| 摘要 |
<p>A tuning apparatus includes a dial plate marked with broadcast frequencies thereon; guide shafts provided in parallel with the dial plate; a plurality of markers slidably mounted on the dial plate, with each marker representing a preset position and formed with a first engaging portion; a slidable mount member formed with leg portions slidably fitted on the guide shafts, a dial pointer extending from the leg portions to the dial plate to indicate a selected broadcast frequency and catchers or sleeves rotatably mounted on the guide shafts and formed with a second engaging portion, whereby the slidable mount member is driven by a tuning knob such that the first and second engaging portions are brought into engagement with each other in response to the rotation of the guide shafts during the preset mode of operation of the tuning apparatus.</p> |
