An orthopedic device for improving posture while sitting, having a foundation member including a front portion for upper legs and a bowl portion for lower pelvic area. An ion source generates an ion beam along a beam path. To prevent irregularities in the support surface from accidentally lifting the pin away from the towline, the pin is attached to the cart through a structure that also permits the cart to move freely relative to the pin but maintain the pin engaged with the towline. Each end includes a ball shaped handle. As a result, a chip size of the semiconductor integrated circuit with a debug function may be reduced. The light source is arranged by employing a plurality of laser diode modules, the optical power of which is higher than, or equal to 300 mW.