Abstract: A buoyancy-type pillow with a combined action of gas and liquid media is provided. The pillow includes a first pillow body, a second pillow body stacked on a top of the first pillow body, and an interlayer support pad located in an inner cavity of the second bladder. The first pillow body includes a first bladder having a flat shape, the inner cavity of the first bladder is filled with gas medium, and the first bladder is provided with a gas volume adjustment interface. The second pillow body includes a second bladder having a flat shape, the inner cavity of the second bladder is filled with liquid medium, and the second bladder is provided with a liquid volume adjustment interface. The interlayer support pad has a porous structure that allows the liquid medium to flow through. The disclosure achieves an all-around buoyancy support effect.

Abstract: A back-following support device, a control method for preventing sedentariness, and a chair are provided. The back-following support device including: a backrest plate; a flexible back and waist support, including a cushion airbag disposed over the backrest plate; and a control system, including a controller, an air supply device for inflating the cushion airbag, a pressure-regulating valve for controlling the amount of air in the cushion airbag, and an air pressure sensor for detecting air pressure inside the cushion airbag; the air supply device, the pressure-regulating valve, and the air pressure sensor are all connected to the controller. The seat and the back-following support device can be adjusted to make the chair more comfortable, thereby effectively supporting the user's waist and/or back and meeting requirements of different people.

Abstract: A smart mattress, including a mattress body (1), and further including an airbag assembly (2) disposed on a supporting surface of the mattress body (1). The airbag assembly (2) includes multiple airbags respectively used to support multiple parts of the human body, the height of each of the airbags is adjustable. The present smart mattress has a sleep aid function; the air volumes of corresponding airbags in the airbag assembly (2) can be controlled according to a user's experience, so that the heights of the corresponding airbags are flexibly adjusted to achieve the purpose of floating support of different parts of the human body, and the supporting heights of parts of the mattress are alternately and gently changed to achieve the function of relaxing and massage before sleeping. The smart mattress further has a wake-up function and portability; the mattress body (1) can be folded for carrying with one.