Loudspeaker and automobile audio system

Abstract

A loudspeaker and an automobile audio system. The loudspeaker comprises a basket, a cone, a spider, a voice coil used for driving the cone to vibrate, and a magnetic circuit unit used for driving the voice coil to move, wherein the cone is provided with a centrally upwardly protruding conical portion, and the magnetic circuit unit is arranged below the cone; the loudspeaker further comprises a spider fixing ring; the spider fixing ring is connected to the basket, and the outer edge of the conical portion is fixed to the basket and / or the spider fixing ring; the outer edge of the spider is fixed to the spider fixing ring, and the inner edge of the spider is fixed on the conical portion. According to the loudspeaker of the present disclosure, the power is improved without additionally increasing the height / thickness.

Description

Loudspeaker and car audio system Related Applications

[0001] This application claims priority to Chinese patent application No. CN 2024208203234, filed on April 19, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present disclosure relates to a loudspeaker and a car audio system. BACKGROUND

[0003] Loudspeakers, especially car loudspeakers, are moving towards the concept of lightness, environmental protection and energy saving. The overall height of the loudspeaker is reduced compared to conventional loudspeakers, so it is widely used in some audio products with more space and volume restrictions. A damper is usually not provided on a conventional loudspeaker, because if a damper is provided on the voice coil, it will cause the overall height or thickness of the loudspeaker to increase. However, if the damper is not provided, the amplitude of the voice coil deviating from the vibration axis under the condition of high power may exceed the set range, which is easy to cause distortion, thereby limiting the power improvement of the loudspeaker.

[0004] 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 prior art known to those of ordinary skill in the art. SUMMARY

[0005] The purpose of the present disclosure relates to an improved loudspeaker which improves the power without additional increase in height / thickness. The present disclosure also relates to a car audio system employing the loudspeaker

[0006] One aspect of the present disclosure provides a loudspeaker comprising:

[0007] a basket;

[0008] a cone having a middle part upwardly convex cone;

[0009] a voice coil for driving the cone to vibrate;

[0010] a magnetic circuit unit for driving the voice coil to move, the magnetic circuit unit being disposed below the cone;

[0011] a damper; and

[0012] a damper fixing ring connected to the basket;

[0013] wherein an outer edge of the cone is connected to the basket and / or the damper fixing ring; an outer edge of the damper is connected to the damper fixing ring, and an inner edge of the damper is connected to the cone.

[0014] In some embodiments, the damper fixing ring has an annular upper fixing surface, and the outer edge of the damper is attached to the upper fixing surface.

[0015] In some embodiments, the outer edge of the damper is adhered to the upper fixing surface.

[0016] In some embodiments, the damper has a plurality of peaks and valleys between the outer edge and the inner edge of the damper, and the peaks are lower than or flush with the outer edge of the damper.

[0017] In some embodiments, the upper fixing surface is a stepped surface that is recessed relative to the outer edge of the damper fixing ring.

[0018] In some embodiments, the cone has an inner edge opposite the outer edge, the inner edge of the damper is integrally hollowed in a truncated cone shape or a truncated pyramid shape, and the inner edge of the damper and the inner edge of the cone are fixed to each other.

[0019] In some embodiments, the inner edge of the damper and the inner edge of the cone are shaped to fit each other, and the inner edge of the damper is attached to the inner edge of the cone.

[0020] In some embodiments, the voice coil also has a center portion, and the inner edge of the cone surrounds the center portion.

[0021] In some embodiments, the center portion is recessed downward relative to the inner edge of the cone.

[0022] In some embodiments, the center portion and the cone are integrated, and the voice coil is connected to the center portion or the inner edge of the cone.

[0023] In some embodiments, the voice coil includes a folding ring, and the outer edge of the cone is fixed to the basket and / or the damper fixing ring through the folding ring.

[0024] In some embodiments, the folding ring includes at least one upwardly arched upper arch portion in the middle and at least one downwardly arched lower arch portion in the middle.

[0025] In some embodiments, the material of the folding ring is rubber.

[0026] In some embodiments, the damper fixing ring includes a hollow cylinder body that is open at both top and bottom ends, and the cylinder body also has a tapered shrinkage section that gradually shrinks inward from bottom to top.

[0027] In some embodiments, the magnetic circuit unit is arranged in the basket.

[0028] In some embodiments, the magnetic circuit unit comprises a U-shaped iron having a ring-shaped side wall, a magnetic steel arranged in the ring-shaped side wall of the U-shaped iron, and a front sheet laminated on the magnetic steel, the U-shaped iron is embedded in a ring-shaped portion of the yoke, the lower end of the voice coil is movably inserted into a magnetic gap of the magnetic circuit unit, the magnetic steel and the front sheet are located inside the magnetic gap, and the ring-shaped side wall of the U-shaped iron is located outside the magnetic gap.

[0029] A second aspect of the present disclosure provides an automobile audio system comprising the loudspeaker.

[0030] The loudspeaker of the present disclosure, by arranging the damper fixing ring on the yoke and arranging the damper in the middle part of the cone and the damper fixing ring, makes full use of the space above the cone, and can ensure that the cone does not shake away from the vibration axis even when the loudspeaker is operated at a large power, that is, allows the loudspeaker to operate at a large power, improves the power, and does not excessively increase the overall height or thickness of the loudspeaker. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the present disclosure, 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 disclosure, and other drawings can also be obtained according to these drawings without creative labor for those skilled in the art.

[0032] Fig. 1 is a perspective view of a loudspeaker according to an embodiment of the present disclosure;

[0033] Fig. 2 is a top view of a loudspeaker according to an embodiment of the present disclosure;

[0034] Fig. 3 is a sectional view along A-A in Fig. 2;

[0035] Fig. 4 is an exploded view of a loudspeaker according to an embodiment of the present disclosure;

[0036] Fig. 5 is a perspective view of a comparative example;

[0037] Fig. 6 is a frequency response curve diagram of the embodiment and the comparative example.

[0038] wherein,

[0039] 1 - yoke;

[0040] 2 - cone; 21 - cone; 22 - center part; 23 - folded ring; 231 - upper arch part; 232 - lower arch part;

[0041] 3 - voice coil;

[0042] 4 - magnetic circuit unit; 41 - U iron; 42 - magnetic steel; 43 - front plate; 44 - magnetic gap;

[0043] 5 - dome; 51 - outer edge; 52 - crest; 53 - trough; 54 - inner edge;

[0044] 6 - dome fixing ring; 60 - upper fixing surface; 61 - contraction section;

[0045] 7 - top cover. DETAILED DESCRIPTION

[0046] The preferred embodiments of the present disclosure will be described in detail with reference to the drawings, so that the advantages and features of the present disclosure can be more easily understood by those skilled in the art. It should be noted that the description of these embodiments is intended to help understand the present disclosure, but is not intended to limit the present disclosure. In addition, the technical features involved in the various embodiments of the present disclosure described below can be combined with each other as long as they do not conflict with each other.

[0047] In the present disclosure, "inner" and "outer" are defined with reference to the center line of the voice coil of the loudspeaker, with the position closer to the center line of the voice coil being inner, and vice versa. The orientation words "upper", "lower", and "horizontal" are intended to facilitate the understanding of the structure of the loudspeaker by those skilled in the art, and are not used to limit the state of the loudspeaker after it is installed in a use scenario, for example, it can be installed on the upper surface, lower surface, upright surface, or inclined surface of a vehicle interior part (such as a sheet metal part).

[0048] The drawings of FIGS. 1-9 are drawn to true scale, and in order to maintain the brevity of the specification, the proportions of the various elements are not listed one by one, but the proportions and positions of the various elements should be considered as part of the content of the specification. EMBODIMENT

[0049] The present embodiment provides a loudspeaker, in particular a vehicle-mounted loudspeaker, which serves as a midrange or high-pitched sound unit of a vehicle-mounted sound system, can be installed on a vehicle, and is used for sound playback in the frequency range of 350-20KHz.

[0050] Referring to FIGS. 1-4, the loudspeaker includes a spider 1, a cone 2, a voice coil 3, and a magnetic circuit unit 4. The spider 1 is made of plastic that meets certain strength requirements, and is used to support and protect other components. The cone 2 is in the shape of a sheet as a whole, and is fixed to the spider 1. The voice coil 3 includes a metal skeleton and a coil wound thereon, and after the coil is energized, it can reciprocate along the center line (i.e., the vibration axis of the loudspeaker) under the magnetic field of the magnetic circuit unit 4. One end of the voice coil 3 is fixed to the cone 2, thereby driving the cone 2 to vibrate and produce sound. The magnetic circuit unit 4 has a magnetic gap, and the coil portion of the voice coil 3 is movably inserted into the magnetic gap, thereby interacting with the magnetic field.

[0051] The cone 2 has a cone body 21 which is upwardly convex in the middle, and the magnetic circuit unit 4 is arranged below the cone 2. Specifically, the cone 2 comprises, from inside to outside, a center portion 22, the cone body 21 and a folded ring 23. The cone body 21 is in the shape of a hollow truncated cone or truncated pyramid as a whole, and the inner edge is higher than the outer edge. The inner edge encloses a central through hole and surrounds the center portion 22, and the center portion 22 is connected to the inner edge and covers the central through hole. The outer edge of the cone body 21 is fixed to the basket 1 through the folded ring 23. The cone body 21 and the center portion 22 are integrated and are formed by cutting and processing paper or fabric, or are formed by molding plastic (such as PP (polypropylene)). The material of the folded ring 23 can be rubber and is bonded to the cone body 21 by glue. Specifically, in the embodiment, the profile of the center portion 22 is circular, and the outer profile of the cone body 21 and the folded ring 23 is annular in the top view. The center portion 22 is concave downward relative to the inner edge of the cone body 21, and the outer profile is a part of a spherical surface or comprises a part of a spherical surface. The folded ring 23 has at least one upwardly convex upper convex portion 231 which is convex in the middle and at least one downwardly convex lower convex portion 232 which is convex in the middle. Specifically, in the embodiment, the upper convex portion 231 and the lower convex portion 232 of the folded ring 23 are arranged in sequence and staggered.

[0052] The cone 2 encloses an internal space as a whole, at least a part of the voice coil 3 is located in the internal space, and even the upper part of the magnetic circuit unit 4 can be located in the internal space; thereby significantly improving the space utilization and being conducive to reducing the height or thickness of the loudspeaker as a whole.

[0053] The magnetic circuit unit 4 comprises a U-shaped iron 41, a magnetic steel 42 and a front sheet 43. The U-shaped iron 41 has a ring-shaped side wall which encloses a receiving groove, the magnetic steel 42 is stacked on the bottom of the U-shaped iron 41, and the front sheet 43 is stacked on the magnetic steel 42, so as to form the above-mentioned magnetic gap between the inner side surface of the receiving groove and the outer circumferential surface of the magnetic steel 42 and the front sheet 43. Specifically, the front sheet 43, the magnetic steel 42 and the U-shaped iron 41 are bonded and fixed in sequence by glue. The U-shaped iron 41 is fixed to the basket 1, specifically by being bonded to the bottom of the basket 1 by glue. The lower end of the voice coil 3 is movably inserted into the magnetic gap of the magnetic circuit unit 4, the magnetic steel 42 and the front sheet 43 are located inside the magnetic gap, and the ring-shaped side wall of the U-shaped iron 41 is located outside the magnetic gap.

[0054] The basket 1 can also be provided with a flow-through hole for communicating the space inside and outside the basket 1.

[0055] The loudspeaker further comprises a cone 5 and a cone fixing ring 6. The cone 5 comprises a main body having a plurality of concentrically arranged corrugations, and the cone 5 is flexible and can be formed by cutting and processing a fabric such as cloth. The cone fixing ring 6 is made of a material satisfying certain strength requirements. The cone fixing ring 6 is connected to the basket 1, and the outer edge of the cone 21 is fixed to the basket 1 and / or the cone fixing ring 6; the outer edge of the cone 5 is fixed to the cone fixing ring 6, and the inner edge of the cone 5 is fixed to the cone 21. In the embodiment, the outer edge of the cone 21 is fixed (for example, by adhesive bonding) between the basket 1 and the cone fixing ring 6.

[0056] The cone fixing ring 6 has an annular upper fixing surface 60, and the outer edge of the cone 5 is fitted and fixed to the upper fixing surface 60. The upper fixing surface 60 is a stepped surface that is sunken relative to the outer edge of the cone fixing ring 6 and is horizontal. Thus, the cone 5 and the flexible components such as the cone 2 are all located within the cone fixing ring 6 and the basket 1 and do not protrude above the cone fixing ring 6, thereby providing better protection for the cone 5 and the cone 2. The cone 5 has a plurality of peaks and valleys between the outer edge and the inner edge of the cone 5, and the peaks are lower than or level with the outer edge of the cone 5. Further, the inner edge of the cone 21 is also not higher than the outer edge of the cone 5.

[0057] The inner edge of the cone 5 and the inner edge of the cone 21 are fixed to each other, for example, by adhesive bonding. The inner edge of the cone 5 and the inner edge of the cone 21 are shaped to cooperate with each other, and the inner edge of the cone 5 is fitted on the inner edge of the cone 21. Further, the inner edge of the cone 5 is also hollow and has a truncated conical or truncated pyramidal shape to better fit the cone 21.

[0058] The cone fixing ring 6 is a hollow cylinder with both upper and lower ends open. The upper fixing surface 60 is formed on the upper end of the cone fixing ring 6, and the lower end of the cone fixing ring 6 is fixed to the basket 1. The cylinder further has a converging section 61 that is tapered inward from the lower end to the upper end. The tapering angle of the converging section 61 is not more than 30 degrees. The tapering angle specifically refers to the included angle between the converging section 61 and the center line of the voice coil 3 (the vibration axis of the loudspeaker).

[0059] In the embodiment, a ring-shaped cone fixing ring 6 is arranged above the basket 1, and a cone 5 is added to the upper end of the cone 2. The cone 5 in this structure plays two roles: 1. It plays a good positioning role and stabilizes the vibration system; 2. It forms a cavity structure with the inverted cone 2 and the cone fixing ring 6 to enhance the bass effect. Under the premise of the same impedance, the power of the loudspeaker can be greatly improved by about 3 times.

[0060] Comparative Example

[0061] Figure 5 shows a loudspeaker of a comparative example. Referring to Figure 5, the loudspeaker of the comparative example differs from the embodiment in that no damper is provided, and the upper cover of the cone 2 is provided with a hollow top cover 7, and is otherwise substantially the same. As shown in Figure 5, the top cover 7 is fixed to the basket 1 and covers the upper surface of the cone 2.

[0062] Comparison of frequency response curves of loudspeakers

[0063] The loudspeakers of the embodiment and the comparative example were subjected to frequency response tests, wherein the comparative example and the embodiment were debugged under the same radiation surface size. The frequency response curves are shown in Figure 6, and are distinguished by the color and thickness of the curves, wherein the thinner lines represent the frequency response curves of the comparative example, and the thicker lines represent the frequency response curves of the embodiment. The power of the sample of the comparative example test was 5W, and the power of the sample of the embodiment was 15W. As can be seen from Figure 6, the average sensitivity of the frequency response curve of the embodiment is about 3dB higher than that of the comparative example.

[0064] The features of the embodiments of the present disclosure are set forth in the following clauses:

[0065] Clause 1, a loudspeaker, comprising a basket, a cone, a damper, a voice coil for driving the cone to vibrate, and a magnetic circuit unit for driving the voice coil to move, the cone having a cone body with a middle part protruding upward, the magnetic circuit unit being arranged below the cone, wherein the loudspeaker further comprises a damper fixing ring connected to the basket, an outer edge of the cone body being fixed to the basket and / or the damper fixing ring; an outer edge of the damper being fixed to the damper fixing ring, and an inner edge of the damper being fixed to the cone body.

[0066] Clause 2, the loudspeaker according to Clause 1, wherein the damper fixing ring has an annular upper fixing surface, and the outer edge of the damper is fitted and fixed to the upper fixing surface.

[0067] Clause 3, the loudspeaker according to Clause 2, wherein the damper has a plurality of peaks and valleys between the outer edge and the inner edge of the damper, the peaks being lower than or level with the outer edge of the damper; and / or the upper fixing surface is a stepped surface that is recessed relative to the outer edge of the damper fixing ring.

[0068] Clause 4, the loudspeaker according to Clause 1, wherein the cone body has an inner edge opposite the outer edge, the inner edge of the damper is a hollow truncated cone or truncated pyramid, and the inner edge of the damper and the inner edge of the cone body are fitted and fixed to each other.

[0069] Clause 5, the loudspeaker according to Clause 1 or 4, wherein the cone further has a center part between the inner edges of the cone body.

[0070] Clause 6, the loudspeaker of clause 5, wherein the center portion is concave downward relative to an inner edge of the cone.

[0071] Clause 7, the loudspeaker of clause 5, wherein the center portion and the cone are integral; the voice coil is connected to the center portion or an inner edge of the cone.

[0072] Clause 8, the loudspeaker of clause 1, wherein the cone also has a folded ring, an outer edge of the cone is fixed to the spider and / or the dust cap by the folded ring, the folded ring has at least one upper arch portion which is arched upward in the middle and at least one lower arch portion which is arched downward in the middle.

[0073] Clause 9, the loudspeaker of clause 1, wherein the dust cap is a hollow cylinder which is open at both top and bottom ends, the cylinder also has a tapered section which is tapered inwardly and inclined from bottom to top.

[0074] Clause 10, an automobile audio system, comprising the loudspeaker of any one of clauses 1 to 9.

[0075] As shown in the specification and claims, the term "comprising" and "including" only indicates the inclusion of the steps and elements clearly identified, and these steps and elements do not constitute an exclusive list, and the method or device can also include other steps or elements.

[0076] As understood by those skilled in the art, unless specifically stated, the singular forms "a", "an" and "the" as used herein also include the plural forms. It is further understood that "a plurality of" means two or more, and other quantifiers are similar.

[0077] It is 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 indicate a specific order or importance. In fact, the expressions "first", "second", etc. can be used interchangeably. 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 disclosure.

[0078] In the present disclosure, unless specifically defined and limited otherwise, the "on" or "under" of a first feature to a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "on", "above" and "over" of a first feature to a second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "under", "below" and "underneath" of a first feature to a second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0079] The above embodiments are only for illustrating the technical concepts and characteristics of the present disclosure, and are preferred embodiments, and the purpose is to enable those skilled in the art to understand the content of the present disclosure and implement it, and cannot limit the protection scope of the present disclosure.

Claims

1. A loudspeaker comprising: a spider; a cone having a middle portion upwardly convex; a voice coil for driving the cone to vibrate; a magnetic circuit unit for driving the voice coil to move, the magnetic circuit unit being disposed below the cone; a dome; and a dome fixing ring connected to the spider; wherein an outer edge of the cone is connected to the spider and / or the dome fixing ring, an outer edge of the dome is connected to the dome fixing ring, and an inner edge of the dome is connected to the cone. The dome fixing ring has an annular upper fixing surface, and the outer edge of the dome is connected to the upper fixing surface.

2. The loudspeaker of claim 1, wherein, The outer edge of the dome is bonded to the upper fixing surface.

3. The loudspeaker of claim 2, wherein, The dome has a plurality of peaks and a plurality of valleys between the outer edge and the inner edge of the dome, and the peaks are lower than or flush with the outer edge of the dome.

4. The loudspeaker of claim 2, wherein, The upper fixing surface is a stepped surface that is recessed relative to an outer edge of the dome fixing ring.

5. The loudspeaker of claim 2, wherein, The cone has an inner edge, the inner edge of the dome is integrally hollow truncated conical or truncated pyramidal, and the inner edge of the dome and the inner edge of the cone are fixed to each other.

6. A loudspeaker according to any preceding claim, wherein, The inner edge of the dome and the inner edge of the cone are shaped to fit each other, and the inner edge of the dome is attached to the inner edge of the cone.

7. The loudspeaker of claim 6, wherein, The cone further has a center portion, and the inner edge of the cone surrounds the center portion.

8. A loudspeaker according to any preceding claim, characterised in that, The center portion is recessed downward relative to the inner edge of the cone.

9. The loudspeaker of claim 8, wherein, The center portion and the cone are integral, and the voice coil is connected to the center portion or the inner edge of the cone.

10. The loudspeaker of claim 8, wherein, The cone includes a folding ring, the outer edge of the cone is fixed to the spider and / or the dome fixing ring through the folding ring, and the folding ring includes at least one middle portion upwardly arched upper arching portion and at least one middle portion downwardly arched lower arching portion.

11. A loudspeaker according to any preceding claim, wherein, The folding ring is made of rubber.

12. The loudspeaker of claim 11, wherein, The dome fixing ring includes a hollow cylinder body that is open at both upper and lower ends, and the cylinder body further has a converging section that is tapered inwardly from the lower end to the upper end.

13. A loudspeaker according to any preceding claim, characterised in that, The magnetic circuit unit is disposed in the spider, the magnetic circuit unit includes a U-shaped iron having an annular sidewall, a magnetic steel disposed in the annular sidewall of the U-shaped iron, and a front sheet laminated on the magnetic steel, the U-shaped iron is embedded in an annular portion of the spider, a lower end portion of the voice coil is movably inserted into a magnetic gap of the magnetic circuit unit, the magnetic steel and the front sheet are located inside the magnetic gap, and the annular sidewall of the U-shaped iron is located outside the magnetic gap.

14. A loudspeaker according to any preceding claim, characterised in that, The loudspeaker includes any one of claims 1 to 14.

15. An automotive audio system, characterized by comprising: ​

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