Patent ID: 7347152

Claim:
A sewing machine comprising: a main frame including a needle seat, a beam, and a head supported by the beam, with the head and the needle seat having a spacing therebetween, with the head being rotatable relative to the beam, and with the head including means for sewing operation in association with the needle seat; a fixed seat fixed to the beam, with the fixed seat including a first axial hole; and a rotational seat fixed to the head to turn therewith, with the rotational seat including a second axial hole aligned with the first axial hole of the fixed seat, with the rotational seat including a shaft sleeve rotatably extending through the first axial hole of the fixed seat, with the second axial hole and the shaft sleeve of the rotational seat being adapted to be extended through by a rotational shaft coupled to the head for the sewing operation, with the head and the rotational seat being movable relative to the fixed seat between an operative position allowing sewing operation and an inoperative position angularly spaced from the operative position, with the beam including a front beam and a rear beam, with the fixed seat and the rotational seat being mounted between the front and rear beams, with the fixed seat being fixed to the rear beam, with the rotational seat being mounted to an end of the front beam, and with the head being mounted to another end of the front beam.