| 摘要 |
PURPOSE:To accurately and smoothly perform channel selection and dial display, by respectively fitting a variable capacitor to a circuit board, a variable capacitor drum to a variable capacitor tuning shaft in inserting the circuit board, and a frame pivoted with a drive shaft and a pulley to the circuit board. CONSTITUTION:A variable capacitor 9 is fitted to the upper surface of a tuner circuit board 13 through a variable capacitor tuning shaft 14, and a variable capacitor drum 10 is pivoted to the lower end of the shaft 14 through clipping the board 13. One side ridge of the board 13 is fitted to a support shelf 19 provided to a frame 18 having a pair of left and right supports 2 and 2'. A dial scale plate 11 is formed at the upper part of the supports 2, 2' of a frame 18, two pulleys 5a, 5b are pivoted at the upper side of the support 2 and one pulley 5c and a tuning drive shaft 4 are pivoted at the upper side of the support 2'. The lower part of the frame 18 between the supports 2 and 2' is provided with an L type support piece 19' pending down and a pulley 5d made orthogonal to the said pulleys is supported at the lower side of the support piece 19'. Further, a dial thread 6 is wound up with the shaft 4, the pulleys 5c, 5a at both ends of the dial scale plate, the pulley 5b, the variable capacitor drum 10 and the pulley 5d. |
