Abstract: A making device of ice balls comprises a refrigeration chamber unit; the refrigeration chamber unit comprises a lower half ball mold body, an upper half ball mold body and a water circulation unit; in addition, a cover plate is arranged above the refrigeration chamber unit, and a water injection hole is arranged on the cover plate; in addition, a plurality of low-temperature condensing tubes are arranged in the lower half ball mold body; in addition, the refrigeration chamber unit further comprises a thermo electric cooler, and a cold end face of the thermo electric cooler is attached to a bottom surface of the lower half ball mold body; the upper half ball mold body is arranged above the lower half ball mold body, a plurality of convection circulation holes are distributed on the upper half ball mold body, and a water inlet hole is arranged in the center of the upper half ball mold body; and the water circulation unit is arranged on the cover plate and comprises a pump, and the pump is respectively connected

Abstract: A circular plastic container locking mechanism includes a barrel body and a barrel cover; when the barrel body is stationary, the gear handle drives the gear to rotate towards a counter-clockwise direction, and with the rotating function of the gear, the rack on the barrel cover and the whole barrel cover are driven to move towards a clockwise direction, ten times the force for locking the barrel body and the barrel cover up and down can be produced with only a small amount of force by utilizing the lever effect of the gear handle and the effect of thread slope movement on the gear to lock the barrel cover and the barrel body; when the gear handle swings towards the clockwise direction, the barrel cover moves towards the counter-clockwise direction, and then the barrel cover is unlocked; and therefore locking and unlocking are very convenient.