Automobile loudspeaker with balanced sound waves

Abstract

The invention discloses a sound wave balanced automobile loudspeaker which comprises an outer support, a U-shaped iron is installed at the axial first end of the outer support, a large voice diaphragm is arranged at the axial second end of the outer support, a first pole piece and a first permanent magnet are installed in the U-shaped iron, and a large voice coil is arranged between the first permanent magnet and the U-shaped iron in the axial direction. A magnetic cup is installed on the axial upper side of the permanent magnet, an inner support is embedded in the magnetic cup, a magnetic conductive ring is installed in the inner support, a second pole piece and a magnetic ring are installed on the inner side of the magnetic conductive ring, a second permanent magnet is installed on the upper side of the magnetic ring, a small voice coil covers the upper side of the second permanent magnet, and a small voice diaphragm is installed between the outer side of the small voice coil and the inner support. A sound wave equalizer located on the upper side of the small voice coil is installed in the middle of the large voice diaphragm. The problems that an existing automobile loudspeaker is difficult to give consideration to high and low frequency responses at the same time, low-frequency turbidity, high-frequency harsh or tone quality faults easily occur, and the broadband tone quality requirement cannot be met are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile loudspeakers, in particular to an automobile loudspeaker with balanced sound waves. BACKGROUND

[0002] As the core audio output component of the automobile audio-visual system, the sound quality performance of the automobile loudspeaker directly determines the auditory experience of the driver and passenger. With the increasing demand of consumers for comfort and entertainment in automobiles, high-quality automobile audio systems have become an important competitive point in automobile configuration, and the frequency response coverage, sound quality definition, sound field uniformity and structural stability of the loudspeaker are key indicators that affect the audio experience.

[0003] The existing automobile loudspeakers generally adopt the classic structure design of single diaphragm and single voice coil: the diaphragm is a vibration sound element, which is driven to vibrate by the electromagnetic driving force of the voice coil in the magnetic circuit, thereby converting the electrical signal into a sound wave signal. However, this structure has significant limitations: in order to adapt to the demand for medium and low frequency sound waves in the automobile cabin, the diaphragm is usually designed to be large in size, resulting in slow high-frequency vibration response and serious loss of high-frequency details; if a small-size diaphragm is used to improve high-frequency performance, the low-frequency depth will be sacrificed, resulting in problems such as low-frequency turbidity and insufficient power, ultimately limiting the frequency response range (usually only covering 100Hz-15kHz), and the high and low frequencies are not smooth, which easily produces "sound quality fault", and cannot restore the complete audio signal.

[0004] In addition, during the driving of the automobile, continuous bumps and vibrations (such as uneven road surface and engine vibration transmission) will occur, and the existing loudspeaker supports are mostly single plastic or metal frames, and the connection of the diaphragm, voice coil and magnetic circuit assembly only relies on simple buckles or adhesives. Long-term vibration can easily cause the components to loosen and displace, not only producing additional "strange sound" interference, but also accelerating the aging of the diaphragm, the disconnection of the voice coil and other faults, shortening the service life of the loudspeaker and affecting the sound quality stability during long-term use.

[0005] In summary, the existing automobile loudspeakers still have technical bottlenecks that are difficult to break through in terms of frequency response coverage, sound quality fidelity, in-cabin sound field uniformity and structural vibration resistance, and cannot meet the current consumer demand for high-quality and long-life automobile audio experience, and there is an urgent need for a automobile loudspeaker design scheme that can balance wide frequency response, low distortion, uniform sound field and high stability. SUMMARY

[0006] The present application provides an automobile loudspeaker with balanced sound waves, which can solve the problem that the existing automobile loudspeakers cannot simultaneously balance high and low frequency response, are prone to low frequency turbidity, high frequency harshness or sound quality fault, and cannot meet the wide frequency band sound quality demand.

[0007] In order to achieve the above object, the present application provides the following technical scheme: a sound wave equalizer automobile loudspeaker, comprising an outer support, the axial first end of the outer support is provided with a U-shaped iron, the axial second end of the outer support is provided with a large diaphragm, the inside of the U-shaped iron is provided with a first pole piece and a first permanent magnet, the first permanent magnet and the U-shaped iron are provided with a large voice coil along the axial direction, the upper side of the permanent magnet is provided with a magnetic cup, the inside of the magnetic cup is embedded with an inner support, the inside of the inner support is provided with a magnetic conductive ring, the inner side of the magnetic conductive ring is provided with a second pole piece and a magnetic ring, the upper side of the magnetic ring is provided with a second permanent magnet, the upper side of the second permanent magnet is covered with a small voice coil, the outer side of the small voice coil and the inner support are provided with a small diaphragm, the middle part of the large diaphragm is provided with a sound wave equalizer on the upper side of the small voice coil, the large diaphragm and the large voice coil are matched with the middle and low frequency, the small diaphragm and the small voice coil are matched with the high frequency, the frequency response range is expanded to 50Hz-20kHz, and the high and low frequency connection fault is solved. The sound wave equalizer in the middle part of the large diaphragm can correct the sound wave phase and amplitude in real time, the sound field intensity difference of different positions in the car is reduced, the uniform sound field of the whole cabin is realized, the double-layer structure of the outer support fixed U-shaped iron, the large diaphragm and the inner support embedded in the magnetic cup greatly improves the anti-vibration ability.

[0008] As a preferred, the sound wave equalizer comprises an outer ring and a tapered column located in the middle of the outer ring, the flow equalizing piece is arranged between the tapered column and the outer ring around the circumference, the flow equalizing piece as a whole is in the shape of a petal with two inclined sides, the outer ring is provided with a conical surface at the position connected with the flow equalizing piece, and the petal-shaped flow equalizing piece and the opposite inclined surface can divide the sound wave into multiple uniform sub-waves, reduce the turbulence phenomenon and increase the elimination rate of sound field "dead angle"; the conical surface of the outer ring can optimize the connection and transition of sound waves between the equalizer and the surrounding components, reduce the reflected noise and improve the purity of sound quality.

[0009] As a preferred, the inner support is provided with positioning bosses on the two radial sides, the side wall of the magnetic cup is provided with a hollow groove for positioning the positioning bosses, which can improve the assembly accuracy between the inner support and the magnetic cup, improve the assembly efficiency and reduce the vibration during use.

[0010] As a preferred, the positioning boss is provided with a conductive connecting piece passing through along the axial direction, the conductive connecting piece is electrically connected with the small voice coil, the conductive connecting piece is integrated with the positioning boss: the wire winding phenomenon is eliminated, the poor contact rate is reduced, and the conductivity reliability is improved.

[0011] As a preferred, the positioning boss is provided with a jack, the lower side of the outer ring is provided with a positioning column inserted into the jack, the lower side of the outer ring is further provided with at least two buckling plates, the upper edge of the inner support is provided with a buckling groove buckled with the buckling plate, and the positioning column, the jack, the buckling plate and the buckling groove form a double fixing, the looseness rate is reduced, and the installation efficiency of the sound wave equalizer is improved.

[0012] Preferably, a terminal block is installed on one side of the outer bracket. The terminal block is connected to the conductive connecting piece via a first connecting line, and the large diaphragm is connected to the terminal block via a second connecting line. The terminal block integrates two wiring paths, reducing the error rate, improving assembly integration, and facilitating wiring.

[0013] Preferably, the U-shaped iron, the first pole piece, and the first permanent magnet are all provided with a wire-passing hole in the middle for the first connecting wire to pass through. A wire-fixing seat is installed in the center of the bottom of the magnetic cup, and a wire-laying groove is provided at the bottom of the magnetic cup. After the first connecting wire passes through the wire-passing hole, it is guided and branched by the wire-fixing seat and extends along the wire-laying groove to the conductive connecting piece. The wire-passing hole, the wire-fixing seat, and the wire-laying groove are arranged in a standardized manner, which reduces the failure rate of wire wear, reduces magnetic field distribution interference, reduces wire displacement, and improves long-term reliability.

[0014] Preferably, the bottom surface of the magnetic cup is a downwardly convex cone shape, and the upper end of the first permanent magnet is provided with a conical groove that matches the magnetic cup. The combination of the conical bottom surface and the conical groove enhances the overall magnetic field strength of the magnetic circuit and reduces the magnetic field leakage rate.

[0015] Preferably, a spring is installed between the outer side of the large voice coil and the outer support, which helps to stabilize the vibration amplitude and improve stability.

[0016] Preferably, the upper surface of the large diaphragm is uniformly provided with reinforcing ribs in the circumferential direction. The reinforcing ribs can improve the tensile strength of the large diaphragm and reduce the local deformation.

[0017] Compared with the prior art, the beneficial effects of the present invention are: Employing a brand-new integrated structure, the large diaphragm and voice coil are suited for mid-low frequencies, while the small diaphragm and voice coil are suited for high frequencies, extending the frequency response range to 50Hz-20kHz and resolving the issue of gaps between high and low frequencies. The sound wave equalizer in the center of the large diaphragm can correct the phase and amplitude of sound waves in real time, reducing the difference in sound field intensity in different locations within the vehicle and achieving a uniform sound field throughout the cabin; the double-layer structure, with the outer bracket fixing the U-shaped iron and the large diaphragm, and the inner bracket embedding a magnetic cup, significantly improves the ability to resist bumps and vibrations. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a front sectional view of the present invention; Figure 3 This is a schematic diagram of a partial three-dimensional exploded state of the present invention; Figure 4 This is a partial three-dimensional structural diagram of the present invention; Figure 5 forFigure 4 Enlarged structural diagram at point A; Figure 6 This is a partial cross-sectional view of the present invention; Figure 7 This is a three-dimensional structural diagram of the acoustic equalizer of the present invention; Figure 8 This is a schematic diagram showing the usage state of the acoustic equalizer of the present invention.

[0019] Figure label: 1. Outer support; 11. Small diaphragm; 12. Magnetic cup; 121. Hollowed-out groove; 13. Second pole piece; 14. Second permanent magnet; 15. Sound wave equalizer; 151. Outer ring; 152. Conical column; 153. Equalizer; 154. Positioning column; 155. Buckle plate; 156. Inclined surface; 157. Conical surface; 16. Magnetic ring; 17. Inner support; 171. Positioning boss; 172. Buckle groove; 173. Insertion hole; 18. Wire hole; 19. Conductive connecting piece; 21. Terminal block; 22. Small voice coil; 23. First connecting wire; 3. Large diaphragm; 31. Reinforcing rib; 4. U-shaped iron; 5. First pole piece; 6. Wire fixing base; 7. First permanent magnet; 8. Large voice coil; 9. Spring; 10. Magnetic ring. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] To address the problem that existing car speakers struggle to simultaneously handle high and low frequency responses, often resulting in muddy low frequencies, harsh high frequencies, or sound quality gaps, thus failing to meet wideband sound quality requirements, such as... Figures 1-8 As shown, the present invention provides a sound wave equalization car speaker, including an outer bracket 1. A U-shaped iron 4 is mounted on the first axial end of the outer bracket 1, and a large diaphragm 3 is provided on the second axial end of the outer bracket 1. A first pole piece 5 and a first permanent magnet 7 are installed inside the U-shaped iron 4. A large voice coil 8 is arranged axially between the first permanent magnet 7 and the U-shaped iron 4. A magnetic cup 12 is mounted on the upper axial side of the first permanent magnet 7. An inner bracket 17 is embedded inside the magnetic cup 12. A magnetic guide ring 10 is installed inside the inner bracket 17. A second pole piece 13 and a magnetic ring 16 are mounted on the inner side of the magnetic guide ring 10. A second permanent magnet 14 is mounted on the upper side of the magnetic ring 16. A small voice coil 22 is covered on the upper side of the second permanent magnet 14. A small diaphragm 11 is installed between the outer side of the small voice coil 22 and the inner bracket 17. A sound wave equalizer 15 located on the upper side of the small voice coil 22 is installed in the middle of the large diaphragm 3.

[0022] In the technical solution of this embodiment, the large diaphragm 3 is adapted to the low and mid frequencies of 50Hz-2kHz, and the small diaphragm 11 is adapted to the high frequencies of 2kHz-20kHz. The overall frequency response range is extended to 50Hz-20kHz, which improves the low-frequency extension depth and the high-frequency upper limit compared with the traditional solution. The distortion rate is ≤3% in the 50Hz low-frequency band and the sensitivity is ≥85dB (1W / 1m) in the 20kHz high-frequency band.

[0023] Both the first permanent magnet 7 and the second permanent magnet 14 are made of neodymium iron boron material, forming a multi-layer magnetic circuit with the magnetic ring 16. Together with the magnetic ring 10 and the bipolar plate, the uniformity of the radial distribution of the magnetic field is improved, the fluctuation amplitude of the voice coil vibration driving force is reduced, and the distortion rate is ≤5% when the volume is high.

[0024] The sound equalizer 15 can correct sound wave phase deviation and amplitude difference in real time, reducing the sound field intensity difference between the driver, passenger and rear seats to ±3dB, achieving a uniform sound field with "no dead angles" throughout the cabin. The outer bracket 1 and the inner bracket 17 form a double-layer support, with the displacement of the component connection parts ≤0.05mm, extending the service life to 5-6 years.

[0025] In this embodiment, the acoustic equalizer 15 includes an outer ring 151 and a conical column 152 located in the middle of the outer ring 151. A flow equalizer 153 is circumferentially arranged between the conical column 152 and the outer ring 151. The flow equalizer 153 is generally petal-shaped with inclined surfaces 156 on both sides. A conical surface 157 is provided at the position where the outer ring 151 connects to the flow equalizer 153. The petal-shaped flow equalizer 153 and the relative inclined surfaces 156 design can split the sound wave into multiple uniform wavelets, reduce turbulence, and increase the elimination rate of sound field "dead zones". The conical surface 157 of ring 151 optimizes the transition of sound waves between the equalizer and surrounding components, reducing reflected noise and improving sound purity. Specifically, six petal-shaped equalizers 153, through a 30° inclined surface 156, split the sound waves into six uniform wavelets, reducing turbulence and improving the elimination rate of "dead zones" in the sound field. The 45° conical surface 157 connecting the outer ring 151 to the equalizers controls the sound wave reflection angle between 15° and 20°, preventing sound waves from directly impacting the inner support and small diaphragm, thus reducing the proportion of reflected noise and improving sound purity. The conical column 152 provides phase compensation for sound waves in the central area, reducing the phase deviation from the traditional ±10° to ±5°, ensuring phase synchronization of high and low frequency sound waves when superimposed in the sound field, and avoiding sound quality breaks caused by "phase cancellation". The entire sound equalizer 15 is injection molded from ABS resin.

[0026] In this embodiment, positioning bosses 171 are installed on both radial sides of the inner support 17, and hollow grooves 121 are provided on the side wall of the magnetic cup 12 for the positioning bosses 171 to be embedded and positioned. This can improve the assembly accuracy between the inner support 17 and the magnetic cup 12, not only improving assembly efficiency but also reducing vibration during use. The positioning bosses 171 and the hollow grooves 121 are fitted with H7 / f6 tolerance, resulting in small assembly deviation, improved magnetic circuit coaxiality, and avoid magnetic field unevenness caused by magnetic circuit offset.

[0027] In this embodiment, a conductive connecting piece 19 is provided along the axial direction on the positioning boss 171. The conductive connecting piece 19 is electrically connected to the small voice coil 22. The conductive connecting piece 19 integrates the positioning boss: the wire entanglement phenomenon is eliminated, the contact failure rate is reduced, and the conductivity reliability is improved. The conductive connecting piece 19 and the lead wire of the small voice coil 22 are connected by soldering.

[0028] In this embodiment, the positioning boss 171 is provided with a socket 173, the lower side of the outer ring 151 is provided with a positioning post 154 that is inserted into the socket 173, and the lower side of the outer ring 151 is also provided with at least two buckle plates 155. The upper edge of the inner bracket 17 is provided with a buckle groove 172 that engages with the buckle plate 155. The positioning post 154, the socket 173, the buckle plate 155 and the buckle groove 172 form a double fixation, which reduces the loosening rate and improves the installation efficiency of the acoustic equalizer 15. The positioning post 154 is inserted into the socket 173 to a depth of 4mm, and the two symmetrical buckle plates 155 are fastened into the buckle groove 172. Under the double fixation, the loosening rate of the equalizer is reduced.

[0029] In this embodiment, a terminal block 21 is installed on one side of the outer bracket 1. The terminal block 21 is connected to the conductive connecting piece 19 through the first connecting line 23. The large voice coil 3 is connected to the terminal block 21 through the second connecting line. The terminal block 21 integrates two wiring paths, reducing the error rate, improving the assembly integration, and facilitating wiring. Specifically, the terminal block 21 has two independent terminals, labeled "large voice coil" and "small voice coil" respectively, ensuring that the first connecting line and the second connecting line will not be connected incorrectly.

[0030] In this embodiment, the U-shaped iron 4, the first pole piece 5, and the first permanent magnet 7 are all provided with a wire hole 18 for the first connecting wire 23 to pass through. The bottom of the magnetic cup 12 is centrally mounted with a wire fixing seat 6, and the bottom of the magnetic cup 12 is provided with a wire laying groove. After the first connecting wire 23 passes through the wire hole 18, it is guided and branched by the wire fixing seat 6, and extends along the wire laying groove to the conductive connecting piece 19. The wire hole 18, the wire fixing seat 6, and the wire laying groove are properly routed, which reduces the failure rate of wire wear, reduces magnetic field distribution interference, reduces wire displacement, and improves long-term reliability.

[0031] In this embodiment, the bottom surface of the magnetic cup 12 is a downwardly convex cone shape, and the upper end of the first permanent magnet 7 is provided with a conical groove that matches the magnetic cup 12. The combination of the conical bottom surface and the conical groove enhances the overall magnetic field strength of the magnetic circuit and reduces the magnetic field leakage rate.

[0032] Meanwhile, a spring 9 is installed between the outer side of the large voice coil 8 and the outer support 1. The spring 9 assists in stabilization and improves the stability of the vibration amplitude. The upper surface of the large diaphragm 3 is uniformly provided with reinforcing ribs 31 around the circumference. The reinforcing ribs 31 can improve the tensile strength of the large diaphragm 3 and reduce the local deformation.

[0033] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0034] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly and specifically defined.

[0035] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

Claims

1. A car loudspeaker with equalized sound waves, comprising an outer bracket (1), characterized in that, The outer support (1) has a U-shaped iron (4) installed at its first axial end, and a large diaphragm (3) installed at its second axial end. A first pole piece (5) and a first permanent magnet (7) are installed inside the U-shaped iron (4). A large voice coil (8) is arranged axially between the first permanent magnet (7) and the U-shaped iron (4). A magnetic cup (12) is installed on the upper axial side of the first permanent magnet (7). An inner support (17) is embedded inside the magnetic cup (12). 17) has a magnetic ring (10) installed inside. A second pole piece (13) and a magnetic ring (16) are installed on the inner side of the magnetic ring (10). A second permanent magnet (14) is installed on the upper side of the magnetic ring (16). A small voice coil (22) is covered on the upper side of the second permanent magnet (14). A small diaphragm (11) is installed between the outer side of the small voice coil (22) and the inner support (17). A sound wave equalizer (15) located on the upper side of the small voice coil (22) is installed in the middle of the large diaphragm (3).

2. The car loudspeaker with sound wave equalization according to claim 1, characterized in that: The acoustic equalizer (15) includes an outer ring (151) and a conical column (152) located in the middle of the outer ring (151). A flow equalizer (153) is arranged circumferentially between the conical column (152) and the outer ring (151). The flow equalizer (153) is generally petal-shaped with inclined surfaces (156) on both sides. A conical surface (152) is provided at the position where the outer ring (151) and the flow equalizer (153) are connected.

3. The car loudspeaker with sound wave equalization according to claim 2, characterized in that: The inner support (17) is provided with positioning bosses (171) on both radial sides, and the magnetic cup (12) is provided with a hollow groove (121) for the positioning bosses (171) to be embedded and positioned.

4. The car loudspeaker with sound wave equalization according to claim 3, characterized in that: A conductive connecting piece (19) is provided along the axial direction on the positioning boss (171), and the conductive connecting piece (19) is electrically connected to the small voice coil (22).

5. The car loudspeaker with sound wave equalization according to claim 4, characterized in that: The positioning boss (171) is provided with a socket (173), the lower side of the outer ring (151) is provided with a positioning post (154) that is inserted into the socket (173), the lower side of the outer ring (151) is also provided with at least two buckle plates (155), and the upper edge of the inner bracket (17) is provided with a buckle groove (172) that engages with the buckle plate (155).

6. The car loudspeaker with sound wave equalization according to claim 4, characterized in that: A terminal block (21) is installed on one side of the outer bracket (1). The terminal block (21) is connected to the conductive connecting piece (19) through the first connecting line (23). The large sound diaphragm (3) is connected to the terminal block (21) through the second connecting line.

7. The car loudspeaker with sound wave equalization according to claim 6, characterized in that: The U-shaped iron (4), the first pole piece (5) and the first permanent magnet (7) are all provided with a wire hole (18) for the first connecting wire (23) to pass through. The magnetic cup (12) is centrally mounted with a wire fixing seat (6). The bottom of the magnetic cup (12) is provided with a wire laying groove. The first connecting wire (23) passes through the wire hole (18) and is guided and split by the wire fixing seat (6), and extends along the wire laying groove to the conductive connecting piece (19).

8. The car loudspeaker with sound wave equalization according to claim 1, characterized in that: The bottom surface of the magnetic cup (12) is a downwardly convex cone shape, and the upper end of the first permanent magnet (7) is provided with a conical groove that matches the magnetic cup (12).

9. The car loudspeaker with sound wave equalization according to claim 1, characterized in that: A spring (9) is installed between the outer side of the large voice coil (8) and the outer support (1).

10. The car loudspeaker with sound wave equalization according to claim 1, characterized in that: The upper surface of the large sound diaphragm (3) is uniformly provided with reinforcing ribs (31) around the circumference.

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