| 摘要 |
This mechanism comprises a fixed contact (3), a mobile contact (4) mounted in a support (5) pivoting on the casing (2), an operating knob (13) actuating a pivoting pawl (16) via a link rod (15), forming a toggle lever system, and a trip element (25) which can be actuated by electromagnetic and/or thermal circuit-breaking means.The pawl is mounted so that it can pivot on the support for the mobile contact about an axle located near the end of this support which is the opposite end to the end equipped with the mobile contact part intended to rest against the fixed contact, and the trip element consists of a part in the overall shape of an L, one of the branches of which is intended to be actuated by the circuit-breaking mechanism and the other branch of which is equipped with a ramp, of which the surface facing the outside of the L is intended to rest under a complementary ramp, that the pawl has, to keep the toggle lever system and thus the support for the mobile contact in a position in which the contacts are closed.
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