Abstract: A spool assembly for winding of a sheet-like material thereon includes a tubular hub body and a securing member. The tubular hub body is formed with a groove, and has a radial cross-section that has grooved and non-grooved segments. The non-groove segment extends from the grooved segment, and has opposite first and second ends, and a radial thickness that increases gradually from the first end to the second end thereof. The securing member is mounted in the groove in the tubular hub body for securing a securing end of the flexible sheet-like material to the tubular hub body.

Abstract: A sun screen device includes a support unit, a flexible screen body, a collapsible frame, and a cylinder-and-piston rod assembly. The flexible screen body is secured to the support unit. The collapsible frame is coupled to the support unit and the flexible screen body, and is operable between an extended position to thereby expand the flexible screen body, and a retracted position to thereby contract the flexible screen body. The cylinder-and-piston rod assembly is coupled pivotably to the support unit and the collapsible frame for urging movement of the collapsible frame to the extended position.

Abstract: A curtain track assembly includes a flexible rail made from a resilient polymeric material and including an elongate base portion extending along the length of the rail and having opposite first and second surfaces, and an elongate carrier-hanging portion extending along the length of the rail and protruding from the first surface of the base portion.

Abstract: A sunshielding curtain includes a pressure adhesive sheet unit adapted to be adhered to a glass window and a sunshielding sheet heat-sealed to the adhesive sheet unit. The adhesive sheet unit includes one horizontal row of adhesive subunits each of which has a central portion that is heat-sealed to the shielding sheet. Each of the adhesive subunits is further heat-sealed to the sunshielding sheet along a horizontal seal line which is located at the intermediate portion of the top side of the sunshielding sheet. Two top corners of the top side of the sunshielding sheet are not heat-sealed to the adhesive sheet unit.

Abstract: The sunshielding curtain includes a sunshielding sheet and a pressure sensitive adhesive sheet attached to the sunshielding sheet and having an interior face lying against the sunshielding sheet and an exterior face opposite the interior face. The pressure sensitive adhesive sheet has a plurality of separate concave portions on the exterior face. The interior face is fixed to the sunshielding sheet at positions corresponding to the separated concave portions.

Abstract: An air impermeable bag is provided with a vacuuming unit for vacuuming an internal space of the bag after the latter is hermetically sealed. The vacuuming unit includes a check valve, the position of which is not altered during and after a pumping operation to vacuum the internal space of the bag.

Abstract: A sun shield for vehicles includes a net member which is made of a plurality of interwoven threads and which has a plurality of openings formed among the threads. The threads are interwoven to form at least two layers of overlapped projection portions on the front face of the net member. The projection portions form parallel eaves which are inclined toward a direction with respect to a plane defined by the net member in order to partially shield the openings. Two mounting strips which are made of a plastic cling material with static characteristics are secured to the rear face of the net member.

Abstract: A toy aircraft capable of circling in changeable radius which includes a fuselage and two rudders disposed on the wings, wherein multiple weight-adjusting recesses are longitudinally arranged on a top portion of the fuselage and arranged on upper rear positions of the wings at predetermined intervals, whereby multiple weight-adjusting ball members can be placed in the recesses and the locations or weight of the ball members can be changed to freely adjust the weight and gravitational center of the toy aircraft, at least one of the rudders being slightly inclined, making the shot aircraft fly in a circling pattern with the circling radius changeable.

Abstract: The casing includes a closed bottom, an open top, two long opposed side walls, a short side wall interconnecting the two long opposed side walls and an opening opposite the short side wall. Each of the long opposed walls has an exterior face on which an elongated dovetail projection and dovetail groove are alternately provided. The dovetail projection of one of the long side walls is capable of being received in the dovetail groove of the other long side wall, and vice versa. The short side wall has a top portion higher the height of the long opposed wall from which a pair of resilient tabs extends. Each of the resilient tabs has a round projection extending one opposite the other.

Abstract: A cushion device used in conjunction with a sun visor mounted on an automobile window includes a holding portion having a groove therein and a resilient stand connected to the holding portion.

Abstract: A cleaning device for fish tank includes a hood with a bottom open end and a constricted top open end, a suction pipe connected to the top open end of the hood, and a closed hollow casing for receiving water connected to the bottom open end to close the same. The hollow casing has an opening communicating the interior and exterior of the hood, and a wall defining the opening. The wall is provided with a plurality of spraying holes, and the casing has a top face provided with a plurality of spraying holes. A hollow housing extends beyond the bottom open end and has an interior space which is communicated with the interior of the casing. The hollow housing has a water inlet.

Abstract: A suction cup includes a suction pad which is made of elastic material, and has a peripheral edge and shaped like a bell with a convex face, a lug portion constructed on the convex face and a flat flange portion extending from the peripheral edge. A frame made of elastic material, having a fastening portion and a pressing portion, the fastening portion is attached to the lug portion of the suction pad and the pressing portion attached to flat flange portion of the same. The suction cup further has a strong suction strength and a simple construction.

Abstract: An apparatus for cracking the hull of a melon seed. The apparatus includes a flat plate and a pair of cracking members pivoted to the flat plate. A protrusion projects from the surface at which the cracking members are located. The cracking members have two clamping edges which face each other and are adapted to clamp the tapered end of the melon seed to be cracked while the round end of the melon seed abuts the protrusion by moving the cracking members toward each other. The apparatus is provided with two spring members for urging the cracking members to move away from each other to a position at which the melon seed may be released.