Patent Publication Number: US-2012032784-A1

Title: Magnetic Sensing Bar Assembly with Multiple Functions

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a sensing device and, more particularly, to a magnetic sensing bar assembly. 
     2. Description of the Related Art 
     A conventional EM sensing system  11  in accordance with the prior art shown in  FIG. 4  comprises an elongate substrate  111  and a plurality of magnetized pieces  112  mounted on the elongate substrate  111 . Thus, when the EM sensing system  11  is bonded onto a merchandise, such as a book and the like, the EM sensing system  11  can provide an identification function. However, the EM sensing system  11  does not have an information storage function. 
     A conventional RFID sensing system  12  in accordance with the prior art shown in  FIG. 5  comprises a label paper  121 , a RF chip  122  mounted on the label paper  121  and an antenna  123  mounted on the label paper  121  and connected with the RF chip  122 . Thus, when the RFID sensing system  12  is bonded onto a merchandise, such as a book and the like, the identification information stored in the RF chip  122  is transmitted by the wireless waves of the antenna  123 . However, the RFID sensing system  12  has a larger volume and cannot be hidden easily so that the RFID sensing system  12  is often bonded onto the outside of the merchandise and is easily torn by a person intentionally. 
     BRIEF SUMMARY OF THE INVENTION 
     In accordance with the present invention, there is provided a magnetic sensing bar assembly, comprising a RFID (radio frequency identification) unit, an EM (electromagnetic) unit abutting the RFID unit, a top covering paper abutting the EM unit and a bottom covering paper abutting the RFID unit. 
     The RFID unit and the EM unit are sandwiched between the top covering paper and the bottom covering paper. The RFID unit includes a RF (radio frequency) chip and an antenna connected with the RF chip. The antenna of the RFID unit has a strip shape. The EM unit includes an elongate substrate and a plurality of magnetized pieces mounted on the elongate substrate. The magnetized pieces of the EM unit are spaced from each other. The EM unit contains a partial profile of the antenna of the RFID unit. The top covering paper has a first side abutting the EM unit and a second side provided with a top release paper which is detachably mounted on the top covering paper. The top covering paper is preferably a sticker. The bottom covering paper has a first side abutting the RFID unit and a second side provided with a bottom release paper which is detachably mounted on the bottom covering paper. The bottom covering paper is preferably a sticker. The magnetic sensing bar assembly has an elongate thin shape. The RFID unit is sandwiched between the EM unit and the bottom covering paper. The EM unit is sandwiched between the RFID unit and the top covering paper. 
     The primary objective of the present invention is to provide a magnetic sensing bar assembly having multiple functions. 
     According to the primary advantage of the present invention, the magnetic sensing bar assembly combines the function of an EM sensing system and a RFID sensing system, thereby enhancing the versatility of the magnetic sensing bar assembly. 
     According to another advantage of the present invention, the magnetic sensing bar assembly has an elongate thin shape so that the magnetic sensing bar assembly can be placed in a book to have a hidden effect, thereby preventing the magnetic sensing bar assembly from being torn by a person intentionally so as to achieve an antitheft function. 
     According to a further advantage of the present invention, the magnetic sensing bar assembly has a shorter length so that the magnetic sensing bar assembly has a is available for an article having a smaller size. 
     Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING(S) 
         FIG. 1  is a perspective view of a magnetic sensing bar assembly in accordance with the preferred embodiment of the present invention. 
         FIG. 2  is an exploded perspective view of the magnetic sensing bar assembly as shown in  FIG. 1 . 
         FIG. 3  is a front cross-sectional view of the magnetic sensing bar assembly as shown in  FIG. 1 . 
         FIG. 4  is a perspective view of a conventional EM sensing system in accordance with the prior art. 
         FIG. 5  is a perspective view of a conventional RFID sensing system in accordance with the prior art. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Referring to  FIGS. 1-3 , a magnetic sensing bar assembly in accordance with the preferred embodiment of the present invention comprises a RFID (radio frequency identification) unit  20 , an EM (electromagnetic) unit  30  abutting the RFID unit  20 , a top covering paper  40  abutting the EM unit  30  and a bottom covering paper  50  abutting the RFID unit  20 . The RFID unit  20  and the EM unit  30  are sandwiched between the top covering paper  40  and the bottom covering paper  50 . 
     The RFID unit  20  includes a RF (radio frequency) chip  21  and an antenna  22  connected with the RF chip  21 . The antenna  22  of the RFID unit  20  has a strip shape. The antenna  22  of the RFID unit  20  is a super high frequency antenna that is made of an aluminum alloy. The RFID unit  20  is sandwiched between the EM unit  30  and the bottom covering paper  50 . 
     The EM unit  30  includes an elongate substrate  31  and a plurality of magnetized pieces  32  mounted on the elongate substrate  31 . The magnetized pieces  32  of the EM unit  30  are spaced from each other. The EM unit  30  is sandwiched between the RFID unit  20  and the top covering paper  40 . The EM unit  30  contains a partial profile of the antenna  22  of the RFID unit  20 . 
     The top covering paper  40  has a first side abutting the EM unit  30  and a second side provided with a top release paper  41  which is detachably mounted on the top covering paper  40 . The top covering paper  40  is preferably a sticker. 
     The bottom covering paper  50  has a first side abutting the RFID unit  20  and a second side provided with a bottom release paper  51  which is detachably mounted on the bottom covering paper  50 . The bottom covering paper  50  is preferably a sticker. 
     In the preferred embodiment of the present invention, the magnetic sensing bar assembly has an elongate thin shape. 
     Accordingly, the magnetic sensing bar assembly combines the function of an EM sensing system and a RFID sensing system, thereby enhancing the versatility of the magnetic sensing bar assembly. In addition, the magnetic sensing bar assembly has an elongate thin shape so that the magnetic sensing bar assembly can be placed in a book to have a hidden effect, thereby preventing the magnetic sensing bar assembly from being torn by a person intentionally so as to achieve an antitheft function. Further, the magnetic sensing bar assembly has a shorter length so that the magnetic sensing bar assembly has a is available for an article having a smaller size. 
     Although the invention has been explained in relation to its preferred embodiment(s) as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present invention. It is, therefore, contemplated that the appended claim or claims will cover such modifications and variations that fall within the true scope of the invention.