U.S. patent application number 14/629952 was filed with the patent office on 2015-06-18 for cabinet lock key with audio indicators.
The applicant listed for this patent is InVue Security Products Inc.. Invention is credited to Christopher J. Fawcett, Jeffrey A. Grant, William M. Warren.
Application Number | 20150170487 14/629952 |
Document ID | / |
Family ID | 49580860 |
Filed Date | 2015-06-18 |
United States Patent
Application |
20150170487 |
Kind Code |
A1 |
Grant; Jeffrey A. ; et
al. |
June 18, 2015 |
CABINET LOCK KEY WITH AUDIO INDICATORS
Abstract
An electronic key for a merchandise security device is provided.
The electronic key may include electronic circuitry for providing
electrical power to a lock mechanism for locking and unlocking the
lock mechanism. The electronic key may also include an audio
component configured to indicate a status of the lock
mechanism.
Inventors: |
Grant; Jeffrey A.;
(Charlotte, NC) ; Fawcett; Christopher J.;
(Charlotte, NC) ; Warren; William M.; (Fort Mill,
SC) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
InVue Security Products Inc. |
Charlotte |
NC |
US |
|
|
Family ID: |
49580860 |
Appl. No.: |
14/629952 |
Filed: |
February 24, 2015 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
13897790 |
May 20, 2013 |
8994497 |
|
|
14629952 |
|
|
|
|
61649539 |
May 21, 2012 |
|
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|
Current U.S.
Class: |
340/572.1 |
Current CPC
Class: |
G07C 9/00896 20130101;
G07C 2009/00936 20130101; G07C 9/00857 20130101; G08B 13/02
20130101; G07C 2209/62 20130101 |
International
Class: |
G08B 13/02 20060101
G08B013/02 |
Claims
1. A security system for protecting an item of merchandise from
theft, comprising: an electronic key; and a plurality of
merchandise security devices each comprising a lock mechanism that
is configured to be locked or unlocked in response to receiving
electrical power transferred from the electronic key to the lock
mechanism, wherein the electronic key is incapable of unlocking a
second lock mechanism prior to locking a first lock mechanism that
has been successfully unlocked.
2. The security system according to claim 1, wherein the electrical
power is configured to transferred from the electronic key via
inductive transfer.
3. The security system according to claim 1, wherein the electronic
key comprises an audio component.
4. The security system according to claim 3, wherein the audio
component is configured to emit an audible signal using a
piezo.
5. The security system according to claim 3, wherein the audio
component is configured to emit a first audible signal indicative
of successfully changing a state of the first lock mechanism and a
second audible signal that is different than the first audible
signal and that is indicative of unsuccessfully changing a state of
the second lock mechanism.
6. The security system according to claim 3, wherein the audio
component is configured to emit an audible signal in response to
the lock mechanism being locked or unlocked.
7. The security system according to claim 3, wherein the audio
component is configured to indicate a status of the lock mechanism
based on the change in state thereof.
8. The security system according to claim 7, wherein the audio
component is configured to emit a first audible signal indicative
of successfully changing a state of the lock mechanism and a second
audible signal that is different than the first audible signal and
that is indicative of unsuccessfully changing a state of the lock
mechanism.
9. The security system according to claim 7, wherein the audio
component is configured to continuously or intermittently emit an
audible signal while the lock mechanism is in an unlocked
state.
10. The security system according to claim 7, wherein the audio
component is configured to emit: (i) an initial audio indication in
response to the lock mechanism being unlocked, (ii) a first audio
indication while the lock mechanism is in an unlocked state, and
(iii) a second audio indication in response to unsuccessfully
changing the state of the lock mechanism, and wherein each of the
initial, first, and second audio indications are different than one
another.
11. The security system according to claim 1, wherein the
electronic key comprises electronic circuitry configured to
communicate a communications protocol signal between the electronic
key and the lock.
12. The security system according to claim 11, wherein the
communications protocol signal comprises a security code.
13. The security system according to claim 1, wherein the
electronic key is configured to receive a signal transmitted from
the lock mechanism indicating a change in state thereof.
14. A method for protecting an item of merchandise susceptible to
theft, comprising: transferring electrical power from an electronic
key to a first lock to thereby lock or unlock the first lock,
wherein the electronic key is incapable of unlocking a second lock
prior to locking the first lock that has been successfully
unlocked.
15. The method according to claim 14, further comprising emitting
an audible signal with the electronic key in response to a change
in state of the first lock.
16. The method according to claim 15, wherein emitting comprises
emitting a first audible signal indicative of successfully changing
a state of the first lock and emitting a second audible signal that
is different than the first audible signal and that is indicative
of unsuccessfully changing a state of the second lock.
17. The method according to claim 15, wherein emitting comprises
continuously or intermittently emitting an audible signal while the
first lock is in an unlocked state.
18. The method according to claim 14, further comprising
communicating a communications protocol signal between the
electronic key and the first lock.
19. The method according to claim 14, wherein transferring
comprises inductively transferring electrical power.
20. The method according to claim 14, further comprising receiving
a signal at the electronic key transmitted from the first lock
indicating a change in state thereof.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation of U.S. application Ser.
No. 13/897,790 filed on May 20, 2013, which claims the benefit of
U.S. Provisional Application No. 61/649,539 filed on May 21, 2012,
each of which is hereby incorporated by reference in its
entirely.
FIELD OF THE INVENTION
[0002] Embodiments of the present invention relate generally to
merchandise display security systems and methods for protecting an
item of merchandise from theft. More particularly, embodiments of
the present invention relate to an electronic key for a merchandise
security device.
BACKGROUND OF THE INVENTION
[0003] It is common practice for retailers to store and/or display
relatively expensive items of merchandise on or within a
merchandise security device, such as a security display (e.g.
alarming stand), security fixture (e.g. locking hook, shelf,
cabinet, etc.) or security packaging (e.g. merchandise keeper).
Regardless, the security device stores and/or displays an item of
merchandise so that a potential purchaser may view, and in some
instances, interact with the item before making a decision whether
to purchase the item. At the same time, the item is secured on or
within the merchandise security device so as to prevent, or at
least deter, theft of the item. The value of the item, however, may
make it an attractive target for a shoplifter despite the presence
of a merchandise security device. A determined shoplifter may
attempt to detach the item from the security display or to remove
the item from the security fixture or from within the security
packaging. Alternatively, the shoplifter may attempt to remove the
all or a portion of the security device from the display area along
with the item.
[0004] In the case of a secure display or fixture, the security
device is oftentimes firmly attached to a support, such as a
pegboard, wire grid, horizontal bar rack, slatwall (also known as
slatboard), wall, table, desk, countertop or like structure. In
some instances, the security device is secured to the support using
a mechanical lock mechanism operated by a non-programmable key, for
example a conventional tumbler lock or a magnetic lock. In other
instances, the security device is secured to the support using an
electronic lock mechanism operated by a programmable key or
remote.
[0005] There are known locking systems that utilize a key to
transfer power from the key to a lock or locking device using
inductive power transfer technology. Some cabinet locks include a
visual indicator on the cabinet lock to indicate the status of the
lock. However, there is no known power transfer key that includes
an audio indicator for indicating the status of the lock or locking
device operated by the key.
[0006] Accordingly, there exists a need for an improved
programmable key for operating a merchandise security device. There
also exists a need for a programmable key that is configured to
provide an audio indicator indicative of the status of a lock
mechanism.
BRIEF SUMMARY OF THE INVENTION
[0007] According to embodiments of the present invention, an
electronic key for a merchandise security device is provided. The
electronic key includes electronic circuitry for providing
electrical power to a lock mechanism for locking and unlocking the
lock mechanism. The electronic key further includes an audio
component configured to indicate a status of the lock mechanism.
For example, the audio component may be configured to emit an
audible signal in response to the lock mechanism being locked or
unlocked. In some embodiments, the audio component is configured to
emit a first audible signal and a second audible signal that is
different than the first audible signal. The audible signal may be
continuous or intermittent.
[0008] According to another embodiment, a method for protecting an
item of merchandise from theft is provided. The method includes
transferring electrical power from an electronic key to a lock to
thereby lock or unlock the lock and emitting an audible signal with
the electronic key in response to a change in state of the
lock.
BRIEF DESCRIPTION OF THE DRAWINGS
[0009] The detailed description of the invention provided below may
be better understood with reference to the accompanying drawing
figures, which depict one or more exemplary embodiments of an
electronic key for use with a merchandise security device in a
merchandise display security system and method according to the
invention.
[0010] FIG. 1A shows an exemplary embodiment of a merchandise
display security system and method including a programmable
electronic key, a merchandise security device, a programming
station and a charging station according to the invention.
[0011] FIG. 1B is an enlarged view showing the programmable
electronic key of FIG. 1A positioned on the programming station of
FIG. 1A to be programmed with a security code.
[0012] FIG. 2 further shows the system and method of FIG. 1A with
the programmable electronic key positioned to operate the
merchandise security device.
[0013] FIG. 3A further shows the system and method of FIG. 1A with
the programmable electronic key disposed on the charging
station.
[0014] FIG. 3B is an enlarged view showing the programmable
electronic key of FIG. 1A positioned on the charging station of
FIG. 1A to recharge a power source disposed within the key.
[0015] FIG. 4 is an enlarged view showing the merchandise security
device of the system and method of FIG. 1A.
[0016] FIG. 5 is an enlarged view showing the programmable
electronic key of the system and method of FIG. 1A in greater
detail.
[0017] FIG. 6 is an exploded view of the programmable electronic
key of FIG. 5.
[0018] FIG. 7A is a perspective view of the programmable electronic
key of FIG. 5.
[0019] FIG. 7B is an end view of the programmable electronic key of
FIG. 5.
[0020] FIG. 8 is a perspective view showing a lengthwise
cross-section of the programmable electronic key of FIG. 5.
[0021] FIG. 9A is a top view showing the charging station of the
system and method of FIG. 1A.
[0022] FIG. 9B is a perspective view showing a diagonal
cross-section of the charging station of FIG. 9A taken along the
line 9B-9B.
[0023] FIG. 10 shows another embodiment of a merchandise display
security system and method including a programmable electronic key,
a merchandise security device, a programming station and a charging
station according to the invention.
[0024] FIG. 11 is an enlarged view showing the programmable
electronic key of FIG. 10 positioned on the charging station of
FIG. 10 to recharge a power source disposed within the key.
[0025] FIG. 12 is an enlarged view showing the merchandise security
device of the system and method of FIG. 10.
[0026] FIG. 13 is an enlarged view showing the programmable
electronic key of the system and method of FIG. 10 in greater
detail.
[0027] FIG. 14 is a perspective view showing a pair of matched
coils for use with the programmable electronic key and the
merchandise security device of FIG. 10.
[0028] FIG. 15A is a perspective view of the programmable
electronic key of FIG. 13.
[0029] FIG. 15B is an end view of the programmable electronic key
of FIG. 13.
[0030] FIG. 16 is a perspective view showing a lengthwise
cross-section of the programmable electronic key of FIG. 13.
[0031] FIG. 17A is a top view showing the charging station of the
system and method of FIG. 10.
[0032] FIG. 17B is a perspective view showing a diagonal
cross-section of the charging station of FIG. 17A taken along the
line 17B-17B.
[0033] FIG. 18 is a top view of another embodiment of an electronic
key.
[0034] FIGS. 19 and 20 are state diagrams depicting "Desired Lock"
and "Desired Relock" experiences according to embodiments of the
present invention.
[0035] FIGS. 21 and 22 are state diagrams depicting "Undesired
Unlock" and "Undesired Relock" experiences according to embodiments
of the present invention.
DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION
[0036] As explained in greater detail below, embodiments of the
present invention are directed to an electronic key for a cabinet
lock including one or more audio indicators for indicating the
status of the cabinet lock. In one embodiment, the electronic key
includes electronic circuitry and an audio component (e.g., a piezo
or piezoelectric alarm) that provides a first audio indication
indicating to a user the cabinet lock is in an unlocked (unsecured)
condition. In another embodiment, the key includes electronic
circuitry and an audio component that provides a second audio
indication different from the first audio indication indicating to
a user the status of the cabinet lock was not successfully changed,
and more particularly, the status of the cabinet lock was not
changed from a locked stated to an unlocked state or from an
unlocked state to a locked state.
[0037] In some embodiments, the electronic lock and the electronic
key are similar to those disclosed in U.S. Patent Publ. No.
2013/0081434, entitled Cabinet Lock for Use with Programmable
Electronic Key and filed Sep. 28, 2012, U.S. Patent Publ. No.
2012/0047972, entitled Electronic Key for Merchandise Security
Device and filed Aug. 31, 2011, and U.S. Patent Publ. No.
2011/0254661, entitled Programmable Security System and Method for
Protecting Merchandise and filed Jun. 27, 2011. In other
embodiments, the electronic lock and the electronic key are similar
to those manufactured by InVue Security Products Inc., including
the Plunger Locks, Smart Locks, and IR2 and IR2-S Keys.
[0038] Referring now to the accompanying drawing figures wherein
like reference numerals denote like elements throughout the various
views, one or more exemplary embodiments of a merchandise display
security system and method are shown. In the exemplary embodiments
shown and described herein, the system and method include a
programmable electronic key, indicated generally at 20, 120, 200
and a merchandise security device, indicated generally at 40, 140.
Merchandise security devices 40, 140 suitable for use with the
programmable electronic keys 20, 120, 200 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, a programmable electronic key (also referred to herein as
a merchandise security key) according to the invention is useable
with any security device or locking device that utilizes power
transferred from the key to operate a mechanical lock mechanism
and/or utilizes data transferred from the key to authorize the
operation of an electronic lock mechanism, such as an alarm
circuit. In other words, a programmable electronic key according to
the invention 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.
It should be noted that although the invention is described with
respect to embodiments including a programmable electronic key for
transferring data and electrical power to a merchandise security
device to operate a mechanical lock mechanism, the invention is
equally applicable to an electronic key for transferring only
electrical power to a merchandise security device to operate any
component of the merchandise security device, whether or not the
device includes an internal or external power source for operating
another component of the device.
[0039] One embodiment of a merchandise display system and method
according to the invention is illustrated in FIGS. 1A-9B. The
embodiment of the merchandise display security system and method
depicted comprises a programmable electronic key 20, which is also
referred to herein as a merchandise security key, and a merchandise
security device 40 that is configured to be operated by the key.
The system and method may further comprise an optional programming
station, indicated generally at 60, that is operable for
programming the key 20 with a security code, which is also referred
to herein as a Security Disarm Code (SDC). In addition to
programming station 60, the system and method may further comprise
an optional charging station, indicated generally at 80, that is
operable for initially charging and/or subsequently recharging a
power source disposed within the key 20. For example, merchandise
security key 20 and merchandise security device 40 may each be
programmed with the same SDC into a respective permanent memory.
The merchandise security key 20 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 80 is provided to initially
charge and/or to subsequently recharge the power source provided
within the merchandise security key 20. Furthermore, key 20 and/or
merchandise security device 40 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 60 is provided to initially program and/or to
subsequently reprogram the SDC into the key 20. As will be
described, key 20 is operable to initially program and/or to
subsequently reprogram the merchandise security device 40 with the
SDC. Key 20 is then further operable to operate the merchandise
security device 40 by transferring power and/or data to the device,
as will be described.
[0040] In the embodiment of the system and method illustrated in
FIGS. 1A-9B, programmable electronic key 20 is configured to be
programmed with a unique SDC by the programming station 60. A
programming station 60 suitable for use with the present invention
is shown and described in detail in U.S. Pat. No. 7,737,844
entitled PROGRAMMING STATION FOR A SECURITY SYSTEM FOR PROTECTING
MERCHANDISE, the disclosure of which is incorporated herein by
reference in its entirety. As illustrated in FIG. 1A and best shown
in enlarged FIG. 1B, the key 20 is presented to the programming
station 60 and communication therebetween is initiated, for example
by pressing a control button 22 provided on the exterior of the
key. Communication between the programming station 60 and the key
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 60 and key 20 is also possible, including
without limitation optical transmission, acoustic transmission or
magnetic induction. In the embodiments shown and described herein,
communication between programming station 60 and key 20 is
accomplished by wireless optical transmission, and more
particularly, by cooperating infrared (IR) transceivers provided in
the programming station and the key. In one embodiment, 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
programmable electronic key 20 in the manner described herein to
program the key with the SDC.
[0041] As shown in FIG. 1B, programming station 60 comprises a
housing 61 configured to contain the logic control circuit that
generates the SDC, the memory that stores the SDC, and a
communications system, namely an optical transceiver, for
wirelessly communicating the SDC to a cooperating optical
transceiver disposed within the key 20. In use, the logic control
circuit generates the SDC, which may be a predetermined (i.e.
"factory preset") security code, or which may be a security code
that is randomly generated by the logic control circuit of the
programming station 60 at the time a first key 20 is presented to
the station for programming. 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) 67 may be provided on the
exterior of the housing 61 for indicating the operating status of
the programming station. As shown herein, the programming station
60 may be operatively connected to an external power source by a
power cord 70 having at least one conductor. Alternatively, the
programming station 60 may comprise an internal power source, for
example an extended-life replaceable battery or a rechargeable
battery, for providing power to the logic control circuit and the
LEDs 67.
[0042] In a particular embodiment, the logic control circuit of the
programming station 60 performs an electronic exchange of data with
a logic control circuit of the key 20, commonly referred to as a
"handshake communication protocol." The handshake communication
protocol determines whether the key is an authorized key that has
not been programmed previously (i.e. a "new" key), or is an
authorized key that is being presented to the programming station a
subsequent time to refresh the SDC. In the event that the handshake
communication protocol fails, the programming station 60 will not
provide the SDC to the unauthorized device attempting to obtain the
SDC, for example an infrared reader on a counterfeit key. When the
handshake communication protocol succeeds, programming station 60
permits the SDC randomly generated by the logic control circuit
and/or stored in the memory of the station to be transmitted by the
optical transceiver to the cooperating optical transceiver disposed
within the key 20. As will be readily apparent to those skilled in
the art, the SDC may be transmitted from the programming station 60
to the merchandise security key 20 alternatively by any other
suitable means, including without limitation, electrical contacts
or electromechanical, electromagnetic or magnetic conductors, as
desired.
[0043] It is understood that in other embodiments, the programmable
electronic key 20 may be programmed without use of a programming
station 60. For example, the key 20 may be self-programming or
could be pre-programmed with a particular security code.
[0044] As illustrated in FIG. 2, the merchandise security key 20
programmed with the SDC is then positioned to operatively engage
the merchandise security device 40. In the embodiments shown and
described herein, the merchandise security device is a conventional
cabinet lock that has been modified to be unlocked by the
programmable electronic key 20. Preferably, the merchandise
security device 40 is a "passive" device. As used herein, the term
passive is intended to mean that the security device 40 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 40 is passive since
the expense of an internal power source is confined to the
merchandise security key 20, and one such key is able to operate
multiple security devices. If desired, the merchandise security
device 40 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 40 to the merchandise
security key 20 to authenticate the security device and thereby
authorize the key to provide power to the security device.
[0045] The merchandise security device 40 further comprises a logic
control circuit, similar to the logic control circuit disposed
within the key 20, 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 60 and the
key. In essence, the logic control circuit of the key 20 and the
logic control circuit of the merchandise security device 40
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 proper (i.e. 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 20 will not program the device 40 with the SDC, and
consequently, the merchandise security device will not operate. If
the merchandise security device 40 was previously programmed with a
different SDC, the device will no longer communicate with the
merchandise security key 20. In the event the handshake
communication protocol is successful, the merchandise security key
20 permits the SDC stored in the key to be transmitted by the
optical transceiver disposed within the key to a cooperating
optical transceiver disposed within the merchandise security device
40 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
merchandise security key 20 to the merchandise security device 40
alternatively by any other suitable means, including without
limitation, via one or more electrical contacts, or via
electromechanical, electromagnetic or magnetic conductors, as
desired. Furthermore, the SDC may be transmitted by inductive
transfer of data from the programmable electronic key 20 to the
programmable merchandise security device 40.
[0046] On the other hand, when the handshake communication protocol
is successful and the merchandise security device 40 is an
authorized device having the same (i.e. matching) SDC, the logic
control circuit of the key 20 causes the internal power source of
the key to transfer electrical power to the device to operate the
mechanical lock mechanism. In the exemplary embodiment of FIGS.
1A-9B, electrical contacts disposed on the merchandise security key
20 electrically couple with cooperating electrical contacts on the
merchandise security device 40 to transfer power from the internal
battery of the key to the merchandise security device. Power may be
transferred directly to the mechanical lock mechanism, or
alternatively, may be transferred to a power circuit disposed
within the merchandise security device 40 that operates the
mechanical lock mechanism of the security device. In the embodiment
of FIGS. 1A-9B, the merchandise security device (cabinet lock) 40
is affixed to one of the pair of adjacent and overlapping sliding
doors 102 of a conventional merchandise display cabinet 100 of the
type suitable for use, for example, in a retail store. The cabinet
100 may contain expensive items of merchandise 110, such as
cellular (mobile) telephones, digital cameras, Global Positioning
Satellite (GPS) devices, and the like. The doors 102 overlap
medially between the ends of the cabinet 100 and the cabinet lock
40 is secured on an elongate locking arm 104 of a lock bracket 105
affixed to the inner door. In the illustrated example, the key 20
transfers power to an electric motor, such as a DC stepper motor,
solenoid, or the like, that unlocks the lock mechanism of the
cabinet lock 40 so that the cabinet lock can be removed from the
arm 104 of the bracket 105 and the doors moved (i.e. slid) relative
to one another to access the items of merchandise 110 stored within
the cabinet 100. As shown, the arm 104 of the bracket 105 is
provided with one-way ratchet teeth 106 and the cabinet lock 40 is
provided with complimentary ratchet pawls (not shown) in a
conventional manner so that the key 20 is not required to lock the
cabinet lock 40 onto the inner door 102 of the cabinet 100. If
desired, however, the cabinet lock 40 can be configured to require
use of the key 20 to both unlock and lock the cabinet lock.
[0047] It will be readily apparent to those skilled in the art that
the cabinet lock illustrated herein is but one of numerous types of
passive merchandise security devices 40 that can be configured to
be operated by a programmable electronic key 20 according to the
present invention. By way of example and without limitation,
merchandise security device 40 may be a locking base for securing a
merchandise display hook to a display support, such as pegboard,
slatwall, bar stock or wire grid, or may be a locking end assembly
for preventing the rapid removal of merchandise from the
merchandise display hook. Alternatively, the merchandise security
device 40 may be a merchandise security display stand comprising a
mechanical lock mechanism for securing the display stand to a
display support, such as a table, counter, desk, wall, or other
support. Alternatively, the merchandise security device 40 may be
incorporated into packaging for one or more items of merchandise
comprising a mechanical lock mechanism for separating the packaging
from the merchandise or for removing the merchandise from the
packaging. Still further, the merchandise security device 40 may be
a conventional door or window lock for preventing access to a room,
booth, box or other enclosure. In any of the aforementioned
embodiments, the merchandise security device 40 may further
comprise an electronic lock mechanism, such as a conventional
proximity, limit or contact switch, including an associated
monitoring circuit that activates an alarm in response to the
switch being actuated or the integrity of a sense loop monitored by
the monitoring circuit being compromised. In such embodiments the
merchandise security device 40 comprises a logic control circuit,
or the equivalent, including a memory for storing a SDC, and a
communication system for initially receiving the SDC from the
merchandise security key 20 and subsequently communicating with the
key to authenticate the SDC of the key.
[0048] As illustrated in FIG. 3A and shown enlarged in FIG. 3B, the
merchandise security system may also include a charging station 80
for initially charging and subsequently recharging a rechargeable
battery disposed within the merchandise security key 20. The
charging station 80 comprises at least one, and preferably, a
plurality of charging ports 82 each sized and shaped to receive a
key 20 to be charged or recharged. As will be described in greater
detail with reference to FIGS. 9A and 9B, each charging port 82
comprises at least one, and preferably, a plurality of magnets 85
for securely positioning and retaining the key 20 within the
charging port 82 in electrical contact with the charging station
80. If desired, the charging station 80 may comprise an internal
power source, for example, an extended-life replaceable battery or
a rechargeable battery, for providing power to up to four keys 20
positioned within respective charging ports 82. Alternatively, and
as shown herein, charging station 80 may be operatively connected
to an external power source by a power cord 90 having at least one
conductor.
[0049] An available feature of a merchandise security system and
method according to the invention is that the logic control circuit
of the programmable electronic key 20 may include a time-out
function. More particularly, the ability of the key 20 to transfer
data and power to the merchandise security device 40 is deactivated
after a predetermined time period. By way of example, the logic
control circuit may be deactivated after about six to twelve hours
(e.g., about eight hours) from the time the key was programmed or
last refreshed by the programming station 60. In this manner, an
authorized sales associate typically must program or refresh the
key 20 assigned to him at the beginning of each work shift.
Furthermore, the charging station 80 may be configured to
deactivate the logic control circuit of the key 20 (and thereby
prevent use of the SDC) when the key is positioned within a
charging port 82. In this manner, the charging station 80 can be
made available to an authorized sales associate in an unsecured
location without risk that a charged key 20 could be removed from
the charging station and used to maliciously disarm and/or unlock a
merchandise security device 40. The merchandise security key 20
would then have to be programmed or refreshed with the SDC by the
programming station 60, which is typically monitored or maintained
at a secure location, in order to reactivate the logic control
circuit of the key. If desired, the charging station 80 may
alternatively require a matching handshake communication protocol
with the programmable electronic key 20 in the same manner as the
merchandise security device 40 and the key.
[0050] FIG. 4 is an enlarged view showing the exemplary embodiment
of the merchandise security device 40 in greater detail. As
previously mentioned, a merchandise security device 40 according to
the present invention may be any type of security device including,
but not limited to, a security display (e.g. alarming stand),
security fixture (e.g. locking hook, shelf, cabinet, etc.),
security packaging (e.g. merchandise keeper for items of
merchandise) or a conventional door/window/drawer lock; etc., that
utilizes electrical power to lock and/or unlock a mechanical lock
mechanism, and optionally, further includes an electronic lock
mechanism, such as an alarm or a security "handshake." At the same
time, the merchandise security device 40 does not have an internal
power source sufficient to operate the mechanical lock mechanism.
As a result, the merchandise security device 40 is configured to
receive at least power, and in one embodiment, both power and data
from an external source, such as the merchandise security key 20
shown and described herein. The exemplary embodiment of the
merchandise security device depicted in FIG. 4 is a cabinet lock 40
configured to be securely affixed to the locking arm 104 of a
conventional cabinet lock bracket 105, as previously described. The
cabinet lock 40 comprises a logic control circuit for performing a
security handshake communication protocol with the logic control
circuit of the merchandise security key 20 and for being programmed
with the SDC by the key. In other embodiments, the cabinet lock 40
may be configured to transmit the SDC to the merchandise security
key 20 to authenticate the security device and thereby authorize
the key to transfer power to the cabinet lock. As previously
mentioned, the data (e.g. handshake communication protocol and SDC)
may be transferred (i.e. transmitted and received) by electrical
contacts, optical transmission, acoustic transmission or magnetic
induction, for example.
[0051] The cabinet lock 40 comprises a housing 41 sized and shaped
to contain a logic control circuit (not shown) and an internal
mechanical lock mechanism (not shown). A transfer port 42 formed in
the housing 41 is sized and shaped to receive a transfer probe of
the merchandise security key 20, as will be described. At least
one, and sometimes, a plurality of magnets 45 may be disposed
within the transfer port 42 for securely positioning and retaining
the transfer probe of the key 20 in electrical contact with
electrical contacts of the mechanical lock mechanism, and if
desired, in electrical contact with the logic control circuit of
the cabinet lock 40. In the exemplary embodiment shown and
described in FIGS. 1A-9B, data is transferred from the merchandise
security key 20 to the cabinet lock 40 by wireless communication,
such as by infrared (IR) optical transmission, as shown and
described in the commonly owned U.S. Pat. No. 7,737,843 entitled
PROGRAMMABLE ALARM MODULE AND SYSTEM FOR PROTECTING MERCHANDISE,
the disclosure of which is incorporated herein by reference in its
entirety. Power is transferred from the merchandise security key 20
to the cabinet lock 40 through electrical contacts disposed on the
transfer probe of the key and corresponding electrical contacts
disposed within the transfer port 42 of the cabinet lock. For
example, the transfer port 42 may comprise a metallic outer ring 46
that forms one electrical contact, while at least one of the
magnets 45 form another electrical contact to complete an
electrical circuit with the electrical contacts disposed on the
transfer probe of the key 20. Regardless, electrical contacts
transfer power from the key 20 to the mechanical lock mechanism
disposed within the housing 41. As previously mentioned, the power
transferred from the key 20 is used to operate the mechanical lock
mechanism, for example utilizing an electric motor, DC stepper
motor, solenoid, or the like, to unlock the mechanism so that the
cabinet lock 40 can be removed from the locking arm 104 of the lock
bracket 105.
[0052] FIGS. 5-8 show an exemplary embodiment of a merchandise
security key, also referred to herein as a programmable electronic
key, 20 according to the present invention. As previously
mentioned, the merchandise security key 20 is configured to
transfer both data and power to a merchandise security device 40
that comprises an electronic lock mechanism and a mechanical lock
mechanism, as previously described. Accordingly, the programmable
electronic key 20 may be an "active" device in the sense that it
has an internal power source sufficient to operate the mechanical
lock mechanism of the merchandise security device 40. As a result,
the programmable electronic key 20 may be configured to transfer
both data and power from an internal source disposed within the
key, for example a logic control circuit (i.e. data) and a battery
(i.e. power). The exemplary embodiment of the programmable
electronic key 20 depicted in FIGS. 5-8 is a merchandise security
key configured to be received within the transfer port 42 of the
cabinet lock 40 shown in FIG. 4, as well as within the programming
port 62 of the programming station 60 (FIG. 2; FIG. 3A) and the
charging port 82 of the charging station 80 (FIG. 3B; FIG. 9A;
FIG.9B). The programmable electronic key 20 comprises a logic
control circuit for performing a handshake communication protocol
with the logic control circuit of the programming station 60 and
for receiving the SDC from the programming station, as previously
described. The logic control circuit of the programmable electronic
key 20 further performs a handshake communication protocol with the
logic control circuit of the merchandise security device 40 and
transfers the SDC to the device or permits operation of the device,
as previously described. As previously mentioned, the data (e.g.
handshake communication protocol and SDC) may be transferred (e.g.
transmitted and received) by direct electrical contacts, optical
transmission, acoustic transmission or magnetic induction.
[0053] As illustrated in FIG. 6, the programmable electronic key 20
comprises a housing 21 and an outer sleeve 23 that is removably
disposed on the housing. The housing 21 contains the internal
components of the key 20, including without limitation, the logic
control circuit, memory, communication system and battery, as will
be described. A window 24 may be formed through the outer sleeve 23
for viewing indicia 24A that uniquely identifies the key 20, or
alternatively, indicates a particular item of merchandise, a
specific merchandise security device, or a display area within a
retail store for use with the key. The outer sleeve 23 is removably
disposed on the housing 21 so that the indicia 24A may be altered
or removed and replaced with different indicia. The programmable
electronic key 20 may further comprise a detachable "quick-release"
type key chain ring 30. An opening 26 (FIG. 8) is formed through
the outer sleeve 23 and a key chain ring port 28 is formed in the
housing 21 for receiving the key chain ring 30. The programmable
electronic key 20 further comprises a transfer probe 25 located at
an end of the housing 21 opposite the key chain ring port 28 for
transferring data and power to the merchandise security device 40,
as previously described. The transfer probe 25 also transmits and
receives the handshake communication protocol and the SDC from the
programming station 60, as previously described, and receives power
from the charging station 80, as will be described in greater
detail with reference to FIG. 9A and FIG. 9B.
[0054] As best shown in FIG. 8, an internal battery 31 and a logic
control circuit or printed circuit board (PCB) 32 are disposed
within the housing 21 of the programmable electronic key 20.
Battery 31 may be a conventional extended-life replaceable battery
or a rechargeable battery suitable for use with the charging
station 80. The logic control circuit 32 is operatively coupled and
electrically connected to a switch 33 that is actuated by the
control button 22 provided on the exterior of the key 20 through
the outer sleeve 23. Control button 22 in conjunction with switch
33 controls certain operations of the logic control circuit 32, and
in particular, transmission of the data (i.e. handshake
communication protocol and SDC) to the merchandise security device
40. In that regard, the logic control circuit 32 is further
operatively coupled and electrically connected to a communication
system 34 for transmitting and receiving the handshake
communication protocol and SDC data. In the exemplary embodiment
shown and described herein, the communication system 34 is a
wireless infrared (IR) transceiver for optical transmission of data
between the programmable electronic key 20 and the programming
station 60, as well as between the key 20 and the merchandise
security device 40. As a result, the transfer probe 25 of the key
20 is provided with an optically transparent or translucent filter
window 35 for emitting and collecting optical transmissions between
the key 20 and the programming station 60, or alternatively,
between the key 20 and the merchandise security device 40, as
required. Transfer probe 25 further comprises at least one
bi-directional power transfer electrical contacts 36, 38 made of an
electrically conductive material for transferring power to the
merchandise security device 40 and for receiving power from the
charging station 80, as required. Accordingly, electrical contacts
36, 38 are electrically connected to battery 31, and are
operatively coupled and electrically connected to logic control
circuit 32 in any suitable manner, for example by conductive
insulated wires or plated conductors.
[0055] According to one aspect of a programmable electronic key 20
according to the present invention, especially when used for use in
conjunction with a merchandise security device 40 as described
herein, 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 on the mechanical lock mechanism. As a result,
the key cannot be unintentionally broken off in the lock, as often
occurs with conventional mechanical key and lock mechanisms.
Furthermore, neither the key nor and the mechanical lock mechanism
suffer from excessive wear as likewise often occurs with
conventional mechanical key and lock mechanisms. In addition, there
is no required orientation of the transfer probe 25 of the
programmable electronic key 20 relative to the charging port 82 of
the charging station 80 or the transfer port 42 of the merchandise
security device 40. Accordingly, any wear of the electrical
contacts on the transfer probe 25, the charging port 82 or the
transfer port 42 is minimized. As a further advantage, an
authorized person is not required to position the transfer probe 25
of the programmable electronic key 20 in a particular orientation
relative to the transfer port 42 of the merchandise security device
40 and thereafter exert a compressive and/or torsional force on the
key to operate the mechanical lock mechanism of the device.
[0056] FIG. 9A and FIG. 9B show charging station 80 in greater
detail. As previously mentioned, the charging station 80 recharges
the internal battery 31 of the programmable electronic key 20, and
if desired, deactivates the data transfer and/or power transfer
capability of the key until the key is reprogrammed with the SDC by
the programming station 60. Regardless, the charging station 80
comprises a housing 81 for containing the internal components of
the charging station. The exterior of the housing 81 has at least
one, and preferably, a plurality of charging ports 82 formed
therein that are sized and shaped to receive the transfer probe 25
of the merchandise security key 20, as previously described. At
least one, and in some embodiment a plurality, of magnets 85 are
disposed within each charging port 82 for securely positioning and
retaining the transfer probe 25 in electrical contact with the
charging station 80. More particularly, the electrical contacts 36,
38 of the key 20 are retained within the charging port 82 in
electrical contact with the magnets 85 and a resilient "pogo" pin
86 made of a conductive material to complete an electrical circuit
between the charging station 80 and the battery 31 of the key.
[0057] As best shown in FIG.9B, housing 81 is sized and shaped to
contain a logic control circuit, or printed circuit board (PCB) 92
that is operatively coupled and electrically connected to the
magnets 85 and the pogo pin 86 of each charging port 82. The pogo
pin 86 is depressible to complete an electrical circuit as the
magnets 85 position and retain the electrical contacts 36, 38
within the charging port 82. In particular, magnets 85 make
electrical contact with the outer ring electrical contact 36 of the
transfer probe 25 of key 20, while pogo pin 86 makes electrical
contact with inner ring electrical contact 38 of the transfer
probe. When the pogo pin 86 is depressed and the electrical circuit
between the charging station 80 and the key 20 is completed, the
charging station recharges the internal battery 31 of the key. As
previously mentioned, charging station 80 may comprise an internal
power source, for example, an extended-life replaceable battery or
a rechargeable battery, for providing power to the key(s) 20
positioned within the charging port(s) 82. Alternatively, and as
shown herein, the logic control circuit 92 of the charging station
80 is electrically connected to an external power source by a power
cord 90 having at least one conductor. Furthermore, logic control
circuit 92 may be operable for deactivating the data transfer and
power transfer functions of the programmable electronic key 20, or
alternatively, for activating the "time-out" feature of the key
until it is reprogrammed or refreshed by the programming station
60.
[0058] FIGS. 10-17B show another exemplary embodiment of a
merchandise display security system and method including a
programmable key, a merchandise security device, a programming
station and a charging station according to the present invention.
In this embodiment, the system and method comprise at least a
programmable electronic key (also referred to herein as a
merchandise security key) with inductive transfer, indicated
generally at 120, and a merchandise security device with inductive
transfer, indicated generally at 140, that is operated by the key
120. However, the programmable electronic key 120 is useable with
any security device or locking device with inductive transfer
capability that requires power transferred from the key to the
device by induction, or alternatively, requires data transferred
between the key and the device and power transferred from the key
to the device by induction. Further examples 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.
[0059] The system and method may further comprise an optional
programming station 60, as previously described, operable for
programming the key 120 with a Security Disarm Code (SDC). In
addition to programming station 60, the system and method may
further comprise an optional charging station with inductive
transfer, indicated generally at 180, operable for initially
charging and subsequently recharging an internal power source
disposed within the key 120.
[0060] As previously described with respect to programmable
electronic key 20, the programmable electronic key 120 is
configured to be programmed with a unique SDC by the programming
station 60. Data communication between the programming station 60
and the key 120 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 60 and key 120 is
possible, including without limitation, optical transmission,
acoustic transmission, radio frequency (RF) transmission or
inductive transmission, such as magnetic induction. In the
embodiments shown and described herein, communication between
programming station 60 and key 120 is accomplished by wireless
optical transmission, and more particularly, by infrared (IR)
transceivers provided in the programming station and the key.
[0061] As illustrated in FIG. 11, the merchandise security system
and method further comprises charging station 180 for initially
charging and subsequently recharging a rechargeable battery
disposed within the merchandise security key 120 via inductive
transfer. The charging station 180 comprises at least one, and
preferably, a plurality of charging ports 182 each sized and shaped
to receive a merchandise security key 120. If desired, each
charging port 182 may comprise mechanical or magnetic means for
properly positioning and securely retaining the key 120 within the
charging port. By way of example and without limitation, at least
one, and sometimes a plurality of magnets (not shown), may be
provided for positioning and retaining the key 120 within the
charging port 182 of the charging station 180. However, as will be
described further with reference to FIG. 17B, it is only necessary
that the inductive transceiver of the merchandise security key 120
is sufficiently aligned with the corresponding inductive
transceiver of the charging station 180 over a generally planar
surface within the charging port 182. Thus, magnets are not
required (as with charging station 80) to position, retain and
maintain electrical contacts provided on the merchandise security
key 120 in electrical contact with corresponding electrical
contacts provided on the charging station 180. If desired, the
charging station 180 may comprise an internal power source, for
example, an extended-life replaceable battery or a rechargeable
battery, for providing power to the key(s) 120 positioned within
the charging port(s) 182. Alternatively, and as shown herein,
charging station 180 may be operatively connected to an external
power source by a power cord 190 having at least one conductor in a
conventional manner.
[0062] FIG. 12 shows the merchandise security device 140 (e.g.,
cabinet lock) with inductive transfer in greater detail. The
embodiment of the merchandise security device depicted in FIG. 12
is a cabinet lock configured to be securely affixed to the locking
arm 104 of a conventional cabinet lock bracket 105. As previously
described, the cabinet lock 140 comprises a logic control circuit
for performing a handshake communication protocol with the logic
control circuit of the merchandise security key 120 and for
receiving the SDC from the key. In other embodiments, the cabinet
lock 140 may be configured to transmit the SDC to the merchandise
security key 120 to authenticate the security device and thereby
authorize the key to transfer power to the security device. As
previously mentioned, the data (e.g. handshake communication
protocol and SDC) may be transmitted and received (e.g.
transferred) by electrical contacts, optical transmission, acoustic
transmission, radio frequency (RF) transmission or magnetic
induction. In a particular embodiment, a merchandise security
device 140 with inductive transfer according to the invention may
both receive electrical power from the merchandise security key 120
and communicate (i.e. transmit/receive) the SDC with the key by
magnetic induction.
[0063] The cabinet lock 140 comprises a housing 141 sized and
shaped to contain a logic control circuit (not shown) and an
internal mechanical lock mechanism (not shown). A transfer port 142
formed in the housing 141 is sized and shaped to receive a transfer
probe of the merchandise security key 120, as will be described. If
desired, the transfer port 142 may comprise mechanical or magnetic
means for properly positioning and securely retaining the key 120
within the transfer port. By way of example and without limitation,
at least one, and sometimes a plurality of, magnets (not shown) may
be provided for positioning and retaining the key 120 within the
transfer port 142 of the cabinet lock 140. However, as previously
described with respect to the merchandise security key 120 and the
charging port 182 of the charging station 180, it is only necessary
that the inductive transceiver of the merchandise security key 120
is sufficiently aligned with the corresponding inductive
transceiver of the cabinet lock 140 over a generally planar surface
within the transfer port 42. Therefore, magnets are not required to
position, retain and/or maintain electrical contacts provided on
the merchandise security key 120 in electrical contact with
corresponding electrical contacts provided on the cabinet lock 140.
In the particular embodiment shown and described herein, data
and/or power is transferred from the merchandise security key 120
to the cabinet lock 140 by wireless communication, such as infrared
(IR) optical transmission as discussed above. Power is transferred
from the merchandise security key 120 to the cabinet lock 140 by
induction across the transfer port 142 of the cabinet lock using an
inductive transceiver disposed within a transfer probe of the key
that is aligned with a corresponding inductive transceiver disposed
within the cabinet lock. For example, the transfer probe of the
merchandise security key 120 may comprise an inductive transceiver
coil that is electrically connected to the logic control circuit of
the key to provide electrical power from the internal battery of
the key to an inductive transceiver coil disposed within the
cabinet lock 140. The inductive transceiver coil of the cabinet
lock 140 then transfers the electrical power from the internal
battery of the key 120 to the mechanical lock mechanism disposed
within the housing 141 of the cabinet lock. As previously
mentioned, the power transferred from the key 120 is used to unlock
the mechanical lock mechanism, for example utilizing an electric
motor, DC stepper motor, solenoid, or the like, so that the cabinet
lock 140 can be removed from the arm 104 of the lock bracket
105.
[0064] FIGS. 13-16 show the programmable electronic key 120 with
inductive transfer in greater detail. As previously mentioned, the
key 120 is configured to transfer both data and power to a
merchandise security device 140 that comprises an electronic lock
mechanism and a mechanical lock mechanism. Accordingly, the
programmable electronic key 120 may be an active device in the
sense that it has an internal power source sufficient to operate
the mechanical lock mechanism of the merchandise security device
140. As a result, the programmable electronic key 120 may be
configured to transfer both data and power from an internal source,
such as a logic control circuit (i.e. data) and a battery (i.e.
power) disposed within the key. The embodiment of the programmable
electronic key 120 depicted herein is a merchandise security key
with inductive transfer capability configured to be received within
the transfer port 145 of the cabinet lock 140 shown in FIG. 12, as
well as the programming port 62 of the programming station 60 (FIG.
2) and the charging port 182 of the charging station 180 (FIG. 11).
The programmable electronic key 120 comprises a logic control
circuit for performing a handshake communication protocol with the
logic control circuit of the programming station 60 and for
receiving the SDC from the programming station, as previously
described. The logic control circuit of the programmable electronic
key 120 further performs a handshake communication protocol with
the logic control circuit of the merchandise security device 140
and transfers the SDC to the merchandise security device, as
previously described. As previously mentioned, the data (e.g.
handshake communication protocol and SDC) may be transferred (i.e.
transmitted and received) by electrical contacts, optical
transmission, acoustic transmission, radio frequency (RF) or
magnetic induction. In a particular embodiment, a merchandise
security key 120 with inductive transfer according to the invention
may both transfer electrical power to a merchandise security device
140 and communicate (e.g. transmit/receive) the SDC with the
security device by magnetic induction.
[0065] The programmable electronic key 120 comprises a housing 121
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. Although various sizes and shapes may be employed,
the housing 121 is illustrated as having a lower portion 123 and an
upper portion 124 that are joined together after assembly, for
example, by ultrasonic welding. The programmable electronic key 120
further defines an opening 128 at one end for coupling the key to a
key chain ring, lanyard or the like. As previously mentioned, the
programmable electronic key 120 further comprises a transfer probe
125 located at an end of the housing 121 opposite the opening 128
for transferring data and power to the merchandise security device
140. The transfer probe 125 is also operable to transmit and
receive the handshake communication protocol and the SDC from the
programming station 60, as previously described, and to receive
power from the charging station 180, as will be described in
greater detail with reference to FIG. 17A and FIG. 17B.
[0066] FIG. 14 shows an exemplary embodiment of an inductive coil
126 having high magnetic permeability that is adapted (i.e. sized
and shaped) to be disposed within the housing 121 of the electronic
key 120 adjacent the transfer probe 125. As shown herein, the
inductive coil 126 comprises a highly magnetically permeable
ferrite core 127 surrounded by a plurality of inductive core
windings 129. The inductive core windings 129 consist of a length
of a conductive wire that is wrapped around the ferrite core.
Passing an alternating current through the conductive wire
generates, or induces, a magnetic field around the inductive core
127. The alternating current in the inductive core windings 129 may
be produced by connecting the leads 129A and 129B of the conductive
wire to the internal battery of the electronic key 120 through the
logic control circuit. FIG. 14 further shows an inductive coil 146
having high magnetic permeability that is adapted (i.e. sized and
shaped) to be disposed within the housing 141 of the merchandise
security device (i.e. cabinet lock) 140 adjacent the transfer port
142. As shown herein, the inductive coil 146 comprises a highly
magnetically permeable ferrite core 147 surrounded by a plurality
of inductive core windings 149 consisting of a length of a
conductive wire that is wrapped around the ferrite core. Placing
the transfer probe 125 of the electronic key 120 into the transfer
port 142 of the cabinet lock 140 and passing an alternating current
through the inductive core windings 129 of the inductive core 126
generates a magnetic field within the transfer port of the cabinet
lock in the vicinity of the inductive coil 146. As a result, an
alternating current is generated, or induced, in the conductive
wire of the inductive core windings 149 of inductive coil 146
having leads 149A and 149B connected to the logic control circuit
of the cabinet lock 140. The alternating current induced in the
inductive coil 146 of the cabinet lock 140 is then transformed into
a direct current, such as via a bridge rectifier on the logic
control circuit, to provide direct current (DC) power to the
cabinet lock. The DC power generated in the cabinet lock 140 by the
inductive coil 126 of the electronic key 120, may be used, for
example, to unlock a mechanical lock mechanism disposed within the
housing 141 of the cabinet lock.
[0067] As best shown in FIG. 16, an internal battery 131 and a
logic control circuit, or printed circuit board (PCB) 132 are
disposed within the housing 121 of the programmable electronic key
120. Battery 131 may be a conventional extended-life replaceable
battery, or a rechargeable battery suitable for use with the
charging station 180. The logic control circuit 132 is operatively
coupled and electrically connected to a switch 133 that is actuated
by the control button 122 provided on the exterior of the key 120
through the housing 121. Control button 122 in conjunction with
switch 133 controls certain operations of the logic control circuit
132, and in particular, transmission of the data (i.e. handshake
communication protocol and SDC) between the key and the programming
station 60, as well as between the key and the merchandise security
device 140. In that regard, the logic control circuit 132 is
further operatively coupled and electrically connected to a
communication system 134 for transferring the handshake
communication protocol and SDC data. As shown and described herein,
the communication system 134 is a wireless infrared (IR)
transceiver for optical transmission of data between the
programmable electronic key 120 and the programming station 60, and
between the key and the merchandise security device 140. As a
result, the transfer probe 125 of the key 120 is provided with an
optically transparent or translucent filter window 135 for emitting
and collecting optical transmissions between the key 120 and the
programming station 60, or between the key and the merchandise
security device 140, as required. Transfer probe 125 further
comprises inductive coil 126 (FIG. 14) comprising inductive core
127 and inductive core windings 129 for transferring electrical
power to the merchandise security device 140 and/or receiving
electrical power from the charging station 180 to charge the
internal battery 131, as required. Accordingly, the leads 129A and
129B (FIG. 14) of the inductive coil 126 are electrically connected
to the logic control circuit 132, which in turn is electrically
connected to the battery 131, in a suitable manner, for example by
conductive insulated wires or plated conductors. Alternatively, the
optical transceiver 134 may be eliminated and data transferred
between the programmable electronic key 120 and the merchandise
security device 140 via magnetic induction through the inductive
coil 126.
[0068] FIG. 17A and FIG. 17B show charging station 180 with
inductive transfer capability in greater detail. As previously
mentioned, the charging station 180 recharges the internal battery
131 of the merchandise security key 120. In certain instances, the
charging station 180 also deactivates the data transfer and/or
power transfer capability of the key 120 until the key has been
reprogrammed with the SDC by the programming station 60.
Regardless, the charging station 180 comprises a housing 181 for
containing the internal components of the charging station. The
exterior of the housing 181 has at least one charging port 182
formed therein that is sized and shaped to receive the transfer
probe 125 of a programmable electronic key 120. As previously
described, mechanical or magnetic means may be provided for
properly positioning and securely retaining the transfer probe 125
within the charging port 182 such that the inductive coil 126 is in
alignment with a corresponding inductive coil 186 (FIG. 17B)
disposed within the housing 181 of the charging station 180
adjacent the charging port. As will be readily understood and
appreciated, the inductive coil 186 adjacent the charging port 182
of the charging station 180 generates, or induces, an alternating
current in the conductive wire of the inductive core windings 129
of inductive coil 126 that in turn provides DC power (for example,
via a bridge rectifier on the logic control circuit 132) to charge
the battery 131 of the programmable electronic key 120.
[0069] As best shown in FIG.17B, housing 181 is sized and shaped to
contain a logic control circuit or printed circuit board (PCB) 192
that is electrically connected and operatively coupled to an
inductive coil 186 adjacent each of the charging ports 182. In the
manner previously described with respect to inductive coli 126 and
inductive coil 146, each inductive coil 186 comprises an inductive
core 187 surrounded by a plurality of inductive core windings 189
formed by a conductive wire having a pair of leads (not shown).
When an alternating current is passed through the conductive wire
of the inductive core windings 189 with the transfer probe 125 of
the programmable electronic key 120 disposed in the charging port
182 of the charging station 180, the inductive coil 186 generates a
magnetic field that induces an alternating current in the
conductive wire of the inductive core windings 129 of the inductive
coil 126 of the key. The alternating current in the inductive coil
126 is then transformed into DC power to charge the internal
battery 131 of the programmable electronic key 120. As previously
mentioned, charging station 180 may comprise an internal power
source, for example, an extended-life replaceable battery or a
rechargeable battery, for providing power to the key(s) 120
positioned within the charging port(s) 182. Alternatively, and as
shown herein, the logic control circuit 192 of the charging station
180 is electrically connected to an external power source by a
power cord 190 having at least one conductor. Furthermore, logic
control circuit 192 may be operable for deactivating the data
transfer and/or power transfer functions of the programmable
electronic key 120, or alternatively, for activating the "timing
out" feature of the key until it is reprogrammed or refreshed by
the programming station 60.
[0070] According to one embodiment, electronic key 20, 120 includes
at least one audio indicator for indicating the status of a lock
that is operated by the key. In this regard, lock or locking device
may be associated with a merchandise security device, such as
cabinet locks 40, 140, including a locking mechanism discussed
above.
[0071] In one embodiment, FIG. 18 shows an electronic key 200
comprising a logic control circuit or electronic circuitry 210
(e.g. a controller disposed on a PCB) and an audio component 220
(e.g. a piezo or piezoelectric alarm) that produces and emits an
audio signal when the key successfully unlocks or locks the cabinet
lock. As discussed above, the electronic key may be configured to
transmit a communications protocol signal, also known as a
"handshake" (e.g. a security code), to the cabinet lock and receive
a corresponding signal back from the cabinet lock authorizing the
electronic key to transfer power to the lock mechanism of the lock
to change the status of the lock from a locked state to an unlocked
state, or alternatively, from an unlocked state to a locked state.
When the lock mechanism operates to change the state of the lock
from a locked state to an unlocked state, the lock transmits a
signal to the electronic key indicating that a successful change of
state (e.g. from locked to unlocked) has occurred.
[0072] In an embodiment illustrated in FIGS. 19 and 20, state
diagrams of a "Desired Unlock" experience and a "Desired Relock"
experience are shown, respectively. In this embodiment, the
electronic circuitry 210 of the key 200 activates the audio
component to emit an initial audio indication, for example, a
single "Beep" to indicate to a user that the state of the lock has
successfully changed from locked to unlocked. Thereafter, the audio
component 220 is activated to emit a first audio indication, for
example a "BeepBeep", to indicate to a user that the lock in is an
unlocked (unsecured) state. The first audio indication may be
emitted continuously or intermittently until the key 200 again
transfers power to the lock and the lock successfully operates to
change the state of the lock from the unlocked (unsecured) state
back to the locked (secured) state. Alternatively, the first audio
indication may be emitted continuously or intermittently for only a
predetermined period of time (e.g., about 120 seconds) unless the
state of the lock is changed from the unlocked (unsecured) state
back to the locked (secured) state within the predetermined time
period.
[0073] In another embodiment illustrated in FIGS. 21 and 22, an
"Impatient (undesired) Unlock" experience and an "Impatient
(undesired) Relock" experience are shown, respectively. In this
embodiment, the electronic key 200 includes electronic circuitry
210 and an audio component 220 (e.g. a piezo or piezoelectric
alarm) that produces and emits an audio signal when the key does
not successfully change the status of a lock or locking device
powered by the key. As previously described, the key 200 transmits
a communications protocol signal and receives a corresponding
signal back from the lock authorizing the key to transfer power to
the lock mechanism of the lock to change the state of the lock. In
the event that the lock mechanism does not successfully change the
state of the lock, for example, the user removes the key 200 from
the lock before the operation of the lock mechanism is completed,
the electronic circuitry of the key does not activate the audio
component to emit an initial audio indication (e.g. a "Beep") to
indicate to a user that the state of the lock mechanism may not
have successfully changed from the locked (secured) state to the
unlocked (unsecured) state. Thereafter, the audio component 220 is
activated to emit a second audio indication (e.g., "BuzzBuzz") that
is different than the first audio indication to indicate to the
user that the lock mechanism may not have successfully operated to
change the state of the lock. Accordingly, the user is prompted to
correct a potential problem by attempting to use the key 200 once
again properly to change the state of the lock. It should be noted
that the second audio indication may be emitted when the operation
of the lock mechanism is not successfully completed or when the
user does not maintain the key 200 in contact with the lock (or in
sufficient proximity) for a sufficiently long period of time for
the lock to complete the communications protocol with the key,
regardless of whether the initial status of the lock is locked
(secured) or unlocked (unsecured).
[0074] In a method according to one embodiment of the invention, a
user aligns the transfer port of the electronic key 200 with the
transfer port of a cabinet lock and activates the key to initiate
the communications protocol. In the event that the lock transmits
an "authorized" communications protocol signal to the key 200, the
key then transfers power to the lock mechanism of the lock to
change the state of the lock. In a particular embodiment, the key
200 transmits a security code signal to the cabinet lock and the
key receives a confirmation security code signal back from the
cabinet lock to authorize the key to transfer power to the lock
mechanism of the cabinet lock, for example, utilizing an inductive
power transfer technology. In the event that the lock mechanism
successfully changes the state of the cabinet lock from a locked
(secured) state to an unlocked (unsecured) state, the electronic
circuitry 210 of the key 200 then activates the audio component 210
to emit an initial audio indication to indicate to the user that
the cabinet lock is in an unlocked (unsecured) state (e.g. "Beep")
followed by a first audio indication (e.g. BeepBeep") that the lock
remains in the unlocked (unsecured) state. In the event that the
lock mechanism does not successfully change the state of the
cabinet lock, for example, from the locked (secured) state to the
unlocked (unsecured) state, then the electronic circuitry 210 of
the key 200 activates the audio component 220 to emit a second
audio indication (e.g., "BuzzBuzz") that is different than the
first audio indication to indicate to the user that the operation
of the lock mechanism was unsuccessful and that the status of the
cabinet lock has not changed, or alternatively, that the
communications protocol between the key and the lock was not
completed.
[0075] It should be noted that a cabinet lock key 200 with audio
indicators according to embodiments of the invention may be used
with more than one cabinet lock. In the event that the cabinet lock
key 200 is used with a plurality of cabinet locks, each successful
change of a lock from a locked (secured) state to an unlocked
(unsecured) state activates the audio component 220 of the key to
emit the first audio indication for a predetermined period of time,
for example, about 2 minutes. The memory of the electronic
circuitry 210 of the key 200 may store each predetermined period of
time in a time bank and increments the time bank an additional
predetermined time period (e.g. about 2 minutes) each time the
state of another cabinet lock is changed from the locked (secured)
to the unlocked (unsecured) state, while simultaneously counting
down from the accumulated time bank. Each time the state of a
cabinet lock is changed back from the unlocked (unsecured) state to
the locked (secured) state, the memory of the electronic circuitry
210 of the key 200 will subtract one increment of the predetermined
period of time (e.g. about 2 minutes) from the time bank. In this
manner, more than one cabinet lock can be unlocked before the first
cabinet lock is relocked without the first audio indication
terminating. The electronic circuitry 210 of the key 200 will
continue to activate the audio component 220 to emit the first
audio indication as long as at least one cabinet lock remains in
the unlocked (unsecured) state and the memory of the electronic
circuitry of the key continues to contain and count down any
portion of a predetermined time period. In one embodiment, this
feature of a cabinet lock key 200 with audio indicators according
to the invention is referred to as "stacking" the time period of
the first audio indicator. It will be readily apparent to one of
ordinary skill in the art that the same feature may be provided for
the second audio indicator in the event that the state of more than
one cabinet lock is not successfully changed before the operation
of the lock mechanism of the first cabinet lock is corrected.
[0076] In another embodiment, a first audio indicator may be
emitted when a state of a first lock has been successfully changed
to unlocked, and a second audio indicator different than the first
may be emitted if the user attempts to unlock a second lock prior
to locking the first lock. Thus, the electronic key 200 may be
configured to only lock or unlock one lock at a time.
[0077] It is understood that the audio component 220 may be
configured to emit any type of audible signal. In addition, the
audio component 220 may be configured to emit one or more audible
signals to differentiate between different status changes. For
example, a successful change in state of the lock may be indicated
by a first audio indicator, while an unsuccessful change in state
may be indicated by a second, different audio indicator. Moreover,
the audio component 220 may be used in conjunction with other
components of the merchandise display security system. For example,
the audio component 220 may be configured to emit an audio
indicator when the electronic key has been fully charged in the
charging station 180, or an audio indicator may be emitted when the
electronic key has been programmed at the programming station 60.
Still further, it is understood that the programming station 60 may
be omitted in some embodiments where the electronic key 220 is
programmed directly into the electronic key or where the electronic
key is preprogrammed.
[0078] The foregoing has described one or more embodiments of a
merchandise display security system for displaying and protecting
an article of merchandise. Embodiments of a merchandise display
security system have been shown and described herein for purposes
of illustrating and enabling the best mode of the invention. Those
of ordinary skill in the art, however, will readily understand and
appreciate that numerous variations and modifications of the
invention may be made without departing from the spirit and scope
of the invention. Accordingly, all such variations and
modifications are intended to be encompassed by the appended
claims.
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