Embolic protection device

An embolic protection device, comprising a frame and a filter screen covering the frame, wherein the embolic protection device further comprises a plurality of supporting rods that are arranged at intervals in an axial direction thereof,

• each supporting rod of the plurality of supporting rods comprises:
• a first tail end, a second tail end, and at least one head end that faces a distal end, the first tail end and the second tail end are separately connected to two opposite sides of the frame;
• a first line segment is formed between the first tail end and the head end;
• and a second line segment is formed between the second tail end and the head end, the first line segment extends in a direction from the first tail end to the head end and gradually moves away from the frame, and the second line segment extends in a direction from the second tail end to the head end and gradually moves away from the frame, such that the plurality of supporting rods support the filter screen, which covers the plurality of supporting rods, in a direction facing away from the frame;
• and
• wherein a sliding-restraint ring is provided on the embolic protection device, both the head end of a distal most supporting rod of the plurality of supporting rods and the sliding-restraint ring protrude from the surface where the frame is located and extend in the distal direction;
• wherein a proximal end of the sliding-restraint ring is disposed at the head end of the distal most supporting rod of the plurality of supporting rods, and a distal end of the sliding restraint ring extends in a distal direction;
• and when a sheath-core is inserted into the sliding-restraint ring and the sheath-core moves distally, the head end of the distal most supporting rod of the plurality of supporting rods is driven to extend distally.