Radiation apparatus of hard disk drive

Details Radiation apparatus of hard disk drive Radiation apparatus of hard disk drive

1999-08-30

2001-06-19

Tupper, Robert S. (Department: 2652)

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

Reexamination Certificate

active

06249400

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a radiation apparatus of a hard disk drive which dissipates heat generated from the inside of a housing to the outside.
2. Description of the Related Art
In a general hard disk drive used as a memory storage device of a computer, as shown in
FIG. 1
, a hard disk
15
rotated by a spindle motor is installed in a housing
10
which is formed of a stainless steel-based material or aluminum-based material. The hard disk
15
rotates together with a rotor
13
b
of the spindle motor
13
.
The housing
10
is installed inside a computer main body (not shown) and has a base frame
11
by which the spindle motor
13
is supported and a cover frame
12
coupled to the base frame
11
to protect the hard disk
15
.
Here, a rotation shaft
13
a
of the spindle motor
13
fixed to the base frame
11
is directly coupled to the cover frame
12
by a screw
17
to prohibit shaking of the hard disk
15
due to centrifugal force.
A damper member
14
formed of aluminum is attached on the outer surface of the cover frame
12
using a double-sided adhesive tape
16
to dampen vibrations generated from the inside of the housing
10
.
In the hard disk drive having the above structure, heat is generated due to driving of the spindle motor
13
for rotating the hard disk
15
and due to friction between the hard disk
15
and air. Thus, the temperature in the housing
10
increases in proportion to the number of rotations of the hard disk
15
. However, since data recorded on the hard disk
15
may be damaged when the temperature in the housing
10
exceeds about 60° C., the heat in the housing
10
should be radiated outward. Particularly, since the heat in the housing
10
moves toward the side and upper portions of the housing
10
due to forced convection of the air generated as the hard disk
15
rotates, an effective radiation of heat at the cover frame
12
is further desirable.
However, thermal conductivity (about 15 W/mk) of the damper member
14
is lower than that (about 210 W/mk) of the housing
10
. Thus, the heat in the housing
10
does not dissipate well to the outside and effective radiation of heat cannot be expected.
SUMMARY OF THE INVENTION
To solve the above problem, it is an objective of the present invention to provide an apparatus for radiating heat in a hard disk drive having an improved structure to effectively radiate heat in the housing by having a radiation plate formed of a material exhibiting a higher thermal conductivity.
Accordingly, to achieve the above objective, there is provided a radiation apparatus of a hard disk drive which comprises a base frame; a spindle motor installed at the base frame; a hard disk rotatably supported by a rotation shaft of the spindle motor; a cover frame coupled to the base frame and having an opening formed therein; a radiation plate installed at the cover frame and formed of a copper alloy having a thermal conductivity higher than that of the cover frame; and means for coupling the rotation shaft and the radiation plate so that driving heat generated by the spindle motor can be directly transferred to the radiation plate.
Here, it is preferred in the present invention that the coupling means comprises a screw which penetrates the hole and is screw-coupled to a screw hole formed at an end portion of the rotation shaft.
Also, it is preferred in the present invention that the surface of the radiation plate is coated with nickel.


REFERENCES:
patent: 6108164 (2000-08-01), Weber, Jr.

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