| 摘要 |
PURPOSE:To turn an operating dial round in a feeling of regular sequence, by forming the operation side of the operating dial with a semicircular thin platelike part and an arc-shaped dial wall part installed upright along the circumference of this thin platelike part, while installing plural projecting parts arcuately set up in line on a surface at the dial wall part side of the thin platelike part. CONSTITUTION:When a part of a dial wall part 23 is manually operated, an actuating arm 24 of an operating dial 20 also turns round, making an actuating lever 19 turn round, whereby a louver 17 at the rear side turns round, and the direction of a wind is changed. At this time, plural projecting parts 25 installed in a thin platelike part 22 moves in describing arc-shaped path, and an articulating projection 33 installed in the tip of an elastic plate 31 is intermittently pressed in contact with these projecting parts 25 of the thin platelike part 22 one after another. Therefore, the operating dial 20 is rotated by stages with a feeling of regular sequence. This regular sequence sensation is securable when the elastic plate 31 comes into contact with these projecting parts 25 of the thin platelike part 22 under pressure by dint of energizing force of the elastic plate 31 itself, whereby even if there are size errors in the dial 20, there is no fear to be hard to operate or lose the regular sequence sensation. |
