Patent ID: 6639333
Filing Date: 2003-10-28
Classification: G03F,H02K

Abstract:
A linear motor, comprising:a magnet; a plurality of coils; and a jacket having a comb-shaped member that extends along a driving direction, wherein a cooling medium flows through an inside space enclosed by said jacket, wherein said comb-shaped member includes base portions provided on inside faces of said jacket and pillar-like portions for connecting said base portions, and wherein at least one of said plurality of coils is supported by said base portions in a floating manner and is fixed, with respect to the driving direction, by being sandwiched by the pillar-like portions, wherein said a plurality of coils are arrayed along the driving direction partially overlapping each other wherein at least one of said coils has a bent end portion to avoid mutual interference of partially overlapped portions of said coils and wherein said coils are disposed with their central portions placed substantially at the same level, and wherein said jacket has a central portion and a recessed portion on the outside of the central portion, wherein the bent end portions of said coils are disposed at the recessed portion, and wherein the recessed portion reinforces the central portion.