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7. MECHANICAL DESCRIPTIONS
S-7200C
66
７-７. Tension release mechanism
(Presser foot is raised using the
knee lifter plate (1))
(Presser foot is raised using the lifting lever)
(Thread trimming signal is input)
1. Knee lifter <1> Presser bar lifter lever [1] Thread trimmer solenoid
2. Knee lifter connecting rod [2] Solenoid lever
3. Knee lifter R [3] Tension release wire
4. Knee lifter complying bar
5. Knee lifter bar
6. Knee lifter lever
7. Knee lifter connecting rod
8. Presser bar lifter lever
9. Tension release plate
10. Tension release stud
11. Tension release pin
12. Tension disc presser
13. Tension disc (Lifts up)
(1) Knee lifter plate
(2) Presser bar lifter lever spring
When the presser foot is lowered, the
presser bar lifter lever spring (2)
causes the tension release plate 9 to
return.
When the thread trimming signal turns off,
parts such as the solenoid lever [2] and the
tension release wire [3] return to their original
positions.
4349M