| 摘要 |
PROBLEM TO BE SOLVED: To reduce the number of solenoid valves for a pressure controller for an air massager. SOLUTION: A solenoid cross valve 43 is connected with a compressor 41, and further a sensor 44 is fitted for pressure detection. Solenoid two way valves 46 to 48 are connected in parallel to the ventilation side of the cross valve 43, and cells 49 to 51 expanding and contracting by air pressure are connected respectively to the two way valves 46 to 48. When the cell 49 is expanded, air is supplied from the cross valve 43, the two way valve 46 is opened and the two way valves 47 and 48 are closed while the compressor 41 is being operated. When output from the sensor 44 reaches a pressure value set in advance, the two way valve 46 is closed and the compressor 41 is stopped to keep pressure in the cell 49. Then, a fixed time later, the cross valve 43 is switched to the side of exhaustion and the two way valve 46 is opened to exhaust air in the cell 49. COPYRIGHT: (C)2005,JPO&NCIPI
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