Vibration motor having through hole formed in rotor

A vibration motor having a through hole formed in a rotor, the vibration motor comprising:

• a motor housing (110);
• a vibrating part (120) coupled to opposite inner sides of the motor housing (110) and providing vibration while rotating the rotor (130) in forward and reverse directions;
• the rotor (130) having a predetermined length, having the through hole formed therein, and coupled to an inner central portion of the motor housing (110);
• a nozzle (140) detachably coupled to a front side of the rotor (130);
• a coupling part (150) fixing the rotor (130) to the nozzle (140);
• bearings (160 and 160′) coupled to the rotor (130) inside the motor housing (110) and guiding rotation of the rotor (130);
• and
• front and rear covers (170 and 170′) coupled to front and rear sides of the motor housing (110),
• wherein the motor housing (110) comprises:
• a body portion (111);
• a mounting hole (112) formed through an inner central portion of the body portion (111);
• a coupling space (113) formed at each of opposite sides of an inside of the body portion (111) around the mounting hole (112) to allow the vibrating part 120 to be coupled thereto;
• and
• a coupling hole (114) formed at each of upper and lower portions of a rear end of the body portion (111) to allow the rear cover (170′) to be coupled thereto.