Patent ID: 6953379

Claim:
A transmission assembly for a doll having a supporting assembly composed of a bottom base provided with bottom supporting poles extending upward from a top face of the bottom base, bottom springs mounted around the bottom supporting poles, top supporting poles sandwiching therebetween a connecting member with the bottom supporting poles, top springs mounted around the top supporting poles, a top base mounted on free ends of the top supporting poles and a casing securely connected to the top base, the transmission assembly comprising: a first driving device including a rotation sleeve adapted to be rotatably received in the top base and a twist driving element connected to the rotation sleeve to drive the rotation sleeve to twist to the right and to the left, wherein the first driving device includes a first sleeve, a rotation seat having the first sleeve mounted on top of the rotation seat, a roller seat having multiple first rollers lengthwise extending from a face of the roller seat and multiple second rollers transversely extending from the face of the roller seat, wherein the first sleeve, the rotation seat and the roller seat are adapted to be received in the top base and the first rollers and the second rollers are freely rotatable relative to the roller seat and the top base; and a second driving device including a first motor, a first gear box operable connected to the first motor via a first transmission element, a first eccentric roller in connection with the first gear box and having an axle extending out of the first eccentric roller to be rotatably received in the rotation sleeve so as to drive the top base and the casing up and down and a second eccentric roller having a first linkage extending out of the second eccentric roller to drive the top base and the casing back and forth.