| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to drive a needle bar oscillation mechanism, needle bar shut-off mechanism and tension release mechanism with one common electrically driven actuator, to miniaturize a drive motor by lessening the load at the time of driving of the electrically driven actuator and to consequently reduce the size and cost of a sewing machine. SOLUTION: This sewing machine is provided with a needle bar vertical movement mechanism 2, the needle bar oscillation mechanism 3, the needle bar shut-off mechanism, a thread tension mechanism 5 and the tension release mechanism and is provided with a drive mechanism 7 for driving the needle bar oscillation mechanism 3, the needle bar shut-off mechanism and the tension release mechanism with the driving power of the one common drive motor 90. The drive mechanism 7 is designed to drive a first cam member 93 having a cam for oscillation and a cam for shut-off and a second cam member 95 having a cam for release by the drive motor go and, therefore, the needle bar oscillation mechanism 3, the needle bar shut-off mechanism and the tension release mechanism may be independently drivably driven by the one common drive motor 90.
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