Patent ID: 7647717

Claim:
A numerical display device, comprising: a base panel; at least a set of numerical sections, wherein each set contains seven numerical sections provided on said base panel to form a numerical character; a plurality of folding panels pivotally coupling at said base panel to fold between a first position and a second position to selectively change said numerical character, wherein at said first position, said folding panel is pivotally folded on said base panel to fully cover said respective numerical section, and at said second position, said folding panel is pivotally folded at 180° to expose said respective numerical section; and means for retaining each of said folding panels at said first and second positions, wherein said retaining means comprises a plurality of first magnet attracting elements provided at said folding panels respectively and a plurality of second magnet attracting elements spacedly provided at said base panel adjacent to said numerical sections respectively, wherein said first magnet attracting elements are magnetically attracted to said second magnetic elements respectively to retain said folding panels between said first and second positions, wherein each of said first magnet attracting elements is a thin metal strip having magnetic attraction ability and is embedded in said respective folding panel, wherein said second magnet attracting elements are permanent magnets embedded into said base panel.