Patent Publication Number: US-7710266-B2

Title: Security system with product power capability

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
   This application claims priority from U.S. Provisional Application Ser. No. 60/880,115 filed Jan. 12, 2007 and U.S. Provisional Application Ser. No. 60/880,132 filed Jan. 12, 2007; the disclosures of which are incorporated herein by reference. 

   BACKGROUND OF THE INVENTION 
   1. Technical Field 
   The invention relates to security systems for the display of items of merchandise in a retail establishment. More particularly, the invention relates to a security system which supplies power to a product displayed in a secured condition on a sensor supported on a display module for charging the internal battery of the product or supplying electricity for controlling other features of the displayed product. The invention furthermore relates to an individual display module which contains an internal alarm dedicated to protecting a single product secured to a sensor supported on the display module. 
   2. Background Information 
   Retail stores have had a difficult time protecting items of merchandise which the potential customer wishes to visually inspect and handle prior to making the decision to purchase the items. Often such items have been keep in a glass case under lock and key which does not allow a customer to handle the item without assistance of store personnel. In addition, while such items may be secured to a display shelf or base by a cable or the like, this does not necessarily prevent the theft of the item by cutting of the cable or detaching the product from the cable. 
   Therefore, various security systems and devices have been developed which include a unique display module secured to a support surface such as a display shelf, which supports a sensor that is attached to an item of merchandise and which is mechanically and electrically connected by a lanyard or power cord to the display module. This enables a potential customer to pick up and handle the item such as a cell phone, camera, mini DVDs, MP3 players and the like, prior to purchasing the item, while the item is maintained connected to the display module. These display modules and sensors are provided with switches which will actuate an alarm contained in the display module if the item is removed from the sensor, or the module removed from its support surface, or if a connecting power cord is severed or tampered with in an unauthorized manner. These security systems utilizing such display modules and sensors have proven satisfactory for many retail security applications. 
   However, one problem has developed in the display of various items of merchandise which require a source of power, usually provided by an internal battery, such as digital cameras, music players, cell phones, mini DVD players, MP3 players etc. After the product has been displayed for a period of time, the battery will loose charge resulting in the product being inoperable requiring constant recharging of the battery by store personnel. 
   Another problem with prior art security systems is that multiple display modules are connected to a central alarm system and power supply which makes it difficult to rapidly determine which display module or attached product caused the central alarm to be actuated. Furthermore, the alarm system has to be deactivated each time one of the display modules or product displayed thereon is being replaced or modified. 
   Therefore, the need exists for a security system, and in particular a display module therefore which contains its own alarm system and power supply, and which supports a security sensor which is attached to an item of merchandise, and in which electric power can be supplied to the protected item from a remote source of power to maintain a charge on the internal battery of the item or supply electric power to other components of the item of merchandise. Furthermore, there is a need for a display module which has a self-contained alarm which protects the product secured thereon enabling the display module to be placed at various locations without being attached to a central alarm system or remote source of electric power. 
   BRIEF SUMMARY OF THE INVENTION 
   One aspect of the present invention is to provide a security system which includes a unique display module which supports a sensor that is attached to an item of merchandise with an alarm system being self-contained in the display module and which sounds an alarm should a thief attempt to remove the item of merchandise from the attached sensor or the display module from the display location. 
   Another feature of the present invention is to provide a security system in which the display module has a power inlet port enabling electrical conductors to be easily connected to the power port and to a remote source of electricity so that electric power can be provided through the display module to the sensor for supplying electric power to the item of merchandise attached to the sensor for maintaining the charge on an internal battery of the item or for controlling other features of the protected item of merchandise requiring electric power, independent of the battery within the display module used to provide power for the alarm system. 
   A further feature of the present invention is to provide a security system in which either or both the display module and/or sensor has a visual indicator such as an LED, indicating to a clerk or potential thief that an alarm system is activated and that the displayed item of merchandise is protected by an alarm system. 
   Another aspect of the present invention is to enable the display module of the security system to be electrically and mechanically connected to the sensor by a lanyard or power cord which extends between the sensor and a power output port on the display module for supplying electric power through the sensor to the protected item of merchandise. 
   Another feature of the present invention is to provide either or both of the display module and sensor of the security system with a switch which is activated when the module is attached to a support structure and sensor attached to the item by automatically depressing a plunger switch to activate an internal alarm contained in the display module, which alarm is powered by a battery located within the display module. 
   Still another feature of the present invention is to provide a power input port on a base of the display module with a jack that is adapted to receive various types of connectors for supplying electric power to the item of merchandise through the security sensor from a remote source of electricity. 
   A further aspect of the present invention is that the power cord which connects the display module to the sensor contains a plurality of electrical conductors which are connected to the output port on the display module and to the internal alarm system with an easily attached removable connector to enable various sensors to be easily mounted on the display module, yet which will sound the internal alarm of the display module if the power cord is removed from the display module or the conductors thereof severed by a potential thief, and in which the power cord preferably contains six electrical conductors, two of which power a security plunger switch mounted within the sensor with two other of the conductors powering a visual indicator (LED) provided in the sensor, with the other two conductors being connected to a power output jack of the sensor from which electric power is supplied to the item of merchandise attached to the sensor. 
   Another feature of the invention is to provide the alarm module and sensor with a pair of magnets providing self-orientation of the displayed item when returned to the alarm module. 
   A further aspect of the invention is to provide the display module which displays a product in a secure position on a removable sensor mounted on the product with its own internal alarm system power by an internal battery to provide a one-to-one relationship, that is, each displayed product is protected by its own alarm system, even if an external source of electric power is not used to supply power to the displayed product. 
   A further feature of the present invention is to provide alarm circuitry in the display module in which an internal audible alarm is powered by an external power source connected to the display module and is automatically switched to an internal battery for powering the audible alarm in the event of a power failure or the unavailability of the external power source. This will extend the life of the internal battery and will provide another level of security to the security system of the present invention. 
   These objectives and features are obtained by the security system of the present invention for displaying and protecting a displayed product, the general nature of which may be stated as comprising a display module mounted on a support; a sensor removably mounted on the display module and connected to the displayed product; a remote source of electric power; a first power cord electrically connecting the display module to the source of electric power; a second power cord electrically and mechanically connecting the display module to the sensor; a third power cord electrically and mechanically connecting the sensor to the displayed product; wherein the first, second and third power cords provide an electrical path extending from the remote source of electric power through the display module and to the displayed product; and an alarm circuit contained in the display module having a self-contained power source providing sense loops through the second and third power cords and an audible alarm actuated upon the integrity of either of the second and third power cords being compromised. 

   
     DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS 
     A preferred embodiment of the invention, illustrated of the best mode in which Applicant contemplates applying the principles, is set forth in the following description and is shown in the drawings and is particularly and distinctly pointed out and set forth in the appended claims. 
       FIG. 1  is a side elevational view with portions in section of the security system and display module of the present invention. 
       FIG. 2  is an exploded perspective view of the display module component of the security system shown in  FIGS. 2A and 2B . 
       FIG. 3  is a diagrammatic top perspective view of the alarm circuitry contained in the display module of the security system. 
       FIG. 4  is a partially exploded view of the security system and display module as shown in  FIG. 1 . 
       FIG. 5  is a sectional view of one type of security sensor for use with the display module of the security system of the present invention. 
       FIG. 6  is a diagrammatic wiring diagram of the security system of the present invention. 
       FIG. 7  is a fragmentary top plan view of one of the connecting power supply cords. 
       FIG. 8  is a diagrammatic top plan view of another one of the connecting power supply cords. 
       FIG. 9  is a schematic diagram of a modified circuit for the security system of the present invention. 
   

   Similar numbers refer to similar parts throughout the drawings. 
   DETAILED DESCRIPTION OF THE INVENTION 
   The security system of the present invention is indicated generally at  1 , and is shown particularly in  FIG. 1 . Security system  1  includes as its main component a display module indicated generally at  3  containing an internal alarm system, and a security sensor indicated generally at  5  for protecting a product or item of merchandise  7  attached to sensor  5 . Product  7  is illustrated as a cell phone, but can be numerous types of products. 
   Display module  3  is intended to be secured to a support  9  by a plurality of fasteners  11  and includes a base  13  and a support column or housing  15  extending upwardly therefrom. Housing  15  is mounted within an irregular-shaped recess  17  ( FIG. 2B ) formed in base  13  by fasteners  14 . A cover plate  19  ( FIG. 2A ) is formed with an oval-shaped opening  20  through which housing  15  extends. As shown in  FIGS. 1 and 2B , fasteners  11  extend through a plurality of holes  21  formed in base  13  for securing the base on support surface  9 . Base  13  is formed with a central hole  23  for passage of conductors therethrough for the various functions as discussed below. Referring to  FIG. 2A , a platform  25  is mounted on a cap  27  by a plurality of fasteners  28  with cap  27  being formed with a cylindrical-shaped recess  29  for receiving a ring-shaped magnet  31  therein. Platform  25  is formed with a central opening  33  in which is inserted a projection  35  formed on sensor  5  ( FIG. 5 ) which contains a second magnet  36  to provide a self-orienting type of sensor and display module arrangement such as shown and described in pending patent application Ser. No. 11/454,513. However, it is readily understood that numerous other types of sensor constructions and mounting arrangements with alarm module  3  can be utilized for removably mounting sensor  5  on top of display module  3  without affecting the concept of the invention. Display module  3  is also similar in many respects to that disclosed in pending patent application Ser. No. 11/454,513, filed Jun. 16, 2006, and Ser. No. 11/431,291, filed May 10, 2006, the contents of which are incorporated herein by reference. 
   In accordance with one of the features of the invention, display module  3  contains an alarm circuitry ( FIGS. 2B and 3 ) which is indicated generally at  39 , which is mounted on an oval-shaped mounting plate  41  which is mounted within the interior of base  13  by a plurality of fasteners  42 . The alarm circuitry includes a battery housing  43  in which a battery  45  is secured by a battery closure door  46  and a fastener  44 . Battery  45  is in contact with a pair of battery terminals  55 . Alarm circuitry  39  further includes an LED  47  which is operationally connected to a printed circuit board microprocessor  49 . LED  47  is visible through an opening  50  formed in base  13  and an aligned opening  51  formed in cover plate  19 . An audible alarm such as a piezo electric alarm  53  is connected to circuit board  49  and is located within a circular hole  54  formed in mounting plate  41 . The alarm circuitry also is connected to a plunger switch  16  mounted within base  13  which includes a plunger  18  which extends through a hole in mounting plate  41  and is depressed to activate the alarm when alarm module  3  is mounted on support  9  as shown in  FIG. 1 . The particular details of alarm circuitry  39  and printed circuit board  49  are not shown in further detail, but are well-known in the alarm art. This arrangement provides a single display module  3  with its own self-contained alarm circuit  39  powered by its own battery  45  for protecting a product  7  secured on sensor  5  as discussed further below. 
   In accordance with another of the features of the invention, a remote source of electric power  57  is connectable to display module  3  by a first power cord  59  which preferably contains a pair of conductors  60  and  61  and may include a pair of connectors  63  and  63 A which connect cord sections  59 A and  59 B which combine to form power cord  59 . Cord section  59 B preferably extends through a hole  65  formed in support  9  and terminates in a plug  67  which has a terminal end connector  69  which extends into and is electrically connected to a power input jack  70  mounted in base  13 . Power supply  57  preferably will be a usual 120V AC supply readily available throughout a retail store and usually will include a transformer  71  which will convert the 120V AC to a DC voltage, generally in the range of 3V to 9V DC, which voltage is supplied to most types of battery-powered equipment for recharging the internal battery of the type of item to be displayed on display module  3 . However, this voltage can change without affecting the concept of the invention. 
   However, in accordance with another feature of the invention, the 120V AC power can be supplied directly to display module  3  which contains the appropriate circuitry for converting the AC voltage to a DC voltage for supplying the desired DC voltage to the displayed product as discussed further below with respect to  FIG. 9 . Likewise, for other applications, a greater DC voltage than the 3V to 9V discussed above could be supplied to display module  3  where this greater DC voltage is stepped down to the voltage required by the particular product secured to sensor  5 . 
   A power output jack  73  is mounted within housing  15  of display module  3  and receives a plug  75  therein which is mounted on one end of a second power cord  77 . Power cord  77  preferably has a coiled extensional arrangement enabling it to extend outwardly when a customer is inspecting product  7  and will contain a plurality of electrical conductors. The other end of power cord  77  preferably is hardwired into sensor  5  as shown in  FIG. 5 , which sensor is removably seated on the upper end of housing  15 . However, if desired, power cord  77  could be secured to sensor  15  by a plug-in type of attachment without affecting the concept of the invention. Sensor  5  ( FIG. 5 ) preferably includes an internal plunger switch  79  which contains a plunger  80  which is depressed to actuate switch  79  when sensor  5  is secured to product  7  such as by a strip of pressure sensitive adhesive  81 , a zip tie or various other types of attachment. If desired, an LED  83  may be incorporated into sensor  5  and connected to battery  45  of the security system as discussed further below. 
   A power jack  85  is mounted within sensor  5  for receiving a terminal  87  of a plug  88  therein. Plug  88  is mounted on one end of a third power cord  89  which terminates at a second end in a plug  91 . Plug  91  has an end terminal configuration  92  which is configured to match the electrical contacts in the receptacle or jack  93 . A receptacle or jack  93  is provided on most types of powered products, of the type intended for display on module  3 , in order to charge the internal battery of the product or provide power to other components of the displayed product. A particular power cord  89  will be chosen that has a plug  91  attached thereto that is compatible with the particular receptacle  93  of the particular product to be displayed on module  1 . The contacts of receptacle  93  will vary depending upon the particular manufacturer of the product in which it is incorporated and the merchant will have several types of power cords  89  that have the particular configured plug  91  on one end thereof in order to be compatible with receptacle  93  of the particular product displayed on module  3 . Plug  88  preferably is a standard type of a readily available plug having a cylindrical configured terminal  87  formed therein and can be used for connection to power jack  85  incorporated in sensor  5 . However, if desired, power cord  89  can be hardwired to sensor  5  without affecting its operation and manner of use. 
     FIG. 6  is a diagrammatic wiring diagram of one type of electrical circuit which can be used in security system  1  to provide one of the main features of the invention, that is, the supplying of electric power to displayed product  7 . As shown in  FIG. 6 , power cord  77  preferably contains six conductors  94 ,  95 ,  96 ,  97 ,  98  and  99  which extend between power output jack  75  and sensor  5 . Conductors  94  and  99  connect power input jack  70  with power output jack  73  and are connected to conductors  60  and  61  of power cord  59 . These two conductors  94  and  99  continue through sensor  5  and are connected to power output jack  85  of sensor  5  and supply the electric power to the contacts of receptacle  93  of displayed product  7  through power cord  89 . These conductors provide the DC power from remote power source  57  and transformer  71  to the displayed product. If desired, conductors  94  and  99  could lead directly from power input jack  70  to power output jack  75  or can be connected to the printed circuit board of alarm module  3  if desired. Conductors  95  and  98  connect to plunger switch  79  with conductors  96  and  97  being connected to LED  83 . 
   In accordance with another feature of the invention, power supply cord  59 , and in particular section  59 A extending between connector  63  and power supply transformer  71  will be the same as that usually supplied with the particular product  7  to be displayed on module  3  which will ensure that the correct amount of power (DC voltage) is supplied from power supply  57  to product power input jack  93 . Therefore, the display module of the present invention, in addition to removably supporting sensor  5  thereon which is attached to the displayed product, provides electrical power from a remote source to the sensor, with the sensor being mechanically and electrically connected to display module  3  by power cord  77  in a simple effective manner. This connection to the remote source of electricity enables the battery contained within the displayed product to remain charged at all times and can be used to supply electricity to other components of the displayed product making it more attractive to a perspective customer since he/she is able to see the product in its full operating condition. It also avoids sales personnel from constantly checking to see if the displayed product is supplied with the necessary internal power for satisfactory operation of its various functions. Furthermore, plunger switch  16  will provide security against unauthorized removal of the alarm module from support  9 , and in combination with plunger switch  79  in sensor  5  provides the additional protection for the displayed product. 
   Thus the security system of the present invention provides a system which supplies electric power from a remote source through a display module and sensor to a product attached to the sensor to ensure that an internal battery of the displayed product remains energized, as well as supplying power at the correct voltage to other electrical components of the displayed product. As indicated above and as shown in  FIGS. 1 ,  7  and  8 , various conductors and plug configurations are utilized whereby the particular transformer  71  and plug  63 , which is compatible with power input jack  93  of the displayed product, is utilized for connection to the remote power source  57  thereby ensuring that the correct voltage is supplied through transformer  71  and ultimately to product  7 . Connection  63 A will be chosen to be complementary to the contacts within plug  63  so as to be electrically and mechanically connected thereto as shown in  FIG. 1 . Plug  67  can be a standard type of plug having a cylindrical terminal  69  used for various plug configurations in combination with plug  63 A for use with power input jack  70 . Likewise, plug  88  can have the same cylindrical type terminal  87  for the various power cords  89  which will require a different plug  91  on the opposite end thereof for compatibility with product input jack  93 . Output jack plug  75  can be a removable clip-type plug as shown in  FIGS. 1 and 4 , or if desired, be eliminated by hardwiring the conductors of power cord  77  to the corresponding conductors within housing  15 . Likewise as discussed above, power cord  77  can be hardwired into sensor  5  or removably attached by a jack (not shown) without affecting the concept of the invention. 
   Also, in accordance with another feature of the invention, the self-contained alarm system  39  which includes audible alarm  53  and battery  45  is mounted within display module  3  and is dedicated to protecting the single product  7  secured to sensor  5 . This protection is provided whether display module  3  is or is not connected to the remote source of electricity. This enables the display module and sensor to be placed at various locations and the product attached to sensor  5  to be periodically replaced without disturbing adjacent displayed products and alarm systems. 
   It is readily understood that alarm circuitry  39  will sound alarm  53  upon actuation of plunger switch  79  upon the removal of product  7  from sensor  5  or upon actuation of plunger switch  16  upon removal of alarm module  3  from support  9 . Likewise, the alarm circuitry provides a sense loop through power cords  77  and  89  which will sound an alarm if plug  91  is removed from product  7  or from sensor  5 , or if plug  75  is removed from power output jack  73 , or if either power cord  77  or  89  is severed. The alarm circuitry can be configured that upon removal of plug  67  from input jack  70  alarm  53  will sound, all of which provides additional security to the security system of the present invention. Likewise, LEDs  47  and  83  will be fully illuminated or blinking upon the alarm system being activated, which will notify the store personnel and a potential thief that the merchandise is protected by an active alarm system. 
     FIG. 9  shows a modified schematic wiring diagram which can be utilized in the security system of the present invention. Electric power is supplied to the printed circuit board  49  and the alarm circuitry and in particular audible alarm  53 , either from the remote 120V AC power supply or from internal battery  45 . This modified schematic is indicated generally at  100 , and includes two main portions  101  and  102 . Circuit portion  101  contains the power supply circuitry and includes as its main components inputs  103  which connect to the remote source of 120V AC power and to a transformer (not shown) which converts this AC power to a DC voltage, for example, 5-18V DC. A linear regulator  105  converts this DC input voltage to a DC output voltage, for example 4.6V DC. Another linear regulator  107  converts this 4.6V DC to a desired DC voltage for microprocessor  49 , for example 3.3V DC. Four diodes  108 ,  109 ,  110  and  111  provide a switching function as discussed below. A transistor  113  provides a signal to printed circuit board  49  through conductor  115  indicating to board  49  that it is being powered either by the external power source or internal battery  45 . 
   Alarm circuitry  102  is a standard alarm circuitry of the type used to protect displayed products wherein a sense loop is provided in one or more conductor cables attached to the protected product and/or attached sensor or to one or more plunger or pressure switches which connect the product to a sensor or a display module to a support structure. Likewise, alarm circuitry supplies power to various visual indicators  47  and  83  (LED) as discussed above or can be used to program security codes etc. into the system, some of which are not utilized in the present invention. 
   In normal operation, the 120V AC supply is used to supply the desired DC voltage to printed circuit board microprocessor  49  through linear regulators  105  and  107  and other circuit components. In the event of a power failure of the 120V AC power supply, switching diodes  108 - 111  will immediately switch the power supply for the alarm circuitry to battery  45  which then supplies the power to circuit board  49 , the various sense loops, audible alarm  53  and the various safety pressure switches. The appropriate signal is then supplied through transistor  113  and conductor  115  to circuit board  49  as discussed above. This ensures that the displayed product is protected from theft and still can be supplied with the desired DC voltage for its operation by its own internal battery even when the main AC power source is interrupted. It also avoids using battery  45  until required to protect the displayed product by using the remote source of AC power. 
   The 4.6V DC output of linear regulator  105  preferably is used to supply the necessary voltage to LED  83  and to the piezo speaker  53  and which will always be greater than the supply voltage, for example the 3.3V for microprocessor  49 . Also, the DC power supply from remote AC source, preferably will always be higher than the DC voltage of 4.6 provided by the output of linear regulator  105 . 
   In the foregoing description, certain terms have been used for brevity, clearness, and understanding. No unnecessary limitations are to be implied therefrom beyond the requirement of the prior art because such terms are used for descriptive purposes and are intended to be broadly construed. The term “mechanically connected” as used herein means that the power cord provides a physical attachment between the separate items or components in addition to providing an electrical path therebetween. 
   Moreover, the description and illustration of the invention is an example and the invention is not limited to the exact details shown or described.