Classifications

• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
  • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
  • E05B47/06—Controlling mechanically-operated bolts by electro-magnetically-operated detents
  • E05B47/0611—Cylinder locks with electromagnetic control
  • E05B47/0619—Cylinder locks with electromagnetic control by blocking the rotor
  • E05B47/0626—Cylinder locks with electromagnetic control by blocking the rotor radially
  • E05B47/063—Cylinder locks with electromagnetic control by blocking the rotor radially with a rectilinearly moveable blocking element
• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
  • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
  • E05B47/0001—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof
  • E05B2047/0014—Constructional features of actuators or power transmissions therefor
  • E05B2047/0018—Details of actuator transmissions
  • E05B2047/0024—Cams
• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
  • E05B27/00—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in
  • E05B27/0057—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in with increased picking resistance
  • E05B27/006—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in with increased picking resistance whereby a small rotation without the correct key blocks further rotation of the rotor
  • E05B27/0064—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in with increased picking resistance whereby a small rotation without the correct key blocks further rotation of the rotor whereby the rotor is irreversibly blocked or can only be moved back with an authorized tool or key
• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
  • E05B27/00—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in
  • E05B27/0082—Side bar locking
• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
  • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
  • E05B47/0001—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof
  • E05B47/0012—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof with rotary electromotors

Definitions

• the present invention relates generally to an electromechanical cylinder lock and, m particular, a cylinder loc ⁇ in which a blocking arrangement is mechanically returned to a blocking position by means of key with-
• a drawback with this prior art locking device is that ⁇ c mechanical returning of the locking members is pro- viced. This means that tne locking members remain in a ncn-blockmg position should the lock be de-energised during operation thereof, thus decreasing the security of the lock. This could be a result of someone removing tne battery in the key powering the blocking mechanism.
• Anotner OD]ect is to provide a lock device, which is more secure than prior art lock devices.
• T ⁇ e invention is baseo on the realisation that tne blocking mecnanism can be provided with means co-operating witn a return mechanism during withdrawal of a key from tne lock.
• loc ⁇ -key combination as defined in claim 1.
• a lock-key combination according to tne invention s more secure than prior art devices m that mechanical returning of the blocking mechanism is ensured during withdrawal of the key from the lock.
• Fig. 4 is a perspective view showing the interaction of tne finger pin shown in fig. 3 and a key;
• Fig. 5 shows a cross sectional view of the lock device of figure 1 with the blocking mechanism m a non-block- mg position;
• Fig. ⁇ is a view similar to that of figure 5 but wi n tne clocking mechanism in a fully clocking position;
• F g. 7 s a view similar to tnat of figure 5 but witn a s ce bar in an exten ⁇ e ⁇ position;
• Fig. 8 is a view similar to that cf figure 5 but with tne blocking mechanism in a blocking position effected cy means of withdrawal of the key from the lock;
• Fig. 9 is a cross sectional view of the lock device of figure 1 showing indexing cf the actuator.
• Figs. lOa-c are a perspective view, a plan view and a cross sectional view of a second emoodiment, respectively, of a second embodiment of a blocking mecnanism according to the i-ventior .
• FIG 1 an exploded perspective view of a cylinder core according to the invention, generally designated 10, is snown.
• the core is arranged to be placed in a bore 4 of a conventional cylinder housing 2 (shown in figures 5- 9 , .
• the core has an cuter surface substantially corresponding to the bore of the housing and includes a key-way 12 configured to receive a key as is known in tne art.
• the core 10 includes a plurality of tumbler pm bores 14 that receive tumbler pins, of which one 16 is shown in figure 1.
• the manner in which a properly bitted key (not shown in figure 1) engages the tumbler pins and positions them to a shear line to permit the core 10 to be rotated with respect to the housing is known in the art and thus will not be described in more detail herein.
• blocking mechanism will now be described in detail.
• the term blocking mechanism will in this description refer to, besides the side bar 20, the elongated actuator 30 with a partly cylindrical en- velope surface and an electric motor 40 with a shaft 46 mechanically coupled to the actuator 30.
• the motor 40 is energised under control of lock elec- tronics 48 electrically connected to the motor by means of wires, see figure 1.
• the electronics 48 comprises a custom made micro controller with associated memories, driving circuitry etc. and is powered by a battery lo ⁇ cated in a key inserted into the lock.
• a key contact 42 in the form of an electrically conducting metal strip shaped so as to make contact with a contact on the side of the key blade cf the inserted key.
• a yoke shaped positioning element 60 is provided outside of the actuator 30 but inward of the side bar 20, see also figure 3.
• the positioning element 60 is spring biased radially outward by means cf springs (net shown) .
• cf springs net shown
• the spring force applied on the positioning element 60 forces the side bar 20 radially outward and into en- ga ⁇ ement with the walls of the side bar cavity 4.
• a spring (not shown) provided at the other end of the side bar compared to the positioning element and also functioning to urge the side bar 20 radially outward.
• the blocking mechanism is shown in a non- blocking position, i.e., with an inserted key.
• the side bar 20 is shown out of alignment with the side bar cavity 6 and in a retracted position and the cylinder core 10 is thus free to rotate in the cylinder housing bore.
• the actuator 30 is not en- tirely cylindrical. Instead, besides a cylindrical envelope surface 38, it is provided with a recess 35 and an essentially flat engagement surface 36, see figures 2a and 2b.
• the actuator 30 In the non-blocking position, the actuator 30 is in the position shown in figure 5.
• the cut out portion comprising the recess 35 allows the side bar to be retracted within the outer periphery of the core 10 and into the recess 35, thus allowing rotation of the core relative to the housing.
• the rotation of the actuator 30 to the position shown in figure 5 is effected by means cf the motor 40.
• the normal blocking position of the blocking mechanism will now be described with reference to figure 6.
• the side bar 20 has now been aligned with the side bar cavity 6 and pushed therein by means of the force exerted by the positioning element 60 and the above mentioned spring (not shown) provided at the ether end of the sice oar.
• the actuator has then been rotated approximately 180° counter clockwise compared to the position shc * n in figure 5. This means that instead of the recess 35, the cylindrical envelope surface 38 of the ac- tuator now faces the side bar. In that position, the side bar 20 is prevented from being cammed to within the outer periphery of the core 10, i.e., to within the shear line between the core 10 and the housing 2.
• the rotational movement of the actuator 30 to the position show" in figure 6 is commanded by the electronics 48 whe- the key is withdrawn from the lock key-way 12. This is tne normal operation of the blocking mechanism.
• the side bar 20 is snown in engagement with the walls of the side car cavity 6.
• This position is cDtamed when the side bar 20 aligned with the side bar cavity 6 ana, as already stated, the positioning element 60 forces tne si ⁇ e bar into engagement with the side bar cavity walls. In that position, the side bar does not impede the rotation of tne actuator 30.
• the key releases the finger pin 50 and the spring force exerted by the spring 54 forces the finger pin downward against the actuator 30.
• an engagement surface 56 in the cut out portion 52 of the finger pin 50 engages the engagement surface 36 of the actuator, thereby forcing the actuator to rotate counter clockwise approximately 60° to the position shown in figure 8.
• the envelope surface 38 of the actuator faces the side bar 20, thereby blocking the radially inward movement of the side bar.
• the actuator 30 has not been rotated as far away from the non-blocking position shown in figures 5 and 7 as when in the normal blocking position shown in figure 6.
• the interaction between the engagement surface 36 of the actuator and the engagement surface 56 of the finger pin ensures that the actuator can not accidentally or fraudulently be rotated to a non-blocking position.
• the rotation of the actuator 30 is also constrained or indexed by means of a protrusion or pin 22 provided on the side bar 20 and a co-operating indexing groove 39 in the envelope surface of the actuator 30, see figure 2a.
• the operation thereof appears from figure 9, which is a cross-sectional view of the lock in level with the indexing groove of the actuator.
• the groove 39 runs approximately 180° degrees around the actuator and the protrusion 22 is guided in that groove during rotation of the actuator. This limits the rotation of the actua- tor to within allowed limits and thus ensures reliable rotation of the actuator.
• FIG 10a there is shown an actuator 30' of essentially the same shape as the actuator 30 described above with reference to the first embodiment.
• the actuator shown in figure 10a s provided with longitudinal grooves 37 along essentially the entire envelope surface 38' thereof.
• Tne grooves 37 constitute means co-operating with at least one step 24 provided on the side bar 20' .
• the function of the grooves 37 and the step 24 will now be described w th reference to figure 10c, which is a cross sectional view of the actuator 30' and the side bar 20' taken along the lines A-A, see figure 10b.
• the step 24 does not impede the rotation of the actuator 30' .
• the side bar 20' is cammed out of tne cavity, thereby pressing against the actuator 30' . If the actuator is rotated while the core is rotated, the step 24 of the side bar 20' will engage the first groove 37 encountered and be seated therein, thereby preventing further rotation of the actuator 30' .
• step 24 and the grooves 37 increases the security of the lock, making it even harder to effect a fraudulent movement of the actuator from a blocking to a non-blocking position.
• the actuator has been shown with a specific shape. It is realised that it could have any suitable shape as long as it moves from a non-blocking position (figure 5) to a blocking position (figure 8) under mechanical control when the key is withdrawn from the lock.
• finger pin Although only one finger pin has been shown in the figures, there can be mere than one finger pin interacting with an inserted key and the actuator. This finger pin has been shown movable essentially perpendicularly to the axis of the lock cylinder. It is realised that this pin can be movable in other directions as long as the interaction between the pin and the key and the actuator, respectively, is provided in a functioning way.
• the finger pin has been shown interacting with a side code of the key.
• the finger pin can also interact with other portions of the key, such as a groove provided on the side of the key blade. It could for example be provided in the form cf a guided pin.
• REFERENCE NUMERALS Housing Bore Side bar cavity Cere Key-way Tumbler pin bores Tumbler pin , 20' Side bar Indexing protrusion Step , 30' Actuator Actuator bore Driving bore Journalling pin Recess Engagement surface Grooves , 38' Envelope surface Indexing groove Motor Key contact Motor shaft Electronics Finger pin Cut out portion Helical spring Engagement surface Positioning element

Applications Claiming Priority (3)

Publications (2)

Family

ID=20418296

Family Applications (1)

Country Status (7)

Cited By (3)

Families Citing this family (11)

Family Cites Families (4)

• 1999
  • 1999-12-23 SE SE9904771A patent/SE517942C2/sv not_active IP Right Cessation
• 2000
  • 2000-12-22 AT AT00989145T patent/ATE276418T1/de not_active IP Right Cessation
  • 2000-12-22 AU AU25688/01A patent/AU2568801A/en not_active Abandoned
  • 2000-12-22 WO PCT/SE2000/002653 patent/WO2001048341A1/en active IP Right Grant
  • 2000-12-22 EP EP00989145A patent/EP1240399B1/de not_active Expired - Lifetime
  • 2000-12-22 DE DE60013899T patent/DE60013899D1/de not_active Expired - Lifetime
• 2002
  • 2002-06-21 NO NO20022995A patent/NO20022995L/no not_active Application Discontinuation

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events