| 摘要 |
A baby rattle is made up of a light-transparent shell, a light source in the interior of the shell, an impact or motion-sensing member within the shell will generate an electrical signal to activate a control circuit between the light source and a portable power source to illuminate the shell. The impact motion-sensing member is preferably a piezoelectric crystal mounted within the shell, and a fiber optic array within the shell can be used in association with a light source to create different lighted displays.
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