| 摘要 |
<p>PURPOSE: To reduce the difference of the force necessary for the return to a neutral position of a ratchet from the leftward turn indication position and the rightward turn indication position due to the weight of a direction indication operating lever. CONSTITUTION: The frictional coefficient of the engagement surface 25b of an engagement part 25 as constituted so as to be smaller than the frictional coefficient of the engagement surface 26a of an engagement part 26, and the strength of the engagement for the engagement part 25 of a ratchet 22 for the engagement of a cam projection part 13a by the revolution of a cancellation cam 13 in the opposite direction to the indication direction in the instruction for the leftward turn is set smaller than the strength of the engagement for the engagement part 26 of the ratchet 22 for the engagement of the cam projection part 13a by the revolution of the cancellation cam 13 in the opposite direction to the indication direction, in the instruction of the rightward turn. Accordingly, the return from the leftward turn indication position of a bracket 14 which is carried out according to the weight of a direction indication operating lever 16 can be carried out by the force nearly equal to that of the return from the rightward turn indication position which is carried out against the weight of the direction indication operating lever 16.</p> |
