Button lock

A button lock mountable on a door surface and comprising:

• a plurality of button bodies (54);
• cover buttons (10′) covering the button bodies;
• said cover buttons (10′) being exposed on a cover plate (9′) of a case frame (2′) mountable on the door surface housing said button bodies;
• said button bodies being settable in an arrangement in accordance with a keyword for unlocking a dead bolt of a deadlock and disengageably engaged with a key plate (40) which is slidable in the case frame;
• a handle cooperatingly engaged with the case frame and a backing plate and being engaged via a square mandrel with said deadlock;
• wherein each of said button bodies is bar-shaped and includes integral upper and lower stopper flanges (60, 60′);
• wherein the key plate (40) includes a predetermined number of slide notches (37), the button bodies being releasably inserted therein, the slide notches being formed in predetermined positions in the key plate, the key plate being slidably laminated onto a button presser plate (36) within said case frame;
• each of said button bodies loosely inserted in the slide notch of the key plate being slidable to advance or retreat orthogonally in the case frame;
• a screwdriver notch (56) being formed in a tip end of each of the button bodies for determining a selective attitude of the button bodies between one turned attitude in which button bodies intersect the key plate to inhibit the key plate from advancing or retreating and another turned attitude in which the key plate is permitted to advance or retreat,
• each of the button bodies being releasably engaged with a button reset plate (43);
• the handle engaged with said deadlock being engaged via a rotary cam (47) with the key plate and the reset plate;
• a fixing screw (85′) being provided for selectively fixing the handle relative to a rotation shaft of the rotary cam for right-handed or left-handed operation;
• and
• a clear lock button of the key plate being provided on the cover plate of said case frame.