| 摘要 |
PURPOSE:To perform an electric conduction test without trouble by forming a checker pin which can be inserted into a through hole and is different in the sectional shape from that of the through hole while being smooth in the contact therewith. CONSTITUTION:A checker pin 1 is so formed as to be insertable into a through hole formed in a circuit to be tested, triangular in the sectional shape and smooth in the contact with corners thereof 3 by removing angularity at contact parts. When the checker pin 1 is inserted into the through hole 3, the contact area therebetween is so limited to prevent such a trouble as drifting of the checker pin 1 without contact with the through hole 3 due to any dirt, ink attached during the mark printing or the like 4 covering from the surface of a land 2 to the corners thereby ensuring an electric conduction test without trouble. |
