Abstract:
A lock core includes a lock core base, a button, a cover, a connecting member, a bayonet base, a bayonet and two compression springs. It can be applied in diverse locks, such as a transmission lock, a door lock or a safe deposit lock etc, able to achieve an excellent anti-theft effect because it is installed invisibly, locked by just pressing a button and opened without a key and with a remote controller.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    This invention relates to a lock core, particularly to one installed invisibly in all kinds of locks with an excellent anti-theft effect. 
         [0003]    2. Description of the Prior Art 
         [0004]    Commonly, a conventional lock core is provided with a keyhole for a key to insert to lock or unlock the lock core. The lock core is provided with plural bayonets extended in the keyhole with diverse lengths, which are exactly engaged with grooves shaped around the key, so that the bayonets can push the lock core to rotate when the key is inserted and rotated in the keyhole, keeping other linked transmitting mechanisms moved to lock or unlock the lock core. But, such a lock core is actually not difficult to be unlocked by inserting an alternative pin, instead of the key, to push the bayonets. So, it is not a safe anti-theft lock. 
       SUMMARY OF THE INVENTION 
       [0005]    The objective of this invention is to offer a lock core installed invisibly in a lock. 
         [0006]    The main characteristics of the invention are a lock core base, a button, a cover, a connecting member, a bayonet base, a bayonet and two compression springs. The lock core base is provided with a chamber, a through hole bored in its one end to communicate with the chamber, an annular blocking surface formed at the boundary between the chamber and the through hole, and a threaded hole bored in its annular wall to communicate with the chamber. The button set in the lock core base is provided with a locking groove and a dead bolt member extended out from its one end. One of the compression springs is mounted around the dead bolt member, installed in the chamber. The cover installed at one end of the lock core base is provided with a through hole for the dead bolt member of the button to pass through. The connecting member is installed in the annular wall of the lock core base, provided with a through hole. The bayonet base connected with the connecting member is provided with a chamber and a through hole bored in its one end to communicate with the chamber. The bayonet inserted in the bayonet base is provided with a blocking flange and a connecting rod extended out from the blocking rim. The other compression spring is mounted around the connecting rod of the bayonet, installed in the chamber of the bayonet base. 
     
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         [0007]    This invention is better understood by referring to the accompanying drawings, wherein: 
           [0008]      FIG. 1  is an exploded perspective view of a preferred embodiment of a lock core in the present invention; 
           [0009]      FIG. 2  is a perspective view of the preferred embodiment of a lock core in the present invention; 
           [0010]      FIG. 3  is a cross-sectional view of the preferred embodiment of a lock core in the present invention; 
           [0011]      FIG. 4  is a perspective view of a transmission, showing it being installed with the preferred embodiment of the present invention; 
           [0012]      FIG. 5  is a cross-sectional view of the transmission installed with the preferred embodiment of the present invention, showing it being unlocked by the invention; 
           [0013]      FIG. 6  is a cross-sectional view of the transmission installed with the preferred embodiment of the present invention, showing it being locked by the invention; 
           [0014]      FIG. 7  is a perspective view of a door lock, showing it being installed with the preferred embodiment of the present invention; 
           [0015]      FIG. 8  is a cross-sectional view of the door lock installed with the preferred embodiment of the present invention, showing it being unlocked by the invention; 
           [0016]      FIG. 9  is a cross-sectional view of the door lock installed with the preferred embodiment of the present invention, showing it being locked by the invention; and 
           [0017]      FIG. 10  is a perspective view of a safe deposit lock, showing it being installed with the preferred embodiment of present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
       [0018]    As shown in  FIG. 1 , a preferred embodiment of a lock core in the present invention is composed of a lock core base  1 , a button  2 , a cover  3 , a connecting member  4 , a bayonet base  5 , a bayonet  53  and two compression springs  23  and  56 . 
         [0019]    The lock core base  1  is provided with a chamber  10 , a through hole  11  bored in its one end to communicate with the chamber  10 , an annular blocking surface  12  formed at the boundary between the chamber  10  and the through hole  11 , female threads  13  formed at the other end of the chamber  10 , and a threaded hole  14  bored in its annular wall to communicate with the chamber  10 . 
         [0020]    The button  2  is set in the lock core base  1 , provided with a locking groove  20 , an annular slot  21  formed in its one side, a dead bolt member  22  extended out from the annular slot  21 . The compression spring  23  is mounted around the dead bolt member  22 , installed in the chamber  10 . 
         [0021]    The cover  3  installed at one end of the lock core base  1  is provided with male threads  30 , an annular slot  31  formed at its one side, and a through hole  32  bored in its center. 
         [0022]    The connecting member  4  is installed in the annular wall of the lock core base  1 , provided with upper male threads  40 , lower male threads  41  and a through hole  42  opened through its center. 
         [0023]    The bayonet base  5  connected with the connecting member  4  is provided with a chamber  50 , a through hole  51  bored in its one end to communicate with the chamber  50 , and female threads  52  formed at the other end. The bayonet  53  inserted in the chamber  50  is provided with a blocking flange  54  located near its intermediate portion, a connecting rod  55  extended out from the blocking flange  54 . The compression spring  56  is mounted around the bayonet  53 , installed in the chamber  50 . 
         [0024]    In assembly, as shown in  FIGS. 1-3 , the button  2  is first installed in the chamber  10  of the lock core base  1 , keeping its one end fitted in the through hole  11  of the lock core base  1 . Next, put the compression spring  23  on the dead bolt  22 , keeping one end of the compression spring  23  fitted in the annular slot  21 . The cover  3  is successively put on the compression spring  23  to keep the male threads  30  screwed with the female threads  13  of the lock core base  1 , so that the cover  3  is fixed together with one side of the lock core base  1 , enabling the dead bolt member  22  of the button  2  installed in the chamber  10  to extend out through the through hole  32  of the cover  3 , and the other end of the compression spring  23  is to be fitted in the annular slot  31  of the cover  3 . By the time, the button  2  is pushed by the compression spring  23  to keep its end surface positioned in a same plane of the end of the lock core base  1 . Then, the connecting member  4  is connected with the lock core base  1  via screwing the lower male threads  41  in the threaded hole  14  of the lock core base  1 . The compression spring  56  is mounted around the connecting rod  55 . Next, put the bayonet  53 , the connecting rod  55  and the compression spring  56  into the chamber  50  of the bayonet base  5 , keeping the connecting rod  55  extended out through the through hole  51  of the bayonet base  5  and the female threads  52  screwed with the upper male threads  40  of the connecting member  4 , so that the bayonet base  5  is fixed with the connecting member  4 . By the time, the bayonet  53  is inserted through the through hole  42  of the connecting member  4 . That is a complete assembly of the lock core. 
         [0025]    In application, as shown in  FIGS. 4 - 6 , the invention can be employed to lock or unlock a transmission  6 . When transmission  6  is to be locked, a user needs just to press the button  2  to keep the dead bolt member  22  moved into a passageway  61  of the transmission  6 . By the time, the compression spring  23  is compressed and the locking groove  20  is moved to a position exactly corresponding to the bayonet  53 , which is synchronously forced by the elasticity of the compression spring  56  to move into the locking groove  20 , keeping the button  2  positioned and the dead bolt member  22  extended into the passageway  61  to restrict a gear lever  60  of the transmission  6  from moving away from the parking gear, as shown in  FIG. 6 . Therefore, the transmission  6  is locked, unable to be operated. When the transmission  6  is to be unlocked, a user can use a remote controller to enable an electric magnet  62  in the transmission  6  magnetized to attract a magnetic plate  63  connected with the end of the connecting rod  55 , as shown in  FIG. 5 . While the magnetic plate  63  is being attracted by the electric magnet  62 , the bayonet  53  is to be synchronously moved to come off the locking groove  20 . The compression spring  23  in the chamber  10  of the lock core base  1  is to elastically push the  2  out as soon as the bayonet  53  moves away the locking groove  20  completely, spontaneously enabling the dead bolt member  22  to move away from the passageway  61  of the transmission  6 , keeping the gear lever  60  unrestricted. So, the transmission  6  can be operated again. With the lock core of the invention hidden in the transmission  6  and unlocked without a key, a thief cannot easily break it. 
         [0026]    As shown in  FIGS. 7-9 , the invention can be also applied in a door lock  70  installed in a door  7 . A control box  72  is set on the inside of a door frame  71  to face exactly to the door lock  70 , installed with a mechanism  73  inside it to drive a dead bolt  74  to act. The dead bolt  74  is bored with a hole  75 . In using, a remote controller is used to control the control mechanism  73  in the control box  72  to push the dead bolt  74  outward to pass into the door lock through an opening  76 , keeping the hole  75  positioned to face to the dead bolt member  22  rightly. Next, press the button  2  to enter the hole  75  of the locking bolt  74 , as shown in  FIG. 9 . By the time, the compression spring  23  is compressed and the locking groove  20  is moved inward to a position exactly corresponding to the bayonet  53 , which is synchronously forced by the elasticity of the compression spring  56  to move into the locking groove  20 , keeping the button  2  positioned and the dead bolt member  22  extended into the hole  75  of the dead bolt  74  to keep the dead bolt  74  restricted immovably. So, the door  7  is locked unable to be opened. When the door lock  70  is to be unlocked, a user can also use a remote controller to enable an electric magnet  77  in the door lock  70  magnetized to attract a magnetic plate  78  connected with the end of the connecting rod  55 , as shown in  FIG. 8 . While the magnetic plate  77  is being attracted by the electric magnet  78 , the bayonet  53  is to be synchronously moved off the locking groove  20 . The compression spring  23  in the chamber  10  of the lock core base  1  is to elastically push the button  2  out as soon as the bayonet  53  moves away the locking groove  20  completely, spontaneously enabling the dead bolt member  22  to move away from the hole  75  of the dead bolt  74 , keeping the dead bolt  74  unrestricted. And, by means of the control mechanism  73  installed in the control box  72 , the dead bolt  74  is pulled back in the control box  72 , then the door lock  70  is unlocked. With the lock core of the invention hidden in the door lock and unlocked without a key, a thief cannot easily break it, too. 
         [0027]    In addition, as shown in  FIG. 10 , the invention can be applied in a safe deposit  8 , installed and operated the same way as the previous embodiment is. 
         [0028]    While the preferred embodiment of the invention has been described above, it will be recognized and understood that various modifications may be made therein and the appended claims are intended to cover all such modifications that may fall within the spirit and scope of the invention.