Loudspeaker structure and head-mounted device

Abstract

The utility model discloses a loudspeaker structure and a head-mounted device, and relates to the technical field of loudspeakers, the loudspeaker structure comprises a support, a magnetic circuit system and a vibration system, the support is provided with a mounting groove; the magnetic circuit system is arranged in the mounting groove, and at least two coaxial magnetic circuit gaps are formed at intervals; the vibration system comprises a vibrating diaphragm, a dome and at least two voice coils, the outer circumferential wall of the dome is connected with the inner ring wall of the vibrating diaphragm, the outer ring wall of the vibrating diaphragm is connected with the inner circumferential wall of the mounting groove, and the vibrating diaphragm, the dome and the support define a sound cavity; one side, back on to the bottom wall of the mounting groove, of each voice coil is connected with the dome, and each voice coil is accommodated in one magnetic circuit gap.

Description

Technical Field

[0001] This utility model relates to the field of loudspeaker technology, and in particular to a loudspeaker structure and a head-mounted device. Background Technology

[0002] With technological advancements and rising consumer demands, the headphone market is experiencing rapid growth. Users not only seek clarity in sound quality but also expect headphones to provide a more powerful audio experience. However, traditional headphone designs often have inefficient magnet utilization in their vibration systems, resulting in insufficient Ampere force from the voice coil to drive the diaphragm and generate a adequate low-frequency response. This leads to lower sound pressure levels, making traditional headphones perform poorly in low-frequency sound pressure levels and sound less powerful, failing to meet consumers' demands for a high-quality audio experience. Therefore, speaker structures employing dual voice coil configurations have emerged, aiming to improve speaker performance by increasing the number of voice coils.

[0003] However, the dual voice coil speaker architecture typically involves connecting two voice coils of different sizes to a diaphragm, which is designed with a gradually expanding structure to improve low-frequency response and sound pressure level by increasing the effective area of ​​the diaphragm. However, this design has some limitations. The connection between the dual voice coils and the gradually expanding diaphragm can lead to asynchronous vibrations, resulting in reduced clarity and accuracy of the sound, affecting overall sound quality, and causing the sound to become muddy or distorted. Utility Model Content

[0004] The main objective of this invention is to propose a speaker structure and a head-mounted device that aims to improve the low-frequency performance of the speaker structure.

[0005] To achieve the above objectives, the speaker structure proposed in this utility model includes:

[0006] The bracket is provided with a mounting groove;

[0007] A magnetic circuit system, wherein the magnetic circuit system is disposed within the mounting groove and forms at least two coaxial magnetic circuit gaps at intervals; and

[0008] A vibration system comprising a diaphragm, a dome, and at least two voice coils, wherein the outer peripheral wall of the dome is connected to the inner ring wall of the diaphragm, the outer ring wall of the diaphragm is connected to the inner peripheral wall of the mounting groove, the diaphragm, the dome, and the support form a sound cavity, and each voice coil is connected to the dome on the side facing away from the bottom wall of the mounting groove, and each voice coil is accommodated within a magnetic circuit gap.

[0009] This utility model also proposes a head-mounted device, including the above-described speaker structure. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0011] Figure 1 An exploded view of a first-person perspective of an embodiment of the speaker structure provided by this utility model;

[0012] Figure 2 An exploded view of a second perspective of an embodiment of the speaker structure provided by this utility model;

[0013] Figure 3 A cross-sectional view of an embodiment of the speaker structure provided by this utility model;

[0014] Figure 4 A cross-sectional view of another embodiment of the speaker structure provided by this utility model.

[0015] Explanation of icon numbers:

[0016] 100. Speaker Structure; 1. Bracket; 11. Mounting Slot; 111. Through Hole; 112. Limiting Ring Block; 113. Vent Hole; 12. Positioning Protrusion Ring; 2. Magnetic Circuit System; 21. Magnetic Circuit Gap; 22. T-Iron; 221. Limiting Step; 222. Magnetic Yoke; 223. Magnetic Pole Post; 224. Outer Magnetic Sleeve; 225. Mounting Ring; 23. Magnet; 24. Washer; 3. Vibration System; 31. Dome; 32. Diaphragm; 33. Voice Coil; 34. Sound Chamber; 4. Tuning Grille.

[0017] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0019] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0020] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0021] This utility model proposes a loudspeaker structure 100.

[0022] Please see Figures 1 to 4 In one embodiment of the present invention, the loudspeaker structure 100 includes a bracket 1, a magnetic circuit system 2, and a vibration system 3. The bracket 1 is provided with a mounting groove 11. The magnetic circuit system 2 is disposed in the mounting groove 11 and forms at least two coaxial magnetic circuit gaps 21 at intervals. The vibration system 3 includes a diaphragm 32 and at least two voice coils 33. The outer peripheral wall of the diaphragm 32 is connected to the inner peripheral wall of the mounting groove 11 and forms a sound cavity 34 with the bracket 1. The side of each voice coil 33 facing away from the bottom wall of the mounting groove 11 is connected to the diaphragm 32. Each voice coil 33 is accommodated in one of the magnetic circuit gaps 21.

[0023] In this utility model's technical solution, when an audio signal is sent into the speaker structure 100, the magnetic circuit system 2 provides a magnetic field, and the voice coil 33 is energized. According to Faraday's law of electromagnetic induction, the voice coil 33 will generate mechanical force in the magnetic field, that is, the voice coil 33 will be subjected to Ampere force due to the current passing through it, thereby causing the voice coil 33 to move in the magnetic field, thereby driving the dome 31 and the diaphragm 32 to vibrate. The vibration of the diaphragm 32 causes the surrounding air molecules to vibrate, generating sound waves. These sound waves propagate in all directions, forming the sound that people can hear. The magnetic circuit system 2 forms two or more magnetic circuits... The path gap 21 and the vibration system 3, by incorporating two or more voice coils 33, enable the speaker structure 100 to have better driving capability, improving low-frequency response and sound pressure level. Furthermore, the configuration of three voice coils 33 provides stronger driving force because each voice coil 33 contributes additional force, thereby increasing the speaker's sound pressure level and low-frequency response. The multi-voice coil 33 design improves the speaker's frequency response, especially in the low-frequency range, providing a deeper and richer bass effect. Since multiple voice coils 33 share the vibration load, the vibration of a single voice coil 33 can also be reduced. Fatigue is reduced, thus improving the durability and lifespan of the loudspeaker; the side of the voice coil 33 facing away from the bottom wall of the mounting groove 11 is connected to the dome 31 (it can be glued or mechanically connected, this utility model does not limit this), ensuring that the connection between the voice coil 33 and the dome 31 is firm and has good guidance, which can reduce energy loss, improve transmission efficiency, and make the driving force generated by the voice coil 33 when energized better drive the dome 1 and the diaphragm 32 to vibrate, thereby improving the low-frequency performance of the loudspeaker structure 100; and the direct connection between the voice coil 33 and the dome 31 avoids the dual voice coils 33 and the progressive expansion diaphragm The connection of diaphragm 32 may cause asynchronous vibrations, thus improving the clarity and accuracy of the sound and reducing distortion; dome 31 is typically used in high-frequency loudspeakers, and dome 31 can provide a better upper limit for high-frequency reproduction; because dome 31 is usually lightweight, it can respond to the vibration of voice coil 33 more quickly, thus providing a better transient response, which is crucial for accurately reproducing the subtle differences in music; the design of dome 31 is conducive to improving the directivity of loudspeakers, meaning that the sound can be distributed more evenly over a wider range, providing a better stereo effect.

[0024] Specifically, the magnetic circuit system 2 includes a T-iron 22, a magnet 23, and a washer 24. The T-iron 22 has a yoke 222, a magnetic pole post 223, and an outer magnetic sleeve 224. The magnetic pole post 223 is connected to one side of the magnetic yoke 222, and the outer magnetic sleeve 224 is connected to the outer peripheral wall of the magnetic yoke 222, forming a mounting ring 225 with the magnetic pole post 223. The magnet 23 and the washer 24 are sequentially fitted onto the magnetic pole post 223 and located within the mounting ring 225. When two magnetic circuit gaps and two voice coils are provided, the magnetic pole post 223 is positioned between the inner ring wall of the magnet 23 and the inner ring wall of the washer 24. A magnetic circuit gap 21 is formed, and another magnetic circuit gap 21 is formed between the outer magnetic sleeve 224 and the outer ring wall of the magnet 23 and the washer 24. Each magnetic circuit gap 21 accommodates a voice coil 33. When three magnetic circuit gaps and three voice coils are provided, a magnetic circuit gap 21 is opened in the magnetic pole post 223, another magnetic circuit gap 21 is formed between the magnetic pole post 223 and the inner ring wall of the magnet 23 and the washer 24, and yet another magnetic circuit gap 21 is formed between the outer magnetic sleeve 224 and the outer ring wall of the magnet 23 and the washer 24. Each magnetic circuit gap 21 accommodates a voice coil 33.

[0025] Please see Figure 3 and Figure 4 In one embodiment of this utility model, the surface of the dome 31 facing the voice coil 33 is a plane. The dome 31 is typically made of lightweight yet rigid materials, such as polypropylene or silk, to ensure good acoustic performance. The side of the dome 31 facing the voice coil 33 is designed as a flat surface, making the connection between the dome 31 and the voice coil 33 more stable and consistent, which helps improve the efficiency of vibration transmission. The flat sidewall design simplifies the connection between the dome 31 and the voice coil 33, allowing the voice coil 33 to be fixed to the flat sidewall of the dome 31 by adhesive or other fixing methods. The flat sidewall provides a stable and consistent contact surface, helping the voice coil 33 to transmit vibrations to the dome 31 more effectively, thereby improving acoustic efficiency. Due to the more stable connection, vibration distortion caused by unstable connection can be reduced, providing clearer and more accurate sound reproduction. The flat sidewall provides a wide support surface, which helps improve the structural stability of the connection between the dome 31 and the voice coil 33, reducing the risk of damage caused by long-term vibration. In addition, the flat sidewall of the dome 31 can provide a large heat dissipation area to help dissipate heat from the voice coil 33, thereby improving the durability and reliability of the loudspeaker.

[0026] In one embodiment of this invention, the dome 31 is made of polyester film. Polyester film has low production costs, making it a popular choice for mass production and economical loudspeakers. It is also easy to process and mold, allowing it to be made into various shapes and sizes suitable for different loudspeaker designs. Polyester film still possesses good physical properties, such as moderate rigidity and light weight, which makes it perform well in high-frequency applications. Furthermore, polyester film has good heat resistance and chemical resistance, which helps improve the durability and lifespan of the loudspeaker.

[0027] Specifically, please refer to Figure 1 and Figure 4 In one embodiment of this utility model, the magnetic circuit system 2 includes a T-iron 22, a magnet 23, and a washer 24. The T-iron 22 has a magnetic yoke 222, a magnetic pole post 223, and an outer magnetic sleeve 224. The magnetic pole post 223 is connected to one side of the magnetic yoke 222. The outer magnetic sleeve 224 is connected to the outer peripheral wall of the magnetic yoke 222 and forms a mounting ring 225 with the magnetic pole post 223. The magnet 23 and the washer 24 are sequentially sleeved on the magnetic pole post 223 and located within the mounting ring 225. The magnetic pole post 223 has a magnetic circuit gap 21. Another magnetic circuit gap 21 is formed between the magnetic pole post 223 and the inner ring wall of the magnet 23 and the washer 24. A third magnetic circuit gap 21 is formed between the outer magnetic sleeve 224 and the outer ring wall of the magnet 23 and the washer 24. By setting three magnetic circuit gaps 21, the distribution of the magnetic field can be controlled more precisely, making the magnetic field more concentrated and uniform, thereby improving the efficiency and performance of the speaker. The design of the three magnetic circuit gaps 21 helps to reduce magnetic resistance and increase the permeability of the magnetic circuit system 2, so that the magnetic field is transmitted to the voice coil 33 and diaphragm 32 more efficiently. The optimized magnetic field distribution can improve the sound pressure level and frequency response of the speaker, thereby improving the low-frequency sound quality.

[0028] To effectively utilize the space of the bracket 1 and optimize the volume of the speaker structure 100, please refer to... Figure 3 and Figure 4In one embodiment of this utility model, the bracket 1 has a through hole 111 penetrating the bottom wall of the mounting groove 11, and the magnetic circuit system 2 is disposed within the through hole 111. By embedding the magnetic circuit system 2 within the through hole 111, the thickness of the speaker structure 100 can be reduced, achieving a flattened design for the speaker structure 100 and a thinner, lighter design for the electronic device. Furthermore, the flattened design of the speaker structure 100 allows for the placement of multiple voice coils 33 and magnetic circuit gaps 21, thereby giving the speaker structure 100 better driving capability and further improving low-frequency response and sound pressure level. By precisely controlling the size and position of the magnetic circuit system 2, the overall volume of the bracket 1 can be optimized, making the speaker structure 100 more compact. The flattened design allows for increasing the area of ​​the acoustic cavity 34 while maintaining the compactness of the speaker structure 100, which helps improve low-frequency response and sound pressure level. The magnetic circuit system 2 being embedded within the through hole 111 allows for more efficient use of space, leaving more room for other components or making the entire device thinner and lighter.

[0029] Please see Figure 1 and Figure 2 In one embodiment of this utility model, a limiting step 221 is formed on the side of the magnetic circuit system 2 facing the diaphragm 32, and a limiting ring block 112 is formed on the inner peripheral wall of the through hole 111. The limiting step 221 is connected to the limiting ring block 112. Specifically, the outer peripheral wall of the outer magnetic sleeve 224 of the T-iron 22 has a limiting step 221. The limiting step 221 and the limiting ring block 112 are connected to each other in some way (such as snap-fit, adhesive or mechanical locking). The cooperation of the limiting step 221 and the limiting ring block 112 provides a precise positioning mechanism to ensure the correct position of the magnetic circuit system 2 in the through hole 111, thereby optimizing the magnetic field distribution. This connection method improves the structural stability of the magnetic circuit system 2, reduces displacement caused by vibration or external force, and helps maintain the consistency of speaker performance. The cooperation of the limiting step 221 and the limiting ring block 112 simplifies the assembly process of the magnetic circuit system 2, making production more efficient.

[0030] Please see Figure 1 and Figure 2In one embodiment of this utility model, the bracket 1 has multiple vent holes 113 penetrating the bottom wall of the mounting groove 11. The size and number of vent holes 113 can be adjusted to control the airflow between the sound cavity 34 and the external environment. By precisely controlling the airflow, the acoustic characteristics of the sound cavity 34 can be optimized. By increasing the number or size of the vent holes 113, the volume of the sound cavity 34 can be expanded, providing a larger vibration space for the diaphragm 32, which helps the diaphragm 32 vibrate more freely, thereby improving the low-frequency response. When the diaphragm 32 vibrates, it causes pressure waves in the surrounding air, forming sound waves. A larger vibration cavity means that the diaphragm 32 can drive more air molecules to vibrate, thereby producing richer low-frequency sounds.

[0031] Further, please refer to Figure 1 and Figure 2 In one embodiment of this utility model, the speaker structure 100 further includes a tuning mesh 4, which is disposed on the side of the support 1 facing away from the diaphragm 32 and covers a plurality of the ventilation holes 113. By changing the aperture of the tuning mesh 4, the air permeability of the acoustic cavity 34 can be finely adjusted, thereby affecting the low-frequency response and sound pressure level of the speaker. The tuning mesh 4 allows the air permeability to be adjusted as needed, optimizing the speaker's response within a specific frequency range and improving sound quality. The tuning mesh 4 can reduce airflow noise at the ventilation holes 113, improving the clarity and accuracy of the sound. Appropriate air permeability helps reduce air pressure changes inside the acoustic cavity 34, thereby reducing sound distortion and improving sound clarity. The tuning mesh 4 also provides an additional protective layer to prevent dust and other small particles from entering the speaker, extending the speaker's service life.

[0032] For easy installation of TuningNet 4, please refer to [link / reference]. Figure 1 and Figure 2 In one embodiment of this utility model, a positioning protrusion 12 is formed on the side of the bracket 1 facing away from the diaphragm 32, and the tuning mesh 4 is sleeved on the positioning protrusion 12. The positioning protrusion 12 provides a clear installation reference point to ensure the precise positioning of the tuning mesh 4 in the speaker structure 100. The tuning mesh 4 is stably fixed by being sleeved on the positioning protrusion 12, reducing displacement or deformation caused by vibration or other external forces. The setting of the positioning protrusion 12 simplifies the installation process of the tuning mesh 4; it is only necessary to sleeve the tuning mesh 4 on the positioning protrusion 12, without the need for additional fixing devices.

[0033] This utility model also proposes a head-mounted device, which includes the speaker structure 100 described in any of the above embodiments. The specific structure of the speaker structure 100 is as described in the above embodiments. Since this head-mounted device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. The head-mounted device can be a headphone or a fully open-back wearable headphone, and this utility model does not limit it in this regard.

[0034] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A loudspeaker structure, characterized in that, include: The bracket is provided with a mounting groove; A magnetic circuit system is disposed within the mounting groove and forms at least two coaxial magnetic circuit gaps at intervals. as well as A vibration system comprising a diaphragm, a dome, and at least two voice coils, wherein the outer peripheral wall of the dome is connected to the inner ring wall of the diaphragm, the outer ring wall of the diaphragm is connected to the inner peripheral wall of the mounting groove, the diaphragm, the dome, and the support form a sound cavity, and each voice coil is connected to the dome on the side facing away from the bottom wall of the mounting groove, and each voice coil is accommodated within a magnetic circuit gap.

2. The loudspeaker structure as described in claim 1, characterized in that, The surface of the dome facing the voice coil is a plane.

3. The loudspeaker structure as described in claim 1, characterized in that, The dome is made of polyester film.

4. The loudspeaker structure as described in claim 1, characterized in that, The magnetic circuit system includes a T-iron, a magnet, and a washer. The T-iron has a yoke, a magnetic pole post, and an outer magnetic sleeve. The magnetic pole post is connected to one side of the magnetic yoke. The outer magnetic sleeve is connected to the outer peripheral wall of the magnetic yoke and forms a mounting ring with the magnetic pole post. The magnet and the washer are sequentially sleeved on the magnetic pole post and located inside the mounting ring. The magnetic pole post has one magnetic circuit gap, and another magnetic circuit gap is formed between the magnetic pole post and the inner ring wall of the magnet and the washer. The outer magnetic sleeve has yet another magnetic circuit gap between it and the outer ring wall of the magnet and the washer.

5. The loudspeaker structure as described in any one of claims 1 to 4, characterized in that, The bracket has a through hole that penetrates the bottom wall of the mounting groove, and the magnetic circuit system is located in the through hole.

6. The loudspeaker structure as described in claim 5, characterized in that, The magnetic circuit system forms a limiting step on the side facing the diaphragm, and a limiting ring block is formed on the inner peripheral wall of the through hole. The limiting step is connected to the limiting ring block.

7. The loudspeaker structure as described in any one of claims 1 to 4, characterized in that, The bracket has multiple ventilation holes that penetrate the bottom wall of the mounting groove.

8. The loudspeaker structure as described in claim 7, characterized in that, The speaker structure also includes a tuning mesh, which is located on the side of the bracket facing away from the diaphragm and covers a plurality of the ventilation holes.

9. The loudspeaker structure as described in claim 8, characterized in that, The bracket has a positioning protrusion on the side facing away from the diaphragm, and the tuning mesh is fitted onto the positioning protrusion.

10. A head-mounted device, characterized in that, Includes the speaker structure as described in any one of claims 1 to 9.

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