Vehicle-mounted low-frequency vibrator and car audio system

Abstract

The present invention discloses a vehicle-mounted low-frequency vibrator and a car audio system. The vehicle-mounted low-frequency vibrator includes a bracket, a voice coil, and a magnetic circuit system. The magnetic circuit system has a magnetic gap, the upper end of the voice coil is inserted into the magnetic gap, and the lower end of the voice coil is connected to the bracket; the vehicle-mounted low-frequency vibrator also includes a first positioning support and a second positioning support, the first positioning support and the second positioning support respectively include an outer connecting edge, an inner connecting edge, and a main body connected between the outer connecting edge and the inner connecting edge, and the main body is made of fabric; the outer connecting edge of the first positioning support is connected to the top of the bracket, and the inner connecting edge of the first positioning support is connected to the upper part of the magnetic circuit system; the second positioning support is located below the first positioning support, the outer connecting edge of the second positioning support is connected to the lower part of the bracket, and the inner connecting edge of the second positioning support is connected to the lower part of the magnetic circuit system. The vehicle-mounted low-frequency vibrator of the present invention has a low resonance frequency at low frequencies, which helps to create a better 4D effect in the car.

Description

Technical Field

[0001] The invention relates to a vehicle-mounted low-frequency vibrator and a vehicle audio system. Background Art

[0002] Low-frequency vibrators can be installed in car seats to produce low-frequency sound and vibration, thereby creating a 4D effect in conjunction with the speakers of the car audio system (such as door panel speakers). The low-frequency vibrator includes a voice coil and a magnetic circuit system that provides a magnetic field for the voice coil. When the voice coil is energized, it interacts with the magnetic field of the magnetic circuit system to produce electromagnetic interaction, causing the voice coil to reciprocate axially, thereby outputting bass or vibration. However, the voice coil can deviate from its axis and wobble off-axis, reducing the output sound quality. Currently, a metal positioning support is provided to prevent the voice coil from wobble off-axis. However, the structural stability of this vibrator is still not good enough, and the frequency of its low-frequency sound cannot be reduced. Summary of the Invention

[0003] In view of the above problems, the present invention provides a vehicle-mounted low-frequency vibrator and a car audio system, which have a low resonance frequency at the low frequency, thereby helping to create a better 4D effect in the car.

[0004] According to one aspect of the present invention, a vehicle-mounted low-frequency vibrator includes a bracket, a voice coil, and a magnetic circuit system, wherein the magnetic circuit system has a magnetic gap, the upper end of the voice coil is inserted into the magnetic gap, and the lower end of the voice coil is connected to the bracket;

[0005] The vehicle-mounted low-frequency vibrator further includes a first positioning support and a second positioning support, wherein the first positioning support and the second positioning support respectively include an outer connecting edge, an inner connecting edge, and a main body connected between the outer connecting edge and the inner connecting edge, and the main body is made of fabric;

[0006] At least a portion of the magnetic circuit system is located in the bracket, an outer connecting edge of the first positioning support is connected to the top of the bracket, and an inner connecting edge of the first positioning support is connected to the upper portion of the magnetic circuit system;

[0007] The second positioning support is located below the first positioning support, an outer connecting edge of the second positioning support is connected to the lower portion of the bracket, and an inner connecting edge of the second positioning support is connected to the lower portion of the magnetic circuit system.

[0008] In a preferred embodiment, the main body is flexible and can be woven from plant fibers or synthetic fibers.

[0009] In a preferred embodiment, the fabric is cotton, linen, silk, COMEX or a blended fabric.

[0010] In a preferred embodiment, the bracket includes a base plate for connecting to a car seat, a first flange and a second flange extending upward from the base plate, the first flange surrounding the periphery of the second flange, the first flange being higher than the second flange, the second flange surrounding the periphery of the magnetic circuit system and the voice coil, the outer connecting edge of the first positioning support piece being fixedly connected to the upper surface of the first flange, and the outer connecting edge of the second positioning support piece being fixedly connected to the upper surface of the second flange.

[0011] In a more preferred embodiment, the magnetic circuit system includes a magnetic conductive part, a magnetic steel arranged in the magnetic conductive part, and a front plate, the magnetic gap is formed between the inner surface of the magnetic conductive part and the outer surfaces of the magnetic steel and the front plate, the inner connecting edge of the first positioning support plate is connected to the upper surface of the magnetic conductive part, and the inner connecting edge of the second positioning support plate is connected to the lower surface of the magnetic conductive part.

[0012] In a further preferred embodiment, the magnetic conductive member has a bottom and a circle of side walls extending downward from the edge of the bottom, the magnetic steel and the front plate are arranged in the space surrounded by the side walls, the inner connecting edge of the first positioning support piece is connected to the upper surface of the bottom of the magnetic conductive member, and the inner connecting edge of the second positioning support piece is connected to the lower surface of the side wall of the magnetic conductive member.

[0013] In a more preferred embodiment, the middle portion of the bottom plate further has an upwardly extending boss, and the lower end portion of the voice coil is sleeved on the boss and fixedly connected to the side surface of the boss.

[0014] In a preferred embodiment, the bracket is provided with bolts or adhesive tape for connecting to the car seat.

[0015] In a preferred embodiment, the vehicle-mounted low-frequency vibrator further includes a wiring board, which is disposed in the bracket and connected to the leads of the voice coil.

[0016] According to a second aspect of the present invention, a car audio system includes the vehicle-mounted low-frequency vibrator as described above.

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

[0018] The vehicle-mounted low-frequency vibrator of the present invention uses two flexible positioning supports to connect the magnetic circuit system and the bracket. It has good structural stability and output sound quality. It prevents the voice coil from deviating from the axis and reduces the possibility of the voice coil shaking due to deviation from the axis. In particular, it can obtain a lower low-frequency resonance frequency (which can be as low as 60Hz). When it is applied to the car audio system, it cooperates with other speakers in the car to create a good 4D effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 Schematic diagram of an exploded view of a vehicle-mounted low-frequency vibrator according to embodiment 1 of the present invention.

[0021] Figure 2 FIG. 1 is a top view of a vehicle-mounted low-frequency vibrator according to embodiment 1 of the present invention.

[0022] Figure 3 for Figure 2 Cross-sectional view along the AA axis.

[0023] Figure 4 Schematic diagram of an exploded view of a vehicle-mounted low-frequency vibrator according to embodiment 2 of the present invention.

[0024] Figure 5 4 is a cross-sectional view of a vehicle-mounted low-frequency vibrator according to embodiment 2 of the present invention.

[0025] Figure 6 1 is a comparison diagram of the impedance curves of the speakers of Example 1 and the comparative example.

[0026] The reference numerals are as follows:

[0027] 1. Bracket; 10. Bottom plate; 11. First flange; 12. Second flange; 13. Boss;

[0028] 2. Voice coil;

[0029] 3. Magnetic circuit system; 30. Magnetic conductive element; 301. Bottom; 302. Side wall; 31. Magnetic steel; 32. Front plate;

[0030] 4. First positioning support; 41. External connecting edge; 42. Main body; 43. Internal connecting edge;

[0031] 5. Second positioning support; 51. External connecting edge; 52. Main body; 53. Internal connecting edge;

[0032] 6. Terminal block;

[0033] 71. Dust ring; 72. Adhesive tape;

[0034] 8. Bolts. DETAILED DESCRIPTION

[0035] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings to make the advantages and features of the present invention more easily understood by those skilled in the art. It should be noted that the description of these embodiments is intended to facilitate understanding of the present invention and does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0036] 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 the structure of automotive speakers by those skilled in the art and are not intended to limit the position of the speaker after installation in a vehicle. For example, the speaker can be mounted on an inclined or upright component within the vehicle, or on the lower surface of a component.

[0037] Example 1

[0038] This embodiment provides a vehicle-mounted low-frequency vibrator for use in a car audio system, and in conjunction with the system's tweeter and other speakers to create a 4D effect. The vehicle-mounted low-frequency vibrator is installed in a car seat, emitting low-frequency sound and outputting vibration.

[0039] Reference Figures 1 to 3 As shown, the vehicle-mounted low-frequency vibrator includes a bracket 1, a voice coil 2, and a magnetic circuit system 3. The magnetic circuit system 3 has a magnetic gap, the upper end of the voice coil 2 is inserted into the magnetic gap, and the lower end of the voice coil 2 is connected to the bracket 1. The voice coil 2 has a pair of positive and negative leads that can be powered. The vehicle-mounted low-frequency vibrator also includes a first positioning support 4 and a second positioning support 5. The first positioning support 4 includes an outer connecting edge 41, an inner connecting edge 43, and a main body 42 connected between the outer connecting edge 41 and the inner connecting edge 43. The second positioning support 5 includes an outer connecting edge 51, an inner connecting edge 53, and a main body 52 connected between the outer connecting edge 51 and the inner connecting edge 53. The main bodies 42 and 52 are made of fabric. The main bodies 42 and 52 are made of flexible fabric woven from plant fibers or synthetic fibers. Specifically, the main bodies 42 and 52 are cut from cloth (such as cotton, linen, silk screen, COMEX or blended fabrics, etc.), and do not use positioning supports woven from metal sheets or wires.

[0040] At least a portion of the magnetic circuit system 3 is located within the bracket 1. The outer connecting edge 41 of the first positioning support 4 is connected to the top of the bracket 1, and the inner connecting edge 43 of the first positioning support 4 is connected to the upper portion of the magnetic circuit system 3. In this embodiment, the entire magnetic circuit system 3 is located within the bracket 1, with its top aligned with the top of the bracket 1. The second positioning support 5 is located below the first positioning support 4. The outer connecting edge 51 of the second positioning support 5 is connected to the lower portion of the bracket 1, and the inner connecting edge 53 of the second positioning support 5 is connected to the lower portion of the magnetic circuit system 3.

[0041] Furthermore, the bracket 1 includes a base plate 10 for connecting to the car seat, a first flange 11 and a second flange 12 extending upward from the base plate 10. The first flange 11 surrounds the outer periphery of the second flange 12 and is higher than the second flange 12. The second flange 12 surrounds the outer periphery of the magnetic circuit system 3 and the voice coil 2. The outer connecting edge 41 of the first positioning support 4 is fixedly connected to the upper surface of the first flange 11, and the outer connecting edge 41 of the second positioning support 5 is fixedly connected to the upper surface of the second flange 12. From a top view, the first and second flanges 11 and 12 are annular and concentric with the voice coil 2 and the magnetic circuit system 3. The first and second positioning supports 4 and 5 are generally annular and concentric with the voice coil 2 and the magnetic circuit system 3. Specifically, the upper surface of the first flange 11 is bonded to the lower surface of the outer connecting edge 41 of the first positioning support 4, and the upper surface of the second flange 12 is bonded to the lower surface of the outer connecting edge 41 of the second positioning support 5.

[0042] The magnetic circuit system 3 includes a magnetic member 30, a magnetic steel 31 disposed within the magnetic member 30, and a front plate 32. A magnetic gap is formed between the inner surface of the magnetic member 30 and the outer surfaces of the magnetic steel 31 and the front plate 32. The inner connecting edge 43 of the first positioning support 4 is connected to the upper surface of the magnetic member 30, and the inner connecting edge 43 of the second positioning support 5 is connected to the lower surface of the magnetic member 30. Furthermore, the magnetic member 30 is bowl-shaped, such as a U-shaped iron. The magnetic member 30 has a bottom 301 and a circle of sidewalls 302 extending downward from the edge of the bottom 301. The magnetic steel 31 and the front plate 32 are disposed within the space enclosed by the sidewalls 302. The inner connecting edge 43 of the first positioning support 4 is connected to the upper surface of the bottom 301 of the magnetic member 30, and the inner connecting edge 43 of the second positioning support 5 is connected to the lower surface of the sidewalls 302 of the magnetic member 30. Specifically, the lower surface of the inner connecting edge 43 of the first positioning support 4 is bonded to the upper surface of the bottom plate 10 of the magnetic conductive member 30 , and the upper surface of the inner connecting edge 43 of the second positioning support 5 is bonded to the lower surface of the side wall 302 of the magnetic conductive member 30 .

[0043] The middle portion of the base plate 10 also has an upwardly extending boss 13. The lower end portion of the voice coil 2 is sleeved onto the boss 13 and fixedly connected to the side surface of the boss 13, for example, by gluing. The bracket 1 is provided with an assembly hole, which can be connected to the car seat via fasteners. Furthermore, the base plate 10 of the bracket 1 is provided with adhesive tape 72 to ensure a tight fit with the car seat. In addition, the base plate 10 of the bracket 1 is also provided with a dust ring 71. Furthermore, a terminal block 6 is embedded in the bracket 1. The positive and negative leads of the voice coil 2 are connected to the terminal block 6, which is then connected to the power amplifier through the terminal block 6 to provide power to the sound source.

[0044] The vehicle-mounted low-frequency vibrator of this embodiment uses two positioning supports, first and second, 5, to connect the magnetic circuit system 3 to the bracket 1. During operation, the vibrating magnetic circuit system 3 and voice coil 2 move simultaneously in the axial direction. This dual-support structure provides enhanced stability and greater adjustability in support material, braid count, and hardness, enabling better control of the exciter's performance parameters. Furthermore, the bracket 1 is secured with both double-sided tape and bolts for ease of installation.

[0045] Example 2

[0046] The difference between the embodiment 1 of this embodiment is that: Figure 4 and Figure 5 As shown, bolts 8 are provided on the bottom plate 10, and the bottom plate 10 is tightly connected to the car seat via the bolts 8. Other parts are basically the same as those in the first embodiment.

[0047] Comparative Example

[0048] The difference between the comparative example and Example 1 lies in the number and material of the positioning support pieces. Other aspects are the same as Example 1, that is, the U iron of the vehicle-mounted low-frequency vibrator in the comparative example is connected to the bracket via a steel positioning support piece.

[0049] The impedance curves of the vehicle-mounted low-frequency vibrator of Example 1 and the comparative example are respectively shown in FIG. Figure 6 The thinner curve is the impedance curve of the comparative low-frequency vibrator, and the thicker curve is the impedance curve of the vehicle-mounted low-frequency vibrator of Example 1. Comparison between the two: From the impedance curve, the resonance frequency of the comparative low-frequency vibrator is about 460Hz, while the resonance frequency of the vehicle-mounted low-frequency vibrator of Example 1 is no higher than 60Hz. It is obvious that Example 1 can achieve a lower low-frequency frequency, and the advantage is very obvious.

[0050] 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.

[0051] It is further understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar.

[0052] 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.

[0053] The above embodiment is only for illustrating the technical concept and features of the present invention and is a preferred embodiment. Its purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the scope of protection of the present invention.

Claims

1. A vehicle-mounted low-frequency vibrator comprising a bracket, a voice coil, and a magnetic circuit system, wherein the magnetic circuit system has a magnetic gap, the upper end of the voice coil is inserted into the magnetic gap, and the lower end of the voice coil is connected to the bracket; It is characterized in that The vehicle-mounted low-frequency vibrator further includes a first positioning support and a second positioning support, wherein the first positioning support and the second positioning support respectively include an outer connecting edge, an inner connecting edge, and a main body connected between the outer connecting edge and the inner connecting edge, and the main body is made of fabric; At least a portion of the magnetic circuit system is located in the bracket, an outer connecting edge of the first positioning support is connected to the top of the bracket, and an inner connecting edge of the first positioning support is connected to the upper portion of the magnetic circuit system; The second positioning support is located below the first positioning support, an outer connecting edge of the second positioning support is connected to the lower portion of the bracket, and an inner connecting edge of the second positioning support is connected to the lower portion of the magnetic circuit system.

2. The vehicle-mounted low-frequency vibrator according to claim 1, characterized in that: The main body is flexible.

3. The vehicle-mounted low-frequency vibrator according to claim 1 or 2, characterized in that: The fabric is cotton, linen, silk, COMEX or blended fabric.

4. The vehicle-mounted low-frequency vibrator according to claim 1, characterized in that: The bracket includes a base plate for connecting to a car seat, a first flange and a second flange extending upward from the base plate, the first flange surrounding the periphery of the second flange, the first flange being higher than the second flange, the second flange surrounding the periphery of the magnetic circuit system and the voice coil, the outer connecting edge of the first positioning support piece being fixedly connected to the upper surface of the first flange, and the outer connecting edge of the second positioning support piece being fixedly connected to the upper surface of the second flange.

5. The vehicle-mounted low-frequency vibrator according to claim 4, characterized in that: The magnetic circuit system includes a magnetic conductive part, a magnetic steel arranged in the magnetic conductive part, and a front plate. The magnetic gap is formed between the inner surface of the magnetic conductive part and the outer surfaces of the magnetic steel and the front plate. The inner connecting edge of the first positioning support is connected to the upper surface of the magnetic conductive part, and the inner connecting edge of the second positioning support is connected to the lower surface of the magnetic conductive part.

6. The vehicle-mounted low-frequency vibrator according to claim 5, characterized in that: The magnetic conductive member has a bottom and a circle of side walls extending downward from the edge of the bottom. The magnetic steel and the front plate are arranged in a space surrounded by the side walls. The inner connecting edge of the first positioning support is connected to the upper surface of the bottom of the magnetic conductive member, and the inner connecting edge of the second positioning support is connected to the lower surface of the side wall of the magnetic conductive member.

7. The vehicle-mounted low-frequency vibrator according to claim 4, characterized in that: The middle portion of the bottom plate is further provided with a boss extending upward, and the lower end portion of the voice coil is sleeved on the boss and fixedly connected to the side surface of the boss.

8. The vehicle-mounted low-frequency vibrator according to claim 1, characterized in that: The bracket is provided with bolts or adhesive tape for connecting with the car seat.

9. The vehicle-mounted low-frequency vibrator according to claim 1, characterized in that: The vehicle-mounted low-frequency vibrator further includes a wiring board, which is arranged in the bracket and connected to the lead of the voice coil.

10. A car audio system, characterized in that: The invention comprises the vehicle-mounted low-frequency vibrator according to any one of claims 1 to 8.

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