Abstract: A focusing mechanism for LED spot lamp includes a lamp seat and a lens barrel being extendably assembled to the lamp seat. The lamp seat has an LED chip mounted thereon. The lens barrel includes a barrel body having a bottom portion and an opposing top portion, and a lens mounted to the top portion. The bottom portion of the lens barrel is assembled to the lamp seat via an extension coupling structure, such that the lens is located above the LED chip to cover the same. With the extension coupling structure, the lens barrel can be adjusted in position to project from the top of the lamp seat by different distances, so that the focal length between the lens and the LED chip can be regulated to accordingly regulate the focusing and diffusing effects of light emitted from the LED chip.

Abstract: A focusing mechanism for LED spot lamp includes a lamp seat and a lens barrel being extendably assembled to the lamp seat. The lamp seat has an LED chip mounted thereon. The lens barrel includes a barrel body having a bottom portion and an opposing top portion, and a lens mounted to the top portion. The bottom portion of the lens barrel is assembled to the lamp seat via an extension coupling structure, such that the lens is located above the LED chip to cover the same. With the extension coupling structure, the lens barrel can be adjusted in position to project from the top of the lamp seat by different distances, so that the focal length between the lens and the LED chip can be regulated to accordingly regulate the focusing and diffusing effects of light emitted from the LED chip.

Abstract: A sectional LED lamp includes a base portion, a lamp portion, and a connecting unit. The base portion includes a base body having an LED driving unit provided therein. The lamp portion includes a lamp body detachably connected at an end to the base body, a lampshade fitted around the lamp body, and at least one LED chip arranged in the lampshade and electrically connected to the lamp body. The connecting unit is located between two adjacent ends of the base body and the lamp body for electrically connecting the LED driving unit to the LED chip and detachably connecting the base portion to the lamp portion. A space is maintained between the base portion and the lampshade, allowing heat generated by the LED chip to quickly dissipate via the space into surround environment.

Abstract: A sectional LED lamp includes a base portion, a lamp portion, and a connecting unit. The base portion includes a base body having an LED driving unit provided therein. The lamp portion includes a lamp body detachably connected at an end to the base body, a lampshade fitted around the lamp body, and at least one LED chip arranged in the lampshade and electrically connected to the lamp body. The connecting unit is located between two adjacent ends of the base body and the lamp body for electrically connecting the LED driving unit to the LED chip and detachably connecting the base portion to the lamp portion. A space is maintained between the base portion and the lampshade, allowing heat generated by the LED chip to quickly dissipate via the space into surround environment.

Abstract: A mechanical disk brake for a bicycle is characterized in a thrust bearing included in a cam mechanism thereof to overcome the problem of a locked disk brake due to an overly large friction as frequently occurs in conventional mechanical disk brakes, and an eccentric force-application arm with an improved geometrical shape to create different arms of force that enables production of an enhanced tail braking force for the mechanical disk brake. The problem of largely reduced braking force occurs in conventional rim brakes in bad weather or in braking over a prolonged time, and the problem of self-locking frequently occurs in the conventional mechanical disk brakes.

Abstract: A mechanical type disc brake for bicycle mainly includes a housing, a mounting bracket for connecting the housing to a fork of the bicycle, a pull bar pivotally connected to an outer side of the housing, an actuating rod extended into the housing via the pull bar, and a toggle mechanism, two sliders, two brake linings, and a restoring element separately mounted in a locating space in the house at predetermined positions. When the pull bar is pulled, the actuating rod is caused to vertically act on the toggle mechanism for two actuating blocks thereof to move outward and push the sliders and the brake linings to create a brake effect. Contact surfaces between the actuating blocks of the toggle mechanism and the sliders are cambered surfaces to avoid an overly large frictional force between the brake linings and brake discs that would result in a brake dragging.

Abstract: A mechanical disk brake for a bicycle is characterized in a thrust bearing included in a cam mechanism thereof to overcome the problem of a locked disk brake due to an overly large friction as frequently occurred in conventional mechanical disk brakes, and an eccentric force-application arm with an improved geometrical shape to create different arms of force that enables production of an enhanced tail braking force for the mechanical disk brake. The fetal problem of largely reduced braking force occurred in conventional rim brakes in bad weather or in braking over a prolonged time, and the problem of self-locking frequently occurred in the conventional mechanical disk brakes are therefore effectively improved.