CN111654793A - Voice coil and sound generating device - Google Patents
Voice coil and sound generating device Download PDFInfo
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- CN111654793A CN111654793A CN202010615742.0A CN202010615742A CN111654793A CN 111654793 A CN111654793 A CN 111654793A CN 202010615742 A CN202010615742 A CN 202010615742A CN 111654793 A CN111654793 A CN 111654793A
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- 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
- H04R9/04—Construction, mounting, or centering of coil
- H04R9/046—Construction
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- 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
- H04R9/025—Magnetic circuit
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- 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
- H04R9/04—Construction, mounting, or centering of coil
- H04R9/045—Mounting
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- 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
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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
The invention discloses a voice coil and a sound generating device, wherein the voice coil comprises: the coil comprises a cylindrical framework, a first coil section wound outside the framework, a second coil section and a third coil section wound outside the first coil section, wherein the second coil section and the third coil section are arranged at intervals in the axial direction of the first coil section. The technical scheme of the invention has the advantages that the voice coil is lightened in mass and can reduce nonlinear distortion.
Description
Technical Field
The invention relates to the technical field of acoustics, in particular to a voice coil and a sound generating device using the voice coil.
Background
In the related art, in order to make the sound generating device have a larger amplitude in a low frequency region, a section of continuous coil is wound in the axial direction of the framework of the voice coil, and such a design results in a larger overall mass of the voice coil, and reduces the sensitivity of the voice coil. And in order to improve the sensitivity of the voice coil, the length of the coil on the framework in the axial direction is shortened, so that the coil is separated from a magnetic induction line dense area in a magnetic gap in the vibration process of the voice coil, and the distortion of the sound production device in the sound production process is caused.
Disclosure of Invention
The invention mainly aims to provide a voice coil, aiming at reducing the nonlinear distortion of a sound generating device during sound generation under the condition of ensuring the sensitivity of the voice coil.
In order to achieve the above object, the present invention provides a voice coil, including:
a cylindrical skeleton is formed; and
a first coil segment wound around the outside of the bobbin, an
And the second coil section and the third coil section are wound outside the first coil section, wherein the second coil section and the third coil section are arranged at intervals in the axial direction of the first coil section.
According to the technical scheme, the second coil section and the third coil section which are arranged at intervals are wound outside the first coil section, the second coil section and the third coil section are spaced, and the thickness of the continuously arranged first coil section is reduced under the condition that the voice coil meets the driving power, so that the overall weight of the voice coil can be reduced, the second coil section and the third coil section are spaced, and the amplitude of a structure formed by the second coil section and the third coil section can be increased in a magnetic line-of-force dense area in the vibration process of the voice coil, so that the BL linearity can be effectively improved, and the distortion phenomenon is avoided.
Optionally, the first coil segment, the second coil segment and the third coil segment are wound by a continuous voice coil wire.
Optionally, in the voice coil wire winding process, the winding sequence of the first coil section, the second coil section and the third coil section is as follows: a first coil segment, a third coil segment, a second coil segment.
Optionally, the first coil section is formed by winding a voice coil wire, and the second coil section and the third coil section are formed by winding another voice coil wire;
or one of the second coil section and the third coil section and the first coil section are formed by winding one voice coil wire, and the other of the second coil section and the third coil section is formed by winding the other voice coil wire;
wherein, the two voice coil wires are connected in series or in parallel.
Optionally, the first coil section, the second coil section, and the third coil section are respectively formed by winding three different voice coil wires, wherein the three voice coil wires are arranged in parallel, or two of the three voice coil wires are connected in parallel and then connected in series with the remaining voice coil wire, or three voice coil wires are connected in series.
Optionally, the first coil section is provided with at least one layer of voice coil wire layer;
the number of the voice coil wire layers arranged in the radial direction of the first coil section is less than or equal to the number of the voice coil wire layers arranged in the radial direction of the second coil section and/or the third coil section.
Optionally, the number of voice coil wire layers in the radial direction of the second coil segment is the same as or different from the number of voice coil wire layers in the radial direction of the third coil segment.
The invention also provides a sound production device, which comprises a shell and a magnetic circuit system accommodated in the shell, and the sound production device also comprises the voice coil, wherein a magnetic gap is formed in the magnetic circuit system, and one end of the voice coil extends into the magnetic gap.
Optionally, the magnetic circuit system includes a magnetic conductive yoke, and a central magnetic circuit portion and a side magnetic circuit portion disposed on the magnetic conductive yoke, the magnetic gap is formed between the central magnetic circuit portion and the side magnetic circuit portion, a central magnetic conductive plate is disposed on an upper surface of the central magnetic circuit portion, and a width of a gap between the second coil segment and the third coil segment is smaller than a thickness of the central magnetic conductive plate.
Optionally, the total length of the voice coil wire in the second coil section is the same as the total length of the voice coil wire in the second coil section, and the center of the gap between the second coil section and the third coil section is located on the horizontal center line of the central magnetically permeable plate.
Optionally, the second coil segment is located above the third coil segment;
the total length of the voice coil wire in the second coil section is greater than the total length of the voice coil wire in the third coil section, and the center of the gap between the second coil section and the third coil section is positioned below the horizontal center line of the central magnetic conduction plate;
or the total length of the voice coil wire in the second coil section is smaller than that of the voice coil wire in the third coil section, and the center of the gap between the second coil section and the third coil section is positioned above the horizontal center line of the central magnetic conduction plate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is an exploded view of the sound generating device of the present invention;
FIG. 2 is a partial cross-sectional view of a voice coil according to one embodiment of the present invention;
FIG. 3 is a cross-sectional view of yet another embodiment of a voice coil in the sound generating device of FIG. 1;
FIG. 4 is a cross-sectional view of a first embodiment of the sound generator of FIG. 1;
FIG. 5 is a cross-sectional view of a second embodiment of the sound generator of FIG. 1;
fig. 6 is a cross-sectional view of a third embodiment of the sound generator of fig. 1.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 1 | |
140a | |
| 10 | |
140b | |
| 110 | |
140c | |
| 111 | |
20 | |
| 112 | Folded |
210 | Magnetic |
| 113 | |
220 | Inner |
| 114 | |
221 | |
| 120 | |
222 | Central |
| 130 | |
230 | Outer |
| 140 | Coil |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1, 4 to 6, in the embodiment of the present invention, the sound generating device 1 includes a housing, and a vibration system 10 and a magnetic circuit system 20 accommodated in the housing.
The inner magnetic path portion 220 includes a central magnet 221 disposed at a central position of the magnetic yoke 210 and a central magnetic conductive plate 222 disposed on the central magnet 221, wherein the magnetic yoke 210 may be T-shaped or bowl-shaped, when the magnetic yoke 210 is T-shaped, the outer magnetic path portion 230 includes an edge magnet disposed at an edge position of the magnetic yoke 210 and an edge magnetic conductive plate disposed on the edge magnet, the magnetic gap is formed between the edge magnet and the edge magnetic conductive plate, the central magnet 221, and the central magnetic conductive plate 222, and when the magnetic yoke 210 is bowl-shaped, the magnetic gap is formed between a wall of the bowl of the magnetic yoke 210 and the central magnet 221, and the central magnetic conductive plate 222.
The invention further provides a voice coil 120, and provides the voice coil 120, in order to improve the acoustic performance of the sound generating device 1.
Referring to fig. 2, in the embodiment of the present invention, the voice coil 120 includes a bobbin 130 forming a cylindrical shape and a coil 140 formed by winding a voice coil wire outside the bobbin 130, and the coil 140 includes a first coil segment 140a, and a second coil segment 140b and a third coil segment 140c wound outside the first coil segment 140a, wherein the second coil segment 140b and the third coil segment 140c are arranged at an interval in an axial direction of the first coil segment 140 a. It is understood that although two other coil segments are listed as being wound on the first coil segment 140a in the drawings of the present application, three or four coil segments may be provided on the first coil segment 140a in other embodiments, and the present application adopts the scheme of providing the second coil segment 140b and the third coil segment 140c on the first coil segment 140a in the drawings in view of reducing the cost and the weight of the voice coil 120.
According to the technical scheme of the invention, under the conditions that the sensitivity of the voice coil 120 is ensured, the voice coil 120 has certain weight and the length of the voice coil wire in the coil 140 is certain, the second coil section 140b and the third coil section 140c which are arranged at intervals are wound outside the first coil section 140a designed in the coil 140, namely, the voice coil 120 is not a long section which is continuous in equal thickness like the prior art but one coil section is replaced by three coil sections, and a certain distance is reserved between the two coil sections at the outer side, so that the magnetic force lines in a magnetic circuit system can be more fully utilized under the condition that the total length of the voice coil wire is not changed, and the driving force of the magnetic circuit system on the voice coil is increased. Under the condition that the total lengths of the voice coil wires are the same and the number of layers is the same, the height range of the coil 140 in the longitudinal direction can be increased due to the gap between the two coil sections, and the problem of insufficient utilization of magnetic lines of force caused by the fact that the voice coil is easy to deviate from a magnetic line dense area in the vertical vibration process in the prior art is solved. The region with dense magnetic lines refers to the region around the central magnetic conductive plate 222, and specifically refers to the region around the central magnetic conductive plate 222 corresponding to the region between the upper surface and the lower surface of the central magnetic conductive plate 222, where the magnetic lines are the most dense and the magnetic field strength is the most intense. In the structure of splitting one coil section into two coil sections, at least a part of the two coil sections can be placed in the magnetic line concentration region during the vibration process of the voice coil 120, and the utilization rate of the magnetic lines is significantly higher than that of the traditional structure of one coil section. In this embodiment, two coil segments correspond to one region of high magnetic flux concentration.
The structure of the voice coil 120 of the present invention will be described in several respects.
Regarding the winding structure of the coil segment.
In some embodiments, the first coil segment 140a, the second coil segment 140b, and the third coil segment 140c are conducted in series. In the present embodiment, the first coil segment 140a, the second coil segment 140b and the third coil segment 140c are formed by winding a continuous voice coil wire, and the second coil segment 140b and the third coil segment 140c are conducted by means of a jumper wire. In the process of winding the voice coil wire, the winding sequence of the first coil segment 140a, the second coil segment 140b and the third coil segment 140c is as follows: the first coil segment 140a, the third coil segment 140c, and the second coil segment 140b can be seen from fig. 2 that the second coil segment 140b is located above the third coil segment 140c, and through the above formation sequence, when one voice coil wire is wound, the third coil segment 140c can be directly wound from the end of the first coil segment 140a, so that more crossover wires are avoided, the manufacturing process is simpler, and the efficiency is higher. When the first coil segment 140a, the second coil segment 140b and the third coil segment 140c are arranged in series, the position of the voice coil 120 in the magnetic gap can be modeled according to the electromotive force difference between the second coil segment 140b and the third coil segment 140c when the voice coil is electrified, so that the position of the voice coil 120 can be calculated in real time, and the vibration system of the sound generating device 1 can be optimized in real time to improve the acoustic performance of the sound generating device 1. Specifically, when the two coil segments are connected in series, the positions of the second coil segment 140b and the third coil segment 140c in the magnetic field of the magnetic gap are different, so that the magnetic induction intensities passing through the second coil segment 140b and the third coil segment 140c are also different, and the induced electromotive forces generated by the second coil segment 140b and the third coil segment 140c are also different, and by detecting the voltage difference at the connection point of the second coil segment 140b and the third coil segment 140c, the relative position of the second coil segment 140b and the third coil segment 140c in the magnetic field, that is, the vibration position of the entire voice coil 120 in the magnetic field, can be calculated in real time.
If the voice coil 120 deviates from the preset position in the vibration process, the positions of the second coil segment 140b and the third coil segment 140c will change, and at this time, the induced electromotive force generated by the second coil segment 140b and the third coil segment 140c will change, that is, the voltage difference at the connection position of the second coil segment 140b and the third coil segment 140c changes, and the overall deviation of the voice coil 120 can be calculated by detecting the change of the voltage difference, so that the voice coil 120 can return to the preset position again by means of externally inputting the compensation current, the position of the voice coil 120 is corrected, the vibration stability and symmetry of the voice coil 120 in the magnetic field are improved, and the overall acoustic performance of the sound generating device 1 is effectively improved.
In some embodiments, the first coil segment 140a is formed by winding a voice coil wire, and the second coil segment 140b and the third coil segment 140c are formed by winding another voice coil wire;
or, one of the second coil segment 140b and the third coil segment 140c and the first coil segment 140a are formed by winding one voice coil wire, and the other of the second coil segment 140b and the third coil segment 140c is formed by winding the other voice coil wire; wherein, the two voice coil wires are connected in series or in parallel. For example, the first coil segment 140a is conducted in series with the third coil segment 140c, and the second coil segment 140b and the third coil segment 140c are arranged in parallel, which is advantageous in that independent control circuits can be designed for the first coil segment 140a and the second coil segment 140b, respectively, so that the best acoustic performance can be obtained by adjusting the ratio of the input currents in the first coil segment 140a and the second coil segment 140b in real time by monitoring the positions of the first coil segment 140a and the second coil segment 140b in the magnetic gap, and adjusting the BL linear region. In other embodiments, the first coil section 140a, the second coil section 140b, and the third coil section 140c are respectively formed by winding three different voice coil wires, wherein the three voice coil wires are connected in parallel, or two of the three voice coil wires are connected in parallel and then connected in series with the remaining voice coil wire, or three voice coil wires are connected in series. The first coil segment 140a, the second coil segment 140b and the third coil segment 140c are connected in parallel. Therefore, an independent control circuit can be carried out, the BL linear region is conveniently adjusted, and distortion is avoided.
In some embodiments, the number of layers of the voice coil wire arranged in the radial direction of the first coil section 140a is less than or equal to the number of layers of the voice coil wire arranged in the radial direction of the second coil section 140b and/or the third coil section 140 c. First coil section 140a of this application is provided with at least one deck voice coil line layer, wherein the voice coil line layer is through the structure that a plurality of voice coil coils that the voice coil formed around skeleton 130 arranged at a vertical surface, the quantity of the voice coil line layer of radially arranging through first coil section 140a is less than or equal to the quantity of the voice coil line layer of radially arranging of second coil section 140b and third coil section 140c, so, under the certain circumstances of voice coil line total length in voice coil 120, can make coil 140 be bigger at the ascending length of the axial of skeleton 130, thereby improved the problem that the magnetic line of force that the dense district of magnetic line of easy skew leads to in the up-and-down vibration process of prior art voice coil has utilized inadequately. And also enables the voice coil 120 to adjust the BL linear region width, reducing nonlinear distortion. A better sound quality is obtained.
Alternatively, the number of voice coil wire layers in the radial direction of the second coil segment 140b is the same as the number of voice coil wire layers in the radial direction of the third coil segment 140 c. When the number of the voice coil wire layers of the second coil segment 140b in the radial direction is the same as the number of the voice coil wire layers of the third coil segment 140c in the radial direction, the magnetic circuit design can be applied to the situation of relative symmetry, and then the symmetric magnetic circuit is corresponding to the situation of symmetric structure of the second coil segment 140b and the third coil segment 140c, so that the BL curve symmetry of the voice coil 120 is good, and the nonlinear distortion is reduced. The number of the voice coil wire layers of the second coil segment 140b in the radial direction may be different from the number of the voice coil wire layers of the third coil segment 140c in the radial direction, which considers the asymmetric situation existing in the magnetic circuit design, the number of the voice coil wire layers 141 in the coil segment corresponding to the region with dense magnetic lines is also larger, and the number of the voice coil wire layers 141 in the coil segment corresponding to the region with non-dense magnetic lines is also correspondingly reduced, so that the asymmetry of the magnetic circuit design can be compensated, the situation of BL asymmetry caused by different BL attenuations is reduced, and the effect of a more symmetric BL curve is obtained.
Further, referring to fig. 3, since the lower end of the second coil segment 140b and the upper end of the third coil segment 140c are closer to the dense magnetic field lines region, the number of winding turns in the voice coil wire layer of the lower portion of the second coil segment 140b is greater than the number of winding turns in the voice coil wire layer of the upper portion thereof, and the number of winding turns in the voice coil wire layer of the upper portion of the third coil segment 140c is greater than the number of winding turns in the voice coil wire layer of the lower portion thereof, such an arrangement, after the voice coil 120 is inserted into the magnetic gap, the lower end of the second coil segment 140b with the denser number of winding turns and the upper end of the third coil segment 140c with the denser number of winding turns are concentrated in the dense magnetic field lines region, when the sound generating apparatus 1 is operated and the voice coil 120 vibrates up and down, the occurrence of BL asymmetry caused by the difference can be reduced, and the distortion of the, the sensitivity of the voice coil 120 under a large voltage is improved, thereby improving the performance of the sound generating apparatus. Wherein FO is that the loudspeaker has a natural resonant frequency FO in the low frequency band, and the distortion of the frequency band near the FO point is the largest in the effective audio frequency range of the normal loudspeaker.
Regarding the structure of the voice coil wire.
The voice coil wire may be an enameled wire, and the diameter of the voice coil wire in the voice coil 120 may be selected to be about 0.03-0.20 mm. If the wire diameter is 0.20mm or more, the specific gravity of the voice coil 120 becomes large, and the vibration loss becomes large. If the wire diameter is 0.03mm or less, the strength tends to be insufficient, and it is difficult to realize a high power output of the sound generating apparatus 1, and the gap between the first coil section 140a and the second coil 140 is set to be larger than the wire diameter of one voice coil wire, for example, larger than 0.2 mm. Because there is the interval between second coil section 140b and the second coil section 140c, has increased the vertical height of coil 140, and in the vibration process of voice coil 120, first coil section 140a, second coil section 140b and third coil section 140c will always have partial structure to be in the intensive district of magnetic force line, so can effectively promote BL linear region, avoid the distortion phenomenon.
As can be seen from the above, one end of the voice coil 120 extends into the magnetic gap, and the upper surface of the inner magnetic path portion 220 is provided with the central magnetic conductive plate 222, since the magnetic lines of force in the magnetic circuit system 20 of the sound generating apparatus 1 can be gathered by the action of the central magnetic conductive plate 222 to be fully utilized, wherein the magnetic gap corresponding to the height section of the central magnetic conductive plate 222 is a magnetic line-dense area, in order to effectively utilize the magnetic lines of force and achieve the driving sensitivity of the voice coil 120, in the present application, the width of the gap between the second coil section 140b and the third coil section 140c is smaller than the thickness of the central magnetic conductive plate 222, and in a natural state, the gap between the second coil section 140b and the third coil section 140c is within the height section of the central magnetic conductive plate 222; and since the width of the gap between the second coil segment 140b and the third coil segment 140c is smaller than the thickness of the central magnetic conductive plate 222, and the lower end of the second coil segment 140b and the upper end of the third coil segment 140c are both located in the dense magnetic line region, the first coil segment 140a, the second coil segment 140b and the third coil segment 140c can cut magnetic lines of force during the starting stage, and thus can push the diaphragm 110 upward or downward.
Referring to fig. 4, in some embodiments, the total length of the voice coil wire in the second coil segment 140b is the same as the total length of the voice coil wire in the third coil segment 140c, and the center of the gap between the second coil segment 140b and the third coil segment 140c is located on the horizontal centerline of the central magnetically permeable plate 222. In this embodiment, the total length of the voice coil wire in the first coil section 140a is the same as the total length of the voice coil wire in the second coil section 140b, the driving forces of the second coil section 140b and the third coil section 140c are equivalent, the symmetry of the BL is good, and the nonlinear distortion is reduced.
Referring to fig. 5, in some embodiments, the total length of the voice coil wire in the second coil segment 140b is greater than the total length of the voice coil wire in the third coil segment 140c, and the center of the gap between the second coil segment 140b and the third coil segment 140c is located below the horizontal center line of the central magnetic conductive plate 222, in this embodiment, the design of relatively dense magnetic lines of force in the upper portion can be applied, by making the total length of the voice coil wire in the second coil segment 140b greater than the total length of the voice coil wire in the third coil segment 140 c. The condition that the magnetic circuit design is asymmetric can be effectively compensated, so that the condition that BL curves are symmetric is improved, and the tone quality effect is favorably improved.
Referring to fig. 6, in some embodiments, the total length of the voice coil wire in the second coil segment 140b is less than the total length of the voice coil wire in the third coil segment 140c, and the center of the gap between the second coil segment 140b and the third coil segment 140c is located above the horizontal center line of the central magnetically permeable plate 222. In this embodiment, it is possible to apply a design in which the magnetic lines of force in the lower portion are relatively dense, by making the total length of the voice coil wire in the second coil section 140b smaller than that of the voice coil wire in the third coil section 140 c. The condition that the magnetic circuit design is asymmetric can be effectively compensated, so that the condition that BL curves are symmetric is improved, and the tone quality effect is favorably improved.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (11)
1. A voice coil, comprising:
a cylindrical skeleton is formed; and
a first coil segment wound around the outside of the bobbin, an
And the second coil section and the third coil section are wound outside the first coil section, wherein the second coil section and the third coil section are arranged at intervals in the axial direction of the first coil section.
2. The voice coil of claim 1, wherein the first coil segment, the second coil segment, and the third coil segment are wound from a continuous voice coil wire.
3. The voice coil of claim 2, wherein during the winding of the voice coil wire, the first coil section, the second coil section, and the third coil section are wound in the following order: a first coil section, a third coil section, a second coil section.
4. The voice coil of claim 1, wherein the first coil section is formed by winding a voice coil wire, and the second coil section and the third coil section are formed by winding another voice coil wire;
or one of the second coil section and the third coil section and the first coil section are formed by winding one voice coil wire, and the other of the second coil section and the third coil section is formed by winding the other voice coil wire;
wherein, the two voice coil wires are connected in series or in parallel.
5. The voice coil according to claim 1, wherein the first coil section, the second coil section, and the third coil section are respectively formed by winding three different voice coil wires, wherein the three voice coil wires are arranged in parallel, or two of the three voice coil wires are connected in parallel and then connected in series with the remaining voice coil wire, or three voice coil wires are connected in series.
6. The voice coil according to any one of claims 1 to 5, wherein the first coil section is provided with at least one layer of voice coil wire;
the number of the voice coil wire layers arranged in the radial direction of the first coil section is less than or equal to the number of the voice coil wire layers arranged in the radial direction of the second coil section and/or the third coil section.
7. The voice coil of claim 6, wherein the number of voice coil wire layers in the radial direction of the second coil segment is the same as or different from the number of voice coil wire layers in the radial direction of the third coil segment.
8. A sound generating device 1 comprising a casing and a magnetic circuit system housed in the casing, wherein the sound generating device further comprises a voice coil as claimed in any one of claims 1 to 7, the magnetic circuit system is formed with a magnetic gap, and one end of the voice coil extends into the magnetic gap.
9. The sound generating apparatus 1 as claimed in claim 8, wherein the magnetic circuit system comprises a magnetic yoke, a central magnetic circuit portion and a side magnetic circuit portion, the central magnetic circuit portion and the side magnetic circuit portion are disposed on the magnetic yoke, the magnetic gap is formed between the central magnetic circuit portion and the side magnetic circuit portion, the central magnetic circuit portion is disposed on the upper surface thereof with a central magnetic conductive plate, and the width of the gap between the second coil segment and the third coil segment is smaller than the thickness of the central magnetic conductive plate.
10. A sound-generating device 1 as claimed in claim 9, characterized in that the total length of the voice coil wire in the second coil section is the same as the total length of the voice coil wire in the second coil section, and the centre of the gap between the second coil section and the third coil section is located on the horizontal centre line of the central magnetically permeable plate.
11. The sound generating device 1 as claimed in claim 9, wherein said second coil section is located above said third coil section;
the total length of the voice coil wire in the second coil section is greater than the total length of the voice coil wire in the third coil section, and the center of the gap between the second coil section and the third coil section is positioned below the horizontal center line of the central magnetic conduction plate;
or the total length of the voice coil wire in the second coil section is smaller than that of the voice coil wire in the third coil section, and the center of the gap between the second coil section and the third coil section is positioned above the horizontal center line of the central magnetic conduction plate.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010615742.0A CN111654793A (en) | 2020-06-29 | 2020-06-29 | Voice coil and sound generating device |
| CN202011129569.XA CN112055289B (en) | 2020-06-29 | 2020-10-21 | Voice coil and sound generating device |
| PCT/CN2020/127130 WO2022000915A1 (en) | 2020-06-29 | 2020-11-06 | Voice coil and sound production device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010615742.0A CN111654793A (en) | 2020-06-29 | 2020-06-29 | Voice coil and sound generating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111654793A true CN111654793A (en) | 2020-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010615742.0A Pending CN111654793A (en) | 2020-06-29 | 2020-06-29 | Voice coil and sound generating device |
| CN202011129569.XA Active CN112055289B (en) | 2020-06-29 | 2020-10-21 | Voice coil and sound generating device |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011129569.XA Active CN112055289B (en) | 2020-06-29 | 2020-10-21 | Voice coil and sound generating device |
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| CN (2) | CN111654793A (en) |
| WO (1) | WO2022000915A1 (en) |
Cited By (1)
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|---|---|---|---|---|
| WO2022000915A1 (en) * | 2020-06-29 | 2022-01-06 | 歌尔股份有限公司 | Voice coil and sound production device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115914953A (en) * | 2021-09-22 | 2023-04-04 | 歌尔科技有限公司 | Speaker and electronic apparatus |
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| JPS56107698A (en) * | 1980-01-30 | 1981-08-26 | Matsushita Electric Ind Co Ltd | Dynamic loudspeaker |
| JP2005184589A (en) * | 2003-12-22 | 2005-07-07 | Matsushita Electric Ind Co Ltd | Voice coil for electroacoustic transducer, electroacoustic transducer employing the voice coil, and electronic device and apparatus employing electroacoustic transducer |
| US7492918B2 (en) * | 2004-08-17 | 2009-02-17 | Step Technologies Inc. | Audio speaker with graduated voice coil windings |
| US8761433B2 (en) * | 2006-06-12 | 2014-06-24 | Harman International Industries, Incorporated | Variable impedance voice coil loudspeaker |
| US20100054520A1 (en) * | 2008-08-28 | 2010-03-04 | Jason Myles Cobb | Loudspeaker |
| US8008813B2 (en) * | 2009-02-11 | 2011-08-30 | Kyle Lee Keating | Systems and methods for an improved linear motor |
| CN202334872U (en) * | 2011-11-17 | 2012-07-11 | 美特科技(苏州)有限公司 | Speaker |
| CN102523545A (en) * | 2011-12-27 | 2012-06-27 | 楼氏电子（北京）有限公司 | Voice coil and formation method and application thereof |
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| CN105933833A (en) * | 2016-05-25 | 2016-09-07 | 深圳精拓创新科技有限公司 | Voice coil, manufacturing method thereof and loudspeaker |
| CN206879086U (en) * | 2017-05-23 | 2018-01-12 | 东莞成谦音响科技有限公司 | Multisection type coil loud speaker |
| CN108566596B (en) * | 2018-04-18 | 2020-09-01 | 歌尔股份有限公司 | Voice coil winding method, voice coil and acoustic generator with voice coil |
| CN108769878B (en) * | 2018-06-13 | 2021-04-02 | 歌尔股份有限公司 | Voice coil, vibration subassembly and vocal ware |
| CN110830890B (en) * | 2019-11-11 | 2021-12-28 | 歌尔股份有限公司 | Voice coil assembly and loudspeaker |
| CN111654793A (en) * | 2020-06-29 | 2020-09-11 | 歌尔股份有限公司 | Voice coil and sound generating device |
-
2020
- 2020-06-29 CN CN202010615742.0A patent/CN111654793A/en active Pending
- 2020-10-21 CN CN202011129569.XA patent/CN112055289B/en active Active
- 2020-11-06 WO PCT/CN2020/127130 patent/WO2022000915A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022000915A1 (en) * | 2020-06-29 | 2022-01-06 | 歌尔股份有限公司 | Voice coil and sound production device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022000915A1 (en) | 2022-01-06 |
| CN112055289A (en) | 2020-12-08 |
| CN112055289B (en) | 2022-05-17 |
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