Feature

●Hand Crank Siren: The sound, universally recognized as an emergency warning, is an effective attention-getter. This siren produces a loud and powerful sound with a range of ¼ mile and beyond.
●High Quality & Compact Design: The housing and handle are made of durable plastic with extra metal support to create a sturdy, yet lightweight structure for portability.
●Convenient & Practical: When the power and traffic are blocked, other mobile alarms cannot enter the alarm area, and the portable hand-crank alarm becomes a very convenient and practical alarm.
●Easy to Carry: The manual siren can be folded and easily packed into a bag as a personal safety tool to scare people away from animals during activities such as camping, hiking and boating, or to signal for help in an emergency.
●Widely Uses: Widely used in factories, schools, military units, flood prevention, natural disasters, open-air military camps, air defense, mountain rescue and seaside anti-ship, forest fire prevention, flood control, fire protection, prisons, reservoirs, ships, mines, plains, pastures, gas stations , airports, forest farms, hotels, hotels and other emergency venues.


Description

    The hand-operated alarm is a hand-operated sounder that does not require power support. It is called differently due to local differences (manual alarm, manual alarm, manual alarm, portable alarm, no power alarm) .
    The utility model comprises a handle, a gear speed increasing mechanism, a clutch slider, a fixed wheel, a sound wheel, a sound window cover, a gear box body and a box frame, wherein the handle is connected with a driving shaft of the gear speed increasing mechanism, and the output shaft of the gear speed increasing mechanism passes The pin is connected to the clutch slider, and the clutch slider is frictionally connected with the flange of the impeller. The purpose is to provide power to the alarm by shaking the handle without the need for power support. The size of the sound depends on the hand speed.
    It is divided into a fixed hand alarm and a portable hand alarm from the style and use.