SPEAKER WITH BUILT-IN DIRECT CURRENT MOTOR

• Main Author: CHOI KI JUNG
• Format: Patent
• Language: English
• Published: 05.12.2003
• 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

PROBLEM TO BE SOLVED: To provide a speaker with built-in direct current motor for selectively producing sound and vibration. SOLUTION: The speaker includes: a speaker part having a yoke having a hole, a first magnet mounted on the yoke; an upper plate mounted on the first magnet to form a magnetic gap with the yoke, a vibration plate fixedly mounted on the upper plate, and a voice coil fixed to the vibrating plate and inserted into the magnetic gap; a direct current motor part having a first lower plate coupled to the lower part of the yoke; a flexible circuit with a brush placed on the upper part of the first lower plate, having a hole and transmitting a drive signal, a second magnet attached to the first lower plate, a rotary shaft each end of which is placed in the hole of the yoke and the hole of the flexible circuit, and an eccentric rotor rotatably mounted on the rotary shaft by the drive signal; and a frame for supporting the speaker part and the direct current motor part. COPYRIGHT: (C)2004,JPO