| 摘要 |
PURPOSE:To tune a channel smoothly with a soft touch operation of a push button, by performing automatically the pressing-in operation of a steel crossarm in a push-button tuner by a motor driving force. CONSTITUTION:When one of lockout switches, for example, a switch 1a is depressed, its lock piece 2 is pressed in, and a switch plate 11 is pressed through a locking part body 9 to turn on plunger switches 16 and 29, and electric power is supplied to a solenoid plunger 13. This plunger attracts a detaining piece 14, and a switching plate 10 is turned clockwise to turn on a motor switch 30, and a motor 15 is turned. Then, a rack part 4 is moved in the direction of an arrow A through gears 19, 17, and 10, and a steel crossarm 3 corresponding to the selecting push button 1a is pressed in. When the channel tuning state is set, respective operating members are disengaged from one another to stop the rotation of the motor 15. |
