Patent ID: 11963317
Assignee: NITTO DENKO CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A ventilation assembly to be fixed to a tubular projection extending to project from an outer surface of a housing and internally having a first space communicating the inside and the outside of the housing, the ventilation assembly comprising:
an internal member being a tubular body having an opening at a first end portion and an opening at a second end portion;
an external member being a tubular body having a bottom; and
a gas-permeable membrane covering the opening at the first end portion of the internal member, wherein
the external member is joined to the internal member with the internal member inserted in the interior of the external member from the first end portion side,
the ventilation assembly has a second space serving as a ventilation path connecting the gas-permeable membrane and the outside of the ventilation assembly in at least one selected from the inside of the internal member, the inside of the external member, and an interspace between the internal member and the external member joined together,
the internal member comprises two or more first projecting portions projecting from an inner peripheral surface at a position spaced from the first end portion side with respect to the gas-permeable membrane,
the two or more first projecting portions are joined to each other in an internal space of the internal member, and
each of the first projecting portions is spaced apart from the gas-permeable membrane.