Appeal No. 1999-2248
Application No. 08/960,255
portion, said cylindrical portion defining a hole whose inside
diameter is at least as large as an inside diameter of the
center hole of said iron core, and wherein said cylindrical
portion is connected to said iron core by abutting a distal
end of said cylindrical portion opposite said flange portion
to said first surface of said iron core and fixedly securing
said distal end to said first surface by butt connection means
provided at said distal end of said cylindrical portion where
said cylindrical portion abuts said first surface so that an
axial center of said cylindrical portion is substantially
coincident with an axial center of said iron core, and so that
said flange portion extends outwardly in a radial direction;
and
a resinous bobbin for insulating and accommodating a
field coil disposed in a space formed by the first surface of
said iron core and an outer peripheral surface of said plate.
7. A method of assembling a bobbin unit for a brushless
alternator field coil, comprising the steps of:
providing:
a ring-shaped iron core having a thick wall defining a
center hole, said thick wall delimited in an axial direction
of said center hole by a first surface at one end and a second
surface at another end opposite said first surface;
a plate which has a cylindrical portion and a flange
portion, said cylindrical portion defining a hole whose inside
diameter is at least as large as an inside diameter of the
center hole of said iron core, said flange portion extending
outwardly in a radial direction from an end of said
cylindrical portion; and
a resinous bobbin for insulating and accommodating a
field coil;
mounting said bobbin to said plate; and
3
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