Abstract:
Although a door locking handle assembly is small as a whole in thickness, it permits through a computerized personal management system of users a plurality of persons or users to have easily access to instruments contained in a box which is provided with the door locking handle assembly. In this assembly, a combination lock ( 19 ), which is opened by turning each of a set of its specially marked dial discs ( 21 ) a given number of times to establish a unique combination of marks of the dial discs ( 21 ), is incorporated in a door handle ( 13 ) or a base body ( 1 ) of the assembly. In operation, a locking member ( 44 ) of the assembly prevents the door handle ( 13 ) from being pulled out of the base body ( 1 ), and is driven to reach its unlocked position when the combination lock ( 19 ) is opened.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a door locking handle assembly with a built-in combination lock of a pull-out and side-swinging lever-action type, in which a door handle is pivoted to a base body of the assembly so as to be pulled out forward and pushed back rearward relative to the base body and turned on its pivoted end. 
     2. Description of the Related Art 
     As is well known in the art, a door locking handle assembly of a conventional type shown in U.S. Pat. No. 5,467,623, herein incorporated by reference, has a construction in which: a base body of the assembly is fixedly mounted on a door; a door handle is pivoted to the base body so as to be pulled out forward and pushed back rearward relative to the base body and further turned sideward on its pivoted end after completion of its pulling-out operation; when the door handle is pulled out of the base body to assume its pulled-up or raised inclination position relative to the base body or turned sideward after completion of its pulling-out operation, a catch plate which serves as a door bolt directly or indirectly connected with the door handle is released from a receiving portion of a stationary frame element (i.e., door frame). In this type of conventional door locking handle assembly, a cylinder lock is incorporated in either the door handle or the base body. On the other hand, the door handle is pushed back rearward relative to the base body and held in its pushed-back or locked position in the base body. 
     In the conventional door locking handle assembly, an available space for mounting the assembly is extremely limited in each of opposite sides of the door to which the assembly is fixedly mounted because the interior space of a box or container for housing various instruments therein is relatively limited due to the presence of the instruments housed in the box. Due to this, it is necessary to considerably limit in size the projections of the assembly in opposite directions perpendicular to the plane of the door&#39;s surface. 
     In order to fulfill the above need, it is necessary to reduce in thickness the assembly as a whole by reducing in thickness the door handle and in depth the base body. However, this forces a cylinder lock of the assembly to be small in thickness. 
     On the other hand, in a thin-type cylinder lock, since the number of sets of disc tumblers and/or pin tumblers incorporated in the cylinder lock as components of its internal locking mechanism is small, the number of available keys of the cylinder lock is naturally limited. Due to this, in the case where there are a large number of eligible users of the instruments contained in the box which is provided with the door locking handle assembly employing the cylinder lock in a condition in which these users are controlled through a computerized personal management system, it is difficult to use the conventional door locking handle assembly which employs the thin-type cylinder lock. 
     Although the conventional door locking handle assembly described above has been fully appreciated by users, a need exists in the art for an improved one of such door locking handle assembly, which is improved in performance. 
     SUMMARY OF THE INVENTION 
     Under such circumstances, the present invention was made. Consequently, it is an object of the present invention to provide a door locking handle assembly, which is small in thickness as a whole and capable of providing a very large number of available keys of a combination lock incorporated in the assembly, wherein a large number of eligible persons or users of various instruments contained in a box or container provided with the door locking handle assembly are precisely controlled through a computerized personal management system. 
     It is possible to accomplish the above object of the present invention by providing: 
     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 the base body ( 1 ) so as to be capable of being pulled out forward and pushed back rearward relative to the 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 the door ( 2 ) is directly or indirectly connected with the 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 the door handle ( 13 ) is pulled out forward and then turned sideward on the locking shaft ( 10 ) after completion of the pulling-out operation of the door handle ( 13 ), said rack ( 12 ) being slidably supported and guided in its up and down linear motion relative to the door ( 2 ), the improvement wherein: 
     the combination lock ( 19 ), which is provided with a plurality of marked dial discs ( 22 ), is incorporated in the door handle ( 13 ) and opened by turning each of the marked dial discs ( 22 ) a given number of times to establish a predetermined combination of marks provided in outer peripheral surfaces of the dial discs ( 22 ); 
     a locking member ( 24 ) for preventing the door handle ( 13 ) from being pulled out of the base body ( 1 ) is juxtaposed with an inner surface of the door handle ( 13 ) to pass through a central portion of each of the plurality of marked dial discs ( 22 ) of the combination lock ( 19 ); 
     a rotor ( 44 ) of a cylinder lock ( 43 ) is embedded in a lock sleeve ( 46 ) in a manner such that the rotor ( 43 ) is not capable of rotating relative to the lock sleeve ( 46 ), the cylinder lock ( 43 ) being embedded in the base body ( 1 ); 
     the lock sleeve ( 46 ) is provided with a locking projection ( 48 ) in its outer peripheral surface to make the locking projection ( 48 ) engageable with a lower-end latch member ( 35 ) connected with a lower end portion of the locking member ( 24 ); 
     both the marked dial discs ( 22 ) and the locking member ( 24 ) are resiliently pressed under a spring member ( 27 ), which permits the lower-end latch member ( 35 ) to be engaged with and disengaged from the locking projection ( 48 ) of the lock sleeve ( 46 ) when the rotor ( 44 ) of the cylinder lock ( 43 ) is turned to its locked and its unlocked position by means of a key, respectively, the key being inserted into a keyhole of the rotor ( 44 ); and 
     formed in the locking projection ( 48 ) of the lock sleeve ( 46 ) is a rear cam slope ( 50 ) for driving the locking member ( 24 ) upward against a resilient force exerted by the spring member ( 27 ) when the door handle ( 13 ) is pulled out of the base body ( 1 ) after the combination lock ( 19 ) is unlocked. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The above and other objects, advantages and features of the present invention will be more apparent from the following description taken in conjunction with the accompanying drawings in which: 
     FIG. 1 is a front view of a first embodiment of the door locking handle assembly of the present invention; 
     FIG. 2 is a left side view of the door locking handle assembly shown in FIG. 1; 
     FIG. 3 is a plan view of the door locking handle assembly shown in FIG. 1; 
     FIG. 4 is a rear view of the door locking handle assembly shown in FIG. 1 in a condition in which a door latch mechanism including the rack is removed; 
     FIG. 5 is a longitudinal sectional view of the door locking handle assembly, taken along the line A—A of FIG. 1; 
     FIG. 6 is a longitudinal sectional view of the door locking handle assembly, taken along the line B—B of FIG. 2; 
     FIG. 7 is a longitudinal sectional view of the door locking handle assembly, taken along the line A—A of FIG. 1, which illustrates the door handle having been unlocked from the base body in the beginning of unlocking process of the door handle; 
     FIG. 8 is a longitudinal sectional view of the door locking handle assembly, taken along the line A—A of FIG. 1, which illustrates the door handle after completion of its unlocking process; 
     FIG. 9 is a longitudinal sectional view of the door locking handle assembly, taken along the line A—A of FIG. 1, which illustrates the door handle having been unlocked using the cylinder lock; 
     FIG. 10 is a longitudinal sectional view of the door locking handle assembly, taken along the line A—A of FIG. 1, which illustrates the door handle after completion of its unlocking process using the cylinder lock; 
     FIG. 11 is a side view of the locking member built in the door locking handle assembly shown in FIG. 1; 
     FIG. 12 is a front view of a lower-end latch member connected with a lower end portion of the locking member shown in FIG. 11; 
     FIG. 13 is a left side view of the lower-end latch member shown in FIG. 12; 
     FIG. 14 is a plan view of the lower-end latch member shown in FIG. 12; 
     FIG. 15 is a cross-sectional view of the lower-end latch member, taken along the line C—C of FIG. 12; 
     FIG. 16 is a rear view of the lock sleeve of the cylinder lock incorporated in the door locking handle assembly shown in FIG. 1; 
     FIG. 17 is a plan view of the lock sleeve shown in FIG.  16 . 
     FIG. 18 is a cross-sectional view of the lock sleeve, taken along the line D—D of FIG. 16; 
     FIG. 19 is a cross-sectional view of the lock sleeve, taken along the line E—E of FIG. 16; 
     FIG. 20 is a front view of the door handle employed in the door locking handle assembly shown in FIG. 1; 
     FIG. 21 is a left side view of the door handle shown in FIG. 20; 
     FIG. 22 is a rear view of the door handle shown in FIG. 20; 
     FIG. 23 is a longitudinal section view of the door handle, taken along the line F—F of FIG. 20; 
     FIG. 24 is a plan view of the door handle shown in FIG. 20; 
     FIG. 25 is a cross-sectional view of the door handle, taken along the line G—G of FIG. 22; 
     FIG. 26 is a cross-sectional view of the door handle, taken along the line H—H of: FIG. 22; 
     FIG. 27 is a cross-sectional view of the door handle, taken along the line I—I of FIG. 22; 
     FIG. 28 is a cross-sectional view of the door handle, taken along the line J—J of FIG. 22; 
     FIG. 29 is a cross-sectional view of the door handle, taken along the line K—K of FIG. 22; 
     FIG. 30 is a cross-sectional view of the door handle, taken along the line L—L of FIG. 22; 
     FIG. 31 is a cross-sectional view of the door handle, taken along the line M—M of FIG. 22; 
     FIG. 32 is a front view of a back plate member employed in the door handle shown in FIG. 20; 
     FIG. 33 is a plan view of the back plate member shown in FIG. 32; 
     FIG. 34 is a left side view of the back plate member shown in FIG. 32; 
     FIG. 35 is a rear view of the back plate member shown in FIG. 32; 
     FIG. 36 is a longitudinal sectional view of the back plate member, taken along the line N—N of FIG. 32; 
     FIG. 37 is a cross-sectional view of the back plate member, taken along the line O—O of FIG. 32; 
     FIG. 38 is a cross-sectional view of the back plate member, taken along the line P—P of FIG. 32; 
     FIG. 39 is a cross-sectional view of the back plate member, taken along the line Q—Q of FIG. 32; 
     FIG. 40 is a cross-sectional view of the back plate member, taken along the line R—R of FIG. 32; 
     FIG. 41 is a cross-sectional view of the back plate member, taken along the line S—S of FIG. 32; 
     FIG. 42 is a front view of the dial disc of the combination lock incorporated in the door locking handle assembly shown in FIG. 1; 
     FIG. 43 is a plan view of the dial disc shown in FIG. 42; 
     FIG. 44 is a longitudinal sectional view of the dial disc, taken along the line T—T of FIG. 43; 
     FIG. 45 is a plan view of a cam disc of the combination lock incorporated in the door locking handle assembly shown in FIG. 1; 
     FIG. 46 is a bottom view of the cam disc shown in FIG. 45; 
     FIG. 47 is a front view of the cam disc shown in FIG. 45; 
     FIG. 48 is a rear view of the cam disc shown in FIG. 45; 
     FIG. 49 is a left side view of the cam disc shown in FIG. 45; 
     FIG. 50 is a longitudinal sectional view of the cam disc, taken along the line U—U of FIG. 45; 
     FIG. 51 is a front view of a resilient detent member incorporated in the combination lock of the door locking handle assembly shown in FIG. 1; 
     FIG. 52 is a left side view of the resilient detent member shown in FIG. 51; 
     FIG. 53 is a plan view of the resilient detent member shown in FIG. 51; 
     FIG. 54 is an enlarged longitudinal sectional view of an essential part of the door handle, taken along the line A—A of FIG. 1, which illustrates the lower-end latch member held in its extended position; 
     FIG. 55 is a cross-sectional view of the door handle, taken along the line V—V of FIG. 54; 
     FIG. 56 is a cross-sectional view of the door handle, taken along the line W—W of FIG. 54; 
     FIG. 57 is an enlarged longitudinal sectional view of an essential part of the door handle, taken along the line A—A of FIG. 1, which illustrates the lower-end latch member held in its retracted position; 
     FIG. 58 is a cross-sectional view of the door handle, taken along the line X—X of FIG. 57; and 
     FIG. 59 is a cross-sectional view of the door handle, taken along the line Y—Y of FIG.  57 . 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The best modes for carrying out the present invention will be described in detail using embodiments of the present invention with reference to the accompanying drawings. In a first embodiment of a door locking handle assembly with a built-in combination lock according to the present invention, as shown in FIG. 5, a base body  1  of the door locking handle assembly is fixedly mounted on a front surface of a door  2 , which is provided with a mounting hole  3 . More specifically, a screw  7  is inserted into a through-hole  8  of a fastening casing  5  from its rear side, passes through this fastening casing  5  forward, and is threadably engaged with a threaded hole  6  of a rear portion of the base body  1 , so that a door  2  is firmly sandwiched between the base body  1  and the fastening casing  5 . Incidentally, the fastening casing  5  is combined with a rack  12  to form a door latch mechanism  4 , wherein the rack  12  serves as a door bolt for the door  2 . 
     On the other hand, a bearing hole  9  is formed in an upper portion of the base body  1  to extend in a direction perpendicular to a front surface of the door  2 . Rotatably received in such a bearing hole  9  of the base body  1  in an insertion manner is a locking shaft  10 . As is clear from FIG. 5, the locking shaft  10  is provided with a shoulder portion in its substantially intermediate portion. This intermediate shoulder portion of the locking shaft  10  prevents the locking shaft  10  from axially sliding relative to the base body  1 . The locking shaft  10  is provided with a square hole  10   a  in its rear portion. Fixedly received in such a square hole  10   a  of the locking shaft  10  in an insertion manner is a corresponding square column portion formed in a front end portion of a pinion shaft  11 . As is clear from FIG. 6, the pinion shaft  11  is provided with a pinion gear formed in an outer peripheral surface of its rear end portion. Such a pinion gear of the pinion shaft  11  meshes with a rack  12 , which serves as a door bolt for the door  2 . The rack  12  is slidably supported and guided in the door latch mechanism  4  of the door  2 , and capable of moving up and down relative to the door latch mechanism  4  so as to be engaged with and disengaged from a receiving portion “3” of a stationary frame element “2” of a box containing the instruments therein, which permits the door “1”, of the box to be opened, wherein: the reference numerals “3”, “2” and “1” enclosed in double quotation marks are used in the prior art: U.S. Pat. No. 5,467,623, herein incorporated by reference. 
     As is clear from FIG. 5, formed in an upper rear portion of the door handle  13  is a concave portion  14 . This concave portion  14  assumes a substantially fan-like shape in longitudinal section to swingably receive therein a front end portion of the locking shaft  10 . More specifically, the door handle  13  had its upper end portion corresponding to its concave portion  14  pivoted to the front end portion of the locking shaft  10  through a cross pivot  15 . This cross pivot  15  extends in parallel with a front surface of the door  2  in a direction perpendicular to the longitudinal axis of the door handle  13 . In operation, when the door handle  13  is folded down so as to be embedded in the base body  1 , it is possible for a front concave portion  16  of the base body  1  to receive therein a rear portion of an essential part of the door handle  13 . Formed in each of opposite sides of a lower end portion of the door handle  2  is a flange serving as a fingertip engaging edge portion  17 , which bulges out sideward in a direction perpendicular to the longitudinal axis of the door handle  13 , as shown in FIG.  20 . As is clear from FIG. 2, even when the door handle  13  is in its folded position, both the fingertip engaging edge portions  17  of the door handle  13  are still spaced apart forward from a front surface of the corresponding lower portion of the base body  1 , which enables the user to pick up the lower free end portion of the door handle  13  in an easy manner. 
     On the other hand, when the door handle  13  is in its raised position in which the door handle  13  is inclined forward as viewed in FIG. 8, it is possible for the user to swing sideward or rotate the door handle  13  on the locking shaft  10  together with this locking shaft  10  relative to the base body  1 . In construction, as shown in FIG. 5, the locking shaft  10  has its rear end portion coaxially fixed to a pinion shaft  11 . As shown in FIG. 6, the pinion shaft  11  is provided with a pinion gear in an outer peripheral surface of its rear end portion. Due to the above construction, the locking shaft  10  thus rotated together with the door handle  13  drives the pinion shaft  11  so as to rotate the pinion gear of the pinion shaft  11 . Since the pinion gear of the pinion shaft  11  meshes with the rack  12  (shown in FIG.  6 ), the rack  12  is slidably moved up and down relative to the door  2  when the door handle  13  is turned on the locking shaft  10 . As a result, the door  2  is unlocked or released from the stationary frame element which is denoted by the reference numeral “2” in the prior art: U.S. Pat. No. 5,467,623, herein incorporated by reference. This makes it possible for the user to open the door  2  by simply pulling the door handle  13  forward. Consequently, it is possible for the user to inspect and maintain his or her instruments contained in the main body of the box. 
     Formed in an intermediate portion of the door handle  13  to extend in the longitudinal direction of the door handle  13  is an elongated hollow portion  20  for receiving therein a combination lock  19 . The hollow portion  20  of the door handle  13  is open at the rear side of the door handle  13  to form an opening which is covered by a back plate member  21 . 
     The combination lock  19  is constructed of a plurality of its components. Essential ones of these components of the combination lock  19  are: a plurality of marked dial discs  22 ; a plurality of cam discs  23  combined with the dial discs  22 ; and, a rod-shaped locking member  24  for preventing the door handle  13  from being pulled out of the base body  1 . As is clear from FIG. 5, a lower end portion of the locking member  24  is bent to form a lower-end bent portion which is inserted in a bent recess  35   a  of a lower-end latch member  35 , so that the locking member  24  is connected with the lower-end latch member  35 . 
     As is clear from Fig. FIG. 50, each of the cam discs  23  assumes a short cylindrical shape, and is provided with a through-hole  23   a  which axially passes through a center of the cam disc  23 . The locking member  24  passes through the through-hole  23   a  of the cam disc  23 . On the other hand, as shown in FIG. 44, each of the marked dial discs  22  is provided with a small-diameter bore portion  22   a  and a large-diameter bore portion  22   b.  These bore portions  22   a ,  22   b  are combined with each other to form a through-hole, which axially passes through a center of each of the dial discs  22 . As is clear from FIG. 54, a spring member  27  is constructed of a compression coil spring to exert its resilient force on the uppermost one of the cam discs  23 . In operation, when the lowermost one of the cam discs  23  is axially moved upward against a resilient force of the spring member  27  relative to the corresponding dial disc  22  to have its upper end portion enter the small-diameter bore portion  22   a  of the corresponding dial disc  22 , this cam disc  23  has an interlocking projection  26  of its outer peripheral surface engaged with an interlocking groove  25  of an inner peripheral surface of the small-diameter bore portion  22   a  of the corresponding dial disc  22 . In contrast with this, in locked condition of operation shown in FIG. 54, the cam disc  23  has its lower portion extend downward from the small-diameter bore portion  22   a  of the corresponding dial disc  22  under the effect of the resilient force exerted by the spring member  27 . Consequently, as is clear from FIG. 54, in this locked condition of operation, the interlocking projection  26  (shown in FIG. 49) of the cam disc  23  is disengaged from the interlocking groove  25  (shown in FIG. 43) of the corresponding dial disc  22 . 
     As shown in FIG. 46, the cam disc  23  is provided with a plurality of positioning projections  26   a  in its outer peripheral surface. The number of these positioning projections  26   a  is equal to the number of a plurality of marks having been applied to an outer peripheral surface of the dial disc  22 . These marks are denoted by the Roman numerals, for example such as “2”, “1”, “0”, as shown in FIG. 42, and spaced apart from each other at predetermined equal angular intervals. As shown in FIG. 49, the positioning projection  26   a  of the cam disc  23  is formed in a proximal end portion of the interlocking projection  26 . On the other hand, the back plate member  21  is fixedly mounded on the inner surface of the door handle  13  by means of a plurality of screws  30  (shown in FIG.  10 ), each of which screws  30  is threadably engaged with a threaded hole  29  (shown in FIG. 23) of each of a plurality of guide projections  28 . As shown in FIG. 36, the back plate member  21  is provided with at least one positioning groove  31 , which is engaged with at least one of the positioning projections  26   a  of the cam disc  23 . 
     As shown in FIG. 42, a plurality of detent grooves  32  are formed in an outer peripheral surface of the dial disc  22  at predetermined equal angular intervals in a manner such that each of the detent grooves  32  is sandwiched between adjacent ones of the marks having been applied to the outer peripheral surface of the dial disc  22 . Consequently, the number of the detent grooves  32  is equal to that of the marks applied to the outer peripheral surface of the dial disc  22 . As shown in FIG. 55, a detent leaf spring  33  is fixedly mounted in the elongated hollow portion  20  of the door handle  13  to have its free end portion detachably engaged with each of the detent grooves  32  of the dial disc  22 . This enables each of the dial discs  22  to be held in its predetermined angular position, and therefore to establish a unique combination of the marks of the dial discs  22 . 
     It is possible for the user to arbitrarily modify such a unique combination for unlocking the combination lock  19  by simply turning any one of dial discs  22  using his or her fingertip. 
     Such modification procedure of the combination of the marks is as follows: namely, in a condition in which the door handle  13  is in its raised position shown in FIG. 8, at first, it is necessary for the user to push up the lower-end latch member  35  into a hollow portion  36  of the door handle  13  by using his or her finger, as shown in FIG.  57 . When the lower-end latch member  35  is pushed up relative to the door handle  13 , the lowermost one of the cam discs  23  is moved upward against a resilient force exerted by the coil spring member  27  since the lowermost cam disc  23  has its bottom surface abut against an interlocking ring  37  which is fixedly mounted on the locking member  24 . As is clear from FIG. 54, the locking member  24  has its lower end portion engaged with the lower-end latch member  35 , which makes it possible to move up the lowermost one of the cam discs  23  against the resilient force exerted by the coil spring member  25  when the lower-end latch member  35  is moved up into the hollow portion  36  of the door handle  13 . As a result, an upper end portion of the cam disc  23  enters the small-diameter bore portion  22   a  of the dial disc  22 , so that the positioning projection  26   a  of the cam disc  23  is axially moved up out of the positioning groove  31  (shown in FIG. 36) of the back plate member  21 . At this time, the interlocking projection  26  of the cam disc  23  is engaged with the corresponding interlocking groove  25  of the dial disc  22 . 
     As a result, the cam disc  23  is interlocked with the corresponding dial disc  22 . Consequently, under such circumstances, when the dial disc  22  is turned through a predetermined angle by the user, the cam disc  23  is also turned through the same predetermined angle. After completion of modification in combination of the marks, when the lower-end latch member  35  is released from the pressure applied by the user&#39;s finger, the coil spring member  27  drives the cam disc  23  downward to force the upper end portion of the cam disc  23  to separate from the small-diameter bore portion  22   a  of the corresponding dial disc  22 . As a result, only the dial disc  22  thus separated from the corresponding cam disc  23  become rotatable. Under such circumstances, p when the dial disc  22  thus separated from the cam disc  23  is turned arbitrarily, it is possible to move the interlocking groove  25  of the dial disc  22  to an angular position in which the interlocking groove  25  fails to align with the interlocking projection  26  of as the corresponding cam disc  23 . In such an angular position, it is not possible for the cam disc  23  to enter the small-diameter bore portion  22   a  of the corresponding dial disc  22 . This realizes the locked condition of operation. 
     When the eligible user who knows the combination of the marks of the dial discs  22  establishes such combination by turning the individual dial discs  23 , the interlocking grooves  25  of the dial discs  22  align in angular position with the corresponding interlocking projections  26  of the cam discs  23  to receive these projections  26  therein, so that the combination lock  19  is unlocked. 
     As is clear from FIG. 54, a plurality of the cam discs  23  are vertically stacked into a neat pile between the coil spring member  27  and the interlocking ring  37  in a manner such that such a neat pile of the cam discs  23  are resiliently urged against the interlocking ring  37  under the effect of a resilient force exerted by the coil spring member  27  which is mounted over an upper portion of the locking member  24 . 
     In order to make it easy for the user to catch the marks applied to the outer peripheral surfaces of the dial discs  22  and also make it easy for the user to turn these dial discs  22  using his or her fingertip, the dial disc  22  is so arranged as to have a part thereof extended forward (i.e., upward in FIG. 55) from a slot  38  formed in the front surface of the door handle  13 . In this first embodiment, as is clear from FIG. 42, each of the marks of the dial discs  22  is constructed of a predetermined numeric character, for example such as any one of numerals from “0” to “9”. These marks or numerals are angularly spaced apart from each other at predetermined equal angular intervals. On the other hand, the locking member  24  passes through the though-holes  23   a  formed in the centers of the cam discs  23 . 
     When the unique combination of the marks of the dial discs  22  is established by the eligible user who knows such unique combination, the interlocking groove  25  of the dial disc  22  is aligned in angular position with the interlocking projection  26  of the cam disc  23  to receive therein the interlocking projection  26  of the cam disc  23  when the cam disc  23  is moved upward as shown in FIG. 54, which permits the combination lock  19  to be unlocked. 
     Under such circumstances, when the user has his or her fingertip engaged with the fingertip engaging edge portions  17  of the lower free end portion of the door handle  13  and swingably pulls forward the door handle  13  from the front surface of the base body  1 , as shown in FIGS. 7 and 8, the locking member  24  is pushed upward against a resilient force exerted by the coil spring member  27  since the lower end portion of the lower-end latch member  35  having been connected with the locking member  24  is pushed upward by means of a rear cam slope  50  of a locking projection  48  which is provided in an outer peripheral surface of a lock sleeve  46 . As shown in FIG. 5, the lock sleeve  46  is rotatably mounted on a fixed casing portion  47  of the base body  1  to cover an outer peripheral surface of the fixed casing portion  47 , wherein the fixed casing portion  47  assumes an inner sleeve-like projection extending from the front to the rear. Therefore, at this time, the front end portion of each of the cam discs  23  enters the small-diameter bore portion  22   a  of the corresponding dial discs  22 , so that the interlocking projection  26  of the cam disc  23  is engaged with the interlocking groove  25  of the corresponding dial disc  22 . 
     In a brief summary, a time when the door handle  13  is released from the base body  1  is a time when the lower-end latch member  35  is pushed upward to reach its uppermost position shown in FIG.  7 . After the lower-end latch member  35  reaches its uppermost position, the door handle  13  is further pulled up or swung forward through a predetermined angle, as shown in FIG.  8 . Then, the door handle  13  is turned on the locking shaft  10  through a predetermined angle in a direction perpendicular to the paper of FIG. 8, so that the rack  12  of the door  2  is retracted from a stationary frame element, wherein such a stationary frame element is disclosed in the prior art: U.S. Pat. No. 5,467,623, herein incorporated by reference. As a result, the door  2  is unlocked from the stationary frame element. 
     In the above embodiment described with reference to FIGS. 5,  7  and  8 , the cylinder lock  43  is completely out of use in a condition in which the locking projection  48  of the lock sleeve  46  serves as if it were a stationary receiving portion for receiving a door bolt and were fixedly mounted on the base body  1 . Further, the door handle  13  is locked and unlocked using only the combination lock  19 . 
     The following describes a second mode of operation of the door locking handle assembly of the present invention. Such a second mode of operation is shown in FIGS. 9 and 10, in which the locking projection  48  of the cylinder lock  43  is positively used in locking and unlocking operation of the door locking handle assembly. 
     In other words, in the second mode of operation, the unique combination of the marks of the dial discs  22  is not established in the combination lock  19 . The lower-end latch member  35  mounted on a lower end portion of the locking member  24  serves as if it were a receiving portion having been fixedly mounted on the door handle  13 . 
     When the eligible user, who keeps a regular key, inserts the key into a keyhole of a rotor  44  of the cylinder lock  43  and turns the rotor  44  in a predetermined direction through a predetermined angle, the lock sleeve  46  is rotated together with the rotor  44 , so that the locking projection  48  is rotatably driven from a position shown in FIG. 5 to a new position shown in FIG.  9 . 
     Due to the above rotational motion, the lower-end latch member  35 , which is connected with the locking member  24  in the side of the combination lock  195  is disengaged from the locking projection  48  of the cylinder lock  43 . This permits the door handle  13  to be unlocked from the base body  1 . As a result, it is possible for the door handle  13  to be swingably raised from its folded position. 
     The cylinder lock  43  is provided with an internal locking mechanism, for example such as a conventional pin tumbler locking mechanism. In such an internal locking mechanism, the lock sleeve  46  is non-rotatably mounted on a rear end square shaft portion  45  of the rotor  44  of the cylinder lock  43  in an insertion manner. As is clear from FIG. 5, the lock sleeve  46  covers substantially the entire outer peripheral surface of the fixed casing portion  47  of the cylinder lock  43 . The lock sleeve  46  is provided  14  with the locking projection  48  in its outer peripheral surface. As shown in FIG. 5, the locking projection  48  of the lock sleeve  46  extends radially outwardly to form an angle of approximately 270 degrees at its crest (i.e., outermost portion). In other words, the locking projection  48  forms substantially a triangular shape in cross section, as shown in FIG. 5, wherein: such a triangular shape is formed of a front cam slope  49  and a rear cam slope  50 . This rear cam slope  50  functions to drive the locking member  24  upward through the lower-end latch member  35  against a resilient force exerted by the spring member  27  when the door handle  13  is pulled out of the base body  1  after the combination lock  19  is unlocked. 
     The internal locking mechanism of the cylinder lock  43  may be of any one of conventional types such as a disc tumbler type, a pin tumbler type and the like, in other words, the internal locking mechanism of the cylinder lock  43  does not relate to anything about the gist of the present invention. 
     In operation, as is clear from FIG. 7, when the door handle  13  is pushed back to its folded position, the lower-end latch member  35  is brought into press-contact with the front cam slope  49  of the locking projection  48  of the lock sleeve  46 , and moved upward against the resilient force exerted by the coil spring member  27  to pass the crest of the locking projection  48 . When the lower-end latch member  35  passes through the crest of the locking projection  48  of the lock sleeve  46  to reach the rear cam slope  50  of the locking projection  48  as shown in FIG. 5, the lower-end latch member  35  is forcibly driven downward under the influence of the resilient force exerted by the coil spring member  27  to permit the door handle  13  to reach its folded position, so that the door handle  13  is locked to the base body  1 . 
     In the door locking handle assembly of the present invention, a control operator of the instruments housed in the box allocates to each of a large number of eligible users a unique combination of marks of the marked dial discs  22  of the combination lock  19  for unlocking and locking the combination lock  19 . 
     Each of the eligible users is capable of unlocking the combination lock  19  of the door locking handle assembly by turning in a normal or a reverse direction each of the marked dial discs  22  a given number of times to establish the unique combination having been allocated to each user, wherein the marks are provided in an outer peripheral surface of each of the dial discs  22 . 
     Once such a unique combination of the marks is established, the combination lock  19  is capable of moving to its unlocking position. Through this movement to the unlocking position of the combination lock  19 , the locking member  24  is released from its restricted condition and capable of moving to its unlocking position. Due to this, the door handle  13  is released from the base body  1  of the assembly to move to its pulled-up or inclined position. At this time, i.e., when the door handle  13  is swingably pulled out of the base body  1 , the lower-end latch member  35 , which is connected with the lower end portion of the locking member  24  and brought into contact with the rear cam slope  50  of the locking projection  48  of the lock sleeve  46 , is pushed upward against the resilient force, which is exerted by the spring member  27  on the lower-end latch member  35  through the locking member  24 , to permit the lower-end latch member  35  to be disengaged from the locking projection  48  of the lock sleeve  46 . As a result, it is possible for the user to turn the door handle  13  forward through a predetermined angle up to its pulled-up or raised position. 
     On the other hand, even when any unique combination of the marks of the dial discs  22  is not established in the combination lock  19 , it is possible for a person holding a key of the cylinder lock  43  to release the lower-end latch member  35  from the locking projection  48  of the lock sleeve  46  by using such a key enabling the person to rotate the rotor  44  of the cylinder lock  43  through a predetermined angle. Once the locking member  24  is released from the lock sleeve  46  of the base body  1 , it is possible for such a person to pull forward the door handle  13  out of the base body  1  and further turn it through a predetermined angle up to the pulled-up position of the door handle  13 . 
     When the door handle  13  is pulled forward out of the base body  1  and then turned on its locking shaft  10  sideward, the rack  12  serving as a door bolt for the door  2  is slidably moved downward relative to the door  2  and therefore disengaged from the receiving portion of the stationary frame element such as the main body of the box, so that the door  2  of the box is opened. 
     While the present invention has been particularly shown and described with reference to the preferred embodiments and a modification thereof, it will be understood by those skilled in the art that various modifications and changes may be made therein without departing from the spirit of the present invention as defined by the appended claims.