Eccentric Fastening Mechanism for Pole Grip Straps

The patent changes the geometric parameter of the fastening element by using an eccentric cylinder instead of a traditional screw or wedge. The eccentricity of the cylinder creates a variable radius that provides mechanical advantage during rotation, enabling easy adjustment while maintaining simple structure. The fastening element's shape parameter (eccentricity) is the key change that resolves the contradiction.

The patent applies dynamics by using a rotatable eccentric element that transitions between two dynamic states: a loose state during adjustment where the fastening element can move freely, and a locked state during use where the eccentric geometry prevents unintended movement. The dynamic rotation of the eccentric element provides both adjustability and reliability, resolving the contradiction between these two requirements.

The patent uses asymmetry in the form of an eccentric cylinder where the radius varies asymmetrically during rotation. This asymmetric geometry creates a mechanical lock effect where the strap can be easily adjusted in one direction (when the eccentric element is rotated to increase the radius) but is prevented from moving in the opposite direction (when the eccentric element's geometry blocks movement). This resolves the contradiction by making adjustment easy while preventing unintended changes.

The eccentric fastening element serves multiple functions simultaneously: it provides adjustable positioning, mechanical locking, and resistance to unintended movement all through a single geometric feature. This multi-functionality eliminates the need for separate adjustment mechanisms and locking devices, maintaining design simplicity while achieving high reliability. The single eccentric element performs what would traditionally require multiple components.