Directional loudspeaker for highway tunnel prompting system
By designing an expandable horn component to adjust the sound wave propagation range of the directional speaker, the problem of deteriorating sound quality of the directional speaker outside a specific area is solved, ensuring that the driver can receive information clearly.
Patent Information
- Application Number
- CN202422923656.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-11-28
AI Technical Summary
The sound quality of directional speakers degrades outside the specific listening area, resulting in discontinuous sound information and some drivers being unable to receive it clearly.
The design of an expandable horn assembly includes a horn cover, baffles, electric push rods and horn plates. The angle of the horn plate is adjusted by the electric push rod to expand or narrow the sound propagation range, ensuring clear sound propagation in the specified area.
It achieves clear sound propagation in a specific area, prevents sound from spreading to vehicles that do not need to receive it, and ensures that drivers can receive continuous and clear information.
Smart Images
Figure CN223428548U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of audio equipment, in particular to a directional loudspeaker for a highway tunnel prompt system. Background Art
[0002] Directional speakers are broadcasting devices that precisely focus sound on a specific area or target, transmitting it to a specific location. They can be used for precise voice announcements and warnings during driver intervention on highways and in tunnels. For example, they can be installed on highway diversions, public service areas, toll booths, ramps, highway exits, and accident-prone areas. They deliver effective information only within designated lanes, without interfering with oncoming lanes or adjacent villages.
[0003] Directional speakers are often used in highway tunnel warning systems due to their high efficiency and low distortion. However, their strong directionality results in a more concentrated sound distribution, which means that the sound quality drops significantly outside the specific listening area, causing some drivers to receive discontinuous sound information.
[0004] Therefore, since the sound distribution of the above-mentioned directional speakers is relatively concentrated, the sound quality will be greatly reduced outside the specific listening area, which will cause some drivers to receive discontinuous sound information. A directional speaker can be designed for the highway tunnel warning system to solve the above problem. Utility Model Content
[0005] In order to overcome the problem that during the use of directional speakers, the sound distribution is relatively concentrated, resulting in a significant drop in sound quality outside the specific listening area, which may cause some drivers to receive discontinuous sound information.
[0006] The technical solution of the utility model is as follows: a directional loudspeaker for a highway tunnel warning system includes a loudspeaker body, a dust cover arranged at the front end of the loudspeaker body, and an expandable horn assembly arranged at the front end of the dust cover; the expandable horn assembly includes a horn guard, a baffle, a first swivel seat, a first electric push rod, a second swivel seat, a second electric push rod, a center horn plate, a first side horn plate, a second side horn plate, a docking block, a docking groove, and a hinge.
[0007] Preferably, the first side horn plate and the second side horn plate are butted by the butt blocks and the butt grooves in normal state to build the horn with relatively concentrated sound amplification range, the sound emitted by the loudspeaker body enters the horn after passing through the dust cover, is concentrated by the horn and propagated to the designated area; when it is needed to increase the sound propagation range, the first side horn plate and the second side horn plate are pulled apart to the two sides through the first electric push rod and the second rotating seat, and then the two center horn plates are pushed by the two second electric push rods, so that the upper and lower center horn plates are butted with the first side horn plate and the second side horn plate through the butt blocks and the butt grooves, thereby building the horn with wider sound amplification range, so that the sound amplification range of the horn is increased when needed, more drivers can receive clear and continuous sound information, and the horn can return to the original state in normal state, so that the sound is more concentrated and information diffusion to vehicles that do not need to receive is avoided.
[0008] Preferably, the front end of the dust cover is provided with a horn guard through a screw, the inner side of the front end of the horn guard is fixedly connected with a baffle, and the rear end in the horn guard is fixedly connected with two first rotating seats, and the two first rotating seats are arranged on the two sides in the horn guard.
[0009] Preferably, the front end of the first rotating seat is rotatably connected with a first electric push rod, the front end of the first electric push rod is rotatably connected with a second rotating seat, and the upper and lower ends of the inner side of the horn guard are provided with second electric push rods.
[0010] Preferably, the center horn plate is arranged on the second electric push rod, one side of the center horn plate is provided with a first side horn plate, and the other side of the center horn plate is provided with a second side horn plate.
[0011] Preferably, the butt blocks are fixedly connected to one side of the upper and lower ends of the center horn plate and one side of the upper and lower ends of the first side horn plate, the butt grooves are arranged on the other side of the upper and lower ends of the center horn plate and one side of the upper and lower ends of the second side horn plate, and the butt blocks and the butt grooves are butted.
[0012] Preferably, the rear end of the first side horn plate and the rear end of the second side horn plate are provided with hinges, and the first side horn plate and the second side horn plate are rotatably connected with the horn guard through the hinges.
[0013] Preferably, the outer side of the loudspeaker body is provided with a loudspeaker shell, the rear end of the loudspeaker shell is provided with a metal clamping plate, one side of the rear end of the metal clamping plate is provided with a nut, and the other side of the rear end of the metal clamping plate is provided with a bolt in gap cooperation with the nut.
[0014] The utility model discloses the beneficial effects of:
[0015] 1. By setting up an expandable horn assembly, the first side horn plate and the second side horn plate are connected in normal state to form a horn with a relatively concentrated sound amplification range, making the sound more concentrated and preventing the information from spreading to vehicles that do not need to receive it. When the sound propagation range needs to be increased, the first side horn plate and the second side horn plate are pulled apart to the sides by the first electric push rod, and then the two center horn plates are connected to the first side horn plate and the second side horn plate by the second electric push rod to construct a horn with a wider sound amplification range, thereby increasing the sound amplification range of the horn and allowing more drivers to receive clear and continuous sound information. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 What is shown is a schematic diagram of the overall structure of the utility model;
[0017] Figure 2 Shown is a schematic diagram of the dust cover structure of the present utility model;
[0018] Figure 3 Shown is a schematic diagram of the structure of the first electric push rod of the present utility model;
[0019] Figure 4 Shown is a schematic diagram of the first side horn plate structure of the present invention;
[0020] Figure 5 Shown is a schematic diagram of the center horn plate structure of the present invention.
[0021] Explanation of the accompanying drawings: 1. Speaker body; 2. Dust cover; 301. Horn guard; 302. Baffle; 303. First swivel seat; 304. First electric push rod; 305. Second swivel seat; 306. Second electric push rod; 307. Center horn plate; 308. First side horn plate; 309. Second side horn plate; 310. Docking block; 311. Docking groove; 312. Hinge; 4. Speaker housing; 5. Metal splint; 6. Nut; 7. Bolt. DETAILED DESCRIPTION
[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0023] See also Figure 1-Figure 5The utility model provides an embodiment: a directional loudspeaker for a highway tunnel warning system, comprising a loudspeaker body 1, a dust cover 2 arranged at the front end of the loudspeaker body 1, and an expandable horn assembly arranged at the front end of the dust cover 2; the expandable horn assembly comprises a horn shield 301, a baffle 302, a first swivel seat 303, a first electric push rod 304, a second swivel seat 305, a second electric push rod 306, a central horn plate 307, a first side horn plate 308, a second side horn plate 309, a docking block 310, a docking groove 311, and a hinge 312. A loudspeaker shell 4 is installed on the outer side of the loudspeaker body 1, a metal splint 5 is installed on the rear end of the loudspeaker shell 4, a nut 6 is installed on one side of the rear end of the metal splint 5, and a bolt 7 with a clearance fit with the nut 6 is provided on the other side of the rear end of the metal splint 5.
[0024] See also Figure 3-Figure 5 In this embodiment, a horn shield 301 is mounted on the front end of the dust cover 2 by screws, a baffle 302 is fixed to the inner side of the front end of the horn shield 301, and two first rotating seats 303 are fixed to the rear end of the interior of the horn shield 301, and the two first rotating seats 303 are respectively arranged on both sides of the interior of the horn shield 301, and the front ends of the first rotating seats 303 are rotatably connected to the first electric push rod 304, and the front ends of the first electric push rod 304 are rotatably connected to the second rotating seat 305, and the upper and lower ends of the inner side of the horn shield 301 are both installed with second electric push rods 306, and the second electric push rods 306 are both installed with a central horn plate 307, and the central horn plate 30 A first side horn plate 308 is provided on one side of the center horn plate 307, and a second side horn plate 309 is provided on the other side of the center horn plate 307. A docking block 310 is fixedly connected to one side of the upper and lower ends of the center horn plate 307 and one side of the upper and lower ends of the first side horn plate 308. A docking groove 311 is provided on the other side of the upper and lower ends of the center horn plate 307 and one side of the upper and lower ends of the second side horn plate 309, and the docking block 310 is docked with the docking groove 311. Hinge 312 is installed at the rear ends of the first side horn plate 308 and the second side horn plate 309, and the first side horn plate 308 and the second side horn plate 309 are rotatably connected to the horn cover 301 through the hinge 312.
[0025] During normal use, the first side horn plate 308 and the second side horn plate 309 are docked with the docking block 310 and the docking groove 311 to form a horn with a relatively concentrated sound amplification range. The sound emitted by the loudspeaker body 1 passes through the dust cover 2 and enters the horn, where it is concentrated and propagated to a designated area.
[0026] When the sound propagation range needs to be increased, the first side horn plate 308 and the second side horn plate 309 are pulled apart by the first electric push rod 304 and the second rotating seat 305, and then the two center horn plates 307 are pushed by the two second electric push rods 306, so that the upper and lower center horn plates 307 are docked with the first side horn plate 308 and the second side horn plate 309 through the docking block 310 and the docking groove 311, to build a horn with a wider sound propagation range, so as to increase the sound propagation range of the horn when needed, so that more drivers can receive clear and continuous sound information, and the horn can return to the original state at ordinary times, so that the sound is more concentrated, and information is avoided from being spread to vehicles that do not need to receive.
[0027] Through the above steps, by setting the expandable horn assembly, the first side horn plate 308 and the second side horn plate 309 are docked at ordinary times to build a horn with a relatively concentrated sound propagation range, so that the sound is more concentrated and information is avoided from being spread to vehicles that do not need to receive. When the sound propagation range needs to be increased, the first side horn plate 308 and the second side horn plate 309 are pulled apart by the first electric push rod 304, and then the two center horn plates 307 are docked with the first side horn plate 308 and the second side horn plate 309 by the second electric push rod 306, to build a horn with a wider sound propagation range, so as to increase the sound propagation range of the horn, so that more drivers can receive clear and continuous sound information.
Claims
1. A directional loudspeaker for a highway tunnel warning system, comprising a loudspeaker body (1) and a dust cover (2) disposed at the front end of the loudspeaker body (1), characterized in that: The invention also includes an expandable horn assembly arranged at the front end of the dust cover (2); the expandable horn assembly includes a horn shield (301), a blocking bar (302), a first rotating seat (303), a first electric push rod (304), a second rotating seat (305), a second electric push rod (306), a central horn plate (307), a first side horn plate (308), a second side horn plate (309), a docking block (310), a docking groove (311), and a hinge (312).
2. The directional speaker for a highway tunnel warning system according to claim 1, characterized in that: The front end of the dust cover (2) is fixed with a horn shield (301) by screws, the inner side of the front end of the horn shield (301) is fixed with a blocking bar (302), the rear end inside the horn shield (301) is fixed with two first rotating seats (303), and the two first rotating seats (303) are respectively arranged on both sides of the inside of the horn shield (301).
3. The directional speaker for a highway tunnel warning system according to claim 2, characterized in that: The front end of the first rotating seat (303) is rotatably connected to the first electric push rod (304), the front end of the first electric push rod (304) is rotatably connected to the second rotating seat (305), and the upper and lower ends of the inner side of the horn shield (301) are both installed with the second electric push rod (306).
4. The directional speaker for a highway tunnel warning system according to claim 3, characterized in that: A central horn plate (307) is installed on each of the second electric push rods (306), a first side horn plate (308) is provided on one side of the central horn plate (307), and a second side horn plate (309) is provided on the other side of the central horn plate (307).
5. The directional loudspeaker for a highway tunnel warning system according to claim 4, characterized in that: One side of the upper and lower ends of the central horn plate (307) and one side of the upper and lower ends of the first side horn plate (308) are both fixedly connected with a docking block (310), and the other side of the upper and lower ends of the central horn plate (307) and one side of the upper and lower ends of the second side horn plate (309) are both provided with a docking groove (311), and the docking block (310) and the docking groove (311) are docked.
6. The directional loudspeaker for a highway tunnel warning system according to claim 5, characterized in that: The rear ends of the first side horn plate (308) and the second side horn plate (309) are both installed with hinges (312), and the first side horn plate (308) and the second side horn plate (309) are rotatably connected to the horn shield (301) through the hinges (312).
7. The directional speaker for a highway tunnel warning system according to claim 1, characterized in that: A speaker housing (4) is installed on the outside of the speaker body (1), a metal clamping plate (5) is installed on the rear end of the speaker housing (4), a nut (6) is installed on one side of the rear end of the metal clamping plate (5), and a bolt (7) that is loosely fitted with the nut (6) is provided on the other side of the rear end of the metal clamping plate (5).