Abstract: An ice maker comprising a casing (1), a water storage box (2), and an ice-making mold (3). The water storage box (2) is placed inside the casing (1) and forms a water storage cavity (21). The ice-making mold (3) is provided with an upper through hole (31) and a lower through hole (32). The ice-making mold (3) includes a first pairing part (33) and a second pairing part (34) that pairs with the first pairing part (33). The first pairing part (33) is equipped with a first opening cavity (331), and the second pairing part (34) is equipped with a second opening cavity (341). When the first pairing part (33) and the second pairing part (34) are combined, the first opening cavity (331) and the second opening cavity (341) come together to form an ice-making cavity (35).

Abstract: A projection device includes a light beam generator including an incoherent light source assembly, a reflecting mirror arranged on one side of the light beam generator, an interference structure arranged on a reflecting light path of the reflecting mirror and generating a pattern effect, a first gear structure arranged on an outer side of the interference structure, a convex lens arranged on an exit light path of the interference structure; and a motor. A light beam generated by the light beam generator irradiates on one surface of the reflecting mirror along an incident light path of the reflecting mirror and reflects to a side surface of the interference structure. The light beam passes through the interference structure and the convex lens in sequence to form a patterned projection. A second gear structure engaged with the first gear structure is arranged on an output shaft of the motor.

Abstract: The present disclosure provides a bubble machine, including a film forming nozzle, a film covering body disposed on the film forming nozzle, and fan blades. Airflow generated by rotation of the fan blades flows to the film forming nozzle. The film forming nozzle is driven to swing through a drive mechanism. The drive mechanism includes a dial wheel and a swing rod. A rotating shaft is disposed on a middle of the swing rod. The dial wheel is driven to rotate through a driver. During a rotation process of the dial wheel, a first end of the swing rod swings around the rotating shaft, so that a second end of the swing rod drives the film covering body to swing. The film covering body enables bubble liquid to form a film on the film forming nozzle during a swinging process.