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    • 1. 发明申请
    • BALLPOINT PEN TIP
    • BALLPOINT笔尖
    • US20080199243A1
    • 2008-08-21
    • US11753110
    • 2007-05-24
    • Myeong-Ki KIMHak Jae KIM
    • Myeong-Ki KIMHak Jae KIM
    • B43K7/00
    • B43K1/086
    • In order that pressure is always applied to a center part of a ball and ink flows smoothly, a ballpoint pen tip according to an exemplary embodiment of the invention includes: a ball that has a diameter of 0.7 mm or more; a tip main body that has a ball holder formed at a front end thereof so as to support the ball to be rotatable while a portion of the ball is exposed to the outside; an ink outflow gap provided within the center thereof so as to connect the ball holder and an ink storage area, which is assembled to an end portion of an end opposite to the front end; an elastic member that includes a center elastic portion that has a spiral shape, is formed in the ink outflow gap, and constantly applies force to the ball in a direction where the ball is exposed; a rear contact portion that is integrally formed with the center elastic portion at an end portion opposite to the front end of the tip main body and is supported by a support protrusion protruding toward the inside of the ink outflow gap so as not to be separated; a front contact portion that has one end portion integrally formed with the center elastic portion toward the front end of the tip main body and a linear pressing portion coming into contact with the ball at the other end portion; and a separation preventing protrusion that protrudes along an inner circumference of an end portion of the ink outflow gap toward the ball holder such that an end portion of the pressing portion of the elastic member is in contact with a center part of the ball.
    • 为了将压力总是施加到球的中心部分,油墨顺利地流动,根据本发明的示例性实施例的圆珠笔笔尖包括:具有0.7mm或更大直径的球; 尖端主体,其具有形成在其前端的球保持件,以便在球的一部分暴露于外部的同时支撑球可旋转; 设置在其中心内的墨水流出间隙,以连接球保持器和墨水存储区域,该墨水存储区域组装到与前端相对的端部的端部; 包括具有螺旋形状的中心弹性部分的弹性构件形成在墨水流出间隙中,并且在球被暴露的方向上不断地向球体施加力; 后接触部分,其在与所述末端主体的前端相对的端部处与所述中心弹性部分一体地形成,并且被支撑突起支撑,所述支撑突起朝向所述墨水流出间隙的内部突出以便不被分离; 前接触部分,其一端部与所述中心弹性部分一体地形成在所述末端主体的前端;以及直线按压部分,其在所述另一端部与所述球接触; 以及分离防止突起,其沿着墨水流出间隙的端部的内周朝向球保持器突出,使得弹性构件的按压部分的端部与球的中心部分接触。