Moving coil unit basin stand structure

Abstract

The utility model relates to the technical field of audio equipment, in particular to a moving coil unit basin stand structure, which mainly comprises an upper magnetic conductive piece, a magnetic circuit and a lower magnetic conductive piece, a high-leakage basin stand is arranged outside the upper magnetic conductive piece, a vibrating diaphragm covers the upper parts of the upper magnetic conductive piece and the high-leakage basin stand, and the lower magnetic conductive piece is arranged on the lower magnetic conductive piece. Through the optimization design, on one hand, the magnetic field density and the magnetic field intensity at the magnetic gap are remarkably improved, the transduction efficiency of the miniature loudspeaker is improved, on the other hand, after finite element simulation, the structure effectively prevents the problem that air flow of the rear cavity is limited due to the low leakage rate, and meanwhile the reflection phenomenon of sound waves in the rear cavity is reduced. Compared with the prior art, superposition or offset caused by reflection of a specific sound wave frequency band is avoided, the smoothness and accuracy of the tone quality are remarkably improved through the improvements, and the overall tone quality and performance of the loudspeaker are remarkably improved on the premise that the structure is simplified and the cost is controllable through the design of the basin frame of the moving coil unit.

Description

Technical Field

[0001] This utility model relates to the field of audio equipment technology, and more specifically, to a dynamic driver unit frame structure. Background Technology

[0002] Traditional magnetic circuit designs typically employ simplified core layouts, leading to insufficient optimization of the magnetic flux path and consequently, uneven magnetic field distribution. This uneven magnetic field distribution limits the improvement of the transduction efficiency of the moving coil unit, impacting overall performance. Furthermore, to reduce production costs, moving coil units often utilize low-cost magnetic materials and simplified manufacturing processes. This choice not only weakens the stability of the magnetic circuit and the magnetic field strength but also reduces the product's durability and consistency to some extent, affecting its reliability during long-term use.

[0003] Secondly, existing dynamic driver basket designs generally suffer from low leakage rates. Low leakage restricts airflow in the rear cavity, increasing sound wave reflection. This reflection causes sound to return to the diaphragm, canceling out some frequency bands and resulting in more pronounced resonance peaks in certain frequency ranges. This phenomenon makes the sound overly prominent in specific frequency bands, weakening the smoothness and accuracy of the sound quality. Therefore, although low-leakage basket designs offer advantages in terms of structural simplification and cost control, the resulting resonance enhancement and distortion problems are significant, severely impacting the speaker's sound quality and overall performance. Utility Model Content

[0004] The purpose of this invention is to provide a dynamic coil unit frame structure to solve the problems of insufficient transduction efficiency in the magnetic circuit design and low leakage rate in the frame design in the prior art.

[0005] This utility model is achieved through the following technical solution:

[0006] A dynamic driver frame structure includes an upper magnetic conductor, a magnetic circuit, and a lower magnetic conductor. The magnetic circuit is disposed between the upper and lower magnetic conductors. A high-leakage frame is disposed outside the upper magnetic conductor. The high-leakage frame has a plurality of protrusions inside, which are arranged around the high-leakage frame. An opening penetrating the high-leakage frame is formed between adjacent protrusions. A diaphragm is covered on the upper magnetic conductor and the upper part of the high-leakage frame. The upper magnetic conductor is connected to the diaphragm through a voice coil, and the high-leakage frame is connected to the diaphragm through a diaphragm support.

[0007] Preferably, the upper magnetic conductor includes an upper inner magnetic conductor and an upper outer magnetic conductor, wherein the upper inner magnetic conductor is located inside the upper outer magnetic conductor and is coaxially arranged.

[0008] Preferably, the magnetic circuit includes an outer magnet and an inner magnet, wherein the inner magnet is located inside the outer magnet and is coaxially arranged.

[0009] Preferably, one bottom end of the diaphragm is located between the outer magnet and the inner magnet.

[0010] Preferably, the bottom of the upper inner magnetic conductor is 4.2 mm long, the top is 3.2 mm long, the height is 1 mm, the arc length is 1.57 mm, and the arc radius is 1 mm.

[0011] Preferably, the bottom of the upper outer magnetic conductor is 2 mm long, the top is 1.5 mm long, the inner height is 1 mm, the arc length is 0.79 mm, the arc radius is 0.5 mm, and the arc bottom height is 0.5 mm.

[0012] Preferably, the inner magnet has a bottom length of 4.2 mm, a top length of 4.2 mm, and a height of 2 mm, and the outer magnet has a bottom length of 2 mm, a top length of 2 mm, and a height of 2 mm.

[0013] Preferably, the lower magnetic conductor is a semi-circular arc. The bottom of the lower magnetic conductor is 5.2 mm long, the top is 6.7 mm long, the inner arc is 0.79 mm long, the bottom arc is 0.5 mm high, the arc radius is 0.5 mm, the outer arc is 1.57 mm long, and the arc radius is 1 mm.

[0014] Preferably, the effective open area of ​​the opening is greater than 30% of the diaphragm vibration area.

[0015] The technical solution of this utility model embodiment has at least the following advantages and beneficial effects:

[0016] The structure provided by this invention mainly includes an upper magnetic conductor, a magnetic circuit, and a lower magnetic conductor. A high-leakage frame is provided on the outside of the upper magnetic conductor, and a diaphragm is covered on the upper part of the upper magnetic conductor and the high-leakage frame. Through the above-mentioned optimized design, after finite element simulation, this structure effectively prevents the problem of restricted airflow in the rear cavity caused by low leakage rate, while reducing the reflection of sound waves in the rear cavity. It avoids the superposition or cancellation phenomenon caused by reflection in specific sound wave frequency bands. These improvements significantly enhance the smoothness and accuracy of sound quality. At the same time, the frame design of the dynamic unit significantly improves the overall sound quality and performance of the speaker while maintaining structural simplification and cost control. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1This is a cross-sectional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 3 This is an exploded view of the present invention;

[0021] Figure 4 This is a schematic diagram of the surface magnetic flux density mode of the structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the linear structure of the magnetic flux density mode of this utility model.

[0023] Figure 6 This is a schematic diagram of the high-leakage basin frame of this utility model.

[0024] Icons: 1-High leakage basket, 2-Diaphragm support, 3-Diaphragm, 4-Upper outer magnetic conductor, 5-Voice coil, 6-Upper inner magnetic conductor, 7-Inner magnet, 8-Lower magnetic conductor, 9-Outer magnet, 10-Upper magnetic conductor, 11-Magnetic circuit. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Please refer to Figures 1-6 This utility model provides a moving coil unit frame structure, including an upper magnetic conductor 10, a magnetic circuit 11, and a lower magnetic conductor 8. The magnetic circuit 11 is disposed between the upper magnetic conductor 10 and the lower magnetic conductor 8. A high-leakage frame 1 is disposed outside the upper magnetic conductor 10. The interior of the high-leakage frame 1 has a stepped structure, with the internal space decreasing from top to bottom. Spaces of different sizes are separated by annular platforms. Several protrusions are disposed inside the high-leakage frame 1, and the protrusions are arranged in a circle around the high-leakage frame 1. An opening is provided between adjacent protrusions to penetrate the high-leakage frame 1. A circular structure is provided at the connection point with the upper magnetic conductor 10, the magnetic circuit 11, and the lower magnetic conductor 8, and the upper magnetic conductor 10, the magnetic circuit 11, and the lower magnetic conductor 8 are disposed inside the circular structure.

[0027] A diaphragm 3 is provided on the upper part of the upper magnetic conductor 10 and the high leakage frame 1. The upper magnetic conductor 10 is connected to the diaphragm 3 through the voice coil 5, and the high leakage frame 1 is connected to the diaphragm 3 through the diaphragm support 2.

[0028] Specifically, the diaphragm 3 is a circular structure with an inwardly concave edge. Near the center of the circle is a protruding spherical mechanism. At the bottom end of the diaphragm 3, that is, the edge of the spherical shape, it is located between the outer magnet 9 and the inner magnet 7.

[0029] Through the aforementioned structure, the magnetic field density and strength in the speaker's magnetic gap region are significantly improved, thereby maximizing the speaker's energy conversion efficiency and achieving higher sensitivity, a wider dynamic range, and lower distortion. Simultaneously, the position and area of ​​the rear opening were precisely optimized using finite element simulation, effectively avoiding the problem of restricted airflow in the rear cavity due to excessively low leakage rate and reducing sound wave reflection. These optimizations ensure smooth sound transmission and prevent excessive emphasis on specific frequency bands, thus significantly improving the smoothness and accuracy of sound quality. Furthermore, the dynamic driver's basket design, while maintaining structural simplicity and cost control, significantly improves the speaker's sound quality and overall performance.

[0030] In one exemplary embodiment of this utility model, the upper magnetic conductor 10 includes an upper inner magnetic conductor 6 and an upper outer magnetic conductor 4. The upper inner magnetic conductor 6 is located inside the upper outer magnetic conductor 4 and is coaxially arranged.

[0031] Specifically, the bottom of the upper inner magnetic conductor 6 is 4.2 mm long, the top is 3.2 mm long, the height is 1 mm, the arc length is 1.57 mm, and the arc radius is 1 mm. The bottom of the upper outer magnetic conductor 4 is 2 mm long, the top is 1.5 mm long, the inner height is 1 mm, the arc length is 0.79 mm, the arc radius is 0.5 mm, and the arc bottom height is 0.5 mm.

[0032] In one exemplary embodiment of this utility model, the magnetic circuit 11 includes an outer magnet 9 and an inner magnet 7, wherein the inner magnet 7 is located inside the outer magnet 9 and is coaxially arranged. The bottom length of the inner magnet 7 is 4.2 mm, the top length is 4.2 mm, and the height is 2 mm. The bottom length of the outer magnet 9 is 2 mm, the top length is 2 mm, and the height is 2 mm.

[0033] In one exemplary embodiment of this utility model, the lower magnetic conductor 8 is shaped like a semi-circular arc. The bottom of the lower magnetic conductor 8 has a length of 5.2 mm, a top length of 6.7 mm, an inner arc length of 0.79 mm, an arc bottom height of 0.5 mm, an arc radius of 0.5 mm, an outer arc length of 1.57 mm, and an arc radius of 1 mm.

[0034] Secondly, the optimal structure in this embodiment is that the effective open area of ​​the aperture is greater than 30% of the vibration area of ​​the diaphragm 3, thereby reducing the reflection of sound waves in the rear cavity. This avoids the superposition or cancellation phenomenon caused by reflection in specific sound wave frequency bands, significantly improving the smoothness and accuracy of sound quality.

[0035] Specifically, in this embodiment, "large effective open area" refers to the coverage area of ​​the opening.

[0036] Through the above-described optimized design, the magnetic field density and strength at the magnetic gap are significantly improved. This optimization process maximizes the transduction efficiency of the miniature loudspeaker, achieving higher sensitivity, a wider dynamic range, and lower distortion. Finite element simulation verification shows that this size and shape constitute the optimal magnetic circuit shape in a 50mm moving coil unit.

[0037] Furthermore, this scheme systematically determined the optimal magnetic circuit design dimensions through precise calculations and finite element simulation analysis. At the magnetic gap, the optimized design significantly improved the magnetic field density and strength. Through this optimization process, the transduction efficiency of the miniature speaker was maximized, resulting in higher sensitivity, a wider dynamic range, and lower distortion. Moreover, headphone products using this design exhibited a significant improvement in sound quality, fully meeting consumers' demands for high-quality audio.

[0038] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A dynamic coil unit basket structure, characterized in that, It includes an upper magnetic conductor (10), a magnetic circuit (11) and a lower magnetic conductor (8). The magnetic circuit (11) is disposed between the upper magnetic conductor (10) and the lower magnetic conductor (8). A high leakage frame (1) is disposed on the outside of the upper magnetic conductor (10). A number of protrusions are disposed inside the high leakage frame (1). The protrusions are arranged around the high leakage frame (1). An opening is provided between adjacent protrusions to penetrate the high leakage frame (1). A diaphragm (3) is disposed on the upper part of the upper magnetic conductor (10) and the high leakage frame (1). The upper magnetic conductor (10) is connected to the diaphragm (3) through a voice coil (5). The high leakage frame (1) is connected to the diaphragm (3) through a diaphragm support (2).

2. The moving-coil unit frame structure according to claim 1, characterized in that, The upper magnetic conductor (10) includes an upper inner magnetic conductor (6) and an upper outer magnetic conductor (4). The upper inner magnetic conductor (6) is located inside the upper outer magnetic conductor (4) and is coaxially arranged.

3. The moving-coil unit frame structure according to claim 2, characterized in that, The magnetic circuit (11) includes an outer magnet (9) and an inner magnet (7), wherein the inner magnet (7) is located inside the outer magnet (9) and is coaxially arranged.

4. The moving-coil unit frame structure according to claim 3, characterized in that, The bottom end of the diaphragm (3) is located between the outer magnet (9) and the inner magnet (7).

5. A moving-coil unit frame structure according to claim 2, characterized in that, The bottom length of the upper inner magnetic conductor (6) is 4.2 mm, the top length is 3.2 mm, the height is 1 mm, the arc length is 1.57 mm, and the arc radius is 1 mm. The upper outer magnetic conductor (4) has a bottom length of 2 mm, a top length of 1.5 mm, an inner height of 1 mm, an arc length of 0.79 mm, an arc radius of 0.5 mm, and an arc bottom height of 0.5 mm.

6. The moving-coil unit frame structure according to claim 3, characterized in that, The inner magnet (7) has a bottom length of 4.2 mm, a top length of 4.2 mm, and a height of 2 mm. The outer magnet (9) has a bottom length of 2 mm, a top length of 2 mm, and a height of 2 mm.

7. The moving-coil unit frame structure according to claim 3, characterized in that, The lower magnetic conductor (8) has a bottom length of 5.2 mm, a top length of 6.7 mm, an inner arc length of 0.79 mm, an arc bottom height of 0.5 mm, an arc radius of 0.5 mm, an outer arc length of 1.57 mm, and an arc radius of 1 mm.

8. A moving-coil unit frame structure according to any one of claims 1-7, characterized in that, The effective open area of ​​the opening is greater than 30% of the vibration area of ​​the diaphragm (3).

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