CN112990415A

CN112990415A - EAS + RFID dual-frenquency hard label

Info

Publication number: CN112990415A
Application number: CN202110387916.7A
Authority: CN
Inventors: 林超
Original assignee: Shangyang Rfid Technology Yangzhou Co ltd
Current assignee: Shang Yang Rfid Technology Yangzhou Co ltd; Hangzhou Century Co Ltd
Priority date: 2021-04-12
Filing date: 2021-04-12
Publication date: 2021-06-18

Abstract

An EAS + RFID dual frequency hard tag. An EAS + RFID dual frequency hard tag is provided that saves space and improves the performance of the combination. The RFID tag comprises a housing, the EAS label and the RFID label that set up from top to bottom are equipped with in the shell, the RFID label includes the RFID antenna, the RFID antenna includes antenna matching ring and radiation arm. The antenna matching loop and the radiating arm are both located below the vertical projection of the EAS tag. The antenna matching loop is located outside below the elevation of the EAS tag and the radiating arm is located below the elevation of the EAS tag. The number of the radiation arms is two, and the two radiation arms are designed asymmetrically; wherein a radiating arm extends below the vertical projection of the EAS tag. The invention saves space and reduces label cost.

Description

EAS + RFID dual-frenquency hard label

Technical Field

The invention relates to the technical field of RFID (radio frequency identification) tags, in particular to an EAS (electronic article surveillance) and RFID dual-frequency hard tag.

Background

Traditional EAS label has two kinds of forms (repeatedly usable) of soft label and hard label for discernment is detected through the detecting system who places the access & exit or the cash registering passageway department in market supermarket, when the label that does not have cashier's processing (soft label does not demagnetize or hard label does not take off) passes through the system, the system can send the warning, in order to remind staff's notice. The EAS label only can play the theftproof warning in the effect, can not realize the batch inventory and the source tracing to the goods.

At present, RFID (radio frequency identification) tag identification technology is introduced to be superposed into an EAS (electronic article surveillance) identification system in the market to make up for the defects of the EAS tag, but the states of the EAS tag and the RFID tag are mostly independent states, namely one EAS tag and one RFID tag are respectively arranged on one goods, and the EAS-RFID tag integrated soft tag is available in the market recently, but the application of the soft tag is usually disposable and serious in waste.

In summary, the combined application of the EAS hard tag and the RFID is undoubtedly a new trend, and functions such as theft prevention, repeated use for many times, product batch inventory, traceability and the like can be realized.

However, such designs are few in the market at present, and patent CN201721585771.7 mentions a design which is a completely separated and non-overlapping manner of an EAS coil part and an RFID part, which is a manner that hard tag size cannot be made small and RFID tag performance is susceptible to EAS coil position, and EAS and RFID tag performance is limited by size.

Disclosure of Invention

The invention aims at the problems and provides an EAS + RFID dual-frequency hard tag which saves space and improves the combination performance.

The technical scheme of the invention is as follows: comprises a shell, wherein an EAS label and an RFID label which are arranged up and down are arranged in the shell,

the RFID tag includes an RFID antenna including an antenna matching loop and a radiating arm.

The antenna matching loop and the radiating arm are both located below the vertical projection of the EAS tag.

The antenna matching loop is located on the outside below the vertical projection of the EAS tag,

the radiating arm is located below the vertical projection of the EAS tag.

The number of the radiation arms is two, and the two radiation arms are designed asymmetrically; wherein a radiating arm extends below the vertical projection of the EAS tag.

The radiation arms are two in number, and the two radiation arms are symmetrically designed.

The radiation arm is provided with one single arm type; the single arm radiating arm extends below the vertical projection of the EAS tag.

The single-arm type radiation arm is continuously bent.

And a plurality of slits are uniformly distributed on the single-arm type radiation arm.

Also included is a shimming layer located between the EAS tag and the RFID tag.

The material of the high layer of pad is for steeping cotton, the thickness of the high layer of pad is 0.5~1 mm.

The heightening layer is arranged in the shell.

The EAS label comprises a coil and a capacitor, wherein the coil is wound in a transverse winding mode or a longitudinal winding mode.

The single-arm type radiation arm is arranged in a linear direction or a J-shaped direction.

In the working process, the EAS label and the RFID label are vertically stacked in the shell, so that the design space is effectively utilized, the performance of the label is met, the space is saved, and the cost of the label is reduced.

Drawings

Figure 1 is a schematic view of the structure of the present invention,

figure 2 is a cross-sectional view one of figure 1,

figure 3 is a cross-sectional view two of figure 1,

figure 4 is a schematic diagram of the structure of a first embodiment of an RFID antenna,

figure 5 is a schematic diagram of the structure of a second embodiment of an RFID antenna,

figure 6 is a schematic diagram of the structure of a third embodiment of an RFID antenna,

figure 7 is a schematic diagram of the structure of the transverse windings of the coil,

figure 8 is a left side view of figure 7,

figure 9 is a schematic diagram of the structure of the longitudinal windings of the coil,

figure 10 is a left side view of figure 9,

FIG. 11 is a view of the EAS coil portion and the RFID portion in a fully separated, non-overlapping manner; and a performance test pattern in which both the antenna matching loop and the radiating arm are located below the vertical projection of the EAS tag;

FIG. 12 is a performance test chart with the antenna matching loop located on the outside below the elevation projection of the EAS tag and the radiating arm located below the elevation projection of the EAS tag;

in the figure, 1 is a housing, 11 is an upper housing, 12 is a lower housing,

2 is an EAS tag, 21 is a coil, 22 is a capacitor,

3 is an RFID tag, 31 is an RFID antenna, 311 is an antenna matching loop, 312 is a radiating arm, 313 is a single-arm radiating arm, 3130 is a slot,

4 is a padding layer, 5 is a lock core, and A is an antenna matching loop area.

Detailed Description

The invention is shown in fig. 1-10, comprising a housing 1, an EAS tag 2 and an RFID tag 3 arranged up and down are arranged in the housing,

the RFID tag 3 comprises an RFID antenna 31 comprising an antenna matching loop 311 and a radiating arm 312.

According to the invention, the EAS label and the RFID label are stacked up and down in the shell, so that the design space is effectively utilized, the label performance is met, meanwhile, the space is saved, and the label cost is reduced.

The housing comprises an upper shell 11 and a lower shell 12, which are connected by a lock cylinder 5. The RFID label also comprises a radio frequency chip, and the radio frequency chip is connected with the RFID antenna through a conductive adhesive.

The antenna matching loop area A is mainly used for impedance matching with a radio frequency chip, and the radiation arm is used for adjusting antenna gain, radiation efficiency and the like.

The antenna matching loop area A of the RFID antenna is square, circular or in other special shapes. The different shapes are set to have the following functions: firstly, aiming at the impedance adjustment of the same chip application and different required frequency bands; and secondly, performing impedance matching aiming at chips of different models.

The antenna matching loop 311 and the radiating arm 312 are both located below the vertical projection of the EAS tag.

Therefore, the size of the EAS label can be increased and the performance can be improved under the requirement that the EAS coil part and the RFID part in the prior art have the same appearance size in a completely separated and non-overlapped mode.

The antenna matching loop 311 is located on the outside below the vertical projection of the EAS tag 2,

the radiating arm 312 is located below the vertical projection of the EAS tag.

Because the antenna matching ring area in the RFID label and the coil in the EAS label are in a concentric mode (namely the antenna matching ring is positioned below the vertical projection of the EAS label), mutual inductance exists between the two coils, the EAS label is an LC oscillating circuit formed by combining an inductance coil and a capacitance device, and alternating current with changed direction can continuously appear, so that the RFID label antenna matching ring area generates changed induced electromotive force to influence the performance of the RIFD label.

The antenna matching loop area in the RFID label is not under the vertical projection of the EAS label (namely extending to the outside of the EAS label), and the radiation arm and the coil of the EAS label are stacked up and down, so that the combination performance and consistency of the EAS label and the RFID label are improved, and the phenomenon of serious performance attenuation or frequency deviation of the RFID label is avoided.

As shown in fig. 4, the radiating arms 312 have two, two radiating arms are asymmetric in design; wherein a radiating arm extends below the vertical projection of the EAS tag.

Therefore, the antenna gain is increased, and the performance of the RFID tag is improved.

The radiating arms 312 have two, which are of symmetrical design.

The radiation arm is provided with one single arm type; the single arm radiating arm 313 extends below the vertical projection of the EAS tag.

In this way, the impact of the EAS tag on the performance of the RFID tag is reduced.

As shown in fig. 5, the single-arm type radiation arm 313 is continuously bent.

As shown in fig. 6, a plurality of slits 3130 are uniformly distributed on the single-arm radiation arm.

Therefore, the bandwidth of the antenna is increased, and the adaptability of the performance of the RFID tag is improved.

Also included is a bedding layer 4, which is located between the EAS tag and the RFID tag.

And arranging a padding layer, and performing padding design to weaken the interference between the EAS label and the RFID label.

The high layer of pad can be selected as required, for example set up the bubble cotton, and thickness is selected to set up according to the size.

The heightening layer is arranged in the shell.

The high-rise cushion layer can be directly integrated with the shell, and is convenient and reliable.

As shown in fig. 7-10, the EAS tag 2 includes a coil 21 wound in either a transverse or longitudinal direction and a capacitor 22.

The EAS label includes metal wire winding and electric capacity, and the metal wire winding can be according to the hard label size of demand and the resonant frequency of demand and carry out the coiling, and the finished product external dimension after the wire winding is for not fully covering hard label design, reserves RFID label antenna matching ring district size, and this reservation region needs to be located the EAS label outside.

Winding in the horizontal direction or winding in the vertical direction, and being suitable for requirements of different sizes; and the performance influence of the EAS label on the RFID label can be effectively reduced by a longitudinal winding mode.

The linear or J-shaped antenna gain is increased, and the performance of the RFID tag is improved; wherein the J-shape may attenuate the EAS effect on the performance of the RFID tag.

The abscissa in fig. 11 and 12 is the sweep range (800 MHz-1000 MHz); the ordinate represents the amount of power required by the reader/writer to activate the RFID tag.

The curves in fig. 11 and 12 refer to the activation power required by the RFID tag at each power point using a frequency sweep test of the RFID tag using the RFID reader.

Through testing, the antenna matching ring area in the RFID label is not below the vertical projection of the EAS label, and the radiation arm and the coil of the EAS label are stacked up and down, so that the combination performance and consistency of the EAS label and the RFID label are improved.

The consistency refers to that the RFID reader-writer is used for carrying out frequency sweep test on the RFID label (wherein the RFID reader-writer is Voyantic tag force acknowledged in the RFID industry), the frequency sweep test is carried out on the same label for multiple times or on multiple labels of the same type, and the difference value of the label activation power corresponding to each frequency point can be controlled within 3dBm within 800 MHz-1000 MHz frequency points.

The disclosure of the present application also includes the following points:

(1) the drawings of the embodiments disclosed herein only relate to the structures related to the embodiments disclosed herein, and other structures can refer to general designs;

(2) in case of conflict, the embodiments and features of the embodiments disclosed in this application can be combined with each other to arrive at new embodiments;

the above embodiments are only embodiments disclosed in the present disclosure, but the scope of the disclosure is not limited thereto, and the scope of the disclosure should be determined by the scope of the claims.

Claims

1. An EAS + RFID dual-frequency hard tag comprises a shell, and is characterized in that the EAS tag and the RFID tag are arranged up and down in the shell,

2. An EAS + RFID dual frequency hard tag as claimed in claim 1, wherein the antenna matching loop and radiating arm are both located below the vertical projection of the EAS tag.

3. An EAS + RFID dual frequency hard tag as claimed in claim 1, wherein the antenna matching loop is located outside below the elevation projection of the EAS tag,

the radiating arm is located below the vertical projection of the EAS tag.

4. An EAS + RFID dual frequency hard tag as claimed in claim 2 or claim 3, wherein there are two radiating arms, the two radiating arms being of asymmetric design; wherein a radiating arm extends below the vertical projection of the EAS tag.

5. An EAS + RFID dual frequency hard tag as claimed in claim 2 or claim 3, wherein the radiating arms are of two, symmetrical design.

6. An EAS + RFID dual frequency hard tag as claimed in claim 2 or claim 3, wherein the radiating arm has one, single arm; the single arm radiating arm extends below the vertical projection of the EAS tag.

7. An EAS + RFID dual frequency hard tag as claimed in claim 6, wherein the single arm radiating arm is continuously bent.

8. An EAS + RFID dual frequency hard tag as claimed in claim 6, wherein the single arm radiating arm is provided with slots.

9. An EAS + RFID dual frequency hard tag as claimed in any one of claims 1 to 3, further comprising a shimming layer located between the EAS tag and the RFID tag.

10. An EAS/RFID dual-frequency hard tag as claimed in claim 9, wherein the material of the said upper layer is foam, and the thickness of the said upper layer is 0.5-1 mm.

11. An EAS + RFID dual frequency hard tag as claimed in claim 9 wherein said booster layer is disposed within the housing.

12. An EAS + RFID dual frequency hard tag as claimed in any one of claims 1 to 3, wherein the EAS tag comprises a coil and a capacitor, the coil being wound either in a transverse or longitudinal direction.

13. An EAS + RFID dual frequency hard tag as claimed in claim 6, wherein the single arm radiating arm is arranged in a linear orientation or in a J-shaped orientation.