Elastic short-pin type universal joint

An elastic short-pin type universal joint, comprising:

• a first base having two first lugs;
• a second base having two second lugs, wherein the first base engages the second base with the first lugs between the second lugs;
• a jointer having a first bore, a second bore, a third bore, a fourth bore, and a fifth bore;
• the first bore passing through the jointer, the second bore and the third bore being at opposite sides of the first bore, the fourth bore extending parallel to the first bore, and the fifth bore extending parallel to the second bore, wherein the jointer is received in a space within the first lugs of the first base and the second lugs of the second base;
• a first elastic member received in the first bore of the jointer;
• two second elastic members received in the second bore and the third bore;
• four short pins received in the space within the first lugs of the first base and the second lugs of the second base, two of which are urged by opposite ends of the first elastic member and the other two of which are urged by the second elastic members, whereby the short pins abut against the first lugs of the first base and the second lugs of the second base by the first elastic member and the second elastic members;
• and
• two positioning units received in the fourth bore and the fifth bore and abutting against an interior side of one of the first lugs and an interior side of one of the second lugs.