Patent ID: 8277295
Filing Date: 2012-10-02
Classification: F21S,F21V,H05K

Abstract:
1. A ventilation member to be installed on a casing that needs ventilation, comprising: a support body provided with a space in an interior thereof, the space serving as a ventilation channel between an interior and an exterior of the casing, the support body having a bottom surface portion in which a first opening is formed, a top portion positioned on a side opposite to the bottom surface portion and a side surface portion in which a second opening is formed, the first and second openings bringing the space into communication with the exterior, and the support body being configured in such a manner that the bottom surface portion in which the first opening is formed serves as a connection portion to be connected to the casing; a ventilation membrane installed on the side surface portion of the support body so as to close the second opening; and a cover part inside of which the support body is fit in from a side opposite to the bottom surface portion, wherein, assuming a direction in which the support body is to be fit in inside the cover part to be an axial direction, then in an assembled state where the support body is fit in inside the cover part: the cover part has a cylindrical side wall portion that surrounds the support body in a circumferential direction and a ceiling portion that continues to one end side of the cylindrical side wall portion and covers the support body from the side opposite to the bottom surface portion; a length of the cylindrical side wall portion with respect to the axial direction is adjusted so that the ventilation membrane is protected in such a state where the membrane faces the cylindrical side wall portion; and a first clearance that functions as the ventilation channel is defined between the ceiling portion of the cover part and the top portion of the support body and a second clearance that communicates with the first clearance is defined between the cylindrical side wall portion of the cover part and the ventilation membrane in such a manner that the second clearance communicates with the exterior from a side opposite to the side where the ceiling portion of the cover part is positioned.