Surface-mounted ultrathin ceiling sound box without hole

Abstract

The invention relates to a public broadcasting building fire-fighting ceiling loudspeaker. The hole-free surface mounting type ultrathin ceiling sound box comprises an ultrathin box body, a surface mounting device, an active loudspeaker and a passive loudspeaker, the surface mounting device is arranged on the box wall of the side, facing a mounting carrier, of the ultrathin box body during mounting, and the ultrathin box body is mounted on the mounting carrier through the surface mounting device; an active loudspeaker and a passive loudspeaker are respectively arranged in the ultrathin box body, the active loudspeaker is installed on the box wall facing the sound listening space except the box wall on the side in the thickness direction, and the passive loudspeaker is installed on the other box wall except the box wall on the side in the thickness direction. The thickness of the ultrathin ceiling sound box is very small and is only about 30mm, and the ultrathin ceiling sound box is provided with the surface mounting device, so that the ultrathin ceiling sound box can be directly mounted on the surface of a ceiling without forming a hole in the ceiling, the mounting process is reduced, the mounting difficulty and cost are reduced, and the application range is expanded.

Description

technical field [0001] The invention relates to a fire-fighting ceiling loudspeaker of a public broadcasting building, in particular to an ultra-thin ceiling-mounted loudspeaker without opening a hole. Background technique [0002] Ceiling speakers are used for public broadcasting and building fire protection, and are generally installed on indoor suspended ceilings (also known as ceilings, etc.) or concealedly installed on walls. Ceiling speakers of traditional technology are generally more than 80mm in height and cannot be directly surface-mounted. A hole of about 150mm to 200mm must be opened in the ceiling to install the ceiling speaker embedded on the ceiling. These in-ceiling speakers use traditional technology that has been in use for over 50 years. In the "Speaker and Sound Box Design Manual" published by Fujian Science and Technology Press in July 2008, the closed sound box (60-67 pages), the open-type sound box (66-67 pages), the passive radiation sound box (77 pa...

AI Technical Summary

Problems solved by technology

In the "Speaker and Sound Box Design Manual" published by Fujian Science and Technology Press in July 2008, the closed sound box (60-67 pages), the open-type sound box (66-67 pages), the passive radiation sound box (77 pages) are disclosed. ~78 pages); These disclosed prior art loudspeakers, either volume is too big, installation height is too big, or bass sound reproduction effect is not good

The ceiling speaker of the prior art is just a speaker with an installation frame, and its caliber is generally 5.25 inches to 8 inches. It is installed on the ceiling and uses the space of the ceiling as a "cabinet"; And the headroom is either too large or too small to achieve a true speaker cabinet, at best it is an acoustically large baffle; therefore, the sound quality is not good, especially the bass

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