Patent ID: 7992847
Filing Date: 2011-08-09
Classification: E04H,F16F

Abstract:
1. An earthquake-proof plinth comprising a display floor plate having an aperture dimensioned and shaped to fit a middle section of an article seated on the plinth, the aperture having a vertical axis; a seat panel having a horizontal orientation and moveable vertically in the aperture along the vertical axis of the aperture, wherein the seat panel maintains the horizontal orientation as it moves vertically in the aperture, whereby an article seated on the seat panel remains seated on the seat panel as the seat panel moves vertically in the aperture; a shaft extending vertically downward from and supporting the seat panel, wherein the shaft is moveable vertically between a normal position in which the seat panel is flush with the display floor plate and a dropped position in which the seat panel is dropped below the display floor plate while maintaining its horizontal orientation; a vibration sensor for detecting vibrations; a shaft stopper for stopping the seat panel and shaft in a shock-absorbing elastic fashion at a predetermined position at which the middle section of an article seated on the seat panel is fitted in the aperture of the floor plate; and a retainer that normally retains the shaft in the normal position to keep the seat panel flush with the display floor plate and that releases the shaft in response to a vibration detection signal from the vibration sensor to let the seat panel and shaft drop.