Field of the Invention

This invention relates to smart locks with update code communication and particularly to smart locks without batteries subject to degradation and depletion.

BACKGROUND

Smart locks are known devices which are affixed to doors or other entrances, with the smart lock having an integrated interface, most commonly a key pad, for the entry of key codes for opening of the door to which it is affixed. Other types of interfaces include magnetic key cards for insertion into the lock or RF controlled cards for proximate placement to the lock.

For ease of installation and lower cost for the lock and installation, the smart lock is provided with a battery power source rather than being hard wired into electrical supply systems. In addition, the battery, with a constant-on and powering mode, enables the smart lock to be in constant communication, usually via local wi-fi internet connection, to a central computer which periodically transmits periodically updated key codes for enhanced security. In view of this constantly required connection a full time power source is required and batteries are the full time power source of preference. If only lock activation is required, on- demand electrical power may be provided such as via mechanically operated dynamos. Such dynamos are described, for example, in US Patent No. 8354914 issued to Duane Buckingham and in US Patent Publication 2005/0099262 by Robert Childress, for use in powering door lock operations. However, for actual communication with a central computer, Childress requires a separate cell phone connected to the lock with an audio signal and Buckingham relies on a separate controller distanced from the lock. The parent of this application also discloses the use of a dynamo for powering a smart lock as an emergency source of power for opening a door with depletion of primary battery power for the smart lock

Smart locks, as they are known, have thus not been able to be fully operable without a battery or a hard wired connection. SUMMARY OF THE INVENTION

It is accordingly an object of the present invention to provide a smart lock system which is not powered by a battery, detrimentally subject to depletion and failure, yet which is able to function with all of the battery powered smart lock functions including the ability to program key codes and other functions remotely, via a typical wi-fi connection.

Generally, the invention comprises a smart lock system and method of smart lock operation which does not require battery power. The smart lock system herein is comprised of a smart lock which is powered only with a failure resistant dynamo, such as shown in the parent application, but without the need for batteries for full smart lock operation including lock operational updating.

The smart lock system comprises:

a) an electrically operable smart lock element configured to be affixed to a door and having a locking mechanism configured for locking/unlocking the door; b) a data entry interface element directly associated with the smart lock element configured for the entry of a valid key code for opening of the locking mechanism and the door;

c) a mechanically operated power generator directly associated with the smart lock for providing operating energy for powering the smart lock element, without battery power, for the data entry interface for operative entry of the key code for unlocking the locking mechanism;

d) a separate controller element configured to be in communication with the smart lock element, via a communication connection, when the mechanically operated power generator provides operating energy to the smart lock element, and wherein the controller element is configured to constantly receive and store updated key code information from a remote location source;

e) a communication router to which the smart lock element is electronically

connected, when provided with the operating energy;

f) an electronic control element within the smart lock element configured to

synchronize with the controller element, with the providing of the operating energy and activation of the electronic control element with an activation element to receive and store updated key code information, if any, prior to any unlocking activation of the locking mechanism, and with the electronic control element configured to compare stored key code information with entered key codes via the data entry interface;

wherein the locking mechanism is configured to be unlocked thereafter with entry of a valid key code corresponding to a key code stored in the electronic control element.

The operations of opening or closing of the lock is effected by mechanical winding of the dynamo which supplies power for a very limited period of time just sufficient to power the interface such as a key pad for opening the electrically controlled lock. The dynamo winding mechanism, in one embodiment, is integrated with a latch handle of the smart lock.

For the additional smart lock operations of the system, a separate controller is provided with wi-fi or direct route internet or other communication access and the smart lock is similarly provided with immediate access to wi-fi or direct route internet or other communication access upon being powered. The controller is constantly on and programmed to communicate with the lock at any time when the lock is powered by the dynamo. A remote station is in contact such as with an internet connection with the controller at all times.

In order to provide programming of key codes, the smart lock system comprises the communication connected controller which is configured to communicate with the lock with the following protocol and lock configuration and operation:

Opening of the lock is effected by lifting the latch lever of the lock in an upward direction to spring load the dynamo with this movement and then the lever is returned to the neutral normal position. Upward lever movement initiates a program in which:

a) The lock contains an electronic control element which is caused to synchronize with the controller to receive stored latest key codes and which, in turn, notifies the controller of the initial operation of the lock, then

b) The electronic control element of the lock compares digits entered on the key pad with its internally stored and updated code list and determines a proper response (valid and opening of the lock, invalid and no opening).

Key codes are remotely programmed from the remote station with the adding or deleting of key codes at any time via the communication connection between the remote station, at which the key codes are generated or removed, and the controller. The commands with key codes are stored only in the controller, without necessity for the lock to be powered. The lock is configured to synchronize with the controller, as described above, at the initiation step before lock opening action is effected with the stored transmission of required current key code data for lock operation. As a result, there is always full smart lock function even without the presence of a battery or any constant source of power.

The method of operation of the smart lock for opening a door comprises the steps of: a) providing a smart lock on a door, with the smart lock having a data entry interface for entry of a valid key code and an electronic control element, with only a mechanically operated dynamo as a power source for the smart lock; b) providing a controller element separate from the smart lock and configured to be in data transmission communication with the smart lock only upon powering of the smart lock with the dynamo, wherein the controller element is configured to receive updated key code information and to transmit the updated key code information to the smart lock for operational storage in the electronic control element;

c) configuring the mechanically operated dynamo to open communication with the controller upon initial activation to effect transmission of updated key code information; and

d) completion of powering the smart lock with the dynamo and entry of a key code via the data entry interface; and

e) comparison by the electronic control element of an entered key code with a stored key code for the validation thereof and the opening of the door.

Though the lock system by Buckingham, as described in US Patent No. 8354914, includes a controller it is not provided with any key code update function or synchronization with the smart lock, except for functions such as remote powering of the lock.

The above objective and other features and advantages of the invention will become more evident from the following drawings in which:

SHORT DESCRIPTION OF THE DRAWINGS

Figure 1 is a schematic view of the components of the system of the invention,

Figure 2 is a schematic flow chart of the system operation,

Figures 3, 4 and 5 are applicant’s prior versions of hybrid powering lock systems with both battery power and back-up mechanical power generation, with the latter being the sole power source in the present application. DETAILED DESCRIPTION

At initial step 1, at the start of a smart lock A in Figure 1 as shown in Figure 2, a lock lever of smart lock A is lifted (not shown) to activate a powering dynamo contained within the lock and the lever is returned to its initial position. The lock A is activated to initiate the program at step 2 to inquire whether the controller B is active with an updated key code or not. If controller B is not active then the system moves to step 4 with the key pad lighting up to accept an entered key code as previously programmed. If the controller B is active then at step 3 the lock synchronizes with the controller to receive updated codes and the system moves to step 4 for entry of the code. At step 5 the lock system checks whether the entered code matches any key code in a key code storage table. If there is a match, then the door is unlocked at step 6. If there is an invalid code then the system moves to step 7 to see if the invalid code has been entered more than 3 times and, if so, the lock is disabled for 15 minutes (or other pre-selected time period). If an invalid code has been entered less than 3 times, the system moves in a loop, as shown, for entry of a new code.

Lock A, Figure 1 is shown in more detail in Figures 3, 4 and 5, as applicant’s related art embodiments. Lock 45 includes an electrically operable key pad 1 lb for entry of requisite key codes. Dynamo 40, with operating gears 24 and 25, and flywheel 41, with circuit 42, serve to mechanically generate sufficient electrical power to operate the keypad 1 lb and also to power the smart lock or electronic control element 46 for operation, as depicted in Figure 2, without the battery used in the prior art. Up and down movement of door lock lever l2b of typical prior art locks, is modified in accordance with the operational logic of Figure 2 to effect key code updating (with initial up movement of the lever), without battery power normally constantly on, as in the prior and related art, but which is not available, except on demand, in the present invention. Battery related element 43 of Figure 5 is neither required nor present in the lock A of the present invention.

It is understood that the above description and details are exemplary of the invention and that changes in the process and details may be made without departing from the scope of the invention as defined in the following claims.