Power switch control apparatus of equipment

A power switch control apparatus of an equipment having:

• a door switch for shutting off a power supply in response to an opening of a door to access an inside of said equipment;
• a relay circuit which is connected serially to said door switch and is used to turn on/off the power supply;
• a main switch that is manually operated in order to turn on the power source to said equipment;
• driving means for driving said relay circuit in response to the operation of said main switch and for turning off the relay circuit in response to the opening of said door;
• and
• detecting means for detecting an abnormality of said equipment,
• wherein said switch control apparatus comprises
• holding means that is connected in parallel with said main switch and holds a state in which the main switch is turned on, and
• control means for setting said holding means into a holding state when the abnormality is detected by said detecting means and for cancelling said holding state after the door was closed from the opening state.

A power switch control apparatus of an equipment, comprising:

• a switch that is manually operated to turn on a power source to said equipment;
• shut-off/conducting means for shutting off or conducting a power supply to the equipment from the power source;
• instructing means for instructing so as to set said shut-off/conducting means into a conductive state in response to that said switch is manually operated;
• holding means for mechanically holding the instructing state of said instructing means;
• detecting means for detecting an abnormality of said equipment;
• and
• control means for setting said holding means into a holding state so that said instructing means instructs the conductive state when the abnormality is detected by said detecting means and for cancelling the holding state of said holding means when said abnormality is cancelled.

A power switch control apparatus of an equipment comprising:

• a door switch for shutting off a power supply in response to an opening of a door to access an inside of said equipment;
• a relay circuit which is connected serially to said door switch and is used to turn on/off the power supply;
• a main switch that is manually operated in order to turn on the power source to said equipment, wherein said main switch is a self-resetting type switch which does not hold the on-state;
• driving means for driving said relay circuit in response to the operation of said main switch and for turning off the relay circuit in response to the opening of said door;
• and
• generating means for generating a same signal to be generated in a state in which said main switch is operated without operating said main switch in response to the door closing after the relay circuit is turned off by the opening of said door,
• wherein said driving means drives the relay circuit in response to the signal from said generating means.