Press-fit terminal and electronic device including press-fit terminal

A press-fit terminal for being press-fitted and deformed in an insertion hole of an attachment body and electrically connected to a surface conductor of the insertion hole by a reaction force caused by deformation, the press-fit terminal comprising:

• a bar part;
• and
• a deformation part provided at an end portion of the bar part and configured to be deformed in a deformation direction when inserted into the insertion hole, wherein
• the deformation part has a shape expanding at a part between a front end portion of the deformation part and the end portion of the bar part, and
• the deformation part includes:
• a plurality of recesses each provided between the front end portion of the deformation part and the end portion of the bar part, the plurality of recesses being recessed in the deformation direction from a peripheral portion;
• a front boundary portion defining a boundary between each of the plurality of recesses and a surface of the deformation part adjacent to the front end portion of the deformation part, the front boundary portion having a right angle or an obtuse angle with respect to the surface of the deformation part;
• and
• a rear boundary portion defining a boundary between each of the plurality of recesses and the surface of the deformation part adjacent to the end portion of the bar part, the rear boundary portion having a curved surface shape,.
• the deformation part includes a contact region where the deformation part is in contact with the surface conductor when inserted into the insertion hole,
• the contact region includes a maximum width portion of the deformation part having a maximum width in the deformation direction, and
• the front boundary portion is located between the maximum width portion and the end portion of the bar part,
• the deformation part has a first deformation portion and a second deformation portion, the first deformation portion is a half of the deformation part with respect to an insertion axis, the second deformation portion is another half of the deformation part with respect to the insertion axis
• the plurality of recesses are provided by only two recesses,
• the front boundary portion of one of the two recesses is included in the first deformation portion, and
• the front boundary portion of another one of the two recesses is included in the second deformation portion.