Patent ID: 9434234
Filing Date: 2016-09-06
CPC Classification: B60H

Claim Text:
1. The air passage opening/closing device comprising: a case which forms an air passage, a slide door which has a door body part made of plastic formed in a plate-shape, which is arranged to be able to slide in the case, and which opens and closes the air passage; and a gear mechanism which drives the slide door, wherein the case is formed with guide grooves which are positioned at two sides of the air passage in a width direction of the door body part and each of which is comprised of a case side seal surface which the door body part abuts against and a guide wall surface which faces the case side seal surface, two end parts of the door body part in the width direction are arranged inside of the guide grooves, the gear mechanism has at least one driven side gear which is provided at the door body part and at least one drive-side gear which engages with the driven side gear, the driven side gear is formed to extend in parallel with a movement direction of the slide door at a portion positioned at the inside in the width direction from the guide grooves at the door body part, a portion of the door body part facing the guide wall surface or a portion of the guide wall surface facing the door body part is formed with interposed parts which are interposed between the door body part and the guide wall surface, and said interposed parts have a bending rigidity in the movement direction of said slide door higher than the teeth of said driven side gear.