Loudspeaker and electronic product

Abstract

The invention belongs to the technical field of electronic products, and discloses a loudspeaker and an electronic product. The loudspeaker comprises a shell and a loudspeaker single body, an accommodating cavity is arranged in the shell, and the shell is provided with a sound outlet; the loudspeaker monomer comprises a loudspeaker body and a vibrating diaphragm, the vibrating diaphragm divides the accommodating cavity into a front cavity and a rear cavity, the loudspeaker body is arranged in the rear cavity, the front cavity is communicated with the sound outlet, a resonant cavity is arranged in the front cavity, the resonant cavity extends along the circumferential direction of the front cavity, and the resonant cavity is communicated with the front cavity. The loudspeaker is compact in structure and reasonable in layout, cavity peaks or pipeline peaks can be suppressed, the low-frequency performance of the loudspeaker is ensured, the problem of insufficient low-frequency sensitivity of the loudspeaker is avoided, a sound curve is smoother, and the sound quality is improved.

Description

Technical Field

[0001] This invention relates to the field of electronic product technology, and more particularly to a loudspeaker and electronic product. Background Technology

[0002] In recent years, with the rapid development of mobile communication technology, consumers are increasingly using mobile communication devices with voice capabilities, such as mobile phones, tablets, and laptops. As the voice playback device, the design of the speaker directly affects the voice performance of mobile communication devices. To meet market demands for slimness and high sound quality, higher requirements have been placed on speaker enclosure design.

[0003] In existing technology, in order to suppress cavity peaks or channel peaks, loudspeakers will add an HHR (Helmholtz Resonance) cavity. However, the design of the HHR cavity requires a certain length of channel to connect to a relatively large cavity, which will occupy part of the space of the rear cavity of the loudspeaker, resulting in insufficient rear cavity volume and insufficient low frequency sensitivity. Summary of the Invention

[0004] The purpose of this invention is to provide a loudspeaker and electronic product that can suppress cavity peaks or channel peaks, ensure the low-frequency performance of the loudspeaker, make the sound curve smoother, improve sound quality, and have a compact structure and reasonable layout, thus achieving miniaturization of the loudspeaker.

[0005] To achieve this objective, the present invention adopts the following technical solution: A loudspeaker, comprising: The outer casing has a receiving cavity inside and a sound outlet. A loudspeaker unit includes a loudspeaker body and a diaphragm. The diaphragm divides the receiving cavity into a front cavity and a rear cavity. The loudspeaker body is disposed in the rear cavity. The front cavity is connected to the sound outlet. A resonant cavity is disposed in the front cavity. The resonant cavity extends circumferentially along the front cavity and is connected to the front cavity.

[0006] Preferably, the inner wall of the housing is provided with an annular vertical wall facing the speaker unit, and the bottom end of the vertical wall is provided with a first support portion to support the speaker body, and the side of the diaphragm is connected to the first support portion.

[0007] Preferably, the front cavity is provided with a tube wall, one side of which is connected to a vertical wall, and the other side of which extends away from the diaphragm and abuts against and seals against the inner wall of the outer shell. The outer shell, the vertical wall, and the tube wall form the resonant cavity.

[0008] Preferably, the pipe wall and the vertical wall are integrally formed.

[0009] Preferably, the outer shell includes an upper shell and a cover plate. The upper shell has a through hole, and a second support portion is provided on the inner periphery of the through hole. The cover plate is disposed on the second support portion, and one side of the tube wall abuts and seals against the cover plate. The resonant cavity is formed between the cover plate, the vertical wall, and the tube wall.

[0010] Preferably, the tube wall and the vertical wall are designed separately, with one side of the tube wall connected to the first support portion, the tube wall sandwiched between the speaker body and the first support portion, and the diaphragm sandwiched between the tube wall and the speaker body.

[0011] Preferably, there are multiple resonant cavities, with one end of each resonant cavity connected to the front cavity and the other end blocked.

[0012] Preferably, at least two of the plurality of resonant cavities have different lengths.

[0013] Preferably, the front cavity is provided with a first cavity and a second cavity, and one end of the first cavity is provided with a first opening to form a first resonant cavity, one end of the second cavity is provided with a second opening, and a baffle is provided in the second cavity, and a second resonant cavity is formed between the second opening of the second cavity and the baffle.

[0014] Preferably, the second cavity has a third opening on the side of the baffle away from the second opening, so as to form a third resonant cavity on the side of the baffle of the second cavity away from the second resonant cavity.

[0015] Preferably, the resonant cavity avoids the connection between the front cavity and the sound outlet.

[0016] Preferably, the housing includes an upper shell and a lower shell, with the speaker unit fixedly disposed on the upper shell and the lower shell fastened to the upper shell.

[0017] Preferably, the resonant cavity is a Fabry-Perot cavity.

[0018] An electronic product including the aforementioned speaker.

[0019] The beneficial effects of this invention are: This invention provides a loudspeaker and an electronic product. In this loudspeaker, the diaphragm of the loudspeaker unit divides the housing cavity into a front cavity and a rear cavity, and a resonant cavity is disposed in the front cavity. One end of the resonant cavity is connected to the front cavity, and the resonant cavity extends circumferentially along the front cavity. When sound waves enter the resonant cavity, the resonant cavity will resonate with sound waves of a specific frequency depending on the length of the resonant cavity. By adjusting the length of the resonant cavity, cavity peaks or channel peaks can be suppressed. Since the resonant cavity is disposed in the front cavity of the loudspeaker, it avoids affecting the volume of the rear cavity. The structure is compact and the layout is reasonable, ensuring the low-frequency performance of the loudspeaker, avoiding the problem of insufficient low-frequency sensitivity, making the sound curve smoother, and improving the sound quality. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the loudspeaker provided in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the upper shell structure provided in Embodiment 1 of the present invention; Figure 3 This is an exploded view of the loudspeaker provided in Embodiment 1 of the present invention; Figure 4 This is a cross-sectional view of the loudspeaker provided in Embodiment 1 of the present invention; Figure 5 yes Figure 4 A magnified view of a section at point A in the middle; Figure 6 This is a schematic diagram of the upper shell structure provided in Embodiment 2 of the present invention; Figure 7 This is an exploded view of the upper shell provided in Embodiment 2 of the present invention; Figure 8 This is a cross-sectional view of the loudspeaker provided in Embodiment 2 of the present invention; Figure 9 yes Figure 8 A magnified view of a section at point B in the middle.

[0021] In the picture: 1. Outer shell; 11. Sound outlet; 12. First resonant cavity; 121. First opening; 13. Second resonant cavity; 131. Second opening; 132. Baffle; 14. Third resonant cavity; 141. Third opening; 15. Upper shell; 151. Through hole; 152. Front cavity; 153. Rear cavity; 154. First support part; 155. Second support part; 156. Tube wall; 16. Lower shell; 17. Vertical wall; 18. Cover plate; 2. Speaker driver; 21. Speaker body; 22. Diaphragm; 3. Resonance cavity. Detailed Implementation

[0022] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0023] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0026] This invention provides an electronic product comprising a housing and a speaker disposed within the housing, which, when in use, can play sound through the speaker. In this embodiment, the electronic product may be one of a mobile phone, tablet computer, or laptop computer. As a voice playback device, the design of the speaker directly affects the voice performance of mobile communication devices. To meet market demands for thinness and high sound quality, higher requirements are placed on the design of speaker enclosures.

[0027] In existing technology, in order to suppress cavity peaks or channel peaks, loudspeakers will add an HHR (Helmholtz Resonance) cavity. However, the design of the HHR cavity requires a certain length of channel to connect to a relatively large cavity, which will occupy part of the space of the rear cavity of the loudspeaker, resulting in insufficient rear cavity volume and insufficient low frequency sensitivity.

[0028] like Figures 1-4As shown, to solve the above problems, the loudspeaker provided in this embodiment includes a housing 1 and a loudspeaker unit 2. The housing 1 is provided with a receiving cavity and a sound outlet 11. The loudspeaker unit 2 includes a loudspeaker body 21 and a diaphragm 22. The diaphragm 22 divides the receiving cavity into a front cavity 152 and a rear cavity 153. The loudspeaker body 21 is disposed in the rear cavity 153. The front cavity 152 is connected to the sound outlet 11. A resonant cavity 3 is disposed in the front cavity 152. The resonant cavity 3 extends circumferentially along the front cavity 152 and is connected to the front cavity 152.

[0029] In this loudspeaker, the diaphragm 22 of the loudspeaker unit 2 divides the receiving cavity inside the housing 1 into a front cavity 152 and a rear cavity 153. A resonant cavity 3 is set in the front cavity 152. When sound waves enter the resonant cavity 3, the resonant cavity 3 will resonate with sound waves of a specific frequency depending on the length of the resonant cavity 3. By adjusting the length of the resonant cavity 3, cavity peaks or channel peaks can be suppressed. Since the resonant cavity 3 is set in the front cavity 152 of the loudspeaker, it avoids affecting the volume of the rear cavity 153, ensuring the low-frequency performance of the loudspeaker, avoiding the problem of insufficient low-frequency sensitivity of the loudspeaker, making the sound curve smoother and improving the sound quality.

[0030] In this embodiment, the resonant cavity 3 is a Fabry-Perot cavity, which consists of two parallel acoustic reflecting surfaces filled with air or other media. When a sound wave enters the cavity, it reflects back and forth between the two reflecting surfaces, generating multiple reflected and transmitted waves. When the path difference of the sound wave during one round trip within the cavity satisfies the constructive interference condition, a standing wave resonance will form within the cavity at a specific frequency. At this point, the transmitted sound intensity at that frequency reaches its maximum value, improving sound quality. Frequencies that do not meet the condition are suppressed due to destructive interference, resulting in a smoother sound profile.

[0031] The resonant frequency of the Fabry-Perot cavity is fn = (2n-1)c / 4L, where n=1 is the fundamental frequency, c is the speed of sound, and L is the effective length of the duct. In other words, under certain external conditions, the resonant frequency of the Fabry-Perot cavity is related to L. Designers can design the length of the Fabry-Perot cavity as needed to filter out the target frequency sound waves and suppress noise of other frequencies.

[0032] like Figure 4 and Figure 5As shown, the inner wall of the outer casing 1 has an annular vertical wall 17 facing the speaker unit 2. A first support portion 154 supporting the speaker body 21 is provided at the bottom end of the vertical wall 17, and the side of the diaphragm 22 is connected to the first support portion 154. The vertical wall 17 can position the speaker unit 2 during installation. During assembly, when the operator inserts the speaker unit 2 into the outer casing 1, the vertical wall 17 ensures the accuracy of the speaker unit 2's installation position, while the first support portion 154 provides a reference for the installation depth of the speaker unit 2, greatly simplifying the operator's installation of the speaker unit 2.

[0033] In some embodiments, the entire speaker unit 2 can be suspended in the rear cavity 153 by means of the first support 154.

[0034] Preferably, the front cavity 152 is provided with a tube wall 156, one side of which is connected to the vertical wall 17, and the other side of which faces away from the diaphragm 22 and abuts and seals against the inner wall of the outer shell 1. The outer shell 1, the vertical wall 17, and the tube wall 156 enclose a resonant cavity 3. The formation of the resonant cavity 3 utilizes the existing vertical wall 17 and inner wall of the outer shell 1, requiring only the tube wall 156, which greatly simplifies the structure and reduces the volume occupied by the resonant cavity 3 in the front cavity 152. Moreover, since the vertical wall 17 is annular, the inner wall of the outer shell 1 can cover the area of ​​the vertical wall 17, so the length of the resonant cavity 3 is determined by the circumferential extension length of the tube wall 156 within the front cavity 152.

[0035] In some embodiments, the pipe wall 156 and the vertical wall 17 are integrally formed. That is, the pipe wall 156 and the vertical wall 17 are integrally formed, fixedly connected and non-removable, which further simplifies the molding process, reduces the structure for fixing the pipe wall 156 and the vertical wall 17, and lowers the cost.

[0036] In some embodiments, the outer shell 1 includes an upper shell 15 and a cover plate 18. The upper shell 15 has a through hole 151, and a second support portion 155 is provided on the inner periphery of the through hole 151. The cover plate 18 is disposed on the second support portion 155. One side of the tube wall 156 abuts and seals against the cover plate 18. A resonant cavity 3 is formed between the cover plate 18, the vertical wall 17, and the tube wall 156. Since the tube wall 156 and the vertical wall 17 are integrally formed, the through hole 151 is opened on the outer shell 1, and the through hole 151 is sealed by the cover plate 18. This not only ensures the airtightness of the outer shell 1, thereby ensuring acoustic performance, but also seals the groove formed by the tube wall 156 and the vertical wall 17 by the cover plate 18 to form the resonant cavity 3. When dust or debris is present in the resonant cavity 3 and affects the sound quality, the dust or debris in the resonant cavity 3 can be cleaned by removing the cover plate 18.

[0037] In some embodiments, multiple resonant cavities 3 are provided, with one end of each resonant cavity 3 connected to the front cavity 152 and the other end blocked. That is, each resonant cavity 3 can resonate with sound waves of a specific frequency. The combined action of multiple resonant cavities 3 can selectively enhance sound waves of multiple frequencies, as well as selectively enhance sound waves of the same frequency, thereby improving sound quality.

[0038] In some embodiments, at least two of the multiple resonant cavities 3 have different lengths. This structure allows the loudspeaker to amplify sound waves at least two frequencies, widening the effective frequency response range. The shorter cavity corresponds to high-frequency resonance, enhancing the radiation efficiency of high frequencies and preventing excessive attenuation of high-frequency signals. The longer cavity corresponds to mid-low frequency resonance, compensating for the loudspeaker's response shortcomings in the mid-low frequency region and improving the fullness of bass. The combination of multiple cavity lengths can cover the entire operating frequency range of the loudspeaker, resulting in more uniform sound pressure output across high, mid, and low frequencies, achieving balanced sound across the entire frequency range.

[0039] like Figure 2 and Figure 3 As shown, a first cavity and a second cavity are mirror-arranged inside the front cavity 152. A first opening 121 is provided at one end of the first cavity to form a first resonant cavity 12. A second opening 131 is provided at one end of the second cavity. A baffle 132 is provided inside the second cavity. A second resonant cavity 13 is formed between the second opening 131 of the second cavity and the baffle 132.

[0040] The front cavity 152 has a mirror image of the first cavity and the second cavity, making the layout of the front cavity 152 mirror symmetrical. This facilitates design and molding, ensures a more uniform acoustic impedance distribution of the cavities, reduces sound wave reflection loss at the interface, and improves sound quality. The baffle 132 in the second cavity can be designed with specific positions as needed, thereby adjusting the length of the second resonant cavity 13.

[0041] In some embodiments, the second cavity has a third opening 141 on the side of the baffle 132 opposite to the second opening 131, so as to form a third resonant cavity 14 on the side of the baffle 132 of the second cavity opposite to the second resonant cavity 13. This structure can utilize the remaining length of the second cavity to set up a third resonant cavity, that is, to set up a third resonant cavity 14 on the opposite side of the second resonant cavity 13, further widening the effective frequency response range of the loudspeaker, so that the loudspeaker can amplify sound waves of three frequencies, and further improve the sound quality.

[0042] It is worth noting that, in order to ensure the balance of the sound output from the speaker, the connection point between the sound outlet 11 and the front cavity 152 is located on the center line of the speaker. That is to say, the center line of the connection point between the sound outlet 11 and the front cavity 152 coincides with the center line of the speaker, and the first cavity and the second cavity are symmetrical about the center line of the speaker.

[0043] The resonant cavity 3 avoids the connection point between the front cavity 152 and the sound outlet 11. The resonant cavity 3 surrounds the front cavity 152 and extends circumferentially, but the resonant cavity 3 needs to avoid the connection point between the front cavity 152 and the sound outlet 11 to ensure that the resonant cavity 3 does not affect the sound transmission through the sound outlet 11. Specifically, the end of the first resonant cavity 12 extends to one side of the connection point between the front cavity 152 and the sound outlet 11, and the end of the third resonant cavity 14 extends to the other side of the connection point between the front cavity 152 and the sound outlet 11.

[0044] like Figure 3 and Figure 4 As shown, to facilitate the installation of the speaker unit 2 inside the housing 1, the housing 1 includes an upper housing 15 and a lower housing 16. The speaker unit 2 is fixedly disposed on the upper housing 15, and the lower housing 16 is fastened to the upper housing 15. After the speaker unit 2 is disposed on the upper housing 15, the speaker assembly is completed by fastening the lower housing 16 to the upper housing 15. The lower housing 16 can seal the space inside the upper housing 15 and form a rear cavity 153 inside the upper housing 15, which can both protect the internal structure of the speaker and improve the sound quality.

[0045] In some embodiments, the pipe wall 156 and the vertical wall 17 are designed as separate units, such as... Figures 6-9 As shown, one side of the tube wall 156 is connected to the first support part 154. The tube wall 156 is sandwiched between the speaker body 21 and the first support part 154, and the diaphragm 22 is sandwiched between the tube wall 156 and the speaker body 21. By designing the tube wall 156 and the vertical wall 17 as separate parts, the upper shell 15 does not need to be provided with the through hole 151, so that the upper shell 15 has a higher integrity. The closed front cavity 152 can also ensure the stability of the sound, and the structure has high strength and extended service life.

[0046] It is worth noting that the resonant cavity 3 is formed by using a detachable tube wall 156. By increasing or decreasing the length of the tube wall 156, the length, opening position, and opening size of the corresponding resonant cavity 3 can be adjusted. The upper shell 15 is provided with a sealing wall. The setting of the sealing wall can determine the length of the resonant cavity 3, thereby strengthening sound waves of multiple frequencies and widening the effective frequency response range.

[0047] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A loudspeaker, characterized in that, include: The outer casing has a receiving cavity inside and a sound outlet. A loudspeaker unit includes a loudspeaker body and a diaphragm. The diaphragm divides the receiving cavity into a front cavity and a rear cavity. The loudspeaker body is disposed in the rear cavity. The front cavity is connected to the sound outlet. A resonant cavity is disposed in the front cavity. The resonant cavity extends circumferentially along the front cavity and is connected to the front cavity.

2. The loudspeaker according to claim 1, characterized in that, The inner wall of the housing is provided with an annular vertical wall facing the speaker unit, and a first support portion supporting the speaker body is provided at the bottom end of the vertical wall. The side of the diaphragm is connected to the first support portion.

3. The loudspeaker according to claim 2, characterized in that, The front cavity is provided with a tube wall, one side of which is connected to a vertical wall, and the other side of which extends away from the diaphragm and abuts against and seals against the inner wall of the outer shell. The outer shell, the vertical wall and the tube wall form the resonant cavity.

4. The loudspeaker according to claim 3, characterized in that, The pipe wall and the vertical wall are integrally formed.

5. The loudspeaker according to claim 3, characterized in that, The outer shell includes an upper shell and a cover plate. The upper shell has a through hole, and a second support portion is provided on the inner periphery of the through hole. The cover plate is disposed on the second support portion. One side of the tube wall abuts and seals against the cover plate. The resonant cavity is formed between the cover plate, the vertical wall, and the tube wall.

6. The loudspeaker according to claim 3, characterized in that, The tube wall and the vertical wall are designed separately. One side of the tube wall is connected to the first support part. The tube wall is sandwiched between the speaker body and the first support part. The diaphragm is sandwiched between the tube wall and the speaker body.

7. The loudspeaker according to claim 1, characterized in that, There are multiple resonant cavities, one end of each resonant cavity is connected to the front cavity, and the other end is blocked.

8. The loudspeaker according to claim 7, characterized in that, Of the plurality of resonant cavities, at least two of the resonant cavities have different lengths.

9. The loudspeaker according to claim 1, characterized in that, The front cavity is mirror-imagely provided with a first cavity and a second cavity, and a first opening is provided at one end of the first cavity to form a first resonant cavity, a second opening is provided at one end of the second cavity, and a baffle is provided inside the second cavity, and a second resonant cavity is formed between the second opening of the second cavity and the baffle.

10. The loudspeaker according to claim 9, characterized in that, The second cavity has a third opening on the side of the baffle away from the second opening, so as to form a third resonant cavity on the side of the baffle of the second cavity away from the second resonant cavity.

11. The loudspeaker according to claim 1, characterized in that, The resonant cavity avoids the connection between the front cavity and the sound outlet.

12. The loudspeaker according to claim 1, characterized in that, The outer casing includes an upper casing and a lower casing. The speaker unit is fixedly disposed on the upper casing, and the lower casing is fastened to the upper casing.

13. The loudspeaker according to any one of claims 1-12, characterized in that, The resonant cavity is a Fabry-Perot cavity.

14. An electronic product, characterized in that, The loudspeaker includes any one of claims 1 to 9.

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