Abstract: A surface decoration structure includes an undercoat film, a silver mirror film layer, and a topcoat film formed on a surface of a substrate. The silver mirror film layer includes a film of stacked nanometer-sized silver particles having surfaces coated with a polymer dispersing agent, and the topcoat film includes, as a solvent, at least one member selected from the group consisting of an aliphatic hydrocarbon compound, an aliphatic hydrocarbon compound solution including 10% by mass or less of an aromatic compound, and diisobutyl ketone. The undercoat film and/or the topcoat film may include a corrosion inhibitor. The silver mirror film layer may further include a corrosion inhibitor. The surface decoration structure includes the silver mirror film layer with improved luster and corrosion resistance.

Abstract: A bicycle rim printing apparatus comprises a non-contact printer to print a non-contact printed deposit to an annular rim body, a rim holder to hold the annular rim body, and a rotational actuator to rotate the rim holder relative to the non-contact printer about a rotational axis.

Abstract: A resin molded body includes a body having a surface, and a decorative sheet adhered to the surface of the body. The decorative sheet has a metallic luster layer, a transparent protective layer positioned on an outer side of the metallic luster layer, and a welding layer adhered to the surface of the body. The body is formed from a fiber-reinforced resin having reinforcing fibers defining an anchor structuring layer such that the reinforcing fibers of the body bite into the welding layer at a boundary portion between the welding layer and the body such that the boundary portion has an uneven shape.

Abstract: An actuator includes a motor including a first rotor rotatable in a circumferential direction about a center axis extending in a vertical direction, a second rotor including a sensor magnet and rotatable in the circumferential direction about the center axis, and a speed reducer that reduces rotation of the first rotor and transmits a torque to the second rotor. The motor includes a stationary portion including a stator facing the first rotor and a first bearing rotatably supporting the first rotor with respect to the stationary portion. The stationary portion includes a sensor which faces a portion of a trajectory of the sensor magnet rotating in the circumferential direction and detects a rotation position of the sensor magnet.

Abstract: A transmission includes a first shaft that is rotatable in a circumferential direction about a central axis extending in one direction, a second shaft that is rotatable in the circumferential direction and in series with the first shaft in an axial direction in which the central axis extends, a tubular housing, an internal gear including an internal tooth portion, and held by an inner surface of the housing, an annular external gear connected to the second shaft, and including an external tooth portion that partially meshes with the internal tooth portion, and a wave generator connected to the first shaft to deform the external gear such that meshing positions between the internal tooth portion and the external tooth portion shift in the circumferential direction. The internal gear and the housing are defined by separate members.

Abstract: An actuator includes a motor including a first rotor rotatable in a circumferential direction about a center axis extending in a vertical direction, a second rotor including a sensor magnet and rotatable in the circumferential direction about the center axis, and a speed reducer that reduces rotation of the first rotor and transmits a torque to the second rotor. The motor includes a stationary portion including a stator facing the first rotor and a first bearing rotatably supporting the first rotor with respect to the stationary portion. The stationary portion includes a sensor which faces a portion of a trajectory of the sensor magnet rotating in the circumferential direction and detects a rotation position of the sensor magnet.

Abstract: A bicycle rim printing apparatus comprises a non-contact printer to print a non-contact printed deposit to an annular rim body, a rim holder to hold the annular rim body, and a rotational actuator to rotate the rim holder relative to the non-contact printer about a rotational axis.

Abstract: A bicycle rim comprises a tire-attachment portion, an inner peripheral portion, a first side portion, a second side portion, and a first non-contact printed deposit. The inner peripheral portion is provided radially inwardly from the tire-attachment portion with respect to a rotational center axis of the bicycle rim. The first side portion includes a first curved surface. The first non-contact printed deposit is at least partly provided on the first curved surface. A first tangential line is defined on the first curved surface in which the first non-contact printed deposit is provided. A first surface angle is defined by the first tangential line and a reference plane perpendicular to the rotational center axis. The first surface angle is larger than 30 degrees.

Abstract: A bicycle disc brake rotor is basically provided with a main body and a heat release layer. The main body is made of a metallic material. The main body includes an outer portion, an inner portion and a cooling facilitation part. The outer portion has oppositely facing braking surfaces. The heat release layer includes a non-metallic material. The heat release layer at least partially overlies the cooling facilitation part.

Abstract: A resin molded body includes a body having a surface, and a decorative sheet adhered to the surface of the body. The decorative sheet has a metallic luster layer, a transparent protective layer positioned on an outer side of the metallic luster layer, and a welding layer adhered to the surface of the body. The body is formed from a fiber-reinforced resin having reinforcing fibers defining an anchor structuring layer such that the reinforcing fibers of the body bite into the welding layer at a boundary portion between the welding layer and the body such that the boundary portion has an uneven shape.

Abstract: A slide component comprises a base member and a plated layer. The base member is made of a titanium alloy including beta phase of titanium. The base member includes a surface having a plurality of recesses. The plated layer is provided on the surface of the base member.

Abstract: An actuator includes a motor including a first rotor rotatable in a circumferential direction, and a stator to drive the first rotor; a second rotor rotatable in the circumferential direction; and a speed reducer that reduces rotation of the first rotor and transmits a torque to the second rotor via a bearing. The first and second rotors include first and second tube portions extending in an axial direction, respectively. The second tube portion is radially outward of the first tube portion. A lubricant is filled in a filling space including at least a portion of a space between an outer surface of the first tube portion and an inner surface of the second tube portion. The actuator includes a width reducing portion that reduces a width of the filling space in a radial direction in at least a portion of the filling space in the axial direction.

Abstract: A composite bicycle component includes a first member made of a metallic material. The first member has a surface with a first dimple. The first dimple includes a second dimple that is formed on the first dimple. Preferably, the composite bicycle component further includes a second member attached to the first member so that a part of the second member extends into the first and second dimples.

Abstract: A bicycle component comprises a base member and a first alumite layer. The base member is made of an aluminum alloy. The first alumite layer is provided on the base member. The first alumite layer has a thickness that is equal to or larger than 1.0 ?m.

Abstract: A transmission includes a first shaft that is rotatable in a circumferential direction about a central axis extending in one direction, a second shaft that is rotatable in the circumferential direction and in series with the first shaft in an axial direction in which the central axis extends, a tubular housing, an internal gear including an internal tooth portion, and held by an inner surface of the housing, an annular external gear connected to the second shaft, and including an external tooth portion that partially meshes with the internal tooth portion, and a wave generator connected to the first shaft to deform the external gear such that meshing positions between the internal tooth portion and the external tooth portion shift in the circumferential direction. The internal gear and the housing are defined by separate members.

Abstract: A transmission includes a first shaft rotatable in a circumferential direction about a central axis extending in one direction, a second shaft rotatable in the circumferential direction and in series with the first shaft in an axial direction in which the central axis extends, an internal gear including an internal tooth portion, a housing that houses the internal gear therein, an annular external gear connected to the second shaft and including an external tooth portion that partially meshes with the internal tooth portion, a cam that is rotatable together with the first shaft, and includes a connection hole that houses a portion of the first shaft, and a bearing between an inner circumferential surface of the external gear and an outer circumferential surface of the cam. The cam includes an inner circumferential surface defining the connection hole and a recessed portion recessed in radial directions centered on the central axis.

Abstract: A transmission includes a first shaft rotatable in a circumferential direction about a central axis extending in one direction, a second shaft rotatable in the circumferential direction and in series with the first shaft in an axial direction in which the central axis extends, an internal gear including an internal tooth portion, a housing that houses the internal gear therein, an annular external gear connected to the second shaft and including an external tooth portion that partially meshes with the internal tooth portion, a cam that rotates together with the first shaft, and including a connection hole that houses a portion of the first shaft, and a bearing located between an inner circumferential surface of the external gear and an outer circumferential surface of the cam. An outer circumferential surface of the portion of the first shaft housed in the connection hole includes a recessed portion recessed in radial directions centered on the central axis.

Abstract: A bicycle sprocket is provided that is configured to limit a chain separation. The bicycle sprocket includes a sprocket body and a plurality of teeth. The sprocket body has a rotational center axis. The plurality of teeth includes a first tooth having a first width extending in a rotational center axis direction, and a second tooth having a second width extending in the rotational center axis direction. The second width is smaller than the first width. The plurality of teeth includes a base body and a nickel plating layer. The nickel plating layer covers at least a portion of the base body. The nickel plating layer includes at least one of phosphorus and boron.

Abstract: A bicycle rim comprises a tire-attachment portion, an inner peripheral portion, a first side portion, a second side portion, and a first non-contact printed deposit. The inner peripheral portion is provided radially inwardly from the tire-attachment portion with respect to a rotational center axis of the bicycle rim. The first side portion includes a first curved surface. The first non-contact printed deposit is at least partly provided on the first curved surface. A first tangential line is defined on the first curved surface in which the first non-contact printed deposit is provided. A first surface angle is defined by the first tangential line and a reference plane perpendicular to the rotational center axis. The first surface angle is larger than 30 degrees.

Abstract: A bicycle component comprises a base member and a first alumite layer. The base member is made of an aluminum alloy. The first alumite layer is provided on the base member. The first alumite layer has a thickness that is equal to or larger than 1.0 ?m.