Abstract: Provided with a weight release device capable of being operated in deep sea same as the conventional weight release device without accompanying a mechanical operation at all to avoid troubles of mechanical operation occurred in the conventional weight release device. The weight release device includes a housing fixed to the underwater observation device; a thread made of thermoplastic resin; electric heater portions; a weight support plate; a locking member of the thread made of the thermoplastic resin; and a ring for hanging the weight. The thread made of the thermoplastic resin is arranged from a start point housed in the housing, arranged to pass through the first electric heater portion, locked to the locking member of the thread made of the thermoplastic resin, arranged to pass through the second electric heater portion housed in the housing, and returned to an end point housed in the housing. The ring for hanging the weight is fixed to a lower surface of the weight support plate.

Abstract: A decorative molded body (1) comprises: a transparent layer (10) having an exposed surface (11) and an uneven back surface (12) on an opposite side of the exposed surface (11); a molded layer (50) disposed to face the back surface (12) of the transparent layer (10); a decorative film (30) formed in a predetermined contour shape, disposed to be sandwiched between the back surface (12) of the transparent layer (10) and the molded layer (50), and formed to follow an unevenness of the back surface (12) of the transparent layer (10), the decorative film (30) being visible through the transparent layer (10) from the exposed surface (11) of the transparent layer (10); and a sealing member (60) disposed in a periphery shape on an outer periphery side of the decorative film (30) and burying an outer periphery edge of the decorative film (30).

Abstract: The disclosure provides a method for manufacturing a decorative molded body and a method for manufacturing a processed product using the decorative molded body. The method for manufacturing the decorative molded body includes: a film preparation step of molding a decorative film in a planar shape; a molding preparation step of, in a mold, disposing a transparent layer as an insert and disposing the decorative film of the planar shape; and a film forming step of, while supplying in the mold a material of a molded layer and molding the molded layer, forming the decorative film to follow an unevenness of a back surface of the transparent layer.

Abstract: To provide a method for manufacturing a composite member including an aluminum die cast member and a polymer member firmly bonded by removing a carbide film on the surface of the aluminum die cast member to even the surface layer. The method includes: a melting step of melting a surface layer of a joint surface of the aluminum die cast member by irradiating the joint surface with a laser, the joint surface being joined with the polymer member; and a combining step of integrally molding a polymeric material on the joint surface. The method may have a removal step of removing the carbide film present on the joint surface by irradiating the joint surface with the laser before the melting step, and a modification step of irradiating the joint surface with plasma to impart a hydroxyl group to the joint surface after the melting step.