PROBLEM TO BE SOLVED: To enable a small-sized structure to achieve a stable suspension of both a hand-shaped slave unit with a hanger part and a grip-push button without any hanger part.SOLUTION: This invention comprises: a protrusion part 10 upright from a plane 50 provided with a plug-in port, having a tapered end shape at its tip end 12 and a cup part 20 that is a cup-shaped member provided at the tip end of the protrusion part 10. A cup-shaped bottom part is continuously arranged at the tip end of the protrusion part 10, having an elasticity capable of reversing outside and inside of the cup-shaped member around the bottom part as a fulcrum and forming recess parts 21 at the edge portion of the cup-shaped member, a hanger part of a hand-shaped slave unit can be hung at the tip end 12 under a state in which the cup part 20 is reversed outside, and a cord of a grip-push button can be held by the cup part 20 by reversing the cup part 20 inside under a state in which the cord is hung at the tip end 12.
