A bearing for a bicycle has an outer collar, an inner collar, and an annular gasket. The outer collar is made of self-lubricating material. The inner collar is made of self-lubricating material and is mounted rotatably in the outer collar. The annular gasket is mounted between the outer collar and the inner collar, abuts with corresponding surfaces of the outer collar and the inner collar, and is made of a material having a hardness harder than a hardness of the materials for the inner collar and the outer collar.

A device for producing a releasable clearance-free position of a rolling bearing, having a rolling bearing which has an outer ring, an inner ring mounted on a shaft and a plurality of rolling elements arranged between the inner ring and the outer ring, and having a tensioning device mounted on the circumference of the rolling bearing outer ring for generating a radial preload which is uniform over the outer circumference of the rolling bearing outer ring between the tensioning device and the rolling bearing outer ring, wherein the tensioning device has an axially adjustable tensioning element which can be brought into a first alignment in which the rolling bearing has play, and which can be brought into a second alignment in which the rolling bearing is free of play. A corresponding method is also described.

A device for producing a releasable clearance-free position of a rolling bearing, having a rolling bearing which has an outer ring, an inner ring mounted on a shaft and a plurality of rolling elements arranged between the inner ring and the outer ring, and having a tensioning device mounted on the circumference of the rolling bearing outer ring for generating a radial preload which is uniform over the outer circumference of the rolling bearing outer ring between the tensioning device and the rolling bearing outer ring, wherein the tensioning device has an axially adjustable tensioning element which can be brought into a first alignment in which the rolling bearing has play, and which can be brought into a second alignment in which the rolling bearing is free of play. A corresponding method is also described.

A supercharging device includes a rotor mounted in a housing via an axial bearing disposed on an end side of the rotor. The axial bearing includes an axial bearing disc with a first bearing surface, a membrane with a central first opening, and a screw connection that secures the axial bearing disc to the membrane through the central first opening. The axial bearing further includes a bush with a central second opening, wherein the bush is connected to the housing and the membrane is clamped in between the bush and the housing, and an adjusting screw screwed into the central second opening of the bush, wherein the adjusting screw delimits and facilitates an axial movement of the screw connection and thus of the axial bearing disc.

A supercharging device includes a rotor mounted in a housing via an axial bearing disposed on an end side of the rotor. The axial bearing includes an axial bearing disc with a first bearing surface, a membrane with a central first opening, and a screw connection that secures the axial bearing disc to the membrane through the central first opening. The axial bearing further includes a bush with a central second opening, wherein the bush is connected to the housing and the membrane is clamped in between the bush and the housing, and an adjusting screw screwed into the central second opening of the bush, wherein the adjusting screw delimits and facilitates an axial movement of the screw connection and thus of the axial bearing disc.

An end member (30) comprises: a tubular bearing member (40); and a shaft member (50), wherein the shaft member comprises: a shaft-like rotating shaft (51) which is disposed coaxially to the bearing member, and moves in the shaft line direction by rotating around a shaft line with respect to the bearing member; and a tip end member (55) which is disposed coaxially to the rotating shaft, and where a rotating force receiving member (58) provided with an engaging member (60) which engages with a driving shaft (70) of the image forming apparatus main body is disposed at a tip end, wherein a rotating force around the shaft line is transmitted to the rotating force receiving member, the rotating shaft, and the bearing member, in this order, and the rotating force receiving member moves to be inclined with respect to the shaft line.

An end member (30) comprises: a tubular bearing member (40); and a shaft member (50), wherein the shaft member comprises: a shaft-like rotating shaft (51) which is disposed coaxially to the bearing member, and moves in the shaft line direction by rotating around a shaft line with respect to the bearing member; and a tip end member (55) which is disposed coaxially to the rotating shaft, and where a rotating force receiving member (58) provided with an engaging member (60) which engages with a driving shaft (70) of the image forming apparatus main body is disposed at a tip end, wherein a rotating force around the shaft line is transmitted to the rotating force receiving member, the rotating shaft, and the bearing member, in this order, and the rotating force receiving member moves to be inclined with respect to the shaft line.

A connection structure and an electronic device having the same are provided. The connection structure comprises a first driving unit including a first gear and a second gear that are connected coaxially, a radius of the first gear being different from a radius of the second gear; a second driving unit coupled to the first driving unit; a first rotation shaft operatively coupled to the first driving unit; and a second rotation shaft operatively coupled to the second driving unit. The first rotation shaft and the second rotation shaft rotate synchronously via actions of the first driving unit and the second driving unit.

A connection structure and an electronic device having the same are provided. The connection structure comprises a first driving unit including a first gear and a second gear that are connected coaxially, a radius of the first gear being different from a radius of the second gear; a second driving unit coupled to the first driving unit; a first rotation shaft operatively coupled to the first driving unit; and a second rotation shaft operatively coupled to the second driving unit. The first rotation shaft and the second rotation shaft rotate synchronously via actions of the first driving unit and the second driving unit.

An end member (30) comprises: a tubular bearing member (40); and a shaft member (50), wherein the shaft member comprises: a shaft-like rotating shaft (51) which is disposed coaxially to the bearing member, and moves in the shaft line direction by rotating around a shaft line with respect to the bearing member; and a tip end member (55) which is disposed coaxially to the rotating shaft, and where a rotating force receiving member (58) provided with an engaging member (60) which engages with a driving shaft (70) of the image forming apparatus main body is disposed at a tip end, wherein a rotating force around the shaft line is transmitted to the rotating force receiving member, the rotating shaft, and the bearing member, in this order, and the rotating force receiving member moves to be inclined with respect to the shaft line.