JPH02240859A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To always execute stable recording and reproducing with the aid of the excellent contact of a magnetic head and a medium by changing the pressurizing force of the magnetic head according to the track position of the medium. CONSTITUTION:When the medium 5 is rotated by a motor and the recording and reproducing of a signal is executed by an optional track provided in a concentric circular state on the top and the bottom surfaces of the medium 5, a carriage fixing part 3a is moved in right and left directions and in parallel with the medium 5. Since a projecting part 3c abuts on a guide slope member 8 and it is moved by being guided, a carriage movable part 3b is moved in an up-and-down direction according to the inclining degree of the member 8. As the result, the pressurizing force of the magnetic heads 1 and 2 to the medium 5 is changed to an optimum value so as to always obtain the excellent contact according to the track position of the medium 5. Thus, the stable recording and reproducing is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic disk device that can stably record and reproduce signals on a flexible medium.

[Prior Art] FIG. 2 is a side view showing the peripheral portion of a magnetic head in a conventional magnetic disk device. In the figure, l is a magnetic head on one side, 2 is a magnetic head on the other side,
3a is a carriage fixing part that supports the magnetic head 1 on one side via a spring; 4 is an arm that supports the magnetic head 2 on the other side via a spring; one end of this arm 4; is the carriage fixing part 3a
It is joined and fixed to one end of the. 5 is a disc-shaped medium, 6
Reference numeral 7 indicates a spindle of a motor (not shown) that rotates the medium 5, and 7 indicates a frame of the magnetic disk device to which the motor, carriage fixing portion 3a, etc. are attached.

Next, the operation of the above conventional magnetic disk device will be explained. In a magnetic disk drive configured as described above, when the medium 5 is rotated by a motor and signals are recorded or reproduced using arbitrary tracks arranged concentrically on the upper and lower surfaces of the medium 5, the carriage is fixed. The section 3a is moved to the left and right in FIG. 2 and parallel to the medium 5. At this time, since the carriage fixing part 3a and the arm 4 are bonded and fixed to each other at one end, the positional relationship between the magnetic head l on one side and the magnetic head 2 on the other side is maintained constant.

[Problems to be Solved by the Invention] Since the conventional magnetic disk device described above is configured as described above, the flexibility of the medium 5 is usually different between the inner circumferential portion and the outer circumferential portion. Since the pressing force of the magnetic head on the medium 5 is always constant, good contact between the medium 5 and the magnetic head is required so that signals can be stably recorded and reproduced on all tracks on the medium 5. The problem was that it was very difficult to maintain the

This invention was made to solve the above-mentioned problems, and it maintains good contact between the medium and the magnetic head at all track positions on the medium, thereby stably recording and recording signals. The object of the present invention is to obtain a magnetic disk device that can perform playback.

[Means for Solving the Problems] A magnetic disk device according to the present invention includes a carriage movable section to which a magnetic head is attached, and a guide slope member that comes into contact with and guides the carriage movable section. By moving the carriage movable section to the left or right, the carriage movable section moves upward or downward according to the inclination of the guide slope member, and depending on the track position of the medium, the pressing force of the magnetic head against the medium is increased. It is designed to change the

[Function] In the magnetic disk device of the present invention, when the carriage movable portion to which the magnetic head is attached moves to the left or right, the carriage movable portion comes into contact with the guide slope member and moves while being guided. The carriage movable section moves upward or downward according to the inclination of the guide slope member, and as a result, depending on the track position of the medium, the pressing force of the magnetic head against the medium is adjusted such that good contact is always obtained. Change to the optimal value.

[Embodiment] FIG. 1 is a side view showing the peripheral part of a magnetic head in a magnetic disk device according to an embodiment of the present invention. In FIG. The head 3a is a carriage fixed part that supports the magnetic head l on one side, and 3b is a carriage movable part to which the magnetic head 1 on the other side is attached via a spring, and this carriage movable part 3b has a structure that allows it to freely move upward and downward with respect to the carriage fixing part 3a. An arm 4 supports the magnetic head 2 on the other side via a spring, and one end of this arm 4 is fixedly joined to one end of the carriage fixing part 3a. 5 is a disc-shaped medium; 6 is a spindle of a motor (not shown) that rotates the medium 5;
Reference numeral 7 denotes a frame of the magnetic disk device to which the motor, carriage fixing part 3a, etc. are attached, and 8 makes contact with the protrusion 3c of the carriage movable part 3b, and the carriage movable part 3
1), and this guide slope member 8 is provided on the frame 7.

Next, the operation of the magnetic disk device according to the embodiment of the present invention will be explained. In the magnetic disk drive configured as described above, the medium 5 is rotated by a motor, and signals are recorded using arbitrary tracks arranged concentrically on the upper and lower surfaces of the medium 5.

When performing reproduction, the carriage fixing section 3a is moved to the left and right in FIG. 1 and parallel to the medium 5. At this time, the carriage movable section 3b has its protrusion 3C in contact with the guide slope member 8 and is guided to move.
The carriage movable section 3b moves upward or downward according to the inclination of the guide slope member 8, and as a result, depending on the track position of the medium 5, the pressing force of the magnetic head against the medium 5 always provides good contact. The value changes to the optimum value.

[Effects of the Invention] As described above, according to the magnetic disk device of the present invention,
A carriage movable section to which a magnetic head is attached and a guide slope member that abuts and guides the carriage movable section are provided, and as the carriage movable section moves to the left or right, the carriage movable section moves. The guide slope member moves upward or downward according to the inclination of the guide slope member,
Since the configuration is configured so that the pressing force of the magnetic head against the medium is changed depending on the track position of the medium, the medium and the magnetic head maintain good contact at all track positions on the medium, and stable signal transmission is achieved. This has the excellent effect of providing a magnetic disk device that can perform recording and reproduction.

[Brief explanation of drawings]

FIG. 1 is a side view showing a peripheral portion of a magnetic head in a magnetic disk device according to an embodiment of the present invention, and FIG. 2 is a side view showing a peripheral portion of a magnetic head in a conventional magnetic disk device. In the figure, 1... a magnetic head on one side; 2... a magnetic head on one side;
... Magnetic head on the other side, 3a... Carriage fixed part, 3b... Carriage movable part, 3C... Protrusion, 4... Arm, 5... Medium, 6... Motor Spindle, 7... Frame, 8... Guide slope member. In addition, the same symbols in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] A magnetic disk device for recording and reproducing signals on and from a disk-shaped flexible medium, characterized in that it is equipped with a pressure variable means that changes the pressing force of a magnetic head against the medium depending on the track position of the medium. disk device.