Protective case for smart device, method for using the protective case for smart device, projection system, and projection method applied to the projection system

Abstract

A protective case for a smart device and a method for using the same are provided. The protective case for a smart device includes a housing, a reinforcing sheet, an RFID coil, multiple RFID chips, and multiple switch elements. The housing has an inner surface on which a mounting groove is formed, an outer surface on which a positioning groove is formed, the positioning groove facing the mounting groove, the reinforcing sheet mounted within the mounting groove, the RFID coil fixedly attached to the reinforcing sheet, the multiple RFID chips mounted within the mounting groove and electrically connected to the RFID coil, the multiple RFID chips mounted in parallel, and the multiple switch elements mounted within the positioning groove, each connected in series to a circuit to which the corresponding RFID chip and RFID coil are connected. This allows the flexible RFID coil to be easily positioned and mounted within the mounting groove, and the reinforcing sheet improves the strength of the housing at the locations where the mounting groove and positioning groove are formed, allowing the housing to be made thinner.

Description

[Technical Field]

[0001] The present invention relates to the technical field of protective cases for smart terminals, and more particularly to a protective case for smart terminals and a method for using the protective case for smart terminals. [Background technology]

[0002] As smart devices, such as smartphones, become increasingly smart and the number of functions on them increases, the operation methods of smartphones also become more complex and diverse. Smartphones are equipped with touch panels, and their main function is to realize human-computer interaction through virtual switch elements on the touch panel. Smartphones are also equipped with mechanical switch elements to assist users in directly triggering certain functions, such as making an emergency call, transmitting information, or launching application software.

[0003] A smartphone is equipped with mechanical switch elements, but the number of mechanical switch elements installed in a smartphone is generally two to three. In order to increase the number of mechanical switch elements that can quickly trigger a specific program or application on the smartphone, a mechanical switch element may be provided on the protective cover of the smartphone. The mechanical switch element is connected in series with the RFID chip and RFID coil on the protective cover to form a circuit, and after being triggered, the mechanical switch element can generate an electronic tag that can be sensed and read by the NFC module in the smartphone.

[0004] However, providing a mechanical switch element, RFID chip, and RFID coil on a smartphone protective cover complicates the structure of the protective cover while increasing the overall size of the protective cover, so a solution is needed. Summary of the Invention [Problem to be solved by the invention]

[0005] SUMMARY OF THE INVENTION The main object of the present invention is to provide a protective case for a smart terminal, which solves the problems that the conventional protective cases for smart terminals are too large in size and have complicated structures. [Means for solving the problem]

[0006] In order to achieve the above object, the present invention provides a protective case for a smart terminal, comprising a housing, a reinforcing sheet, an RFID coil, a plurality of RFID chips, and a plurality of switch elements, wherein an installation groove is provided on the inner surface of the housing, a positioning groove is provided on the outer surface of the housing, the positioning groove is provided opposite the installation groove, the reinforcing sheet is provided within the installation groove, the RFID coil is attached so as to be fixed to the reinforcing sheet, the plurality of RFID chips are installed within the installation groove and are electrically connected to the RFID coil, the plurality of RFID chips are arranged so as to be connected in parallel, and the plurality of switch elements are installed within the positioning groove, and the plurality of switch elements are each connected in series to a circuit to which a corresponding RFID chip and RFID coil are connected.

[0007] In some embodiments of the present invention, the housing includes a back plate and side plates extending in the same direction from the edge of the back plate, the back plate and the side plates are surrounded to form a mounting cavity for accommodating a smart terminal, the mounting groove is recessed in a surface of the side plate adjacent to the mounting cavity, and the positioning groove is provided in a surface of the side plate opposite the mounting cavity.

[0008] In some embodiments of the present invention, the back plate has a first area facing the NFC sensing area of ​​the smart terminal and a second area facing the wireless charging sensing area of ​​the smart terminal, the first area and the second area are spaced apart, the mounting groove is adjacent to the first area and spaced apart from the second area, a part of the RFID coil is located in the first area, and another part of the RFID coil is located in the mounting groove.

[0009] In some embodiments of the present invention, the frequency of the RFID chip is between 10 MHz and 15 MHz.

[0010] In some embodiments of the present invention, the RFID coil and the reinforcing sheet are adhesively fixed together by a double-sided adhesive.

[0011] In some embodiments of the present invention, the RFID coil is provided on a surface of the reinforcing sheet facing the bottom of the mounting groove, the multiple RFID chips are all provided on a surface of the RFID coil facing the bottom of the mounting groove, and the multiple RFID chips are all sealed by a sealing film.

[0012] In some embodiments of the present invention, a plurality of recesses are formed in the bottom of the mounting groove, and each recess is provided for accommodating the RFID chip.

[0013] In some embodiments of the present invention, the positioning groove is arranged to communicate with the mounting groove, the switch element includes a press-type button and a keycap, the press-type button is connected in series with the RFID coil and the corresponding RFID chip to form a circuit, the press-type button is arranged at a position where the RFID coil and the positioning groove face each other, and the keycap is fitted into the positioning groove and can reciprocate along the positioning groove so as to press or release the press-type button.

[0014] In some embodiments of the present invention, the depressible button is a metal dome button.

[0015] In some embodiments of the present invention, the RFID chip is disposed on a surface of the RFID coil facing the positioning groove, and the protective case of the smart terminal further includes a polyester film, which is disposed to cover the reinforcing sheet, the RFID coil, the plurality of RFID chips, and the press-type button.

[0016] In some embodiments of the present invention, the protective case of the smart terminal further includes a PET sheet, the PET sheet having a first hole formed therethrough corresponding to the RFID chip, and a second hole formed therethrough corresponding to the press-type button, one side of the PET sheet abutting against the polyester film, and the other side of the PET sheet being adhesively fixed to the RFID coil by double-sided tape.

[0017] In some embodiments of the present invention, the switch element is a self-resetting knob switch, or the switch element is an electronic switch, and the protective case of the smart terminal further includes a power supply module or a power connector, and the electronic switch is electrically connected to the power supply module or the power connector.

[0018] In some embodiments of the present invention, the protective case of the smart terminal further includes a decorative plate, which is arranged on the opposite side of the reinforcing sheet from the positioning groove, and which is arranged to cover the opening of the mounting groove.

[0019] The present invention further provides a method for using a protective case for a smart terminal, which is the above-mentioned protective case for a smart terminal, and the method for using the protective case for a smart terminal includes: step S10: placing the smart terminal on a housing and arranging the NFC sensing area of ​​the smart terminal facing the RFID coil; and step S20: triggering one of the multiple switch elements to conduct a circuit in which the triggered switch element is located, thereby generating an electronic tag that can be sensed and read by the NFC module of the smart terminal.

[0020] In some embodiments of the present invention, the frequency of the RFID chip is 10 MHz to 15 MHz, and the method for using the protective case for the smart terminal further includes step S30: simultaneously triggering two or more switch elements among the plurality of switch elements so as to simultaneously conduct circuits in which the triggered two or more switch elements are located, thereby generating an electronic tag that cannot be detected by the NFC module of the smart terminal. [Effects of the Invention]

[0021] In the smart device protective case of the present invention, a reinforcing sheet is fixedly mounted within the mounting groove, an RFID coil is attached to the reinforcing sheet, multiple RFID chips are connected in parallel and electrically connected to the RFID coil, and multiple switch elements are mounted within the positioning grooves and connected in series to the circuits to which the corresponding RFID chips and RFID coils are connected, thereby making it possible to easily position and mount the flexible RFID coil within the mounting groove, and the reinforcing sheet can improve the strength of the housing at the locations where the mounting grooves and positioning grooves are provided, thereby allowing the housing to be made thinner. [Brief explanation of the drawings]

[0022] In order to more clearly show the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings that need to be used in the description of the embodiments, it should be noted that the drawings in the following description are merely some embodiments of the present invention, and it is obvious to those skilled in the art that other drawings can be obtained from these drawings without creative work. [Figure 1] 1 is a schematic diagram of the structure of one embodiment of a protective case for a smart terminal of the present invention; [Figure 2] FIG. 2 is a schematic diagram of the structure of the case in FIG. 1. [Figure 3] FIG. 3 is an enlarged schematic view of a portion A in FIG. 2. [Figure 4] FIG. 2 is a cross-sectional view of the housing in FIG. [Figure 5] FIG. 5 is an enlarged schematic view of a portion B in FIG. [Figure 6] 1 is a schematic diagram of an embodiment of an RFID coil, a plurality of RFID chips, and a plurality of switch elements in a protective case of a smart terminal of the present invention; [Figure 7] 1 is a schematic diagram of another embodiment of an RFID coil, a plurality of RFID chips, and a plurality of switch elements in a protective case of a smart terminal of the present invention; [Figure 8] FIG. 2 is an exploded view of the reinforcing sheet, RFID coil, RFID chip, switch element, sealing film, polyester film, and PET sheet of the protective case for the smart terminal of the present invention. [Figure 9] 2 is a schematic diagram of the structure of the decorative plate of the protective case of the smart terminal of the present invention; [Figure 10] FIG. 2 is a cross-sectional view of a protective case for the smart terminal in FIG. [Figure 11] FIG. 11 is an enlarged schematic view of a portion C in FIG. [Figure 12] 2 is a flowchart of one embodiment of a method for using a protective case for a smart terminal according to the present invention. [Figure 13]10 is a flowchart of another embodiment of a method for using a protective case for a smart terminal according to the present invention. The realization of the objects, functional features and advantages of the present invention will be described with reference to the embodiments and with reference to the drawings. DETAILED DESCRIPTION OF THE INVENTION

[0023] The following clearly and completely describes the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. It should be noted that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative labor belong to the protection scope of the present invention.

[0024] As shown in Figures 1 to 11, the present invention provides a protective case 100 for a smart device. The protective case 100 for a smart device is applicable to electronic devices equipped with an NFC (Near Field Communication) function, such as mobile phones and tablets. The protective case 100 for a smart device includes a housing 10, a reinforcing sheet 20, an RFID (Radio Frequency Identification) coil 30, two or more RFID chips 40, and two or more switch elements 50. The reinforcing sheet 20, the RFID coil 30, the two or more RFID chips 40, and the two or more switch elements 50 are all provided in the housing 10.

[0025] The housing 10 may have a variety of shapes, including a flat plate-like shape, a U-shaped shape, or a basin-like shape with higher peripheries and a lower center, but the shape of the housing 10 is not specifically limited herein. The housing 10 may be made of a variety of materials. The housing 10 may be made of a flexible material, for example, rubber, silicone, or flexible plastic. Alternatively, the housing 10 may be made of a rigid material, for example, hard plastic. Alternatively, the housing 10 may be made of a composite material, a detailed description of which will be omitted here.

[0026] The housing 10 has an inner surface and an outer surface. Here, the inner surface of the housing 10 is the surface of the housing 10 adjacent to the smart terminal, and the outer surface of the housing 10 is the surface of the housing 10 away from the smart terminal. A mounting groove 10a is provided on the inner surface of the housing 10, and the mounting groove 10a may be elongated, circular, rectangular, or other shapes. A positioning groove 10b is provided on the outer surface of the housing 10, and the positioning groove 10b is provided opposite the mounting groove 10a. The positioning groove 10b may be elongated, circular, rectangular, or other shapes. The positioning groove 10b may be provided to communicate with the mounting groove 10a or may not be provided to communicate with it. The number of positioning grooves 10b may be one or more. When there is one positioning groove 10b, the positioning groove 10b is provided to correspond to multiple switch elements 50. When there are multiple positioning grooves 10b, the multiple positioning grooves 10b are provided to correspond to multiple switch elements 50 in a one-to-one relationship.

[0027] The shape of the reinforcing sheet 20 is diverse, and may be elongated, circular, rectangular, or other shapes. The shape of the reinforcing sheet 20 typically conforms to the shape of the mounting groove 10a so that the reinforcing sheet 20 is mounted within the mounting groove 10a to cover the opening of the mounting groove 10a. The reinforcing sheet 20 may be formed from a metal material, a metal oxide, a composite material, or other material, and is preferably formed from a metal material (e.g., aluminum metal, copper metal, stainless steel, etc.). Metal materials have the advantages of high strength and good bending resistance, which ensure the support performance and bending resistance of the reinforcing sheet 20.

[0028] The RFID coil 30, also known as a radio frequency antenna, mainly functions to transmit energy and information. The RFID coil 30 is fixedly attached to the surface of the reinforcing sheet 20. That is, the RFID coil 30 may be entirely disposed within the mounting groove 10a, or a portion of the RFID coil 30 may be disposed within the mounting groove 10a and the other portion may be disposed on the inner surface, outer surface, or interior of the housing 10. Note that when the other portion of the RFID coil 30 is located outside the mounting groove 10a, the portion of the RFID coil 30 located outside the mounting groove 10a is preferably disposed inside the housing 10. This prevents the RFID coil 30 from being exposed to the outside.

[0029] Each of the multiple RFID chips 40 is electrically connected to the RFID coil 30, and the multiple RFID chips 40 are arranged so as to be connected in parallel. The multiple RFID chips 40 and the RFID coil 30 are electrically connected via conductors, or the multiple RFID chips 40 are integrated into the RFID coil 30. The multiple RFID chips 40 are arranged in the mounting groove 10a. The multiple RFID chips 40 may be fixed to the groove wall of the mounting groove 10a, or the multiple RFID chips 40 may be fixed to the reinforcing sheet 20, or the multiple RFID chips 40 may be arranged in the RFID coil 30. Here, the manner of fixing is not limited, and it is sufficient that the multiple RFID chips 40 are fixed in the mounting groove 10a.

[0030] The multiple switch elements 50 are elements that control the conduction or interruption of an electric circuit. The switch elements 50 may be mechanical switches, electronic switches, capacitive switches, inductive switches, etc., and the type of switch elements 50 is not particularly limited. The multiple switch elements 50 are attached to the positioning grooves 10b. The multiple switch elements 50 are provided in one-to-one correspondence with the multiple RFID chips 40, that is, each switch element 50 is connected in series to the circuit in which the corresponding RFID chip 40 and RFID coil 30 are connected.

[0031] That is, each switch element 50 is connected in series to form a circuit with the corresponding RFID chip 40 and RFID coil 30. A plurality of switch elements 50 form a plurality of circuits with a plurality of RFID chips 40 and RFID coils 30, and one electronic tag can be generated by the conduction of each circuit, and the electronic tag generated by each circuit can be sensed and read by an NFC (Near Field Communication) module of the smart terminal.

[0032] When the smart terminal is attached to the smart terminal protective case 100, the NFC sensitive area of ​​the smart terminal faces the RFID coil 30 of the housing 10. When the smart terminal starts an NFC program, the NFC module of the smart terminal begins scanning for electronic tags. When one of the multiple switch elements 50 becomes conductive, the circuit formed by the conductive switch element 50, the corresponding RFID chip 40, and the RFID coil 30 generates an electronic tag. The NFC module of the smart terminal scans and reads the electronic tag. The controller of the smart terminal then determines whether to execute the next operation (e.g., launch an app, close the app, pause the app, or turn off the smart terminal), i.e., whether the electronic tag is a control command for the smart terminal. If the answer is YES, the corresponding operation is executed; if NO, no response is made. This allows the smart terminal protective case 100 to send quick commands to the smart terminal, allowing the user to easily operate the smart terminal.

[0033] The multiple switch elements 50 in the smart device protective case 100 may be configured to set quick commands according to user preferences. The following description will be given using a smart device as an example. When the smartphone's NFC program is launched, the smartphone's NFC module begins scanning for electronic tags. When a first switch element of the multiple switch elements 50 is conductive, the conductive circuit generates a first electronic tag, which may be a quick command for turning the smartphone's browser on or off. When a second switch element of the multiple switch elements 50 is conductive, the conductive circuit generates a second electronic tag, which may be a quick command for receiving or disconnecting a call on the smartphone.

[0034] When a third switch element of the plurality of switch elements 50 is conductive, the conductive circuit generates a third electronic tag, which may be a quick command to turn on the smartphone camera and press the shutter. When a fourth switch element of the plurality of switch elements 50 is conductive, the conductive circuit generates a fourth electronic tag, which may be a quick command to launch a smartphone game app. When a fifth switch element of the plurality of switch elements 50 is conductive, the conductive circuit generates a fifth electronic tag, which may be a quick command to pop up a smartphone charge reminder page. When a sixth switch element of the plurality of switch elements 50 is conductive, the conductive circuit generates a sixth electronic tag, which may switch to a specific instant communication software application on the smartphone. The smartphone quick commands corresponding to each electronic tag in the smart terminal protective case 100 may be customized according to personal preferences, and a detailed description thereof will be omitted here.

[0035] The smart device protective case 100 must be connected to the smart device before use to perform custom definitions for the electronic tags generated when the circuits containing the multiple switch elements 50 are conductive. To perform custom definitions for the electronic tags generated when the circuits containing the multiple switch elements 50 are conductive, the multiple switch elements 50 are sequentially triggered to turn on the corresponding circuits, and the NFC module of the smart device sequentially senses and reads the corresponding electronic tags, allowing the smart device to perform custom definitions for the electronic tags. In this way, each electronic tag generates a quick command for the smart device to perform a specific operation.

[0036] In the smart device protective case 100 according to the present invention, the reinforcing sheet 20 is fixedly attached within the mounting groove 10a, the RFID coil 30 is attached to the reinforcing sheet 20, a plurality of RFID chips are connected in parallel and are electrically connected to the RFID coil, and a plurality of switch elements 50 are attached within the positioning groove and are respectively connected in series to the circuits to which the corresponding RFID chips 40 and RFID coil 30 are connected. This allows the flexible RFID coil 30 to be easily positioned and attached within the mounting groove 10a, and the reinforcing sheet 20 improves the strength of the portions of the housing 10 where the mounting groove 10a and positioning groove 10b are provided, allowing the thickness of the housing 10 to be made thinner.

[0037] 2 to 5, in some embodiments of the present invention, a housing 10 includes a back panel 11 and side panels 12 extending in the same direction from the edge of the back panel 11. The side panels 12 and the back panel 11 are surrounded to form a mounting cavity 10c for accommodating a smart terminal. A mounting groove 10a is recessed in the surface of the side panel 12 adjacent to the mounting cavity 10c, and a positioning groove 10b is recessed in the surface of the side panel 12 opposite the mounting cavity 10c. This allows the smart terminal to be quickly and easily positioned and mounted on the housing 10, and also enables the position where the RFID coil 30 of the housing 10 is provided to face the NFC sensing area of ​​the smart terminal.

[0038] The thickness of the side plate 12 is usually the same as the thickness of the back plate 11. Although the installation of the mounting grooves 10a and the positioning grooves 10b reduces the strength and transverse rupture strength of parts of the side plate 12, by installing the reinforcing sheet 20 in the mounting groove 10a, the strength and transverse rupture strength of the reinforcing sheet 20 itself are relatively high, and the reinforcing sheet 20 can improve the strength and transverse rupture strength of the side plate 12. As a result, the strength and transverse rupture strength of each part of the side plate 12 are equivalent, meaning that the installation of the reinforcing sheet 20 allows the thickness of the side plate 12 to be made thinner.

[0039] In addition, the side plate 12 is typically provided with a first through-hole corresponding to the keys on the side of the smart device, a second through-hole corresponding to the earphone hole on the side of the smart device, and a third through-hole corresponding to the charging hole on the side of the smart device, and the numbers of the first through-hole, second through-hole, and third through-hole may be set according to the corresponding smart device. The back plate 11 is provided with a shooting window corresponding to the camera of the smart device. The shape of the shooting window may be circular, rectangular, polygonal, etc.

[0040] As shown in FIGS. 4, 5, 10, and 11, the back panel 11 has a first region 11a facing the NFC sensing area of ​​the smart terminal and a second region 11b facing the wireless charging sensing area of ​​the smart terminal. The first region 11a and the second region 11b are spaced apart. The mounting groove 10a is adjacent to the first region 11a and spaced apart from the second region 11b. A portion of the RFID coil 30 is located in the first region 11a, and the other portion of the RFID coil 30 is located within the mounting groove 10a. This prevents the RFID coil 30 and the reinforcing sheet 20 made of a metal material from affecting wireless charging of the smart terminal and also prevents the RFID coil 30 and the reinforcing sheet 20 made of a metal material from affecting the wireless charging magnetic field.

[0041] As described above, in some embodiments of the present invention, the frequency of the RFID chip 40 is 10 MHz to 15 MHz, and preferably, the frequency of the RFID chip 40 is 13.56 MHz. Because the frequency of the RFID chip 40 is 13.56 MHz, the RFID chip 40 does not need to be powered by a power source during use. Furthermore, if two or more of the multiple switch elements 50 are simultaneously conductive, the energy emitted from the smart terminal and received by the RFID coil 30 remains unchanged. However, because the conduction of two or more circuits reduces the frequency of the RFID coil 30, the electronic tags generated by the RFID chips in the two or more conductive circuits cannot be detected by the NFC module of the smart terminal. Therefore, by selecting an RFID chip within the above frequency range, it is possible to selectively turn on one of multiple parallel-connected RFID chips.

[0042] In other words, in the above embodiment, by selecting an RFID chip 40 with a frequency within the range of 10 MHz to 15 MHz, there is no need to install a power supply or an external power supply in the protective case 100 of the smart terminal, so the thickness of the housing 10 can be further reduced; meanwhile, by selectively turning on one of multiple parallel-connected RFID chips, the problem of the smart terminal having to perform two or more operations simultaneously when a user presses two or more switch elements simultaneously, which affects the normal operation of the smart terminal, can be avoided.

[0043] In some embodiments of the present invention, the RFID coil 30 and the reinforcing sheet 20 are bonded and fixed using a double-sided adhesive. The double-sided adhesive has adhesive properties on both sides, making it easy to bond and fix the reinforcing sheet 20 and the RFID coil 30. Furthermore, because the double-sided adhesive has insulating properties, if the reinforcing sheet 20 is made of a metal material, the double-sided adhesive can insulate and connect the reinforcing sheet 20 and the RFID coil 30, preventing the reinforcing sheet 20 from affecting the operation of the RFID coil 30. Furthermore, by using a double-sided adhesive, the distance between the reinforcing sheet 20 and the RFID coil 30 can be adjusted according to actual conditions, thereby making maximum use of the space in the mounting groove 10a to ensure the mounting of the RFID chip 40, switch element 50, and other structures.

[0044] 8 and 11 , in some embodiments of the present invention, the RFID coil 30 is provided on the surface of the reinforcing sheet 20 facing the bottom of the mounting groove 10a. Multiple RFID chips 40 are each provided on the surface of the RFID coil 30 facing the bottom of the mounting groove 10a. Each of the multiple RFID chips 40 is sealed with a sealing film 60. This prevents the RFID chip 40 from being exposed to the outside through the opening of the mounting groove 10a. Meanwhile, the sealing film 60 completely covers the RFID chip 40, and because the sealing film 60 itself is relatively thin, it has almost no effect on the space occupied by the RFID chip 40 when covering the RFID chip. Therefore, the provision of the sealing film 60 avoids the problem of the RFID chip 40 coming into direct contact with the bottom of the mounting groove 10a and becoming worn.

[0045] 3, 5, and 11, in some embodiments of the present invention, a plurality of retraction recesses 10d are formed in the groove bottom of the mounting groove 10a. Each of the plurality of retraction recesses 10d is provided for retracting the RFID chip 40. The retraction recesses 10d and the RFID chips 40 may be provided in a one-to-one or one-to-multiple relationship. This avoids the problem of the plurality of RFID chips 40 coming into direct contact with the groove bottom of the mounting groove 10a and becoming worn.

[0046] Furthermore, by providing multiple retreat recesses 10d at the bottom of the mounting groove 10a, the thickness of the housing 10 at the location where the mounting groove 10a is provided is reduced, but since a reinforcing sheet is attached inside the mounting groove 10a, the strength of the reinforcing sheet 20 itself is relatively high, and the reinforcing sheet 20 has relatively high resistance to bending, the strength and resistance to bending can be ensured at the location where the mounting groove 10a and positioning groove 10b of the housing 10 are provided.

[0047] As shown in Figures 8 and 11, in some embodiments of the present invention, the positioning groove 10b is provided to communicate with the mounting groove 10a. Each switch element 50 includes a pressable button 51 and a keycap 52. Each pressable button 51 is connected in series with the RFID coil 30 and the corresponding RFID chip 40 to form a circuit. Each pressable button 51 is provided at a position where the RFID coil 30 and the positioning groove 10b face each other. Each keycap 52 is fitted into the positioning groove 10b and can reciprocate along the positioning groove 10b to press or release the corresponding pressable button 51. This allows the circuit including the corresponding pressable button 51, the corresponding RFID chip 40, and the RFID coil 30 to be connected or disconnected.

[0048] The push button 51 may be a soft rubber button, a film button, a metal dome button, or other types of buttons, but the description thereof will be omitted here. Preferably, the push button 51 is a metal dome button. Because the thickness of a metal dome button is relatively small, the overall thickness of the RFID coil 30 and the metal dome button can be formed to 0.3 mm or less, which allows the depth of the mounting groove 10a to be relatively reduced and the thickness of the housing 10 to be relatively thin. Furthermore, the metal dome button can automatically return to its original position when an external force is removed, making the switch element 50 easy to operate and suitable for use by special users such as the elderly.

[0049] 11 , in some embodiments of the present invention, the smart terminal protective case 100 further includes a polyester film 70. The polyester film 70 is arranged to cover the stiffening sheet 20, the RFID coil 30, the plurality of RFID chips 40, and the press-type button 51. This allows the polyester film 70 to provide a dustproof function, and at the same time, the polyester film 70 itself has relatively good moisture resistance, which prevents moisture from the external air from entering the mounting groove 10a through the positioning groove 10b and affecting the normal operation of the RFID coil 30, the RFID chip 40, and the press-type button 51.

[0050] Furthermore, because the thickness of the polyester film 70 is very thin, when the polyester film 70 covers the reinforcing sheet 20, RFID coil 30, RFID chip 40, and press-type button 51, the change in the overall thickness is not significant. Specifically, the overall thickness of the reinforcing sheet 20, RFID chip 40, RFID coil 30, and metal dome button covered by the polyester film 70 is 0.8 mm or less. In other words, the installation of the polyester film 70 does not cause an increase in the thickness of the housing 10.

[0051] 8 and 11, in some embodiments of the present invention, the protective case 100 for the smart terminal further includes a PET (polyethylene terephthalate) sheet 80. The PET sheet 80 has a first escape hole 80a formed therethrough corresponding to the RFID chip 40. The PET sheet 80 has a second escape hole 80b formed therethrough corresponding to the push-type button 51. One side of the PET sheet 80 abuts against the polyester film 70, and the other side of the PET sheet 80 is adhesively fixed to the RFID coil 30 with double-sided tape.

[0052] The first evacuation hole 80a in the PET sheet 80 is provided corresponding to one or more RFID chips 40, and the second evacuation hole 80b in the PET sheet 80 is provided corresponding to one or more push-type buttons 51. In other words, the push-type buttons 51 and the RFID chip 40 in the RFID coil 30 are sealed by the PET sheet 80. Because the PET sheet 80 has relatively good barrier properties against gas, water, oil, and unpleasant odors, the waterproof and dustproof effects can be further improved by using the PET sheet 80 in combination with the polyester film 70. Furthermore, because the PET sheet 80 has a certain thickness, a sufficient distance can be secured between the RFID chip 40 in the RFID coil 30 and the bottom of the mounting groove 10a.

[0053] However, the switch element 50 may be of another type. In some embodiments of the present invention, the switch element 50 is a self-resetting knob switch. The self-resetting knob switch includes a knob switch and a reset wheel. The reset wheel is rotatably attached to the housing 10. A reset torsion spring is further provided between the reset wheel and the housing 10. The reset wheel rotates the knob switch in conjunction with the knob switch when an external force is applied. When the knob switch rotates a predetermined angle and becomes conductive, the knob switch conducts with the corresponding RFID chip 40 and RFID coil 30 to generate an electronic tag. When the reset wheel is released, the reset wheel returns to its initial position due to the action of the reset torsion spring, and the knob switch also switches from a conductive state to a disconnected state.

[0054] It should be noted that the switch element 50 may be of another type. For example, the switch element 50 may be an electronic switch. The type of electronic switch includes all electronic components with a switching function, such as a MOS transistor, a triode vacuum tube, a relay, a solid-state relay, a photocoupler, and an analog switch. In this case, the smart device protective case 100 further includes a power supply module or a power connector. The electronic switch is electrically connected to the power supply module or the power connector. The electronic switch may be turned on or off by tapping, shaking, pressing, touching, or other methods.

[0055] 3 and 8, in some embodiments of the present invention, the mounting groove 10a is provided in an elongated shape, and two positioning posts 13 protrude from the bottom of the mounting groove 10a, and the two positioning posts 13 are arranged at a distance from each other in the longitudinal direction of the mounting groove 10a. The reinforcing sheet 20 is provided in an elongated shape, and positioning holes 20a are formed through the reinforcing sheet 20 at both ends in the longitudinal direction, and the two positioning holes 20a engage with each other so that the two positioning posts 13 can be inserted into them. This makes it possible to easily position and mount the reinforcing sheet 20 in the mounting groove 10a, and to easily install the reinforcing sheet 20 in the mounting groove 10a.

[0056] The side of the reinforcing sheet 20 facing the opening of the mounting groove 10a may be filled with a foam material and rubber. As shown in Figures 5 and 7, the side of the reinforcing sheet 20 facing the opening of the mounting groove 10a may be covered with a decorative plate 90 made of polycarbonate (PC). The decorative plate 90 may be adhesively fixed to the side panel 12, or may be fixedly connected to the side panel 12 by ultrasonic welding, or may be fixedly connected to the side panel 12 by other methods, but the description of these will be omitted here. The decorative plate 90 itself has high strength, so it can further reinforce the strength of the location of the mounting groove 10a of the housing 10.

[0057] 3 and 5, in some embodiments of the present invention, mounting holes 90a are provided on both longitudinal ends of the decorative plate 90. The two mounting holes 90a fit into two positioning posts 13. The decorative plate 90 and the reinforcing sheet 20 are fixed together with a double-sided adhesive. The decorative plate 90 is used to cover the mounting grooves 10a. This allows the decorative plate 90 to be easily positioned and attached to the side panels 12 of the housing 10, and the decorative plate 90 can be easily fixed and attached to the side panels 12.

[0058] 3, 5, and 9, a wiring notch 11c that communicates with the mounting groove 10a is provided in the back plate 11 at a position adjacent to the mounting groove 10a. A covering block 91 is provided on the side of the decorative plate 90 adjacent to the back plate 11. The covering block 91 is provided to fit into and cover the wiring notch 11c. This allows the RFID coil 30 to be hidden inside the housing 10, while the covering block 91 provides a foolproof function when assembling the decorative plate 90 and the side plate 12. Furthermore, the fitting of the covering block 91 into the wiring notch 11c allows the decorative plate 90 to be positioned within the mounting groove 10a in the longitudinal direction.

[0059] As shown in Figure 12, the present invention further provides a method for using the smart device protective case 100. The smart device protective case 100 is as described in each of the above-mentioned embodiments. The method for using the smart device protective case 100 includes the following steps:

[0060] Step S10: Place the smart terminal on the housing, and position the NFC sensing area of ​​the smart terminal facing the RFID coil.

[0061] Step S20: Trigger one of the multiple switch elements to make the circuit in which the triggered switch element is located conductive and generate an electronic tag that can be sensed and read by the NFC module of the smart terminal.

[0062] When the smart terminal is attached to the smart terminal protective case 100, the NFC sensitive area of ​​the smart terminal faces the RFID coil 30 of the housing 10. When the smart terminal starts an NFC program, the NFC module of the smart terminal begins scanning for electronic tags. When one of the multiple switch elements 50 becomes conductive, the circuit formed by the conductive switch element 50, the corresponding RFID chip 40, and the RFID coil 30 generates an electronic tag. The NFC module of the smart terminal scans and reads the electronic tag. The controller of the smart terminal then determines whether to execute the next operation (e.g., launch an app, close the app, pause the app, or turn off the smart terminal), i.e., whether the electronic tag is a control command for the smart terminal. If the answer is YES, the corresponding operation is executed; if NO, no response is made. This allows the smart terminal protective case 100 to send quick commands to the smart terminal, allowing the user to easily operate the smart terminal.

[0063] The multiple switch elements 50 in the smart device protective case 100 may be configured to set quick commands according to user preferences. The following description will be given using a smart device as an example. When the smartphone's NFC program is launched, the smartphone's NFC module begins scanning for electronic tags. When a first switch element of the multiple switch elements 50 is conductive, the conductive circuit generates a first electronic tag, which may be a quick command for turning the smartphone's browser on or off. When a second switch element of the multiple switch elements 50 is conductive, the conductive circuit generates a second electronic tag, which may be a quick command for receiving or disconnecting a call on the smartphone.

[0064] When a third switch element of the plurality of switch elements 50 is conductive, the conductive circuit generates a third electronic tag, which may be a quick command to turn on the smartphone camera and press the shutter. When a fourth switch element of the plurality of switch elements 50 is conductive, the conductive circuit generates a fourth electronic tag, which may be a quick command to launch a smartphone game app. When a fifth switch element of the plurality of switch elements 50 is conductive, the conductive circuit generates a fifth electronic tag, which may be a quick command to pop up a smartphone charge reminder page. When a sixth switch element of the plurality of switch elements 50 is conductive, the conductive circuit generates a sixth electronic tag, which may switch to a specific instant communication software application on the smartphone. The smartphone quick commands corresponding to each electronic tag in the smart terminal protective case 100 may be customized according to personal preferences, and a detailed description thereof will be omitted here.

[0065] The smart device protective case 100 must be connected to the smart device before use to perform custom definitions for the electronic tags generated when the circuits containing the multiple switch elements 50 are conductive. To perform custom definitions for the electronic tags generated when the circuits containing the multiple switch elements 50 are conductive, the multiple switch elements 50 are sequentially triggered to turn on the corresponding circuits, and the NFC module of the smart device sequentially senses and reads the corresponding electronic tags, allowing the smart device to perform custom definitions for the electronic tags. In this way, each electronic tag generates a quick command for the smart device to perform a specific operation.

[0066] The frequency of the RFID chip 40 is 10MHz to 15MHz. As shown in FIG. 13, the method for using the protective case 100 for the smart terminal further includes the following steps.

[0067] Step S30: Trigger two or more of the plurality of switch elements simultaneously, so as to simultaneously make the circuits in which the triggered two or more switch elements are located conductive, thereby generating an electronic tag that cannot be detected by the NFC module of the smart terminal.

[0068] The frequency of the RFID chip is 10 MHz to 15 MHz, and preferably, the frequency of the RFID chip 40 is 13.56 MHz. RFID chips 40 with this frequency do not require power supply during use. Furthermore, if two or more of the multiple switch elements 50 are simultaneously conductive, the energy emitted from the smart terminal and received by the RFID coil 30 remains unchanged. However, the conduction of two or more circuits reduces the frequency of the RFID coil 30, and therefore the electronic tags generated by the RFID chips in the two or more conductive circuits cannot be detected by the NFC module of the smart terminal. Therefore, by selecting an RFID chip within the above frequency range, it is possible to selectively turn on one of multiple parallel-connected RFID chips.

[0069] In other words, in the above embodiment, by selecting an RFID chip 40 with a frequency within the range of 10 MHz to 15 MHz, there is no need to install a power supply or an external power supply in the protective case 100 of the smart terminal, so the thickness of the housing 10 can be further reduced; meanwhile, by selectively turning on one of multiple parallel-connected RFID chips, the problem of the smart terminal having to perform two or more operations simultaneously when a user presses two or more switch elements simultaneously, which affects the normal operation of the smart terminal, can be avoided.

[0070] It should be noted that the above embodiments are merely for illustrating the technical solutions of the present invention, and are not limiting. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art will understand that the technical solutions described in the above embodiments can be modified or some of the technical features can be replaced with equivalents. Even if such modifications or replacements are made, the essence of the corresponding technical solutions will not deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. [Explanation of symbols]

[0071] 100 Protective cases for smart devices 10. Cabinet 10a Mounting groove 10b Positioning groove 10c Mounting Cavity 10d Retractable recess 11 Back plate 11a First Area 11b Second Region 11c Wiring notch 12 Side panel 13 Positioning pillar 20 Reinforcement sheet 20a Positioning hole 30 RFID coils 40 RFID chips 50 Switch element 51 Button / Pressure Button 52 keycaps 60 Sealing film 70 Polyester film 80 PET sheets 80a First evacuation hole 80b Second evacuation hole 90 Decorative Plate 90a Mounting hole 91 Covering Block

Claims

1. A protective case for a smart device, The RFID device includes a housing, a reinforcing sheet, an RFID coil, a plurality of RFID chips, and a plurality of switch elements, an attachment groove is provided on an inner surface of the housing, a positioning groove is provided on an outer surface of the housing, the positioning groove is provided opposite the attachment groove, The reinforcing sheet is provided in the mounting groove, the RFID coil is attached so as to be fixed to the reinforcing sheet, the plurality of RFID chips are mounted in the mounting grooves and electrically connected to the RFID coil, the plurality of RFID chips being connected in parallel; The protective case for a smart terminal is characterized in that the plurality of switch elements are mounted in the positioning groove, and the plurality of switch elements are each connected in series to a circuit to which a corresponding RFID chip and RFID coil are connected.

2. The housing includes a back plate and side plates extending in the same direction from edges of the back plate, the back panel and the side panel are arranged to define a mounting cavity for receiving a smart terminal; The mounting groove is recessed in a surface of the side plate adjacent to the mounting cavity, The protective case for a smart terminal according to claim 1 , wherein the positioning groove is provided on a surface of the side plate opposite to the mounting cavity.

3. The back plate has a first area facing an NFC sensing area of ​​the smart terminal and a second area facing a wireless charging sensing area of ​​the smart terminal; The first region and the second region are provided at an interval, the mounting groove is provided adjacent to the first region and spaced apart from the second region; a portion of the RFID coil is provided in the first region; The protective case for a smart terminal according to claim 2 , wherein the other part of the RFID coil is disposed within the mounting groove.

4. The protective case for a smart device according to claim 1, wherein the frequency of the RFID chip is 10 MHz to 15 MHz.

5. The protective case for a smart device according to claim 1 , wherein the RFID coil and the reinforcing sheet are bonded together with a double-sided adhesive.

6. the RFID coil is provided on a surface of the reinforcing sheet facing a groove bottom of the mounting groove, the plurality of RFID chips are all provided on a surface of the RFID coil facing a groove bottom of the mounting groove, The protective case for a smart device according to claim 1 , wherein the plurality of RFID chips are all sealed with a sealing film.

7. A plurality of recesses are formed in the bottom of the mounting groove, The protective case for a smart terminal according to claim 6, wherein the plurality of recesses are provided for accommodating the RFID chip.

8. The positioning groove is provided in communication with the mounting groove, The switch element includes a pressure-type button and a keycap; the push button is connected in series with the RFID coil and the corresponding RFID chip to form a circuit; the push button is provided at a position where the RFID coil and the positioning groove face each other; The protective case for a smart terminal according to claim 1 , wherein the key cap is fitted into the positioning groove and can reciprocate along the positioning groove to press or release the pressure-type button.

9. The protective case for a smart device according to claim 8, wherein the pressure-type button is a metal dome button.

10. the RFID chip is provided on a surface of the RFID coil facing the positioning groove, The protective case for the smart device further includes a polyester film; The protective case for a smart device according to claim 8 , wherein the polyester film is disposed to cover the reinforcing sheet, the RFID coil, the plurality of RFID chips, and the press-type button.

11. The protective case for the smart device further includes a PET sheet; the PET sheet has a first escape hole formed therethrough in correspondence with the RFID chip; the PET sheet has a second escape hole formed therethrough in correspondence with the push-type button; One side of the PET sheet is in contact with the polyester film, The protective case for a smart terminal according to claim 10, wherein the other side of the PET sheet is adhesively fixed to the RFID coil with double-sided tape.

12. The switch element is a self-resetting knob switch, or The protective case for a smart terminal according to claim 1, characterized in that the switching element is an electronic switch, the protective case for the smart terminal further includes a power supply module or a power connector, and the electronic switch is electrically connected to the power supply module or the power connector.

13. The protective case of the smart device further includes a decorative plate; the decorative plate is provided on the opposite side of the reinforcing sheet from the positioning groove, The protective case for a smart terminal according to claim 1 , wherein the decorative plate is provided to cover an opening of the mounting groove.

14. 14. A method of using a protective case for a smart terminal, the protective case for the smart terminal being the protective case for the smart terminal according to any one of claims 1 to 13, the method comprising: Step S10: placing the smart terminal on the housing, and arranging the NFC sensing area of ​​the smart terminal facing the RFID coil; Step S20: Triggering one of the plurality of switch elements to cause a circuit in which the triggered switch element is located to become conductive, thereby generating an electronic tag that can be sensed and read by the NFC module of the smart terminal.

15. The frequency of the RFID chip is 10 MHz to 15 MHz; The method of using the protective case for the smart device is as follows: The method for using the protective case for a smart terminal of claim 14 further comprises: step S30: simultaneously triggering two or more of the plurality of switch elements so as to simultaneously turn on circuits in which the triggered two or more switch elements are located, thereby generating an electronic tag that cannot be detected by the NFC module of the smart terminal.

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