Buckle, and seat belt apparatus including this

A buckle comprising:

• a base;
• a tongue insertion hole into which an engagement portion of a tongue is inserted;
• a latch member supported by the base movably between a non-engaged position where the latch member cannot be engaged with the engagement portion of the tongue inserted
• through the tongue insertion hole and an engaged position where the latch member can be engaged with the engagement portion of the tongue inserted through the tongue insertion hole;
• a release operation member that moves the latch member in the engaged position toward the non-engaged position;
• an ejector that is movably provided in the base and that presses the engagement portion of the tongue inserted through the tongue insertion hole in a direction in which the engagement portion separates from the tongue insertion hole;
• and
• an ejector spring that urges the ejector toward the tongue insertion hole, wherein the whole of the ejector spring is provided in a position out of an area of the path of movement of the engagement portion of the tongue inserted through the tongue insertion hole and an imaginary extended area extended from the area of the path of movement of the engagement portion of the tongue in the direction of movement of the engagement portion.