Rocking chair

- Nov 26, 2020-

A chair that can be swung back and forth. "After shaking hands with us, he sat on the rocking chair," Han Beiping wrote in his African nightclub

According to a study, the rocking beat at which people are most likely to fall asleep is basically the same as the heart rate, which is 67 beats per minute. It is based on the results of this research and development of the swing bed with the amplitude of about 5 cm swing, gradually decelerate, and finally automatically stop swinging.