WRITING INSTRUMENT
To provide a writing instrument which is durable and easy to draw.SOLUTION: There is provided a writing instrument 1 including a tip portion 31 protruding from a body portion 2 and an ink member 3 provided with a tail end portion 33 in contact with an ink occluding body 21 in the body portion 2. A t...
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| Format: | Patent |
| Sprache: | eng ; jpn |
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| Zusammenfassung: | To provide a writing instrument which is durable and easy to draw.SOLUTION: There is provided a writing instrument 1 including a tip portion 31 protruding from a body portion 2 and an ink member 3 provided with a tail end portion 33 in contact with an ink occluding body 21 in the body portion 2. A tip surface 32 of the tip portion 31 has a polygonal shape of a five or more vertexes in which the length of each side is different and all internal angles formed by two adjacent sides are right angles or more. Further, the tip surface 32 of the tip portion 31 has a polygonal shape of five or more vertexes in which each vertex is in contact with a circle centered on the axis of the body portion 2.SELECTED DRAWING: Figure 2
【課題】耐久性があり、かつ描きやすい筆記具を提供する。【解決手段】本体部２から先端部３１が突出し、かつ本体部２内のインク吸蔵体２１に尾端部３３が接触して設けられたインク部材３を有する筆記具１であって、先端部３１の先端面３２は、各辺の長さが異なり、かつ隣り合う２辺が作る全ての内角が直角以上となる５角形以上の多角形状である。また、先端部３１の先端面３２は、本体部２の軸を中心とした円に各頂点が接する５角形以上の多角形状である。【選択図】 図２ |
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