Low-frequency unit filtering structure of multi-unit combined earphone

Abstract

The utility model discloses a low-frequency unit filtering structure of a multi-unit combined earphone, which comprises a shell, a plane diaphragm unit, a first sound transmission conduit and a second sound transmission conduit, a sound cavity is arranged in the shell, the plane diaphragm unit is arranged in the sound cavity and divides the sound cavity into a front sound cavity and a rear sound cavity, the rear sound cavity is provided with an air hole, and the first sound transmission conduit is communicated with the second sound transmission conduit. The front sound cavity is connected to the earphone sound outlet through a first sound transmission conduit, and the rear sound cavity is connected with the first sound transmission conduit through a second sound transmission conduit. According to the utility model, through mutual cooperation of the housing, the plane diaphragm unit, the first sound transmission conduit, the second sound transmission conduit, the air hole and the earphone sound outlet, not only can smooth and continuous frequency response curves and phase curves of the low-frequency unit and the intermediate-frequency unit be realized, but also the fidelity of sound can be improved. In addition, damping nets are arranged at the two ends of the first sound transmission conduit and one end of the second sound transmission conduit, so that the sound effects of different frequency bands can be optimized.

Description

TECHNICAL FIELD

[0001] The utility model relates to audio frequency technical field more particularly, it is a kind of low-frequency unit filter structure of multi-unit combination earphone. BACKGROUND

[0002] Multi-unit combination earphone refers to the earphone made by one or several combinations of commonly known as ring iron, ring static iron or static iron.This kind of earphone usually adopts frequency dividing circuit to cut off the middle-high frequency part of low-frequency unit, adjusts the parameter of frequency dividing circuit, so that the frequency response curve and phase curve of low-frequency unit and middle-frequency unit are smoothly continuous. SUMMARY

[0003] The utility model aims at overcoming the insufficient of prior art, provide a kind of low-frequency unit filter structure of multi-unit combination earphone.

[0004] To achieve the above object, the utility model adopts the following technical scheme:

[0005] The utility model provides a kind of low-frequency unit filter structure of multi-unit combination earphone, including shell, plane diaphragm unit, first sound guide pipe and second sound guide pipe, the sound cavity is equipped in the shell, the plane diaphragm unit is installed in the sound cavity, and the sound cavity is divided into front sound cavity and rear sound cavity, the rear sound cavity is equipped with air hole, to make the rear sound cavity with the outside communication of shell, the front sound cavity is connected to earphone sound outlet by first sound guide pipe, the rear sound cavity is connected with the first sound guide pipe by the second sound guide pipe.

[0006] Further, the both ends of the first sound guide pipe and the one end of the second sound guide pipe connected with the rear sound cavity are equipped with damping net.

[0007] Further, one end of the second sound guide pipe is communicated with the intermediate position of the first sound guide pipe.

[0008] Further, the shell, the first sound guide pipe, the second sound guide pipe, the air hole and the earphone sound outlet all adopt the connection mode of integral forming.

[0009] Further, the plane diaphragm unit is ring form magnet structure or array type magnet structure.

[0010] Further, the plane diaphragm unit includes plane diaphragm with built-in plane voice coil and annular magnet, the annular magnet is arranged in parallel with the plane diaphragm.

[0011] Further, the annular magnet includes upper annular magnet and lower annular magnet, and the plane diaphragm is arranged between the upper annular magnet and the lower annular magnet.

[0012] Further, the planar diaphragm unit comprises a planar diaphragm with etched circuitry, and a plurality of planar array magnet groups formed by a single magnet array distribution, which are arranged in parallel with the planar diaphragm.

[0013] Further, the planar array magnet group comprises an upper planar array magnet group and a lower planar array magnet group, and the planar diaphragm is arranged between the upper planar array magnet group and the lower planar array magnet group.

[0014] The utility model discloses a low frequency unit filter structure of multi-unit combined earphone compared with prior art has the advantages of: a low frequency unit filter structure of multi-unit combined earphone, including shell, planar diaphragm unit, first sound guide pipe and second sound guide pipe, be equipped with acoustic cavity in the shell, planar diaphragm unit is installed in acoustic cavity, and acoustic cavity is divided into front acoustic cavity and rear acoustic cavity, and the rear acoustic cavity is equipped with the air hole, to make the rear acoustic cavity with the outside communication of shell, and the front acoustic cavity is connected to earphone sound outlet through first sound guide pipe, and the rear acoustic cavity is connected with first sound guide pipe through second sound guide pipe.

[0015] The above description is only a summary of the technical scheme of the utility model, in order to can more clearly understand the technical means of the utility model, can be implemented according to the content of specification, and in order to let the above and other purposes and advantages of the utility model can be more obvious and easy to understand, the following preferred embodiments are described in detail as follows. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the utility model embodiment, the following will be needed to use the drawings in the embodiment description briefly introduced, obviously, the following description in the drawings is some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, can also obtain other drawings according to these drawings.

[0017] Figure 1 Part of the simplified schematic diagram of the low frequency unit filter structure of multi-unit combined earphone for the specific embodiment of the utility model is provided;

[0018] Figure 2Part structure diagram of low frequency unit filter structure of multi-unit combined earphone provided by the embodiment of the utility model,

[0019] Figure 3 Structure diagram of another planar diaphragm unit in the low frequency unit filter structure of multi-unit combined earphone provided by the embodiment of the utility model,

[0020] Figure 4 Structure diagram of another planar diaphragm unit in the low frequency unit filter structure of multi-unit combined earphone provided by the embodiment of the utility model,

[0021] Reference signs

[0022] 1, shell; 11, rear sound cavity; 111, air hole; 12, front sound cavity;

[0023] 2, planar diaphragm unit; 21, planar diaphragm; 211, planar voice coil; 22, upper annular magnet; 221, upper annular inner magnet; 222, upper annular outer magnet; 23, lower annular magnet; 231, lower annular inner magnet; 232, lower annular outer magnet;

[0024] 2A, planar diaphragm unit; 21A, planar diaphragm; 22A, upper planar array magnet group; 23A, lower planar array magnet group;

[0025] 3, first sound guide pipe;

[0026] 4, second sound guide pipe;

[0027] 5, damping net. DETAILED DESCRIPTION

[0028] The technical scheme of the utility model will be described clearly and completely in combination with the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, instead of all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0029] It should be understood that when used in the description and claims, the terms "include" and "contain" indicate the existence of the described features, whole, step, operation, element and / or component, but do not exclude the existence or addition of one or more other features, whole, step, operation, element, component and / or set thereof.

[0030] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0031] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0032] like Figures 1-2 As shown, this utility model embodiment provides a low-frequency unit filtering structure for a multi-unit combined earphone, including a housing 1, a planar diaphragm unit, a first sound passage duct 3, and a second sound passage duct 4. The housing 1 has a sound cavity, the planar diaphragm unit is disposed in the sound cavity, and the sound cavity is divided into a front sound cavity 12 and a rear sound cavity 11. The rear sound cavity 11 has a vent hole 111 to allow the rear sound cavity 11 to communicate with the outside of the housing 1. The front sound cavity 12 is connected to the earphone outlet through the first sound passage duct 3, and the rear sound cavity 11 is connected to the first sound passage duct 3 through the second sound passage duct 4.

[0033] This invention, through the coordinated operation of the housing 1, planar diaphragm unit, first acoustic duct 3, second acoustic duct 4, vent 111, and headphone outlet, combined with a crossover circuit, achieves the separation and optimization of low and mid-high frequencies. By adjusting physical parameters such as the size of the acoustic cavity, the shape and length of the acoustic duct, and the air permeability of the damping mesh, as well as the electrical parameters of the crossover circuit, it not only achieves smooth and continuous frequency response and phase curves for the low-frequency and mid-frequency units, but also improves sound fidelity by matching the target frequency response curve through scientific acoustic tuning design. Furthermore, damping meshes are installed at both ends of the first acoustic duct and one end of the second acoustic duct to optimize the sound effects of different frequency bands. Furthermore, by designing the first acoustic duct 3 and the second acoustic duct 4 separately, the parameters of each duct (the first acoustic duct 3 and the second acoustic duct 4) can be modified according to the needs of different in-ear headphones. This further enables precise adjustment of the frequency response of the planar diaphragm unit when used for low frequencies, providing greater flexibility and more choices when designing multi-unit in-ear headphones, and achieving acoustic performance far exceeding that of similar products.

[0034] Both ends of the first sound conduit 3 and the end of the second sound conduit 4 connected to the rear sound cavity 11 are equipped with damping meshes 5.

[0035] The damping net 5 arranged at various positions can not only play a dustproof role, but more importantly, a damping role. Different density and mesh size of the filter screen can also adjust the damping and filter high frequency, and further adjust the overall listening experience by using high frequency changes. The damping net 5 can be made of compressed cotton, non-woven fabric or mesh fabric.

[0036] The shapes of the first sound guide pipe 3 and the second sound guide pipe 4 can be designed according to acoustic requirements, and specific paths, pipe diameters and lengths. In the embodiment, the first sound guide pipe 3 and the second sound guide pipe 4 are both curved, which has the advantage that the pipe diameters and lengths required by specific acoustic requirements can be met in a limited earphone shell space, so that the target frequency response curve is achieved.

[0037] In an embodiment, one end of the second sound guide pipe 4 is in communication with the middle position of the first sound guide pipe 3. The advantage is that the low frequency sensitivity of the planar diaphragm unit can be achieved by adjusting the middle position or adjusting the inner diameter and length of the second sound guide pipe 4.

[0038] In an embodiment, the shell 1, the first sound guide pipe 3, the second sound guide pipe 4, the air hole 111 and the earphone sound outlet are all connected in an integral molding manner. This integral molding usually adopts a 3D printing method to meet the appearance requirements of the ear shell design and the acoustic requirements of the specific shape sound guide pipe. At the same time, 3D printing can also reduce the manufacturing difficulty and production and assembly cost.

[0039] In an embodiment, the planar diaphragm unit is a ring-shaped magnet structure or an arrayed magnet structure. It should be noted that the diaphragm in the ring-shaped magnet structure or the arrayed magnet structure is a planar diaphragm.

[0040] The diameter of the planar diaphragm unit ranges from 5mm to 20mm. Controlling the diameter of the planar diaphragm unit in this range can provide a wider frequency response range, lower distortion and better sound field performance. In addition, compared with the traditional moving coil magnetic unit, the planar diaphragm unit has a lighter and thinner diaphragm structure, which enables it to respond to audio signals faster and provide more accurate and clear sound quality.

[0041] As shown in Figure 3 The planar diaphragm unit 2 includes a planar diaphragm 21 with an embedded planar voice coil 211 and a ring-shaped magnet arranged in parallel with the planar diaphragm 21. It should be noted that a single-layer ring-shaped magnet or a double-layer ring-shaped magnet can be designed for the planar diaphragm 21, wherein the single-layer ring-shaped magnet refers to one layer of ring-shaped magnet arranged on the upper side or the lower side of the planar diaphragm 21, and the double-layer ring-shaped magnet refers to one layer of ring-shaped magnet arranged on the upper side and the lower side of the planar diaphragm 21.

[0042] As shown in Figure 3As shown, the annular magnet includes an upper annular magnet 22 and a lower annular magnet 23, and the planar diaphragm 21 is arranged between the upper annular magnet 22 and the lower annular magnet 23. The upper annular magnet 22 includes an upper annular inner magnet 221 and an upper annular outer magnet 222, and the upper annular inner magnet 221 is located in the inner circle of the upper annular outer magnet 222. The lower annular magnet 23 includes a lower annular inner magnet 231 and a lower annular outer magnet 232, and the lower annular inner magnet 231 is located in the inner circle of the lower annular outer magnet 232.

[0043] As shown in the figure, Figure 4 The planar diaphragm unit 2A includes a planar diaphragm 21A with etched circuits and a plurality of planar array magnet groups formed by single magnet array distribution, and the planar array magnet groups are arranged in parallel with the planar diaphragm 21A. It should be noted that the planar array magnet group can be designed as a single-layer planar array magnet group or a double-layer planar array magnet group, wherein the single-layer planar array magnet group refers to one layer of planar array magnet groups arranged on the upper side or the lower side of the planar diaphragm 21A, and the double-layer planar array magnet group refers to one layer of planar array magnet groups arranged on the upper side and the lower side of the planar diaphragm 21A.

[0044] As shown in the figure, Figure 4 The planar array magnet group includes an upper planar array magnet group 22A and a lower planar array magnet group 23A, and the planar diaphragm 21A is arranged between the upper planar array magnet group 22A and the lower planar array magnet group 23A, and the single magnet is in the shape of a long strip.

[0045] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A low frequency unit filter structure of a multi-unit combination earphone, characterized by, The earphone comprises a shell, a planar diaphragm unit, a first sound passage pipe and a second sound passage pipe. The shell is provided with an acoustic cavity. The planar diaphragm unit is installed in the acoustic cavity and divides the acoustic cavity into a front acoustic cavity and a rear acoustic cavity. The rear acoustic cavity is provided with a sound hole for communication between the rear acoustic cavity and the outside of the shell. The front acoustic cavity is connected to an earphone sound outlet through the first sound passage pipe. The rear acoustic cavity is connected to the first sound passage pipe through the second sound passage pipe. The planar diaphragm unit is a ring-shaped magnet structure or an arrayed magnet structure. The planar diaphragm unit comprises a planar diaphragm with a planar voice coil and a ring-shaped magnet arranged in parallel with the planar diaphragm. Alternatively, the planar diaphragm unit comprises a planar diaphragm with an etched circuit and a plurality of planar arrayed magnet groups formed by a single magnet array. The planar arrayed magnet groups are arranged in parallel with the planar diaphragm.

2. The low frequency unit filter structure of a multi-unit combination earphone according to claim 1, wherein, Both ends of the first sound passage pipe and the end of the second sound passage pipe connected to the rear acoustic cavity are provided with damping nets.

3. The low frequency unit filter structure of a multi-unit combination earphone according to claim 2, wherein, One end of the second sound passage pipe is in communication with the middle position of the first sound passage pipe.

4. The low frequency unit filter structure of a multi-unit combination earphone according to claim 1, wherein, The shell, the first sound passage pipe, the second sound passage pipe, the sound hole and the earphone sound outlet are connected in an integral molding manner.

5. The low frequency unit filter structure of a multi-unit combination earphone according to claim 1, wherein, The ring-shaped magnet comprises an upper ring-shaped magnet and a lower ring-shaped magnet. The planar diaphragm is arranged between the upper ring-shaped magnet and the lower ring-shaped magnet.

6. The low frequency unit filter structure of a multi-unit combination earphone according to claim 1, wherein, The planar arrayed magnet groups comprise an upper planar arrayed magnet group and a lower planar arrayed magnet group. The planar diaphragm is arranged between the upper planar arrayed magnet group and the lower planar arrayed magnet group.

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