deformation in which the curvature radius is expanded occurs in the portion on the protruding distal end 124a side from the curve apex portion 124b of the spring portion 124, then due to the elastic restorative force of the spring portion 124 against the deformation, on the spring rear side of the head plate 125, the pressing force acts in the opposite direction from the pressing force of the head plate 125 against the ferrule 141.
Because of this, in the case of FIG. 37B, it is thought that the pressing force from the rear side of the head plate 125 against the ferrule 141 shows a tendency to become smaller compared with the spring apex portion side due to the elastic restorative force of the spring portion 124.
Inspring portion 124, the overall deformation of the spring portion 124 proceeds smoothly, and a sufficient capability to follow the joining end surface is ensured.
Of the above described types of cleaner which have an insertion portion in which a tape pressing head around which a cleaning tape has been wound is incorporated in the distal end of a protruding portion that protrudes from the tool main body, those having a structure in which the tape pressing head is positioned against the joining end surface of an optical connector inside the positioning housing when the distal end of the insertion portion that is inserted into the positioning housing is positioned within the positioning housing, namely, having a structure in which the insertion portion is plug compatible are widely employed.
For