Abstract: A main form of stick fuselage of a toy plane has a cruciform cross section. The stick fuselage is formed by plastic material and is integrally formed with a main wing support framing and a tail unit framing. Moreover, a propeller axle bearing, a landing gear framing, a dihedral bracket jointer, a rear rubber hook, and a tail skid may be integrally formed with the main form of stick fuselage.

Abstract: A semi-scale toy plane is disclosed. The fuselage is made of tetrahedral folding plates. Fuselage has a front and a rear parts. The front fuselage is an enhanced straight tube, the rear fuselage is a tetrahedral cone. Front and rear fuselages are joined by joint members. Rear fuselage and tail plane are integrally formed with a crease divided therebetween. Wing is secured to fuselage by engaging buttons to button holes. V-shaped dihedral frames are secured between wing and dihedral holders of fuselage. This invention is capable of finishing assembly in about 10 seconds without requiring a user having any glue, tool, skill or aerodynamics knowledge.

Abstract: A piston air engine comprises an intake system at an outer side of a cylinder and parallel to the cylinder; a piston in the cylinder; a piston inner exhaust valve device in an interior of the piston; and a piston positioning actuating device for actuating an engine and positioning in a power stroke. The lever force apply point of the intake lever is at an upper dead point of the piston to be confined by the movement of the piston; and the lever force accept point of the intake lever is installed at the intake valve door for confining the intake valve.

Abstract: A multi-purpose cap clip, comprising a clip unit, a holding device, and an accessory object. The clip unit has a fixing plate and two clasping plates to two sides of the fixing plate, with the fixing plate and the two clasping plates clasping a brim of a cap. The accessory object has a holding element which fits on the holding device and is held thereby. After assembly of the structural parts, the clip unit fastens the accessory object on the brim of the cap.

Abstract: A multi-purpose cap clip, comprising a clip unit, a holding device, and an accessory object. The clip unit has a fixing plate and two clasping plates to two sides of the fixing plate, with the fixing plate and the two clasping plates clasping a brim of a cap. The accessory object has a holding element which fits on the holding device and is held thereby. After assembly of the structural parts, the clip unit fastens the accessory object on the brim of the cap.

Abstract: A starting device of a toy engine comprises a spring, a starting piece, and a unidirectional bevel gear. The motion of the spring between the two fulcrums serves to ensure that the control rod is kept securely in place at a disengaging position and an engaging position. The unidirectional bevel gear is mounted behind the engine propeller and is controlled by the starting piece to prevent the propeller from turning in reverse at the time when the engine is started. The clutch is formed of two clutch pieces which are mounted between the propeller and the engine head. One of the two clutch pieces is mounted on the front end of the propeller shaft for imparting the engine power. Other one of the two clutch pieces is mounted in front of the propeller. The two clutch pieces are symmetrical in construction to each other and are therefore capable of joining together to enable the propeller shaft to actuate the propeller to turn.

Abstract: An apparatus for dispensing detergent into a toilet cistern includes a container, a membrane, a floating body, and a casing. The membrane has two sides that face an entrance of the container and are connected with the floating body, respectively. The floating body is surrounded by the casing, which in turn is connected to the entrance of the container. The floating body is movable up and down within the casing and moves according to a buoyant force due to the water level in the cistern resulting in a variation of the pressure difference inside and outside the container. Thus a well-defined quantity of cleaning liquid is released from the container, as determined by the movement of the membrane.