Patent ID: 8120715

Claim:
A torque limiter comprising: a first rotating member integrally provided with a plurality of fragment portions in a concentric manner and having a spring storage portion enclosed with said plurality of fragment portions; a second rotating member having a lid portion arranged to cover said spring storage portion of said first rotating member and a fit portion fitted with the outer peripheral surfaces of said plurality of fragment portions of said first rotating member; a spring member press-fitted into said spring storage portion enclosed with the inner peripheral surfaces of said plurality of fragment portions of said first rotating member thereby bringing said plurality of fragment portions into pressure contact with said fit portion of said second rotating member, for transmitting driving torque in response to pressure contact force applied by said spring member, wherein said first rotating member further has a first shaft receiving portion at the center of said first rotating member while said second rotating member further has a second shaft receiving portion provided at the center of said second rotating member to correspond to said first shaft receiving portion; the torque limiter further comprises a fixed shaft portion inserted into said first shaft receiving portion of said first rotating member and said second shaft receiving portion of said second rotating member for rotatably supporting said first rotating member and said second rotating member; said fixed shaft portion is integrally provided with a first engaging portion, and said second shaft receiving portion is integrally provided with a second engaging portion rotatably engaging with said first engaging portion of said fixed shaft portion; and said first engaging portion is a groove portion peripherally provided on the outer peripheral surface of said fixed shaft portion, and said second engaging portion is a protrusion engaging with said groove portion.