Abstract:
The door lock with a clutch having a cam-styled axle sleeve comprises mainly of an outer lock part and an inner lock part, both the housings of the outer and the inner lock parts are provided with a handle to rotate the internal rotation axle thereof. The rotation axle of the outer lock part is provided thereon with the cam-styled axle sleeve; the rotation axle of the inner lock part is further connected with a second rotation axle. The axle sleeve of the outer lock part is controlled for positioning and moving by a control device. When the axle sleeve is positioned, the rotation axle of the outer lock part and the second rotation axle of the inner one are separated. Therefore, a dead bolt and a latch bolt protruding out of the door are not influenced by the rotation of the handle of the outer lock part; when the axle sleeve is moved forwards, the second rotation axle of the inner lock is integrally connected with the axle sleeve to control extending/contracting of the dead bolt and the latch bolt on the door.

Description:
BACKGROUND OF THE INVENTION  
         [0001]    1. Field of the Invention  
           [0002]    The present invention is related to a door lock with a clutch having a cam-styled axle sleeve, and especially to providing a cam-styled axle sleeve on a rotation axle of an outer lock part. By controlling whether the cam-styled axle sleeve is connected with a rotation axle of an inner lock part with a control device, the effect of opening and closing of the door lock is controlled, which particularly suits the lock structures of a gate, a room door etc.  
           [0003]    2. Description of the Prior Art  
           [0004]    Conventional lock structures are mainly mounted on door panels with an inner and an outer side, such a door lock is generally comprised of a dead bolt, two fixing seats, a restoring mechanism with a torsional spring in a receiving chamber, a restoration mechanism to move back a linking-up column by means of a torsion spring, a connecting mechanism to fix the two fixing seats on the door panel, and two handles respectively on the two fixing seats to be linked up with a control rod. Such a door lock structure needs multiple operating steps to open the lock indoors, and will delay the time for fleeing from danger; thereby it is not an ideal device.  
           [0005]    The inventor of the present invention develops a novel door lock with a clutch having a cam-styled axle sleeve, which can be easily opened indoors, and can be opened outdoors electrically or manually.  
         SUMMARY OF THE INVENTION  
         [0006]    The main object of the present invention is to provide a door lock with a clutch having a cam-styled axle sleeve. By controlling the cam-styled axle sleeve through an outer lock part provided with a control device, the cam-styled axle sleeve moves forwards to connect with a second rotation axle of an inner lock part to control opening and closing of the door lock.  
           [0007]    The secondary object of the present invention is to provide a door lock with a clutch having a cam-styled axle sleeve, wherein through the inner lock part, the door can be opened indoors any time by directly pressing down the inner handle on the door, especially favor fleeing from danger in an emergency.  
           [0008]    To achieve the objects stated above, the present invention is comprised mainly of an inner lock part and an outer lock part integrated with each other, and are further combined with a dead bolt and a telescopic spring-loaded latch bolt mounted on a lateral side of a door panel. The outer lock part is mounted on the outer side of a door panel, and the inner lock part on the inner side; both the housings of the inner and the outer lock parts are provided with a handle to drive the internal rotation axle thereof. The rotation axle of the outer lock part is provided thereon with a cam-styled axle sleeve which is controlled for forwarding or positioning by another element of the outer lock part a control device; the rotation axle of the inner lock part can drive an inner pull rod, where the remote end connects another axle of the inner lock part and is linked up with the dead bolt. The front end of the rotation axle of the inner lock part is further connected with a second rotation axle in addition to being linked up with the latch bolt. The second rotation axle can be telescopically connected with the cam-styled axle sleeve of the rotation axle of the outer lock part to make integration of the rotation axle of the outer lock part with the rotation axle of the inner lock part. By rotation of the handles to control extending and contracting of the dead bolt and the latch bolt on the door; the door is opened by pressing down the handle of the inner lock part or the outer lock part. When the cam-styled axle sleeve of the outer lock part is controlled and positioned by the control device, the rotation axle of the outer lock part and that of the inner lock part are separated, therefore the dead bolt and the latch bolt on the door are not influenced by the revolving direction or prizing of the handle of the outer lock part. By virtue that the rotation axle of the inner lock part can be linked up with the dead bolt and the latch bolt, so that in any state, rotation of the handle of the inner lock part can control extending and contracting of the dead bolt and the latch bolt on the door. And the control device can allow the lock to control displacement of the cam-styled axle sleeve of the outer lock part manually, or automatically by providing with an electric circuit board, a motor and a gear etc. to cooperate with an externally connected card reader, a code reader, a remote control etc. to open the lock in a more convenient and safer way.  
           [0009]    The present invention will be apparent in its features and specific structure after reading the detailed description of the preferred embodiment thereof in reference to the accompanying drawings. 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0010]    [0010]FIG. 1 is a perspective view of an embodiment of the present invention connecting with a door panel;  
         [0011]    [0011]FIG. 2 is an analytic perspective view showing the elements of an outer lock part of the embodiment of the present invention;  
         [0012]    [0012]FIG. 3 is an analytic perspective view showing the elements of a control device of the embodiment of the present invention;  
         [0013]    [0013]FIG. 4 is an analytic perspective view showing the elements of an inner lock part of the embodiment of the present invention;  
         [0014]    [0014]FIG. 5 is a sectional view of the embodiment of the present invention after assembling;  
         [0015]    [0015]FIG. 5 a  is a schematic sectional view showing invalidation of operation of the outer lock part of the present invention;  
         [0016]    [0016]FIG. 5 b  is a partially enlarged schematic view of the outer lock part of the present invention;  
         [0017]    [0017]FIG. 5 c  is a schematic sectional side view of the outer lock part of the present invention;  
         [0018]    [0018]FIG. 6 is a schematic sectional view showing effectiveness of operation of the outer lock part of the present invention;  
         [0019]    [0019]FIG. 6 a  is a partially enlarged schematic view of the outer lock part of the present invention;  
         [0020]    [0020]FIG. 6 b  is a schematic sectional side view of the outer lock part of the present invention;  
         [0021]    [0021]FIG. 7 is a schematic view showing opening of the door in using the inner lock part of the present invention;  
         [0022]    [0022]FIG. 8 is a schematic view showing closing of the door in using the inner lock part of the present invention. 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT  
       [0023]    Referring to FIG. 1, the door lock with a clutch having a cam-styled axle sleeve of the present invention is comprised of an outer lock part  10 , an inner lock part  40 , a dead bolt  60  and a spring-loaded latch bolt  70  mounted together on a door panel  80 .  
         [0024]    Wherein: referring to FIG. 2, the outer lock part  10  is a housing with a suitable size, and is provided at suitable locations therein with screw studs and protruding blocks for screwing connecting and positioning of the remaining members. The outer lock part  10  is provided on the housing surface thereof with a handle  11  for rotating an inner rotation axle  13 ; when the rotation axle  13  is connected with the handle  11 , a spring  12  is provided between them for restoration of the handle  11 . The front and the rear portions of the rotation axle  13  are square stubs with different perimeters; a pot-like member  131  flares out from the step like surface between the front and the rear portions; the pot-like member  131  is provided thereon with a positioning notch  132 ; the front square stub with a smaller perimeter is provided on the end face thereof with a protruding post  133 ; a spring  14  and a cam-styled axle sleeve  15  are slipped over the front square stub. The axle hole  17  of the cam-styled axle sleeve  15  is a through hole; the cam-styled axle sleeve  15  is provided at the middle section thereof externally with an engaging edge  16  to be engaged and controlled by a control device  20  provided above the rotation axle  13 .  
         [0025]    The control device  20  (referring to FIG. 3) is comprised of: a motor  21 , a gear  25 , an abutting block  27 , a pull rod  30  and a lid  23 . Wherein the axle of the motor  21  is in the form of a screw rod  22  to be engaged with the gear  25 ; the gear  25  is provided on one side thereof with a recess for positioning a protruding block provided on the housing and is provided on the other side with an eccentric protruding block  26  for placing in a recess  28  on the abutting block  27 . The abutting block  27  is provided on the top thereof with a positioning groove  29  for positioning of the pull rod  30  (on the abutting block  27 ) having on one end thereof a sheet  32 , on the other end thereof a positioning block  31  and being slipped thereover by a spring  33 . And the lid  23  with a pair of positioning bars  24  is locked in the housing. The abutting block  27  is provided on the top thereof with a positioning groove  29  for positioning of the pull rod  30  (on the abutting block  27 ) having on one end thereof a sheet  32 , on the other end thereof a positioning block  31  and being slipped thereover by a spring  33 . And the lid  23  with a pair of positioning bars  24  is locked in the housing. The abutting block  27  is exactly abutted on the engaging edge  16  of the cam-styled axle sleeve  15 . And referring to FIG. 2, the pull rod  30  extending out of the lid  23  is engaged with a protruding member  19  provided on a lock core rod of a locking member  18 , a circuit board  90  is added to receive the electronic signals to control rotation of the motor  21 .  
         [0026]    As shown in FIG. 4, the inner lock part  40  has a size in coincidence with that of the housing of the outer lock part  10 , the housing is provided at locations therein with screw studs and protruding blocks for screwing connecting and positioning of the remaining members. The inner lock part  40  is provided on the housing surface thereof with a handle  41  for rotating an inner rotation axle  43 ; when the rotation axle  43  is connected with the handle  41 , a spring  42  is provided between them for restoration of the handle  41 . The front and the rear portions of the rotation axle  43  are in different shapes, the front portion in connecting with the handle  41  is a square stub; while the rear portion is a round member which is provided in the center thereof with a recessed axle hole  44 , the axle hole  44  is inserted therein with a second rotation axle  46  which is provided on one end thereof with a recess  461  (as shown in FIG. 2). The round member on the rear portion of the rotation axle  43  is provided laterally with a protruding post  45  able to move an inner pull rod  47  which is provided on the other end thereof with an elongate slot  48 . The elongate slot  48  is to be slipped over a protruding post  50  provided on an axle seat  49 ; the axle seat  49  is provided thereon with a cross hole  51  which is provided on the inner end thereof with a cross mandrel  52 , and is further provided on the outer end thereof with an indicating disk  53 .  
         [0027]    The dead bolt  60  and the spring-loaded latch bolt  70  is mounted together on the door panel  80  when the present invention is connected with the door panel  80 , as shown in FIG. 5. The inner lock part  40  is mounted inside the door panel  80 , while the outer lock part  10  is mounted outside the door panel  80  opposite to the inner lock part  40 . The recess  461  on the end of the second rotation axle  46  linked up with the handle  41  of the inner lock part  40  is connected with the protruding post  133  on the end face of the rotation axle  13  linked up with the handle  11  of the outer lock part  10 , and the dead bolt  60  and the spring-loaded latch bolt  70  are both linked up with the inner lock part  40 ; the dead bolt  60  is controlled by the cross mandrel  52 , while the spring-loaded latch bolt  70  is controlled by the second rotation axle  46 ; the cross mandrel  52  is linked up with the rotation axle  43  through the inner pull rod  47  and thereby is synchronically controlled by the handle  41 . Referring simultaneously to FIGS. 5 a ,  5   b , and  5   c , when the dead bolt  60  and the spring-loaded latch bolt  70  are connected with each other, the abutting block  27  of the control device  20  tightly abuts against the engaging edge  16  of the cam-styled axle sleeve  15  to position the cam-styled axle sleeve  15  against moving. Meanwhile, although the protruding post  133  of the rotation axle  13  is connected with the recess  461  on the end of the second rotation axle  46 , it is unable to move the second rotation axle  46 . Concequently no matter clockwise or counterclockwise the handle  11  only swivel the rotation axle  13  but not move the second rotation axle  46 , and thereby the door panel  80  is unable to open.  
         [0028]    Referring simultaneously to FIGS.  6   6   a , and  6   b , the locking member  18  can be a conventional lock with a lock hole for inserting therein of a key, the lock core rod connected on the rear end of the locking member  18  is provided in the middle thereof with the protruding member  19 ; when the key is rotated in the lock hole, the protruding member  19  of the lock core rod is rotated to move the pull rod  30  and move up the abutting block  27  to move forwards the cam-styled axle sleeve  15 ; the square axle hole  17  of the cam-styled axle sleeve  15  is slipped over the second rotation axle  46  to make the rotation axle  13  of the outer lock part  10  and the rotation axle  43  of the inner lock part  40  as an integral whole. When the handle  11  is pressed down, the rotation axle  13 , the cam-styled axle sleeve  15 , the second rotation axle  46 , and the rotation axle  43  are swiveled synchronically. The spring-loaded latch bolt  70  is moved by the second rotation axle  46 , and the protruding post  45  of the rotation axle  43  is linked up to move the inner pull rod  47 . So that the protruding post  50  restrained by the elongate slot  48  and the axle seat  49  linked up with the protruding post  50  are synchronically rotated therewith. The cross mandrel  52  inserted in the cross hole  51  is linked up with the dead bolt  60  which is contracted together with the spring-loaded latch bolt  70  into the door panel  80  to allow easy opening of the door panel  80 . And the indicating disk  53  provided exteriorly of the inner lock part  40  and slipped over the cross hole  51  is rotated too, thereby, a person can be aware by visual viewing of the state of opening/closing.  
         [0029]    The outer lock part  10  and the inner lock part  40  are provided with spring leaves  101 ,  401 , and the rotation axles  13 ,  43  linked up with the handles  11 ,  41  are provided on the exterior peripheries respectively thereof with positioning notches  132 ,  431 . By virtue that the springs  12 ,  42  are respectively provided between the rotation axles  13 ,  43  and the handles  11 ,  41 , the rotation axles  13 ,  43  will be rebounded respectively by the springs  12 ,  42  and are positioned respectively by the positioning notches  132 ,  431  and the spring leaves  101 ,  401  to restore the handles  11 ,  41  to their original positions.  
         [0030]    Referring to FIG. 7, going outdoors needs only to press down the handle  41 . Because the dead bolt  60  and the spring-loaded latch bolt  70  on the door panel  80  are directly controlled by the second rotation axle  46  and the cross mandrel  52  respectively, and these two are synchronically linked up by the rotation axle  43 , the door panel  80  can be opened by pressing down the handle  41 . In any emergency situation such as conflagration or earthquake the door panel  80  can be opened easily as described above.  
         [0031]    To lock the door panel  80  from the outdoors, the locking member  18  is inserted with a key for turning, and the protruding member  19  of the lock core rod is rotated to move the abutting block  27 , and further move forwards the cam-styled axle sleeve  15  to make integral of the rotation axle  13  with the second rotation axle  46 ; then the handle  11  is pulled to swivel to make reversion of the rotation axle  13 , the cam-styled axle sleeve  15 , the second rotation axle  46  and the rotation axle  43  so that the dead bolt  60  can be extended out of the door panel  80  and lock the latter. To lock the door panel  80  from the indoors, it needs only to pull up the handle  41 , such as is shown in FIG. 8, to make reversion of the rotation axle  43  to move the second rotation axle  46  and the cross mandrel  52  to thereby extend the dead bolt  60  out of the door panel  80 .  
         [0032]    The control device  20  of the present invention not only can render the locking member  18  to control raising and lowering of the abutting block  27  manually, but also can be added with an electric circuit board  90  to automatically control the motor  21  to render the screw rod  22  of the motor  21  to move the gear  25 ; the eccentric protruding block  26  of the gear  25  can thereby move the abutting block  27 , so that the cam-styled axle sleeve  15  can be positioned and moved forwards. There are many ways to control the electric circuit board  90 , for example, it can be automatically controlled by an externally connected card reader, code reader or a remote control etc., so that the door can be opened in a more convenient and safer way.  
         [0033]    The locking member  18  of the present invention is provided on one side of the outer lock part  10  and is quite close to the door frame; the distance between the outer lock part  10  and the door frame is less than 2 cm; the key for the locking member  18  is in the shape of “L” to provide theft-proofing because it is hard to be pried with a tool or a master key.  
         [0034]    The door lock with a clutch having a cam-styled axle sleeve of the present invention has the following advantages:  
         [0035]    1. The present invention is provided with a device as a clutch which is composed of a control device and a cam-styled axle sleeve to be able to control integration of rotation axles and in turn to control opening/closing of a door lock practically.  
         [0036]    2. The dead bolt and the spring-loaded latch bolt of the present invention are directly or indirectly linked up with the rotation axle of the inner lock part, so that the handle of the inner lock part can be directly pressed down to open the door in any situation, which help opening the door for fleeing in an emergency.  
         [0037]    3. The inner lock part is provided with an indicating disk to indicate the state of whether the dead bolt is locked with different colors or signs so it is very convenient in awareness the state.  
         [0038]    In conclusion, the door lock with a clutch having a cam-styled axle sleeve of the present invention has a brand-new component arrangement and evidently improved function in relating to the door lock devices used presently.  
         [0039]    All modifications and variations to the invention that would be obvious to a person of ordinary skill in the art are deemed to be within the scope of the present invention the nature of which is to be determined from the above description and the appended claims.