Earphone

Abstract

The utility model relates to an earphone, which comprises a battery compartment and an external FM (Frequency Modulation) antenna module, the battery compartment is provided with an accommodating groove and a flip cover; a control mainboard is arranged in the battery compartment, is communicated with a mobile phone applet through Bluetooth and is pre-stored with an FM broadcast channel called by the applet; the external FM antenna module comprises a wired earphone serving as an antenna body, a multifunctional data interface is integrated on the control mainboard, the wired earphone is provided with a connecting end capable of being connected with the multifunctional data interface, and the control mainboard receives an FM broadcast signal through the wired earphone, converts the FM broadcast signal into an audio signal and outputs the audio signal to the wired earphone; the outer side wall of the battery compartment is provided with a one-key calling key for calling a pre-stored FM broadcast channel to the wired earphone by one key for playing, and the one-key calling key is electrically connected with the control mainboard; according to the utility model, the overall volume is small, the carrying is convenient, the external antenna module is convenient for examinees to adjust the position and direction temporarily, the stability of signals is ensured, and the function of calling pre-stored channels by one key is also realized.

Description

Technical Field

[0001] This utility model relates to the field of headphone technology, and in particular to a headphone. Background Technology

[0002] The National College English Test (CET) for Level 4 and 6 is a large-scale standardized test. Currently, the FM radio headphones used in the CET-4 and CET-6 listening tests are over-ear headphones. These headphones are bulky, inconvenient to carry, and are essentially unusable after the exam. Furthermore, when using these headphones, test takers are seated and cannot easily adjust the antenna position and direction to optimize FM reception while testing or answering questions.

[0003] To address the shortcomings of existing over-ear headphones, the inventor previously proposed a further solution (patent application number 202420650412.9). Although this solution solved the two major drawbacks of over-ear headphones—large size and immobile antenna—the overall solution was not optimized enough and still had several shortcomings. In particular, the built-in antenna, the ear-hook structure, and the numerous operation buttons required further optimization. The built-in antenna required more installation space, the ear-hook structure was relatively large, and the multiple buttons required a larger PCB board. These three factors all increased the overall size of the headphones, making them inconvenient to carry. Moreover, adjusting channels required operating multiple buttons, which was quite cumbersome. Therefore, it is necessary to propose a smaller, more convenient, portable, and easier-to-use headphone. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing an earphone that can effectively solve the aforementioned problems.

[0005] To achieve the above requirements, the technical solution adopted by this utility model to solve its technical problem is as follows:

[0006] An earphone is provided, including a battery case and an external FM antenna module; the battery case has a receiving slot for accommodating the wireless earphone body and a flip cover covering the receiving slot; the battery case is provided with a control motherboard, which can communicate with a mobile phone applet via Bluetooth and pre-store FM broadcast channels called from the applet;

[0007] The external FM antenna module includes a wired earphone as the antenna body. The control motherboard integrates a multi-functional data interface. The wired earphone has a connection end that can be connected to the multi-functional data interface. The control motherboard receives FM broadcast signals through the wired earphone and converts them into audio signals for output to the wired earphone.

[0008] The outer wall of the battery compartment is provided with a one-button call button that allows a pre-stored FM radio channel to be played on the wired headphones. The one-button call button is electrically connected to the control motherboard.

[0009] The earphone of this utility model includes an external FM antenna module that further includes adjustment buttons on the wire of the wired earphone for adjusting the audio and FM radio channels; at least two adjustment buttons are provided.

[0010] The earphones of this invention include an integrated frequency modulation circuit on the control motherboard for converting received FM broadcast signals into audio signals and outputting them to the multi-function data interface. The wired earphones are connected to the frequency modulation circuit through the multi-function data interface.

[0011] The earphones described in this utility model further include an isolation circuit integrated on the control motherboard to separate the FM broadcast signal and the audio signal, preventing the broadcast signal from interfering with the audio signal.

[0012] The earphone of this invention has an isolation circuit that is an LC filter circuit used to isolate signals with frequencies of 50 to 108 MHz.

[0013] The earphones of this utility model, wherein the control motherboard further integrates a scanning unit for periodically scanning and detecting the connection status of the multi-functional data interface, and when the control motherboard detects that the wired earphones are disconnected from the multi-functional data interface, it cuts off the frequency modulation circuit.

[0014] The earphones of this utility model include a battery compartment containing a storage battery, and the control motherboard is electrically connected to the storage battery and charges and discharges it through the multi-functional data interface.

[0015] The earphones described in this utility model have a TYPE-C interface for their multi-functional data interface.

[0016] The advantages of this utility model are as follows: This utility model has a small overall size and is easy to carry. The external antenna module allows candidates to temporarily adjust the position and direction to ensure signal stability. For example, it can lift part of the headphone cable to keep it in a horizontal, vertical or tilted state to increase the signal contact area between the headphone cable and the channel, and ensure that the two are kept in a near-orthogonal angle range. In addition, it also has the function of one-click recall of pre-stored channels, making the operation simpler and more convenient.

[0017] When using this device, first plug the wired headphones into the multi-functional data interface. Then, use a mobile application, such as a WeChat mini-program, to adjust the desired channel while listening. Once the correct channel is selected, save it to the control board via the mini-program. After saving, you can continue using the wireless headphones to listen to music normally. When entering the examination room, you can use a one-click button to trigger the control board to retrieve the previously saved channel and listen to the exam listening content. If the signal is unstable during the pre-exam sound check, you can adjust the signal strength by lifting a section of the headphone cable, adjusting its length, direction, and tilt angle. After the exam, unplug the wired headphones, and you can then use the wireless headphones normally for listening to music or watching videos. Compared to existing headphones, this device is more practical. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. 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.

[0019] Figure 1 This is a schematic diagram of the workflow of this utility model.

[0020] Figure 2 This is a block diagram of the circuit structure of this utility model.

[0021] Figure 3 This is a block diagram showing the connection between the isolation circuit and the wired headphones of this utility model.

[0022] Figure 4 This is the isolation circuit diagram of this utility model.

[0023] Figure 5 The circuit diagram for power supply and audio output control of the TYPE-C structure of this utility model is shown.

[0024] Figure 6 This is a circuit diagram showing the frequency modulation circuit and the one-button call connection of this utility model.

[0025] Figure 7 This is the Bluetooth circuit diagram of this utility model. Detailed Implementation

[0026] The terms "first," "second," "third," and "fourth," etc., used in the specification, claims, and accompanying drawings of this utility model are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0027] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0028] "Multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0029] Furthermore, the terms indicating orientation, such as "up," "down," "left," "right," "upper end," "lower end," and "longitudinal," are all based on the posture and position of the device or equipment described in this solution during normal use.

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of this utility model. Obviously, the described embodiments are some, but not all, embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0031] The preferred embodiment of the earphones of this utility model, such as Figure 1-7As shown, the device includes a battery compartment 10 and an external FM antenna module 20. The battery compartment 10 has a receiving slot for accommodating the wireless earphone body and a flip cover covering the receiving slot. The wireless earphone body specifically includes button controls and indicator lights, as well as Bluetooth circuitry, individual batteries, and a speaker. The connections of these structures are existing technology and will not be described in detail here. The battery compartment 10 houses a control motherboard, which can communicate with a mobile app via Bluetooth and pre-store FM radio channels called from the app. The external FM antenna module 20 includes a wired earphone 201 as the antenna body. The control motherboard integrates a multi-function data interface 30, which can be any one of an Android interface, a Type-C interface, or a Lightning interface. The wired earphone 201 has a connector that can connect to the multi-function data interface 30, which can be a connector corresponding to one of the aforementioned interfaces. Furthermore, the control motherboard receives FM radio signals through the wired earphone 201 and converts them into audio signals. The signal output is sent to the wired earphone 201. Additionally, a one-button access button is located on the outer wall of the battery compartment 10 to play FM radio channels pre-stored on the control motherboard to the wired earphone 201. This button is electrically connected to the control motherboard. The earphone is small and portable. The external antenna module allows test-takers to temporarily adjust its position and direction to ensure signal stability. For example, a portion of the earphone cable can be supported to maintain a horizontal, vertical, or tilted position, increasing the signal contact area between the cable and the channel and ensuring they remain within a near-orthogonal angle range. Furthermore, it features a one-button access function to pre-stored channels, making operation simpler and more convenient.

[0032] When using the device, first plug the wired earphone 201 into the multi-functional data interface 30. Then, use a mobile application, such as a WeChat mini-program, to adjust the desired channel. The examinee can listen and adjust the channel simultaneously using the wired earphone 201. Once the desired channel is selected, save the channel to the control board via the mini-program. After saving, the wireless earphone can be used normally for listening to music. When the examinee enters the examination room, they can use a one-button control to retrieve the previously saved channel from the control board to listen to the exam listening comprehension content. If the signal is unstable during the pre-exam sound check, the signal strength can be adjusted by adjusting the length, direction, and tilt angle of the earphone cable. After the exam, the examinee unplugs the wired earphone 201, and the wireless earphone can then be used normally for listening to music or watching videos. Compared to existing earphones, this device offers greater practicality.

[0033] In this embodiment, the external FM antenna module 20 also includes adjustment buttons 202 on the wire of the wired earphone 201 for adjusting the audio and FM radio channels. There are at least two adjustment buttons 202, one of which is used to adjust the channel increase and the other is used to adjust the channel decrease. This function can be applied to situations where multiple channels are stored in the control motherboard to facilitate the user to select the required channel and further improve the practicality.

[0034] In this embodiment, the control motherboard integrates an FM circuit for converting the received FM radio signal into an audio signal and outputting it to the multi-function data interface 30. The wired earphone 201 is connected to the FM circuit through the multi-function data interface 30. The function is implemented by connecting the mobile phone to the earphone charging case via Bluetooth using the BLE protocol, using a WeChat mini-program to control the FM circuit to receive the FM signal, and after decoding by the FM chip, the audio signal is output to the TYPE-C connector through the Bluetooth circuit and then through the FM signal isolation circuit, connecting to the wired earphone 201 to listen to the radio station.

[0035] In this embodiment, the control motherboard also integrates an isolation circuit to separate the FM broadcast signal and the audio signal, preventing the broadcast signal from interfering with the audio signal. Specifically, the isolation circuit is an LC filter circuit. The FM signal isolation circuit is to avoid interference with the FM signal when the wired headset 201 with audio output multi-function data interface 30 is used as an antenna. The FM signal isolation circuit isolates the 50-108MHz frequency through an LC filter circuit with inductors and capacitors, reducing the absorption of FM wireless signals by the circuit and improving the sensitivity of the wired headset 201 as an FM antenna for receiving signals.

[0036] In this embodiment, the control motherboard also integrates a scanning unit for periodically scanning and detecting the connection status of the multi-function data interface 30. When the control motherboard detects that the wired headphones 201 are disconnected from the multi-function data interface 30, it cuts off the frequency modulation circuit. This scanning unit can use the crystal oscillator built into the control motherboard as the scanning clock, or it can use an external clock chip. Furthermore, a battery is also provided in the battery compartment 10. The control motherboard is electrically connected to the battery and charges and discharges it through the multi-function data interface. The multi-function data interface is a TYPE-C interface, and the TYPE-C 16-pin socket is as follows: Figure 2Pins 2 and 15VBUS, and pins 1 and 16GND, can charge the charging case. Pins 6SBU1 and 14SBU2 serve as the negative terminals for audio output, connected to ground via L8 of the FM signal isolation circuit, and are also used as FM antenna pins. Pins 4, 5, 12, and 13 are used for the left and right channel audio outputs of the FM signal, respectively. Pins 3, CC1, 11, and CC2 connect to the Bluetooth circuit and are used for detecting whether the headphones are plugged in and for overall upgrades. When wired headphones are detected, the Bluetooth circuit automatically turns on and controls the radio circuit to work via IIC, entering FM mode. When wired headphones are detected as unplugged, the Bluetooth circuit controls the FM circuit to turn off, reducing power consumption and improving the user experience.

[0037] The technical solution of this utility model is as follows: Wired earphones 201 and charging case 10 are connected to the charging case via a Bluetooth circuit and device through the BLE protocol. The Bluetooth device controls the charging case to adjust the frequency to receive FM signals transmitted by a broadcast via a WeChat mini-program, and can control the volume and store two radio stations. The charging case is connected to the broadcast station received by the TYPE-C wired earphone via a TYPE-C connector. After the charging case stores radio stations using the Bluetooth device, it can be used with the TYPE-C wired earphones. Pressing and holding the button on the charging case for 2 seconds switches between stored radio stations. A short press of the button on the charging case cycles the volume, and the buttons on the wired earphones can be used to operate the charging case's FM function to search for radio stations and adjust the volume. The FM received audio signal is listened to through the TYPE-C wired earphones. The TYPE-C wired earphones also function as an antenna for the FM circuit. The Bluetooth device can directly connect to the earphones to play Bluetooth audio via the Bluetooth audio protocol.

[0038] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. An earphone, characterized in that, It includes a battery compartment and an external FM antenna module; the battery compartment has a receiving slot for accommodating the wireless earphone body and a flip cover covering the receiving slot; the battery compartment is equipped with a control motherboard, which can communicate with a mobile phone applet via Bluetooth and pre-store FM broadcast channels called from the applet; The external FM antenna module includes a wired earphone as the antenna body. The control motherboard integrates a multi-functional data interface. The wired earphone has a connection end that can be connected to the multi-functional data interface. The control motherboard receives FM broadcast signals through the wired earphone and converts them into audio signals for output to the wired earphone. The outer wall of the battery compartment is provided with a one-button call button that allows a pre-stored FM radio channel to be played on the wired headphones. The one-button call button is electrically connected to the control motherboard.

2. The earphone according to claim 1, characterized in that, The control motherboard also integrates a scanning unit that periodically scans and detects the connection status of the multi-functional data interface. When the control motherboard detects that the wired headphones are disconnected from the multi-functional data interface, it cuts off the frequency modulation circuit.

3. The earphone according to claim 2, characterized in that, The control motherboard integrates a frequency modulation circuit for converting the received FM broadcast signal into an audio signal and outputting it to the multi-function data interface. The wired headphones are connected to the frequency modulation circuit through the multi-function data interface.

4. The earphone according to claim 3, characterized in that, The control motherboard also integrates an isolation circuit that separates the FM broadcast signal and the audio signal to prevent the broadcast signal from interfering with the audio signal.

5. The earphone according to claim 4, characterized in that, The isolation circuit is an LC filter circuit, used to isolate signals with frequencies of 50–108 MHz.

6. The earphone according to claim 1, characterized in that, The external FM antenna module also includes adjustment buttons on the wire of the wired earphone for adjusting the volume and adding or subtracting FM radio channels; there are at least two adjustment buttons.

7. The earphone according to claim 1, characterized in that, The battery compartment also contains a storage battery, and the control motherboard is electrically connected to the storage battery and charges and discharges it through the multi-functional data interface.

8. The headphones according to any one of claims 1-7, characterized in that, The multi-functional data interface is a TYPE-C interface.

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