. A head drive mechanism, wherein at least a portion of the mover is disposed at a position facing one of the surfaces of the storage medium.