Patent Abstract:
Problems of the Invention:  
     It is to provide an electric cylinder for actuating a door lock which may be easily attached to the existing door lock to prevent picking completely, and an electric cylinder door lock not having a keyhole.  
     Means for Solving the Problems:  
     The electric cylinder for actuating a door lock of this invention is characterized in that a motor shaft is displaced by the operation of a motor to associate a rotary can with a disc, one end of said motor shaft is accommodated in a hole portion which is formed in the bottom of the case, all electric cylinder parts are accommodated in the case, said rotary can is divided into two upper and lower parts which are always associated each other, said disc is put displaceably with a spring in the case, the pole of said motor is changed to extend and contract said motor shaft, and the tailpiece is associated with the operation of the extension and contraction to actuate a dead bolt.

Full Description:
BACKGROUND OF THE INVENTION  
         [0001]    1. Field of the Invention  
           [0002]    This invention relates to an electric cylinder for actuating a door lock which can attach to the existing lock for opening and shutting the door.  
           [0003]    2. Description of Related Art  
           [0004]    The existing lock for opening and shutting the door is generally designed to use a key so that if the key has been carried and lost or is missing, picking permits the lock to be unlocked by inserting a special tool or a picking tool into the keyhole of the lock. If a lock without a keyhole is attached to the door, additional equipment which has high reparation costs is required.  
           [0005]    Recently, a lock structure is proposed to prevent unlawful unlocking without using a proper key, for example, as disclosed in JP-A-2002-276215, however these locks must be provided on the door when it is built, or the door must be reconstructed.  
         SUMMARY OF THE INVENTION  
         [0006]    Problem to be Solved by the Invention:  
           [0007]    It has been desired that the picking can be completely prevented by detaching the existing door lock and attaching the electric cylinder for receiving an electric signal to the door lock so as to attach easily to the existing door lock the electric cylinder which permits code operation or remote operation for sending the electric signal.  
           [0008]    It is an object of this invention to provide an electric cylinder for actuating a door lock which may be easily attached to the existing door lock to prevent the picking completely, and an electric cylinder door lock not having a keyhole.  
           [0009]    Means for Solving the Problems:  
           [0010]    The electric cylinder for actuating a door lock of this invention is characterized in that a motor shaft is displaced by the operation of a motor to associate a rotary can with a disc, one end of said motor shaft is accommodated in a hole portion which is formed in the bottom of the case, all electric cylinder parts are accommodated in the case, said rotary can is divided into two upper and lower parts which are always associated with each other, said disc is put displaceably with a spring in the case, the electrode of said motor is changed to extend and contract said motor shaft, and the tailpiece is associated with the operation of the extension and contraction to actuate a dead bolt.  
           [0011]    According to the electric cylinder for the door lock of this invention, it is to provide considerably a convenient electric cylinder which may be easily attached to the existing door lock so as to use a telephone, to provide the remote operation from one&#39;s room of house or apartment, or to provide a locking and unlocking lock which may be operated with a fingerprint and a tenkey.  
           [0012]    According to the electric cylinder for the door lock of this invention, wiring cables of a motor for extending and contracting the shaft, or a stepping motor are disposed at the position regardless of the rotation of the rotary dish plate, so that the cylinder may be rotated at an angle of more than 360° to correspond to foreign locks such as European locks and the like.  
           [0013]    The electric cylinder for the door lock of this invention is characterized in that the electric cylinder may be easily attached to the existing door lock by clamping bolts from the front side of the existing door to provide the electric cylinder door locks not having a keyhole. 
       
    
    
     SIMPLE DESCRIPTION OF DRAWINGS  
       [0014]    [0014]FIG. 1 shows the whole exploded view of the electric cylinder;  
         [0015]    [0015]FIG. 2 shows a perspective view where all parts of the electric cylinder are accommodated in the case to be assembled and associated with the dead bolt of the existing door;  
         [0016]    [0016]FIG. 3 shows a plan view where the electric cylinder is set to the existing door opening and shutting lock;  
         [0017]    [0017]FIG. 4 shows a partial perspective view of upper and lower rotary can parts for the motor provided with a screwed shaft; and  
         [0018]    [0018]FIG. 5 shows a partial perspective view of the whole exploded electric cylinder provided with a motor and a rotary dish plate to rotate the electric cylinder at an angle of more than 360 degrees. 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0019]    The preferred embodiments of the invention will be illustrated hereinafter with reference to the accompanying drawings.  
         [0020]    [0020]FIG. 1 shows the exploded parts of the whole of the electric cylinder in the perspective view. The electric cylinder mechanism is illustrated in the exploded perspective view. Plural stand poles  2  along which springs  3  are winded, are fixed to the bottom of a case  1 . A disc  4  is secured to the plural poles  2  by rings  5  when the plural poles  2  are passed through holes  18  of the disc  4 . A hollow pole  30  provided with the bottom of the case  1  is inserted into a central hole  32  of the disc  4 .  
         [0021]    A shaft  9  associated with a motor  8  is inserted in a central hole  28  of the bottom of a lower rotary can part  6 , and when the lower rotary can part  6  and the motor  8  are connected by stop rings  34  and  35  set in two grooves  33  notched on the shaft  9 , the shaft  9  is entered in a hole  31  of the central hole  30  provided on the bottom of the case  1  to arrange the motor  8  and the case  1  in a linear relation. This motor  8  is a stepping motor which can extend and contract the shaft  9  in the arrow directions  50  and  45 .  
         [0022]    The motor  8  is integrated with a stationary can  15 . The cables  39  and  40  are drawn from holes  17  of the stationary can  15  through the cable through grooves of a projected portion. The motor  8  is clamped by a stationary metal fitting  10  and attached to the stationary can  15  by bolts  11 . An upper rotary can part  13  is integrated through a cylinder part  38  with a tailpiece  14  which is associated with a dead bolt for a door lock. The upper rotary can part  13  is secured to the stationary can  15  by clamping a ring to a groove formed on the cylinder part  38  to pass the tailpiece  14  through a central hole  16  opened in the stationary can  15 .  
         [0023]    The stationary can  15  integrated with the upper rotary can part  13  by a clamping ring  20  is pushed by means of a ring plate  55  and accommodated in the case  1 , because bolts  22  are secured through the hole of the ring plate  55  into screwed holes  27  of the case  1 . Then, the ring plate  55  is set on a step face  37  of the stationary can  15  to be completely integrated with the case  1 . The stationary can  15  of the integrated electric cylinder is passed through a central hole  53  of a decorative seat block  25  and integrated with the decorative seat block  25  to contact the surface  41  of the decorative seat block  25  with the door surface. An inner case  21  for a door lock is attached to the stationary can  15  by inserting bolts  13  through a dead bolt  24  for the door lock into the screwed holes  36  of the stationary can  15 .  
         [0024]    The electric operation will be illustrated with reference to the accompanying drawings; the two cables  39  and  40  for a power source are used in the motor  8 . When the positive electrode is connected to the cable  39  and the negative electrode is applied to the cable  40 , the shaft associated with the motor  8  is displaced in the direction of the arrow  50  to push the rotary lower can part  6  associated with the shaft  9  to enter a projection  7  integrated with the rotary lower can part  6  into a number of holes  26  opened on the disc  4  accommodated in the case  1 .  
         [0025]    At this state, when the case is turned by hand, the rotary lower and upper can parts  6  and  13  are associated with each other and turned together through groove faces  42  to transmit a turning movement to the tailpiece  14 , so that the dead bolt  24  is actuated to provide an unlocking state. However, when the dead bolt  24  is contacted to a socket of the door (not shown), the dead bolt  24  is not actuated to the normal position. In this case, as the cylinder case  1  is continued to turn by hand, springs  3  are contracted, and when a further constant power is applied to the engaging portions, or projections  7  of the rotary can part  6  and holes  26  of the disc  4 , the projections  7  are detached from the holes  26  because at least one of the projection  7  and the hole  26  is provided with the inclined angle, so that the cylinder case  1  is turned by hand force to generate a clicking sound (click-clack).  
         [0026]    When one cable  39  is connected to the negative electrode and the other cable  40  is connected to the positive electrode, the shaft  9  of the motor  8  is returned in the arrow direction  45  to detach the rotary lower can part  6  from the disc  4  so as to permit them both to be unassociated. The spring  3  is functioned to escape the pushing movement because the disc  4  is pushed toward the bottom of the case if the rotary lower can part  6  may be badly engaged with the disc while the shaft is displaced in the arrow direction  50 . Moreover, during locking, plural holes  26  opened on the disc  4  are not engaged and connected with the projections  7  integrated with the rotary lower can part  6 , so as to always provide the free-rotation of the cylinder case  1 .  
         [0027]    [0027]FIG. 2 and FIG. 3 show a perspective view and a plan view for the assembled state where a dead bolt for opening and shutting the door lock is associated with the cylinder case  1  for accommodating all parts of the electric cylinder. The opening and shutting is carried out by turning an opening and shutting knob  44  with fingers to displace the dead bolt  24  within a door.  
         [0028]    When the dead bolt  24  is inserted through a door dead bolt guide  19  into a locking hole provided on the wall, the door is locked. The knob  44  is turned from the locking hole so as to provide the unlocking state. The dead bolt guide  19  is fixed to the end face of the door by bolt  54 .  
         [0029]    [0029]FIG. 4 shows a partial perspective view of rotary upper and lower can parts for using a screwed motor shaft. The shaft  9  of the motor  8  is screwed and the hole  28  of the lower can part  6  is screwed, so that when the shaft  9  is rotated, the rotary lower can part  6  engaged with the shaft  9  is advanced at the positive electrode to be associated with the disc  4 . As the negative electrode is connected to the motor, the rotary lower can part  6  is detached from the disc  4 , or the shaft  9  of the motor  8  is not extended and contracted. The shaft  9  and the hole  28  of the rotary lower can part  6  are respectively provided with screws, so that the rotary lower can part  6  is reciprocated and associated with the disc  4 .  
         [0030]    [0030]FIG. 5 shows a partial perspective view of a whole exploded electric cylinder provided with the motor  8  and the rotary dish plate  46 , the electric cylinder may be rotated under an angle of more than 360 degrees.  
         [0031]    The shaft  9  of this stepping motor  8  is disposed in parallel to the tailpiece assembly and contacted with the surface of the rotary dish plate  46 . One side of the rotary dish plate  46  is provided with a movable rectangular rod  51  and the other side of the rotary dish plate  46  is provided with a cylindrical rod  52  which is inserted through a spring  43  into a hole  31  of a hollow pole  30 . The one movable rectangular rod  51  is associated with a cylinder  47  having a slide hole  49  of the tailpiece assembly in the piston-cylinder relation.  
         [0032]    The tailpiece  14  associated with the rotary dish plate  46  is disposed in parallel to the stepping motor  8 , so that the cables  39  and  40  drawn from the stepping motor  8  do not hinder the rotation of rotary dish plate  46 . Accordingly, the electric cylinder may be rotated at the more than 360 degrees. After the tailpiece  14  is inserted through the hole  16  into the rotary cylinder  15 , when the ring  20  is clamped in an annular groove  48  provided on the cylinder  17  of the tailpiece assembly, the tailpiece assembly is fixed in the rotary cylinder  15 . The disc  4 , the rotary dish plate  46 , the tailpiece assembly and the rotary cylinder  15  are disposed in a linear relation and accommodated in the case  1 .  
         [0033]    When the one cable  39  is connected to the positive electrode and the other cable  40  is connected to the negative electrode, the shaft  9  associated with the motor  8  is displaced in the arrow direction  50  as shown in FIG. 1, to push the rotary dish plate  46  associated with the shaft  9 , so that the projections  7  integrated with the rotary dish plate  46  are entered into plural holes  26  opened on the disc  4  which is accommodated in the cylinder case  1 . In this state, turning the cylinder case  1  by hand, the turning movement permits the disc  4  and the rotary dish plate  46  to be associated with each other and transmitted through the rectangular rod  51  of the rotary dish plate  46  and the slide hole  59  provided in the cylinder  47  of the tailpiece assembly to the tailpiece  14 , so that the dead bolt  24  is actuated to provide an unlocked state. However, when the dead bolt  24  is contacted to a socket of the door (not shown), the dead bolt  24  is not actuated to the normal position. In this case, as the cylinder case  1  is continued to turn by hand, springs  3  are contracted, and when a further constant power is applied to the engaging portions, or projections  7  of the rotary dish plate  46  and holes  26  of the disc  4 , the projections  7  are detached from the holes  26  because at least one of the projections  7  and holes  26  is provided with the inclined angle, so that the cylinder case  1  is turned by hand force to generate a clicking sound (click-clack).  
         [0034]    Effects of the Invention:  
         [0035]    According to this invention, the electric cylinder may be easily attached to the existing door lock to prevent picking completely.  
         [0036]    This invention is to provide the electric cylinder door lock not having a keyhole with a means of easily attaching the cylinder to the existing door opening and shutting lock from the front side of the door by clamping the bolts. According to the electric cylinder for actuating the door lock of this invention, the cables of the stepping motor do not hinder the rotation of the rotary dish plate which is based on the locking and unlocking operations for carrying out the rotation of the electric cylinder, so that this electric cylinder may be adapted to use in foreign cylinder locks such as European cylinder locks so as to turn it at an angle of more than 360 degrees.  
         [0037]    According to the electric cylinder for actuating the door lock of this invention, the electric cylinder may be easily attached to the existing door locks. Using the telephone or the remote operation from one&#39;s room, and moreover using the fingerprints and the tenkeys, the electric cylinder may be used in the locking and unlocking lock.  
         [0038]    According to this invention, during unlocking operation when a further constant force is applied to this electric cylinder, the associated engagement of the rotary can or dish plate and the disc is detached from each other, so that the cylinder case may be free-rotated in manual operation.  
       DESCRIPTION OF REFERENCE NUMBERS  
       [0039]    [0039] 1  . . . a cylinder case  
         [0040]    [0040] 2  . . . stand poles  
         [0041]    [0041] 3  . . . springs  
         [0042]    [0042] 4  . . . a disc  
         [0043]    [0043] 5  . . . clamping rings  
         [0044]    [0044] 6  . . . a lower rotary can part  
         [0045]    [0045] 7  . . . projections  
         [0046]    [0046] 8  . . . a motor  
         [0047]    [0047] 9  . . . a shaft  
         [0048]    [0048] 10  . . . a clamping metal fitting  
         [0049]    [0049] 11  . . . bolts  
         [0050]    [0050] 12  . . . a cable passing groove  
         [0051]    [0051] 13  . . . an upper rotary can part  
         [0052]    [0052] 14  . . . a tailpiece  
         [0053]    [0053] 15  . . . a stationary can  
         [0054]    [0054] 16 , 17 , 18  . . . holes  
         [0055]    [0055] 19  . . . a dead bolt guide for a door  
         [0056]    [0056] 20  . . . a clamping ring  
         [0057]    [0057] 21  . . . an inner case for a lock  
         [0058]    [0058] 22 , 23  . . . bolts  
         [0059]    [0059] 24  . . . a dead bolt  
         [0060]    [0060] 25  . . . a decorative seat block  
         [0061]    [0061] 26  . . . a number of holes  
         [0062]    [0062] 27  . . . a hole  
         [0063]    [0063] 28  . . . a central hole of a lower rotary can part  
         [0064]    [0064] 29  . . . engaging grooves  
         [0065]    [0065] 30  . . . a hollow pole  
         [0066]    [0066] 31  . . . a hole of a hollow pole  
         [0067]    [0067] 32  . . . a central hole  
         [0068]    [0068] 33  . . . grooves of a shaft  
         [0069]    [0069] 34  . . . a clamping ring  
         [0070]    [0070] 35  . . . a clamping ring  
         [0071]    [0071] 36  . . . a screwed hole  
         [0072]    [0072] 37  . . . a set portion of a stationary can part  
         [0073]    [0073] 38  . . . a cylinder portion  
         [0074]    [0074] 39 , 40  . . . cables for positive and negative electrodes  
         [0075]    [0075] 41  . . . a surface of a decorative seat block  
         [0076]    [0076] 42  . . . a groove face  
         [0077]    [0077] 43  . . . a spring  
         [0078]    [0078] 44  . . . an opening and shutting knob  
         [0079]    [0079] 45  . . . an arrow  
         [0080]    [0080] 46  . . . a rotary dish plate  
         [0081]    [0081] 47  . . . a tailpiece cylinder  
         [0082]    [0082] 48  . . . an annular groove of a tailpiece cylinder  
         [0083]    [0083] 49  . . . a slide hole of a tailpiece cylinder  
         [0084]    [0084] 50  . . . an arrow  
         [0085]    [0085] 51  . . . a rectangular rod of a rotary dish plate  
         [0086]    [0086] 52  . . . a cylindrical rod of a rotary dish plate  
         [0087]    [0087] 53  . . . a central hole of a decorative seat block  
         [0088]    [0088] 54  . . . bolts  
         [0089]    [0089] 55  . . . a ring plate

Technology Classification (CPC): 4