Active NFC antenna structure of smart watch

Abstract

The utility model discloses an active NFC antenna structure of a smart watch, which comprises a module shell I and a module shell II, a circuit board is fixedly connected inside the module shell I, an antenna coil I is arranged at one end of the surface of the circuit board, an antenna coil II is arranged at the other end of the surface of the circuit board, one end of the antenna coil I is fixedly connected with a feeder, and the other end of the antenna coil II is fixedly connected with a power supply. One end of the outer side of the module shell II is fixedly connected with a pin; the first antenna coil and the second antenna coil of the intelligent watch are NFC signal transmitting and receiving cores, work based on the electromagnetic induction principle and can receive and radiate signals, a variable capacitor and an inductance adjustable element integrated on the circuit board can optimize antenna performance according to environmental changes, and a frame-shaped neodymium iron boron magnet achieves rapid installation and replacement of the antenna. The fixing rubber ring stabilizing module, the circuit board, the electromagnetic shielding layer and the magnetic shielding layer form a protection system, the moisture-proof layer prevents water vapor, the silica gel buffer layer buffers impact, and pins on two sides of the second module shell are connected with a watch mainboard and supply power to an antenna coil to ensure normal operation of the watch mainboard.

Description

TECHNICAL FIELD

[0001] The utility model relates to active NFC antenna device technical field, specifically a kind of active NFC antenna structure of smart watch. BACKGROUND

[0002] Smart watch is a kind of portable wearable device with information processing capability, with multiple functions and can be independently operated or work with other devices, and the active NFC antenna structure of smart watch is the key part to realize its NFC function, and the NFC (near field communication) function enables smart watch to communicate with other NFC-enabled devices within a short distance.

[0003] Through active NFC antenna structure, watch can realize near field communication, which is used for bus payment, access control opening and other scenes, and can enhance interactivity and expand application, and through data transmission with surrounding devices, the application scene and ecosystem of smart watch are expanded, and the existing smart watch has many internal electronic components, the internal NFC antenna is easily interfered by electromagnetic signal generated by other components, and the accuracy and integrity of signal are also interfered by other sensitive components, so that the accuracy and integrity of signal are destroyed. SUMMARY

[0004] The utility model aims at: in order to solve the problem that the existing smart watch has many internal electronic components, the internal NFC antenna is easily interfered by electromagnetic signal generated by other components, and the accuracy and integrity of signal are also interfered by other sensitive components, so that the accuracy and integrity of signal are destroyed, provide a kind of active NFC antenna structure of smart watch.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of active NFC antenna structure of smart watch, comprising: module shell one and module shell two, the circuit board is fixedly connected in the module shell one, the antenna coil one is equipped on the surface of the circuit board one end, the antenna coil two is equipped on the surface of the circuit board other end, the antenna coil one end is fixedly connected with feed, and the module shell two outer side one end is fixedly connected with pin.

[0006] As a further scheme of the utility model: the module shell one back one end is fixedly connected with plastic frame, and the plastic frame inner side is fixedly connected with frame-shaped Nd-Fe-B magnet.

[0007] As a further scheme of the utility model: the module shell one bottom is fixedly connected with fixed rubber ring.

[0008] As a further scheme of the utility model: the module shell one back middle end is fixedly connected with electromagnetic shielding layer one, and the electromagnetic shielding layer one one end is fixedly connected with moisture-proof layer.

[0009] As a further scheme of the utility model: module shell two back surface one end is fixedly connected with magnetic shielding layer two, and one end of the magnetic shielding layer two is fixedly connected with silica gel buffer layer.

[0010] As a further scheme of the utility model: the number of pins is provided with multiple groups, and is symmetrically arranged at both sides of the module shell two.

[0011] As a further scheme of the utility model: one end of the antenna coil two is also provided with a feed structure, and the circuit board is integrated with variable capacitance and inductance adjustable elements.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] In the utility model, the antenna coil one and two of the intelligent watch are NFC signal transceiver cores, work based on electromagnetic induction principle, can receive and radiate signals, the variable capacitance and inductance adjustable elements integrated in the circuit board can optimize the antenna performance according to environmental changes, the frame-shaped neodymium iron boron magnet realizes quick installation and replacement of the antenna, the fixed rubber ring stabilizes the module and the circuit board, the electromagnetic shielding layer and the magnetic shielding layer form a protection system, the moisture-proof layer prevents water vapor, the silica gel buffer layer buffers impact, the pins at both sides of the module shell two are connected with the watch mainboard, power supply for the antenna coil, and normal operation is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the whole structure schematic diagram of the utility model;

[0015] Figure 2 It is the structure schematic diagram of the pin in the utility model;

[0016] Figure 3 It is the structure schematic diagram of the module shell one in the utility model;

[0017] Figure 4 It is the structure schematic diagram of the antenna coil one in the utility model;

[0018] Figure 5 It is the structure schematic diagram of the frame-shaped neodymium iron boron magnet in the utility model.

[0019] In the drawing: 1, module shell one;2, module shell two;3, circuit board;4, antenna coil one;5, antenna coil two;6, feed;7, pin;8, plastic frame;9, frame-shaped neodymium iron boron magnet;10, fixed rubber ring;11, electromagnetic shielding layer one;12, moisture-proof layer;13, magnetic shielding layer two;14, silica gel buffer layer. SPECIFIC EMBODIMENTS

[0020] Clearly and completely describe the technical scheme in the embodiments of the utility model with reference to the drawings in the embodiments of the utility model, obviously, the described embodiments are only some embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of protection of the utility model.

[0021] In the description of the utility model, it should be explained that the orientation or position relation indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relation shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as limiting the indicated device or element to have a specific orientation, to be constructed and operated in a specific orientation, therefore, cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In the description of the utility model, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "setting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication between two elements. For the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. The embodiments of the utility model will be described below according to the overall structure of the utility model.

[0022] Referring to Figures 1 to 4 In the embodiments of the utility model, an active NFC antenna structure of a smart watch comprises: module shell one 1 and module shell two 2, the circuit board 3 is fixedly connected inside the module shell one 1, the module shell one 1, the module shell two 2 and the circuit board 3 form a whole module, one end of the surface of the circuit board 3 is provided with an antenna coil one 4, the other end of the surface of the circuit board 3 is provided with an antenna coil two 5, the antenna coil one 4 and the antenna coil two 5 are the cores of the NFC signal transmission and reception of the smart watch.

[0023] One end of the antenna coil one 4 is fixedly connected with a feed 6, an alternating current is input through the feed 6, so that the coil generates an alternating magnetic field, and the signal is radiated outward, one end of the outer side of the module shell two 2 is fixedly connected with a pin 7, the pin 7 transmits power supply signals for the antenna coil one 4 and the antenna coil two 5, and ensures the normal work of the antenna coil one 4 and the antenna coil two 5, the pin 7 is provided with multiple groups, and is symmetrically arranged on both sides of the module shell two 2, one end of the antenna coil two 5 is also provided with a feed 6 structure, and the circuit board 3 is integrated with variable capacitors and inductance adjustable elements.

[0024] Referring to Figure 1 ,Figure 3 And Figure 5 The back surface of the module shell one 1 is fixedly connected with a plastic frame 8, the inner side of the plastic frame 8 is fixedly connected with a frame-shaped neodymium iron boron magnet 9, the frame-shaped neodymium iron boron magnet 9 enables the antenna structure to be quickly and conveniently installed in the smart watch, and the antenna structure is automatically aligned and adsorbed by magnetic force, the bottom of the module shell one 1 is fixedly connected with a fixed rubber ring 10, so that the module shell one 1 and the module shell two 2 are fixed together, and the circuit board 3 is fixed in the module shell one 1 and the module shell two 2.

[0025] Referring to Figure 1 And Figure 2 The back surface of the module shell one 1 is fixedly connected with a plastic frame 8, the inner side of the plastic frame 8 is fixedly connected with a frame-shaped neodymium iron boron magnet 9, the frame-shaped neodymium iron boron magnet 9 enables the antenna structure to be quickly and conveniently installed in the smart watch, and the antenna structure is automatically aligned and adsorbed by magnetic force, the bottom of the module shell one 1 is fixedly connected with a fixed rubber ring 10, so that the module shell one 1 and the module shell two 2 are fixed together, and the circuit board 3 is fixed in the module shell one 1 and the module shell two 2.

[0026] The working principle of the utility model is that: the antenna coil one 4 and the antenna coil two 5 are the core of the smart watch NFC signal transceiver, and work based on the electromagnetic induction principle, when the external NFC equipment generates an alternating magnetic field, the coil will induce an electromotive force and a current, realizing signal reception; when the watch initiates communication actively, the feed 6 inputs alternating current, so that the coil generates an alternating magnetic field and radiates signals outward, in addition, the variable capacitor and the inductance adjustable element integrated on the circuit board 3 can adjust the optimal resonant frequency of the antenna according to the scene changes such as environmental interference and distance, and optimize the antenna performance; the frame-shaped neodymium iron boron magnet 9 in the inner side of the plastic frame 8 enables the antenna structure to be quickly and conveniently installed in the smart watch, and is automatically aligned and adsorbed by magnetic force, and is also very easy to replace, the fixed rubber ring 10 at the bottom of the module shell one 1 can fix the module shell one 1 and the module shell two 2 together, and fix the circuit board 3 in the module shell one 1 and the module shell two 2; the electromagnetic shielding layer one 11 and the magnetic shielding layer two 13 form an electromagnetic protection system, shield the internal and external electromagnetic interference, and guarantee the electromagnetic compatibility between the elements of the smart watch, the moisture-proof layer 12 can prevent water vapor from entering, avoid the circuit board 3 short circuit, the silica gel buffer layer 14 can buffer external impact and protect internal elements; the multiple groups of pins 7 on the two sides of the module shell two 2 are connected with the watch mainboard by welding or plugging, and transmit power supply signals for the antenna coil one 4 and the antenna coil two 5, so as to ensure the normal work of the antenna coil one 4 and the antenna coil two 5.

[0027] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. An active NFC antenna structure for a smartwatch, characterized in that, include: The module housing is divided into a first housing (1) and a second housing (2). The first housing (1) has a circuit board (3) fixedly connected inside. One end of the surface of the circuit board (3) is provided with an antenna coil (4), and the other end of the surface of the circuit board (3) is provided with an antenna coil (5). One end of the antenna coil (4) is fixedly connected with a power supply (6), and one end of the outer side of the second housing (2) is fixedly connected with a pin (7).

2. The active NFC antenna structure for a smartwatch according to claim 1, characterized in that, A plastic frame (8) is fixedly connected to one end of the back of the module housing (1), and a frame-shaped neodymium iron boron magnet (9) is fixedly connected to the inside of the plastic frame (8).

3. The active NFC antenna structure for a smartwatch according to claim 1, characterized in that, The bottom of the module housing (1) is fixedly connected with a fixing ring (10).

4. The active NFC antenna structure for a smartwatch according to claim 1, characterized in that, An electromagnetic shielding layer (11) is fixedly connected to the middle of the back of the module housing (1), and a moisture-proof layer (12) is fixedly connected to one end of the electromagnetic shielding layer (11).

5. The active NFC antenna structure for a smartwatch according to claim 1, characterized in that, A magnetic shielding layer (13) is fixedly connected to one end of the back of the module housing (2), and a silicone buffer layer (14) is fixedly connected to one end of the magnetic shielding layer (13).

6. The active NFC antenna structure for a smartwatch according to claim 1, characterized in that, The number of pins (7) is provided in multiple groups, and they are symmetrically arranged on both sides of the second (2) of the module housing.

7. The active NFC antenna structure for a smartwatch according to claim 1, characterized in that, The antenna coil (5) is also provided with a power supply (6) structure at one end, and the circuit board (3) integrates adjustable components of variable capacitor and inductor.

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