A robot joint mechanism includes a fixed base, a turnable portion, a first routing member, and a second routing member. The systems and methods contemplate using more objective data than utilized at present and providing the information in automated manner. Each slide structure includes a pawl that successively engages with teeth in the linear rack as the lift structure of the support assembly is extended upwardly and as the slide structure slides along the linear rack. And It saves more space for other component of the iron as well. hot buttons, of the presentation window to allow for greater interactivity beyond mere playback of the streamed presentation data. Shield plates are bent respectively toward the light-emitting element or the light-receiving element at a predetermined angle with respect to the surface of a die bonding region on the periphery of the die bonding region of the lead frames.