Invention Grant
US3566535A Look-alive doll pivot joint 失效
LOOK-ALIVE DOLL PIVOT JOINT

Look-alive doll pivot joint
Abstract:
A PIN JOINT FOR AN ARTICULATED TOY TO JOIN TWO BODY MEMBERS, INCLUDING A PIN WITH A SHARPENED TIP RIGIDLY SUPPORTED BY ONE BODY MEMBER, AND A DISC, DEFINING A CONE-SHAPED CAVITY, SUPPORTED BY THE OTHER BODY MEMBER. A TORSION SPRING, CONNECTED TO THE TWO BODY MEMBERS,A SPRING BIASES THE PIN INTO THE CAVITY WITH THE PIN''S TIP IN ENGAGEMENT WITH THE CONE''S VERTEX. THE TORSION SPRING IS USED TO PROVIDE PIVOTAL AND/OR ROTATIONAL RESTORING FORCES TO THE FIRST MEMBER, TO REPOSITIOIN IT IN ITS QUIESCENT POSITION, AFTER ITS POSITION IS DISTURBED BY FORCE APPLIED BY A PLAYING CHILD.
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