Unvarnished transmission structure based on in-ear earphone

Abstract

The invention relates to an unvarnished transmission structure based on an in-ear earphone, and belongs to the technical field of earphones. The unvarnished transmission structure based on the in-ear earphone comprises an environment sound microphone and a main control chip, the environment sound microphone is in communication connection with the main control chip through an SPI interface, and the surface of the environment sound microphone is provided with an unvarnished transmission protection mechanism; the unvarnished transmission protection mechanism comprises a mounting shell and an analog switch chip, a sound hole is formed in one end of the mounting shell, and when a user blocks the sound hole, the user inevitably triggers the pressure sensor through the pressing ring at the moment, so that the master control switch controls the analog switch chip to stop normal operation of the ambient sound microphone; the environment sound microphone can be prevented from collecting sound, necessary factors causing high-frequency howling are actively cut off, and the problem that a transparent transmission structure based on an in-ear earphone is prone to being blocked to cause howling, and consequently a hearing system is damaged is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of earphones, and particularly to a transparent transmission structure based on in-ear earphones. Background Art

[0002] In-ear earphones seal the ear canal with earplugs made of materials such as glue and sponge to reduce external noise interference and provide an immersive sound effect. In the transparent transmission mode, the ambient sound is collected by an in-ear microphone built into the earphone and transmitted into the ear, enabling users to clearly perceive the surrounding sounds without removing the earphones, thus enhancing the safety in outdoor activities or mobile scenarios.

[0003] Since in the transparent transmission mode of the earphone, the outward-facing microphone continuously collects external ambient sounds, some users may press the sound hole where the outward-facing microphone is located when wearing the earphone. At this time, the sound will form an "echo wall" inside the temporarily closed earphone, and the sound is repeatedly picked up and amplified by the microphone, forming a cycle of "microphone → amplifier → speaker → microphone", ultimately triggering high-frequency whistling, which may directly damage the hearing system or induce ear canal inflammation in users due to high-frequency sound waves, presenting a safety hazard. Summary of the Invention

[0004] Based on this, it is necessary to provide a transparent transmission structure based on in-ear earphones to address the problem that the transparent transmission structure based on in-ear earphones is prone to whistling caused by blockage, resulting in damage to the hearing system.

[0005] A transparent transmission structure based on in-ear earphones includes an ambient sound microphone and a main control chip. The ambient sound microphone is communicatively connected to the main control chip through an SPI interface, and a transparent transmission protection mechanism is installed on the surface of the ambient sound microphone.

[0006] Further, the transparent transmission protection mechanism includes a mounting shell and an analog switch chip. One end of the mounting shell is provided with a sound hole, and the ambient sound microphone is embedded inside the sound hole. One end of the mounting shell is provided with a mounting cavity surrounding the outside of the sound hole. A pressing ring is slidably connected inside the mounting cavity. One end of the pressing ring penetrates out of the mounting cavity. A pressure sensor is embedded inside the mounting cavity. The length of the part of the pressing ring penetrating out of the mounting cavity is greater than the distance between the pressing ring and the pressure sensor. The pressure sensor and the analog switch chip are communicatively connected to the main control chip through an SPI interface, and the analog switch chip is communicatively connected to the ambient sound microphone through an SPI interface.

[0007] Further, the transparent transmission protection mechanism further includes a power amplifier chip, a high-pass filter, and a speaker. The power amplifier chip is communicatively connected to the main control chip through an SPI interface. The high-pass filter is communicatively connected to the power amplifier chip through an SPI interface. The high-pass filter is electrically connected to the speaker through a shielded wire.

[0008] In one embodiment, during the process that the speaker emits a sound with a deep and continuous vibrating feeling, at this time, the outer shell of the earphone drives the waterproof and breathable film through the mounting shell and can also generate slight vibrations, which can shake off impurities such as dust and water vapor adhering to the surface of the waterproof and breathable film, so as to reduce the probability that these impurities are squeezed into the waterproof and breathable film by fingers and ensure the integrity of the waterproof and breathable film.

[0009] Further, the cross-sectional shapes of the mounting cavity and the pressing ring are both stepped, and the movable range of the pressing ring inside the mounting cavity is greater than the distance between the pressing ring and the pressure sensor.

[0010] In one embodiment, the mounting cavity can not only define the running track of the pressing ring, but also prevent the pressing ring from detaching from the mounting cavity, so as to achieve a good guiding and limiting effect.

[0011] Further, the partial cross-sectional shape of the pressing ring penetrating out of the mounting cavity is semi-circular, and the corners of the pressing ring are rounded.

[0012] In one embodiment, this can not only reduce the probability that the user is scratched by the pressing ring during the process of adjusting the pressing ring, but also, due to the change of the contact area, it can also facilitate the user to feel the foreign body sensation of the hand during the process of wearing the earphone, so as to achieve the effect of correcting the user's wearing method.

[0013] Further, a spring is arranged between the mounting cavity and the pressing ring, and the spring is adhesively fixed to the mounting cavity and the pressing ring through epoxy resin.

[0014] In one embodiment, the spring can automatically reset the pressing ring after the pressing ring loses the block, and avoid the situation that the pressing ring continuously contacts the pressure sensor, resulting in the abnormal use of the earphone.

[0015] Further, the spring is a component made of neoprene material, and the shape of the spring is a ring frame shape.

[0016] In one embodiment, this can extend the service life of the spring.

[0017] Further, one end of the mounting shell is adhesively bonded with a waterproof and breathable film, and the waterproof and breathable film is arranged and covers one end of the sound hole facing away from the main control chip.

[0018] In one embodiment, on the basis of effectively blocking the entry of external water vapor into the sound hole, this can ensure the normal circulation of the gas inside and outside the earphone, so as to reduce the phenomenon of "ear plugging" during the wearing process of the earphone.

[0019] Further, the diameter of the waterproof and breathable membrane is smaller than the minimum inner diameter of the pressing ring, and the waterproof and breathable membrane is arranged inside the pressing ring; one end of the mounting shell is provided with a groove communicating with the sound hole, and the waterproof and breathable membrane is bonded inside the groove; the thickness of the waterproof and breathable membrane is the same as that of the groove, and the diameter of the waterproof and breathable membrane is the same as the inner diameter of the groove.

[0020] In one embodiment, this can prevent the waterproof and breathable membrane from hindering the normal operation of the pressing ring.

[0021] In the above-mentioned through-transmission structure of the in-ear headphone, when the user blocks the sound hole, it is inevitable that the user triggers the pressure sensor through the pressing ring at this time, so that the main control switch controls the analog switch chip to stop the normal operation of the ambient sound microphone. This can prevent the ambient sound microphone from collecting sound and actively cut off the necessary factors causing high-frequency whistling, so as to solve the problem that the through-transmission structure of the in-ear headphone is prone to whistling due to being blocked, resulting in damage to the hearing system.

[0022] While the active switch stops the ambient sound microphone, the main control chip correspondingly controls the power amplifier chip to transmit the pre-set low-frequency sine wave to the speaker. Even if the speaker is emitting high-frequency whistling, this can also actively perform frequency reduction processing. During the process of the speaker playing the low-frequency sine wave, the speaker can emit a sound with a low and continuous vibration feeling, which can actively warn the user of incorrect headphone wearing to ensure that the user can wear the headphones correctly and safely.

[0023] During the process of the speaker emitting a sound with a low and continuous vibration feeling, at this time, the outer shell of the headphone drives the waterproof and breathable membrane through the mounting shell and can also generate slight vibrations, which can shake off impurities such as dust and water vapor adhering to the surface of the waterproof and breathable membrane, so as to reduce the extrusion of these impurities into the waterproof and breathable membrane by the fingers and ensure the integrity of the waterproof and breathable membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 It is a schematic structural diagram of the overall structure in the present invention;

[0026] Figure 2 It is a schematic structural diagram of a partial structure in the present invention;

[0027] Figure 3 It is a schematic cross-sectional view of a partial structure in the present invention;

[0028] Figure 4 It is an exploded view of the local structure in the present invention;

[0029] Figure 5 It is a connection diagram of the overall structure and the earphone housing in the present invention;

[0030] Figure 6 It is a sectional view of the overall structure and the earphone housing in the present invention;

[0031] Figure 7 It is a system flowchart of the present invention.

[0032] Reference numerals:

[0033] 100, ambient sound microphone; 200, main control chip; 300, transparent transmission protection mechanism; 310, mounting shell; 311, sound hole; 312, mounting cavity; 313, groove; 320, pressing ring; 330, pressure sensor; 340, analog switch chip; 350, power amplifier chip; 360, high-pass filter; 370, speaker; 380, spring; 390, waterproof and breathable membrane. Detailed implementation manners

[0034] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the description of the present invention are only for the purpose of illustration and do not represent the only implementation manner.

[0036] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0037] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first feature is in direct contact with the second feature, or the first feature is in indirect contact with the second feature through an intermediate medium. Moreover, the first feature being "above", "over" or "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" or "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0038] Unless otherwise defined, all technical and scientific terms used in the description of the present invention have the same meaning as commonly understood by those skilled in the technical field to which the present invention pertains. The terms used in the description of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in the description of the present invention includes any and all combinations of one or more of the related listed items.

[0039] The following combines Figure 1 - Figure 7 to describe the transparent transmission structure of the in-ear headphones of the present invention.

[0040] In one embodiment, a transparent transmission structure based on in-ear headphones includes an ambient sound microphone 100 and a main control chip 200. The ambient sound microphone 100 is communicatively connected to the main control chip 200 through an SPI interface, and a transparent transmission protection mechanism 300 is mounted on the surface of the ambient sound microphone 100;

[0041] The in-ear headphones include a plastic headphone shell. An sound outlet hole is provided at one end of the plastic headphone shell. An earplug is sleeved on the surface of the plastic headphone shell and is disposed outside the sound outlet hole. A speaker 370 is embedded inside the sound outlet hole. The main control chip 200 is snap-fitted inside the plastic headphone shell through a card slot. A Bluetooth module, an ADC acquisition module, and an ANC noise reduction module are communicatively connected to the surface of the main control chip 200 through an SPI interface. A power supply electrically connected to the main control chip 200 is embedded inside the in-ear headphones; the model of the ambient sound microphone 100 can be AMS1110 of AAC Technologies; the model of the main control chip 200 can be QCC3071 of Qualcomm; the model of the pressure sensor 330 can be LFC-10; the model of the power amplifier chip 350 can be EC6D-5BD; the model of the high-pass filter 360 can be QCC3050; the model of the speaker 370 can be SLS1115E.

[0042] Such as Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7As shown in the figure, the transparent transmission protection mechanism 300 includes an installation shell 310 and an analog switch chip 340. One end of the installation shell 310 is provided with a sound hole 311, and the ambient sound microphone 100 is embedded inside the sound hole 311. One end of the installation shell 310 is provided with an installation cavity 312 surrounding the outside of the sound hole 311. A pressing ring 320 is slidably connected inside the installation cavity 312. One end of the pressing ring 320 penetrates out of the installation cavity 312. A pressure sensor 330 is embedded inside the installation cavity 312. The partial length of the pressing ring 320 penetrating out of the installation cavity 312 is greater than the distance between the pressing ring 320 and the pressure sensor 330. The pressure sensor 330 and the analog switch chip 340 are communicatively connected to the main control chip 200 through an SPI interface. The analog switch chip 340 is communicatively connected to the ambient sound microphone 100 through an SPI interface.

[0043] As Figure 6 and Figure 7 shown in the figure, the transparent transmission protection mechanism 300 further includes a power amplifier chip 350, a high-pass filter 360 and a speaker 370. The power amplifier chip 350 is communicatively connected to the main control chip 200 through an SPI interface. The high-pass filter 360 is communicatively connected to the power amplifier chip 350 through an SPI interface. The high-pass filter 360 is electrically connected to the speaker 370 through a shielded wire. It should be noted that the frequency of the low-frequency sine wave played by the speaker 370 needs to be between 20 - 100 Hz, and the specific frequency needs to be selected according to the actual situation. During the process of the speaker 370 emitting a low and continuous vibrating sound, at this time, the housing of the earphone drives the waterproof and breathable membrane 390 through the installation shell 310 and can also generate slight vibrations, which can shake off impurities such as dust and water vapor adhering to the surface of the waterproof and breathable membrane 390, so as to reduce the entry of these impurities into the waterproof and breathable membrane 390 by finger extrusion, and ensure the integrity of the waterproof and breathable membrane 390.

[0044] As Figure 3 、 Figure 4 and Figure 6 shown in the figure, the cross-sectional shapes of both the installation cavity 312 and the pressing ring 320 are stepped. The movable range of the pressing ring 320 inside the installation cavity 312 is greater than the distance between the pressing ring 320 and the pressure sensor 330. The installation cavity 312 can not only limit the running track of the pressing ring 320, but also prevent the pressing ring 320 from detaching from the installation cavity 312, so as to achieve a good guiding and limiting effect.

[0045] As Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6As shown, the partial cross-sectional shape of the pressing ring 320 passing through the installation cavity 312 is semi-circular, and the corners of the pressing ring 320 are rounded. This can not only reduce the probability that the user is scratched by the pressing ring 320 during the process of adjusting the pressing ring 320, but also, due to the change in the contact area, it can facilitate the user to feel the foreign body sensation in the hand during the process of wearing the earphone, so as to achieve the effect of correcting the user's wearing method.

[0046] As Figure 3 , Figure 4 and Figure 6 shown, a spring 380 is provided between the installation cavity 312 and the pressing ring 320. The spring 380 is adhesively fixed to the installation cavity 312 and the pressing ring 320 through epoxy resin. The spring 380 can automatically reset the pressing ring 320 after the pressing ring 320 loses its block, avoiding the situation that the pressing ring 320 continuously contacts the pressure sensor 330, resulting in the abnormal use of the earphone; the spring 380 is a component made of neoprene material, and the shape of the spring 380 is a ring frame shape, which can extend the service life of the spring 380.

[0047] As Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 shown, a waterproof and breathable membrane 390 is adhesively bonded to one end of the installation shell 310. The waterproof and breathable membrane 390 is arranged and covers one end of the sound hole 311 facing away from the main control chip 200. On the basis of effectively blocking the entry of external water vapor into the sound hole 311, this can ensure the normal circulation of air inside and outside the earphone, so as to reduce the phenomenon of "plugged ears" during the wearing process of the earphone; the diameter of the waterproof and breathable membrane 390 is smaller than the minimum inner diameter of the pressing ring 320, and the waterproof and breathable membrane 390 is arranged inside the pressing ring 320; a groove 313 communicating with the sound hole 311 is opened at one end of the installation shell 310, and the waterproof and breathable membrane 390 is adhesively bonded inside the groove 313; the thickness of the waterproof and breathable membrane 390 is the same as that of the groove 313, and the diameter of the waterproof and breathable membrane 390 is the same as the inner diameter of the groove 313, which can avoid the waterproof and breathable membrane 390 from hindering the normal operation of the pressing ring 320.

[0048] Working principle: When the user presses in front of the sound hole 311 during the process of wearing the earphone, the pressing ring 320 contacts the finger in advance. The finger squeezes the pressing ring 320 towards the inside of the installation cavity 312. The pressing ring 320 moves along the installation cavity 312 towards the pressure sensor 330. Before the finger completely covers the waterproof and breathable membrane 390, the pressing ring 320 can squeeze the pressure sensor 330. After the pressure sensor 330 detects the pressure signal, it transmits the corresponding signal to the main control chip 200. The main control chip 200 correspondingly controls the analog switch chip 340 to turn off the ambient sound microphone 100. At this time, the ambient sound microphone 100 stops operating, which can prevent the ambient sound microphone 100 from collecting sound and actively cut off the necessary factor causing high-frequency whistling;

[0049] At the same time, the main control chip 200 correspondingly controls the power amplifier chip 350 to transmit the pre-set low-frequency sine wave to the speaker 370. Even if the speaker 370 is emitting high-frequency whistling, this can also actively perform frequency reduction processing. During the process of the speaker 370 playing the low-frequency sine wave, the speaker 370 can emit a sound with a deep and continuous vibrating feeling, which can actively warn the user that the earphone is worn incorrectly to ensure that the user can wear the earphone correctly and safely.

[0050] It should be noted that in the above description, the ambient sound microphone 100, the main control chip 200, the power amplifier chip 350, and the speaker 370 are all structures that are already available in the in-ear earphone and do not need to be separately set inside the in-ear earphone to achieve the effect of reducing the volume of the in-ear earphone. When the earphone is playing normally and transmitting and protecting a common set of the ambient sound microphone 100, the main control chip 200, the power amplifier chip 350, and the speaker 370, the designer needs to compile the following instructions in advance in the main control chip 200:

[0051] First, when the pressure sensor 330 is triggered, the main control chip 200 transmits the instruction to control the closing of the ambient sound microphone 100 and the instruction to control the speaker 370 to play the low-frequency sine wave to the analog switch chip 340 and the power amplifier chip 350 respectively;

[0052] Second, when the pressure sensor 330 is not triggered, the main control chip 200 transmits the instruction to control the ambient sound microphone 100 to always remain in the on state and the instruction to control the speaker 370 to stop playing the low-frequency sine wave to the analog switch chip 340 and the power amplifier chip 350 respectively;

[0053] The specific programming codes of the above instructions need to match the codes supported by the above electrical components and the programming software of the designer and the user, which will not be elaborated here.

[0054] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0055] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A transparent transmission structure based on in-ear headphones, comprising an ambient sound microphone (100) and a main control chip (200), wherein the ambient sound microphone (100) is communicatively connected to the main control chip (200) through an SPI interface, characterized in that, A transparent transmission protection mechanism (300) is surface-mounted on the surface of the ambient sound microphone (100); Among them, the transparent transmission protection mechanism (300) includes a mounting shell (310) and an analog switch chip (340). One end of the mounting shell (310) is provided with a sound hole (311). The ambient sound microphone (100) is embedded and installed inside the sound hole (311). One end of the mounting shell (310) is provided with a mounting cavity (312) surrounding the outside of the sound hole (311). A pressing ring (320) is slidably connected inside the mounting cavity (312). One end of the pressing ring (320) penetrates out of the mounting cavity (312). A pressure sensor (330) is embedded and installed inside the mounting cavity (312). The partial length of the pressing ring (320) penetrating out of the mounting cavity (312) is greater than the distance between the pressing ring (320) and the pressure sensor (330). The pressure sensor (330) and the analog switch chip (340) are communicatively connected to the main control chip (200) through an SPI interface. The analog switch chip (340) is communicatively connected to the ambient sound microphone (100) through an SPI interface.

2. The through-transmission structure based on in-ear headphones according to claim 1, wherein, The transparent transmission protection mechanism (300) further includes a power amplifier chip (350), a high-pass filter (360), and a speaker (370). The power amplifier chip (350) is communicatively connected to the main control chip (200) through an SPI interface. The high-pass filter (360) is communicatively connected to the power amplifier chip (350) through an SPI interface. The high-pass filter (360) is electrically connected to the speaker (370) through a shielded wire.

3. The through-transmission structure based on in-ear headphones according to claim 1, wherein, The cross-sectional shapes of the mounting cavity (312) and the pressing ring (320) are both stepped. The movable range of the pressing ring (320) inside the mounting cavity (312) is greater than the distance between the pressing ring (320) and the pressure sensor (330).

4. The through-transmission structure based on in-ear headphones according to claim 1, characterized in that, The partial cross-sectional shape of the pressing ring (320) penetrating out of the mounting cavity (312) is semicircular, and the corners of the pressing ring (320) are rounded.

5. The transparent transmission structure based on in-ear headphones according to claim 1, characterized in that, A spring (380) is arranged between the mounting cavity (312) and the pressing ring (320). The spring (380) is adhesively fixed to the mounting cavity (312) and the pressing ring (320) through epoxy resin.

6. The through-transmission structure based on in-ear headphones according to claim 5, wherein, The spring (380) is a component made of neoprene material, and the shape of the spring (380) is a ring frame shape.

7. The through-transmission structure based on in-ear headphones according to claim 1, wherein One end of the mounting shell (310) is adhesively bonded with a waterproof and breathable membrane (390). The waterproof and breathable membrane (390) is arranged and covers one end of the sound hole (311) facing away from the main control chip (200).

8. The through-transmission structure based on in-ear headphones according to claim 7, characterized in that, The diameter of the waterproof and breathable membrane (390) is smaller than the minimum inner diameter of the pressing ring (320), and the waterproof and breathable membrane (390) is arranged inside the pressing ring (320).

9. The through-transmission structure based on in-ear headphones according to claim 8, wherein, One end of the mounting shell (310) is provided with a groove (313) communicating with the sound hole (311). The waterproof and breathable membrane (390) is adhesively bonded inside the groove (313).

10. The through-transmission structure based on in-ear headphones according to claim 9, wherein The thickness of the waterproof and breathable film (390) is the same as that of the groove (313), and the diameter of the waterproof and breathable film (390) is the same as the inner diameter of the groove (313).

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