JPS6288183A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To prevent a thermal off-track phenomenon caused by the heating of a coil, and to eliminate a malfunction at the time of recording and reproduction, by providing a heat insulating member between a magnetic head and a carriage. CONSTITUTION:When a magnetic disk 2 is rotating together with a spindle 1, a carriage 7 executes a seek operation, based on a command, and information is recorded or reproduced by a magnetic head 5. Accordingly, sometimes the temperature of the carriage 7 is greatly different due to the difference of heating values of the coil 10 at the times of recording and reproduction. Therefore, between the heat 5 and the carriage 7, a head arm holder 6 is provided, and the heat insulating member 11 is provided so that heating of the coil 10 is not brought to heat transmission to the head 5. Accordingly, no difference is generated in the thermal expansion quantity of the head arm of each magnetic head 5, a thermal off-track caused by the heating of the coil is not generated, and when information is recorded and reproduced, the malfunction is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic disk device, and more particularly to a magnetic disk device in which the structure of mounting a group of magnetic heads for recording and reproducing information on a carriage is improved.

[Conventional technology]

Conventionally, in this type of magnetic disk drive, the magnetic head group was attached to the carriage by pushing the end face of the head arm of the magnetic head and the end face of the carriage directly onto the head arm block through the head arm block. It had a structure that kept it in place.

[Problem that the invention seeks to solve]

In the above-mentioned conventional magnetic disk device, the heating power of the coil fixedly attached to the carriage is transmitted to the magnetic head group via the head arm holder, and is conducted to the magnetic head arm of each magnetic head group. Because the amount of heat transfer is different,
Since the amount of thermal expansion of each head arm is different, a so-called thermal off-track phenomenon occurs, resulting in malfunctions in writing and reading information.

[Failure to solve the problem]

The magnetic disk device of the present invention includes a magnetic disk group, a spindle rotation mechanism for supporting and rotating the magnetic disk group, a magnetic head group for recording and reproducing information on the magnetic disk group, and holding and fixing the magnetic head group. The magnetic disk drive includes a head arm holder that holds and positions the head arm holder, and a heat insulating member is provided between the magnetic head group and the carriage.

〔Example〕

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a partially cutaway front view of a magnetic disk drive according to an embodiment of the present invention, FIG. 2 is a front cross-sectional view showing details of the vicinity of the carrier and jig in FIG. 1, and FIG. FIG.

Referring to FIG. 1, a spindle 1 has a plurality of magnetic disks 2 mounted thereon in a substantially parallel manner, and is rotatably attached to a housing base 3 and a housing base 4 via bearings (not shown). It is driven by a dedicated motor (not shown).

A magnetic head 5 (read/write head) writes and reads data signals to and from the magnetic disk 2, and a servo head 5a records positioning signals (servo signals) and outputs servo signals from the servo disk 2a.
The carrier and the shifter, which are mounted on the door arm holder 6 and having the heat insulating member 11, reciprocate linearly toward the center of the magnetic disk 2 on a linear guide (not shown). In order to drive the reciprocating motion of the carriage 7, a magnetic circuit 8 constituted by a permanent magnet is attached to the housing base 4 and the housing base 3 via a frame 9, and cooperates with a coil 1o provided on the carriage 7. The carriage 7 moves back and forth.

These magnetic disk 2, carriage 7, magnetic spatula)
5 is covered with a housing base 4, a housing base 3, a frame 9, a magnetic circuit 8, and a cover (not shown), and is housed in a sealed case.

Referring to FIG. 2, the head arm holder 6 that fixes the magnetic head 5 is provided with a heat insulating member 11, which has a structure that makes it difficult for the heat generated by the coil 10 fixed to the carriage 7 to be transmitted to the magnetic head 5. It becomes.

The magnetic disk device configured as described above operates as follows. When the magnetic disk 2 is being driven by the motor and rotating together with the spindle 1, upon receiving a positioning command from the upper if, the carriage 7 executes the positioning control cycle llI? (not shown) performs a seek operation,
At the commanded predetermined position, the magnetic head 5 records or reproduces information. Therefore, due to the difference in the amount of heat generated by the coil 10 when recording and reproducing information, the temperature of the υ thousand carriages may vary greatly.

In this embodiment, a head arm holder 6 is provided between the magnetic head 5 and the carriage 7, and the head arm holder 6 is provided with a heat insulating member 11, so that the coil 10 fixed to the carriage 7 is Heat insulating member 1
Even if the temperature of the carriage 7 differs greatly between recording and reproducing information, the heat is not transferred to the magnetic head 5 due to the action of the coil 10. There is no difference in the amount of thermal expansion, and there is no thermal off-trace phenomenon caused by heat generation in the coil.
This has the effect of reducing malfunctions during information recording and reproduction.

It goes without saying that even if the heat insulating member 11 is provided on the end face of the carriage 7, on the magnetic side, on the door 5, or on the end face of the door arm, the same effect as this embodiment can be obtained. According to the present invention, by providing a heat insulating member between the magnetic head and the carriage, information can be recorded without being affected by the heat generated by the coil, and with no thermal off-tock caused by the heat generated by the coil.・It has the effect of reducing malfunctions during playback.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view showing one embodiment of the present invention, and FIG.
3 are a front sectional view and a side view showing in detail the vicinity of the carriage used in this embodiment of FIG. 1. 1...Spindle, 2...Magnetic disk, 5...Magnetic head, 6...To, door arm holder, 7...Thousand ridges, 11...
...Insulated department system. Book 1 Series 2 Figure 3

Claims (1)

[Claims] A magnetic disk group, a spindle rotation mechanism for supporting and rotating the magnetic disk group, a magnetic head group for recording and reproducing information on the magnetic disk group, a head arm holder for holding and fixing the magnetic head group, and the head. 1. A magnetic disk device comprising a carriage that holds and positions an arm holder, characterized in that a heat insulating member is provided between the magnetic head group and the carriage.