A power supply circuit breaker device, comprising:
- a fixed-side connector device provided partway along a power supply circuit;
- and
- a movable-side connector device that engages with or disengages from the fixed-side connector device to turn ON or OFF the power supply circuit,
- wherein the fixed-side connector device includes:
- a first terminal having electrical conductivity, which is connected to one side of a divided portion of the power supply circuit;
- a second terminal having electrical conductivity, which is connected to another side of the divided portion of the power supply circuit;
- and an electrically insulating fixed-side connector housing, which accommodates the first terminal and the second terminal,
- wherein the movable-side connector device includes:
- an electrically insulating movable-side connector housing, which is engaged with the fixed-side connector housing;
- and a third terminal, which is accommodated in the movable-side connector housing and is configured to contact the first terminal and the second terminal to turn ON the power supply circuit,
- wherein the first terminal and the second terminal include:
- a first electric contact portion and a second electric contact portion, each have a tab-shape protruding along an engagement direction of the fixed-side connector device and the movable-side connector device, and are arranged along a direction orthogonal to the engagement direction with a predetermined interval therebetween,
- wherein the fixed-side connector housing includes:
- a fixed-side base portion;
- and a fixed-side cylindrical portion, which is formed in a cylindrical shape so as to surround the first electric contact portion and the second electric contact portion, and
- wherein the movable-side connector housing includes:
- a movable-side base portion;
- and a movable-side cylindrical portion, which is formed in a cylindrical shape so as to surround the third terminal and is engaged with the fixed-side connector housing,
- wherein one of the fixed-side cylindrical portion and the movable-side cylindrical portion includes a boss portion which has a protruding shape, while another one of the fixed-side cylindrical portion and the movable-side cylindrical portion includes a slit-shaped or groove-shaped guide portion which is guided by the boss portion, and
- wherein the guide portion includes:
- a first guide portion, which is formed along the engagement direction from an opening edge of the other one;
- a second guide portion, which is continuous with the first guide portion and formed in a direction around a rotation axis parallel to the engagement direction;
- and a third guide portion, which is continuous with the second guide portion and formed on a side away from the opening edge along the engagement direction.