Patent ID: 7661996

Claim:
An electrical connection terminal for a connection hole, comprising: a base-side end portion having a predetermined width; a retaining portion having an increasing width wider than the predetermined width of said base-side end portion, said retaining portion being formed integrally said the base-side end portion; an insertion taper portion having a decreasing width narrower than the increasing width of said retaining portion to reach a leading end portion, said insertion taper portion being formed integrally with said retaining portion; wherein said insertion taper portion is composed of a plurality of taper portions taper angles of which change so as to increase along an insertion direction, and a lead insertion angle θ of said insertion taper portion is designed from W=P×μ×tan θ, and P=b×d3×E×Y/4×L3 so that an insertion force is less than a predetermined force where W is said insertion force (N), P is a deflection load (N/mm), μ is a coefficient of friction, b is a thickness (mm) of said lead, d is a width (mm) of said lead, E is a Young's modulus (N/mm2), Y (Yn: a maximum amount of deflection) is an amount (mm) of deflection at a lead abutment point, and L is a dimension (mm) from a package to a lead abutment point.