Clamping mechanism

A clamping mechanism, comprising:

• a base comprising a fixing plate and a guiding rail;
• a clamping block slidably mounted to the guiding rail and opposite to the fixing plate, to clamp an object cooperating with the fixing plate;
• a post connected to the clamping block;
• and
• a locking unit comprising:
• a first stop plate fixed to the base to support the post;
• a self-locking block placed around the post;
• an elastic member sandwiched between the first stop plate and the self-locking block;
• opposite first and second supporting plates fixed to the base;
• an eccentric shaft comprising an eccentric portion, the eccentric shaft pivotally connected between the first and second supporting plates and positioned one side of the self-locking block opposite to the elastic member, and an end of the eccentric shaft extending through the first supporting plate and exposed out of the first supporting plate;
• and
• a locking handle connected to the end of the eccentric shaft exposed out of the first supporting plate;
• wherein when the locking handle is rotated, the eccentric shaft is rotated to allow the eccentric portion to push the self-locking block, the self-locking block is pushed to rotate relative to the post, and self-locking friction is produced between the self-locking block and the post to lock the self-locking block to the post.