Abstract: An electrical contactor of this invention includes: a first plunger to contact one member, the first plunger including a tip portion formed into a plurality of chevron shapes; a second plunger to contact a counterpart member, the second plunger working in cooperation with the first plunger to form electrical conduction between the one member and the counterpart member; and a spring part to couple the tip portion of the first plunger and a tip portion of the second plunger while the tip portion of the first plunger and the tip portion of the second plunger are pointed in opposite directions. The spring part covers an outer periphery of a part where the first plunger and the second plunger are coupled and supports the first plunger and the second plunger in a manner that allows the first plunger and the second plunger to slide relative to each other.

Abstract: An electrical contactor of this invention includes: a first plunger to contact one member, the first plunger including a tip portion formed into a plurality of chevron shapes; a second plunger to contact a counterpart member, the second plunger working in cooperation with the first plunger to form electrical conduction between the one member and the counterpart member; and a spring part to couple the tip portion of the first plunger and a tip portion of the second plunger while the tip portion of the first plunger and the tip portion of the second plunger are pointed in opposite directions. The spring part covers an outer periphery of a part where the first plunger and the second plunger are coupled and supports the first plunger and the second plunger in a manner that allows the first plunger and the second plunger to slide relative to each other.

Abstract: An aquarium overflow device capable of simplifying the structure and reducing the cost is provided. The present invention is directed to an aquarium overflow device for supplying the water W in an aquarium to an external device outside the aquarium and for supplying the water W in the external device into the aquarium. The device is equipped with an inverted U-shaped siphon pipe 55 for introducing the water W in the aquarium to an outside of the aquarium, the siphon pipe having an inlet side end portion to be disposed in the aquarium and an outlet side end portion to be disposed outside the aquarium, an inverted U-shaped discharge pipe 56 having an inlet side end portion to be disposed outside the aquarium and an outlet side end portion to be disposed in the aquarium, water conveyance means for discharging water from the external device to introduce the water into the discharge pipe 56, and a connection tube 8 connecting an upper portion of the siphon pipe 55 and an upper portion of the discharge pipe 56.