WO2024027188A1 - Electronic device, and wireless charging coupling structure and power supply device of stylus - Google Patents

Abstract

An electronic device, and a wireless charging coupling structure and a power supply device of a stylus. The wireless charging coupling structure comprises a transmitting module and a receiving module; the transmission module is arranged on the power supply device, wherein the power supply device can specifically be interactive apparatuses such as a mobile phone and a tablet computer, and the stylus can be used as an input component of these interactive apparatuses; the transmitting module comprises a coil component, the coil component is provided with two planar coils arranged in a staggered manner, and current directions of the two planar coils are opposite; the receiving module is arranged on the stylus, the receiving module is provided with a solenoid, and the solenoid is suitable for coupling magnetic fields of the two planar coils for power generation. In the transmitting module of the wireless charging coupling structure, the two planar coils are used as the coil component, and the size of the planar coils in the axial direction thereof is small, so that the mounting space of the planar coils in the axial direction can be reduced, and the heat dissipation performance can be improved.

Description

A wireless charging coupling structure and power supply device for electronic equipment and stylus pens

This application requires the priority of the Chinese patent application submitted to the China Patent Office on August 2, 2022, with the application number 202222025490.3 and the invention title "A wireless charging coupling structure and power supply device for electronic equipment and stylus pens", all of which The contents are incorporated into this application by reference.

Technical field

Embodiments of the present application relate to the technical field of electronic equipment, and in particular, to an electronic equipment, a wireless charging coupling structure of a stylus, and a power supply device.

Background technique

With the development of society and the advancement of technology, a large number of electronic devices with touch functions continue to emerge on the market to enrich people's lives. Common electronic devices with touch functions generally use handwriting for input. When more detailed operation input is required, a stylus can also be used as an input component. The stylus is an electronic device with a battery inside for power supply. Under long-term use conditions, the power of the stylus is likely to be insufficient. At this time, the stylus needs to be charged.

Contents of the invention

Embodiments of the present application provide a wireless charging coupling structure and power supply device for an electronic device and a stylus. The transmitting module of the wireless charging coupling structure uses two planar coils as coil components. The size of the planar coil in its axial direction Smaller, it can reduce the installation space in the axial direction and improve the heat dissipation performance.

In a first aspect, embodiments of the present application provide a wireless charging coupling structure for a stylus, including a transmitting module and a receiving module. The transmitting module is arranged on the power supply device. The power supply device can be a simple charging device, a storage device with a storage function, or an interactive device capable of interacting with the stylus. The transmitting module includes a coil component. The coil component is configured with two offset planar coils, and the current flow directions of the two planar coils are opposite. The receiving module is arranged on the stylus, and is equipped with a solenoid. The solenoid is suitable for coupling the magnetic fields of two planar coils for generating electricity.

In the embodiment of the present application, the coil component of the transmitting module includes two planar coils. The planar coil has a smaller size in its axial direction and takes up less installation space in the axial direction. It is especially suitable for use in tablet computers. , notebook computers, mobile phones and other tablet-type power supply devices; and, the flat coil layout has a relatively large heat dissipation area, has better technical advantages in heat dissipation performance, and can adapt to greater charging power. To facilitate fast charging. The receiving module is equipped with a solenoid, which is a three-dimensional cylindrical coil wound along the axial direction. Its overall shape can better match the shape of the stylus to facilitate installation in the stylus.

In specific use, two planar coils can generate magnetic fields in opposite directions. The magnetic induction lines can be transmitted in the air gap and can pass through the solenoid to form a closed magnetic loop, thereby realizing energy transfer by electromagnetic induction. ; Then, by controlling the continuous change of the current flow direction in the two planar coils, an alternating magnetic field can be generated. The solenoid continuously cuts the magnetic induction lines, which can generate an induced current. This induced current can charge the stylus, thus Realize wireless charging of stylus.

Based on the first aspect, embodiments of the present application also provide a first implementation manner of the first aspect: two planar coils can be electrically connected.

Using this solution, the two planar coils are in a conductive state, and only need to adjust the winding of the two planar coils. In this way, the current flow directions in the two planar coils can be naturally opposite, and the control of the two planar coils can be simplified. Moreover, when two planar coils are connected to each other, the two planar coils are equivalent to a series circuit. The two planar coils only need to be provided with two outlet terminals. The number of outlet terminals can be smaller, and the coil can also be simplified. The outlet structure of the component can thereby simplify the wireless charging coupling structure provided by the embodiment of the present application, which can also save the installation space occupied by the transmitting module in the power supply device to a certain extent.

Based on the first aspect, or based on the first implementation of the first aspect, embodiments of the present application also provide a second implementation of the first aspect: the coil component may include a circuit board; the surface of the circuit board may be laid with conductive wires , and/or, conductive wires are embedded inside the circuit board, and the specific shaping method of the conductive wires can be etching; the conductive wires can be enclosed to form the aforementioned planar coil. The circuit board can be used as the carrier of the planar coil, which can facilitate the winding of the planar coil, improve the structural strength of the coil components, and facilitate the transportation and installation of the planar coil.

Based on the second implementation manner of the first aspect, the embodiment of the present application also provides a third implementation manner of the first aspect: the circuit board includes two connected end plate sections and two connecting plate sections. The plate sections are arranged relative to each other, and the two connecting plate sections are arranged crosswise to achieve layering. In this implementation, the circuit board is basically in a figure-8 shape. Correspondingly, the two planar coils are also basically in a figure-8 shape. The two holes in the figure-8 shape can be used as the center holes of the planar coil, and are used for The receiving module is coupled.

Based on the third implementation of the first aspect, the embodiment of the present application also provides a fourth implementation of the first aspect: the extension direction of the end plate segment can be a non-linear direction, which is more conducive to expanding the figure-8 shape The area of the hole to improve coupling performance.

Based on any one of the second to fourth implementations of the first aspect, embodiments of the present application also provide a fifth implementation of the first aspect: one of the two connecting plate sections and both end plates The segment is an integrated structure. With this arrangement, the entire circuit board is equivalent to two parts. One part includes one of the two connecting plate segments and the two end plate segments, and the other part includes the other of the two connecting plate segments. The assembly of the circuit board can be relatively convenient.

Of course, the two connecting plate sections and the two end plate sections can also be split structures.

Based on any one of the second to fifth implementations of the first aspect, embodiments of the present application also provide a sixth implementation of the first aspect: the circuit board is a flexible circuit board. The thickness of the flexible circuit board is thin, which can reduce the size of the coil component in the axial direction of the planar coil to a greater extent, which facilitates the installation and fixation of tablet-type power supply devices such as tablets, laptops, and mobile phones.

Of course, the circuit board can also be a hard circuit board. Hard circuit boards can provide higher structural strength, and can easily process threaded holes, riveting holes and other installation structures, which can better adapt to many different forms. installation structure.

Based on the first aspect, or based on the first implementation of the first aspect, the embodiment of the present application also provides a seventh implementation of the first aspect: the coil component may also only include conductive wires, and the conductive wires may be wound to form two planes. type coil. At this time, the size of the coil component in the axial direction of the planar coil can be smaller, and accordingly, the installation space occupied by the transmitting module can also be smaller.

Based on the first aspect, or based on any one of the second to seventh implementations of the first aspect, embodiments of the present application further provide an eighth implementation of the first aspect: the transmitting module may also include a magnetic The side of the two planar coils facing away from the receiving module is equipped with a magnetic piece. The magnetic sheet is used to collect and transmit the magnetic induction lines generated by the two planar coils, thereby forming a magnetic circuit, and can increase the magnetic permeability, so that the planar coil with a smaller number of turns can produce higher inductance. It is beneficial to reduce the material consumption of planar coils to reduce costs and further reduce the emission mode. The installation of the block takes up space; moreover, the collection of magnetic flux lines by the magnetic sheet can also reduce the impact of the magnetic field generated by the planar coil on other structural components inside the power supply device.

Based on the eighth implementation manner of the first aspect, embodiments of the present application also provide a ninth implementation manner of the first aspect: the magnetic sheets of the two planar coils are of an integrated structure. Such an arrangement can, on the one hand, facilitate the installation of the transmitting module, and on the other hand, it can also help improve the magnetic permeability.

Based on the first aspect, or based on any one of the second implementation manner to the ninth implementation manner of the first aspect, embodiments of the present application also provide a tenth implementation manner of the first aspect: the receiving module further includes a magnetic rod , the solenoid is wrapped around the outside of the magnet rod. The function of the magnetic rod is similar to that of the magnetic sheet. It can also be used to collect and transmit the magnetic induction lines generated by the two planar coils to form a magnetic loop. It can also increase the magnetic permeability to improve the coupling of the solenoid. This characteristic allows a solenoid with a smaller number of turns to produce a higher inductance, which is beneficial to reducing the material consumption of the solenoid, thereby reducing costs, and can also reduce the installation space of the solenoid.

Based on the tenth implementation manner of the first aspect, the embodiment of the present application also provides an eleventh implementation manner of the first aspect: the magnetic bar includes two protruding sections and a connecting section connecting the two protruding sections, and the solenoid is assembled on In the connecting section, the two protruding sections are coupled to the two planar coils respectively, which can improve the coupling coefficient.

Based on the eleventh implementation manner of the first aspect, the embodiment of the present application also provides a twelfth implementation manner of the first aspect: both planar coils have central holes, and the two protruding sections are located at the center in the orthographic projection of the coil component inside the hole. In this way, more magnetic flux lines can be ensured to pass through the central hole, and the coupling coefficient of the magnetic rod and the planar coil can be further improved to ensure the coupling effect.

Based on the eleventh or twelfth implementation of the first aspect, embodiments of the present application also provide a thirteenth implementation of the first aspect: the area of the cross-section perpendicular to the axial direction of the protruding section is larger than that of the connecting section. , which can further improve the coupling performance between the magnetic rod and the two planar coils.

In a second aspect, embodiments of the present application also provide a power supply device for a stylus, including a transmitting module. The transmitting module is the wireless charging coupling structure of the stylus involved in the first aspect or any one of the embodiments of the first aspect. transmitter module.

The transmitting modules in the first aspect and each embodiment of the first aspect all use planar coils for coupled power generation. The size of the planar coil in the axial direction is smaller, and accordingly, the installation space in the axial direction is larger. Small, which is beneficial to reducing the size of power supply components in this direction. For tablet-type components such as tablet computers, notebook computers, and mobile phones, the axial direction of the planar coil is the thickness direction of these flat-type components. Correspondingly, it is conducive to reducing the thickness of these flat-type components; in the case of the same thickness Under certain conditions, more electronic components can be accommodated in the thickness direction.

In addition, the planar coil has better heat dissipation performance and can also improve the heat dissipation performance of the power supply device, which facilitates the setting of higher charging power between the power supply device and the stylus, thereby enabling fast charging.

Based on the second aspect, the embodiment of the present application also provides a first implementation manner of the second aspect: the power supply device may also include a power supply battery, and the power supply battery is electrically connected to the coil component of the transmitting module, so that the coil component can generate alternating current magnetic field.

Based on the second aspect, or based on the first implementation of the second aspect, embodiments of the present application also provide a second implementation of the second aspect: the power supply device can be an interactive device, that is, a component that can interact with the stylus. , such as mobile phones, tablet computers, notebook computers, wearable components, etc.; or, the power supply device can also be a storage device, which not only realizes wireless charging of the stylus, but also can complete the storage of the stylus to reduce the use of the stylus. non-use status possible loss or damage.

In a third aspect, embodiments of the present application also relate to an electronic device, including a stylus and a power supply device. The stylus and the power supply device are configured with a wireless charging coupling structure. The wireless charging coupling structure is the first aspect or each implementation of the first aspect. Any of the methods involves the wireless charging coupling structure of the stylus.

Description of the drawings

Figure 1 is a schematic structural diagram of an electronic device involved in an embodiment of the present application;

Figure 2 is a schematic structural diagram of the first type of device;

Figure 3 is a schematic structural diagram of the second type of device;

Figure 4 is a schematic structural diagram of the third type of device;

Figure 5 is a schematic structural diagram of some embodiments of the third type of device shown in Figure 4;

Figure 6 is a schematic structural diagram of some embodiments of the wireless charging coupling structure of the stylus provided by the embodiment of the present application;

Figure 7 is a schematic structural diagram of the coil component in Figure 6;

Figure 8 is a schematic structural diagram of another coil component;

Figure 9 is a schematic structural diagram of yet another coil component;

Figure 10 is a schematic structural diagram of yet another coil component;

Figure 11 is a schematic structural diagram of two planar coils when they are independent of each other;

Figure 12 is a schematic structural diagram of the magnetic rod;

Figure 13 is a diagram showing the relative position of the protruding section in the orthographic projection of the coil component and the central hole.

The reference numbers in Figures 1 to 13 are explained as follows:

100 power supply device, 101 cover, 102 box, 103 receiving slot, 104 device body, 104a positioning slot, 105 shell, 106 display screen;

200 stylus;

1 transmitting module, 11 coil components, 111 planar coil, 111a center hole, 112 circuit board, 112a end plate section, 112b connecting plate section, 112c conductive wire, 12 magnetic piece;

2 receiving module, 21 solenoid, 22 magnetic rod, 221 protruding section, 222 connecting section.

Detailed ways

In order to enable those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

In the embodiments of this application, the terms "first", "second" and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, features defined as "first", "second", and "third" may explicitly or implicitly include one or more of these features.

In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly stated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, "connection" may be detachably The connection can also be a non-detachable connection; it can be a direct connection or an indirect connection through an intermediary. Among them, "fixed connection" means that they are connected to each other and their relative positional relationship remains unchanged after connection. "Rotation connection" means that they are connected to each other and can rotate relative to each other after being connected. "Sliding connection" means that they are connected to each other and can slide relative to each other after being connected.

The directional terms mentioned in the embodiments of the present application, such as "inside", "outside", etc., are only for reference to the direction of the drawings. Therefore, the directional terms used are for better and clearer description and understanding of the present application. Example, not indication or implication The devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be construed as limiting the embodiments of the present application. In addition, unless otherwise stated in this application, "plurality" mentioned in this application means two or more.

In the description of the embodiments of the present application, the terms "comprising", "comprising" or any other variation thereof are intended to cover a non-exclusive inclusion, such that a process, method, article or device that includes a series of elements not only includes those elements, It also includes other elements not expressly listed or inherent in the process, method, article or apparatus. Without further limitation, an element defined by the statement "comprises a..." does not exclude the presence of additional identical elements in a process, method, article or apparatus that includes that element.

In the embodiment of this application, "and/or" is just an association relationship describing associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, and A and A exist simultaneously. B, there are three situations of B alone. In addition, the character "/" in this article generally indicates that the related objects are an "or" relationship.

Please refer to FIG. 1 , which is a schematic structural diagram of an electronic device according to an embodiment of the present application.

As shown in Figure 1, an embodiment of the present application relates to an electronic device. The electronic device may include a power supply device 100 and a stylus 200. The power supply device 100 is provided with a transmitting module, and the stylus 200 is provided with a receiving module. The transmitting module and the receiving module can be coupled to realize wireless charging of the power supply device 100 to the stylus 200 . The wireless charging method does not require a charging cable between the stylus 200 and the power supply device 100, which can simplify the structure of the electronic device. At the same time, there is no need to set a charging interface on the stylus 200, and the appearance of the stylus 200 can be more beautiful, and It is beneficial to improve the dustproof and waterproof performance of the stylus 200.

In order to ensure the stability of wireless charging, the stylus 200 is usually equipped with a magnet to fix the stylus 200 to the power supply device 100 through magnetic attraction. Of course, the magnet can also be provided on the power supply device 100, so that the stylus 200 can also be magnetically fixed. It should be pointed out that the fixing method of the stylus pen 200 is not limited to magnetic suction, and can also include plugging, snapping, etc., as long as the reliable fixing of the stylus pen 200 can be ensured.

The power supply device 100 can have various structural forms, as long as it can realize the wireless charging function of the stylus 200 . The embodiment of this application divides the power supply device 100 into three types of devices based on the functional differences of several typical power supply devices 100. For convenience of description, the embodiment of this application names these three types of devices as first type devices and second type devices respectively. devices and the third type of devices. The following embodiments of the present application will describe the specific structural forms of these three types of devices. It can be understood that the types of the power supply device 100 are not limited to the above three types of devices.

Please refer to Figure 2, which is a schematic structural diagram of the first type of device.

As shown in FIG. 2 , the first type of device may be a storage device, including a cover 101 and a box 102 . The box body 102 may form a receiving groove 103, and the stylus 200 may be placed in the receiving groove 103 when not in use. The cover 101 can be installed on the box 102 and can move relative to the box 102 to open and seal the accommodation slot 103 . In the open state, the stylus 200 can be placed in the receiving groove 103 for storage, or the stylus 200 can be taken out from the receiving groove 103 . In the blocked state, the entire stylus pen 200 is packaged inside the storage device, and the stylus pen 200 is not easily dropped or lost.

The cover 101 and the box 102 may be rotationally connected. In this case, a rotating shaft may be arranged between the cover 101 and the box 102, and the cover 101 may rotate around the central axis of the rotating shaft to achieve the accommodation slot 103. Sealing and opening of openings. In this solution, in order to ensure reliable connection between the cover 101 and the box 102 in the blocked state, a magnetic suction structure can also be configured for the cover 101 and the box 102 to ensure that the cover 101 is magnetically attracted to the box 102 . Accommodation tank 103 is blocked reliability. Of course, in addition to the magnetic attraction solution, a snap-on structure can also be configured, which can also achieve reliable connection between the cover 101 and the box 102 in the closed state.

Alternatively, the cover 101 and the box 102 can also be slidingly connected. In this case, one of the cover 101 and the box 102 can be equipped with a chute, and the other of the cover 101 and the box 102 can be It is slidably mounted on the chute, so that the opening of the accommodation groove 103 can also be blocked or opened.

In the embodiment of FIG. 2 , the entire storage device is in the shape of a rectangular parallelepiped. In fact, the storage device can also be set in other structural styles, such as triangular prism style, pentagonal prism style or other special-shaped structural styles.

At least one of the cover 101 and the box 102 may be configured with the aforementioned transmitting module, and the transmitting module may generate an alternating magnetic field for wireless charging of the stylus 200 . The storage device can be equipped with a power supply battery. The power supply battery can be a lithium battery, etc., and has a rechargeable or replaceable function. The power supply battery can directly provide power to the transmitting module, so that the transmitting module can generate the above-mentioned alternating current. magnetic field. Alternatively, the storage device can also be equipped with a charging interface. The charging interface can be a lightning interface, a type-c interface, a MicroUSB interface, a socket, etc. Then, the charging interface and an external power supply (such as a power socket) can be connected by connecting a cable. ) is electrically connected to obtain electric energy directly from an external power source, so that the transmitting module can generate the above-mentioned alternating magnetic field; of course, the storage device can also be directly equipped with a charging cable, and the charging cable can be provided with a plug, which is used for and The external power supply is electrically connected so that power support can also be obtained directly from the external power supply.

In some other solutions, the storage device may only include the box 102, that is, it may not include the cover 101.

Please refer to Figure 3, which is a schematic structural diagram of the second type of device.

Different from the first type of device mentioned above, the second type of device can be a charging device, which only has a charging function and does not have a storage function. As shown in FIG. 3 , the second type of device may include a device body 104 , and a transmitting module is provided in the device body 14 . The transmitting module can generate an alternating magnetic field to achieve wireless charging of the stylus 200 . The power source of the transmitting module can be a power supply battery or an external power supply. For details, please refer to the relevant descriptions in the first type of device, and no repeated explanation will be given here. The specific structural form of the device body 104 is not limited here, as long as it does not affect its function of wirelessly charging the stylus 200 .

In some embodiments, the device body 104 can also be provided with a positioning groove 104a, and the stylus 200 can be placed in the positioning groove 104a to ensure reliable installation of the stylus 200 on the power supply device 100.

Different from the above-mentioned first-type devices and second-type devices, the third-type device can be an interactive device, and there can be interaction between it and the stylus 200. The stylus 200 can be used as an input component of the third-type device. In this embodiment, the power supply device 100 may be a handheld component, a vehicle-mounted component, a wearable component, a computing component, or other processing component connected to a wireless modem. May also include cellular phones, smart phones, personal digital assistant (PDA) computers, tablet computers, laptop computers, laptop computers, video cameras, video recorders, cameras , smart watches, smart wristbands, in-vehicle computers, ink screens and other terminal components with touch functions.

Please refer to FIG. 4 and FIG. 5 . FIG. 4 is a schematic structural diagram of a third type device, and FIG. 5 is a schematic structural diagram of some embodiments of the third type device shown in FIG. 4 .

As shown in FIG. 4 , the power supply device 100 as the third type of device may include a processor 110 , an external memory interface 120 , an internal memory 121 , a universal serial bus (USB) interface 130 , a charging management module 140 , and a power supply. Management module 141, battery 142, antenna 1, antenna 2, mobile communication module 150, wireless communication module 160, audio frequency module 170, speaker 170A, receiver 170B, microphone 170C, headphone interface 170D, sensor module 180, button 190, motor 191, indicator 192, camera 193, display module 194, and subscriber identification module (SIM) card Interface 195 etc. The sensor module 180 may include a pressure sensor 180A, a gyro sensor 180B, an air pressure sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, a proximity light sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, and ambient light. Sensor 180L, bone conduction sensor 180M, etc.

It can be understood that the structure shown in FIG. 4 does not constitute a specific limitation on the power supply device 100. In other embodiments of the present application, the power supply device 100 may include more or less components than shown in the figures, or some components may be combined, or some components may be separated, or may be arranged in different arrangements. The components illustrated may be implemented in hardware, software, or a combination of software and hardware.

The power supply device 100 implements display functions through a graphics processing unit (GPU), a display module 194, an application processor, and the like. The GPU is an image processing microprocessor and is connected to the display module 194 and the application processor. GPUs are used to perform mathematical and geometric calculations for graphics rendering. Processor 110 may include one or more GPUs that execute program instructions to generate or alter display information.

The display module 194 is used to display images, videos, etc. Display module 194 includes a display panel. The display panel can use a liquid crystal display module (liquid crystal display, LCD), an organic light-emitting diode (OLED), an active matrix organic light emitting diode or an active matrix organic light emitting diode (active-matrix organic light emitting diode). emitting diode (AMOLED), flexible light-emitting diode (FLED), Miniled, MicroLed, Micro-oLed, quantum dot light emitting diode (QLED), etc. In some solutions, the power supply device 100 may include 1 or N display modules 194, where N is a positive integer greater than 1.

The pressure sensor 180A is used to sense pressure signals and can convert the pressure signals into electrical signals. In some solutions, the pressure sensor 180A may be disposed on the display module 194 . There are many types of pressure sensors 180A, such as resistive pressure sensors, inductive pressure sensors, capacitive pressure sensors, etc. A capacitive pressure sensor may include at least two parallel plates of conductive material. When a force is applied to pressure sensor 180A, the capacitance between the electrodes changes. The power supply device 100 determines the intensity of the pressure based on changes in capacitance. When a touch operation is performed on the display module 194, the power supply device 100 detects the intensity of the touch operation according to the pressure sensor 180A. The power supply device 100 may also calculate the touched position based on the detection signal of the pressure sensor 180A. In some solutions, touch operations that act on the same touch location but with different touch operation intensities can correspond to different operation instructions. For example: when there is a touch operation with an intensity less than the first pressure threshold acting on the short message application icon, the instruction to view the short message is executed; when there is a touch operation with an intensity greater than or equal to the first pressure threshold acting on the short message application icon, execute the instruction to create a new short message; the specific value of the first pressure threshold is not limited here.

Touch sensor 180K, also known as "touch device". The touch sensor 180K can be disposed on the display module 194. The touch sensor 180K and the display module 194 form a touch screen, which is also called a "touch screen". The touch sensor 180K is used to detect a touch operation on or near the touch sensor 180K. The touch sensor can pass the detected touch operation to the application processor to determine the touch event type. Visual output related to the touch operation may be provided through the display module 194 . In other solutions, the touch sensor 180K can also be disposed on the surface of the power supply device 100 in a position different from that of the display module 194. For example, it can be disposed on the touch panel of a notebook computer.

The battery 142 in the power supply device 100 can be electrically connected to the transmitting module to provide power support for the transmitting module so that the transmitting module can generate an alternating magnetic field, thereby enabling wireless charging of the stylus 200 .

As shown in FIG. 5 , in some embodiments, the power supply device 100 may be a tablet computer, including a housing 105 and a display screen 106 .

The housing 105 forms an accommodation space for arranging various electronic devices of the terminal device 100, such as the aforementioned battery 142, antenna, motherboard, camera 193, speaker 170A, transmitting module, etc. At the same time, the housing 105 can also play a role in protecting the terminal device 100 . The display screen 106 may be mounted on the housing 105 . In some embodiments, the housing 105 includes a back cover and a middle frame, and the display screen 106 and the back cover can be respectively fixed on opposite sides of the middle frame. The material of the housing 105 may be metal, plastic, ceramic or glass. When the housing 105 includes a back cover and a middle frame, the materials of the back cover and the middle frame may be the same or different.

The housing 105 can determine the structural shape of the terminal device 100. In the embodiment of FIG. 5, the terminal device 100 is basically in the shape of a rectangular flat plate. In some other embodiments, the shape of the terminal device 100 may also be a square flat plate, a rhombus flat plate, a circular flat plate, an elliptical flat plate, an oblong flat plate, a triangular flat plate or a special-shaped flat plate, etc.

The display screen 106 can be a liquid crystal display (LCD) screen, an organic light emitting diode (OLED) display screen, etc., wherein the OLED display screen can be a flexible display screen or a hard display screen. The display screen 106 can be an ordinary regular screen, or a special-shaped screen, a folding screen, etc. For example, the display screen 106 can be relatively freely rotated and folded to form an arc, a sphere, a cylinder, etc. The display screen 106 may be disposed on the front of the terminal device 100 , or may be disposed on the back of the terminal device 100 , or may be disposed on both the front and back of the terminal device 100 . The front of the terminal device 100 can be understood as the side facing the user when using the terminal device 100 , and the back of the terminal device 100 can be understood as the side facing away from the user when using the terminal device 100 .

Take it being installed on the front of the terminal device 100 as an example. In terms of layout range, the display screen 106 can cover all areas on the front of the terminal device 100, that is, it can form a full-screen terminal device 100. At this time, the display screen 106 not only has a display function, but also usually has a touch function, that is, through The terminal device 100 can be operated by clicking on the display screen 106 . Alternatively, the display screen 106 can only cover a partial area on the front of the terminal device 100. In this case, the display screen 106 can have a touch function or only a display function; when it only has a display function, the housing 105 is not provided with a display screen. The area 106 can be configured with corresponding human-machine operating elements such as buttons to operate the terminal device 100. These human-machine operating elements can be arranged at any position such as the front, back or side of the terminal device 100.

When charging the stylus 200, the stylus 200 can be placed on the side of the housing 105 away from the display screen 106. The specific installation method can be magnetic attraction, snapping, etc.

The following embodiments of the present application focus on describing the wireless charging coupling structure of the stylus 200 and the power supply component 100, that is, the specific structures of the transmitting module and the receiving module.

Please refer to FIG. 6 , which is a schematic structural diagram of some embodiments of a wireless charging coupling structure of a stylus provided by embodiments of the present application.

In some embodiments, as shown in FIG. 6 , embodiments of the present application provide a wireless charging coupling structure for a stylus 200 , including a transmitting module 1 and a receiving module 2 .

The transmitting module 1 includes a coil component 11 and a magnetic sheet 12. The coil component 11 is installed on the magnetic sheet 12. The specific installation method may be bonding, snapping, screw connection, welding, riveting, etc. Among them, the bonding method does not require the coil component 11 and The magnetic piece 12 is configured with an installation structure, which is beneficial to simplifying the structure of the transmitting module 1 .

The coil component 11 is provided with two offset planar coils 111 . The misaligned arrangement here means that the two planar coils 111 are not coaxial. The planar coil 111 here specifically refers to a coil that is basically wound in the same plane. The coil includes several turns, and each turn is basically distributed in the radial direction rather than in the axial direction. Therefore, the coil formed The overall shape is planar to distinguish it from the three-dimensional cylindrical coil wound in the axial direction; however, it should be noted that the embodiment of the present application does not require that the conductive wires of the planar coil 111 are absolutely distributed on a plane, as long as they are roughly Just wind it in the radial direction. This form of coil component 11 has a smaller size in the axial direction and occupies less installation space in the axial direction. It is especially suitable for assembly of tablet-type power supply devices 100 such as tablet computers, notebook computers, and mobile phones. Moreover, this form of coil component 11 has a relatively large heat dissipation area, has better technical advantages in heat dissipation performance, and can adapt to greater charging power to facilitate fast charging.

The current flow directions in the two planar coils 111 can be opposite, so that the directions of the magnetic fields generated by the two planar coils 111 are basically opposite.

The magnetic sheet 12 can be basically plate-shaped, and can be located on the side of the coil component 11 away from the receiving module 2, and is used to collect and transmit the magnetic induction lines generated by the two planar coils 111, thereby forming a magnetic circuit, and The magnetic permeability can be increased, so that the planar coil 111 with fewer turns can produce a higher inductance, which is beneficial to reducing the material consumption of the planar coil 111 to reduce costs, and can further reduce the installation space occupied by the transmitter module 1; Moreover, the magnetic sheet 12 collects magnetic flux lines and can also reduce the impact of the magnetic field generated by the planar coil 111 on other structural components inside the power supply device 100 . In the embodiment of FIG. 6 , two planar coils 111 can share the same magnetic piece 12 , which can facilitate the installation of the transmitting module 1 in the power supply device 100 and can also help improve the magnetic permeability. Of course, the two planar coils 111 can also be equipped with magnetic sheets 12 respectively. In this case, the amount of magnetic sheets 12 can be less, which can reduce the installation space occupied by the transmitting module 1 to a greater extent.

The material of the magnetic sheet 12 may be soft magnetic materials such as ferrite and nanocrystals. Taking nanocrystals as an example, the magnetic sheet 12 can be prepared using multiple layers of nanocrystals to improve the coupling performance of the magnetic sheet 12 .

The receiving module 2 includes a solenoid 21 and a magnetic rod 22. The solenoid 21 is a three-dimensional cylindrical coil wound along the axial direction of the magnetic rod 22. The specific winding method can be clockwise or counterclockwise. The solenoid 21 is suitable for coupling the magnetic fields of the two planar coils 111, and the magnetic rod 22 is used to collect and transmit the magnetic induction lines generated by the two planar coils 111, thereby forming a magnetic loop and improving the magnetic permeability. Improving the coupling characteristics of the solenoid 21 allows the solenoid 21 with a smaller number of turns to produce a higher inductance, which is beneficial to reducing the material consumption of the solenoid 21, thereby reducing costs, and can reduce the number of solenoid 21 Installation takes up space. The material of the magnetic rod 22 may also be soft magnetic materials such as ferrite and nanocrystals.

Using the above solution, the magnetic fields in opposite directions generated by the two planar coils 111 can be transmitted within the magnetic sheet 12 and the magnetic rod 22 as well as the air gap to form a closed magnetic circuit, thereby realizing the energy transfer of electromagnetic induction, and then By controlling the continuous change of the current flow direction in the two planar coils 111, an alternating magnetic field can be generated. The solenoid 21 continuously cuts the magnetic induction lines to generate an induced current. This induced current can charge the stylus 200, thereby Implement wireless charging of the stylus 200.

In some other embodiments, the transmitting module 1 can also omit the magnetic sheet 12. In this case, the structural form of the transmitting module 1 can be simpler, the installation space of the transmitting module 1 can be smaller, and the cost can be lower. Similarly, the receiving module 2 can also omit the magnetic rod 22. In this case, the structural form of the receiving module 2 can also be simplified, and the installation space of the receiving module 2 can be smaller and the cost can be lowered. When the magnetic piece 12 and the magnetic rod 22 are omitted, the two planar coils 111 generate The magnetic flux lines may propagate in the air and couple with the solenoid 21 .

As still shown in FIG. 6 , the coil component 11 may include a circuit board 112 , and conductive wires 112 c may be laid on the surface of the circuit board 112 , and/or conductive wires 112 c may be buried inside the circuit board 112 ; how to form the conductive wires 112 c It can be etching, etc.; the conductive wires 112c can surround the aforementioned planar coil 111. The number of turns of the planar coil 111 is not limited here, and can be determined based on actual inductance requirements. Using this solution, the circuit board 112 is the carrier of the planar coil 111, which can facilitate the winding of the planar coil 111, improve the structural strength of the coil component 11, and facilitate the transportation and installation of the planar coil 111.

Please refer to Figure 7, which is a schematic structural diagram of the coil component in Figure 6.

As shown in Figure 7, in some embodiments, the circuit board 112 may include two connected end plate segments 112a and two connecting plate segments 112b. The two end plate segments 112a may be arranged oppositely, and the two connecting plate segments 112b Can be set crosswise to achieve layering. With this arrangement, the circuit board 112 as a whole presents an eight-shaped structure. The two planar coils 111 can be wound simultaneously by the conductive wires 112c, and the two planar coils 111 can be electrically connected. When the conductive wires 112c are energized, the two planar coils 111 are energized. The current directions in the two planar coils 111 can be naturally opposite, and the current magnitudes can be the same, which can simplify the control of the two planar coils 111 . The coil component 11 of this form may have two outlet terminals, and the location of the two outlet terminals may not be limited, and may be specifically determined based on the actual installation environment.

In this embodiment, due to the cross arrangement of the two connecting plate sections 112b, the conductive wires 112c of the two planar coils 111 are not completely located in the same plane.

The end plate section 112a can be U-shaped. With the two connecting plate sections 112b arranged crosswise, the center hole 111a of the planar coil 111 is basically a pentagonal hole. The center hole 111a has a larger magnetic conductive area and can be more flexible. It is well coupled with the magnetic rod 22.

In addition to the above-mentioned U-shaped design, the end plate section 112a can also be configured in other shapes. In some embodiments, the extension direction of the end plate segment 112a may still be a non-linear direction. In this case, the end plate segment 112a may present various structural shapes such as arc-shaped and V-shaped. In other embodiments, the extension direction of the end plate segment 112a may also be a straight direction. In this case, the end plate segment 112a appears as a straight plate segment, which is also feasible.

Similarly, for the connecting plate section 112b, its extending direction may be a linear direction or a non-linear direction.

It should be understood that the shape design of the end plate section 112a and the connecting plate section 112b basically determines the structural style of the central hole 111a of the planar coil 111. In the embodiment of Figures 6 and 7, the central hole 111a is a pentagonal hole. In addition, the central hole 111a may also be a circular hole, an elliptical hole, a triangular hole, a quadrangular hole, other polygonal holes (number of sides greater than 5) or some special-shaped holes, etc.

Please continue to refer to Figure 7. During preparation and processing, one of the two connecting plate sections 112b and the two end plate sections 112a can be an integral structure. In this way, the entire circuit board 112 is equivalent to two parts. One part includes one of the two connecting plate segments 112b and the two end plate segments 112a, and the other part includes the other of the two connecting plate segments 112b. The assembly of the circuit board 112 can be Relatively convenient; the connection methods of the two parts of the circuit board 112 may include bonding, snapping, screw connection, welding, riveting, etc., as long as the conductive wires 112c of the two parts can be electrically connected.

In some other embodiments, the two connecting plate sections 112b and the two end plate sections 112a can both have a split structure, and then be connected by bonding, clamping, screw connection, welding, riveting, etc., so that , it is more convenient to form complex-shaped connecting plate sections 112b and end plate sections 112a, and is conducive to saving materials.

The above-mentioned circuit board 112 can be a hard circuit board, and the hard circuit board can provide higher structural strength, and, It can easily process threaded holes, riveting holes and other installation structures, and can better adapt to many different forms of installation structures. Alternatively, the above-mentioned circuit board 112 can also be a flexible circuit board. The thickness of the flexible circuit board is thin, which can reduce the size of the coil component 11 in the axial direction of the planar coil 111 to a greater extent, which is convenient for use in tablet computers and notebook computers. , mobile phones and other tablet-type power supply devices 100 are installed and fixed.

Please refer to Figure 8, which is a schematic structural diagram of another coil component.

In some other embodiments, the planar coils 111 provided on the circuit board 112 can also be wound separately. As shown in FIG. 8 , the conductive wire 112c can be wound around the left planar coil 111 first, and then the right planar coil 111 can be wound around. In this way, there is basically no overlap between the two planar coils 111 in the axial direction of the planar coils 111, and the conductive wires 112c of the two planar coils 111 are basically on the same plane, which can reduce the length of the coil component 11 to a greater extent. The axial dimension of coil 111.

In this implementation, the circuit board 112 may have an integrated structure or a split structure.

Please refer to Figures 9 and 10. Figure 9 is a schematic structural diagram of yet another coil component, and Figure 10 is a schematic structural diagram of yet another coil component.

As shown in FIGS. 9 and 10 , in some other embodiments, the coil component 11 may only include a conductive wire 112 c, and then the conductive wire 112 c may be wound to form two planar coils 111 . At this time, the size of the coil component 11 in the axial direction of the planar coil 111 is smaller, which is more conducive to reducing the installation space occupied by the transmitting module 1 in the power supply device 100, and is beneficial to the installation of tablet computers, notebook computers, mobile phones, etc. The power supply device 100 is installed and fixed.

In this embodiment, the outlet end of the planar coil 111 may be located radially inside or outside the planar coil 111 . The positions of the outlet ends of the two planar coils 111 may be the same or different.

Please refer to Figure 11, which is a schematic structural diagram of two planar coils when they are independent of each other.

As shown in FIG. 11 , in some other embodiments, the two planar coils 111 can also be independent of each other. At this time, each of the two planar coils 111 can be configured with two outlet terminals, and the current direction and current magnitude of the two planar coils 111 can be controlled individually.

Please refer to Figure 12, which is a schematic structural diagram of the magnetic rod.

As shown in Figure 12 and combined with Figure 6, the magnetic bar 22 can include two protruding sections 221 and a connecting section 222 connecting the two protruding sections 221. The solenoid 21 can be assembled on the connecting section 222. In this way, it is equivalent to two The protruding sections 221 respectively protrude along both ends of the solenoid 21 in the axial direction. The two protruding sections 221 can be respectively used to couple with the two planar coils 111 to improve the coupling coefficient. In some other embodiments, only one protruding segment 221 may exist, or no protruding segment 221 may exist.

The area of the cross-section perpendicular to the axial direction of the two protruding sections 221 can be larger than the connecting section 222, that is, the magnetic bar 22 can be presented as a dumbbell-shaped structure with thick ends and a thin middle. In this way, the coupling performance of the magnetic bar 22 and the two planar coils 111 is improved. It can be better.

It should be noted that the embodiment of the present application does not limit the shape of the cross-section perpendicular to the axial direction of the magnetic rod 22. During specific implementation, those skilled in the art can design it according to actual needs, as long as it can meet the requirements of use. In the embodiment of FIG. 12 , the cross-section perpendicular to the axial direction of the magnetic bar 22 is similar to a rectangle. In addition, the cross-section perpendicular to the axial direction of the magnetic bar 22 can also be designed as a circle, a triangle, a quadrilateral, or other polygons (sides). number greater than 4) or other special shapes, etc.

Please refer to Figure 13, which is a diagram showing the relative position of the protruding section in the orthographic projection of the coil component and the central hole.

In some optional implementations, as shown in FIG. 13 , the orthographic projection of the protruding section 221 on the coil component 11 can be positioned at in the central hole 111a. Such an arrangement can ensure that more magnetic flux lines pass through the central hole 111a, and further improve the coupling coefficient between the magnetic rod 22 and the planar coil 111 to ensure the coupling effect.

The above are only the preferred embodiments of the present application. It should be pointed out that for those of ordinary skill in the art, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as This is the protection scope of this application.

Claims (32)

1. A wireless charging coupling structure for a stylus, which is characterized by including:

   A transmitting module, which is provided on the power supply device. The transmitting module includes a coil component. The coil component is configured with two offset planar coils, and the current flow directions of the two planar coils are opposite;

   A receiving module is provided on the stylus. The receiving module is configured with a solenoid, and the solenoid is suitable for coupling the magnetic fields of the two planar coils for generating electricity.
2. The wireless charging coupling structure of the stylus pen according to claim 1, wherein the two planar coils are electrically connected.
3. The wireless charging coupling structure of the stylus according to claim 1 or 2, characterized in that the coil component includes a circuit board, the surface of the circuit board is laid with conductive wires, and/or the circuit board is embedded inside There are conductive wires, and the conductive wires enclose to form the planar coil.
4. The wireless charging coupling structure of the stylus according to claim 3, wherein the circuit board includes two connected end plate sections and two connecting plate sections, the two end plate sections are arranged oppositely, and the two end plate sections are arranged oppositely. The connecting plate sections are arranged crosswise.
5. The wireless charging coupling structure of the stylus pen according to claim 4, wherein the extension direction of the end plate section is a non-linear direction.
6. The wireless charging coupling structure of the stylus according to any one of claims 3 to 5, characterized in that one of the two connecting plate sections and the two end plate sections are an integrated structure.
7. The wireless charging coupling structure of the stylus according to any one of claims 3-6, wherein the circuit board is a flexible circuit board.
8. The wireless charging coupling structure of the stylus according to claim 1 or 2, wherein the coil component only includes conductive wires, and the conductive wires are wound to form two planar coils.
9. The wireless charging coupling structure of the stylus according to any one of claims 1 to 8, characterized in that the transmitting module further includes a magnetic piece, and the sides of the two planar coils facing away from the receiving module are equipped with The magnetic piece.
10. The wireless charging coupling structure of the stylus according to claim 9, wherein the magnetic pieces of the two planar coils are of an integrated structure.
11. The wireless charging coupling structure of the stylus according to any one of claims 1 to 10, wherein the receiving module further includes a magnetic rod, and the solenoid is wound around the outside of the magnetic rod.
12. The wireless charging coupling structure of the stylus according to claim 11, wherein the magnetic rod includes two protruding sections and a connecting section connecting the two protruding sections, and the solenoid is assembled on the connecting section, The two protruding sections are respectively coupled to the two planar coils.
13. The wireless charging coupling structure of the stylus pen according to claim 12, wherein the two planar coils each have a central hole, and the two protruding sections are located in the central hole in the orthographic projection of the coil component.
14. The wireless charging coupling structure of the stylus according to claim 12 or 13, wherein the area of the cross-section perpendicular to the axial direction of the protruding section is larger than that of the connecting section.
15. A power supply device for a handwriting pen, characterized in that it includes a transmitting module, and the transmitting module is the transmitting module in the wireless charging coupling structure of the handwriting pen according to any one of claims 1-14.
16. The power supply device for the stylus pen according to claim 15, further comprising a power supply battery, and the power supply device An electric battery is electrically connected to the coil component of the transmitting module.
17. The power supply device of the handwriting pen according to claim 15 or 16, characterized in that the power supply device is an interactive device, or the power supply device is a storage device.
18. An electronic device, including a stylus and a power supply device, the stylus and the power supply device are configured with a wireless charging coupling structure, characterized in that the wireless charging coupling structure is as described in any one of claims 1-14 Wireless charging coupling structure of stylus.
19. A wireless charging coupling structure for a stylus, which is characterized by including:

    A transmitting module, which is provided on the power supply device. The transmitting module includes a coil component. The coil component is configured with two offset planar coils, and the current flow directions of the two planar coils are opposite;

    A receiving module is provided on the stylus. The receiving module is configured with a solenoid, and the solenoid is suitable for coupling the magnetic fields of the two planar coils for generating electricity.
20. The wireless charging coupling structure of the stylus pen according to claim 19, wherein the two planar coils are electrically connected.
21. The wireless charging coupling structure of the stylus according to claim 19, wherein the coil component includes a circuit board, a conductive wire is laid on the surface of the circuit board, and/or a conductive wire is embedded in the interior of the circuit board. wires, and the conductive wires enclose to form the planar coil.
22. The wireless charging coupling structure of the stylus according to claim 21, wherein the circuit board includes two connected end plate sections and two connecting plate sections, the two end plate sections are arranged oppositely, and the two end plate sections are arranged oppositely. The connecting plate sections are arranged crosswise.
23. The wireless charging coupling structure of the stylus pen according to claim 22, wherein the extension direction of the end plate section is a non-linear direction.
24. The wireless charging coupling structure of the stylus according to claim 22, wherein one of the two connecting plate sections and the two end plate sections are an integrated structure.
25. The wireless charging coupling structure of the stylus according to claim 21, wherein the circuit board is a flexible circuit board.
26. The wireless charging coupling structure of the stylus according to claim 19, wherein the coil component only includes conductive wires, and the conductive wires are wound to form two planar coils.
27. The wireless charging coupling structure of the stylus according to any one of claims 19 to 26, characterized in that the transmitting module further includes a magnetic piece, and the sides of the two planar coils facing away from the receiving module are equipped with The magnetic piece.
28. The wireless charging coupling structure of the stylus according to claim 27, wherein the magnetic pieces of the two planar coils are of an integrated structure.
29. The wireless charging coupling structure of the stylus according to any one of claims 19 to 26, wherein the receiving module further includes a magnetic rod, and the solenoid is wound around the outside of the magnetic rod.
30. The wireless charging coupling structure of the stylus according to claim 29, wherein the magnetic rod includes two protruding sections and a connecting section connecting the two protruding sections, and the solenoid is assembled on the connecting section, The two protruding sections are respectively coupled to the two planar coils.
31. The wireless charging coupling structure of the stylus pen according to claim 30, characterized in that both the planar coils have a central hole, and the two protruding sections are located in the central hole in the orthographic projection of the coil component.
32. The wireless charging coupling structure of the stylus pen according to claim 30, wherein the area of the cross-section perpendicular to the axial direction of the protruding section is larger than that of the connecting section.