Abstract: Provided is a self-resonance tuning piezoelectric energy harvester. The self-resonance tuning piezoelectric energy harvester includes a piezoelectric beam which extends along a horizontal direction, a fixing element which fixes two ends of the piezoelectric beam, and a mass which is connected to the piezoelectric beam movably along the piezoelectric beam, wherein the mass includes a through-hole through which the piezoelectric beam passes, and makes the movement through the through-hole. According to the principle of continuous movement to the resonance position, the mass of the self-resonance tuning piezoelectric energy harvester induces the piezoelectric beam to generate displacement to the maximum and maximize the electricity production capacity of the piezoelectric energy harvester.

Abstract: A cup holder for a vehicle that stably supports a cup stored in a hole of the cup holder regardless of the size of the cup and prevents the beverage from spilling out of the cup with the cup stored in the hole released from the hole or falling on a side. Such cup holder comprises a storage tray, a cup support installed rotatably in one or the other direction in a storage space formed in the storage tray, a flap link making a back-and-forth movement while compressing a link spring, and an auxiliary cup support having a lower end rotating around a hinge axis rotatably coupled to a flap housing and an upper portion drawn into or out of the storage space depending on the amount of the back-and-forth movement of the flap link.

Abstract: A cup holder for a vehicle that stably supports a cup stored in a hole of the cup holder regardless of the size of the cup and prevents the beverage from spilling out of the cup with the cup stored in the hole released from the hole or falling on a side. Such cup holder comprises a storage tray, a cup support installed rotatably in one or the other direction in a storage space formed in the storage tray, a flap link making a back-and-forth movement while compressing a link spring, and an auxiliary cup support having a lower end rotating around a hinge axis rotatably coupled to a flap housing and an upper portion drawn into or out of the storage space depending on the amount of the back-and-forth movement of the flap link.

Abstract: Provided is a self-resonance tuning piezoelectric energy harvester. The self-resonance tuning piezoelectric energy harvester includes a piezoelectric beam which extends along a horizontal direction, a fixing element which fixes two ends of the piezoelectric beam, and a mass which is connected to the piezoelectric beam movably along the piezoelectric beam, wherein the mass includes a through-hole through which the piezoelectric beam passes, and makes the movement through the through-hole. According to the principle of continuous movement to the resonance position, the mass of the self-resonance tuning piezoelectric energy harvester induces the piezoelectric beam to generate displacement to the maximum and maximize the electricity production capacity of the piezoelectric energy harvester.

Abstract: A wireless recharger for a portable device of a vehicle may include a receiving case on which a wireless recharging device for recharging the portable device is mounted, a support mounted in an interior of the receiving case to be moved in an insertion direction of the portable device by the portable device inserted into the receiving case, and a movement prevention device disposed in the interior of the receiving case to resiliently press against the portable device inserted into the receiving case when the support is moved in the insertion direction of the portable device, for preventing movement of the portable device.