| 摘要 |
PROBLEM TO BE SOLVED: To reduce toppling of a beverage container when the beverage container placed on a table is moved to escape by an unexpected touch of the hand and the elbow, and to lessen the friction between a paper sheet and the hand during writing work. SOLUTION: A plurality of rotatable spherical bodies are disposed at equal spaces on the lower part of a coaster on which the beverage container is placed. Thus, the beverage container can be moved to slide on the table. When the beverage container is unexpectedly touched by the hand or the elbow, it is moved to escape so that toppling can be reduced. In writing work, the hand is put on the coaster provided with the rotatable spherical bodies, and the friction between the hand and a paper sheet can be eliminated. COPYRIGHT: (C)2009,JPO&INPIT
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