Operation switch unit, remote operation terminal and operation system

An operation switch unit comprising:

• a direct operation part that has a manually pushing-operable operation switch and an operation shaft connected to said operation switch, and that is adapted to directly pushing-operate said operation switch manually;
• and
• an alternative operation part that is configured and adapted to be linked with said direct operation part and that alternatively operates said operation switch in place of said direct operation part to pushing-operate said operation switch,
• wherein said operation switch is a switch for separating and opening a first contact and a second contact in contact with one another by moving said operation shaft axially by means of a direct pushing-operation of said direct operation part or an alternative operation of said alternative operation part,
• wherein at the time of said direct pushing-operation, said operation switch is directly pushing-operated manually to shift to a first pushing-state and said operation shaft moves axially to separate said first contact and said second contact, and
• wherein at the time of said alternative operation, said operation switch is alternatively operated and pushing-operated to shift to a second pushing-state identical to said first pushing-state at said direct pushing-operation and said operation shaft moves axially to separate said first contact and said second contact.