Earphone front cavity frequency wave crest suppression structure and in-ear earphone

Abstract

The utility model relates to the technical field of earphones, in particular to an earphone front cavity frequency wave crest suppression structure and an in-ear earphone, which comprise an integrated shell, a cavity structure is arranged in the integrated shell, the integrated shell is provided with a sound outlet communicated with the cavity structure, and the sound outlet is communicated with the cavity structure. A front cavity is formed by the face, facing the sound outlet, of the sound production unit in the cavity structure and part of the inner wall of the cavity structure, a plurality of Helmholtz resonance structures of different sizes are integrally formed between the inner wall of the front cavity and the outer wall of the shell, and inlets of the Helmholtz resonance structures are communicated with the front cavity. According to the utility model, the plurality of integrally formed Helmholtz resonance structures are introduced between the inner wall of the front cavity and the outer wall of the shell, so that the interference of assembly connection on sound wave propagation is reduced while the specific frequency audio wave crest is inhibited and the overall sound quality performance of the earphone is remarkably improved, and the sound quality performance is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to earphone technical field, specifically, earphone front cavity frequency wave crest suppression structure and in ear earphone. BACKGROUND

[0002] In-ear earphones are extremely popular in modern portable audio devices due to their lightweight and portable characteristics. However, their design complexity is high, involving multiple core components, including sound-emitting units, earphone cavities, and other auxiliary elements. Among these components, the design of the earphone cavity, especially the front cavity, has a significant impact on sound quality, as it determines the sound wave propagation path and the final sound output frequency response characteristics.

[0003] When an in-ear earphone is worn, it forms a closed cavity in the ear canal. This closed environment can produce a large amount of sound wave reflection and resonance during audio playback, resulting in a sharp increase in the peak resonance frequency of the resonance peak. This not only makes the sound sharp and distorted, but also seriously affects the auditory comfort of the wearer.

[0004] To solve this problem, current designs usually introduce a Helmholtz resonance structure inside the earphone. This structure can effectively adjust the resonance frequency, control the propagation characteristics of sound waves, and suppress the peak value of sound waves at specific frequencies, thereby improving sound quality and enhancing the auditory experience of the wearer.

[0005] For example, the Chinese utility model with publication number CN212677367U provides a noise-reducing earphone by setting several Helmholtz resonance cavities on the feedback microphone's pickup pipeline to achieve filtering and noise reduction. Another example is the Chinese utility model with publication number CN222053334U, which provides an in-ear earphone by setting a Helmholtz channel on the loudspeaker assembly to absorb sound energy near the peak resonance frequency of the resonance peak in the ear cavity, thereby suppressing the sharp increase in the peak resonance frequency of the resonance peak, making the frequency response curve of the sound more flat, and ultimately improving the sound quality.

[0006] The above-mentioned existing technologies are all non-integral structures. However, in non-integral cavity structures, the interaction between independent components is difficult to accurately control, and the connection between components may become an obstacle to sound wave propagation. This structural defect can cause additional sound wave reflection and energy loss, thereby reducing the clarity and detail performance of sound quality and affecting the auditory experience of users. UTILITY MODEL CONTENT

[0007] The utility model discloses a purpose lies in providing a earphone front cavity frequency wave crest suppression structure and earphone that goes into ear, through introducing multiple integrated and having different size's helmholtz resonance structure between the inner wall of front cavity and the outer wall of shell, in accurate suppression specific frequency audio frequency wave crest, significantly improve earphone overall sound quality performance's while, reduced the interference of component connection to sound wave propagation, further improved the sound quality performance, to solve the problem that the background art points out.

[0008] The utility model discloses a earphone front cavity frequency wave crest suppression structure, including integral type shell, the cavity structure has in the integral type shell, be equipped with with the cavity structure intercommunication's sound outlet on the integral type shell, the sound unit of cavity structure inside one side to the sound outlet with the part inner wall of cavity structure forms the front cavity, the inner wall of front cavity with the outer wall of shell integrative has multiple helmholtz resonance structure with different size between, the inlet of helmholtz resonance structure with front cavity intercommunication.

[0009] According to a preferred embodiment, the sound unit in the cavity structure has a back cavity formed by the part of the inner wall of the cavity structure opposite to the sound outlet, and the shell has a pressure relief channel communicating the front cavity and the back cavity.

[0010] According to a preferred embodiment, the pressure relief channel is integrally formed between the inner wall of the cavity structure and the outer wall of the shell.

[0011] According to a preferred embodiment, the part of the inner wall of the cavity structure forms a ring groove, and the sound unit is arranged in the ring groove.

[0012] According to a preferred embodiment, the outlet of the pressure relief channel is arranged at the rear end surface of the ring groove.

[0013] The utility model also provides an earphone that goes into ear, including earphone front cavity frequency wave crest suppression structure as above-mentioned.

[0014] The earphone front cavity frequency wave crest suppression structure and the earphone that go into ear provided by the utility model have at least the following advantages and beneficial effects:

[0015] (1) The utility model discloses a plurality of integrated helmholtz resonance structures between the inner wall of the front cavity and the outer wall of the shell, which can effectively suppress the specific frequency audio frequency wave crest, significantly improve the overall sound quality performance of the earphone, reduce the interference of component connection to sound wave propagation, and further improve the sound quality performance.

[0016] (2) By configuring multiple independent and different size helmholtz resonance structures, different high frequency wave crests can be optimized, which can effectively avoid multi-frequency interference and ensure the accuracy and independence of frequency suppression.

[0017] (3) The overall structure adopts a passive acoustic element design, without the need for additional electronic adjusting equipment, thereby improving the reliability and durability of the structure. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A schematic diagram of the overall structure of the earphone front cavity frequency peak suppression structure provided in Embodiment 1 of the present application is shown in the figure.

[0019] Figure 2 A perspective view of the earphone front cavity frequency peak suppression structure provided in Embodiment 2 of the present application is shown in the figure.

[0020] Figure 3 A simplified schematic diagram of the earphone front cavity frequency peak suppression structure provided in Embodiment 2 of the present application is shown in the figure.

[0021] Figure 4 A schematic diagram of the first Helmholtz resonance structure provided in Embodiment 2 of the present application is shown in the figure.

[0022] Figure 5 A schematic diagram of the second Helmholtz resonance structure provided in Embodiment 2 of the present application is shown in the figure.

[0023] Figure 6 A schematic diagram of the pressure relief channel provided in Embodiment 4 of the present application is shown in the figure.

[0024] Figure 7 A schematic diagram of the internal structure of the earphone front cavity provided in Embodiment 3 of the present application is shown in the figure.

[0025] Figure 8 A schematic diagram of the structure of the in-ear earphone provided in Embodiment 5 of the present application is shown in the figure.

[0026] Reference signs: 100 - sound outlet, 200 - cavity structure, 210 - front cavity, 220 - ring groove, 230 - rear cavity, 300 - first Helmholtz resonance structure, 310 - first connecting channel, 320 - first resonance cavity, 400 - second Helmholtz resonance structure, 410 - second connecting channel, 420 - second resonance cavity, 500 - pressure relief channel, 600 - shell. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0028] Embodiment 1

[0029] The embodiment provides a headphone front cavity frequency peak suppression structure, as shown in the accompanying drawings. Figure 1 The integral shell is formed based on a 3D printing technology, so that the entire structure is integrally and seamlessly integrated, thereby improving the stability and acoustic performance of the structure.

[0030] The integral shell has a cavity structure 200 therein, the integral shell is provided with an acoustic outlet 100 in communication with the cavity structure 200, and a side of a sound emitting unit in the cavity structure 200, which faces the acoustic outlet 100, forms a front cavity 210 with part of an inner wall of the cavity structure 200, serving as a main acoustic transmission cavity, the front cavity 210 is responsible for transmitting an audio signal to an ear canal through the acoustic outlet 100, and the internal volume and shape thereof are designed according to ergonomic and acoustic optimization principles, which will not be described in detail here.

[0031] A plurality of Helmholtz resonance structures with different sizes are integrally formed between the inner wall of the front cavity 210 and the outer wall of the shell, the inlet of the Helmholtz resonance structure is in communication with the front cavity 210, and the specific number of the Helmholtz resonance structure is not limited here, and can be set according to the target number of target suppression frequencies.

[0032] It should be noted that the Helmholtz resonance structure is a high-efficiency sound energy conversion device, which is usually composed of a narrow tube and a cavity, and the Helmholtz resonance structure uses resonance to absorb sound, when sound waves enter the cavity from the narrow tube, the resonance of the cavity air is caused, and the energy conversion causes part of the sound energy to be lost in the process, thereby achieving the effect of absorbing sound of a specific frequency, and by adjusting the length and cross-sectional area of the narrow tube and the volume of the cavity, sound waves in a specific frequency range can be absorbed; it is worth mentioning that the Helmholtz resonance structures with different sizes refer to Helmholtz resonance structures with different cavity volumes and / or narrow tube lengths and / or cross-sectional areas. In summary, the plurality of integrally formed Helmholtz resonance structures introduced between the inner wall of the front cavity 210 and the outer wall of the shell can suppress the peak of a specific frequency audio, significantly improve the overall sound quality of the earphone, reduce the interference of component connection on sound wave propagation, and further improve the sound quality.

[0033] Embodiment 2

[0034] The embodiment is based on the technical solution provided in Embodiment 1, and further describes the Helmholtz resonance structure.

[0035] As a preferred solution, as shown in the accompanying drawings, Figure 2 The inner wall of the front cavity 210 and the outer wall of the shell are integrally formed with two Helmholtz resonance structures, including a first Helmholtz resonance structure 300 and a second Helmholtz resonance structure 400.

[0036] In a preferred embodiment, referring to Figure 3 As shown, the first Helmholtz resonance structure 300 and the second Helmholtz resonance structure 400 are independent of each other; referring to Figure 4 As shown, the first Helmholtz resonance structure 300 comprises a first connecting passage 310 extending along a first direction, and a first resonance cavity 320 extending along a second direction and communicating with the first connecting passage 310 through a transition passage, the second direction being perpendicular to the first direction; referring to Figure 5 As shown, the second Helmholtz resonance structure 400 comprises a second connecting passage 410 extending along the first direction, and a second resonance cavity 420 extending along a third direction and communicating with the second connecting passage 410, the third direction being the opposite direction of the second direction.

[0037] The embodiment can effectively avoid multi-frequency interference and ensure the accuracy and independence of frequency suppression by configuring multiple independent Helmholtz resonance structures with different sizes to optimize different high-frequency peaks.

[0038] Embodiment 3

[0039] The embodiment further illustrates the pressure relief design based on the technical solution provided in Embodiment 2.

[0040] Preferably, one side of the sound emitting unit in the cavity structure 200 opposite to the sound outlet 100 forms a back cavity 230 with part of the inner wall of the cavity structure 200, and the shell has a pressure relief passage 500 communicating the front cavity 210 and the back cavity 230. It should be noted that the pressure relief passage 500 balances the air pressure inside and outside the earphone to improve the wearing comfort, and adjusts the air flow to optimize the low-frequency sound quality. In a preferred embodiment, the pressure relief passage 500 is integrally formed between the inner wall of the cavity structure 200 and the outer wall of the shell, further improving the stability of the structure.

[0041] Referring to Figure 6 As shown, part of the inner wall of the cavity structure 200 forms a ring groove 220, and the sound emitting unit is arranged in the ring groove 220, wherein the outlet of the pressure relief passage 500 is arranged at the rear end surface of the ring groove 220.

[0042] Embodiment 4

[0043] The embodiment provides an in-ear earphone based on the earphone front cavity 210 frequency peak suppression structure provided in any one of Embodiments 1 to 3, referring to Figure 8 As shown, the in-ear earphone comprises the earphone front cavity frequency peak suppression structure as described in any one of Embodiments 1 to 4.

[0044] The above merely is preferred embodiment of the present utility model, and is not for limiting the present utility model, for the person skilled in the art, the present utility model can have various changes and changes. Any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A frequency peak suppression structure for the front cavity of an earphone, characterized in that, The device includes an integral housing with a cavity structure (200) inside. The integral housing has a sound outlet (100) that communicates with the cavity structure (200). The side of the sound-generating unit inside the cavity structure (200) facing the sound outlet (100) forms a front cavity (210) with part of the inner wall of the cavity structure (200). Multiple Helmholtz resonant structures of different sizes are integrally formed between the inner wall of the front cavity (210) and the outer wall of the housing. The entrance of the Helmholtz resonant structure communicates with the front cavity (210).

2. The headphone front cavity frequency peak suppression structure as described in claim 1, characterized in that, The side of the sound-generating unit in the cavity structure (200) facing away from the sound outlet (100) forms a rear cavity (230) with part of the inner wall of the cavity structure (200). The housing has a pressure relief channel (500) that connects the front cavity (210) and the rear cavity (230).

3. The headphone front cavity frequency peak suppression structure as described in claim 2, characterized in that, The pressure relief channel (500) is integrally formed between the inner wall of the cavity structure (200) and the outer wall of the shell.

4. The headphone front cavity frequency peak suppression structure as described in claim 3, characterized in that, A portion of the inner wall of the cavity structure (200) forms an annular groove (220), and the sound-generating unit is disposed within the annular groove (220).

5. The headphone front cavity frequency peak suppression structure as described in claim 4, characterized in that, The outlet of the pressure relief channel (500) is located on the rear end face of the annular groove (220).

6. An in-ear headphone, characterized in that, Includes the headphone front cavity frequency peak suppression structure as described in any one of claims 1 to 5.

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