| 摘要 |
PURPOSE:To shorten the distance between supporting points without lowering of strength of both levers by providing two engaging pins on the driven lever with the supporting point sandwiched, and disposing an engaging groove capable of engaging with the pins according to the driving position of the driving pin on the driving lever. CONSTITUTION:Engaging pins 15, 16 are projected on a driven lever 12, with a shaft 13 sandwiched, and engaging grooves 17, 18 capable of engaging with the pins are disposed on a driving lever 10. Only when the driving lever 10 is turned between a vent opening position and a heat opening position, the engaging pin 17 engages with the engaging pin 15 to turn the driven lever 12. When the driving lever 10 reaches the heat opening position, the engaging pin 16 is engaged with the engaging groove 18. Further, when the driving lever 10 reaches the heat opening position, the engaging pin 15 is engaged with the engaging groove 17. Accordingly, the distance between supporting points can be shortened without lowering of the strength of the driving lever 10 and the driven lever 12.
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