Patent ID: 7559773

Claim:
An electrical connecting apparatus comprising: a board having first, second, third, and fourth mounting portion groups each including a plurality of mounting portions spaced from one another in a front-back direction and arranged on a lower surface of said board such that said mounting portions in each of said mounting portion group are displaced in a left-right direction from said mounting portions in the other of said mounting portion groups; and first, second, third, and fourth contactor groups each including a plurality of plate-shaped contactors in which said contactors in said first, second, third, and fourth contactor groups respectively correspond to said mounting portions in said first, second, third, and fourth mounting portion groups and are mounted to corresponding mounting portions in a cantilevered manner in a state of extending from said corresponding mounting portions in the same direction, and in which the mounting positions to said board are displaced in said left-right direction, wherein each said contactor has a seat portion mounted on said corresponding mounting portion at the upper end portion, an arm portion extending in said left-right direction from the lower end of said seat portion, and a probe tip portion extending downward from the tip end portion of said arm portion and having a probe tip at the lower end, wherein said contactors in said first, second, third, and fourth contactor groups are identical in terms of the height positions of said probe tips but are different from one another in terms of the shapes of said seat portions, and wherein the height positions of said arm portions of said contactors in said first contactor group are different from the height positions of said arm portions of said contactors in at least said third and fourth contactor groups.