Power generation device and sound box

Abstract

The invention provides a power generation device and a sound box, and relates to the technical field of sound boxes, the power generation device comprises a device main body, the device main body is internally provided with a sound wave collection cavity, the device main body is provided with an opening communicated with the sound wave collection cavity, and the sound wave collection cavity is used for collecting sound waves and making the device main body resonate under the action of the sound waves; and the power generation part is arranged on the device main body, and the power generation part is used for generating electric energy when resonating along with the device main body. According to the power generation device and the sound box provided by the invention, the problem that the use experience is affected due to the poor cruising ability of a rechargeable sound box in the related technology is solved.

Description

A power generation device and a speaker Technical Field

[0001] This application relates to the field of speaker technology, and more particularly to a power generation device and a speaker. Background Technology

[0002] With the improvement of living standards, rechargeable speakers are becoming increasingly popular due to their advantages such as portability, wireless connectivity, and lightweight design.

[0003] In related technologies, a rechargeable speaker includes a cabinet and a speaker and a battery housed within the cabinet. In use, sound is played through the speaker, and the battery powers the speaker.

[0004] However, the energy density and charging efficiency of the batteries in the aforementioned rechargeable speakers can easily limit their battery life, resulting in poor battery performance and thus affecting the user experience. Summary of the Invention

[0005] This application provides a power generation device and a speaker to solve the problem of poor battery life of rechargeable speakers in related technologies, which affects the user experience.

[0006] On one hand, this application provides a power generation device, comprising:

[0007] The device body has a sound wave collecting cavity inside and an opening communicating with the sound wave collecting cavity. The sound wave collecting cavity is used to collect sound waves and cause the device body to resonate under the action of the sound waves.

[0008] A power generating component is disposed on the main body of the device and is used to generate electrical energy when it resonates with the main body of the device.

[0009] In one possible implementation, the main body of the device includes a resonator body and a substrate, wherein the resonator body is connected to the substrate and together encloses the acoustic wave collecting cavity.

[0010] The power generation device is connected to the substrate.

[0011] In one possible implementation, the resonator body is provided with an extension tube, the width of which is smaller than the width of the acoustic wave collecting cavity, the interior of which is in communication with the acoustic wave collecting cavity, and the opening is formed at the end of the extension tube away from the acoustic wave collecting cavity.

[0012] In one possible implementation, the extension tube is located inside the acoustic wave collecting cavity.

[0013] In one possible implementation, the extension tube is a curved tube.

[0014] In one possible implementation, at least one of the power generating elements is disposed on the inner surface of the substrate, and at least one of the power generating elements is disposed on the outer surface of the substrate.

[0015] In one possible implementation, a plurality of local resonant units are disposed on the substrate, the local resonant units being located on the periphery of the power generation device.

[0016] In one possible implementation, the localized resonant unit includes a resonant core and an elastic connection layer, wherein the resonant core is connected to the substrate through the elastic connection layer.

[0017] On the other hand, this application provides a speaker, including a speaker body, a power module disposed on the speaker body, and a power generation device as described in any of the above embodiments, wherein the power generation component in the power generation device is electrically connected to the power module.

[0018] In one possible implementation, a circuit module is also included, wherein the power generating device is electrically connected to the circuit module, and the circuit module is electrically connected to the power consuming module;

[0019] And / or, the power generation device is disposed inside the speaker body, the power generation device is located at the upper or lower part of the speaker body, and the opening in the power generation device faces the side of the speaker body.

[0020] This application provides a power generation device and a speaker. The power generation device includes: a main body with a sound wave collecting cavity inside and an opening communicating with the sound wave collecting cavity, which collects sound waves and causes the main body to resonate under the influence of the sound waves; and a power generation component disposed on the main body, which generates electrical energy when resonating with the main body. Thus, the power generation device can be installed on a rechargeable speaker, and the power generation component can be electrically connected to a battery in the rechargeable speaker. In use, the sound waves generated by the rechargeable speaker enter the sound wave collecting cavity through the opening on the main body, thereby exciting the main body to resonate. Subsequently, the power generation component resonates with the main body, generating electrical energy during vibration, which is then transmitted and stored in the battery. This fully utilizes sound energy for power generation, effectively increasing battery capacity and improving the battery life of the rechargeable speaker, solving the problem of poor battery life in related technologies, which affects the user experience. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0022] Figure 1 is a schematic diagram of the installation structure of a power generation device provided in an embodiment of this application;

[0023] Figure 2 is a schematic diagram of the installation structure of the extension tube in a power generation device according to an embodiment of this application;

[0024] Figure 3 is a schematic diagram of the installation structure of the extension tube in a power generation device according to an embodiment of this application;

[0025] Figure 4 is a schematic diagram of the installation structure of the extension tube in a power generation device according to an embodiment of this application;

[0026] Figure 5 is a schematic diagram of the installation structure of the power generation component in a power generation device provided in an embodiment of this application;

[0027] Figure 6 is a schematic diagram of the installation structure of a local resonance unit in a power generation device provided in an embodiment of this application;

[0028] Figure 7 is a structural schematic diagram of a speaker provided in an embodiment of this application;

[0029] Figure 8 is a schematic diagram of the installation structure of the power module and circuit module in a speaker according to an embodiment of this application;

[0030] Figure 9 is a structural schematic diagram of a speaker with multiple power generation devices provided in an embodiment of this application;

[0031] Figure 10 is a schematic diagram of a power generation device in a speaker according to an embodiment of this application;

[0032] Figure 11 is a frequency response curve of a speaker provided in an embodiment of this application.

[0033] Explanation of reference numerals in the attached figures:

[0034] 10-Speaker body;

[0035] 20 - Power supply module;

[0036] 30 - Circuit Module;

[0037] 40-speaker;

[0038] 100 - Main body of the device;

[0039] 110 - Sound wave collecting cavity; 111 - Opening;

[0040] 120 - Resonator body;

[0041] 130-Substrate;

[0042] 140 - Extension tube;

[0043] 200 - Generating components;

[0044] 300-local resonant units;

[0045] 310 - Resonant core; 320 - Elastic connecting layer.

[0046] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0047] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0048] In related technologies, as living standards improve, rechargeable speakers are becoming increasingly popular due to their advantages such as portability, wireless connectivity, and lightweight design.

[0049] A rechargeable speaker includes a cabinet, a speaker housed inside the cabinet, and a battery. In use, sound is played through the speaker, and the battery powers the speaker.

[0050] However, the energy density and charging efficiency of the batteries in these rechargeable speakers significantly limit their battery life, resulting in poor performance and impacting the user experience. This is especially true when used outdoors (without charging), where the limited battery life can severely affect the user experience.

[0051] Based on this, to improve the battery life of rechargeable speakers, this application provides a power generation device and a speaker. The power generation device includes: a device body with a sound wave collecting cavity inside, and an opening communicating with the sound wave collecting cavity. The sound wave collecting cavity collects sound waves and causes the device body to resonate under the influence of the sound waves; and a power generation component disposed on the device body, which generates electrical energy when resonating with the device body. Thus, the power generation device can be installed on the rechargeable speaker, and the power generation component can be electrically connected to the battery in the rechargeable speaker. In use, the sound waves generated by the rechargeable speaker enter the sound wave collecting cavity through the opening on the device body, thereby exciting the device body to resonate. Subsequently, the power generation component resonates with the device body, generating electrical energy during vibration, which is then transmitted and stored in the battery. This fully utilizes sound energy for power generation, effectively increasing battery capacity and improving the battery life of the rechargeable speaker, solving the problem of poor battery life in rechargeable speakers in related technologies, which affects the user experience.

[0052] The technical solution of this application and how it solves the above-mentioned technical problems will be described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will be described below with reference to the accompanying drawings.

[0053] As shown in Figures 1 and 2, an embodiment of this application provides a power generation device, comprising:

[0054] The device body 100 has a sound wave collecting cavity 110 inside it. The device body 100 has an opening 111 that communicates with the sound wave collecting cavity 110. The sound wave collecting cavity 110 is used to collect sound waves and make the device body 100 resonate under the action of sound waves.

[0055] The power generation component 200 is installed on the main body 100 of the device and is used to generate electrical energy when it resonates with the main body 100 of the device.

[0056] The shapes of the device body 100 and the sound wave collecting cavity 110 are not limited, as long as at least one end of the device body 100 has an opening 111 that communicates with the sound wave collecting cavity 110.

[0057] In this embodiment, the power generation device is used in the field of rechargeable speakers as an example. Of course, this power generation device can also be used in other devices that require charging for extended battery life.

[0058] To address this, the power generation device can be installed on the rechargeable speaker, and the power generation unit 200 can be electrically connected to the battery in the rechargeable speaker.

[0059] In use, the sound waves generated by the rechargeable speaker enter the sound wave collecting cavity 110 through the opening 111 on the main body 100, thereby exciting the main body 100 to resonate. Subsequently, the power generation component 200 resonates along with the main body 100, generating electrical energy during resonance, which is then transmitted and stored in the battery. This fully utilizes sound energy for power generation, effectively increasing battery capacity and improving the rechargeable speaker's battery life, solving the problem of poor battery life in rechargeable speakers in related technologies, which affects the user experience.

[0060] Therefore, during implementation, a rectifier device can be installed between the generator 200 and the battery, so that the generator 200 is indirectly connected to the battery through the rectifier device. Thus, the electrical energy generated by the generator 200 can be rectified, boosted, and stabilized by the rectifier device before being supplied to the battery, ensuring the effective transmission and storage of electrical energy.

[0061] It should be noted that the power generation component 200 can be a piezoelectric material layer, which can be made of piezoelectric ceramics, piezoelectric single crystals and ceramic composite materials, piezoelectric polymers, organic-inorganic hybrid materials, or piezoelectric semiconductor materials, etc. This allows the piezoelectric material layer to deform and generate electrical energy when the main body 100 of the device vibrates due to collecting acoustic energy, thereby converting acoustic energy into electrical energy.

[0062] As shown in Figure 2, in some embodiments, the main body 100 of the device includes a resonator body 120 and a substrate 130. The resonator body 120 is connected to the substrate 130 and together they enclose the sound wave collecting cavity 110.

[0063] The power generation component 200 is connected to the base plate 130.

[0064] It should be noted that the resonator body 120 can be a Helmholtz resonator or other resonators. The substrate 130 can be a plate made of any material with a certain rigidity, such as aluminum, steel, or rubber. Since the shape of the acoustic wave collecting cavity 110 enclosed by the resonator body 120 and the substrate 130 is not limited, that is to say, the shapes of both the resonator body 120 and the substrate 130 are not limited.

[0065] In this embodiment, the resonator body 120 is configured as a square structure with a hollow interior, which serves as a sound wave collecting cavity 110. The opening of the sound wave collecting cavity 110 faces upwards and is located at the upper end of the resonator body 120.

[0066] The resonator body 120 has open ends in the horizontal direction, and the two substrates 130 respectively cover the open ends of the resonator body 120 in the horizontal direction. Thus, the resonator body 120 and the two substrates 130 together enclose the sound wave collecting cavity 110. At this time, the power generating element 200 (i.e., the piezoelectric material layer) is disposed on the substrate 130.

[0067] Therefore, the sound waves generated when the rechargeable speaker is working will enter the sound wave collection cavity 110 through the opening on the resonator body 120. When the sound wave frequency is consistent with the acoustic vibration coupling frequency of the device body 100 and the sound wave collection cavity 110 inside, the substrate 130 is excited to resonate, which can greatly amplify the vibration amplitude and drive the power generation component 200 to deform, thereby converting sound energy into electrical energy.

[0068] In practice, the substrate 130 can be connected to the resonator body 120 by bonding, screwing, welding or other means; the power generation component 200 can be connected to the substrate 130 by bonding, screwing or other means, without limitation.

[0069] As shown in Figure 2, in some embodiments, the resonator body 120 is provided with an extension tube 140. The width of the extension tube 140 is smaller than the width of the sound wave collecting cavity 110. The interior of the extension tube 140 is connected to the sound wave collecting cavity 110, and an opening 111 is formed at one end of the extension tube 140 away from the sound wave collecting cavity 110.

[0070] As shown in Figure 2, one end of the extension tube 140 can be connected to the resonator body 120 by integral molding, bonding, screwing, or other means. The other end of the extension tube 140 can be located outside the sound wave collecting cavity 110 (which is also equivalent to the outside of the resonator body 120). The interior of the extension tube 140 communicates with the sound wave collecting cavity 110. The end of the extension tube 140 away from the sound wave collecting cavity 110 forms an opening 111, and the width (or diameter) of the extension tube 140 is smaller than the width of the sound wave collecting cavity 110, thus forming a structure of a small tube and a large cavity. The shape of the extension tube 140 is not limited; for example, it can be a square tube, a round tube, or other shapes.

[0071] Thus, the sound waves generated by the rechargeable speaker can enter the sound wave collecting cavity 110 through the opening on the extension tube 140, that is, the sound waves enter the large cavity through the small tube.

[0072] In some embodiments, as shown in FIG3, the extension tube 140 may also be located inside the acoustic wave collecting cavity 110.

[0073] In other words, the other end of the extension tube 140 can be located inside the sound wave collecting cavity 110. Thus, when the power generation device is installed inside the rechargeable speaker, embedding the extension tube 140 inside the sound wave collecting cavity 110 can reduce the space occupied by the extension tube 140 inside the rechargeable speaker.

[0074] Furthermore, considering the high low-frequency sound pressure inside the rechargeable speaker, the acoustic-vibration coupling mode frequency of the device body 100 and its internal sound wave collecting cavity 110 should be set as low as possible to more effectively convert sound energy into electrical energy. Therefore, in order to obtain a lower acoustic-vibration coupling mode frequency for the device body 100, in some embodiments, as shown in FIG4, when the extension tube 140 is located inside the sound wave collecting cavity 110, the extension tube 140 can also be set as a curved tube.

[0075] Therefore, the length of the extension tube 140 can be extended within the limited space of the acoustic wave collection cavity 110, so that the main body of the device 100 can obtain a lower acoustic-vibration coupling mode frequency.

[0076] In other embodiments, when the extension tube 140 is located outside the acoustic wave collecting cavity 110, the extension tube 140 can also be configured as a curved tube.

[0077] As shown in FIG5, in some embodiments, at least one power generation element 200 is disposed on the inner surface of the substrate 130, and at least one power generation element 200 is disposed on the outer surface of the substrate 130.

[0078] It should be noted that, with the number of substrates 130 remaining unchanged, since substrate 130 has a side facing the acoustic wave collecting cavity 110 (i.e., the inner surface) and a side facing away from the acoustic wave collecting cavity 110 (i.e., the outer surface), in order to collect more electrical energy, the mounting area on substrate 130 can be fully utilized to set up the power generation device 200. In other words, the surface area of ​​substrate 130 can be fully utilized to set up the power generation device 200.

[0079] Therefore, at least one power generation element 200 can be disposed on the inner surface of the substrate 130, and at least one power generation element 200 can be disposed on the outer surface of the substrate 130. It is understood that there is no limitation on the number of power generation elements 200 on the inner or outer surface of the substrate 130, for example, there can be one, two, three or other numbers.

[0080] In this embodiment, a power generation device 200 is provided on both the inner and outer surfaces of the substrate 130.

[0081] Therefore, the number of power generation components 200 can be appropriately increased according to actual needs, so that when the substrate 130 resonates, multiple power generation components 200 can generate electricity together, effectively increasing the power generation and further facilitating the improvement of the battery life of the rechargeable speaker.

[0082] In addition, in order to collect more electrical energy, in some embodiments, as shown in FIG6, a plurality of local resonant units 300 may be provided on the substrate 130, and the local resonant units 300 are located on the periphery of the power generation device 200. That is, the plurality of local resonant units 300 are evenly distributed on the outer side of the substrate 130 corresponding to the coverage surface of the power generation device 200.

[0083] In practice, multiple local resonant units 300 can be provided only on the outer or inner surface of the substrate 130, and the multiple local resonant units 300 can be evenly distributed on the outer side of the coverage surface of the corresponding power generation device 200 on the substrate 130.

[0084] In practice, multiple local resonant units 300 can be provided on both the outer and inner surfaces of the substrate 130, and the multiple local resonant units 300 can be evenly distributed on the outer side of the coverage surface of the corresponding power generation device 200 on the substrate 130.

[0085] In this embodiment, a plurality of local resonant units 300 are disposed on the outer surface of the substrate 130, and the plurality of local resonant units 300 are evenly distributed on the outer side of the coverage surface of the corresponding power generation device 200 on the substrate 130. In this case, the power generation device 200 can be disposed only on the outer surface of the substrate 130. Of course, if the power generation device 200 is disposed on both the inner and outer surfaces of the substrate 130, the power generation devices 200 on the inner and outer sides of the substrate 130 can be symmetrically distributed, thereby reducing the possibility of the local resonant units 300 interfering with the power generation devices 200 on the inner and outer sides of the substrate 130.

[0086] For example, the multiple local resonant units 300 can be distributed in a linear array, or they can be distributed in a circular array around the power generator 200, without limitation.

[0087] This causes the local resonant unit 300 to form a defect-state phononic crystal, thereby forming a sound energy convergence zone. This concentrates the sound wave energy at the location where the local resonant unit 300 is removed (i.e., the area where the local resonant unit 300 is not set), thereby improving the energy conversion efficiency of the power generation device 200 and enabling it to convert sound energy into electrical energy more effectively.

[0088] Furthermore, as shown in Figure 6, the local resonance unit 300 includes a resonance core 310 and an elastic connection layer 320, with the resonance core 310 connected to the substrate 130 through the elastic connection layer 320.

[0089] The resonant core 310 is made of high-density, high-rigidity materials, such as lead, copper, steel, ceramics, and tungsten. The elastic connecting layer 320 is made of low-rigidity, high-elasticity materials, such as rubber, silicone, polyurethane foam, and flexible polymers.

[0090] In practice, the resonant core 310 and the elastic connection layer 320 can be connected by bonding, nesting or other means. The elastic connection layer 320 can be connected to the substrate 130 by bonding, nesting, screwing or other means.

[0091] Therefore, the combination of the high-density resonant core 310 and the low-stiffness elastic connecting layer 320 can dynamically adjust the resonant frequency and selectively absorb sound energy in specific frequency bands.

[0092] In summary, the power generation device provided in this application embodiment allows sound waves generated by the rechargeable speaker to enter the sound wave collection cavity 110 through the opening 111 on the device body 100, thereby exciting the device body 100 to resonate. Subsequently, the power generation component 200 can generate electrical energy when the device body 100 resonates, and then transmit and store the electrical energy in the battery. This fully utilizes sound energy for power generation, effectively increasing battery capacity and improving the battery life of the rechargeable speaker, solving the problem of poor battery life in related technologies, which affects the user experience.

[0093] As shown in Figures 7 and 8, an embodiment of this application provides a speaker, such as a rechargeable speaker, which includes a speaker body 10, a power module 20 disposed on the speaker body 10, and a power generation device as described in any of the above embodiments. The power generation device has a power generation component 200 that is electrically connected to the power module 20.

[0094] The power generation device has been described in detail in the above embodiments and will not be repeated here. The speaker body 10 has an inner cavity, and the power module 20 and the power generation device can be installed in the inner cavity of the speaker body 10 by gluing, screwing, snapping or other means.

[0095] The power module 20 may include a battery and an ambient light, Bluetooth module, or sensor electrically connected to the battery. During installation, the power generator 200 can be electrically connected to the battery or other components in the power module 20. The speaker may also include a speaker 40 mounted on the speaker body 10, which is electrically connected to the battery and used to play sound.

[0096] Therefore, the sound waves generated by the rechargeable speaker enter the sound wave collecting cavity 110 through the opening 111 on the main body 100, thereby exciting the main body 100 to resonate. Subsequently, the power generation component 200 can generate electrical energy when the main body 100 resonates. The electrical energy can then be delivered and stored in the battery in the power module 20 (equivalent to replenishing the battery's charge), or it can be directly used to power other components in the power module 20 (equivalent to replacing the battery to power the corresponding components, reducing the battery's power consumption).

[0097] This fully utilizes sound energy to generate electricity, effectively improving the battery life of rechargeable speakers and solving the problem of poor battery life in rechargeable speakers in related technologies, which in turn affects the user experience.

[0098] It should be noted that this embodiment does not limit the type and shape of the speaker enclosure, or the number and type of the loudspeakers 40. The speaker enclosure type can be a sealed enclosure, a bass-reflex enclosure, a passive radiator enclosure, an acoustic labyrinth enclosure, an acoustic metamaterial enclosure, or a bandpass enclosure. If the speaker enclosure is a bandpass enclosure, the power generation device can be located in the rear cavity or the front cavity of the enclosure. The speaker enclosure shape can be any shape, such as a cylinder, hexagonal prism, or cuboid.

[0099] In practice, to collect more electrical energy, as shown in Figure 9, multiple power generation devices can also be installed inside the speaker body 10. Each power generation device can then convert sound energy into electrical energy to power the power module 20, thereby further enhancing the battery life of the rechargeable speaker.

[0100] In some embodiments, as shown in FIG8, the speaker further includes a circuit module 30, a power generation device 200 is electrically connected to the circuit module 30, and the circuit module 30 is electrically connected to the power consumption module 20.

[0101] And / or, as shown in Figure 10, the power generation device is disposed inside the speaker body 10, and the power generation device is located at the upper or lower part of the speaker body 10, with the opening 111 in the power generation device facing the side of the speaker body 10.

[0102] The circuit module 30 can be an existing product with rectification, boost and regulation functions, such as an integrated rectifier, boost converter, and regulator.

[0103] At this point, the generator 200 can be electrically connected to the circuit module 30, and the circuit module 30 can be electrically connected to the power consumption module 20 (which can be a battery or other components). The electrical energy generated by the generator 200 can then be processed by the circuit module 30 (i.e., rectified, boosted, and regulated) before being delivered to the power consumption module 20, ensuring efficient use of electrical energy and improving reliability.

[0104] It should be noted that when the speaker is working, the acoustic modes inside the speaker body 10 are excited, causing the frequency response curve of the speaker to have troughs or peaks. Therefore, a power generation device can be set at the antinode of the acoustic mode. This allows the opening 111 in the power generation device to be located near the antinode of the standing wave mode, enabling the power generation device to collect acoustic energy and generate electricity, while also giving the speaker in this application the function of a smooth frequency response curve compared to the original speaker (as shown in Figure 11).

[0105] In summary, the speaker provided in this application embodiment allows sound waves generated during operation of the rechargeable speaker to enter the sound wave collecting cavity 110 through the opening 111 on the main body 100, thereby exciting the main body 100 to resonate. Subsequently, the power generation component 200 can generate electrical energy when the main body 100 resonates. This electrical energy can then be delivered and stored in the battery in the power module 20 (equivalent to replenishing the battery's charge), or it can be directly used on other components in the power module 20 (equivalent to replacing the battery to power the corresponding components, reducing the battery's power consumption). This fully utilizes sound energy for power generation, effectively improving the battery life of the rechargeable speaker and solving the problem of poor battery life in related technologies, which affects the user experience.

[0106] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A power generation device, characterized in that, include: The device body (100) has a sound wave collecting cavity (110) inside and an opening (111) communicating with the sound wave collecting cavity (110). The sound wave collecting cavity (110) is used to collect sound waves and make the device body (100) resonate under the action of the sound waves. The device power generation component (200) is disposed on the device body (100) and is used to generate electrical energy when resonating with the device body (100).

2. The power generation device according to claim 1, characterized in that, The main body (100) of the device includes a resonator body (120) and a substrate (130). The resonator body (120) is connected to the substrate (130) and together they enclose the acoustic wave collection cavity (110). The power generation device (200) is connected to the substrate (130).

3. The power generation device according to claim 2, characterized in that, The resonator body (120) is provided with an extension tube (140), the width of the extension tube (140) is smaller than the width of the sound wave collecting cavity (110), the interior of the extension tube (140) is connected to the sound wave collecting cavity (110), and the end of the extension tube (140) away from the sound wave collecting cavity (110) forms the opening (111).

4. The power generation device according to claim 3, characterized in that, The extension tube (140) is located inside the acoustic wave collecting cavity (110).

5. The power generation device according to claim 3, characterized in that, The extension tube (140) is a curved tube.

6. The power generation device according to claim 2, characterized in that, At least one of the power generation elements (200) is disposed on the inner surface of the substrate (130), and at least one of the power generation elements (200) is disposed on the outer surface of the substrate (130).

7. The power generation device according to any one of claims 2-6, characterized in that, A plurality of local resonant units (300) are disposed on the substrate (130), and the local resonant units (300) are located around the power generation device (200).

8. The power generation device according to claim 7, characterized in that, The local resonant unit (300) includes a resonant core (310) and an elastic connection layer (320), wherein the resonant core (310) is connected to the substrate (130) through the elastic connection layer (320).

9. A speaker, characterized in that, The device includes a speaker body (10), an electrical module (20) disposed on the speaker body (10), and a power generation device according to any one of claims 1-8, wherein the power generation component (200) in the power generation device is electrically connected to the electrical module (20).

10. The speaker according to claim 9, characterized in that, It also includes a circuit module (30), the power generation device (200) is electrically connected to the circuit module (30), the circuit module (30) is electrically connected to the power consumption module (20); and / or, the power generation device is disposed inside the speaker body (10), the power generation device is located at the upper or lower part of the speaker body (10), and the opening (111) in the power generation device faces the side of the speaker body (10).

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