Patent ID: 7412743
Filing Date: 2008-08-19
Classification: B60R,B60S

Abstract:
1. A wiper for an automobile rear-view mirror comprising a rear-view mirror, a wiper transmission device, a connecting rod, a wiper and a positioning member; wherein the rear-view mirror has a front side provided with a mirror surface which has an upper corner bored with an insert hole extending through a rear side of the rear-view mirror, and the rear side of the rear-view mirror is bored with a plurality of threaded holes; the wiper transmission device installed at the rear side of the rear-view mirror is composed of a base, a cover, a transmission motor, a speed-change gear unit and a driven gear; the base is formed with a first accommodating chamber and an interior thereof has a bearing with a shaft hole; the first accommodating chamber is disposed with two recessed positioning holes in the interior; the base further has an outer circumferential edge disposed with a plurality of lugs spaced apart and respectively bored with an insert hole; the cover to be covered on the base is formed with a second accommodating chamber and has an outer circumferential edge fixed with plural lugs spaced apart to match with the lugs of the base and respectively having an insert hole; a plurality of locking bolts are respectively inserted through the insert holes of the cover and the insert holes of the base and firmly screwed in the threaded holes at the rear side of the rear-view mirror for fixing the base on the rear side of the rear-view mirror; the cover is fixed with a motor holder having an inner side bored with an insert hole communicating with the accommodating chamber, which is bored with two recessed positioning holes in the inner side; the transmission motor is nearly half received in the motor holder of the cover and has a rotating shaft fixed thereon with a driving gear inserted through the insert hole in an inner side of the motor holder and then positioned in the accommodating chamber of the cover; the speed-change gear unit is installed in the first accommodating chamber of the base and the first accommodating chamber of the cover, having two support shafts respectively fitted thereon with plural different-sized gears engaged with each other; each of the two support shafts has one end respectively inserted and positioned in the recessed positioning hole of the base and a further end positioned in the recessed positioning hole of the cover; a first gear of the speed-change gear unit is engaged with the driving gear of the transmission motor; the driven gear is positioned in the first accommodating chamber of the base and engaged with a second gear of the speed-change gear unit; the driven gear is provided with a rotating shaft inserted through both the shaft hole of the bearing and the insert hole of the rear-view mirror; the connecting rod is connected with the rotating shaft of the driven gear and positioned on the front side of the rear-view mirror; the connecting rod is bored with a shaft hole for the rotating shaft to be inserted and positioned stably therein; the wiper fitted on the connecting rod is made of soft material and provided with an elastic strip in the interior so that when the wiper is swayed and has an end pushing against an edge of the mirror surface, an outer end of the wiper is elastic and capable of being curved; the outer end of the wiper closely contacts with the surface of the rear-view mirror; and the positioning member is fixed at one side of the connecting rod and firmly fitted on an outer end of the rotating shaft of the driven gear; the positioning member is bored inside with a recessed hole having a projecting ring secured in an interior for fixing one end of the connecting rod on the rotating shaft of the driven gear, thus finishing assembly of the wiper for the rear-view mirror.