Earmuff Headpiece Bands Sliding Groove Angular Adjustment

The patent applies local quality by varying the transverse thickness of the bands along their length. Specifically, the bands have a first transverse thickness at the coupling block end and a second, smaller transverse thickness at the opposite end. This non-uniform thickness distribution concentrates stress in the middle portion of the bands during use, preventing twisting and distortion while maintaining manufacturing feasibility through controlled thickness variation.

The patent applies dynamics by making the connection between the headpiece and earmuffs adjustable rather than fixed. The connecting devices allow the earmuffs to be detached from the headpiece and reattached as needed. This dynamic connection enables the headpiece and earmuffs to be separately wrapped with fabric coverings when desired, while still allowing convenient assembled storage when not in use.

The patent applies segmentation by dividing the connection system into distinct functional components: coupling blocks for axial connection, sliding grooves for length adjustment, and U-lug connecting devices for securing earmuffs to the headpiece. This segmented design distributes mechanical stresses across multiple specialized connection points rather than relying on a single small fastening member, thereby improving reliability while maintaining reasonable complexity.

The patent applies composite materials by combining different material properties in the earmuff structure. The earmuffs utilize materials and structural designs that provide enhanced structural strength and grasping force compared to conventional designs, enabling positive ear coverage. This is achieved while controlling overall device weight through selective material application in critical load-bearing areas.