TWM564299U - Earphone with switchable inner microphone and outer microphone - Google Patents

Abstract

An earphone with switchable inner microphone and outer microphone is provided. The earphone includes an audio terminal, a housing, a speaker unit an inner microphone and an outer microphone. The housing has a chamber and an audio outlet communicated with the chamber. The speaker unit is disposed in the chamber and electrically connected to the audio terminal. The inner microphone is disposed in the chamber and electrically connected to the audio terminal, and the inner microphone is located between the speaker unit and the audio outlet. At least two of length, width and height of the inner microphone are smaller than or equal to 6 mm. The outer microphone is electrically connected to the audio terminal.

Description

Headphones that can switch between internal and external microphones

The present invention relates to a headphone microphone, and in particular to an earphone that can switch between an internal and external microphone.

With the continuous advancement of technology, personal electronic products are all moving towards the trend of light and miniaturization. Smart phones, tablets or notebook computers are indispensable for people's daily lives. Regardless of the above-mentioned electronic products, in order to allow users to listen to the sound information provided by electronic products without disturbing others, the earphone has become an essential accessory for electronic products. The earphones provide a better sound transmission for the listener, allowing the listener to clearly hear and understand the sound content, unlike the transmission of sound in the air, which can cause unclear conditions, especially during movement of the user, such as during exercise, It will not be affected by driving, intense activities or noisy environments. In addition, in order to be able to use electronic products for talking, a microphone with a microphone is also a common accessory.

In order to balance both the listening sound and the collecting sound, the conventional earphone microphone is designed to separate the earphone from the microphone, and the two are connected to each other by a signal line or a simple mechanism. In this way, the earphones can be placed close to the ear and the microphone can be placed close to the mouth. However, such a design makes the microphone also generate environmental noise, which greatly affects the clarity of the user's voice. To use active noise immunity, an anti-noise circuit is required to cause an increase in cost, and active noise suppression also destroys the fidelity of the collected sound. In addition, in order to reduce the size of the earphone microphone, another conventional earphone microphone uses Bluetooth communication, and the earphone and the microphone are disposed in the same casing. However, the microphone of this design is still designed at the end closest to the mouth, and because the distance between the microphone and the mouth becomes far, it is necessary to use a relatively high-priced directional microphone for radio reception.

The novel creation provides a headphone that can switch between internal and external microphones, and can solve the problem that the microphone has poor sound collection effect and high anti-noise cost in the prior art.

The earphone of the switchable internal and external microphones of the present invention comprises an audio terminal, a casing, a speaker unit, an internal microphone and an external microphone. The housing has a chamber and a sound outlet that are connected. The horn unit is disposed in the chamber and electrically connected to the audio terminal. The internal microphone is disposed in the chamber and electrically connected to the audio terminal, and is located between the sound outlet and the speaker unit. At least 2 of the length, width and height of the internal microphone are less than or equal to 6 mm. The external microphone is electrically connected to the audio terminal.

In an embodiment of the present invention, the horn unit separates the chamber into a front chamber and a rear chamber that are not ventilated, and the internal microphone is located in the front chamber.

In an embodiment of the novel creation, the external microphone is located in the rear chamber.

In an embodiment of the novel creation, the external microphone is located outside of the housing.

In an embodiment of the present invention, the earphone that can switch between the inner and outer microphones further includes a switch, wherein the inner microphone and the external microphone are electrically connected to the audio terminal via the switch.

In an embodiment of the present invention, the earphone that can switch between the inner and outer microphones further includes a gas permeable moisture-proof component disposed at the sound outlet.

In an embodiment of the novel creation, the sound receiving hole of the internal microphone is provided with a gas permeable moisture-proof member.

In an embodiment of the present invention, the earphone that can switch between the inner and outer microphones further includes an ear pad disposed outside the sound outlet of the casing and forming a passage connecting the sound outlet. The size of the passage is fixed or enlarged from the side close to the sound outlet to the side away from the sound outlet.

In an embodiment of the present invention, at least two of the length, width and height of the horn unit are less than or equal to 6 mm.

In an embodiment of the novel creation, the internal microphone is a microelectromechanical microphone.

In an embodiment of the present invention, there is a passage between the inner microphone and a cavity wall of the chamber for transmitting sound provided by the horn unit to the outside of the sound outlet via the passage.

In an embodiment of the novel creation, the audio terminal is a Bluetooth communication unit and has a sound feedback suppression circuit.

In an embodiment of the novel creation, the internal microphone has a microphone high-pass filter circuit with a cutoff frequency of 300 Hz or more.

In an embodiment of the novel creation, the internal microphone has a microphone high-pass filter circuit with a slope greater than or equal to 3 dB/octave.

In an embodiment of the present invention, the housing is integrally formed and the maximum outer diameter of the housing is less than or equal to 8 mm.

In an embodiment of the novel creation, the sound port of the internal microphone is facing the sound outlet.

In an embodiment of the present invention, the earphone that can switch between the inner and outer microphones further includes a printed circuit board. The printed circuit board card is placed in the chamber. The internal microphone is soldered to the printed circuit board. There is at least one passive component on the printed circuit board. The internal microphone has a microphone high pass filter circuit. The passive component is used to adjust the microphone high pass filter circuit. There is a passage between the printed circuit board and the cavity wall of the chamber for the sound provided by the speaker unit to be transmitted out of the sound port via the channel.

In an embodiment of the present invention, the earphone that can switch between the inner and outer microphones further includes a microphone lead. The chamber wall has a slot on the wall. The microphone lead is electrically connected to the internal microphone and extends to the outside through the wire slot.

In an embodiment of the novel creation, the horn unit is in airtight contact with the chamber.

Based on the above, in the earphone of the switchable internal and external microphones, the speaker unit can isolate the internal microphone from the outside noise, and the external microphone can provide a better sound receiving effect when the environment is relatively quiet.

The above described features and advantages of the present invention will become more apparent and understood from the following description.

1 is a partial cross-sectional view of an earphone with a switchable inner and outer microphone in accordance with an embodiment of the present invention. Referring to FIG. 1 , the headphone 100 of the switchable internal and external microphones of the present embodiment includes an audio terminal 160 , a housing 110 , a speaker unit 120 , an internal microphone 130 , and an external microphone 170 . The housing 110 has a chamber C10 and a sound outlet P10. The chamber C10 is in communication with the sound outlet P10. The horn unit 120 is disposed in the chamber C10 and electrically connected to the audio terminal 160. The internal microphone 130 is disposed in the chamber C10 and electrically connected to the audio terminal 160, and the internal microphone 130 is located between the sound outlet P10 and the speaker unit 120. At least two of the length, width and height of the internal microphone 130 are less than or equal to 6 mm so that the internal microphone 130 can penetrate the ear canal of the user along with the housing 110 to approach the tympanic membrane. The internal microphone 130 is used, for example, to pick up air vibrations and for utterance purposes.

The reason why the earphone 100 of the switchable inner and outer microphone of this embodiment is called the ear canal type is that a part of the volume of the earphone 100 that can switch the inner and outer microphones can be placed into the ear canal from the auricle, and the end of the ear canal is the eardrum. The average diameter of the human ear canal is greater than 8 mm, and at least two of the length, width and height of the internal microphone 130 of the present embodiment are less than or equal to 6 mm, so that the internal microphone 130 can penetrate the ear canal and approach the tympanic membrane to detect the ear canal. The sound waves transmitted inside. On the other hand, the shape of the orthographic projection of the internal microphone 130 on a certain plane is less than or equal to 6 mm, so that the internal microphone 130 can penetrate the ear canal in the direction of the orthographic projection. When the earphone 100 that can switch the inner and outer microphones is worn on the user's ear and penetrates into the ear canal, the sound outlet P10 will face and approach the eardrum of the ear, and the speaker unit 120 will hinder the transmission of environmental noise to the internal microphone 130, thus Produces passive anti-noise effects and improves sound fidelity.

In particular, the horn unit 120 prevents ambient noise from being transmitted from within the housing 110 to the internal microphone 130. In addition, since the internal microphone 130 is very close to the tympanic membrane of the user, the sound waves generated by the tympanic membrane vibration caused by the user's speech can be sensitively detected and collected by the internal microphone 130, and the human bone can also well serve the user. The emitted sound is delivered to the ear canal and collected by the internal microphone 130. Therefore, when the external environment is noisy, the earphone 100 of the switchable internal and external microphone of the embodiment can be collected by the internal microphone 130 to eliminate interference from external noise.

On the other hand, when the user is in a relatively quiet environment, the earphone 100 of the switchable internal and external microphone of the embodiment can be collected by the external microphone 170, which can provide a better sound receiving effect. Therefore, the earphone 100 of the switchable internal and external microphone of the embodiment can provide the user's best use experience in various environments.

In the present embodiment, the horn unit 120 separates the chamber C10 into a front chamber C12 and a rear chamber C14 that are not ventilated, and the internal microphone 130 is located in the front chamber C12. In other words, the portion of the horn unit 120 that is in contact with the chamber C10 is substantially a gas-tight contact, so gas cannot be transferred from the rear chamber C14 to the front chamber C12, thereby reducing the possibility that ambient noise is collected by the internal microphone 130. Sex. The external microphone 170 of the present embodiment is located outside the housing 110, but the novel creation is not limited thereto.

The audio terminal 160 of this embodiment is a common 3.5 φ connector for connecting a mobile phone or other player in a physical contact manner, but the novel creation is not limited thereto. The audio received by the audio terminal 160 from the player is transmitted to the speaker unit 120 via the cable to play the sound, and the audio received and converted by the internal microphone 130 and the external microphone 170 is transmitted to the audio terminal 160 via the cable, and then transmitted to the audio terminal 160. A mobile phone or other device records sound or delivers audio. In addition, the earphone 100 of the switchable internal and external microphone of the embodiment is exemplified by the speaker unit 120 having only a mono channel. However, in other embodiments, a speaker unit 120 may be additionally configured to provide a user's two channels. The experience of using.

The earphone 100 of the switchable inner and outer microphones of the embodiment may further include an ear pad 150 disposed outside the side of the housing 110 having the sound outlet P10, and the sound outlet P10 is located in the ear pad 150. The ear pad 150 prevents ambient noise from being transmitted from outside the housing 110 to the internal microphone 130 and provides a comfortable wearing feel.

The earphone 100 of the switchable internal and external microphone of this embodiment may further include a switch 180. Both the internal microphone 130 and the external microphone 170 are electrically connected to the audio terminal 160 via the switch 170. The switch 180 is available for the user to switch. Therefore, the user may choose to allow only the audio provided by the internal microphone 130 to be transmitted to the audio terminal 160, or may only allow the audio provided by the external microphone 170 to be transmitted to the audio terminal 160, or the internal microphone 130 and the external microphone 170. The audio is transmitted to the audio terminal 160, or the internal microphone 130 and the external microphone 170 are prohibited from being transmitted to the audio terminal 160. When the audio provided by the internal microphone 130 and the external microphone 170 is transmitted to the audio terminal 160, the two types of audio can be processed by a mobile phone or other device connected to the audio terminal 160, for example, only one of the audios is selected to be recorded or transmitted. . In this way, the user can choose how to use the internal microphone 130 and the external microphone 170 according to his or her preference.

The internal microphone 130 of the present embodiment and a cavity wall W10 of the chamber C10 have a passage T10 for transmitting the sound provided by the horn unit 120 to the outside of the sound outlet P10 via the passage T10. Therefore, the sound provided by the horn unit 120 can still be well transmitted to the tympanic membrane without being affected by the internal microphone 130.

In this embodiment, the earphone 100 that can switch between the inner and outer microphones further includes a gas permeable moisture-proof member 260 disposed at the sound outlet P12. The permeable moisture barrier element 260 also prevents foreign matter from entering the housing 110. In addition, the sound receiving hole 132 of the internal microphone 130 may also be provided with a gas permeable moisture barrier element 134. Both the breathable moisture barrier element 260 and the breathable moisture barrier component 134 may be a waterproof breathable membrane, or a moisture resistant treated mesh, or other suitable breathable moisture barrier component.

The earphone 100, which can switch between the inner and outer microphones, is placed in the ear canal and contacts the skin, so it is affected by the body temperature (36oC), and the exposed portion of the earphone 100 that can switch between the inner and outer microphones is affected by the environment. In general, when the ambient temperature is close to 0oC, moisture condensation is likely to occur due to the influence of the temperature difference, which will have a serious impact on the electrostatic microphone, and the sensitivity of the internal microphone 130 is seriously degraded. The permeable moisture barrier element 134 can improve the effects of moisture condensation.

2 is a cross-sectional view of a headset that can switch between an internal and external microphone in accordance with another embodiment of the present invention. Referring to FIG. 2, the earphone 200 of the switchable internal and external microphone of the present embodiment is similar to the earphone 100 of the switchable internal and external microphone of FIG. 1, and only the difference between the two is introduced here. In the earphone 200 of the switchable internal and external microphone of the embodiment, the audio connector 240 is a Bluetooth communication unit or other wireless communication unit. The electrical connection between the audio connector 240 and the speaker unit 120, the internal microphone 130, and the external microphone 270 may be achieved by wires and a circuit board, which are not fully illustrated in FIG. Through the audio connector 240, the earphone 200 of the switchable internal and external microphone of the embodiment transmits and receives audio with the electronic device in a Bluetooth communication manner. Optionally, the audio connector 240 has a sound feedback suppression circuit, so that only the audio recorded by the user, that is, the sound emitted by the user, is not transmitted into the audio sent by the internal microphone 130 and the external microphone 270. The sound of the receiver end emitted by the unit 120. Of course, the voice feedback suppression function can also be performed by an electronic device that communicates with the audio connector 240.

In addition, a battery can be disposed in the earphone 200 that can switch between the internal and external microphones, but is omitted in FIG. 2 and is not shown. The earphone 200, which can switch the inner and outer microphones, can be placed almost in the ear canal, which is not only more beautiful, but also relieves the burden on the user's ear. In addition, an ear pad 250 can be assembled outside the housing 210 of the earphone 200 that can switch between the inner and outer microphones. The ear pad 250 is suitably elastically deformed according to the contour of the ear canal of the user to fit the ear canal and substantially isolate the external sound. The ear pad 250 also constitutes a passage 252 that communicates with the sound port P10. The size of the passage 252 is kept fixed or enlarged from the side close to the sound outlet P10 to the side away from the sound outlet P10. With such a design, the sound waves generated by the vibration of the eardrum can be blocked as much as possible without being blocked by the ear pad 250 and mostly transferred to and collected by the internal microphone 130.

The maximum outer diameter of the housing 110 is, for example, less than or equal to 8 mm, so that the user can insert the ear canal of the user when wearing. At least two of the length, width and height of the horn unit 120 of the embodiment are, for example, less than or equal to 6 mm, and as close as possible to the internal microphone 130, so as to reduce the formation between the ear canal and the earphone 100 of the switchable inner and outer microphones. The sealed space further increases the sensitivity of the horn unit 120 and the internal microphone 130. The internal microphone 130 can be a microelectromechanical microphone, a condenser microphone, or other form of microphone that can be in the form of a cube, a pie, or other appearance. The sound receiving port 132 of the internal microphone 130 is for the sound outlet P10, that is, the sound collecting port 132 of the internal microphone 130 can be seen from the sound outlet port P10 to obtain a better sound receiving effect. The external microphone 270 and the audio connector 240 of this embodiment are both located in the rear chamber.

In addition, the internal microphone 130 of the embodiment may have a built-in microphone high-pass filter circuit 136, or a software or circuit that provides microphone signal compensation by a connected electronic device, so that the vibration of the eardrum may be amplified below 500 Hz and may be more than 2 KHz. The problem of attenuation. Specifically, the cut-off frequency of the microphone high-pass filter circuit 136 of the internal microphone 130 may be greater than or equal to 300 Hz, and the slope thereof may be greater than or equal to 3 dB/octave. The slope of the microphone high-pass filter circuit 136 means that its power gain varies with frequency, and the power gain variation of each octave is greater than or equal to 3 dB.

3A is a partial cross-sectional view of a headphone of a switchable internal and external microphone according to another embodiment of the present invention, and FIG. 3B is a partial cross-sectional view of the housing of the headphone of the switchable internal and external microphone of FIG. 3A. Referring to FIG. 3A and FIG. 3B, the earphone 300 of the switchable internal and external microphone of the present embodiment is similar to the earphone 200 of the switchable internal and external microphone of FIG. 2, and only the difference between the two is introduced here. The earphone 300 of the switchable internal and external microphone of this embodiment further includes a printed circuit board 370. The internal microphone 130 is soldered to the printed circuit board 370, for example using surface mount technology (SMT). The printed circuit board 370 is stuck in the chamber C20 of the housing 310. For example, the cavity wall W20 of the chamber C20 has a card slot G12, and the protrusion on the outer side of the printed circuit board 370 is just seated in the card slot G12. For the convenience of assembly, it is also possible to design the card slot G12 to be closed on the side close to the sound outlet P20 and open on the other side. In this manner, the printed circuit board 370 can be slid in from the open side of the card slot G12 and stopped on the closed side of the card slot G12. Moreover, by adjusting the distance between the closed side of the card slot G12 and the sound outlet P20, the distance between the internal microphone 130 and the sound outlet P20 can be controlled to an ideal design value.

The printed circuit board 370 of the present embodiment has, for example, at least one passive component 374. Passive component 374 can be one or a combination of a capacitor, a resistor, or other passive component. The passive component 374 is used to adjust the microphone high pass filter circuit 136 of the internal microphone 130.

In addition, the printed circuit board 370 and the cavity wall W20 of the chamber C20 have a passage T20 for the sound provided by the horn unit 120 to be transmitted to the outside of the sound outlet P20 via the passage T20. Moreover, by changing the cross-sectional shape and size of the passage T20, the effect of adjusting the sound quality emitted by the horn unit 120 can also be achieved. Additionally, the headset microphone 300 further includes a microphone lead 380. The cavity wall W20 of the chamber C20 has a wire groove G14. The microphone lead 380 is electrically connected to the microphone 130, and the microphone lead 380 is extended and connected to the audio terminal 392 through the wire slot G14 to transmit signals and receive power. External microphone 394 is also coupled to audio terminal 392. In other embodiments, the microphone lead 380 can also be connected to another printed circuit board 372, and the lead is pulled from the printed circuit board 372 to the outside. The horn unit 120 is disposed on the printed circuit board 372.

In summary, in the earphone of the switchable internal and external microphones, the internal microphone and the external microphone are simultaneously provided. The internal microphone can be smoothly tuned in a noisy environment by the speaker unit being isolated from the outside noise, and the external microphone can provide better radio reception when the environment is relatively quiet.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the novel creation, and any person skilled in the art can make some changes without departing from the spirit and scope of the novel creation. Retouching, the scope of protection of this new creation is subject to the definition of the scope of the patent application attached.

100, 200, 300‧‧‧ headphones that can switch between internal and external microphones
110, 210, 310‧‧‧ housing
120‧‧‧ horn monomer
130‧‧‧Internal microphone
132‧‧‧ Receiving port
134, 260‧‧‧ breathable moisture-proof components
136‧‧‧Microphone high-pass filter circuit
150, 250‧‧ ear pads
160, 240, 392‧‧‧ audio connectors
170, 270, 394‧‧‧ external microphone
180‧‧‧ switch
C10, C20‧‧‧ chamber
C12‧‧‧ front chamber
C14‧‧‧ rear chamber
P10, P12, P20‧‧‧ sound outlet
W10, W20‧‧‧ cavity wall
T10, T20, 252‧‧‧ channels
260‧‧‧Dust net
370, 372‧‧‧ Printed circuit boards
374‧‧‧ Passive components
380‧‧‧Microphone lead
G12‧‧‧ card slot
G14‧‧‧ wire trough

1 is a partial cross-sectional view of an earphone with a switchable inner and outer microphone in accordance with an embodiment of the present invention. 2 is a cross-sectional view of a headset that can switch between an internal and external microphone in accordance with another embodiment of the present invention. 3A is a partial cross-sectional view of an earphone with switchable inner and outer microphones in accordance with yet another embodiment of the present invention. 3B is a partial cross-sectional view of the housing of the earphone of the switchable inner and outer microphone of FIG. 3A.

Claims (19)

An earphone capable of switching internal and external microphones, comprising: an audio terminal; a casing having a communicating chamber and an outlet; a speaker unit disposed in the chamber and electrically connected to the audio terminal; An internal microphone disposed in the chamber and electrically connected to the audio terminal, and located between the sound outlet and the speaker unit, wherein at least two of the length, width and height of the internal microphone are less than or equal to 6 mm; And an external microphone electrically connected to the audio terminal. The earphone of the switchable internal and external microphone according to claim 1, wherein the speaker unit separates the chamber into a front chamber and a rear chamber that are not ventilated, and the internal microphone is located in the front chamber. . The earphone of the switchable internal and external microphone according to claim 2, wherein the external microphone is located in the rear chamber. The earphone of the switchable internal and external microphone according to claim 1, wherein the external microphone is located outside the casing. The earphone of the switchable internal and external microphones of claim 1, further comprising a switch, wherein the internal microphone and the external microphone are electrically connected to the audio terminal via the switch. The earphone of the switchable internal and external microphones according to claim 1 further includes a ventilating moisture-proof component disposed at the sound outlet. The earphone of the switchable internal and external microphone according to claim 1, wherein the sound hole of the internal microphone is provided with a gas permeable and moisture-proof member. The earphone of the switchable inner and outer microphones according to claim 1, further comprising an ear pad disposed outside the sound outlet of the casing and forming a passage connecting the sound outlet, the channel being close in size One side of the sound outlet is fixed or enlarged toward a side away from the sound outlet. The earphone of the switchable inner and outer microphone according to claim 1, wherein at least two of the length, width and height of the speaker unit are less than or equal to 6 mm. The earphone of the switchable internal and external microphones as claimed in claim 1, wherein the internal microphone is a micro electromechanical microphone. The earphone of the switchable internal and external microphone according to claim 1, wherein the internal microphone and a cavity wall of the chamber have a passage for the sound provided by the speaker unit to be transmitted through the channel Until the sound outlet. The earphone of the switchable internal and external microphones as claimed in claim 1, wherein the audio terminal is a Bluetooth communication unit and has a sound feedback suppression circuit. The earphone of the switchable internal and external microphone according to claim 1, wherein the internal microphone has a microphone high-pass filter circuit, and the cutoff frequency is greater than or equal to 300 Hz. The earphone of the switchable internal and external microphone according to claim 1, wherein the internal microphone has a microphone high-pass filter circuit with a slope greater than or equal to 3 dB/octave. The earphone of the switchable inner and outer microphone according to claim 1, wherein the casing is integrally formed, and the maximum outer diameter of the casing is less than or equal to 8 mm. The earphone of the switchable internal and external microphone according to claim 1, wherein the sound port of the internal microphone is opposite to the sound outlet. The earphone of the switchable internal and external microphone according to claim 1, further comprising a printed circuit board, wherein the printed circuit board is placed in the chamber, and the internal microphone is soldered to the printed circuit board, the printed circuit The board has at least one passive component, the internal microphone has a microphone high-pass filter circuit, the passive component is used to adjust the microphone high-pass filter circuit, and the printed circuit board has a channel between the cavity wall of the chamber and the The sound provided by the speaker unit is transmitted out of the sound outlet via the channel. The earphone of the switchable internal and external microphone according to claim 1, further comprising a microphone lead, wherein the cavity wall of the chamber has a wire slot, and the microphone lead is electrically connected to the internal microphone and passes through the wire slot. Extend to the outside world. The earphone of the switchable inner and outer microphone according to claim 1, wherein the speaker unit is in airtight contact with the chamber.