Abstract: For parking a bicycle, a bicycle parking device includes a storage tray, a lifting mechanism, and a rotary platform. The storage tray is located at the bottom of the bicycle parking device and has a plurality of bicycle parking spaces. The lifting mechanism drives a bicycle carrying platform to move up and down. The rotary platform that is rotatably disposed on the lifting mechanism and is docked with the bicycle parking space. The bicycle carrying platform transfers between the bicycle parking space and the rotary platform.

Abstract: For parking a bicycle, a bicycle parking device includes a lower braced frame, a rotating platform, at least one rotating column structure, and a lifting device. The lower supporting frame that installs a rotating platform and supports an upper supporting frame through a bracing rod. The rotating platform is arranged on the lower braced frame and a fan-shaped notch is arranged on the rotating platform. The at least one rotating column structure that supports the lower braced frame, wherein at least one rotating column structure supports the lower braced frame. The lifting device arranged in the rotating column structure is detachably connected to a carrier frame used for carrying bicycles.

Abstract: For parking a bicycle, a bicycle parking device includes a lower braced frame, a rotating platform, at least one rotating column structure, and a lifting device. The lower braced frame that installs a rotating platform and supports an upper supporting frame through a bracing rod. The rotating platform is arranged on the lower braced frame and a fan-shaped notch is arranged on the rotating platform. The at least one rotating column structure that supports the lower braced frame, wherein at least one rotating column structure supports the lower braced frame. The lifting device arranged in the rotating column structure is detachably connected to a carrier frame used for carrying bicycles.

Abstract: For sexing silkworm cocoons, a delivery mechanism carries a checker cocooning frame holding silkworm cocoons. A detection mechanism detects a female silkworm cocoon based on an optical wavelength emitted by the female silkworm cocoon. A sorting mechanism sorts the silkworm cocoons, putting female silkworm cocoons into a female collecting box, and male silkworm cocoons into a male collecting box.