| 摘要 |
PURPOSE:To aim at improvement of shock resistance, compact size, and reduction of noise, by arranging a buffering member between a projecting portion of a gear and a projecting portion of an engagement member, so as to transmit rotational force with the buffering member compressed. CONSTITUTION:A wheel 14 is provided with wheel teeth on an outer circumferential surface thereof, and projecting portions 14b1 and 14b2 are extended toward a central rotary shaft in the same diametrical direction. A rubber cushion 15 is formed with four buffering portions 15a1-15a4. The projecting portion 14b1 is tightly fitted between the buffering portions 15a1 and 15a2, while the projecting portion 14b2 is tightly fitted between the buffering portions 15a3 and 15a4. A projecting portion 16a1 of an engagement member 16 is tightly fitted between the buffering portions 15a1 and 15a4, while a projecting portion 16a2 of the engagement member 16 is tightly fitted between the buffering portions 15a2 and 15a3. The four buffering portions 15a1-15a4 are formed integrally with a thin connecting portion 15b. The engagement member 16 is connected to an end of a rotary shaft 17. |
