Abstract: A nutriculture device and a stack-type nutriculture pot system for use in the nutriculture device are disclosed. The nutriculture vice includes moving means for periodically moving a plurality of nutriculture pots, each having culture soil for supporting a crop, on a predetermined closed loop type moving track, a spray nozzle installed at a location on the moving track of the nutriculture pots, for supplying a nutrient solution to the nutriculture pot passing through the location, and a nutrient solution recovery channel for recovering the nutrient solution flowing from the nutriculture pot. Since the above-described nutriculture device supplies a nutrient solution to a plurality of nutriculture pots using a single spray nozzle, its construction can be noticeably simplified. Also, since a nutriculture pot moves periodically so that its location in a houseplant changes at any time, an amount of sunshine applied to a crop is uniformly maintained, allowing the crop to grow evenly.

Abstract: The present invention relates to a transmission internally meshing a planetary gear structure; more particularly, to a reducer that makes it possible to maintain the precision and continuity of power transmission reliably and also to be miniaturized, comprising a frame body provided with a toothed gear internally meshed thereto; a first shaft provided with a sun gear; a plurality of planetary gears operably coupled to the sun gear; a number of crank structures mechanically coupled to corresponding planetary gears; a planetary gear structure mechanically coupled to the crank structures and operably engaged with the toothed gear of the frame body; and a second shaft mechanically coupled to the crank structures.

Abstract: The present invention relates to a transmission internally meshing a planetary gear structure; more particularly, to a reducer that makes it possible to maintain the precision and continuity of power transmission reliably and also to be miniaturized, comprising a frame body provided with a toothed gear internally meshed thereto; a first shaft provided with a sun gear; a plurality of planetary gears with operably being coupled to the sun gear; a number of crank structures mechanically coupled to a corresponding planetary gears; a planetary gear structure mechanically coupling to the crank structures and operably engaged with the toothed gear of the frame body; and a second shaft mechanically coupled to the crank structures.