CN213751310U

CN213751310U - Fire acousto-optic alarm

Info

Publication number: CN213751310U
Application number: CN202022049523.9U
Authority: CN
Inventors: 杨宇; 谢海东; 芮玉佩; 谢友亮
Original assignee: Jade Bird Fire Co Ltd
Current assignee: Jade Bird Fire Co Ltd
Priority date: 2020-09-16
Filing date: 2020-09-16
Publication date: 2021-07-20
Anticipated expiration: 2030-09-16

Abstract

The utility model discloses a fire acousto-optic alarm, the shell of which comprises a base, an upper shell and a lampshade which are mutually connected, one part of the top of the shell is a top plate of a bee sound cavity, the top plate of the bee sound cavity is provided with an annular cavity groove towards the extension direction of the inner side of the shell, and the inner side surface of the cavity groove and a buzzer sheet are connected to form a sound outlet cavity with acoustic resonance; and a sound outlet communicated with the sound outlet cavity is formed in the top plate of the bee sound cavity. The utility model discloses having arranged buzzing cavity structure to the topmost of product, buzzing cavity is connected with the shell integration, because the bee sounds the chamber and is located the surface, the sound wave that the sound wave sent from the play sound chamber directly spreads to the conflagration scene of taking place after sending in the play sound hole in chamber is sounded to the bee, has avoidd the loss of sound wave in the shell, has improved emergence efficiency.

Description

Fire acousto-optic alarm

Technical Field

The utility model relates to a fire alarm equipment for conflagration reputation siren under the low-power consumption fire alarm system requirement.

Background

In the traditional fire linkage alarm system, a four-wire system is generally adopted, namely, a loop +, a loop-, 24V + and 24V-. However, with the development of industries in recent years, more and more manufacturers have introduced two-wire systems in order to reduce the field construction cost, and due to the limited power supply capability of the loop, the traditional 24V power supply fire acousto-optic alarm cannot meet the use requirement under low power consumption, so that the sound pressure level of the product cannot meet the requirement of the national standard GB 26851-2011.

In the current field, most manufacturers purchase a buzzer as an acousto-optic alarm (hereinafter referred to as acousto-optic) as a sounding device, and the buzzer must be placed inside a product due to the consideration of appearance and protectiveness, so that most of sound waves emitted from the buzzer are reflected in an acousto-optic shell to cause loss and then emitted from a sound outlet on the surface of the product, the sound pressure is reduced, if the sound pressure is required to be ensured, the power consumption of the product is improved only by improving the power supply current, and the power supply efficiency of a fire alarm system is reduced.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a conflagration audible and visual alarm, the sound production efficiency of buzzing piece promotes by a wide margin, and the sound wave can cause minimum energy loss after sending from the buzzing intracavity.

In order to solve the technical problem, the utility model provides a fire acousto-optic alarm, the shell of which comprises a base, an upper shell and a lampshade which are mutually connected, one part of the top of the shell is a top plate of a bee sound cavity, the top plate of the bee sound cavity is provided with an annular cavity groove towards the extension direction of the inner side of the shell, and the inner side surface of the cavity groove and a buzzer sheet are connected to form a sound outlet cavity with acoustic resonance; and a sound outlet communicated with the sound outlet cavity is formed in the top plate of the bee sound cavity.

Further, the bottom surface of the cavity groove is connected with the buzzer piece along the circumferential direction.

Furthermore, the bottom surface of the cavity groove is in a pointed shape, and the bottom surface of the cavity groove is connected with the buzzer piece through an epoxy resin adhesive node.

Furthermore, the diameter of the sound outlet hole is 6-9 mm.

Furthermore, the height of the sound outlet cavity is 3-5 mm, and the width of the sound outlet cavity is 22-24 mm.

Furthermore, the thickness of the top plate of the bee sound cavity is 1-3 mm.

Further, the buzzer cavity is movably connected with the lampshade through a buckle.

The technical effects of the utility model reside in that:

1. the utility model discloses the roof in conflagration audible and visual alarm's shell top is the bee and sounds the chamber, the bee sound the chamber the roof to the inboard extending direction of shell is equipped with annular chamber groove, and chamber groove and buzzing piece constitute out the sound chamber. Because the utility model discloses having arranged the top of product with buzzing cavity structure, buzzing cavity is connected with the shell integration, because the bee sounds the chamber and is located the surface, the sound wave that the sound wave sent from the sound cavity directly spreads the conflagration scene of taking place after sending in the sound hole in via the bee sound cavity, has avoidd the loss of sound wave in the shell, and the sound wave can cause minimum energy loss after sending from the buzzing intracavity, has improved emergence efficiency.

2. The utility model discloses a buzzing chamber is located the topmost of shell, and the surface of its roof is the plane, just so makes product sound wave propagation efficiency highest, and the sound wave can be even propagate to 0 ~180 all directions on, makes the acoustic pressure of every angle all close, and especially the product reduces by a wide margin at the acoustic pressure of 15 and 165 two directions, satisfies the requirement of national standard GB26851-2011, satisfies the operation requirement under the conflagration reputation siren of traditional 24V power supply satisfies the low-power consumption.

3. The utility model discloses a buzzing chamber and buzzing piece adopt epoxy to glue node formula and connect, make the amplitude of buzzing piece increase, are convenient for take place sympathetic response phenomenon, make the acoustic pressure improve greatly.

Drawings

FIG. 1 is an isometric view of the fire acousto-optic alarm of the present invention;

FIG. 2 is a front view of the fire acousto-optic alarm of the present invention;

FIG. 3 is a schematic view of the sound wave transmission of the fire acousto-optic alarm of the present invention;

fig. 4 is an isometric view of the bee blast chamber of the present invention;

FIG. 5 is a cross-sectional view of the bee calling cavity and the buzzer of the present invention;

fig. 6 is an exploded view of the acoustic fire alarm of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.

As shown in fig. 1-6, a fire acousto-optic alarm 10 of the present invention comprises a base 7, an upper shell 4 and a lampshade 3 connected to each other from bottom to top. The base 7 is further connected with a middle buckle 6, the middle buckle 6 is fixedly connected with the upper shell 4 in a clamping mode, and a circuit board 5 is arranged in an inner space formed between the middle buckle 6 and the upper shell 4.

In this embodiment, a part of the top of the housing is a top plate 11 of the buzzer chamber 1, an annular chamber groove 12 is formed in the top plate 11 of the buzzer chamber 1 in the direction extending towards the inside of the housing, and the inner side of the chamber groove 12 and the buzzer 2 are connected to form a sound-emitting chamber 9 with acoustic resonance. The top plate 11 of the bee sound cavity 1 is provided with a sound outlet hole 14 communicated with the sound outlet cavity 9. The outer surface of the top plate 11 is a plane, and sound waves can be uniformly transmitted to all directions of 0-180 degrees, so that the sound pressure at each angle is similar.

The bottom surface of a cavity groove 12 of the buzzer cavity 1 is connected with the buzzer piece 2 along the circumferential direction, the bottom surface of the cavity groove 12 is in a pointed shape, the contact area between the cavity groove 12 and the buzzer piece 2 is reduced, and in the further embodiment, the bottom surface of the cavity groove 14 is connected with the buzzer piece 2 through an epoxy resin adhesive node type, so that the amplitude of the buzzer piece 2 is increased.

In this embodiment, the resonance frequency of the buzzer 2 is 3kHz, and through tests, the height of the sound cavity 9 is 3-5 mm, and the width is 22-24 mm. The diameter of the sound outlet hole 14 is 6-9 mm, and the thickness of the top plate 11 of the buzzer cavity 1 is 1-3 mm. The frequency of the buzzer cavity 1 is the same as the resonance frequency of the buzzer 2, so that when the frequency of the sounding cavity 9 reaches the resonance frequency point of the buzzer 2, the resonance phenomenon occurs, and the sound pressure is greatly improved.

The buzzer cavity 1 is movably connected with the lampshade 3 through a buckle, and the buckle is a hook-shaped protrusion 31 arranged on the buzzer cavity 1 and a clamping groove 31 arranged on the lampshade 3 which are matched and fixedly connected. In order to avoid the production of noise under the high frequency, have buckle structure and hot melt post that are used for fixing on the buzzing chamber 1 for connect lamp shade 3, the effectual fit clearance that has reduced avoids causing the noise because the cooperation is not hard up in the vibration.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.

Claims

1. A fire acousto-optic alarm comprises a shell, an upper shell and a lampshade, wherein the base, the upper shell and the lampshade are mutually connected; and a sound outlet communicated with the sound outlet cavity is formed in the top plate of the bee sound cavity.

2. The acousto-optic fire alarm according to claim 1, wherein the buzzer is circumferentially connected to the bottom surface of the cavity.

3. The acousto-optic fire alarm according to claim 1, wherein the bottom surface of the cavity is in the shape of a pointed top, and the bottom surface of the cavity is connected with the buzzer piece through an epoxy resin adhesive node.

4. The acousto-optic fire alarm according to claim 1, wherein the diameter of the sound outlet hole is 6-9 mm.

5. The acousto-optic fire alarm according to claim 1, wherein the sound outlet cavity has a height of 3-5 mm and a width of 22-24 mm.

6. The acousto-optic fire alarm according to claim 1, characterized in that the thickness of the top plate of the buzzer cavity is 1-3 mm.

7. The acousto-optic fire alarm according to claim 1, characterised in that the buzzer chamber and the lampshade are movably connected by a buckle.

8. A fire acousto-optic alarm according to claim 1 characterised in that the outer surface of the ceiling of the buzzer chamber is planar.