A switching apparatus comprising: a handle shaft coupled to a handle and arranged rotatable in a circumferential direction in response to an operation to the handle; and a locking plate arranged movable in a first direction in association with a rotation of the handle shaft, wherein the handle shaft and the locking plate are operable to limit the rotation of the handle shaft, when the handle shaft arrives at an off position of the switching apparatus, characterized in that the handle shaft includes a first pin (4 1), and the locking plate includes a first slot (6 1), and wherein the first pin (4 1) is received by the first slot (6 1) when the handle shaft arrives at the off position to prevent a further rotation of the first pin (4 1) in a positive circumferential direction (C+), the switching apparatus further comprising: an output axis coaxially arranged with the handle shaft; a slider coupled to the output axis and arranged movable in the first direction in association with a rotation of the output axis; and a torsion spring adapted to apply a force to the locking plate, the torsion spring having a first end coupled to the locking plate and a second end coupled to the slider, wherein the slider includes a slot (8 1) having a bottom portion and a top portion, and the second end of the torsion spring is coupled to the slider via the slot (8 1), wherein the second end of the torsion spring is coupled to the top portion of the slot (8 1) when the first pin (4 1) is received by the first slot (6 1) to cause the torsion spring to apply a force to the locking plate in a direction away from the output axis, wherein the locking plate includes a second slot (6 2) arranged to receive the first pin (4 1) in the circumferential direction, and wherein the torsion spring applies the force to cause the locking plate to move away from the output axis when the first pin (4 1) is released from the first slot (6 1) along a negative circumferential direction (C-), so as to align the first pin (4 1) with the second slot (6 2) in the circumferential direction. a handle shaft coupled to a handle and arranged rotatable in a circumferential direction in response to an operation to the handle; and a locking plate arranged movable in a first direction in association with a rotation of the handle shaft, wherein the handle shaft and the locking plate are operable to limit the rotation of the handle shaft, when the handle shaft arrives at an off position of the switching apparatus, characterized in that the handle shaft includes a first pin (4 1), and the locking plate includes a first slot (6 1), and wherein the first pin (4 1) is received by the first slot (6 1) when the handle shaft arrives at the off position to prevent a further rotation of the first pin (4 1) in a positive circumferential direction (C+), the switching apparatus further comprising: an output axis coaxially arranged with the handle shaft; a slider coupled to the output axis and arranged movable in the first direction in association with a rotation of the output axis; and a torsion spring adapted to apply a force to the locking plate, the torsion spring having a first end coupled to the locking plate and a second end coupled to the slider, wherein the slider includes a slot (8 1) having a bottom portion and a top portion, and the second end of the torsion spring is coupled to the slider via the slot (8 1), wherein the second end of the torsion spring is coupled to the top portion of the slot (8 1) when the first pin (4 1) is received by the first slot (6 1) to cause the torsion spring to apply a force to the locking plate in a direction away from the output axis, wherein the locking plate includes a second slot (6 2) arranged to receive the first pin (4 1) in the circumferential direction, and wherein the torsion spring applies the force to cause the locking plate to move away from the output axis when the first pin (4 1) is released from the first slot (6 1) along a negative circumferential direction (C-), so as to align the first pin (4 1) with the second slot (6 2) in the circumferential direction. an output axis coaxially arranged with the handle shaft; a slider coupled to the output axis and arranged movable in the first direction in association with a rotation of the output axis; and a torsion spring adapted to apply a force to the locking plate, the torsion spring having a first end coupled to the locking plate and a second end coupled to the slider, wherein the slider includes a slot (8 1) having a bottom portion and a top portion, and the second end of the torsion spring is coupled to the slider via the slot (8 1), wherein the second end of the torsion spring is coupled to the top portion of the slot (8 1) when the first pin (4 1) is received by the first slot (6 1) to cause the torsion spring to apply a force to the locking plate in a direction away from the output axis, wherein the locking plate includes a second slot (6 2) arranged to receive the first pin (4 1) in the circumferential direction, and wherein the torsion spring applies the force to cause the locking plate to move away from the output axis when the first pin (4 1) is released from the first slot (6 1) along a negative circumferential direction (C-), so as to align the first pin (4 1) with the second slot (6 2) in the circumferential direction.