NFC passive mobile phone shell with switch device

Abstract

The utility model relates to the technical field of passive mobile phone shells, and provides a near field communication (NFC) passive mobile phone shell with a switch device, which comprises a mobile phone shell body, a switch device and an NFC passive mobile phone shell, the NFC label is arranged in the mobile phone shell body; the switch device is arranged in the mobile phone shell body; the switching device is connected with a main controller of the NFC tag; the switching device is used for controlling the NFC connection between the NFC reader-writer and the NFC of the NFC tag; a non-intrusive switch input part is formed on the surface of the mobile phone shell body, and the switch input part is used for triggering the switch device. According to the embodiment of the invention, the sealing performance of the NFC chip in the NFC passive mobile phone shell can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of passive mobile phone cases, and in particular to a near field communication (NFC) passive mobile phone case with a switch device. Background Art

[0002] At present, there are some mobile phone cases with NFC passive functions on the market, which can be equipped with electronic devices such as display screens, sensors, LED lights, etc. to achieve many functions such as changing patterns, collecting data, and caller ID. This type of mobile phone case has no built-in battery, and is powered by the radio frequency energy radiated by the NFC interface of the mobile phone. It has many advantages such as simple structure, easy use, and plug-and-play.

[0003] However, all current products of this type have a common problem: it is not possible to conveniently control the closing and opening of the electronic functions of the mobile phone shell of the switch device. Most of these products do not have a switch. Once installed on a mobile phone, they will start working as long as the NFC function of the mobile phone is turned on. This leads to a significant increase in mobile phone power consumption, a significant shortening of mobile phone battery life, and a sharp increase in mobile phone heating, among other consequences. In addition, the mobile phone NFC interface is occupied by the mobile phone shell all the time, and the NFC functions of the mobile phone itself, such as access control cards and bus cards, are all invalid. These problems seriously affect the user experience. A small number of products are equipped with a toggle switch, which is directly connected to the NFC antenna of the mobile phone shell, and the purpose of switching the mobile phone shell function is achieved by directly disconnecting the NFC antenna. Although these products can solve most of the above problems, they have brought new problems. Since the toggle switch needs to open an opening on the mobile phone shell, it destroys the sealing of the mobile phone shell, making it vulnerable to splashing water, dust, and debris, and is more easily damaged. Therefore, the current mobile phone shell products with NFC passive functions do not achieve a good user experience. Utility Model Content

[0004] The purpose of the embodiments of this specification is to provide an NFC passive mobile phone case with a switch device to improve the sealing performance of an NFC chip in the NFC passive mobile phone case.

[0005] To achieve the above objectives, on the one hand, the embodiments of this specification provide an NFC passive mobile phone case with a switch device, including:

[0006] Mobile phone case body;

[0007] An NFC tag disposed in the mobile phone case body;

[0008] A switch device is arranged in the mobile phone case body; the switch device is connected to the main controller of the NFC tag; the switch device is used to control the NFC connection between the NFC reader and the NFC tag; a non-invasive switch input part is formed on the surface of the mobile phone case body, and the switch input part is used to trigger the switch device.

[0009] In the NFC passive mobile phone case of the embodiment of this specification, the switch device includes a push-type micro switch; the outer surface area on the mobile phone case body corresponding to the position of the push-type micro switch forms an elastically deformable press-sensing area as a switch input part.

[0010] In the NFC passive mobile phone case of the embodiment of the present specification, the switch device includes a touch chip and a touch pad, the touch chip is connected to the touch pad; the touch pad is used to sense the user's touch operation; the touch chip is used to output a switch state signal corresponding to the operation to the main controller; the touch pad is attached to the inner surface of the mobile phone case body, and the outer surface area of ​​the mobile phone case body corresponding to the position of the touch pad forms a touch sensing area as a switch input part.

[0011] In the NFC passive mobile phone case of the embodiment of the present specification, the switch device includes a Bluetooth chip and a Bluetooth antenna, and the Bluetooth chip is connected to the Bluetooth antenna; the Bluetooth antenna is used to receive a tag activation signal sent by the NFC reader; the Bluetooth chip is used to output a switch state signal corresponding to the tag activation signal to the main controller; the Bluetooth antenna is laid on the inner surface of the mobile phone case body, and the outer surface area of ​​the mobile phone case body corresponding to the position of the Bluetooth antenna forms a Bluetooth sensing area serving as a switch input part.

[0012] In the NFC passive mobile phone case of the embodiment of this specification, the main controller is used to actively disconnect the NFC connection between the NFC tag that has completed the work and the NFC reader.

[0013] In the NFC passive mobile phone case of the embodiment of this specification, the main controller is used to disconnect the NFC connection between the NFC tag and the NFC reader according to the closed state signal output by the switch device.

[0014] In the NFC passive mobile phone case of the embodiment of this specification, the first end of the push-type micro switch is connected to the IO port of the main controller; the second end of the push-type micro switch is grounded; the first end of the push-type micro switch is connected to the power supply end through a pull-up resistor.

[0015] In the NFC passive mobile phone case of the embodiment of this specification, the signal input end of the touch chip is connected to the output end of the touch panel; the output end of the touch chip is connected to the IO port of the main controller; the power input end of the touch chip is connected to the power end; and the ground end of the touch chip is grounded.

[0016] In the NFC passive mobile phone case of the embodiment of this specification, the signal input end of the Bluetooth chip is connected to the output end of the Bluetooth antenna; the output end of the Bluetooth chip is connected to the IO port of the main controller; the power input end of the Bluetooth chip is connected to the power end; and the ground end of the Bluetooth chip is grounded.

[0017] In the NFC passive mobile phone case of the embodiment of this specification, the thickness of the pressure sensing area is smaller than the main body thickness of the mobile phone case body.

[0018] In the NFC passive mobile phone case of the embodiment of this specification, the thickness of the pressure sensing area is not more than 0.5 mm.

[0019] In the NFC passive mobile phone case of the embodiment of this specification, the thickness of the touch sensing area is smaller than the main body thickness of the mobile phone case body.

[0020] In the NFC passive mobile phone case of the embodiment of this specification, the thickness of the touch sensing area is not greater than 0.2 mm.

[0021] It can be seen from the technical solutions provided in the above embodiments of this specification that, in the embodiments of this specification, since the switch device is arranged in the mobile phone case body, and the switch input part formed on the surface of the mobile phone case body is non-invasive, that is, in the embodiments of this specification, no invasive and destructive operations such as opening holes and grooves will be performed on the mobile phone case body to install the switch input part, thereby not destroying the sealing of the part corresponding to the position of the NFC chip on the mobile phone case body, thereby improving the sealing of the NFC chip in the NFC passive mobile phone case, which is beneficial to extend the service life of the NFC passive mobile phone case. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art description. Obviously, the drawings described below are only some embodiments recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. In the drawings:

[0023] Figure 1 The working principle diagram of the NFC passive mobile phone case in the prior art is shown;

[0024] Figure 2A schematic diagram of a signal transmission mechanism of an NFC reader / writer in the prior art is shown;

[0025] Figure 3 A schematic diagram of the structure of an NFC passive mobile phone case with a switch device in some embodiments of this specification is shown;

[0026] Figure 4 A circuit principle block diagram of an NFC passive mobile phone case with a switch device in some embodiments of this specification is shown;

[0027] Figure 5 A schematic diagram of the structure of a switch device in some embodiments of this specification is shown;

[0028] Figure 6 It shows a schematic diagram of the structure of the switch device in other embodiments of the present specification;

[0029] Figure 7 The schematic diagram of the structure of the switch device in other embodiments of the present specification is shown.

[0030] [Description of Reference Numerals]

[0031] 10. NFC reader / writer;

[0032] 20. NFC tag;

[0033] 201. NFC antenna;

[0034] 202, main load;

[0035] 203. Energy storage unit;

[0036] 204. NFC energy collection interface;

[0037] 205. NFC communication interface;

[0038] 206. Power supply circuit;

[0039] 207. Main controller;

[0040] 30. Mobile phone case body;

[0041] 40. Switchgear;

[0042] 501, push-type micro switch;

[0043] 502, pull-up resistor;

[0044] 503, switch output terminal;

[0045] 601, touch chip;

[0046] 602. Touchpad;

[0047] 603, touch output terminal;

[0048] 701, Bluetooth chip;

[0049] 702, Bluetooth antenna;

[0050] 703. Bluetooth output terminal. DETAILED DESCRIPTION

[0051] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this specification. For example, in the following description, forming a second component above a first component may include an embodiment in which the first component and the second component are formed in direct contact, and may also include an embodiment in which the first component and the second component are formed in non-direct contact (that is, additional components may be included between the first component and the second component), etc.

[0052] Moreover, for ease of description, some embodiments of this specification may use spatially relative terms such as "above", "below", "top", "below", etc. to describe the relationship between one element or component and another (or other) elements or components as shown in the drawings of the embodiments. It should be understood that in addition to the orientations described in the drawings, the spatially relative terms are also intended to include different orientations of the device in use or operation. For example, if the device in the drawings is turned over, the elements or components described as "below" or "beneath" other elements or components will then be positioned "above" or "on" the other elements or components.

[0053] Figure 1 The working principle of a typical NFC passive mobile phone case is shown. The NFC reader 10 integrated inside the mobile phone can use an NFC coil antenna to radiate high-frequency electromagnetic fields. The passive NFC tag 20 integrated inside the mobile phone case can also use a coil antenna to collect the energy radiated by the NFC reader 10. The NFC reader 10 and the NFC tag 20 can exchange data while transferring energy; that is, with the help of the electromagnetic field, the NFC reader 10 and the NFC tag 20 can simultaneously realize two-way data transmission and unidirectional energy transfer. The NFC reader 10 generally adopts low-frequency periodic detection to detect whether there are NFC tags 20 around, that is, the NFC reader 10 can periodically emit NFC device detection signals at a low frequency to detect whether there are NFC tags 20 around (such as Figure 2Only when there is an NFC tag 20 in the vicinity that responds to the detection signal of the NFC reader 10 and successfully shakes hands, the NFC reader 10 will establish an NFC connection with it, and will keep on transmitting signals continuously under the NFC connection (such as Figure 2 Therefore, the NFC reader / writer 10 is in a closed state most of the time, thereby achieving low power consumption.

[0054] In view of the poor usability and sealing performance of the existing NFC passive mobile phone case with a switch device, the embodiments of this specification provide a new NFC passive mobile phone case with a switch device to improve the sealing performance of the NFC chip in the NFC passive mobile phone case.

[0055] refer to Figure 3 As shown, in some embodiments of the present specification, the NFC passive mobile phone case with a switch device may include a mobile phone case body 30, an NFC tag 20 and a switch device 40. The NFC tag 20 and the switch device 40 are both arranged in the mobile phone case body 30, that is, the NFC tag 20 and the switch device 40 are embedded in the mobile phone case body 30 and are not exposed outside the mobile phone case body 30. Figure 4 As shown, the switch device 40 is connected to the main controller 207 of the NFC tag 20 (for example, the output end of the switch device 40 can be connected to the universal serial IO interface of the main controller 207 of the NFC tag 20); the switch device 40 is used to control the NFC connection between the NFC reader (i.e., the NFC reader integrated in the mobile phone) and the NFC tag 20; a non-invasive (i.e., the surface of the mobile phone shell body 30 is not damaged) switch input part is formed on the surface of the mobile phone shell body 30, and the switch input part is used to trigger the switch device 40. Since the switch device 40 is arranged in the mobile phone shell body 30, and the switch input part formed on the surface of the mobile phone shell body 30 is non-invasive, that is, in the embodiment of the present specification, no invasive and destructive operations such as opening a hole, grooving, and slits will be performed on the mobile phone shell body 30 for installing the switch input part, so that the sealing of the NFC tag 20 located in the mobile phone shell body 30 will not be damaged, thereby improving the sealing of the NFC chip in the NFC passive mobile phone shell, which is conducive to extending the service life of the NFC passive mobile phone shell.

[0056] also, Figure 3 The structures and positions of the NFC tag 20 and the switch device 40 shown in the figure are only for exemplary description. In actual implementation, the NFC tag 20 and the switch device 40 can be placed at any position in the mobile phone case body 30.

[0057] Please continue to refer to Figure 4As shown, in some embodiments of this specification, the NFC tag 20 may include: an NFC antenna 201, a main load 202, an energy storage unit 203, an NFC energy collection interface 204, an NFC communication interface 205, a power supply circuit 206 and a main controller 207. The NFC communication interface 205 is connected to the NFC antenna 201 and is responsible for NFC communication with the NFC reader integrated in the mobile phone. The NFC energy collection interface 204 is connected to the NFC communication interface 205 and is responsible for extracting and converting the radio frequency energy received by the NFC antenna 201 into direct current energy, and storing it inside the energy storage unit 203 connected thereto; wherein the energy storage unit 203 may be a capacitor. The energy storage unit 203 is connected to the power supply circuit 206 to convert the stored energy into a stable direct current voltage for the operation of the NFC tag 20. Among them, according to the function of the NFC passive mobile phone case, the main load 202 can be any device, for example, it can include but is not limited to: sensors (temperature and humidity, air pressure, infrared, optical, biometric, medical, sound, vibration, gas, magnetic field, etc.), LCD displays, OLED displays, LED light groups, EPD electronic paper, motors, solenoid valves, etc.

[0058] The main controller 207 is connected to the NFC communication interface 205, the NFC energy collection interface 204, the power supply circuit 206, the main load 202 and the switch device 40, and is responsible for the overall control of the entire NFC tag 20. Different from the existing NFC passive mobile phone case with a switch, the switch device 40 of the NFC passive mobile phone case in the embodiment of this specification is not responsible for the power on / off control of the NFC antenna 201, the main controller 207, etc., but only provides a switch state signal for the main controller 207; based on the switch state signal output by the switch device 40, the main controller 207 can control the NFC connection between the NFC reader and the NFC tag 20. Among them, the switch state signal can be divided into an on state signal and a off state signal; based on the on state signal output by the switch device 40, the main controller 207 can control the NFC reader to establish and maintain an NFC connection with the NFC tag 20, and at this time the main controller 207 can turn on the function of the NFC passive mobile phone case (such as data refresh, etc.); based on the off state signal output by the switch device 40, the main controller 207 can disconnect the NFC connection between the NFC reader and the NFC tag 20.

[0059] Specifically, when the NFC reader / writer transmits a detection signal, the NFC tag 20 obtains the radio frequency energy emitted by the NFC reader / writer and starts to work. If the switch device 40 does not output an open state signal, the main controller 207 will not respond to the NFC reader / writer (that is, the main controller 207 will not establish an NFC connection between the NFC tag 20 and the NFC reader / writer), so that the NFC reader / writer continues to maintain a periodic detection state due to the lack of a response signal. In this state, the power consumption of the NFC reader / writer is kept to a minimum, and all NFC functions of the NFC reader / writer itself (such as access control cards, bus cards, etc.) can work normally. On the contrary, if the switch device 40 outputs an open state signal, the main controller 207 controls the NFC tag 20 to respond to the detection signal through the NFC communication interface 205, and establishes an NFC connection between the NFC tag 20 and the NFC reader / writer, and the NFC tag 20 starts to work normally. After the NFC tag 20 starts to work normally, the switch device 40 can stop outputting the open state signal, and the NFC tag 20 can continue to maintain normal operation.

[0060] In some embodiments of this specification, the main controller 207 can be used to actively disconnect the NFC connection between the NFC tag 20 and the NFC reader after the NFC tag 20 has completed its work, that is, when the NFC tag 20 has completed its work, the main controller 207 can actively disconnect the NFC connection between the NFC tag 20 and the NFC reader; thereafter, the NFC reader returns to the periodic detection state. In this way, the NFC tag 20 can realize the function of automatically closing the NFC mobile phone case.

[0061] In other embodiments of the present specification, the main controller 207 can be used to disconnect the NFC connection between the NFC tag and the NFC reader according to the shutdown state signal output by the switch device. That is, when the switch device outputs the shutdown state signal, it means that the user wants to forcibly close the NFC mobile phone case (i.e., forcibly close the NFC tag 20); at this time, the main controller 207 can control the NFC communication interface 205 to no longer communicate with the NFC reader, that is, disconnect the NFC connection between the NFC tag and the NFC reader, and then the NFC reader returns to the periodic detection state. In this way, the user can actively close the NFC mobile phone case function.

[0062] In some embodiments of the present specification, the switch device is a push-type micro switch; since the push-type micro switch is a light touch switch, when using the push-type micro switch, the user only needs to lightly press the push-type micro switch to achieve switch control, without having to toggle the toggle switch hard like the existing NFC mobile phone case, which is easier for the user to operate and the user experience is better. In the case where the switch device is a push-type micro switch, the outer surface area corresponding to the position of the push-type micro switch on the mobile phone case body forms a press-sensing area that can be elastically deformed as a switch input part. When the user presses the outer surface area, the outer surface area is deformed inwardly, thereby squeezing the push-type micro switch located in the mobile phone case body, and then the push-type micro switch outputs a switch state signal; when the user releases (or releases) the pressure on the outer surface area, the outer surface area is elastically reset. In some embodiments of the present specification, the thickness of the press-sensing area can be less than the main body thickness of the mobile phone case body (that is, the thickness of the cover plate of the mobile phone case body). Thus, by reducing the thickness of the pressure sensing area, the pressure sensing area can be more easily deformed, thereby making it easier for the user to press the push-type micro switch. For example, the thickness of the pressure sensing area may be no greater than 0.5 mm (the thickness of the pressure sensing area may also be adjusted as needed according to actual needs).

[0063] For example, refer to Figure 5 As shown, in some embodiments of this specification, when the switch device is a push-type micro switch 501, the first end of the push-type micro switch 501 is connected to the IO port of the main controller through the switch output end 503; the second end of the push-type micro switch 501 is grounded; and the first end of the push-type micro switch 501 is also connected to the power supply end VCC through the pull-up resistor 502. The power supply end VCC can be Figure 4 The output terminal of the power supply circuit 206 is shown in (the content about the power supply terminal VCC below can be referred to this part, which will not be repeated below). When the push-type micro switch 501 is not pressed, the switch output terminal 503 outputs a high level to indicate that the push-type micro switch 501 is in the closed state; when the push-type micro switch 501 is pressed, the switch output terminal 503 outputs a low level to indicate that the push-type micro switch 501 is in the open state.

[0064] In other embodiments of the present specification, the switch device may be a touch chip and a touch pad, wherein the touch chip is connected to the touch pad; the touch pad is used to sense the user's touch operation (touch operation for the purpose of controlling the switch state); and the touch chip is used to output the switch state signal corresponding to the operation to the main controller. When in use, the user only needs to touch the touch pad to realize the switch control. In this way, there is no need to toggle the toggle switch with force like the existing NFC mobile phone case, which is easier for the user to operate and the user experience is better. Among them, the touch pad can be attached to the inner surface of the mobile phone case body, and the outer surface area corresponding to the position of the touch pad on the mobile phone case body forms a touch sensing area as the switch input part. When the user touches the touch sensing area, the touch pad can sense the user's touch on the touch sensing area through the mobile phone case. In some embodiments of the present specification, the thickness of the touch sensing area can be less than the main body thickness of the mobile phone case body; in this way, by reducing the thickness of the touch sensing area, the sensing distance between the user's finger and the touch pad can be reduced, so that the touch pad is more sensitive to the user's touch, thereby making the user's touch operation easier. For example, in some embodiments of the present specification, the thickness of the touch sensing area may be no greater than 0.2 mm (the thickness of the touch sensing area may also be adjusted as needed according to actual needs).

[0065] For example, refer to Figure 6 As shown, in some embodiments of the present specification, when the switch device is a touch chip 601 and a touch pad 602; the touch chip 601 can be a touch sensor, and the touch pad 602 can be a metal plate insulated from other circuits in the NFC tag, or an independent metal film insulated from other circuits on the circuit board of the NFC tag. The touch pad 602 can be attached to the inner surface of the mobile phone shell body, and the outer surface area corresponding to the position of the touch pad on the mobile phone shell body forms a touch sensing area as a switch input part. The signal input end of the touch chip 601 is connected to the output end of the touch pad 602; the output end of the touch chip 601 (i.e., the touch output end 603) is connected to the IO port of the main controller; the power input end of the touch chip 601 is connected to the power end VCC; the ground end of the touch chip 601 is grounded.

[0066] In some other embodiments of the present specification, the switch device can be a Bluetooth chip and a Bluetooth antenna, the Bluetooth chip is connected to the Bluetooth antenna; the Bluetooth antenna is used to receive the tag activation signal sent by the NFC reader; the Bluetooth chip is used to output the switch state signal corresponding to the tag activation signal to the main controller. The Bluetooth antenna is laid on the inner surface of the mobile phone case body, and the outer surface area of ​​the mobile phone case body corresponding to the position of the Bluetooth antenna forms a Bluetooth sensing area as a switch input part. When in use, the user can send and receive the switch state signal on the mobile phone client on the NFC reader side, and the switch state signal penetrates the Bluetooth sensing area, so that it can be received by the Bluetooth antenna; this is also convenient for user operation and the user experience is better.

[0067] For example, refer to Figure 7 As shown, in some embodiments of the present specification, when the switching device is a Bluetooth chip 701 and a Bluetooth antenna 702; the signal input end of the Bluetooth chip 701 is connected to the output end of the Bluetooth antenna 702; the output end of the Bluetooth chip 701 (i.e., the Bluetooth output end 703) is connected to the IO port of the main controller; the power input end of the Bluetooth chip 701 is connected to the power end VCC; and the ground end of the Bluetooth chip 701 is grounded.

[0068] It should also be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a device or apparatus including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such device or apparatus. In the absence of further restrictions, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the device or apparatus including the element.

[0069] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. An NFC passive mobile phone case with a switch device, characterized in that: include: Mobile phone case body; An NFC tag disposed in the mobile phone case body; A switch device disposed in the mobile phone case body; The switch device is connected to the main controller of the NFC tag; the switch device is used to control the NFC connection between the NFC reader and the NFC tag; a non-invasive switch input part is formed on the surface of the mobile phone case body, and the switch input part is used to trigger the switch device.

2. The NFC passive mobile phone case as claimed in claim 1, characterized in that: The switch device includes a push-type micro switch; an outer surface area on the mobile phone shell body corresponding to the position of the push-type micro switch forms an elastically deformable push sensing area as a switch input part.

3. The NFC passive mobile phone case as claimed in claim 1, characterized in that: The switch device includes a touch chip and a touchpad, the touch chip is connected to the touchpad; the touchpad is used to sense the user's touch operation; the touch chip is used to output a switch state signal corresponding to the operation to the main controller; the touchpad is attached to the inner surface of the mobile phone case body, and the outer surface area of ​​the mobile phone case body corresponding to the position of the touchpad forms a touch sensing area as a switch input part.

4. The NFC passive mobile phone case according to claim 1, characterized in that: The switch device includes a Bluetooth chip and a Bluetooth antenna, the Bluetooth chip is connected to the Bluetooth antenna; the Bluetooth antenna is used to receive a tag activation signal sent by the NFC reader; the Bluetooth chip is used to output a switch state signal corresponding to the tag activation signal to the main controller; the Bluetooth antenna is laid on the inner surface of the mobile phone case body, and the outer surface area of ​​the mobile phone case body corresponding to the position of the Bluetooth antenna forms a Bluetooth sensing area as a switch input part.

5. The NFC passive mobile phone case as claimed in claim 1, characterized in that: The main controller is used to actively disconnect the NFC connection between the NFC tag that has completed the work and the NFC reader.

6. The NFC passive mobile phone case as claimed in claim 1, characterized in that: The main controller is used to disconnect the NFC connection between the NFC tag and the NFC reader according to the closed state signal output by the switch device.

7. The NFC passive mobile phone case as claimed in claim 2, characterized in that: The first end of the push-type micro switch is connected to the IO port of the main controller; the second end of the push-type micro switch is grounded; and the first end of the push-type micro switch is connected to the power supply end through a pull-up resistor.

8. The NFC passive mobile phone case as claimed in claim 3, characterized in that: The signal input terminal of the touch chip is connected to the output terminal of the touch panel; the output terminal of the touch chip is connected to the IO port of the main controller; the power input terminal of the touch chip is connected to the power terminal; and the ground terminal of the touch chip is grounded.

9. The NFC passive mobile phone case as claimed in claim 4, characterized in that: The signal input end of the Bluetooth chip is connected to the output end of the Bluetooth antenna; the output end of the Bluetooth chip is connected to the IO port of the main controller; the power input end of the Bluetooth chip is connected to the power end; and the ground end of the Bluetooth chip is grounded.

10. The NFC passive mobile phone case as claimed in claim 2, characterized in that: The thickness of the pressure sensing area is smaller than the main body thickness of the mobile phone case body.

11. The NFC passive mobile phone case as claimed in claim 10, characterized in that: The thickness of the pressure sensing area is no greater than 0.5 mm.

12. The NFC passive mobile phone case as claimed in claim 3, characterized in that: The thickness of the touch sensing area is smaller than the main body thickness of the mobile phone case body.

13. The NFC passive mobile phone case as claimed in claim 12, characterized in that: The thickness of the touch sensing area is no greater than 0.2 mm.

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