公开(公告)号：US06380841B2

公开(公告)日：2002-04-30

申请号：US09754427

申请日：2001-01-04

申请人： Fumitoshi Masuda ,  Shigeki Takahashi ,  Toru Ogata ,  Tomohisa Ogawa ,  Minoru Yamaguchi ,  Yutaka Kitamura

发明人： Fumitoshi Masuda ,  Shigeki Takahashi ,  Toru Ogata ,  Tomohisa Ogawa ,  Minoru Yamaguchi ,  Yutaka Kitamura

IPC分类号： H01C1032

CPC分类号： H01C10/32

摘要： A variable resistor is constructed to reliably seal the space between a rotor and a substrate without insert-molding the substrate into a case, and to be produced at a very low cost. This variable resistor includes a hollow square-prism shaped case which is open at the top and the bottom, a substrate which is fitted into the lower opening of the case, and on the top surface of which a collector electrode and an arcuate resistor are provided, a rotor rotatably fitted into the upper opening of the case, a slider mounted on the bottom surface of the rotor and making sliding contact with the collector electrode and the resistor, an annular packing member disposed between the rotor and the substrate for sealing the space therebetween, terminals mounted on the substrate and electrically connected to the resistor and the collector electrode, and a metallic cover.

公开(公告)号：US4821015A

公开(公告)日：1989-04-11

申请号：US128913

申请日：1987-12-04

申请人： Kenji Matsui ,  Toshi Numata ,  Yukinori Ueda ,  Tomohisa Ogawa ,  Kiyoshi Ito

发明人： Kenji Matsui ,  Toshi Numata ,  Yukinori Ueda ,  Tomohisa Ogawa ,  Kiyoshi Ito

IPC分类号： H01C1/144 ,  H01C10/00 ,  H01C10/34

CPC分类号： H01C10/005 ,  H01C1/144

摘要： A variable resistor of a type for mounting against the surface of a printed circuit substrate, the variable resistor having:an insulating substrate having one surface for supporting a resistor and an opposite surface for being positioned against the surface of a printed circuit substrate;a curved resistor on the one surface of the insulating substrate and having opposite ends;a sliding member rotatably mounted on the insulating substrate and sliding on the resistor;a plurality of outside electrodes on the insulating substrate, one for each end of the curved resistor, and extending from the corresponding end of the resistor along the one surface of the insulating substrate, along an edge of the insulating substrate, and along the opposite surface of the insulating substrate, each outside electrode having a three layer structure constituted by a lower layer against the insulating substrate, a middle layer and an outer layer, the lower layer being an electrically conductive material suitable for plating, the middle layer being a plating material having the capability to improve the heat resisting characteristics of solder by acting as a barrier to migration of the material of the lower layer into the outer layer, and the outer layer being a material having superior soldering characteristics.

摘要翻译： 一种用于安装在印刷电路基板的表面上的可变电阻器，所述可变电阻器具有：具有用于支撑电阻器的一个表面的绝缘基板和用于抵靠印刷电路基板的表面定位的相对表面; 在绝缘基板的一个表面上具有相对端的弯曲电阻器; 滑动构件可旋转地安装在绝缘基板上并在电阻器上滑动; 绝缘基板上的多个外部电极，一个用于弯曲电阻器的每一端，并且沿着绝缘基板的一个表面沿着绝缘基板的一个表面从电阻器的相应端延伸，并且沿着相对的表面 每个外部电极具有由绝缘基板的下层构成的三层结构，中间层和外层，下层是适合镀覆的导电材料，中间层是电镀材料 具有通过作为下层材料向外层迁移的障碍而提高焊料的耐热特性的能力，外层是具有优异焊接特性的材料。