Abstract: Disclosed is a diamine compound represented by Formula (1), in which R1, R2, R3, R4, R5, X1, X2, X3, X4, m, n, a, b, c, and d are as defined herein. Also disclosed are a method for manufacturing the diamine compound, a composition including the diamine compound having a (chain alkoxy-methylene) phenyl group or a (hydroxyl-methylene) phenyl group, and a polymer including the (chain alkoxy-methylene) phenyl group or the (hydroxyl-methylene) phenyl group.

Abstract: A tripod structure including a plastic-made connecting seat. A bottom end of the connecting seat is formed with three cavities each of which is defined by two lateral securing plates. An angular metal plate is fixed on the outer faces of the two interconnected securing plates. The metal plate is bent to form a left plate and a right plate which are integrally connected with each other and respectively tightly attach to the securing plates. The left and right plates serve to reinforce each other to achieve a good bending strength. Therefore, the securing plates of the connecting seat is able to bear greater lateral force and bending force without deformation. Accordingly, the tripod structure can be stably used without tilting.

Abstract: This invention disclosed an article stand. It includes a tripod having a first leg, a second leg, and a third leg. The article stand further includes two support levers each including an adjustment section and a support section, whereby the space between the support sections and the first and second legs can be changed for receiving different thickness of various kinds of guitars or articles. Also, this support levers can be folded for storage.