High-sensitivity anti-interference miniature waterproof loudspeaker
By employing an efficient magnetic circuit composed of an inner magnetic column, a main magnetic ring, and an outer magnetic cup, along with a waterproof design, the problem of waterproofing and anti-interference for miniature loudspeakers in complex electromagnetic environments has been solved. This has resulted in improved sensitivity and waterproofing performance, ensuring the stability and acoustic performance of the loudspeaker in complex environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-29
- Publication Date
- 2026-04-07
AI Technical Summary
Existing miniature loudspeakers have poor waterproof performance and lack electromagnetic interference resistance in complex electromagnetic environments, resulting in a deteriorated signal-to-noise ratio and failing to meet the comprehensive performance requirements of miniaturized devices.
It adopts an inner magnetic column, a main magnetic ring, and an outer magnetic cup to form a high-efficiency magnetic circuit, and a reverse magnetic ring to cancel out external stray magnetic fields. It achieves waterproof function through a sealed shell and a polytetrafluoroethylene film, and combines a hydrophobic coating and porous sound-absorbing silicone to improve acoustic performance and protective performance.
It achieves high sensitivity and waterproof performance of the speaker in complex environments, cancels external magnetic interference, ensures internal and external pressure balance, and improves signal-to-noise ratio and waterproof reliability.
Smart Images
Figure CN121815169A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of loudspeakers, and in particular to a highly sensitive, interference-resistant, miniature, waterproof loudspeaker. Background Technology
[0002] Miniature loudspeakers are increasingly used in portable electronic devices, but with the miniaturization and functional integration of these devices, the performance limitations of traditional loudspeakers in complex environments are becoming increasingly apparent. Currently, most mainstream miniature loudspeakers on the market employ dynamic or balanced armature structures, whose sensitivity is limited by magnetic circuit design and diaphragm materials. Furthermore, they generally lack comprehensive protection against electromagnetic interference and liquid penetration; that is, existing miniature loudspeakers have weak waterproof performance and lack electromagnetic interference resistance, leading to a deterioration in signal-to-noise ratio in complex electromagnetic environments. While some manufacturers have achieved single-function improvements in recent years through external waterproof membranes or shielding layers, the overall technical bottleneck of mutual constraint between acoustic performance and protective performance remains. Therefore, this invention proposes a highly sensitive, interference-resistant, miniature waterproof loudspeaker. Summary of the Invention
[0003] To achieve the above objectives, the present invention provides the following technical solution: a high-sensitivity, anti-interference, miniature waterproof loudspeaker, comprising a sealed housing, a supporting frame disposed at the center of the inner side of the sealed housing, a stainless steel shell fixed to the outer side of the supporting frame, a voice coil ring seat fitted to the lower end of the supporting frame and inside the stainless steel shell, a titanium alloy diaphragm fixed to the inner side of the voice coil ring seat, a ceramic diaphragm fixed to the inner side of the titanium alloy diaphragm, the voice coil ring seat, the titanium alloy diaphragm, and the ceramic diaphragm being integrally formed, an inner magnetic post disposed at the center of the bottom end of the voice coil ring seat, a main magnetic ring fitted to the outer side of the inner magnetic post, an outer magnetic cup fitted to the outer side of the main magnetic ring, the upper end of the outer magnetic cup fitted to the stainless steel shell, a reverse magnetic ring fitted to the outer side of the outer magnetic cup, a sound guide seat disposed at the upper end of the ceramic diaphragm, the sound guide seat being fixed to the supporting frame, a sound output array hole being opened inside the upper end of the sound guide seat, and a polytetrafluoroethylene film being disposed at the upper end of the sound output array hole.
[0004] Preferably, a silicone suspension edge is installed on the inner side of the upper end of the voice coil seat and on the outer side of the titanium alloy diaphragm, and a first porous sound-absorbing silicone is filled on the inner side of the lower end of the voice coil seat and on the upper end of the main magnetic ring.
[0005] Preferably, a thermosensitive soft magnetic alloy patch is attached to the center of the bottom of the outer magnetic cup, a waterproof seat is fixed to the upper end of the sound guide seat and outside the sound array hole, the upper end of the waterproof seat extends to the upper end of the sealed shell, and the polytetrafluoroethylene film is located inside the upper end of the waterproof seat and fixed to the waterproof seat.
[0006] Preferably, a heat-conducting plate is fixed inside the sealed housing and at the lower end of the thermosensitive soft magnetic alloy patch. A receiving groove is formed inside the upper end of the heat-conducting plate, and the thermosensitive soft magnetic alloy patch is located inside the receiving groove and is attached to the receiving groove.
[0007] Preferably, a hydrophobic coating is attached and fixed to the inner side of the waterproof seat, between the upper end of the polytetrafluoroethylene film and the upper end of the sound array hole.
[0008] Preferably, a resonator is fixed to the outside of the stainless steel shell, the upper end of the resonator is fitted to the sealed shell, and a resonant cavity is formed inside the resonator and located on the outside of the stainless steel shell. The inner side of the resonant cavity is filled with a second porous sound-absorbing silicone.
[0009] Preferably, the bottom end of the sealed housing is symmetrically fixed with snap-fit guide rails, and both sides of the sealed housing are fixed with wire fasteners, which are symmetrically arranged between each other. Multiple flow guide fins are equidistantly fixed at the upper end of the sealed housing and on the outside of the polytetrafluoroethylene film.
[0010] Preferably, an interface module is fixedly connected to one end of the sealed housing.
[0011] Preferably, a centering support plate is fixed at the upper end of the supporting frame and inside the stainless steel shell.
[0012] In summary, the present invention provides a highly sensitive, anti-interference, miniature waterproof loudspeaker with the following advantages: 1. This high-sensitivity, anti-interference miniature waterproof loudspeaker uses an inner magnetic column, a main magnetic ring, and an outer magnetic cup to form an efficient magnetic circuit, which locks and concentrates the magnetic field within the inner range of the voice coil ring seat, effectively improving sensitivity. At the same time, the magnetic field generated by the reverse magnetic ring is opposite to that of the main magnetic ring, which can cancel and shield external stray magnetic fields, thus achieving an anti-interference effect.
[0013] 2. This highly sensitive, anti-interference, miniature waterproof loudspeaker achieves a sealed and waterproof function on the outside of the loudspeaker through a sealed shell, a polytetrafluoroethylene film, and a hydrophobic coating. Furthermore, the polytetrafluoroethylene film can isolate liquid water while allowing air to circulate freely, thereby ensuring pressure balance between the inside and outside of the loudspeaker. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of one end of the sealed housing of the present invention; Figure 3 This is a schematic diagram of the structure inside the sealed housing of the present invention; Figure 4 This is a schematic diagram of the lower end structure of the stainless steel outer shell of the present invention; Figure 5 This is a schematic diagram of the outer structure of the load-bearing frame of the present invention; Figure 6 This is a schematic diagram of the inner structure of the voice coil ring seat of the present invention; Figure 7 This is a schematic diagram of the lower end structure of the voice coil ring seat of the present invention; Figure 8 This is a schematic diagram of the outer structure of the inner magnetic column of the present invention; Figure 9 This is a schematic diagram of the inner structure of the resonator of the present invention.
[0015] Explanation of reference numerals in the attached figures: 1. Sealed shell; 2. Support frame; 3. Stainless steel shell; 4. Centering support; 5. Voice coil ring mount; 6. Titanium alloy diaphragm; 7. Ceramic diaphragm; 8. Silicone suspension edge; 9. First porous sound-absorbing silicone; 10. Inner magnetic column; 11. Main magnetic ring; 12. Outer magnetic cup; 13. Reverse magnetic ring; 14. Thermosensitive soft magnetic alloy patch; 15. Sound guide; 16. Sound output array hole; 17. Waterproof base; 18. PTFE film; 19. Hydrophobic coating; 20. Resonator; 21. Resonance cavity; 22. Second porous sound-absorbing silicone; 23. Snap-on guide rail; 24. Cable tie; 25. Heat conduction plate; 26. Receiving groove; 27. Air guide fins; 28. Interface module. Detailed Implementation
[0016] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings.
[0017] Please see Figure 1-9 A highly sensitive, anti-interference, miniature waterproof loudspeaker includes a sealed housing 1, a support frame 2 located at the center of the inner side of the sealed housing 1, a stainless steel shell 3 fixed to the outer side of the support frame 2, a centering support plate 4 fixed to the upper end of the support frame 2 and located inside the stainless steel shell 3, a voice coil ring seat 5 fitted to the lower end of the support frame 2 and located inside the stainless steel shell 3, a titanium alloy diaphragm 6 fixed to the inner side of the voice coil ring seat 5, a ceramic diaphragm 7 fixed to the inner side of the titanium alloy diaphragm 6, and the voice coil ring seat 5, titanium alloy diaphragm 6, and ceramic diaphragm 7 are integrally formed. The titanium alloy diaphragm 6, combined with the ceramic diaphragm 7, can efficiently transmit low and high frequencies. Meanwhile, a silicone suspension edge 8 is installed on the inner side of the upper end of the voice coil ring seat 5 and on the outer side of the titanium alloy diaphragm 6. The silicone suspension edge 8 provides a large stroke by combining its own damping characteristics, thereby suppressing split vibration. The inner side of the lower end of the voice coil ring seat 5 and the upper end of the main magnetic ring 11 is filled with a first porous sound-absorbing silicone 9. The first porous sound-absorbing silicone 9 absorbs the rear sound waves of the titanium alloy diaphragm 6 and the ceramic diaphragm 7, prevents the front and rear sound waves from canceling each other out, improves the low frequency effect, and balances the pressure inside the voice coil ring seat 5. In order to counteract and shield external stray magnetic fields and achieve anti-interference effect, an inner magnetic post 10 is installed at the center of the bottom end of the voice coil seat 5. A main magnetic ring 11 is attached to the outside of the inner magnetic post 10, and an outer magnetic cup 12 is attached to the outside of the main magnetic ring 11. The upper end of the outer magnetic cup 12 is attached to the stainless steel shell 3, and a reverse magnetic ring 13 is attached to the outside of the outer magnetic cup 12. The reverse magnetic ring 13 can generate a magnetic field opposite to that of the main magnetic ring 11, which can greatly counteract external stray magnetic fields. In order to make the speaker sensitivity more stable under different temperatures, a thermosensitive soft magnetic alloy patch 14 is attached to the center of the bottom of the outer magnetic cup 12. Since the permeability of the thermosensitive soft magnetic alloy patch 14 changes with temperature, when the ambient temperature rises and the magnetism weakens, the permeability of the thermosensitive soft magnetic alloy patch 14 will be optimized in sync, thereby partially compensating for the decrease in magnetic field strength and making the speaker sensitivity more stable under different temperatures. In order to further improve the sensing performance of the thermal soft magnetic alloy patch 14 to ambient temperature, a heat-conducting plate 25 is fixed inside the sealed housing 1 and at the lower end of the thermal soft magnetic alloy patch 14. A receiving groove 26 is opened inside the upper end of the heat-conducting plate 25, and the thermal soft magnetic alloy patch 14 is located inside the receiving groove 26 and is attached to the receiving groove 26. To facilitate sound dispersion, a sound guide seat 15 is provided at the upper end of the ceramic diaphragm 7. The sound guide seat 15 is fixed to the supporting frame 2. A sound output array hole 16 is opened inside the upper end of the sound guide seat 15. To improve waterproof performance, a polytetrafluoroethylene film 18 is provided at the upper end of the sound output array hole 16. Specifically, a waterproof seat 17 is fixed at the upper end of the sound guide seat 15 and outside the sound output array hole 16. The upper end of the waterproof seat 17 extends to the upper end of the sealed shell 1. The polytetrafluoroethylene film 18 is located inside the upper end of the waterproof seat 17 and is fixed to the waterproof seat 17. At the same time, a hydrophobic coating 19 is attached and fixed between the upper end of the polytetrafluoroethylene film 18 and the upper end of the sound output array hole 16 on the inner side of the waterproof seat 17. The use of polytetrafluoroethylene film 18 and hydrophobic coating 19 can achieve double waterproof protection. The polytetrafluoroethylene film 18 can isolate liquid water while allowing air to circulate freely, thereby ensuring the pressure balance inside and outside the speaker. At the same time, when the polytetrafluoroethylene film 18 fails, the hydrophobic coating 19 can immediately block water molecules from passing through, greatly improving the waterproof reliability and fault tolerance. In order to specifically absorb or enhance a particular frequency and optimize the frequency response curve to make the listening experience smoother and purer, a resonator 20 is fixed on the outside of the stainless steel shell 3. The upper end of the resonator 20 is attached to the sealed shell 1. A resonant cavity 21 is opened inside the resonator 20 and on the outside of the stainless steel shell 3. The inner side of the resonant cavity 21 is filled with a second porous sound-absorbing silicone 22. To facilitate the snap-fit installation of the sealed housing 1 with the external device, snap-fit guide rails 23 are symmetrically fixed at the bottom of the sealed housing 1. To facilitate the connection of the external audio line with the speaker, an interface module 28 is fixed at one end of the sealed housing 1. At the same time, to facilitate the fixation of the audio line and avoid the line from becoming messy and tangled, wire fasteners 24 are fixed on both sides of the sealed housing 1, and the two wire fasteners 24 are symmetrically arranged between them. Multiple guide fins 27 are fixed at equal intervals on the upper end of the sealed housing 1 and on the outer side of the polytetrafluoroethylene film 18. The multiple guide fins 27 can block liquid water from approaching the polytetrafluoroethylene film 18 to a certain extent, and can quickly guide and discharge liquid water. Furthermore, the tilted structure design of the upper end of the guide fins 27 makes it difficult for debris to adhere and stay, effectively keeping the appearance of the speaker clean.
[0018] It should be noted that the device structure and accompanying drawings of this invention mainly describe the principle of this invention. In terms of the technical aspects of this design principle, the setting of the device's power mechanism, power supply system and control system, etc., is not fully described. However, those skilled in the art who understand the principle of the above invention can clearly understand its power mechanism, power supply system and control system. The control method in the specific application document is automatic control through a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming. All standard parts used can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology. The structure and principle of the components known to those skilled in the art can be known by those skilled in the art through technical manuals or conventional experimental methods. Furthermore, the mechanical transmission components provided in this invention are all closed designs that can be opened for maintenance. According to the mechanical manual, as long as they are properly maintained, these mechanical transmission components can normally realize the transmission movement claimed above. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A highly sensitive, anti-interference, miniature waterproof loudspeaker, characterized in that: The enclosure includes a sealed housing (1), a support frame (2) is provided at the center of the inner side of the sealed housing (1), a stainless steel shell (3) is fixed to the outer side of the support frame (2), a voice coil ring seat (5) is fitted to the lower end of the support frame (2) and located inside the stainless steel shell (3), a titanium alloy diaphragm (6) is fixed to the inner side of the voice coil ring seat (5), a ceramic diaphragm (7) is fixed to the inner side of the titanium alloy diaphragm (6), the voice coil ring seat (5), the titanium alloy diaphragm (6), and the ceramic diaphragm (7) are integrally formed, and an inner magnetic post (1) is installed at the center of the bottom end of the voice coil ring seat (5). 0), the outer side of the inner magnetic column (10) is fitted with a main magnetic ring (11), the outer side of the main magnetic ring (11) is fitted with an outer magnetic cup (12), the upper end of the outer magnetic cup (12) is fitted with a stainless steel shell (3), the outer side of the outer magnetic cup (12) is fitted with a reverse magnetic ring (13), the upper end of the ceramic diaphragm (7) is fitted with a sound guide seat (15), the sound guide seat (15) is fixed with the supporting frame (2), the upper end of the sound guide seat (15) is provided with a sound output array hole (16), the upper end of the sound output array hole (16) is provided with a polytetrafluoroethylene film (18).
2. The high-sensitivity, anti-interference, miniature waterproof loudspeaker according to claim 1, characterized in that: A silicone suspension edge (8) is installed on the inner side of the upper end of the voice coil ring seat (5) and on the outer side of the titanium alloy diaphragm (6). A first porous sound-absorbing silicone (9) is filled on the inner side of the lower end of the voice coil ring seat (5) and on the upper end of the main magnetic ring (11).
3. The high-sensitivity, anti-interference, miniature waterproof loudspeaker according to claim 1, characterized in that: A thermosensitive soft magnetic alloy patch (14) is attached to the center of the bottom of the outer magnetic cup (12). A waterproof seat (17) is fixed at the upper end of the sound guide seat (15) and outside the sound output array hole (16). The upper end of the waterproof seat (17) extends to the upper end of the sealed shell (1). The polytetrafluoroethylene film (18) is located inside the upper end of the waterproof seat (17) and is fixed to the waterproof seat (17).
4. A high-sensitivity, anti-interference, miniature waterproof loudspeaker according to claim 3, characterized in that: A heat-conducting plate (25) is fixed inside the sealed housing (1) and at the lower end of the thermosensitive soft magnetic alloy patch (14). A receiving groove (26) is opened inside the upper end of the heat-conducting plate (25). The thermosensitive soft magnetic alloy patch (14) is located inside the receiving groove (26) and is attached to the receiving groove (26).
5. A high-sensitivity, anti-interference, miniature waterproof loudspeaker according to claim 3, characterized in that: A hydrophobic coating (19) is attached and fixed to the inner side of the waterproof base (17) and between the upper end of the polytetrafluoroethylene film (18) and the upper end of the sound array hole (16).
6. A high-sensitivity, anti-interference, miniature waterproof loudspeaker according to claim 1, characterized in that: A resonator (20) is fixed on the outside of the stainless steel shell (3). The upper end of the resonator (20) is attached to the sealed shell (1). A resonant cavity (21) is opened inside the resonator (20) and located on the outside of the stainless steel shell (3). The inner side of the resonant cavity (21) is filled with a second porous sound-absorbing silicone (22).
7. A high-sensitivity, anti-interference, miniature waterproof loudspeaker according to claim 1, characterized in that: The bottom end of the sealed housing (1) is symmetrically fixed with a snap-fit guide rail (23), and both sides of the sealed housing (1) are fixed with wire fasteners (24). The two wire fasteners (24) are symmetrically arranged between each other. Multiple flow guide fins (27) are equidistantly fixed at the upper end of the sealed housing (1) and outside the polytetrafluoroethylene film (18).
8. A high-sensitivity, anti-interference, miniature waterproof loudspeaker according to claim 1, characterized in that: An interface module (28) is fixedly connected to one end of the sealed housing (1).
9. A high-sensitivity, anti-interference, miniature waterproof loudspeaker according to claim 1, characterized in that: A centering support plate (4) is fixed at the upper end of the load-bearing frame (2) and inside the stainless steel shell (3).