A Uniformly Leaked Dual-Magnetic-Circuit Moving-Coil Loudspeaker

Abstract

This utility model discloses a uniformly vented dual-magnetic-circuit moving-coil loudspeaker, including a frame, a diaphragm voice coil mounted on the top of the frame, a partition assembly mounted on the bottom of the frame's inner cavity, and a resonant cavity on opposite sides of the frame and partition assembly. A partition vent hole is circumferentially formed on the partition assembly, and a frame vent hole is circumferentially formed at the bottom of the frame. This utility model has the advantage of uniform venting, solving the problem that existing moving-coil loudspeakers, during use, do not easily and smoothly expel air from the speaker's interior, and when the diaphragm's vibration amplitude is too large, it easily causes unbalanced diaphragm vibration due to impeded air expulsion.

Description

Technical Field

[0001] This utility model relates to the field of loudspeaker technology, specifically to a uniformly deflected dual-magnetic-circuit moving-coil loudspeaker. Background Technology

[0002] A moving-coil loudspeaker, also known as an electrodynamic loudspeaker, is a type of loudspeaker that operates based on electromagnetic principles. It is the most common loudspeaker design and is widely used in various audio equipment. Its basic working principle is based on the magnetic field generated by an electric current passing through a coil. This magnetic field interacts with the magnetic field of a permanent magnet, causing a diaphragm connected to the coil to vibrate, thereby pushing air to produce sound. Specifically, the audio signal enters the voice coil in the loudspeaker unit in the form of an electric current. The voice coil is located in the magnetic field of a fixed magnetic circuit system. As the audio current changes, the voice coil generates a corresponding changing magnetic field. This changing magnetic field interacts with the constant magnetic field generated by the permanent magnet, causing the voice coil and its connected diaphragm to vibrate, thus generating sound waves. When the diaphragm operates, it compresses the air inside the loudspeaker, so vent holes are provided on the loudspeaker to prevent the increased internal pressure from affecting the diaphragm's vibration.

[0003] Existing dynamic loudspeakers do not easily expel air evenly from inside the speaker during use. When the diaphragm vibrates too much, it can easily cause air to be expelled improperly, resulting in an imbalance in diaphragm vibration. Utility Model Content

[0004] The purpose of this invention is to provide a uniformly vented dual-magnetic-circuit moving-coil loudspeaker, which has the advantage of uniform venting and solves the problem that existing moving-coil loudspeakers are not easy to expel air smoothly during use, and when the diaphragm vibration amplitude is too large, it is easy to cause unsmooth air expulsion and diaphragm vibration imbalance.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a uniformly vented dual magnetic circuit moving coil loudspeaker, comprising a frame, a diaphragm voice coil mounted on the top of the frame, a partition assembly mounted on the bottom of the inner cavity of the frame, and a resonant cavity provided on the opposite side of the frame and the partition assembly;

[0006] The partition assembly is provided with partition vent holes, and the bottom of the basin frame is provided with basin frame vent holes.

[0007] An external magnet is installed on the top of the partition assembly, an external washer is installed on the top of the external magnet, an internal washer is provided inside the external washer, an internal magnet or T-iron is installed inside the external magnet, and the internal washer is installed on top of the internal magnet or T-iron.

[0008] As a preferred embodiment of the present invention, the vent hole of the basket frame is rectangular, a basket frame mesh is fixedly connected to the bottom of the basket frame, the basket frame mesh covers the vent hole of the basket frame, and the basket frame mesh is annular.

[0009] As a preferred embodiment of the present invention, a uniformly vented dual-magnetic-circuit moving-coil loudspeaker has a central hole at the center of the newash, inner magnet, partition assembly, and frame, and a central hole mesh is provided at the bottom of the frame, which covers the central hole at the bottom of the frame. The central hole mesh is circular.

[0010] As a preferred embodiment of the present invention, a uniformly vented dual-magnetic-circuit moving-coil loudspeaker has a solder pad at the bottom of the frame, and the solder pad is electrically connected to the diaphragm voice coil.

[0011] As a preferred embodiment of the present invention, a uniformly vented dual-magnetic-circuit moving-coil loudspeaker, when an inner magnet is installed inside an outer magnet, the inner magnet is fixedly installed on the opposite side of the nervous and the partition assembly.

[0012] As a preferred embodiment of the present invention, when a T-iron is installed inside the outer magnet, the top of the T-iron is fixedly connected to the Nevada, the partition assembly is sleeved on the T-iron, the bottom of the T-iron is fixedly connected to the bottom of the frame, the central mesh and the solder pad are installed on the bottom of the T-iron, the T-iron surface is surrounded by T-iron holes, the T-iron interior is provided with a central hole communicating with the T-iron holes, and the T-iron holes and the central hole are connected to the resonant cavity.

[0013] As a preferred embodiment of the present invention, a uniformly vented dual-magnetic-circuit moving-coil loudspeaker, the bottom of the partition assembly is provided with a gasket, which is installed on the bottom of the inner wall of the frame.

[0014] As a preferred embodiment of the present invention, a uniformly vented dual-magnetic-circuit moving-coil loudspeaker, the bottom of the partition assembly is provided with an outer ring rib and an inner ring rib, the outer ring rib and the inner ring rib are installed on the bottom of the inner wall of the frame, and an arc-shaped groove is provided around the bottom of the outer ring rib.

[0015] As a preferred embodiment of the present invention, a uniformly vented dual-magnetic-circuit moving-coil loudspeaker has a rear cover assembly fixedly connected to the bottom of the frame, and the rear cover assembly has a rear air chamber inside.

[0016] As a preferred embodiment of the present invention, a dual-magnetic-circuit moving-coil loudspeaker with uniform air leakage, the bottom of the rear cover assembly is fixedly connected with a rear cover mesh.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. This utility model significantly improves the acoustic performance and structural rationality of the loudspeaker by adopting an internal and external dual magnetic circuit structure and optimizing the venting channel design. First, by setting up a dual magnetic circuit system with an inner and outer magnet, the magnetic flux distribution in the voice coil region is more uniform, effectively improving the utilization efficiency of magnetic energy. This solves the problems of uneven magnetic field distribution in the magnetic gap and large fluctuations in magnetic flux density during voice coil movement in traditional single magnetic circuit loudspeakers. At the same time, the synergistic effect of the internal and external magnetic circuits enhances the driving capability and improves the stability and dynamic performance of the overall response, thereby achieving clearer and more accurate sound reproduction. In addition, by setting a resonant cavity between the partition assembly and the frame, and combining the design of the central hole and the venting hole, the airflow in the rear cavity can be selectively absorbed and buffered through the Helmholtz resonant cavity, effectively suppressing the energy peak at a specific frequency and reducing the resulting standing waves and frequency response distortion.

[0019] 2. Compared with traditional circular vent holes, the rectangular vent hole of this utility model has a larger venting area. Combined with the surrounding layered vent holes and central hole, the air in the rear cavity of the diaphragm can be discharged more evenly and smoothly, thereby improving the air pressure damping during diaphragm movement and enhancing the linearity of the vibration system. At the same time, the vent mesh and central hole mesh not only effectively prevent dust from entering, but also play a certain role in regulating the high-frequency response. The pads are located at the bottom of the vent, without occupying the venting area, further ensuring the integrity of the venting channel. The introduction of the gasket helps to precisely control the volume of the resonant cavity, making it easy to adjust the acoustic characteristics of the speaker according to actual needs. Overall, this solution has significant advantages in improving sound quality, reducing distortion, enhancing structural stability and manufacturing consistency, and is suitable for audio equipment applications with high audio performance requirements. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model. Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the structure of Embodiment 1 of the present utility model. Figure 2 ;

[0022] Figure 3 This is an exploded view of Embodiment 1 of this utility model;

[0023] Figure 4 This is a cross-sectional view of Embodiment 1 of the present invention;

[0024] Figure 5 This is a schematic diagram of the partition component in Embodiment 1 of the present invention. Figure 1 ;

[0025] Figure 6 This is a schematic diagram of the partition component in Embodiment 1 of the present invention. Figure 2 ;

[0026] Figure 7 This is a simulation diagram of the magnetic flux of Embodiment 1 of this utility model;

[0027] Figure 8 This is a simulation diagram of the acoustic flow of Embodiment 1 of this utility model;

[0028] Figure 9 This is a simulation diagram of the acoustic flow of a conventional loudspeaker;

[0029] Figure 10 This is a cross-sectional view of Embodiment 2 of the present invention;

[0030] Figure 11 This is a schematic diagram of the T-iron of this utility model;

[0031] Figure 12 This is a cross-sectional view of Embodiment 3 of the present invention;

[0032] Figure 13 This is a schematic diagram of the partition component in Embodiment 3 of the present invention. Figure 1 ;

[0033] Figure 14 This is a schematic diagram of the partition component in Embodiment 3 of the present invention. Figure 2 ;

[0034] Figure 15 This is a cross-sectional view of embodiment 4 of the present utility model;

[0035] Figure 16 This is a schematic diagram of the back cover assembly of this utility model.

[0036] In the diagram: 1. Bass frame; 2. Diaphragm voice coil; 3. Isolation assembly; 4. Isolation vent; 5. Bass frame vent; 6. Resonance cavity; 7. Outer magnet; 8. Outer washer; 9. Inner magnet; 10. Nevada washer; 11. Mesh with center hole; 12. Bass frame mesh; 13. Solder pad; 14. Gasket; 15. Center hole; 16. T-iron; 17. T-iron hole; 18. Outer ring rib; 19. Inner ring rib; 20. Arc groove; 21. Rear cover assembly; 22. Rear cover mesh; 23. Rear chamber. Detailed Implementation

[0037] Example 1

[0038] Please see Figures 1-9 A uniformly vented dual-magnetic-circuit moving-coil loudspeaker includes a frame 1, a diaphragm voice coil 2 mounted on the top of the frame 1, a partition assembly 3 mounted on the bottom of the inner cavity of the frame 1, and a resonant cavity 6 provided on the opposite side of the frame 1 and the partition assembly 3.

[0039] Furthermore, the partition assembly 3 is provided with partition vent holes 4, and the bottom of the basin frame 1 is provided with basin frame vent holes 5.

[0040] Furthermore, an outer magnet 7 is installed on the top of the partition assembly 3, an outer washer 8 is installed on the top of the outer magnet 7, an inner washer 10 is provided inside the outer washer 8, an inner magnet 9 is installed inside the outer magnet 7, and the inner washer 10 is installed on the top of the inner magnet 9.

[0041] Furthermore, the vent hole 5 of the basin frame is rectangular, and a basin frame mesh 12 is fixedly connected to the bottom of the basin frame 1. The basin frame mesh 12 covers the vent hole 5 of the basin frame, and the basin frame mesh 12 is annular.

[0042] Furthermore, a central hole 15 is provided at the center of the Nevada 10, the inner magnet 9, the partition assembly 3 and the basin stand 1, and a central hole mesh 11 is provided at the bottom of the basin stand 1, which covers the central hole 15 at the bottom of the basin stand 1. The central hole mesh 11 is circular.

[0043] Furthermore, the bottom of the frame 1 is provided with a solder pad 13, which is electrically connected to the diaphragm voice coil 2.

[0044] Furthermore, when the inner magnet 9 is installed inside the outer magnet 7, the inner magnet 9 is fixedly installed on the opposite side of the Nevada 10 and the partition assembly 3.

[0045] Furthermore, a gasket 14 is provided at the bottom of the partition assembly 3, and the gasket 14 is installed at the bottom of the inner wall of the basin frame 1.

[0046] Furthermore, the vent hole 5 of the basin stand is rectangular, which increases the venting area and makes venting smoother compared to the traditional circular vent hole 5 of the basin stand.

[0047] Furthermore, when the solder pad 13 is installed at the bottom of the frame 1, it does not occupy the position of the frame mesh 12, so that the frame mesh 12 forms a ring structure, and all the surrounding frame vent holes 5 can vent, making the airflow under the diaphragm voice coil 2 smoother, effectively improving the damping of the diaphragm rear cavity, and further reducing distortion.

[0048] Furthermore, the diaphragm voice coil 2 is the core component of the dynamic loudspeaker. The diaphragm voice coil 2 includes a diaphragm and a voice coil. The diaphragm is mounted on the top of the inner cavity of the frame 1. The diaphragm is responsible for converting the mechanical movement of the voice coil into sound waves, which push the air to produce sound. The voice coil generates a changing magnetic field when an audio current passes through it. This magnetic field interacts with the constant magnetic field generated by the outer magnet 7 and the inner magnet 9, driving the diaphragm to vibrate and produce sound. The voice coil is fitted onto the NWIS 10 and is located inside the outer washer 8. The NWIS 10 and the outer washer 8 are located above the inner magnet 9 and the outer magnet 7, concentrating and guiding the magnetic flux through the magnetic gap where the voice coil is located, thereby improving the magnetic field efficiency. The inner magnet 9 and the outer magnet 7 provide a strong constant magnetic field. This magnetic field interacts with the magnetic field generated by the audio current flowing through the voice coil, causing the voice coil and the diaphragm connected to it to move and produce sound. Through the design of the inner and outer magnetic fields, the magnetic energy utilization rate is improved. Traditional dynamic loudspeakers use a single magnetic circuit structure, which results in an uneven distribution of the magnetic field in the magnetic gap. When the voice coil moves up and down in the magnetic gap, the magnetic flux density changes significantly.

[0049] Furthermore, pad 13 is where electrical signals are input. External audio signals are transmitted to the voice coil through soldering or direct connection. The center hole mesh 11 covers the center hole 15 on the frame 1, and the frame mesh 12 covers the frame vent 5 on the frame 1. Its main function is to prevent dust from entering the voice coil area and avoid affecting its performance. At the same time, it has a certain impact on the high frequency response.

[0050] Furthermore, the gasket 14 is located on the opposite side of the partition assembly 3 and the frame 1 to support the partition assembly 3, thereby forming the resonant cavity 6. The thickness of the gasket 14 is 0.2-2mm.

[0051] Furthermore, the resonant cavity 6 is a Helmholtz resonant cavity, which consists of a closed cavity and an opening connected to this cavity. The cavity is on the side opposite to the partition assembly 3 and the frame 1, and the opening is the central hole 15. Its working principle is based on the vibration of air at the central hole 15. When the sound wave reaches a specific frequency that matches the air volume and neck size in the cavity, the air column will vibrate at the neck like a pendulum, causing energy to be absorbed and resonance to occur at that specific frequency. The Helmholtz resonant cavity can selectively absorb sound energy near its resonant frequency. This means that if a loudspeaker system exhibits an excessively strong peak, i.e., excessive energy, in a certain low-frequency range, the excess sound energy can be absorbed by designing a Helmholtz resonant cavity at this frequency, thereby making the sound in this frequency range smoother and reducing the resulting standing waves and frequency response distortion.

[0052] When the diaphragm voice coil 2 is working, the pad 13 transmits the electrical signal to the voice coil on the diaphragm voice coil 2. The voice coil drives the diaphragm on the diaphragm voice coil 2 to vibrate and produce sound. During the vibration of the diaphragm, it drives the air in its rear cavity to move. The air enters the basket vent 5, the partition vent 4 and the central hole 15 respectively. The air in the basket vent 5 passes through the basket mesh 12 and is discharged. The air inside the partition vent 4 and the central hole 15 enters the resonant cavity 6 and is discharged to the outside through the central hole 15 and the central mesh 11 at the bottom of the basket 1. During the air discharge process, excess sound energy is absorbed, making the sound in this frequency range smoother and reducing the standing waves and frequency response distortion caused by it.

[0053] Example 2

[0054] Please see Figures 10-11 This embodiment is based on Embodiment 1, a uniformly vented dual-magnetic-circuit moving-coil loudspeaker, the difference being:

[0055] The outer magnet 7 has a T-iron 16 installed inside, and the Nevada 10 is installed on top of the T-iron 16.

[0056] Furthermore, when the T-iron 16 is installed inside the outer magnet 7, the top of the T-iron 16 is fixedly connected to the Nevada 10, the partition assembly 3 is sleeved on the T-iron 16, the bottom of the T-iron 16 is fixedly connected to the bottom of the frame 1, the central mesh 11 and the solder pad 13 are installed on the bottom of the T-iron 16, the surface of the T-iron 16 is surrounded by T-iron holes 17, the inside of the T-iron 16 is provided with a central hole 15 communicating with the T-iron holes 17, and the T-iron holes 17 and the central hole 15 are connected to the resonant cavity 6.

[0057] Using T-iron 16 instead of inner magnet 9 forms a single magnetic drive speaker. The central hole 15 and T-iron hole 17 on T-iron 16 can also be used for venting. When air flows inside T-iron hole 17, it further absorbs sound energy to help adjust the overall response of the speaker system, making it flatter or achieving the design goal. In addition, T-iron 16 is made of metal, which can dissipate heat and avoid performance degradation due to overheating.

[0058] Example 3

[0059] Please see Figures 12-14 This embodiment is based on Embodiment 1, a uniformly vented dual-magnetic-circuit moving-coil loudspeaker, the difference being:

[0060] Furthermore, the bottom of the partition assembly 3 is provided with an outer ring rib 18 and an inner ring rib 19. The outer ring rib 18 and the inner ring rib 19 are installed on the bottom of the inner wall of the basin frame 1. The bottom of the outer ring rib 18 is provided with an arc-shaped groove 20.

[0061] The use of outer ring ribs 18 and inner ring ribs 19 instead of gaskets 14 improves the integration of the speaker. The outer ring ribs 18 and inner ring ribs 19 are formed at the bottom of the partition assembly 3, eliminating the need to assemble the gaskets 14. Furthermore, the bottom of the outer ring ribs 18 has an arc-shaped groove 20, which can guide the airflow and form a labyrinth phenomenon of surrounding airflow. During the process of sound waves from below the diaphragm being transmitted from below the voice coil to the middle hole 15, the airflow effect greatly improves the phenomenon of standing waves and high-frequency fluctuations in frequency response.

[0062] Example 4

[0063] Please see Figures 15-16 This embodiment is based on Embodiment 1, a uniformly vented dual-magnetic-circuit moving-coil loudspeaker, the difference being:

[0064] Furthermore, a rear cover assembly 21 is fixedly connected to the bottom of the basin frame 1, and a rear air chamber 23 is provided inside the rear cover assembly 21.

[0065] Furthermore, a back cover mesh 22 is fixedly connected to the bottom of the back cover assembly 21.

[0066] Furthermore, the bottom of the rear chamber 23 is provided with a rear cover vent hole that works in conjunction with the rear cover mesh 22.

[0067] After being discharged through the perforated mesh 11 and the frame mesh 12, the air enters the rear chamber 23 inside the rear cover assembly 21, flows inside the rear chamber 23, and is finally discharged through the rear cover mesh 22. The air flow forms a multi-layered labyrinth structure, which can greatly improve the standing wave and high-frequency fluctuation. In addition, the rear chamber 23 can be further improved by adding sound-absorbing cotton and other sound insulation materials.

[0068] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A uniform air leak double magnetic circuit moving coil loudspeaker comprising a frame (1), the top of which is mounted with a diaphragm voice coil (2), characterized in that: A partition assembly (3) is installed at the bottom of the inner cavity of the basin frame (1), and a resonant cavity (6) is provided on the opposite side of the basin frame (1) and the partition assembly (3); The partition assembly (3) is provided with a partition vent hole (4) around its perimeter, and the bottom of the basin frame (1) is provided with a basin frame vent hole (5). The partition assembly (3) is equipped with an outer magnet (7) on top, and an outer washer (8) is installed on top of the outer magnet (7). An inner washer (10) is provided inside the outer washer (8). An inner magnet (9) or a T-iron (16) is installed inside the outer magnet (7). The inner washer (10) is installed on top of the inner magnet (9) or the T-iron (16).

2. A uniform air venting dual magnetic circuit moving coil loudspeaker according to claim 1, characterized in that: The vent hole (5) of the basin stand is rectangular. A basin stand mesh (12) is fixedly connected to the bottom of the basin stand (1). The basin stand mesh (12) covers the vent hole (5) of the basin stand. The basin stand mesh (12) is annular.

3. A uniform air venting dual magnetic circuit moving coil loudspeaker according to claim 1, characterized in that: The center of the newash (10), inner magnet (9), partition assembly (3) and basin stand (1) is provided with a central hole (15), and the bottom of the basin stand (1) is provided with a central hole mesh (11), which covers the central hole (15) at the bottom of the basin stand (1), and the central hole mesh (11) is circular.

4. A uniform air venting dual magnetic circuit moving coil loudspeaker according to claim 3, characterized in that: The bottom of the frame (1) is provided with a solder pad (13), which is electrically connected to the diaphragm voice coil (2).

5. A uniform air venting dual magnetic circuit moving coil loudspeaker according to claim 4, characterized in that: When the inner magnet (9) is installed inside the outer magnet (7), the inner magnet (9) is fixedly installed on the opposite side of the niswax (10) and the partition assembly (3).

6. A uniformly vented dual-magnetic-circuit moving-coil loudspeaker according to claim 5, characterized in that: When the T-iron (16) is installed inside the outer magnet (7), the top of the T-iron (16) is fixedly connected to the Nevada (10), the partition assembly (3) is sleeved on the T-iron (16), the bottom of the T-iron (16) is fixedly connected to the bottom of the frame (1), the central mesh (11) and the pad (13) are installed on the bottom of the T-iron (16), the surface of the T-iron (16) is surrounded by T-iron holes (17), the inside of the T-iron (16) is provided with a central hole (15) communicating with the T-iron holes (17), and the T-iron holes (17) and the central hole (15) are connected to the resonant cavity (6).

7. A uniform air-gap dual magnetic circuit moving coil loudspeaker according to claim 1, characterized in that: The bottom of the partition assembly (3) is provided with a gasket (14), which is installed on the bottom of the inner wall of the basin frame (1).

8. A uniform air venting dual magnetic circuit moving coil loudspeaker according to claim 1, characterized in that: The bottom of the partition assembly (3) is provided with an outer ring rib (18) and an inner ring rib (19). The outer ring rib (18) and the inner ring rib (19) are installed on the bottom of the inner wall of the basin frame (1). The bottom of the outer ring rib (18) is provided with an arc groove (20).

9. A uniform air venting dual magnetic circuit moving coil loudspeaker according to claim 1, characterized in that: The bottom of the basin frame (1) is fixedly connected to a rear cover assembly (21), and the rear cover assembly (21) has a rear air chamber (23) inside.

10. A uniform air venting dual magnetic circuit moving coil loudspeaker according to claim 9, characterized in that: The bottom of the rear cover assembly (21) is fixedly connected to the rear cover mesh fabric (22).

Images