CN110662139B - Sound production device and auxiliary vibration method - Google Patents
Sound production device and auxiliary vibration method Download PDFInfo
- Publication number
- CN110662139B CN110662139B CN201910944216.6A CN201910944216A CN110662139B CN 110662139 B CN110662139 B CN 110662139B CN 201910944216 A CN201910944216 A CN 201910944216A CN 110662139 B CN110662139 B CN 110662139B
- Authority
- CN
- China
- Prior art keywords
- voice coil
- auxiliary
- vibration
- vibrating
- driving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
- H04R9/066—Loudspeakers using the principle of inertia
Abstract
The invention provides a sound generating device, comprising: the vibration component comprises a vibration component, a magnetic circuit system and at least one auxiliary vibration structure, wherein the auxiliary vibration structure comprises a driving part, and the driving part is arranged on the vibration component; the driving part is configured to be capable of being communicated with an auxiliary signal, and the magnetic circuit system is configured to be capable of generating an electromagnetic driving force for the driving part communicated with the auxiliary signal. The invention also provides an auxiliary vibration method of the miniature sound production device. According to the technical scheme, the identification signal is generated by identifying the amplitude of the vibration component, the auxiliary signal capable of improving the polarization of the vibration component is introduced into the auxiliary vibration structure according to the identification signal, the polarization condition of the vibration component is improved in a targeted manner, the polarization problem of the loudspeaker can be solved, the tone quality of the loudspeaker is improved, the user experience is improved, and the polarization improvement efficiency and the polarization improvement effect are improved obviously.
Description
Technical Field
The invention relates to the technical field of loudspeakers, in particular to a sound production device and an auxiliary vibration method.
Background
A speaker is a basic sound-emitting unit that converts an electrical signal into an acoustic signal. With the development of the mobile communication equipment industry, the micro speaker industry is rapidly developed, and the requirements on the performance of the micro speaker are higher and higher.
Be equipped with vibration system and magnetic circuit in the speaker, wherein, vibration system includes voice coil loudspeaker voice coil and vibrating diaphragm, and after the voice coil loudspeaker voice coil switch-on current, under magnetic circuit magnetic field effect atress vibration, the voice coil loudspeaker voice coil vibration drives the vibrating diaphragm vibration sound production. The diaphragm is susceptible to polarization from air currents in the micro-speaker during vibration. Polarization is manifested as a non-uniform magnitude of displacement across the plane of the diaphragm in the direction of vibration. Although polarization is a common phenomenon in the speaker industry, polarization of the diaphragm causes many problems, such as stress concentration of the diaphragm, fatigue and even breakage of a local area of the diaphragm due to excessive stress, or inclination of the voice coil in the magnetic gap and rubbing against the magnetic circuit. The polarization phenomenon can also cause poor listening, damage to the sound quality and poor user experience.
In order to improve the polarization of the loudspeaker, a centering disk or a damping glue is usually applied to achieve the aim. Although both methods have some effect on polarization improvement, they passively improve polarization and cannot make proper vibration correction according to the polarization point and the actual polarization magnitude.
Therefore, it is necessary to provide a structure capable of actively improving polarization for the actual polarization condition of the speaker, so as to avoid the problems caused by the polarization of the diaphragm.
Disclosure of Invention
An object of the present invention is to provide a sound generating device to solve the problems caused by the polarization of the diaphragm.
Another object of the present invention is to provide a method of assisting vibration of a sound generating device.
A sound generating device comprising:
the vibration component comprises a voice coil and a vibrating diaphragm, the edge of the vibrating diaphragm is fixed in the sound production device, the voice coil is connected to the vibrating diaphragm, and the voice coil is configured to be capable of being fed with an audio electrical signal;
the magnetic circuit system is provided with a magnetic gap, the voice coil is positioned in the magnetic gap, and the magnetic circuit system is configured to generate an electromagnetic driving force for the voice coil which is introduced with an audio electric signal so as to enable the voice coil and the diaphragm to vibrate;
at least one auxiliary vibrating structure comprising a drive portion disposed on the vibrating assembly;
the driving part is configured to be capable of being communicated with an auxiliary signal, and the magnetic circuit system is configured to be capable of generating an electromagnetic driving force for the driving part communicated with the auxiliary signal.
Optionally, the driving portion is located at a position of the voice coil connected to the diaphragm;
or the driving part is positioned at the position of the voice coil far away from the diaphragm.
Optionally, the vibration assembly further comprises a centering branch piece, and the driving part is arranged on the centering branch piece.
Optionally, the sound generating device includes two auxiliary vibration structures, and the two auxiliary vibration structures are distributed in central symmetry with respect to the center of the voice coil.
Furthermore, the sound generating device comprises four auxiliary vibration structures, and along the annular direction of the voice coil, two non-adjacent auxiliary vibration structures are distributed in a central symmetry mode relative to the center of the voice coil.
Optionally, the driving portion is disposed on the voice coil, and the driving portion includes a first surrounding portion connected to a side surface of the voice coil.
Optionally, the driving portion further includes a second surrounding portion, the second surrounding portion is connected to the end face of the voice coil, and the second surrounding portion constitutes a flanging structure of the first surrounding portion.
Optionally, the auxiliary vibration structure further comprises at least one supporting portion, the supporting portion is fixedly connected in the sound generating device, and the supporting portion is connected with the driving portion; the support portion is configured to pass an auxiliary signal to the driving portion.
Optionally, each of the auxiliary vibration structures includes two support portions, the two support portions are respectively connected to two ends of the driving portion, and the two support portions are symmetrically disposed with respect to the driving portion.
Optionally, the auxiliary vibrating structure has a flexible circuit board, and the flexible circuit board constitutes the supporting portion.
Optionally, the flexible circuit board forms a part of the structure of the driving portion, an auxiliary line is disposed on the structure of the flexible circuit board for forming the driving portion, and the flexible circuit board is configured to pass an auxiliary signal to the auxiliary line.
Optionally, the flexible circuit board is configured to pass audio electrical signals to the voice coil.
An auxiliary vibration method of a sound generating device comprises the following steps:
starting a sound production device to produce sound by vibration;
identifying the amplitude of the vibration component at the position provided with the auxiliary vibration structure to generate an identification signal;
the control chip judges the degree of the amplitude of the vibration assembly at the position provided with the auxiliary vibration structure deviating from a set value according to the identification signal;
the control chip outputs compensation excitation current to the auxiliary vibration structure according to the judgment result;
and electromagnetic acting force is generated between the auxiliary vibration structure and the magnetic circuit system, and the compensation is formed on the amplitude of the vibration component.
Further, when the amplitude of the vibration assembly is smaller than a set value, the control chip outputs compensation excitation current in the same direction as the current in the voice coil;
or when the amplitude of the vibration assembly is larger than a set value, the control chip outputs compensation excitation current in the direction opposite to the current direction in the voice coil.
The technical scheme of the invention has the beneficial effects that: the vibration amplitude of the vibration component is identified to generate an identification signal, and an auxiliary signal capable of improving the polarization of the vibration component is introduced into the auxiliary vibration structure according to the identification signal, so that the polarization condition of the vibration component is improved in a targeted manner. This technical scheme not only can solve the polarization problem of speaker, improves speaker tone quality, improves user experience, and it has obvious raising the effect to polarization improvement efficiency and improvement effect moreover.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is an exploded view of a sound generating device according to an embodiment of the present invention;
fig. 2 is a schematic view of an auxiliary vibration structure of a sound generating apparatus according to an embodiment of the present invention;
the figures are labeled as follows: 11-a diaphragm; 12-a voice coil; 21-a magnetic gap; 3-auxiliary vibration structure; 31-a drive section; 311-a first enclosure; 312-a second enclosure; 32-support part.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
A speaker, which is a basic sound generating unit that converts an electric signal into an acoustic signal, is provided with a vibration system and a magnetic circuit system. The vibration system comprises a voice coil and a vibrating diaphragm, after the voice coil is switched on, the voice coil is stressed to vibrate under the action of the magnetic circuit system, and the voice coil vibrates to drive the vibrating diaphragm to vibrate and produce sound. In practical application, the diaphragm is easy to polarize during vibration. Polarization causes many problems, and therefore, improvement of polarization is necessary.
The invention provides a sound generating device, which comprises a vibration assembly, wherein the vibration assembly comprises a voice coil 12 and a vibrating diaphragm 11 as shown in figure 1. In the technical scheme of the invention, the vibrating diaphragm is fixed in the sound generating device through the edge of the vibrating diaphragm. Optionally, the edge of the diaphragm is fixed to the housing of the sound emitting device. The voice coil loudspeaker voice coil and the vibrating diaphragm of vibration subassembly are connected, and both can vibrate in step.
The sound generating device of the present invention further comprises a magnetic circuit system in which a magnetic gap 21 is formed. When the sound generating device is assembled, the voice coil is placed in the magnetic gap 21.
In actual use, an audio electric signal is introduced into the voice coil. In one embodiment of the present invention, the magnetic circuit system includes at least one magnet, and the magnetic field generated by the magnet exerts a force on the voice coil 12 to which the audio electrical signal is applied, so that the voice coil vibrates. Since the diaphragm 11 is connected to the voice coil, when the voice coil 12 vibrates, the diaphragm vibrates together with the voice coil. An audio electric signal is introduced into the voice coil, and the magnet forms an electromagnetic driving force for the voice coil. Preferably, the magnetic circuit system may include a central magnet and a plurality of side magnets to form a more nearly uniform magnetic field, so that the voice coil is more uniformly stressed in the magnetic field.
The sound generating device of the present invention further comprises at least one auxiliary vibrating structure 3. As shown in fig. 2, the auxiliary vibration structure is provided with a driving portion 31, which is provided on the vibration unit in use. As an embodiment of the present invention, the driving part may be disposed on the voice coil, and the driving part may be disposed to be fixedly connected or contact-connected with the voice coil. Here, the driver is only required to be able to transmit the motion form to the voice coil 12. Alternatively, the driving portion may be provided on another structure of the vibration assembly. When the auxiliary vibration structure is applied, an auxiliary signal is introduced into the driving part, and at the moment, the magnetic field of the magnetic circuit system generates electromagnetic driving force on the driving part, so that the auxiliary vibration structure is driven to generate vibration similar to that of the voice coil.
In practical applications, the vibration of the diaphragm 11 is usually accompanied by polarization, depending on the structure of the sound generating device or the air flow. Polarization causes problems such as diaphragm cracking, poor listening, etc. An object of the present invention is to improve the polarization of a diaphragm by using the vibration generated by the auxiliary vibration structure, so as to alleviate or even solve various problems caused by polarization. The vibration improvement structure has a simple polarization improvement mode and a good improvement effect.
Alternatively, the driving part may be disposed at a connection of the voice coil and the diaphragm; alternatively, the driving portion may be disposed at a position where the voice coil is far from the diaphragm. The present invention is not limited to the installation position of the driving part, and those skilled in the art can select an appropriate installation position of the driving part relative to the voice coil according to actual needs.
Optionally, the vibration assembly further comprises a centering support, and the driving part of the auxiliary vibration structure may be disposed on the centering support. The centering support piece comprises a fixing part connected with the shell of the sound generating device and a vibrating part connected with the voice coil. The driving part is arranged on the centering disk and close to the voice coil. The centering support is internally provided with a circuit which is connected with the voice coil and used for leading in an audio-frequency electric signal to the voice coil, and the centering support vibrates together with the voice coil when in use and is used for adjusting the polarization of the vibrating diaphragm. And a circuit which is connected with the driving part and used for introducing auxiliary signals into the auxiliary vibration structure is laid in the centering support piece. When the vibration-assisting mechanism is used, an auxiliary signal is introduced into the driving part of the auxiliary vibration structure through the centering support sheet, and the driving part can generate vibration for improving the polarization of the vibration film.
A centering support is arranged in the sound generating device, so that the vibration direction of the vibrating diaphragm can be adjusted, and the polarization is inhibited through mechanical restoring force. The auxiliary vibration structure arranged on the centering branch sheet can further strengthen the polarization inhibition effect on the vibrating diaphragm and strengthen the polarization inhibition effect.
As an embodiment of the present invention, the sound generating apparatus includes two auxiliary vibrating structures 3, which are arranged in a central symmetry with respect to the center of the voice coil 12.
The mode of arranging of above-mentioned supplementary vibration structure can not make the voice coil loudspeaker voice coil produce the torsion of vertical direction improving polarization in-process, avoids the vibration subassembly to produce the motion of other forms except vibration, and then causes other problems such as structural strength reduction.
As shown in fig. 1, as an embodiment of the present invention, the sound generating apparatus includes four auxiliary vibrating structures 3, and two non-adjacent auxiliary vibrating structures are distributed in a central symmetry manner with respect to the center of the voice coil along the annular direction of the voice coil 12.
A plurality of auxiliary vibration structures are arranged along the voice coil, so that the polarization conditions of a plurality of positions of the vibration assembly can be improved, and the polarization improvement effect is enhanced.
The voice coil 12 may be provided in a rectangular ring structure, and the driving portion 31 of the auxiliary vibrating structure 3 is provided corresponding to a corner position of the voice coil. Furthermore, two auxiliary vibration structures are arranged along two corners of a certain diagonal line of the rectangular voice coil; alternatively, four auxiliary vibration structures are provided along all corners of the rectangular voice coil. Therefore, the auxiliary vibration structure can be prevented from generating redundant acting force on the voice coil, and the polarization of a plurality of corners of the rectangular voice coil can be improved.
Further, the shape of the driving portion 31 is an arc-shaped structure, which matches the shape of the corner position of the voice coil 12. When the auxiliary vibration structure 3 is manufactured, the driving part 31 is processed into a shape matched with the corner of the voice coil, the connection reliability of the auxiliary vibration structure and the voice coil can be improved by the arrangement mode, meanwhile, the smoothness of acting force transmission between the auxiliary vibration structure and the voice coil is improved, and the deformation of the auxiliary vibration structure and the voice coil is avoided.
Alternatively, the driving portion is disposed on the voice coil, and the driving portion 31 includes a first surrounding portion 311 connected to a side surface of the voice coil 12. The arc-shaped structure of the first surrounding part is adaptive to the shape of the side face of the voice coil. And an auxiliary signal is introduced into the driving part, so that the driving part generates vibration under the action of the magnetic circuit system, and the polarization of the vibrating diaphragm is improved through the vibration of the driving part.
Alternatively, the driving part 31 includes a first surrounding part 311 and a second surrounding part 312. The first surrounding part and the second surrounding part are both arc-shaped structures and have the same bending direction. Further, the first surrounding portion is a burring structure formed on the second surrounding portion, or the second surrounding portion is a burring structure formed on the first surrounding portion. In one embodiment of the present invention, the first enclosure portion is connected to a side surface of the voice coil, and the second enclosure portion is connected to an end surface of the voice coil.
In actual use, the magnetic circuit system generates an electromagnetic driving force for the auxiliary vibration structure, and the driving portion 31 can form an acting force perpendicular to the end face of the voice coil on the voice coil through the second surrounding portion 312, so that the acting force of the first surrounding portion 311 connected with the side face of the voice coil is reduced, and the structural stability of the driving portion is improved.
Optionally, the auxiliary vibrating structure for improving polarization of the vibrating assembly further comprises at least one supporting portion 32 fixedly coupled in the sound emitting device. As an embodiment, the support portion may be connected to a housing of the sound emitting device. Or the support portion may be connected to other components in the sound generating device, which is not limited in the present invention. The supporting part is connected with the driving part and is used for introducing auxiliary signals to the driving part. The support portion may also serve to provide support for the driving portion 31 so that the auxiliary vibrating structure can be maintained to be centrosymmetric with respect to the center of the voice coil.
Further, as shown in fig. 2, each auxiliary vibrating structure 3 includes two supporting portions 32, which are respectively connected to both ends of the driving portion. For example, two support portions may extend from both ends of the driving portion 31, and be arranged symmetrically with respect to the center line of the driving portion.
The two support portions 32 symmetrically arranged along the central line of the driving portion 31 play a role in stably supporting the driving portion, and simultaneously reduce the difference of the auxiliary signals transmitted from the two support portions.
Further, the support portion 32 is configured as a right-angle bent structure connected to the driving portion 31, and the areas surrounded by the right angles of the two bent structures are away from each other. One end of the right-angle bending structure, which is far away from the driving part, is connected with a supporting leg. The auxiliary vibration structure is connected to the sound generating device through the supporting legs. Preferably, the supporting feet are provided as pads, which are connected with welding points provided on the sound-generating device. Thus, the sound generating device can transmit the auxiliary signal to the supporting part through the pad connected to the pad. The supporting part is used as a transmission path of the auxiliary signal, and transmits the signal to the driving part, so that the magnetic circuit system is prompted to generate electromagnetic driving acting force on the driving part which is introduced with the auxiliary signal.
The support portion 32 is formed in a right-angled bent structure, and the purpose thereof is to provide an installation space for the edge magnet of the sound generating device, and the shape thereof can be adapted to the shape of the edge magnet.
Optionally, the auxiliary vibrating structure has a flexible circuit board, and the flexible circuit board constitutes the supporting portion.
Alternatively, the support portion 32 may be provided as a composite material with an inner layer of conductive and an outer layer of insulative material. As an embodiment of the invention, the material of the supporting part can be set to be a composite material with an inner core made of copper and an outer layer coated with insulating glue and PI.
The supporting portion 32 is formed in a multi-layer composite structure, which not only can realize the conductive function of the supporting portion, but also can prevent the short circuit phenomenon of the component accidentally contacted with the supporting portion. Meanwhile, the insulating material of the outer layer has a good protection effect on the conductive core layer.
Optionally, the flexible circuit board forms a part of the structure of the driving portion, an auxiliary line is disposed on the structure of the flexible circuit board for forming the driving portion, and the flexible circuit board is configured to pass an auxiliary signal to the auxiliary line.
Specifically, as an embodiment of the present invention, the flexible circuit board constitutes a support portion of the auxiliary vibrating structure, and the second surrounding portion of the driving portion, and the auxiliary wiring on the flexible circuit board constitutes a first surrounding portion of the driving portion. Alternatively, the auxiliary circuit may be a coil. The flexible circuit board can feed an auxiliary signal into the auxiliary line, and the auxiliary signal is used for driving the auxiliary vibration structure to generate movement capable of improving the polarization of the vibration film.
Optionally, the flexible circuit board is configured to pass audio electrical signals to the voice coil.
In particular, two signal transmission paths may exist in the flexible circuit board. Wherein signal transmission route and voice coil loudspeaker voice coil intercommunication all the way for lead-in audio frequency signal of telecommunication in to the voice coil loudspeaker voice coil from the external world, make the voice coil loudspeaker voice coil produce the vibration, then drive the vibrating diaphragm vibration and make sound generating mechanism sound production. And the other signal transmission passage is communicated with the first surrounding part and is used for introducing an auxiliary signal into the auxiliary vibration structure from the outside so that the auxiliary vibration structure generates vibration capable of improving the polarization of the vibrating diaphragm.
Optionally, the material of the first surrounding portion is a conductive material. The auxiliary signal input at this time is an electric signal. Furthermore, the material of the driving part can be copper or copper alloy, and can also be silver or silver alloy with better conductivity, and the invention is not limited to this, namely, the driving part is only required to realize the conductive function, and the driving part can be selected according to the conductive performance of the material in practical application. Alternatively, the first enclosure may be provided as a coil.
When the auxiliary vibration structure is actually used, the driving portion 31 is connected with the voice coil to improve the polarization of the vibration assembly, and short circuit occurs due to conduction between the driving portion and the voice coil, so that an insulating material is required to be arranged at the joint of the driving portion and the voice coil to isolate the driving portion from the voice coil.
The invention also provides an auxiliary vibration method of the sound generating device, which comprises the following steps: an electric signal is introduced into the vibration assembly, and the vibration assembly vibrates under the action of a magnetic field of the magnetic circuit system, so that the sound production device produces sound; identifying the amplitude of the vibration component at the position provided with the auxiliary vibration structure, such as the amplitude of the vibration diaphragm corresponding to four corners of the voice coil 12, and then generating an identification signal; the control chip judges the degree of the deviation of the amplitude of the vibration assembly at the position provided with the auxiliary vibration structure 3 from a set value according to the identification signal; the control chip outputs compensation excitation current to the auxiliary vibration structure according to the judgment result; and electromagnetic acting force is generated between the auxiliary vibration structure and the magnetic circuit system, and the compensation is formed on the amplitude of the vibration component.
Specifically, the method for identifying the degree of the deviation of the amplitude from the set value includes charge identification between capacitor plates, light induction identification, and the like.
The auxiliary vibration method can effectively identify the polarization condition of the sounding device. And then, outputting an excitation current to the auxiliary vibration structure by using a control chip according to the actual polarization condition, and improving the polarization through the motion of the auxiliary vibration structure. The method can change the traditional passive identification into active identification, and compensates for the magnitude of the polarization amplitude, thereby effectively improving the polarization improvement efficiency and having better improvement effect.
In practical application, the standard amplitude of each vibration is preset to be +/-a. The cases of the deviation of the amplitude from the set value recognized by the recognition device include four cases (the preset vibration component vibrates upwards with an amplitude of + b, and vibrates downwards with an amplitude of-c):
1)﹢b＞﹢a，-c≥-a；
2)﹢b≥﹢a，-c＜-a；
3)﹢a＞﹢b，-c≥-a；
4)﹢a≥﹢b，-c＜-a；
when no signal is fed to the voice coil 12, the amplitude of the vibration assembly is 0.
Further, when the amplitude of the vibration assembly is smaller than a set value, the control chip outputs compensation excitation current in the same direction as the current in the voice coil;
or when the amplitude of the vibration assembly is larger than a set value, the control chip outputs compensation excitation current in the direction opposite to the current direction in the voice coil.
Specifically, for the case 1), when the vibration assembly vibrates upwards, the control chip outputs a compensation excitation current in a direction opposite to that of the current in the voice coil to the auxiliary vibration structure, and the auxiliary vibration structure is subjected to an electromagnetic acting force in the magnetic circuit system and drives the vibration assembly to move downwards; when the vibration component vibrates downwards, the control chip outputs compensation excitation current in the same direction as the current in the voice coil to the auxiliary vibration structure, and the auxiliary vibration structure exerts electromagnetic acting force in the magnetic circuit system to drive the vibration component to move downwards; when-c is equal to-a, the compensating excitation current in the auxiliary vibrating structure is 0.
For the case 2), when the vibration assembly vibrates upwards, the control chip outputs compensation excitation current with the direction opposite to that of current in the voice coil to the auxiliary vibration structure, and the auxiliary vibration structure is subjected to electromagnetic acting force in the magnetic circuit system and drives the vibration assembly to move downwards; when the vibration component vibrates downwards, the control chip outputs compensation excitation current with the direction opposite to that of current in the voice coil to the auxiliary vibration structure, and the auxiliary vibration structure exerts electromagnetic acting force in the magnetic circuit system to drive the vibration component to move upwards; when + b equals + a, the compensation excitation current in the auxiliary vibrating structure is 0.
For the case 3), when the vibration assembly vibrates upwards, the control chip outputs compensation excitation current in the same direction as the current in the voice coil to the auxiliary vibration structure, and the auxiliary vibration structure is subjected to electromagnetic acting force in the magnetic circuit system and drives the vibration assembly to move upwards; when the vibration component vibrates downwards, the control chip outputs compensation excitation current in the same direction as the current in the voice coil to the auxiliary vibration structure, and the auxiliary vibration structure exerts electromagnetic acting force in the magnetic circuit system to drive the vibration component to move downwards; when-c is equal to-a, the compensating excitation current in the auxiliary vibrating structure is 0.
For the case 4), when the vibration assembly vibrates upwards, the control chip outputs compensation excitation current in the same direction as the current in the voice coil to the auxiliary vibration structure, and the auxiliary vibration structure is subjected to electromagnetic acting force in the magnetic circuit system and drives the vibration assembly to move upwards; when the vibration component vibrates downwards, the control chip outputs compensation excitation current with the direction opposite to that of current in the voice coil to the auxiliary vibration structure, and the auxiliary vibration structure exerts electromagnetic acting force in the magnetic circuit system to drive the vibration component to move upwards; when + b equals + a, the compensation excitation current in the auxiliary vibrating structure is 0.
The magnitude and direction of the electromagnetic driving force applied to the auxiliary vibrating structure are determined by the magnitude and direction of the current input thereto.
As another embodiment of the present invention, an allowable deviation value of the vibration assembly may be set. Namely, when the amplitude of the vibration component is compared with the set standard amplitude, the difference value of the amplitude of the vibration component and the standard amplitude is within the allowable deviation range, and the polarization of the vibration component is not corrected.
The setting of the allowable deviation value can reduce the polarization correction times of the vibration component on the premise of ensuring good sound quality of the loudspeaker, and further reduce the use cost of the loudspeaker.
In summary, according to the technical scheme adopted by the invention, the identification signal is generated by identifying the amplitude of the vibration component, and the auxiliary signal capable of improving the polarization of the vibration component is introduced into the auxiliary vibration structure according to the identification signal, so that the polarization condition of the vibration component is improved in a targeted manner. The auxiliary vibration structure is matched with an auxiliary vibration method to obviously improve the polarization improvement efficiency and the polarization improvement effect. This technical scheme has still solved the polarization problem of speaker and the short-lived problem of vibrating diaphragm that the polarization brought, improves speaker tone quality, improves user experience, prolongs the life of speaker.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (12)
1. A sound generating device, comprising:
the vibration assembly comprises a voice coil and a vibrating diaphragm, the edge of the vibrating diaphragm is fixed in the sound production device, the voice coil is connected to the vibrating diaphragm, and the voice coil is configured to be capable of being fed with an audio electrical signal;
the magnetic circuit system is provided with a magnetic gap, the voice coil is positioned in the magnetic gap, and the magnetic circuit system is configured to generate an electromagnetic driving force for the voice coil which is introduced with an audio electric signal so as to enable the voice coil and the diaphragm to vibrate;
at least one auxiliary vibrating structure comprising a drive portion disposed on the vibrating assembly;
the driving part is configured to be capable of being communicated with an auxiliary signal, and the magnetic circuit system is configured to be capable of generating an electromagnetic driving force for the driving part communicated with the auxiliary signal;
the vibration component further comprises a centering branch piece, and the driving part is arranged on the centering branch piece;
the driving part is positioned at the position of the voice coil, which is connected with the vibrating diaphragm;
or the driving part is positioned at the position of the voice coil far away from the diaphragm.
2. The apparatus according to claim 1, wherein said apparatus comprises two of said secondary vibrating structures, and said two secondary vibrating structures are arranged in a central symmetry with respect to a center of said voice coil.
3. The apparatus according to claim 1, wherein the apparatus comprises four of the secondary vibrating structures, and two of the secondary vibrating structures that are not adjacent to each other are arranged in a central symmetry manner with respect to a center of the voice coil along a circumferential direction of the voice coil.
4. The apparatus according to claim 1, wherein said driving portion is disposed on said voice coil, said driving portion including a first surrounding portion, said first surrounding portion being connected to a side surface of said voice coil.
5. The sound generating apparatus according to claim 4, wherein the driving portion further includes a second surrounding portion connected to an end surface of the voice coil, the second surrounding portion constituting a flange structure of the first surrounding portion.
6. The sound generating apparatus according to claim 1, wherein the auxiliary vibrating structure further comprises at least one support portion, the support portion is fixedly connected to the sound generating apparatus, and the support portion is connected to the driving portion; the support portion is configured to pass an auxiliary signal to the driving portion.
7. The sound generating apparatus according to claim 6, wherein each of the auxiliary vibrating structures includes two of the supporting portions, the two supporting portions are respectively connected to both ends of the driving portion, and the two supporting portions are symmetrically disposed with respect to the driving portion.
8. The sound generating apparatus according to claim 6, wherein the auxiliary vibrating structure has a flexible circuit board, the flexible circuit board constituting the support portion.
9. The sound generating apparatus according to claim 8, wherein the flexible circuit board forms a part of the structure of the driving portion, and an auxiliary line is disposed on the structure of the flexible circuit board for forming the driving portion, and the flexible circuit board is configured to supply an auxiliary signal to the auxiliary line.
10. The apparatus according to claim 9, wherein said flexible circuit board is configured for passing audio electrical signals to said voice coil.
11. A method of assisting vibration of a sound generating apparatus according to any one of claims 1 to 10, comprising the steps of:
starting a sound production device to produce sound by vibration;
identifying the amplitude of the vibration component at the position provided with the auxiliary vibration structure to generate an identification signal;
the control chip judges the degree of the amplitude of the vibration assembly at the position provided with the auxiliary vibration structure deviating from a set value according to the identification signal;
the control chip outputs compensation excitation current to the auxiliary vibration structure according to the judgment result;
and electromagnetic acting force is generated between the auxiliary vibration structure and the magnetic circuit system, and the compensation is formed on the amplitude of the vibration component.
12. The method of claim 11, wherein when the amplitude of the vibration component is smaller than a predetermined value, the control chip outputs a compensation excitation current having the same direction as the current in the voice coil;
or when the amplitude of the vibration assembly is larger than a set value, the control chip outputs compensation excitation current in the direction opposite to the current direction in the voice coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910944216.6A CN110662139B (en) | 2019-09-30 | 2019-09-30 | Sound production device and auxiliary vibration method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910944216.6A CN110662139B (en) | 2019-09-30 | 2019-09-30 | Sound production device and auxiliary vibration method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110662139A CN110662139A (en) | 2020-01-07 |
| CN110662139B true CN110662139B (en) | 2022-03-11 |
Family
ID=69039973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910944216.6A Active CN110662139B (en) | 2019-09-30 | 2019-09-30 | Sound production device and auxiliary vibration method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110662139B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111954131A (en) * | 2020-06-30 | 2020-11-17 | 瑞声新能源发展(常州)有限公司科教城分公司 | Flexible circuit board and speaker |
| CN112492464B (en) * | 2020-12-09 | 2022-03-25 | 歌尔股份有限公司 | Speaker and electronic apparatus |
| CN114501248A (en) * | 2021-12-27 | 2022-05-13 | 浙江旗声电子科技股份有限公司 | Special-shaped support piece and ultrathin loudspeaker |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109587609A (en) * | 2018-11-06 | 2019-04-05 | 歌尔股份有限公司 | Sounding device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110164781A1 (en) * | 2008-10-27 | 2011-07-07 | Pioneer Corporation | Magnetic circuit for speaker device and speaker device |
| CN105723742A (en) * | 2013-11-06 | 2016-06-29 | 丹麦技术大学 | Loudspeaker assembly with suppression of magnetic flux modulation distortion |
| CN106792400A (en) * | 2017-03-16 | 2017-05-31 | 深圳精拓创新科技有限公司 | Loudspeaker and the method for reducing loudspeaker total harmonic distortion |
| DE102018002290A1 (en) * | 2017-03-27 | 2018-09-27 | Sound Solutions International Co., Ltd. | A system and method for applying a sound signal to a multi-coil electrodynamic acoustic transducer |
| CN109068247A (en) * | 2018-08-07 | 2018-12-21 | 张永春 | Multiple engine array system and loudspeaker |
| CN108882129B (en) * | 2018-09-21 | 2021-04-02 | 歌尔股份有限公司 | Circuit board, loudspeaker, electronic equipment and polarization compensation method |
| CN109862478A (en) * | 2019-03-27 | 2019-06-07 | 深圳市信维声学科技有限公司 | A kind of Microspeaker |
-
2019
- 2019-09-30 CN CN201910944216.6A patent/CN110662139B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109587609A (en) * | 2018-11-06 | 2019-04-05 | 歌尔股份有限公司 | Sounding device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110662139A (en) | 2020-01-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110662139B (en) | Sound production device and auxiliary vibration method | |
| CN109587610B (en) | Sound converter | |
| CN110177322B (en) | Screen sound production exciter and electronic equipment | |
| US11778386B2 (en) | Sound production device and electronic apparatus therefor | |
| EP2725820B1 (en) | Vibration module for sound transducer | |
| US11206492B2 (en) | Screen sounding exciter and electronic device | |
| CN110881160A (en) | Sound production device | |
| US11722824B2 (en) | Sound production device and assembling method therefor | |
| US20110116662A1 (en) | Speaker device | |
| CN109275073B (en) | Loudspeaker and assembling method thereof | |
| EP1881732A1 (en) | Magnetic membrane suspension | |
| TWM607577U (en) | High dynamic balancing speaker | |
| CN209017298U (en) | Loudspeaker | |
| CN102273228B (en) | Multifunctional micro-speaker | |
| CN209017297U (en) | Loudspeaker | |
| WO2023115826A1 (en) | Sound production device and electronic device | |
| CN211531307U (en) | Loudspeaker | |
| CN209017296U (en) | Loudspeaker | |
| WO2022000632A1 (en) | Flexible circuit board and loudspeaker | |
| WO2021033226A1 (en) | Speaker unit and speaker curved diaphragm | |
| JP2000102094A (en) | Speaker | |
| CN220422040U (en) | Sound production device and electronic equipment | |
| CN213522360U (en) | Sound producing device | |
| KR102190412B1 (en) | Micro speaker | |
| WO2024000690A1 (en) | Coaxial loudspeaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |