Abstract: A housing having an inclined surface and a pair of footrests is provided. A plurality of impact rods are disposed in perpendicular to the inclined surface and axially slidably mounted in the housing. An impact head is secured to a top of each of the impact rods. A reciprocating device is provided for reciprocating the impact rods so as to impact a sole of a user mounted on the footrest. A reciprocating device and a drive motor for actuating the reciprocating device are disposed in a mass block that is suspended from the housing.

Abstract: A hand-held massager having a plurality of attachments; all the attachments being driven by a single drive unit via a rotating cam so that massaging is effected by increasing the massaging range and gently patting the skin surface.

Abstract: A hand-held massager having a plurality of attachments; all the attachments being driven by a single drive unit via a rotating cam so that massaging is effected by increasing the massaging range and gently patting the skin surface.

Abstract: An engine-driven model toy having an engine, an electric motor connected to the engine and a power source battery, and characterized in that the electric motor, powered by the battery, drives the engine at the start of the engine while, during the continuous operation of the engine, the electric motor is driven by the revolution of the engine to charge the battery is disclosed. Also, an engine-driven model toy characterized in that the engine and the electric motor are connected through a transmission mechanism capable of changing over the engine/motor speed ratio at predetermined values in accordance with the starting and continuous operation modes of the engine is disclosed.

Abstract: A model helicopter device wherein a countertorque generated in the helicopter body by changes in the revolution of a main rotor is canceled by substantially detecting the acceleration of the revolution of the main rotor and automatically adjusting the pitch of tail rotor blades in accordance with the detected acceleration.