Lever head

A lever head comprising:

• a holder;
• a stylus support member that extends in a first direction;
• a stylus that is fixed to the stylus support member, and extends in a second direction;
• a first elastic body attaching member that is arranged spaced aside from the stylus support member in the second direction;
• a second elastic body attaching member that is arranged spaced aside from the stylus support member in the second direction, and is arranged spaced aside from the first elastic body attaching member in the first direction;
• a connecting member that connects the first and second elastic body attaching members to fix relative positions of the first and second elastic body attaching members;
• a first elastic body whose one end is fixed to the holder, and whose other end is joined to a first attaching position of the first elastic body attaching member;
• a second elastic body whose one end is joined to a first joining position of the stylus support member, and whose other end is joined to a second attaching position opposed to the first attaching position in the first direction through the first elastic body attaching member;
• a third elastic body whose one end is joined to a second joining position spaced aside from the first joining position of the stylus support member in the first direction, and whose other end is joined to a third attaching position of the second elastic body attaching member;
• a fourth elastic body whose one end is fixed to the holder, and whose other end is joined to a fourth attaching position opposed to the third attaching position in the first direction through the second elastic body attaching member;
• and
• a detector that detects displacement in the first direction of the stylus support member,
• wherein the first to fourth elastic bodies perform lever motion of a single degree of freedom with a third direction perpendicular to the first and second directions being set as an axis.