A method of manufacturing a toy using a model frame in liquid includes: filling a water tank; dissolving calcium chloride, a powder component, into the water filled in the water tank; wherein the amount of calcium chloride is determined in anticipation of the degree of gelation by chemical action with sodium alginate, filling a liquid paint to the model frame; wherein the liquid paint is comprised water 96 wt. %, CNC 0.99 wt. %, sodium alginate 3 wt. %, luminous material 0.01 wt. % or water 91 wt. %, CNC 1 wt. %, sodium alginate 3 wt. %, shiny material 5 wt. % or water 96 wt. %, CNC 0.99 wt. %, sodium alginate 3 wt. %, color conversion material 0.01 wt. %; immersing the model frame filled with the liquid paint in the water tank; solidifying and shrinking the liquid paint filled in the model frame immersed in the water tank; and shaking the model frame.

The combination of 3D printing technology plus the additional dimension of transformation over time of the printed object is referred to herein as 4D printing technology. Particular arrangements of the additive manufacturing material(s) used in the 3D printing process can create a printed 3D object that transforms over time from a first, printed shape to a second, predetermined shape.

A dartboard structure and a method for manufacturing the dartboard structure are provided. The dartboard structure includes a dartboard body unit, a dartboard frame unit, a first sensor unit and a second sensor unit. The dartboard body unit has a plurality of score regions. The dartboard frame unit has a plurality of through openings that penetrate through the dartboard frame unit, and each of the through openings corresponds to one of the score regions. The second sensor unit and the first sensor unit are in an intersecting arrangement and have a predetermined gap therebetween. The first sensor unit and the second sensor unit surround a plurality of first sensing regions, and each of the first sensing regions corresponds to one of the score regions and one of the through openings.

The combination of 3D printing technology plus the additional dimension of transformation over time of the printed object is referred to herein as 4D printing technology. Particular arrangements of the additive manufacturing material(s) used in the 3D printing process can create a printed 3D object that transforms over time from a first, printed shape to a second, predetermined shape.

Embodiments relate to fabricating a lanyard that includes the assembly of a strap sheet, a fabric strip sheet, and a stopper column. The strap sheet is wrapped around the stopper column and the ends of the strap sheet are adhered to itself to form a closed loop of the lanyard. The inner surface of the strap sheet is attached to the stopper column and the ends of the strap sheet are further attached to the fabric strip sheet to form the assembly. The assembly is cut to obtain multiple lanyards that include a portion of the strap sheet (e.g., a strap), a portion of the fabric strip sheet (e.g., a fabric strip), and a portion of the stopper column (e.g., a stopper). One end of each lanyard can be worn by an individual whereas a second end of the lanyard can be coupled to another structure, such as a handheld controller.

A dartboard structure and a method for manufacturing the dartboard structure are provided. The dartboard structure includes a dartboard body unit, a dartboard frame unit, a first sensor unit and a second sensor unit. The dartboard body unit has a plurality of score regions. The dartboard frame unit has a plurality of through openings that penetrate through the dartboard frame unit, and each of the through openings corresponds to one of the score regions. The second sensor unit and the first sensor unit are in an intersecting arrangement and have a predetermined gap therebetween. The first sensor unit and the second sensor unit surround a plurality of first sensing regions, and each of the first sensing regions corresponds to one of the score regions and one of the through openings.

A material joint connecting an internal spar or baffle to panel walls of inflatable structures. The material joint is formed by a folded center strip and a pair of side strips. The side edges of the center strip are folded to form an initial T-shaped cross-section having a middle section, two side sections formed by a first bend, and two overlapping end sections formed by a second bend. The middle section is fused directly to the facing surface of the panel wall and the overlapping end sections are fused together to extend perpendicularly from the middle section. The end strips overlap the center strip with part of the end strips fused to the side sections of the center strip and part fused directly to the panel wall. The spar or baffle is connected to the fused overlapping end sections of the center strip. Under the internal air pressure of the inflated structure, the side sections bow and arc under tension from the connected spar or baffle and the middle section acts as a bridge to lift and flatten the exterior surface of the panel wall across its width.

A method of manufacturing a toy using a model frame in liquid includes: filling a water tank; dissolving calcium chloride, a powder component, into the water filled in the water tank; wherein the amount of calcium chloride is determined in anticipation of the degree of gelation by chemical action with sodium alginate, filling a liquid paint to the model frame; wherein the liquid paint is comprised water 96 wt. %, CNC 0.99 wt. %, sodium alginate 3 wt. %, luminous material 0.01 wt. % or water 91 wt. %, CNC 1 wt. %, sodium alginate 3 wt. %, shiny material 5 wt. % or water 96 wt. %, CNC 0.99 wt. %, sodium alginate 3 wt. %, color conversion material 0.01 wt. %; immersing the model frame filled with the liquid paint in the water tank; solidifying and shrinking the liquid paint filled in the model frame immersed in the water tank; and shaking the model frame.