Kabushiki Kaisha Toshiba

Junji Fujiwara

Takayuki Miyazawa

Makoto Taniguchi

Satoshi Ogawa

Kimiya Sato

Akihiko Konno

Hideki Tsuboi

Kazuhiro Matsuo

Kanya Doi

Kimiya Satoh

An operating mechanism for a circuit breaker including a frame, a spring shaft mounted on the frame and rotatable around a central axis thereof, a spring case having a notch in an outer periphery thereof and rotatable around the central axis, a rotating spring provided in the spring case and having a first end secured to the spring shaft and a second end secured to the spring case, a cam secured to the spring shaft and rotatable along with the spring shaft, and a catch rotatably mounted on the spring case. The catch is at an original position at the notch inside the outer periphery of the spring case by a spring. The operating mechanism further includes a charging device for rotating the spring case to charge the rotating spring and a control lever rotatably mounted on the frame and having an end portion engaged with the cam, the catch and the outer periphery of the spring case for performing closing and opening control of the charging device. The spring shaft is rotated by a driving force of the rotating spring for causing the control lever to perform the closing control of the charging device. The spring case is rotated by the charging device to charge the rotating spring for causing the control lever to perform the opening control of the charging device.

Operating mechanism for circuit breaker

A vacuum circuit breaker including a vacuum interrupter with a fixed electrode and a movable electrode arranged to be moved into contact with or separated from the fixed electrode. The vacuum circuit breaker includes a movable rod mounted on the movable electrode, an operating mechanism unit for generating operating force to perform the opening and closing operation of the vacuum interrupter, a main shaft mounted on the operating mechanism unit and a drive lever rotatably mounted on the operating mechanism unit by the main shaft for transmitting the operating force towards the vacuum interrupter. The vacuum circuit breaker further includes a crank lever rotatably mounted at a working end of the drive lever and a pressurizing unit provided in the drive lever and the crank lever for generating resilient force to resiliently maintain closed condition of the vacuum interrupter. A first end of the crank lever is linked to the movable rod and transmits the operating force to the movable rod and a second end of the crank lever is linked to the pressurizing unit and transmits the resilient force to the movable rod.

Vacuum circuit breaker actuating assembly

Vacuum circuit breaker

Vacuum valve for a vacuum circuit breaker

A vacuum circuit breaker includes a main frame and a vacuum bulb unit supported on the rear side of the main frame. The vacuum bulb unit includes an intermediate support unit disposed at a rear side of the main frame, and a pair of vertically aligned vacuum bulbs supported on the upper and lower sides of the intermediate support unit. Each of the vacuum bulbs have therein a stationary contact and a movable contact which is movably supported by the intermediate support unit. An insulator bracket has one end secured to the rear of the main frame and extends rearward to support the intermediate support unit at the other end. The insulator bracket has a substantially inverted U-shaped cross section. A pair of frame-shaped insulation mounting members are secured to the upper and lower sides of the intermediate support unit. The opening and closing operation of the contacts in the vacuum bulbs are performed by the operation of an operating rod which passes through the inner space of the insulator bracket so as to extend therealong. A link mechanism is supported in the intermediate support unit so as to be operated by the shifting of the insulating operating rod. The link mechanism opens and closes the contacts when operated.

Growing community of inventors

Tokyo, Japan

Junji Fujiwara