An earphone structure of a multi-microphone design

Abstract

This utility model discloses a multi-microphone earphone structure, including a housing, a speaker, a battery, and microphones. The housing includes an upper shell and a lower shell that cooperate with each other, forming a receiving cavity. The lower shell has a sound outlet tube with a sound outlet hole. The speaker is located at the upper end of the sound outlet tube, with its sound-emitting surface facing the sound outlet hole. A first PCB board is located on the side of the battery away from the speaker. The microphones include a first microphone, a second microphone, and a third microphone. The first and second microphones are located on the first PCB board and spaced apart. The first and second microphones are located on the upper wall of the upper shell, and the third microphone is located inside the sound outlet hole. A feedforward microphone collects ambient noise, and a feedback microphone collects background noise in the ear canal. Both microphones send the noise signals to a noise-canceling chip for processing. Finally, the speaker emits a reverse sound wave to cancel out some of the noise.

Description

Technical Field

[0001] This utility model relates to the field of headphones, and in particular to a headphone structure with a multi-microphone design. Background Technology

[0002] Hearing aids mainly consist of five parts: microphone, amplifier, earphone, power supply, and volume control. Hearing aids are classified by conduction method into air conduction hearing aids and bone conduction hearing aids; and by usage method into body-worn, eyeglass-style, hair clip-on, behind-the-ear, in-the-ear, in-the-canal, and fully-in-the-canal hearing aids.

[0003] Existing hearing aids are generally large in size, making them inconvenient to carry; they are also heavy, which affects the user experience.

[0004] Of course, there are existing structures that combine hearing aids with TWS earphones, but these earphones suffer from issues with sealing and poor hearing aid performance.

[0005] Specifically, see Chinese Patent 202411773445.3. Utility Model Content

[0006] The main purpose of this utility model is to propose a multi-microphone earphone structure, which aims to eliminate the medical device label of hearing aids, adopt a fashionable TWS design, reduce users' psychological resistance, and achieve seamless integration of hearing compensation with life scenarios in invisible wearing.

[0007] At the same time, a multi-microphone structure is adopted to combine Bluetooth headphones with hearing aids, thereby achieving the intended sound amplification effect and improving applicability.

[0008] To achieve the above objectives, this utility model proposes a headphone structure with a multi-microphone design, comprising:

[0009] The housing includes an upper shell and a lower shell that fit together, forming a receiving cavity. The lower shell is provided with a sound outlet tube, and the sound outlet tube is provided with a sound outlet hole.

[0010] A loudspeaker is located at the upper end of the sound outlet tube, with the sound-emitting surface of the loudspeaker facing the sound outlet.

[0011] A battery, wherein a first PCB board is provided on the side of the battery away from the speaker;

[0012] The microphone includes a first microphone, a second microphone, and a third microphone.

[0013] The first microphone and the second microphone are disposed on the first PCB board and are spaced apart. The first microphone and the second microphone are disposed on the upper wall surface of the upper shell.

[0014] The third microphone is located inside the sound outlet.

[0015] In the specific design, the first microphone, the second microphone, and the third microphone are respectively a call microphone, a feedforward microphone, and a feedback microphone. The feedforward microphone is responsible for collecting ambient noise, and the feedback microphone is responsible for collecting noise in the ear canal. Both send the noise signal to the noise reduction chip for processing, and finally the speaker emits an inverse sound wave to cancel out part of the noise.

[0016] This improves the sound filtering and amplification of the hearing aid, enhancing the user experience;

[0017] Specifically, it can be understood that the external sound is collected by the feedback microphone and the sound pickup of the call microphone, the predetermined audio is amplified by the control chip of the main PCB board, and then sent to the human ear through the speaker and the sound outlet, thereby realizing the predetermined sound amplification function and improving the applicability and miniaturization of the hearing aid. Attached Figure Description

[0018] Figure 1 For the purpose of this utility model explosion Figure 1 ;

[0019] Figure 2 For the purpose of this utility model explosion Figure 2 ;

[0020] Figure 3 This is a half-sectional schematic diagram of the present invention;

[0021] Figure 4 Schematic diagram of the shell section Figure 1 ;

[0022] Figure 5 Schematic diagram of the shell section Figure 2 ;

[0023] Figure 6 Schematic diagram of the shell section Figure 3 ;

[0024] Figure 7 Schematic diagram of the shell section Figure 4 ;

[0025] Figure 8 This is a 3D diagram of the headphones.

[0026] In the picture,

[0027] 1 is the outer shell, 11 is the upper shell, 12 is the lower shell, and 13 is the receiving cavity.

[0028] 2 is the sound tube, 20 is the sound hole, and 21 is the slot.

[0029] 3 is the speaker.

[0030] 4 is a battery.

[0031] 51 is the first microphone, 52 is the second microphone, and 53 is the third microphone.

[0032] 54 is the first pickup hole, and 55 is the second pickup hole.

[0033] 6 is the main PCB board, 61 is the first PCB board, and 62 is the second PCB board.

[0034] 7 is the support frame.

[0035] 81 is the inner perimeter, and 82 is the outer perimeter.

[0036] 9 is the step to avoid the air, 91 is the first hook, and 92 is the second hook. Detailed Implementation

[0037] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0038] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0039] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0040] like Figures 1 to 8 As shown, a multi-microphone headphone structure includes:

[0041] The housing 1 includes an upper shell 11 and a lower shell 12 that cooperate with each other, forming a receiving cavity 13. The lower shell 12 is provided with a sound outlet tube 2, and the sound outlet tube 2 is provided with a sound outlet hole 20.

[0042] The loudspeaker 3 is located at the upper end of the sound outlet tube 2, and the sound-emitting surface of the loudspeaker 3 is positioned opposite to the sound outlet 20.

[0043] Battery 4, the side of battery 4 away from speaker 3 is provided with a first PCB board 61;

[0044] The microphone includes a first microphone 51, a second microphone 52, and a third microphone 53.

[0045] The first microphone 51 and the second microphone 52 are disposed on the first PCB board 61 and are spaced apart. The first microphone 51 and the second microphone 52 are disposed on the upper wall surface of the upper shell 11.

[0046] The third microphone 53 is located inside the sound outlet 20.

[0047] In the specific design, the first microphone 51, the second microphone 52 and the third microphone 53 are respectively a call microphone, a feedforward microphone and a feedback microphone. The feedforward microphone is responsible for collecting ambient noise, and the feedback microphone is responsible for collecting noise in the ear canal. Both send the noise signal to the noise reduction chip for processing, and finally the speaker 3 emits a reverse sound wave to cancel out part of the noise.

[0048] This improves the sound filtering and amplification of the hearing aid, enhancing the user experience;

[0049] Specifically, it can be understood that the external sound is collected by the feedback microphone and the sound pickup of the call microphone, the predetermined audio is amplified by the control chip of the main PCB board 6, and then sent to the human ear through the speaker 3 to the sound outlet 20, thereby realizing the predetermined sound amplification function and improving the applicability and miniaturization of the hearing aid.

[0050] Specifically, speaker 3 is tilted.

[0051] Specifically, existing technologies can be used to achieve hearing aids.

[0052] Specifically, the sound outlet 20 is provided with a slot 21 that is off-axis, the slot 21 extends along the length of the sound outlet 20, and the third microphone 53 is installed in the slot 21.

[0053] Specifically, the third microphone 53 is connected to the main PCB board 6 via the second PCB board 62. The main PCB board 6 is also electrically connected to the first PCB board 61. Preferably, the main PCB board 6 is equipped with a control chip to realize predetermined decoding and calculation, thereby amplifying the volume of the speaker 3.

[0054] Specifically, the second PCB board 62 is a flexible PCB board, wherein the structure of the flexible PCB board can reduce the generation of resonance, while achieving the functions of conducting electricity and acquiring information.

[0055] Specifically, a bracket 7 is provided between the battery 4 and the first PCB board 61, and a limiting groove is provided on the upper wall of the bracket 7 for mounting the first PCB board 61.

[0056] The battery 4 is located on the lower wall of the bracket 7. Through reasonable design, resonance problems can be reduced and installation stability can be improved. Specifically, the lower wall of the bracket 7 is a cavity with an opening at the lower end, and the battery 4 is located in the cavity, which facilitates installation while providing effective protection.

[0057] Specifically, the lower end wall of the upper shell 11 is provided with an inner circumference portion 81, and the upper end wall of the lower shell 12 is provided with an outer circumference portion 82 that cooperates with the inner circumference portion 81.

[0058] The lower end of the inner portion 81 extends toward the outer portion 82 with a first hook 91, and the outer portion 82 is provided with a second hook 92 that cooperates with the first hook 91.

[0059] Specifically, the inner part 81 and the outer part 82 work together to make the combination of the two more stable. Furthermore, in order to improve the service life of the hearing aid (including drop resistance and waterproof rating), the first and second hooks are matched by misalignment to improve the water tightness between the upper shell 11 and the lower shell 12.

[0060] It has the following advantages:

[0061] 1. The product is lightweight, with each earbud weighing only 5.6g and the charging case weighing 42.5g. It is IP55 dustproof and waterproof, suitable for outdoor sports (hiking, cycling) and other scenarios.

[0062] 2. Uses an ultra-thin speaker with a thickness of only 2.5mm, which meets acoustic requirements while reducing product size. Each ear uses a 3-microphone array, and the hybrid active noise cancellation depth reaches 35-40dB.

[0063] 2. Ultra-long battery life design: the earbuds can be used for more than 10 hours on a single charge, and the charging case can charge the earbuds 3 times on a full charge.

[0064] 4. Personalized adjustment via APP: Users can perform hearing self-tests, customize compensation curves, and switch scene modes (such as meeting / outdoor) through the mobile device to achieve personalized adaptation. The seamless and transparent mode allows users to naturally perceive external sounds while wearing the device, eliminating the closed-off feeling of traditional hearing aids.

[0065] Specifically, there is a clearance step 9 between the second hook and the inner circumference 81, and a gap is provided between the inner circumference 81, the outer circumference 82, the first hook and the second hook, so as to apply glue. Furthermore, the clearance step 9 facilitates the assembly of the upper shell 11 and the lower shell 12 while preventing excess glue from being applied.

[0066] Specifically, the first microphone 51, the second microphone 52, and the third microphone 53 are respectively a call microphone, a feedforward microphone, and a feedback microphone. The built-in design of the feedforward microphone can effectively improve the performance of the hearing aid. For example, the feedforward microphone can also collect the audio of the speaker 3, thereby providing feedback on whether the speaker 3 is working.

[0067] Specifically, the top wall of the upper shell 11 is provided with a first pickup hole 54 and a second pickup hole 55, and the first microphone 51 and the second microphone 52 are respectively arranged opposite to the first pickup hole 54 and the second pickup hole 55.

[0068] Specifically, a waterproof mesh and hollow foam cotton are provided between the pickup hole and the microphone, which can reduce resonance and achieve a sealed positioning of the microphone. In particular, a buckle can be provided for installation and fixation.

[0069] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An earphone structure of a multi-microphone design, characterized by, include: The housing includes an upper shell and a lower shell that fit together, forming a receiving cavity. The lower shell is provided with a sound outlet tube, and the sound outlet tube is provided with a sound outlet hole. A loudspeaker is located at the upper end of the sound outlet tube, with the sound-emitting surface of the loudspeaker facing the sound outlet. A battery, wherein a first PCB board is provided on the side of the battery away from the speaker; The microphone includes a first microphone, a second microphone, and a third microphone. The first microphone and the second microphone are disposed on the first PCB board and are spaced apart. The first microphone and the second microphone are disposed on the upper wall surface of the upper shell. The third microphone is located inside the sound outlet.

2. The multi-microphone designed earphone structure of claim 1, wherein: The sound outlet is provided with an off-axis slot that extends along the length of the sound outlet, and the third microphone is installed in the slot.

3. The headphone structure with a multi-microphone design as described in claim 2, characterized in that: The third microphone is connected via the second PCB board, which is also electrically connected to the first PCB board.

4. The headphone structure with a multi-microphone design as described in claim 3, characterized in that: The second PCB board is a flexible PCB board.

5. The headphone structure with a multi-microphone design as described in claim 1, characterized in that: A bracket is provided between the battery and the first PCB board, and a limiting groove is provided on the upper wall of the bracket for mounting the first PCB board. The battery is located on the lower wall of the bracket.

6. The headphone structure with a multi-microphone design as described in claim 1, characterized in that: The lower end wall of the upper shell is provided with an inner circumference portion, and the upper end wall of the lower shell is provided with an outer circumference portion that mates with the inner circumference portion. The lower end of the inner portion extends toward the outer portion with a first hook, and the outer portion is provided with a second hook that cooperates with the first hook.

7. The headphone structure with a multi-microphone design as described in claim 6, characterized in that: A step is provided to allow clearance between the second hook and the inner circumference.

8. The headphone structure with a multi-microphone design as described in claim 1, characterized in that: The first microphone, the second microphone, and the third microphone are a call microphone, a feedforward microphone, and a feedback microphone, respectively.

9. The headphone structure with a multi-microphone design as described in claim 1, characterized in that: The top wall of the upper shell is provided with a first microphone hole and a second microphone hole, and the first microphone and the second microphone are respectively arranged opposite to the first microphone hole and the second microphone hole.

10. The headphone structure with a multi-microphone design as described in claim 9, characterized in that: A waterproof mesh and hollow foam are provided between the pickup hole and the microphone.

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