Separate protection component

A separate protection component for protecting an ankle, the separate protection component comprising:

• a first covering body including a first covering surface and a first bottom portion, the first covering surface being connected to the first bottom portion to form a first receiving space;
• and
• a second covering body disposed in the first receiving space, the second covering body including a second covering surface and a second bottom portion, the second covering surface being connected to the second bottom portion to form a second receiving space for receiving the ankle, the second covering surface being connected to the second bottom portion, wherein a sliding surface of the second bottom portions contacts a contact surface of the of the first bottom portion so the sliding surface overlaps the contact surface by a first contact area, the sliding surface forming a maximum static friction coefficient relative to the contact surface;
• wherein, when the first bottom portion is applied with an external force and the external force is not less than the maximum static friction coefficient, the contact surface moves in a direction so that the contact area between the contact surface and the sliding surface is changed from the first contact area to a second contact area.