Press-fit terminal and connection structure of press-fit terminal

A press-fit terminal configured to be press-fitted into a through hole of a substrate in an axial direction, the press-fit terminal comprising:

• a tip portion;
• an elastic portion;
• and a body portion in this order from a front end side in the axial direction, wherein
• the elastic portion includes a pair of beam portions opposed to each other with an eyehole interposed therebetween in a width direction orthogonal to the axial direction, and configured to apply elastic reaction force to an inner circumferential surface of the through hole,
• the pair of beam portions each include a front beam portion extending continuously with the tip portion on the front end side in the axial direction, a rear beam portion extending continuously with the body portion on a rear end side in the axial direction, and a press-fitted portion located between the front beam portion and the rear beam portion with respect to the axial direction,
• the front beam portion includes, at an outer side end in the width direction, a front inclined portion linearly inclined outward in the width direction from the tip portion side toward the press-fitted portion,
• the rear beam portion includes, at an outer side end in the width direction, a rear inclined portion linearly inclined outward in the width direction from the body portion side toward the press-fitted portion,
• an acute inclination angle of the rear inclined portion in the axial direction is larger than an acute inclination angle of the front inclined portion in the axial direction,
• a length of the rear inclined portion in the axial direction is shorter than a length of the front inclined portion in the axial direction,
• the front inclined portion includes, forward of the front end of the eyehole in the axial direction, a contact start area configured to first come into contact with an opening end portion of the through hole during press-fitting into the through hole,
• a peripheral edge of the eyehole includes a front hole end portion expanding outward in the width direction and rearward from the front end of the eyehole in the axial direction, and a rear hole end portion expanding outward in the width direction and forward from the rear end of the eyehole in the axial direction, and
• an R of the rear hole end portion is smaller than an R of the front hole end portion.