Earphones

An earphone, comprising:

• a sound generating unit, an abutment unit, and an ear hook, wherein
• the ear hook connects the sound generating unit and the abutment unit;
• in a wearing state, the sound generating unit and the abutment unit form a clamping state on two sides of an auricle, and the sound generating unit is located in a concha cavity;
• the sound generating unit comprises a second housing, a second microphone and a sound generating assembly disposed in the second housing, the sound generating assembly having at least one diaphragm, the sound generating assembly cooperating with the second housing to form a first acoustic cavity and a second acoustic cavity located on two sides of the diaphragm;
• the second housing is provided with a second sound inlet, a sound outlet, and a pressure relief hole;
• the second microphone collects an external sound through the second sound inlet;
• a sound in the first acoustic cavity is transmitted to an ear canal of a user through the sound outlet;
• a sound in the second acoustic cavity is transmitted to an outside of the second housing through the pressure relief hole;
• the ear hook has a symmetry plane along a length direction of the ear hook;
• the ear hook comprises an elastic member and an elastic coating layer covering a periphery of the elastic member;
• at an end of the elastic member close to the sound generating unit, the ear hook further has a third reference plane tangent to the elastic member and perpendicular to the symmetry plane;
• a sound inlet end of the second sound inlet is disposed on one side of the third reference plane, and a sound outlet end of the pressure relief hole is disposed on another side of the third reference plane.