Headphone

A headphone, comprising:

• a main body portion, a connection portion, and a curved portion;
• the main body portion comprises a sound emitting section and an extension section, one end of the extension section is connected to the sound emitting section, and the other end of the extension section is curved toward the curved portion and is in transitional connection with the curved portion;
• one end of the sound emitting section is connected to the extension section, and the other end of the sound emitting section is a second free end;
• in a wearing state, the extension section is curved and extended from a front side of an ear, over an upper edge of the ear, to a rear side of the ear, and forms a first contact position with the upper edge of the ear;
• the connection portion is configured to connect the main body portion and the curved portion, and in the wearing state, the connection portion is located between the rear side of the ear and a head, and is curved and extended along the rear side of the ear from top to bottom;
• one end of the curved portion is connected to the connection portion and the other end of the curved portion is a first free end, and in the wearing state, the curved portion is extended downward along a contour of the rear side of the ear, and forms at least one second contact position with the rear side of the ear or the head;
• and
• the first contact position and the second contact position are respectively subjected to mechanical abstraction to obtain a first contact point and a second contact point, and the first contact point and the second contact point are respectively used as mechanical action points of the ear on the first contact position and the second contact position;
• and
• a linear distance between projections of the first contact point and the second contact point on a first reference plane parallel to a sagittal plane of a human body is kept unchanged in the wearing state relative to a natural state.