Door locking handle assembly with built-in combination lock

In a door locking handle assembly with a built-in combination lock (6), the assembly being provided with a base body (1) which is fixedly mounted on a door (30) of a box, wherein a door handle (2) is pivoted to said base body (1) so as to be capable of being pulled out forward and pushed back rearward relative to said base body (1) and also turned sideward on a locking shaft (29) after completion of its pulling-out operation, wherein a locking member (3) serves for locking said door (30) to a main body of said box is directly or indirectly connected with said door handle (2) so as to be engaged with and disengaged from a receiving portion of a stationary frame element when said door handle (2) is pulled out forward and then turned sideward on said locking shaft (29) after completion of the pulling-out operation of said door handle (2), the improvement wherein:

• said combination lock (6), which is provided with a plurality of marked dial discs (4), is incorporated in said door handle (2) and opened by turning each of said marked dial discs (4) a given number of times to establish a predetermined combination of marks provided in outer peripheral surfaces of said dials discs (4);
• said plurality of dial discs (4) being provided in an alternating relationship with an equal number of adjacent cam discs (41), said dial discs (4) and said cam discs (41) being each rotatably mounted on an elongated center pin (20), wherein said marked dial discs (4) can be interlocked to each adjacent said cam disc (41) by a plurality of positioning projections (45) which are inserted axially into a mating positioning groove (46);
• said combination lock (6) is held in its locked condition when said predetermined combination of marks of said dial discs (4) is not established;
• a cylinder lock (13) is incorporated in said door handle (2) and disposed adjacent to said combination lock (6) in a longitudinal direction of said door handle (2), wherein said cylinder lock (13) is provided with a rotor (8);
• when a key (7) is inserted into a keyhole (9) of said rotor (8) of said cylinder lock (13), said cylinder lock (13) has its internal lock mechanism (10) unlocked to permit said rotor (8) to be turned by said key (7) thus inserted into said keyhole (9) of said rotor (8);
• so that when said rotor (8) is turned, a stopping plate (11) which is slidably received in a side through-hole (12) of said door handle (2) is driven in a manner such that said stopping plate (11) is projected outward from said side through-hole (12) and retracted from the outside of said door handle (2);
• said stopping plate (11) has its upper end portion (14) abut against a shoulder portion (15) of a lower surface of a proximal end portion of a pivoted receiver lever (16);
• said shoulder portion (15) of said receiver lever (16) is provided with a cam slope (18) through which said receiver lever (16) is pushed upward by said upper end portion of said stopping plate (11);
• said receiver lever (16) is rotatably urged toward said stopping plate (11) by means of a first spring member (19);
• a slider (21) is disposed in parallel with said center pin (20) of said combination lock (6), and urged toward said cylinder lock (13) by means of a second spring member (22) in a manner such that a lower end portion (23) of said slider (21) abuts against an upper surface of said receiver lever (16), so that said slider (21) has its restriction portion (26) engaged with and disengaged from a locking end portion (25) of a lock plate (5) when said lock plate (5) is held in its locked position and its unlocked position, respectively;
• when said lock plate (5) is held in its unlocked position, said door handle (2) is capable of being pulled forward out of said base body (1);
• when said door handle (2) is thus pulled out forward, said stopping plate (11) pushes said cam slope (18) of said receiver lever (16) swingably upward so that said receiver lever (16) is moved to its unlocked position;
• when said lock plate (5) is held in its locked position, said lock plate (5) has its locking end portion (25) engaged with said restriction portion (26) of said slider (21) to prevent said receiver lever (16) from turning on pivot (17);
• each of said cam discs (41) being provided with a detecting groove (71) provided on its peripheral surface;
• said handle (2) being provided with a plurality of openings (75) which permit a resetting member (72) to access to said peripheral surface of each said cam disc (41);
• and
• each of said marks of each of said marked discs (4) for unlocking is detected by turning each of said marked discs (4) until each resetting member (72) is brought into engagement with each of said detecting grooves (71).