Patent ID: 8402696

Claim:
A weather strip, comprising: a trim portion that has a substantially U-shaped form of a sectional plane thereof, that is mounted on a flange portion provided along a door opening circumference portion of a vehicle, and that is equipped with a vehicle outer-sided side wall portion, a vehicle inner-sided side wall portion, and a coupling portion for coupling both the side wall portions to each other; and a seal portion comprising a hollow portion, in which the seal portion contacts a circumferential portion of a door of the vehicle under pressure when the door is closed, wherein the seal portion comprises: a first elongated portion which is elongated to a vehicle outer side from a portion located in a vicinity of a boundary portion between the seal portion and the coupling portion of the vehicle outer-sided side wall portion; a second elongated portion which is elongated to the vehicle outer side from a portion located in a vicinity of a tip portion of the vehicle outer-sided side wall portion; and an expanded portion having substantially an arc shape, which constitutes a convex shape on the vehicle outer side, the expanded portion coupling a tip portion of the first elongated portion to a tip portion of the second elongated portion, wherein the first and second elongated portions comprise a same material, and the expanded portion comprises a sponge material, wherein the weather strip further comprises: a bridge for coupling the expanded portion to a portion located in a vicinity of a boundary portion between the bridge and a first extended portion of the vehicle outer-sided side wall portion within the hollow portion, and for dividing the hollow portion into a first hollow portion on an inner circumferential side of the door opening, and a second hollow portion on an outer circumferential side of the door opening; and a portion within the expanded portion, which forms the first hollow portion, said portion within the expanded portion abuts against the circumferential portion of the door and is depressed to a vehicle inner side when the door is closed, wherein the expanded portion comprises: a thicker-thickness portion comprising a portion which abuts against the circumferential portion of the door when the door is closed, the thicker-thickness portion being located at the first hollow portion; and a thinner-thickness portion located between the thicker-thickness portion and a contact portion of the bridge, and between the thicker-thickness portion and a tip portion of the first elongated portion, wherein the bridge comprises the sponge material, wherein a lip portion is located between the expanded portion to and an inner circumferential side of a door opening, and wherein a thickness of an entirety of the portion of the thicker-thickness portion which abuts against the circumferential portion of the door is greater that a thickness of an entirety of a remaining portion of the first hollow portion other than the portion of the thicker-thickness portion which abuts against the circumferential portion of the door.