Open-close type earphone structure

An open-close type earphone structure, comprising:

• a headwear rack;
• a pair of ear cover sets respectively disposed on two opposite ends of the headwear rack, each of the ear cover sets comprising:
• a first earphone body having a first side and a second side, the second side being correspondingly disposed to the headwear rack;
• a second earphone body having a third side and a fourth side, the third side being correspondingly disposed to the headwear rack and opposingly connected to and assembled with the second side, the fourth side being provided with an ear cover;
• an external frame having a first surface and a second surface, wherein the second surface is correspondingly provided on the first side;
• a shell correspondingly covering the first surface, the shell and the first surface collectively defining an accommodation space therebetween for disposing a speaker unit;
• a positioning module correspondingly disposed to the ear cover sets, the positioning module having at least one connection unit and at least one positioning unit, so as to enable the shell and the external frame to be opened and closed with respect to the first earphone body via the connection unit and the positioning unit;
• wherein the connection unit further comprises an engagement member and a sliding member, the engagement member is correspondingly disposed on an inner side of the shell, and the sliding member is correspondingly and penetratingly disposed through the first earphone body and engaged with the engagement member;
• wherein the sliding member further has an abutting end and a sliding end formed thereon, an elastic member is provided at the abutting end for correspondingly abutting against a fixing plate, and a front end of the sliding end has at least one gap formed thereon to be correspondingly engaged with a protrusion bar of the engagement member.