阅读说明：本技术 一种电子设备 (Electronic equipment ) 是由 游利文 林翔 于 2021-09-09 设计创作，主要内容包括：本发明实施例提供了一种电子设备,包括中框以及麦克风；其中,所述中框包括边框以及由边框围合形成的容纳腔,所述麦克风设置于所述容纳腔内；所述边框设置有收音孔,所述边框内还设置有第一传输通道和第二传输通道；所述第二传输通道的一端与所述收音孔连通,另一端与所述麦克风连接；所述第一传输通道与所述收音孔连通,所述收音孔与所述第一传输通道之间还设置有通断控制结构,所述通断控制结构用于控制所述收音孔与所述第一传输通道导通或者断开。由此避免强气流对麦克风造成影响,使得收音失真,避免了麦克风失效无法工作,还保证了声音的传输,提升了用户体验。(The embodiment of the invention provides electronic equipment, which comprises a middle frame and a microphone; the middle frame comprises a frame and an accommodating cavity formed by enclosing the frame, and the microphone is arranged in the accommodating cavity; the frame is provided with a sound receiving hole, and a first transmission channel and a second transmission channel are also arranged in the frame; one end of the second transmission channel is communicated with the sound receiving hole, and the other end of the second transmission channel is connected with the microphone; the first transmission channel is communicated with the sound receiving hole, an on-off control structure is further arranged between the sound receiving hole and the first transmission channel and is used for controlling the sound receiving hole to be connected with or disconnected from the first transmission channel. Therefore, the influence of strong airflow on the microphone is avoided, reception distortion is caused, the microphone is prevented from being out of work, sound transmission is guaranteed, and user experience is improved.)

1. An electronic device, comprising: a middle frame and a microphone; wherein the content of the first and second substances,

the middle frame comprises a frame and an accommodating cavity formed by enclosing the frame, and the microphone is arranged in the accommodating cavity;

the frame is provided with a sound receiving hole, and a first transmission channel and a second transmission channel are also arranged in the frame;

one end of the second transmission channel is communicated with the sound receiving hole, and the other end of the second transmission channel is connected with the microphone;

the first transmission channel is communicated with the sound receiving hole, an on-off control structure is arranged between the sound receiving hole and the first transmission channel and is used for controlling the connection or disconnection of the sound receiving hole and the first transmission channel.

2. The electronic device of claim 1, wherein the sound-receiving hole is disconnected from the first transmission channel when the velocity of the airflow in the sound-receiving hole is less than or equal to the preset value;

and when the air flow speed in the sound receiving hole is larger than the preset value, the sound receiving hole is communicated with the first transmission channel.

3. The electronic device of claim 1, wherein the on-off control structure comprises: the baffle is arranged close to the hole bottom of the sound receiving hole and movably connected to the hole bottom of the sound receiving hole, and the baffle can be switched between a first position and a second position;

in the first position, the baffle abuts against the bottom of the sound receiving hole, and the sound receiving hole is disconnected with the first transmission channel; in the second position, the baffle releases the support of the sound receiving hole, and the sound receiving hole is communicated with the first transmission channel.

4. The electronic device of claim 3, wherein the on-off control structure further comprises an elastic member; wherein the content of the first and second substances,

the elastic piece is arranged in the first transmission channel and connected with the baffle, and the elastic piece is used for providing elastic force for the baffle so as to enable the baffle to be switched between the first position and the second position.

5. The electronic device of claim 4, wherein the baffle is slidably connected to the first transmission channel, and under the elastic force, the baffle is slidable toward the bottom of the acoustic hole to the first position, or the baffle is slidable away from the bottom of the acoustic hole to the second position.

6. The electronic device of claim 5, wherein the elastic member is a spring, one end of the spring is connected to the side wall of the first transmission channel, and the other end of the spring is connected to the baffle;

the compression direction of the spring is parallel to the axial direction of the sound receiving hole, and the spring is used for driving the baffle to slide in the first transmission channel.

7. The electronic device of claim 4, further comprising a rotating shaft, wherein the baffle is rotatably connected to the bottom of the sound receiving hole through the rotating shaft, and under the elastic force, the baffle can rotate to the second position toward the bottom of the sound receiving hole, or the baffle can rotate to the first position away from the bottom of the sound receiving hole.

8. The electronic device of claim 7, wherein the elastic member is a torsion spring, the torsion spring is sleeved on the rotating shaft and abuts against the baffle, and the torsion spring is used for driving the baffle to rotate around the rotating shaft.

9. The electronic device according to claim 1, wherein one end of the first transmission channel communicates with the acoustic opening, and the other end of the first transmission channel communicates with the accommodating chamber.

10. The electronic device according to any one of claims 1 to 9, further comprising a circuit board disposed in the accommodating cavity and connected to the frame;

the microphone is connected to the circuit board;

the circuit board is provided with a through hole, one end of the through hole is communicated with the other end of the second transmission channel, and the other end of the through hole is connected with the microphone.

Technical Field

The present invention relates to the field of electronic information technologies, and in particular, to an electronic device.

Background

Along with the increasing popularization of intelligent electronic equipment, the life of people is more and more closely related to the electronic equipment, the electronic equipment provides various conveniences for the life of people, the communication of the daily life of people is more convenient, and the life quality of people is improved. In order to realize functions of recording, video, voice, video, and calling, a microphone is disposed in the electronic device.

In the prior art, a sound hole is formed in a middle frame of an electronic device, the sound hole is connected with a microphone, and a sound signal enters the microphone through the sound hole, so that functions of recording, video recording, voice, video, conversation and the like are realized.

In the course of studying the above prior art, the inventor found that when a user is exposed to a strong airflow environment, such as windy weather, opening a window during driving, riding a bicycle at a fast speed, seaing, blowing an electric fan, and removing dust from an electronic device with an air gun, the strong airflow enters the microphone through the sound hole, and a large impact is applied to the microphone. When a user uses the electronic equipment, the electronic equipment has great airflow noise, so that reception distortion is caused, the function of the microphone for transmitting sound signals is influenced, and even the microphone is damaged, so that the microphone fails to work normally. The user experience is influenced due to a great deal of inconvenience brought to the use of the user.

Disclosure of Invention

The application aims to provide electronic equipment to solve the problems that a microphone in the existing electronic equipment is easy to receive sound receiving distortion and damage caused by strong airflow.

In order to solve the above technical problem, the present application discloses an electronic device, including: a middle frame and a microphone; wherein the content of the first and second substances,

the middle frame comprises a frame and an accommodating cavity formed by enclosing the frame, and the microphone is arranged in the accommodating cavity;

the frame is provided with a sound receiving hole, and a first transmission channel and a second transmission channel are also arranged in the frame;

one end of the second transmission channel is communicated with the sound receiving hole, and the other end of the second transmission channel is connected with the microphone;

the first transmission channel is communicated with the sound receiving hole, an on-off control structure is arranged between the sound receiving hole and the first transmission channel and is used for controlling the connection or disconnection of the sound receiving hole and the first transmission channel.

The embodiment of the invention has the following advantages:

in the embodiment of the application, the sound receiving hole is arranged by deviating from the frame, and the first transmission channel and the second transmission channel are also arranged in the frame; one end of the second transmission channel is communicated with the side wall of the sound receiving hole, and the other end of the second transmission channel is connected with the microphone so as to transmit the sound signal in the sound receiving hole to the microphone. The first transmission channel is communicated with the hole bottom of the sound receiving hole, an on-off control structure is further arranged between the hole bottom of the sound receiving hole and the first transmission channel and used for controlling the sound receiving hole and the first transmission channel to be connected or disconnected according to air flow speed. Therefore, when the electronic equipment is in a strong airflow environment, if the airflow speed in the sound receiving hole is too high, the on-off control structure can control the conduction of the sound receiving hole and the first transmission channel, so that the airflow is discharged along the first transmission channel, and sound receiving distortion and damage of the microphone caused by strong airflow are avoided.

Additional aspects and advantages of the 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.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic diagram of a first electronic device according to the present invention;

FIG. 2 is a schematic structural diagram of a second electronic device according to the present invention;

FIG. 3 is a schematic structural diagram of a third electronic device according to the present invention;

FIG. 4 is a schematic diagram of a fourth electronic device according to the present invention;

FIG. 5 is a schematic diagram of a spring structure of the electronic device of the present invention;

FIG. 6 is a schematic view of a torsion spring structure of the electronic device of the present invention;

FIG. 7 is a graphical illustration of the linear relationship of airflow velocity to microphone distortion percentage for an electronic device of the present invention;

description of reference numerals: a frame-100; a housing cavity-200; a microphone-300; a sound receiving hole-110; a first transmission channel-120; a second transmission channel-130; -a baffle-140; a spring-150; torsion spring-160; a circuit board-210; a through hole-211.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1 to 4, schematic structural diagrams of an electronic device of the present invention are shown, which may specifically include: a middle frame and a microphone 300; the middle frame comprises a frame 100 and an accommodating cavity 200 formed by enclosing the frame 100, and the microphone 300 is arranged in the accommodating cavity 200 and converts a sound signal into an electric signal; the frame 100 is provided with a sound receiving hole 110, and a first transmission channel 120 and a second transmission channel 130 are further arranged in the frame 100; one end of the second transmission channel 130 is communicated with the sound receiving hole 110, and the other end is connected with the microphone 300, so that the transmission of sound signals is realized; the first transmission channel 120 is communicated with the sound receiving hole 110, and an on-off control structure is further arranged between the sound receiving hole 110 and the first transmission channel 120 and is used for controlling the connection or disconnection between the sound receiving hole 110 and the first transmission channel 120.

In the embodiment of the application, the sound receiving hole 110 is arranged away from the frame 100, and the first transmission channel 120 and the second transmission channel 130 are further arranged in the frame 100; one end of the second transmission channel 130 communicates with the side wall of the sound receiving hole 110, and the other end is connected to the microphone 300, so as to transmit the sound signal in the sound receiving hole 110 to the microphone 300. The first transmission channel 120 is communicated with the hole bottom of the sound receiving hole 110, and an on-off control structure is further arranged between the hole bottom of the sound receiving hole 110 and the first transmission channel 120 and is used for controlling the connection or disconnection of the sound receiving hole 110 and the first transmission channel 120 according to the air flow speed. Thus, when the electronic device is in a strong airflow environment, if the airflow speed in the sound receiving hole 110 is too high, the on-off control structure can control the conduction between the sound receiving hole 110 and the first transmission channel 120, so that the airflow is discharged along the first transmission channel 120, and sound receiving distortion and damage to the microphone 300 caused by strong airflow are avoided.

When the strong airflow enters the middle frame 100 of the electronic device from the sound receiving hole 110, the strong airflow directly penetrates to the bottom of the sound receiving hole 110, so that the first transmission channel 120 is communicated with the bottom of the sound receiving hole 110, and the strong airflow can be discharged along the first transmission channel 120. The second transmission channel 130 is connected to the side wall of the acoustic opening 110, and extends from the side wall to the microphone 300 through a certain angle (90 ° in fig. 1 to 4), so that strong airflow does not cause strong impact on the microphone 300 to send airflow noise, and the sound signal can be smoothly transmitted to the microphone 300 along the second transmission channel 130, thereby ensuring the sound transmission effect.

In particular, everyday strong airflow environments may include when a user is in a windy weather, driving a vehicle, windowing, riding a bike at a faster speed, seagoing, blowing an electric fan, etc., and when a gun is used to remove dust from an electronic device.

Alternatively, in the case where the velocity of the air flow in the acoustic opening 110 is less than or equal to the preset value, the acoustic opening 110 is disconnected from the first transmission passage 120; when the speed in the acoustic opening 110 is greater than the predetermined value, the acoustic opening 110 is connected to the first transmission channel 120.

In the embodiment of the present invention, as shown in fig. 7, when the velocity of the airflow in the sound receiving hole 110 is less than or equal to the predetermined value, which indicates that the velocity of the airflow does not affect the function of the microphone 300, the sound receiving hole 110 is disconnected from the first transmission channel 120 and is only connected to the second transmission channel 130, so that the sound signal is transmitted to the microphone 300 along the second transmission channel 130, and the transmission effect of the sound signal is ensured. When the speed in the acoustic opening 110 is greater than the preset value, it indicates that the airflow speed at this time may affect the function of the microphone 300, and the acoustic opening 110 is communicated with the first transmission channel 120, so that the airflow is discharged along the first transmission channel 120, thereby preventing the microphone 300 from being affected by strong airflow, causing sound receiving distortion, and also preventing the microphone 300 from failing to work normally due to failure. Therefore, the microphone 300 is protected from being damaged, the transmission effect of the sound signal is guaranteed, and the user experience is improved.

In an embodiment of the present invention, the preset value of the air flow velocity may include an air flow velocity value causing distortion of the microphone 300. For example, when the airflow velocity is 63m/s or less, the distortion percentage of the microphone 300 is within 1%, and when the airflow velocity is greater than 63m/s, the distortion percentage of the microphone 300 exceeds 1% and exhibits a straight-line rise, indicating that the airflow velocity 63m/s is a critical point of the microphone 300 distortion. The preset value of the air flow velocity can be set to 63 m/s.

Specifically, under a standard state, the air pressure is 1013hPa, the temperature is 15 ℃, the gravity r is 0.01225kN/m, and the gravity acceleration g at the latitude 45 degrees of the earth is 9.8 m/s;

the conversion formula of the air speed and the air pressure is as follows:

wp is 0.5 ro v (formula one)

Wherein wp is wind pressure in kN/m, ro is air density in kg/m, v is air velocity in m/s, and r is gravity;

since the relationship between air density (ro) and gravity (r) is:

ro-g (formula two)

Therefore, there are:

ro is r/g (formula three)

Substituting ro into the formula I to obtain a standard wind pressure formula:

wp＝0.5·r·v²/g (formula four)

Substituting r and g into a standard wind pressure formula to obtain a general formula for calculating wind pressure through the air speed:

wp＝v²/1600 (formula five)

The air pressure wp generated at the acoustic receiving hole 110 by the air velocity is 2.48kN/m by substituting the air velocity v of 63m/s into a general formula for calculating the air pressure by the air velocity²；

Taking the hole diameter of the standard sound receiving hole as 1mm as an example, the circular area calculation formula is as follows:

S＝πR²(formula six)

Wherein R is the hole radius of the acoustic hole;

the pressure received by the sound receiving hole is as follows:

F＝S·wp＝πR²·wp＝πR²v2/1600 (formula seven);

r is 0.5mm, wp is 2.48kN/m²Substituting the formula four, F may be calculated to be 0.195N;

that is, the wind pressure at this time was 0.195N.

In practical applications, the airflow speed that can be sustained by the microphones varies according to the quality of the microphones, and the above is only an example. The specific numerical value of the preset value in the embodiment of the present invention may not be limited.

Optionally, the on-off control structure comprises: the baffle 140 is arranged close to the hole bottom of the acoustic opening 110 and movably connected to the hole bottom of the acoustic opening 110, and the baffle 140 can be switched between a first position and a second position; in the first position, the baffle 140 abuts against the bottom of the sound receiving hole 110, and the sound receiving hole 110 is disconnected from the first transmission channel 120; in the second position, the baffle 140 releases the holding of the acoustic opening 110, and the acoustic opening 110 is communicated with the first transmission channel 120.

In the embodiment of the present invention, the baffle 140 is movably connected to the hole bottom of the sound receiving hole 110, when the air flow velocity in the sound receiving hole 110 is less than or equal to the predetermined value, the baffle 140 is located at the first position and abuts against the hole bottom of the sound receiving hole 110, so that the sound receiving hole 110 is disconnected from the first transmission channel 120 and is only connected to the second transmission channel 130, and the sound signal is transmitted to the microphone 300 along the second channel, thereby ensuring the transmission effect of the sound signal. When the air velocity in the acoustic opening 110 is greater than the preset value, the baffle 140 is located at the second position, the acoustic opening 110 is released from being supported, the acoustic opening 110 is communicated with the first transmission channel 120, so that the air flow is discharged along the first transmission channel 120, the influence of strong air flow on the microphone 300 is avoided, the sound receiving distortion is avoided, and the microphone 300 is prevented from failing to work normally due to failure. Thereby, the protection microphone 300 is damaged without being affected, while ensuring the transmission effect of the sound signal.

Specifically, in the embodiment of the present invention, the baffle 140 may be rectangular, square, circular, oval, and the like, and the specific shape of the baffle 140 may not be limited in the embodiment of the present invention.

Optionally, the on-off control structure further comprises an elastic member; the elastic member is disposed in the first transmission channel 120 and connected to the blocking plate 140, and the elastic member is configured to provide an elastic force to the blocking plate 140 so as to switch the blocking plate 140 between the first position and the second position.

In the embodiment of the present invention, by arranging the elastic member in the on-off control structure, the elastic member is connected to the baffle 140, when the air velocity in the acoustic opening 110 is greater than the preset value, the air flow generates a pressure on the baffle 140, the pressure acts on the baffle 140, under the elastic action of the elastic member, the baffle 140 releases the support on the acoustic opening 110, the baffle 140 is located at the second position, and the conduction between the acoustic opening 110 and the first transmission channel 120 is opened. When the air flow velocity in the acoustic opening 110 is less than or equal to the preset value, the pressure of the air flow on the baffle 140 is reduced, and under the elastic force of the elastic member, the baffle 140 restores to abut against the acoustic opening 110, and the baffle 140 is located at the first position, so that the acoustic opening 110 is disconnected from the first transmission channel 120.

Alternatively, the baffle 140 may be slidably connected to the first transmission passage 120, and under the elastic force, the baffle 140 may slide toward the bottom of the acoustic opening 110 to the first position, or the baffle 140 may slide away from the bottom of the acoustic opening 110 to the second position.

Alternatively, where the acoustic opening 110 communicates with the first transmission channel 120, the larger the air flow velocity in the acoustic opening 110, the larger the cross-sectional area where the acoustic opening 110 communicates with the first transmission channel 120. The on-off control structure is arranged at the conduction position of the sound receiving hole 110 and the first transmission channel 120, when the air flow speed in the sound receiving hole 110 is higher, the air flow pressure is higher, the moving distance of the on-off control structure towards the hole bottom of the sound receiving hole 110 is larger by overcoming the elasticity, the sectional area of the conduction position of the sound receiving hole 110 and the first transmission channel 120 is larger, and the air flow is favorably discharged from the accommodating cavity 200 along the conduction position.

In the embodiment of the present invention, the blocking plate 140 is slidably connected to the first conveying channel 120, so that the blocking plate 140 can be smoothly switched between the first position and the second position under the action of the elastic member. When the air velocity in the acoustic opening 110 is greater than the predetermined value, the baffle 140 slides to the second position under the elastic force of the elastic member, the acoustic opening 110 is released from being supported, and the communication between the acoustic opening 110 and the first transmission channel 120 is opened. When the air flow velocity in the acoustic opening 110 is less than or equal to the predetermined value, the baffle 140 slides to the first position under the elastic force of the elastic member, and abuts against the bottom of the acoustic opening 110, so that the acoustic opening 110 is disconnected from the first transmission channel 120.

Optionally, the elastic member is a spring 150, one end of the spring 150 is connected to the sidewall of the first transmission channel 120, and the other end is connected to the baffle 140; the compression direction of the spring 150 is parallel to the axial direction of the acoustic opening 110, and the spring 150 is used for driving the baffle 140 to slide in the first transmission channel 120.

In the embodiment of the present invention, the elastic member is a spring 150, the forced compression direction of the elastic member is parallel to the axial direction of the acoustic opening 110, when the air velocity in the acoustic opening 110 is greater than the preset value, the spring 150 is compressed by pressure, the driving baffle 140 slides to the second position in the first transmission channel 120 along the axial direction of the acoustic opening 110, the abutting of the acoustic opening 110 is released, and the conduction between the acoustic opening 110 and the first transmission channel 120 is opened. When the air flow velocity in the acoustic opening 110 is less than or equal to the predetermined value, the spring 150 is restored to extend due to the reduced pressure, and the driving baffle 140 slides to the first position in the first transmission channel 120 along the axis parallel direction of the acoustic opening 110, and abuts against the bottom of the acoustic opening 110, so that the acoustic opening 110 is disconnected from the first transmission channel 120.

Specifically, the spring 150 may be as shown in FIG. 5, with the spring constant expressed in k in kgf/mm, x being the amount of compression of the spring, and F being the spring force of the spring.

When the spring 150 is compressed, the spring constant is given by the formula for each 1mm increase in compression:

k＝(G·d3·d)/(8·Dm³nc) (formula eight)

Where G is the stiffness modulus of the wire rod, for example, G of piano wire is 8000, G of stainless wire is 7300, G of phosphor bronze wire is 4500, and G of brass wire is 3500;

d is the wire diameter; do is OD is outer diameter; di ID; dm is MD, medium diameter is Do-d; n is the total number of turns; nc is the number of effective turns N-2.

The following is an example of the spring constant calculation:

for example, the wire diameter d is 0.1mm, the outer diameter Do is 1.2mm, the total number of turns is 5.5 turns, and the steel wire material is selected from piano steel wire G is 8000;

the relationship between kgf and N is: 1N ═ 0.102 kgf; 1kgf ═ 9.8N;

substituting the above values into equation eight can obtain: k is 0.0215kgf/mm is 0.21N/mm

The spring force F of the spring is proportional to the amount x of compression of the spring:

f ═ k. x (formula nine)

According to the formula four, the formula eight and the formula nine, the relational expression of the airflow speed v and the compression amount x is obtained as follows:

x＝F/k＝πR2·v2/(1600·(G·d2)/(8·Dm³·Nc))

＝πR2·v2·Dm³Nc/(200G d3 d) (equation ten)

According to the formula nine, the initial compression amount of the spring is as follows:

x 0-0.195/0.21-0.93 mm, the force balance point of the spring is 0.195N.

When the air velocity v is greater than 63m/s, that is, the force F applied to the spring is greater than 0.195N, the spring compression amount x is greater than x0, and Δ x (spring compression variation) is x-x0 greater than 0, the driving baffle 140 slides to the second position in the first transmission channel 120 along the axis parallel direction of the acoustic opening 110, and the baffle 140 is released from abutting against the acoustic opening 110, so that the acoustic opening 110 is communicated with the first transmission channel 120, as shown in fig. 2.

The greater the air flow velocity, the greater the compression x and the greater the Δ x. The air flow is blown out through the first transmission channel 120, thereby reducing the air flow reaching the microphone 300, and thus improving the distortion and damage of the microphone 300 at a strong air flow speed.

When the airflow is reduced or disappeared, the spring 150 is compressed by x-x0 and Δ x-0 due to its own elastic force, and the electronic device returns to the state shown in fig. 1.

How the spring works is specifically illustrated above, the material of the spring may include piano wire, stainless steel wire, phosphor bronze wire, and the like, and the specific material of the spring in the embodiment of the present invention may not be limited.

Optionally, the electronic device further includes a rotating shaft 160, the baffle 140 is rotatably connected to the bottom of the acoustic opening 110 through the rotating shaft 160, and under the elastic force, the baffle 140 may rotate to the second position toward the bottom of the acoustic opening 110, or the baffle 140 may rotate to the first position away from the bottom of the acoustic opening 110.

In the embodiment of the present invention, the baffle 140 is rotatably connected to the bottom of the acoustic opening 110 through the rotating shaft 160 by providing the rotating shaft 160 in the electronic device. When the air velocity in the acoustic opening 110 is greater than the preset value, the air flow generates a pressure on the baffle 140, the pressure acts on the baffle 140, and under the elastic action of the elastic member, the baffle 140 rotates to the second position toward the bottom of the acoustic opening 110, so that the baffle 140 releases the support of the acoustic opening 110, and the communication between the acoustic opening 110 and the first transmission channel 120 is opened. When the air flow velocity in the acoustic opening 110 is less than or equal to the preset value, the pressure of the air flow on the baffle 140 is reduced, and under the elastic action of the elastic member, the baffle 140 rotates to the first position away from the hole bottom direction of the acoustic opening 110, so that the baffle 140 restores the support of the acoustic opening 110, and the conduction between the acoustic opening 110 and the first transmission channel 120 is disconnected.

Optionally, the elastic member is a torsion spring 160, the torsion spring 160 is sleeved on the rotating shaft and abuts against the baffle 140, and the torsion spring 160 is used for driving the baffle 140 to rotate around the rotating shaft 160.

In the embodiment of the present invention, the elastic member is a torsion spring 160, and the torsion spring 160 is sleeved on the rotating shaft and abuts against the baffle 140, so as to drive the baffle 140 to rotate around the rotating shaft. When the air velocity in the acoustic opening 110 is greater than the predetermined value, the air flow generates a pressure on the baffle 140, the pressure acts on the baffle 140, and under the elastic force of the torsion spring 160, the baffle 140 twists to the second position toward the bottom of the acoustic opening 110, so that the baffle 140 releases the support of the acoustic opening 110, and the communication between the acoustic opening 110 and the first transmission channel 120 is opened. When the air velocity in the acoustic opening 110 is less than or equal to the predetermined value, the pressure of the air flow on the baffle 140 is reduced, and under the elastic force of the torsion spring 160, the baffle 140 is twisted to the first position in the direction away from the bottom of the acoustic opening 110, so that the baffle 140 restores the support of the acoustic opening 110, and the acoustic opening 110 is disconnected from the first transmission channel 120.

Specifically, the torsion spring 160 may be as shown in FIG. 6, with the torsion spring constant expressed in K in kgf/mm.

When the torsion spring 160 is twisted, the torsion spring constant is formulated as:

k ═ E · d3 · d)/(1167 · Dm · p · N · R) (formula eleven)

Wherein E ═ the modulus of stiffness of the wire: for example, piano wire E21000, stainless wire E19400, phosphor bronze wire E11200, brass wire E11200;

d is the wire diameter; do is OD is outer diameter; di ID; dm is MD, medium diameter is Do-d; n is the total number of turns; s is the arm of force of the load; p is 3.1416; the torsion spring constant of the torsion spring is related to the material and dimensions selected.

The elasticity F of the torsion spring is in direct proportion to the torsion angle of the torsion spring:

f ═ K · α (formula twelve)

According to the formula IV, the formula eleven and the formula twelfth, the relation between the airflow speed v and the compression angle alpha is obtained as follows:

α ═ F/K ═ pi R2 · v2/(1600 · (E · d3 · d)/(1167 · Dm · p · N · S)) (equation thirteen)

An airflow velocity v for saturating the microphone is 63m/s, the airflow velocity generates a pressure at the microphone port of 0.195N, and according to the formula thirteen of the relationship between the airflow velocity v and the compression angle α, the initial torsion angle of the torsion spring in the electronic device is:

α0＝0.195/((E·d3·d)/(1167·Dm·p·N·R))

1108.65 · Dm · p · N · R/(E · d3 · d) (formula fourteen)

The preset air flow velocity v of the sound-absorbing hole obtained above is 63m/s, when v is greater than 63m/s, that is, the force F received by the torsion spring is greater than 0.195N, the torsion spring is twisted, the torsion angle α of the torsion spring is greater than α 0, and Δ α (torsion angle variation of the torsion spring) is α - α 0 greater than 0, at this time, the torsion spring 160 drives the baffle 140 to twist to the second position, the baffle 140 is released from abutting against the sound-absorbing hole 110, so that the sound-absorbing hole 110 is communicated with the first transmission channel 120, as shown in fig. 4.

The greater the airflow velocity, the greater the twist angle α and the greater Δ α. The airflow is discharged through the first transmission channel 120, thereby reducing the airflow received to the microphone 300, and thus improving distortion and damage of the microphone 300 at a strong airflow speed.

When the airflow is reduced or disappears, the torsion spring 160 compresses the spring by an angle α 0 and Δ α 0 due to its own elastic force, and the electronic device returns to the state shown in fig. 3.

The above description specifically illustrates how the torsion spring 160 works, and the material of the torsion spring may include piano wire, stainless steel wire, phosphor bronze wire, and the like, and the specific material of the torsion spring in the embodiment of the present invention may not be limited.

Alternatively, one end of the first transmission passage 120 communicates with the acoustic opening 110, and the other end of the first transmission passage 120 communicates with the accommodating chamber 200. By communicating the sound receiving hole 110 and the accommodating chamber 200 through the first transmission passage 120, the air flow entering from the sound receiving hole 110 can be discharged from the accommodating chamber 200 through the first transmission passage 120 without affecting the microphone 300.

Optionally, the electronic device further includes a circuit board 210, where the circuit board 210 is disposed in the accommodating cavity 200 and connected to the frame 100; the microphone 300 is connected to the circuit board 210; the circuit board 210 is provided with a through hole 211, one end of the through hole 211 communicates with the other end of the second transmission channel 130, and the other end of the through hole 211 is connected to the microphone 300.

In the embodiment of the present invention, the electronic device further includes a circuit board 210, the circuit board 210 is disposed in the accommodating cavity 200 and connected to the frame 100, a through hole 211 is disposed on the circuit board 210, and the circuit board is connected to the microphone 300 in the accommodating cavity 200 through the through hole 211 and communicated with the second transmission channel 130. So that the sound signal entering from the sound emission hole 110 reaches the microphone 300 through the through hole 211 along the second transmission path 130, and the sound signal is converted into an electrical signal, thereby ensuring the transmission effect of the sound signal.

In summary, the electronic device according to the embodiment of the present invention may include at least the following advantages:

in the embodiment of the application, the sound receiving hole is arranged on the frame deviation, and the first transmission channel and the second transmission channel are also arranged in the frame; one end of the second transmission channel is communicated with the side wall of the sound receiving hole, and the other end of the second transmission channel is connected with the microphone so as to transmit the sound signal in the sound receiving hole to the microphone. The first transmission channel is communicated with the hole bottom of the sound receiving hole, an on-off control structure is further arranged between the hole bottom of the sound receiving hole and the first transmission channel and used for controlling the sound receiving hole and the first transmission channel to be connected or disconnected according to air flow speed. Therefore, when the electronic equipment is in a strong airflow environment, if the airflow speed in the sound receiving hole is too high, the on-off control structure can control the conduction of the sound receiving hole and the first transmission channel, so that the airflow is discharged along the first transmission channel, and sound receiving distortion and damage of the microphone caused by strong airflow are avoided.

The features of the terms first and second in the description and in the claims of the present application may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specified. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiment of the present application provides an electronic device, where the electronic device may include at least one of a mobile phone, an earphone, a tablet computer, and a wearable device, and the specific type of the electronic device may not be limited in the embodiment of the present application.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.