An omnidirectional radiation fog horn

Abstract

This utility model relates to an omnidirectional radiating fog whistle. Inside the shell, from bottom to top, a central magnetic base, a magnet, an electrode plate, and a frame are sequentially supported and connected to the shell base via a ring of bolts running from top to bottom. A vibrating plate supports the frame, and a sound guide tube is pressed onto the vibrating plate. The outer circumference of the sound guide tube's upper opening is sealed by a cover plate and pressed tightly against the upper end of the shell, then locked with bolts. Multiple support columns are arranged around the circumference of the cover plate, and an omnidirectional radiating horn is locked onto these support columns. The lower end of the omnidirectional radiating horn has an inverted conical structure, coaxial with the center upper opening of the sound guide tube. The lower end of the vibrating plate is bolted to a voice coil frame, and a voice coil is wound around the lower end of the voice coil frame. The gap between the voice coil and the magnetic column portion of the electrode plate and the central magnetic base is positioned between the voice coil and the voice coil frame. Multiple perforated holes are formed around the circumference of the voice coil frame. Its structure is simple, achieves omnidirectional radiation, is stable in harsh environments, has a long lifespan, and provides stable sound transmission performance.

Description

Technical Field

[0001] This utility model relates to a sound-emitting device, specifically an omnidirectional radiating fog whistle. Background Technology

[0002] In maritime, port, and waterway sectors, fog whistles serve as crucial acoustic warning devices. They must transmit warning signals through stable, long-distance, and wide-range sound radiation in low-visibility environments such as fog, rain, and snow to ensure the safety of ship navigation and operations. Their core technology relies on the structural design and sound performance of the loudspeaker system. Currently, most fog whistle products on the market are designed based on traditional loudspeaker principles. Core components include a diaphragm assembly consisting of a diaphragm, voice coil, and voice coil frame, as well as auxiliary structures such as a magnetic base, magnet, electrode plate, and shell. Traditional diaphragm assemblies commonly use vulcanized or glued bonding for component connections. The stability of these bonded structures is easily affected by the environment. Fog whistles operate under constant vibration and must withstand temperature and humidity changes and salt spray corrosion in the marine environment, making them prone to aging, cracking, and even detachment of the adhesive layer. This directly leads to diaphragm assembly failure, requiring complete component replacement, resulting in high maintenance costs and disruption to continuous equipment operation. Meanwhile, traditional voice coil skeletons are mostly solid structures with poor heat dissipation. When the voice coil is working, it generates heat due to the current passing through it. The solid skeleton cannot allow internal air circulation, and the heat easily accumulates between the voice coil and the skeleton, causing abnormal changes in the voice coil impedance. This leads to frequency shifts, distortion of the warning sound, and in severe cases, even burnout of the voice coil. The vibration resistance inside the sound cavity is large. When the voice coil skeleton vibrates up and down with the voice coil, the air inside the solid structure cannot be quickly expelled or drawn in, forming air damping. This hinders the vibration response speed of the skeleton, resulting in insufficient sound power and delayed response of the fog whistle. Especially in emergency warning scenarios, it is difficult to transmit signals quickly. Summary of the Invention

[0003] This invention addresses the technical deficiencies of existing fog whistles in terms of the reliability of the diaphragm assembly connection, the heat dissipation and vibration performance of the voice coil skeleton, and the omnidirectional sound radiation effect. It provides a fog whistle with a simple structure, capable of omnidirectional radiation, stable application in harsh environments, long lifespan, and stable sound transmission performance.

[0004] The technical solution adopted by this utility model is: an omnidirectional radiating fog whistle, including a shell, characterized in that: the shell is supported and connected from bottom to top in the following order: a middle magnetic base, a magnet, an electrode plate, and a frame, and is connected to the shell base by a ring of multiple bolts from top to bottom; a vibrating plate is supported on the frame; a sound guide tube is pressed onto the vibrating plate; the outer circumference of the sound guide tube is sealed by a cover plate and pressed tightly onto the upper end of the shell and locked by bolts; multiple support columns are arranged around the circumference of the cover plate; an omnidirectional radiating horn is locked and connected to the support columns; the lower end of the omnidirectional radiating horn has an inverted conical structure and its coaxial axis corresponds to the center upper opening of the sound guide tube; the lower end of the vibrating plate is locked and connected to a voice coil frame by bolts; the lower end of the voice coil frame is wound with a voice coil; the gap between the voice coil is placed between the magnetic column part of the electrode plate and the middle magnetic base; multiple hollow holes are opened around the circumference of the voice coil frame.

[0005] The intermediate magnetic base includes an integrally connected base body and a magnetic column part. The magnetic column part is located at the upper center of the base body part, the magnet is supported on the base body part, and the bolt passes through the base body part to lock the housing base.

[0006] The magnet is a strong magnet.

[0007] The upper end of the frame is provided with a ring of frame bosses, and the inner ring of the plate seat head structure on the outer periphery of the vibrating plate is attached to the outer ring of the frame bosses, or the outer ring of the plate seat head structure on the outer periphery of the vibrating plate is attached to the inner ring of the frame bosses.

[0008] The upper end of the vibrating plate base is provided with an upper groove or upper boss, and the lower end of the sound guide tube is provided with a lower boss or lower groove corresponding to the upper groove or upper boss.

[0009] The voice coil frame is locked in place by a bolt passing through the center of the vibrating plate.

[0010] The voice coil skeleton has a conical structure that is smaller at the top and larger at the bottom, with perforations set on the conical structure.

[0011] The support column is a bolted structure, with a locking cover plate and a housing passing through the lower part of the support column, and a locking omnidirectional radiating horn passing through the upper part.

[0012] The voice coil skeleton is made of lightweight fiber material.

[0013] The beneficial effects of this utility model are: 1. The system employs a fully bolted connection, ensuring rigid fixation of components such as the central magnetic base, magnet, pole plate, and frame within the housing, as well as the central connection between the diaphragm and voice coil frame, and the encapsulation of the cover plate and housing. This stable connection structure significantly improves component reliability compared to traditional diaphragm assemblies where the voice coil, suspension edge, and diaphragm suffer from vulcanization, bonding, aging, and cracking under vibration, salt spray, and temperature / humidity variations. It also extends equipment lifespan and reduces maintenance costs. When the voice coil or diaphragm fails, there is no need to replace the entire diaphragm assembly. Only the corresponding bolts need to be removed for repair or replacement, which reduces maintenance costs, minimizes equipment downtime, and ensures continuous warning operation.

[0014] 2. The voice coil skeleton utilizes a conical structure with perforated holes to solve the heat dissipation problem of traditional solid skeletons. Heat generated by the voice coil can be quickly dissipated through the circumferential perforations on the conical structure, allowing for airflow and preventing heat buildup that could lead to abnormal voice coil impedance, frequency shifts, and burnout. This ensures stable frequency output and distortion-free warning sounds during prolonged operation. Furthermore, the perforations eliminate air damping in solid structures, increasing the voice coil skeleton's response speed with the reciprocating vibrations of the voice coil. This avoids issues of insufficient sound power and response delays, enabling rapid signal transmission in emergency warning scenarios and improving safety efficiency. The lightweight fiber material significantly reduces the weight of the voice coil skeleton. Combined with a strong magnet and an integrated magnetic pillar structure with a central magnetic guide base, this enhances magnetic circuit efficiency, resulting in more even force distribution on the voice coil in the magnetic field. This further improves sound stability and makes it suitable for continuous operation in harsh environments such as maritime and port environments.

[0015] 3. The inverted conical structure of the external omnidirectional radiating horn, with its lower end coaxially aligned with the upper center of the sound guide tube, allows for 360° uniform diffusion of the sound transmitted by the sound guide tube. This completely eliminates the blind spots of traditional fog horns' unidirectional and semi-directional radiation, ensuring that warning signals can be received in all directions around the ship. This achieves 360° omnidirectional and efficient radiation, eliminating blind spots and enhancing sound penetration. The precise alignment of the inverted conical structure with the upper axis of the sound guide tube reduces sound loss during transmission. Simultaneously, the external horn design enhances sound penetration, increasing the effective warning distance compared to traditional fog horns in low-visibility environments such as fog and rain, meeting the warning needs of medium- and long-distance waterways.

[0016] 4. The inner or outer ring of the frame boss and the diaphragm seat head are designed to fit flexibly according to the size of the diaphragm, while ensuring the coaxiality of the diaphragm support and avoiding sound loss caused by vibration offset; the groove and boss matching structure of the diaphragm and the sound guide tube enhances the sealing of the connection between the two, reduces sound leakage from gaps, and improves sound conduction efficiency. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 for Figure 1 Internal structure diagram.

[0018] In the diagram: 1. Housing; 2. Support locking bolt; 3. Omnidirectional radiating horn; 4. Cover plate; 5. Sound guide tube; 6. Middle magnetic guide seat; 7. Magnet; 8. Electrode plate; 9. Frame; 10. Inner locking hole; 11. Vibrating plate; 12. Locking hole; 13. Voice coil frame; 14. Hollow hole; 15. Voice coil; 16. Frame boss; 17. Plate seat head; 18. Upper groove; 19. Lower boss. Detailed Implementation

[0019] The following description, in conjunction with the accompanying drawings and embodiments, provides further details.

[0020] Figure 1 , 2 As shown: An omnidirectional radiating fog whistle includes: a shell 1, a supporting locking bolt 2, an omnidirectional radiating horn 3, a cover plate 4, a sound guide tube 5, an intermediate magnetic guide seat 6, a magnet 7, an electrode plate 8, a frame 9, a vibrating plate 11, a voice coil frame 13, a voice coil 15, a frame boss 16, and a plate base head 17.

[0021] Inside the housing 1, from bottom to top, the intermediate magnetic base 6, magnet 7, pole plate 8, and frame 9 are sequentially supported and connected, and are locked to the housing base by a ring of multiple bolts from top to bottom through their corresponding inner locking holes 10. The frame 9 supports the vibration plate 11, and the upper end of the frame 9 is provided with a ring of frame bosses 16. The outer periphery of the vibration plate 11 is a thickened plate head 17 structure, and the inner ring of the plate head 17 is attached to the outer ring of the frame bosses 16 fibers. The diaphragm 11 is connected to the lower boss 19 on the side of the sound guide tube 5 via its upper groove 18 and is pressed by the sound guide tube 5. The outer periphery of the upper opening of the sound guide tube 5 is pressed by the upper end of the housing 1 through the cover plate 4 and locked by the support locking bolt 2. The support locking bolt 2 is locked above the cover plate to the omnidirectional radiating horn 3. The lower end of the omnidirectional radiating horn 3 has an inverted conical structure and its coaxial axis corresponds to the upper center of the sound guide tube 5. The lower center locking hole 12 of the diaphragm 11 is locked to the voice coil skeleton 13 by bolts. Multiple hollow holes 14 are opened around the circumference of the voice coil skeleton 13. The lower end of the voice coil skeleton 13 is wound with the voice coil 15. The voice coil gap 15 is placed between the pole plate 8 and the magnetic column part of the intermediate magnetic guide seat 6. The magnetic column part is set at the upper center of the intermediate magnetic guide seat 6 and is integrally connected. The magnet is supported on the seat part.

[0022] In this embodiment, the magnet is a strong magnet.

[0023] In this embodiment, the voice coil skeleton between the voice coil and the diaphragm has a conical structure that is smaller at the top and larger at the bottom, and the hollow holes are set on the conical structure.

[0024] In this embodiment, the voice coil skeleton is preferably made of lightweight fiber material.

Claims

1. An omni-directional radiating siren comprising a housing, characterized in that: The housing consists of a central magnetic base, a magnet, an electrode plate, and a frame, which are connected from bottom to top and secured to the housing base by multiple bolts running from top to bottom. A vibrating plate is supported on the frame, and a sound guide tube is pressed onto the vibrating plate. The outer circumference of the sound guide tube is sealed by a cover plate and pressed against the upper end of the housing, then secured with bolts. Multiple support columns are arranged around the circumference of the cover plate, and an omnidirectional radiating horn is locked onto the support columns. The lower end of the omnidirectional radiating horn has an inverted conical structure and its coaxial axis corresponds to the center upper opening of the sound guide tube. The lower end of the vibrating plate is secured to a voice coil frame by bolts, and a voice coil is wound around the lower end of the voice coil frame. The gap between the voice coil and the magnetic column portion of the central magnetic base is located between the electrode plate and the central magnetic base. Multiple perforated holes are opened around the circumference of the voice coil frame.

2. The omni-directional radiating siren of claim 1, wherein: The intermediate magnetic base includes an integrally connected base body and a magnetic column part. The magnetic column part is located at the upper center of the base body part, the magnet is supported on the base body part, and the bolt passes through the base body part to lock the housing base.

3. The omni-directional radiating siren of claim 1, wherein: The magnet is a strong magnet.

4. The omni-directional radiating siren of claim 1 wherein: The upper end of the frame is provided with a ring of frame bosses, and the inner ring of the plate seat head structure on the outer periphery of the vibrating plate is attached to the outer ring of the frame bosses, or the outer ring of the plate seat head structure on the outer periphery of the vibrating plate is attached to the inner ring of the frame bosses.

5. The omni-directional radiating siren of claim 1 or 4, wherein: The upper end of the vibrating plate base is provided with an upper groove or upper boss, and the lower end of the sound guide tube is provided with a lower boss or lower groove corresponding to the upper groove or upper boss.

6. The omni-directional radiating siren of claim 1 wherein: The voice coil frame is locked in place by a bolt passing through the center of the vibrating plate.

7. The omni-directional radiating siren of claim 1 wherein: The voice coil skeleton has a conical structure that is smaller at the top and larger at the bottom, with perforations set on the conical structure.

8. The omni-directional radiating siren of claim 1 wherein: The support column is a bolted structure, with a locking cover plate and a housing passing through the lower part of the support column, and a locking omnidirectional radiating horn passing through the upper part.

9. The omni-directional radiating siren of claim 1 or 7, wherein: The voice coil skeleton is made of lightweight fiber material.

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