Seal for a joint or juncture – Seal between fixed parts or static contact against... – Contact seal for other than internal combustion engine – or...
Reexamination Certificate
1999-10-01
2001-10-30
Knight, Anthony (Department: 3626)
Seal for a joint or juncture
Seal between fixed parts or static contact against...
Contact seal for other than internal combustion engine, or...
C277S644000, C277S654000, C360S100100, C360S097020
Reexamination Certificate
active
06308961
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a gasket in use for hard disk drive (referred to as “HDD” hereinafter) unit and, in particular, to those in use for HDD unit which are integrally assembled with a cover case of an HDD unit.
2. Brief Description of the Prior Art
FIG. 7
(PRIOR ART) is a cross-sectional view showing a partial structure of an ordinary conventional gasket of this type. In
FIG. 7
, a numerical sign
11
stands for a metallic base cover,
14
stands for a plastic resin layer having a vibration suppressing function,
15
stands for a metallic substrate which is laminated through the plastic resin layer
14
onto an external surface (a rear surface in
FIG. 7
) of the metallic base cover
11
. A through-hole
12
is opened on a desirable portion of the base cover
11
and penetrates from an internal surface (a front surface in
FIG. 7
) of the metallic base cover
11
to an outermost surface (a lowermost surface in
FIG. 7
) of the laminated metallic substrate
15
. A rubber
13
is embedded in the through-hole
12
, which penetrates through the metallic cover case
11
, plastic resin layer
14
and the metallic substrate
15
, to further protrude internally (upwardly in
FIG. 7
) toward a main body case of the HDD unit and to further protrude externally (downwardly in
FIG. 7
) to an open air ambient. A numerical and alphabetic character
13
a
represents aforesaid externally extruded portion of the rubber
13
.
FIG. 8A
(PRIOR ART) is a plan view and
FIG. 8B
(PRIOR ART) are a cross-sectional side view showing respectively a whole constitution of the conventional gasket mentioned above. The rubber
13
embedded in the metallic base cover
11
is provided with the desired shape and is stacked with the main body case of the HDD unit unshown in the figures on an opposite side of the externally protruded portion
13
a
thereby to seal an interior of the HDD unit.
However, since the protruded rubber portion
13
a
extrudes outwardly from the base cover
11
in the conventional gasket mentioned above, the rubber
13
is highly liable to be partially broken due to a contact with or an impact from obstacles which are located outside. When a breakdown of the rubber
13
begins at the outwardly extruded portion
13
a
then propagating into an inside of the rubber
13
, a serious problem that a spatial continuity takes place from an internal sealed portion of the HDD unit through the broken portion of the rubber
13
and the through-hole
12
to the open air ambient which extends to be a leakage arises.
Since the through-hole
12
is provided entirely over the base cover
11
, another problem that it is very difficult to open the through-hole (anchor-hole) if the metallic plates
11
and
15
are thick arises. On the other hand, when an adhesive is employed instead of the through-hole, a still another problem arises that gases included in the adhesive evaporate into the interior of the HDD unit.
SUMMARY OF THE INVENTION
The present invention is carried out to solve the problems mentioned above. An object of the invention is to provide a gasket in use for HDD unit which excludes completely an open air ambient thereby to be capable of preventing any leakage from generation, simultaneously does not necessiate to employ any adhesives and is easy to manufacture.
To satisfy the purposes mentioned above, the gasket in use for HDD unit according to the present invention is constituted as follows:
(1) A gasket in use for HDD unit, wherein:
aforesaid gasket is formed of an elastic member for sealing use which is embedded in a metallic base cover;
the elastic member is included in a through-hole, which is opened on a desired portion of the base cover and penetrates the base cover from an internal surface to an external surface of the base cover, and further extruded internally from the internal surface of the base cover toward a main body case of an HDD unit so as to take a desired shape as well as further extruded externally from the external surface of the base cover toward an open air ambient; and
a metallic substrate is laminated through a vibration suppressing member onto an outside surface of the elastic member which is extruded onto the external surface of the base cover.
(2) A gasket in use for HDD unit, wherein:
aforesaid gasket is formed of an elastic member for sealing use which is embedded in a metallic base cover;
the elastic member is included in a through-hole, which is opened on a desired portion of the base cover and penetrates the base cover from an internal surface to an external surface of the base cover, and is extruded further internally from the internal surface of the base cover toward a main body case of an HDD unit so as to take a desired shape as well as is further extruded externally from the external surface of the base cover toward an open air ambient; and
a metallic substrate is laminated onto an outside surface of the elastic member which is extruded onto the external surface of the base cover.
(3) A gasket in use for HDD unit, wherein:
aforesaid gasket is formed of an elastic member for sealing use which is embedded in a metallic base cover;
the elastic member is included in a through-hole, which is opened on a desired portion of the base cover and penetrates the base cover from an internal surface to an external surface of the base cover, and is extruded further internally from the internal surface of the base cover toward a main body case of an HDD unit so as to take a desired shape as well as is further extruded externally from the external surface of the base cover toward an open air ambient;
a metallic substrate is laminated onto an outside surface of the elastic member which is extruded onto the external surface of the base cover; and
the metallic substrate is fixed with the base cover by means of caulking peripheries of the metallic substrate.
(4) A gasket in use for HDD unit, wherein:
aforesaid gasket is formed of an elastic member for sealing use which is disposed inside a metallic base cover;
the elastic member is extruded internally toward a main body case of an HDD unit so as to take a desired shape; and
peripheries of aforesaid base cover is covered by surrounding with aforesaid elastic member.
(5) In constitutions described in (1)-(4), a vulcanized rubber having an sealing ability and an outgoing gas suppressing ability is employed as the elastic member.
(6) In constitutions described in (1)-(4), a thermoplastic elastomer having an sealing ability and an outgoing gas suppressing ability is employed as the elastic member.
REFERENCES:
patent: 3720420 (1973-03-01), Jelinek
patent: 5021905 (1991-06-01), Sleger
patent: 5687975 (1997-11-01), Inciong
patent: 5999374 (1999-12-01), Kim
patent: 6-89562 (1994-03-01), None
patent: 8-218057 (1996-08-01), None
patent: 9-159027 (1997-06-01), None
patent: 9-282860 (1997-10-01), None
patent: 11-328945 (1999-11-01), None
Kunikane Takahiro
Yagenji Sumihiko
Knight Anthony
Kokoku Intech Co. Ltd.
Narasimhan Meera P.
Peavey Enoch
Wray John Creighton
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