Rebounding pivot module

A rebounding pivot module, comprising a bouncing device set, said bouncing device set comprising:

• a barrel having one end thereof tooth shaped;
• a connecting tube fixedly mounted in an opposite end of said barrel, said connecting tube comprising a plug hole in each of two opposite ends thereof;
• a connection rod accommodated in one end of said barrel, said connection rod having one end thereof plugged into one said plug hole of said connecting tube and an opposite end thereof suspending outside said connecting tube, said connecting rod comprising a flange extended around the periphery of the said one end thereof;
• a socket attached onto the opposite end of said connection rod, said socket having one end thereof abutted against said flange of said connection rod and an opposite end tooth shaped, said socket comprising a plurality of engagement grooves defined in the tooth shaped opposite end thereof;
• a first guide block attached onto the opposite end of said connection rod to accommodate said socket therein, said first guide block having one end thereof tooth shaped and aimed at the tooth shaped one end of said barrel and an opposite end thereof beveled;
• a bouncing barrel having an opening defined in one end thereof and a through hole defined in an opposite end thereof for the passing of the opposite end of said connection rod;
• an elastic member inserted through said opening into the inside of said bouncing barrel;
• a second guide block inserted through said opening into the inside of said bouncing barrel and linked with said elastic member, said second guide block comprising a guide hole for the passing of the opposite end of said connection rod, a tooth shaped one end facing toward the beveled opposite end of said first guide block and a plurality of guide edges defined in the tooth shaped one end thereof around said guide hole;
• and
• a lock device mounted onto the opposite end of said connection rod to lock said bouncing barrel to said connection rod.