Loudspeaker and sound producing device

Abstract

The utility model discloses a loudspeaker and sounding device, wherein, the loudspeaker includes shell, magnetic circuit structure, vibration structure and resonance structure. The connecting cavity is seted up on the shell, and the flow resistance assembly is arranged in the connecting cavity. The magnetic circuit structure and vibration structure are installed in the shell, and form the cavity with the shell, and the resonance structure is connected to the outside of the shell, and the resonance cavity is seted up in the inside, and the resonance cavity is communicated with the cavity. Through setting resonance structure, and utilizing connecting cavity to make resonance cavity and cavity communicate, setting flow resistance assembly in resonance cavity, the low frequency extension is optimized, and the bandwidth is expanded, and better hearing effect is realized.

Description

Technical Field

[0001] This utility model relates to the field of loudspeaker technology, specifically to a loudspeaker and a sound-generating device. Background Technology

[0002] Bandwidth refers to the total frequency range of a system's effective response, divided by the system's highest and lowest effective frequencies. Outside of this bandwidth, the signal amplitude attenuates significantly. Traditional tweeters generally have good high-frequency extension but poor low-frequency extension and limited bandwidth, resulting in the loss of sound details and making it difficult to reproduce all sound information. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a loudspeaker and a sound-generating device that optimizes low-frequency extension, expands bandwidth, and achieves better auditory effects.

[0004] In a first aspect, embodiments of the present invention provide a loudspeaker, comprising:

[0005] The outer casing has a connecting cavity, and a flow resistance assembly is provided inside the connecting cavity;

[0006] A magnetic circuit structure and a vibration structure are installed inside the housing, and a cavity is formed between the magnetic circuit structure, the vibration structure, and the housing;

[0007] A resonant structure is connected to the outside of the outer shell, and a resonant cavity is provided inside the resonant structure. The resonant cavity is connected to the cavity through the connecting cavity.

[0008] Optionally, the flow resistance assembly includes a plurality of protruding structures, which are symmetrically arranged on the inner wall of the connecting cavity along the length direction of the connecting cavity.

[0009] Optionally, the flow resistance component is a plurality of toothed protrusions or a plurality of semi-cylindrical protrusions.

[0010] Optionally, it also includes a bracket, on which the magnetic circuit structure and the vibration structure are disposed. The bracket is connected to the outer shell, and a through hole is provided on the bracket. The connecting cavity and the cavity communicate through the through hole.

[0011] Optionally, the resonant structure is annular and surrounds the outer side of the housing.

[0012] Optionally, the resonant structure is disposed on one side of the housing.

[0013] Optionally, the cross-section of the resonant cavity is rectangular or elliptical.

[0014] Optionally, the magnetic circuit structure includes a magnetic guide plate, a central magnet, and a yoke stacked sequentially from top to bottom, with a magnetic gap formed between the yoke, the central magnet, and the magnetic guide plate, and the yoke connected to the support.

[0015] Optionally, the vibrating structure includes a diaphragm, a surround, a voice coil support, and a voice coil. The diaphragm is connected to the edge of the surround, the outer side of the surround is connected to the inner wall of the housing and the support, the voice coil support is connected to the diaphragm and the bottom end of the voice coil support extends into the magnetic gap, and the voice coil is located in the magnetic gap and connected to the outer side of the voice coil support.

[0016] Secondly, this utility model embodiment provides a sound-generating device, including:

[0017] The speaker as described above;

[0018] Mounting bracket, attached to the exterior of the speaker housing.

[0019] This utility model provides a loudspeaker and a sound-generating device. The loudspeaker includes a housing, a magnetic circuit structure, a vibration structure, and a resonant structure. A connecting cavity is formed on the housing, and a flow-resistance component is disposed within the connecting cavity. The magnetic circuit structure and the vibration structure are installed inside the housing, forming a cavity with the housing. The resonant structure is connected to the outside of the housing, and a resonant cavity is formed inside it, communicating with the cavity through the connecting cavity. By setting up the resonant structure and utilizing the connecting cavity to connect the resonant cavity with the cavity, and by placing a flow-resistance component within the resonant cavity, low-frequency extension is optimized, bandwidth is expanded, and a better auditory effect is achieved. Attached Figure Description

[0020] The above and other objects, features and advantages of the present invention will become clearer from the following description of embodiments of the present invention with reference to the accompanying drawings, in which:

[0021] Figure 1 This is a perspective view of a speaker according to an embodiment of the present invention;

[0022] Figure 2 This is a top view schematic diagram of a speaker according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic cross-sectional view of a loudspeaker according to an embodiment of the present invention;

[0024] Figure 4 This is a three-dimensional cross-sectional view of a speaker according to an embodiment of the present invention;

[0025] Figure 5 This is a top view schematic diagram of a speaker according to another embodiment of the present invention;

[0026] Figure 6 This is a schematic cross-sectional view of a loudspeaker according to another embodiment of the present invention;

[0027] Figure 7 This is a three-dimensional cross-sectional view of a speaker according to another embodiment of the present invention;

[0028] Figure 8 This is a partially enlarged schematic diagram of a flow resistance component according to an embodiment of the present invention;

[0029] Figure 9 This is a partially enlarged schematic diagram of a flow resistance component according to another embodiment of the present invention;

[0030] Figure 10 This is a sound pressure level curve of existing technology products;

[0031] Figure 11 This is a sound pressure curve diagram of one embodiment of the present invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1-Outer shell; 2-Resonant structure; 21-Resonant cavity; 22-Connecting cavity; 23-Flow resistance assembly; 3-Magnetic circuit structure; 31-Magnetic guide plate; 32-Center magnet; 33-Yoke; 4-Vibration structure; 41-Diaphragm; 42-Boom; 43-Voice coil support; 44-Voice coil; 5-Support; 51-Through hole; 6-Protective frame. Detailed Implementation

[0034] The present application is described below based on embodiments, but it is not limited to these embodiments. In the detailed description of the present application below, certain specific details are described in detail. Those skilled in the art can fully understand the present application without these details. To avoid obscuring the substance of the present application, well-known methods, processes, flows, elements, and circuits are not described in detail.

[0035] Furthermore, those skilled in the art should understand that the accompanying drawings provided herein are for illustrative purposes only and are not necessarily drawn to scale.

[0036] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] For ease of explanation, spatially related terms such as “inside,” “outside,” “below,” “below,” “lower,” “above,” “upper,” etc., are used herein to describe the relationship between one element or feature illustrated in the figure and another. It will be understood that spatially related terms may be intended to encompass different orientations of the device in use or operation besides those depicted in the figure. For example, if the device in the figure is flipped, an element described as “below” or “below” another element or feature would then be positioned “above” that other element or feature. Thus, the exemplified term “below” can encompass both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially related descriptive terms used herein should be interpreted accordingly.

[0038] Unless the context explicitly requires it, words such as "including" or "contains" throughout the application should be interpreted as including rather than exclusive or exhaustive; that is, meaning "including but not limited to".

[0039] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0040] A Helmholtz resonator is a cavity structure capable of producing strong resonance for sound waves of a specific frequency. It typically consists of a closed cavity and a narrow neck. The closed cavity, the main resonant cavity, is filled with air, forming an air column. The narrow neck connects the cavity to the external environment. When the frequency of external sound waves approaches the natural frequency of the Helmholtz resonator, the air vibrates violently in the neck, causing significant absorption or concentration of sound energy. To extend the low-frequency extension of a loudspeaker, a Helmholtz resonator can be placed on the loudspeaker, and its resonant frequency can be tuned to near the target frequency. This ensures that the Helmholtz resonator vibrates near the target frequency, thus compensating for the loudspeaker's bandwidth.

[0041] Figure 3 yes Figure 2 A planar sectional view obtained by cutting the middle loudspeaker along the AA direction. Figure 4 yes Figure 2 A three-dimensional sectional view obtained by cutting the middle loudspeaker along the AA direction.

[0042] Reference Figures 1-4The loudspeaker of this embodiment includes a housing 1, a magnetic circuit structure 3, a vibration structure 4, and a resonant structure 2. The magnetic circuit structure 3 and the vibration structure 4 are installed inside the housing 1 and protected by it. The magnetic circuit structure 3 forms a magnetic field, enabling the current-driven vibration structure 4 to vibrate and produce sound within a magnetic gap. The resonant structure 2 is connected to the outside of the housing 1 and can generate resonance, adjusting the sound production state of the vibration structure 4 to achieve better sound output. It should be understood that the accompanying drawings are merely examples; the shape of the housing 1 is not limited to a circle, but can also be rectangular or other shapes to adapt to different sound production needs and installation scenarios.

[0043] Reference Figures 3-4 A cavity is formed between the magnetic circuit structure 3, the vibration structure 4, and the outer shell 1. A resonance cavity 21 is provided inside the resonance structure 2, and the resonance cavity 21 is connected to the cavity, allowing vibration to be directly transmitted from the cavity to the resonance cavity 21. Connecting the resonance cavity 21 to the cavity simplifies the structure, allows the vibration of the vibration structure 4 to be directly reflected in the resonance cavity 21, reduces energy loss, and makes the vibration regulation of the resonance cavity 21 clearer and more controllable. In this embodiment, the resonance cavity 21 and the connecting cavity 22 form a Helmholtz resonance cavity, with the resonance cavity 21 forming the main resonance cavity and the connecting cavity 22 forming the neck.

[0044] Specifically, such as Figures 3-4 As shown, a connecting cavity 22 is provided on the outer shell 1, with both ends of the connecting cavity 22 open. The resonant cavity 21 is connected to the cavity through the connecting cavity 22. The cross-sectional area of ​​the connecting cavity 22 is smaller than that of the resonant cavity 21, that is, the closed resonant cavity 21 is connected to the cavity through the narrow connecting cavity 22, forming a Helmholtz resonant cavity. By setting the resonant structure 2 and connecting the resonant cavity 21 to the cavity, when the vibrating structure 4 vibrates, the air in the resonant cavity 21 is excited and resonates near the low frequency, realizing the supplementation of the speaker in the low frequency range, making up for the energy attenuated by the vibrating structure 4 at the low frequency, optimizing the low frequency extension of the speaker, expanding the bandwidth, and achieving a better listening effect.

[0045] Figure 6 yes Figure 2 A planar sectional view obtained by cutting the middle loudspeaker along the CC direction. Figure 7 yes Figure 2 A three-dimensional sectional view obtained by cutting the middle loudspeaker along the CC direction.

[0046] The shape and volume of the resonant cavity 21, as well as the cross-sectional area and length of the connecting cavity 22, all affect the resonance effect. (Refer to...) Figures 1-7The resonant structure 2 can be formed as a ring or a cube. The cross-section of the inner cavity 21 can be rectangular or elliptical. The turning points of the inner wall of the resonant cavity 21 can be formed as sharp edges or smooth curved surfaces. The number of connecting cavities 22 can be one or more, and multiple connecting cavities 22 can have different cross-sectional area dimensions. Depending on the requirements, the thickness of the resonant structure 2 may be less than, greater than, or equal to the thickness of the outer shell 1. Different structural configurations can bring different resonance characteristics to meet different bandwidth adjustment requirements.

[0047] Figure 10 , Figure 11 The figures show the sound pressure curves of a loudspeaker in the prior art and the loudspeaker in this embodiment under the same conditions.

[0048] Figures 10-11 The diagram shows sound pressure level curves for loudspeakers with different structures. Because it's necessary to ensure audio information such as volume and sound quality, sound information will be lost when the loudness falls below a certain value. This is used to define the effective bandwidth of the loudspeaker, such as... Figure 10 As shown, the bandwidth of existing loudspeakers is approximately between 1200 Hz and 20 kHz. Below 1200 Hz, the loudness decreases significantly due to substantial energy attenuation, making it difficult to maintain sound detail. However, the loudspeaker in this application, by incorporating a resonant structure 2, allows its frequency response curve to extend to even lower frequencies while maintaining consistent high-frequency extension. Figure 11 As shown, the improved speaker has a bandwidth of approximately 1000 Hz to 20 kHz. The speaker's sound pressure level curve extends significantly into the low-frequency range, while the high-frequency range is not significantly affected, effectively expanding the bandwidth.

[0049] Specifically, such as Figures 1-4 As shown, the resonant structure 2 is rectangular and disposed on one side of the outer shell 1, thus forming a rectangular cavity 21. The connecting cavity 22 connects the resonant cavity 21 to the empty cavity. Depending on actual needs, the connecting cavity 22 can be formed as a rectangular cavity, a cylindrical cavity, or a cavity of other shapes. Further, as... Figure 4 As shown, the resonant cavity 21 is often formed by multiple planes, so its inner wall usually also has multiple bends, forming edges. The resonant cavity 21 with bends forming edges has a simple structure and is easier to manufacture. In some embodiments, the smoothness of the bends can also be different. Specifically, the bends can also be formed as smooth curved surfaces, so that the cross-section of the inner cavity of the resonant cavity 21 is elliptical, in order to reduce energy loss at the corners, make low-frequency attenuation slower, improve low-frequency extension, and increase bandwidth.

[0050] Furthermore, changing the cross-sectional area of ​​the connecting cavity 22 can also alter the resonant frequency, thus adjusting the bandwidth. Under otherwise unchanged conditions, a larger cross-sectional area of ​​the connecting cavity 22 results in a relatively higher resonant frequency; conversely, a smaller cross-sectional area results in a relatively lower resonant frequency. In some embodiments, the resonant frequency of the resonant cavity 21 can also be adjusted by changing the length of the connecting cavity 22. Under otherwise unchanged conditions, a longer length of the connecting cavity 22 results in a relatively lower resonant frequency; conversely, a shorter length results in a relatively higher resonant frequency. By changing the cross-sectional area and length of the connecting cavity 22, the resonant frequency of the resonant cavity 21 can be matched with the vibration frequency of the vibrating structure 4, avoiding the problem of separation between the vibration frequency of the resonant cavity 21 and the vibration frequency of the vibrating structure 4.

[0051] Similarly, setting multiple resonant structures 2 can also affect the low-frequency extension of the speaker. Depending on the actual situation, two resonant structures 2 can be set at symmetrical positions on the housing 1, or two or more resonant structures 2 with different included angles can be set as needed. At the same time, the corresponding resonant cavities 21 are also connected to the cavity through different connecting cavities 22, forming multiple Helmholtz resonant cavities. These Helmholtz resonant cavities can have the same structure or different structures. For Helmholtz resonant cavities with different structures, such as different cross-sectional areas of connecting cavities 22 and different volumes of resonant cavities 21, their resonant frequencies are also different. By adjusting the structure and position of different Helmholtz resonant cavities, the low-frequency extension of the speaker can be further improved and the bandwidth expanded.

[0052] Figure 8 yes Figure 3 A partially enlarged schematic diagram of structure B in the middle. Figure 9 It shows Figure 8 Another embodiment of the structure.

[0053] In some embodiments, such as Figure 3 , Figures 8-9 As shown, a flow resistance component 23 is provided on the inner wall of the connecting cavity 22, which further reduces the resonant frequency of the resonant cavity 21, causing the frequency response curve to extend to lower frequencies. The flow resistance component 23 includes multiple protruding structures, which are symmetrically arranged on the inner wall of the connecting cavity 22 along its length. The flow resistance component 23 increases the flow resistance of the connecting cavity 22, slows down the vibration propagation speed, and effectively increases the acoustic length of the connecting cavity 22, thus lowering the resonant frequency. Using the flow resistance component 23 allows for more precise adjustment of the resonant frequency and makes the extension of the frequency response curve at low frequencies smoother.

[0054] Specifically, refer to Figure 8 , Figure 9The flow resistance component 23 can be configured as multiple toothed protrusions or multiple semi-cylindrical protrusions. It should be understood that the descriptions and accompanying drawings are merely examples; the shape of the flow resistance component 23 is not limited to a combination of toothed or semi-cylindrical protrusions, but can also be wavy or other shapes. The arrangement of the flow resistance components 23 is not limited to a close arrangement or a row-like arrangement, but can also be spaced out or staggered. Depending on the actual situation, the flow resistance components 23 can be located on the side of the connecting cavity 22 near the resonant cavity 21, or on the side near the cavity, or evenly distributed throughout the connecting cavity 22 along its length. Similarly, the flow resistance components 23 can be located only on the upper and lower sides, or on the left and right sides of the connecting cavity 22, or separately on the upper and lower sides and the left and right sides of the connecting cavity 22. Changing the distribution density and length of the flow resistance components 23 allows for adjustment of the resonant frequency to obtain better acoustic effects.

[0055] like Figure 5 As shown, the resonant structure 2 is formed as a ring and surrounds the outer side of the outer shell 1, making the speaker structure more symmetrical, easier to install, and providing better stress distribution and stronger mechanical stability when subjected to external impacts. In this case, the resonant cavity 21 is formed as a ring cavity, which has better geometric symmetry, fewer right-angle bends within the cavity, and allows vibration to propagate along the ring, resulting in a more uniform sound wave reflection path. Simultaneously, the ring-shaped resonant cavity 21 often has a larger cavity volume, further reducing the resonant frequency. Similarly, the smoothness of the bends in the ring-shaped resonant cavity 21 can vary, and the cross-section of the inner cavity of the resonant cavity 21 can be rectangular or elliptical. Specifically, refer to... Figure 6 , Figure 7 The turning point can also be formed into a smooth curved surface to reduce energy loss at the corners, slow down the low-frequency decay, improve the low-frequency extension, and increase the bandwidth.

[0056] Furthermore, the annular resonant cavity 21 also facilitates the creation of multiple connecting cavities 22. Depending on actual needs, multiple connecting cavities 22 can be configured to connect the resonant cavity 21 to the cavity, allowing vibrations to excite the air within the resonant cavity 21 from multiple different directions, adapting to a wider range of adjustment requirements and achieving a superior bandwidth extension effect. For example, symmetrically positioned connecting cavities 22 allow vibrations to enter the resonant cavity 21 symmetrically, achieving a more uniform sound field distribution and reducing phase cancellation of vibrations. Depending on the specific situation, resonant cavities 21 with different angles can also be configured to adjust the low-frequency vibration effect. The cross-sectional area of ​​different connecting cavities 22 can also be different. Since different cross-sectional areas correspond to different resonant frequencies, differentially configured connecting cavities 22 with different cross-sectional areas can also improve the vibration state at corresponding frequencies, further extending the low-frequency performance of the speaker and expanding the bandwidth.

[0057] In some embodiments, reference Figures 1 to 4The resonant structure 2 is set on one side of the housing 1. The resonant structure 2 can be a cuboid, a cube, etc. The specific shape and structure can be adjusted according to actual needs. Setting the resonant structure 2 on one side of the housing 1 only requires increasing the volume of the speaker side, making the installation and matching of the speaker and other components more flexible.

[0058] In some embodiments, refer to Figure 3 , Figure 6 The loudspeaker also includes a bracket 5, a magnetic circuit structure 3, and a vibration structure 4 mounted on the bracket 5, with the outer shell 1 connected to the bracket 5. The bracket 5 effectively supports and fixes the outer shell 1 and the magnetic circuit structure 3, making the position of the magnetic circuit structure 3 relative to the outer shell 1 more stable and preventing the vibration structure 4 from colliding with the magnetic circuit structure 3 during vibration and causing damage to the device. Specifically, the bracket 5 is connected to the yoke 33 of the magnetic circuit structure 3, and the bracket 5 has a through hole 51. The connecting cavity 22 and the cavity are connected through the through hole 51, and the cross-sectional area of ​​the through hole 51 is smaller than that of the resonant cavity 21. That is to say, the through hole 51 can also be regarded as part of the neck of the Helmholtz resonant cavity. Depending on the actual needs, the through hole 51 can be a straight through hole or a tortuous through hole to avoid its thickness being too thin at the connection between the outer shell 1 and the yoke 33, which would affect stability. In some embodiments, such as Figure 3 , Figure 6 As shown, a channel formed by connecting cavity 22 and through hole 51 is formed between resonant cavity 21 and cavity. At this time, connecting cavity 22 and through hole 51 together act as neck to adjust the resonant frequency, so as to extend the low frequency performance of speaker.

[0059] Reference Figure 3 , Figure 6 The magnetic circuit structure 3 includes a magnetically conductive plate 31, a central magnet 32, and a yoke 33 stacked sequentially from top to bottom. A magnetic gap is formed between the yoke 33, the central magnet 32, and the magnetically conductive plate 31. The central magnet 32 ​​provides the magnetic field, and the yoke 33 provides support. Working in conjunction with the magnetically conductive plate 31, the magnetic field of the central magnet 32 ​​forms a closed or nearly closed loop, effectively concentrating the magnetic flux generated by the central magnet 32 ​​into the magnetic gap. The magnetic gap is annularly formed outside the magnetically conductive plate 31 and the central magnet 32. When the voice coil 44 is energized, it vibrates within the magnetic gap, causing the diaphragm 41 to vibrate and produce sound. The yoke 33 is connected to the support 5, and the outer shell 1 is connected to the yoke 33 via the support 5. Depending on the actual situation, the support 5 can have a certain rigidity to support the connection between the outer shell 1 and the yoke 33, thus forming a stable structure within the cavity.

[0060] Reference Figure 3 , Figure 6The vibrating structure 4 includes a diaphragm 41, a surround 42, a voice coil support 43, and a voice coil 44. The surround 42 is connected to the edge of the diaphragm 41, and the outer side of the surround 42 is connected to the inner wall of the housing 1 and the support 5. The voice coil support 43 is connected to the diaphragm 41, and its bottom end extends into the magnetic gap. The voice coil 44 is located within the magnetic gap and connected to the outer side of the voice coil support 43. Specifically, to protect the diaphragm 41, it is usually placed deep within the housing 1, so that even when the diaphragm 41 vibrates to its maximum outward movement, it is still protected by the housing 1. Depending on the actual situation, the top of the housing 1 may also protrude to form a ring-shaped or intermittently spaced first protective edge to further reduce the influence of the external environment on the diaphragm 41. The diaphragm 41 can be formed as a planar plate structure or as a structure that protrudes outward. The edge of the diaphragm 41 and the surround 42 can be bonded together. To increase the strength of the connection, the edge of the diaphragm 41 is usually extended further into the surround 42 to obtain a larger contact area. Correspondingly, the edge of the surround 42 that connects to the diaphragm 41 can also extend towards the diaphragm 41, further increasing the contact area. The surround 42 has greater elasticity and is arranged around the diaphragm 41, allowing the diaphragm 41 to vibrate vertically up and down to produce sound, reducing energy loss and improving sound quality.

[0061] Reference Figure 3 , Figure 6 The folded ring 42 is also bonded to the inner wall of the outer shell 1. To enhance the connection strength, a portion of the folded ring 42 extends along the inner wall of the outer shell 1 to obtain a larger contact area. Depending on the actual situation, a connecting groove can be formed in the portion of the inner wall of the outer shell 1 that contacts the folded ring 42 to accommodate the extended portion of the folded ring 42, ensuring that after bonding, the inner surface of the folded ring 42 is flush with the inner wall of the outer shell 1 outside the connecting groove. In other words, the connection between the folded ring 42 and the outer shell 1 does not protrude from the inner wall of the outer shell 1, but forms a flat structure, reducing the impact of vibration within the cavity on the connection between the folded ring 42 and the outer shell 1. In some embodiments, the portion of the inner wall of the outer shell 1 located at the upper part of the folded ring 42 can also protrude towards the center to form a second protective edge, allowing all or at least a portion of the folded ring 42 to be covered by the second protective edge. This prevents the folded ring 42 from being affected by external factors during deformation and also limits the deformation limit of the folded ring 42, preventing it from deforming beyond its recovery capacity.

[0062] Reference Figure 3 , Figure 6 The voice coil support 43 is connected to the inner side of the diaphragm 41. Depending on the actual situation, to strengthen the connection, the top of the voice coil support 43 can extend along the shape of the inner side of the diaphragm 41 to obtain a larger contact area. The voice coil 44 is located on the outer side of the bottom end of the voice coil support 43 and extends into the magnetic gap, so that it is at the position of maximum magnetic flux during vibration. Depending on the actual situation, the voice coil 44 can also be located inside the voice coil support 43, or multiple voice coils 44 can be used to obtain better vibration effects.

[0063] In some embodiments, refer to Figure 1 To protect the diaphragm 41, a protective frame 6 connected to the outer shell 1 is usually installed on the outside of the diaphragm 41 to block external impacts. Depending on the actual situation, the protective frame 6 can be made of a rigid material to increase strength and formed as a hollow support structure to avoid affecting the sound quality.

[0064] Based on this, this utility model embodiment also provides a sound-generating device. The sound-generating device includes a loudspeaker and a mounting bracket, with the mounting bracket connected to the exterior of the loudspeaker's housing 1. Using the loudspeaker as described above as the sound-generating structure, the mounting bracket provides support and allows the loudspeaker to be installed more easily in the desired position. Specifically, the mounting bracket can be connected to the loudspeaker using various methods such as snap-fit, bolt connection, or adhesive bonding to achieve better fixation.

[0065] This application provides a loudspeaker and a sound-generating device. The loudspeaker includes a housing, a magnetic circuit structure, a vibration structure, and a resonant structure. A connecting cavity is formed on the housing, and a flow-resistance component is disposed within the connecting cavity. The magnetic circuit structure and the vibration structure are installed inside the housing, forming a cavity with the housing. The resonant structure is connected to the outside of the housing, and a resonant cavity is formed inside it, communicating with the cavity. By setting up the resonant structure and utilizing the connecting cavity to connect the resonant cavity with the cavity, and by placing a flow-resistance component within the resonant cavity, low-frequency extension is optimized, bandwidth is expanded, and a better auditory effect is achieved.

[0066] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A loudspeaker, characterized in that, The loudspeaker includes: The outer casing has a connecting cavity, and a flow resistance assembly is provided inside the connecting cavity; A magnetic circuit structure and a vibration structure are installed inside the housing, and a cavity is formed between the magnetic circuit structure, the vibration structure, and the housing; A resonant structure is connected to the outside of the outer shell, and a resonant cavity is provided inside the resonant structure. The resonant cavity is connected to the cavity through the connecting cavity.

2. The loudspeaker according to claim 1, characterized in that, The flow resistance assembly includes multiple protrusions, which are symmetrically arranged on the inner wall of the connecting cavity along its length.

3. The loudspeaker according to claim 2, characterized in that, The flow resistance component is a combination of multiple toothed protrusions or multiple semi-cylindrical protrusions.

4. The loudspeaker according to claim 1, characterized in that, It also includes a support, on which the magnetic circuit structure and vibration structure are mounted. The support is connected to the outer shell, and a through hole is provided on the support. The connecting cavity and the cavity are connected through the through hole.

5. The loudspeaker according to claim 1, characterized in that, The resonant structure is ring-shaped and surrounds the outer side of the outer shell.

6. The loudspeaker according to claim 1, characterized in that, The resonant structure is disposed on one side of the outer shell.

7. The loudspeaker according to claim 1, characterized in that, The inner cross-section of the resonant cavity is rectangular or elliptical.

8. The loudspeaker according to claim 4, characterized in that, The magnetic circuit structure includes a magnetic guide plate, a central magnet, and a yoke stacked from top to bottom. A magnetic gap is formed between the yoke, the central magnet, and the magnetic guide plate. The yoke is connected to the support.

9. The loudspeaker according to claim 8, characterized in that, The vibrating structure includes a diaphragm, a surround, a voice coil support, and a voice coil. The diaphragm is connected to the edge of the surround, and the outer side of the surround is connected to the inner wall of the housing and the support. The voice coil support is connected to the diaphragm, and the bottom end of the voice coil support extends into the magnetic gap. The voice coil is located in the magnetic gap and is connected to the outer side of the voice coil support.

10. A sound-generating device, characterized in that, The sound-generating device includes: The loudspeaker as described in any one of claims 1-9; Mounting bracket, attached to the exterior of the speaker housing.

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