Abstract: A telescopic shaft includes: an inner shaft where a pair of recessed grooves that face each other in a direction perpendicular to an axis and extend in an axial direction are formed; an outer shaft where a pair of recessed grooves that face each other in the direction perpendicular to the axis and extend in the axial direction are formed; a plurality of rolling bodies that are disposed between each of the recessed grooves and the corresponding recessed groove so as to form a line in the axial direction; a pair of stoppers; and a buffer body unit. Each of the stoppers restricts falling of a rolling body at an end portion of the corresponding line from the corresponding recessed groove of the inner shaft. The buffer body unit integrally includes a pair of buffer bodies, and a connection portion that connects the pair of buffer bodies.

Abstract: A telescopic shaft includes an inner shaft, an outer shaft, a plurality of rolling bodies that are disposed between recessed grooves of the inner shaft and the outer shaft and form a line in an axial direction, a stopper, and a buffer body. The stopper restricts falling of the rolling bodies from the recessed groove of the inner shaft. The buffer body is interposed between the stopper and a rolling body at an end portion of the line. An end surface of the buffer body includes an inclined abutment portion that is inclined with respect to a plane perpendicular to an axis of the inner shaft. The abutment portion abuts against the rolling body at the end portion of the line at a stroke end of the inner shaft with respect to the outer shaft.

Abstract: A telescopic shaft includes an inner shaft, an outer shaft, a plurality of rolling bodies that are disposed between recessed grooves of the inner shaft and the outer shaft and form a line in an axial direction, a stopper, and a buffer body. The stopper restricts falling of the rolling bodies from the recessed groove of the inner shaft. The buffer body is interposed between the stopper and a rolling body at an end portion of the line. An end surface of the buffer body includes an inclined abutment portion that is inclined with respect to a plane perpendicular to an axis of the inner shaft. The abutment portion abuts against the rolling body at the end portion of the line at a stroke end of the inner shaft with respect to the outer shaft.

Abstract: A telescopic shaft includes: an inner shaft where a pair of recessed grooves that face each other in a direction perpendicular to an axis and extend in an axial direction are formed; an outer shaft where a pair of recessed grooves that face each other in the direction perpendicular to the axis and extend in the axial direction are formed; a plurality of rolling bodies that are disposed between each of the recessed grooves and the corresponding recessed groove so as to form a line in the axial direction; a pair of stoppers; and a buffer body unit. Each of the stoppers restricts falling of a rolling body at an end portion of the corresponding line from the corresponding recessed groove of the inner shaft. The buffer body unit integrally includes a pair of buffer bodies, and a connection portion that connects the pair of buffer bodies.

Abstract: A damper mechanism includes an outer pipe and an inner member. The outer pipe has first inward convex portions, second inward convex portions, and concave grooves extending along the axial direction and alternately formed in the circumferential direction at the inner periphery thereof. Outward convex portions are formed in the circumferential direction at a plurality of portions on the outer periphery of the inner member. An elastic body is provided between the outer pipe and the inner member. The elastic body includes thick wall portions and thin wall portions. The thick wall portion is provided between one side face of the outward convex portion and the first inward convex portion. The thin wall portion is provided between the other side face of the outward convex portion and the second inward convex portion.

Abstract: A damper mechanism includes an outer pipe and an inner member. The outer pipe has first inward convex portions, second inward convex portions, and concave grooves extending along the axial direction and alternately formed in the circumferential direction at the inner periphery thereof. Outward convex portions are formed in the circumferential direction at a plurality of portions on the outer periphery of the inner member. An elastic body is provided between the outer pipe and the inner member. The elastic body includes thick wall portions and thin wall portions. The thick wall portion is provided between one side face of the outward convex portion and the first inward convex portion. The thin wall portion is provided between the other side face of the outward convex portion and the second inward convex portion.