Bluetooth earphone with multiple charging modes

Abstract

The utility model discloses a Bluetooth earphone with multiple charging modes, and relates to the technical field of Bluetooth earphone equipment. The earphone comprises a battery compartment and an earphone main body, the battery compartment is connected with the earphone main body through an ear hanging handle, a charging mainboard and a battery are arranged in the battery compartment, the charging mainboard is electrically connected with the battery, a charging port is arranged at the front end of the charging mainboard, and the charging port is exposed out of the battery compartment. The charging mainboard is provided with a protocol negotiation module, a step-down DC-DC module and a charging management module, and the charging end is arranged on the earphone battery compartment, so that when a charger is not carried, power can be directly supplied to the Bluetooth earphone through external equipment such as a mobile phone and the like, the lasting endurance of the Bluetooth earphone can be ensured, and better use experience is brought to a user.

Description

Technical Field

[0001] This utility model relates to a Bluetooth headset with multiple charging methods, and belongs to the field of Bluetooth headset technology. Background Technology

[0002] Most existing Bluetooth earphones are charged via data cable or charging case. Using a charging case not only makes it convenient to carry Bluetooth earphones but also helps to keep the earphones powered up at all times.

[0003] Although existing Bluetooth headset charging methods are relatively convenient, there are still situations where people forget to bring their chargers or fail to charge the charging case in time, resulting in the Bluetooth headsets being unusable due to low battery, which affects the user experience. Patent technology with announcement number CN119521065A discloses a Bluetooth headset charging device, which relates to the field of Bluetooth headset charging technology. It includes a wireless charging body and a wireless plug assembly. The side of the wireless charging body is connected to a damping shaft, the wireless plug assembly is connected to the end of the damping shaft, and the conductive plug is connected to a linkage pull cord at the end near the spring. This Bluetooth headset charging device eliminates the need for a data cable, solving the problem of tangled cables causing inconvenience during carrying and use. Furthermore, a sliding case allows for the removal of a power plug compatible with the socket. Pulling up the sliding case causes a spring to retract, automatically detaching any incompatible plugs from the plug slot, making room for replacement with compatible plugs. This addresses the issue of existing wireless chargers' plugs being incompatible with various socket shapes and sizes across different regions. While this significantly improves Bluetooth headset charging, it still doesn't prevent the charging case from running out of power when there's no charging socket. Therefore, this multi-charging Bluetooth headset design is proposed to address the problems of existing technologies. Utility Model Content

[0004] The purpose of this invention is to address the deficiencies or shortcomings in the existing technology by providing a Bluetooth headset with multiple charging methods. By setting a charging end on the headset's battery compartment, the headset can be directly powered by external devices such as mobile phones when a charger is not carried, thereby ensuring the Bluetooth headset's long battery life and providing users with a better user experience.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: it includes a battery compartment 1 and an earphone body 2. The battery compartment 1 is connected to the earphone body 2 via an ear hook. The battery compartment 1 is provided with a charging motherboard 5 and a battery 6. The charging motherboard 5 is electrically connected to the battery 6. The front end of the charging motherboard 5 is provided with a charging port 4, which is exposed outside the battery compartment 1. The charging motherboard 5 is provided with a protocol negotiation module 51, a step-down DC-DC module 52, and a charging management module 53.

[0006] Furthermore, the output terminal of the protocol negotiation module 51 is equipped with a charging protection module 54 and a filtering module 55 connected to a step-down DC-DC module 52.

[0007] Furthermore, the protocol negotiation module 51 adopts the STUSB4500 protocol chip.

[0008] Furthermore, the step-down DC-DC module 52 uses a TPS62130 step-down chip.

[0009] Furthermore, the charging management module 53 adopts the MCP73831 charging management chip.

[0010] Furthermore, the charging protection module 54 includes a TVS diode and a BQ2970 lithium battery protection chip. The TVS diode is located near the VBUS pin of the charging port 4, and the BQ2970 lithium battery protection chip is located between the output terminal of the MCP73831 charging management chip and the positive terminal of the battery 6, and is located close to the battery 6. The filtering module 55 is a π-type filter and is connected to the TVS diode and the step-down DC-DC module 52.

[0011] Furthermore, a protective cover 3 is provided at the bottom of the battery compartment 1. The protective cover 3 includes a cover body 31 and a connecting plate 32. The connecting plate 32 is provided on the side of the cover body 31 facing the battery compartment 1. A limiting groove 311 is provided on the side of the cover body 31 adjacent to the connecting plate 32. The limiting groove 311 matches the charging port 4. A snap-fit ​​block 321 is provided in the middle of the connecting plate 32.

[0012] Furthermore, the battery compartment 1 includes a front cover 11 and a rear cover 12. The front cover 11 and the rear cover 12 are detachably connected. The bottom of the front cover 11 is provided with a connecting groove 111 that matches the connecting plate 32, and the connecting groove 111 is provided with a mating groove that cooperates with the snap-fit ​​block 321.

[0013] Furthermore, the battery compartment 1 is also equipped with a wire 7 connecting the battery 6 and the earphone body 2.

[0014] After adopting the above technical solution, the beneficial effects of this utility model are as follows: by setting a charging end on the earphone battery case, the Bluetooth earphone can be directly powered by external devices such as mobile phones when no charger is carried, thereby ensuring the long battery life of the Bluetooth earphone and bringing a better user experience. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 yes Figure 1 The second angle view;

[0018] Figure 3 yes Figure 1 A diagram showing the state after removing protective cover 3;

[0019] Figure 4 yes Figure 3 The second angle view;

[0020] Figure 5 This is a schematic diagram of the structure of the protective cover 3 in this utility model;

[0021] Figure 6 This is a schematic diagram of the disassembled state of this utility model;

[0022] Figure 7 This is a schematic diagram of the charging principle of this utility model.

[0023] Explanation of reference numerals in the attached diagram: Battery compartment 1, Earphone body 2, Protective cover 3, Charging port 4, Charging main board 5, Battery 6, Wire 7, Front cover 11, Back cover 12, Cover body 31, Connecting plate 32, Protocol negotiation module 51, Step-down DC-DC module 52, Charging management module 53, Charging protection module 54, Filtering module 55, Connecting slot 111, Limiting slot 311, Snap-fit ​​block 321. Detailed Implementation

[0024] See Figures 1-7As shown, the technical solution adopted in this specific embodiment is as follows: It includes a battery compartment 1 and an earphone body 2. The battery compartment 1 is connected to the earphone body 2 via an ear hook. The battery compartment 1 is provided with a charging motherboard 5 and a battery 6. The charging motherboard 5 is electrically connected to the battery 6. The front end of the charging motherboard 5 is provided with a charging port 4, which is exposed outside the battery compartment 1. Traditional Bluetooth earphones are usually charged directly with a charger or placed in a charging compartment for charging. When there is no charging cable or the charging compartment is out of power, they cannot be charged, resulting in the Bluetooth earphones not being usable for a long time. This embodiment illustrates a Bluetooth earphone structure that uses a charger for direct charging. It can not only be charged directly with a charger, but also be reverse charged by external devices such as mobile phones. That is, a charging port is provided at the bottom of the battery compartment. In this embodiment, it is shown as a TYPE-C USB port. In other embodiments, Lightning, Micro-USB, and USB ports can be used. When there is no charger, the charging port can be connected to an external device for charging, such as a mobile phone or tablet. This allows for convenient emergency charging, thereby solving the battery anxiety of Bluetooth earphones and bringing a better user experience.

[0025] Specifically, the charging motherboard 5 is equipped with a protocol negotiation module 51, a step-down DC-DC module 52, and a charging management module 53. The protocol negotiation module can communicate with the mobile phone to enable reverse charging of the Bluetooth headset by the mobile phone or other devices. The step-down DC-DC module reduces the voltage during the charging process to obtain a charging voltage that matches the battery and will not damage the battery. The charging management module controls the charging current and charging temperature and integrates overcharge protection to prevent accidental overcharging from damaging the battery. The coordinated action of the three modules enables charging and protection of the Bluetooth headset, thereby effectively improving the battery life of the Bluetooth headset. This allows users to use the original charging device to charge the Bluetooth headset in emergencies, providing a better user experience.

[0026] More specifically, the output of the protocol negotiation module 51 is equipped with a charging protection module 54 and a filtering module 55 connected to a step-down DC-DC module 52. In this embodiment, to ensure normal charging, a charging protection module and a filtering module are provided. The charging protection module 54 includes a TVS diode and a BQ2970 lithium battery protection chip. The TVS diode is located near the VBUS pin of the charging port 4. The BQ2970 lithium battery protection chip is located between the output of the MCP73831 charging management chip and the positive terminal of the battery 6, and is located close to the battery 6. The core functions of the TVS diode include: 1. Overvoltage protection, clamping the abnormal voltage of the VBUS pin of the mobile phone Type-C interface (such as electrostatic discharge ESD, lightning surge), preventing the output voltage of the mobile phone from exceeding the withstand voltage range of the headphone circuit (such as the TVS clamping voltage ≤6.5V under a 5V system).

[0027] 2. Surge absorption: When the fast charging protocol negotiation fails (such as a voltage surge), it absorbs transient energy. By connecting a TVS diode, it can effectively achieve overvoltage protection and improve charging safety.

[0028] The filter module 55 is a π-type filter, connected to the TVS diode and the step-down DC-DC module 52. The filter module is a key circuit part of the charging circuit. It adopts a π-type filter, including a 10μH inductor and a 100μF capacitor, and is configured as a CLC. It can eliminate high-frequency switching noise generated by mobile phone fast charging protocols, such as PD / QC, such as 200kHz–3MHz, and prevent EMI (electromagnetic interference) from affecting other devices, such as the headphone Bluetooth module. In addition, the mobile phone output voltage may have ripple below 50mV, such as the switching frequency noise of the switching power supply. After filtering, the output is more stable. When the mobile phone is reverse powered, it absorbs transient voltage spikes, such as the voltage jump of USB PD negotiation, resulting in better charging and usage performance.

[0029] More specifically, the protocol negotiation module 51 uses the STUSB4500 protocol chip. In this embodiment, the protocol negotiation module uses the STUSB4500 protocol chip, which supports USB PD 3.0, automatically switches between SINK / SOURCE modes, has built-in CC logic control, is compatible with Type-C interfaces, and provides smoother charging adaptation.

[0030] More specifically, the step-down DC-DC module 52 uses the TPS62130 step-down chip.

[0031] More specifically, the charging management module 53 uses the MCP73831 charging management chip. The use of the MCP73831 charging management chip can better manage the charging current and temperature of the lithium battery. At the same time, the chip also integrates overcharge protection, which can better protect the battery and extend its service life.

[0032] More specifically, the bottom of the battery compartment 1 is provided with a protective cover 3. In this embodiment, the protective cover is not only a key component that is electrically connected to the charging port, but also a conductive component when the charging compartment is charging normally, so that the charging compartment can charge the battery normally through the charging port. It is also a protective structure for the charging port. When the phone needs to be reverse charged, the protective cover can be pulled out and put back on to be placed back into the charging compartment for charging.

[0033] More specifically, the protective cover 3 includes a cover body 31 and a connecting plate 32. The connecting plate 32 is disposed on the side of the cover body 31 facing the battery compartment 1. A limiting groove 311 is provided on the side of the cover body 31 adjacent to the connecting plate 32. The limiting groove 311 matches the charging port 4. The limiting groove is a slot end that matches the charging port. In this embodiment, it is a TYPE-C slot end. When not charging, the charging port is inserted into the limiting groove, and the connecting plate is inserted into the battery compartment. The bidirectional insertion structure ensures the firmness of the connection.

[0034] A snap-fit ​​block 321 is provided in the middle of the connecting plate 32, which can better connect the protective cover and the battery compartment.

[0035] More specifically, the battery compartment 1 includes a front cover 11 and a rear cover 12. The front cover 11 and the rear cover 12 are detachably connected. The bottom of the front cover 11 is provided with a connecting groove 111 that matches the connecting plate 32. The connecting groove 111 is provided with a mating groove that matches the snap-fit ​​block 321. By providing the connecting groove and the mating groove on the front cover, the protective cover is connected and fixed to the battery compartment to prevent it from falling off accidentally.

[0036] More specifically, the battery compartment 1 is also equipped with a wire 7 that connects the battery 6 to the headphone body 2.

[0037] The working principle of this utility model is as follows: When not in use, the protective cover 3 is connected to the battery compartment 1 to protect the charging port 4. When normally connected to the charger, the protocol negotiation module 51 is in the normal charging protocol mode. When there is no charger and charging is urgently needed, the protective cover 3 is pulled out and the charging port 4 is inserted into the mobile phone charging interface. The protocol negotiation module 51 communicates with the mobile phone to negotiate the power supply mode (SINK mode). At this time, mobile phones and other devices that support reverse charging can start charging the Bluetooth headset. During the charging process, the charging protection module 54 monitors the voltage and current throughout the charging process to protect the entire charging circuit and prevent overvoltage and overcurrent. The step-down DC-DC module 52 further reduces the voltage synchronously according to the protocol negotiation result, reducing the 5V-9V voltage output by the mobile phone to match the voltage of the battery 6. The charging management module 53 starts to output to charge the battery 6. The two charging modes can be flexibly switched through the protocol negotiation module 51 to ensure that the Bluetooth headset can have a long battery life.

[0038] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A multi-charging mode Bluetooth earphone, characterized in that: It includes a battery compartment (1) and an earphone body (2). The battery compartment (1) is connected to the earphone body (2) via an ear hook. The battery compartment (1) is equipped with a charging motherboard (5) and a battery (6). The charging motherboard (5) is electrically connected to the battery (6). The front end of the charging motherboard (5) is equipped with a charging port (4), which is exposed outside the battery compartment (1). The charging motherboard (5) is equipped with a protocol negotiation module (51), a step-down DC-DC module (52), and a charging management module (53).

2. The multi-charging mode Bluetooth earphone according to claim 1, characterized in that: The output terminal of the protocol negotiation module (51) is equipped with a charging protection module (54) and a filtering module (55) connected to a step-down DC-DC module (52).

3. The multi-charging mode Bluetooth earphone according to claim 1, characterized in that: The protocol negotiation module (51) uses the STUSB4500 protocol chip.

4. The multi-charging mode Bluetooth earphone according to claim 1, characterized in that: The step-down DC-DC module (52) uses the TPS62130 step-down chip.

5. The multi-charging mode Bluetooth earphone according to claim 1, characterized in that: The charging management module (53) uses the MCP73831 charging management chip.

6. A Bluetooth headset with multiple charging methods according to claim 2, characterized in that: The charging protection module (54) includes a TVS diode and a BQ2970 lithium battery protection chip. The TVS diode is located near the VBUS pin of the charging port (4). The BQ2970 lithium battery protection chip is located between the output terminal of the MCP73831 charging management chip and the positive terminal of the battery (6), and is located close to the battery (6). The filtering module (55) is a π-type filter and is connected to the TVS diode and the step-down DC-DC module (52).

7. The multi-charging mode Bluetooth earphone according to claim 1, characterized in that: The battery compartment (1) is provided with a protective cover (3) at the bottom. The protective cover (3) includes a cover body (31) and a connecting plate (32). The connecting plate (32) is located on the side of the cover body (31) facing the battery compartment (1). A limiting groove (311) is provided on the side of the cover body (31) adjacent to the connecting plate (32). The limiting groove (311) matches the charging port (4). A snap-fit ​​block (321) is provided in the middle of the connecting plate (32).

8. The multi-charging mode Bluetooth earphone according to claim 1, characterized in that: The battery compartment (1) includes a front cover (11) and a rear cover (12). The front cover (11) and the rear cover (12) are detachably connected. The bottom of the front cover (11) is provided with a connecting groove (111) that matches the connecting plate (32), and the connecting groove (111) is provided with a mating groove that matches the snap-fit ​​block (321).

9. The multi-charging mode Bluetooth earphone according to claim 1, characterized in that: The battery compartment (1) is also provided with a wire (7) to connect the battery (6) and the headphone body (2).

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