| 摘要 |
A ventilation member (10) includes an air-permeable membrane (2), a support body (4), a cover body (6), and a column portion (8). The support body (4) has a through hole (14) serving as an air passage. The through hole (14) includes (a) a first portion (14a) having a relatively large inner diameter and (b) a second portion (14b) having a relatively small inner diameter. An annular ridge portion (12) is formed on an outer peripheral surface of the support body (4) along a circumferential direction of the support body (4). When the housing (20) has a nozzle opening portion (22), the ventilation member (10) is attached to the housing (20) by inserting the nozzle opening portion 22 into the support body 4. When the housing (20) has a recess opening portion (24), the ventilation member (10) is attached to the housing (20) by fitting the support body (4) into the recess opening portion (24). |
| 主权项 |
1. A ventilation member attachable to a housing having an opening portion for ventilation, the ventilation member comprising:
a cylindrical support body having a through hole serving as an air passage between an interior space and an exterior space of the housing; an air-permeable membrane closing the through hole; a cover body provided at a position facing the air-permeable membrane so as to protect the air-permeable membrane; and a column portion provided between the cover body and the support body, the column portion being formed integrally with both the cover body and the support body so as to fix the cover body to the support body, wherein the through hole includes (a) a first portion having a relatively large inner diameter and (b) a second portion having a relatively small inner diameter, an annular ridge portion is formed on an outer peripheral surface of the support body along a circumferential direction of the support body, and (i) when the housing has, as the opening portion, a nozzle opening portion projecting from a surface of the housing, the ventilation member can be attached to the housing by fitting the support body onto the nozzle opening portion so that an inner peripheral surface of the support body in the first portion is in close contact with an outer peripheral surface of the nozzle opening portion, and (ii) when the housing has, as the opening portion, a recess opening portion recessed from the surface of the housing, the ventilation member can be attached to the housing by fitting the support body into the recess opening portion so that the ridge portion is in close contact with an inner peripheral surface of the recess opening portion. |
