CN203800968U - External device of mobile terminal - Google Patents

Abstract

The utility model provides an external device of a mobile terminal, which is used for solving a problem that most of the mobile terminals at present do not have an NFC-SWP function and are high in replacement cost. The external device of the mobile terminal comprises an SIM card tray, an NFC chip and an NFC antenna, wherein the SIM card tray can bear the weight of an SIM card of the mobile terminal and can be inserted into an SIM card position of the mobile terminal; the SIM card tray leads a pin C1, a pin C5 and a pin C6 of the SIM card of the mobile terminal to the outer wall of the SIM card tray and forms three internal contacts correspondingly; the pin C1, the pin C5 and the pin C6 are connected with the NFC chip through the corresponding internal contacts; and the NFC antenna is connected with the NFC chip. The external device provided by the utility model can enable a mobile terminal without an NFC function to have the NFC-SWP function with an extremely low cost. The external device provided by the utility model reduces the application cost for users and is more conducive to popularization of NFC near field payment.

Description

A kind of external device of mobile terminal

[technical field]

The utility model relates to wireless communication field, especially a kind of external device of mobile terminal.

[background technology]

NFC (Near Field Communication near-field communication) is a kind of emerging technology of this develop rapidly in several years, by Sony, Philips and Nokia, proposed, it makes two electronic equipments directly can carry out the communication of short distance, is operated in 13.56MHz frequency range, several centimetres of operating distances.NFC technical goal is the Near Field Communication between electronic equipment, mainly realizes three class functions: contactless ic card analog functuion; Point-to-Point Data communication function; Card reader function.The appearance of NFC technology, has greatly promoted the fusion of RFID (Radio Frequency Identification, radio frequency identification) technology and mobile communication technology to make progress, and causes many new application models.

On December 14th, 2012, Central Bank formally issues China's finance mobile payment series technique standard, defines 13.56MHz as the standard of mobile payment.There has been clear and definite target in the operator of once hovering between 2.4GHz and 13.56MHz.With 13.56MHz, make the near field payment technology scheme of standard and divide again three kinds: the one, NFC module is packaged in mobile phone hardware; The 2nd, be incorporated on SD card; The 3rd, NFC-SWP (Single Wire Protocol, single line agreement) scheme, is stored in security module on Mobile phone card exactly.Wherein, NFC-SWP scheme is the international standard of General Open.At the beginning of 2012 12 months, China Mobile just represents, plans within 2013, to sell more than 1,000 ten thousand NFC mobile phone terminals, progressively mobile subscriber is given tacit consent to the SIM card of providing with NFC function.After CHINAUNICOM and China Mobile, China Telecom announces, starts NFC-SWP pilot, and scale is thrown in NFC-SWP card, and starts terminal customization.

But current most of mobile terminal, mobile phone and SIM card thereof, for example Iphone4/4s/5 does not possess NFC function, but user group is very large again.If realize the function of NFC-SWP, just need to change mobile phone and SIM card, too huge for user's cost like this, be unfavorable for popularization and development that NFC near field pays.

[summary of the invention]

The utility model provides a kind of external device of mobile terminal, in order to solve current most of mobile terminal, does not possess NFC-SWP function, the problem that replacement cost is higher.

The external device of mobile terminal of the present utility model, comprising: can carry the SIM card of mobile terminal and can insert SIM card Kato, NFC chip and the NFC antenna of the screens of described mobile terminal SIM card; Wherein, described SIM card Kato leads to the outer wall of described SIM card Kato by the C1 pin of mobile terminal SIM card, C5 pin and C6 pin, and forms corresponding 3 inner contact; Described C1 pin, C5 pin and C6 pin are connected with NFC chip by corresponding inner contact; Described C6 pin is high-voltage signal pin, and C1 pin is supply voltage pin, and C5 pin is grounding pin; Wherein, NFC antenna is connected with NFC chip.

Wherein, described NFC chip and NFC antenna are integrated on the shell matching with described mobile terminal, are also provided with 3 external contact that are connected with NFC chip on described shell; Described C1 pin, C5 pin and C6 pin are connected with NFC chip by corresponding 3 inner contact, specifically: 3 described external contact are corresponding with 3 inner contact positions, after described mobile terminal and shell clamping, described external contact is connected with corresponding inner contact respectively.

Wherein, described shell comprises: flexible PCB plate and medium shell; Wherein, the upper and lower surface of flexible PCB plate is provided with copper paving area, and 3 described external contact are connected with NFC chip with the printing copper cash of NFC antenna by described copper paving area; Described flexible PCB plate is compressed in the middle of described medium shell.

Wherein, the copper paving area of described flexible PCB plate is etched to described NFC antenna.

The external device of mobile terminal of the present utility model, by the Kato of mobile terminal is carried out to small improvement, the internal hardware of mobile terminal is not carried out to large-scale redevelopment, do not affect outward appearance and the function of mobile terminal, do not need to change smart machine, only need extremely low cost just can make to have without the mobile terminal of NFC function the function of NFC-SWP, for user, reduced application cost.For operator, be more conducive to the popularization that NFC near field pays.

[accompanying drawing explanation]

Fig. 1 is the schematic diagram of the utility model embodiment;

Fig. 2 is the apparatus structure schematic diagram of the utility model embodiment 1;

Fig. 3 is the apparatus structure schematic diagram of the utility model embodiment 2.

[embodiment]

Mobile operator is playing the part of very important role in NFC promotes at present, according to the demand of mobile operator, it is a kind of by RFID application or NFC application and the scheme that mobile operator is associated together that NFC implementation need to provide, and also needs a kind of by the scheme that RFID applies or NFC should be associated with SIM card.

Inventor finds after deliberation, and SIM card C6 pinout is VPP at present, is the high-voltage signal of the inner nonvolatile memory programming of card use.The inner nonvolatile memory using of IC-card be take EEPROM as main, also has and uses Flash memory, and wiping and writing of this class memory all needs higher program voltage, and in 12V～20V left and right, C6 pin is defined as this high pressure and introduces use conventionally.Progress along with semiconductor technology and chip design art, existing IC-card all adopts chip internal charged pump circuit, by VCC power supply, pump the programming high pressure that nonvolatile memory needs, so for C6 pin, the voltage of VPP no longer need to be added by outside, and the function of VPP is out-of-date.To sum up, inventor's research redefines use by C6 pin.Single line connection scheme based on C6 pin, connection interface comprises three lines: supply voltage VCC (C1), ground connection GND (C5), high-voltage signal SWP (C6), wherein on holding wire of SWP, based on voltage and load-modulate principle, realize full duplex communication, can realize like this SIM card and under ISO7816 interface definition, support 7816 and two interfaces of SWP simultaneously, and reserve the pin of expansion the 3rd high speed (USB) interface.Support the SIM card of SWP must support ISO and two protocol stacks of SWP, the COS that needs SIM is the OS system of multitask simultaneously, and these two parts need to manage independently, and the RST signal at ISO interface can not partly exert an influence to SWP.

Based on above-mentioned consideration, shown in Figure 1, inventor thinks need to be by C1 (VCC) pin 121 of NFC chip 11 and SIM card 12, and C5 (GND) pin 122 is connected with C6 (SWP) pin 123.

Embodiment 1, in order to solve the pin connectivity problem of above-mentioned NFC chip and SIM card, in specific implementation, inventor considers and need improve the SIM card Kato of mobile terminal (as Iphone5), as shown in Figure 2, the external device of mobile terminal in the present embodiment, comprising: can carry the SIM card 21 of mobile terminal and can insert SIM card Kato 22, NFC chip 23 and the NFC antenna 24 of this mobile terminal SIM card screens; Wherein, SIM card Kato 22 leads to the C1 pin 211 of mobile terminal SIM card 21, C5 pin 212 and C6 pin 213 outer wall of SIM card Kato 22, and form corresponding 3 inner contact and be respectively 221,222,223, it is the corresponding inner contact 221 of C1 pin 211, the corresponding inner contact 222 of C5 pin 212, the corresponding inner contact 223 of C6 pin 213; C1 pin 211, C5 pin 212 and C6 pin 213 are connected with NFC chip 23 by corresponding inner contact, and NFC antenna 24 is connected with NFC chip 23.

Embodiment 2, for the ease of NFC chip, be connected with the pin of SIM card, shown in Figure 3, the present embodiment is optimized on the basis of embodiment 1, comprising: the SIM card 31 of mobile terminal can be carried and SIM card Kato 32, NFC chip 33 and the NFC antenna 34 of this mobile terminal SIM card screens can be inserted; Wherein, NFC chip 33 and NFC antenna 34 are integrated on the shell 35 matching with mobile terminal, are also provided with 3 external contact that are connected with NFC chip 33 on shell 35, are respectively 351,352,353.SIM card Kato 32 leads to the C1 pin 311 of mobile terminal SIM card 31, C5 pin 312 and C6 pin 313 outer wall of SIM card Kato 32, and form corresponding 3 inner contact and be respectively 321,322,323, it is the corresponding inner contact 321 of C1 pin 311, the corresponding inner contact 322 of C5 pin 312, the corresponding inner contact 323 of C6 pin 313.Because shell 35 and mobile terminal match, be designed in the present embodiment 3 external contact corresponding with 3 inner contact positions, after mobile terminal and shell 5 clampings, external contact is connected with corresponding inner contact respectively, be that external contact 351 is connected with inner contact 321 contacts, external contact 352 is connected with inner contact 322 contacts, and external contact 353 is connected with inner contact 323 contacts.In concrete technology, shell 5 can comprise: flexible PCB plate 354 and medium shell 355.Wherein, the upper and lower surface of flexible PCB plate 354 is provided with copper paving area 356,3 described external contact are connected with NFC chip 33 with printing copper cash or the FPC line of NFC antenna 34 by copper paving area 356, the copper paving area of flexible PCB plate 354 356 can also be etched to NFC antenna 34, can strengthen like this signal strength signal intensity and can save device again.Finally flexible PCB plate 354 is compressed in the middle of medium shell 355.Utilize shell 35 (as mobile phone protecting case) and the improved SIM card Kato 32 of the present embodiment, the mobile terminal that can make not have NFC function is realized the function of NFC-SWP technical scheme.

Here description of the present utility model and application are all illustrative and schematic, are not to want by scope restriction of the present utility model in the above-described embodiments.Here the distortion of disclosed embodiment and change is completely possible, and for those those of ordinary skill in the art, the various parts of the replacement of embodiment and equivalence are all known.Those skilled in the art are also noted that, in the situation that not departing from spirit of the present utility model or substantive characteristics, the utility model can be with other form, structure, layout, ratio, and realize with other assembly, material and parts, and in the situation that not departing from the utility model scope and spirit, can carry out other distortion and change to disclosed embodiment here.

Claims (4)

1. an external device for mobile terminal, is characterized in that, comprising: can carry the SIM card of mobile terminal and can insert SIM card Kato, NFC chip and the NFC antenna of the screens of described mobile terminal SIM card;

Wherein, described SIM card Kato leads to the outer wall of described SIM card Kato by the C1 pin of mobile terminal SIM card, C5 pin and C6 pin, and forms corresponding 3 inner contact; Described C1 pin, C5 pin and C6 pin are connected with NFC chip by corresponding inner contact; Described C6 pin is high-voltage signal pin, and C1 pin is supply voltage pin, and C5 pin is grounding pin;

Wherein, NFC antenna is connected with NFC chip.

2. the external device of mobile terminal as claimed in claim 1, is characterized in that, described NFC chip and NFC antenna are integrated on the shell matching with described mobile terminal, is also provided with 3 external contact that are connected with NFC chip on described shell;

Described C1 pin, C5 pin and C6 pin are connected with NFC chip by corresponding 3 inner contact, specifically: 3 described external contact are corresponding with 3 inner contact positions, after described mobile terminal and shell clamping, described external contact is connected with corresponding inner contact respectively.

3. the external device of mobile terminal as claimed in claim 2, is characterized in that, described shell comprises: flexible PCB plate and medium shell;

Wherein, the upper and lower surface of flexible PCB plate is provided with copper paving area, and 3 described external contact are connected with NFC chip with the printing copper cash of NFC antenna by described copper paving area;

Described flexible PCB plate is compressed in the middle of described medium shell.

4. the external device of mobile terminal as claimed in claim 3, is characterized in that, the copper paving area of described flexible PCB plate is etched to described NFC antenna.