OUTER SHUTTLE OF SEWING MACHINE

摘要

An outer shuttle of a sewing machine, which accommodates an inner shuttle that grabs an upper thread and accommodates a bobbin around which a lower thread is wound, includes: a gear shaft which has a driven gear connected to a driving gear, provided on a lower shaft, which is a driving source of the outer shuttle that is rotatably supported in the sewing machine, and which also has a shaft support hole formed aligned with an axial center of the driven gear; a shuttle body to which the gear shaft is press-fitted and fixed at the center of rotation of a press-fit receiving hole formed in a bottom portion thereof; and a shuttle supporting shaft which is inserted into the shaft support hole of the gear shaft of the shuttle body to support the rotation of the shuttle body.

主权项

1. An outer shuttle of a sewing machine, which accommodates an inner shuttle that grabs an upper thread and accommodates a bobbin around which a lower thread is wound, the outer shuttle comprising:
a gear shaft which has a driven gear connected to a driving gear, provided on a lower shaft, which is a driving source of the outer shuttle that is rotatably supported in the sewing machine, and which also has a shaft support hole formed aligned with an axial center of the driven gear; a shuttle body to which the gear shaft is press-fitted and fixed at the center of rotation of a press-fit receiving hole formed in a bottom portion thereof; and a shuttle supporting shaft which is inserted into the shaft support hole of the gear shaft of the shuttle body to support rotation of the shuttle body, wherein a plurality of ridge-shaped portions is formed on an inner circumference of the shaft support hole so as to correspond to a press-fitting depth of the gear shaft.