Patent ID: 7543357

Claim:
A folding device comprising: a fixed member having a fixed cam disposed on a side face thereof; a movable member arranged for rotation with respect to said fixed member and having a movable cam disposed on a face thereof in confronting relation with said fixed cam; a movable case, having a substantially cylindrical shape, housing said fixed member and said movable member such that said fixed member is rotatable relative to said movable case, said movable case formed on an outer periphery thereof with one of a convex wall portion and a concave groove portion; a movable housing, said movable case being insertable in said movable housing; and a holding member rotatably mounted to an end portion of said movable case; wherein said holding member is provided with a protruded portion extending outward; wherein said holding member is rotatable to a position in which said protruded portion protrudes outwardly beyond one of said outer periphery of said movable case and said concave groove portion of said movable case; and wherein said movable housing is configured such, that when said movable case is inserted in said movable housing and said holding member is rotated so that said protruded portion protrudes outward beyond said one of said outer periphery of said movable case and said concave groove portion, said movable case is fixedly attached to said movable housing by said holding member.