Gasket

#This application is a U.S. National Stage Application of International Application No. PCT/JP2015/067225, filed on Jun. 16, 2015, and published in Japanese as WO 2016/006393 A1 on Jan. 14, 2016. This application claims priority to Japanese Application No. 2014-139554, filed on Jul. 7, 2014. The entire disclosures of the above applications are incorporated herein by reference.

#Field of the Invention

#The present invention relates to a gasket which is a kind of a sealing device according to a sealing technology. The gasket according to the present invention is used, for example, as a gasket for a power control unit such as an inverter.

#FIGS. 1A, 1B, 1C and 1D are views showing a gasket according to an embodiment of the present invention, in which FIG. 1A is a plan view of the gasket, FIG. 1B is a partly enlarged plan view of the gasket and shows a portion B in FIG. 1A in an enlarged manner, FIG. 1C is a partly enlarged cross sectional view of the gasket and shows a cross section along a line C-C in FIG. 1A in an enlarged manner, and FIG. 1D is a partly enlarged cross sectional view of the gasket and shows a cross section along a line D-D in FIG. 1A in an enlarged manner;

#FIG. 2 is a cross sectional view of a substantial part and shows an installed state of the gasket;

#FIGS. 3A and 3B are partly plan views of a gasket according to the other embodiment of the present invention; and

#The following embodiments are included in the present invention.

#(1) An air vent is provided in a part of the gasket, the air vent having a width of a side face projection (a seal projection) which is made smaller than the groove width. The air vent is preferably structured such that the width of the side face projection is depressed with a curvature between R3 and R20 in the longitudinal direction of the gasket, more preferably with a curvature between R5 and R15. The change of the compression stress applied to the side face projection is uniform by the provision of the curvature, and it is possible to suppress the disorder of the installation attitude at a position of the air vent.

#(2) It is possible to suppress the sealing of the air at a time of installing the gasket by the provision of the air vent in the present gasket, and an installing workability is improved.