Folding rings, sound membranes, sound-generating devices and electronic equipment

Abstract

The present invention relates to the technical field of sound-generating devices, and discloses a folding ring, a sound diaphragm, a sound-generating device, and an application of the sound-generating device. A raised portion is convex on the side facing the folding ring, concave on the side near the center of the folding ring away from the center of the folding ring, and convex on the side away from the center of the folding ring away from the center of the folding ring. By configuring the side of the raised portion near 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. Under large amplitude conditions, the raised portion of the folding ring can disperse z-direction stress horizontally, thereby reducing the stiffness of the folding ring, that is, reducing the stiffness of the sound diaphragm, increasing the KX quadratic term coefficient, and reducing the third-order distortion of the sound diaphragm. Furthermore, when the folding ring vibrates, the highest point of the raised portion of the folding ring moves horizontally, thereby saving z-direction space of the folding ring, reducing the impact of the folding ring on the installation of the magnetic circuit in the upper and lower spaces, and improving space utilization.

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 applications of the sound-generating device. Background Art

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

[0003] In related art, the surround of the diaphragm is convex, with the side arcs on either side convexly facing away from each other. By adjusting the curvature of the side arcs and the position of the highest point of the surround, the KX curve is adjusted to improve the diaphragm's distortion. However, this surround shape can only balance stress during positive vibration, that is, adjusting the first-order KX term to reduce secondary distortion. It is difficult to simultaneously reduce stress in both positive and negative directions at large amplitudes, and therefore cannot effectively reduce tertiary distortion. Furthermore, when the surround shape vibrates, the highest point of the surround moves up and down, limiting the design of the upper and lower spaces of the magnetic circuit. Summary of the Invention

[0004] In response to 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 folding ring, which includes a raised portion, wherein the raised portion is convex on one side toward the folding ring, the raised portion is concave on the side close to the center of the folding ring in a direction away from the center of the folding ring, and the raised portion is convex on the side away from the center of the folding ring in a direction away from the center of the folding ring.

[0006] Preferably, 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 folding ring, the first raised segment is concave along the direction away from the center of the folding ring, and the third raised segment is convex along the direction away from the center of the folding 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, wherein 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, 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.

[0011] In a second aspect, the present invention provides a sound diaphragm, which includes the folding ring as described above.

[0012] Preferably, the sound membrane includes a centrally located dome, and the folding ring is arranged around the dome.

[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 embodiments of the present invention relate to a fold, a sound diaphragm, a sound-generating device, and an application thereof. The fold includes a raised portion, wherein the raised portion is convex on one side facing the fold, and the structures on both sides of the raised portion are different. The side of the raised portion near the center of the fold is concave in a direction away from the center of the fold, and the side of the raised portion away from the center of the fold is convex in a direction away from the center of the fold. By configuring the side of the raised portion near the center of the fold to be concave and the side of the raised portion away from the center of the fold to be convex, the equivalent width of the raised portion of the fold can be reduced. When the amplitude is large, the raised portion of the fold can disperse the z-direction stress in the horizontal direction, thereby reducing the stiffness of the fold, that is, reducing the stiffness of the sound diaphragm, increasing the KX quadratic term coefficient, and reducing the third-order distortion of the sound diaphragm. 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. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

[0017] Figure 1 Schematic diagram of the structure of the hem in an embodiment of the present invention;

[0018] Figure 2 yes Figure 1 AA section shown;

[0019] Figure 3 yes Figure 2 A partial enlarged view of portion B shown;

[0020] Figure 4 This is a comparison chart of the total harmonic distortion of the hem according to the embodiment of the present invention and the hem in the prior art;

[0021] Figure 5 1. 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;

[0022] Figure 6 1. It is a comparison diagram of the measured KX curve of the hem according to the embodiment of the present invention and the measured KX curve of the hem according to the prior art;

[0023] Figure 7 Schematic diagram of the working state of the hem folding according to the embodiment of the present invention (first direction of movement);

[0024] Figure 8 3 is a schematic diagram of the working state of the folding edge according to the embodiment of the present invention (second movement direction). DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions, and advantages of the present invention more apparent, various embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will appreciate that many technical details are provided in various embodiments of the present invention to facilitate a better understanding of the present invention. However, even without these technical details and the various variations and modifications based on the following embodiments, the technical solutions claimed in the present invention can still be implemented.

[0026] Reference Attachment Figure 1 To the attached 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 the side facing the folding ring 100, and 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. The raised portion 10 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.

[0027] The edge 100 of the present invention includes a raised portion 10. The side of the raised portion 10 facing the edge 100 is convex, and the structures on both sides of the raised portion 10 are different. Specifically, the side of the raised portion 10 near the center of the edge 100 is concave in a direction away from the center of the edge 100, while the side of the raised portion 10 facing away from the center of the edge 100 is convex in a direction away from the center of the edge 100. By configuring the side of the raised portion 10 near the center of the edge 100 to be concave and the side of the raised portion 10 facing away from the center of the edge 100 to be convex, the equivalent width of the raised portion 10 of the edge 100 can be reduced. Under high amplitude conditions, the raised portion 10 of the edge 100 can disperse z-direction stress in the horizontal direction, thereby reducing the stiffness of the edge 100, that is, reducing the stiffness of the sound diaphragm, increasing the coefficient of the quadratic term KX, and reducing the third-order distortion of the sound diaphragm. In addition, since the side of the raised portion 10 close to the center of the folding ring 100 is concave and the side of the raised portion 10 away from the center of the folding ring 100 is convex, when the folding ring 100 vibrates, the edge of the raised portion 10 on the side away from the center of the folding ring 100 is fixed, and the edge of the raised portion 10 close to the center of the folding ring 100 moves up and down with the dome of the sound membrane, causing the highest point of the raised portion 10 of the folding ring 100 to move horizontally, thereby saving the z-direction space of the folding ring 100, reducing the impact of the folding ring 100 on the installation of the magnetic circuit in the upper and lower spaces, and improving space utilization.

[0028] It should be noted that the KX curve in this embodiment is a curve showing the change in the stiffness of the diaphragm with position, wherein K is the stiffness of the diaphragm fold and X is the displacement of the vibration system.

[0029] Preferably, the raised portion 10 includes a first raised segment 11, a second raised segment 12, and a third raised segment 13, sequentially connected in a direction away from the center of the bezel 100. The first raised segment 11 is concave in the direction away from the center of the bezel 100, and the third raised segment 13 is convex in the direction away from the center of the bezel 100. By configuring the first raised segment 11 on the side of the raised portion 10 closer to the center of the bezel 100 to be concave, and configuring the third raised segment 13 on the side of the raised portion 10 facing away from the center of the bezel 100 to be convex, the equivalent width of the raised portion 10 can be reduced. In the case of large amplitude, the raised portion 10 can disperse the z-direction stress in the horizontal direction, thereby reducing the stiffness of the bezel 100, that is, reducing the stiffness of the sound diaphragm, increasing the coefficient of the quadratic term KX, and reducing the third-order distortion of the sound diaphragm. In addition, the end of the third raised segment 13 away from the second raised segment 12 is indirectly fixed, and the 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.

[0030] Preferably, the second raised section 12 is convex in a direction away from the fold ring 100. The first raised section 11 and the third raised section 13 are smoothly connected by the second raised section 12 convex in a direction away from the fold ring 100, thereby increasing the angle between the first raised section 11 and the third raised section 13, improving the relative deformation of the first raised section 11 and the third raised section 13, and improving the service life of the fold ring 100.

[0031] Preferably, the first raised segment 11, the second raised segment 12 and the third raised segment 13 are all annular structures, and the first raised segment 11 of the annular structure, the second raised segment 12 of the annular structure and the third raised segment 13 of the annular structure are sequentially connected to form the raised portion 10 of the annular structure.

[0032] Preferably, the fold 100 includes a first connecting portion 20 having an annular structure. The first connecting portion 20 is connected to the side of the bulge 10 near the center of the fold 10 along the circumference of the bulge 10. Specifically, the first connecting portion 20 is connected to the end of the first bulge segment 11 facing away from the second bulge segment 12 along the circumference of the bulge 10. The first bulge segment 11 can be connected to the dome via the first connecting portion 20. When the diaphragm vibrates, the dome drives the end of the first bulge segment 11 facing away from the second bulge segment 12 to move up and down via the first connecting portion 20.

[0033] Preferably, the fold 100 further includes a second connecting portion 30 of an annular structure, which is connected to a side of the raised portion 10 facing away from the center of the fold 10 along the circumference of the raised portion 10. Specifically, the second connecting portion 30 is connected to an end of the third raised segment 13 facing away from the second raised segment 12 along the circumference of the raised portion 10, and the end of the third raised segment 13 facing away from the second raised segment 12 is fixed by the second connecting portion 30.

[0034] Reference Attachment Figure 5 , attached Figure 5 This 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.

[0035] 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 existing folding ring is: y = 2.636x 6 -0.677x5 +0.256x 4 - 0.050x 3 - 0.045x 2 - 1.205x + 3.395. As can be seen from the above two formulas, the linear coefficient of the KX simulation curve of the surround in the embodiment of the present invention is -0.4444, and the quadratic coefficient is -1.5072. The linear coefficient of the KX simulation curve of the surround in the prior art is -1.2053, and the quadratic coefficient is -0.0459. The absolute value of the linear coefficient of the KX simulation curve of the surround in the embodiment of the present invention, -0.4444, is smaller than the absolute value of the linear coefficient of the KX simulation curve of the surround in the prior art, -1.2053. Compared to the prior art, the linear coefficient of the KX simulation curve of the surround in the embodiment of the present invention is reduced, thereby improving the quadratic distortion of the surround. The absolute value of the quadratic coefficient of the KX simulation curve of the surround in 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 surround in the prior art, -0.0459. Compared with the prior art, the quadratic coefficient of the KX simulation curve of the surround in the embodiment of the present invention is increased, thereby improving the cubic distortion of the surround.

[0036] Reference Attachment Figure 6 , attached Figure 6 This 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.

[0037] 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 KX curve of the existing technology is: y = -3E-11x 6 +1E-09x 5 +0.185x 4 - 0.254x 3 - 0.035x 2- 0.674x + 2.457. As can be seen from the above two formulas, the linear coefficient of the measured KX curve of the surround in the embodiment of the present invention is -0.375, and the quadratic coefficient is -0.763. The linear coefficient of the measured KX curve of the surround in the prior art is -0.674, and the quadratic coefficient is -0.035. The absolute value of the linear coefficient of -0.375 of the measured KX curve of the surround in the embodiment of the present invention is smaller than the absolute value of the linear coefficient of -0.674 of the measured KX curve of the surround in the prior art. Compared with the prior art, the linear coefficient of the measured KX curve of the surround in the embodiment of the present invention is reduced, thereby improving the quadratic distortion of the surround. The absolute value of the quadratic coefficient of the measured KX curve of the surround of the embodiment of the present invention, -0.763, is greater than the absolute value of the quadratic coefficient of the measured KX curve of the surround of the prior art, -0.035. Compared with the prior art, the quadratic coefficient of the measured KX curve of the surround of the embodiment of the present invention is increased, thereby improving the cubic distortion of the surround.

[0038] By the attached Figure 5 and attached Figure 6 It can be seen that the comparison diagram of the KX simulation curve of the surround is consistent with the comparison diagram of the KX measured curve. Compared with the surround in the prior art, the surround in the embodiment of the present invention has significantly reduced secondary distortion and cubic distortion.

[0039] Reference Attachment Figure 4 , attached Figure 4 3 is a comparison chart of the total harmonic distortion of the surround according to the embodiment of the present invention and the surround according to 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 of the surround according to the prior art, and the solid line in the figure represents the total harmonic distortion of the surround according to the embodiment of the present invention.

[0040] By the attached Figure 4 As can be seen, the total harmonic distortion curve for the surround of the embodiment of the present invention is generally lower than that of the conventional surround, indicating that the distortion of the conventional surround is more severe than that of the embodiment of the present invention, while the distortion of the surround of the embodiment of the present invention is significantly improved. The surround of the embodiment of the present invention, combined with the improved voice coil, reduces distortion from 35% to 15%, a significant improvement.

[0041] Reference Attachment Figure 7 and attached Figure 8 , attached Figure 7 Schematic diagram of the working state of the folding ring in the first movement direction according to an embodiment of the present invention, Figure 8 FIG. 1 is a schematic diagram of the working state of the folding ring in the second movement direction according to an embodiment of the present invention. Figure 7 and attached Figure 8It can be seen that when the side of the fold ring close to the center vibrates up and down, the apex of the raised portion of the fold ring moves horizontally, that is, under large amplitude, the highest point of the fold ring in 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 conducive to the optimization of the space design.

[0042] In a second aspect, the present invention provides a sound diaphragm (not shown in the figures), which includes the folding ring 100 as described above.

[0043] 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.

[0044] Specifically, the first connecting portion 20 of the rim 100 is connected to the outer edge of the spherical top along the circumference of the spherical top, thereby achieving the connection between the rim 100 and the spherical top.

[0045] In a third aspect, the present invention provides a sound-generating device, comprising the sound diaphragm described above. The sound-generating device in this embodiment may be a loudspeaker.

[0046] 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, audio equipment and other fields.

[0047] Those skilled in the art will appreciate that the above embodiments are specific embodiments for implementing the present invention, and that in actual applications, various changes may be made 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, wherein the raised portion is convex on a side facing the fold ring, the raised portion is concave on a side close to the center of the fold ring and away from the center of the fold ring, and the raised portion is convex on a side away from the center of the fold ring and away from the center of the fold ring; The raised portion includes a first raised segment, a second raised segment, and a third raised segment sequentially connected in a direction away from the center of the fold ring, wherein the first raised segment is concave in the direction away from the center of the fold ring, and the third raised segment is convex in the direction away from the center of the fold ring; The second convex section is convex in a direction away from the folding ring; The first convex segment, the second convex segment and the third convex segment are all annular structures.

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

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

4. A sound film, characterized in that The diaphragm comprises a surround according to any one of claims 1 to 3.

5. The sound diaphragm according to claim 4, characterized in that The sound membrane includes a dome located in the center, and the folding ring is arranged around the dome.

6. A sound-generating device, characterized in that: The sound-generating device includes the sound membrane according to claim 5 .

7. An electronic device, characterized in that: The electronic device comprises the sound-generating device according to claim 6.

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