Connection device to which electric device is connected and having dust-proof function

An electric appliance connection device having a dustproofing function, comprising:

• a casing having a setting portion in which an electric appliance having a connection-target terminal is set;
• a connection terminal connected to the connection-target terminal when the electric appliance is set in the setting portion;
• a covering member provided to cover the connection terminal, and capable of moving between a covering position and an exposure position with an operation to set the electric appliance in the setting portion and with an operation to draw off the electric appliance from the setting portion, the covering member covering the connection terminal at the covering position, the covering member exposing the connection terminal at the exposure position;
• a first urging member which applies a fundamental urging force to the covering member between the covering position and the exposure position in a direction from the exposure position toward the covering position;
• and
• a second urging member which applies an additional urging force to the covering member in addition to the fundamental urging force by urging the covering member in an additional urging section provided between the covering position and the exposure position in a direction from the exposure position toward the covering position, and thereby sets the covering member in an additionally urged state, the second urging member releasing the covering member from the additionally urged state in which the covering member is urged by the second urging member when the covering member reaches the end of the additional urging section.