Loudspeaker and sound cone thereof

Abstract

The invention discloses a loudspeaker and a sound cone thereof. A cone of the loudspeaker comprises a main body and a surrounding piece, the surrounding piece surrounds the main body, the surrounding piece comprises an inner connecting edge, a reinforcing ring and an outer dangling edge which are sequentially arranged from inside to outside, the reinforcing ring is provided with a plurality of peak parts and a plurality of valley parts, the peak parts and the valley parts are located on the upper side and the lower side of the outer dangling edge respectively, and the peak parts arch upwards along the vibration axis of the loudspeaker. The plurality of valley parts are sunken downwards along the vibration axis, the plurality of peak parts and the plurality of valley parts are arranged in a staggered mode and connected into a ring shape, and the plurality of peak parts and the plurality of valley parts are obtained by forming elastic sheets; a connecting wall is arranged between the adjacent peak part and valley part, the connecting wall extends outwards from the outer edge of the main body when being observed along the vibration axis, and the extending direction of the connecting wall deviates from the central point of the main body. The surrounding piece of the sound cone has good strength while keeping good elasticity, the stability of the sound cone in the vibration process is ensured, and distortion caused by segmentation vibration is improved.

Description

Technical Field

[0001] The invention relates to a loudspeaker and a sound cone thereof. Background Art

[0002] The cone is a key component of a loudspeaker and has a direct impact on its performance. If the cone is not strong enough and has insufficient rigidity, the performance of the loudspeaker will be limited. Cones usually consist of a membrane-shaped main body and a surround that surrounds the main body. The cone is suspended on the speaker bracket via the surround. The main body needs to have good rigidity, while the surround needs to be elastic so that the cone can vibrate pistonically along the vibration axis under the drive of the voice coil and magnetic circuit to produce the desired sound. Currently, although the surround of the cone meets the elasticity requirements, its structure is relatively simple and lacks reinforcement design. It is prone to deformation during vibration, affecting the acoustic performance of the loudspeaker.

[0003] The above information disclosed in this Background section is only for enhancement of understanding of the background of the application and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art. Summary of the Invention

[0004] The present invention provides a sound cone of a loudspeaker, wherein a surround member thereof has good strength while maintaining good elasticity, thereby ensuring the stability of the sound cone during vibration and improving distortion caused by split vibration.

[0005] A first aspect of the present invention provides a speaker cone, comprising a main body and a surround, wherein the surround surrounds the main body, and the speaker cone is configured to be suspended on a speaker bracket through the surround; The surrounding member includes an inner connecting edge, a reinforcing ring and an outer hanging edge arranged in sequence from the inside to the outside, and the inner connecting edge is connected to the main body; The reinforcement ring has 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 are arched upward along the vibration axis of the speaker, and the valleys are recessed downward along the vibration axis. The peaks and the valleys are staggered and connected to form a ring, and the peaks and the valleys are formed from an elastic sheet. A connecting wall is provided between adjacent peaks and valleys. When viewed along the vibration axis, the connecting wall extends outward from the outer edge of the main body, and the extending direction of the connecting wall deviates from the center point of the main body.

[0006] In a preferred embodiment, the peak portion and / or the valley portion has reinforcing ribs.

[0007] In a more preferred embodiment, the reinforcing rib on the peak portion includes a downwardly recessed groove, an extension direction of the groove is parallel to an extension direction of the connecting wall, and both the groove and the peak portion are located above the outer hanging edge.

[0008] In a more preferred embodiment, the reinforcing rib on the valley portion includes an upwardly protruding ridge, the extension direction of the ridge is parallel to the extension direction of the connecting wall, and the ridge and the valley portion are both located below the outer hanging edge.

[0009] In a preferred embodiment, the connecting wall has an intersection with the inner connecting edge, and an extension direction of the connecting wall forms an angle with a diameter of the inner connecting edge passing through the intersection, and the angle is greater than or equal to 90 degrees.

[0010] In a more preferred embodiment, one of the peaks is connected to a valley through a first connecting wall, and the peak is connected to another valley through a second connecting wall, and the angle corresponding to the first connecting wall and the angle corresponding to the second connecting wall are equal or have a difference of less than 5 degrees.

[0011] In a preferred embodiment, the surrounding member is formed from an integral elastic sheet with uniform thickness.

[0012] In a preferred embodiment, the main body includes a reference portion and a load portion that protrudes upward or is recessed downward relative to the reference portion. When viewed along the vibration axis, the load portion is a centrally symmetrical shape.

[0013] In a more preferred embodiment, the main body is formed by pressing from a single piece of uniform thickness.

[0014] In a more preferred embodiment, the main body is in a truncated cone shape, the material of the main body includes paper fibers, and the material of the surrounding member is rubber.

[0015] A second aspect of the present invention provides a loudspeaker comprising the above-mentioned loudspeaker cone.

[0016] The present invention adopts the above solution and has the following advantages compared with the prior art: The speaker cone of the present invention has a surround member with a reinforcement ring composed of multiple peaks and valleys that are staggered and connected, and the peaks are higher than the outer hanging edge, and the valleys are lower than the outer hanging edge, which enhances the rigidity and strength of the surround member, avoids deformation of the cone during vibration, improves the acoustic performance of the speaker, and solves the distortion problem caused by the split vibration phenomenon. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 4 is a three-dimensional diagram of a speaker cone according to an embodiment of the present invention.

[0019] Figure 2 FIG. 4 is another perspective view of a speaker cone according to an embodiment of the present invention.

[0020] Figure 3 FIG. 4 is a top view of a speaker cone according to an embodiment of the present invention.

[0021] Figure 4 for Figure 3 Cross-sectional view along the AA axis.

[0022] Figure 5 3D is a three-dimensional diagram of a surround according to an embodiment of the present invention.

[0023] Figure 6 2 is a side view of a surround according to an embodiment of the present invention.

[0024] Figure 7 1 is a top view of a surround according to an embodiment of the present invention.

[0025] Figure 8 for Figure 7 Cross-sectional view along the BB direction.

[0026] Figure 9 FIG. 4 is a stereoscopic diagram of a loudspeaker according to an embodiment of the present invention.

[0027] Figure 10 This is a stereogram of a speaker for comparative example.

[0028] Figure 11a and Figure 11b Graph showing the displacement distribution of the cone at a certain moment in the comparative example and the embodiment.

[0029] Figure 12a and Figure 12b 1 and 2 are the sound pressure level curves of the speakers in the comparative example and the embodiment.

[0030] Figure 13a and Figure 13b It is a colored diagram of the amplitude of the cone at a certain moment in the comparative example and the embodiment.

[0031] In the above figures, 100, speaker; 200, cone; 300, bracket; 200', cone; 1. Main body; 11. Reference part; 12. Load part; 2. Surrounding part; 21. Inner connecting edge; 22. Reinforcement ring; 221. Peak; 222. Valley; 223. Connecting wall; 224. Reinforcement rib; 23. Outer hanging edge. DETAILED DESCRIPTION

[0032] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings to make the advantages and features of the present invention more easily understood by those skilled in the art. It should be noted that the description of these embodiments is intended to facilitate understanding of the present invention and does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0033] In this document, the terms "inside" and "outside" are defined with reference to the speaker, with the direction closer to the speaker considered inside and the direction farther away from the speaker considered outside. The directional terms "upper," "lower," and "horizontal" are intended to facilitate understanding of the structure of the vehicle-mounted sound system and are not intended to limit the state of the vehicle-mounted sound system after installation. For example, the vehicle-mounted sound system can be installed on a horizontal, inclined, or vertical surface of a vehicle. Example

[0034] Figures 1 to 8 An embodiment of a speaker cone is shown. Figure 9 An embodiment of a speaker is shown. The speaker is typically a vehicle-mounted speaker, such as a pedestrian warning device, a vehicle-mounted woofer, or a vehicle-mounted subwoofer.

[0035] Combine 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 suspended on the bracket 300 of the loudspeaker 100 through the surround 2. In the example shown in the accompanying drawings, the main body 1 is a cone in the shape of a truncated cone, and a central hole for connecting the voice coil is provided in the middle of the main body 1. The central hole 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 must meet certain elasticity requirements, and its elasticity must 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 must meet certain stiffness requirements and is not easily deformed during vibration. The material of the main body 1 can include paper fibers, for example, formed by pulp papermaking and then coated with a coating for waterproofing and hardening. In some other embodiments, the material of the main body 1 can also be a fiber fabric coated with a resin coating (such as a heat-setting resin).

[0036] Reference Figures 5 to 8The surrounding member 2 includes an inner connecting edge 21, a reinforcing ring 22, and an outer hanging edge 23 arranged in sequence from the inside to the outside. The inner connecting edge 21 is connected to the main body 1, and the inner connecting edge 21 can be a shape that matches the outer edge of the main body 1. For example, in the example shown in the accompanying drawings, the lower surface of the inner connecting edge 21 is a conical surface, and the lower surface is attached to the outer edge of the main body 1 by glue or the like. Figure 4 As shown. The outer overhang 23 is fixed to the bracket 300 of the speaker 100, for example, by gluing. In the example shown in the drawings, the outer overhang 23 is positioned in a horizontal plane (perpendicular to the vibration axis Z of the speaker 100), so that it can be aligned with the upper surface of the bracket 300. The reinforcement ring 22 is integrally formed between the inner connecting edge 21 and the outer overhang 23 and can rise and fall along the vibration axis Z of the speaker 100.

[0037] The reinforcement ring 22 has multiple peaks 221 and multiple valleys 222. The peaks 221 are evenly spaced along the circumference of the reinforcement ring 22, while the valleys 222 are evenly spaced along the circumference of the reinforcement ring 22. The peaks 221 and valleys 222 are staggered, meaning that a valley 222 separates adjacent peaks 221 between every two peaks 221, and a peak 221 separates adjacent valleys 222 between every two valleys 222. The peaks 221 and valleys 222 are connected end to end to form a circular ring. The peaks 221 and valleys 222 form an alternating undulating structure, with the peaks 221 and valleys 222 located on the upper and lower sides of the outer flange 23, respectively. The peaks 221 arch upward along the vibration axis Z of the speaker 100, while the valleys 222 are recessed downward along the vibration axis Z. Specifically, in the example shown in the accompanying drawings, Figure 8 As shown, the peak portion 221 arches upward from the horizontal plane where the outer hanging edge 23 is located, and the valley portion 222 is recessed downward from the horizontal plane where the outer hanging edge 23 is located. The reinforcing ring 22 has a square wave-like structure as a whole.

[0038] The multiple peaks 221 and valleys 222 are formed from an elastic sheet. Furthermore, the surround 2 is formed from a single piece of elastic sheet with uniform thickness. During the forming process, portions of the elastic sheet are hot-pressed upward to form the upwardly arched peaks 221, while other portions are hot-pressed downward to form the downwardly concave valleys 222. The thickness of the surround 2 after forming is also substantially uniform.

[0039] There is a connecting wall 223 between adjacent peaks 221 and valleys 222. Figure 7As shown, when viewed along the vibration axis Z, the connecting wall 223 extends outward from the outer edge of the main body 1, and the extension direction of the connecting wall 223 deviates from the center point of the main body 1. The connecting wall 223 intersects with the inner edge of the outer cantilever 23 and the outer edge of the inner connecting edge 21 at two points, respectively. The direction passing through these two points is defined as the extension direction of the connecting wall 223. The point where the connecting wall 223 intersects with the outer edge of the inner connecting edge 21 is recorded as the intersection point. The extension direction of the connecting wall 223 forms an angle with the diameter of the inner connecting edge 21 (main body 1) passing through the intersection point, and the angle is greater than or equal to 90 degrees. In one example, the angle is 90 degrees, that is, the connecting wall 223 extends in a direction tangent to the inner connecting edge 21; in other examples, the angle is greater than 90 degrees.

[0040] Furthermore, one of the peaks 221 is connected to a valley 222 via a first connecting wall, and the peak 221 is connected to the other valley 222 via a second connecting wall, and the angle corresponding to the first connecting wall and the angle corresponding to the second connecting wall are equal or have a difference of less than 5 degrees. In the direction along the vibration axis Z of the speaker 100, the plane where the connecting wall 223 is located can be parallel to the vibration axis Z, or can be obliquely intersected. Specifically in the example shown in the accompanying drawings, the plane where the first connecting wall is located is parallel to the vibration axis Z, that is, the plane of the first connecting wall is a vertical plane, and the plane where the second connecting wall is located is obliquely intersected with the vibration axis Z. When observed along the vibration axis Z, the first connecting wall can be seen, as shown in FIG. Figure 7 shown.

[0041] Reinforcing ribs 224 may be provided on the peak portion 221 and / or the valley portion 222. In the example shown in the accompanying drawings, the reinforcing ribs 224 on the peak portion 221 comprise downwardly concave grooves extending parallel to the direction of extension of the connecting wall 223. Both the grooves and the peak portion 221 are located above the outer overhang 23. The depth of the downwardly concave grooves is much less than the height of the peak portion 221. In other examples, the reinforcing ribs on the valley portion 222 comprise upwardly protruding ridges extending parallel to the direction of extension of the connecting wall 223. Both the ridges and the valley portion are located below the outer overhang 23.

[0042] The main body 1 includes a base portion 11 and a load portion 12 that projects upward or is recessed relative to the base portion 11. The load portion 12 is centrally symmetrical when viewed along the vibration axis Z, specifically with the center point (circle center) of the main body 1 as the center of symmetry. The main body 1 can be formed by pressing a single, uniformly thick sheet (pulp sheet, fabric, non-woven fabric, etc.). In this embodiment, the load portion 12 projects upward relative to the base portion 11.

[0043] Reference Figure 9The speaker 100 includes a bracket 300, a cone 200, a voice coil, and a magnetic circuit (not shown in the figure). The bracket 300 can be installed on the body of the vehicle, and the bracket 300 can be provided with a plurality of screw holes for installation. The outer cantilever 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 on 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. The coil part of the voice coil is inserted into the magnetic gap of the magnetic circuit. When the voice coil is connected to the electrical signal, under the action of the magnetic field of the magnetic circuit, the voice coil will drive the diaphragm to vibrate up and down along the vibration axis Z to achieve electroacoustic conversion. Comparative Example

[0044] Reference Figure 10 The only difference between the comparative example speaker 100 and the embodiment is the shape of the surround reinforcement ring in the cone 200'. In the comparative example, the surround reinforcement ring does not have a valley; it is an overall arc with an upward arch in the middle. The surround material and dimensions are the same as in Example 1. The bracket 300 is identical to that in the embodiment. Performance testing:

[0045] The two loudspeakers 100 of the embodiment and the comparative example were simulated and tested under the same test conditions and with the same excitation signal, and the results are as follows.

[0046] (1) COMSOL simulation test: Figure 11a FIG. 2 shows the displacement distribution diagram of the midrange cone 200 of the comparative example at a certain moment. Figure 11b FIG. 2 shows a displacement distribution diagram of the cone 200 at the same time in the embodiment.

[0047] (2) Sound pressure level test: Figure 12a : shows the sound pressure level curve of the speaker 100 of the comparative example, Figure 12b FIG. 2 shows a sound pressure level curve of the loudspeaker 100 according to the embodiment.

[0048] (3) Amplitude sweep test: Figure 13a The amplitude coloring diagram of the midrange cone of the comparative example at a certain moment is shown. Figure 13b The amplitude coloring diagram of the cone at a certain moment in the embodiment is shown.

[0049] The amplitude shading chart is based on the direction and amplitude of the cone's vibration. The forward (upward) cone is colored blue, while the backward (downward) cone is colored red. Unchanged areas remain white, with darker colors indicating greater amplitude. When the cone's amplitude is greatest, either forward or backward, it appears intensely blue or red.

[0050] When the comparative cone vibrates downward, the effective radiation surface area of ​​the cone and surround increases; conversely, when the cone vibrates upward, the radiation surface area decreases, see Figure 11a This effective area deviation is the direct factor that causes distortion. In the embodiment, the surround 2 is optimized by setting a plurality of peaks 221 and valleys 222 arranged in an up-and-down staggered manner. Figure 11a When the cone vibrates upward, the outer edge of the surround 2 also serves as an effective radiation area, which reduces the separation vibration to a minimum and significantly reduces the distortion of the speaker 100 in the entire sound range (especially the mid-range frequency band).

[0051] See also Figures 12a to 12b , comparing the changes in the sound pressure level curves of the two paper cones in the frequency range of 100Hz~10KHz, it can be seen that the comparison example has a valley point at 3375Hz, and the embodiment has a valley point at 2871Hz. The two valley points are caused by the split vibration generated by the woofer during the vibration process. By comparing the curves of the two different cones, it can be found that the valley point of the embodiment cone is shallower than that of the comparison example cone, and the fluctuation of the embodiment cone for the entire sound pressure level curve is smaller than that of the comparison example cone. The sound pressure level (SPL) at the valley point in the embodiment is reduced by about 12dB, and the sound pressure level at the valley point in the comparison example is reduced by about 20dB, which shows that the improvement effect of the embodiment cone on the split vibration is better than that of the comparison example cone. Combined with Figure 13a and Figure 13b From the amplitude colored diagram, it can be seen that during the vibration of the sound cone, due to the special design structure of the sound cone in the embodiment, all the vibration points of the sound cone are "broken up", which disperses the vibration energy and suppresses local resonance, which is conducive to reducing split vibration.

[0052] The surround 2 of the speaker cone 200 of the embodiment adopts a design of peaks 221 and valleys 222 that are staggered up and down, wherein the upwardly protruding peak 221 is higher than the outer hanging edge 23, and the downwardly recessed valley 222 is lower than the outer hanging edge 23, thereby enhancing the rigidity of the surround 2. In addition, the structure of the small reinforcing ribs 224 provided on the peaks 221 or the valleys 222 further enhances the strength of the surround 2. The cone adopts a load-bearing structure, and the load mechanism itself is formed into an equally divided structure through high-temperature pressing, which improves the rigidity and strength of the main body 1. Through the above structure, the speaker cone 200 has higher rigidity and strength, effectively improving the performance of the vehicle-mounted speaker 100, solving the problem of insufficient strength and rigidity of the speaker cone in the prior art, ensuring the stability of the speaker cone 200 during vibration, reducing split vibration, and making the acoustic performance of the speaker 100 more stable and excellent.

[0053] As shown in this specification and claims, the terms "comprise" and "include" only indicate the inclusion of the steps and elements that have been explicitly identified, and these steps and elements do not constitute an exclusive list. The method or apparatus may also include other steps or elements.

[0054] It is further understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar.

[0055] It will be further understood that the terms "first," "second," and the like are used to describe various types of information, but such information should not be limited to these terms. These terms are used solely to distinguish information of the same type from one another and do not indicate a particular order or level of importance. In fact, the terms "first," "second," and the like are fully interchangeable. For example, first information could be referred to as second information, and similarly, second information could be referred to as first information without departing from the scope of this disclosure.

[0056] The above embodiment is only for illustrating the technical concept and features of the present invention and is a preferred embodiment. Its purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the scope of protection of the present invention.

Claims

1. A speaker cone, comprising a main body and a surround, wherein the surround surrounds the main body, and the speaker cone is configured to be suspended on a speaker bracket via the surround; It is characterized by: The surrounding member includes an inner connecting edge, a reinforcing ring and an outer hanging edge arranged in sequence from the inside to the outside, and the inner connecting edge is connected to the main body; The reinforcement ring has 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 are arched upward along the vibration axis of the speaker, and the valleys are recessed downward along the vibration axis. The peaks and the valleys are staggered and connected to form a ring, and the peaks and the valleys are formed from an elastic sheet. A connecting wall is provided between adjacent peaks and valleys. When viewed along the vibration axis, the connecting wall extends outward from the outer edge of the main body, and the extending direction of the connecting wall deviates from the center point of the main body.

2. The speaker cone according to claim 1, characterized in that The peak portion and / or the valley portion are provided with reinforcing ribs.

3. The speaker cone according to claim 2, characterized in that The reinforcing rib on the peak portion includes a downwardly concave groove, the extension direction of the groove is parallel to the extension direction of the connecting wall, and the groove and the peak portion are both located above the outer hanging edge.

4. The speaker cone according to claim 2, characterized in that The reinforcing rib on the valley portion includes an upwardly protruding ridge, the extending direction of the ridge is parallel to the extending direction of the connecting wall, and the ridge and the valley portion are both located below the outer hanging edge.

5. The speaker cone according to claim 1, characterized in that The connecting wall has an intersection with the inner connecting edge, and an extending direction of the connecting wall forms an angle with a diameter of the inner connecting edge passing through the intersection, and the angle is greater than or equal to 90 degrees.

6. The speaker cone according to claim 5, characterized in that One of the peaks is connected to a valley through a first connecting wall, and the peak is connected to the other valley through 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 of less than 5 degrees.

7. The speaker cone according to claim 1, characterized in that The surrounding piece is formed from an integral elastic sheet material with uniform thickness.

8. The speaker cone according to claim 1, wherein: The main body includes a reference portion and a load portion that protrudes upward or is recessed downward relative to the reference portion. When viewed along the vibration axis, the load portion is a centrally symmetrical shape.

9. The speaker cone according to claim 8, characterized in that The main body is formed by pressing a single piece of uniform thickness sheet.

10. The speaker cone according to claim 8, characterized in that The main body is in a truncated cone shape. The material of the main body includes paper fibers, and the material of the surrounding piece is rubber.

11. A loudspeaker, characterized in that: A speaker cone comprising the speaker according to any one of claims 1 to 10.

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