Folding ring, voice diaphragm, sounding device and application of sounding device

Abstract

The invention relates to the technical field of sound production devices, and discloses a folded ring, a voice diaphragm, a sound production device and application of the sound production device, one side of a protruding part facing the folded ring is in a protruding shape, and one side of the protruding part close to the center of the folded ring is in an inward concave shape along the direction far away from the center of the folded ring. The side, away from the center of the folding ring, of the protruding part is in a protruding shape in the direction away from the center of the folding ring. The sides, close to the center of the folding ring, of the protruding parts are arranged to be concave inwards, the sides, away from the center of the folding ring, of the protruding parts are arranged to be convex, the equivalent width of the protruding parts of the folding ring can be reduced, under the condition that the amplitude is large, the protruding parts of the folding ring can disperse z-direction stress to the horizontal direction, and therefore the rigidity of the folding ring is reduced, and the service life of the folding ring is prolonged. The rigidity of the voice diaphragm is reduced, the KX quadratic term coefficient is increased, and the cubic distortion of the voice diaphragm is reduced. In addition, when the folding ring vibrates, the highest point of the protruding part of the folding ring moves horizontally, so that the z-direction space of the folding ring is saved, the installation influence of the folding ring on magnetic circuits in the upper space and the lower space is reduced, and the space utilization rate is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of sound-generating devices, and in particular to a folding ring, a sound membrane, a sound-generating device and the application of the sound-generating device. Background Art

[0002] The diaphragm is a membrane for the speaker to play back sound. The diaphragm usually includes a dome located in the center and a folded ring arranged around the dome.

[0003] In the related art, the folded ring of the sound diaphragm is convex, and the side arcs on both sides of the folded ring are convex in directions away from each other. The KX curve is adjusted by adjusting the curvature of the side arcs on both sides of the folded ring and the position of the highest point of the folded ring, thereby improving the distortion of the sound diaphragm. However, the folded ring of the above shape can only balance the stress during vibration in the positive direction, that is, adjust the KX first-order term to reduce the secondary distortion, but it is difficult to reduce the stress in the positive and negative directions at a large amplitude at the same time, so it is impossible to effectively reduce the tertiary distortion. In addition, when the folded ring of the above shape vibrates, the highest point of the folded ring moves up and down, which limits the design of the upper and lower spaces of the magnetic circuit. Summary of the invention

[0004] In view of the above problems, the main purpose of the present invention is to provide a folding ring, a sound membrane, a sound-generating device and the application of the sound-generating device, which can achieve the design requirements of reducing the distortion of the sound membrane and improving the space utilization.

[0005] In a first aspect, the present invention provides a fold ring, comprising a raised portion, wherein the raised portion is convex toward one side of the fold ring, the raised portion is concave on the side close to the center of the fold ring in a direction away from the center of the fold ring, and the raised portion is convex on the side away from the center of the fold ring in a direction away from the center of the fold ring.

[0006] Preferably, the raised portion includes a first raised segment, a second raised segment and a third raised segment connected sequentially along a direction away from the center of the fold ring, the first raised segment is concave along the direction away from the center of the fold ring, and the third raised segment is convex along the direction away from the center of the fold ring.

[0007] Preferably, the second protruding section is convex in a direction away from the folding ring.

[0008] Preferably, the first convex segment, the second convex segment and the third convex segment are all annular structures.

[0009] Preferably, the fold ring further comprises a first connecting portion of an annular structure, and the first connecting portion is connected to a side of the bulge portion close to the center of the fold ring along the circumference of the bulge portion.

[0010] Preferably, the fold ring further comprises a second connecting portion of an annular structure, and the second connecting portion is connected to a side of the bulge portion away from the center of the fold ring along the circumference of the bulge portion.

[0011] In a second aspect, the present invention provides a sound membrane, wherein the sound membrane comprises the folding ring as described above.

[0012] Preferably, the sound membrane includes a spherical top located in the center, and the folding ring is arranged around the spherical top.

[0013] In a third aspect, the present invention provides a sound-generating device, comprising the sound membrane as described above.

[0014] In a fourth aspect, the present invention provides an application of the above-mentioned sound-generating device in a terminal product.

[0015] The folding ring, the sound membrane, the sound-generating device and the application of the sound-generating device of the embodiment of the present invention, the folding ring includes a raised portion, the raised portion is convex on one side facing the folding ring, and the structures on both sides of the raised portion are different, wherein the side of the raised portion close to the center of the folding ring is concave in the direction away from the center of the folding ring, and the side of the raised portion away from the center of the folding ring is convex in the direction away from the center of the folding ring. By setting the side of the raised portion close to the center of the folding ring to be concave and the side of the raised portion away from the center of the folding ring to be convex, the equivalent width of the raised portion of the folding ring can be reduced. In the case of a large amplitude, the raised portion of the folding ring can disperse the z-direction stress to the horizontal direction, thereby reducing the stiffness of the folding ring, that is, reducing the stiffness of the sound membrane, increasing the KX quadratic term coefficient, and reducing the third-order distortion of the sound membrane. In addition, since the side of the raised portion close to the center of the fold ring is concave and the side of the raised portion away from the center of the fold ring is convex, when the fold ring vibrates, the edge of the raised portion on the side away from the center of the fold ring is fixed, and the edge of the raised portion on the side close to the center of the fold ring moves up and down with the dome of the sound membrane, causing the highest point of the raised portion of the fold ring to move horizontally, thereby saving the z-direction space of the fold ring, reducing the impact of the fold ring on the installation of the magnetic circuit in the upper and lower spaces, and improving space utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which: Figure 1 It is a structural schematic diagram of the hem of an embodiment of the present invention; Figure 2 yes Figure 1 AA section view shown; Figure 3 yes Figure 2 A partial enlarged view of part B shown; Figure 4 is a comparison diagram of the total harmonic distortion of the hem in the embodiment of the present invention and the hem in the prior art; Figure 5 It is a comparison diagram of the hem KX simulation curve of the embodiment of the present invention and the hem KX simulation curve of the prior art; Figure 6 It is a comparison diagram of the measured KX curve of the hem folding according to the embodiment of the present invention and the measured KX curve of the hem folding according to the prior art; Figure 7 Schematic diagram of the working state of the hem folding according to the embodiment of the present invention (first movement direction); Figure 8 Schematic diagram of the working state of the folding edge according to the embodiment of the present invention (second movement direction). DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that in the embodiments of the present invention, many technical details are provided to enable readers to better understand the present invention. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present invention can be implemented.

[0018] Reference Figure 1 To Attachment Figure 3 In a first aspect, the present invention provides a folding ring 100, which includes a raised portion 10. The raised portion 10 is convex on one side facing the folding ring 100, is concave on the side close to the center of the folding ring 100 in a direction away from the center of the folding ring 100, and is convex on the side away from the center of the folding ring 100 in a direction away from the center of the folding ring 100.

[0019] The folding ring 100 of the embodiment of the present invention includes a raised portion 10, wherein the raised portion 10 is convex on one side facing the folding ring 100, and the structures on both sides of the raised portion 10 are different, wherein the side of the raised portion 10 close to the center of the folding ring 100 is concave in the direction away from the center of the folding ring 100, and the side of the raised portion 10 away from the center of the folding ring 100 is convex in the direction away from the center of the folding ring 100. By setting the side of the raised portion 10 close to the center of the folding ring 100 to be concave and the side of the raised portion 10 away from the center of the folding ring 100 to be convex, the equivalent width of the raised portion 10 of the folding ring 100 can be reduced. In the case of a large amplitude, the raised portion 10 of the folding ring 100 can disperse the z-direction stress to the horizontal direction, thereby reducing the stiffness of the folding ring 100, that is, reducing the stiffness of the sound film, increasing the coefficient of the KX quadratic term, and reducing the third-order distortion of the sound film. In addition, since the side of the raised portion 10 close to the center of the fold ring 100 is concave and the side of the raised portion 10 away from the center of the fold ring 100 is convex, when the fold ring 100 vibrates, the edge of the raised portion 10 away from the center of the fold ring 100 is fixed, and the edge of the raised portion 10 close to the center of the fold ring 100 moves up and down with the dome of the sound membrane, so that the highest point of the raised portion 10 of the fold ring 100 moves horizontally, thereby saving the z-direction space of the fold ring 100, reducing the impact of the fold ring 100 on the installation of the magnetic circuit in the upper and lower spaces, and improving space utilization.

[0020] It should be noted that the KX curve in this embodiment is a curve showing the change of the stiffness of the diaphragm with position, wherein K is the stiffness of the diaphragm fold ring and X is the displacement of the vibration system.

[0021] Preferably, the raised portion 10 includes a first raised segment 11, a second raised segment 12 and a third raised segment 13 which are sequentially connected in a direction away from the center of the fold 100, the first raised segment 11 is concave in a direction away from the center of the fold 100, and the third raised segment 13 is convex in a direction away from the center of the fold 100. By setting the first raised segment 11 on the side of the raised portion 10 close to the center of the fold 100 to be concave, and setting the third raised segment 13 on the side of the raised portion 10 away from the center of the fold 100 to be convex, the equivalent width of the raised portion 10 can be reduced. In the case of a large amplitude, the raised portion 10 can disperse the z-direction stress to the horizontal direction, thereby reducing the stiffness of the fold 100, that is, reducing the stiffness of the sound film, increasing the coefficient of the KX quadratic term, and reducing the third-order distortion of the sound film. In addition, one end of the third raised segment 13 away from the second raised segment 12 is indirectly fixed, and one end of the first raised segment 11 away from the second raised segment 12 is indirectly connected to the spherical top of the sound membrane. When the sound membrane vibrates, the end of the first raised segment 11 away from the second raised segment 12 moves up and down with the spherical top, and the first raised segment 11 drives the second raised segment 12 to move horizontally, thereby saving the z-direction space of the folding ring 100 and improving space utilization.

[0022] Preferably, the second raised section 12 is convex in a direction away from the folding ring 100. The first raised section 11 and the third raised section 13 are smoothly connected through the second raised section 12 convex in a direction away from the folding ring 100, thereby increasing the angle between the first raised section 11 and the third raised section 13, increasing the relative deformation of the first raised section 11 and the third raised section 13, and improving the service life of the folding ring 100.

[0023] Preferably, the first convex segment 11, the second convex segment 12 and the third convex segment 13 are all annular structures, and the first convex segment 11, the second convex segment 12 and the third convex segment 13 of the annular structure are sequentially connected to form a convex portion 10 of the annular structure.

[0024] Preferably, the folding ring 100 includes a first connecting portion 20 of an annular structure, and the first connecting portion 20 is connected to a side of the convex portion 10 close to the center of the folding ring 100 along the circumference of the convex portion 10. Specifically, the first connecting portion 20 is connected to an end of the first convex segment 11 away from the second convex segment 12 along the circumference of the convex portion 10, and the first convex segment 11 can be connected to the dome through the first connecting portion 20. When the diaphragm vibrates, the dome drives the end of the first convex segment 11 away from the second convex segment 12 to move up and down through the first connecting portion 20.

[0025] Preferably, the folding ring 100 further comprises a second connecting portion 30 of an annular structure, and the second connecting portion 30 is connected to a side of the convex portion 10 away from the center of the folding ring 100 along the circumference of the convex portion 10. Specifically, the second connecting portion 30 is connected to an end of the third convex segment 13 away from the second convex segment 12 along the circumference of the convex portion 10, and the end of the third convex segment 13 away from the second convex segment 12 is fixed by the second connecting portion 30.

[0026] Reference Figure 5 , attached Figure 5 It is a comparison diagram of the KX simulation curve of the fold ring of the embodiment of the present invention and the KX simulation curve of the prior art. The horizontal axis represents the displacement x (mm), and the vertical axis represents k. The dotted line in the figure represents the KX simulation curve of the fold ring of the prior art, and the solid line in the figure represents the KX simulation curve of the fold ring of the embodiment of the present invention.

[0027] The KX simulation curve of the fold ring of the embodiment of the present invention is: y = -3.020x 6 - 0.735x 5 +3.234x 4 +0.197x 3 - 1.507x 2 - 0.444x + 3.450; The KX simulation curve of the folding ring in the prior art is: y = 2.636x 6 -0.677x5 +0.256x 4 - 0.050x 3 - 0.045x 2 - 1.205x + 3.395. It can be seen from the above two formulas that the first-order coefficient of the KX simulation curve of the fold ring of the embodiment of the present invention is -0.4444, and the second-order coefficient is -1.5072, while the first-order coefficient of the KX simulation curve of the fold ring of the prior art is -1.2053, and the second-order coefficient is -0.0459. The absolute value of the first-order coefficient of the KX simulation curve of the fold ring of the embodiment of the present invention, -0.4444, is smaller than the absolute value of the first-order coefficient of the KX simulation curve of the fold ring of the prior art, -1.2053. Compared with the prior art, the first-order coefficient of the KX simulation curve of the fold ring of the embodiment of the present invention is reduced, thereby improving the secondary distortion of the fold ring. The absolute value of the quadratic coefficient of the KX simulation curve of the fold ring of the embodiment of the present invention, -1.5072, is greater than the absolute value of the quadratic coefficient of the KX simulation curve of the fold ring of the prior art, -0.0459. Compared with the prior art, the quadratic coefficient of the KX simulation curve of the fold ring of the embodiment of the present invention is increased, thereby improving the cubic distortion of the fold ring.

[0028] Reference Figure 6 , attached Figure 6 It is a comparison diagram of the KX measured curve of the fold ring of the embodiment of the present invention and the KX measured curve of the prior art. The horizontal axis represents the displacement x (mm), and the vertical axis represents k. The dotted line in the figure represents the KX measured curve of the fold ring of the prior art, and the solid line in the figure represents the KX measured curve of the fold ring of the embodiment of the present invention.

[0029] The measured KX curve of the fold ring of the embodiment of the present invention is: y = -1E-08x 6 +3E-09x 5 - 0.582x 4 -0.322x 3 - 0.763x 2 - 0.375x + 2.300; the measured KX curve of the folding ring in the prior art is: y = -3E-11x 6 +1E-09x 5 +0.185x 4 - 0.254x 3 - 0.035x 2- 0.674x + 2.457. It can be seen from the above two formulas that the first-order coefficient of the measured KX curve of the fold ring of the embodiment of the present invention is -0.375, and the second-order coefficient is - 0.763, while the first-order coefficient of the measured KX curve of the fold ring of the prior art is -0.674, and the second-order coefficient is - 0.035. The absolute value of the first-order coefficient of the measured KX curve of the fold ring of the embodiment of the present invention, -0.375, is smaller than the absolute value of the first-order coefficient of the measured KX curve of the fold ring of the prior art, -0.674. Compared with the prior art, the first-order coefficient of the measured KX curve of the fold ring of the embodiment of the present invention is reduced, thereby improving the secondary distortion of the fold ring. The absolute value of the quadratic coefficient of the KX measured curve of the fold ring of the embodiment of the present invention, -0.763, is greater than the absolute value of the quadratic coefficient of the KX measured curve of the fold ring of the prior art, -0.035. Compared with the prior art, the quadratic coefficient of the KX measured curve of the fold ring of the embodiment of the present invention is increased, thereby improving the cubic distortion of the fold ring.

[0030] By the attached Figure 5 and attached Figure 6 It can be seen that the comparison diagram of the KX simulation curve of the fold ring is consistent with the comparison diagram of the KX measured curve. Compared with the fold ring in the prior art, the fold ring in the embodiment of the present invention has significantly reduced secondary distortion and cubic distortion.

[0031] Reference Figure 4 , attached Figure 4 3 is a comparison diagram of the total harmonic distortion of the fold ring of the embodiment of the present invention and the fold ring of the prior art. The horizontal axis represents the frequency f (Hz), and the vertical axis represents the total harmonic distortion THD (%). The dotted line in the figure represents the total harmonic distortion diagram of the fold ring of the prior art, and the solid line in the figure represents the total harmonic distortion diagram of the fold ring of the embodiment of the present invention.

[0032] By the attached Figure 4 It can be seen that the total harmonic distortion curve of the fold of the embodiment of the present invention is generally below the total harmonic distortion curve of the fold of the prior art, indicating that the distortion of the fold of the prior art is more serious than that of the fold of the embodiment of the present invention, and the distortion of the fold of the embodiment of the present invention is significantly improved. The distortion of the fold of the embodiment of the present invention, in combination with the improvement of the voice coil, is reduced from 35% to 15%, and the effect is obvious.

[0033] Reference Figure 7 and attached Figure 8 , attached Figure 7 FIG. 1 is a schematic diagram of the working state of the fold ring of an embodiment of the present invention in the first movement direction, and FIG. Figure 8 FIG. 1 is a schematic diagram of the working state of the fold ring of an embodiment of the present invention in the second movement direction. Figure 7 and attached Figure 8It can be seen that during the up and down vibration of the side of the fold ring close to the center, the apex of the raised portion of the fold ring moves horizontally, that is, under a large amplitude, the highest point of the fold ring of the embodiment of the present invention moves horizontally, which significantly saves the space below the fold ring, that is, saves the z-direction space of the fold ring, which is beneficial to the optimization of the space design.

[0034] In a second aspect, the present invention provides a sound membrane (not shown in the figure), wherein the sound membrane comprises the folding ring 100 as described above.

[0035] Preferably, the sound membrane includes a dome (not shown in the figure) located in the center, and the folding ring 100 is arranged around the dome.

[0036] Specifically, the first connection portion 20 of the fold ring 100 is connected to the outer edge of the spherical top along the circumference of the spherical top, thereby achieving the connection between the fold ring 100 and the spherical top.

[0037] In a third aspect, the present invention provides a sound-generating device, wherein the sound-generating device comprises the above-mentioned sound membrane. The sound-generating device in this embodiment may be a loudspeaker.

[0038] In a fourth aspect, the present invention provides an application of the above-mentioned sound-generating device in a terminal product. The sound-generating device in this embodiment can be applied to mobile phones, headphones, tablets, computers, cars, televisions, stereos and other fields.

[0039] Those skilled in the art will appreciate that the above-mentioned embodiments are specific embodiments for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A folding ring, characterized in that: The fold ring includes a raised portion, which is convex on one side facing the fold ring, concave on the side close to the center of the fold ring away from the center of the fold ring, and convex on the side away from the center of the fold ring.

2. The folding ring according to claim 1, characterized in that: The raised portion includes a first raised segment, a second raised segment and a third raised segment connected in sequence along a direction away from the center of the fold ring, the first raised segment is concave along the direction away from the center of the fold ring, and the third raised segment is convex along the direction away from the center of the fold ring.

3. The folding ring according to claim 2, characterized in that: The second protruding section is protruding in a direction away from the folding ring.

4. The folding ring according to claim 2, characterized in that: The first convex segment, the second convex segment and the third convex segment are all annular structures.

5. The folding ring according to claim 1, characterized in that: The folding ring further comprises a first connecting portion of an annular structure, wherein the first connecting portion is connected to a side of the bulging portion close to the center of the folding ring along the circumference of the bulging portion.

6. The folding ring according to claim 1, characterized in that: The fold ring further comprises a second connecting portion of an annular structure, wherein the second connecting portion is connected to a side of the bulge portion away from the center of the fold ring along the circumference of the bulge portion.

7. A sound film, characterized in that: The diaphragm comprises a fold according to any one of claims 1 to 6.

8. The sound membrane according to claim 7, characterized in that: The sound membrane includes a spherical top located in the center, and the folding ring is arranged around the spherical top.

9. A sound-generating device, characterized in that: The sound generating device comprises the sound membrane according to claim 8.

10. Use of the sound-generating device according to claim 9 in a terminal product.

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