VIBRATION-GENERATING DEVICE AND ELECTRONIC APPARATUS USING THE SAME

• Main Authors: AZUMA, HIROSHI, KAYAMA, SHUN, SHIMIZU, YUKIKO, KITAMURA, HIROKAZU, YAMASUE, TOSHINORI
• Format: Patent
• Language: English; French; German
• Published: 25.04.2007
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; FOR PERFORMING MECHANICAL WORK IN GENERAL; GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL; GENERATION; METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICALVIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY; PERFORMING OPERATIONS; TELEPHONIC COMMUNICATION; TRANSPORTING

The present invention is directed to a vibration generating device used for mobile telephone, etc., which comprises a rotor (110), and a stator (120) for rotatably supporting the rotor, and serving to rotate the rotor to thereby generate vibration. The rotor comprises a bearing sleeve (160) consisting of resin molded material and rotatably attached to a fixed shaft (124) provided at the stator, a magnet (170) and a weight (180) positioned in eccentric state with respect to the bearing sleeve, wherein the bearing sleeve and the magnet are formed in the state where they are integrated by material resin of the bearing sleeve. The stator comprises, in addition to the fixed shaft, a bottom plate (121), a cover plate (122) and a coil (140) disposed in a manner opposite to the magnet, whereby the coil is energized so that the rotor is rotated, and the bearing sleeve is rotated in the state in contact with the bottom plate or the cover plate by attractive force exerted between the magnet and the bottom plate or the cover plate.