SPEAKER WITH BUILT-IN DIRECT CURRENT MOTOR

• Main Author: CHOI KI JUNG
• Format: Patent
• Language: English
• Published: 27.11.2003
• Edition: 7
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DEAF-AID SETS; DYNAMO-ELECTRIC MACHINES; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; FOR PERFORMING MECHANICAL WORK IN GENERAL; GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL; GENERATION; LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS; METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICALVIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY; PERFORMING OPERATIONS; PUBLIC ADDRESS SYSTEMS; TRANSPORTING

Disclosed is a speaker with a built-in direct current motor for selectively generating sound and vibration, which includes: a speaker part, a direct current motor part, and a frame. The speaker part has a yoke having a hole formed at the center thereof, a first ring-shaped magnet mounted on the top surface of the peripheral portion of the yoke, a ring-shaped upper plate mounted on the top surface of the first magnet, a vibration plate fixedly mounted to the top surface of the upper plate at the circumferential end thereof, and a generally cylindrical voice coil attached to the bottom surface of the vibration plate. The direct current motor part has a lower plate coupled to the bottom surface of the peripheral portion of the yoke, a flexible printed circuit board disposed on the lower plate, a second ring-shaped magnet mounted on the top surface of the lower plate, a rotary shaft positioned one end thereof on the hole of the yoke and positioned the other end thereof on the hole of the center of the flexible printed circuit board, and an eccentric rotor rotatably mounted on the rotary shaft. According to the present invention, sound or/and vibration is/are selectively outputted from portable equipment such as a cellular phone requiring a vibration function.