Patent ID: 7573255
Filing Date: 2009-08-11
Classification: B60K,G01D,G01P,H01R,H02K

Abstract:
1. A centerless meter for indicating a position of a graduation portion arranged on a dial associated with a measured value, with a needle extending from an outer side to an inner side of said graduation portion, comprising: a guide groove portion formed in the outer side of said dial and extending along said graduation portion; a mover housed in said guide groove portion so as to be movable along said guide groove portion; said needle attached to said mover; and a moving device for moving said mover relative to said guide groove portion and along said guide groove portion, wherein said moving device includes: a multipolar magnet attached to a first member that is one of said guide groove portion and said mover and having at least one set of N-poles and S-poles arranged adjacent to each other; a coil attached to a second member that is the other of said guide groove portion and said mover for generating magnetic poles at the poles arranged to confront said multipolar magnet; and a power source for switchably energizing said coil such that magnetic poles are generated alternately over successive ones of the poles; and said multipolar magnet or said coil attached to said guide groove portion are arranged in said guide groove portion over a whole moving range in which said mover moves in the guide groove portion.