| 摘要 |
<p>A display frame for changing of multiple pictures used as a picture frame or an advertisement billboard, it comprises in an assembly of a framework, multiple pictures, a grating plate and a movably mounted motor; the pictures and the grating plate are assembled in the framework, a leaf of specific shape cam having segments is driven by the motor to change the positions or angular positions of a picture sheet or the grating plate, thereby effects that the pictures on the grating plate are automatically changed and entirely presented in prolonged times are achieved.</p> |
