| 摘要 |
PURPOSE:To execute a communication having no hindrance by switching a communication channel to a free channel by executing periodically a carrier sense by a radio receiving means and probing and storing the free channel, and informing a channel to be used to a controller before detachment of the controller from a holder is completed. CONSTITUTION:A holder part for containing a wireless controller 4 is provided in an adaptor 3, and an electric contact C2 for detecting a fact that the contained controller 4 is detached is provided. While the controller 4 is being contained in the holder, the adaptor 3 executes periodically a carrier sense by a receiving circuit 11 and probes a free channel and stores it in a storage means 13, and when detachment of the controller 4 is detected, it is informed to the controller 4 through the contact C2. When it is tried to pick up the controller from the holder, the adaptor informs a useable channel to the controller, therefore, both the own machine and the other machine can secure a satisfactory communication being free from an interference. |
