| 摘要 |
PURPOSE: An air(life saving) knapsack for a summer travel is provided to put it in packages or books in ordinary times and use the knapsack as a convenient backrest and a life saving device on a travel in the summer by injecting air into the backrest portion. CONSTITUTION: The knapsack is provided with an air bag formed on the front surface of a backrest portion, and is used as a typical knapsack (for storing books or various belongings) in daily life and used as a life saving device for coping with accidents in the swimming season. The knapsack is used for multipurposes including a backrest, a pillow, etc, according to a user's convenience.
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