Strap bar device of strap accessory

A strap bar device comprising:

• a strap accessory including:
• a first support part having a through-hole extending therethrough, and
• a second support part spaced apart from the first support part, the second support part including:
• a first surface facing the first support part and including a support groove aligned with the through-hole, and
• a second surface opposite to the first surface, wherein the support groove has a closed bottom that does not penetrate the second surface;
• and
• a strap bar inserted through the through-hole and supported by the through-hole and the support groove, without penetrating the second support part, wherein the strap bar includes:
• a head part larger than the through-hole,
• a recess formed on an outer surface of the strap bar adjacent to the head part, and
• a hook piece elastically extending from the head part over the recess and positioned within the recess along a longitudinal direction of the strap bar, wherein the hook piece passes through the through-hole of the first support part and engages a portion of the first support part, which faces the first surface of the second support part when the strap bar is fully coupled to the first support part,
• wherein a strap is connected to the strap bar.