| 摘要 |
Seven or some other number of individually operable push buttons are provided for selection of an OFF function and other control functions of an automotive heating, ventilating and air conditioning system. Each push button has a carriage member fitted on one side with an individual contactor and a contactor biasing spring affording contact pressure between the contactor and fixed contact members. Each carriage member is fitted on the opposite side with an individual silicone rubber or other soft resilient valve member having a slidable sealing engagement with a port member in which ports are provided whereby the valve members are adapted to carry out vacuum or other fluid valving functions. Each valve member is fixedly mounted on the corresponding carriage member. Each contactor spring performs the additional function of producing sealing pressure between the corresponding valve member and the port member.
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