Abstract: A sensor includes a structure and a detector. The detector is arranged to detect a deformation of the structure. The structure has at least four elastic sections. The at least four elastic sections are discretely disposed in an imaginary plane.

Abstract: A method of producing a molded product includes preparing a mold for insert molding in which a cavity corresponding to a molded product including a trunk portion and an arm portion is defined, disposing an insert member including a bent portion and a first extending portion extending from the bent portion in a state in which one side of the insert member is supported in the cavity such that the first extending portion is downstream of the bent portion in a flow direction of molten resin, wherein the mold includes, on a wall surface defining a space corresponding to the arm portion in the cavity, a first projecting portion that supports a part of a surface of the first extending portion positioned on a major angle side of the bent portion, and injecting molten resin into the cavity.

Abstract: A roller member used in an image forming apparatus includes a metallic shaft, and the metallic shaft includes a cylindrical portion formed of a metallic plate, and a projecting portion projecting outward from end surfaces of the cylindrical portion, wherein end portions of the metallic plate each include a straight portion, projections, and depressions, the projections on the one end portion engage the depressions on the other end portion, the depressions on the one end portion engage the projections on the other end portion, and the straight portions on both end portions oppose each other, a straight area is positioned on an end portion of the cylindrical portion, a projection and depression area is located adjacent to the straight area, and a projecting amount of the projection with respect to the straight portion is smaller than a projecting amount of the projection with respect to the depression.

Abstract: A roller member used in an image forming apparatus includes a metallic shaft, and the metallic shaft includes a cylindrical portion formed of a metallic plate, and a projecting portion projecting outward from end surfaces of the cylindrical portion, wherein end portions of the metallic plate each include a straight portion, projections, and depressions, the projections on the one end portion engage the depressions on the other end portion, the depressions on the one end portion engage the projections on the other end portion, and the straight portions on both end portions oppose each other, a straight area is positioned on an end portion of the cylindrical portion, a projection and depression area is located adjacent to the straight area, and a projecting amount of the projection with respect to the straight portion is smaller than a projecting amount of the projection with respect to the depression.

Abstract: A roller member used in an image forming apparatus includes a metallic shaft, and the metallic shaft includes a cylindrical portion formed of a metallic plate, and a projecting portion projecting outward from end surfaces of the cylindrical portion, wherein end portions of the metallic plate each include a straight portion, projections, and depressions, the projections on the one end portion engage the depressions on the other end portion, the depressions on the one end portion engage the projections on the other end portion, and the straight portions on both end portions oppose each other, a straight area is positioned on an end portion of the cylindrical portion, a projection and depression area is located adjacent to the straight area, and a projecting amount of the projection with respect to the straight portion is smaller than a projecting amount of the projection with respect to the depression.

Abstract: A roller member used in an image forming apparatus includes a metallic shaft. The metallic shaft includes a cylindrical portion formed so that one end portion and an other end portion of the metallic plate oppose each other and a projecting portion projecting from an end surface of the cylindrical portion outward in an axial direction of the metallic shaft. The projecting portion includes an end surface located at an end of the projecting portion in the axial direction and an inclined surface configured to connect the end surface of the projecting portion and the end surface of the cylindrical portion. The inclined surface is inclined with respect to the axial direction of the metallic shaft by extending outward from the end surface of the projecting portion in a circumference direction of the cylindrical portion.

Abstract: A roller member used in an image forming apparatus includes a metallic shaft. The metallic shaft includes a cylindrical portion formed so that one end portion and an other end portion of the metallic plate oppose each other and a projecting portion projecting from an end surface of the cylindrical portion outward in an axial direction of the metallic shaft. The projecting portion includes an end surface located at an end of the projecting portion in the axial direction and an inclined surface configured to connect the end surface of the projecting portion and the end surface of the cylindrical portion. The inclined surface is inclined with respect to the axial direction of the metallic shaft by extending outward from the end surface of the projecting portion in a circumference direction of the cylindrical portion.

Abstract: A roller member used in an image forming apparatus includes a metallic shaft, and the metallic shaft includes a cylindrical portion formed of a metallic plate, and a projecting portion projecting outward from end surfaces of the cylindrical portion, wherein end portions of the metallic plate each include a straight portion, projections, and depressions, the projections on the one end portion engage the depressions on the other end portion, the depressions on the one end portion engage the projections on the other end portion, and the straight portions on both end portions oppose each other, a straight area is positioned on an end portion of the cylindrical portion, a projection and depression area is located adjacent to the straight area, and a projecting amount of the projection with respect to the straight portion is smaller than a projecting amount of the projection with respect to the depression.