From what I understand of it, if there's not a "release button" it's not a switchblade because it's not automatic. An automatic stores energy and instantly opens the knife after that energy is released. An assisted opener is just that, it uses leverage/gearing to make the opening easier and faster, but the user still has to apply force throughout the open. If your assisted opener is spring loaded or otherwise opens with an instant release, you may be treading on thin ice.