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    Small arc tube, low-pressure mercury lamp, lighting apparatus, mandrel for forming the arc tube, and production method of the arc tube
    32.
    发明申请
    Small arc tube, low-pressure mercury lamp, lighting apparatus, mandrel for forming the arc tube, and production method of the arc tube 有权
    小型电弧管，低压汞灯，照明装置，用于形成电弧管的芯棒，以及电弧管的制造方法

    公开(公告)号：US20050077829A1

    公开(公告)日：2005-04-14

    申请号：US10918302

    申请日：2004-08-13

    申请人： Shiro Iida ,  Noriyuki Uchida ,  Tatsuhiro Yabuki

    发明人： Shiro Iida ,  Noriyuki Uchida ,  Tatsuhiro Yabuki

    IPC分类号： F21S4/00 ,  F21S8/06 ,  F21Y103/02 ,  H01J9/00 ,  H01J9/24 ,  H01J17/16 ,  H01J61/30 ,  H01J61/32 ,  H01J61/72

    CPC分类号： H01J61/72 ,  H01J9/247 ,  H01J61/327

    摘要： A mandrel has a main body having a substantially-cone-shape. The main body has, on its circumferential surface, a spiral-shaped groove at which the glass tube to be wound is held. The groove, in cross section, has a contact range in which the glass tube's circumferential surface is in contact. One end of the contact range corresponds to a circumference part of the glass tube in wound state which is closest to the axis of the main body of the mandrel, a part of the groove that extends from the circumference part towards the apex of the main body is parallel to the axis of the mandrel, and the pitch of the groove in the axial direction of the mandrel is formed smaller than the outer diameter of the glass tube. The glass tube wound on the mandrel is easily removed from the main body by lowering the mandrel. In the arc tube formed in such a way, any two glass tube portions, which are adjacent to each other in the axial direction of the arc tube, overlap with each other.

    摘要翻译： 心轴具有大致锥形的主体。 主体在其圆周表面上具有螺旋状的凹槽，待缠绕的玻璃管保持在其上。 该槽的横截面具有玻璃管的周面接触的接触范围。 接触范围的一端对应于最接近芯棒主体轴线的缠绕状态下的玻璃管的圆周部分，从圆周部朝向主体的顶点延伸的一部分槽 平行于心轴的轴线，并且凹槽在心轴的轴向上的间距形成为小于玻璃管的外径。 缠绕在心轴上的玻璃管通过降低心轴而容易地从主体移除。 在以这种方式形成的电弧管中，在电弧管的轴向上彼此相邻的任何两个玻璃管部彼此重叠。