| 摘要 |
PURPOSE:To simplify a device, to achieve a cost down, and simultaneously, to improve the appearance of a family Buddhist altar by pivoting a turning arm at a turning point located on the bisector of a segment to connect the pivot points of a close door condition and an open door condition, and simultaneously, linking the turning arm to a motor so as to be reciprocating-vibratable. CONSTITUTION:To an external door piece 5, a supporting piece 14 to be extended towards an internal door piece 4 is fixed to, for example, the upper flange, one edge of a turning arm 6 is pivoted to a pivot point K2 provided at the head part of the said supporting piece 14, and a supporting shaft 10 to horizontally turn the said turning arm 6 around a turning point K3 is provided to the other edge. The said turning point K3 is located on a vertical bisector X2 of a segment X1 to connect a pivot point K21 in a close door condition Y1 and a pivot point K22 in an open door condition Y2, respective links L0, L1, L2 and L3 to form a quadric crank chain are formed in unequal lengths, and thereby, the external door piece 5 on the extension of the second link L2 can be opened and closed under respective opening actions between the close door and open door conditions Y1 and Y2 along with the internal door piece 4 composed of the third link L3. |
