| 摘要 |
<p>[Problem] A person's ability to concentrate while studying normally decreases over time. However, there has been no development of a practical and specific method whereby a stimulus for counteracting sleepiness can be actively imparted, i.e. a writing tool whereby an effective stimulus is imparted to part of the human body. [Solution] A writing tool used as a stationery product, wherein the writing tool produces a wakeful effect and the writing tool is characterized in having stimulating protuberances on the grip.</p> |
