Patent ID: 6883542

Claim:
A coupler, in a compressor including a pressure regulator for regulating compressed air at a high pressure stored to an air tank to an arbitrary pressure to supply, for connecting the compressed air regulated by the pressure regulator to respective exclusive tools by way of a high pressure exclusive plug and a normal pressure exclusive plug, comprising: a socket portion formed at one end of the coupler and capable of mounting either of the high pressure exclusive plug and the normal pressure exclusive plug; an opening/closing valve for opening and closing a flow path of the compressed air supplied to an upstream side of the socket portion via the pressure regulator; an operating member, operatable according to an air pressure value of the compressed air supplied from the upstream side of the socket portion; and a rod operated by mounting the high pressure exclusive plug to the socket portion, for contacting with and pushing the opening/closing valve, wherein the opening/closing valve is opened and closed according to the operation of the operating member, when the normal pressure exclusive plug is mounted to the socket portion, and the opening/closing valve is maintained at an opening position pushed by the rod, when the high pressure exclusive plug is mounted to the socket portion.