A magnetic core embedded wireless charging transmitting device

Abstract

The application provides a kind of magnetic core embedded wireless charging transmitting device, including shell, the transmitting coil module and the magnetic core assembly being arranged above the shell, the transmitting coil module and the magnetic core assembly form electromagnetic conversion area with the control circuit in the shell, the transmitting coil module and the magnetic core assembly are equipped with a plurality of heat dissipation holes being communicated with electromagnetic conversion area, further including lifting seat and reset spring, the shell is provided with vertical upward guide column, the lifting seat is slidably sleeved on the guide column, the lifting seat is used to carry the equipment to be charged, and can descend along the guide column under the action of device gravity, the magnetic core assembly is fixedly connected to the top of the lifting seat, and the coupling area of the magnetic core assembly is coaxially slidingly matched with the transmitting coil module, the reset spring is arranged between the lifting seat and the shell, for resetting the lifting seat when the equipment is removed.

Description

Technical Field

[0001] This invention relates to the field of wireless charging technology, and in particular to a magnetic core embedded wireless charging transmitter suitable for large electronic devices such as tablets, laptops, or smart speakers. Background Technology

[0002] With the increasing popularity of wireless charging technology, more and more electronic devices support wireless charging. However, existing wireless charging transmitters are mainly designed for small devices such as smartphones, with small transmitting coil modules and low power, typically 5W-15W. When applied to larger devices such as tablets, laptops, or smart speakers, the following prominent problems exist: First, the wireless charging receiver coils of large-sized devices typically have a large area, and when coupled with the transmitting coil module, they cover a wide area, making it difficult to effectively dissipate the heat generated by the transmitting coil module and magnetic core assembly during operation. Since the device casing covers most of the charging surface, the heat dissipation vents are easily blocked or accumulate dust, fibers, and other foreign objects, further worsening heat dissipation conditions. Over time, clogged heat dissipation vents can cause localized overheating, reducing charging efficiency and even damaging internal circuitry.

[0003] Secondly, the weight difference between large-sized devices is enormous: a tablet might weigh only 300g, while a gaming laptop can weigh over 2.5kg. Devices of different weights have different charging power requirements. Using excessively high power for lightweight devices can lead to overheating, while insufficient power for heavier devices results in slow charging. Existing wireless charging transmitters cannot automatically match the optimal transmission power based on the device's weight; users must manually select the charging mode, leading to a poor user experience and potential safety hazards. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a magnetic core embedded wireless charging transmitter.

[0005] The technical solution provided by this invention is a magnetic core embedded wireless charging transmitter, comprising a housing, a transmitting coil module and a magnetic core assembly disposed above the housing, wherein the transmitting coil module and the magnetic core assembly form an electromagnetic conversion area with a control circuit within the housing, and the transmitting coil module and the magnetic core assembly are provided with a plurality of heat dissipation holes communicating with the electromagnetic conversion area; it also includes a lifting seat and a return spring, wherein the housing is provided with a vertically upward guide post, the lifting seat is slidably fitted onto the guide post, the lifting seat is used to support the device to be charged and can move downward along the guide post under the action of the device's gravity, the magnetic core assembly is fixedly connected to the top of the lifting seat, and the coupling area of ​​the magnetic core assembly is coaxially and slidably engaged with the transmitting coil module; the return spring is disposed between the lifting seat and the housing, and is used to reset the lifting seat when the device is removed; it also includes a first linkage mechanism and a second linkage mechanism, the first linkage mechanism including a fixed The system includes a lifting rod on a lifting platform, a drive rod mounted on the lifting rod, and a pressure seat at the end of the drive rod. When the lifting platform descends, the pressure seat presses against a drive wrench connected to a power adjustment plate on the housing, causing the power adjustment plate to rotate and adjust the transmission power output by the transmitting coil module to the device to be charged. The transmission power is positively correlated with the weight of the device. The second linkage mechanism includes an elastic trigger element disposed on the inner wall of the transmitting coil module. The position of the elastic trigger element corresponds one-to-one with the heat dissipation holes on the magnetic core assembly. In its natural state, the end of the elastic trigger element protrudes relative to the inner wall of the transmitting coil module. When the lifting platform descends, the magnetic core assembly descends synchronously. During the descent, the inner wall of the magnetic core assembly first compresses the end of the elastic trigger element to store energy. When the heat dissipation hole descends to face the elastic trigger element, the elastic trigger element releases energy and springs into the heat dissipation hole to clear blockages.

[0006] In one embodiment, the inner ring of the transmitting coil module is provided with an upwardly protruding annular guide protrusion, and the magnetic core assembly is slidably sleeved on the annular guide protrusion via a slide rail structure. The annular guide protrusion is provided with a plurality of mounting holes arranged in an annular array, which are opposite to each of the heat dissipation holes.

[0007] In one embodiment, the elastic trigger includes a spring filled in each of the mounting holes and a cleaning bead mounted on the front end of the spring, the diameter of the cleaning bead being smaller than the diameter of the heat dissipation hole.

[0008] In one embodiment, an arc-shaped mounting plate is fixed to the rear end of the spring. The arc-shaped mounting plate is fixed to the inner wall of the annular guide protrusion of the inner ring of the transmitting coil module to confine the spring within the mounting hole. Both the arc-shaped mounting plate and the cleaning bead have air passages that communicate with each other, and the two air passages communicate with each other through the inner diameter hole of the spring.

[0009] In one embodiment, the cleaning bead is a steel bead or a ceramic bead, and the inner end of the heat dissipation hole is provided with an arc-shaped relief surface. When the heat dissipation hole descends to coincide with the corresponding cleaning bead, the cleaning bead is ejected into the corresponding heat dissipation hole by the arc-shaped relief surface.

[0010] As one embodiment, it also includes a ceramic plate fixed to the top surface of the housing, and the guide post is vertically fixed to the ceramic plate.

[0011] In one embodiment, the guide post includes a left guide post and a right guide post arranged symmetrically on the left and right sides, and the lifting seat is simultaneously slidably fitted onto the left guide post and the right guide post.

[0012] In one embodiment, the reset spring is disposed between the lifting seat and the ceramic plate, and is sleeved on the left guide post and the right guide post.

[0013] In one embodiment, the first linkage mechanism further includes a torsion spring reset member, which is disposed between the connection section between the housing and the power adjustment plate and the power adjustment plate. When the pressure seat rises with the lifting seat, the torsion spring reset member drives the power adjustment plate to reset.

[0014] The advantages of this invention compared to existing technologies are as follows: Addressing the challenges of heat dissipation and significant weight variations in large-sized wireless charging devices such as tablets, laptops, and smart speakers, this invention utilizes a guide column, a lifting seat, a first linkage mechanism, and a second linkage mechanism. When the device to be charged is placed on the charging surface, its gravity drives the lifting seat downwards along the guide column, simultaneously triggering two functions: the first linkage mechanism rotates the power adjustment plate, automatically increasing the transmission power according to the device's weight—the heavier the device, the higher the power, avoiding overheating from lighter devices or slow charging from heavier devices; the second linkage mechanism causes an elastic trigger element to spring into the heat dissipation holes of the magnetic core assembly, simultaneously clearing blockages and effectively solving the problems of heat dissipation hole blockage and overheating risks caused by large coverage areas. After the device is removed, a reset spring automatically returns all components to their original positions, and the transmission power decreases accordingly. Therefore, by simultaneously achieving adaptive power matching and automatic cleaning of heat dissipation holes, the structure is compact, requires no electronic sensors, and is particularly suitable for wireless charging scenarios involving large-sized devices, significantly improving charging safety, efficiency, and user experience. Attached Figure Description

[0015] Figure 1 This is a top view schematic diagram of the present invention; Figure 2 This invention is by Figure 1 A schematic diagram of the front view after sectioning A. Figure 3 This invention is by Figure 2Enlarged schematic diagram of section B; Figure 4 This is a schematic diagram of the first perspective from a three-dimensional perspective of the present invention; Figure 5 This is a schematic diagram of the second perspective from a three-dimensional perspective of the present invention; Figure 6 This is a partial side view of the present invention.

[0016] In the diagram: 1. Housing; 2. Guide post; 3. Lifting seat; 4. Magnetic core assembly; 5. Power adjustment plate; 6. Transmitting coil module; 7. Heat dissipation hole; 8. Lifting rod; 9. Drive rod; 10. Pressure seat; 11. Elastic trigger; 12. Spring; 13. Cleaning bead; 14. Arc-shaped clearance surface; 15. Ceramic plate; 16. Left guide post; 17. Right guide post; 18. Return spring; 19. Torsion spring return element; 20. Annular guide protrusion; 21. Assembly hole; 22. Arc-shaped mounting piece; 23. Air passage; 24. Drive wrench; 25. First linkage mechanism; 26. Second linkage mechanism. Detailed Implementation

[0017] The above and other embodiments and advantages of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0018] In one implementation, such as Figures 1-6 As shown: This embodiment provides a magnetic core embedded wireless charging transmitter, particularly suitable for large electronic devices such as tablets, laptops, or smart speakers. The device includes a housing 1, a transmitting coil module 6 and a magnetic core assembly 4 disposed above the housing 1. The transmitting coil module 6 and the magnetic core assembly 4 form an electromagnetic conversion area with the control circuit within the housing 1. The transmitting coil module 6 and the magnetic core assembly 4 are provided with several heat dissipation holes 7 communicating with the electromagnetic conversion area. It also includes a lifting base 3, a first linkage mechanism 25, a second linkage mechanism 26, and a return spring 18. The lifting base 3 carries the device to be charged and can move downwards under the weight of the device. The first linkage mechanism 25 is connected to the lifting base 3 and is used to adjust the transmitting power within the housing 1 when the lifting base 3 moves downwards. The second linkage mechanism 26 is connected to the lifting base 3 and is used to clear the heat dissipation holes 7 when the lifting base 3 moves downwards. The return spring 18 is used to reset the lifting base when the device is removed. The first linkage mechanism 25 and the second linkage mechanism 26 are configured to be synchronously driven by the same downward movement of the lifting base 3. The magnetic core embedded wireless charging transmitter includes a housing 1. Two power leads branch out from the housing 1, connecting to the transmitting coil module 6 and the magnetic core assembly 4 respectively, forming an electromagnetic conversion area. Two power adjustment plates 5 are connected to the housing 1 via connecting sections and are respectively mounted on these two power paths. The control circuit inside the housing 1 is located at the coupling area corresponding to the magnetic core assembly 4. In use, the device to be charged, such as a tablet computer, is placed on the charging surface. Due to the large area covered by large-sized devices, the bottom of its central area rests on the top surface of the magnetic core assembly 4, while the outer area rests on the transmitting coil module 6. A guide post 2 is vertically mounted on the housing 1. A lifting seat 3 is slidably fitted onto the guide post 2. When the lifting seat 3 moves up and down, it drives the magnetic core assembly 4 to move up and down. A first linkage mechanism 25 is provided between the lifting seat 3 and the power adjustment plates 5.

[0019] In this embodiment, the first linkage mechanism 25 includes a lifting rod 8 fixed to the lifting seat 3, a drive rod 9 mounted on the lifting rod 8, and a pressure seat 10 disposed at the end of the drive rod 9. The drive rod 9 extends forward along the power lead to above the drive wrench 24 of the power adjustment plate 5 and is fixed with the pressure seat 10, which is located above the drive wrench 24 of the power adjustment plate 5. When the lifting seat 3 descends, the lifting rod 8 and the drive rod 9 drive the pressure seat 10 to press down the drive wrench 24, causing the power adjustment plate 5 to rotate. When the device to be charged sits on the magnetic core assembly 4, the weight of the device causes the magnetic core assembly 4 and the lifting seat 3 to descend, triggering the first linkage mechanism 25 to drive the power adjustment plate 5 to rotate, increasing the transmission power. The increase in transmission power is positively correlated with the weight of the device; that is, a heavier laptop will press down more, causing the power adjustment plate 5 to rotate at a larger angle, thereby outputting higher power. Conversely, a lighter tablet will press down less, outputting lower power. This mechanical power matching avoids the problems of overheating in light devices or slow charging in heavy devices, making it particularly suitable for applications where there are significant weight differences between large-sized devices. When the device leaves, the pressure on the magnetic core assembly 4 disappears, the first linkage mechanism 25 moves in the opposite direction, the power adjustment plate 5 rotates in the opposite direction, the transmission power decreases, and energy is saved.

[0020] Large devices, such as laptops, almost completely cover the charging surface when wirelessly charging, making the heat dissipation holes 7 on the magnetic core assembly 4 easily clogged by dust, fibers, or tiny foreign objects. Simultaneously, the device itself generates significant heat, and clogging these holes drastically worsens the thermal situation. To address this issue, a second linkage mechanism 26 is provided between the sliding surface of the magnetic core assembly 4 and the transmitting coil module 6. As the coupling area of ​​the magnetic core assembly 4 descends along the transmitting coil module 6, the second linkage mechanism 26 cleans the heat dissipation holes 7, pushing out any blockages. The second linkage mechanism 26 includes an elastic trigger 11 located on the inner wall of the transmitting coil module 6. The position of the elastic trigger 11 corresponds one-to-one with the heat dissipation holes 7 on the magnetic core assembly 4. When the lifting seat 3 descends, the elastic trigger 11 springs into the heat dissipation hole 7 to push out any blockages.

[0021] In another embodiment, the inner ring of the transmitting coil module 6 is provided with an upwardly protruding annular guide protrusion 20. The magnetic core assembly 4 is slidably sleeved on the annular guide protrusion 20 via a slide rail structure. The annular guide protrusion 20 is provided with a plurality of mounting holes 21 arranged in annular array, which are opposite to each heat dissipation hole 7. The elastic trigger 11 includes a spring 12 filled in each mounting hole 21 and a cleaning bead 13 installed at the front end of the spring 12. The diameter of the cleaning bead 13 is smaller than the diameter of the heat dissipation hole 7. An arc-shaped mounting piece 22 is fixed to the rear end of the spring 12. The arc-shaped mounting piece 22 is fixed to the inner wall surface of the annular guide protrusion 20 of the inner ring of the transmitting coil module 6 to restrict the spring 12 within the mounting hole 21. A communicating air passage 23 is provided between the arc-shaped mounting piece 22 and the cleaning bead 13. The air passage 23 communicates with the inner diameter hole of the spring 12.

[0022] After the elastic trigger 11 pops into the heat dissipation hole 7 to clear the blockage, the air passage 23 on it is coaxially connected with the heat dissipation hole 7, ensuring smooth airflow or heat transfer. Even if a small amount of debris enters the air passage, it can be blown out by the natural airflow, thus aiding in cleaning. For large-sized devices, keeping the heat dissipation holes clear is especially important due to the large amount of heat generated during charging.

[0023] In another embodiment, the cleaning bead 13 is a perforated steel ball or ceramic ball, and the arc-shaped relief surface 14 provided at the inner end of the heat dissipation hole 7 provides a smooth guide for the insertion of the cleaning bead 13.

[0024] In another embodiment, the base assembly includes a ceramic plate 15 fixed to the top surface of the housing 1, and a guide post 2 vertically fixed to the ceramic plate 15. The guide post 2 includes a left guide post 16 and a right guide post 17 symmetrically arranged, and the lifting seat 3 is simultaneously slidably fitted onto the left guide post 16 and the right guide post 17.

[0025] In another embodiment, the return spring 18 is disposed between the lifting seat 3 and the ceramic plate 15.

[0026] In another embodiment, the first linkage mechanism 25 further includes a torsion spring reset member 19, which is located between the connection section of the housing 1 and the power adjustment plate 5 and the power adjustment plate 5. When the pressure seat 10 rises with the lifting seat 3, the torsion spring reset member 19 drives the power adjustment plate 5 to reset.

[0027] The overall working principle is as follows: When the wireless charging transmitter is in standby mode, the magnetic core assembly 4 is in its highest position, supported by the lifting base 3, and the power adjustment plate 5 is in a lower transmission power position. When the device to be charged, such as a laptop, is placed on the charging surface, the weight of the device causes the magnetic core assembly 4 and the lifting base 3 to move downwards along the guide post 2. The downward movement is proportional to the weight.

[0028] First linkage mechanism 25: The lifting seat 3 descends, causing the lifting rod 8 and the drive rod 9 to move down. The pressure seat 10 presses down the drive wrench 24 of the power adjustment plate 5, causing the power adjustment plate 5 to rotate at a corresponding angle, increasing the transmission power to a level that matches the weight of the equipment.

[0029] Second linkage mechanism 26: When the magnetic core assembly 4 begins to descend, its heat dissipation hole 7 is momentarily aligned with the cleaning bead 13 on the transmitting coil module 6. The spring 12 then pushes the cleaning bead 13 into the heat dissipation hole 7, expelling any dust, fibers, or other blockages that may have accumulated inside. As the magnetic core assembly 4 continues to descend, the cleaning bead 13 returns under the action of the arc-shaped clearance surface 14. Because large-sized equipment covers a large area, the heat dissipation hole 7 is prone to clogging. Automatic cleaning each time the equipment is placed effectively maintains heat dissipation performance.

[0030] When the equipment is moved away, the reset spring 18 drives the lifting seat 3 to return to its original position, while the torsion spring reset component 19 drives the power adjustment plate 5 to rotate in the opposite direction, reducing the transmission power, and all components return to their initial state. During the upward movement of the magnetic core assembly 4, its heat dissipation hole 7 and the cleaning bead 13 on the transmitting coil module 6 are briefly aligned. The cleaning bead 13 then springs back into the heat dissipation hole 7, pushing out any dust, fibers, or other blockages that may have accumulated in the hole. It then retracts into the assembly hole 21 under the action of the arc-shaped clearance surface 14.

[0031] With the above structure, the present invention achieves the dual functions of automatically increasing power when placing heavy objects, automatically decreasing power when placing light objects, and automatically cleaning the heat dissipation holes each time it is placed, making it particularly suitable for wireless charging scenarios of large-size devices.

[0032] The above orientation references do not represent the specific orientations of each component in this implementation scheme. This implementation scheme is only for the convenience of describing the scheme and to make relative descriptions based on the orientations of the references. In reality, the specific orientations of each component are based on their actual installation and use, as well as the orientation descriptions that are customary to those skilled in the art. This is hereby stated.

[0033] The specific embodiments described above further illustrate the inventive purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. In particular, it should be noted that any modifications, equivalent substitutions, or improvements made by those skilled in the art within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A magnetic core embedded wireless charging transmitter, comprising a housing (1), a transmitting coil module (6) disposed above the housing (1), and a magnetic core assembly (4), wherein the transmitting coil module (6) and the magnetic core assembly (4) form an electromagnetic conversion area with a control circuit within the housing (1), and the transmitting coil module (6) and the magnetic core assembly (4) are provided with a plurality of heat dissipation holes (7) communicating with the electromagnetic conversion area, characterized in that, It also includes a lifting seat (3) and a reset spring (18). The housing (1) is provided with a vertically upward guide post (2). The lifting seat (3) is slidably fitted on the guide post (2). The lifting seat (3) is used to carry the device to be charged and can move down along the guide post (2) under the action of the device's gravity. The magnetic core assembly (4) is fixedly connected to the top of the lifting seat (3), and the coupling area of ​​the magnetic core assembly (4) is coaxially slidably engaged with the transmitting coil module (6). The reset spring (18) is located between the lifting seat (3) and the housing (1) and is used to reset the lifting seat (3) when the device is removed. It also includes a first linkage mechanism (25) and a second linkage mechanism (26). The first linkage mechanism (25) includes a lifting rod (8) fixed on the lifting seat (3), a drive rod (9) installed on the lifting rod (8), and a pressure seat (10) disposed at the end of the drive rod (9). When the lifting seat (3) moves downward, the pressure seat (10) presses down on the drive wrench (24) connected to the power adjustment plate (5) on the housing (1), causing the power adjustment plate (5) to rotate to adjust the transmission power output by the transmitting coil module (6) to the device to be charged, wherein the transmission power is positively correlated with the weight of the device. The second linkage mechanism (26) includes a lifting rod (8) fixed on the lifting seat (3), a drive rod (9) installed on the lifting rod (8), and a pressure seat (10) disposed at the end of the drive rod (9). The elastic trigger (11) on the inner wall of the module (6) is positioned in a way that corresponds one-to-one with the heat dissipation hole (7) on the magnetic core assembly (4). In its natural state, the end of the elastic trigger (11) protrudes relative to the inner wall of the transmitting coil module (6). When the lifting seat (3) descends, the magnetic core assembly (4) descends synchronously. During the descent, the inner wall of the magnetic core assembly (4) first compresses the end of the elastic trigger (11) to store energy. When the heat dissipation hole (7) descends to be directly opposite the elastic trigger (11), the elastic trigger (11) releases energy and springs into the heat dissipation hole (7) to clear blockages.

2. The magnetic core embedded wireless charging transmitter according to claim 1, characterized in that, The inner ring of the transmitting coil module (6) is provided with an upwardly protruding annular guide protrusion (20). The magnetic core assembly (4) is slidably sleeved on the annular guide protrusion (20) through a slide rail structure. The annular guide protrusion (20) is provided with a plurality of mounting holes (21) in an annular array, which are opposite to each of the heat dissipation holes (7).

3. The magnetic core embedded wireless charging transmitter according to claim 1, characterized in that, The elastic trigger (11) includes a spring (12) filled in each of the mounting holes (21) and a cleaning bead (13) mounted on the front end of the spring (12), the diameter of the cleaning bead (13) being smaller than the diameter of the heat dissipation hole (7).

4. The magnetic core embedded wireless charging transmitter according to claim 1, characterized in that, The rear end of the spring (12) is fixed with an arc-shaped mounting plate (22). The arc-shaped mounting plate (22) is fixed to the inner wall of the annular guide protrusion (20) of the inner ring of the transmitting coil module (6) to restrict the spring (12) within the assembly hole (21). Both the arc-shaped mounting plate (22) and the cleaning bead (13) are provided with air passages (23) that communicate with each other. The two air passages (23) communicate with each other through the inner diameter hole of the spring (12).

5. The magnetic core embedded wireless charging transmitter according to claim 1, characterized in that, The cleaning bead (13) is a steel ball or a ceramic ball. The inner end of the heat dissipation hole (7) is provided with an arc-shaped relief surface (14). When the heat dissipation hole (7) descends to coincide with the corresponding cleaning bead (13), the cleaning bead (13) is ejected into the corresponding heat dissipation hole (7) by the arc-shaped relief surface (14).

6. The magnetic core embedded wireless charging transmitter according to claim 1, characterized in that, It also includes a ceramic plate (15) fixed to the top surface of the housing (1), and the guide post (2) is vertically fixed on the ceramic plate (15).

7. The magnetic core embedded wireless charging transmitter according to claim 6, characterized in that, The guide post (2) includes a left guide post (16) and a right guide post (17) arranged symmetrically on the left and right sides, and the lifting seat (3) is simultaneously slidably fitted on the left guide post (16) and the right guide post (17).

8. The magnetic core embedded wireless charging transmitter according to claim 7, characterized in that, The reset spring (18) is located between the lifting seat (3) and the ceramic plate (15), and is sleeved on the left guide post (16) and the right guide post (17).

9. The magnetic core embedded wireless charging transmitter according to claim 1, characterized in that, The first linkage mechanism (25) further includes a torsion spring reset member (19), which is located between the connection section of the housing (1) and the power adjustment plate (5) and the power adjustment plate (5). When the pressure seat (10) rises with the lifting seat (3), the torsion spring reset member (19) drives the power adjustment plate (5) to reset.

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