A loudspeaker

Abstract

A loudspeaker provided by the present invention includes a magnetic circuit assembly, a diaphragm assembly, a vibration monitoring and correction assembly, and a plurality of auxiliary voice coils; the plurality of auxiliary voice coils are arranged at intervals on the diaphragm assembly; the metal winding on the auxiliary voice coil can cut the magnetic induction lines generated by the magnetic circuit assembly as the diaphragm assembly vibrates to generate an electromotive force; the vibration monitoring and correction assembly is electrically connected to the plurality of auxiliary voice coils respectively to detect the electromotive forces generated by the plurality of auxiliary voice coils, and apply corresponding currents to each of the auxiliary voice coils according to the detection results to ensure the consistency of the vibration of different positions of the diaphragm assembly. An auxiliary voice coil is added on the basis of the original loudspeaker, and the vibration monitoring and correction assembly adjusts the amplitude of the electrical signals of the plurality of auxiliary voice coils, so that the current passing through the auxiliary voice coil at this end increases or decreases, and the driving force obtained in the magnetic field, thereby generating an upward or downward acting force for compensation, and improving the rolling or swaying phenomenon of the vibration system.

Description

Technical Field

[0001] The present invention relates to the technical field of loudspeaker manufacturing, and particularly to a loudspeaker. Background Art

[0002] An electrodynamic loudspeaker is also called a moving coil loudspeaker; it is an electroacoustic transducer that applies the principle of electrodynamics; it is currently the most widely used loudspeaker, and there are mainly three reasons for this: 1. The electrodynamic loudspeaker has a simple structure, is easy to produce, and does not require a large space itself, resulting in a low price and can be popularized in large quantities. 2. Such loudspeakers can achieve excellent performance and can obtain a uniform frequency response in the mid-frequency range. 3. Such loudspeakers are constantly being improved. The development history of loudspeakers for decades is the history of continuous improvement of loudspeaker design, technology, and materials, and also the history of performance keeping pace with the times. According to Faraday's law, when a current-carrying conductor passes through a magnetic field, it will be subjected to an Ampere force, the direction of which conforms to the left-hand rule, and the force is perpendicular to the current and magnetic field directions, and the magnitude of the force is proportional to the current, wire length, and magnetic flux density. When an alternating audio current is input to the voice coil, the voice coil is subjected to an alternating driving force to generate an alternating motion, driving the diaphragm assembly to vibrate and repeatedly pushing the air to produce sound. The loudspeaker manufactured by using this principle will have the problem of overall machine noise; the main reason is that when the loudspeaker or loudspeaker module is working, the distortion frequency components caused by the swing of the vibration system, or even the noise caused by the collision of the vibration system with the magnetic circuit system. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: a loudspeaker provided by the present invention improves the sound quality of the loudspeaker.

[0004] In order to solve the above technical problem, the technical solution adopted by the present invention is:

[0005] A loudspeaker includes a magnetic circuit assembly, a diaphragm assembly, a vibration monitoring and correction assembly, and a plurality of auxiliary voice coils;

[0006] The plurality of auxiliary voice coils are arranged on the diaphragm assembly at intervals;

[0007] The metal winding on the auxiliary voice coil can cut the magnetic induction lines generated by the magnetic circuit assembly as the diaphragm assembly vibrates to generate an electromotive force;

[0008] The vibration monitoring and correction assembly is electrically connected to the plurality of auxiliary voice coils respectively to detect the electromotive forces generated by the plurality of auxiliary voice coils, and apply corresponding currents to each of the auxiliary voice coils according to the detection results to ensure the consistency of the vibration of different positions of the diaphragm assembly.

[0009] The beneficial effects of the present invention are as follows: A loudspeaker provided by the present invention includes a magnetic circuit assembly, a diaphragm assembly, a vibration monitoring and correction assembly, and a plurality of auxiliary voice coils; the plurality of auxiliary voice coils are arranged at intervals on the diaphragm assembly; the metal winding on the auxiliary voice coil can cut the magnetic induction lines generated by the magnetic circuit assembly as the diaphragm assembly vibrates to generate an electromotive force; the vibration monitoring and correction assembly is electrically connected to the plurality of auxiliary voice coils respectively to detect the electromotive forces generated by the plurality of auxiliary voice coils, and apply corresponding currents to each of the auxiliary voice coils according to the detection results to ensure the consistency of the vibrations of different positions of the diaphragm assembly. This design adds auxiliary voice coils on the basis of the original loudspeaker. When the up-and-down amplitudes of the diaphragm assembly are asymmetric, the vibration monitoring and correction assembly adjusts the amplitudes of the electrical signals of the plurality of auxiliary voice coils, so that the current passing through the auxiliary voice coil at this end increases or decreases, and the driving force obtained in the magnetic field, thereby exerting an upward or downward acting force for compensation, making the up-and-down amplitudes of the diaphragm assembly symmetrical, improving the rolling or swaying phenomenon of the vibration system, and achieving the purpose of improving the acoustic performance of the loudspeaker. Description of the Drawings

[0010] Figure 1 The front view of a loudspeaker according to an embodiment of the present invention is shown;

[0011] Figure 2 The top view of a loudspeaker according to an embodiment of the present invention is shown;

[0012] Figure 3 The left view of a loudspeaker according to an embodiment of the present invention is shown;

[0013] Figure 4 The bottom view of a loudspeaker according to an embodiment of the present invention is shown;

[0014] Figure 5 The internal structure diagram of a loudspeaker according to an embodiment of the present invention is shown;

[0015] Figure 6 The top view of the internal structure of a loudspeaker according to an embodiment of the present invention is shown;

[0016] Figure 7 The sectional view of a loudspeaker according to an embodiment of the present invention is shown;

[0017] Figure 8 The exploded view of the parts assembly of a loudspeaker according to an embodiment of the present invention is shown;

[0018] Reference Numeral Explanation:

[0019] 1. Magnetic circuit assembly; 2. Diaphragm assembly; 3. Auxiliary voice coil; 4. Flange; 5. Main voice coil; 6. Support member; 7. Speaker frame; 8. Washer. Detailed Embodiment

[0020] To describe the technical content, achieved objectives and effects of the present invention in detail, the following is described in conjunction with the embodiments and with reference to the accompanying drawings.

[0021] Please refer to Figures 1 to 8 , a loudspeaker, comprising a magnetic circuit assembly, a diaphragm assembly, a vibration monitoring and correction assembly, and a plurality of auxiliary voice coils;

[0022] The plurality of auxiliary voice coils are arranged at intervals on the diaphragm assembly;

[0023] The metal winding on the auxiliary voice coil can cut the magnetic induction lines generated by the magnetic circuit assembly as the diaphragm assembly vibrates to generate an electromotive force;

[0024] The vibration monitoring and correction assembly is electrically connected to the plurality of auxiliary voice coils respectively to detect the electromotive forces generated by the plurality of auxiliary voice coils, and applies corresponding currents to each of the auxiliary voice coils according to the detection results to ensure the consistency of the vibrations at different positions of the diaphragm assembly.

[0025] Working principle of the present invention: When a main voice coil is connected to an electrical signal with a certain amplitude, the main voice coil will drive the diaphragm assembly to vibrate up and down. Since the auxiliary voice coils are arranged on the diaphragm assembly, the auxiliary voice coils will vibrate together with the diaphragm assembly. The metal winding on the auxiliary voice coil can cut the magnetic induction lines generated by the magnetic circuit assembly as the diaphragm assembly vibrates to generate an electromotive force E = BLV. The vibration monitoring and correction assembly is electrically connected to the plurality of auxiliary voice coils respectively to detect the electromotive forces generated by the plurality of auxiliary voice coils.

[0026] When the heights of the plurality of auxiliary voice coils from the magnetic circuit assembly are the same, the states of cutting the magnetic induction lines of the magnetic circuit assembly are the same, so the generated real-time motional electromotive forces are also the same; when there is rolling / vibrating in the actual vibration system, resulting in inconsistent vibration heights at the four ends of the diaphragm assembly, thus causing inconsistent cutting of the magnetic induction lines by different auxiliary voice coils, making the generated motional electromotive forces unequal. By monitoring this data difference through the vibration monitoring and correction assembly, the rolling / vibrating state of the micro loudspeaker can be obtained.

[0027] When the vibration monitoring and correction assembly monitors that at one end or several ends of the different auxiliary voice coils on the diaphragm assembly, the height is lower or higher, by adjusting the amplitude of the electrical signal of the auxiliary voice coil on this end of the diaphragm assembly, the current passing through this end of the auxiliary voice coil is increased or decreased, and the obtained Ampere force F = BIL is increased or decreased compared with other ends, so as to exert an upward or downward acting force for compensation, so that the heights of the four ends of the diaphragm assembly are kept consistent, solve the rolling / vibrating, complete the real-time correction, reach the equilibrium state, thereby improving the sound quality effect and the reliability margin.

[0028] As can be seen from the above description, the beneficial effects of the present invention are as follows: A loudspeaker provided by the present invention includes a magnetic circuit assembly, a diaphragm assembly, a vibration monitoring and correction assembly, and a plurality of auxiliary voice coils; the plurality of auxiliary voice coils are arranged at intervals on the diaphragm assembly; the metal winding on the auxiliary voice coil can cut the magnetic induction lines generated by the magnetic circuit assembly as the diaphragm assembly vibrates to generate an electromotive force; the vibration monitoring and correction assembly is electrically connected to the plurality of auxiliary voice coils respectively to detect the electromotive forces generated by the plurality of auxiliary voice coils, and apply corresponding currents to each of the auxiliary voice coils according to the detection results to ensure the consistency of the vibrations at different positions of the diaphragm assembly. This design adds auxiliary voice coils on the basis of the original loudspeaker. When the up-and-down amplitudes of the diaphragm assembly are asymmetric, the vibration monitoring and correction assembly adjusts the amplitudes of the electrical signals of the plurality of auxiliary voice coils, so that the current passing through the auxiliary voice coil at this end increases or decreases, and the driving force obtained in the magnetic field, thereby exerting an upward or downward acting force for compensation, making the up-and-down amplitudes of the diaphragm assembly symmetrical, improving the rolling or swaying phenomenon of the vibration system, and achieving the purpose of improving the acoustic performance of the loudspeaker.

[0029] Further, a plurality of flanges are provided on the magnetic circuit assembly;

[0030] The plurality of flanges are arranged corresponding to the plurality of auxiliary voice coils; and the auxiliary voice coils are slidably sleeved on the flanges.

[0031] As can be seen from the above description, the setting of the flanges not only plays a guiding role for the auxiliary voice coils, but also provides the magnetic field required for the operation of the auxiliary voice coils.

[0032] Further, it further includes a plurality of iron cores;

[0033] A plurality of mounting holes for mounting the iron cores are provided on the magnetic circuit assembly;

[0034] The plurality of mounting holes are arranged corresponding to the plurality of auxiliary voice coils; and the auxiliary voice coils are slidably sleeved on the iron cores.

[0035] As can be seen from the above description, the setting of the iron cores can enhance the magnetic induction intensity of the magnetic field where the auxiliary voice coils are located, achieve higher monitoring resolution, and make the correction driving force greater.

[0036] Further, the vibration monitoring and correction assembly includes a processor and an external power amplifier circuit;

[0037] One end of the external power amplifier circuit is electrically connected to the plurality of auxiliary voice coils respectively, and the other end is electrically connected to the processor.

[0038] As described above, the amplitude of the detected electromotive force is amplified by an external power amplifier circuit and then the signal is transmitted to a processor for electrical signal analysis and comparison. After comparison, a corresponding adjustment current is sent to different secondary voice coils to achieve self-balancing. The specific internal components and the connections between the components of the external power amplifier circuit and the processor belong to the prior art, so no further elaboration will be made here.

[0039] Further, the multiple secondary voice coils are arranged at equal intervals on the diaphragm assembly.

[0040] As described above, the purpose of arranging the secondary voice coils at equal intervals is to better achieve the balance of the rolling or swinging state of the diaphragm assembly; at the same time, it also avoids the rolling or swinging phenomenon of the diaphragm assembly caused by the uneven distribution of the secondary voice coils on the diaphragm assembly.

[0041] Further, the multiple secondary voice coils are symmetrically arranged about the center point of the diaphragm assembly.

[0042] As described above, the purpose of symmetrically arranging the secondary voice coils about the center point of the diaphragm assembly is to better achieve the balance of the rolling or swinging state of the diaphragm assembly; at the same time, it also avoids the rolling or swinging phenomenon of the diaphragm assembly caused by the uneven distribution of the secondary voice coils on the diaphragm assembly.

[0043] Further, the distances from the multiple secondary voice coils to the magnetic circuit assembly are equal.

[0044] As described above, when the diaphragm assembly is not working or the diaphragm vibrates normally, the purpose of the equal distances between the metal windings on the secondary voice coils and the magnetic circuit assembly is to ensure that the electromotive forces generated by different secondary voice coils during operation are equal, achieving the purpose of simplifying the calibration operation. As long as the corresponding difference calculation is performed, the vibration state can be compared.

[0045] Further, it includes four secondary voice coils;

[0046] The four secondary voice coils are symmetrically arranged on the diaphragm assembly near the corners of the diaphragm assembly.

[0047] As described above, the purpose of symmetrically arranging the secondary voice coils near the corners of the diaphragm assembly is to better achieve the balance of the rolling or swinging state of the diaphragm assembly; at the same time, it also avoids the rolling or swinging phenomenon of the diaphragm assembly caused by the uneven distribution of the secondary voice coils on the diaphragm assembly.

[0048] Further, it further includes a main voice coil, and the main voice coil is fixedly arranged at the central position of the diaphragm assembly;

[0049] The secondary voice coils are wound outside the main voice coil.

[0050] As described above, the secondary voice coil is arranged outside the main voice coil, which can not affect the volume of the internal magnetic steel and has little influence on the magnetic induction intensity of the magnetic field for the operation of the main voice coil.

[0051] Furthermore, it further includes a support component;

[0052] The support component is fixedly connected to the lower part of the main voice coil for supporting the main voice coil.

[0053] As described above, the support component can effectively support the secondary voice coil and the main voice coil.

[0054] Please refer to Figures 1 to 8 , Embodiment 1 of the present invention is: a loudspeaker, including a magnetic circuit component 1, a diaphragm component 2, a vibration monitoring and correction component, and a plurality of secondary voice coils 3;

[0055] The plurality of secondary voice coils 3 are arranged on the diaphragm component 2 at intervals;

[0056] The metal winding on the secondary voice coil 3 can cut the magnetic induction lines generated by the magnetic circuit component 1 as the diaphragm component 2 vibrates to generate an electromotive force;

[0057] The vibration monitoring and correction component is electrically connected to the plurality of secondary voice coils 3 respectively to detect the electromotive forces generated by the plurality of secondary voice coils 3, and apply corresponding currents to each of the secondary voice coils 3 according to the detection results to ensure the consistency of the vibrations at different positions of the diaphragm component 2.

[0058] Please refer to Figures 6 to 8 , Specifically, a plurality of flanges 4 are provided on the magnetic circuit component 1;

[0059] The plurality of flanges 4 are arranged corresponding to the plurality of secondary voice coils 3; and the secondary voice coil 3 can be slidably sleeved on the flange 4.

[0060] Specifically, the vibration monitoring and correction component includes a processor and an external power amplifier circuit; the processor can be a CPU or a DSP;

[0061] One end of the external power amplifier circuit is electrically connected to the plurality of secondary voice coils 3 respectively, and the other end is electrically connected to the processor.

[0062] Please refer to Figures 5 to 7 , Specifically, the plurality of secondary voice coils 3 are arranged on the diaphragm component 2 at equal intervals.

[0063] Please refer to Figures 5 to 7 , Specifically, the plurality of secondary voice coils 3 are symmetrically arranged about the center point of the diaphragm component 2.

[0064] Please refer to Figure 8, specifically, it further includes a basin frame 7, and the basin frame 7 is integrally injection-molded with a washer 8; the magnetic circuit assembly 1 is disposed below the basin frame 7; the support member 6 is disposed below the main voice coil 5 and the auxiliary voice coil 3; the diaphragm assembly 2 is disposed above the main voice coil 5 and the auxiliary voice coil 3.

[0065] Among them, the magnetic induction lines emitted by the magnetic circuit assembly 1 are perpendicular to both the vibration direction of the auxiliary voice coil 3 and the wire routing direction of the metal winding of the auxiliary voice coil 3; the magnetic induction intensity is different along the vibration direction of the auxiliary voice coil 3. The metal windings on the auxiliary voice coil 3 are respectively connected to the external signal through the incoming and outgoing lines.

[0066] Please refer to Figure 7 , Embodiment 2 of the present invention is: On the basis of Embodiment 1, the distances from multiple said auxiliary voice coils 3 to the magnetic circuit assembly 1 are equal.

[0067] Please refer to Figure 5 and Figure 6 , specifically, it includes four auxiliary voice coils 3;

[0068] The four auxiliary voice coils 3 are symmetrically disposed on the diaphragm assembly 2 near the corners of the diaphragm assembly 2.

[0069] Embodiment 3 of the present invention is: On the basis of Embodiment 1 or 2, it further includes a main voice coil 5, and the main voice coil 5 is fixedly disposed at the central position of the diaphragm assembly 2;

[0070] The auxiliary voice coil 3 is wound outside the main voice coil.

[0071] Specifically, it further includes a support member 6;

[0072] The support member 6 is fixedly disposed below the main voice coil 5 to support the main voice coil 5.

[0073] Specifically, the support member 6 is fixedly connected to the basin frame 7, and the support member 6 and the main voice coil 5 are fixed by means of gluing.

[0074] Embodiment 4 of the present invention is: The difference between this embodiment and Embodiment 1 lies in the different generation methods of the working magnetic field of the auxiliary voice coil 3. Specifically, it includes multiple iron cores;

[0075] Multiple mounting holes for mounting the iron cores are provided on the magnetic circuit assembly 1;

[0076] The multiple mounting holes are correspondingly disposed with the multiple auxiliary voice coils 3; and the auxiliary voice coil 3 can be slidably sleeved on the iron core.

[0077] In summary, a loudspeaker provided by the present invention includes a magnetic circuit assembly, a diaphragm assembly, a vibration monitoring and correction assembly, and a plurality of auxiliary voice coils; the plurality of auxiliary voice coils are arranged on the diaphragm assembly at intervals; the metal winding on the auxiliary voice coil can cut the magnetic induction lines generated by the magnetic circuit assembly as the diaphragm assembly vibrates to generate an electromotive force; the vibration monitoring and correction assembly is electrically connected to the plurality of auxiliary voice coils respectively to detect the electromotive forces generated by the plurality of auxiliary voice coils, and apply corresponding currents to each of the auxiliary voice coils according to the detection results to ensure the consistency of the vibrations at different positions of the diaphragm assembly. In this design, auxiliary voice coils are added on the basis of the original loudspeaker. When the up-and-down amplitudes of the diaphragm assembly are asymmetric, the vibration monitoring and correction assembly adjusts the amplitude of the electrical signals of the plurality of auxiliary voice coils, so that the current passing through the auxiliary voice coil at this end increases or decreases, and the driving force obtained in the magnetic field, thereby exerting an upward or downward acting force for compensation, making the up-and-down amplitudes of the diaphragm assembly symmetric, improving the rolling or swaying phenomenon of the vibration system, and achieving the purpose of improving the acoustic performance of the loudspeaker. Further, setting a flange on the magnetic circuit assembly not only plays a guiding role for the auxiliary voice coil, but also provides the magnetic field required for the operation of the auxiliary voice coil; alternatively, a iron core is arranged on the magnetic circuit assembly, which can enhance the magnetic induction intensity of the magnetic field where the auxiliary voice coil is located, achieving higher monitoring resolution and making the correction driving force greater. Moreover, arranging the auxiliary voice coil outside the main voice coil can not affect the volume of the internal magnet and has little influence on the magnetic induction intensity of the magnetic field for the operation of the main voice coil.

[0078] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent transformation made by using the specification and drawings of the present invention, or directly or indirectly applied in the related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A loudspeaker, characterized in that, It includes a magnetic circuit component, a diaphragm component, a vibration monitoring and correction component, and a plurality of auxiliary voice coils; The plurality of auxiliary voice coils are arranged at intervals on the diaphragm component; The metal winding on the auxiliary voice coil can cut the magnetic induction lines generated by the magnetic circuit component as the diaphragm component vibrates to generate electromotive force; The vibration monitoring and correction component is electrically connected to the plurality of auxiliary voice coils respectively to detect the electromotive force generated by the plurality of auxiliary voice coils, and apply corresponding current to each of the auxiliary voice coils according to the detection result to ensure the consistency of the vibration of different positions of the diaphragm component; A plurality of flanges are provided on the magnetic circuit component; The plurality of flanges are arranged corresponding to the plurality of auxiliary voice coils; and the auxiliary voice coil can be slidably sleeved on the flange.

2. The loudspeaker according to claim 1, wherein, It further includes a plurality of iron cores; A plurality of mounting holes for mounting the iron cores are provided on the magnetic circuit component; The plurality of mounting holes are arranged corresponding to the plurality of auxiliary voice coils; and the auxiliary voice coil can be slidably sleeved on the iron core.

3. A loudspeaker according to claim 1, characterized in that, The vibration monitoring and correction component includes a processor and an external power amplifier circuit; One end of the external power amplifier circuit is electrically connected to the plurality of auxiliary voice coils respectively, and the other end is electrically connected to the processor.

4. A loudspeaker according to claim 1, characterized in that, The plurality of auxiliary voice coils are arranged at equal intervals on the diaphragm component.

5. A loudspeaker according to claim 1, characterized in that, The plurality of auxiliary voice coils are symmetrically arranged about the center point of the diaphragm component.

6. A loudspeaker according to claim 1 or 4 or 5, characterized in that, The distances from the plurality of auxiliary voice coils to the magnetic circuit component are equal.

7. A loudspeaker according to claim 6, wherein It includes four auxiliary voice coils; The four auxiliary voice coils are symmetrically arranged on the diaphragm component near the corners of the diaphragm component.

8. A loudspeaker according to claim 1, characterized in that, It further includes a main voice coil, and the main voice coil is fixedly arranged at the central position of the diaphragm component; The auxiliary voice coil is wound outside the main voice coil.

9. A loudspeaker according to claim 8, characterized in that, It further includes a support component; The support component is fixedly connected below the main voice coil to support the main voice coil.

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