Door locking handle assembly with built-in combination lock

In a door locking handle assembly with a built-in combination lock (19), the assembly being provided with a base body (1) which is fixedly mounted on a door (2), wherein a door handle (13) 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 turning sideward on a locking shaft (10) after completion of its pulling-out operation, wherein a rack (12) serving as a door bolt for said door (2) is directly or indirectly connected with said door handle (13) so as to be engaged with and disengaged from a receiving portion of a stationary frame element such as a main body of a box when said door handle (13) is pulled out forward and then turned sideward on said locking shaft (10) after completion of the pulling-out operation of said door handle (13), said rack (12) being slidably supported and guided in its up and down linear motion relative to said door (2), the improvement wherein:

• said combination lock (19), which is provided with a plurality of marked dial discs (22), is incorporated in said door handle (13) and opened by turning each of said marked dial discs (22) a given number of times to establish a predetermined combination of marks provided in outer peripheral surfaces of said dial discs (22);
• each said marked dial discs (22) being held in a desired angular position by detent leaf spring (33) fixedly mounted in said door handle (13);
• a locking member (24) for preventing said door handle (13) from being pulled out of said base body (1) is juxtaposed with an inner surface of said door handle (13) to pass through a central portion of each of said plurality of said marked dial discs (22) and an equal number of cam discs (23) provided each located adjacent to the dial discs (22) of said combination lock (19);
• said base body (1) is provided with a projection portion (40) in an inner peripheral surface of its lower end portion, wherein said projection portion (40) is provided with a front cam slope (42) and a rear cam slope (41) to have each of said cam slopes (42, 41) be engageable with a lower-end latch member (35) which is connected with a lower end portion of said locking member (24), wherein said rear cam slope (41) of said projection portion (40) drives said lower-end latch member (35) upward against a resilient force exerted by a spring member (27) when said door handle (13) is pulled out of said base body (1) after said combination lock (19) is unlocked;
• all said marked dial discs (22), said locking member (24) and said lower-end latch member (35) are resiliently urged downward under the influence of said resilient force exerted by said spring member (27), which permits said lower-end latch member (35) to be engaged with and disengaged from said projection portion (40) of said base body (1) when said combination lock (19) is locked and unlocked, respectively, said marked dial discs (22) being provided in an alternating relationship with an equal number of adjacent cam discs (23) all rotatably mounted on said elongated locking member (24);
• whereby said marked dial discs can be interlocked to each adjacent said cam disc (23) by a plurality of positioning projections (26a) which are inserted into a mating positioning groove (31);
• and
• said door handle (13) is connected to said rack (12) by a pinion shaft (11) and pinion gear, whereby a sideward turning of said door handle (13) and said locking shaft (10) can move said rack (12) upward and downward relative to said door (2).