| 摘要 |
PURPOSE:To execute easily an adjustment of non-directivity and a characteristic, and to cause no malfunction nor defective operation by providing a spherical frame body, plural electric conductors provided on the inside surface of this frame body, and a liquid-like electric conductor moving on the inside surface of the frame body. CONSTITUTION:An electric conductor 12 and an electric conductor 13 are provided on the inside surface of a spherical frame body 8 formed by a synthetic resin, and these electric conductors 12, 13 are connected to terminals 9, 10 of the outside of the frame body 8. These electric conductors 12, 13 are formed like a wave, also the electric conductor 12 and the electric conductor are placed alternately, and there is a gap so that the electric conductor 12 and the electric conductor 13 contact with each other. Also, mercury 11 of quantity of an extent that it moves on the inside surface of the frame body 8 and contacts simultaneously with the electric conductor 12 and the electric conductor 13 which are provided adjacently is contained in the inside of the frame body 8. When a device is inclined, the mercury 11 moves, the impedance between the terminal 9 and the terminal 10 is varied to short from high, and the movement is detected. Also, when the device moves, the mercury 11 moves, the impedance between the terminal 9 and the terminal 10 is varied to high from short, and the movement is detected. |
