Motor laminated core, method of manufacturing same, motor and ink jet recording device

摘要

A laminated core of a motor in which vibrations of core plates causing motor noise is restrained at a low cost; a method of manufacturing such a laminated core; a motor having such a laminated core; and an ink-jet recording apparatus having such a motor. In a laminated core (1) of a motor in which a plurality of core pieces (10) are laminated on each other and which has magnetic poles (13) each having a roughed surface of mountain portions (13a) and groove portions (13b) formed alternately in the direction of rotation of the motor, welded portions (31) for firmly fixing the core pieces (10) to each other are provided in the surface of one of the groove portions (13b) formed in the vicinities of the central portion of each magnetic pole (13) in the direction of rotation. Each welded portion (31) is formed continuously in the direction of lamination of the core pieces (10). Each welded portion (31) is formed by welding the surface of the groove portion (13b). By these welded portions (31), the core pieces (10) are firmly fixed to each other in the surface portions of the magnetic pole portions (13).