Loudspeaker and automobile sound system

Abstract

The utility model discloses a loudspeaker and an automobile sound system. The loudspeaker comprises a support, a vibrating diaphragm hung on the support, a voice coil connected to the vibrating diaphragm and a magnetic circuit driving the voice coil to vibrate along the center line of the voice coil, the magnetic circuit is located on the rear side of the vibrating diaphragm, the loudspeaker comprises a single positioning support chip, the positioning support chip comprises a corrugated part and a connecting edge surrounding the corrugated part, and the connecting edge is located on the rear side of the vibrating diaphragm. The corrugated part is provided with wave crests and wave troughs, the corrugated part is connected to the voice coil, and the connecting edge is connected to the support or the magnetic circuit; the positioning support chip is located between the vibrating diaphragm and the magnetic circuit, the wave crests and the wave troughs of the corrugated part are located in front of the connecting edge, or the wave crests and the wave troughs of the corrugated part are located behind the connecting edge. According to the bass loudspeaker with the single magnetic circuit and the single positioning support chip, on the premise that the power requirement is met, the overall size is small, the weight is light, meanwhile, assembling is easy, and cost is low.

Description

Technical Field

[0001] This utility model relates to a loudspeaker and a car audio system. Background Technology

[0002] Speakers that make up a car audio system are installed in the door panels, headliner, seats, and other components of the vehicle. These speakers require lightweight, small size, and high power, with woofers also needing good low-frequency extension. Currently, some speakers use a multi-magnetic-circuit design, driving the diaphragm to vibrate and produce sound through multiple magnetic circuits and voice coils. While this design increases power, the large size and weight due to the multiple voice coils result in relatively low sensitivity, and the assembly process and material costs are also high. Furthermore, multi-magnetic-circuit designs generate more heat during operation, requiring consideration of heat dissipation. Other speakers are driven by a single magnetic circuit, using a powerful external magnet scheme including a T-iron, along with multiple positioning supports. While this meets certain power requirements and is lighter and has better low-frequency extension compared to multi-magnetic-circuit designs, the assembly process is more demanding and complex, resulting in higher costs.

[0003] 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. Utility Model Content

[0004] This invention provides an improved loudspeaker, specifically a woofer with a single magnetic circuit and a single positioning support plate. While meeting power requirements, it is small in size, light in weight, and relatively simple to assemble, resulting in lower cost.

[0005] The first aspect of this utility model provides a loudspeaker, including a bracket, a diaphragm suspended on the bracket, a voice coil connected to the diaphragm, and a magnetic circuit for driving the voice coil to vibrate along its own centerline. The magnetic circuit is located behind the diaphragm. The loudspeaker includes a single positioning support, which includes a corrugated portion and a connecting edge surrounding the corrugated portion. The corrugated portion has crests and troughs. The corrugated portion is connected to the voice coil, and the connecting edge is connected to the bracket or the magnetic circuit. The positioning support is located between the diaphragm and the magnetic circuit. The crests and troughs of the corrugated portion are both located in front of the connecting edge, or the crests and troughs of the corrugated portion are both located behind the connecting edge.

[0006] In a preferred embodiment, the connecting edge is located in a first plane, which is perpendicular to the center line of the voice coil; the crest or trough is located in a second plane, which is perpendicular to the center line of the voice coil, and the first plane and the second plane are parallel and spaced apart.

[0007] In a more preferred embodiment, the second plane is located in front of the first plane.

[0008] In a more preferred embodiment, the ratio of the distance between the first plane and the second plane to the distance between the middle part of the diaphragm and the magnetic circuit is 0.2 to 0.8.

[0009] In a preferred embodiment, the corrugated portion has a central hole, the voice coil passes through the central hole, and the corrugated portion surrounds the voice coil and is fixedly connected to the outer surface of the voice coil.

[0010] In a more preferred embodiment, the orthographic projection of the corrugated portion and the connecting edge onto a plane perpendicular to the center line of the voice coil is a concentric ring.

[0011] In a more preferred embodiment, the orthographic projection of the diaphragm onto a plane perpendicular to the centerline of the voice coil is elliptical, or the orthographic projection has a pair of parallel long sides and a pair of parallel short sides, the length of the long sides being greater than the length of the short sides.

[0012] In a preferred embodiment, the bracket includes an outer fixing ring and a bracket bottom recessed relative to the outer fixing ring. The diaphragm is suspended on the outer fixing ring. A magnetic circuit mounting hole is provided at the bottom of the bracket. The magnetic circuit is fixed on the bottom of the bracket. The voice coil passes through the magnetic circuit mounting hole and is inserted into the magnetic gap of the magnetic circuit.

[0013] In a more preferred embodiment, the connecting edge of the positioning support is fixed to the bottom of the bracket, and the magnetic gap is blocked by the positioning support; a slot is provided on the bottom of the bracket, and the upper part of the magnetic circuit is locked in the slot.

[0014] In a further preferred embodiment, the magnetic circuit includes a T-iron with a cylindrical portion, a magnet sleeved on the cylindrical portion, and a front piece that is engaged in the slot.

[0015] In a more preferred embodiment, the bracket has a hollow portion located between the outer fixing ring and the bottom of the bracket, with a portion of the diaphragm facing the hollow portion.

[0016] A second aspect of this utility model provides an automotive audio system, including a subwoofer, the subwoofer comprising the aforementioned speaker.

[0017] The present invention adopts the above solution and has the following advantages compared with the prior art:

[0018] The loudspeaker of this invention adopts a single magnetic circuit and single positioning support structure. While meeting the power requirements to obtain a better sound pressure level, it has a small overall size and light weight. At the same time, it is relatively simple to assemble and has a low cost; it also solves the problem of insufficient installation space. Attached Figure Description

[0019] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a front view of a loudspeaker according to an embodiment of the present invention.

[0021] Figure 2 This is an exploded view of a loudspeaker according to an embodiment of the present invention.

[0022] Figure 3 This is a structural diagram of the bracket according to an embodiment of the present utility model.

[0023] Figure 4 This is a structural diagram of the positioning support piece according to an embodiment of the present utility model.

[0024] Figure 5 This is a cross-sectional view along the center line of the voice coil according to an embodiment of the present invention.

[0025] Figure 6 This is a partial schematic diagram according to an embodiment of the present utility model.

[0026] Figure 7 for Figure 6 A magnified view of a portion of point A in the middle.

[0027] Figure 8 The frequency response curves are for the examples and comparative examples.

[0028] In the above attached figures,

[0029] 1. Bracket; 11. Outer fixing ring; 12. Bracket bottom; 121. Magnetic circuit mounting hole; 122. Slot; 123. Positioning protrusion; 13. Hollowed-out part; 2. Diaphragm; 3. Voice coil; 4. Magnetic circuit; 40. Magnetic gap; 41. T-iron; 411. Cylindrical part; 42. Magnet; 43. Front piece; 5. Positioning support piece; 51. Corrugated part; 511. Corrugated peak; 512. Corrugated trough; 52. Connecting edge; 6. Pressure plate; 7. Dust cap;

[0030] C, centerline; P1, first plane; P2, second plane. Detailed Implementation

[0031] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention 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 the present invention, but does not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] In this article, "inner" and "outer" are defined with reference to the speaker, with the position closer to the speaker considered "inner" and the opposite position considered "outer." The directional terms "upper," "lower," and "horizontal" are intended to help those skilled in the art understand the structure of the vehicle speaker and are not used to limit the state of the vehicle speaker after it is installed in the usage scenario. For example, a vehicle speaker can be installed on a horizontal, inclined, or vertical surface of a vehicle.

[0033] Figures 1 to 7 The diagrams are drawn to scale. To keep the instructions concise, the proportions of each component are not listed individually. However, the proportions and positions of each component should be considered part of the contents of this instruction manual.

[0034] Example

[0035] Reference Figures 1 to 7 As shown, this embodiment relates to a loudspeaker, specifically a single-magnetic-circuit, single-positioning-support vehicle subwoofer, which, while meeting power requirements, has a small overall size, light weight, and is relatively simple to assemble, resulting in lower cost. This embodiment also relates to a car audio system, which includes a subwoofer, the subwoofer comprising... Figures 1 to 7 The speaker shown.

[0036] Reference Figures 1 to 7 As shown, the loudspeaker includes a bracket 1, a diaphragm 2 suspended on the bracket 1, a voice coil 3 connected to the diaphragm 2, and a magnetic circuit 4 that drives the voice coil 3 to vibrate along its own center line C. The magnetic circuit 4 is located on the rear side of the diaphragm 2 (i.e., Figure 5 and Figure 6(Lower side of the speaker). The loudspeaker includes a single positioning support 5, that is, there is only one positioning support 5. The positioning support 5 includes a corrugated portion 51 and a connecting edge 52 surrounding the corrugated portion 51. The corrugated portion 51 has crests 511 and troughs 512, which can generate deformation and restrict the voice coil 3 to reciprocate only along its center line C, avoiding wobbling in directions other than the direction of the center line C, especially avoiding wobbling in the direction of the center line C. Viewed along the direction of the center line C of the voice coil 3, the connecting edge 52, the crests 511, and the troughs 512 are concentric rings. There are multiple crests 511 and troughs 512, which are staggered. The distance between the troughs 512 and the diaphragm 2 is greater than the distance between the crests 511 and the diaphragm 2. The corrugated portion 51 is connected to the voice coil 3, preferably fixed to the outer surface of the voice coil 3, for example, by gluing it to the voice coil 3. The connecting edge 52 is connected to the bracket 1 or the magnetic circuit 4; in this embodiment, the connecting edge 52 is fixedly connected to the bracket 1, for example by adhesive.

[0037] The positioning support 5 is located between the diaphragm 2 and the magnetic circuit 4. The crests 511 and troughs 512 of the corrugated portion 51 are both located in front of the connecting edge 52, or the crests 511 and troughs 512 of the corrugated portion 51 are both located behind the connecting edge 52. Specifically, in this embodiment, the corrugated portion 51 is entirely located in front of the connecting edge 52; for example... Figures 5 to 7 As shown, the crest 511 arches upward relative to the connecting edge 52, that is, the entire corrugated part 51 is located above the connecting edge 52, and all the crests 511 and troughs 512 are higher than the connecting edge 52.

[0038] Combination Figure 6 and Figure 7 As shown, the connecting edge 52 is located in a first plane P1, which is perpendicular to the center line C of the voice coil 3. The crests 511 or troughs 512 of the corrugated portion 51 are located in a second plane perpendicular to the center line C of the voice coil 3. The first and second planes are parallel and spaced apart. Specifically, all the troughs 512 are located in the same second plane P2, which is perpendicular to the center line C of the voice coil 3; all the troughs 512 are located in the same plane (another second plane). In this embodiment, the second plane is located in front of the first plane. The ratio of the distance between the first plane P1 and the second plane P2 to the distance between the center of the diaphragm 2 and the magnetic circuit 4 is 0.2 to 0.8; more specifically, 0.3 to 0.5.

[0039] The corrugated portion 51 has a central hole through which the voice coil 3 passes. The corrugated portion 51 surrounds the voice coil 3 and is fixedly connected to the outer surface of the voice coil 3. The orthographic projection of the corrugated portion 51 (including each crest 511 and trough 512) and the connecting edge 52 onto a plane perpendicular to the center line C of the voice coil 3 is a concentric ring. The main material of the positioning support 5 includes paper, fabric, etc., which can produce a certain degree of elastic deformation. A dust cap 7 is provided on the upper part of the voice coil 3 to seal the upper end of the voice coil 3 and prevent dust and other foreign objects from entering the speaker. The dust cap 7 can be fixed to the end of the voice coil 3 with glue.

[0040] The orthographic projection of the diaphragm 2 onto a plane perpendicular to the center line C of the voice coil 3 (the first plane P1, the second plane P2, or any plane parallel to it) is elliptical, or the orthographic projection has a pair of parallel long sides and a pair of parallel short sides, with the length of the long side being greater than the length of the short side, such as... Figure 2 As shown.

[0041] The bracket 1 includes an outer fixing ring 11 and a bracket bottom 12 recessed relative to the outer fixing ring 11. The diaphragm 2 is suspended on the outer fixing ring 11, for example, by adhesive bonding to the upper surface of the outer fixing ring 11. The bracket bottom 12 has a magnetic circuit mounting hole 121, and a magnetic circuit 4 is fixed to the bracket bottom 12. The voice coil 3 passes through the magnetic circuit mounting hole 121 and is inserted into the magnetic gap 40 of the magnetic circuit 4. The outer fixing ring 11 also has multiple mounting holes that can be fitted with screws or other locking components for easy installation on a vehicle.

[0042] The connecting edge 52 of the positioning support piece 5 is fixed to the bottom 12 of the bracket. Further, the bottom 12 of the bracket has a positioning protrusion 123 extending upwards from its upper surface. The positioning protrusion 123 surrounds the positioning support piece 5, and the connecting edge 52 is confined between the positioning protrusions 123. The magnetic gap 40 is located below the positioning support piece 5 and is shielded by it. The bottom 12 of the bracket also has a slot 122, in which the upper part of the magnetic circuit 4 is engaged. Specifically, the magnetic circuit 4 includes a T-iron 41 with a cylindrical portion 411, a magnet 42 fitted onto the cylindrical portion 411, and a front piece 43, which is engaged in the slot 123. The magnet 42 and the front piece 43 are fixedly connected by adhesive. The magnet 42 is fixed to the T-iron 41 by adhesive, and the magnetic gap 40 is formed between the cylindrical portion 411 of the T-iron 41 and the inner surfaces of the magnet 42 and the front piece 43.

[0043] The bracket 1 has a perforated portion 13 located between the outer fixing ring 11 and the bottom 12 of the bracket, with part of the diaphragm 2 facing the perforated portion 13 to allow airflow. This speaker is a woofer, therefore the diaphragm 2 has a tapered portion. Furthermore, the diaphragm 2 also has an upwardly arched reinforcing portion.

[0044] Comparative Example

[0045] A comparative example provides a loudspeaker, differing from the loudspeaker in the only differences in the number of magnetic circuits and voice coils, as well as the positioning support. Specifically, there are two magnetic circuits driving two voice coils to vibrate the diaphragm; the positioning support is connected between the diaphragm and the support frame.

[0046] Performance Comparison

[0047] Sound performance tests were conducted on the speakers used in the embodiment and the comparative example, both with identical specifications and test conditions. The frequency response curves of the two speakers are shown below. Figure 8 As shown, the sound pressure level of the loudspeaker in this embodiment is comparable to that of the loudspeaker in the multi-magnetic circuit 4 of the comparative example, and is even superior to that of the comparative example in some frequency bands.

[0048] The loudspeaker in this embodiment adopts a single magnetic circuit 4-single positioning support 5 structure. While meeting the power requirements to obtain a better sound pressure level, it has a small overall size and light weight. At the same time, the assembly is relatively simple and the cost is low; it also solves the problem of insufficient installation space.

[0049] 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.

[0050] It can be further understood that in this disclosure, "multiple" refers to two or more, and other quantifiers are similar.

[0051] 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.

[0052] The above embodiments are only for illustrating the technical concept and features of this utility model, and are preferred embodiments. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly, and they cannot be used to limit the protection scope of this utility model.

Claims

1. A loudspeaker, comprising a bracket, a diaphragm suspended on the bracket, a voice coil connected to the diaphragm, and a magnetic circuit for driving the voice coil to vibrate along its own centerline, the magnetic circuit being located behind the diaphragm, characterized in that, The loudspeaker includes a single positioning support, which includes a corrugated portion and a connecting edge surrounding the corrugated portion. The corrugated portion has crests and troughs. The corrugated portion is connected to the voice coil, and the connecting edge is connected to the bracket or the magnetic circuit. The positioning support is located between the diaphragm and the magnetic circuit. The crests and troughs of the corrugated portion are both located in front of the connecting edge, or the crests and troughs of the corrugated portion are both located behind the connecting edge.

2. The loudspeaker according to claim 1, characterized in that, The connecting edge is located in a first plane, which is perpendicular to the center line of the voice coil; the crest or trough is located in a second plane that is perpendicular to the center line of the voice coil, and the first plane and the second plane are parallel and spaced apart.

3. The loudspeaker according to claim 2, characterized in that, The second plane is located in front of the first plane.

4. The loudspeaker according to claim 2, characterized in that, The ratio of the distance between the first plane and the second plane to the distance between the middle part of the diaphragm and the magnetic circuit is 0.2 to 0.

8.

5. The loudspeaker according to any one of claims 1 to 4, characterized in that, The corrugated portion has a central hole, through which the voice coil passes, and the corrugated portion surrounds the voice coil and is fixedly connected to the outer surface of the voice coil.

6. The loudspeaker according to claim 5, characterized in that, The corrugated portion and the connecting edge are projected onto a plane perpendicular to the center line of the voice coil as concentric rings; the diaphragm is projected onto a plane perpendicular to the center line of the voice coil as an ellipse, or the projection has a pair of parallel long sides and a pair of parallel short sides, with the length of the long side being greater than the length of the short side.

7. The loudspeaker according to any one of claims 1 to 4, characterized in that, The bracket includes an outer fixing ring and a bracket bottom recessed relative to the outer fixing ring. The diaphragm is suspended on the outer fixing ring. A magnetic circuit mounting hole is provided at the bottom of the bracket. The magnetic circuit is fixed on the bottom of the bracket. The voice coil passes through the magnetic circuit mounting hole and is inserted into the magnetic gap of the magnetic circuit.

8. The loudspeaker according to claim 7, characterized in that, The connecting edge of the positioning support is fixed to the bottom of the bracket, and the magnetic gap is blocked by the positioning support; a slot is provided on the bottom of the bracket, and the upper part of the magnetic circuit is locked in the slot; the magnetic circuit includes a T-iron with a cylindrical part, a magnet sleeved on the cylindrical part, and a front piece, and the front piece is locked in the slot.

9. The loudspeaker according to claim 7, characterized in that, The bracket has a hollowed-out section located between the outer fixing ring and the bottom of the bracket, with part of the diaphragm facing the hollowed-out section.

10. A car audio system, comprising a subwoofer, characterized in that, The subwoofer includes the speaker as described in any one of claims 1 to 9.

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