User back supporting device for car, has switch connected to box to control on-off connection between power supply and box, and airbag inflated and deflated by control of knobs, where box has control circuit to change modes of airbag

摘要

The device has a functioning unit (1) with an inflate knob, a deflate knob and a mode selection knob and connected to a control box (2) to control function of the box. A power supply (9) is connected to the box by a power supply connector to provide electricity supply to the box. A switch is connected to the box to control on-off connection between the power supply and the box. An airbag (3) is inflated and deflated by control of the inflate and deflate knobs. The box has a control circuit (21) to change functioning modes e.g. movement adjustment and muscle stretching states, of the airbag.