TWS bluetooth earphone with reduced noise influence

Abstract

This utility model discloses a TWS Bluetooth earphone with reduced noise impact, relating to the field of earphone technology. It includes an earphone shell and an earphone assembly. The earphone assembly is disposed within the earphone shell, which has a sound outlet. The earphone assembly includes a main control module, a speaker unit, a feedback microphone, a call microphone, and a feedforward microphone. The earphone shell includes a front shell, a middle shell, a rear shell, a first cavity, a second cavity, and a third cavity. A call pickup hole cooperating with the call microphone is opened on the rear shell or middle shell. The circuit board of the main control module is disposed within the third cavity, and an airflow damping component is disposed within the middle shell or rear shell. The three microphones work together to achieve active noise cancellation and environmental noise cancellation, effectively improving the earphone's noise reduction performance. Through a multi-stage expansion space formed by at least three sub-channels, the airflow energy is consumed through multi-stage expansion, thereby slowing down the airflow and reducing the airflow speed towards the call microphone, thus reducing wind noise.

Description

Technical Field

[0001] This utility model relates to the field of headphone technology, and in particular to a TWS Bluetooth headphone that reduces noise impact. Background Technology

[0002] As people's demands for call quality increase, noise-canceling headphones have become widely used. Noise-canceling headphones not only reduce ambient noise and protect users' hearing, but also allow people to listen to high-quality music, enhancing their enjoyment of the experience. Noise-canceling headphones are increasingly favored by consumers, and at the same time, people's demands for their noise-canceling performance are also rising. However, in practical use, the noise-canceling effect of current noise-canceling headphones is generally average; currently, no noise-canceling headphone can simultaneously achieve both call noise cancellation and ambient noise cancellation. Therefore, the market needs a new type of wireless headphone that can further improve noise-canceling performance.

[0003] In addition, when users wear headphones while running or in high-speed airflow environments, the airflow directly impacts the microphone, generating significant wind noise that affects sound quality and user experience. Utility Model Content

[0004] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the aforementioned problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a TWS Bluetooth earphone with reduced noise impact, comprising an earphone shell and an earphone assembly, wherein the earphone assembly is disposed inside the earphone shell, and the earphone shell is provided with a sound outlet. The headphone housing includes a front shell, a middle shell, and a rear shell; the front shell covers one side of the middle shell and together with the middle shell forms an accommodating space, which includes a first cavity and a second cavity, and the sound outlet is provided on the front shell to connect the first cavity with the outside of the front shell; The rear shell is located on the other side of the middle shell and together with the middle shell, they form another receiving space, which contains a third cavity; The feedback microphone is located in the first cavity, the call microphone is located in the third cavity, and the feedforward microphone is located in the third cavity; the rear shell or the middle shell has a call pickup hole that cooperates with the call microphone, and a feedforward pickup hole that cooperates with the feedforward microphone. The feedforward microphone and the call microphone are used to confirm the location of the target sound source and feed back the location of the target sound source to the main control module. The call microphone is used to pick up the target sound source signal. The feedback microphone is used to collect the noise signal inside the earphone and feed it back to the main control module. The feedforward microphone is used to collect the noise signal outside the earphone and feed it back to the main control module. The main control module's circuit board is located inside the third cavity, and the call microphone is located on the circuit board. The circuit board has a first connecting hole that mates with the call microphone. An airflow damping component is provided inside the middle shell or rear shell. The airflow damping component is provided with a flow channel that connects the call pickup hole and the first connecting hole. The flow channel is correspondingly formed with an inflow path that allows airflow to enter from the call pickup hole to the first connecting hole. The flow channel has at least 3 sub-flow channels that are connected sequentially along the inflow path. In the direction of airflow inflow: the cross-sectional area of ​​each sub-channel is larger than that of the previous sub-channel. The sub-channel at the front end of the inflow path is connected to the microphone hole, and the sub-channel at the back end of the inflow path is connected to the first connecting hole. The cross-sectional area of ​​the sub-channel at the back end of the inflow path is larger than that of the first connecting hole.

[0006] A further technical solution of this utility model: the flow channel is configured to make the inflow path form an angle turn of at least 90 degrees.

[0007] A further technical solution of this utility model: the foremost sub-channel is connected to the last sub-channel through the middle sub-channel, and the inlet and outlet of the middle sub-channel are set at an angle greater than or equal to 90 degrees.

[0008] A further technical solution of this utility model: the main control chip of the main control module adopts the AC7016G model chip.

[0009] A further technical solution of this utility model: the speaker unit is disposed between the first cavity and the second cavity, separating the first cavity and the second cavity; A pressure relief hole is provided on the middle shell to connect the second cavity with the outside of the middle shell.

[0010] A further technical solution of this utility model: the part of the front shell away from the middle shell is arranged in a ring shape, and the sound outlet is the inner channel of the ring structure or is formed by the ring structure.

[0011] A further technical solution of this utility model: an ear cap is also connected to the ring structure, and the ear cap is a soft and resilient elastic rubber structure.

[0012] Compared with existing technologies, the beneficial effects of this technical solution are: the three microphones work together to achieve active noise cancellation and environmental noise cancellation, effectively improving the noise cancellation performance of the headphones; through the multi-stage expansion space formed by at least three sub-channels, the airflow energy is consumed through multi-stage expansion, thereby slowing down the airflow and reducing the airflow speed towards the call microphone, thus reducing wind noise.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] 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.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the present invention. Figure 1 The back cover was hidden on top of that; Figure 3 This is another internal structure diagram of the present invention. Figure 2 The speaker unit, circuit board, and components mounted on the circuit board are hidden within the structure. Figure 4 This is a cross-sectional view of the structure of this utility model, which hides the speaker unit; Figure 5 for Figure 4 Enlarged schematic diagram of a local structure at point A; Figure 6 This is the circuit schematic diagram of the main control module of this utility model; The corresponding labels in the attached diagram are explained as follows: Sound outlet -1, speaker unit -2, feedback microphone -3, call microphone -4, feedforward microphone -5, first cavity -6, second cavity -7, third cavity -8, front shell -9, middle shell -10, rear shell -11, call pickup hole -12, feedforward pickup hole -13, circuit board -14, first connecting hole -15, second connecting hole -16, airflow damping component -17, foremost sub-channel -18, middle sub-channel -19, rearmost sub-channel -20, pressure relief hole -21, ear cap -22. Detailed Implementation

[0016] 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, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-6 A TWS Bluetooth earphone with reduced noise impact includes an earphone shell and an earphone assembly, the earphone assembly being disposed inside the earphone shell, and the earphone shell having a sound outlet 1.

[0018] The headphone assembly includes a main control module, a speaker unit 2, a feedback microphone 3, a call microphone 4, and a feedforward microphone 5. The feedback microphone 3, the call microphone 4, the feedforward microphone 5, and the speaker unit 2 are all electrically connected to the main control module.

[0019] The internal space of the earphone shell includes a first cavity 6, a second cavity 7, and a third cavity 8. The feedback microphone 3 is located in the first cavity 6, the call microphone 4 is located in the third cavity 8, the feedforward microphone 5 is located in the third cavity 8, and the sound outlet 1 is connected to the first cavity 6.

[0020] In some embodiments, the earphone housing includes a front shell 9, a middle shell 10, and a rear shell 11. The front shell 9 covers one side of the middle shell 10 and together with the middle shell 10 forms an accommodating space, which includes the aforementioned first cavity 6 and second cavity 7.

[0021] A sound outlet 1 is provided on the front shell 9 to connect the inside and outside of the receiving space. Specifically, the sound outlet 1 is located on the front shell at a position corresponding to the first cavity 6 to connect the first cavity 6 with the outside of the front shell 9. For example, the portion of the front shell 9 away from the middle shell 10 is arranged in a ring shape, and the sound outlet 1 is an inner channel of this ring structure, or can be understood as being formed by the ring structure. For better wearing or other purposes, an ear cap 22 is also connected to this ring structure, and the ear cap 22 is, for example, a soft and resilient elastic rubber structure.

[0022] The rear shell 11 covers the other side of the middle shell 10 and together with the middle shell 10 forms another receiving space, which includes the aforementioned third cavity 8. The rear shell or the middle shell 10 has a communication pickup hole 12 that cooperates with the communication microphone 4, and a feedforward pickup hole 13 that cooperates with the feedforward microphone 5.

[0023] The feedforward microphone 5 and the call microphone 4 are used to confirm the location of the target sound source and feed back the location of the target sound source to the main control module. The call microphone is used to pick up the target sound source signal. The feedback microphone 3 is used to collect the noise signal inside the earphone and feed back the noise signal inside the earphone to the main control module. The feedforward microphone 5 is used to collect the noise signal outside the earphone and feed back the noise signal outside the earphone to the main control module.

[0024] Specifically, the call microphone 4 and the feedforward microphone 5 form a dual-microphone array. The main control module adopts beamforming technology, which can accurately locate the direction of human voice. The call microphone 4 can then accurately pick up the user's voice signal, while interference signals from other non-target sound sources are eliminated. The call microphone 4 and the feedforward microphone 5 interact to achieve environmental noise reduction for the headphones.

[0025] Feedback microphone 3 collects noise signals from inside the headphones and feeds them back to the main control module. Feedforward microphone 5 collects noise signals from outside the headphones and feeds them back to the main control module. The main control module adds an anti-phase sound wave to the speaker unit 2 of the headphone assembly. The phase of the anti-phase sound wave is configured to be exactly opposite to the waveform of the ambient noise signal. Ultimately, the sound heard by the user is ambient noise plus the anti-phase ambient noise. The superposition of the two noises achieves perceived noise reduction. The interaction between feedback microphone 3 and feedforward microphone 5 enables active noise cancellation in the headphones.

[0026] In some embodiments, the speaker unit 2 is used to convert electrical signals into sound wave signals to enable the sound playback function of the headphones. The speaker unit 2 is disposed between the first cavity 6 and the second cavity 7, separating the first cavity 6 and the second cavity 7. In some embodiments, the speaker unit includes a loudspeaker.

[0027] In some embodiments, the main control module uses an AC7016G chip as its main control chip, equipped with a high-performance Bluetooth 5.3 main control chip, to provide hardware support for the efficient operation of active noise cancellation and environmental noise cancellation.

[0028] In some embodiments, the circuit board 14 of the main control module is disposed in the third cavity 8, and the feedforward microphone 5 and the call microphone 4 are respectively disposed on the circuit board 14.

[0029] In some embodiments, a first communication hole 15 cooperating with a call microphone 4 is provided through the circuit board 14, and a second communication hole 16 cooperating with a feedforward microphone 5 is provided through the circuit board 14.

[0030] The first connecting hole 15 is connected to the call pickup hole 12, and the user's voice is acquired by the call microphone 4 through the call pickup hole 12-first connecting hole 15.

[0031] The second connecting hole 16 is connected to the feedforward pickup hole 13, and external sound is acquired by the feedforward microphone 5 through the feedforward pickup hole 13-second connecting hole 16.

[0032] An airflow damping member 17 is provided inside the middle shell 10 or the rear shell. The airflow damping member 17 is provided with a flow channel that connects the voice pickup hole 12 and the first connecting hole 15. The flow channel is formed with an inflow path that allows airflow to enter from the voice pickup hole 12 to the first connecting hole 15.

[0033] The flow channel has at least three sub-flow channels (18, 19, 20) connected sequentially along the inflow path. In the direction of airflow inflow: the cross-sectional area of ​​each sub-flow channel is larger than that of the previous sub-flow channel. The sub-flow channel 18 located at the front end of the inflow path is connected to the communication pickup hole 12, and the sub-flow channel 20 located at the rear end of the inflow path is connected to the first connecting hole 15. The cross-sectional area of ​​the sub-flow channel 20 located at the rear end of the inflow path is larger than that of the first connecting hole 15.

[0034] The multi-stage expansion space formed by at least three sub-channels consumes airflow energy through multi-stage expansion, thereby slowing down the airflow and reducing the airflow speed towards the microphone, thus reducing wind noise.

[0035] In some embodiments, the flow channel is configured to at least cause the inflow path to form an angular deflection, the angular deflection being greater than or equal to 90 degrees, so as to reduce the airflow while preventing it from rushing straight into the first connecting hole 15.

[0036] like Figure 4 , 5 As shown, for example, the foremost sub-channel 18 achieves an angular change with the last sub-channel 20 through the middle sub-channel 19, and the inlet and outlet directions of the middle sub-channel 19 form a corresponding angular angle.

[0037] In some embodiments, the middle shell 10 is provided with a pressure relief hole 21 that connects the second cavity 7 with the outside of the middle shell.

[0038] In this embodiment, the main control module also includes modules such as a wireless module and a power module that enable the TWS Bluetooth headset to operate normally.

[0039] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A TWS Bluetooth earphone with reduced noise impact, comprising an earphone shell and an earphone assembly, the earphone assembly being disposed within the earphone shell, and the earphone shell having a sound outlet, characterized in that, The headphone assembly includes a main control module, a speaker unit, a feedback microphone, a call microphone, and a feedforward microphone. The feedback microphone, call microphone, feedforward microphone, and speaker unit are all electrically connected to the main control module. The headphone housing includes a front shell, a middle shell, and a rear shell; the front shell covers one side of the middle shell and together with the middle shell forms an accommodating space, which includes a first cavity and a second cavity, and the sound outlet is provided on the front shell to connect the first cavity with the outside of the front shell; The rear shell is located on the other side of the middle shell and together with the middle shell, they form another receiving space, which contains a third cavity; The feedback microphone is located in the first cavity, the call microphone is located in the third cavity, and the feedforward microphone is located in the third cavity; the rear shell or the middle shell has a call pickup hole that cooperates with the call microphone, and a feedforward pickup hole that cooperates with the feedforward microphone. The feedforward microphone and the call microphone are used to confirm the location of the target sound source and feed back the location of the target sound source to the main control module. The call microphone is used to pick up the target sound source signal. The feedback microphone is used to collect the noise signal inside the earphone and feed it back to the main control module. The feedforward microphone is used to collect the noise signal outside the earphone and feed it back to the main control module. The main control module's circuit board is located inside the third cavity, and the call microphone is located on the circuit board. The circuit board has a first connecting hole that mates with the call microphone. An airflow damping component is provided inside the middle shell or rear shell. The airflow damping component is provided with a flow channel that connects the call pickup hole and the first connecting hole. The flow channel is correspondingly formed with an inflow path that allows airflow to enter from the call pickup hole to the first connecting hole. The flow channel has at least 3 sub-flow channels that are connected sequentially along the inflow path. In the direction of airflow inflow: the cross-sectional area of ​​each sub-channel is larger than that of the previous sub-channel. The sub-channel at the front end of the inflow path is connected to the microphone hole, and the sub-channel at the back end of the inflow path is connected to the first connecting hole. The cross-sectional area of ​​the sub-channel at the back end of the inflow path is larger than that of the first connecting hole.

2. The TWS Bluetooth earphone according to claim 1, characterized in that, The flow path is configured to create at least one angular turn in the inflow path, with the angular turn being greater than or equal to 90 degrees. 3.The TWS Bluetooth earphone of claim 2, wherein, The foremost sub-channel is connected to the last sub-channel through the middle sub-channel, and the inlet and outlet of the middle sub-channel are set at an angle greater than or equal to 90 degrees.

4. The TWS Bluetooth earphone according to claim 1, characterized in that, The main control chip of the main control module is the AC7016G model.

5. The TWS Bluetooth earphone according to claim 1, characterized in that, The speaker unit is positioned between the first cavity and the second cavity, separating the first cavity and the second cavity; A pressure relief hole is provided on the middle shell to connect the second cavity with the outside of the middle shell.

6. The TWS Bluetooth earphone according to claim 1, characterized in that, The portion of the front shell away from the middle shell is arranged in a ring shape, and the sound outlet is either an inner channel of the ring structure or formed by the ring structure.

7. The TWS Bluetooth earphone according to claim 6, characterized in that, The ring structure is also connected to an ear cap, which is a soft and resilient elastic rubber structure.

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