Acoustic switch and electronic equipment

Abstract

The invention provides an acoustic switch. The acoustic switch comprises a main body and an execution part, the main body is provided with a first opening and a second opening, and a sound guide channel communicating the first opening and the second opening is arranged in the main body. The execution part is arranged in the sound guide channel. The execution member is configured to deform or shift in the sound guide channel when voltage is applied to the execution member and the main body so as to change the conduction area between the first opening and the second opening. Or the execution part is configured to deform or shift in the sound conducting channel when being applied with voltage so as to change the conduction area. According to the acoustic switch, voltage is applied to the main body and the execution piece or the execution piece, then coulomb force driving the execution piece to move is generated, a driving structure such as a motor for driving the execution piece to move does not need to be additionally arranged, the overall occupied space of the acoustic switch is small, and the acoustic switch can be applied to electronic equipment to achieve miniaturization.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of sound conduction technology, and in particular to an acoustic switch and an electronic device. Background Art

[0002] Acoustic switches can physically open and close the sound path to adjust the volume of the sound, or block noise to achieve a better listening experience. Acoustic switches are used in electronic devices, and electronic devices are becoming thinner and lighter, with limited internal space, and there is an urgent need for miniaturization of acoustic switches. Summary of the invention

[0003] In view of this, the present application provides a miniaturized acoustic switch and electronic device.

[0004] In a first aspect, the present application provides an acoustic switch, which includes a main body and an actuator. The main body is provided with a first opening and a second opening, and a sound-conducting channel connecting the first opening and the second opening is provided in the main body. The actuator is arranged in the sound-conducting channel. The actuator is configured to deform or shift in the sound-conducting channel when a voltage is applied to the actuator and the main body to change the conduction area between the first opening and the second opening. Or the actuator is configured to deform or shift in the sound-conducting channel when a voltage is applied to change the conduction area.

[0005] The acoustic switch generates a Coulomb force that drives the actuator to move by applying voltage to the main body and the actuator, or to the actuator. There is no need to add a driving structure such as a motor to drive the actuator to move. The acoustic switch occupies a small space as a whole, which is conducive to the miniaturization of acoustic switches in electronic devices.

[0006] In a possible embodiment, the actuator is provided with a first part and a second part, the first part is connected to the main body, and the second part is conductive. The inner wall of the sound-conducting channel includes a first wall and a second wall located on opposite sides of the actuator, the first wall is provided with a first conductive part, and the second wall is provided with a second conductive part. Along the direction from the first wall to the second wall, the first opening is located between the first conductive part and the actuator. When the second conductive part and the second part respectively carry charges of different polarities from the first conductive part, the second part is attracted by the first conductive part and repelled by the second conductive part and moves toward the first conductive part to block at least part of the first opening.

[0007] In the above embodiment, the first conductive part and the second conductive part, as well as the second part of the actuator, conduct electricity. The first conductive part and the second conductive part located on opposite sides of the second part apply Coulomb force to the actuator, so that the actuator moves toward the first opening in the sound guiding channel. The opening and closing of the acoustic switch and the adjustment of the sound are achieved by the different amounts of blocking of the first opening by the second part of the actuator.

[0008] In a possible implementation manner, the first portion is fixedly connected to the main body, and the second portion is attracted by the first conductive portion and repelled by the second conductive portion to bend and deform toward the first conductive portion.

[0009] In the above embodiment, the second portion can be bent and deformed, so that the second portion can move toward the first opening under the action of Coulomb force, thereby realizing the opening and closing of the acoustic switch and the adjustment of the sound.

[0010] In a possible implementation manner, voltages are applied to the actuator, the first conductive portion, and the second conductive portion respectively and they carry charges of the same electrode, so as to reduce the shielding area of ​​the second portion on the first opening.

[0011] In the above embodiment, by changing the polarity of the charge of the first conductive part, the first conductive part and the second conductive part respectively exert repulsive forces on the actuator, and the actuator moves in a direction away from the first opening, gradually reducing the blocking area of ​​the first opening by the second part, and the acoustic switch can be restored to the open state. The acoustic switch omits the reset part and the structure is simplified.

[0012] In a possible implementation manner, the first part is rotatably connected to the main body to drive the second part to rotate.

[0013] In the above embodiment, the first part is rotatably connected to the main body, and the second part drives the first part to rotate under the action of Coulomb force, so that the second part moves toward the first opening, thereby realizing the opening and closing of the acoustic switch and the adjustment of the sound.

[0014] In a possible implementation, the inner wall of the sound guide channel is provided with a support portion protruding toward the first portion, and the first portion is rotatably connected to the support portion. The acoustic switch also includes a reset member, which is arranged on the support portion, acts on the first portion, and is configured to drive the first portion to reset.

[0015] In the above embodiment, the reset element can drive the actuator to reset after the electric charges on the actuator and the main body are released, thereby achieving that the acoustic switch remains in the open state.

[0016] In a possible implementation, the actuator is a symmetrical structure about the rotation axis of the first part, and the masses of the actuator on both sides of the rotation axis of the first part in the direction from the second part to the first part are equal.

[0017] In the above embodiment, the masses of the actuator on both sides of the rotating shaft of the first part in the direction from the second part to the first part are equal, so that when no voltage is applied to the actuator and the main body, the actuator remains horizontal and the actuator does not block the first opening, thereby keeping the acoustic switch in an open state.

[0018] In a possible implementation, the actuator is further provided with a third portion, and the third portion is conductive. The second portion and the third portion are symmetrically arranged on both sides of the first portion. The first wall is further provided with a third conductive portion, and the second wall is further provided with a fourth conductive portion. The third conductive portion and the fourth conductive portion are placed on opposite sides of the third portion. When the third conductive portion and the third portion respectively carry charges of different polarities from the fourth conductive portion, the third portion is attracted by the fourth conductive portion and repelled by the third conductive portion and moves toward the fourth conductive portion.

[0019] In the above embodiment, when voltage is applied to the actuator and the main body, the third portion, the third conductive portion and the fourth conductive portion increase the Coulomb force applied to the actuator, increase the movement speed of the actuator, and thus improve the responsiveness of the acoustic switch.

[0020] In a possible embodiment, the inner wall of the sound-conducting channel includes a first wall and a second wall relative to each other, and a third wall and a fourth wall relative to each other, wherein the third wall is connected between the first wall and the second wall, and the fourth wall is connected between the first wall and the second wall. The first opening is arranged on the first wall, and the second opening is arranged on the second wall. The first opening and the second opening are staggered along the first direction. The opposite sides of the actuator are respectively connected to the third wall and the fourth wall. The actuator is located in the area between the first opening and the second opening of the sound-conducting channel along the first direction in a natural state, and the actuator is deformed to the area corresponding to the first opening or the second opening of the sound-conducting channel along the first direction when a voltage is applied to the actuator and the main body, so as to increase the conduction area. Or the actuator is located in the area corresponding to the first opening or the second opening of the sound-conducting channel along the first direction in a natural state, and the actuator is deformed when a voltage is applied to the actuator and the main body, so that part of the actuator moves to the area between the first opening and the second opening of the sound-conducting channel along the first direction, so as to reduce the conduction area.

[0021] In the above embodiment, the actuator is connected to the third wall and the fourth wall in the sound guiding channel, and the actuator and the main body carry charges of different polarities when voltages are applied respectively, so that the actuator is deformed and partially moved to different positions in the sound guiding channel, so that the relative position of the actuator facing the side of the first wall and the first opening, as well as the relative position of the actuator facing the side of the second wall and the second opening are changed, thereby changing the conduction state between the first opening and the second opening, and realizing the opening and closing of the acoustic switch.

[0022] In a possible embodiment, the inner wall of the sound guide channel includes a first wall and a second wall relative to each other, and a third wall and a fourth wall relative to each other, the third wall is connected between the first wall and the second wall, and the fourth wall is connected between the first wall and the second wall. The number of actuators, first openings and second openings is respectively multiple. Multiple first openings are arranged on the first wall along the first direction, and multiple second openings are arranged on the second wall along the first direction. Each adjacent first opening and second opening is staggered along the first direction. The opposite sides of the actuator are respectively connected to the third wall and the fourth wall. Two actuators are arranged in the area corresponding to at least one of the adjacent first openings and second openings along the first direction of the sound guide channel, and the two actuators are deformed when voltage is applied to move in opposite directions to the area outside the first opening and second opening of the sound guide channel along the first direction to reduce the conduction area. Or each actuator is located in the area between the adjacent first opening and second opening of the sound guide channel along the first direction, and when voltage is applied to multiple actuators, the actuators are deformed and partially moved to the area corresponding to the first opening or the second opening of the sound guide channel along the first direction to increase the conduction area.

[0023] In the above embodiment, multiple actuators are arranged in the sound guiding channel. As long as voltage is applied to the multiple actuators, the opening and closing of the acoustic switch can be realized through the deformation and displacement of the actuators. The structure is simple and the actuators occupy a small space, which is conducive to the miniaturization of the acoustic switch.

[0024] In a possible implementation, two actuators are disposed in the sound guiding channel and are located on both sides of the plurality of first openings and the plurality of second openings.

[0025] In the above embodiment, two actuators are arranged in the sound guide channel on both sides of the plurality of first openings and the plurality of second openings, so that the two actuators on both sides of the openings (the first openings and the second openings) are applied with voltage as a group to carry charges of different polarities.

[0026] In a second aspect, the present application provides an acoustic switch, which includes a main body and an actuator. The main body is provided with a first opening. The actuator is connected to the main body and is surrounded to form a sound-conducting channel, and is provided with a second opening, and the first opening and the second opening are staggered. When voltage is applied to the actuator and the main body, they carry charges of different polarities, so that the actuator and / or the main body are attracted and deformed by the Coulomb force generated by the charge, so that the actuator and the main body between the first opening and the second opening are in contact with or smaller than a set value, so as to change the conduction area between the first opening and the second opening.

[0027] In the above embodiment, the actuator and the main body are surrounded to form a sound-conducting channel, and voltage is applied to the actuator and the main body to realize deformation of the actuator and / or the main body. The structure is simple, and the actuator and the main body occupy a small space, which is conducive to the miniaturization of the acoustic switch.

[0028] In a possible implementation, the actuator includes a base and a connecting arm connected to the periphery of the base. The second opening is provided in the base. At least one of the connecting arm and the base is elastically deformable.

[0029] In the above embodiment, the connecting arm or the base can be elastically deformed so that when the actuator is subjected to Coulomb force, the base can move toward the main body, thereby achieving a spacing between the actuator and the main body between each adjacent first opening and second opening that is less than a set value or fits together, thereby reducing the conduction area between the first opening and the second opening.

[0030] In a third aspect, the present application provides an electronic device, comprising a device body and an acoustic switch, wherein the acoustic switch is any one of the above-mentioned acoustic switches, the acoustic switch is arranged on one side of the device body, and is used to adjust the volume of the sound entering the device body or emitted from the device body.

[0031] In the above electronic device, the acoustic switch generates a Coulomb force to drive the actuator to move by applying voltage to the main body and the actuator, or to the actuator. There is no need to add a driving structure such as a motor to drive the actuator to move. The acoustic switch occupies a small space as a whole, which is conducive to the miniaturization of the electronic device.

[0032] In a possible implementation, the device body is an earpiece speaker, a loudspeaker or a microphone.

[0033] In the above implementation, the acoustic switch is applied to the electronic device, and can realize the switching between the external speaker mode and the privacy mode of the earpiece speaker, the noise reduction mode of the earphone including the speaker, and the disabled mode of the microphone. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of an acoustic switch provided in an embodiment of the present application applied to an electronic device.

[0035] Figure 2 A schematic diagram of an acoustic switch provided in another embodiment of the present application being applied to another electronic device.

[0036] Figure 3 A schematic diagram of an acoustic switch provided in yet another embodiment of the present application being applied to yet another electronic device.

[0037] Figure 4 A schematic diagram of an acoustic switch in an open state provided for the first embodiment of the present application.

[0038] Figure 5 for Figure 4 Diagram showing the acoustic switch in the closed position.

[0039] Figure 6A schematic diagram of an acoustic switch in an open state provided for the second embodiment of the present application.

[0040] Figure 7 for Figure 6 Diagram showing the acoustic switch in the closed position.

[0041] Figure 8 for Figure 7 A schematic diagram of an acoustic switch in another embodiment when in a closed state is shown.

[0042] Fig. 9 for Figure 6 The acoustic switch shown is a schematic diagram of an open state in another embodiment.

[0043] Fig.10 A schematic diagram of an acoustic switch in an open state provided for the third embodiment of the present application.

[0044] Fig.11 for Fig.10 A cross-sectional view of the acoustic switch along line AA is shown.

[0045] Fig.12 for Fig.10 Diagram showing the acoustic switch in the closed position.

[0046] Fig.13 for Fig.12 A cross-sectional view of the acoustic switch along line BB is shown.

[0047] Fig.14 for Fig.10 The acoustic switch shown is a schematic diagram of another embodiment when the position of the actuator is changed and is in the open state.

[0048] Fig.15 for Fig.14 Diagram showing the acoustic switch in the closed position.

[0049] Fig.16 for Fig.10 The acoustic switch shown is a schematic diagram of another embodiment when the position of the actuator is changed and is in the closed state.

[0050] Fig.17 and Fig.18 They are Fig.16 Schematic diagram of the acoustic switch shown in different open states.

[0051] Fig.19 A schematic diagram of an acoustic switch in an open state provided for the fourth embodiment of the present application.

[0052] Fig. 20 for Fig.19Diagram showing the acoustic switch in the closed position.

[0053] Figure 21 to Figure 23 They are Fig.19 Schematic diagrams of acoustic switches in other different embodiments are shown.

[0054] Fig.24 A schematic diagram of an acoustic switch in an open state provided for the fifth embodiment of the present application.

[0055] Fig.25 and Fig.26 They are Fig.24 Schematic diagram of the acoustic switch shown in different closed states.

[0056] Fig. 27 A schematic diagram of an acoustic switch in a closed state provided for the sixth embodiment of the present application.

[0057] Fig.28 and Fig.29 They are Fig. 27 Schematic diagram of the acoustic switch shown in different closed states.

[0058] Main component symbols

[0059] Electronic devices 200a, 200b, 200c

[0060] Equipment body 201a, 201b, 201c

[0061] Acoustic switch 100, 100d, 100e, 100g, 100h, 100i, 100k, 100l, 100m, 100n, 100p, 100q, 100r, 100s, 100t

[0062] First opening 101, 101g, 101k, 101p

[0063] Second openings 102, 102g, 102k, 102p

[0064] Sound guide channel 103, 103g, 103k, 103p

[0065] Main body 10, 10g, 10k, 10p, 10r

[0066] Base 1001

[0067] Cover 1003

[0068] First wall 11, 11g, 11k

[0069] Second wall 12, 12g, 12k

[0070] Third wall 13g

[0071] Fourth Wall 14g

[0072] Supporting part 15

[0073] Supporting part 1111

[0074] Deformation part 1113

[0075] The first conductive portion 1101

[0076] The second conductive portion 1102

[0077] The third conductive portion 1103

[0078] Fourth conductive portion 1104

[0079] Fifth conductive portion 1105

[0080] Sixth conductive portion 1106

[0081] Executing parts 20, 20d, 20f, 20g, 20k, 20p

[0082] Part 121

[0083] Part 2, 23, 23f

[0084] Part 3, 25, 25f

[0085] Matrix 27, 27q

[0086] Connecting arm 29, 29q

[0087] Reset 30

[0088] First direction X

[0089] The second direction Z

[0090] The third direction Y

[0091] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0092] In order to further illustrate the technical means and effects adopted by the present application to achieve the intended application purpose, the following is combined with the drawings and implementation methods. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0093] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0094] Some embodiments of the present application propose an acoustic switch including a main body and an actuator. The main body is provided with a first opening and a second opening, and a sound-conducting channel connecting the first opening and the second opening is provided in the main body. The actuator is arranged in the sound-conducting channel. The actuator is configured to deform or shift in the sound-conducting channel when a voltage is applied to the actuator and the main body, so as to change the conduction area between the first opening and the second opening. Or the actuator is configured to deform or shift in the sound-conducting channel when a voltage is applied, so as to change the conduction area. Or in an acoustic switch, the main body is provided with a first opening, the actuator is connected to the main body and surrounded to form a sound-conducting channel, and a second opening is provided, the first opening and the second opening are staggered, and the actuator and the main body carry charges of different polarities when a voltage is applied, so that the actuator is attracted by the Coulomb force generated by the charge and deformed, so that the actuator and the part of the main body located between the first opening and the second opening fit together or are smaller than a set value, so as to change the conduction area between the first opening and the second opening.

[0095] The above-mentioned acoustic switch generates a Coulomb force to drive the actuator to move by applying voltage to the main body and the actuator, or to the actuator. There is no need to add a driving structure such as a motor to drive the actuator to move. The acoustic switch occupies a small space as a whole, which is conducive to the miniaturization of the acoustic switch in electronic equipment.

[0096] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0097] Please also see Figures 1 to 3, one embodiment of the present application proposes an acoustic switch 100. The acoustic switch 100 adopts MEMS (Micro-Electro-Mechanical System) technology to form a sound adjustment structure for an electronic device. The present application also proposes an electronic device. The electronic device includes an acoustic switch 100 and a device body 201. In one embodiment, the electronic device is a terminal device including a sound conduction function. For example, the terminal device can be a mobile phone, a tablet computer, a wearable device, a vehicle-mounted device, an augmented reality (AR) / virtual reality (VR) device, a laptop computer, an ultra-mobile personal computer (UMPC), a netbook, a personal digital assistant (PDA) and other devices.

[0098] In one embodiment, if Figure 1 As shown, the electronic device 200a has a dual-channel function. The device body 201a is an earpiece speaker. The electronic device 200a is provided with a micro-slit and an opening (not shown). The sound waves generated by the device body 201a can be conducted from the micro-slit and the opening to the external environment. The earpiece speaker can conduct the sound waves generated by the device body 201a to the human ear through the micro-slit. In order to avoid the problem of privacy leakage caused by the sound waves leaking to the external environment through the opening in the call mode, the acoustic switch 100 is configured to close the channel connecting the device body 201a and the opening (not shown), blocking the channel for sound waves to leak to the outside, so as to realize the privacy mode of the earpiece speaker; and when the sound needs to be played out, the acoustic switch 100 is configured to open the channel, thereby realizing the external speaker mode of the earpiece speaker.

[0099] In another embodiment, if Figure 2 As shown, the electronic device 200b is an earphone structure. The electronic device 200b is provided with a leakage hole (not shown). The device body 201b is a speaker. General in-ear headphones have two modes: transparent and noise reduction. The sound of the external environment enters the human ear through the leakage hole, causing the human ear to hear the sound of the external environment and the sound of the speaker at the same time. The acoustic switch 100 is configured to close the channel between the leakage hole and the human ear (not shown) to reduce or prevent the sound waves of the external environment from being transmitted to the human ear, thereby achieving a quiet noise reduction mode. When the electronic device 200b needs to switch to the transparent mode, the acoustic switch 100 can be switched to the on state.

[0100] In another embodiment, Figure 3As shown, the device body 201c is a microphone. The electronic device 200c is provided with another opening (not shown), which is connected to the microphone. The acoustic switch 100 is arranged in the channel connected between the opening and the device body 201c, and the acoustic switch 100 is configured to be able to close the channel to achieve physical blocking of the sound path, so that the device body 201c is placed to monitor the sound of the external environment, and realize the microphone disabled mode of the electronic device 200c.

[0101] First embodiment

[0102] See also Figure 4 and Figure 5 , the acoustic switch 100 includes a main body 10 and an actuator 20. A sound guide channel 103 is provided in the main body 10. And the main body 10 is provided with a first opening 101 and a second opening 102. The first opening 101 and the second opening 102 respectively connect the sound guide channel 103 and the external environment. In one embodiment, the main body 10 includes a base 1001 and a cover 1003. The base 1001 and the cover 1003 are arranged to form the sound guide channel 103, and the first opening 101 and the second opening 102 are formed between the cover 1003 and the base 1001, but it is not limited thereto. For example, in other embodiments, the main body 10 can also be formed by connecting three or more structures.

[0103] The actuator 20 is disposed in the sound guiding channel 103. In a natural state, the actuator 20 avoids the sound guiding channel 103g between the first opening 101 and the second opening 102, so that sound waves can pass through the first opening 101, the sound guiding channel 103g and the second opening 102, so that the acoustic switch 100 is in an open state. In one embodiment, the actuator 20 is parallel to the direction of the first opening 101 toward the second opening 102 in a natural state, but is not limited thereto. For example, in other embodiments, the actuator 20 can also be arranged in a linear track and tilted in the direction of the first opening 101 toward the second opening 102 in a natural state, as long as the actuator 20 does not block the sound guiding channel 103g.

[0104] In one embodiment, the first opening 101 and the second opening 102 are respectively located on opposite sides of the sound guiding channel 103 and are arranged in a direction parallel to the bottom wall of the sound guiding channel 103, but the invention is not limited thereto. It is understood that in other embodiments, the first opening 101 and the second opening 102 may also be arranged in a direction inclined relative to the bottom wall of the sound guiding channel 103.

[0105] In one embodiment, one end of the actuator 20 close to the second opening 102 is rotatably disposed on the main body 10 , but the present invention is not limited thereto.

[0106] The actuator 20 is configured to deviate in the sound guide channel 103 when a voltage is applied to the actuator 20 and the main body 10, so as to change the conduction area between the first opening 101 and the second opening 102. Voltages are applied to the main body 10 and the actuator 20 respectively, so that the main body 10 and the actuator 20 are charged respectively. According to the principle that charges of opposite polarities attract each other and charges of the same polarity repel each other, the actuator 20 is subjected to the Coulomb force and moves to change its position in the sound guide channel 103.

[0107] For example, Figure 5 As shown, the actuator 20 carries a negative charge, the main body 10 carries a positive charge on the side of the actuator 20 close to the first opening 101, and the main body 10 carries a negative charge on the side of the actuator 20 away from the first opening 101. The actuator 20 is attracted by the charged part of the main body 10 close to the first opening 101 and repelled by the charged part of the main body 10 away from the first opening 101, so that the actuator 20 is deflected and approaches the first opening 101, thereby gradually reducing the conduction area between the first opening 101 and the sound guide channel 103.

[0108] In one embodiment, when the acoustic switch 100 is in the off state, that is, when the acoustic switch 100 blocks the passage of sound, the distance between the actuator 20 and the portion with positive polarity charge on the main body 10 is less than the set value, and this distance makes the impedance of the actuator 20 and the main body 10 to the sound wave very large, making it difficult for the sound to pass through. The actuator 20 is spaced from the main body 10 to avoid charge neutralization during contact, resulting in a change in the Coulomb force and a change in the position of the actuator 20. It can be understood that in other embodiments, the second part 23 can also be attached to the portion with positive polarity charge on the main body 10 when the acoustic switch is in the off state, and an insulating film (not shown) is attached to the outside of the second part 23 to avoid charge neutralization between the second part 23 and the main body 10.

[0109] The acoustic switch 100 applies voltage to the main body 10 and the actuator 20 to generate a Coulomb force that drives the actuator 20 to move. There is no need to add a driving structure such as a motor to drive the actuator 20 to move. The acoustic switch 100 occupies a small space as a whole, which is conducive to the miniaturization of the acoustic switch 100 when applied to the electronic device 200.

[0110] The actuator 20 is provided with a first part 21 and a second part 23. The first part 21 is rotatably connected to the main body 10. The second part 23 is located on one side of the first part 21. The actuator 20 is a conductive structure. The inner wall of the sound guide channel 103 includes a first wall 11 and a second wall 12. The first wall 11 and the second wall 12 are respectively located on opposite sides of the actuator 20. The first wall 11 is provided with a first conductive part 1101 corresponding to the second part 23. The second wall 12 is provided with a second conductive part 1102 corresponding to the second part 23. The first conductive part 1101 is closer to the first opening 101 than the second conductive part 1102. Voltages are applied to the main body 10 and the actuator 20 respectively, so that the actuator 20 has a negative charge, the first conductive part 1101 has a positive charge, and the second conductive part 1102 has a negative charge. The second part 23 of the actuator 20 rotates toward the first conductive part 1101.

[0111] It can be understood that in other embodiments, only the second portion 23 of the actuator 20 may be conductive, and other parts of the actuator 20 except the second portion 23 are non-conductive.

[0112] In one embodiment, the substrate 1001 is a silicon-based structure, and the first conductive part 1101 and the second conductive part 1102 are conductive layers disposed on the main body 10, but the present invention is not limited thereto. As long as the main body 10 can generate electric charge when a voltage is applied, the material of the main body 10 is not limited herein.

[0113] In one embodiment, the sound waves enter the sound guiding channel 103 from the first opening 101 and are transmitted from the second opening 102, but the present invention is not limited thereto. For example, in another embodiment, the sound waves may also enter the sound guiding channel 103 from the second opening 102 and be transmitted from the first opening 101, and the actuator 20 may block the first opening 101 to prevent the sound from passing through the acoustic switch 100.

[0114] It is understandable that in other embodiments, when the acoustic switch 100 allows sound to pass, the voltage is released, and after the charge is consumed, the Coulomb force disappears, and the actuator 20 returns to its original position. In one embodiment, the acoustic switch 100 also includes a reset member 30. The inner wall of the sound-conducting channel 103 is provided with a support portion 15 protruding toward the first portion 21. The first portion 21 is rotatably disposed on the support portion 15. The reset member 30 is disposed on the support portion 15, and acts on the actuator 20 to rotate the actuator 20 to its original position. The reset member 30 can be a structure such as a return spring. The reset member 30 can drive the actuator 20 to reset after the charge on the actuator 20 and the main body 10 is released, thereby achieving that the acoustic switch 100 remains in the open state.

[0115] The support portion 15 allows a distance between the actuator 20 and the bottom wall of the sound guiding channel 103 , so that the sound guiding channel 103 provides a movement space for the actuator 20 .

[0116] The magnitude of the control voltage can adjust the charge amount of the main body 10 and the actuator 20, and then adjust the blocking area of ​​the actuator 20 blocking the first opening 101 to change the acoustic impedance. For example, when the actuator 20 rotates to different positions corresponding to the acoustic switch 100 being in the open state and the closed state, the conduction area between the first opening 101 and the second opening 102 is different, thereby changing the size of the sound passing through the acoustic switch 100, and achieving the effect of adjusting the sound.

[0117] It is understood that in other embodiments, the reset member 30 may also be omitted. For example, by applying a voltage to the main body 10, the charge on the first conductive part 1101 is gradually replaced with a negative charge, and the first conductive part 1101 and the second conductive part 1102 respectively exert a repulsive force on the actuator 20, and when the two repulsive forces are the same, the actuator 20 is roughly parallel to the first conductive part 1101 and the second conductive part 1102, thereby restoring the acoustic switch 100 to the open state. The acoustic switch 100 omits the reset member 30, and the structure is simplified.

[0118] It can be understood that in other embodiments, when voltage is applied to the main body 10 and the actuator 20, the actuator 20 may also carry a positive charge, the first conductive part 1101 may carry a negative charge, and the second conductive part 1102 may carry a positive charge.

[0119] The first conductive part 1101 and the second conductive part 1102, as well as the second part 23 of the actuator 20 are conductive. The first conductive part 1101 and the second conductive part 1102 located on opposite sides of the second part 23 apply Coulomb force to the actuator 20, so that the actuator 20 is deflected in the sound guiding channel 103. The opening and closing of the acoustic switch 100 and the adjustment of the sound are adjusted by the different blocking amounts of the first opening 101 blocked by the second part 23 of the actuator 20.

[0120] Second embodiment

[0121] See also Figure 6 and Figure 7 The acoustic switch 100d of the second embodiment has a substantially similar structure to the acoustic switch 100 of the first embodiment, except that the actuator 20d is a symmetrical structure about the rotation axis of the first portion 21. The actuator 20d is further provided with a third portion 25, and the reset member 30 is omitted.

[0122] The actuator 20d is symmetrical about the rotation axis of the first part 21, so that the masses of the actuator 20d on both sides of the rotation axis of the first part 21 along the direction from the second part 23 to the first part 21 are equal. When no voltage is applied to the actuator 20d and the main body 10, the actuator 20d remains horizontal, thereby keeping the acoustic switch 100d in an open state.

[0123] The second portion 23 and the third portion 25 are symmetrically arranged on both sides of the first portion 21. The first wall 11 is further provided with a third conductive portion 1103, and the second wall 12 is further provided with a fourth conductive portion 1104. The third conductive portion 1103 and the fourth conductive portion 1104 are respectively arranged on opposite sides of the third portion 25. The third conductive portion 1103 and the fourth conductive portion 1104 are respectively arranged on opposite sides of the third portion 25.

[0124] When voltage is applied to the main body 10 and the actuator 20d, the third conductive part 1103 carries a negative charge and the fourth conductive part 1104 carries a positive charge. The third part 25 is attracted by the fourth conductive part 1104 and repelled by the third conductive part 1103 and moves toward the fourth conductive part 1104. When voltage is applied to the actuator 20d and the main body 10, the third part 25, the third conductive part 1103 and the fourth conductive part 1104 increase the Coulomb force applied to the actuator 20d, increase the movement speed of the actuator 20d, and thus improve the responsiveness of the acoustic switch 100d.

[0125] It can be understood that in other embodiments, the third portion 25 of the actuator 20d is conductive, and the third portion 25 and the second portion 23 may also carry charges of opposite polarities. As long as the third conductive portion 1103 and the third portion 25 carry charges of the same polarity, and the third portion 25 and the fourth conductive portion 1104 carry charges of opposite polarities, the third portion 25 and the second portion 23 of the actuator 20d can move in opposite directions: the second portion 23 moves toward the first opening 101, and the third portion 25 moves in a direction away from the first opening 101.

[0126] See also Figure 8 In another embodiment, the actuator 20, the first conductive part 1101, the second conductive part 1102, the third conductive part 1103 and the fourth conductive part 1104 respectively carry charges of the same polarity to keep the actuator 20d balanced in a state of unobstructed first opening 101, thereby achieving the acoustic switch 100e remaining in an open state.

[0127] See also Fig. 9 In another embodiment, the actuator 20f is elastically deformable. The first portion 21 is fixedly connected to the support portion 15 of the main body 10. The second portion 23f is attracted by the first conductive portion 1101 and repelled by the second conductive portion 1102 to bend and deform toward the first conductive portion 1101. The third portion 25f is repelled by the third conductive portion 1103 and attracted by the fourth conductive portion 1104 to bend and deform toward the fourth conductive portion 1104. The second portion 23f is bendable and deformable, so that the second portion 23f can move toward the first opening 101 under the action of the Coulomb force, thereby realizing the opening and closing of the acoustic switch 100f and the adjustment of the sound.

[0128] Third embodiment

[0129] See also Fig.10 and Fig.11 The acoustic switch 100g includes a main body 10g and an actuator 20g. The main body 10g is provided with a first opening 101g and a second opening 102g, and a sound guide channel 103g connecting the first opening 101g and the second opening 102g is provided in the main body 10g. The actuator 20g is disposed in the sound guide channel 103g. The actuator 20g is configured to deform when a voltage is applied to the actuator 20g and the main body 10g to change the conduction area between the first opening 101g and the second opening 102g.

[0130] In one embodiment, the first opening 101g and the second opening 102g are located on opposite sides of the sound guide channel 103g and are staggered along the first direction X. The inner wall of the sound guide channel 103g includes a first wall 11g and a second wall 12g located on opposite sides of the actuator 20g, and a third wall 13g and a fourth wall 14g located on the other two sides of the actuator 20g. The third wall 13g is connected between the first wall 11g and the second wall 12g, and the fourth wall 14g is connected between the first wall 11g and the second wall 12g. The first opening 101g is provided on the first wall 11g, and the second opening 102g is provided on the second wall 12g.

[0131] For the sake of clarity in the subsequent description, the second direction Z is defined as the direction from the first wall 11g to the second wall 12g, the first direction X is perpendicular to the second direction Z and the third direction Y, and the third direction Y is the direction from the third wall 13g to the fourth wall 14g. It can be understood that in other embodiments, the first direction X and the second direction Z / third direction Y can also be two directions that are relatively inclined and have an acute angle.

[0132] The projection of the first opening 101g on the second wall 12g of the sound guiding channel 103g is located outside the second opening 102g, so that the first opening 101g and the second opening 102g are staggered along the first direction X.

[0133] Please continue reading Fig.11 , the opposite sides of the actuator 20g are connected to the third wall 13g and the fourth wall 14g, the third wall 13g and the fourth wall 14g are both located on the opposite sides of the first opening 101g and the second opening 102g, and the actuator 20g is in contact with the first wall 11g and the second wall 12g in a natural state, but is not limited thereto. The actuator 20g is located in the area of ​​the sound guide channel 103g corresponding to the second opening 102g in a natural state, and the second opening 102g destroys the contact between the peripheral side of the actuator 20g and the second wall 12g of the sound guide channel 103g, resulting in the sound guide channel 103g and the second opening 102g being in a conductive state, so that the conductive area between the first opening 101g and the second opening 102g is greater than zero, and the acoustic switch 100g is in an open state.

[0134] When voltage is applied to the actuator 20g and the body 10g, the actuator 20g is deformed to the position of the sound guide channel 103g corresponding to the first opening 101g or the second opening 102g along the first direction X, so as to increase the conduction area. A fifth conductive portion 1105 is provided on the inner wall of the sound guide channel 103g on the side of the first opening 101g away from the first opening 101g. Fig.12 and Fig.13 The fifth conductive part 1105 and the actuator 20g are respectively charged with different polarities by voltage. The actuator 20g is attracted by the Coulomb force generated by the charge and deforms. A portion of the actuator 20g moves toward the first opening 101g to the area in the sound guide channel 103g corresponding to the first opening 101g and the second opening 102g, as shown in FIG. Fig.11 As shown. All the peripheral walls of the actuator 20g are in contact with the first wall 11g, the second wall 12g, the third wall 13g and the fourth wall 14g, so that the actuator 20g separates the sound-conducting channel 103g into two cavities, and the first opening 101g and the second opening 102g are connected to two different cavities respectively, so that the conduction area of ​​the first opening 101g and the second opening 102g is zero, thereby making the acoustic switch 100g in the closed state. When the electric charge of the actuator 20g and the fifth conductive part 1105 is released, the actuator 20g returns to its original shape, and the acoustic switch 100g is switched to the open state.

[0135] It can be understood that in other embodiments, the peripheral wall of the actuator 20g may also have a gap smaller than the set value with the first wall 11g and the second wall 12g to increase the acoustic impedance and make it difficult for sound waves to pass through the gap or the energy of the sound waves is very small after passing through the gap to achieve the effect of closing the acoustic switch 100g.

[0136] In one embodiment, the actuator 20g is a diaphragm structure, so that the actuator 20g can be elastically deformed under force. For example, the actuator 20g is a diaphragm structure made of polysilicon material.

[0137] It is understood that in other embodiments, the position of the actuator 20g can be changed. For example, in another embodiment, Fig.14As shown, the actuator 20g is located in the area of ​​the sound-conducting channel 103g corresponding to the first opening 101g in the natural state. The first opening 101g destroys the contact between the peripheral wall of the actuator 20g and the first wall 11g of the sound-conducting channel 103g, so that the first opening 101g and the sound-conducting channel 103g are in a conductive state. The inner wall of the sound-conducting channel 103g is provided with a sixth conductive portion 1106. The sixth conductive portion 1106 is located along the first direction X on the side of the second opening 102g away from the first opening 101g. Voltages are applied to the sixth conductive portion 1106 and the actuator 20g respectively and carry charges of different polarities. The actuator 20g is attracted by the Coulomb force generated by the charges and deformed. Part of the actuator 20g moves toward the second opening 102g to the area in the sound-conducting channel 103g corresponding to the first opening 101g and the second opening 102g, as shown in FIG. Fig.15 All the peripheral walls of the actuator 20g are in contact with the first wall 11g, the second wall 12g, the third wall 13g and the fourth wall 14g, so that the actuator 20g separates the sound guide channel 103g into two cavities, and the first opening 101g and the second opening 102g are connected to two different cavities respectively, so that the conduction area of ​​the first opening 101g and the second opening 102g is zero, thereby making the acoustic switch 100h in a closed state.

[0138] It is understood that in other embodiments, the actuator 20g can also turn the acoustic switch 100g to the closed state in the natural state. For example, in another embodiment, Fig.16 As shown, the actuator 20g is naturally located in the area between the first opening 101g and the second opening 102g of the sound guide channel 103g, and all the peripheral walls of the actuator 20g are respectively in contact with the first wall 11g, the second wall 12g, the third wall 13g and the fourth wall 14g, thereby making the acoustic switch 100i closed. Fig.17 As shown, when the actuator 20g and the sixth conductive part 1106 are applied with voltage and carry charges of different polarities respectively, part of the actuator 20g moves toward the second opening 102g under the action of the Coulomb force, so that the second opening 102g destroys the fit between the actuator 20g and the second wall 12g, and then the second opening 102g is connected to the sound guide channel 103g located on the side of the actuator 20g facing the first opening 101g along the first direction X, so that the conductive area between the first opening 101g and the second opening 102g is greater than zero, and the acoustic switch 100i is switched to the open state. Or, as Fig.18As shown, when voltage is applied to the actuator 20g and the fifth conductive portion 1105 and they carry charges of different polarities respectively, part of the actuator 20g moves toward the first opening 101g under the action of the Coulomb force, so that the first opening 101g destroys the fit between the actuator 20g and the first wall 11g, thereby making the first opening 101g conductive with the sound-conducting channel 103g located along the first direction X on the side of the actuator 20g toward the second opening 102g, so that the conductive area between the first opening 101g and the second opening 102g is greater than zero, and the acoustic switch 100j is switched to the open state.

[0139] The actuator 20g is connected to the third wall 13g and the fourth wall 14g in the sound guiding channel 103g, and the actuator 20g and the main body 10g carry charges of different polarities when voltages are applied respectively, so that the actuator 20g is deformed and partially moved to different positions in the sound guiding channel 103g, so that the relative position of the side of the actuator 20g facing the first wall 11g and the first opening 101g, and the relative position of the side of the actuator 20g facing the second wall 12g and the second opening 102g are changed, thereby changing the conduction state between the first opening 101g and the second opening 102g, thereby realizing the opening and closing of the acoustic switch 100g.

[0140] Fourth embodiment

[0141] See also Fig.19 and Fig. 20 The structure of the acoustic switch 100k of the fourth embodiment is substantially the same as that of the acoustic switch 100k of the third embodiment, except that: in the acoustic switch 100k of the fourth embodiment, the number of the first opening 101k, the number of the second opening 102k and the actuator 20k are respectively multiple.

[0142] The plurality of first openings 101 k are arranged along the first direction X on the same side of the sound guiding channel 103 k , and the plurality of second openings 102 k are arranged along the first direction X on a side of the sound guiding channel 103 k away from the plurality of first openings 101 k .

[0143] In one embodiment, the number of the first openings 101k is three, the number of the second openings 102k is two, and the number of the actuators 20k is four, but not limited thereto. The three first openings 101k are spaced apart on the first wall 11k, and the two second openings 102k are disposed on the second wall 12k.

[0144] Each two actuators 20k are located in the area corresponding to each second opening 102k in the sound guide channel along the first direction X. The second openings 102k respectively destroy the fit between the peripheral walls of the two actuators 20k and the second wall 12k, so that the second openings 102k located on the side of the actuator 20k facing the first opening 101k and the sound guide channel 103k are in a conductive state, and the conductive area between the first opening 101k and the second opening 102k is greater than zero, and the acoustic switch 100k is in an open state. Fig.19 shown.

[0145] Voltage is applied to the four actuators 20k, so that the two actuators 20k corresponding to each second opening 102k carry charges of the same polarity, so that the two actuators 20k are deformed and partially move in opposite directions to the two sides of the second opening 102k, that is, move to the area between the first opening 101k and the second opening 102k along the first direction X of the sound guide channel 103k, so that the peripheral wall of each actuator 20k fits with the first wall 11k, the second wall 12k, the third wall 13g and the fourth wall 14g, and then the actuator 20k connects the adjacent first opening 101k and the second opening 102k in the two separated cavities, thereby blocking the conduction between the first opening 101k and the second opening 102k, so that the acoustic switch 100k is in a closed state, as shown in FIG. Fig. 20 shown.

[0146] It can be understood that in other embodiments, the number and position of the actuator 20k may also be changed. For example, in another embodiment, Fig.21 As shown, the number of the actuators 20k of the acoustic switch 1001 is six, and every two actuators 20k are located in the area of ​​the sound guiding channel 103k corresponding to the first opening 101k.

[0147] For example, in another embodiment, Fig. 22 As shown, the number of actuators 20k is four. Each actuator 20k is located in the area between the adjacent first opening 101k and the second opening 102k along the first direction X of the sound guide channel 103k, so that the acoustic switch 100m is in a closed state. When voltage is applied to the four actuators 20k, the actuators 20k are deformed and partially moved to the area corresponding to the first opening 101k or the second opening 102k of the sound guide channel 103k along the first direction X to increase the conduction area. For example, when every two adjacent actuators 20k carry charges of different polarities, the two actuators 20k are deformed and partially moved to the area corresponding to the second opening 102k of the sound guide channel 103k, so that the conduction area of ​​the adjacent first opening 101k and the second opening 102k is greater than zero, so that the acoustic switch 100mk is in an open state.

[0148] Multiple actuators 20k are arranged in the sound guiding channel 103k. As long as voltage is applied to the multiple actuators 20k, the acoustic switch 100k can be opened and closed through the deformation and displacement of the actuators 20k. The structure is simple and the actuators 20k occupy a small space, which is conducive to the miniaturization of the acoustic switch 100k.

[0149] See also Fig.23 In another embodiment, Fig.23 The acoustic switch 100n shown is relative to Fig. 22 The difference of the acoustic switch 100m shown is that an actuator 20k is added on both sides of the plurality of first openings 101k and the plurality of second openings 102k. The two actuators 20k are connected to the inner wall of the sound guide channel 103k, so that the two actuators 20k on both sides of the openings (the first openings 101k and the second openings 102k) are a group of voltages applied to carry charges of different polarities.

[0150] It can be understood that in other embodiments, Fig.23 The acoustic switch 100n shown can also omit two of the multiple actuators 20k located at the two ends, and by conducting electricity through the inner walls of the sound-conducting channels 103k located at the multiple first openings 101k and the multiple second openings 102k along the first direction X, a Coulomb force is formed between the main body 10k and the charges carried by the adjacent actuators 20k due to the applied voltage.

[0151] Fifth embodiment

[0152] See also Fig.24 The acoustic switch 100p includes a main body 10p and an actuator 20p. The main body 10p is provided with a first opening 101p. The actuator 20p is connected to the main body 10p and surrounds and forms a sound guide channel 103p. The actuator 20p is provided with a second opening 102p.

[0153] In one embodiment, the number of the first openings 101p is two, and the number of the second openings 102p is three, but not limited thereto. Each adjacent first opening 101p and second opening 102p are staggered, for example, the orthographic projection of the first opening 101p on the main body 10p is located outside the second opening 102p.

[0154] When the actuator 20p is in a natural state, the first opening 101p and the second opening 102p are connected to both sides of the sound guide channel 103p, and the acoustic switch 100p is in an open state.

[0155] The actuator 20p and the main body 10p respectively include conductive structures, so that when voltage is applied to the actuator 20p and the main body 10p, the actuator 20p and the main body 10p carry charges of different polarities, and the actuator 20p is attracted by the Coulomb force generated by the charges and deforms. Part of the actuator 20p moves toward the main body 10p, so that the distance between the actuator 20p and the main body 10p between each adjacent first opening 101p and second opening 102p is less than a set value, so as to increase the acoustic impedance and realize the conduction area between the first opening 101p and the second opening 102p, such as Fig.25 shown.

[0156] The actuator 20p and the main body 10p are arranged to form a sound guide channel 103p, and voltage is applied to the actuator 20p and the main body 10p to realize deformation of the actuator 20p. The structure is simple, and the actuator 20p and the main body 10p occupy a small space, which is conducive to the miniaturization of the acoustic switch 100p.

[0157] In one embodiment, the actuator 20p includes a substrate 27 and a connecting arm 29. The connecting arm 29 is connected to the peripheral side of the substrate 27. The connecting arm 29 is connected between the substrate 27 and the main body 10p. The connecting arm 29 can be elastically deformed. When a voltage is applied to the actuator 20p and the main body 10p, the substrate 27 is conductive so that the substrate 27 and the main body 10p carry charges of different polarities, respectively, and the substrate 27 moves toward the main body 10p under the Coulomb force, and the connecting arm 29 is elastically deformed to adapt to the gradual decrease in the distance between the substrate 27 and the main body 10p.

[0158] It is understood that in other embodiments, the actuator 20p may also be elastically deformed by the base 27, and the connecting arm 29q is not deformed under force, such as Fig.26 The acoustic switch 100q shown in the figure realizes that the actuator 20p moves toward the base 27q, so that the distance between the actuator 20p and the main body 10p between each adjacent first opening 101p and second opening 102p is less than a set value or fits together, so as to reduce the conduction area between the first opening 101p and the second opening 102p.

[0159] Sixth embodiment

[0160] See also Fig. 27 The structure of the acoustic switch 100r of the sixth embodiment is substantially the same as that of the acoustic switch 100p of the fifth embodiment, except that: in the acoustic switch 100r of the sixth embodiment, the structure of the main body 10r is different and the actuator 20p has no elastic deformation function.

[0161] The main body 10r includes a support portion 1111 and a deformable portion 1113, and the deformable portion 1113 is elastically deformable and conductive. The connecting arm 29 is connected to the support portion 1111. When a voltage is applied to the actuator 20p and the main body 10r, the actuator 20p and the main body 10r carry charges of different polarities, so that the deformable portion 1113 is attracted by the Coulomb force generated by the charge and deforms, while the actuator 20p does not deform.

[0162] It is understood that in other embodiments, both the main body and the actuator may be deformed, for example, Fig.28 As shown, when voltage is applied to the actuator 20p and the main body 10r in the acoustic switch 100s, the connecting arm 29 and the deformation portion 1113 of the actuator 20p are deformed. Fig.29 As shown, when a voltage is applied to the actuator 20q and the main body 10r in the acoustic switch 100t, the base 27q and the deformation portion 1113 of the actuator 20q are deformed.

[0163] The above-mentioned acoustic switch 100 generates a Coulomb force that drives the actuator 20 to move by applying voltage to the main body 10 and the actuator 20, or to the actuator 20. There is no need to add a driving structure such as a motor to drive the actuator 20 to move. The acoustic switch 100 occupies a small space as a whole, which is conducive to the miniaturization of the acoustic switch 100 when applied to the electronic device 200.

[0164] The acoustic switch 100 charges the main body 10 and the actuator 20 by electrostatic means. Compared with the existing piezoelectric acoustic switch, the acoustic switch 100 uses electrostatic coupling with higher efficiency, which can achieve a larger displacement of the actuator 20, and thus can achieve a larger difference in switch states (open, closed, and a state in between open and closed); compared with the traditional electromagnetic acoustic switch, the acoustic switch 100 can be miniaturized.

[0165] In addition, those skilled in the art should recognize that the above embodiments are only used to illustrate the present application and are not intended to be limiting of the present application. As long as they are within the spirit and scope of the present application, appropriate changes and modifications to the above embodiments are within the scope of the present application.

Claims

1. An acoustic switch, characterized in that: include: A main body, wherein the main body is provided with a first opening and a second opening, and a sound guide channel communicating with the first opening and the second opening is provided in the main body; and An actuator is arranged in the sound guiding channel; The actuator is configured to deform or deflect in the sound guide channel when a voltage is applied to the actuator and the body, so as to change a conduction area between the first opening and the second opening; or The actuator is configured to deform or shift within the sound guide channel when a voltage is applied to it, so as to change the conduction area.

2. The acoustic switch according to claim 1, characterized in that: The actuator comprises a first part and a second part, the first part is connected to the main body, and the second part is conductive; The inner wall of the sound guide channel comprises a first wall and a second wall located on opposite sides of the actuator, the first wall is provided with a first conductive portion, and the second wall is provided with a second conductive portion; along the direction from the first wall to the second wall, the first opening is located between the first conductive portion and the actuator; When the second conductive portion and the second part respectively carry charges of different polarities from the first conductive portion, the second part is attracted by the first conductive portion and repelled by the second conductive portion and moves toward the first conductive portion to cover at least a portion of the first opening.

3. The acoustic switch according to claim 2, characterized in that: The first part is fixedly connected to the main body, and the second part is attracted by the first conductive part and repelled by the second conductive part so as to bend and deform toward the first conductive part.

4. The acoustic switch according to claim 2, characterized in that: Voltages are applied to the actuator, the first conductive part, and the second conductive part respectively, and they carry charges of the same electrode, so as to reduce the shielding area of ​​the first opening by the second part.

5. The acoustic switch according to claim 2, characterized in that: The first part is rotatably connected to the main body to drive the second part to rotate.

6. The acoustic switch according to claim 5, characterized in that: The inner wall of the sound guide channel is provided with a support portion protruding toward the first portion, and the first portion is rotatably connected to the support portion; The acoustic switch further includes a reset member, which is disposed on the supporting portion, acts on the first portion, and is configured to drive the first portion to reset.

7. The acoustic switch according to claim 5, characterized in that: The actuator is a symmetrical structure about the rotation axis of the first part, and the masses of the actuator on both sides of the rotation axis of the first part along the direction from the second part to the first part are equal.

8. The acoustic switch according to claim 7, characterized in that: The actuator is further provided with a third portion, and the third portion is conductive; the second portion and the third portion are symmetrically arranged on both sides of the first portion; the first wall is further provided with a third conductive portion, and the second wall is further provided with a fourth conductive portion; The third conductive part and the fourth conductive part are placed on opposite sides of the third part; when the third conductive part and the third part respectively carry charges of different polarities from the fourth conductive part, the third part is attracted by the fourth conductive part and repelled by the third conductive part and moves toward the fourth conductive part.

9. The acoustic switch according to claim 1, characterized in that: The inner wall of the sound guide channel includes a first wall and a second wall opposite to each other, and a third wall and a fourth wall opposite to each other, wherein the third wall is connected between the first wall and the second wall, and the fourth wall is connected between the first wall and the second wall; The first opening is arranged on the first wall, and the second opening is arranged on the second wall; the first opening and the second opening are staggered along the first direction; the opposite sides of the actuator are respectively connected to the third wall and the fourth wall; The actuator is located in a region between the first opening and the second opening of the sound guide channel along the first direction in a natural state, and when voltage is applied to the actuator and the main body, the actuator is deformed to the position of the sound guide channel corresponding to the first opening or the second opening along the first direction to increase the conduction area; or The actuator is located in a region of the sound guide channel corresponding to the first opening or the second opening along the first direction in a natural state; The actuator is deformed when voltage is applied to the actuator and the main body, so that part of the actuator moves to the area of ​​the sound guide channel corresponding to the first opening and the second opening along the first direction to reduce the conduction area.

10. The acoustic switch according to claim 1, characterized in that: The inner wall of the sound guide channel includes a first wall and a second wall opposite to each other, and a third wall and a fourth wall opposite to each other, the third wall is connected between the first wall and the second wall, and the fourth wall is connected between the first wall and the second wall; the number of the actuator, the first opening and the second opening are respectively multiple; the multiple first openings are arranged on the first wall along the first direction, and the multiple second openings are arranged on the second wall along the first direction; each adjacent first opening and second opening are staggered along the first direction; the opposite sides of the actuator are respectively connected to the third wall and the fourth wall; Two actuators are arranged in an area of ​​the sound guide channel corresponding to at least one of the adjacent first opening and the second opening along the first direction, and the two actuators are deformed when voltage is applied to move in opposite directions to an area of ​​the sound guide channel corresponding to the first opening and the second opening outside the first opening along the first direction, so as to reduce the conduction area; or Each of the actuators is located in an area between the adjacent first opening and the second opening of the sound guiding channel along the first direction. When voltage is applied to multiple actuators, the actuators are deformed and partially moved to an area of ​​the sound guiding channel along the first direction corresponding to the first opening or the second opening to increase the conduction area.

11. The acoustic switch according to claim 10, characterized in that: Two actuators are arranged in the sound guiding channel and are located on both sides of the plurality of first openings and the plurality of second openings.

12. An acoustic switch, characterized in that: include: A main body having a first opening; and An actuator is connected to the main body and is arranged to form a sound guide channel, and is provided with a second opening, wherein the first opening and the second opening are arranged in a staggered manner; When voltage is applied to the actuator and the main body, they carry charges of different polarities, so that the actuator and / or the main body are attracted and deformed by the Coulomb force generated by the charges, so that the actuator and the part of the main body located between the first opening and the second opening are in contact with or smaller than a set value, thereby changing the conduction area between the first opening and the second opening.

13. The acoustic switch according to claim 12, wherein: The actuator comprises a base and a connecting arm connected to the periphery of the base; the second opening is provided on the base; At least one of the connecting arm and the base is elastically deformable.

14. An electronic device, comprising a device body and an acoustic switch, characterized in that: The acoustic switch is the acoustic switch according to any one of claims 1 to 13, and the acoustic switch is arranged on one side of the device body and is used to adjust the volume of the sound entering the device body or emitted from the device body.

15. The electronic device according to claim 14, characterized in that: The device body is a receiver speaker, a loudspeaker or a microphone.

Images