Damper and preparation method therefor, and automobile loudspeaker

Abstract

A damper and a preparation method therefor, and an automobile loudspeaker. The damper of a loudspeaker comprises: an inner ring portion having an annular first inner edge and an annular first outer edge; and an outer ring portion having an annular second inner edge and an annular second outer edge, wherein the inner ring portion is made of cloth, and the outer ring portion is made of rubber; or, the inner ring portion is made of rubber, and the outer ring portion is made of cloth; the inner ring portion and the outer ring portion are respectively corrugated and are respectively provided with crests and troughs; and the first outer edge is fixedly connected to the second inner edge. The damper is conductive to enabling the loudspeaker to obtain a better frequency response curve and smaller distortion, especially a better frequency response curve and smaller distortion in a low-frequency band.

Description

Positioning support sheet and preparation method thereof, and car speaker Related applications

[0001] This application claims priority to Chinese patent applications No. CN2023111366557 and CN2023224021822 filed on September 5, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present disclosure belongs to the field of automobile speakers and relates to a positioning support plate and a preparation method thereof, and an automobile speaker. Background Art

[0003] Today's audio-visual systems are developing rapidly, especially in the field of audio, with increasingly higher requirements for speaker sound quality. Among them, mid-bass speakers are components of sound reproduction systems, especially in-vehicle audio systems. Existing speakers typically include a basin frame, a diaphragm mounted on the basin frame, a voice coil connected to the diaphragm, and a positioning support. The positioning supports used in existing speakers are generally made of cotton cloth. For example, Chinese patent CN108053818B discloses a speaker positioning support and its preparation method, which uses cotton or polyester filament as raw materials. Speakers with traditional cotton cloth positioning supports have poor damping properties. Some other patents disclose that rubber positioning supports can be used for positioning supports. For example, Chinese patent CN108650602A discloses a thin, high-power sound exciter whose positioning supports are made of rubber. However, mid-bass speakers with rubber positioning supports exhibit high distortion. Summary of the Invention

[0004] This disclosure relates to a positioning support and its preparation method. This positioning support helps a speaker achieve a good frequency response curve with low distortion, particularly a good frequency response curve with low distortion in the low-frequency range. This disclosure also relates to a car speaker using this positioning support, specifically a woofer or subwoofer in a car audio system.

[0005] A first aspect of the present disclosure provides a positioning support for a loudspeaker, comprising:

[0006] an inner ring portion having an annular first inner edge and a first outer edge;

[0007] The outer ring portion has an annular second inner edge and a second outer edge;

[0008] Wherein, the material of the inner ring portion is cloth, and the material of the outer ring portion is rubber; or, the material of the inner ring portion is rubber, and the material of the outer ring portion is cloth;

[0009] The inner ring portion and the outer ring portion are respectively corrugated and have wave crests and wave troughs; the first outer edge and the second inner edge are fixedly connected.

[0010] In some embodiments, the first outer edge and the second inner edge overlap each other.

[0011] In some embodiments, the first outer edge and the second inner edge are bonded by glue.

[0012] In some embodiments, the first outer edge and the second inner edge are glued and then fixed by hot pressing.

[0013] In some embodiments, the first outer edge and the second inner edge are located between a crest of the inner ring portion and a trough of the outer ring portion, or between a trough of the inner ring portion and a crest of the outer ring portion. In other words, the first outer edge is not a crest or a trough of the inner ring portion, and the second outer edge is not a crest or a trough of the outer ring portion.

[0014] In some embodiments, the ratio of the areas of the inner ring portion to the outer ring portion is 1:(1.5-3). In other embodiments, the ratio of the areas of the inner ring portion to the outer ring portion is 1:(2-3). In a specific embodiment, the ratio of the areas of the inner ring portion to the outer ring portion is 1:2.

[0015] In some embodiments, the inner ring portion is corrugated from the first inner edge to the first outer edge, and the outer ring portion is corrugated from the second inner edge to the second outer edge.

[0016] In some embodiments, the positioning support piece further includes a connecting edge, the connecting piece extends outward from the second outer edge along a plane, and the connecting piece and the outer ring portion are integral.

[0017] In some embodiments, the number of wave peaks on the inner ring portion is less than the number of wave peaks on the outer ring portion, and the spacing between the wave peaks and the wave troughs on the inner and outer ring portions is equal. In other embodiments, the ratio of the number of wave peaks on the inner ring portion to the number of wave peaks on the outer ring portion is 1:(1.1-2.5). In a specific embodiment, the ratio of the number of wave peaks on the inner ring portion to the number of wave peaks on the outer ring portion is 1:1.5.

[0018] In some embodiments, the fabric is cotton, and the rubber comprises nitrile rubber. The fabric is woven from cotton fibers and cut into a desired shape (including but not limited to a circle with a central hole, a rectangle, a rounded rectangle, or a racetrack shape). The nitrile rubber is injection molded into the desired shape, including but not limited to a circle with a central hole, a rectangle, a rounded rectangle, or a racetrack shape. Herein, a "racetrack shape," also referred to as a straight-sided ellipse, consists of a rectangle and two symmetrical semicircles or arcs, with the longest chords of the two semicircles or arcs coinciding with a pair of opposing sides of the rectangle.

[0019] In some embodiments, the shape of the cloth and the shape of the rubber are similar figures when viewed from above.

[0020] In some embodiments, the inner ring portion is a single-layer structure composed of cloth or cloth with a coating, and the outer ring portion is a single-layer structure formed of rubber. The coating includes a waterproof coating or a reinforcement coating.

[0021] In some embodiments, the outer ring portion is a single-layer structure made of cloth or cloth with a coating, and the inner ring portion is a single-layer structure formed of rubber. The coating includes a waterproof coating or a reinforcement coating.

[0022] Another aspect of the present disclosure provides a car speaker comprising the positioning support, wherein the car speaker is a subwoofer or a woofer for installation in a car.

[0023] In this article, "subwoofer" refers to a speaker that emits sound concentrated in the 20~40Hz frequency band; "woofer" refers to a speaker that emits sound concentrated in the 40~80HZ frequency band.

[0024] Another aspect of the present disclosure provides a method for preparing the positioning support sheet, which comprises the following steps:

[0025] Cut the cloth into a ring shape as the base material for the inner ring;

[0026] Providing an annular rubber material as a base material of the outer ring portion;

[0027] Apply glue to the outer edge of the cloth and / or the inner edge of the rubber material, and heat press at 80-160°C after lamination;

[0028] Processing corrugations on the connected cloth and rubber material to obtain the positioning support piece;

[0029] The present disclosure also adopts the following technical solutions:

[0030] A method for preparing the positioning support sheet, the method comprising the following steps:

[0031] Providing an annular rubber material as a base material of the inner ring portion;

[0032] Cut the cloth into a ring shape as the base material of the outer ring;

[0033] Apply glue to the outer edge of the rubber material and / or the inner edge of the cloth, and heat press at 80-160°C after lamination;

[0034] Corrugations are processed on the connected cloth and rubber material to obtain the positioning support piece.

[0035] The positioning support disclosed herein is a composite positioning support primarily composed of an inner ring portion and an outer ring portion, both of which are corrugated and spliced ​​together. One of the inner and outer ring portions is made of cloth, while the other is made of rubber. The outer edge of the inner ring portion is fixedly connected to the inner edge of the outer ring portion. When used in a loudspeaker, the loudspeaker exhibits a good low-frequency or ultra-low-frequency response curve, while meeting the damping requirements of bass or ultra-bass automotive speakers. Distortion in mid- and low-frequency frequencies is also reduced, resulting in a better overall listening experience and improved sound quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solution of the present disclosure, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0037] FIG1 is a perspective view of a positioning support according to an embodiment of the present disclosure;

[0038] FIG2 is a top view of a positioning support according to an embodiment of the present disclosure;

[0039] FIG3 is a cross-sectional view taken along line AA in FIG2 ;

[0040] FIG4 is a partial enlarged view of point B in FIG3 ;

[0041] FIG5 is a top view of another positioning support according to an embodiment of the present disclosure;

[0042] FIG6 is a cross-sectional view taken along line AA in FIG5 ;

[0043] FIG7 is a partial enlarged view of point C in FIG6;

[0044] FIG8 is a top view of a car speaker according to an embodiment of the present disclosure;

[0045] FIG9 is a perspective view of a car speaker according to an embodiment of the present disclosure;

[0046] FIG10 is a partial enlarged view of the positioning support piece in FIG9;

[0047] FIG11 is a top view of another car speaker according to an embodiment of the present disclosure;

[0048] FIG12 is a perspective view of another car speaker according to an embodiment of the present disclosure;

[0049] FIG13 is a partial enlarged view of point E in FIG12;

[0050] FIG14 is a frequency response graph of two car speakers according to an embodiment of the present disclosure and two car speakers according to Comparative Examples 1 and 2;

[0051] FIG15 is an enlarged view of the low-frequency portion of FIG14 ;

[0052] FIG16 is a distortion curve diagram of two car speakers according to an embodiment of the present disclosure and two car speakers according to comparative examples 1 and 2.

[0053] in,

[0054] 110 - Positioning support;

[0055] 11 - Inner ring; 111 - First inner edge; 112 - First outer edge; 12 - Outer ring; 121 - Second inner edge; 122 - Second outer edge; 13 - Connecting plate; 14 - Basin frame; 15 - Diaphragm; 16 - Voice coil; 17 - Front plate; 18 - T-shaped iron; 19 - Magnet;

[0056] 21 - Inner ring; 211 - First inner edge; 212 - First outer edge; 22 - Outer ring; 221 - Second inner edge; 222 - Second outer edge; 23 - Connecting plate; 24 - Basin frame; 25 - Diaphragm; 26 - Voice coil; 27 - Front plate; 28 - T-shaped iron; 29 - Magnet. DETAILED DESCRIPTION

[0057] The preferred embodiments of the present disclosure are described in detail below in conjunction with the accompanying drawings to make the advantages and features of the present disclosure more easily understood by those skilled in the art. It should be noted that the descriptions of these embodiments are intended to facilitate understanding of the present disclosure and do not constitute a limitation of the present disclosure. In addition, the technical features involved in the various embodiments of the present disclosure described below may be combined with each other as long as they do not conflict with each other.

[0058] In this disclosure, the terms "inside" and "outside" are defined relative to the centerline of the voice coil, with the direction closer to the voice coil centerline considered inside and the direction farther away from the centerline considered outside. The directional terms "upper," "lower," and "horizontal" are intended to facilitate understanding of automotive speaker structure and are not intended to define the state of a speaker system after installation in a specific scenario.

[0059] Figure 1 shows a positioning support 110 according to this embodiment. As shown in Figures 2 to 4, positioning support 110 comprises an inner ring portion 11 and an outer ring portion 12. The inner ring portion 11 is made of cloth, while the outer ring portion 12 is made of rubber. Specifically, the inner ring portion 11 is made of cotton cloth, while the outer ring portion 12 is made of nitrile rubber. Both the inner ring portion 11 and the outer ring portion 12 are corrugated, each having peaks and troughs. The number of peaks in the inner ring portion 11 is smaller than that in the outer ring portion 12, and the spacing between the peaks and troughs in the inner and outer ring portions 11 and 12 is equal. The inner ring portion 11 includes a first inner edge 111 and a first outer edge 112. The inner ring portion 11 is corrugated from the first inner edge 111 to the first outer edge 112. The outer ring portion 12 includes a second inner edge 121 and a second outer edge 122. The outer ring portion 12 is corrugated from the second inner edge 121 to the second outer edge 122. The first outer edge 112 and the second inner edge 121 are located between a crest of the inner ring portion 11 and a trough of the outer ring portion 12, or between a trough of the inner ring portion 11 and a crest of the outer ring portion 12. The first outer edge 112 and the second inner edge 121 are bonded together by adhesive and then hot-pressed to achieve mutual lamination and fixed connection. The first outer edge 112 is not a crest or trough of the inner ring portion 11, and the second outer edge 122 is not a crest or trough of the outer ring portion 12.

[0060] As shown in FIG. 3 , the positioning support piece 110 further includes a connecting edge 13 . The connecting edge 13 extends outward from the second outer edge 122 along a plane. The connecting piece 13 and the outer ring portion 12 are integral.

[0061] Furthermore, the area ratio of the inner ring portion 11 to the outer ring portion 12 is 1:(1.5-3). Specifically, for the positioning bracket shown in Figure 2, the area ratio of the inner ring portion 11 to the outer ring portion 12 is 1:2. The inner ring portion 11 has two peaks, while the outer ring portion 12 has three peaks. From a top-down perspective, the inner ring portion 11 and the outer ring portion 12 have similar shapes, sharing a common center.

[0062] It's also important to note that the cotton fabric used for the inner ring 11 is a woven fabric made of fibers (such as cotton and / or linen). The inner ring 11 is a single-layer structure, processed into a sine or cosine wave pattern. The outer ring 12 is a single-layer structure made of rubber, injection-molded into a single layer, and further processed into a sine or cosine wave pattern. The thickness deviation between the inner and outer rings 11 and 12 is less than ±0.1 mm, and the corrugation shape (including height and width) is consistent.

[0063] The method for preparing the positioning support 110 includes the following steps:

[0064] Cut the cloth into a ring shape as the base material of the inner ring portion 11;

[0065] Providing an annular rubber material as the base material of the outer ring portion 12;

[0066] Apply glue to the outer edge of the cloth and / or the inner edge of the rubber material, and heat press at 80-160°C after lamination;

[0067] Corrugations are processed on the connected cloth and rubber material to obtain the positioning support piece 110 .

[0068] Figures 6 to 8 illustrate another positioning support 110 according to this embodiment. As shown in Figures 6 to 8, this positioning support 110 comprises an inner ring portion 21 and an outer ring portion 22. The inner ring portion 21 is made of rubber, while the outer ring portion 22 is made of cloth. Specifically, the inner ring portion 21 is made of nitrile rubber, while the outer ring portion 22 is made of cotton cloth. Both the inner ring portion 21 and the outer ring portion 22 are corrugated, each having peaks and troughs. The number of peaks in the inner ring portion 21 is smaller than that in the outer ring portion 22, and the spacing between the peaks and troughs in the inner ring portion 21 and the outer ring portion 22 is equal. The inner ring portion 21 includes a first inner edge 211 and a first outer edge 212. The inner ring portion 21 is corrugated from the first inner edge 211 to the first outer edge 212. The outer ring portion 22 includes a second inner edge 221 and a second outer edge 222. The outer ring portion 22 is corrugated from the second inner edge 221 to the second outer edge 222. The first outer edge 212 and the second inner edge 221 are located between a crest of the inner ring portion 21 and a trough of the outer ring portion 22, or between a trough of the inner ring portion 21 and a crest of the outer ring portion 22. The first outer edge 212 and the second inner edge 221 are bonded together by adhesive and then hot-pressed to achieve mutual lamination and fixed connection. The first outer edge 212 is not a crest or trough of the inner ring portion 21, and the second outer edge 222 is not a crest or trough of the outer ring portion 22.

[0069] As shown in FIG. 6 , the positioning support piece 110 further includes a connecting edge 23 . The connecting edge 23 extends outward along a plane from the second outer edge 222 . The connecting piece 23 and the outer ring portion 22 are integral.

[0070] Furthermore, the area ratio of the inner ring portion 21 to the outer ring portion 22 is 1:(1.5-3). Specifically, for the positioning bracket shown in Figure 5 , the area ratio of the inner ring portion 11 to the outer ring portion 12 is 1:2. The inner ring portion 11 has two peaks, while the outer ring portion 12 has three peaks. From a top-down perspective, the inner ring portion 11 and the outer ring portion 12 have similar shapes, sharing a common center.

[0071] It's also important to note that the cotton fabric used for the outer ring 12 is a woven fabric made of fibers (such as cotton and / or linen). The outer ring 12 is a single-layer structure, processed into a sine or cosine wave pattern. The inner ring 11 is a single-layer structure made of rubber, injection-molded, and further processed into a sine or cosine wave pattern. The thickness deviation between the inner and outer rings 11 and 12 is less than ±0.1 mm, and the corrugation shape (including height and width) is consistent.

[0072] The preparation method of the second embodiment of the positioning support 110 includes the following steps:

[0073] Providing an annular rubber material as the base material of the inner ring portion 21;

[0074] The cloth is cut into a ring shape as the base material of the outer ring portion 22;

[0075] Apply glue to the outer edge of the rubber material and / or the inner edge of the cloth, and heat press at 80-160°C after lamination;

[0076] Corrugations are processed on the connected cloth and rubber material to obtain the positioning support piece 110 .

[0077] Figures 8 to 10 illustrate a speaker according to this embodiment, which is a subwoofer or woofer for installation in a vehicle. Referring to Figures 8 to 10 , the speaker includes the positioning support 110 shown in Figures 1 to 4 . The vehicle speaker also includes a frame 14, a front plate 17, a magnet 19, and a T-shaped iron 18. A diaphragm 15 is mounted on the frame 14, to which a voice coil 16 is connected. The front plate 17 and the magnet 19 surround the T-shaped iron 18, forming a magnetic gap with the outer wall of the T-shaped iron 18 for the voice coil 16 to be inserted. The lower portion of the voice coil 16 is inserted into the gap, and the diaphragm 15 covers the front of the T-shaped iron 18. The outer edge of the front plate 17 is embedded in the lower end of the frame 14. Specifically, the lower end of the frame 14 has an annular mounting groove formed therein, into which the outer edge of the front plate 17 is inserted.

[0078] Figures 9 and 10 illustrate a car speaker according to this embodiment equipped with the positioning support 110 shown in Figures 1 to 4. This support 110 comprises an inner ring portion 11 and an outer ring portion 12. Inner ring portion 11 is made of cloth, while outer ring portion 12 is made of rubber. Specifically, inner ring portion 11 is made of cotton cloth, while outer ring portion 12 is made of nitrile rubber. A subwoofer or woofer equipped with this positioning support 110 exhibits excellent damping performance, low distortion, and a pleasant overall listening experience.

[0079] Figures 11 to 13 illustrate another speaker according to this embodiment, which is a subwoofer or woofer for installation in a vehicle. Referring to Figures 11 to 13, the speaker includes the positioning support 110 shown in Figures 5 to 7. The vehicle speaker also includes a frame 24, a front plate 27, a magnet 29, and a T-shaped iron 28. A diaphragm 25 is mounted on the frame 24, to which a voice coil 26 is connected. The front plate 27 and the magnet 29 surround the T-shaped iron 28, forming a magnetic gap with the outer wall of the T-shaped iron 28 for the voice coil 26 to be inserted. The lower portion of the voice coil 26 is inserted into the magnetic gap, and the diaphragm 25 covers the front of the T-shaped iron 28. The outer edge of the front plate 27 is embedded in the lower end of the frame 24. Specifically, the lower end of the frame 24 has an annular mounting groove formed therein, into which the outer edge of the front plate 27 is inserted.

[0080] Figures 12 and 13 illustrate a car speaker according to this embodiment equipped with the positioning support 110 shown in Figures 5 to 7. This support 110 comprises an inner ring portion 21 and an outer ring portion 22. The inner ring portion 21 is made of rubber, while the outer ring portion 22 is made of cloth. Specifically, the inner ring portion 21 is made of nitrile rubber, while the outer ring portion 22 is made of cotton cloth. A subwoofer or woofer equipped with this positioning support 110 exhibits excellent damping performance, low distortion, and a pleasant overall listening experience.

[0081] Comparative Example 1

[0082] Comparative Example 1 provides a car speaker that is basically the same as the two car speakers described above in the embodiment, with the only difference being the material of the positioning support. The positioning support used in Comparative Example 1 is a rubber positioning support, which is integrally made of rubber.

[0083] Comparative Example 2

[0084] Comparative Example 2 provides a car speaker that is substantially the same as the two car speakers of the embodiment, differing only in the material of the positioning support. The positioning support used in Comparative Example 2 is a cotton positioning support, which is integrally made of cotton cloth.

[0085] Speaker frequency response curve comparison

[0086] Frequency response tests were conducted on the two car speakers of the embodiment and the car speakers of Comparative Examples 1 and 2, as shown in Figure 14. The curves are distinguished by color and thickness: the lightest and thinnest lines represent the frequency response curves of Comparative Examples 1 and 2, while the darkest and thickest lines represent the frequency response curves of the two car speakers of the embodiment. As can be seen in Figures 14 and 15, the frequency response curves of the two car speakers of the embodiment outperform those of Comparative Examples 1 and 2 in the mid- and low-frequency ranges.

[0087] Comparison of speaker distortion curves

[0088] Distortion tests were conducted on the two car speakers of the embodiment and the car speakers of Comparative Examples 1 and 2, resulting in distortion curves, as shown in Figure 16. The curves are distinguished by color and thickness: the lightest and thinnest lines represent the distortion curves of Comparative Examples 1 and 2, while the darkest and thickest lines represent the distortion curves of the two car speakers of the embodiment. As can be seen in Figure 16, the distortion of the two car speakers of the embodiment is significantly lower than that of Comparative Examples 1 and 2, with particularly low distortion in the mid- and low-frequency regions.

[0089] The positioning support of the above embodiment is a composite positioning support mainly composed of an inner ring portion and an outer ring portion, both of which are corrugated and spliced ​​together. Among them, one of the inner ring portion and the outer ring portion is cloth and the other is rubber. The outer edge of the inner ring portion is fixedly connected to the inner edge of the outer ring portion. When applied to a loudspeaker, the loudspeaker has a good frequency response curve for mid- and low frequencies, while meeting the good damping requirements of subwoofer or bass car speakers, reducing distortion, improving the overall listening experience, and enhancing sound quality.

[0090] Features of embodiments of the present disclosure are set forth in the following clauses:

[0091] 1. A positioning support for a loudspeaker, comprising:

[0092] an inner ring portion having an annular first inner edge and a first outer edge;

[0093] The outer ring portion has an annular second inner edge and a second outer edge;

[0094] Wherein, the material of the inner ring portion is cloth, and the material of the outer ring portion is rubber; or, the material of the inner ring portion is rubber, and the material of the outer ring portion is cloth;

[0095] The inner ring portion and the outer ring portion are respectively corrugated and have wave crests and wave troughs; the first outer edge and the second inner edge are fixedly connected.

[0096] 2. The positioning support according to clause 1, wherein the first outer edge and the second inner edge overlap each other.

[0097] 3. The positioning support according to clause 1 or 2, wherein the first outer edge and the second inner edge are bonded by glue.

[0098] 4. The positioning support according to clause 3, wherein the first outer edge and the second inner edge are glued and then fixed by hot pressing.

[0099] 5. The positioning support according to any preceding clause, wherein the first outer edge and the second inner edge are located between a wave crest of the inner ring portion and a wave trough of the outer ring portion or between a wave trough of the inner ring portion and a wave crest of the outer ring portion.

[0100] 6. A positioning support according to any preceding clause, wherein the ratio of the area of ​​the inner ring portion to the area of ​​the outer ring portion is 1:(1, 5-3).

[0101] 7. The positioning support according to any preceding clause, wherein the inner ring portion is corrugated from the first inner edge to the first outer edge, and the outer ring portion is corrugated from the second inner edge to the second outer edge.

[0102] 8. The positioning support according to clause 7, wherein the positioning support further comprises a connecting edge, the connecting piece extends outward from the second outer edge along a plane, and the connecting piece and the outer ring portion are integral.

[0103] 9. The positioning support according to clause 7, wherein the number of the wave peaks of the inner ring portion is less than the number of the wave peaks of the outer ring portion, and the spacing between the wave peaks and the wave troughs on the inner ring portion and the outer ring portion is equal.

[0104] 10. A positioning support according to any preceding clause, wherein the cloth is cotton and the rubber comprises nitrile rubber.

[0105] 11. A positioning support according to any preceding clause, wherein the inner ring portion is a single-layer structure composed of cloth or coated cloth, and the outer ring portion is a single-layer structure formed of rubber; or, the outer ring portion is a single-layer structure composed of cloth or coated cloth, and the inner ring portion is a single-layer structure formed of rubber.

[0106] 12. A car speaker, comprising the positioning support according to any one of clauses 1 to 11, wherein the car speaker is a subwoofer or a woofer for installation in a car.

[0107] 13. A method for preparing a positioning support according to any one of clauses 1 to 11, wherein the method comprises the following steps:

[0108] Cut the cloth into a ring shape as the base material for the inner ring;

[0109] Providing an annular rubber material as a base material of the outer ring portion;

[0110] Apply glue to the outer edge of the cloth and / or the inner edge of the rubber material, and heat press at 80-160°C after lamination;

[0111] Processing corrugations on the connected cloth and rubber material to obtain the positioning support piece;

[0112] Alternatively, the preparation method comprises the following steps:

[0113] Providing an annular rubber material as a base material of the inner ring portion;

[0114] Cut the cloth into a ring shape as the base material of the outer ring;

[0115] Apply glue to the outer edge of the rubber material and / or the inner edge of the cloth, and heat press at 80-160°C after lamination;

[0116] Corrugations are processed on the connected cloth and rubber material to obtain the positioning support piece.

[0117] 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.

[0118] Those skilled in the art will understand that, unless otherwise stated, the singular forms "a", "the" and "the" used herein may also include plural forms. It is further understood that "a plurality" in this disclosure refers to two or more, and other quantifiers are similar thereto.

[0119] 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.

[0120] In the present disclosure, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0121] The above embodiment is only for illustrating the technical concept and features of the present disclosure and is a preferred embodiment. Its purpose is to enable people familiar with this technology to understand the content of the present disclosure and implement it accordingly, and it cannot be used to limit the scope of protection of the present disclosure.

Claims

1. A positioning support for a loudspeaker, comprising: an inner ring portion having an annular first inner edge and a first outer edge; An outer ring portion having an annular second inner edge and a second outer edge; Wherein, the material of the inner ring portion is cloth, and the material of the outer ring portion is rubber; or, the material of the inner ring portion is rubber, and the material of the outer ring portion is cloth; The inner ring portion and the outer ring portion are respectively corrugated and have wave crests and wave troughs; the first outer edge and the second inner edge are fixedly connected.

2. The positioning support sheet according to claim 1, characterized in that: The first outer edge and the second inner edge overlap each other.

3. The positioning support sheet according to claim 1 or 2, characterized in that: The first outer edge and the second inner edge are bonded by glue.

4. The positioning support sheet according to claim 3, characterized in that: The first outer edge and the second inner edge are glued and then fixed by hot pressing.

5. A positioning blade according to any preceding claim, characterized in that The first outer edge and the second inner edge are located between a wave crest of the inner ring portion and a wave trough of the outer ring portion or between a wave trough of the inner ring portion and a wave crest of the outer ring portion.

6. A positioning blade according to any preceding claim, characterized in that The ratio of the area of ​​the inner ring portion to the area of ​​the outer ring portion is 1:(1.5-3).

7. A positioning blade according to any preceding claim, characterized in that The inner ring portion is corrugated from the first inner edge to the first outer edge, and the outer ring portion is corrugated from the second inner edge to the second outer edge.

8. The positioning support sheet according to claim 7, characterized in that: The positioning support piece also includes a connecting edge. The connecting piece extends outward from the second outer edge along a plane. The connecting piece and the outer ring portion are integrated.

9. The positioning support sheet according to claim 7, characterized in that: The number of the wave crests of the inner ring portion is smaller than the number of the wave crests of the outer ring portion, and the intervals between the wave crests and the wave troughs on the inner ring portion and the outer ring portion are equal.

10. A positioning blade according to any preceding claim, characterized in that The cloth is cotton cloth, and the rubber comprises nitrile rubber.

11. A positioning blade according to any preceding claim, characterized in that The inner ring portion is a single-layer structure composed of cloth or cloth with a coating, and the outer ring portion is a single-layer structure formed of rubber; or, the outer ring portion is a single-layer structure composed of cloth or cloth with a coating, and the inner ring portion is a single-layer structure formed of rubber.

12. A car speaker, characterized in that: The vehicle speaker comprises the positioning support sheet as claimed in any one of claims 1 to 11, wherein the vehicle speaker is a subwoofer or a woofer for installation in a vehicle.

13. A method for preparing a positioning support sheet according to any one of claims 1 to 11, characterized in that: The preparation method comprises the following steps: Cut the cloth into a ring shape as the base material of the inner ring; Providing an annular rubber material as a base material of the outer ring portion; Apply glue to the outer edge of the cloth and / or the inner edge of the rubber material, and heat press at 80-160°C after lamination; Processing corrugations on the connected cloth and rubber material to obtain the positioning support sheet; Or, the preparation method comprises the following steps: Providing an annular rubber material as a base material of the inner ring portion; Cut the cloth into a ring shape as the base material of the outer ring; Apply glue to the outer edge of the rubber material and / or the inner edge of the cloth, and heat press at 80-160°C after lamination; The positioning support piece is obtained by processing corrugations on the connected cloth and rubber material.

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