Abstract: An improved structure for a high efficiency DC motor is disclosed. The DC motor is a motor with built-in field windings, its center shaft is set up in a non-ferromagnetic base which has three equally spaced confinement slots formed around its outer peripheral surface for installing three stacks of laminated silicon steel sheets, a field winding is wound over each laminated silicon steel sheet stack thereby forming a three split phase DC motor. A control unit composed of a commutator assembly and a hollow stationary base is connected in cascade with the motor field so as to drive and control the motor operation. A plurality of motors can be connected in cascade on a common center shaft to form a bulk motor unit operated by one control unit.

Abstract: Disclosed is a retractable toy sword with visual and sound effects having a sword, a retraction driver, and a visual and sound effects driving circuit. The sword is divided into a hilt and a blade. The hilt is a hollow structure, and the blade is composed of at least two blade sections, each having a hollow interior space for holding a spring, and each having an L-like front end, and an L-like rear end for mutual engagement during extension and retraction. The retraction driver is placed within the hilt to control extension and retraction of the blade. The visual and sound effects driving circuit is also located in the hilt. It can generate a variety of noises, such as a collision noise "Dang" and a flying noise "Hee", as well as a directed emission of light by reflection and convergence at a reflective hood and a convergent lens.