ELECTROMAGNETIC VALVE SYSTEM

摘要

Provided is an electromagnetic valve system for carrying out a compressed air supply to and evacuation from a plurality of air chambers of massage instruments of an air-type massage device, comprising: a plurality of first electromagnetic valves which are connected to each air chamber via supply tubes; a second electromagnetic valve further comprising a first aperture which communicates with external air; and a plurality of first check valves which are disposed within a header in an intermediate location between the second electromagnetic valve and each air chamber with a connection tube therebetween, and allow air to pass from the air chambers toward the second electromagnetic valve only when air pressure on the second electromagnetic valve side is lower than air pressure on the air chamber side.

主权项

1. An electromagnetic valve system for supplying and discharging compressed air into and from a plurality of air chambers of a massage device of a pneumatic massage apparatus, the electromagnetic valve system comprising:
a compressed air inlet for receiving compressed air; a plurality of first electromagnetic valves each to be connected to a corresponding one of the air chambers of the massage device, the first electromagnetic valves each having a first opening communicating with the compressed air inlet, a second opening communicating with an outside atmosphere, and a third opening for communicating with an associated one of the air chambers, and the first electromagnetic valves each being switchable between a first position where the second opening is closed and the first opening and the third opening are communicated with each other and a second position where the first opening is closed and the second opening and the third opening are communicated with each other; a second electromagnetic valve having a first opening communicating with the outside atmosphere and a second opening for communicating with the plurality of air chambers, the second electromagnetic valve being switchable between a first position where communication between the first opening and second opening of the second electromagnetic valve is cut off and a second position where the first opening and second opening of the second electromagnetic valve are communicated with each other; and a plurality of first check valves provided, respectively, between the air chambers and the second opening of the second electromagnetic valve, the first check valves allowing air to flow from the air chambers toward the second opening of the second electromagnetic valve only when an air pressure on a second opening side of the second electromagnetic valve is lower than an air pressure on an air chamber side; wherein the first electromagnetic valves are self-holding electromagnetic valves that maintain either the first or second position assumed thereby when a supply voltage to the first electromagnetic valves drops below a given value even after the supply voltage to the first electromagnetic valves has dropped below the given value, and the second electromagnetic valve is an automatic release type electromagnetic valve that switches over to the second position when a supply voltage to the second electromagnetic valve drops below a given value.