Gear assembly for transporting a rotation force of a motor shaft to a lead screw

A gear assembly for transporting a rotation force of a shaft of a motor to a lead screw, said gear assembly comprising:

• an eccentric member having a first cylindrical portion with a first center axis in accordance with a center axis of said eccentric member for receiving said shaft on a front side thereof fronting said motor, and a second cylindrical portion with a second center axis on a back side thereof, said second center axis being eccentrically disposed with said first center axis;
• a pinion gear equipped with a radial ball bearing in its center, having a first hole, a second hole opposing said first hole, a first number of teeth and a first diameter, said first and second holes being parallel with a center line thereof and said radial ball bearing being inserted into said second cylindrical portion;
• a stopper on said second cylindrical poriton for preventing said second cylindrical portion from separating from said radial ball bearing;
• a transmitting member having a first and a second protrusions respectively being inserted into said first and second holes of said pinion gear on a front side, and having a groove for receiving said lead screw on a back side, for extracting and transmitting a reduced speed to said lead screw;
• and
• a pinion engagement support portion including a base for supporting said motor, a first wall portion having a hole for receiving said shaft, a second wall portion having an internal gear for accommodating and meshing with said pinion gear and a third wall portion having a hole for receiving an end portion of said lead screw, said internal gear having a second number of teeth and a second diameter larger than said first diameter and said first, second and third wall portions being formed on said base.