Protective element

A protective element comprising:

• a fuse element;
• an insulating case configured to accommodate the fuse element;
• a first terminal and a second terminal;
• an insulating member disposed close to or in contact with the fuse element and having an opening portion or a separation portion formed therein;
• a shielding member disposed above the fuse element and configured to move downward while being inserted into the opening portion or the separation portion of the insulating member to divide the fuse element;
• a pressing unit configured to press the shielding member downward;
• a locking member configured to restrain downward movement of the shielding member;
• a heat generating body configured to heat and soften the locking member or a fixing member which fixes the locking member;
• and
• a power supply member configured to supply a current to the heat generating body, wherein:
• the fuse element has a first end portion and a second end portion disposed at both end portions in an energizing direction, one end portion of the first terminal being connected to the first end portion and another end portion of the first terminal is exposed to an outside from the insulating case, and one end portion of the second terminal being connected to the second end portion and another end portion of the second terminal is exposed to the outside from the insulating case;
• the shielding member has a convex portion that protrudes toward the opening portion or the separation portion of the insulating member and the fuse element;
• the convex portion has a tip end which is disposed at a lower end portion of the convex portion and extends in a width direction;
• the tip end has a first inclined blade which extends downward as nearing one side in the width direction;
• the first inclined blade overlaps a region which exceeds at least half of an entire length of the fuse element in the width direction when seen in an up-down direction;
• and
• as the shielding member moves downward, at least a part of the locking member is inserted into the opening portion or the separation portion together with the convex portion.