Armrest Core Structure for Stopper Pin Load Resistance
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Solution Overview
Problem
Resin-based armrest cores face challenges in providing high load resistance, especially when equipped with a stopper pin, as they tend to lack the necessary strength at the areas around the pin.
Innovation Solution
A resin-based armrest core with a metal stopper pin subjected to insert molding, where the pin protrudes outward and is hooked onto a seat stopper, and a rib is integrally molded inside the core to overlap with the pin's base-end face, enhancing load resistance and preventing the pin from coming off.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a resin-based core is used for the armrest, then the armrest becomes lightweight, but the load resistance at portions around the stopper pin is insufficient
Solution Approach 1:
The invention uses a composite structure combining resin and metal materials. The framed body is made of resin for lightweight properties, while the stopper pin is made of metal for high strength. This composite material approach allows the armrest to be lightweight overall while maintaining high load resistance at critical areas where the metal stopper pin is installed.
Solution Approach 2:
The invention applies different material properties to different parts of the armrest core. The framed body uses resin material for lightweight characteristics, while the stopper pin uses metal material for high strength. This local differentiation of material quality ensures that each component has the optimal properties for its specific function, resolving the contradiction between overall weight reduction and localized strength requirements.
2Strength
If a metal stopper pin is inserted into a resin core, then the pin itself gains high strength, but the pin may come off from the resin body under high loads
Solution Approach 1:
The invention adds a rib structure that extends in a direction perpendicular to the stopper pin's axial direction. This rib protrudes from the framed body and overlaps with the stopper pin, creating a multi-dimensional restraint system. The rib prevents the pin from coming off by providing support in another spatial dimension, complementing the axial insertion of the pin into the resin body.
Solution Approach 2:
The rib is预先 formed as part of the framed body structure before the stopper pin is installed. This preliminary structural element is designed to work together with the stopper pin to prevent come-off. By having the rib in place beforehand, the design ensures that when the pin is inserted, it is immediately restrained in multiple directions, preventing under-loading issues before they occur.
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 solution allows for a lightweight yet strong armrest core that effectively resists high loads by securing the stopper pin with resin and a rib, ensuring the pin remains integral even under heavy loads.
Implementation Method 1
a stopper pin being made of metal, the stopper pin being subjected to insert molding in the framed body
Data Source
AI summary
To provide a core for armrest, the core including a stopper pin for restricting rotation, and exhibiting higher resistance to loads. A core for armrest includes a framed body being made of resin, a stopper pin being made of metal, the stopper pin being subjected to insert molding in the framed body so as to protrude a leading-end side thereof toward an outer side of the framed body, and being hooked onto a stopper of a seat, thereby being restricted from rotating, and a rib being integrally molded onto the framed body inside the framed body, and being disposed so as to overlap with respect to a base-end face of the stopper pin in an axial direction of the stopper pin.