Tensioner unit, rocking lever, and tensioner

A tensioner unit comprising:

• a tensioner including a tensioner body having a cylindrical plunger bore with an open end, a cylindrical plunger slidably inserted in the cylindrical plunger bore, and a biasing means that biases the cylindrical plunger outward of the cylindrical plunger bore;
• a rocking lever including a guide surface that makes sliding contact with an endless running transmission member, a rockably supported boss part, and an abutment surface provided on an opposite side from the guide surface for abutment with the cylindrical plunger;
• and
• a protruding part that is provided to the rocking lever near the abutment surface for abutment with the cylindrical plunger and that makes contact with a tip end surface of the tensioner body, wherein
• h and H satisfy the relationship of h<H, where h denotes a protruding amount of a lead part of the cylindrical plunger, where the lead part means a part protruding from the cylindrical plunger bore, from the tip end surface on an opened side of the tensioner body in a state where the cylindrical plunger sits on a bottom of the cylindrical plunger bore of the tensioner body, and
• H denotes an interval (a protruding height) between the abutment surface of the rocking lever and the tip end surface of the tensioner body when the protruding part is brought into contact with the tip end surface of the tensioner body.