Internal rocking structure in a puppet eyeball

An internal rocking structure applied in eyeball of a puppet comprising:

• an outer casing, and an inner casing wherein a pattern of an eyeball is printed at where appropriately on the inner casing, and an elastic member, wherein the outer casing is hollowed to contain the inner casing and the elastic member, and the inner casing is connected to a bottom in the outer casing;
• wherein the outer casing in a slightly hollow spherical form comprises a first outer casing and a second outer casing;
• a first space disposed in the first outer casing;
• a second space disposed in the second outer casing;
• and a through hole disposed at a center of a bottom of the second outer casing;
• a first inner casing containing an inner space and an upper recessed loop being disposed appropriately in the inner space;
• a post including a head, a shank extending from a bottom of the head, and an area of the bottom of the head being greater than a sectional area of the shank, wherein the bottom of the post is coupling to the puppet as an integral part of the puppet;
• an elastic member related to a coil comprising a top portion, a connection portion, and a lower portion in different diameters;
• wherein a diameter of the top portion is greater than that of the connection portion;
• and a diameter of the connection portion is greater than that of the lower portion;
• a second inner casing is relatively coupled with the first inner casing;
• and the second casing contains a space and a lower recessed loop being disposed on a top of a circumference of the space in relation to the upper recessed loop;
• and means to producing continuously rocking kinetics for a certain length of time of the first inner casing and the second inner casing through the elastic member by a mild external shaking or squeezing of the puppet.