Patent Publication Number: US-2023137238-A1

Title: Control Structure of Door Lock

Description:
FIELD OF THE INVENTION 
     The present invention relates to a control structure of a door lock which actuates the head to extend outward or retract inward to lock or unlock the two screw bolts by way of the guider, the clutch assembly and the resilient element. 
     BACKGROUND OF THE INVENTION 
     A conventional door lock contains a first connection part and a second connection part which is connected with the first connection part. However, the door lock is operated poorly and deforms easily after a period of using time. 
     The present invention has arisen to mitigate and/or obviate the afore-described disadvantages. 
     SUMMARY OF THE INVENTION 
     The primary aspect of the present invention is to provide a control structure of a door lock which actuates the head to extend outward or retract inward to lock or unlock the two screw bolts by way of the guider, the clutch assembly and the resilient element. 
     To achieve above-mentioned aspect, a control structure of a door lock provided by the present invention contains: a body, a slide plate, a clutch assembly, a head, a clutch assembly, and a guider. 
     The body includes a chamber defined in the body, a receiving groove formed in the chamber, a motor partially accommodated in the receiving groove, a drive gear fixed on a front end of the drive motor, a trench defined on a predetermined position of the body and corresponding to the receiving groove, and a resilient element retained in the trench. 
     The slide plate is accommodated in the body and includes a holder formed on a first end of the slide plate, a trough defined on the holder and configured to receive a rotation element, a lever extending from a top of the rotation element, received in the trough, and configured to drive the slide plate to move with respect to the body, a lock cylinder extending from the rotation element into the body, and a first connection orifice defined on a second end of the slide plate. 
     The clutch assembly is hollow, received in the slide plate and located beside the motor. The clutch assembly includes a first annular ring, a second annular ring, and a third annular ring. The first annular ring has two notches defined on a top and a bottom thereof, two wings extending from two sides of the first annular ring to the second annular ring, and a toothed portion formed around an inner wall of the first annular ring and meshing with the drive gear of the motor. 
     The second annular ring is located beside the first annular ring, and the second annular ring includes two first cutouts defined on a top and a bottom of the second annular ring, two second cutouts formed on two sides of the second annular ring, two recessed portions defined on the second cutouts and facing the first annular ring so as to engage with the two wings. 
     The third annular ring is located beside the second annular element and abuts against the resilient element. The third annular ring includes two actuation portions extending to the second annular element and engaged with the two first cutouts of the second annular ring and the first annular ring. 
     The head includes a defining groove formed on a side of the head, and the head includes a second connection orifice communicating with the defining groove and configured to partially receive the first end of the slide plate. The second connection orifice is aligned with the first connection orifice so that a coupling element is screwed with the first connection orifice and the second connection orifice to fix the head on the first end of slide plate, and the head further includes two bosses formed on two predetermined positions of an outer wall thereof. 
     The guider rotatably is fixed in the chamber of the body and includes a space defined in the guider so as to guide the head to move into or remove from the guider, and the guider includes at least two spiral indentations formed on an outer wall of the guider. The at least two spiral indentations are in communication with the space and are configured to movably engage with the two bosses, such that when the head moves forward or backward, the two bosses drive the two spiral indentations of the guider to rotate clockwise or counterclockwise, and the guider further includes two extensions engaged with the two recessed portions of the second annular ring. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a perspective view showing the operation of a control structure of a door lock according to a preferred embodiment of the present invention. 
         FIG.  2    is another perspective view showing the operation of the control structure of the door lock according to the preferred embodiment of the present invention. 
         FIG.  3    is also another perspective view showing the operation of the control structure of the door lock according to the preferred embodiment of the present invention. 
         FIG.  4    is still another perspective view showing the operation of the control structure of the door lock according to the preferred embodiment of the present invention. 
         FIG.  5    is a perspective view showing the exploded components of the control structure of the door lock according to the preferred embodiment of the present invention. 
         FIG.  6    is a perspective view showing the exploded components of a part of the control structure of the door lock according to the preferred embodiment of the present invention. 
         FIG.  7    is a perspective view showing the assembly of a part of the control structure of the door lock according to the preferred embodiment of the present invention. 
         FIG.  8    is a cross-sectional perspective view showing the operation of the control structure of the door lock according to the preferred embodiment of the present invention. 
         FIG.  9    is a cross sectional view showing the assembly of the control structure of the door lock according to the preferred embodiment of the present invention. 
         FIG.  10    is a cross sectional view taken along the line A-A of  FIG.  9   . 
         FIG.  11    is a cross sectional view taken along the line B-B of  FIG.  9   . 
         FIG.  12    is a cross sectional view taken along the line C-C of  FIG.  9   . 
         FIG.  13    is a cross sectional view taken along the line D-D of  FIG.  9   . 
         FIG.  14    is a cross sectional view showing the operation of the control structure of the door lock according to the preferred embodiment of the present invention. 
         FIG.  15    is a cross sectional view taken along the line E-E of  FIG.  14   . 
         FIG.  16    is a cross sectional view taken along the line F-F of  FIG.  14   . 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     With reference to  FIGS.  1 - 16   , a control structure of a door lock according to a preferred embodiment of the present invention comprises 
     a body  10  including a chamber  11  defined in the body  10 , a receiving groove  12  formed in the chamber  11 , a motor  13  partially accommodated in the receiving groove  12 , a drive gear  14  fixed on a front end of the drive motor  13 , a trench  113  defined on a predetermined position of the body  10  and corresponding to the receiving groove  12 , a resilient element  15  retained in the trench  113 ; wherein the body  10  further includes a cap  16  mounted on a rear end of the body  10 , two locking orifices  18  defined on two sides of the cap  16 , two screw bolts  19  screwed with the two locking orifices  18 , two threaded orifices  112  formed on the body  10  and corresponding to the two locking orifices  18  so that the two screw bolts  19  are screwed with the two threaded orifices  112  and the two locking orifices  18 , and a guide slot  17  defined on a top of the cap  16  and configured to guide a holder  22  of a slide plate  20 ; 
     the slide plate  20  accommodated in the body  10  and including the holder  22  formed on a first end of the slide plate  20 , a trough  23  defined on the holder  22  and configured to receive a rotation element  24 , a lever  26  extending from a top of the rotation element  24 , received in the trough  23 , and configured to drive the slide plate  20  to move with respect to the body  10 , a lock cylinder  25  extending from the rotation element  24  into the body  10 , and a first connection orifice  21  defined on a second end of the slide plate  20 ; 
     a clutch assembly  30  being hollow, received in the slide plate  20  and located beside the motor  13 , the clutch assembly  30  including a first annular ring  31 , a second annular ring  35 , and a third annular ring  39 , wherein the first annular ring  31  has two notches  32  defined on a top and a bottom thereof, two wings  34  extending from two sides of the first annular ring  31  to the second annular ring  35 , a toothed portion  33  formed around an inner wall of the first annular ring  31  and meshing with the drive gear  14  of the motor  13 ; 
     the second annular ring  35  located beside the first annular ring  31 , and the second annular ring  35  including two first cutouts  38  defined on a top and a bottom of the second annular ring  35 , two second cutouts  36  formed on two sides of the second annular ring  35 , two recessed portions  37  defined on the second cutouts  36  and facing the first annular ring  35  so as to engage with the two wings  34 ; 
     the third annular ring  39  located beside the second annular element  35  and abutting against the resilient element  15 , the third annular ring  39  including two actuation portions  391  extending to the second annular element  35  and engaged with the two first cutouts  38  of the second annular ring  35  and the first annular ring  31 ; 
     a head  40  including a defining groove  41  formed on a side of the head  40 , a second connection orifice  42  communicating with the defining groove  41  and configured to partially receive the first end of the slide plate  20 , wherein the second connection orifice  42  is aligned with the first connection orifice  21  so that a coupling element  27  is screwed with the first connection orifice  21  and the second connection orifice  42  to fix the head  40  on the first end of slide plate  20 , wherein the head  40  further includes two bosses  43  formed on two predetermined positions of an outer wall thereof; 
     a guider  50  rotatably fixed in the chamber  11  of the body  10  and includes a space  54  defined in the guider  50  so as to guide the head  40  to move into or remove from the guider  50 , at least two spiral indentations  51  formed on an outer wall of the guider  50 , wherein a respective spiral indentation  51  has a first positioning segment  511  and a second positioning segment  512  and is in communication with the space  54 , wherein the two spiral indentations  51  are configured to movably engage with the two bosses  43 , such that when the head  40  moves forward or backward, the two bosses  43  drive the two spiral indentations  51  of the guider  50  to rotate clockwise or counterclockwise, and the guider  50  further includes two extensions  53  engaged with the two recessed portions  37  of the second annular ring  35 ; wherein the body  10  further includes two retainers  111  formed on the front end thereof and configured to engage with two engagement portions  62  of a stop sheet  60 , and the stop sheet  60  includes an accommodation aperture  61  in which the head  40  moves. When the door lock is unlocked manually, the lock cylinder  25  is rotated to drive the lever  26  to actuate the trough  26  so that the slide plate  20  drives the head  40  to move backward, and the two bosses  43  actuate the two spiral indentations  51  of the guider  50  to rotate clockwise from the first positioning segment  511  to the second positioning segment  512 , in the meantime, the two extensions  53  drive the second cutouts  36  of the second annular ring  35  to revolve, and the two first cutouts  38  of the second annular ring  35  drive the two actuation portions  391  of the third annular ring  39  and the two notches  32  of the first annular ring  31  to rotate clockwise. Since the third annular ring  39  abuts against the resilient element  15 , the head  40  moves into the space  54  of the guider  50  when the third annular ring  39  rotates to press the resilient element  15  to revolve, thus unlocking the door lock. As desiring to lock the door lock manually, the clutch assembly  30  is pushed by the resilient element  15  to move back to an original position so that the second cutouts  36  of the second annular ring  35  actuate the two extensions  53  of the guider  50  to rotate counterclockwise, and the two bosses  43  of the head  40  are actuated by the two spiral indentations  51  of the guider  50  to revolve so that the head  40  moves into the two locking orifices  18  from the space  54 , thus locking the door lock. 
     When desiring to unlock the door lock electrically, the motor  13  is driven by the drive gear  14  to actuate the toothed portion  33  of the first annular ring  31  to rotate clockwise, and the two wings  34  of the first annular ring  31  drive the two recessed portions  37  of the second annular ring  35  to rotate the second annular ring  35  clockwise, wherein the second cutouts  36  actuate the guider  50  and the two extensions  53  to revolve clockwise. When the guider  50  rotates clockwise, the two spiral indentations  51  of the guider  50  drive the two bosses  43  of the head  40  to move into the second positioning segment  512  from the first positioning segment  511 , in the meantime, the head  40  moves into the space  54  of the guider  50 , thus unlocking the door lock. When locking the door lock electrically, the motor  13  is driven by the drive gear  14  to actuate the toothed portion  33  of the first annular ring  31  to revolve counterclockwise, and the two wings  34  of the first annular ring  31  drive the two recessed portions  37  of the second annular ring  35  to rotate the second annular ring  35  counterclockwise, such that the second cutouts  36  of the second annular  35  actuate the guider  50  and the two extensions  53  to revolve counterclockwise. When the guider  50  revolves counterclockwise, the two spiral indentations  51  of the guider  50  drive the two bosses  43  of the head  40  to move into the first positioning segment  511  from the second positioning segment  512 , and the head  40  moves into the two locking orifices  18  from the space  54 , thus locking the door lock. 
     Thereby, the control structure of the door lock actuates the head  40  to extend outward or retract inward to lock or unlock the two screw bolts  19  by way of the guider  50 , the clutch assembly  30 , and the resilient element  15 . Preferably, the body  10  is one-piece formed to accommodate the head  40  securely and to avoid deformation of the two screw bolts  19 . 
     While the preferred embodiments of the invention have been set forth for the purpose of disclosure, modifications of the disclosed embodiments of the invention and other embodiments thereof may occur to those skilled in the art. Accordingly, the appended claims are intended to cover all embodiments which do not depart from the spirit and scope of the invention.