Solar powered communication cap

Abstract

The utility model discloses a solar communication cap, including hat main body, solar cell panel, brim and elastic band, the brim is connected in hat main body front side, the solar cell panel is combined on the brim, the elastic band is connected in hat main body both ends, and with hat main body between the formation is adapted to the wearing space of human head. This communication cap realizes through the basic function of hat and wireless communication, noise reduction audio and solar charging technology combination, realizes the multifunctional integration of equipment, self -power supply and noiseless voice transmission, through structural innovation and function integration, solved the equipment dispersion, power shortage and environmental interference problem, significantly promoted the use convenience and user experience under multiple scenes.

Description

Technical Field

[0001] This utility model relates to the field of smart wearable technology, and in particular to a solar-powered communication cap. Background Technology

[0002] With the accelerating pace of life and increasing demand for convenient and multifunctional products, wearable devices integrating multiple functions have gained widespread attention. Traditional hats are single-function, offering only basic functions such as sun protection and warmth. However, during outdoor activities or daily outings, people often need to carry Bluetooth communication hats for listening to music, making and receiving calls, and may also need to use communication devices to stay in touch with others. Carrying these devices separately is not only cumbersome but also prone to loss and battery depletion. Therefore, there is a need for a device that integrates multiple functions and has self-charging capabilities to meet people's needs in different scenarios. Utility Model Content

[0003] In view of this, the present invention addresses the deficiencies of the existing technology and its main purpose is to provide a solar-powered communication hat. By combining the basic functions of the hat with wireless communication, noise reduction, and solar charging technology, it achieves multi-functional integration, self-powered operation, and noiseless voice transmission, thus solving the problems of inconvenience in carrying traditional devices, short battery life, and signal interference.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A solar-powered communication hat includes a hat body, a solar panel, a brim, and elastic straps. The brim is connected to the front of the hat body, and the solar panel is attached to the brim. The elastic straps are connected to both ends of the hat body and form a wearing space adapted to the human head.

[0006] As a preferred embodiment: a main unit is installed inside one end of the main body of the hat, and a slave unit is installed at the other end. The main unit and the slave unit are respectively equipped with a speaker, a battery and a communication unit; and the main unit and the slave unit are connected by a wire.

[0007] As a preferred embodiment: the main body of the hat includes a soft silicone sleeve made of waterproof soft silicone material and hard plastic boxes embedded at both ends of the soft silicone sleeve, and the main unit and the slave unit are respectively installed in the hard plastic boxes at both ends.

[0008] As a preferred embodiment, an antenna connected to the communication unit is provided on the front side of the brim.

[0009] As a preferred embodiment, the solar panels are distributed on the brim of the hat and located behind the antenna.

[0010] As a preferred embodiment, the elastic band includes an elastic band body and a silicone strip attached to the inner wall of the elastic band body.

[0011] As a preferred embodiment: the two ends of the hat body are respectively detachably connected to plugs for connecting the elastic straps, and the elastic straps are detachably connected to the plugs.

[0012] As a preferred embodiment: the plug includes a connecting body for connecting the elastic strap and a plug end for detachably engaging with the hat body; the elastic strap has connecting frames at both ends for engaging with the connecting body; the connecting body has a recess for accommodating the connecting frames, and two hook parts extending opposite to each other in the recess for hooking the connecting frames, with a clearance space between the rear sidewall of the recess and the two hook parts for the connecting frames; and an insertion port for the connecting frames to extend into is formed between the two hook parts; the connecting frames are detachably connected to the two hook parts via the insertion port.

[0013] As a preferred embodiment: the plug end includes two elastic plug arms, and plug interfaces are provided at both ends of the hat body corresponding to the plug end; and a locking part is provided at the front end of the two elastic plug arms for holding the elastic plug arms inside the plug interface.

[0014] As a preferred embodiment, the inner side of the hat body is detachably fitted with sweat-absorbing cotton, and the outer side has a logo fabric.

[0015] Compared with existing technologies, this utility model has significant advantages and beneficial effects. Specifically, as can be seen from the above technical solution, by combining the basic functions of a hat with Bluetooth communication, solar charging, and intelligent communication technology, it achieves multi-functional integration and self-powered operation, making it suitable for outdoor activities, sports, work, and tourist attractions. Its advantages include: multi-functional integration (hat, Bluetooth headset, and communication device combined into one, reducing carrying burden), self-charging and extended battery life (flexible solar panel and TYPE-C wired charging complement each other, ensuring continuous power supply outdoors), wearing comfort (lightweight structural design, detachable sweat-absorbing cotton, and breathable materials suitable for long-term use), efficient audio communication (dual-microphone beamforming noise reduction technology, RF networking supports stable transmission up to 100 meters, meeting the needs of noise-free scenic area explanations), and intelligent interaction (four-button control module and dual-color LED status indicators, achieving convenient operation and status visualization). This design effectively solves the problems of device dispersion, insufficient power, and environmental interference, improving user convenience and experience in multiple scenarios.

[0016] To more clearly illustrate the structural features and effects of this utility model, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0017] Figure 1 This is a first-view perspective three-dimensional schematic diagram of the communication cap of the present invention;

[0018] Figure 2 This is a second-view perspective three-dimensional schematic diagram of the communication cap of the present invention;

[0019] Figure 3 This is a third-view perspective stereoscopic diagram of the communication cap of the present invention;

[0020] Figure 4 This is a three-dimensional schematic diagram showing the elastic strap, plug, and hat body of the present invention separated;

[0021] Figure 5 This is a three-dimensional schematic diagram of the elastic strap and plug of the present invention.

[0022] Figure 6 This is a three-dimensional schematic diagram of the plug of the present invention;

[0023] Figure 7 This is an exploded perspective view of the communication cap of the present invention;

[0024] Figure 8 This is an exploded perspective view of the communication cap of the present invention;

[0025] Figure 9 This is a further exploded perspective view of the communication cap of the present invention;

[0026] Figure 10 This is a schematic diagram of the system principle of the present invention;

[0027] Figure 11 This is a schematic diagram of the system connection of the present invention.

[0028] Explanation of reference numerals in the attached diagram:

[0029] 10. Hat body; 11. Sweat-absorbing cotton; 12. Logo fabric; 13. Plug; 131. Connecting body; 132. Plug end; 133. Recess; 134. Hook; 135. Clearance space; 136. Inlet; 137. Elastic plug arm; 138. Locking part; 14. Plug interface; 15. Soft silicone sleeve; 16. Hard plastic box; 20. Solar panel; 30. Brim; 40. Elastic strap; 41. Elastic band; 42. Silicone strip; 43. Connecting frame; 50. Wearing space; 60. Main unit; 70. Slave unit; 80. Wire; 90. Antenna; 100. Button. Detailed Implementation

[0030] This utility model is as follows Figures 1 to 11 As shown, a solar-powered communication hat includes a hat body 10, a solar panel 20, a brim 30, and an elastic strap 40, wherein:

[0031] The main body 10 of the hat is made of lightweight, breathable, and relatively strong soft silicone material with waterproof backing. It uses a combination of soft and hard silicone for wrapping, with a central opening in the soft silicone sleeve. The left and right hard silicone modules (the main and slave communication modules) can be inserted into the silicone sleeve through this opening and secured via electronic wires. It is a composite material with breathable fabric. The surface bonding process uses adhesive-backed fabric to adhere to the soft silicone sleeve, rather than the traditional all-fabric sewing process. The sweat-absorbing cotton inside the head area uses a detachable Velcro design, allowing for replacement when soiled or smelly. The adjustable elastic straps are also removable and replaceable. A flexible solar charging panel is built into the brim, its shape conforming to the brim to effectively receive solar energy without compromising the hat's aesthetics and wearing comfort. The overall curvature and angle of the silicone sleeve are ergonomically designed. The communication module is integrated inside the hat near the top, using a built-in antenna for signal transmission and reception.

[0032] The brim 30 is connected to the front of the hat body 10, and the solar panel 20 is attached to the brim 30; the elastic strap 40 is connected to both ends of the hat body 10 to form a wearing space 50 adapted to the human head.

[0033] The inner side of the hat body 10 is detachably fitted with sweat-absorbing cotton 11, and the outer side has a logo fabric 12. The elastic strap 40 includes an elastic band 41 and a silicone strip 42 attached to the inner wall of the elastic band 41.

[0034] The hat body 10 has plugs 13 detachably connected to both ends for connecting the elastic straps, and the elastic straps are detachably connected to the plugs 13. Each plug 13 includes a connecting body 131 for connecting the elastic straps and a plug end 132 for detachably engaging with the hat body 10. Each end of the elastic strap has a connecting frame 43 for engaging with the connecting body 131. The connecting body 131 has a recess 133 for accommodating the connecting frame 43, and two hook portions 134 extending opposite to each other on the recess 133 for hooking the connecting frame 43. A clearance space 135 for the connecting frame 43 is formed between the rear sidewall of the recess 133 and the two hook portions 134. An insertion port 136 is formed between the two hook portions 134 for the connecting frame 43 to extend into. The connecting frame 43 is detachably connected to the two hook portions 134 via the insertion port 136. The plug end 132 includes two elastic plug arms 137, and plug interfaces 14 are provided at both ends of the hat body 10 corresponding to the plug end 132; and a locking part 138 is provided at the front end of the two elastic plug arms 137 for holding the elastic plug arms 137 inside the plug interface 14.

[0035] The hat body 10 has a main unit 60 inside one end and a slave unit 70 inside the other end. Both the main unit 60 and the slave unit 70 have speakers 120 installed within them, and are connected by a wire 80. An antenna 90 connected to the communication unit is located on the front side of the brim 30, positioned away from the body to reduce signal interference. The hat body 10 includes a waterproof soft silicone sleeve 15 and hard plastic boxes 16 embedded at both ends of the soft silicone sleeve 15. The main unit 60 and the slave unit 70 are correspondingly installed in the hard plastic boxes 16 at both ends. Solar panels 20 are distributed on the brim 30 and located behind the antenna 90.

[0036] The communication system based on this communication cap includes

[0037] The main body of the hat has a solar charging panel embedded in its brim;

[0038] The power supply unit includes a solar charging module, a charging management module, and a voltage protection module. The solar charging module includes a solar charging panel embedded in the brim for converting solar energy into electrical energy. The charging management module dynamically switches between solar charging and wired charging input paths. The voltage protection module monitors the charging and discharging voltage in real time.

[0039] The communication module includes a main control chip, a Bluetooth communication unit, a radio frequency communication unit, and a signal processing unit. The radio frequency communication unit integrates a radio frequency amplifier and a filter, and realizes voice signal transmission and reception through an external antenna. The signal processing unit works with the main control chip to eliminate communication interference.

[0040] The noise reduction audio unit includes a main microphone 17, a secondary microphone 18, a noise reduction algorithm module, and a speaker 120. The main microphone 17 and the secondary microphone 18 collect voice signals in a directional manner and suppress environmental noise through the noise reduction algorithm module. The speaker 120 receives and plays the processed audio signal.

[0041] The network control unit includes a first functional module and a second functional module. The first functional module amplifies the broadcast signal transmission range by signal amplification. The second functional module generates an independent number and embeds it into the broadcast signal. After the receiving end matches the number, it sends a confirmation message back to the main control chip.

[0042] The power supply unit provides graded regulated power to each module and unit. The main control chip coordinates the data interaction and operation of the communication module, noise reduction unit and network control unit through the system crystal oscillator synchronized clock signal.

[0043] The Bluetooth communication unit and the radio frequency communication unit share the external antenna; the external antenna is made of metal wire and is located on the edge of the hat brim away from the human body area.

[0044] The distance between the main microphone and the secondary microphone is 20-30mm, and the opening of the main microphone faces downward to the side, while the opening of the secondary microphone is located on the surface; the main microphone, the secondary microphone and the user's mouth are aligned in a straight line.

[0045] In the network control unit, an independent number is generated by the main control chip and encrypted and embedded in the broadcast signal to ensure the uniqueness of each first functional module. The first functional module enhances the broadcast signal transmission power through an RF amplifier and is assigned a unique independent number; the second functional module receives the independent number through a broadcast signal transceiver module and confirms it via voice broadcast; the network control unit disables Bluetooth communication in broadcast mode, and the second functional module needs to pair with the first functional module within a preset distance range.

[0046] The noise reduction frequency unit supports external microphone input, connects to the first functional module through an interface, and automatically switches to the external microphone signal acquisition mode.

[0047] The main body of the hat is equipped with a host and a slave device at both ends. The first and second functional modules are integrated into the host. The slave device is equipped with a battery 110, which is connected to the charging management module. The speaker 120 is provided in both the host and the slave device.

[0048] The main body of the hat adopts a structure in which a soft rubber sleeve wraps around a hard rubber module, and the internal sweat-absorbing cotton is detachably fixed to the inside of the main body of the hat; the solar charging panel is attached to the inside of the brim by a hot pressing process, and its shape is adapted to the curvature of the brim.

[0049] The voltage protection module is an overvoltage protection chip, which is linked with the charging management module to monitor the voltage status of battery 110 in real time.

[0050] The charging management module integrates a solar direct charging control circuit and a Type-C charging interface 19. The solar direct charging control circuit is connected to the solar charging module. When the Type-C charging interface 19 is connected, it takes priority over solar charging. The charging management module automatically switches to wired charging mode and limits the charging voltage through a voltage protection module. The switching of the input path between solar charging and Type-C charging is dynamically controlled by the charging management module in real time by monitoring the light conditions and interface access status.

[0051] A communication method applied to the communication system includes the following steps:

[0052] S1. The first functional module starts the broadcast mode through the networking button, activates the radio frequency amplifier to enhance the broadcast signal transmission, and generates an independent number to be embedded in the signal;

[0053] S2. The second functional module receives broadcast signals within a preset distance range, extracts independent numbers and matches and verifies them. After successful matching, it broadcasts confirmation information through a speaker.

[0054] S3, the noise reduction audio unit collects voice signals directionally through the main microphone and the secondary microphone. The noise reduction algorithm module suppresses environmental noise based on beamforming technology. The processed audio signal is played by the speaker.

[0055] S4. The power supply unit dynamically adjusts the charging mode according to lighting conditions:

[0056] When a Type-C interface is detected, the system prioritizes switching to wired charging and activates the voltage protection module to limit the charging voltage. When no Type-C interface is connected, the solar direct charging control circuit adjusts the charging power according to the light intensity.

[0057] S5, the main control chip synchronizes the clock signals of each module through the system crystal oscillator to ensure real-time coordination of the communication, audio processing and networking control units.

[0058] Solar charging system: A flexible solar charging panel, pressed into the brim, connects to the built-in charging management module and rechargeable battery, supporting 2W charging power in strong sunlight. The charging management module automatically adjusts the charging current and voltage to prevent overcharging and over-discharging, improving battery life and safety. In sufficient sunlight, the solar charging panel converts solar energy into electrical energy and stores it in battery 110, powering the communication cap and communication module. It also supports wired charging via a Type-C interface, with Type-C charging taking priority.

[0059] Bluetooth Communication Cap Features: The communication cap uses high-quality dynamic or balanced armature drivers, delivering excellent sound quality. It connects to smartphones, tablets, and other smart devices via Bluetooth for music playback, calls, and other functions. The cap also features noise cancellation, employing active or passive noise-canceling technology to reduce external noise interference and enhance the audio experience. The earcups are made of soft, sound-absorbing material, increasing wearing comfort and sound isolation.

[0060] Communication Functions: The communication module supports multiple communication protocols and can transmit signals within 100 meters. Users can make calls, send text messages, and receive voice messages through the operation buttons on the hat or the software interface after connecting to a mobile phone or other devices. The hat has built-in main and secondary microphones and a speaker 120. The main and secondary microphones are used to collect the user's voice, and the speaker 120 is used to play voice information, making it convenient for users to communicate when it is inconvenient to use a mobile phone. In particular, in the application scenario of tourist attractions, the tour guide communication hat supports a broadcast transmission mode, and the tourist communication hat supports a broadcast reception mode, realizing noise-free explanation of attractions.

[0061] The network control unit includes a signal amplification module and a broadcast signal transceiver module. The first functional module (guide communication cap) is equipped with the signal amplification module to enhance broadcast signal transmission. The second functional module (tourist communication cap) matches the unique number of the first functional module through the broadcast signal transceiver module and broadcasts confirmation. In broadcast mode, the network control unit automatically disables Bluetooth communication, and the main control chip shuts down the Bluetooth communication unit via an interrupt signal, ensuring that radio frequency communication has exclusive access to the transmission link.

[0062] System functional modules include a button control module, an LED status indicator module, and a system crystal oscillator. The button control module is used for switching operation modes, such as power on / off, volume adjustment, and network control. The LED status indicator module displays system status via dual-color lights, such as power on, power off, Bluetooth pairing, and broadcast mode. The system crystal oscillator provides a clock signal to synchronize the operation of all modules.

[0063] Noise reduction frequency unit: Includes a main microphone 17, a secondary microphone 18, and a noise reduction algorithm module. The distance between the main microphone 17 and the secondary microphone 18 is 20-30mm, with the opening of the main microphone 17 facing downwards to the side, and the opening of the secondary microphone 18 located on the surface, aligned in a straight line with the user's mouth. The noise reduction algorithm module uses beamforming technology to suppress ambient noise and dynamically adjusts the sound source directionality through the phase difference between the main and secondary microphones. It supports external dynamic microphone input, connecting to the first functional module via the Type-C charging port 19, and automatically switching to external microphone signal acquisition mode.

[0064] This microphone design has the following technical advantages:

[0065] 1. Spatial noise suppression optimization

[0066] The 20-30mm spacing between the main and secondary microphones is based on the spatial attenuation characteristics of sound wave wavelength and ambient noise. This distance ensures that the two microphones form an effective phase difference when receiving user voice (typical human voice frequency range 100Hz-8kHz corresponds to wavelengths of 34cm-4.25cm), while avoiding strong correlation between the two microphones due to ambient noise. Combined with noise reduction algorithms, it can accurately separate the target sound source from background noise.

[0067] 2. Directional speech enhancement

[0068] The main microphone 17 has its opening facing downwards on the side: directly aligned with the direction of sound wave radiation from the user's mouth (human voice mainly propagates along the chin), maximizing the strength of the target speech signal and reducing interference from ambient noise on the side.

[0069] The secondary microphone 18 has an opening located on the surface: it receives a wider range of sound field information, complements the main microphone 17, provides spatial acoustic feature data for beamforming algorithms, and enhances the dynamic adaptability of noise suppression.

[0070] Linear alignment design: Ensures that the two microphones and the sound source (mouth) are on the same axis, eliminating signal attenuation caused by angular offset and improving the signal-to-noise ratio of the voice signal.

[0071] 3. Environmental noise spectrum separation

[0072] The asymmetrical layout of the main and secondary microphones (lateral and surface-mounted) allows for differentiated capture of high-frequency noise (such as wind noise) and low-frequency vibrations (such as footsteps). Through frequency domain analysis and adaptive filtering, the system can selectively suppress different types of interference, maintaining speech intelligibility in complex sound fields (measured noise suppression ratio exceeding 15dB).

[0073] 4. Structural fit and wearing stability

[0074] The side opening design prevents airflow from directly impacting the microphone diaphragm, reducing airflow noise (such as "pop"). The surface secondary microphone fits snugly against the curved surface of the cap, reducing wind resistance noise. The linear arrangement, combined with ergonomics, ensures that the user can maintain the optimal pickup angle even when turning their head.

[0075] This design achieves highly robust voice interaction through innovative acoustic structure and algorithmic collaboration, making it particularly suitable for high-noise environments such as scenic spots and outdoor sports.

[0076] Power supply system: The slave unit is equipped with a rechargeable battery, with a total battery capacity of 110 mAh or more, not less than the preset capacity threshold (500mAh). It is also equipped with an overvoltage protection unit that works in conjunction with the charging management chip to monitor the battery voltage status in real time.

[0077] Manufacturing Process: The main body of the hat is made through cutting and sewing processes to ensure proper size and a sturdy structure. The flexible solar charging panel is fixed to the inside of the brim using a special adhesive hot-pressing process, ensuring a tight fit between the panel and the brim without affecting the panel's performance. The communication cap section uses injection molding to create the outer shell. Internal components such as the speaker unit and Bluetooth module are installed inside the outer shell through welding and assembly. The left and right injection-molded hard plastic shells are then assembled into a soft silicone sleeve. The silicone interior is filled with absorbent cotton, and the soft silicone surface is adhesively bonded to the fabric. The communication module's circuit board uses surface mount technology (SMT) for component mounting, then integrates the circuit board in a specific location inside the hat and connects it to other components via wires.

[0078] Instructions for use: First, put the solar-powered Bluetooth communication hat on your head. To use the Bluetooth communication function, press the power button on the hat. After pairing with your smart device via Bluetooth, you can play music or answer calls. To use the communication function, press the operation button on the hat to enter the communication interface. You can then make calls, send text messages, etc., using voice commands or the operation buttons. In sunny conditions, the solar panel automatically charges the built-in battery 110, requiring no additional user intervention. When the battery 110 is low on power, it can also be charged via an external power source.

[0079] In tourist attraction scenarios, tour guides can activate the broadcast transmission mode by pressing and holding the networking button for 3 seconds, with a transmission time of at least 5 hours. Tourists can activate the broadcast reception mode by pressing and holding the networking button for 3 seconds within a 5-meter straight-line distance. Upon successful reception, the tourist's communication cap will broadcast the number of the tour guide's transmitting communication cap and the tour guide's voice. The tourist's reception time can last up to 20 hours (when fully charged and without solar charging). Tourists can short-press the networking button to check the number of the tour guide's communication cap they have received. To re-receive, they can turn the broadcast reception mode off and on again. In broadcast mode, the Bluetooth function of the communication cap connecting to the mobile phone is disabled. Each tour guide communication cap has a unique and non-repeating serial number. If a tour guide communication cap is damaged, a new communication cap with a new serial number must be assigned, or the manufacturer must provide a new communication cap with the same serial number. The Bluetooth function of the communication cap connecting to the mobile phone is disabled when the communication cap enters broadcast transmission or reception mode.

[0080] The tour guide communication hat's Type-C port supports external microphone functionality. When an external microphone is connected, the noise reduction algorithm module automatically switches to the external signal processing link, retaining the environmental noise suppression function. In noisy environments, the external microphone can be plugged into the tour guide communication hat's Type-C charging port. The hat will then disable the built-in microphone and switch to the external microphone. When using the external microphone, tour guides should hold it as close to their mouth as possible to improve audio clarity and reduce ambient noise. It is recommended to use a low-sensitivity microphone, such as a dynamic microphone, for better ambient noise reduction. Only the tour guide communication hat supports the Type-C port external microphone function; tourist headphones do not support this function.

[0081] The key design feature of this invention is to integrate the basic functions of a hat with Bluetooth communication capabilities, communication functions, and solar charging capabilities, achieving multi-functional integration and self-powered operation. This allows for convenient use in outdoor activities, sports, work, and tourist attractions, solving the problems of inconvenience in carrying the device and insufficient battery power. It offers the following advantages:

[0082] Multifunctional integration: This design integrates the functions of a hat, Bluetooth communication hat, and communication device into one, eliminating the need for users to carry multiple separate devices, making it convenient for travel and use. It is particularly suitable for outdoor activities, sports, work, and tourist attractions, meeting the needs of diverse users.

[0083] Self-charging function: Utilizes solar power for charging, eliminating the need for an external power source. It provides continuous power to the device during outdoor activities, solving the problem of insufficient battery power and improving device usage time and convenience. It also supports Type-C wired charging to meet the needs of different charging conditions. The charging management module monitors the Type-C interface connection status in real time; if wired charging is detected, it immediately switches to the priority power supply mode.

[0084] Comfortable to wear: Made with lightweight materials and a reasonable structural design, it does not affect the normal wearing and use of the hat and is suitable for extended wear. The internal sweat-absorbing cotton is removable and replaceable to maintain hygiene and comfort.

[0085] Excellent audio and communication performance: High-quality communication cap unit and noise reduction function provide an outstanding audio experience, and the communication module supports multiple protocols to ensure stable and efficient communication connections. In tourist attraction applications, it enables noise-free explanations of attractions, enhancing the visitor experience.

[0086] Intelligent control and indication: Through the button control module and LED status indication module, users can easily operate and understand the working status of the equipment, improving the convenience and intuitiveness of use.

[0087] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A solar-powered communication cap, characterized in that: The hat includes a main body, a solar panel, a brim, and elastic straps. The brim is connected to the front of the main body, and the solar panel is attached to the brim. The elastic straps are connected to both ends of the main body and form a wearing space adapted to the human head.

2. The solar-powered communication cap according to claim 1, characterized in that: The main body of the hat has a main unit inside one end and a slave unit inside the other end. The main unit and the slave unit are respectively equipped with a speaker, a battery and a communication unit; and the main unit and the slave unit are connected by a wire.

3. The solar-powered communication cap according to claim 2, characterized in that: The main body of the hat includes a waterproof soft silicone sleeve and hard plastic boxes embedded at both ends of the soft silicone sleeve. The main unit and the slave unit are respectively installed in the hard plastic boxes at both ends.

4. The solar-powered communication cap according to claim 2, characterized in that: An antenna connected to the communication unit is provided on the front side of the brim.

5. The solar-powered communication cap according to claim 4, characterized in that: The solar panels are distributed on the brim and located behind the antenna.

6. The solar-powered communication cap according to claim 1, characterized in that: The elastic band includes an elastic band body and a silicone strip attached to the inner wall of the elastic band body.

7. The solar-powered communication cap according to claim 1, characterized in that: The hat body has detachable plugs at both ends for connecting the elastic straps, and the elastic straps are detachably connected to the plugs.

8. The solar-powered communication cap according to claim 7, characterized in that: The plug includes a connecting body for connecting the elastic strap and a plug end for detachably engaging with the hat body; the elastic strap has connecting frames at both ends for engaging with the connecting body; the connecting body has a recess for accommodating the connecting frames, and two hook parts extending opposite to each other in the recess for hooking the connecting frames, with a clearance space between the rear sidewall of the recess and the two hook parts for the connecting frames; and an insertion port for the connecting frames to extend into is formed between the two hook parts; the connecting frames are detachably connected to the two hook parts via the insertion port.

9. The solar-powered communication cap according to claim 8, characterized in that: The plug-in end includes two elastic plug-in arms, and plug-in interfaces are provided at both ends of the hat body corresponding to the plug-in end; and a locking part is provided at the front end of the two elastic plug-in arms for holding the elastic plug-in arms inside the plug-in interface.

10. The solar-powered communication cap according to claim 1, characterized in that: The hat has a detachable sweat-absorbing cotton on the inside and a logo fabric on the outside.

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