| 摘要 |
PURPOSE: A CRT for preventing a howling sound is provided to prevent internal and external vibration of a CRT by installing a howling prevention part to a shadow mask or an inner shield. CONSTITUTION: A CRT has an electron gun for scanning an electron beam and a main body portion having a predetermined space for scanning the electron beam. The CRT is formed with a panel part(100), a frame(200), an inner shield, a shadow mask(300), and a howling sound prevention part(400). A plurality of plate spring(140) is adhered on an inner circumference of a rectangular panel(120). The frame(200) is installed in an inside of the panel part(100). The inner shield is combined with one side of the frame(200). The inner shield has an incline plane in order to shield an external magnetic field. The shadow mask(300) is installed within the frame(200). The howling prevention portion(400) is formed with a wire(420) and a coil spring(440) in order to absorb the vibration.
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