Loudspeaker and vehicle

Abstract

The application discloses a loudspeaker and a vehicle. The loudspeaker comprises a basket, a magnetic circuit system and a vibration system, the magnetic circuit system and the vibration system are arranged on the basket, and the loudspeaker further comprises a counterweight system, the counterweight system comprises a counterweight unit, the counterweight unit comprises a counterweight block and an elastic connecting piece with elasticity, the counterweight block is arranged on the elastic connecting piece, and the elastic connecting piece is connected to the basket. The loudspeaker and the vehicle of the application realize low-frequency resonance cancellation with low cost and high reliability, improve the sound quality of the loudspeaker and the acoustic experience of the whole vehicle, and are compatible with the existing vehicle installation standard.

Description

Technical Field

[0001] This invention relates to a loudspeaker and a vehicle. Background Technology

[0002] Car speakers are loudspeakers installed in vehicles such as automobiles, producing sound through diaphragm vibration. Installed within the sheet metal structure of the vehicle, such as doors and dashboard, car speakers transmit axial vibrations through the speaker frame to the body sheet metal when playing low-frequency signals, causing sheet metal resonance and resulting in noise, sound coloration, and sound quality degradation. Several vibration damping solutions exist, such as rubber / foam pad isolation, active damping, and frame stiffening. Rubber / foam pad isolation weakens vibration transmission by adding a damping layer between the speaker and the sheet metal, but it is only effective for mid-to-high frequencies, with poor low-frequency resonance suppression and is prone to aging and failure. Active damping uses sensors to collect vibration signals and counteract them, but it is costly and has complex circuitry, making it difficult to promote in mass-produced speakers. Frame stiffening increases rigidity by thickening the frame or adding reinforcing ribs, but this increases weight and cannot fundamentally counteract low-frequency resonance energy.

[0003] The above traditional solutions have the following problems: (1) Insufficient suppression of low-frequency resonance, unable to specifically counteract the resonance of the speaker when it is working at low frequencies, the problem of resonance of the body sheet metal is not solved, and the sound quality experience is poor. (2) Active damping solutions are expensive, and passive vibration isolation solutions are not effective enough, and cannot balance low cost and high performance. (3) Rubber / foam vibration isolation components are easily affected by high and low temperatures inside the vehicle, resulting in hardening, aging, and failure, poor long-term reliability, and short service life. (4) Some damping structures require changes to the speaker mounting hole positions or body sheet metal structures, which cannot be compatible with the installation standards of existing mainstream models, resulting in poor installation adaptability.

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

[0005] This invention provides a speaker and vehicle that achieves low-cost, high-reliability low-frequency resonance cancellation, improves speaker sound quality and overall vehicle acoustic experience, while being compatible with existing vehicle installation standards.

[0006] The present invention adopts the following technical solution: A loudspeaker includes a frame, a magnetic circuit system, and a vibration system, wherein the magnetic circuit system and the vibration system are disposed on the frame. The loudspeaker also includes a counterweight system, wherein the counterweight system includes a counterweight unit, wherein the counterweight unit includes a counterweight block and an elastic connector, wherein the counterweight block is disposed on the elastic connector and the elastic connector is connected to the frame.

[0007] In some preferred embodiments, the elastic connector includes a spring sheet, which is a thin sheet with elasticity, and the spring sheet includes a mounting portion, on which the counterweight is fixed.

[0008] In some preferred embodiments, the spring includes an elastically deformable segment extending from the mounting portion in a direction away from the mounting portion to form a connecting end, the connecting end connecting to the frame or a free end configured for connecting to a speaker mounting base, the elastically deformable segment having one or more bends.

[0009] In some further preferred embodiments, the spring includes a first elastic deformation segment and a second elastic deformation segment, the first elastic deformation segment and the second elastic deformation segment being located on opposite sides of the counterweight and extending from the mounting portion in opposite directions to form opposite first connecting ends and second connecting ends.

[0010] In some further preferred embodiments, the spring is located on a plane perpendicular to the vibration axis of the speaker, the mounting portion has a pair of long sides and a pair of short sides, the connection between the long sides and the short sides forms a corner portion, the first elastic deformation segment extends from the first corner portion along a first direction parallel to the long side and then extends along a second direction parallel to the short side, the second elastic deformation segment extends from the second corner portion along the first direction and then extends along the second direction, and the first corner portion and the second corner portion are located at diagonal positions.

[0011] In some further preferred embodiments, the mounting portion has a mounting hole, and the counterweight is engaged in the mounting hole; the mounting hole is located between the long side and the short side. Further, the counterweight includes an insertion portion and a positioning flange, the positioning flange protruding from the top of the insertion portion outwards, the positioning portion being inserted into the mounting hole, and the positioning flange overlapping the portion of the mounting portion surrounding the mounting hole.

[0012] In some further preferred embodiments, a connection hole is provided on the first connection end and a connection hole is provided on the second connection end.

[0013] In some further preferred embodiments, the first connecting end and the second connecting end are connected to different parts of the basin stand.

[0014] In some alternative embodiments, the counterweight is affixed to the mounting portion or fixed to the mounting portion by fasteners.

[0015] In some preferred embodiments, the length-to-width ratio of the elastic deformation segment is greater than 2:1, and the stiffness of the spring sheet is... Satisfy the following formula: in, Let be the elastic modulus of the spring. The width of the elastically deformable segment. The thickness of the elastically deformable segment. It is the length of the elastically deformable segment or the sum of its lengths; The mass of the counterweight Satisfy the following formula: in, This is the low-frequency resonant peak frequency of the speaker.

[0016] In some preferred embodiments, the resilient connector has opposite first and second connecting ends, which are connected to different parts of the basin stand.

[0017] In some preferred embodiments, the basin stand includes an outer cylinder and an inner cylinder, the outer cylinder being disposed around the inner cylinder, the magnetic circuit system being disposed on the inner cylinder and suspended on the outer cylinder, the first connecting end of the elastic connector being connected to the outer cylinder, and the second connecting end of the elastic connector being connected to the inner cylinder.

[0018] In some further preferred embodiments, the vibration system includes a diaphragm having a front surface facing forward along the vibration axis of the loudspeaker and a rear surface opposite to the front surface, and a counterweight system disposed behind the diaphragm, the counterweights being opposite to and spaced apart from the diaphragm.

[0019] In some further preferred embodiments, the rear surface of the diaphragm and the outer cylinder enclose a rear cavity, the magnetic circuit system is located in the rear cavity, and part or all of the counterweight system is located in the rear cavity.

[0020] In some further preferred embodiments, the outer edge of the diaphragm is suspended on the front surface of the outer cylinder, the first connecting end is fixed on the rear surface of the outer cylinder, and the second connecting end is fixed on the rear surface of the inner cylinder.

[0021] In some further preferred embodiments, the inner cylinder has a rearwardly extending connecting post, and the second connecting end is fixed to the connecting post.

[0022] In some preferred embodiments, the elastic connector includes a metal sheet, a spring, or an elastic band; the counterweight includes a metal block, a ceramic block, or a plastic block. Further, a damping coating is provided on the surface of the counterweight.

[0023] In some preferred embodiments, the counterweight system includes a plurality of counterweight blocks, each of which is connected to the basin frame via a corresponding elastic connector, and the plurality of counterweight blocks are spaced apart along the circumferential direction of the basin frame.

[0024] In some preferred embodiments, the counterweight is cubic, cylindrical, or elliptical; the elastic connector is an integral spring sheet formed by cutting a metal sheet.

[0025] The present invention also adopts the following technical solution: A vehicle that includes the aforementioned speaker.

[0026] In some preferred embodiments, the speaker frame is fixed to a mounting plate on the vehicle, and the resilient connector is connected only to the frame or the resilient connector is connected between the frame and the mounting plate.

[0027] The present invention adopts the above solution, which has the following advantages compared with the prior art: The speaker of the present invention has a counterweight system on the frame. The weight of the counterweight generates inertial motion, which is opposite to the direction of the vibration transmitted from the vibration system to the frame. This reduces the low-frequency vibration transmitted from the frame to its mounting base (such as the sheet metal of a vehicle) through resonance cancellation, thereby achieving low-cost and high-reliability vibration reduction, improving the speaker's sound quality and the overall vehicle acoustic experience, while being compatible with existing vehicle installation standards. Attached Figure Description

[0028] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a perspective view of a loudspeaker according to Embodiment 1 of the present invention.

[0030] Figure 2 This is a rear view of a loudspeaker according to Embodiment 1 of the present invention.

[0031] Figure 3 for Figure 2 Sectional view along the AA direction.

[0032] Figure 4 This is a cross-sectional view of a counterweight unit according to Embodiment 1 of the present invention.

[0033] Figure 5 for Figure 4 Plan view of the counterweight unit.

[0034] Figure 6 This is a plan view of a spring sheet according to Embodiment 1 of the present invention.

[0035] Figure 7 This is a rear view of a loudspeaker according to Embodiment 2 of the present invention.

[0036] Figure 8 The vibration displacement curves are for the loudspeakers of Example 1 and the comparative example.

[0037] In the above attached figures, 100. Speaker; 1. Sink frame; 11. Outer cylinder; 12. Inner cylinder; 121. Connecting post; 13. Connecting strip; 2. Magnetic circuit system; 21. Magnetic cup; 22. Magnet; 23. Front panel; 3. Vibration system; 31. Diaphragm; 32. Voice coil; 4. Counterweight system; 40. Counterweight unit; 41. Spring piece; 410. Mounting part; 411. Long side; 412. Short side; 413. First corner part; 414. Second corner part; 42. Mounting hole; 431. First elastic deformation section; 432. First connecting end; 433. Second elastic deformation section; 434. Second connecting end; 44. Counterweight block; 441. Positioning flange. Detailed Implementation

[0038] 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.

[0039] In this article, "front" and "rear" are defined with reference to the vehicle. The direction in which the vehicle's front is considered front, and vice versa.

[0040] 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.

[0041] This embodiment relates to a speaker employing passive damping, particularly suitable for use in vehicles, to reduce vibrations transmitted from the speaker to the vehicle body. The embodiment also relates to a vehicle using this speaker, which can be mounted within structures such as door panels, dashboards, or seat headrests. Because vibrations transmitted from the speaker to the vehicle body are eliminated or reduced, low-frequency resonance is suppressed, preventing resonance in sheet metal and other structural components (serving as the speaker's mounting base / plate), thus solving the problems of noise, sound coloration, and sound quality degradation. In particular, this embodiment utilizes a combination of counterweights and elastic connectors to form a passive damping structure, mounted on a frame and located entirely within the speaker's rear cavity. This achieves low-cost, high-reliability low-frequency resonance cancellation, improving speaker sound quality and the overall vehicle acoustic experience, while remaining compatible with existing vehicle installation standards.

[0042] Example 1 Figures 1 to 3 An embodiment of a loudspeaker is shown. (Refer to...) Figures 1 to 3 As shown, the loudspeaker 100 includes a frame 1, a magnetic circuit system 2, and a vibration system 3, which are mounted on the frame 1. The magnetic circuit system 2 provides a magnetic field for electroacoustic conversion, and the vibration system 3 vibrates within this magnetic field based on the principle of electromagnetic induction, reproducing the desired sound. The loudspeaker 100 also includes a counterweight system 4, which includes a counterweight block 44 and an elastic connector. The counterweight block 44 is mounted on the elastic connector, which is connected to the frame 1. In this embodiment, the counterweight system 4 includes multiple counterweight units 40, which are spaced apart along the circumference of the frame 1. Each counterweight unit 40 includes a counterweight block 44 and an elastic connector. Each counterweight unit 40 extends substantially along the diameter of the frame 1.

[0043] Combination Figures 3 to 6 As shown, in this embodiment, the elastic connector includes a spring sheet 41. In other embodiments, the elastic connector includes a spring or an elastic band, such as a silicone band. The spring sheet 41 used in this embodiment is preferred, as it exhibits significant advantages in performance, damping adjustment, and assembly. The counterweight 44 includes a metal block, a ceramic block, or a plastic block. The counterweight 44 is cubic, cylindrical, or elliptical. The spring sheet 41 is a thin, elastic sheet, such as a copper sheet or an aluminum sheet. The spring sheet 41 is integrally formed from a thin copper plate or other metal plate, and is a single, integrated part. Preferably, the spring sheet 41 is a flat, sheet-like component located on a plane perpendicular to the vibration axis of the speaker 100, without bending along the vibration axis of the speaker 100. The elastic connector is a single, integrated spring sheet 41 formed by cutting a metal sheet of generally uniform thickness. When the speaker 100 operates, the spring sheet 41 can undergo elastic deformation along the vibration axis.

[0044] The spring piece 41 includes a mounting portion 410, and a counterweight 44 is fixed to the mounting portion 410. The mounting portion 410 can be located in the middle section of the spring piece 41. In this embodiment, the mounting portion 410 has a mounting hole 42, and the counterweight 44 is inserted into the mounting hole 42. Further, the counterweight 44 includes an insertion portion and a positioning flange 441. The positioning flange 441 protrudes from the top of the insertion portion outwards. The positioning portion is inserted into the mounting hole 42, and the positioning flange 441 overlaps the portion of the mounting portion 410 surrounding the mounting hole 42 to increase the connection strength between the counterweight 44 and the mounting portion 410 and prevent the counterweight 44 from dislodging from the mounting hole 42 when the counterweight unit 40 vibrates downwards. The positioning flange 441 surrounds the insertion portion along its circumference. The lower surface of the positioning flange 441 and the upper surface of the mounting portion 410 fit tightly against each other and can be a pair of mutually fitting planes. The counterweight 44 can be fixed to the mounting portion 410 by adhesive. In some other embodiments, the counterweight 44 can be fixed to the mounting portion 410 by fasteners.

[0045] The spring piece 41 includes an elastically deformable section that extends from the mounting portion 410 in a direction away from the mounting portion 410 to form a connecting end. This connecting end connects to the frame 1 or is configured as a free end for connecting to the speaker 100 mounting base. The elastically deformable section has one or more bends, forming one or more turning points to provide greater elasticity while meeting stiffness requirements. The elastically deformable section is a curved strip with a length-to-width ratio greater than 2:1, preferably greater than 5:1.

[0046] There are two elastic deformation segments, specifically a first elastic deformation segment 431 and a second elastic deformation segment 433. The first elastic deformation segment 431 and the second elastic deformation segment 433 are located on opposite sides of the counterweight 44 and extend from the mounting portion 410 in opposite directions to form opposite first connecting ends 432 and second connecting ends 434. Viewed along the vibration axis of the loudspeaker 100, the spring piece 41 is a centrally symmetrical shape.

[0047] Furthermore, the mounting portion 410 has a pair of long sides 411 and a pair of short sides 412, and the connection between the long sides 411 and the short sides 412 forms a corner portion. A first elastically deformable segment 431 extends from the first corner portion 413 along a first direction parallel to the long side 411 and then along a second direction parallel to the short side 412. A second elastically deformable segment 433 extends from the second corner portion 414 along the first direction and then along the second direction. The first corner portion 413 and the second corner portion 414 are located diagonally opposite each other. The first direction is... Figure 6 The left and right directions of the middle paper, the second direction is Figure 6 The vertical direction of the paper surface. Mounting hole 42 is located between the long side 411 and the short side 412.

[0048] In this embodiment, the first connecting end 432 and the second connecting end 434 are connected to different parts of the basin frame 1. The first connecting end 432 and the second connecting end 434 are provided with connecting holes. The first connecting end 432 and the second connecting end 434 can be locked to the bracket using screws or other fasteners. In some other embodiments, the first connecting end 432 is locked to the bracket using screws or other fasteners, and the second connecting end 434 is locked to the vehicle's sheet metal parts using screws or other fasteners.

[0049] stiffness of shrapnel 41 Satisfy the following formula: in, The elastic modulus of the spring piece 41 is... The width (average width) of the elastically deformable segment. The thickness (average thickness) of the elastically deformable segment. The length of the spring piece 41 is the sum of the lengths of the elastic deformation segments, that is, the length that can be elastically deformed, specifically the sum of the lengths of the first elastic deformation segment 431 and the second elastic deformation segment 433.

[0050] The mass of counterweight 44 Satisfy the following formula: in, This is the low-frequency resonant peak frequency of speaker 100. The unit is N / m. The unit is Hz. The unit is kg.

[0051] The elastic connector and the counterweight 44 constitute an inertial vibration damping system, and the natural frequency of the inertial vibration damping system satisfies the formula (in (where the natural frequency of the vibration reduction system is ), and the natural frequency of the vibration reduction system is . With the speaker's 100 low-frequency resonant peak frequency Equally, the counterweight 44 utilizes its reverse inertial motion to counteract the transmission of low-frequency vibrations from the speaker 100 to the vehicle body, achieving passive vibration reduction and suppressing sheet metal resonance. Multiple counterweight units 40 are symmetrically arranged circumferentially around the vibration axis of the speaker 100, with two or more units. The equivalent stiffness of the multiple counterweight units 40 connected in parallel satisfies... Equivalent quality meets ,in The number of counterweight units 40. The installation angle and preload of the elastic element can be matched according to the target resonant frequency of the loudspeaker 100 to ensure that the natural frequency of the counterweight system 4 matches the low-frequency operating frequency of the loudspeaker 100.

[0052] The mass and shape of the counterweight 44 are designed according to the target resonant frequency of the speaker 100. By adjusting the counterweight mass and the stiffness of the elastic element, the natural frequency of the damping system coincides with the low-frequency resonant frequency of the speaker 100, thus achieving resonance cancellation. A damping coating is provided on the outer surface of the counterweight 44 to further suppress high-frequency vibrations and prevent the counterweight 44 itself from generating abnormal noise.

[0053] In this embodiment, the opposite first connecting end 432 and second connecting end 434 of the elastic connector are connected to different parts of the basin frame 1, that is, the elastic connector is only connected to the basin frame 1.

[0054] The speaker frame 1 includes an outer cylinder 11 and an inner cylinder 12. The outer cylinder 11 surrounds the inner cylinder 12. The magnetic circuit system 2 is disposed on the inner cylinder 12 and suspended from the outer cylinder 11. The first connecting end 432 of the elastic connector is connected to the outer cylinder 11, and the second connecting end 434 of the elastic connector is connected to the inner cylinder 12. The outer cylinder 11 of the speaker frame 1 is provided with standard mounting holes 42, which can be directly adapted to the mounting positions of the speaker 100 in existing vehicle models without modifying the body sheet metal structure. The outer cylinder 11 and the inner cylinder 12 are spaced apart and connected by multiple spaced connecting strips 13. The aforementioned counterweight system 4 is disposed in the space between the outer cylinder 11 and the inner cylinder 12 and does not occupy the internal space of the magnetic circuit system 2.

[0055] The vibration system 3 includes a diaphragm 31 and a voice coil 32. The diaphragm 31 has a front surface facing forward along the vibration axis of the loudspeaker 100 and a rear surface opposite to the front surface. The magnetic circuit system 2 is disposed behind the diaphragm 31, and the voice coil 32 is connected to the diaphragm 31 and inserted rearward into the magnetic gap of the magnetic circuit system 2. The magnetic circuit system 2 specifically includes a magnetic cup 21, a magnet 22, and a front plate 23. The magnetic cup 21 has a cavity, and the magnet 22 and the front plate 23 are stacked inside the magnetic cup 21. The magnetic gap is formed between the inner surface of the magnet 22 and the outer surface of the magnet 22 and / or the front plate 23.

[0056] The counterweight system 4 is located behind the diaphragm 31, with counterweight blocks 44 and diaphragm 31 positioned opposite each other and spaced apart. The rear surface of the diaphragm 31 and the outer cylinder 11 enclose a rear cavity, in which the magnetic circuit system 2 is located, and part or all of the counterweight system 4 is located. The outer edge of the diaphragm 31 is suspended from the front surface of the outer cylinder 11, and the first connecting end 432 is fixed to the rear surface of the outer cylinder 11; the second connecting end 434 is fixed to the rear surface of the inner cylinder 12. The inner cylinder 12 has a rearwardly extending connecting post 121, and the second connecting end 434 is fixed to the connecting post 121. The rear surface of the outer cylinder 11 is provided with multiple evenly distributed mounting bases, each with elastic element mounting holes 42 (for the first connecting end 432 to connect), integrally formed with the main body of the frame 1 to ensure structural strength and installation coaxiality.

[0057] Viewed along the vibration axis of the loudspeaker 100, the magnetic circuit system 2 is fixed to the center of the frame 1, and the counterweight units 40 are distributed around the magnetic circuit system 2, all located on the outside of the magnetic system, so as not to affect the uniformity of the magnetic gap of the magnetic circuit system 2 or the acoustic performance of the loudspeaker 100. A gap is reserved between the counterweight unit 40 and the magnetic circuit assembly to avoid interference between the counterweight block 44 and the magnetic circuit assembly when the counterweight block 44 moves, and to ensure the movement space of the counterweight unit 40.

[0058] In this embodiment, the speaker frame 1 of the speaker 100 is fixed to the vehicle's mounting plate, and the elastic connector is only connected to the frame 1. The counterweight 44 is suspended from the back of the frame 1 by the elastic connector, located in the space between the frame 1 and the magnetic circuit assembly, without occupying additional installation space.

[0059] In this embodiment, multiple counterweight units 40 are arranged at equal intervals along the perimeter of the basin frame 1, and are centrally symmetrically distributed. The elastic coefficients of each spring piece 41 are consistent, ensuring that the shock absorption system is subjected to uniform force and avoiding eccentric vibration.

[0060] The working principle of speaker 100 is as follows: When the speaker 100 plays a low-frequency signal, the diaphragm 31 and the frame 1 will vibrate axially at low frequencies. The vibration energy will be transferred to the body sheet metal through the frame 1, causing resonance. At this time, the counterweight system 4 will generate inertial motion in the opposite direction to the vibration of the frame 1. When the basin frame 1 vibrates forward with the diaphragm 31, the counterweight 44, due to inertial lag, counteracts the forward vibration of the basin frame 1 through the reverse tension of the elastic connector; when the basin frame 1 vibrates backward, the inertial force of the counterweight 44 will push the basin frame 1 to move in the opposite direction, counteracting the backward vibration energy. Since the natural frequency of the counterweight system 4 matches the low-frequency resonant frequency of the speaker 100, the low-frequency vibration transmitted to the body sheet metal can be greatly reduced through resonance cancellation. At the same time, the symmetrically distributed structure ensures the uniformity of the damping effect.

[0061] Example 2 Figure 7 Another embodiment of the speaker 100 is shown. In this embodiment, the first connecting end 432 of the spring 41 is connected to the bracket, and the second connecting end 434 is a free end, not connected to other components of the speaker 100. When the speaker 100 is to be assembled into a vehicle, the second connecting end 434 is connected to the speaker 100 mounting plate of the vehicle. That is, the elastic connector is connected between the frame 1 and the mounting plate.

[0062] Comparative Example The only difference between the comparative loudspeaker 100 and Example 1 is that it does not include the counterweight system 4. Everything else is the same as Example 1.

[0063] Performance testing The displacement of the frame 1 of the two loudspeakers 100 of Example 1 and the comparative example was tested under the same signal excitation. (Refer to...) Figure 8 The displacement curves shown are as follows: the blue curve is the displacement curve of the speaker frame in the comparative example, and the black curve is the displacement curve of the speaker frame in Example 1. At around 70Hz (the frequency point of low-frequency resonance), the vibration displacement of the comparative example is 0.196mm, and the vibration displacement of Example 1 is 0.053mm. The difference between the two is close to 3.7 times, and the vibration reduction effect of Example 1 is obvious.

[0064] The speaker 100 of the embodiment has the following advantages: 1. Symmetrically distributed elastic connectors and counterweights 44 are integrated on the back of the speaker 100 frame 1. Low-frequency vibration is suppressed by resonance cancellation, which is different from the traditional vibration isolation / hardening solution and greatly improves the vibration reduction efficiency.

[0065] 2. Passive vibration reduction is achieved by adopting a purely mechanical structure, which requires no additional circuits or sensors, resulting in low cost and no aging issues of electronic components, thus greatly improving reliability.

[0066] 3. The counterweight system 4 is integrated into the back of the speaker frame 1. It does not change the external mounting dimensions and hole positions of the speaker 100, and can be directly compatible with the mounting standards of existing vehicle models without modifying the vehicle body structure.

[0067] 4. The stiffness of the elastic connector and the mass of the counterweight 44 can be customized according to different sizes and resonant frequencies of the speaker 100, adapting to various types of speakers 100 such as mid-bass and bass speakers.

[0068] 5. The counterweight system 4 is arranged in the space between the frame 1 and the magnetic circuit, without increasing the overall thickness and radial dimension of the speaker 100, making it suitable for compact installation spaces such as car doors.

[0069] 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.

[0070] It can be further understood that in this disclosure, "multiple" refers to two or more, and other quantifiers are similar.

[0071] 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.

[0072] The above embodiments are only for illustrating the technical concept and features of the present invention, and are preferred embodiments. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the scope of protection of the present invention.

Claims

1. A speaker comprising a basket, a magnetic circuit system, and a vibration system, the magnetic circuit system and the vibration system being provided on the basket, characterized by, The speaker also includes a counterweight system, which includes a counterweight unit. The counterweight unit includes a counterweight block and a resilient connector. The counterweight block is disposed on the resilient connector, and the resilient connector is connected to the speaker frame. The elastic connector includes a spring sheet, which is a thin sheet with elasticity. The spring sheet includes a mounting portion and a first elastic deformation segment and a second elastic deformation segment. The first elastic deformation segment and the second elastic deformation segment are located on opposite sides of the counterweight and extend from the mounting portion in opposite directions to form opposite first connecting ends and second connecting ends. The spring is located on a plane perpendicular to the vibration axis of the speaker. The mounting part has a pair of long sides and a pair of short sides. The mounting part has a mounting hole, and the counterweight is inserted into the mounting hole. The mounting hole is located between the long side and the short side. The counterweight includes an insertion part and a positioning flange. The positioning flange protrudes from the top of the insertion part toward the surrounding area. The insertion part is inserted into the mounting hole, and the positioning flange overlaps the part of the mounting part surrounding the mounting hole.

2. The loudspeaker of claim 1, wherein, The connection between the long side and the short side forms a corner. The first elastic deformation segment extends from the first corner along a first direction parallel to the long side and then along a second direction parallel to the short side. The second elastic deformation segment extends from the second corner along the first direction and then along the second direction. The first corner and the second corner are located at diagonal positions.

3. The loudspeaker of claim 1, wherein, A connection hole is provided on the first connecting end, and a connection hole is provided on the second connecting end; the first connecting end and the second connecting end are connected to different parts of the basin frame.

4. The loudspeaker according to any one of claims 1 to 3, characterized in that, The ratio of the length and the width of the elastic deformation section is greater than 2:1, the stiffness of the elastic sheet satisfies the following equation: ； wherein E is the modulus of elasticity of the spring, W is the width of the elastic deformation section, T is the thickness of the elastic deformation section, L is the length or the sum of the lengths of the elastic deformation section; The mass of the counterweight Satisfy the following formula: ； in, This is the low-frequency resonant peak frequency of the speaker.

5. The loudspeaker according to any one of claims 1 to 3, characterized in that, The elastic connector has opposite first and second connecting ends, which are connected to different parts of the basin stand.

6. The loudspeaker according to claim 5, characterized in that, The basin stand includes an outer cylinder and an inner cylinder. The outer cylinder is arranged around the inner cylinder. The magnetic circuit system is arranged on the inner cylinder and suspended on the outer cylinder. The first connecting end of the elastic connector is connected to the outer cylinder, and the second connecting end of the elastic connector is connected to the inner cylinder.

7. The loudspeaker according to claim 6, characterized in that, The vibration system includes a diaphragm having a front surface facing forward along the vibration axis of the loudspeaker and a rear surface opposite to the front surface. The counterweight system is disposed behind the diaphragm, with the counterweights and the diaphragm being opposite to and spaced apart.

8. The loudspeaker according to claim 7, characterized in that, The rear surface of the diaphragm and the outer cylinder enclose a rear cavity, the magnetic circuit system is located in the rear cavity, and part or all of the counterweight system is located in the rear cavity.

9. The loudspeaker according to claim 7, characterized in that, The outer edge of the diaphragm is suspended on the front surface of the outer cylinder, and the first connecting end is fixed on the rear surface of the outer cylinder; the second connecting end is fixed on the rear surface of the inner cylinder.

10. The loudspeaker according to claim 9, characterized in that, The inner cylinder has a rearwardly extending connecting post, and the second connecting end is fixed to the connecting post.

11. The loudspeaker according to claim 1, characterized in that, The elastic connector includes a metal sheet, a spring, or an elastic band; the counterweight includes a metal block, a ceramic block, or a plastic block; and a damping coating is provided on the surface of the counterweight.

12. The loudspeaker according to any one of claims 1 to 3, characterized in that, The counterweight system includes a plurality of counterweight units, which are spaced apart along the perimeter of the basin frame.

13. The loudspeaker according to any one of claims 1 to 3, characterized in that, The counterweight is cubic, cylindrical, or elliptical; the elastic connector is an integral spring sheet formed by cutting a metal sheet.

14. A vehicle, characterized in that, Includes the loudspeaker as described in any one of claims 1 to 13.

15. The vehicle according to claim 14, characterized in that, The speaker frame is fixed to the vehicle mounting plate, and the elastic connector is connected only to the frame or the elastic connector is connected between the frame and the mounting plate.

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