Abstract: Each of two plug connectors includes a main body configured to retain a plurality of electric wires and a pair of push members protruding from both sides of the main body along a first direction. In connector mating operation, the two plug connectors are respectively inserted into associated receptacle connectors in a state where the two plug connectors are mechanically coupled or bound to a relative positional relationship by a jig in a position where the pair of push members in one of the two plug connectors are displaced from the pair of push members in the other of the two plug connectors along a second direction orthogonal to the first direction.

Abstract: A drive plate having a plate portion and a ring portion is shaped integrally by pressing using dies. The ring gear portion has inner recessed portions positioned on the inner side of a plurality of outer teeth. The inner peripheral surface of each of the inner recessed portions includes an inner bottom surface having a pair of curved corner surfaces, a pair of first side surfaces inclined so as to become closer to each other as the first side surfaces extend from the opening end of the inner recessed portion toward the inner bottom surface, and a pair of second side surfaces formed in a band shape between the corner surfaces and the first side surfaces. The degree of inclination of the second side surfaces with respect to a center line is smaller than the degree of inclination of the first side surfaces with respect to the center line.

Abstract: A drive plate includes a plate section connected to a crankshaft of an engine, and an annular ring gear section that extends in an axial direction from an outer circumference of the plate section and includes external teeth that mesh with a pinion gear of a cell motor for cranking the engine, where the plate section and the ring gear section are integrally formed by press working; each of the inner side recesses is formed on an inner circumferential surface of the ring gear section so as to be located on an inner side of each of the external teeth at least on a play end side of the ring gear section; and each of the external teeth includes a step portion recessed toward the inner side than a tooth tip on the play end side.

Abstract: A drive plate includes a plate section coupled to a crankshaft of an engine and a rim section including a plurality of teeth that meshes with a pinon gear of a cell motor for cranking the engine. The plate section and the rim section are integrally molded by press working the drive plate in an axial direction. A free end on a side opposite to a base end which is connected to the plate section of the rim section is brought closer than the base end to a central axis of the plate section, that is, the drive plate.