Thin-type loudspeaker and vehicle audio system

Abstract

A thin-type loudspeaker and a vehicle audio system. The loudspeaker comprises a support, a cone, a voice coil connected to the cone, and a magnetic driving assembly used for driving the voice coil to vibrate up and down. The cone comprises an outer cone and an inner cone; the outer cone has a first outer edge and a first inner edge; the first outer edge is higher than the first inner edge; the first outer edge is connected to the support; the inner cone has a second outer edge; the second outer edge is connected to the first inner edge; and the middle of the inner cone is arched upwards relative to the second outer edge. The thin-type loudspeaker reduces the heights of the cone and the support without reducing sound radiation surface of the cone, thereby reducing the overall height / thickness of the loudspeaker, and making the loudspeaker light and thin; and additionally, the radial size of the magnetic driving assembly does not need to be increased.

Description

Slim speakers and car audio systems Related applications

[0001] This application claims priority to Chinese patent application No. CN 2024208750132, filed on April 25, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to a thin loudspeaker and a vehicle audio system. Background Technology

[0003] Loudspeakers, especially automotive loudspeakers, are evolving towards lighter, more environmentally friendly, and energy-efficient designs. Currently, some thin loudspeakers exist that reduce their height or thickness. One approach involves integrating the cone and positioning brackets into the magnetic circuit to reduce the speaker's height or thickness. This type of loudspeaker includes a bracket, positioning brackets, a voice coil, a paper cone, and a magnetic guide assembly. The bracket is mounted on the magnetic guide assembly, the voice coil on the paper cone, the paper cone on the bracket, and the positioning bracket on the magnetic guide assembly. The magnetic guide assembly has a central clearance hole, within which the positioning bracket is located. The magnetic guide assembly has an extension extending into the clearance hole, and the outer sides of the positioning bracket are connected to this extension. By placing the positioning bracket within the magnetic guide assembly, and with a portion of the magnetic guide assembly fitted into the bracket, the heights of the positioning bracket, bracket, and paper cone partially overlap, achieving a reduction in thickness. However, in this type of loudspeaker, the radial dimension of the magnetic circuit needs to be larger to accommodate the positioning bracket, leading to an increased magnetic circuit size and a significant increase in cost.

[0004] The information disclosed in the background section is only intended to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] The purpose of this disclosure relates to an improved thin speaker and vehicle audio system.

[0006] One aspect of this disclosure provides a thin loudspeaker, including a bracket, a cone, a voice coil connected to the cone, and a magnetic drive assembly for driving the voice coil to vibrate up and down, the cone including an outer cone and an inner cone;

[0007] The outer cone has a first outer edge and a first inner edge, the first outer edge being higher than the first inner edge, and the first outer edge being connected to the bracket;

[0008] The inner cone has a second outer edge, which is connected to the first inner edge, and the middle part of the inner cone arches upward relative to the second outer edge.

[0009] In some embodiments, the inner cone has a second inner edge that is higher than the second outer edge.

[0010] In some embodiments, the upper end of the voice coil is connected to the second inner edge.

[0011] In some embodiments, the second inner edge is lower than or level with the first outer edge.

[0012] In some embodiments, the outer cone is a truncated inverted cone shape that is larger at the top and smaller at the bottom, and the inner cone is a truncated cone shape that is smaller at the top and larger at the bottom.

[0013] In some embodiments, the first inner edge and the second outer edge are bonded together.

[0014] In some embodiments, the first inner edge is connected to an upwardly bent flange, which is stacked on the second outer edge and adhered and bonded to each other.

[0015] In some embodiments, the second outer edge is connected to an upwardly bent flange, which is stacked on the first inner edge and adhered and bonded to each other.

[0016] In some embodiments, the thin speaker further includes a positioning bracket, the outer edge of which is connected to the first inner edge and / or the second outer edge.

[0017] In some embodiments, the outer edge of the positioning support piece and the first inner edge and / or the second outer edge are overlapped and bonded to each other.

[0018] In some embodiments, the inner edge of the positioning support is connected to the magnetic drive assembly.

[0019] In some embodiments, the bracket has a protrusion that rises upward from its bottom, the protrusion being located outside the magnetic drive assembly or surrounding the magnetic drive assembly, and the positioning support is also connected to the protrusion.

[0020] A second aspect of this disclosure also provides a vehicle audio system, including the aforementioned thin speaker.

[0021] The thin loudspeaker disclosed herein comprises two cones, an inner cone and an outer cone, which are combined together. The inner cone is inverted on the outer cone. Without reducing the sound radiation surface of the cone, the height of the cone and the support is reduced, thereby reducing the overall height / thickness of the loudspeaker and making the loudspeaker thinner and lighter. At the same time, it is not necessary to increase the radial dimension of the magnetic drive assembly. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 is a top view of a thin loudspeaker according to an embodiment of the present disclosure;

[0024] Figure 2 is a cross-sectional view along direction AA in Figure 1;

[0025] Figure 3 is a magnified view of part B in Figure 2;

[0026] Figure 4 is an exploded view of a thin loudspeaker according to a disclosed embodiment;

[0027] Figure 5 is a structural diagram of a bracket according to an embodiment of the present disclosure;

[0028] in,

[0029] 1 - Support; 11 - Bottom; 110 - Through hole; 12 - Protrusion; 2 - Cone; 21 - Outer cone; 211 - First outer edge; 212 - First inner edge; 22 - Inner cone; 221 - Second outer edge; 222 - Second inner edge; 23 - Surround; 24 - Flanged edge; 3 - Voice coil; 31 - Air vent; 4 - Magnetic drive assembly; 40 - Magnetic gap; 41 - U-shaped iron; 5 - Positioning support; 6 - Dust cap. Detailed Implementation

[0030] The preferred embodiments of this disclosure will now be described in detail with reference to the accompanying drawings, so that the advantages and features of this disclosure can be more easily understood by those skilled in the art. It should be noted that the description of these embodiments is for the purpose of aiding understanding of this disclosure, but does not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this disclosure described below can be combined with each other as long as they do not conflict with each other.

[0031] In this disclosure, "inner" and "outer" are defined with reference to the center line of the speaker's voice coil. The direction closer to the center line of the voice coil is considered inner, and vice versa. The directional terms "upper," "lower," and "horizontal" are intended to help those skilled in the art understand the speaker's structure and are not used to limit the speaker's state after installation in a usage scenario, such as whether it can be installed on the upper, lower, upright, or inclined surface of an interior component (such as a sheet metal part).

[0032] The diagrams in Figures 1 to 5 are drawn to scale. To maintain the brevity of the instruction manual, the proportions of each component are not listed in detail. However, the proportions and positions of each component should be considered part of the content of this instruction manual.

[0033] This embodiment provides a loudspeaker, particularly a thin loudspeaker, which serves as a midrange or bass driver unit in a vehicle audio system and can be installed in a vehicle. This embodiment also provides a vehicle audio system including the aforementioned thin loudspeaker.

[0034] Referring to Figures 1 to 5, the thin loudspeaker includes a bracket 1, a cone 2, a voice coil 3 connected to the cone 2, and a magnetic drive assembly 4 for driving the voice coil 3 to vibrate up and down. The loudspeaker is mounted on a sheet metal part of an automobile via the bracket 1, which is a one-piece injection-molded plastic part, including but not limited to PP (polypropylene) or PC (polycarbonate). The cone 2 and the magnetic drive assembly 4 are mounted on the bracket 1, and the voice coil 3 is located inside the bracket 1. The upper end of the voice coil 3 is connected to the cone 2, and the lower end is movably inserted into the magnetic gap 40 of the magnetic drive assembly 4. The magnetic drive assembly 4 provides a magnetic field. When an electrical signal is received, based on the principle of electromagnetic induction, the voice coil 2 vibrates up and down under the influence of the magnetic field, thereby driving the cone 2 to vibrate and produce sound, achieving electroacoustic conversion.

[0035] The diaphragm 2 includes an outer diaphragm 21 and an inner diaphragm 22. The outer diaphragm 21 has a first outer edge 211 and a first inner edge 212, with the first outer edge 211 being higher than the first inner edge 212 and connected to the support 1. The inner diaphragm 22 has a second outer edge 221, which is connected to the first inner edge 212, and the center of the inner diaphragm 22 arches upward relative to the second outer edge 221. Specifically, in this embodiment, from a top-down view, the outer diaphragm 21 and the inner diaphragm 22 are concentrically arranged annular rings, and the first outer edge 211 of the outer diaphragm 21 is fixed to the support 1 by a folding ring 23, for example, by adhesive.

[0036] The inner cone 22 has a second inner edge 222, which is higher than the second outer edge 221. The upper end of the voice coil 3 is connected to the inner cone 22, specifically to the second inner edge 222 of the inner cone 22, for example, by adhesive bonding. The second inner edge 222 of the inner cone 22 is lower than or level with the first outer edge 211 of the outer cone 21.

[0037] Furthermore, the outer cone 21 is a truncated inverted cone shape, wider at the top and narrower at the bottom, while the inner cone 22 is a truncated cone shape, narrower at the top and wider at the bottom. The inner cone 22 is inverted and placed on top of the outer cone 21. The first inner edge 212 of the outer cone 21 and the second outer edge 221 of the inner cone 22 are bonded together. Specifically, as shown in Figure 3, the first inner edge 212 and / or the second outer edge 221 are connected to an upwardly bent flange 24, which is stacked on top of the first inner edge 212 or the second outer edge 221 and bonded together. In this embodiment, both the first inner edge 212 and the second outer edge 221 are connected to an upwardly bent flange 24, forming two L-shaped structures. The first inner edge 212 and a flange 24 are stacked together, and the second outer edge 221 and a flange 24 are stacked together, bonded together with glue.

[0038] Both the outer cone 21 and the inner cone 22 are formed from thin sheet materials, such as paper or fabric sheets cut and integrally stamped, or they can be integrally formed from plastic (such as PP (polypropylene)). The surround 23 is elastic and can be made of rubber. The surround 23, the outer cone 21, and the inner cone 22 are bonded together in sequence. The outer cone 21 and the inner cone 22 have a certain degree of elasticity and can vibrate up and down under the drive of the voice coil 3.

[0039] The thin speaker also includes a positioning support 5, the outer edge of which is connected to the first inner edge 212 and / or the second outer edge 221. The outer edge of the positioning support 5 and the first inner edge 212 and / or the second outer edge 221 are stacked and bonded together with adhesive. Specifically, as shown in Figure 4, the outer edge of the positioning support 5 has an L-shaped structure with a downward concave center. The outer edge of the positioning support 5 is stacked below the first inner edge 212 of the outer cone 21, the second outer edge 221 of the inner cone 22, and the flange 24. The three layers are bonded together with adhesive.

[0040] The inner edge of the positioning support piece 5 is connected to the magnetic drive assembly 4. Specifically, the magnetic drive assembly 4 includes a U-shaped iron 41, which is fixed to the bottom 11 of the bracket 1. A central hole is provided in the middle of the positioning support piece 5, and the inner edge of the positioning support piece 5 surrounds the central hole. The inner edge of the positioning support piece 5 abuts against the outer surface of the U-shaped iron 41, and they can be further bonded together.

[0041] The bracket 1 has a protrusion 12 that protrudes upward from its bottom 11. The protrusion 12 is located outside the magnetic drive assembly 4 or surrounds the magnetic drive assembly 4. The positioning support 5 is also connected to the protrusion 12, for example by adhesive bonding.

[0042] The bottom 11 of the bracket 1 is also provided with a through hole 110, and the U-shaped iron 41 is placed above the through hole and completely covers the through hole 110.

[0043] The slim loudspeaker also includes a dust cap 6, which covers the voice coil 3. Furthermore, the outer edge of the dust cap 6 is fixedly attached to the upper end of the voice coil 3, for example, by adhesive.

[0044] Furthermore, the voice coil 3 has multiple airflow holes 30 to connect the space inside and outside the voice coil 3. It should also be noted that the positioning support 5 divides the space inside the bracket 1 into upper and lower parts. The lower space is enclosed between the outer cone 21, the positioning support 5 and the bracket 1; the upper space is formed between the inner cone 22, the dust cap and the positioning support 5, and also includes the aforementioned magnetic gap 40.

[0045] The cone 2 of this thin speaker includes two cones, an inner cone and an outer cone, which are combined together. The inner cone 22 is upside down on the outer cone 21. Without reducing the sound radiation surface of the cone 2, the height of the cone 2 and the support 1 is reduced, thereby reducing the overall height / thickness of the speaker and making the speaker thinner and lighter. At the same time, it is not necessary to increase the radial dimension of the magnetic drive assembly 4.

[0046] Features of the embodiments of this disclosure are set forth in the following terms:

[0047] Clause 1. A thin loudspeaker, comprising a bracket, a cone, a voice coil connected to the cone, and a magnetic drive assembly for driving the voice coil to vibrate up and down, wherein the cone comprises an outer cone and an inner cone;

[0048] The outer cone has a first outer edge and a first inner edge, the first outer edge being higher than the first inner edge, and the first outer edge being connected to the bracket;

[0049] The inner cone has a second outer edge, which is connected to the first inner edge, and the middle part of the inner cone arches upward relative to the second outer edge.

[0050] Clause 2. The thin loudspeaker according to Clause 1, wherein the inner cone has a second inner edge that is higher than the second outer edge.

[0051] Clause 3, the thin loudspeaker as described in Clause 2, wherein the upper end of the voice coil is connected to the second inner edge.

[0052] Clause 4. The thin loudspeaker as described in Clause 2, wherein the second inner edge is lower than or level with the first outer edge;

[0053] The outer cone is a truncated inverted cone that is larger at the top and smaller at the bottom, while the inner cone is a truncated cone that is smaller at the top and larger at the bottom.

[0054] Clause 5. The thin speaker according to Clause 1, wherein the first inner edge and the second outer edge are bonded to each other.

[0055] Clause 6. The thin speaker according to Clause 5, wherein the first inner edge and / or the second outer edge are connected to an upwardly bent flange, the flange being stacked on the first inner edge or the second outer edge and being attached and bonded to each other.

[0056] Clause 7. The thin loudspeaker according to Clause 1, wherein the thin loudspeaker further includes a positioning bracket, the outer edge of which is connected to the first inner edge and / or the second outer edge.

[0057] Clause 8. The thin loudspeaker according to Clause 7, wherein the outer edge of the positioning support and the first inner edge and / or the second outer edge are overlapped and bonded to each other.

[0058] Clause 9. The thin loudspeaker as described in Clause 7, wherein the inner edge of the positioning support is connected to the magnetic drive assembly;

[0059] The bracket has a protrusion that rises from its bottom, the protrusion being located outside the magnetic drive assembly or surrounding the magnetic drive assembly, and the positioning support plate is also connected to the protrusion.

[0060] Clause 10. A vehicle audio system, comprising a thin speaker as described in any one of Clauses 1 to 9.

[0061] As indicated in this specification and claims, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, and these steps and elements do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0062] Those skilled in the art will understand that, unless otherwise stated, the singular forms “a,” “the,” and “the” used herein may also include the plural forms. It will be further understood that “multiple” in this disclosure refers to two or more, and other quantifiers are similarly understood.

[0063] It is further understood that the terms "first," "second," etc., are used to describe various types of information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another, and do not indicate a specific order or degree of importance. In fact, the expressions "first," "second," etc., are completely interchangeable. For example, without departing from the scope of this disclosure, first information can also be referred to as second information, and similarly, second information can also be referred to as first information.

[0064] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0065] The above embodiments are only for illustrating the technical concept and features of this disclosure, and are preferred embodiments. Their purpose is to enable those skilled in the art to understand the content of this disclosure and implement it accordingly, and they cannot be used to limit the scope of protection of this disclosure.

Claims

1. A loudspeaker, comprising a bracket, a cone, a voice coil connected to the cone, and a magnetic drive assembly for driving the voice coil to vibrate up and down, the cone comprising an outer cone and an inner cone; The outer cone has a first outer edge and a first inner edge, the first outer edge being higher than the first inner edge, and the first outer edge being connected to the bracket; The inner cone has a second outer edge, which is connected to the first inner edge, and the middle part of the inner cone arches upward relative to the second outer edge.

2. The loudspeaker according to claim 1, characterized in that, The inner cone has a second inner edge, which is higher than the second outer edge.

3. The loudspeaker according to claim 2, characterized in that, The upper end of the voice coil is connected to the second inner edge.

4. The loudspeaker according to claim 2 or 3, characterized in that, The second inner edge is lower than or level with the first outer edge.

5. The loudspeaker according to any of the preceding claims, characterized in that, The outer cone is a truncated inverted cone that is larger at the top and smaller at the bottom, while the inner cone is a truncated cone that is smaller at the top and larger at the bottom.

6. The loudspeaker according to any of the preceding claims, characterized in that, The first inner edge and the second outer edge are bonded together.

7. The loudspeaker according to claim 6, characterized in that, The first inner edge is connected to an upwardly bent flange, which is stacked on the second outer edge and adhered to and bonded to each other.

8. The loudspeaker according to claim 6 or 7, characterized in that, The second outer edge is connected to an upwardly bent flange, which is stacked on the first inner edge and adhered to and bonded to each other.

9. The loudspeaker according to claim 1, characterized in that, The thin speaker also includes a positioning bracket, the outer edge of which is connected to the first inner edge and / or the second outer edge.

10. The loudspeaker according to claim 9, characterized in that, The outer edge of the positioning support piece overlaps and is bonded to the first inner edge and / or the second outer edge.

11. The loudspeaker according to claim 9 or 10, characterized in that, The inner edge of the positioning support piece is connected to the magnetic drive assembly.

12. The loudspeaker according to claim 9 or 10, characterized in that, The bracket has a protrusion that rises from its bottom, the protrusion being located outside the magnetic drive assembly or surrounding the magnetic drive assembly, and the positioning support plate being connected to the protrusion.

13. A vehicle audio system, characterized in that, Includes the loudspeaker as described in any of the preceding claims.

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