Loudspeaker and vehicle onboard sound system

Abstract

A loudspeaker and a vehicle onboard sound system. The loudspeaker comprises a mount, a diaphragm, and a face plate. The diaphragm is provided with a suspension edge, a center portion, and an arched portion. The suspension edge is connected to the mount, the arched portion is located between the suspension edge and the center portion and arches upward, and the outer edge of the face plate is connected to the mount and covers the diaphragm. The middle of the face plate is provided with a connecting portion that is sunken downward. The connecting portion is located above the center portion, and the connecting portion and the center portion are fixed to each other. In the loudspeaker, diaphragm deviation is prevented. Further, loudspeaker assembly is simplified.

Description

Speakers and car audio systems Related applications

[0001] This application claims priority to Chinese patent application No. CN 2023231643011 filed on November 23, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present disclosure belongs to the field of vehicle-mounted audio, and relates to a loudspeaker, in particular to a tweeter loudspeaker and a vehicle-mounted audio system. Background Art

[0003] The tweeter is one of the core components of the car audio system. After the tweeter is installed on the vehicle, it may produce a front cavity effect, that is, the sound waves radiated forward by the diaphragm will "gather" in the front cavity and collide with each other. The sound waves interfere with each other and cause air turbulence, resulting in deterioration of sound quality. Based on this, Chinese patent CN218772420U discloses a loudspeaker designed to improve the front cavity effect of the tweeter, which adopts a sound diaphragm with two convex ring parts, and the center of the sound diaphragm is bonded to the limiter above the magnetic circuit system to prevent the sound diaphragm from shifting. In this loudspeaker, the center of the sound diaphragm needs to be glued to the limiter, and the lower surface of the limiter needs to be fixed to the front piece. During mass production, the limiter is prone to shifting or not firmly glued. In addition, the number of parts of the loudspeaker increases, and the assembly process of the loudspeaker is more complicated. Summary of the Invention

[0004] An object of the present disclosure is to provide an improved loudspeaker capable of simplifying the assembly of the loudspeaker while preventing the diaphragm from shifting.

[0005] One aspect of the present disclosure relates to a loudspeaker, comprising a bracket, a diaphragm and a panel, wherein the diaphragm has a hanging edge, a central portion and a raised portion, the hanging edge being connected to the bracket, the raised portion being located between the hanging edge and the central portion and arching upward, the outer edge of the panel being connected to the bracket and covering the diaphragm; the middle portion of the panel having a downwardly recessed connecting portion, the connecting portion being located above the central portion, and the connecting portion and the central portion being fixed to each other.

[0006] In one embodiment, the connecting portion and the central portion are bonded to each other.

[0007] In one embodiment, a glue sinking groove is provided on the lower surface of the connecting portion, and the glue sinking groove is used to accommodate glue liquid.

[0008] In one embodiment, a plurality of the glue sinking grooves are provided on the lower surface of the connecting portion, and the plurality of the glue sinking grooves are distributed in a concentric ring shape.

[0009] In one embodiment, the central portion is flat.

[0010] In one embodiment, the flat plate-shaped central portion and the lower surface of the connecting portion are parallel to each other.

[0011] In one embodiment, the arched portion includes a first arched portion and a second arched portion, each of which is annular and arched upward, the first arched portion is connected to the central portion, the second arched portion is connected between the first arched portion and the hanging edge, the central portion is level with the lowest points of the first arched portion and the second arched portion, or the central portion is lower than the lowest points of the first arched portion and the second arched portion.

[0012] In one embodiment, the panel further has a first convex portion located above the first arched portion, and a second convex portion located above the second arched portion, the first convex portion is arranged around the connecting portion, and the first convex portion and the second convex portion are both higher than the connecting portion.

[0013] In one embodiment, the first convex portion and the second convex portion include a plurality of strip-shaped ribs, the plurality of ribs intersect each other, and a plurality of sound-transmitting holes are formed between the ribs.

[0014] In one embodiment, the central portion is located above the magnetic circuit component and a gap exists between the central portion and the magnetic circuit component.

[0015] In one embodiment, in a top view, the connecting portion is circular, a plurality of radially extending ribs of the panel converge at the connecting portion, and the radially extending ribs have at least two upwardly arched sections.

[0016] In one embodiment, the speaker is a tweeter, which refers to a speaker that emits sound in a frequency band above 1 kHz.

[0017] Yet another aspect of the present disclosure provides a vehicle-mounted audio system, comprising a tweeter sound unit, wherein the tweeter sound unit comprises the speaker according to any one of the preceding claims.

[0018] The speaker disclosed herein has a diaphragm whose central portion is recessed relative to its outer arched portion, and a panel whose middle portion is recessed to form a connecting portion. The connecting portion and the central portion of the diaphragm are bonded and fixed to each other, effectively preventing the diaphragm from shifting while avoiding the addition of additional components. It also has better reliability and simplifies the assembly of the speaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] FIG1 is a top view of a loudspeaker according to an embodiment of the present disclosure;

[0021] FIG2 is a cross-sectional view taken along the line AA in FIG1 ;

[0022] FIG3 is a partial enlarged view of point B in FIG2 ;

[0023] FIG4 is an exploded schematic diagram of a speaker according to an embodiment of the present disclosure;

[0024] in,

[0025] 1 - bracket; 11 - first welding piece; 12 - second welding piece; 13 - third outer edge; 14 - third inner edge; 15 - main body; 150 - groove;

[0026] 2 - diaphragm; 21 - surround; 22 - center; 23 - first arch; 230 - first inner edge; 231 - first outer edge; 24 - second arch; 240 - second inner edge; 241 - second outer edge;

[0027] 3 - panel; 31 - connection part; 310 - glue sinking groove; 32 - first protrusion; 320 - sound hole; 33 - second protrusion;

[0028] 4 - magnetic circuit system; 41 - front plate; 42 - magnetic steel; 43 - U iron; 44 - magnetic gap;

[0029] 5 - Voice coil;

[0030] 6 - Pad with cotton. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present disclosure are described in detail below with reference to 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.

[0032] In this disclosure, the terms "inside" and "outside" are defined relative to the centerline of the speaker's 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 the speaker's structure and are not intended to limit the speaker's installation configuration. For example, the speaker can be mounted on the upper, lower, upright, or inclined surface of an interior vehicle component (such as a sheet metal part).

[0033] This embodiment provides a speaker, specifically a tweeter, which can be used as a high-frequency sound-producing unit in an in-vehicle audio system. The sound emitted is concentrated in the frequency band above 1 kHz. Referring to Figures 1 to 4 , the speaker includes a bracket 1, a diaphragm 2 mounted on the bracket, a panel 3, a magnetic circuit system 4, and a voice coil 5.

[0034] Furthermore, a magnetic circuit system 4 is disposed at the bottom of the bracket 1. It comprises a front plate 41, a magnet 42, and a U-shaped iron 43. The front plate 41 and magnet 42 surround the U-shaped iron 43, forming a magnetic gap 44 between the outer surfaces of the front plate 41 and magnet 42 and the inner surface of the U-shaped iron 43, allowing the voice coil 5 to be inserted. This magnetic circuit system 4 has an internal magnetic structure. The diaphragm 2 is connected to the top of the bracket 1. The voice coil 5 has an upper end connected to the diaphragm 2 and a lower end that can be inserted into the magnetic gap 44 and moved up and down.

[0035] As shown in Figures 2 and 4 , the diaphragm 2 includes a rim 21, a center portion 22, and arched portions. The arched portions include a first arched portion 23 and a second arched portion 24, each of which is annular and upwardly arched. Furthermore, the center portion 22 is flat and circular when projected on a horizontal plane. The arched portions are located between the rim 21 and the center portion 22 and arch upward. The longitudinal cross-section of the first arched portion 23 and the second arched portion 24 is roughly two spaced-apart hollow semicircles, and the first and second arched portions 23, 24 are of equal height.

[0036] Furthermore, a first arched portion 23 is disposed around the central portion 22. The first arched portion 23 has a first inner edge 230 and a first outer edge 231. The first inner edge 230 is connected to the central portion 22. The height of the first arched portion 23 gradually increases and then gradually decreases from the first inner edge 230 to the first outer edge 231. A second arched portion 24 is disposed around the first arched portion 23. The second arched portion 24 is connected between the first arched portion 23 and the skirt 21. The second arched portion 24 has a second inner edge 240 and a second outer edge 241. The second inner edge 240 is connected to the first outer edge 231. The height of the second arched portion 24 gradually increases and then gradually decreases from the second inner edge 240 to the second outer edge 241. The second outer edge 241 is connected to the skirt 21. The height of the skirt 21 is lower than the highest point of the first arched portion 23 or the second arched portion 24. The skirt 21 is connected to the bracket 1, so that the diaphragm 2 covers the voice coil 5.

[0037] The center portion 22 is flush with the lowest points of the first and second arched portions 23, 24, or the center portion 22 is lower than the lowest points of the first and second arched portions 23, 23. The center portion 22 is at least lower than the highest point of the first and second arched portions 23, 24. The upper end of the voice coil 5 is connected to the first outer edge 231, the second inner edge 240, or the junction of the two. Specifically, in this embodiment, the upper end of the voice coil 5 is connected to the first outer edge 231.

[0038] The front piece 41 and magnet 42 of the magnetic circuit system 4 are stacked in sequence on a U-shaped iron 43. The outer edge of the U-shaped iron 43 extends upward and is fixedly connected to the lower portion of the bracket 1. The lower surface of the front piece 41 is bonded to the upper surface of the magnet 42, and the lower surface of the magnet 42 is bonded to the bottom plate of the U-shaped iron 43. The magnet 42 and the front piece 41 are located between the diaphragm 2 and the U-shaped iron 43. The voice coil 5 is inserted in the magnetic gap 44. The magnitude and direction of the magnetic field generated by the voice coil 5 continuously change with the current. The magnetic circuit system 4 generates a vertical magnetic field with a constant magnitude. The voice coil 5 reciprocates along a motion axis (i.e., the centerline of the voice coil 5).

[0039] As shown in Figures 2 to 4 , bracket 1 has a third outer edge 13, a third inner edge 14, and a main body 13 connected therebetween. Third outer edge 13 is higher than third inner edge 14. Diaphragm 2 is connected to third outer edge 13, and magnetic circuit system 4 is connected to third inner edge 13. Main body 15 has a downwardly extending groove 150, with second arched portion 24 located above groove 150. The speaker also includes first and second soldering tabs 11 and 12, which are mounted on bracket 1.

[0040] As shown in Figures 1 to 4 , the speaker's panel 3 is positioned over the diaphragm 2 and connected to the bracket 1 . A downwardly recessed connecting portion 31 is formed in the middle of the panel 3 . The connecting portion 31 is located above the central portion 22 . The lower surfaces of the central portion 22 and the connecting portion 31 are parallel to each other. The connecting portion 31 and the central portion 22 are bonded together for a secure connection. The connecting portion 31 is circular when viewed from above. Multiple radially extending ribs on the panel 3 converge at the connecting portion 31 . These radially extending ribs have at least two upwardly arched sections.

[0041] Furthermore, the panel 3 also has a first protrusion 32 and a second protrusion 33. The first protrusion 32 cooperates with the first arched portion 23 and covers the first arched portion 23. The second protrusion 33 cooperates with the second arched portion 24 and covers the second arched portion 24. The first protrusion 32 is arranged around the connecting portion 31, and the second protrusion 33 is arranged outside the first protrusion 32. The first protrusion 32 and the second protrusion 33 are both higher than the connecting portion 31. The first protrusion 32 and the second protrusion 33 are composed of intersecting strip-shaped ribs, and a plurality of sound-transmitting holes 320 are formed between the ribs.

[0042] Furthermore, one or more glue grooves 310 are provided on the lower surface of the connecting portion 31 of the panel 3. Specifically in this embodiment, the number of the glue grooves 310 is two groups, and the glue grooves 310 are in the shape of concentric rings for accommodating glue. The glue grooves 310 are recessed along the center line direction of the voice coil 5 (specifically as shown in 3, the glue grooves 310 extend upward from the lower surface of the connecting portion 31). The glue in the glue grooves 3 and the inner edge of the center portion 22 of the diaphragm 2 are in contact with each other. The glue layer formed after the glue is cured has a larger contact area with the center portion 22 of the diaphragm 2, thereby improving the bonding strength and preventing the diaphragm 2 from shifting. During assembly, a layer of glue is applied to the lower surface of the connecting portion 31 of the panel 3. Due to the leveling properties of the glue itself, part of the glue flows into each glue groove 31, aligning and contacting the center portion 22 of the diaphragm 2 and the connecting portion 31. After the glue is cured, the connection is completed.

[0043] The loudspeaker further comprises a padding 6. In a top view, the padding 6 is circular in shape as a whole and is bonded to the bracket 1 by glue, so that the padding 6 can play a role of buffering protection.

[0044] In this embodiment, the padding 6, panel 3, diaphragm 2, bracket 1, front piece 41 and magnet 42 are stacked in sequence from top to bottom, the diaphragm 2 covers the voice coil 5, the suspension edge 21 of the diaphragm 2 and the upper surface of the third outer edge 13 of the bracket 1 are fixedly connected, and the connecting part 31 of the panel 3 is provided with four annular glue grooves 310 by integral stamping. The glue grooves 310 contain glue, which can improve the bonding strength between the diaphragm 2 and the panel 3 and prevent the diaphragm 2 from shifting.

[0045] The above-mentioned loudspeaker has at least the following advantages:

[0046] The speaker's panel 3's connecting portion 31 is glued to the center portion 22 of the diaphragm 2, preventing the diaphragm 2 from shifting without requiring additional stoppers or other components. This diaphragm 2 effectively prevents the front cavity effect. Furthermore, a glue sink 310 is provided on the connecting portion 31. This sink contains glue, which improves the bond strength between the panel 3 and the center portion 22 of the diaphragm 2, preventing the diaphragm 2 from shifting and enhancing the reliability of the speaker's gluing. Furthermore, the elimination of stoppers optimizes the structure, streamlines production steps, and simplifies assembly.

[0047] Features of embodiments of the present disclosure are set forth in the following clauses:

[0048] Item 1. A loudspeaker comprising a bracket, a diaphragm and a panel, wherein the diaphragm has a hanging edge, a central portion and a raised portion, the hanging edge is connected to the bracket, the raised portion is located between the hanging edge and the central portion and is raised upward, the outer edge of the panel is connected to the bracket and covers the diaphragm; the middle portion of the panel has a downwardly recessed connecting portion, the connecting portion is located above the central portion, and the connecting portion and the central portion are bonded to each other.

[0049] Item 2. The loudspeaker according to Item 1, wherein one or more glue sinking grooves are provided on the lower surface of the connecting portion.

[0050] Item 3. The loudspeaker according to Item 2, wherein the plurality of said glue sinking grooves are in the shape of concentric rings.

[0051] Clause 4. The loudspeaker according to clause 1, wherein the central portion is flat-plate-shaped.

[0052] Clause 5. The loudspeaker according to Clause 4, wherein the flat plate-shaped central portion and the lower surface of the connecting portion are parallel to each other.

[0053] Item 6. A loudspeaker according to Item 1, wherein the arched portion includes a first arched portion and a second arched portion, each of which is annular and arched upward, the first arched portion is connected to the central portion, the second arched portion is connected between the first arched portion and the suspension edge, the central portion is flush with the lowest points of the first arched portion and the second arched portion, or the central portion is lower than the lowest points of the first arched portion and the second arched portion.

[0054] Item 7. A speaker according to Item 6, wherein the panel further has a first protrusion located above the first arched portion, and a second protrusion located above the second arched portion, the first protrusion is arranged around the connecting portion, and the first protrusion and the second protrusion are both higher than the connecting portion.

[0055] Clause 8. The loudspeaker according to clause 7, wherein the first convex portion and the second convex portion are formed by mutually intersecting strip-shaped ribs, and a plurality of sound-transmitting holes are formed between the ribs.

[0056] Item 9. The loudspeaker according to Item 1, wherein the central portion is located above the magnetic circuit assembly with a gap therebetween.

[0057] Item 10. A loudspeaker according to Item 1, wherein, when viewed from above, the connecting portion is circular, a plurality of radially extending ribs of the panel converge at the connecting portion, and the radially extending ribs have at least two upwardly arched sections.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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 is not intended to limit the scope of protection of the present disclosure.

Claims

1. A speaker, comprising: Bracket; A diaphragm, comprising a suspension edge, a central portion and an arched portion, wherein the suspension edge is connected to the support, and the arched portion is located between the suspension edge and the central portion and arches upward; A panel, the outer edge of which is connected to the bracket and covers the diaphragm; Wherein, the middle part of the panel has a connection part which is recessed downwards, the connection part is located above the central part, and the connection part and the central part are fixed.

2. The loudspeaker according to claim 1, characterized in that The connecting portion and the central portion are bonded to each other.

3. The loudspeaker according to claim 1 or 2, characterized in that: A glue sinking groove for accommodating glue liquid is provided on the lower surface of the connecting part.

4. The loudspeaker according to claim 3, characterized in that A plurality of the glue sinking grooves are arranged on the lower surface of the connecting portion, and the plurality of the glue sinking grooves are distributed in a concentric ring shape.

5. A loudspeaker according to any preceding claim, characterised in that The central portion is in the shape of a flat plate.

6. The loudspeaker according to claim 5, characterized in that The flat plate-shaped central portion and the lower surface of the connecting portion are parallel to each other.

7. A loudspeaker according to any preceding claim, characterised in that The arched portion includes a first arched portion and a second arched portion, the first arched portion and the second arched portion are respectively annular and arched upward, the first arched portion is connected to the central portion, the second arched portion is connected between the first arched portion and the hanging edge, the central portion is level with the lowest points of the first arched portion and the second arched portion, or the central portion is lower than the lowest points of the first arched portion and the second arched portion.

8. The loudspeaker according to claim 7, characterized in that The panel further comprises a first convex portion located above the first arched portion, and a second convex portion located above the second arched portion, the first convex portion is arranged around the connecting portion, and both the first convex portion and the second convex portion are higher than the connecting portion.

9. The loudspeaker according to claim 8, characterized in that The first convex portion and the second convex portion include a plurality of strip-shaped ribs, the plurality of ribs intersect each other, and a plurality of sound-transmitting holes are formed between the ribs.

10. A loudspeaker according to any preceding claim, characterised in that The central portion is located above the magnetic circuit component with a gap therebetween.

11. A loudspeaker according to any preceding claim, characterised in that In a top view, the connection portion is circular, and a plurality of radially extending ribs of the panel converge at the connection portion, and the radially extending ribs have at least two upwardly arched sections.

12. A vehicle audio system, comprising a tweeter sound unit, wherein the tweeter sound unit comprises the loudspeaker according to any one of the preceding claims.

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