One-way clutch and one-way clutch-equipped rotating damper device

A one-way clutch comprising:

• a rotary shaft rotatable around a shaft center;
• a slide member that is supported by the rotary shaft slidably to a radial direction orthogonal to a direction of the shaft center, is rotatable around the shaft center integrally with the rotary shaft, and has, on both end portions of a sliding direction, pawl portions projecting outward in the radial direction;
• and
• a gear member having a cylindrical member that is supported by the rotary shaft relatively rotatable around the shaft center and houses the slide member, a plurality of outer teeth projecting outward in the radial direction from an outer peripheral surface of the cylindrical member, and a plurality of inner teeth projecting inward in the radial direction from an inner peripheral surface of the cylindrical member;
• wherein
• a groove portion is formed in one of an outer peripheral surface of the rotary shaft and one side of an inner peripheral surface of the cylindrical member in the gear member,
• a protrusion portion fittable to the groove portion is formed on the other one of the outer peripheral surface of the rotary shaft and the inner peripheral surface of the cylindrical member in the gear member,
• the gear member is supported by the rotary shaft by the groove portions and the protrusion portions fitting to each other,
• a dimension between a tip end of one pawl portion and a tip end of another pawl portion is more than a diameter of a circle that is centered at the shaft center and passes through the tip ends of the plurality of inner teeth,
• the pawl portion has a withdrawal surface that abuts the inner teeth by the gear member rotating toward one side with respect to the rotary shaft and an engaging surface that abuts the inner teeth by the gear member rotating toward an other side with respect to the rotary shaft,
• the slide member slides in the sliding direction, the pawl portion withdraws from the inner teeth and the gear member rotates independently of the rotary shaft in a case where the inner teeth and the withdrawal surface abut each other when the gear member rotates toward the one side, and the inner teeth and the engaging surface engage with each other and the gear member and the rotary shaft rotate integrally in a case where the inner teeth and the engaging surface abut each other when the gear member rotates toward the other side,
• the rotary shaft has a plurality of shaft piece portions divided in a circumferential direction by a slit formed along a direction of the shaft center from a tip end portion of the rotary shaft, and the groove portion is formed in an outer peripheral surface of the shaft piece portions,
• the slit is provided to bend the shaft piece portions when the protrusion portion is fitted to the groove portion.