| 摘要 |
<p>PURPOSE:To permit a back lamp certainly during backward motion, with it prevent from lighting while the backward motion is off operation, by allowing the back lamp to light up when a speed change operating tool does not lie within the forward motion operational range and when a restricting means is in off-restricting condition. CONSTITUTION:A mechanism K to raise a guide pin 23 mates with a off- restriction actuating means, while a knob 28 for backward motion with its operating tool. When a speed change operating tool 11 is in its operating position for forward motion and in the neutral position from speed changing, a restricting plate 24 is capable of off-restricting operation with the aid of the knob 28. This is further equipped with a limit switch 30, which senses that the guide pin 23 lies in the elevated position, i.e. in off-restriction condition, and a rotary switch 31 to sense that the speed change operating tool 11 lies within the forward motion operational range. On the basis of sensing information from the limit switch 30 and rotary switch 31, it is sensed that the speed change operating tool 11 does not lie within the forward motion operational range and that the backward motion knob 28 is pushed, and associated therewith a back lamp 7 is lighted up.</p> |
