CN213280073U - Voice coil and sound generating device - Google Patents
Voice coil and sound generating device Download PDFInfo
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- CN213280073U CN213280073U CN202022360753.7U CN202022360753U CN213280073U CN 213280073 U CN213280073 U CN 213280073U CN 202022360753 U CN202022360753 U CN 202022360753U CN 213280073 U CN213280073 U CN 213280073U
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Abstract
The utility model discloses a voice coil loudspeaker voice coil and applied sound generating mechanism of this voice coil loudspeaker voice coil, wherein the voice coil loudspeaker voice coil includes: constitute the skeleton of tube-shape and be in by the wire coiling the skeleton outside and the first coil section that forms, first coil section has the multilayer wire layer of radially arranging, wherein, attached the wire layer of skeleton is connected with the voice coil loudspeaker voice coil lead-out wire, multilayer wire layer is being close to the terminal surface that one side of voice coil loudspeaker voice coil lead-out wire formed is the orientation and keeps away from the direction slope setting of voice coil loudspeaker voice coil lead-out wire. The utility model discloses technical scheme has avoided the phenomenon of voice coil loudspeaker voice coil vibration in-process because of interfering the production noise.
Description
Technical Field
The utility model relates to an acoustics technical field, in particular to voice coil loudspeaker voice coil and sound generating mechanism who uses this voice coil loudspeaker voice coil.
Background
The voice coil is an important component in a sound generating device such as a speaker, and the performance of the voice coil is directly related to the sound generating performance of the sound generating device. In the correlation design of voice coil loudspeaker voice coil, in order to make the voice coil loudspeaker voice coil have great power, can twine the multilayer wire layer that stacks and arrange in the voice coil loudspeaker voice coil, arrange and can be connected with the voice coil loudspeaker voice coil lead-out wire in the wire layer of innermost side, the voice coil loudspeaker voice coil lead-out wire need span the multilayer from inside to outside wire layer of arranging and go to connect supply circuit, current voice coil loudspeaker voice coil structure, at voice coil loudspeaker voice coil vibration in-process, because the voice coil loudspeaker voice coil lead-out wire spans multilayer wire layer, produce easily and interfere with other wire layers, thereby lead to sound generating mechanism.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a voice coil loudspeaker voice coil, aim at avoiding voice coil loudspeaker voice coil lead-out wire and wire layer in the voice coil loudspeaker voice coil to produce at the vibration in-process and interfere to avoid the sound generating mechanism sound production in-process to produce the noise.
In order to achieve the above object, the utility model provides a voice coil loudspeaker voice coil, include:
a cylindrical skeleton is formed; and
the coil comprises a framework, a plurality of layers of lead layers and a plurality of lead wires, wherein the framework is arranged on the framework, the first coil section is formed outside the framework in a wound mode, the first coil section is provided with the plurality of layers of lead layers which are arranged in the radial direction, the lead layers of the framework are attached to be connected with voice coil lead wires, the plurality of layers of lead layers are close to the end faces formed on one sides of the voice coil lead wires, and the end faces are towards and away from the voice coil.
The utility model discloses technical scheme is through in the voice coil loudspeaker voice coil on the multilayer wire layer of having arranged, the terminal surface that one side that is close to the voice coil loudspeaker voice coil lead-out wire with the multilayer wire layer formed is the direction slope setting of keeping away from the voice coil loudspeaker voice coil lead-out wire towards, so the voice coil loudspeaker voice coil lead-out wire is stretching over multilayer wire layer to the outside by the inboard when, because the tip distance increase on voice coil loudspeaker voice coil lead-out wire and each wire layer, so at voice coil loudspeaker voice coil vibration in-process, the voice coil loudspeaker voice coil lead-out wire is difficult for appearing producing the collision with the wire layer and interferes, and then.
Alternatively, the number of turns around which the wires in the wire layers arranged from the inside to the outside are wound is reduced in the radial direction.
Optionally, a second coil section is further wound on the framework, the first coil section and the second coil section are arranged at intervals in the axial direction of the framework, and the first coil section and the second coil section are connected in series and conducted; alternatively, the first coil section and the second coil section are arranged in parallel.
Optionally, the structure of the second coil segment is the same as the structure of the first coil segment.
Optionally, when the first coil section and the second coil section are conducted in series, the first coil section and the second coil section are wound by a continuous wire; or, the wires in the first coil section and the second coil section are conducted through a pad.
Optionally, the number of wire layers in the first coil segment and the number of wire layers in the second coil segment are the same or different.
Optionally, the first coil section, the second coil section and the bobbin are coaxially disposed.
The utility model also provides a sound production device, including the casing, accept magnetic circuit and voice coil loudspeaker voice coil in the casing, magnetic circuit is formed with the magnetic gap, the one end of voice coil loudspeaker voice coil stretches into in the magnetic gap, the voice coil loudspeaker voice coil is including the skeleton that constitutes the tube-shape and by the wire coiling the skeleton outside and the coil that forms, the coil has the multilayer wire layer of radially arranging, wherein, the wire layer attached to the skeleton is connected with the voice coil loudspeaker voice coil lead-out wire, the terminal surface that multilayer wire layer formed is being close to one side of voice coil loudspeaker voice coil lead-out wire is the direction slope setting of keeping away from the voice coil loudspeaker voice coil lead-out wire, the coil includes at least first coil section and the second coil section that the interval set up in the axial of skeleton, first coil section with the second coil section is established ties and is switched; or the first coil section and the second coil section are arranged in parallel, and the first coil section and the second coil section are respectively provided with the voice coil lead-out wire.
Optionally, the magnetic circuit system includes 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, 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 first coil section and the second coil section is smaller than a thickness of the central magnetic conductive plate.
Optionally, the total length of the wire in the first coil section is the same as the total length of the wire in the second coil section, and the center of the gap between the first coil section and the second coil section is located on the horizontal center line of the central magnetically permeable plate.
Optionally, the first coil segment is located above the second coil segment;
the total length of the wires in the first coil section is greater than the total length of the wires in the second coil section, and the center of the gap between the first coil section and the second coil section is positioned below the horizontal center line of the central magnetic conduction plate;
or the total length of the wire in the first coil section is smaller than that of the wire in the second coil section, and the center of the gap between the first coil section and the second coil section is located 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 needed to be 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 schematic view of the sound generating device of the present invention;
fig. 2 is a partial cross-sectional view of a voice coil according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a first embodiment of the sound generator of FIG. 1;
FIG. 4 is a cross-sectional view of a second embodiment of the sound generator of FIG. 1;
fig. 5 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 | |
141 | |
| 111 | |
142 | Voice coil lead-out |
| 112 | Folded |
20 | |
| 113 | |
220 | Inner |
| 114 | |
221 | |
| 120 | |
222 | Central |
| 130 | |
230 | Outer |
| 140 | Coil |
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; 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 meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to 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, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1 and fig. 3 to fig. 5, 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 contained in the housing.
In some embodiments, the yoke may be T-shaped or bowl-shaped, when the yoke is bowl-shaped, the inner magnetic path portion 220 includes a central magnet 221 disposed at a central position of the yoke and a central magnetic conductive plate 222 disposed on the central magnet 221, the magnetic gap is formed between the wall of the bowl of the yoke and the central magnet 221 and the central magnetic conductive plate 222, when the yoke is T-shaped, the outer magnetic path portion 230 includes an edge magnet disposed at an edge position of the yoke and an edge magnetic conductive plate disposed on the edge magnet, and the magnetic gap is formed between the edge magnet and the edge magnetic conductive plate and the T-shaped column.
The utility model discloses a promote the acoustic performance of sound generating mechanism 1, further, still improve voice coil loudspeaker voice coil 120 to a voice coil loudspeaker voice coil 120 is proposed.
Referring to fig. 2, in an embodiment, the voice coil 120 includes: the coil 140 comprises a first coil section 140a, the first coil section 140a is provided with a plurality of layers of lead layers 141 arranged in the radial direction, wherein the lead layer 141 attached to the bobbin 130 (namely, the innermost lead layer 141) is connected with a voice coil lead wire 142, the end face of the multilayer lead layer 141 formed on one side close to the voice coil lead wire 142 is inclined towards the direction far away from the voice coil lead wire 142, or the distance d between the end face f formed on one side close to the voice coil lead wire 142 and the voice coil lead wire 142 of the multilayer lead layer 141 is increased from inside to outside.
The utility model discloses technical scheme is through in the voice coil loudspeaker voice coil 120 of the multilayer wire layer 141 of having arranged, the terminal surface that one side that is close to voice coil loudspeaker voice coil lead-out wire 142 with multilayer wire layer 141 formed is the orientation and inclines the setting of keeping away from voice coil loudspeaker voice coil lead-out wire 142, so voice coil loudspeaker voice coil lead-out wire 142 is when stretching multilayer wire layer 141 to the outside by the inboard, because the tip distance increase of voice coil loudspeaker voice coil lead-out wire 142 and each wire layer 141, so at voice coil loudspeaker voice coil 120 vibration in-process, voice coil loudspeaker voice coil lead-out wire 142 is difficult for appearing producing the collision with wire layer 141 and interferes, and then can avoid 1 sound production in-process.
Alternatively, the number of turns around which the wires in the wire layer 141 arranged from the inside to the outside are wound is reduced in the radial direction. The wire forming the coil 140 is an enameled wire, wherein the voice coil lead-out wire 142 may be a part of the wire, that is, a part of the wire which belongs to the beginning of the wire, and when the wire is a round section in the winding process of the coil 140, a spiral groove is formed in the wire layer 141 after the wire is spirally wound, and the number of turns of the wire wound in the wire layer 141 arranged from the inner side to the outer side is reduced, and the wire in the wire layer 141 before the wire in the wire layer 141 is filled in the spiral groove in the wire layer 141 after the wire is wound, so that the first turn of the wire corresponding to the wire in the wire layer 141 after the first turn is retracted in the length direction of the coil 140, and thus the distance d between the voice coil lead-out wire 142 and the end of the wire layer 141 outside is increased, and of course, in order to ensure that the voice coil 120 has a sufficiently large driving force, it is necessary to ensure that there are enough number of the wire coils 140 in the coil 140, for example, in fig. 2, the layers may be gradually inclined from the innermost first layer to the third layer so as to avoid interference during vibration, and the fourth layer and the subsequent layers may be kept flush with the third layer.
Further, the coil 140 further includes a second coil section 140b wound on the bobbin 130, and the first coil section 140a and the second coil section 140b are spaced apart from each other in the axial direction of the bobbin 130.
The utility model discloses still with arrange a coil section replacement in magnetic gap in prior art for two coil sections, and have a determining deviation between two coil sections, under the unchangeable condition of the total length of voice coil line (the length that indicates a coil section of prior art with the utility model discloses the length sum of two voice coil sections is the same), the magnetic line of force among the more abundant utilization magnetic circuit to increase magnetic circuit to the drive power of voice coil loudspeaker voice coil. 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.
In some embodiments, the first coil segment 140a and the second coil segment 140b are conducted in series; the first coil section 140a and the second coil section 140b may be electrically connected in series, and when the first coil section 140a and the second coil section 140b are electrically connected in series, in the working process of the voice coil 120, the position of the voice coil 120 in the magnetic gap is modeled according to the electromotive force difference between the first coil section 140a and the second coil section 140b, so that the position of the voice coil 120 can be calculated in real time, and the vibration system of the sound generating apparatus 1 can be optimized in real time, so as to improve the acoustic performance of the sound generating apparatus 1. Specifically, when the two coil segments are connected in series, the positions of the first coil segment 140a and the second coil segment 140b in the magnetic field of the magnetic gap are different, so the magnetic induction intensities passing through the first coil segment 140a and the second coil segment 140b are also different, and the induced electromotive forces generated by the first coil segment 140a and the second coil segment 140b are also different, and by detecting the voltage difference at the connection point of the first coil segment 140a and the second coil segment 140b, the relative position of the first coil segment 140a and the second coil segment 140b in the magnetic field, that is, the vibration position of the whole 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 first coil section 140a and the second coil section 140b will change, and at this time, the induced electromotive force generated by the first coil section 140a and the second coil section 140b will change, that is, the voltage difference at the connection between the first voice coil 11 and the second coil section 140b 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 can be corrected, the vibration stability and symmetry of the voice coil 120 in the magnetic field can be improved, and the overall acoustic performance of the sound generating device 1 can be effectively improved.
In some embodiments, the first coil segment 140a and the second coil segment 140b are arranged in parallel. When the first coil segment 140a and the second coil segment 140b are arranged in parallel, independent control circuits can be designed for the first coil segment 140a and the second coil segment 140b, so that the ratio of input currents in the first coil segment 140a and the second coil segment 140b can be adjusted in real time by monitoring the positions of the first coil segment 140a and the second coil segment 140b in a magnetic gap, the BL trend is adjusted, and the best acoustic performance is obtained.
Optionally, the structure of the second coil segment 140b is the same as that of the first coil segment 140a, so that the avoiding structure of the voice coil lead-out wire 142 is formed on both the second coil segment 140b and the first coil segment 140a, thereby avoiding the formation of noise.
In some embodiments, when the first coil section 140a and the second coil section 140b are conducted in series, the first coil section 140a and the second coil section 140b are wound by one continuous wire; alternatively, the wires in the first and second coil segments 140a and 140b are conducted through the bonding pads. With such a design, the selection surface of the voice coil wire in the first coil section 140a and the second coil section 140b is wider, which facilitates the manufacture of the voice coil 120 and reduces the cost.
In some embodiments, the number of layers of voice coil wires in the radial direction of the first coil section 140a is the same as the number of layers of voice coil wires in the radial direction of the second coil section 140 b. When the number of the voice coil wire layers of the first coil section 140a in the radial direction is the same as the number of the voice coil wire layers of the second coil section 140b in the radial direction, the magnetic circuit design can be applied to the situation of relative symmetry, and the first coil section 140a and the second coil section 140b correspond to a symmetrical magnetic circuit under the condition of symmetrical structure, so that the BL curve of the voice coil 120 has good symmetry and the nonlinear distortion is reduced. The number of the voice coil wire layers of the first coil section 140a in the radial direction may be different from the number of the voice coil wire layers of the second coil section 140b in the radial direction, and this situation is that the situation that asymmetry exists in the magnetic circuit design is considered, the number of the voice coil wire layers in the coil section corresponding to the region with dense magnetic lines is also large, and the number of the voice coil wire layers in the coil section corresponding to the region with non-dense magnetic lines is also correspondingly reduced, so that asymmetry of the magnetic circuit design can be compensated, the situation that BL asymmetry caused by different BL attenuations occurs is reduced, and a more symmetric BL curve effect is obtained.
In some embodiments, the first coil segment 140a, the second coil segment 140b, and the bobbin 130 are coaxially disposed. The design can ensure the consistency of action in the vibration process and further avoid generating noise.
As can be seen from the above, the voice coil 120 extends into the magnetic gap, and the central magnetic conductive plate 222 is disposed on the upper surface of the inner magnetic path portion 220, 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 for full utilization, wherein the height section of the magnetic gap corresponding to the central magnetic conductive plate 222 is a dense magnetic line region, in order to effectively utilize the magnetic lines of force and realize the drive sensitivity of the voice coil 120, in the present application, the width of the gap between the first coil section 140a and the second coil section 140b is smaller than the thickness of the central magnetic conductive plate 222, in a natural state, since the gap between the first coil section 140a and the second coil section 140b corresponds to the height section of the central magnetic conductive plate 222, the lower end of the first coil section 140a and the upper end of the second coil section 140b are both located in the dense magnetic line region, and the first coil section 140a and the second coil section 140b can cut the magnetic lines of force during Pushing diaphragm 110.
Referring to fig. 3, in some embodiments, 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, and the center of the gap between the first coil section 140a and the second coil section 140b is located on the horizontal centerline of the central magnetic conductive 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 symmetry of the BL is good, and the nonlinear distortion is reduced.
Referring to fig. 4, in some embodiments, the total length of the voice coil wire in the first coil section 140a is greater than the total length of the voice coil wire in the second coil section 140b, and the center of the gap between the first coil section 140a and the second coil section 140b is located below the horizontal center line of the central magnetic conductive plate 222.
Referring to fig. 5, in some embodiments, the total length of the voice coil wire in the first coil section 140a is smaller than the total length of the voice coil wire in the second coil section 140b, and the center of the gap between the first coil section 140a and the second coil section 140b is located above the horizontal center line of the central magnetic conductive plate 222. In this embodiment, under the condition of effectively improving the nonlinear distortion, the situation that the magnetic circuit design is asymmetric (for example, the magnetic lines of force on the lower side are denser) can be effectively compensated by setting the total length of the voice coil wire in the first coil section 140a to be greater than the total length of the voice coil wire in the second coil section 140b, so that the situation that the BL curve is symmetric is improved, and the tone quality effect is improved.
The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.
Claims (11)
1. A voice coil, comprising:
a cylindrical skeleton is formed; and
the coil comprises a framework, a plurality of layers of lead layers and a plurality of lead wires, wherein the framework is arranged on the framework, the first coil section is formed outside the framework in a wound mode, the first coil section is provided with the plurality of layers of lead layers which are arranged in the radial direction, the lead layers of the framework are attached to be connected with voice coil lead wires, the plurality of layers of lead layers are close to the end faces formed on one sides of the voice coil lead wires, and the end faces are towards and away from the voice coil.
2. The voice coil as claimed in claim 1, wherein the number of turns of winding of the wire in the wire layer arranged from the inner side to the outer side in the radial direction is reduced.
3. The voice coil according to claim 1 or 2, wherein a second coil section is further wound on the bobbin, the first coil section and the second coil section are arranged at an interval in an axial direction of the bobbin, and the first coil section and the second coil section are conducted in series; alternatively, the first coil section and the second coil section are arranged in parallel.
4. The voice coil of claim 3, wherein the structure of the second coil section is the same as the structure of the first coil section.
5. The voice coil of claim 3, wherein the first coil section and the second coil section are wound from a continuous wire when the first coil section and the second coil section are electrically connected in series; or, the wires in the first coil section and the second coil section are conducted through a pad.
6. The voice coil of claim 3, wherein the number of layers of wire in the first coil section and the number of layers of wire in the second coil section are the same or different.
7. The voice coil of claim 3, wherein the first coil section, the second coil section, and the bobbin are coaxially disposed.
8. A sound generating device 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 3 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 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, a central magnetic conductive plate is disposed on an upper surface of the central magnetic circuit portion, and a width of the gap between the first coil segment and the second coil segment is smaller than a thickness of the central magnetic conductive plate.
10. The apparatus according to claim 9, wherein the total length of the wire in said first coil section is the same as the total length of the wire in said second coil section, and wherein the gap between said first and second coil sections is centered on the horizontal centerline of said central magnetically permeable plate.
11. The apparatus according to claim 9 wherein said first coil section is located above said second coil section;
the total length of the wires in the first coil section is greater than the total length of the wires in the second coil section, and the center of the gap between the first coil section and the second coil section is positioned below the horizontal center line of the central magnetic conduction plate;
or the total length of the wire in the first coil section is smaller than that of the wire in the second coil section, and the center of the gap between the first coil section and the second coil section is located above the horizontal center line of the central magnetic conduction plate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021243503 | 2020-06-29 | ||
| CN2020212435039 | 2020-06-29 |
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| Publication Number | Publication Date |
|---|---|
| CN213280073U true CN213280073U (en) | 2021-05-25 |
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|---|---|---|---|
| CN202022360753.7U Active CN213280073U (en) | 2020-06-29 | 2020-10-21 | Voice coil and sound generating device |
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| CN (1) | CN213280073U (en) |
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