Anti-interference flat panel loudspeaker

Abstract

The utility model discloses a kind of anti-interference flat panel loudspeakers, including sound box, drive box, upper shielding plate, lower shielding plate and week shielding body.Several sounding holes are equipped in sound box side wall, top surface is equipped with upper shielding plate, its surface is provided with air hole, for balancing cavity air pressure and reducing low frequency distortion.Drive box is installed in sound box bottom, inside setting magnet, voice coil and diaphragm constitute electroacoustic conversion unit;Lower shielding plate is set in drive box lower surface, realize bottom electromagnetic shielding.Week shielding body is composed of floating plate and isolation layer ring, is sleeved in drive box periphery, for radial electromagnetic shielding and form suspension isolation structure, realize the floating support and mechanical vibration isolation of voice coil.The structure is through three-dimensional electromagnetic shielding and vibration isolation cooperation, significantly improve loudspeaker anti-interference performance and acoustic stability.

Description

Technical Field

[0001] This utility model relates to the field of loudspeaker technology, specifically to an anti-interference flat panel loudspeaker. Background Technology

[0002] Flat panel loudspeakers, as compact and uniform sound-producing devices, are widely used in devices such as televisions, smart speakers, laptops, and car audio systems. Most existing flat panel loudspeakers use a voice coil to drive the diaphragm, radiating sound waves through openings in the acoustic cavity and side walls to meet the design requirements of miniaturization and high sound quality. To improve anti-interference performance, some loudspeakers have metal shielding sheets or conductive layers coated on the circuit board or housing surface to weaken the influence of external electromagnetic fields on the voice coil and magnet.

[0003] However, existing flat panel loudspeakers still have the following problems in terms of electromagnetic shielding and mechanical interference immunity:

[0004] Existing loudspeaker shielding structures are mostly single-sided metal sheets or local conductive coatings, which can only block high-frequency electromagnetic interference within a limited range. They lack the ability to provide three-dimensional all-round shielding for the top, bottom and outer perimeter of the loudspeaker, which makes them prone to howling, noise or distortion in complex electromagnetic environments.

[0005] The mechanical support structure for voice coils and diaphragms is generally rigid or single-layer elastic. When vibrating at high frequencies, it is prone to eccentric oscillation and resonance problems, which may further introduce electromagnetic interference or lead to a decline in acoustic performance.

[0006] Existing loudspeakers generally lack a structure that effectively suppresses radial magnetic fields and mechanical vibrations. In particular, when multiple devices are working in parallel or when there is a high-intensity external magnetic field, their anti-interference performance is insufficient, making it difficult to meet the requirements of high-fidelity audio playback.

[0007] In summary, existing flat panel loudspeakers have significant shortcomings in electromagnetic interference protection and mechanical vibration isolation. There is an urgent need for an improved anti-interference flat panel loudspeaker that can achieve three-dimensional shielding of the upper and lower surfaces and the outer periphery, while also taking into account the floating support and vibration isolation functions of the voice coil. Utility Model Content

[0008] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0009] Therefore, the technical solution adopted by this utility model is as follows: an anti-interference flat panel loudspeaker, including a sound box, a driver box, an upper shielding plate, a lower shielding plate, and a peripheral shield. The sound box forms a sound-emitting cavity and vents sound waves through side sound holes; the upper and lower shielding plates are respectively arranged on the upper surface of the sound box and the bottom of the driver box to achieve electromagnetic shielding of the upper and lower surfaces of the loudspeaker; the peripheral shield adopts a stacked structure of floating plates and insulating rings, which is sleeved on the outer periphery of the driver box to achieve radial electromagnetic interference shielding and provide suspension vibration isolation function. The overall structure is compact, and through the synergy of three-dimensional shielding and flexible support structure, it achieves a comprehensive effect of electromagnetic interference suppression, vibration isolation, and high-fidelity output.

[0010] In a preferred embodiment, the anti-interference flat panel loudspeaker includes: a sound box with a plurality of sound-emitting holes evenly distributed on its sides, and an upper shielding plate fixedly mounted on its top surface, the upper shielding plate having at least one vent hole on its surface. The sound box forms the main sound-emitting cavity of the loudspeaker, the side sound-emitting holes can achieve directional sound wave guidance and effectively reduce shell resonance and breathing noise; the vent hole is used to balance the air pressure inside and outside the sound cavity, reduce low-frequency distortion, and improve low-frequency response quality.

[0011] In a preferred example, the driver box, mounted at the bottom of the sound box, contains a magnet, a voice coil, and a diaphragm arranged sequentially, forming the core electroacoustic conversion structure of the planar loudspeaker. During operation, the voice coil is driven by the magnetic field of the magnet to reciprocate, which in turn drives the diaphragm to generate sound waves.

[0012] In a preferred embodiment, a lower shielding plate is mounted on the lower surface of the driver housing to form electromagnetic shielding on the lower surface of the speaker. The lower shielding plate is preferably made of a conductive metal material, which can block the influence of ambient electromagnetic interference on the voice coil and magnet, thereby improving low-noise output capability.

[0013] In a preferred example, a peripheral shield, fitted around the outer periphery of the driver housing, includes a floating plate and an insulating ring, used to achieve radial electromagnetic shielding and mechanical vibration isolation for the loudspeaker. Gaps are left between the upper and lower surfaces of the floating plate and the bottom surface of the acoustic housing and the top surface of the lower shield, respectively, forming a suspended isolation structure that allows the voice coil to maintain stable floating support during high-frequency operation, avoiding eccentric vibration. The insulating ring is formed by laminating soft magnetic materials and damping composite materials, which can simultaneously suppress radial magnetic field interference and reduce mechanical vibration transmission.

[0014] In a preferred example, the surfaces of the upper and lower shielding plates can be coated with absorbing material to enhance the absorption of high-frequency stray electromagnetic waves and achieve a three-dimensional electromagnetic shielding effect; the diaphragm and voice coil are flexibly connected by a damping rubber ring, which is fixed to the inner wall of the sound box, further isolating high-frequency mechanical interference and reducing resonance distortion.

[0015] The upper shielding plate, lower shielding plate, and peripheral shielding body form a three-dimensional electromagnetic shielding system, which effectively suppresses the interference of external electromagnetic fields on the voice coil and diaphragm, and significantly improves the stability of the loudspeaker in complex electromagnetic environments.

[0016] Furthermore, the suspended isolation structure formed by the perimeter shield and the damping rubber ring keeps the voice coil in a floating support state, reduces the eccentric movement under high-frequency vibration, and achieves the dual functions of radial magnetic field shielding and mechanical vibration isolation through the isolation layer ring, ensuring the clarity and low distortion performance of the sound output.

[0017] Furthermore, the sound-emitting holes on the side wall of the sound box and the vent holes on the upper shielding plate not only optimize sound wave guidance and air circulation, but also improve low-frequency response and reduce shell resonance, thus achieving high-fidelity audio playback.

[0018] The beneficial effects achieved by this utility model are as follows:

[0019] 1. In this utility model, a three-dimensional electromagnetic shielding structure is formed by the upper shielding plate, the lower shielding plate, and the peripheral shielding body. The upper and lower shielding plates can be made of conductive metal and are combined with a wave-absorbing coating. The peripheral shielding body adopts a floating plate and isolation layer stacked structure, which not only achieves all-round electromagnetic interference shielding for the top, bottom and outer periphery of the speaker, but also absorbs high-frequency stray electromagnetic waves, thereby significantly improving the anti-interference performance of the speaker in complex electromagnetic environments.

[0020] 2. In this utility model, the peripheral shield and the damping rubber ring together form a suspended isolation and flexible support structure, which enables the voice coil to maintain stable floating support in high-frequency operation, reducing eccentric vibration and mechanical interference; the soft magnetic and damping composite stacked structure of the isolation layer ring further realizes the dual functions of radial magnetic field shielding and mechanical vibration isolation, thereby ensuring the clarity and low distortion effect of the diaphragm output sound. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model;

[0022] Figure 2 This is a cross-sectional structural diagram of one embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the cross-sectional structure of the lower shielding plate according to an embodiment of the present invention;

[0024] Figure 4 This is an exploded structural diagram of a shaft shield according to an embodiment of the present invention.

[0025] Figure label:

[0026] 100. Sound box; 110. Upper shielding plate; 120. Sound emission port; 111. Vent hole;

[0027] 200. Driver box; 210. Lower shielding plate; 220. Magnet; 230. Voice coil; 240. Diaphragm;

[0028] 300. Circumferential shield; 310. Floating plate; 320. Isolation ring. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0030] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of this invention.

[0031] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing an anti-interference flat panel speaker.

[0032] Combination Figures 1-4 As shown, the present invention provides an anti-interference flat panel speaker, comprising:

[0033] The sound box 100 has several sound-emitting holes 120 evenly distributed on its side to form directional sound wave guidance and reduce shell resonance; an upper shielding plate 110 is fixedly installed on the top surface of the sound box 100, and at least one vent hole 111 is opened on the surface of the upper shielding plate 110 to balance the air pressure inside and outside the cavity and reduce low-frequency distortion.

[0034] The driver box 200 is installed at the bottom of the sound box 100. Inside the driver box 200, a magnet 220, a voice coil 230 and a diaphragm 240 are arranged in sequence. The magnet 220 provides a stable magnetic field, and the voice coil 230 vibrates under the drive of current and drives the diaphragm 240 to produce sound.

[0035] The lower shielding plate 210 is fixedly installed on the lower surface of the driver box 200 to provide electromagnetic shielding for the bottom of the speaker and suppress electromagnetic interference signals from below.

[0036] A peripheral shield 300 is fitted onto the inner wall of the outer periphery of the drive box 200 to provide radial electromagnetic interference shielding for the outer periphery of the speaker. The peripheral shield 300 includes a floating plate 310 and an insulating ring 320. The floating plate 310 is suspended between the bottom of the sound box 100 and the lower shield 210. The insulating ring 320 adopts a laminated structure of soft magnetic material and damping composite material to simultaneously suppress radial magnetic field interference and isolate mechanical vibration transmission.

[0037] In this embodiment, the sound box 100 has multiple sound-emitting holes 120 on its sidewalls, and an upper shielding plate 110 is fixedly installed on its top surface. At least one vent hole 111 is opened on the surface of the upper shielding plate 110. The driver box 200 is fixedly installed at the bottom of the sound box 100. A magnet 220, a voice coil 230, and a diaphragm 240 are installed inside the driver box 200. A lower shielding plate 210 is fixed to the lower surface of the driver box 200 to form lower surface electromagnetic shielding. A peripheral shielding body 300 is fitted inside the driver box 200 and consists of a floating plate 310 and an insulating ring 320, providing radial electromagnetic interference shielding to the outer periphery of the speaker, achieving all-around anti-interference protection.

[0038] In this embodiment, both the upper shielding plate 110 and the lower shielding plate 210 are made of conductive metal materials, such as nickel-plated steel plates or aluminum alloys. To further enhance the absorption capability of high-frequency electromagnetic interference, their surfaces can be coated with a wave-absorbing material, such as a ferrite coating or a carbon-based conductive coating, thereby achieving effective absorption of high-frequency stray electromagnetic waves.

[0039] In this embodiment, the peripheral shield 300 is installed on the inner side of the outer periphery of the drive box 200. Its upper and lower surfaces are respectively separated from the bottom surface of the sound box 100 and the top surface of the lower shield 210, forming a suspended isolation structure. This allows the floating plate 310 to have a flexible buffer space under high-frequency vibration, which can both realize the floating support of the voice coil 230 and prevent the voice coil 230 from generating eccentric or unstable vibration under high-frequency vibration conditions.

[0040] In this embodiment, the isolation layer 320 is formed by laminating soft magnetic material and damping composite material, preferably with alternating layers of soft magnetic steel sheet and polymer damping adhesive. This structure shields the radial electromagnetic field through the soft magnetic material and achieves mechanical vibration isolation through the damping material, thereby reducing the interference of magnet 220 vibration on voice coil 230.

[0041] In this embodiment, multiple sound-emitting holes 120 on the sidewall of the sound box 100 are evenly distributed along the circumference, which allows sound waves to radiate outward uniformly and form a directional guiding effect. At the same time, the porous distribution structure can reduce the inherent resonance of the sound box 100, thereby improving the clarity and low distortion performance of the sound.

[0042] In this embodiment, the vent 111 is located at the center of the upper shielding plate 110, which can automatically balance the air pressure inside and outside the cavity during the operation of the speaker, reduce the air pressure difference generated by the movement of the low-frequency diaphragm 240, and thus effectively reduce low-frequency distortion and breathing noise.

[0043] In this embodiment, the diaphragm 240 and the voice coil 230 are flexibly connected by a damping rubber ring, which is fixed to the inner wall of the sound box 100. This flexible structure can effectively isolate mechanical vibration interference, allowing the diaphragm 240 to maintain stable operation during driving, preventing high-frequency vibrations from being transmitted to the voice coil 230, thereby ensuring stable sound output and low distortion.

[0044] Working principle and usage process of this utility model:

[0045] The upper shielding plate 110 and the lower shielding plate 210 are located at the top and bottom of the speaker, respectively, forming upper and lower surface shielding layers, which can effectively block the influence of external electromagnetic interference signals on the voice coil 230 and the driving circuit. The peripheral shielding body 300 is composed of a floating plate 310 and an isolation layer ring 320, which surrounds the outer periphery of the driver box 200 and forms radial shielding, so that external transverse electromagnetic interference is absorbed or attenuated. The isolation layer ring 320 adopts a design of soft magnetic material and damping composite material, which can suppress magnetic field interference and reduce vibration transmission.

[0046] When a current signal is input to the voice coil 230, the voice coil is driven to move up and down reciprocally under the action of the magnet 220, which in turn causes the diaphragm 240 to vibrate and generate sound waves. The sound waves are radiated outward through the sound holes 120 evenly distributed on the side wall of the sound box 100, which realizes directional sound wave guidance and reduces the impact of shell resonance on sound quality. The vent holes 111 on the upper shielding plate 110 can balance the internal and external air pressure, reduce low-frequency distortion and ensure smooth diaphragm movement.

[0047] A floating gap is reserved between the peripheral shield 300, the sound box 100, and the lower shield 210 to form a floating isolation structure, reducing the transmission of high-frequency vibrations to the voice coil 230; the damping rubber ring between the diaphragm 240 and the voice coil 230 further isolates mechanical vibrations, preventing the voice coil from becoming eccentric or jumping at high frequencies, and ensuring stable sound output.

[0048] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0049] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An anti-interference flat panel speaker, characterized in that, include: The sound box (100) has several sound holes (120) on its side and an upper shielding plate (110) fixedly installed on its top surface. The upper shielding plate (110) has at least one vent hole (111) on its surface. A driver box (200) is installed at the bottom of the sound box (100), and a magnet (220), a voice coil (230) and a diaphragm (240) are provided inside the driver box (200). A lower shielding plate (210) is disposed on the lower surface of the drive box (200) to form electromagnetic shielding on the lower surface of the speaker; A peripheral shield (300) is fitted inside the drive box (200). The peripheral shield (300) includes a floating plate (310) and an isolation ring (320) for providing radial electromagnetic interference shielding to the outer periphery of the speaker.

2. The anti-interference flat panel speaker according to claim 1, characterized in that, The upper shielding plate (110) and the lower shielding plate (210) are made of conductive metal materials, and their surfaces can be coated with wave-absorbing materials to enhance the absorption effect of high-frequency interference.

3. The anti-interference flat panel speaker according to claim 1, characterized in that, The upper and lower surfaces of the peripheral shield (300) are respectively separated from the bottom surface of the sound box (100) and the top surface of the lower shield (210) to form a floating isolation structure, which is used to realize the floating support of the voice coil (230) and avoid the voice coil (230) from generating eccentric vibration under high frequency vibration.

4. The anti-interference flat panel speaker according to claim 1, characterized in that, The isolation layer (320) is formed by stacking soft magnetic materials and damping composite materials to provide both radial magnetic field shielding and mechanical vibration isolation.

5. The anti-interference flat panel speaker according to claim 1, characterized in that, The sound box (100) has a plurality of sound-emitting holes (120) evenly distributed on its sidewalls to form directional sound wave guidance and reduce shell resonance.

6. The anti-interference flat panel speaker according to claim 1, characterized in that, The vent (111) is located at the center of the upper shield (110) to balance the air pressure inside and outside the speaker cavity and reduce low-frequency distortion.

7. The anti-interference flat panel speaker according to claim 1, characterized in that, The diaphragm (240) and the voice coil (230) are flexibly connected by a damping rubber ring, which is fixed to the inner wall of the sound box (100) to isolate mechanical vibration interference.

Images