Patent ID: 9290869
Filing Date: 2016-03-22
CPC Classification: D05B

Claim Text:
1. A sewing machine comprising: a needle bar that is configured such that a sewing needle is attachable thereto; a needle bar up-and-down movement mechanism that is configured to move the needle bar up and down; a swinging mechanism that is configured to swing the needle bar in a left-right direction; a lower shaft that is configured to rotate in synchronization with up-down movement of the needle bar; an outer shuttle that is configured to rotate along with rotation of the lower shaft, the outer shuttle including a hook point, the hook point being configured to catch a loop of an upper thread that is passed through an eye of the sewing needle; a thread cutting mechanism that is configured to cut at least the upper thread; a rotation speed adjustment mechanism that is configured to adjust a rotation speed of the outer shuttle corresponding to a position of the needle bar in the left-right direction; and an actuator that is a driving source of the thread cutting mechanism and the rotation speed adjustment mechanism; wherein: a driving range of the actuator includes a first range and a second range, the actuator being configured to drive the rotation speed adjustment mechanism in the first range, the second range being one of a range that is different from the first range and a range that partially overlaps with the first range, and the actuator being configured to drive the thread cutting mechanism in the second range; and the rotation speed adjustment mechanism includes: