CN217388990U

CN217388990U - Electroacoustic device and electronic apparatus

Info

Publication number: CN217388990U
Application number: CN202220564173.6U
Authority: CN
Inventors: 黄瑶; 司梦轩
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2022-03-15
Filing date: 2022-03-15
Publication date: 2022-09-06
Anticipated expiration: 2032-03-15

Abstract

The present disclosure provides an electroacoustic device and an electronic apparatus, the electroacoustic device including a housing, a flexible film, a speaker, and a transmission mechanism. A through hollow cavity is arranged in the shell, and a first opening and a second opening which are communicated with the hollow cavity are respectively arranged at two ends of the hollow cavity. The flexible membrane is arranged at the first opening. The loudspeaker is arranged in the second opening and is arranged in the hollow cavity. The loudspeaker, the shell and the flexible membrane are enclosed to form a sealed cavity. The loudspeaker drives the flexible membrane to move along the direction of the central axis of the hollow cavity when vibrating. One end of the transmission mechanism is connected with the flexible membrane, and the other end of the transmission mechanism is connected with the shell or the rigid structure and used for limiting the flexible membrane to move along the direction of the central shaft of the hollow cavity. The problem of screen vibration or shell vibration caused by the vibration of the flexible membrane under the large-amplitude work can be reduced or eliminated.

Description

Electroacoustic device and electronic apparatus

Technical Field

The present disclosure relates to micro speaker technology, and more particularly, to an electroacoustic device and an electronic apparatus.

Background

The micro-speaker is mainly applied to micro-electronic devices, and the internal space and thickness of the micro-electronic devices are limited, which results in a very limited back cavity volume of the micro-speaker. In order to increase the volume of the back cavity while controlling the cost, the shell wall of the back cavity of the micro-speaker is provided with a flexible membrane, and when the vibrating membrane of the micro-speaker vibrates, the air flow generated by the vibration passes through an air leakage hole in the micro-speaker to push the flexible membrane to vibrate. The flexible membrane can also vibrate along with the flexible membrane, and the volume of the rear cavity is indirectly increased so as to improve the low-frequency acoustic performance. However, the vibration of the flexible membrane of the speaker under the large amplitude operation may cause the housing or the screen of the miniature electronic device to vibrate, which makes the user experience poor.

SUMMERY OF THE UTILITY MODEL

The present disclosure provides an electroacoustic device and an electronic apparatus, which can reduce or eliminate the problem of vibration of a housing or a screen caused by vibration of a flexible membrane under large-amplitude operation of a speaker.

In a first aspect, an embodiment of the present disclosure provides an electroacoustic device, including:

the device comprises a shell, a first sealing ring and a second sealing ring, wherein a through hollow cavity is arranged in the shell, and a first opening and a second opening which are communicated with the hollow cavity are respectively arranged at two ends of the hollow cavity;

the flexible membrane is arranged at the first opening;

the loudspeaker is arranged in the second opening and is arranged in the hollow cavity, and a sealed cavity is formed by enclosing the loudspeaker, the shell and the flexible membrane; the loudspeaker drives the flexible membrane to move along the direction of the central shaft of the hollow cavity when vibrating;

and one end of the transmission mechanism is connected with the flexible membrane, and the other end of the transmission mechanism is connected with the shell or the rigid structure and is used for limiting the flexible membrane to move along the direction of the central shaft of the hollow cavity.

Further, the transmission mechanism comprises a first movable part and a second movable part connected to the first movable part, the first movable part is connected to one side, away from the loudspeaker, of the flexible membrane, and the second movable part is connected to one side, close to the first opening, of the shell; when the flexible film moves, the first movable part is driven to move along the direction of the central shaft of the hollow cavity, and the first movable part drives the second movable part to move along the direction of the central shaft of the hollow cavity in the opposite moving direction.

Furthermore, the transmission mechanism further comprises a fixed part and a transmission part movably arranged on the fixed part, and the fixed part is connected to the shell or the rigid structure; the first movable part and the second movable part are arranged at two opposite ends of the transmission part, and the connection position of the transmission part and the fixing part is located between the first movable part and the second movable part.

Furthermore, the transmission part comprises a connecting end which is rotatably connected to the fixing part, and a rotating shaft of the transmission part is vertical to a central shaft of the hollow cavity; the distance between the connecting end and the first movable part is greater than the distance between the connecting end and the second movable part.

Further, the transmission member comprises a main body part, a first bending part and a second bending part, and the first bending part and the second bending part are connected to two opposite ends of the main body part; the first movable part is arranged at the tail end of the first bent part, and the second movable part is arranged at the tail end of the second bent part; the length of the first bending part along the direction of the central axis of the hollow cavity is greater than the length of the second bending part along the direction of the central axis of the hollow cavity.

Furthermore, on a projection plane perpendicular to the direction of the central axis of the hollow cavity, the area of the first movable part is larger than that of the first bent part; and/or

On a projection plane perpendicular to the direction of the central axis of the hollow cavity, the area of the second movable part is larger than that of the second bending part.

Further, the piezoelectric mechanism is arranged between the transmission mechanism and the shell or between the transmission mechanism and the rigid structure.

Furthermore, a bulge is formed in a protruding manner in a direction away from the second opening on a side of the shell close to the first opening, and the piezoelectric structure is connected with the bulge; one end of the transmission mechanism is connected to the flexible membrane, and the other end of the transmission mechanism is connected to the piezoelectric structure.

Further, the electroacoustic device further comprises an energy storage structure, and the energy storage structure is electrically connected with the piezoelectric structure.

Furthermore, the shell comprises a shell body and a protective cover, the shell body is provided with the hollow cavity, and the loudspeaker, the shell body and the flexible membrane are enclosed to form the sealed cavity; the protective cover is connected to one side of the shell body close to the flexible membrane; one end of the transmission mechanism is connected to the flexible membrane, and the other end of the transmission mechanism is connected to the shell body or the protective cover.

In a second aspect, an embodiment of the present disclosure provides an electronic device, which includes a device housing, a screen disposed on one side of the device housing, and an electroacoustic device as in the embodiment of the first aspect, where the electroacoustic device is disposed in the device housing, and one end of the transmission mechanism is connected to the flexible film, and the other end of the transmission mechanism is connected to the housing, the device housing, or the screen.

The utility model provides an electroacoustic device, including casing, flexible membrane, speaker and drive mechanism, wherein, drive mechanism's one end connect in the flexible membrane, the other end connect in casing or rigid structure, drive mechanism can restrict the flexible membrane is followed the direction motion of the center pin of well cavity to can hinder the flexible membrane towards screen or equipment shell direction vibration, with the screen vibration or the equipment shell vibration's that weaken or eliminate the big amplitude work of speaker down the flexible membrane vibration and produce problem.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

FIG. 1 is a partial perspective view of an electronic device with a transmission mechanism removed according to an exemplary embodiment of the present disclosure;

FIG. 2 is a simplified schematic plan view of an electronic device with a drive mechanism removed in accordance with an exemplary embodiment of the present disclosure;

fig. 3 is a schematic view of an electro-acoustic apparatus according to an exemplary embodiment of the present disclosure.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in the description and claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "a number" means two or more. Unless otherwise indicated, "front", "rear", "lower" and/or "upper" and the like are for convenience of description and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

The terminology used in the disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

The present disclosure provides an electroacoustic device and an electronic apparatus. The electroacoustic device and the electronic apparatus according to the present disclosure will be described in detail below with reference to the accompanying drawings. The features of the following examples and embodiments may be combined with each other without conflict.

Referring to fig. 1 to 3, an embodiment of the present disclosure provides an electronic device 10, where the electronic device 10 may be a mobile phone, a watch, a tablet computer, or other device capable of playing music. The electronic device 10 includes a device housing 11, a screen 12, and an electro-acoustic apparatus 13. The screen 12 is disposed on one side of the device housing 11, faces a user, and plays a role in displaying. The electroacoustic device 13 is disposed in the equipment housing 11, so as to prevent the surface of the electroacoustic device 13 from falling ash and affecting the sound production performance, and the electroacoustic device 13 and the equipment housing 11 can jointly enclose a cavity 135 for correcting high-frequency noise, and the cavity 135 serves as a front cavity of the electroacoustic device 13. In some alternative embodiments, the device housing 11 is provided with a sound emitting hole 111, and the sound emitting hole 111 may communicate the inside of the device housing 11 with the outside of the device housing 11, so that the sound generated by the electroacoustic device 13 may be transmitted to the air to be received by the human ear. In some embodiments, the screen 12 is disposed on the side of the device housing 11, and the sound emitting holes 111 are disposed on the side of the device housing 11 connected to the side, so that the screen 12 can occupy a larger area and can be applied to a full-screen device. Wherein the plane of the sound emitting holes 111 may be disposed perpendicular to the plane of the screen 12 or disposed obliquely with respect to the plane of the screen 12.

Among them, the electro-acoustic device 13 includes a housing 131, a flexible membrane 132, a speaker 133, and a transmission mechanism 134. The housing 131 of the electroacoustic device 13 may be made of a rigid material, a hollow cavity 1311 is disposed inside the housing 131, two ends of the hollow cavity 1311 respectively have a first opening 1312 and a second opening 1313 communicated with the hollow cavity 1311, and the first opening 1312 and the second opening 1313 are disposed on two opposite sides of the housing 131 along the X direction shown in the figure. Wherein the second opening 1313 may communicate the hollow cavity 1311 with the sound emitting hole 111. The speaker 133 is used to convert electrical energy into acoustic energy.

The flexible membrane 132 is disposed in the first opening 1312, wherein the first opening 1312 may cover the first opening 1312, the speaker 133 is disposed in the second opening 1313 and is installed in the hollow cavity 1311, so that the speaker 133, the housing 131 and the flexible membrane 132 enclose a sealed cavity 1314, and the sealed cavity 1314 is used as a rear cavity of the electroacoustic device 13, so as to make low-frequency sound more powerful. Wherein the speaker 133 may completely isolate the front and rear chambers. The speaker 133 vibrates to bring the flexible membrane 132 along the direction of the central axis of the hollow chamber 1311 (shown as the X direction). The volume of the seal cavity 1314, namely the back cavity, is indirectly increased, so that the acoustic performance of low frequency can be improved, and the sound emission effect is improved.

The actuator 134 is connected at one end to the flexible membrane 132 and at the other end to the housing 131 or rigid structure 15. The rigid structure 15 may be the device housing 11 or the screen 12, and the housing 131 and the rigid structure 15 may be rigid material support structures, which function to support the transmission mechanism 134. For example, the actuator 134 has one end connected to the flexible film 132 and the other end connected to the housing 131, the device case 11, or the screen 12, and the housing 131, the device case 11, or the screen 12 may function to support the actuator 134. The transmission mechanism 134 is used to limit the flexible membrane 132 from moving along the central axis of the hollow cavity 1311, so as to prevent the flexible membrane 132 from vibrating towards the screen 12 or the device housing 11, thereby reducing or eliminating the problem of the screen 12 or the device housing 11 vibrating due to the flexible membrane 132 vibrating under the large amplitude operation of the speaker 133.

The utility model provides an electroacoustic device, including casing, flexible membrane, speaker and drive mechanism, wherein, drive mechanism's one end connect in flexible membrane, the other end connect in casing or rigid structure, drive mechanism can restrict flexible membrane is followed the direction motion of the center pin of well cavity to can hinder flexible membrane to vibrate towards screen or equipment shell direction, with the screen vibration or the equipment shell vibration problem that the flexible membrane vibration produced under weakening or eliminating speaker large amplitude work.

In some alternative embodiments, the housing 131 includes a housing body 1318 and a protective cover 138, the housing body 1318 is provided with a hollow cavity 1311, and the speaker 133, the housing body 1318 and the flexible membrane 132 enclose a sealed cavity 1314. The shield 138 is attached to the housing 1318 on a side thereof adjacent to the flexible membrane 132 and is fixedly coupled to the housing 131 to protect the flexible membrane 132 from damage due to impact. The actuator 134 is connected to the flexible membrane 132 at one end and to the housing body 1318 or the shield 138 at the other end. In some alternative embodiments, the protective hood 138 is provided with a plurality of vent holes 1381, and the vent holes 1381 are uniformly arranged, so that the sound waves can be transmitted through the vent holes 1381, and the energy generated by the flexible membrane 132 is prevented from being collected between the protective hood 138 and the flexible membrane 132 to press the flexible membrane 132.

In some alternative embodiments, the speaker 133 includes a speaker unit 1331 and a diaphragm 1332 disposed at a front end of the speaker unit 1331, wherein the speaker unit 1331 includes a magnetic pole and a voice coil, and the voice coil is connected to the diaphragm 1332, and when a current is applied to the voice coil, the voice coil can reciprocate in a magnetic field generated by the magnetic pole and drive the diaphragm 1332 to reciprocate to form an acoustic sound. Alternatively, the diaphragm 1332 may surround the device housing 11 to form a cavity 135, and the cavity 135 is used as a front cavity of the electroacoustic device 13 and is communicated with the sound emitting hole 111 to increase the intermediate frequency and correct the high-frequency noise.

In some alternative embodiments, the actuator 134 includes a first movable portion 1341 and a second movable portion 1342 connected to the first movable portion 1341, the first movable portion 1341 being connected to a side of the flexible membrane 132 remote from the speaker 133. The second movable portion 1342 is connected to the housing 131 at a side close to the first opening 1312. The connection mode in the disclosure can be a detachable connection mode, such as an abutting mode, a vacuum chuck connection mode and the like; the connection may be fixed, such as by bonding. The speaker 133 drives the flexible film 132 to move along the direction of the central axis of the hollow cavity 1311 when vibrating, the flexible film 132 can drive the first movable portion 1341 to move along the direction of the central axis of the hollow cavity 1311 when moving, and the first movable portion 1341 drives the second movable portion 1342 to move along the direction of the central axis of the hollow cavity 1311 in the opposite direction. With this arrangement, when the flexible film 132 moves towards a direction close to the device housing 11 or the screen 12, the first movable portion 1341 can be driven to move towards a direction close to the device housing 11 or the screen 12, the second movable portion 1342 moves in a direction opposite to the moving direction of the first movable portion 1341, and the second movable portion 1342 moves towards a direction close to the housing 131. Because the second movable portion 1342 is connected to the housing 131, the housing 131 can block the movement of the second movable portion 1342, so as to play a certain damping role, and thus the first movable portion 1341 can block the flexible membrane 132 from moving towards a direction close to the device housing 11 or the screen 12, so as to reduce or eliminate the problem that the screen 12 vibrates or the device housing 11 vibrates due to the fact that the internal space and the thickness of the electronic device 10 are limited, and the distance between the flexible membrane 132 and the device housing 11 or the screen 12 is relatively close, and energy generated by the vibration of the flexible membrane 132 when the speaker 133 operates at a large amplitude is transferred to the screen 12 or the device housing 11, thereby improving the use experience of a user.

In some alternative embodiments, the first movable portion 1341 of the transmission mechanism 134 is connected to the middle portion of the flexible film 132, the vibration amplitude of the middle portion of the flexible film 132 is more obvious than that of the edge, the connection to the middle portion of the flexible film 132 can better prevent the device housing 11 or the screen 12 from vibrating, and the movement of the first movable portion 1341 can be more obvious. In some alternative embodiments, the end surface of the first movable portion 1341 near one side of the flexible membrane 132 is disposed in parallel with the flexible membrane 132, so that the force applied to the first movable portion 1341 by the flexible membrane 132 when vibrating is more uniform.

In some alternative embodiments, the transmission mechanism 134 includes a fixing member 1343 and a transmission member 1344 movably disposed on the fixing member 1343, wherein the fixing member 1343 is connected to the housing 131 or the rigid structure 15, and the housing 131 and the rigid structure 15 function to support the fixing member 1343 and thus the transmission member 1344. In some alternative embodiments, the shield 138 is attached to the housing body 1318 on a side thereof adjacent to the flexible membrane 132, the second movable portion 1342 is attached to the housing body 1318, and the securing member 1343 is attached to the shield 138 or the device housing 11 or the screen 12. The fixing member 1343 and the transmission member 1344 may be links with square or circular cross-sections. The transmission member 1344 is movably disposed on the fixing member 1343, and the transmission member 1344 can rotate relative to the fixing member 1343. The first movable portion 1341 and the second movable portion 1342 are disposed at two opposite ends of the transmission member 1344, so that the first movable portion 1341 drives the second movable portion 1342 to move. The connection position between the fixing member 1343 and the transmission member 1344 is located between the first movable portion 1341 and the second movable portion 1342, the connection position between the fixing member 1343 and the transmission member 1344 may be a rotation axis of the transmission member 1344, and the connection position is located between the first movable portion 1341 and the second movable portion 1342, so that the first movable portion 1341 and the second movable portion 1342 move in opposite directions. In the embodiment of the present disclosure, the transmission mechanism 134 is a lever structure, but of course, the transmission mechanism 134 may also be another structure, and it is sufficient that the moving direction of the second movable portion 1342 is opposite to the moving direction of the first movable portion 1341, which is not limited in the present disclosure.

In some alternative embodiments, the transmission member 1344 includes a connection end 1345, the connection end 1345 is rotatably connected to the fixing member 1343, and the rotation axis of the transmission member 1344 is perpendicular to the direction of the central axis of the hollow cavity 1311. Therefore, when the flexible film 132 moves to drive the first movable portion 1341 to move along the direction of the central axis of the hollow cavity 1311, the transmission member 1344 rotates relative to the fixing member 1343, so that the first movable portion 1341 can drive the second movable portion 1342 to move along the circumferential direction of the hollow cavity 1311, and the second movable portion 1342 can vertically act on the housing 131, so that the acting force is more concentrated, and the acting effect is better. The distance between the connection end 1345 and the first movable portion 1341 is greater than the distance between the connection end 1345 and the second movable portion 1342. When the transmission member 1344 has a lever structure, a portion of the transmission member 1344 between the connection end 1345 and the first movable portion 1341 may be regarded as a long arm, and a portion of the transmission member 1344 between the connection end 1345 and the second movable portion 1342 may be regarded as a short arm. Because the transmission member 1344 can rotate relative to the fixing member 1343, the connecting end 1345 serves as a position where the rotating shaft is disposed, the arm length between the connecting end 1345 and the first movable portion 1341 is greater than the arm length between the connecting end 1345 and the second movable portion 1342, a larger force can be generated on one side of the second movable portion 1342 by applying a smaller force on one side of the first movable portion 1341, and the distance between the connecting end 1345 and the second movable portion 1342 is further, the required thrust force is smaller, so that even if the force generated by the vibration of the flexible film 132 is smaller, the second movable portion 1342 can be driven to move.

In some optional embodiments, the transmission member 1344 further includes a main body portion 1346, a first bending portion 1347, and a second bending portion 1348, and the first bending portion 1347 and the second bending portion 1348 are connected to two opposite ends of the main body portion 1346. The first movable portion 1341 is disposed on the first bending portion 1347, and the second movable portion 1342 is disposed on the second bending portion 1348, so that the driving member 1344 is simpler in structural design, and the first movable portion 1341 can drive the second movable portion 1342 to move more easily. The length of the first bent portion 1347 along the central axis of the hollow cavity 1311 is greater than the length of the second bent portion 1348 along the central axis of the hollow cavity 1311. Because the length of the second bending portion 1348 is shorter, the weight of the second bending portion 1348 is lighter, so that the first movable portion 1341 can more easily drive the second bending portion 1348 and the second movable portion 1342 disposed at the second bending portion 1348 to move.

Further, on a projection plane perpendicular to the direction of the central axis of the hollow cavity 1311, that is, seen along the X direction, the area of the first movable portion 1341 is larger than the area of the first bent portion 1347, so that the contact area between the first movable portion 1341 and the flexible film 132 can be increased, and the force application area is increased, so that the flexible film 132 drives the first movable portion 1341 to move more easily. Further, on a projection plane perpendicular to the direction of the central axis of the hollow cavity 1311, the area of the second movable portion 1342 is larger than the area of the second bent portion 1348, so that the contact area between the second movable portion 1342 and the housing 131 can be increased, and when the second movable portion 1342 is not accurately aligned with the housing 131, the second movable portion 1342 is staggered from the housing 131 when moving toward the housing 131, and is separated from the housing 131, so that the electroacoustic device 13 fails. In some embodiments, the shapes of the first and second

movable portions

1341 and 1342 may be a long strip, a circle, a square, and the like on a projection plane perpendicular to the direction of the central axis of the hollow cavity 1311, i.e., viewed along the X direction, and the disclosure is not limited thereto.

In some alternative embodiments, the electro-acoustic device 13 further comprises a piezoelectric structure 136, wherein the piezoelectric structure 136 may be a piezoelectric ceramic, a piezoelectric crystal, a piezoelectric semiconductor, or the like. The piezoelectric structure 136 has a piezoelectric effect, that is, when the piezoelectric structure 136 is deformed due to external force, polarization phenomenon is generated in the piezoelectric structure 136, and charges with opposite polarities are generated on two opposite surfaces of the piezoelectric structure 136. The piezoelectric structure 136 is disposed between the transmission mechanism 134 and the housing 131 or between the transmission mechanism 134 and the rigid structure 15. In the present embodiment, the piezoelectric structure 136 is disposed between the second movable portion 1342 of the transmission mechanism 134 and the shell body 1318 of the housing 131. When the flexible film 132 moves toward a direction close to the device housing 11 or the screen 12, the first movable portion 1341 may drive the second movable portion 1342 to move toward a direction close to the piezoelectric structure 136, the second movable portion 1342 contacts or presses against the piezoelectric structure 136, so that a changing stress is generated in the piezoelectric structure 136, and under a piezoelectric effect of the piezoelectric structure 136, an electric displacement and an electric potential difference are generated on two sides of the piezoelectric structure 136, at this time, the piezoelectric structure 136 may supply power to other structures in the electronic device 10. The piezoelectric structure 136 can not only block the movement of the flexible membrane 132 to reduce or eliminate the problem of the screen 12 vibration or the device housing 11 vibration caused by the flexible membrane 132 vibration of the speaker 133 under the large amplitude operation; the kinetic energy of the vibration of the flexible membrane 132 can also be converted into electrical energy for application in the electronic device 10. Therefore, the energy generated by the vibration of the flexible membrane 132 when the loudspeaker 133 works at a large amplitude is transmitted out, the problem of the vibration of the screen 12 or the vibration of the equipment shell 11 is reduced, and the use experience of a user is improved. In some embodiments, the second active portion 1342 is disposed in the middle of the piezoelectric structure 136, so that the charge distribution inside the piezoelectric structure 136 is more uniform. In some embodiments, the distance between the connection end 1345 and the first movable portion 1341 is greater than the distance between the connection end 1345 and the second movable portion 1342, which also amplifies the force acting on the piezoelectric structure 136, resulting in a larger stress on the piezoelectric structure 136 and a larger output voltage of the piezoelectric structure 136.

In some alternative embodiments, the piezoelectric structure 136 may be directly electrically connected to the structure to be powered. In other embodiments, the electroacoustic device 13 further comprises an energy storage structure 137, wherein the energy storage structure 137 may be a micro energy storage element such as an energy storage capacitor. The energy storage structure 137 is electrically connected to the piezoelectric structure 136, wherein the energy storage structure 137 is electrically connected to the piezoelectric structure 136 via a lead, and can store electrical energy from the piezoelectric structure 136. The power stored by the energy storage structure 137 may be used to assist in powering the display lighting devices of the electronic device 10, such as a charge indicator or the illumination of the device housing 11.

In some alternative embodiments, a protrusion 1315 is formed to protrude from one side of the housing 131 close to the first opening 1312 in a direction away from the second opening 1313, wherein the protrusion 1315 may be disposed on two sides of the second opening along a direction perpendicular to a central axis of the hollow cavity 1311 (the Y direction shown in fig. 3), and the flexible film 132 may be disposed between the two protrusions 1315, so that the flexible film 132 may be prevented from falling off. The piezoelectric structure 136 is connected to the boss 1315. The actuator 134 is connected to the flexible membrane 132 at one end and to the piezoelectric structure 136 at the other end. In this embodiment, the second movable portion 1342 of the transmission mechanism 134 is connected to the piezoelectric structure 136, so when the housing 131 structure is used to prevent the flexible film 132 from falling off, the second bent portion 1348 can be set shorter, so that the second bent portion 1348 is lighter in weight, the first movable portion 1341 can drive the second movable portion 1342 to move more conveniently, the distance between the main body portion 1346 and the piezoelectric structure 136 is closer, and the effect of the second movable portion 1342 on the piezoelectric structure 136 is better.

Other embodiments of the present disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An electro-acoustic apparatus, comprising:

the device comprises a shell, a first sealing ring, a second sealing ring and a sealing ring, wherein a through hollow cavity is arranged in the shell, and a first opening and a second opening which are communicated with the hollow cavity are respectively arranged at two ends of the hollow cavity;

the flexible membrane is arranged at the first opening;

2. The electro acoustic device in accordance with claim 1, wherein said transmission mechanism comprises a first movable portion and a second movable portion connected to said first movable portion, said first movable portion being connected to a side of said flexible membrane remote from said speaker, said second movable portion being connected to a side of said housing near said first opening; when the flexible membrane moves, the first movable part is driven to move along the direction of the central shaft of the hollow cavity, and the first movable part drives the second movable part to move along the direction of the central shaft of the hollow cavity in the opposite moving direction.

3. The electro acoustic apparatus in accordance with claim 2, wherein said driving mechanism further comprises a fixed member and a driving member movably disposed on said fixed member, said fixed member being connected to said housing or rigid structure; the first movable part and the second movable part are arranged at two opposite ends of the transmission part, and the connection position of the transmission part and the fixing part is located between the first movable part and the second movable part.

4. The electro acoustic apparatus in accordance with claim 3, wherein said actuator includes a connecting end rotatably connected to said stationary member, said actuator having a rotational axis perpendicular to a central axis of said hollow chamber; the distance between the connecting end and the first movable part is greater than the distance between the connecting end and the second movable part.

5. The electro acoustic device in accordance with claim 3, wherein said transmission member includes a main body portion, a first bent portion and a second bent portion, said first bent portion and said second bent portion being connected to opposite ends of said main body portion; the first movable part is arranged at the tail end of the first bent part, and the second movable part is arranged at the tail end of the second bent part; the length of the first bending part along the direction of the central axis of the hollow cavity is greater than the length of the second bending part along the direction of the central axis of the hollow cavity.

6. The electro-acoustic device according to claim 5, wherein an area of said first movable portion is larger than an area of said first bent portion on a projection plane perpendicular to a direction of a central axis of said hollow cavity; and/or

7. The electro acoustic device in accordance with any one of claims 1 to 6, further comprising a piezoelectric structure disposed between said transmission mechanism and said housing or between said transmission mechanism and a rigid structure.

8. The electro acoustic device according to claim 7, wherein a protrusion is formed to protrude from a side of said housing close to said first opening in a direction away from said second opening, and said piezoelectric structure is connected to said protrusion; one end of the transmission mechanism is connected to the flexible membrane, and the other end of the transmission mechanism is connected to the piezoelectric structure.

9. The electro acoustic device in accordance with claim 7, further comprising an energy storage structure electrically connected with said piezoelectric structure.

10. The electro acoustic device in accordance with claim 1, wherein said housing comprises a housing body and a shield, said housing body is provided with said hollow cavity, said speaker, said housing body and said flexible membrane enclose said sealed cavity; the protective cover is connected to one side of the shell body close to the flexible membrane; one end of the transmission mechanism is connected to the flexible membrane, and the other end of the transmission mechanism is connected to the shell body or the protective cover.

11. An electronic device comprising a device housing, a screen disposed on one side of said device housing, and an electro-acoustic apparatus as claimed in any one of claims 1 to 10, said electro-acoustic apparatus being disposed within said device housing, said actuator having one end connected to said flexible membrane and another end connected to said housing, said device housing, or said screen.