| 摘要 |
The present invention provides a protection device comprising a resin base, a first terminal, a PTC element, a bimetal element, an arm, an upper plate, and a second terminal, the protection device being characterized in that: the first terminal, the PTC element, the bimetal element, and the arm are stacked in this order inside an internal space defined by the resin base inner walls, and the internal space containing these is sealed by the upper plate; the upper plate is held by the resin base inner walls; the first terminal, the arm, and the second terminal establish a series electric connection in this order; and when the bimetal element is operated, the first terminal and the arm become electrically cut off while the first terminal, the PTC element, the bimetal element, the arm, and the second terminal establish a series electric connection in this order. This protection device has a large internal space, can be reduced in size, and can be produced readily. |
