Patent Description:
It is common practice for retailers to display relatively small, relatively expensive items of merchandise on a security device, such as a display hook or a display fixture, within security packaging commonly referred to as a "safer", or otherwise on a display surface. The security device or safer displays an item of merchandise so that a potential purchaser may examine the item when deciding whether to purchase the item. The small size and relative expense of the item, however, makes the item an attractive target for shoplifters. A shoplifter may attempt to detach the item from the security device, or alternatively, may attempt to remove the security device from the display area along with the merchandise. Items of merchandise may also be secured using a display stand to allow users to sample the item for potential purchase. In some instances, the security device is secured to a display support using a lock operated by a key, for example, a mechanical lock. In other instances, the security device is secured to the display support using a lock operated by an electronic key to arm and disarm the security device.

<CIT> describes a lock system having a remote actuating key device and a passive lock device for receiving a signal from the key. The lock device includes an actuatable trigger mechanism and a control circuit which determines if the signal is appropriate to unlock the lock, whereupon it produces a trigger signal. The trigger mechanism is responsive to the trigger signal to actuate and enable the lock device to be opened.

<CIT> describes a system and method for displaying merchandise item. A merchandise display system includes a display cabinet, an alarm unit and a key extension device. The key extension device can be mounted on the display cabinet away from the alarm unit to allow an electronic key to be inserted into the key extension devise to control the alarm unit.

<CIT> describes a security system and method for protecting an item of merchandise. A programming station generates a security code and communicates the security code to a memory of a programmable key. The programmable key initially communicates the security code to a memory of a security device and subsequently operates the security device upon a matching of the security code in the memory of the security device with the security code in the memory of the programmable key.

The present invention provides a merchandise security system and a method for protecting an item of merchandise susceptible to theft as defined in the appended claims. Embodiments of the invention will be described in the following with reference to the appended drawings, in which.

Referring now to the accompanying drawing figures wherein like reference numerals denote like elements throughout the various views, one or more embodiments of a merchandise display security system are shown. In the embodiments shown and described herein, the system includes an electronic key and a merchandise security device. Merchandise security devices suitable for use with the electronic keys include, but are not limited to, a security display (e.g. alarming stand), security fixture (e.g. locking hook, shelf, cabinet, etc.) or security packaging (e.g. merchandise keeper) for an item of merchandise. However, an electronic key (also referred to herein as a programmable key or generally as a key) may be useable with any security device or locking device that utilizes power transferred from the key to operate a mechanical and/or electronic lock mechanism and/or utilizes data transferred from the key to authorize the operation of a lock mechanism and/or arming or disarming an alarm circuit. In other words, an electronic key is useable with any security device or locking device that requires power transferred from the key to the device and/or data transferred from the key to the device. Further examples of security devices and locking devices include, but are not limited to, a door lock, a drawer lock or a shelf lock, as well as any device that prevents an unauthorized person from accessing, removing or detaching an item from a secure location or position. Although the following discussion relates to a system for use in a retail store, it is understood that the system is also suitable for other industries, such as hospital, restaurants, etc. In some embodiments, the merchandise security device and the electronic key are similar to those disclosed in <CIT>, entitled Electronic Key for Merchandise Security Device.

<FIG> illustrates one embodiment of a system <NUM>. In this embodiment, the system generally includes an electronic key <NUM>, one or more merchandise security devices <NUM>, a programming or authorization station <NUM>, and a charging station <NUM>. <FIG> shows an embodiment of a system <NUM> that is part of a network of merchandise security devices. According to some embodiments, the network enables communication between a plurality of electronic keys and merchandise security devices. The network may be cloud-based and include a cloud <NUM> for receiving data from, and/or providing data to, the electronic keys and/or merchandise security devices. The cloud <NUM> may facilitate data transfer to one or more remote locations or devices <NUM> (e.g., a tablet or computer) where the data may be reviewed and analyzed. The network may be a mesh network including a plurality of nodes <NUM> that are configured to communicate with one another, one or more electronic keys <NUM>, and/or one or more merchandise security devices <NUM>. The nodes <NUM> and/or security devices <NUM> may be located within one or more zones. A gateway <NUM> may be employed to allow for communication between the one or more nodes <NUM> and the cloud <NUM>. In some embodiments, all communication within the network is wireless, such as via radio-frequency signals (e.g., Sub GHz ISM band or <NUM>), although other types of wireless communication may be possible.

In some embodiments, each electronic key <NUM> is configured to store various types of data. For example, each key <NUM> may store a serial number of one or more merchandise security devices <NUM>, the data and time of activation of the key, a user of the key, a serial number of the key, a department number within a retail store, number of key activations, a type of activation (e.g., "naked" activation, activation transferring only data, activation transferring power, activation transferring data and power), and/or various events (e.g., a merchandise security device has been locked, unlocked, armed, or disarmed). For instance, <FIG> shows that the identity of a user of an electronic key <NUM> may be communicated to a remote location or device <NUM>. This information may be transmitted to the remote location or device <NUM> upon each activation of the key <NUM> or at any other desired period of time, such as upon communication with a programming or authorization station <NUM>. Thus, the data transfer may occur in real time or automatically in some embodiments. In some cases, the programming station <NUM> may be configured to store the data and transfer the data to a remote location or device <NUM>. Authorized personnel may use this data to take various actions, such as to audit and monitor associate activity, determine the battery life of a key <NUM>, audit merchandise security devices <NUM> (e.g., ensure the security devices are locked or armed), etc. Moreover, such information may be requested and obtained on demand, such as from the programming station <NUM>.

In some cases, the data may include battery analytics of an electronic key <NUM>. For example, the battery analytics may include monitoring the battery voltage of an electronic key <NUM> when the key is placed on a charging station <NUM> and the time taken to reach full charge. These values may be used to determine depth of discharge. The battery analytics may be indicative of a battery that is nearing its end of life. A retailer or other authorized personnel may take various actions using this information, such as replacing the key or disabling the key to prevent battery swelling and housing failure.

In one embodiment, the electronic key <NUM> is configured to obtain data from a merchandise security device <NUM> (e.g., a security fixture). For example, the merchandise security device <NUM> may store various data regarding past communication with a previous electronic key <NUM> (e.g., key identification, time of communication, etc.), and when a subsequent electronic key communicates with the same merchandise security device, the data is transferred to the electronic key. Thus, the merchandise security device <NUM> may include a memory for storing such data. In some cases, the merchandise security device <NUM> includes a power source for receiving and storing the data, while in other cases, the power provided by the electronic key <NUM> is used for allowing the merchandise security device to store the data. The electronic key <NUM> may then communicate the data for collection and review, such as at a remote location or device <NUM>. In some instances, communication between the electronic key <NUM> and the programming or authorization station <NUM> may allow data to be pulled from the electronic key and communicated, such as to a remote location or device <NUM>. In other cases, the electronic key <NUM> may be configured to obtain data from merchandise security devices <NUM> (e.g., a security display), such as an identification of the merchandise security device, the type of item of merchandise on display, an identification of the item of merchandise, and/or the system health of the security device and/or the item of merchandise. The electronic key <NUM> may store the data and provide the data to a remote location or device <NUM> upon communication with the programming or authorization station <NUM>. As such, the electronic keys <NUM> may be a useful resource for obtaining various types of data from the merchandise security devices <NUM> without the need for wired connections or complex wireless networks or systems.

In some cases, each electronic key <NUM> may be authorized for specific locations, departments, or merchandise security devices. For instance, <FIG> shows that a manager may have authorization for all zones, locations, departments, or merchandise security devices (indicated as numbers <NUM>-<NUM>), while a first associate may only have authorization for two zones, locations, departments, or merchandise security devices (indicated as numbers <NUM> and <NUM>), and a second associate may only have authorization for one zone, location, department, or merchandise security device (indicated as number <NUM>). As such, a retail store or other establishment may limit the scope of authorization for different associates within the same retail store. In order to accommodate different authorizations levels, each key <NUM> may be configured to store a code that is associated with each zone, location, department, or merchandise security device. For example, each zone may include a plurality of merchandise security devices <NUM>, and a retail store may have multiple zones (e.g., a zone for electronics, a zone for jewelry, etc.).

Various techniques may be used to initially program the electronic key <NUM>. For example, the electronic key <NUM> may be initially presented to each authorized merchandise security device <NUM>. Upon communication with the security device <NUM> or the cloud <NUM>, the electronic key <NUM> will be paired with each security device. A programming station <NUM> may provide a code to the electronic key <NUM>, and the key or cloud <NUM> may then communicate the code to each of its authorized security devices <NUM>. Each key <NUM> may only need to be programmed once. In some embodiments, a programming station <NUM> may be located within each zone, and a key <NUM> may receive a code from each programming station that it is authorized. Thereafter, each key <NUM> may need to be "refreshed" at the programming station <NUM> or a charging station <NUM> following a predetermined period of time. In other embodiments, the electronic key <NUM> may be programmed directly via the cloud <NUM>.

In another embodiment, each electronic key <NUM> may include a security code and a serial number for one or more merchandise security devices <NUM>. For example, a key <NUM> may only be able to arm, disarm, lock, or unlock a merchandise security device <NUM> where the security codes and the serial numbers match one another. Each serial number is unique to a merchandise security device <NUM> and could be programmed at the time of manufacture or by the retailer. This technique allows for greater flexibility in programming keys <NUM> and assigning keys to particular merchandise security devices <NUM> and/or zones. In one embodiment, a setup electronic key <NUM>" may be used to initially map particular merchandise security devices <NUM> and serial numbers. In this regard, the setup key <NUM>" may be used to communicate with each key <NUM> and obtain the serial number of each merchandise security device <NUM>. The setup key <NUM>" may also obtain a location of the security devices <NUM>, or a user of the setup key may provide a description for each merchandise security device (e.g., SN # <NUM> = merchandise security device #<NUM>). The setup key <NUM>" may communicate with a tablet or other computing device <NUM> for accumulating all of the information (see, e.g., <FIG> and <FIG>), which may occur via wired or wireless communication. Thus, the tablet or computing device <NUM> may map each of the serial numbers with the merchandise security devices <NUM> and in some cases, may also include serial numbers and corresponding electronic keys <NUM>. Individual electronic keys <NUM> may then be assigned particular serial numbers for authorized merchandise security devices <NUM> (e.g., user <NUM> includes serial numbers <NUM>, <NUM>, <NUM>; user <NUM> includes serial numbers <NUM>, <NUM>, <NUM>). Each of the electronic keys <NUM> may be programmed with the same security code using a programming station <NUM>. In some embodiments, the setup process may be used in conjunction with a planogram of the merchandise security devices <NUM>. The planogram may represent a layout of the merchandise security devices <NUM> within a retail store or other establishment. For example, a setup key <NUM>" may be used to map serial numbers to specific merchandise security devices <NUM> on a planogram as the setup key communicates with each merchandise security device. The setup key <NUM>" may communicate with a tablet or other computing device <NUM> for populating the planogram with serial numbers, such as via a wired connection (see, e.g., <FIG>). This planogram may be uploaded to a remote location or device for managing the planogram. As before, particular serial numbers may be assigned to authorized users.

In order to arm, disarm, lock, or unlock a merchandise security device <NUM>, the electronic key <NUM> may communicate with a particular merchandise security device and determine whether the security codes and the serial numbers match. If the codes match, the electronic key <NUM> then arms, disarms, locks, or unlocks the merchandise security device <NUM>. Upon refreshing an electronic key <NUM> and/or when a user requests an electronic key via programming or authorization station <NUM>, any available electronic key may be used since the key may be programmed in real time with the appropriate level of authorization for that user (e.g., specific zones, departments, and/or merchandise security devices).

In one embodiment, the merchandise display security system <NUM> comprises an electronic key <NUM> and a merchandise security device <NUM> that is configured to be operated by the key. The system may further comprise an optional programming station <NUM> that is operable for programming the key <NUM> with a security code, which may also be referred to herein as a Security Disarm Code (SDC). In addition to programming station <NUM>, the system may further comprise an optional charging station <NUM> that is operable for initially charging and/or subsequently recharging a power source disposed within the key <NUM>. For example, the key <NUM> and merchandise security device <NUM> may each be programmed with the same SDC into a respective permanent memory. The key <NUM> may be provisioned with a single-use (i.e., non-rechargeable) power source, such as a conventional or extended-life battery, or alternatively, the key may be provisioned with a multiple-use (i.e. rechargeable) power source, such as a conventional capacitor or rechargeable battery. In either instance, the power source may be permanent, semi-permanent (i.e., replaceable), or rechargeable, as desired. In the latter instance, charging station <NUM> is provided to initially charge and/or to subsequently recharge the power source provided within the key <NUM>. Furthermore, key <NUM> and/or merchandise security device <NUM> may be provided with only a transient memory, such that the SDC must be programmed (or reprogrammed) at predetermined time intervals. In this instance, programming station <NUM> is provided to initially program and/or to subsequently reprogram the SDC into the key <NUM>. As will be described, key <NUM> may be operable to initially program and/or to subsequently reprogram the merchandise security device <NUM> with the SDC. Key <NUM> is then further operable to operate the merchandise security device <NUM> by transferring power and/or data to the device, as will be described.

In the exemplary embodiment of the system illustrated in <FIG>, electronic key <NUM> is configured to be programmed with a unique SDC by the programming station <NUM>. In some embodiments, the key <NUM> is presented to the programming station <NUM> and communication therebetween is initiated, for example, by pressing or otherwise actuating a control button <NUM> provided on the exterior of the key. Communication between the programming station <NUM> and the key <NUM> may be accomplished directly, for example by one or more electrical contacts, or indirectly, for example by wireless communication. Any form of wireless communication capable of transferring data between the programming station <NUM> and key <NUM> is also possible, including without limitation optical transmission, acoustic transmission or magnetic induction. In some embodiments shown and described herein, communication between programming station <NUM> and key <NUM> is accomplished by wireless optical transmission, and more particularly, by cooperating infrared (IR) transceivers provided in the programming station and the key. In some embodiments, the programming station <NUM> may function similarly to that disclosed in <CIT> entitled PROGRAMMING STATION FOR A SECURITY SYSTEM FOR PROTECTING MERCHANDISE.

For the purpose of describing some embodiments of the present invention, it is sufficient that the programming station comprises at least a logic control circuit for generating or being provided with a SDC, a memory for storing the SDC, and a communications system suitable for interacting with the electronic key <NUM> in the manner described herein to program the key with the SDC.

An available feature of a merchandise security system <NUM> according to one embodiment is that the electronic key <NUM> may include a time-out function. More particularly, the ability of the key <NUM> to transfer data and/or power to the merchandise security device <NUM> may be deactivated after a predetermined time period. By way of example, the electronic key <NUM> may be deactivated after about six to about twenty-four hours from the time the key was programmed or last refreshed. In this manner, an authorized sales associate typically must program or refresh the key <NUM> assigned to him at the beginning of each work shift. Furthermore, the charging station <NUM> may be configured to deactivate the electronic key <NUM> when the key is positioned within or otherwise engaged with a charging port <NUM> (see, e.g., <FIG>). In this manner, the charging station <NUM> can be made available to an authorized sales associate. In one embodiment, the electronic key <NUM> may be authorized upon the sales associate inputting an authorized code to release the key for use. For instance, the sales associate may input a code on a keypad in communication with the charging station <NUM>. Upon inputting the correct code, the charging station <NUM> may indicate which key <NUM> is authorized for use by the sales associate (e.g., via an audible and/or a visible indicator). In some cases, the time-out period may be predetermined or customized by a user. For example, a manager of a retail store may input a particular time period for one or more of the electronic keys <NUM>. Those electronic keys <NUM> that are "active" may be monitored via communication within the cloud-based network. In other embodiments, the electronic key <NUM> may be timed out or otherwise disabled in response to an event. For instance, the electronic key <NUM> may be disabled in response to the key being misplaced or stolen, or keys being brought into a retail store that are not authorized for use. Such disabling may occur via a command sent to the electronic key <NUM> via the cloud <NUM>.

In one embodiment, commands may be provided remotely for taking various actions. For example, where a theft has occurred, a command may be provided from a remote location or device <NUM> (e.g., a tablet or computer) to lock and/or arm all or a portion of the merchandise security devices <NUM>. Similarly, a command may be provided from a remote location or device <NUM> to deactivate all or a portion of the electronic keys <NUM>. As such, the system <NUM> provides techniques for centralized security and control of the electronic keys <NUM>, merchandise security devices <NUM>, and other components within the system.

<FIG> illustrate one embodiment of an electronic key <NUM>. The electronic key <NUM> may include a control button <NUM> for activating the key, such as for initiating communication with a merchandise security device. Moreover, the electronic key <NUM> may also include one or more visual indicators. In this regard, the key <NUM> may include one or more status indicators <NUM> that illustrate a status of the communication of the key with a merchandise security device <NUM>. The status indicators <NUM> may guide the user to know when communication between the key <NUM> and the merchandise security device <NUM> is taking place and has been completed. The status indicators <NUM> may be different depending on whether the communication was authorized (e.g., unlocked or disarmed), unauthorized (e.g., wrong zone or department), or unsuccessful. The status indicators <NUM> may also indicate an amount of time of authorized use remaining on the key <NUM>, such as where the key includes a time-out feature as discussed above. The electronic key <NUM> may also include one or more other indicators <NUM> that provide a visual indication of the power remaining on the key. These other indicators <NUM> may also be used for any other desired purpose, such as to indicate a programming state of the key <NUM>. For example, the indicators <NUM> may be activated while the electronic key <NUM> is being initially programmed. It is understood that the illustrated status indicators <NUM>, <NUM> are for illustration only, as various types and configurations of indicators may be employed in alternative embodiments.

<FIG> illustrate additional embodiments of electronic keys <NUM>. In these examples, the electronic key <NUM> includes a removable portion <NUM>. In <FIG>, the removable portion <NUM> allows access to an input power port <NUM>, such as for recharging the electronic key <NUM>. The removable portion <NUM> may be configured to slide relative to the electronic key <NUM> to expose the input power port <NUM>. The input port <NUM> may be configured to receive and electrically connect to a corresponding connector, such as a connector associated with the charging station <NUM>. For instance, the electronic key <NUM> may be configured to be docked within the charging station <NUM> for charging thereof (see, e.g., <FIG>). As shown in <FIG>, the removable portion <NUM> may also be configured to be removed entirely from the electronic key <NUM> and may be multi-purpose in that it may be include a tool portion <NUM>. For example, the tool portion <NUM> may be used for facilitating the disconnection of various connectors, as a screwdriver, etc. The electronic key <NUM> may include an opening <NUM> defined to receive the removable portion <NUM> therein in a non-use position.

<FIG> show additional embodiments of an electronic key <NUM>'. In this embodiment, the electronic key <NUM>' includes one or more alignment features <NUM> for facilitating alignment with a programming or authorization station <NUM>' and/or a charging station <NUM>' as discussed in further detail below. In addition, the electronic key <NUM>' includes an input port <NUM> (e.g., a micro-USB port) which may be configured to releasably engage a corresponding port on the programming or authorization station <NUM>' and/or the charging station <NUM>' for data and/or power transfer. Notably in the example shown in <FIG>, the input port <NUM> on the electronic key <NUM>' is on a side surface, while a pair of alignment features <NUM> are provided on opposite surfaces of the electronic key. In the embodiment shown in <FIG>, a single alignment feature <NUM> is provided. The input port <NUM> may be located on a side surface between a transfer port at one end and a key chain ring opening at an opposite end. Positioning of the input port <NUM> on a side surface of the electronic key <NUM>' may provide for a more secure and stable attachment to the programming or authorization station <NUM>' and/or the charging station <NUM>'. A series of status indicators <NUM>, <NUM>, as discussed above, for example light-emitting diodes (LEDs) may be provided on the exterior of the electronic key <NUM>' for indicating the operating status thereof.

As shown in <FIG>, the programming station <NUM> comprises a housing configured to contain the logic control circuit that generates the SDC, the memory that stores the SDC, and a communications system for communicating the SDC to the key (e.g., wirelessly). In use, the logic control circuit generates the SDC, which may be a predetermined (i.e. "factory preset") security code, a manually input security code, or a security code that is randomly generated by the logic control circuit. In the latter instance, the logic control circuit further comprises a random number generator for producing the unique SDC. A series of visual indicators, for example light-emitting diodes (LEDs) may be provided on the exterior of the housing for indicating the operating status of the programming station <NUM>. Programming station <NUM> may further be provided with an access mechanism for preventing use of the programming station by an unauthorized person. For example, the programming station may include a keypad <NUM>. An authorized user may input a code in the key pad <NUM> that allows the programming station <NUM> to generate a SDC for communicating to the key <NUM>.

In a particular embodiment, the logic control circuit of the programming station <NUM> performs an electronic exchange of data with a logic control circuit of the key, commonly referred to as a "handshake communication protocol. " The handshake communication protocol determines whether the key <NUM> is an authorized key that has not been programmed previously (e.g., a "new" key), or is an authorized key that is being presented to the programming station <NUM> a subsequent time to refresh the SDC. In the event that the handshake communication protocol fails, the programming station <NUM> will not provide the SDC to the unauthorized device attempting to obtain the SDC. When the handshake communication protocol succeeds, programming station <NUM> permits the SDC to be transmitted by the key <NUM>. As will be readily apparent to those skilled in the art, the SDC may be transmitted from the programming station <NUM> to the key <NUM> by any suitable means, including without limitation, wireless, electrical contacts or electromechanical, electromagnetic or magnetic conductors, as desired. Moreover, in other cases the programming station <NUM> may simply provide the SDC to the electronic key <NUM> without first initiating any handshake communication protocol.

In some embodiments, the merchandise security device <NUM> is a "passive" device. As used herein, the term passive is intended to mean that the security device <NUM> does not have an internal power source sufficient to lock and/or unlock a mechanical lock mechanism. Significant cost savings are obtained by a retailer when the merchandise security device <NUM> is passive since the expense of an internal power source is confined to the key <NUM>, and one such key is able to operate multiple security devices. If desired, the merchandise security device <NUM> may also be provided with a temporary power source (e.g., capacitor or limited-life battery) having sufficient power to activate an alarm, for example a piezoelectric audible alarm, that is actuated by a sensor, for example a contact, proximity or limit switch, in response to a security breach. The temporary power source may also be sufficient to communicate data, for example a SDC, from the merchandise security device <NUM> to the key <NUM> to authenticate the security device and thereby authorize the key to provide power to the security device.

In some embodiments, the merchandise security device <NUM> further comprises a logic control circuit, similar to the logic control circuit disposed within the key <NUM>, adapted to perform a handshake communication protocol with the logic control circuit of the key in essentially the same manner as that between the programming station <NUM> and the key. In essence, the logic control circuit of the key <NUM> and the logic control circuit of the merchandise security device <NUM> communicate with each other to determine whether the merchandise security device is an authorized device that does not have a security code, or is a device having a matching SDC. In the event the handshake communication protocol fails (e.g., the device is not authorized or the device has a non-matching SDC), the key <NUM> will not program the device with the SDC, and consequently, the merchandise security device will not operate. If the merchandise security device <NUM> was previously programmed with a different SDC, the device will no longer communicate with the key <NUM>. In the event the handshake communication protocol is successful, the key <NUM> permits the SDC stored in the key to be transmitted to the merchandise security device <NUM> to program the device with the SDC. As will be readily apparent to those skilled in the art, the SDC may be transmitted from the key <NUM> to the merchandise security device <NUM> by any suitable means, including without limitation, via radiofrequency, one or more electrical contacts, electromechanical, electromagnetic or magnetic conductors, as desired. Furthermore, the SDC may be transmitted by inductive transfer of data from the electronic key <NUM> to the merchandise security device <NUM>. Moreover, in other cases the electronic key <NUM> may simply provide the SDC to the merchandise security device <NUM> without first initiating any handshake communication protocol.

In one embodiment, when the handshake communication protocol is successful and the merchandise security device <NUM> is an authorized device having the matching SDC, the merchandise security device may be armed or disarmed, such as where the security device includes an alarm circuit. In other embodiments, the merchandise security device <NUM> may be armed or disarmed when the SDC codes match. In some embodiments, when the handshake communication protocol is successful and the SDC codes match, the logic control circuit of the key <NUM> causes an internal power source of the key to transfer electrical power to the device <NUM> to operate a mechanical lock mechanism. In other embodiments, the merchandise security device <NUM> may be locked or unlocked when the SDC codes match and power is transferred to the merchandise security device. It is understood that various information and codes may be exchanged in order to perform the desired function, such as arming, disarming, locking, or unlocking the merchandise security device <NUM>. For example, the data exchanged may include a serial number of the merchandise security device alone and/or an SDC.

<FIG> shows one embodiment of a merchandise security device <NUM> in greater detail. As previously mentioned, the merchandise security device <NUM> can be any type of security device that utilizes an alarm circuit and/or a lock mechanism that locks and/or unlocks a lock. In some cases, the merchandise security device <NUM> may be a passive device in the sense that it does not have an internal power source sufficient to operate a lock mechanism. As a result, the merchandise security device <NUM> may be configured to receive power, or alternatively, both power and data, from an external source, such as the electronic key <NUM> shown and described herein. The embodiment of the merchandise security device depicted in <FIG> is a cabinet lock configured to be securely affixed to the locking arm <NUM> of a conventional cabinet lock bracket <NUM>. As previously described, the cabinet lock <NUM> may include a logic control circuit for performing a handshake communication protocol with the logic control circuit of the key <NUM> and for receiving the SDC from the key. In other embodiments, the cabinet lock <NUM> may be configured to transmit the SDC to the key <NUM> to authenticate the security device and thereby authorize the key to transfer power to the security device.

<FIG> show an embodiment of an electronic key <NUM> with inductive transfer in greater detail. As previously mentioned, the key <NUM> may be configured to transfer both data and power to a merchandise security device <NUM>. Accordingly, the programmable electronic key <NUM> may be an active device in the sense that it has an internal power source sufficient to operate a mechanical lock mechanism of the merchandise security device <NUM>. As a result, the programmable electronic key <NUM> may be configured to transfer both data and power from an internal source, such as a logic control circuit (e.g., data) and a battery (e.g., power) disposed within the key. The embodiment of the programmable electronic key <NUM> depicted herein is a key with inductive transfer capability configured to be received within the transfer port <NUM> of the cabinet lock <NUM> shown in <FIG>, as well as a programming port <NUM> of the programming station and the charging port <NUM> of the charging station.

In some embodiments, the electronic key <NUM> comprises a housing <NUM> having an internal cavity or compartment that contains the internal components of the key, including without limitation the logic control circuit, memory, communication system and battery, as will be described. As shown, the housing <NUM> is formed by a lower portion <NUM> and an upper portion <NUM> that are joined together after assembly, for example by ultrasonic welding. The electronic key <NUM> further defines an opening <NUM> at one end for coupling the key to a key chain ring, lanyard or the like. The electronic key <NUM> may further comprise a transfer probe <NUM> located at an end of the housing <NUM> opposite the opening <NUM> for transferring data and/or power to the merchandise security device <NUM>. The transfer probe <NUM> is also operable to transmit and receive a handshake communication protocol and the SDC from the programming station <NUM>, as previously described, and to receive power from a charging station.

As best shown in <FIG>, an internal battery <NUM> and a logic control circuit, or printed circuit board (PCB) <NUM> are disposed within the housing <NUM> of the electronic key <NUM>. Battery <NUM> may be a conventional extended-life replaceable battery or a rechargeable battery suitable for use with the charging station <NUM>. The logic control circuit <NUM> is operatively coupled and electrically connected to a switch <NUM> that is actuated by the control button <NUM> provided on the exterior of the key <NUM> through the housing <NUM>. Control button <NUM> in conjunction with switch <NUM> controls certain operations of the logic control circuit <NUM>, and in particular, transmission of the data and/or power. In that regard, the logic control circuit <NUM> is further operatively coupled and electrically connected to a communication system <NUM> for transferring data and/or power. In one embodiment, the communication system <NUM> is a wireless infrared (IR) transceiver for optical transmission of data between the electronic key <NUM> and the programming station, and between the key and the merchandise security device <NUM>. As a result, the transfer probe <NUM> of the key <NUM> may be provided with an optically transparent or translucent filter window <NUM> for emitting and collecting optical transmissions between the key <NUM> and the programming station <NUM>, or between the key and the merchandise security device <NUM>, as required. Transfer probe <NUM> may further comprise an inductive core <NUM> and inductive core windings <NUM> for transferring electrical power to the merchandise security device <NUM> and/or receiving electrical power from the charging station <NUM> to charge the internal battery <NUM>, as required. Alternatively, the optical transceiver <NUM> may be eliminated and data transferred between the programmable electronic key <NUM> and the merchandise security device <NUM> via magnetic induction through the inductive coil <NUM>.

In some embodiments, an important aspect of an electronic key <NUM>, especially when used for use in conjunction with a merchandise security device <NUM> as described herein, is that the key does not require a physical force to be exerted by a user on the key to operate the mechanical lock mechanism of the merchandise security device. By extension, no physical force is exerted by the key <NUM> on the mechanical lock mechanism. As a result, the key <NUM> cannot be unintentionally broken off in the lock, as often occurs with conventional mechanical key and lock mechanisms. Furthermore, neither the key <NUM> nor and the mechanical lock mechanism suffer from excessive wear as likewise often occurs with conventional mechanical key and lock mechanisms. In addition, in some cases there is no required orientation of the transfer probe <NUM> of the electronic key <NUM> relative to the ports on any one of the programming station, charging station, and/or the merchandise security device <NUM>. Accordingly, any wear of the electrical contacts on the transfer probe <NUM> and ports may be minimized. As a further advantage in some embodiments, an authorized person is not required to position the transfer probe <NUM> of the electronic key <NUM> in a particular orientation relative to the transfer port <NUM> of the merchandise security device <NUM> and thereafter exert a compressive and/or torsional force on the key to operate the mechanical lock mechanism of the device.

<FIG> illustrate an embodiment of a programming or authorization station <NUM>'. As illustrated, the programming or authorization station <NUM>' includes a geometry for receiving the electronic key <NUM>' as discussed above (see, e.g., <FIG>). In this regard, the programming or authorization station <NUM>' may include one or more alignment features <NUM>' configured to align with and engage alignment feature <NUM> of the electronic key <NUM>'. Moreover, the programming or authorization station <NUM>' may further define a recess <NUM> for at least partially receiving a side surface of the electronic key <NUM>'. The recess <NUM> may be curved or any other shape for corresponding to the shape of the electronic key <NUM>'. Within the recess <NUM>, the programming or authorization station <NUM>' may include a port <NUM>' for releasably engaging the input port <NUM> of the electronic key <NUM>'. The alignment features <NUM>, <NUM>' are configured to align with one another to ensure that the input port <NUM> and port <NUM>' align with and engage one another. Such engagement may allow for data communication between the electronic key <NUM>' and the programming or authorization station <NUM>', which may occur in some cases, upon entry of an authorized code using keypad <NUM>. In addition, the programming or authorization station <NUM>' may include one or more input ports <NUM> for receiving power and data communication (e.g., an Ethernet port).

<FIG> shows a charging station <NUM> in greater detail. As previously mentioned, the charging station <NUM> recharges the internal battery <NUM> of the key <NUM>. In certain instances, the charging station <NUM> also deactivates the data transfer and/or power transfer capability of the key <NUM> until the key has been reprogrammed with the SDC by the programming station <NUM> or the user provides an authorized code to the charging station. Regardless, the charging station <NUM> comprises a housing for containing the internal components of the charging station. The exterior of the housing has at least one, and preferably, a plurality of charging ports <NUM> formed therein that are sized and shaped to receive the electronic key <NUM> (see, e.g., <FIG>). Mechanical or magnetic means may be provided for properly positioning and securely retaining the key <NUM> within the charging port <NUM> for ensuring proper power transfer.

<FIG> show an embodiment of a charging station <NUM> wherein a plurality of ports <NUM> are provided for engagement with a plurality of corresponding electronic keys <NUM>'. The electronic key <NUM>' shown in <FIG> may be compatible with the charging station <NUM> shown in <FIG> whereby the electronic key <NUM>' includes an input port <NUM> on its side for engagement with the port <NUM>, similar to that described in conjunction with programming or authorization station <NUM>'. Likewise, each port <NUM> may be located within a respective recess <NUM> for receiving at least a side surface of the electronic key <NUM>'. This arrangement may allow for a greater number of electronic keys <NUM>' to be engaged with the charging station <NUM> at any one time.

<FIG> show additional embodiments of a merchandise security device <NUM>. In this embodiment, the merchandise security device <NUM> comprises a lock mechanism that utilizes "energy harvesting". Thus, the merchandise security device <NUM> may be a passive device as described above. However, in this embodiment, the merchandise security device <NUM> includes means for generating power to be stored. For example, the merchandise security device <NUM> may be configured to rotate between locked and unlocked positions and include a generator configured to generate energy to be stored (e.g., via a capacitor). In some cases, the merchandise security device <NUM> may include a bezel and each turn of the bezel may generate an electrical charge to be stored. In one embodiment, the electronic key <NUM> may be used initially to disengage a mechanical lock, and then the merchandise security device <NUM> may be rotated to an unlocked position. The merchandise security device <NUM> may then be rotated back to the locked position. Since the merchandise security device <NUM> has no power source, the security device is capable of performing various security functions using the stored power. For instance, the merchandise security device <NUM> may be configured to use the stored power to push data to one or more nodes <NUM> or to generate audible and/or visible signals. In one example, the merchandise security device <NUM> may include an internal radio for transmitting wireless signals using the stored power, such as for generating a distress signal when the security device is tampered with. In another example, the merchandise security device <NUM> may include a light-emitting device (LED) that is powered by the stored power. In some embodiments, techniques for energy harvesting may be similar to that described in <CIT>.

Claim 1:
A merchandise security system (<NUM>) comprising:
a plurality of merchandise security devices (<NUM>) located within a retail store, each merchandise security device (<NUM>) having one serial number; and
a plurality of electronic keys (<NUM>), wherein each electronic key (<NUM>) is configured to store a plurality of the serial numbers, and wherein two or more of the electronic keys (<NUM>) store different combinations of the serial numbers,
wherein at least one of the electronic keys (<NUM>) is configured to be authorized for locking, unlocking, arming, and/or disarming one or more merchandise security devices (<NUM>) within the retail store, and
wherein one of the electronic keys (<NUM>) is configured to communicate with a merchandise security device (<NUM>) and to determine, whether one of the plurality of the serial numbers stored by the electronic key (<NUM>) matches the serial number of the merchandise security device (<NUM>), wherein the electronic key (<NUM>) is configured to lock, unlock, arm, and/or disarm the merchandise security device (<NUM>) in response to one of the plurality of the serial numbers stored by the electronic key (<NUM>) matching the serial number of the merchandise security device (<NUM>).