Patent Publication Number: US-2010116006-A1

Title: Strike lock with functions of fail security and fail safety

Description:
FIELD OF THE PRESENT INVENTION 
     The present invention relates to lock, and in particular to a strike lock has functions of fail security and fail safety. 
     BACKGROUND OF THE INVENTION 
     Because of complicated components and manufacturing processes and the high cost of the prior mechanical locks, electrical locks are developed to solve the issues mentioned-above, while the electrical lock still has following disadvantage in usage and manufacturing. 
     1. The prior electrical lock is not suitable for all specification of door width. Various types of electrical lock need to be produced for meeting the various specifications. 
     2. The prior electrical lock usually has only one function of fail security or fail safety. The usage of the lock is thus limited. 
     Thus, the prior electrical lock mentioned above is not a good design and still needs to be improved. 
     Regarding to the disadvantages of the prior electrical lock, the inventor of the present invention spends years and efforts to research and successfully develops an improved structure of the strike lock. 
     SUMMARY OF THE PRESENT INVENTION 
     Accordingly, the primary object of the present invention is to provide a lock with both functions of unlocking the door under power supply period and power off state to select, and through changing a buckle to switch the functions. 
     A secondary object of the present invention is to provide a strike lock suitable for various specifications of door widths. 
     Another object of the present invention is to provide a strike lock with advantages of simple components, easy installation, easy maintenance, long lifetime, and low manufacturing cost. 
     To achieve the above object, the present invention provides a strike lock includes an upper frame, a lower frame, a door position detector, a door position detecting spring, an electromagnetic tube, a detecting switch assembly, a buckle assembly, a press assembly, and a lock assembly. The detecting switching assembly is formed by a door position detecting switch, a substrate, and an electromagnetic tube detecting switch. The buckle assembly is formed by a buckle, a buckling spring, and a straight screw. The press assembly is formed by a positioning plate, a press unit, a pressing spring, and a positioning screw. The lock assembly is formed by a lock, a support unit, and a locking spring. The operation of the strike lock is that the electromagnetic tube moves transversally to push the buckle assembly, when the press assembly can move downwards to buckle the buckle assembly, the locking spring and the lock are free to move so as to have the object of door unlocking. When the press assembly cannot move downwards to buckle the buckle assembly, the locking spring and the lock are locked by the press assembly so as to have the object of door locking. The operation of the strike lock is that when the electromagnetic tube is excited to move the buckle assembly transversally, the press assembly is able to move downwards and the lock is free to move so as to have the object of an electric lock. Through changing the installation direction of the buckle, the function of unlocking the door under power supplying or power off is switched. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is an exploded schematic view of the present invention. 
         FIG. 2  is a solid schematic view of the present invention. 
         FIG. 3  is a schematic view showing the operation of the present invention. 
         FIG. 4  is a schematic view showing the operation of the present invention about unlocking door under power off state. 
         FIG. 5  is a schematic view showing the operation of the electromagnetic tube under power off when the present invention functions in fail safety mode. 
         FIG. 6  is a schematic view showing the operation of the electromagnetic tube under power supplying when the present invention functions in fail safety mode. 
         FIG. 7  is a schematic view showing the operation of the present invention about fail security mode. 
         FIG. 8  is a schematic view showing the operation of the electromagnetic tube under power off when the present invention functions in fail security mode. 
         FIG. 9  is a schematic view showing the operation of the electromagnetic tube under power supplying when the present invention functions in fail security mode. 
         FIG. 10  is a schematic view showing the assembly of the present invention. 
         FIG. 11  is a schematic view showing an embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     In order that those skilled in the art can further understand the present invention, a description will be provided in the following in details. However, these descriptions and the appended drawings are only used to cause those skilled in the art to understand the objects, features, and characteristics of the present invention, but not to be used to confine the scope and spirit of the present invention defined in the appended claims. 
     With reference to  FIG. 1 , an exploded schematic view of a strike lock according to the present invention is illustrated. From the drawing, it is known that the strike lock  100  is formed by an upper frame  1 , a lower frame  7 , a door position detector  2 , a door position detecting spring  21 , an electromagnetic tube  3 , a detecting switch assembly  31 , a buckle assembly  4 , a press assembly  5 , and a lock assembly  6 . 
     The detecting switching assembly  311  is formed by a door position detecting switch  311 , a substrate  312 , and an electromagnetic tube detecting switch  313 . The buckle assembly  4  is formed by a buckle  41 , a buckling spring  42 , and a straight screw  43 . The press assembly  5  is formed by a positioning plate  54 , a press unit  51 , a pressing spring  52 , and a positioning screw  53 . The lock assembly  6  is formed by a lock  61 , a support unit  62 , and a locking spring  63 . 
     The operation of the present invention is that when the electromagnetic tube  3  moves transversally to push the buckle assembly  4 , and then the press assembly  5  moves downwards to buckle the buckle assembly  4 , the locking spring  63  and the lock  61  are free to move so as to have the object of door unlocking. When the press assembly  5  cannot move downwards to buckle the buckle assembly  4 , the locking spring  63  and the lock  61  are locked by the press assembly  5  so as to have the object of door locking. The electromagnetic tube detecting switch  313  of the detecting switch assembly  31  serves to detect whether the electromagnetic tube  3  moves. The door position detecting switch  311  of the detecting assembly  31  detects whether the door is closed by detecting the motions of the door position detector  2  and the door position detecting spring  21 . Thus the strike lock according to the present invention is illustrated. 
     With reference to  FIG. 2 , a perspective view of the strike lock according to the present invention is illustrated. From the drawing, it is known that the strike lock is formed by the upper frame  1 , the lower frame  7 , the door position detector  2 , the buckle assembly  4 , and the lock  61 . 
     With reference to  FIG. 3 , a schematic view showing the operation of the present invention is illustrated. From the drawing, it is known that the strike lock is formed by the detecting switch assembly  31 , the electromagnetic tube  3 , the buckle assembly  4 , the press assembly  5 , the lock assembly  6 , the door position detector  2 , and the door position detecting spring  21 . The detecting switching assembly  31  is formed by the door position detecting switch  311 , the substrate  312 , and the electromagnetic tube detecting switch  313 . The operation of the present invention is that the electromagnetic tube  3  moves transversally to push the buckle assembly  4  which is formed by the buckle  41 , the buckling spring  42 , and the straight screw  43 . The press assembly  5  is formed by a positioning plate  54 , a press unit  51 , a pressing spring  52 , and a positioning screw  53 . When the press assembly  5  moves downwards to buckle the buckle assembly  4 , the locking spring  63 , the support unit  62  and the lock  61  are free to move so as to have the object of door unlocking. When the press assembly  5  cannot move downwards to buckle the buckle assembly  4 , the locking spring  63 , the support unit  62  and the lock  61  are locked by the press assembly  5  so as to have the object of door locking. The operation of the present invention is that when the electromagnetic tube  3  is excited to push the buckle assembly  4 , the press assembly  5  can move downwards to buckle the buckle  41 , thus the lock  61 , the support unit  62 , and the locking spring  63  are free to move so as to have the object of an electric lock. 
     With reference to  FIG. 4 , a schematic view showing the operation of the present invention about door unlocking under power off state is illustrated. Furthermore, with reference to  FIGS. 5 and 6 , the schematic views showing the operations of the electromagnetic tube  3  under power supplying and power off are illustrated. The electromagnetic tube  3  will not move during power off state, thus the press unit  51  can be pressed downwards by the lock  61  and the locking spring  63  to buckle the buckle  41  so as to have the object of door unlocking. After power is supplied to the electromagnetic tube  3 , the electromagnetic tube  3  will move toward the buckle  41  to push the buckle  41  to a predetermined position, thus the press unit  51  can not be pushed downwards by the lock  61  to buckle the buckle  41  so as to have the object of locking the door. The buckle  41  is pushed by the buckling spring  42  to restore the position when power is off. Therefore, the object of door locking under power supplying and unlocking door under power off state is achieved. 
     The electromagnetic tube detecting switch  313  of the detecting switch assembly  31  serves to detect whether the electromagnetic tube  3  moves. While the door position detecting switch  311  of the detecting switch assembly  31  detects whether the door is closed by detecting the motions of the door position detector  2  and the door position detecting spring  21 . 
     With reference to  FIG. 7 , a schematic view showing the operation of the present invention about door opening under power supplying is illustrated. Furthermore, with reference to  FIGS. 8 and 9 , the schematic views showing the operations of the electromagnetic tube  3  under power supplying and power off are illustrated. When power is supplied to the electromagnetic tube  3 , the electromagnetic tube  3  will move toward the buckle  41  to push the buckle  41  to a predetermined position, thus the press unit  51  can be pressed downwards by the lock  61  and the locking spring  63  to buckle the buckle  41  so as to have the object of door unlocking. Wherein, the buckle  41  is pushed by the buckling spring  42  to restore the position when power is off. While the electromagnetic tube  3  will be pushed back by the buckle  41  during power off state, thus the press unit  51  cannot be pressed downwards by the lock  61  to buckle the buckle  41 . The lock  61  is locked by the press unit  51  so as to have the object of door locking. Therefore, the object of door unlocking under power supplying and door locking under power off state is achieved. 
     To switch the function of unlocking door between power supplying or power off state, it is only needed to change the installation direction of the buckle  41 . 
     The electromagnetic tube detecting switch  313  of the detecting switch assembly  31  serves to detect whether the electromagnetic tube  3  moves. While the door position detecting switch  311  of the detecting switch assembly  31  detects whether the door is closed by detecting the motions of the door position detector  2  and the door position detecting spring  21 . 
     With reference to  FIG. 10 , a schematic view showing the assembly of the present invention is illustrated. The strike lock  100  of the present invention is assembled by the upper frame  1  and the lower frame  7  through screwed by unscrew-proof bolts  11 . The internal structure of the present invention is formed by the door position detector  2 , the door position detecting spring  21 , the buckle assembly  4 , the press assembly  5  which includes the press unit  51 , the pressing spring  52 , the positioning screw  53  and the positioning plate  54 , and the lock  61 . 
     With reference to  FIG. 11 , a schematic view showing an embodiment of the present invention is illustrated. The strike lock  100  is buckled by a door lock  9  when a door  8  is closed. The door lock  9  will pass through the lock  61  and press the door position detector  2 , and an end of the door position detector  2  will press the door position detecting switch  311  for detecting whether the door is closed. 
     For revealing the improvement and practicability of the present invention, an analysis of the present invention comparing with the prior electric lock which is also the advantage of the present invention is listed in the following. 
     1. The strike lock of the present invention is suitable for various specifications of door width. 
     2. The strike lock of the present invention has functions of unlocking door under power supplying and power off state, and is capable of being switched between the functions by modifying the buckle. 
     3. The strike lock of the present invention has advantages of simple components, easy installation, easy maintenance, long lifetime, and low manufacturing cost. 
     The present invention is thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the present invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.