Patent ID: 6198821
Filing Date: 2001-03-06
Classification: H01R,H04M,H04R

Abstract:
An adapter for linking an earphone-microphone set to a mobile telephone, wherein the earphone-microphone set includes an earphone, a microphone and a first plug such that the first plug includes a first terminal, a second terminal and a third terminal, one end of the microphone is connected to the first terminal of the first plug while the other end of the microphone is connected to the third terminal of the first plug, and one end of the earphone is connected to the second terminal of the first plug while the other end of the earphone is connected to the third terminal of the first plug, the adapter comprising:a second plug having a first terminal, a second terminal, a third terminal and a fourth terminal for connecting with the mobile telephone;a socket having a first contact point, a second contact point and a third contact point, wherein the second contact point is connected to the second terminal of the second plug, the third contact point is connected to the third terminal of the second plug, and the socket is used for receiving the first plug of the earphone-microphone set such that when the first plug is plugged into the socket, the first contact point of the socket contacts the first terminal of the first plug, the second contact point of the socket contacts the second terminal of the first plug, and the third contact point of the socket contacts the third terminal of the first plug;a muting switch having one end connected to the first terminal of the second plug while the other end is connected to the first contact point of the socket, such that when the earphone-microphone set is connected to the mobile telephone via the adapter, closing the muting switch connects the microphone to the mobile telephone while opening the muting switch cuts off the connection of microphone to the telephone; anda call-receiving switch having one end connected to the third terminal of the second plug while the other end is connected to the fourth terminal of the second plug, such that when the earphone-microphone set is connected to the mobile telephone via the adapter, activating the call-receiving switch briefly enables a user to pick up an incoming call.