| 摘要 |
A cutting head for brush cutter, edge trimmer or similar comprises a passageway ( 112 ) for a cutting string ( 300 ) and at least one fillet ( 120 ) to support the string extending between s string outlet region of the said passageway and peripheral region of the head. According to the invention, the surface of the fillet presents a recessed profile ( 120 a ,120 b) which is substantially complementary to a part of the cross-section of the cutting string ( 300 ), in order to guide the cutting string in this recess when the string flexes in a direction opposite to the rotation of the head to rest against the fillet. Thus the trajectory of the string can be stabilized and its fatigue limited when there are successive impacts against the fillet.
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