A Cell Broadcasting System

Abstract

The invention discloses a cell broadcast system, which comprises a signal input device, a frequency conversion modulator, a transmitter, a broadcast terminal and a protection cover, wherein the broadcast terminal comprises a sound box, the sound box is arranged on a wall, the sound box comprises a shell, an opening is arranged in the shell, and a horn is arranged at the opening; the upper end of the protection cover is connected onto the wall in a rotary mode; the left side and the right side, located at the upper part of the protection cover, on the wall are provided with motors; a pulling wire is wound on the output shaft of the motor; the other end of the pulling wire is connected with the top part of the protection cover; the top part of the shell is provided with a fan; the fan comprises a casing and fan blades; the casing is tightly matched with the shell; the inner circle of the bottom of the casing is provided with a circle of groove; a through hole is arranged in the bottom of the groove; the through hole is connected with one end of a cooling pipe; the cooling pipe passes across the horn and then passes out of the bottom of the shell; and the bottom of the shell is provided with a first airflow valve.

Description

technical field [0001] The present invention relates to the technical field of broadcasting, in particular to a cell broadcasting system. Background technique [0002] As the main part of the terminal of the community broadcasting system, the speaker is often exposed to the outdoors for many years. Therefore, the waterproof of the speaker becomes particularly important. The waterproofing of the speaker is also very simple. We can make the shell of the speaker fully enclosed, which is not difficult to achieve technically. But in this case, it will cause poor heat dissipation of the speaker. Therefore, waterproofing and heat dissipation are a pair of contradictions. How to ensure waterproofing while ensuring heat dissipation is a problem to be solved by the present invention. In addition, the broadcasting terminal is also easily damaged, especially naughty children, often use slingshots to play Speakers, so how to prevent the broadcast terminal from being damaged is also a ...

AI Technical Summary

Problems solved by technology

But in this case, it will cause poor heat dissipation of the speaker.

Therefore, waterproofing and heat dissipation are a pair of contradictions. How to ensure waterproofing while ensuring heat dissipation is a problem to be solved by the present invention. In addition, the broadcasting terminal is also easily damaged, especially naughty children, often use slingshots to play Speakers, so how to prevent the broadcast terminal from being damaged is also a difficult problem

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