A loudspeaker and a cone thereof

Abstract

The application discloses a loudspeaker and a cone thereof. The cone of the loudspeaker comprises a main body and a surrounding part, the surrounding part surrounds the main body, the surrounding part comprises an inner connecting edge, a reinforcing ring and an outer hanging edge arranged in sequence from inside to outside, the reinforcing ring has a plurality of peak portions and a plurality of valley portions, the peak portions and the valley portions are respectively located on the upper and lower sides of the outer hanging edge, the plurality of peak portions are arched upward along a vibration axis of the loudspeaker, the plurality of valley portions are concave downward along the vibration axis, the plurality of peak portions and the plurality of valley portions are staggered and connected to form a ring shape, and the plurality of peak portions and the plurality of valley portions are obtained by forming an elastic sheet; the connecting wall is arranged between adjacent peak portions and valley portions, and the connecting wall extends outward from the outer edge of the main body along the vibration axis, and the extension direction of the connecting wall deviates from the center point of the main body. The surrounding part of the cone has good strength while maintaining good elasticity, the stability of the cone in the vibration process is ensured, and the distortion caused by the segmented vibration is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to a loudspeaker and a cone thereof. BACKGROUND

[0002] The cone is a key component of the loudspeaker, and has a direct impact on the performance of the loudspeaker. If the strength and rigidity of the cone are insufficient, the performance of the loudspeaker will be limited. The cone generally comprises a main body in the form of a membrane and a surrounding member surrounding the main body, and the cone is suspended on the support of the loudspeaker through the surrounding member. The main body needs to have good rigidity, and the surrounding member needs to have elasticity, so that the cone can perform piston vibration along the vibration axis under the driving of the voice coil and the magnetic circuit to emit the expected sound. At present, although the surrounding member of the cone meets the requirement of elasticity, the structure is relatively simple and lacks strengthening design, and deformation is likely to occur during vibration, affecting the acoustic performance of the loudspeaker.

[0003] The above information disclosed in the background section is only for the purpose of enhancing the understanding of the background of the present application, and therefore it can include information that does not constitute the prior art known to those of ordinary skill in the art. SUMMARY

[0004] The present application provides a cone of a loudspeaker, which has good strength while maintaining good elasticity, ensuring the stability of the cone during vibration and improving the distortion caused by split vibration.

[0005] A first aspect of the present application provides a cone of a loudspeaker, comprising a main body and a surrounding member, the surrounding member surrounding the main body, the cone being configured to be suspended on a support of the loudspeaker through the surrounding member;

[0006] The surrounding member comprises an inner connecting edge, a reinforcing ring and an outer suspension edge arranged in sequence from inside to outside, and the inner connecting edge is connected to the main body;

[0007] The reinforcing ring has a plurality of peak portions and a plurality of valley portions, the peak portions and the valley portions being located on the upper and lower sides of the outer suspension edge respectively, the plurality of peak portions being arched upward along a vibration axis of the loudspeaker, the plurality of valley portions being concave downward along the vibration axis, the plurality of peak portions and the plurality of valley portions being arranged alternately and connected to form a ring shape, and the plurality of peak portions and the plurality of valley portions being formed by an elastic sheet material;

[0008] Adjacent peak portions and valley portions have a connecting wall, which extends outward from the outer edge of the main body along the vibration axis, and the extension direction of the connecting wall deviates from the center point of the main body.

[0009] In a preferred embodiment, the peak portions and / or the valley portions have reinforcing ribs thereon.

[0010] In a more preferred embodiment, the ribs on the peaks comprise downwardly recessed grooves, the grooves extending parallel to the extension of the connecting walls, the grooves and the peaks being both above the outer overhang.

[0011] In a more preferred embodiment, the ribs on the valleys comprise upwardly protruding ridges, the ridges extending parallel to the extension of the connecting walls, the ridges and the valleys being both below the outer overhang.

[0012] In a preferred embodiment, the connecting walls have an intersection with the inner connecting edge, the connecting walls extending at an angle with a diameter of the inner connecting edge passing through the intersection, the angle being greater than or equal to 90 degrees.

[0013] In a more preferred embodiment, one of the peaks is connected to one valley by a first connecting wall, the peak being connected to another valley by a second connecting wall, the angle corresponding to the first connecting wall and the angle corresponding to the second connecting wall being equal or having a difference of less than 5 degrees.

[0014] In a preferred embodiment, the surround is obtained by molding from a single elastic sheet of uniform thickness.

[0015] In a preferred embodiment, the main body comprises a reference portion and a load portion protruding upwardly or recessed downwardly with respect to the reference portion, the load portion being a central symmetric figure when viewed along the vibration axis.

[0016] In a more preferred embodiment, the main body is obtained by pressing from a single sheet of uniform thickness.

[0017] In a more preferred embodiment, the main body is frustoconical, the material of the main body comprises paper fibers, and the material of the surround is rubber.

[0018] A second aspect of the present application provides a loudspeaker comprising the cone of the loudspeaker.

[0019] The present application has the following advantages compared to the prior art by adopting the above scheme:

[0020] The cone of the loudspeaker of the present application has a surround with a reinforcing ring composed of a plurality of peaks and valleys alternating and connected, the peaks being above the outer overhang and the valleys being below the outer overhang, which enhances the rigidity and strength of the surround, avoids deformation of the cone during vibration, improves the acoustic performance of the loudspeaker, and solves the distortion problem caused by the segmented vibration phenomenon. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to make the technical solutions of the present application clearer, the drawings needed in the following embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0022] Figure 1 A perspective view of a speaker cone according to an embodiment of the present application.

[0023] Figure 2 Another perspective view of a speaker cone according to an embodiment of the present application.

[0024] Figure 3 A top view of a speaker cone according to an embodiment of the present application.

[0025] Figure 4 A perspective view of a surround according to an embodiment of the present application. Figure 3 A sectional view in direction A-A.

[0026] Figure 5 A perspective view of a surround according to an embodiment of the present application.

[0027] Figure 6 A side view of a surround according to an embodiment of the present application.

[0028] Figure 7 A top view of a surround according to an embodiment of the present application.

[0029] Figure 8 A sectional view in direction B-B. Figure 7 A sectional view in direction B-B.

[0030] Figure 9 A perspective view of a speaker according to an embodiment of the present application.

[0031] Figure 10 A perspective view of a speaker according to a comparative example.

[0032] Figure 11a A perspective view of a speaker according to a comparative example. Figure 11b A displacement distribution diagram of a cone at a certain moment in time according to a comparative example and an embodiment.

[0033] Figure 12a A displacement distribution diagram of a cone at a certain moment in time according to a comparative example and an embodiment. Figure 12b A sound pressure level curve of a speaker according to a comparative example and an embodiment.

[0034] A sound pressure level curve of a speaker according to a comparative example and an embodiment. Figure 13a A sound pressure level curve of a speaker according to a comparative example and an embodiment. Figure 13b An amplitude coloration diagram of a cone at a certain moment in time according to a comparative example and an embodiment.

[0035] In the above drawings,

[0036] 100, loudspeaker; 200, cone; 300, support; 200', cone;

[0037] 1, main body; 11, reference part; 12, load part;

[0038] 2, surround; 21, inner connecting edge; 22, reinforcing ring; 221, peak; 222, valley; 223, connecting wall; 224, reinforcing rib; 23, outer hanging edge. DETAILED DESCRIPTION

[0039] The preferred embodiments of the present application will be described in detail with reference to the drawings, so that the advantages and features of the present application can be more easily understood by those skilled in the art. It should be noted that the description of the embodiments is for the purpose of understanding the present application, and does not constitute a limitation of the present application. In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0040] In this article, "inner" and "outer" are defined with reference to the loudspeaker, with the orientation closer to the loudspeaker being inner, and vice versa. The orientation words "upper", "lower", and "horizontal" are intended to facilitate the understanding of the structure of the vehicle-mounted sound device by those skilled in the art, and are not used to limit the state of the vehicle-mounted sound device after it is installed into the use scene. For example, the vehicle-mounted sound device can be installed on a horizontal surface, an inclined surface, or a vertical surface of a vehicle. EMBODIMENT

[0041] Figures 1 to 8 An embodiment of a cone of a loudspeaker is shown, Figure 9 An embodiment of a loudspeaker is shown, which is typically a vehicle-mounted loudspeaker, such as a pedestrian warning device, a vehicle-mounted subwoofer, or a vehicle-mounted bass.

[0042] COMBINATION Figures 1 to 9 As shown, the cone 200 of the loudspeaker 100 includes a main body 1 and a surround 2, and the surround 2 surrounds the main body 1. The cone 200 is configured to be hung on the support 300 of the loudspeaker 100 through the surround 2. In the example shown in the drawings, the main body 1 is a truncated cone-shaped cone, a central hole for connecting a voice coil is provided in the middle of the main body 1, which can be covered by a dust cap connected to the main body 1, and the surround 2 is a circular ring structure surrounding the main body 1. The material of the surround 2 needs to meet certain elasticity requirements, and its elasticity needs to be at least better than that of the main body 1, for example, the material of the surround 2 can be rubber. The main body 1 needs to meet certain rigidity requirements and is not easy to deform when vibrating, and the material of the main body 1 can include paper fibers, for example, formed by paper pulp papermaking and then coated with a coating layer for waterproofing and hardening treatment. In other embodiments, the material of the main body 1 can also be a fiber fabric coated with a resin coating layer (such as a thermosetting resin).

[0043] REFERENCEFigures 5 to 8 The surround 2 comprises, from inside to outside, an inner connecting edge 21, a reinforcing ring 22, and an outer overhanging edge 23. The inner connecting edge 21 is connected to the main body 1, and can be shaped to match the outer edge of the main body 1. For example, in the example shown in the drawings, the lower surface of the inner connecting edge 21 is a conical surface, which is attached to the outer edge of the main body 1 by means of glue or the like, as shown in Figure 4 The outer overhanging edge 23 is fixed to the support 300 of the loudspeaker 100, for example by means of glue. In the example shown in the drawings, the outer overhanging edge 23 is positioned in a horizontal plane (perpendicular to the vibration axis Z of the loudspeaker 100), so as to be able to be attached to the upper surface of the support 300. The reinforcing ring 22 is integrally formed between the inner connecting edge 21 and the outer overhanging edge 23, and is able to move up and down along the vibration axis Z of the loudspeaker 100.

[0044] The reinforcing ring 22 has a plurality of peak portions 221 and a plurality of valley portions 222, the plurality of peak portions 221 being arranged at equal intervals along the circumferential direction of the reinforcing ring 22, and the plurality of valley portions 222 being arranged at equal intervals along the circumferential direction of the reinforcing ring 22. The plurality of peak portions 221 and the plurality of valley portions 222 are arranged alternately, i.e. there is one valley portion 222 between every two peak portions 221, and the adjacent peak portions 221 are separated by the valley portion 222; and there is one peak portion 221 between every two valley portions 222, and the adjacent valley portions 222 are separated by the peak portion 221. The plurality of peak portions 221 and the plurality of valley portions 222 are connected end to end to form a circular ring. The plurality of peak portions 221 and the plurality of valley portions 222 form an alternating structure, in which the peak portions 221 and the valley portions 222 are respectively located on the upper and lower sides of the outer overhanging edge 23. The plurality of peak portions 221 are arched upwards along the vibration axis Z of the loudspeaker 100, and the plurality of valley portions 222 are concave downwards along the vibration axis Z. In the example shown in the drawings, as shown in Figure 8 the peak portions 221 are arched upwards from the horizontal plane of the outer overhanging edge 23, the valley portions 222 are concave downwards from the horizontal plane of the outer overhanging edge 23, and the reinforcing ring 22 as a whole has a square wave-like structure.

[0045] The plurality of peak portions 221 and the plurality of valley portions 222 are formed by a resilient sheet material. Further, the surround 2 is formed by a single resilient sheet material having a uniform thickness, and in the forming process, some local parts of the resilient sheet material are hot-pressed upwards to form the peak portions 221 which are deformed to be arched upwards, and other local parts of the resilient sheet material are hot-pressed downwards to form the valley portions 222 which are deformed to be concave downwards. The thickness of the surround 2 after forming is also substantially uniform.

[0046] The adjacent peak portions 221 and valley portions 222 have connecting walls 223 therebetween. As shown in Figure 7As shown, the connecting wall 223 extends outwardly from the outer edge of the main body 1 and the extending direction of the connecting wall 223 deviates from the center point of the main body 1, as viewed along the vibration axis Z. The extending direction of the connecting wall 223 is defined as the direction passing through the two points where the connecting wall 223 and the inner edge of the outer overhanging edge 23, the outer edge of the inner connecting edge 21 respectively intersect. The point where the connecting wall 223 and the outer edge of the inner connecting edge 21 intersect is referred to as the intersection point. The extending direction of the connecting wall 223 and the diameter of the inner connecting edge 21 (of the main body 1) passing through the intersection point form an angle, which is greater than or equal to 90 degrees. In one example, the angle is 90 degrees, i.e. the connecting wall 223 extends along a direction tangential to the inner connecting edge 21; in other examples, the angle is greater than 90 degrees.

[0047] Further, one of the peak 221 and one of the valley 222 are connected by a first connecting wall, and the other of the peak 221 and the other of the valley 222 are connected by a second connecting wall. The angle corresponding to the first connecting wall and the angle corresponding to the second connecting wall are equal or have a difference less than 5 degrees. The plane where the connecting wall 223 is located can be parallel to the vibration axis Z or can be obliquely intersected with the vibration axis Z, as viewed along the vibration axis Z of the loudspeaker 100. In the example shown in the drawings, the plane where the first connecting wall is located is parallel to the vibration axis Z, i.e. the plane where the first connecting wall is located is a vertical plane, and the plane where the second connecting wall is located is obliquely intersected with the vibration axis Z. As viewed along the vibration axis Z, the first connecting wall is visible, as shown in Figure 7

[0048] The peak 221 and / or the valley 222 can have a reinforcing rib 224. In the example shown in the drawings, the reinforcing rib 224 on the peak 221 comprises a downwardly recessed groove, the extending direction of the groove is parallel to the extending direction of the connecting wall 223, and the groove and the peak 221 are both located above the outer overhanging edge 23. The depth of the downwardly recessed groove is much smaller than the height of the peak 221. In other examples, the reinforcing rib on the valley 222 comprises an upwardly protruding ridge, the extending direction of the ridge is parallel to the extending direction of the connecting wall 223, and the ridge and the valley are both located below the outer overhanging edge 23.

[0049] The main body 1 comprises a reference portion 11 and a load portion 12 which is protruded upwardly or recessed downwardly relative to the reference portion 11. As viewed along the vibration axis Z, the load portion 12 is a central symmetric figure, and the center point (the center of the circle) of the main body 1 is the center of symmetry. The main body 1 can be formed by pressing a one-piece sheet material (pulp sheet, fabric, non-woven fabric, etc.) having uniform thickness. In the present embodiment, the load portion 12 is protruded upwardly relative to the reference portion 11.

[0050] Referring to Figure 9 ​The loudspeaker 100 comprises a bracket 300, a cone 200, a voice coil and a magnetic circuit (not shown in the figure) and the like. The bracket 300 can be mounted to the vehicle body, and a plurality of screw holes for mounting can be provided on the bracket 300. The outer suspension edge 23 of the surround 2 of the cone 200 is fixed to the upper end surface of the bracket 300, so that the cone 200 is suspended on the bracket 300. The voice coil and the magnetic circuit are arranged in the bracket 300, the magnetic circuit is fixed to the bracket 300 to provide a magnetic field, the upper end of the voice coil is fixed to the main body 1 of the cone 200, and the coil part of the voice coil is inserted into the magnetic gap of the magnetic circuit. When the voice coil is connected to an electrical signal, the diaphragm will vibrate up and down along the vibration axis Z under the action of the magnetic field of the magnetic circuit, realizing the electro-acoustic conversion. Comparative Example

[0051] Reference Figure 10 The loudspeaker 100 of the comparative example differs from the embodiment only in the shape of the reinforcing ring of the surround in the cone 200'. In the comparative example, the reinforcing ring of the surround does not include a valley, and the whole is an arc shape with the middle part arched upward. The material and size of the surround are the same as in Example 1. The bracket 300 is exactly the same as in the embodiment.

[0052] Performance test:

[0053] The two loudspeakers 100 of the embodiment and the comparative example were tested under the same test conditions, the same excitation signal was used, and the results are as follows.

[0054] (1) COMSOL simulation test:

[0055] Figure 11a The displacement distribution diagram of the cone 200 in the comparative example at a certain moment is shown, Figure 11b The displacement distribution diagram of the cone 200 in the embodiment at the same moment is shown.

[0056] (2) Sound pressure level test:

[0057] Figure 12a The sound pressure level curve of the loudspeaker 100 of the comparative example is shown, Figure 12b The sound pressure level curve of the loudspeaker 100 of the embodiment is shown.

[0058] (3) Amplitude scanning test:

[0059] Figure 13a The amplitude color map of the cone at a certain moment in the comparative example is shown, Figure 13b The amplitude color map of the cone at a certain moment in the embodiment is shown.

[0060] In the amplitude coloration map, the amplitude coloration is based on the direction and amplitude of the cone vibration. The part of the cone moving forward (upward) is colored blue; the part of the cone moving backward (downward) is colored red; the area without change is still white. The darker the color, the greater the amplitude of the cone movement. When the amplitude of the part of the cone moving forward or backward is the largest, the cone presents a strong blue or red color.

[0061] When the cone of the comparative example vibrates downward, the effective radiation surface area of the cone and the surround increases; conversely, when the cone vibrates upward, the radiation surface area decreases, see Figure 11a . This effective area deviation is a direct factor causing distortion. In the embodiment, the surround 2 is optimized by being provided with a plurality of peaks 221 and valleys 222 arranged alternately upward and downward, see Figure 11a When the cone vibrates upward, the outer edge of the surround 2 is also partially an effective radiation area, reducing the separated vibration to a minimum, significantly reducing the distortion of the loudspeaker 100 in the entire sound range (especially in the midrange).

[0062] See Figures 12a to 12b , the sound pressure level curve of the two cones in the frequency band of 100Hz~10KHz can be seen. The comparative example has a valley point at 3375Hz, and the embodiment has a valley point at 2871Hz. The valley points at the two places are caused by the separated vibration of the bass loudspeaker in the vibration process. By comparing the curves of the two different cones, it can be found that the valley point of the cone of the embodiment is shallower than that of the cone of the comparative example, and the fluctuation of the sound pressure level curve of the cone of the embodiment is smaller than that of the cone of the comparative example. In the embodiment, the sound pressure level (SPL) at the valley point is reduced by about 12dB, and in the comparative example, the sound pressure level at the valley point is reduced by about 20dB, which shows that the improvement effect of the cone of the embodiment on the separated vibration is better than that of the cone of the comparative example. Combined with Figure 13a and Figure 13b the amplitude coloration map, it can be seen that during the vibration of the cone, due to the special design structure of the cone of the embodiment, the points of the cone vibration are in a "scattered" state, dispersing the vibration energy and suppressing local resonance, which is beneficial to reducing the separated vibration.

[0063] The surround 2 of the sound cone 200 of the embodiment adopts the design of up-and-down staggered peak portions 221 and valley portions 222, wherein the upwardly protruding peak portions 221 are higher than the outer suspension edge 23, and the downwardly recessed valley portions 222 are lower than the outer suspension edge 23, thereby enhancing the rigidity of the surround 2. In addition, the structure of the small reinforcing ribs 224 arranged on the peak portions 221 or the valley portions 222 further enhances the strength of the surround 2. The cone adopts the form of a load structure, and the load mechanism itself is in the form of an equal division structure by high-temperature pressing, thereby improving the rigidity and strength of the main body 1. Through the above structure, the sound cone 200 has high rigidity and strength, effectively improves the performance of the vehicle-mounted loudspeaker 100, solves the problem of insufficient strength and rigidity of the sound cone in the prior art, ensures the stability of the sound cone 200 in the vibration process, reduces the segmented vibration, and makes the acoustic performance of the loudspeaker 100 more stable and excellent.

[0064] As shown in the specification and claims, the terms "comprise" and "include" only indicate the inclusion of the steps and elements explicitly identified, and these steps and elements do not constitute an exclusive list, and the method or device can also include other steps or elements.

[0065] It can be further understood that "multiple" in the present disclosure means two or more, and other quantifiers are similar.

[0066] It can be further understood that the terms "first", "second", and the like are used to describe various information, but these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other, and do not represent a specific order or importance. In fact, the expressions of "first", "second", and the like can be completely interchangeable. For example, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information without departing from the scope of the present disclosure.

[0067] The above embodiments are only preferred embodiments for illustrating the technical concepts and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application.

Claims

1. A cone of a loudspeaker, comprising a main body and a surround, the surround surrounding the main body, the cone being configured to be hung on a support of the loudspeaker by the surround; characterized in that the surround comprising an inner connecting edge, a reinforcing ring and an outer hanging edge arranged in sequence from inside to outside, the inner connecting edge being connected to the main body; the reinforcing ring having a plurality of peaks and a plurality of valleys, the peaks and the valleys being located on the upper and lower sides of the outer hanging edge respectively, the peaks being arched upward along a vibration axis of the loudspeaker, the valleys being concave downward along the vibration axis, the peaks and the valleys being staggered and connected to form a ring, the peaks and the valleys being formed by an elastic sheet material; a connecting wall being between adjacent peaks and valleys, the connecting wall extending outward from an outer edge of the main body along the vibration axis, and the extending direction of the connecting wall deviating from a center point of the main body; the connecting wall having an intersection with the inner connecting edge, the extending direction of the connecting wall and a diameter of the inner connecting edge passing through the intersection forming an included angle, the included angle being greater than or equal to 90 degrees.

2. The cone of claim 1, wherein the peaks and / or the valleys having reinforcing ribs.

3. The cone of claim 2, wherein the reinforcing ribs on the peaks comprising downward concave grooves, the extending direction of the grooves being parallel to the extending direction of the connecting wall, the grooves and the peaks being located above the outer hanging edge.

4. The cone of claim 2, wherein the reinforcing ribs on the valleys comprising upward convex ridges, the extending direction of the convex ridges being parallel to the extending direction of the connecting wall, the convex ridges and the valleys being located below the outer hanging edge.

5. The cone of claim 1, wherein one of the peaks and one of the valleys being connected by a first connecting wall, the peak and another of the valleys being connected by a second connecting wall, the included angle corresponding to the first connecting wall and the included angle corresponding to the second connecting wall being equal or having a difference less than 5 degrees.

6. The cone of claim 1, wherein the surround being formed by an integral elastic sheet material with uniform thickness.

7. The cone of claim 1, wherein the main body comprising a reference portion and a load portion protruding upward or concave downward relative to the reference portion, the load portion being a central symmetric figure along the vibration axis.

8. The cone of a loudspeaker according to claim 7, wherein, the main body being formed by pressing an integral sheet material with uniform thickness.

9. The cone of claim 7, wherein the main body being in the shape of a truncated cone, the material of the main body comprising paper fiber, and the material of the surround being rubber.

10. A loudspeaker, characterized by a loudspeaker comprising the cone according to any one of claims 1 to 9.

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