Mounting plate structure of a lock

A mounting plate structure of a handle of a lock, comprising:

• a mounting plate having a coupling portion, a hole defined through the coupling portion, at least one limit groove formed radially in the coupling portion and communicating with the hole, the coupling portion having a notch, the notch being a gap formed in one of two sidewalls of the coupling portion, the notch formed adjacent to the at least one limit groove, the coupling portion having a recess located adjacent to and corresponding to the notch, an abutting portion formed at the coupling portion with the recess defining the abutting portion, the abutting portion located corresponding to and impinging the notch, the mounting plate comprising at least one lug, a driving element disposed at one side of the mounting plate with the at least one limit groove, the driving element including an elastic part, the elastic part elastically abutted between the driving element and the at least one lug, and
• a handle having a pivot portion at one end thereof, the pivot portion pivotally connected to a rose and connected to the driving element, an elastic element located in the pivot portion of the handle, the mounting plate engaged with the rose, a transmission assembly extending through the mounting plate and including a brake pad and a drive rod located corresponding to the hole, the elastic element axially contacting against the brake pad through the hole, the brake pad having a brake element located corresponding to the at least one limit groove, the pivot portion connected to the brake element in a rotational direction thereof, the brake pad having at least one first dent and at least one second dent located opposite to the elastic element, the drive rod having an engagement portion that is located corresponding to the at least one first dent and the at least one second dent, when the lock is in a locked status, the drive rod is rotated to engage the engagement portion with the at least one first dent, thereby pushing the brake pad to insert the brake element into the at least one limit groove and partially located corresponding to the abutting portion, when the lock is in an unlocked status, the drive rod is rotated to engage the engagement portion with the at least one second dent, the elastic element pushes the brake pad and the brake element is removed from the at least one limit groove.