Importance

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Abstract

A stepping motor that facilitates separate winding of annular bobbins of annular stator cores while preventing current-carrying terminals from acting as a bar to the winding work is provided. The stepping motor includes first and second annular stator cores (4, 5) having respective annular bobbins (42, 52) wound with first and second exciting coils (41, 51) around winding sections (45, 55), respectively, and a rotor (3) having a rotation shaft (32) within a concentrical lamination structure of the first and second stator cores (4). A first current-carrying terminal (8) having a first connector section (81) and a second connector section (82) conductively secured to a termination end (41a) of the first exciting coil so as not to obstruct the outer periphery of the winding section (45) is secured to the annular bobbin (42). A second current-carrying terminal (9), having a first connector section (91) for fixation and electrical connection of a termination end (51a) of the second exciting coil (51) while preventing obstruction of the outer periphery of the winding section (55), and a second connector section (92) electrically connected to a circuit board placed in the axial direction of the rotor (3), is secured to the annular bobbin (52). A third current-carrying terminal (10), having a first connector section (101) electrically connected to the second connector section (83) of the first current-carrying terminal (8) and a second connector section (102) electrically connected to the circuit board (2), is also secured to annular bobbin (52).

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First Claim