Coil iron structure for true wireless stereo headphone

Abstract

The utility model provides a coil iron structure for a true wireless stereo headphone, which belongs to the technical field of headphone coil iron, aims to improve the high-frequency extension performance of the headphone and obtain higher sound pressure level, and comprises a headphone front cavity, a moving iron unit, a moving coil unit and a headphone rear cavity, the moving iron unit and the moving coil unit are vertically stacked in the earphone front cavity; the earphone front cavity and the earphone rear cavity are buckled together; the earphone front cavity is provided with a conduit, and the distance difference between the sound production position of the moving iron unit and the sound production position of the moving coil unit and the orifice of the conduit is smaller than a preset distance threshold. The utility model has the advantages of high cost performance, high-frequency response and better performance in the aspect of high-sampling-rate signal reduction capability.

Description

Technical Field

[0001] The utility model belongs to the technical field of earphone hybrid dynamic and balanced armature, and particularly relates to a dynamic and balanced armature structure for true wireless stereo earphones. Background Art

[0002] Hybrid dynamic and balanced armature earphones usually generate audio by equipping two types of drive units inside one earphone, so that each unit can specifically process a specific frequency range.

[0003] The design of hybrid dynamic and balanced armature earphones compensates for the deficiencies of a single drive unit in sound quality to a certain extent, enabling users to experience the details and dynamic range of audio more deeply. However, this combination is relatively rare in true wireless stereo (TWS) earphones, mainly due to its high manufacturing cost, as well as factors such as the small internal space and insufficient driving force of TWS earphones. Because the design of TWS earphones is restricted by the small internal space, the duct design of traditional multi-unit earphones cannot be adopted. At the same time, this space limitation also further reduces the overall capacity of the battery used, affecting the output power, and thus unable to fully meet the driving requirements of multi-unit earphones. At the same time, most of the current TWS earphone balanced armature units have a closed design with only one sound outlet, which makes their performance in high-frequency response and high-frequency extension less than satisfactory, and the insufficient driving force may also lead to a relatively small loudness.

[0004] Therefore, it is urgent to improve such earphones to enhance the high-frequency extension performance of the earphones and obtain a larger sound pressure level. Content of the Utility Model

[0005] In view of the technical problems in the background art, the utility model provides a dynamic and balanced armature structure for true wireless stereo earphones, which can enhance the high-frequency extension performance of the earphones and obtain a larger sound pressure level.

[0006] To achieve the above object, the technical solution provided by the utility model is as follows:

[0007] A dynamic and balanced armature structure for true wireless stereo earphones includes an earphone front cavity, a balanced armature unit, a dynamic unit, and an earphone rear cavity;

[0008] The balanced armature unit and the dynamic unit are vertically stacked in the earphone front cavity; the earphone front cavity and the earphone rear cavity are buckled together;

[0009] A duct is provided on the earphone front cavity, and the distances from the sound-emitting positions of the balanced armature unit and the dynamic unit to the orifice of the duct are less than a distance threshold.

[0010] Preferably, the balanced armature unit is placed in the inner clamping position of the earphone front cavity, and the balanced armature unit covers the non-sound-emitting part of the dynamic unit.

[0011] Preferably, the moving iron unit has a cuboid block structure, and a moving iron diaphragm is arranged on the cuboid block structure.

[0012] Preferably, the moving iron diaphragm of the moving iron unit is made of a lithium magnesium alloy diaphragm.

[0013] Preferably, the moving coil unit has a disc-shaped structure with a thickness of 13 mm.

[0014] Preferably, the diaphragm of the moving coil unit is made of a ceramic composite diaphragm.

[0015] Preferably, a moving iron card slot is arranged in the front cavity of the earphone, and the moving iron unit is fixed to the front cavity of the earphone through the moving iron card slot.

[0016] Preferably, the front cavity of the earphone and the rear cavity of the earphone are snap-fitted together through snap-fit buttons.

[0017] Preferably, the distance threshold is 4.25 mm.

[0018] The utility model has the following advantages and beneficial effects:

[0019] The utility model adopts a vertical stacking method, and skillfully arranges a complete set of moving coil and moving iron combined sound generating structure in the limited space of the front cavity of the earphone, which helps to eliminate the phase difference;

[0020] By optimizing the design of the moving iron unit, the utility model successfully solves the problems of narrow frequency band and poor high-frequency response of the traditional moving iron unit;

[0021] The utility model abandons the ducts and damping components used in the traditional moving coil and moving iron structure, which not only ensures the integrity of the acoustic structure in the front cavity of the moving coil unit, avoids interference, but also further reduces the overall cost;

[0022] The utility model has a relatively low cost while showing a higher performance level in the ability to restore high sampling rate signals, and has a very high cost performance. Description of the Drawings

[0023] Figure 1 is an exploded structural schematic diagram of a true wireless stereo earphone provided by an embodiment of the utility model;

[0024] Figure 2 is an assembled structural schematic diagram in the front cavity of a true wireless stereo earphone provided by an embodiment of the utility model;

[0025] Figure 3 is a structural schematic diagram of a moving iron unit provided by an embodiment of the utility model;

[0026] Icons: 101 - Front cavity of the earphone, 102 - Moving coil unit, 103 - Balanced armature unit, 104 - Rear cavity of the earphone, 105 - Duct, 301 - Balanced armature diaphragm. Detailed implementation manners

[0027] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model.

[0028] Therefore, the detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0029] Embodiment 1

[0030] A hybrid structure for true wireless stereo earphones, refer to Figure 1 - Refer to Figure 2 , comprising a front cavity 101 of the earphone, a balanced armature unit 103, a moving coil unit 102 and a rear cavity 104 of the earphone;

[0031] The balanced armature unit 103 and the moving coil unit 102 are vertically stacked in the front cavity 101 of the earphone; the front cavity 101 of the earphone and the rear cavity 104 of the earphone are snapped together;

[0032] A duct 105 is provided on the front cavity 101 of the earphone, and the distances from the sound-emitting positions of the balanced armature unit 103 and the moving coil unit 102 to the orifice of the duct 105 are less than a distance threshold, aiming to eliminate the phase difference.

[0033] In this embodiment, a vertical stacking method is adopted, and a complete set of hybrid sound-emitting structures are cleverly arranged in the limited space of the front cavity 101 of the earphone. At the same time, it is ensured that the distances from the sound-emitting positions of the balanced armature unit 103 and the moving coil unit 102 to the orifice of the duct 105 are basically the same, completely eliminating the phase difference. Compared with other hybrid true wireless stereo earphone solutions on the market, this solution shows higher performance levels in both cost and high sampling rate signal restoration capabilities.

[0034] Embodiment 2

[0035] Based on the technical solution of Embodiment 1, this embodiment further describes each structure such as the balanced armature unit 103 and the moving coil unit 102.

[0036] In this embodiment, the moving iron unit 103 is disposed at the inner clamping position of the front cavity 101 of the earphone, and the moving iron unit 103 covers the non-sounding part of the moving coil unit 102.

[0037] As a preferred solution, referring to Figure 3 , the moving iron unit 103 is a cuboid block structure, and a moving iron diaphragm 301 is provided on the cuboid block structure.

[0038] Furthermore, the moving iron diaphragm 301 of the moving iron unit 103 adopts a lithium-magnesium alloy diaphragm.

[0039] An innovative ductless 105 open moving iron unit 103 adopted in this embodiment abandons the traditional duct 105 and damping components, thereby reducing space occupancy and cost. In addition, the moving iron unit 103 adopts a lithium-magnesium alloy diaphragm as the moving iron diaphragm 301, which makes its overall Q value lower, the high-frequency response smoother, and at the same time the high-frequency extension performance is also improved. The open design also allows the moving iron diaphragm 301 to vibrate more freely, thus maximizing the retention of the dynamic range and also obtaining a larger maximum sound pressure level.

[0040] In summary, through the optimization of the design of the moving iron unit 103, the embodiment successfully solves the problems of narrow frequency band and poor high-frequency response of the traditional moving iron unit 103, enabling the true wireless stereo earphone adopting this hybrid structure to display the dynamic range of high-sampling-rate signals.

[0041] As a preferred solution of this embodiment, the moving coil unit 102 is a disc-shaped structure with a thickness of 13 mm.

[0042] Furthermore, the diaphragm of the moving coil unit 102 adopts a ceramic composite diaphragm.

[0043] In addition, a moving iron clamping position is provided in the front cavity 101 of the earphone, and the moving iron unit 103 is fixed to the front cavity 101 of the earphone through the moving iron clamping position.

[0044] On the other hand, the front cavity 101 of the earphone and the rear cavity 104 of the earphone are snap-fitted together.

[0045] In this embodiment, the moving coil unit 102 and the balanced armature unit 103 of the specific ceramic composite diaphragm with a thickness of 13 mm are vertically stacked inside the front cavity 101 of the earphone. Among them, the balanced armature unit 103 is firmly placed in the inner clamping position of the front cavity 101 of the earphone, covering the non-sounding part of the moving coil unit 102 stacked together in the front cavity 101 of the earphone. This design effectively reduces the space required for the components, thereby achieving precise control of the overall volume of the earphone. In addition, this design ensures that the sounding positions of the moving coil unit 102 and the balanced armature unit 103 are basically the same distance from the mouth of the duct 105, fundamentally eliminating the phase difference. The distance threshold set here is preferably 4.25 mm.

[0046] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A hybrid structure for true wireless stereo headphones, characterized in that : It includes a front earphone cavity (101), a balanced armature unit (103), a dynamic coil unit (102), and a rear earphone cavity (104); The balanced armature unit (103) and the dynamic coil unit (102) are vertically stacked inside the front earphone cavity (101); the front earphone cavity (101) and the rear earphone cavity (104) are snapped together; A duct (105) is provided on the front earphone cavity (101), and the distances from the sound-emitting positions of the balanced armature unit (103) and the dynamic coil unit (102) to the orifice of the duct (105) are less than a distance threshold.

2. The hybrid structure for a true wireless stereo headphone according to claim 1, wherein: The balanced armature unit (103) is placed in the inner clamping position of the front earphone cavity (101), and the balanced armature unit (103) covers the non-sound-emitting part of the dynamic coil unit (102).

3. The hybrid structure for true wireless stereo headphones according to claim 1, wherein: The balanced armature unit (103) is a cuboid block structure, and a balanced armature diaphragm (301) is provided on the cuboid block structure.

4. The hybrid structure for true wireless stereo headphones according to claim 3, wherein: The balanced armature diaphragm (301) of the balanced armature unit (103) uses a lithium-magnesium alloy diaphragm.

5. The hybrid structure for true wireless stereo headphones according to claim 1, characterized in that: The dynamic coil unit (102) is a disc-shaped structure with a thickness of 13 mm.

6. The hybrid structure for a true wireless stereo headphone according to claim 5, wherein: The diaphragm of the dynamic coil unit (102) uses a ceramic composite diaphragm.

7. The hybrid structure for true wireless stereo headphones according to claim 1, wherein: A balanced armature clamping position is provided inside the front earphone cavity (101), and the balanced armature unit (103) is fixed to the front earphone cavity (101) through the balanced armature clamping position.

8. The hybrid structure for a true wireless stereo headphone according to claim 6, wherein: The front earphone cavity (101) and the rear earphone cavity (104) are snapped together through snap fasteners.

9. The hybrid structure for true wireless stereo earphones according to claim 1, wherein: The distance threshold is 4.25 mm.

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