CN117354686A - Novel voice coil and loudspeaker - Google Patents

Abstract

The invention relates to the technical field of loudspeakers and discloses a novel voice coil and a loudspeaker, wherein the novel voice coil comprises a framework and a coil assembly, the coil assembly comprises a first coil layer and a second coil layer, the first coil layer is wound on the outer wall of the framework, and the second coil layer is wound on one side of the first coil layer, which is opposite to the framework; the cross-sectional area of the coil of the first coil layer is larger than the cross-sectional area of the coil of the second coil layer, and the coil of the first coil layer is connected in parallel with the coil of the second coil layer. According to the technical scheme, under the condition that the weight of the voice coil is not increased, the first coil layer and the second coil layer with different cross-sectional areas are wound on the framework respectively and then are connected in parallel, the inductance of the novel voice coil is lower than that of a conventional voice coil, so that the sensitivity of the loudspeaker provided with the novel voice coil is higher than that of the conventional loudspeaker, the loudspeaker provided with the novel voice coil can respond to high-frequency signal input better, and the distortion rate of the loudspeaker for converting low-frequency signals is reduced.

Description

Novel voice coil and loudspeaker

Technical Field

The invention relates to the technical field of speakers, in particular to a novel voice coil and a speaker.

Background

A loudspeaker is a very common electroacoustic transducer element which is found in sound-producing electronic and electrical devices. It is one of the most important devices for sound effects. Speakers are of a wide variety and are widely priced. The audio electric energy causes the cone or the diaphragm to vibrate the surrounding air to cause sound through electromagnetic, piezoelectric or electrostatic effects. A moving coil type, a capacitance type, a piezoelectric type, an electromagnetic type, an ionization type, a pneumatic type loudspeaker and the like are separated according to a transduction mechanism and a structure; separating paper cone type, horn type and diaphragm type according to the acoustic radiation material; the shape of the cone is divided into a round shape, an elliptic shape, a double cone and a rubber folding ring; the method comprises the steps of dividing bass, midrange, treble and the like according to working frequencies; the structure is ultrathin and conventional.

The greater the weight of the voice coil, the lower the sensitivity of the speaker, so that the speaker outputs less sound with the same power input. At present, an ultrathin loudspeaker or a loudspeaker with a conventional structure mostly adopts an independent axial magnetic circuit design. In the related art, the voice coils of these speakers are manufactured by conventional coil processes of 2L, 4L, 6L, etc. The voice coil manufactured by the traditional coil technology has larger inductance and lower sensitivity, and the loudspeaker manufactured by the traditional voice coil has the condition of low-frequency distortion.

Disclosure of Invention

The invention mainly aims to provide a novel voice coil, which aims to reduce the inductance of the voice coil.

In order to achieve the above object, the present invention provides a novel voice coil, comprising:

a skeleton; and

the coil assembly comprises a first coil layer and a second coil layer, the first coil layer is wound on the outer wall of the framework, and the second coil layer is wound on one side, opposite to the framework, of the first coil layer; the cross-sectional area of the coil of the first coil layer is larger than the cross-sectional area of the coil of the second coil layer, and the coil of the first coil layer is connected in parallel with the coil of the second coil layer.

Optionally, the cross section of the coil of the first coil layer and the cross section of the coil of the second coil layer are both circular; the coil assembly further comprises a support layer, and the support layer is arranged between the first coil layer and the second coil layer.

Optionally, the first coil layer includes two thick coils stacked, and the second coil layer includes two thin coils stacked, and a cross-sectional shape of the thick coils is consistent with a cross-sectional shape of the thin coils.

The invention also proposes a loudspeaker comprising:

vibrating diaphragm, magnetic circuit assembly and any one of the above novel voice coils; the magnetic circuit assembly is internally provided with a ring groove, the coil assembly and the framework are movably arranged in the ring groove, and the framework is connected with the vibrating diaphragm.

Optionally, the speaker further comprises a basin stand, and the magnetic circuit assembly comprises a U iron, a main magnet and a main washer; a lower limit opening is formed at one end of the basin frame, and the U iron is in butt joint limit with the periphery of the lower limit opening; the main magnet and the main washer are vertically stacked in the U-shaped iron and are enclosed with the inner wall of the U-shaped iron to form the annular groove.

Optionally, the speaker still includes annular cantilever, the basin frame is kept away from the one end of lower spacing mouth still is formed with spacing mouth, the outer fringe of annular cantilever with the periphery butt of last spacing mouth, and connect the outer fringe of vibrating diaphragm, the spherical top of vibrating diaphragm passes spacing mouth on with the skeleton is connected.

Optionally, the speaker further comprises a damper, wherein the damper is formed with a central boss and a wave structure; the central boss is adhered to the vibrating diaphragm, a connecting ring is formed on the outer edge of the wave structure, and the connecting ring is adhered to the magnetic circuit assembly.

Optionally, the magnetic circuit assembly is formed with a through hole opposite to the central boss, and one end of the through hole, which is close to the central boss, is formed with an annular inclined plane.

Optionally, the speaker further includes a magnetism increasing component, the magnetism increasing component includes a secondary magnet and a secondary washer, the secondary magnet is connected to a side of the primary washer facing away from the primary magnet, and the secondary washer is connected to a side of the secondary magnet facing away from the primary washer.

Optionally, the magnetic circuit assembly further comprises a short circuit ring, an annular sinking table is formed on one side, facing the auxiliary magnet, of the main washer, and the short circuit ring is arranged on the annular sinking table and is connected with the framework.

In the technical scheme of the invention, the coil assembly comprises a first coil layer and a second coil layer, wherein the first coil layer is wound on the outer wall of the framework, and the second coil layer is wound on one side of the first coil layer, which is opposite to the framework; the cross-sectional area of the coil of the first coil layer is larger than the cross-sectional area of the coil of the second coil layer, and the coil of the first coil layer is connected in parallel with the coil of the second coil layer. In the technical scheme of the invention, under the condition that other conditions are the same, the inductance of the novel voice coil is lower than that of the conventional voice coil, and the lower inductance of the novel voice coil enables the sensitivity of the loudspeaker provided with the novel voice coil to be higher than that of the conventional loudspeaker, so that the loudspeaker provided with the novel voice coil can respond to high-frequency signal input better, and the distortion rate of the loudspeaker for converting low-frequency signals can be reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic cross-sectional view of a voice coil according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of yet another embodiment of a novel voice coil;

fig. 3 is a schematic perspective view of an embodiment of a high-sensitivity ultra-thin full-frequency speaker according to the present invention;

FIG. 4 is a cross-sectional view of the high sensitivity ultra-thin full-range speaker of FIG. 3 taken along line A-A;

fig. 5 is a schematic perspective view of another embodiment of a high sensitivity ultra-thin full-frequency speaker.

Reference numerals illustrate:

the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

Referring to fig. 1 and 2, in order to solve the problem of larger inductance of the conventional voice coil, the present invention provides a novel voice coil 1000, which includes:

the coil assembly 2 comprises a first coil layer 21 and a second coil layer 22, wherein the first coil layer 21 is wound on the outer wall of the framework 1, and the second coil layer 22 is wound on one side, facing away from the framework 1, of the first coil layer 21; the cross-sectional area of the coils of the first coil layer 21 is larger than the cross-sectional area of the coils of the second coil layer 22, and the coils of the first coil layer 21 are connected in parallel with the coils of the second coil layer 22.

In the technical scheme of the invention, under the condition of not increasing the weight of the voice coil, the first coil layer 21 and the second coil layer 22 with different cross-sectional areas are wound on the framework 1 respectively and then are connected in parallel, the inductance of the novel voice coil 1000 is lower than that of a conventional voice coil, and the sensitivity of the loudspeaker 2000 provided with the novel voice coil 1000 is higher than that of the conventional loudspeaker 2000 due to the lower inductance of the novel voice coil 1000, so that the loudspeaker 2000 provided with the novel voice coil 1000 can respond to high-frequency signal input better, and the distortion rate of the loudspeaker 2000 for converting low-frequency signals can be reduced.

The cross section of the coil of the first coil layer 21 and the cross section of the coil of the second coil layer 22 may be circular or rectangular. In an embodiment, the cross section of the coil of the first coil layer 21 and the cross section of the coil of the second coil layer 22 are both circular; the coil assembly 2 further comprises a support layer 23, the support layer 23 being arranged between the first coil layer 21 and the second coil layer 22. When the cross sections of the coils of the first coil layer 21 and the second coil layer 22 are circular, the surface of the coil assembly 2 is uneven after the first coil layer 21 and the second coil layer 22 are laminated, which may affect the performance of the speaker 2000, because the coil of the first coil layer 21 and the coil of the second coil layer 22 have different wire diameters and a gap between them. The support layer 23 is supported between the first coil layer 21 and the second coil layer 22, and since the coil wire diameters of the second coil layer 22 are the same, when there is a gap between the coils of the second coil layer 22, the surface of the coil assembly 2 is also flattened, so that the influence of the unevenness of the coil assembly 2 on the performance of the speaker 2000 can be reduced.

The first coil layer 21 may be composed of a single-layer coil or a double-layer coil, and the same applies to the second coil layer 22. In an embodiment, the first coil layer 21 includes two thick coils 211 stacked and the second coil layer 22 includes two thin coils 221 stacked, and the cross-sectional shape of the thick coils 211 coincides with the cross-sectional shape of the thin coils 221. The more the number of coil layers, the higher the sensitivity of the speaker 2000, but the higher the manufacturing cost, so after balancing the performance and manufacturing cost of the speaker 2000, it is preferable that the first coil layer 21 and the second coil layer 22 are each composed of a double-layered coil.

Referring to fig. 3, fig. 4 and fig. 5, the present invention further provides a speaker 2000, where the speaker 2000 includes a novel voice coil 1000, and the specific structure of the novel voice coil 1000 refers to the above embodiments, and since the speaker 2000 adopts all the technical solutions of all the embodiments, at least has all the beneficial effects brought by the technical solutions of the embodiments, and will not be described in detail herein.

In one embodiment, the speaker 2000 includes a diaphragm 3, a magnetic circuit assembly, and a novel voice coil 1000; wherein, the magnetic circuit assembly is internally provided with a ring groove 41, the coil assembly 2 and the framework 1 are movably arranged in the ring groove 41, and the framework 1 is connected with the vibrating diaphragm 3. The magnetic circuit component forms a magnetic field in the annular groove 41, and the coil component 2 is movably arranged in the annular groove 41; after the coil assembly 2 is electrified, the coil assembly 2 vibrates in the annular groove 41, the coil assembly 2 is wound on the framework 1, and the framework 1 is connected with the vibrating diaphragm 3, so that the coil assembly 2 drives the vibrating diaphragm 3 to vibrate so that the vibrating diaphragm 3 emits sound.

In one embodiment, the speaker 2000 further includes a tub 5, and the magnetic circuit assembly includes a U-iron 42, a main magnet 43, and a main washer 44; a lower limit opening is formed at one end of the basin frame 5, and the U iron 42 is in butt joint limit with the periphery of the lower limit opening; the main magnet 43 and the main washer 44 are vertically stacked in the U-shaped iron 42, and enclose the inner wall of the U-shaped iron 42 to form the annular groove 41. The main magnet 43 and the main washer 44 are arranged in the novel voice coil 1000, so that the diameter of the voice coil can be increased under the condition that the sizes of the main magnet 43 and the main washer 44 are fixed, and the voice coil can be adhered to the outer side of the vibrating diaphragm 3; because the vibrating diaphragm 3 is in the shape of a hemispherical shape with a wide upper part and a narrow lower part, the voice coil is adhered to the outer side of the vibrating diaphragm 3, so that the distance between the bottom of the vibrating diaphragm 3 and the magnetic circuit assembly is shorter, and the overall structure height of the loudspeaker 2000 can be reduced under the condition that the heights of the magnetic circuit assemblies are the same.

In an embodiment, the speaker 2000 further includes an annular hanging edge 6, an upper limit opening is further formed at one end of the basin stand 5 away from the lower limit opening, the outer edge of the annular hanging edge 6 is abutted to the periphery of the upper limit opening and is connected with the outer edge of the vibrating diaphragm 3, and the spherical top of the vibrating diaphragm 3 passes through the upper limit opening to be connected with the framework 1. The annular hanging edge 6 is fixed on the basin frame 5 and is connected with the outer edge of the vibrating diaphragm 3, so that vertical supporting force is provided for the vibrating diaphragm 3, and the vibrating diaphragm 3 can be prevented from generating larger deflection during working; meanwhile, the annular suspension edge 6 is used as a flexible structure, so that the impact force of the vibrating diaphragm 3 can be dispersed, the vibration energy of the vibrating diaphragm 3 is absorbed, and the damage of the vibrating diaphragm 3 during vibration is reduced; finally, the annular overhanging edge 6 can control the amplitude of the vibrating diaphragm 3 to a certain extent, so that the vibrating diaphragm 3 can keep stable vibration, and more accurate and clearer sound can be output.

In one embodiment, the speaker 2000 further includes a damper 7, where the damper 7 is formed with a central boss 71 and a wave structure 72; the central boss 71 is adhered to the diaphragm 3, the outer edge of the wave structure 72 forms a connection ring 721, and the connection ring 721 is adhered to the magnetic circuit assembly. The vibrating diaphragm 3 is connected with the magnetic circuit assembly through the elastic wave 7, and the vibrating diaphragm 3 moves vertically and straightly due to the structural characteristic of the elastic wave 7; meanwhile, when the amplitude of the vibrating diaphragm 3 is too large, the elastic wave 7 can buffer the vibration of the vibrating diaphragm 3.

When the amplitude of the vibrating diaphragm 3 is overlarge, the elastic wave 7 can be deformed downwards by the vibrating diaphragm 3 when buffering the vibration of the vibrating diaphragm 3, if the bottom of the elastic wave 7 is contacted with the magnetic circuit component, the magnetic circuit component can apply the reaction force of the elastic wave 7, the reaction force applied to the elastic wave 7 is transmitted to the vibrating diaphragm 3, and the reaction force is overlapped with the force applied to the vibrating diaphragm 3 by the vibration of the framework 1, so that the vibration frequency and the vibration amplitude of the vibrating diaphragm 3 can be changed, and the sound emitted by the vibrating diaphragm 3 is distorted. In an embodiment, the magnetic circuit assembly is formed with a through hole 45 opposite to the central boss 71, and an annular inclined plane 451 is formed at one end of the through hole 45 near to the central boss 71, so as to increase the vibration space of the damper 7, so as to avoid the damper 7 from affecting the vibration of the diaphragm 3, thereby reducing the distortion rate of the speaker 2000.

In one embodiment, the speaker 2000 further includes a magnetic assembly, which includes a secondary magnet 81 and a secondary washer 82, wherein the secondary magnet 81 is connected to a side of the primary washer 44 facing away from the primary magnet 43, and the secondary washer 82 is connected to a side of the secondary magnet 81 facing away from the primary washer 44. The magnetic field intensity in the loudspeaker 2000 is enhanced after the magnetic increment assembly is added, so that the sensitivity of the loudspeaker 2000 can be improved, meanwhile, the vibrating diaphragm 3 can vibrate more linearly, and the distortion rate of the loudspeaker 2000 is reduced.

In one embodiment, the magnetic circuit assembly further comprises a shorting ring 46, an annular sinking platform is formed on the side of the main washer 44 facing the auxiliary magnet 81, and the shorting ring 46 is arranged on the annular sinking platform and is connected with the framework 1. The shorting ring 46 can improve the high frequency response of the speaker 2000 and reduce the distortion rate of the speaker 2000; meanwhile, the annular sinking table is arranged to place the short-circuit ring 46, so that the height of the upper end face of the short-circuit ring 46 is consistent with that of the upper end face of the main washer 44, and the connection between the auxiliary magnet 81 and the short-circuit ring 46 and the main washer 44 is more stable.

The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.

Claims (10)

1. A novel voice coil, comprising:

a skeleton; and

the coil assembly comprises a first coil layer and a second coil layer, the first coil layer is wound on the outer wall of the framework, and the second coil layer is wound on one side, opposite to the framework, of the first coil layer; the cross-sectional area of the coil of the first coil layer is larger than the cross-sectional area of the coil of the second coil layer, and the coil of the first coil layer is connected in parallel with the coil of the second coil layer.

2. The novel voice coil of claim 1, wherein the cross section of the coil of the first coil layer and the cross section of the coil of the second coil layer are both circular; the coil assembly further comprises a support layer, and the support layer is arranged between the first coil layer and the second coil layer.

3. The novel voice coil of claim 1, wherein the first coil layer comprises two thick coils arranged in a stacked arrangement and the second coil layer comprises two thin coils arranged in a stacked arrangement, the thick coils having a cross-sectional shape that is consistent with the cross-sectional shape of the thin coils.

4. A loudspeaker, characterized in that it comprises a diaphragm, a magnetic circuit assembly and a novel voice coil according to any one of claims 1 to 3; the magnetic circuit assembly is internally provided with a ring groove, the coil assembly and the framework are movably arranged in the ring groove, and the framework is connected with the vibrating diaphragm.

5. The loudspeaker of claim 4, further comprising a frame, the magnetic circuit assembly comprising U-iron, a main magnet, and a main washer; a lower limit opening is formed at one end of the basin frame, and the U iron is in butt joint limit with the periphery of the lower limit opening; the main magnet and the main washer are vertically stacked in the U-shaped iron and are enclosed with the inner wall of the U-shaped iron to form the annular groove.

6. The loudspeaker of claim 5, further comprising an annular hanging edge, wherein an upper limit opening is further formed at one end of the basin frame away from the lower limit opening, the outer edge of the annular hanging edge is abutted against the periphery of the upper limit opening and connected with the outer edge of the vibrating diaphragm, and the spherical top of the vibrating diaphragm penetrates through the upper limit opening and is connected with the framework.

7. The loudspeaker of claim 4, further comprising a flick wave formed with a central boss and a wave structure; the central boss is adhered to the vibrating diaphragm, a connecting ring is formed on the outer edge of the wave structure, and the connecting ring is adhered to the magnetic circuit assembly.

8. The loudspeaker of claim 7, wherein the magnetic circuit assembly is formed with a through hole with respect to the center boss, and an annular inclined surface is formed at an end of the through hole near the center boss.

9. The loudspeaker of claim 5, further comprising a magnetically enhanced assembly comprising a secondary magnet and a secondary washer, the secondary magnet being coupled to a side of the primary washer facing away from the primary magnet, the secondary washer being coupled to a side of the secondary magnet facing away from the primary washer.

10. The loudspeaker of claim 9, wherein the magnetic circuit assembly further comprises a shorting ring, an annular sinking platform is formed on a side of the main washer facing the auxiliary magnet, and the shorting ring is arranged on the annular sinking platform and is connected with the framework.