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US 6,580,345 B2Granted
Switching device
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsHiroyuki Akita, Toyomi Ooshige, Hiroyuki Sasao, Kenichi Koyama, Yukimori Kishida, Mitsuru Tsukima, Toshie Takeuchi
Life of this patent
Estimating the term…
Abstract
A switching device includes a movable coil which is reinforced by a stiffener to increase the resistance of the movable coil to bending moments. The stiffener may include a nonmagnetic case which surrounds the movable coil. Alternatively or in addition, it may include a resin or other material encapsulating the movable coil.
Claims17
A switching device comprising:
- a switch having a fixed contact and a movable contact, is movable with respect to the fixed contact, between an open position and a closed position to open and close the switch;
- a movable shaft drivingly connected to the movable contact;
- and
- an operating mechanism drivingly connected to the movable shaft and moving the movable shaft to open and close the switch and including a flat movable coil operatively connected to the movable shaft, a fixed coil opposing the movable coil, and a coil stiffener increasing stiffness of the movable coil against forces in an axial direction of the movable shaft, wherein the coil stiffener comprises a resin molded around the movable coil.
1 more element
A switching device comprising:
- a switch having a fixed contact and a movable contact, movable with respect to the fixed contact, between an open position and a closed position to open and close the switch;
- a movable shaft drivingly connected to the movable contact;
- and
- an operating mechanism drivingly connected to the movable shaft and moving the movable shaft to open and close the switch and including a flat movable coil operatively connected to the movable shaft, a fixed coil opposing the movable coil, and a coil stiffener increasing stiffness of the movable coil against forces in an axial direction of the movable shaft, wherein the coil stiffener comprises varnish applied to the movable coil.
1 more element
A switching device comprising:
- a switch having a fixed contact and a movable contact, movable with respect to the fixed contact, between an open position and a closed position to open and close the switch;
- a movable shaft drivingly connected to the movable contact;
- and
- an operating mechanism drivingly connected to the movable shaft and moving the movable shaft to open and close the switch and including a flat movable coil operatively connected to the movable shaft, a fixed coil opposing the movable coil, and a coil stiffener increasing stiffness of the movable coil against forces in an axial direction of the movable shaft, wherein the coil stiffener comprises a non-magnetic metal case containing the movable coil.
1 more element
Dependencies are inferred from the claim text.