Patent ID: 9616618
Date: 2017-04-11
CPC Classifications: B29C,B29K,B29L,F21S,F21V,H05K

Claim:
1. A vent structure comprising: a resin component having an opening portion for ventilation; a gas-permeable membrane that is attached to the resin component to close the opening portion, the gas-permeable membrane having: a main body including a fluororesin film and a reinforcing member laminated with the fluororesin film by welding or bonding; and a porous resin sheet that is laid on the main body; and a laser welding portion that is formed around the opening portion to lie between the resin component and the gas-permeable membrane and that joins the resin component with the gas-permeable membrane, wherein the reinforcing member comprises a woven fabric, a nonwoven fabric, a net, or a mesh, the porous resin sheet is located on a surface side of the vent structure, when the gas-permeable membrane is viewed in a plane, an area of the porous resin sheet is larger than an area of the main body and the main body is fitted entirely in the porous resin sheet, the porous resin sheet has an outer peripheral portion that projects outwardly from an outer peripheral edge of the main body in an in-plane direction perpendicular to the thickness direction of the gas-permeable membrane, both of the main body and the outer peripheral portion of the porous resin sheet are fixed directly to a first portion of the surface of the resin component and a second portion of a surface of the resin component respectively by the laser welding portion, and the first portion is different from the second portion, and a thickness of the porous resin sheet is greater than that of the main body.