Sewing machine having needle bar oscillating mechanism, needle b

Details Sewing machine having needle bar oscillating mechanism, needle b Sewing machine having needle bar oscillating mechanism, needle b

2000-01-18

2000-11-14

Izaguirre, Ismael

Sewing

Stitch forming

Zigzag

112221, D05B 302, D05B 6922

Patent

active

061454575

ABSTRACT:
A sewing machine has a needle bar up/down moving mechanism, a needle bar oscillating mechanism, a needle bar interrupting mechanism, a thread tension adjusting mechanism, and a thread tension releasing mechanism. The sewing machine further includes a driving mechanism that transmits a driving force of an electric motor to the needle bar oscillating mechanism, the needle bar interrupting mechanism and the thread tension releasing mechanism. The driving mechanism comprises a first cam and a second cam which are driven by the electric motor. The first cam has an oscillating cam face that controls the needle bar oscillating mechanism and an interrupting cam face that controls the needle bar interrupting mechanism. The second cam has a releasing cam face that controls a thread tension releasing mechanism. Therefore, the needle bar oscillating mechanism, the needle bar interrupting mechanism and the thread tension releasing mechanism can be driven by a common electric motor.

REFERENCES:
patent: 3433190 (1969-03-01), Sagi
patent: 3872809 (1975-03-01), Adams et al.
patent: 4254721 (1981-03-01), Teetz et al.
patent: 4289086 (1981-09-01), Bolldorf et al.
patent: 4619214 (1986-10-01), Baruffa et al.
patent: 5507239 (1996-04-01), Fujii et al.
patent: 6055920 (2000-05-01), Hori

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