A loudspeaker

Abstract

A loudspeaker provided by the present invention includes a voice coil, a magnetic circuit assembly, a vibration monitoring and correction assembly, and a plurality of vibration detection assemblies; the plurality of vibration detection assemblies are arranged at intervals on the voice coil; the vibration detection assembly includes a metal winding, which can cut the magnetic induction lines generated by the magnetic circuit assembly as the voice coil vibrates to generate an electromotive force; the vibration monitoring and correction assembly is electrically connected to the plurality of vibration detection assemblies respectively to detect the electromotive forces generated by the plurality of vibration detection assemblies, and apply corresponding currents to each of the vibration detection assemblies according to the detection results to ensure the consistency of the vibration of different positions of the voice coil. By adjusting the amplitude of the electrical signals of the plurality of vibration detection assemblies through the vibration monitoring and correction assembly, the driving force obtained in the magnetic field is used to exert an upward or downward acting force for compensation, so that the upper and lower amplitudes of the voice coil are symmetrical, achieving the purpose of improving or enhancing the acoustic performance of the loudspeaker.

Description

Technical Field

[0001] The present invention relates to the technical field of speaker manufacturing, and in particular, to a speaker. Background Art

[0002] At present, the problems of micro speakers and receivers used in mobile terminals are overall machine noise, such as the noise of piano music, abnormal sounds when playing sounds rich in low-frequency components such as drum sounds and male bass, and the breakage of female voices under high voltage. Such noise, abnormal sound, or breakage is usually caused by the distortion frequency components caused by the swing of the vibration system when the speaker or speaker module is working, or even the noise caused by the vibration system colliding with the magnetic circuit system.

[0003] This phenomenon is more common in the overall machine earpiece and speaker module. Because the generation of rolling / vibrating mainly stems from the insufficient restraint degree of the suspension device of the vibration system, the driving force asymmetry caused by the manufacturing process of the magnetic circuit part, and the acoustic resistance asymmetry, and in the overall machine earpiece and speaker module, the position of the speaker unit in the overall machine or module housing is not centered, and the sound outlet hole is opened unidirectionally, resulting in extremely complex sound leakage holes in the front and rear cavities and acoustic resistance asymmetry. Rolling / vibrating also has randomness, that is, for products of the same batch, due to the action of multiple factors, the differences between each single product are very large, and the rolling / vibrating states are inconsistent. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: A speaker provided by the present invention can correct the deviation phenomenon of the vibration component and improve the sound quality of the speaker.

[0005] To solve the above technical problem, the technical solution adopted by the present invention is:

[0006] A speaker, characterized in that it includes a voice coil, a magnetic circuit component, a vibration monitoring and correction component, and a plurality of vibration detection components;

[0007] The plurality of vibration detection components are arranged at intervals on the voice coil;

[0008] The vibration detection component includes a metal winding, which can cut the magnetic induction lines generated by the magnetic circuit component as the voice coil vibrates to generate an electromotive force;

[0009] The vibration monitoring and correction component is electrically connected to the plurality of vibration detection components respectively to detect the electromotive forces generated by the plurality of vibration detection components, and apply corresponding currents to each of the vibration detection components according to the detection results to ensure the consistency of the vibration at different positions of the voice coil.

[0010] The beneficial effects of the present invention are as follows: A loudspeaker provided by the present invention includes a voice coil, a magnetic circuit assembly, a vibration monitoring and correction assembly, and a plurality of vibration detection assemblies; the vibration detection assembly includes a metal winding, which can cut the magnetic induction lines generated by the magnetic circuit assembly as the voice coil vibrates to generate an electromotive force; the vibration monitoring and correction assembly is electrically connected to the plurality of vibration detection assemblies respectively to detect the electromotive forces generated by the plurality of vibration detection assemblies, and apply corresponding currents to each vibration detection assembly according to the detection results to ensure the consistency of the vibration of different positions of the voice coil. When the up and down amplitudes of the voice coil are asymmetric, the vibration monitoring and correction assembly adjusts the amplitude of the electrical signals of the plurality of vibration detection assemblies, so that the current passing through the vibration detection assembly 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 voice coil symmetric, and achieving the purpose of improving or enhancing the acoustic performance of the loudspeaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The figure shows a schematic structural diagram of a first implementation manner of a loudspeaker according to an embodiment of the present invention;

[0012] Figure 2 The figure shows a cross-sectional view of a loudspeaker according to an embodiment of the present invention;

[0013] Figure 3 As shown in Figure 2 a partial enlarged view of A in

[0014] Figure 4 The figure shows a schematic structural diagram of a second implementation manner of a loudspeaker according to an embodiment of the present invention;

[0015] Figure 5 As shown in Figure 4 a partial enlarged view of

[0016] Figure 6 The figure shows a schematic structural diagram of a third implementation manner of a loudspeaker according to an embodiment of the present invention;

[0017] Figure 7 As shown in Figure 6 a partial enlarged view of

[0018] Figure 8 The figure shows a schematic structural diagram of a fourth implementation manner of a loudspeaker according to an embodiment of the present invention;

[0019] Figure 9 As shown in Figure 8 a partial enlarged view of

[0020] Figure 10 The figure shows a schematic structural diagram of a fifth implementation manner of a loudspeaker according to an embodiment of the present invention;

[0021] Figure 11 As shown Figure 10 is a partially enlarged view;

[0022] Figure 12 shown is an exploded schematic diagram of a speaker according to an embodiment of the present invention;

[0023] Figure 13 shown is a schematic diagram of the metal wiring of the vibration detection component of a speaker according to an embodiment of the present invention.

[0024] Label description:

[0025] 1. Voice coil; 2. Magnetic circuit component; 3. Vibration detection component; 4. Basin frame; 5. Sound film component. Specific embodiments

[0026] To describe in detail the technical content, the achieved purpose and the effects of the present invention, the following is described in conjunction with the embodiments and with reference to the drawings.

[0027] Please refer to Figures 1 to 13 , a speaker, comprising a voice coil, a magnetic circuit component, a vibration monitoring and correction component and a plurality of vibration detection components;

[0028] The plurality of vibration detection components are arranged at intervals on the voice coil;

[0029] The vibration detection component includes a metal winding, which can cut the magnetic induction lines generated by the magnetic circuit component as the voice coil vibrates to generate an electromotive force;

[0030] The vibration monitoring and correction component is electrically connected to the plurality of vibration detection components respectively to detect the electromotive forces generated by the plurality of vibration detection components, and apply corresponding currents to each vibration detection component according to the detection results to ensure the consistency of the vibration of different positions of the voice coil.

[0031] The working principle of the present invention: When a certain amplitude of electrical signal is applied to the voice coil, the voice coil will drive the vibration system to vibrate up and down. Since the vibration detection component is arranged on the voice coil, the vibration detection component will vibrate together with the voice coil. The vibration detection component is provided with a metal winding, which can cut the magnetic induction lines generated by the magnetic circuit component as the voice coil vibrates to generate an electromotive force E = BLV. The vibration monitoring and correction component is electrically connected to the plurality of vibration detection components respectively to detect the electromotive forces generated by the plurality of vibration detection components.

[0032] When multiple vibration detection components are at the same position height of the magnetic circuit component, the state of cutting the magnetic induction lines of the magnetic circuit component is the same, so the generated real-time motional electromotive force is also the same; when there is rolling / vibrating in the actual vibration system, resulting in inconsistent vibration heights at the four ends of the voice coil, different vibration detection components cut the magnetic induction lines inconsistently, resulting in unequal motional electromotive forces generated. The vibration monitoring and correction component monitors this data difference to obtain the rolling / vibrating state of the micro speaker.

[0033] When the vibration monitoring and correction component monitors that at one or several ends of different vibration detection components on the voice coil, the height is lower or higher, by adjusting the amplitude of the electrical signal of the vibration detection component board on this end of the voice coil, the current passing through the vibration detection component at this end increases or decreases, and the obtained Ampere force F = BIL increases or decreases 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 voice coil are kept consistent, solve the rolling / vibrating, complete real-time correction, reach the balanced state, and thus improve the sound quality effect and reliability margin.

[0034] From the above description, the beneficial effects of the present invention are as follows: A speaker provided by the present invention includes a voice coil, a magnetic circuit component, a vibration monitoring and correction component, and multiple vibration detection components; the vibration detection component includes a metal winding, which can cut the magnetic induction lines generated by the magnetic circuit component as the voice coil vibrates to generate an electromotive force; the vibration monitoring and correction component is electrically connected to the multiple vibration detection components respectively to detect the electromotive forces generated by the multiple vibration detection components, and apply corresponding currents to each vibration detection component according to the detection results to ensure the consistency of the vibration at different positions of the voice coil. When the up and down amplitudes of the voice coil are asymmetric, the vibration monitoring and correction component adjusts the amplitude of the electrical signal of the multiple vibration detection components, so that the current passing through the vibration detection component at this end increases or decreases, and the driving force obtained in the magnetic field, so as to exert an upward or downward acting force for compensation, so that the up and down amplitudes of the voice coil are symmetric, achieving the purpose of improving or enhancing the acoustic performance of the speaker.

[0035] Further, the vibration monitoring and correction component includes a processor and an external power amplifier circuit;

[0036] One end of the external power amplifier circuit is electrically connected to the multiple vibration detection components respectively, and the other end is electrically connected to the processor.

[0037] From the above description, the process of using the external power amplifier circuit to amplify the amplitude of the detected electromotive force and then transmit the signal to the processor for electrical signal analysis and comparison, and sending out corresponding adjustment currents to different vibration detection components through comparison 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 more details will be described here.

[0038] Further, the multiple vibration detection components are arranged at equal intervals on the voice coil.

[0039] As can be seen from the above description, the purpose of arranging the vibration detection components at equal intervals is to better balance the rolling or swaying state of the voice coil; at the same time, it also avoids the phenomenon of the voice coil rolling or swaying caused by the uneven distribution of the vibration detection components on the voice coil.

[0040] Further, the multiple vibration detection components are symmetrically arranged about the center point of the voice coil.

[0041] As can be seen from the above description, the purpose of symmetrically arranging the vibration detection components about the center point of the voice coil is to better balance the rolling or swaying state of the voice coil; at the same time, it also avoids the phenomenon of the voice coil rolling or swaying caused by the uneven distribution of the vibration detection components on the voice coil.

[0042] Further, the distance between the metal winding that makes the vibration detection component generate electromotive force and the magnetic circuit component is equal among the multiple vibration detection components.

[0043] As can be seen from the above description, when the voice coil is not working or the voice coil vibrates normally, the purpose of the equal distance between the metal winding on the voice coil and the magnetic circuit component is to ensure that the electromotive forces generated by different vibration detection components during operation are equal, achieving the purpose of simplifying the correction operation. As long as the corresponding difference calculation is performed, the vibration state can be compared.

[0044] Further, it includes four vibration detection components;

[0045] The four vibration detection components are symmetrically arranged on the voice coil near the corners of the voice coil.

[0046] As can be seen from the above description, the purpose of symmetrically arranging the vibration detection components near the corners of the voice coil is to better balance the rolling or swaying state of the voice coil; at the same time, it also avoids the phenomenon of the voice coil rolling or swaying caused by the uneven distribution of the vibration detection components on the voice coil.

[0047] Further, the vibration detection component is L-shaped;

[0048] One end of the L-shaped vibration detection component is bonded to the inner or outer side of the voice coil; the other end is bonded to the upper end, lower end of the voice coil or the vibration component of the speaker;

[0049] The wiring direction of the metal winding of the vibration detection component bonded to the inner or outer side of the voice coil is perpendicular to the vibration direction of the voice coil.

[0050] As described above, the purpose of designing the vibration detection component into an L shape is to be able to fix the vibration detection component on the voice coil better and more reliably. The wiring direction of the metal winding is perpendicular to the vibration direction of the voice coil, so that the metal winding can effectively cut the magnetic induction lines.

[0051] Further, the vibration detection component is a flexible board;

[0052] A metal wire is wound on the flexible board, and the flexible board wound with the metal wire is folded into an L shape.

[0053] As described above, the design of the flexible board can realize the process of winding first and then forming, which reduces the difficulty of winding.

[0054] Further, the vibration detection component is made of enameled wire wound;

[0055] The enameled wire is wound into a planar voice coil and bent into an L shape.

[0056] As described above, the planar voice coil can increase the number of magnetic induction lines effectively cut by the metal winding, and improve the sensitivity of detecting the vibration imbalance of the voice coil.

[0057] Please refer to Figures 1 to 13 , Embodiment 1 of the present invention is: a loudspeaker, including a voice coil 1, a magnetic circuit component 2, a vibration monitoring and correction component, and a plurality of vibration detection components 3;

[0058] The plurality of vibration detection components 3 are arranged at intervals on the voice coil 1;

[0059] The vibration detection component 3 includes a metal winding, which can cut the magnetic induction lines generated by the magnetic circuit component 2 as the voice coil 1 vibrates to generate an electromotive force;

[0060] The vibration monitoring and correction component is electrically connected to the plurality of vibration detection components 3 respectively to detect the electromotive force generated by the plurality of vibration detection components 3, and apply corresponding currents to each vibration detection component 3 according to the detection results to ensure the consistency of the vibration at different positions of the voice coil 1.

[0061] Please refer to Figure 1 , specifically, the vibration monitoring and correction component includes a processor and an external power amplifier circuit, where the processor can be a CPU or a DSP;

[0062] One end of the external power amplifier circuit is electrically connected to the plurality of vibration detection components 3 respectively, and the other end is electrically connected to the processor.

[0063] Please refer to Figure 1 , Figure 2 , Figure 4 , Figure 6 , Figure 8 andFigure 10 Specifically, the multiple vibration detection components 3 are arranged on the voice coil 1 at equal intervals.

[0064] Please refer to Figure 1 , Figure 2 , Figure 4 , Figure 6 , Figure 8 and Figure 10 Specifically, the distance between the metal winding that causes the vibration detection component 3 to generate an electromotive force in the multiple vibration detection components 3 and the magnetic circuit component 2 is equal.

[0065] Please refer to Figure 3 , Figure 5 , Figure 7 and Figure 9 Specifically, the vibration detection component 3 is L-shaped;

[0066] One end of the L-shaped vibration detection component 3 is bonded to the inner or outer side of the voice coil 1; the other end is bonded to the upper end, lower end of the voice coil 1 or the vibration component of the speaker;

[0067] The wire-walking direction of the metal winding of the vibration detection component 3 bonded to the inner or outer side of the voice coil 1 is perpendicular to the vibration direction of the voice coil 1.

[0068] Please refer to Figure 12 , in this device, the magnetic circuit component 2 is arranged below the chassis 4; the voice coil 1 is arranged above the chassis 4; the sound film component 5 is arranged above the voice coil 1.

[0069] Among them, the magnetic induction lines emitted by the magnetic circuit component 2 are perpendicular to both the vibration direction of the voice coil 1 and the wire-walking direction of the metal winding; the magnetic induction intensity along the vibration direction of the voice coil 1 is different. Specifically, this part of the wire is inserted into the magnetic gap or close to the area with dense magnetic flux, perpendicular to the magnetic induction lines, and is the part for vibration state detection and correction. The other parts of the metal winding are parallel to the magnetic induction lines or far from the area with dense magnetic flux, and have no influence on the vibration state detection and correction. The metal winding on the vibration detection component 3 has incoming and outgoing wires to conduct with external signals.

[0070] Please refer to Figure 13 , specifically, the vibration detection component 3 is a flexible plate;

[0071] The flexible plate is wound with a metal wire, and the flexible plate wound with the metal wire is folded into an L shape.

[0072] Among them, the metal winding has a spiral structure, preferably a rectangular spiral structure.

[0073] Among them, the vibration detection component 3 can also be a flexible circuit board, and the flexible circuit board is printed with asFigure 11 Metal traces.

[0074] Please refer to Figure 1 , Figure 2 , Figure 4 , Figure 6 , Figure 8 and Figure 10 , the second embodiment of the present invention is: The difference between this embodiment and the first embodiment lies in the different arrangement of the vibration detection components 3. Specifically, the plurality of vibration detection components 3 are symmetrically arranged about the center point of the voice coil 1.

[0075] Please refer to Figure 1 , Figure 2 , Figure 4 , Figure 6 , Figure 8 and Figure 10 , the third embodiment of the present invention is: On the basis of the first or second embodiment, preferably, the vibration detection component 3 includes four;

[0076] The four vibration detection components 3 are respectively symmetrically arranged at the corners of the voice coil 1 close to the voice coil.

[0077] The fourth embodiment of the present invention is: On the basis of the first or second or third embodiment, preferably, the vibration detection component 3 is wound with enameled wire;

[0078] The enameled wire is wound into a planar voice coil and bent into an L shape.

[0079] In summary, a loudspeaker provided by the present invention includes a voice coil, a magnetic circuit assembly, a vibration monitoring and correction assembly, and a plurality of vibration detection assemblies; the vibration detection assembly includes a metal winding, which can cut the magnetic induction lines generated by the magnetic circuit assembly as the voice coil vibrates to generate an electromotive force; the vibration monitoring and correction assembly is electrically connected to the plurality of vibration detection assemblies respectively to detect the electromotive forces generated by the plurality of vibration detection assemblies, and apply corresponding currents to each vibration detection assembly according to the detection results to ensure the consistency of the vibration of different positions of the voice coil. When the up-and-down amplitude of the voice coil is asymmetric, the amplitude of the detected electromotive force is amplified by using an external power amplifier circuit and the signal is transmitted to the processor for electrical signal analysis and comparison. After comparison, corresponding adjustment currents are sent to different vibration detection assemblies, so that the vibration detection assemblies at this end obtain a driving force in the magnetic field by increasing or decreasing the current, thereby exerting an upward or downward acting force for compensation, making the up-and-down amplitude of the voice coil symmetric; further, the vibration detection assembly is designed in an L shape to be able to fix the vibration detection assembly on the voice coil better and more reliably. Secondly, the wiring direction of the metal winding is perpendicular to the vibration direction of the voice coil, aiming at enabling the metal winding to effectively cut the magnetic induction lines and improving the sensitivity of detecting the vibration imbalance of the voice coil. The loudspeaker designed in this way can automatically adjust the rolling vibration and swaying yaw of the vibration assembly, and improve the sound transmission quality of the loudspeaker.

[0080] 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 content of the specification and drawings of the present invention, or directly or indirectly applied in the related technical field, shall be equally included in the patent protection scope of the present invention.

Claims

1. A loudspeaker, characterized in that, It includes a voice coil, a magnetic circuit assembly, a vibration monitoring and correction assembly, and multiple vibration detection assemblies; The multiple vibration detection assemblies are arranged at intervals on the voice coil; The vibration detection assembly includes a metal winding, which can cut the magnetic induction lines generated by the magnetic circuit assembly as the voice coil vibrates to generate an electromotive force; The vibration monitoring and correction assembly is electrically connected to the multiple vibration detection assemblies respectively to detect the electromotive forces generated by the multiple vibration detection assemblies, and apply corresponding currents to each vibration detection assembly according to the detection results to ensure the consistency of the vibration at different positions of the voice coil; The vibration detection assembly is L-shaped; One end of the L-shaped vibration detection assembly is bonded to the inner or outer side of the voice coil; the other end is bonded to the upper end, lower end of the voice coil or the vibration assembly of the speaker; The wiring direction of the metal winding of the vibration detection assembly bonded to the inner or outer side of the voice coil is perpendicular to the vibration direction of the voice coil.

2. The loudspeaker according to claim 1, wherein The vibration monitoring and correction assembly includes a processor and an external power amplifier circuit; One end of the external power amplifier circuit is electrically connected to the multiple vibration detection assemblies respectively, and the other end is electrically connected to the processor.

3. A loudspeaker according to claim 1, characterized in that, The multiple vibration detection assemblies are arranged equidistantly on the voice coil.

4. A loudspeaker according to claim 1, characterized in that, The multiple vibration detection assemblies are symmetrically arranged about the center point of the voice coil.

5. A loudspeaker according to claim 1 or 3 or 4, characterized in that, The distances between the metal windings that cause the vibration detection assemblies to generate electromotive forces in the multiple vibration detection assemblies are equal.

6. A loudspeaker according to claim 5, wherein It includes four vibration detection assemblies; The four vibration detection assemblies are symmetrically arranged on the voice coil near the corners of the voice coil.

7. A loudspeaker according to claim 1, characterized in that, The vibration detection assembly is a flexible board; A metal wire is wound on the flexible board, and the flexible board wound with the metal wire is folded into an L shape.

8. A loudspeaker according to claim 1, characterized in that, The vibration detection assembly is made of enameled wire wound; The enameled wire is wound into a planar voice coil and bent into an L shape.

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