Rotating Body Holding Portion with Elastic Hook for Shaft Attachment
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Solution Overview
Problem
The existing configuration for attaching and detaching a rotating body from a shaft, as seen in JP-2015-140218-A, requires the snap fit portion to be radially expanded and the engagement convex portion to be removed from the recess, making the operation of attachment and detachment cumbersome.
Innovation Solution
A rotating body with a holding portion featuring an elastically deformable hook that can be detachably hooked onto a recess of the shaft, allowing for easier attachment and detachment by rotating over a convex portion outside the recess, enhancing the workability of these operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the snap fit portion is radially expanded and the engagement convex portion is removed from the recess to detach the rotating body, then the attachment and detachment can be achieved, but the workability of attachment and detachment operations deteriorates
Solution Approach 1:
The holding portion is designed to be rotatable relative to the rotating body, transforming the static snap-fit mechanism into a dynamic one. By rotating the holding portion, the engagement convex portion can be easily disengaged from the recess without requiring radial expansion, significantly improving the ease of detachment operation while maintaining reliable attachment function
Solution Approach 2:
The invention introduces rotational movement as a new dimension of operation. Instead of using radial expansion (one-dimensional linear movement) to detach the rotating body, the holding portion rotates (introducing angular/rotational dimension), allowing the engagement convex portion to clear the recess more easily and improving workability
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The enhanced design improves the workability of attaching and detaching the rotating body from the shaft by simplifying the process through the use of a rotatable snap fit portion with hooks that can be easily engaged and disengaged, reducing the operational force required.
Implementation Method 1
The holding portion includes a hook to be elastically deformable and detachably hook on a recess of an end portion of the shaft
Data Source
AI summary
A rotating body to be inserted with a shaft includes a holding portion on an end portion of the rotating body to hold the rotating body on the shaft. The holding portion includes a hook to be elastically deformable and detachably hook on a recess of an end portion of the shaft. The holding portion is rotatingly movable, with elastic deformation of the hook, over a convex portion of the shaft that is outside the recess in an axial direction of the shaft.