Contact and wireless charging double-sided charger

Abstract

The utility model discloses a contact and wireless charging double-sided charger, which belongs to the technical field of electronic equipment charging, and comprises a shell, a mainboard, a magnet, an elastic needle and a wireless charging module, the two sides of the shell are respectively provided with a mainboard groove and a wireless charging groove to form a double-sided charging structure, the magnet is used for adsorbing equipment, the elastic needle is electrically connected with the mainboard, and the wireless charging module is electrically connected with the mainboard. The mainboard is integrated with a charging control chip. The shell is provided with a vent hole, an air outlet hole, an air duct and an air inlet hole and is matched with the fan to form a dual heat dissipation path; and accurate positioning of the equipment is realized by multiple groups of magnet modules. The wireless charging module comprises a magnetic isolation sheet, a magnetic gathering sheet, a temperature sensor and the like. According to the utility model, contact and wireless charging functions are integrated, different devices can be charged, charging flexibility, reliability and safety are improved through efficient heat dissipation, magnetic attraction positioning and intelligent control, the structure is compact, light and thin, and multi-scene charging requirements are met.

Description

Technical Field

[0001] This utility model relates to the field of electronic device charging technology, and in particular to a double-sided charger with contact charging and wireless charging functions. Background Technology

[0002] In the field of electronic device charging, the problem of traditional chargers having limited functionality is becoming increasingly prominent. They generally only support single-mode charging (contact charging or wireless charging), making it difficult to meet users' flexible needs for charging multiple devices in multiple scenarios. From a technical perspective, wireless charging relies on the principle of electromagnetic induction, while contact charging conducts current through physical contact. There is an inherent contradiction between the two in circuit design—the magnetic field of wireless charging can easily interfere with the stability of the contact current, and the metal structure of the contacts can also affect the distribution of the wireless magnetic field. Furthermore, the spatial layout of the two types of modules is often incompatible due to the volume conflict between the coil, magnetic core, and metal interface, and the circuit control logic is also difficult to support the parallel operation of the two modes.

[0003] In practical applications, this singularity leads to many limitations: in consumer scenarios, users cannot connect peripherals via contact points when using wireless charging; in industrial scenarios, contact interfaces are easily affected by environmental factors and fail, while wireless charging cannot meet the demand for rapid power replenishment.

[0004] Most chargers on the market are single-function designs, requiring users to carry multiple devices, increasing costs and making them inconvenient to carry. Furthermore, existing charging standards lack specifications for multi-mode compatibility, further hindering product innovation. In summary, existing chargers, due to their limited functionality, insufficient technical compatibility, and poor adaptability to various scenarios, can no longer meet diverse charging needs. There is an urgent need for a new device that integrates wireless and contact charging functions to improve charging flexibility, device compatibility, and user experience. This utility model addresses this pain point by proposing an innovative solution with a double-sided charging structure. It aims to solve the functional limitations of traditional chargers through a reasonable modular layout and technological integration. Utility Model Content

[0005] This utility model provides a double-sided charger with both contact points and wireless charging, aiming to achieve the following technical effects:

[0006] Dual-sided charging function: By integrating contact charging and wireless charging modules on both sides of the casing, it can meet the charging needs of different devices and improve space utilization.

[0007] High-efficiency heat dissipation: Through the design of ventilation holes, fans and air ducts, an air circulation path is formed to reduce the temperature during the charging process.

[0008] The equipment is securely fixed: the layout of multiple sets of magnet modules ensures stable adsorption of the charging equipment and avoids poor contact.

[0009] This utility model provides a dual-sided charger with both contact and wireless charging capabilities, including a housing, a motherboard, a magnet, a spring pin, and a wireless charging module. The housing has motherboard recesses and wireless charging recesses on both sides, respectively. The motherboard and wireless charging module are installed in these recesses to form a dual-sided charging structure. The magnet is installed in a magnet recess on the housing, and the spring pin is installed on the opposite side of the wireless charging module. The motherboard is electrically connected to the spring pin and the wireless charging module. This design integrates contact charging and wireless charging functions by placing the motherboard and wireless charging module on both sides of the housing, meeting users' needs for charging multiple devices in various scenarios. The magnet attracts charging devices, ensuring stable contact or wireless charging alignment, improving charging reliability. The spring pin serves as the contact charging interface, electrically connected to the motherboard, supporting high-power transmission for wired charging. The overall structure is compact, space-saving, and portable.

[0010] Further description of the aforementioned solution: Ventilation holes are provided between the motherboard recess and the wireless charging recess. The sides of the motherboard recess and the wireless charging recess are respectively provided with a first air inlet and a second air inlet, forming a passive heat dissipation channel, which can quickly dissipate the heat generated by the motherboard and the wireless charging module during charging, prevent the device from overheating, extend its service life, and ensure charging safety.

[0011] Optional: A fan is also installed inside the housing. The housing has an air outlet and an air duct. The air outlet communicates with the fan, and the fan communicates with the motherboard recess through the air duct. The fan draws air into the motherboard recess and wireless charging recess through the first air inlet and the second air inlet, and exhausts it through the air outlet, significantly improving heat dissipation efficiency. This is especially suitable for high-power charging scenarios, avoiding reduced charging efficiency or component damage due to overheating.

[0012] Further description of the aforementioned solution: The shell is a thin rectangle or circle, with a first cover plate and a second cover plate on each side, making it convenient for users to carry or place on a desktop.

[0013] Further description of the aforementioned solution: The housing is provided with several first magnet modules, distributed on both sides of the main board; the outer periphery and center of the wireless charging module are respectively provided with second and third magnet modules. The first magnet modules on both sides of the housing main board cooperate with the second and third magnet modules of the wireless charging module to enhance the adsorption stability of the device. During wireless charging, the magnets can automatically align with the phone coil, improving charging efficiency; during contact charging, the magnets ensure that the spring pins are in tight contact with the device interface, avoiding poor contact.

[0014] Further description of the aforementioned solution: The wireless charging module also includes a magnetic shielding sheet, a magnetic focusing sheet, a temperature sensor, and an LED strip. The magnetic shielding sheet and the magnetic focusing sheet optimize the magnetic field distribution of the wireless charging module, reduce magnetic leakage and energy loss, and improve wireless charging efficiency. The temperature sensor monitors the charging temperature in real time, and together with the heat dissipation system, prevents overheating risks and ensures device safety. The LED strip indicates the charging status through light, enhancing the user experience.

[0015] Further description of the aforementioned solution: The motherboard is electrically connected to external devices via a power cord or connector, and is compatible with multiple power supply methods.

[0016] Further description of the aforementioned solution: The motherboard integrates a charging control chip and a charging management module, which can intelligently adjust the charging voltage and current, realize overcharge, overcurrent, and overheat protection, and ensure charging safety; at the same time, it optimizes the charging process, improves charging efficiency, and extends the battery life of the device.

[0017] Compared with existing technologies, the contact and wireless charging double-sided charger provided by this utility model achieves multi-dimensional beneficial effects through innovative structural design and technology integration:

[0018] It achieves parallel compatibility of contact charging and wireless charging functions, breaking through the limitations of traditional chargers with single functions, and significantly improving charging flexibility and device compatibility.

[0019] The high-efficiency heat dissipation system forms a dual heat dissipation path of "active blowing + passive convection" through the coordinated design of ventilation holes, air inlets, air ducts and fans. It can quickly dissipate the heat generated by the motherboard and wireless charging module when working at high power, avoid overheating and damage of components, extend the service life of the device and improve charging safety, and is especially suitable for long-term continuous charging scenarios.

[0020] The magnetic positioning structure achieves automatic adsorption and precise alignment of the charging device through multiple sets of magnet modules between the housing and the wireless charging module. This ensures stable contact at the contact points or efficient coupling of the wireless charging coil, reducing charging efficiency loss or poor contact caused by positional misalignment, and improving user convenience and charging reliability.

[0021] Its compact and lightweight design, combined with intelligent integration, achieves multifunctionality while maintaining portability and aesthetics, meeting modern users' demands for "miniaturization, intelligence, and multifunctionality" in charging devices, and providing an innovative and practical solution for the field of electronic device charging. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 , 2 This is an overall schematic diagram of an embodiment of the present utility model;

[0024] Figures 3-6 An exploded view diagram provided for an embodiment of this utility model;

[0025] Figure 7 Another overall schematic diagram provided for an embodiment of this utility model;

[0026] Figure 8 This is a schematic diagram of airflow provided for an embodiment of the present invention.

[0027] The following are the labeling elements in the figure:

[0028] 1. Housing; 10. Air duct; 11. First cover plate; 12. Second cover plate; 13. Wireless charging groove; 14. Mainboard groove; 15. Magnet groove; 16. First air inlet; 17. Air outlet; 18. Second air inlet; 19. Ventilation hole; 2. Mainboard; 21. Spring pin; 3. First magnet module; 4. Second magnet module; 5. Wireless charging coil; 51. Magnetic shielding sheet; 52. Third magnet module; 6. Power cord; 7. Socket; 8. Fan.

[0029] The accompanying drawings have illustrated specific embodiments of the present invention, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0031] To make the technical solution and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0032] Please see Figures 1-8 As shown, in this embodiment, the housing 1 serves as the main support for the charger, employing a thin rectangular or circular structure with an overall thickness controlled between 10-15mm, preferably 15mm, balancing portability and internal space rationality. The housing 1 consists of a two-layer split structure, including a first cover plate 11 and a second cover plate 12, which are fixed by precision snaps, adhesives, or welding, facilitating the installation and maintenance of internal components.

[0033] The housing 1 has a motherboard recess 14 and a wireless charging recess 13 on its two sides, forming a double-sided charging structure. The motherboard recess 14 is 3-5mm deep and is used to accommodate the motherboard 2 and its peripheral components; the wireless charging recess 13 is 4-6mm deep to accommodate the thickness requirements of the wireless charging module. A ventilation hole 19 is provided between the two recesses to connect the two spaces and form a heat dissipation channel.

[0034] The housing 1 has an air outlet 17 and an air duct 10 on its edge. The air outlet 17 is located on one side edge and aligned with the air outlet of the internal fan 8. One end of the air duct 10 is connected to the air inlet of the fan 8, and the other end extends to the bottom of the motherboard recess 14 and the ventilation hole, ensuring that the airflow drawn in by the fan 8 can directly act on the motherboard 2 area and the wireless charging module. The sides of the motherboard recess 14 and the wireless charging recess 13 are respectively provided with a first air inlet 16 and a second air inlet 18, which are arranged in an array to facilitate rapid airflow.

[0035] Motherboard 2 integrates charging control chips, such as the TI BQ25896, and a charging management module. Its surface is coated with conformal coating to enhance moisture and dust resistance. Motherboard 2 also features soldered spring-loaded connectors made of phosphor bronze with a gold-plated finish. The spring-loaded connectors are 5-8mm long and compatible with the charging interfaces of most mainstream electronic devices.

[0036] The motherboard 2 has a power cable 6 interface on one side, which can be connected to an external power source via power cable 6 or the built-in connector 7, such as a Type-C connector, and is compatible with various input specifications such as 5V / 2A and 9V / 2A. The motherboard 2 realizes intelligent regulation of input voltage through a charging control chip, and supports overcharge, overcurrent, and overheat protection functions. When abnormal current or temperature exceeds a threshold such as 70℃, the power output is automatically cut off.

[0037] The wireless charging module is installed in the wireless charging groove 13 on the other side of the housing 1, and includes a wireless charging coil 5, a magnetic shielding sheet 51, a magnetic focusing sheet, a temperature sensor, and an LED strip. In this embodiment, the wireless charging coil 5 is a 15W power-rated flat hollow coil with a diameter of 40-50mm, 50-60 turns, and an inductance of 5-8μH. Combined with the ferrite magnetic shielding sheet 51 and the nanocrystalline magnetic focusing sheet, the magnetic field is concentrated in the central area of ​​the coil, reducing magnetic leakage and improving charging efficiency.

[0038] The temperature sensor, an NTC thermistor, is attached to the back of the wireless charging coil 5 and connected to the motherboard 2 via a wire to monitor the charging temperature in real time. When the temperature exceeds 60℃, the motherboard 2 controls the wireless charging module to reduce its output power. The light strip is an RGB LED strip arranged along the edge of the wireless charging groove 13 and controlled by signals from the motherboard 2 to indicate the charging status using different colors.

[0039] In this embodiment, multiple sets of magnet modules are provided inside the housing 1 to achieve automatic adsorption and precise positioning of the charging device:

[0040] The first magnet module 3 is arranged in a rectangular array on both sides of the motherboard groove 14. It uses neodymium iron boron permanent magnets with a remanence of 1.2-1.4T. It is fixed to the magnet groove 15 of the housing 1 with epoxy resin glue, and maintains a safe distance from the edge of the motherboard 2 to avoid magnetic field interference with the circuit.

[0041] The second magnet module 4 is arranged in a ring around the outer periphery of the wireless charging module and aligned with the outer edge of the wireless charging coil 5. It is used to attract the metal frame or magnetic protective case of mobile phones and other devices, ensuring that the coil is aligned with the device receiver during wireless charging.

[0042] The third magnet module 52 is located at the center of the wireless charging module. It is cylindrical and works in conjunction with the magnetic attraction point at the center of the device to improve the attraction stability.

[0043] The three sets of magnet modules work together to generate an attraction force of 5-8N on the device, ensuring that the spring pin 21 is in close contact with the device interface when the contact is charging, and maximizing the coil coupling efficiency during wireless charging.

[0044] The charger employs a dual heat dissipation mechanism of "active blowing + passive convection," and the specific working process is as follows:

[0045] like Figure 8 As shown, the active heat dissipation path is as follows: Fan 8 is installed inside the air outlet 17 of housing 1. When the charger is working, fan 8 simultaneously draws in cool air through the first air inlet 16 and the second air inlet 18, which flows over the surface of motherboard 2 and the wireless charging coil, carrying away heat from the heat-generating components, and finally being discharged from the air outlet 17. This airflow direction can improve heat dissipation efficiency by drawing in cool air through two air inlets. Of course, in other embodiments, fan 8 can be reversed, with the air inlet becoming the air outlet and the air outlet becoming the air inlet, but the heat dissipation efficiency will decrease.

[0046] Passive heat dissipation path: During low-power charging, fan 8 automatically stops, relying on natural convection through ventilation holes 19 and exhaust vents for heat dissipation. The inner walls of the motherboard recess 14 and the wireless charging recess 13 are coated with a graphene thermal conductive coating with a thermal conductivity ≥1500W / (m·K), which quickly conducts heat to the surface of the casing 1 for dissipation.

[0047] Actual test data shows that under the load of 15W wireless charging, the maximum surface temperature of the shell 1 is ≤40℃, and the temperature of the core components is ≤60℃, which meets the requirements for long-term stable operation.

[0048] When the wireless charging module is working, the motherboard 2 controls the drive circuit of the wireless charging coil 5 through a PWM signal, supporting three power levels of 5W, 10W, and 15W, and is compatible with the Qi wireless charging standard. The temperature sensor signal is sampled by an ADC and then input to the MCU of the motherboard 2 to adjust the output power in real time; the LED strip signal is controlled through the GPIO interface to achieve status indication.

[0049] Based on the real-time temperature feedback from the temperature sensor, motherboard 2 controls the start / stop and speed of fan 8 through a MOSFET drive circuit. When the temperature is ≥50℃, fan 8 starts and runs at low speed; when the temperature is ≥57℃, it switches to high speed mode; when the temperature is <45℃, fan 8 stops to save energy.

[0050] This invention provides a novel charger that is multifunctional, stable in performance, portable, and easy to use, through the organic combination of a double-sided modular design, a high-efficiency heat dissipation system, a multi-magnet positioning structure, and intelligent control logic. Its technical solution breaks through the limitations of traditional chargers with their single function, improving charging efficiency, safety, and user experience, and possesses significant market application value and technological foresight. Those skilled in the art can adaptively adjust the shell shape, module parameters, etc., without departing from the core concept to meet the personalized needs of different scenarios.

[0051] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the foregoing claims.

[0052] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element present. Conversely, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations. The terms "upper end," "lower end," "left side," "right side," "front end," "rear end," and similar expressions used herein refer to the positional relationship with reference to the accompanying drawings.

[0053] It should be understood that this invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this invention is limited only by the appended claims.

Claims

1. A double-sided charger with contact points and wireless charging, characterized in that: The device includes a housing (1), a motherboard (2), a magnet, a spring pin (21), and a wireless charging module. The motherboard groove (14) and the wireless charging groove (13) are respectively opened on both sides of the housing (1). The motherboard (2) and the wireless charging module are respectively installed in the motherboard groove (14) and the wireless charging groove (13) on both sides of the housing (1) to form a double-sided charging structure. The magnet is installed in the magnet groove (15) of the housing (1). The spring pin (21) is installed on the opposite side of the wireless charging module. The motherboard (2) is electrically connected to the spring pin (21) and the wireless charging module.

2. The double-sided charger with contact points and wireless charging according to claim 1, characterized in that: A ventilation hole (19) is provided between the motherboard recess (14) and the wireless charging recess (13), and a first air inlet hole (16) and a second air inlet hole (18) are provided on the sides of the motherboard recess (14) and the wireless charging recess (13), respectively.

3. A double-sided charger with contact points and wireless charging according to claim 2, characterized in that: A fan (8) is also installed inside the housing (1). The housing (1) has an air outlet (17) and an air duct (10). The air outlet (17) is connected to the fan (8). The fan (8) is connected to the motherboard recess (14) through the air duct (10). The fan (8) draws air into the motherboard recess (14) and the wireless charging recess (13) through the first air inlet (16) and the second air inlet (18), and discharges it through the air outlet (17).

4. A double-sided charger with contact points and wireless charging according to claim 1, characterized in that: The shell (1) is a thin rectangle or circle, and a first cover plate (11) and a second cover plate (12) are respectively provided on both sides.

5. A double-sided charger with contact points and wireless charging according to claim 1, characterized in that: The housing (1) is provided with a plurality of first magnet modules (3), which are distributed on both sides of the main board (2); the outer periphery and the center of the wireless charging module are respectively provided with second magnet modules (4) and third magnet modules (52).

6. A double-sided charger with contact points and wireless charging according to claim 1, characterized in that: The wireless charging module also includes a magnetic shielding sheet (51), a magnetic focusing sheet, a temperature sensor, and a light strip.

7. A double-sided charger with contact points and wireless charging according to claim 1, characterized in that: The motherboard (2) is electrically connected to external devices via a power cord (6) or a connector (7).

8. A double-sided charger with contact points and wireless charging according to claim 1, characterized in that: The motherboard (2) integrates a charging control chip and a charging management module.

Images