Hinge Device Elastic Shaft Bearing Friction Click Feeling
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Solution Overview
Problem
Existing hinge devices for vehicle console boxes suffer from a loss of 'click feeling' over time due to abrasion and poor sliding resistance between the shaft and bearing parts, primarily because the bearing part's diameter is larger than the shaft part's, leading to inadequate support and friction.
Innovation Solution
A hinge device design featuring a shaft part with a protruding part and a bearing part with an insert hole, where the outer peripheral surface of the protruding part and the inner peripheral surface of the insert hole have axial plane parts, and at least one of them has elasticity, allowing for improved frictional force and sustained 'click feeling' through precise diameter differences and elastic deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the bearing part has a larger diameter than the shaft part, then the structural stability is improved, but the sliding resistance between the bearing part and shaft part deteriorates
Solution Approach 1:
The invention applies local quality by creating a localized elastic deformation zone at the contact interface between the shaft part and bearing part. The elastic component is positioned specifically at the region where sliding resistance is needed, allowing the bearing part to have a larger overall diameter for stability while the localized elastic zone provides the necessary friction and sliding resistance.
2Ease of operation
If the projections are fitted to the recesses to provide click feeling, then the user feedback is improved, but the click feeling deteriorates over time due to abrasion
Solution Approach 1:
The invention changes the material parameter by introducing an elastic component that deforms elastically during the engagement of the protrusion with the recess. This elastic deformation provides the click feeling while the elastic material's resistance to wear and abrasion ensures the click feeling persists over time, overcoming the deterioration issue of conventional plastic-to-plastic contact.
3Ease of operation
If the diameter of the circumscribed circle of the protruding part is made larger than the inscribed circle of the insert hole, then the click feeling is improved, but the manufacturing precision requirement increases
Solution Approach 1:
The invention changes the geometric parameter by allowing the circumscribed circle diameter of the protruding part to be larger than the inscribed circle diameter of the insert hole. This parameter change enhances the click feeling by improving the engagement geometry. The elastic deformation capability compensates for the increased dimensional tolerance requirements, making the manufacturing process more feasible while maintaining the improved click feeling.
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 design provides a stable and prolonged 'click feeling' and enhanced frictional force between the shaft and bearing parts, ensuring reliable operation and resistance to opening and closing forces.
Implementation Method 1
at least one of the protruding part and the insert hole has an elasticity
Data Source
AI summary
According to an aspect of the present invention, a hinge device includes: a shaft part having a protruding part; and a bearing part having an insert hole into which the protruding part is inserted. A first plane part is formed on an outer peripheral surface of the protruding part so as to extend in an axial direction thereof. A second plane part is formed on an inner peripheral surface of the insert hole so as to extend in an axial direction thereof. A diameter of a circumscribed circle defined on an sectional outer periphery of the protruding part in the axial direction thereof is larger than a diameter of an inscribed circle defined on a sectional inner periphery of the insert hole in the axial direction thereof. And, at least one of the protruding part and the insert hole has an elasticity.