Patent ID: 7491906

Claim:
A seat belt apparatus comprising: a rotatable spindle around which a webbing is wound; a drive gear that is driven by rotation of the spindle; a switch configured to be shifted and outputting an ON/OFF signal in response to at least one of a belt-worn-state and a belt-not-worn-state; a switch lever configured for shifting to a first position and a second position so as to shift the switch; a first gear which engages the drive gear and oscillates together with the switch lever; a second gear which engages the first gear; a first projecting portion and a second projecting portion are provided on a side of the drive gear and a side of the first gear, respectively, the first and second projecting portions configured to be brought into abutment with each other so that the switch lever is shifted from the first position to the second position; a third projecting portion and a fourth projecting portion are provided on the side of the first gear and a side of the second gear, respectively, the third and fourth projecting portions configured to be brought into abutment with each other so that the switch lever is shifted from the second position to the first position; and an abutment position between the first and second projecting portions and an abutment position between the third and fourth projecting portions differ from each other in an axial direction of the spindle so as to prevent unintentional interference between the projecting portions.