Air supply and exhaust device for air cells

An air supply and exhaust device for air cells, which is configured to supply air to a plurality of air cells and exhaust air from the plurality of air cells via a distributor, the plurality of air cells being inflatable and deflatable, the air supply and exhaust device comprising:

• the distributor including:
• a housing having a plurality of vent holes that respectively communicate with the air cells;
• and
• a valve body configured to be rotatably driven in a state of being arranged to face the vent holes of the housing, configured to supply air from a pump to a vent hole communicating with an air cell to be inflated, and configured to exhaust air from a vent hole communicating with an air cell to be deflated,
• wherein the valve body includes:
• an air supply chamber configured to supply the air from the pump to a vent hole facing the air supply chamber among the plurality of vent holes of the housing;
• and
• an exhaust passage through which an air cell communicating with a vent hole facing the exhaust passage among the plurality of vent holes of the housing communicates with an atmosphere opening port, and
• wherein the exhaust passage has a cross-sectional area substantially the same as a cross-sectional area of the vent hole capable of communicating with the exhaust passage, and allows an exhaust receiving port configured to face the vent hole capable of communicating with the exhaust passage and the atmosphere opening port to communicate with each other by being curved around a rotation center of the valve body and extending in a circular arc shape along a rotation track of the valve body at least at the exhaust receiving port.