Door Striker Inversion for Extended Adjustment Tolerance

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Solution Overview

Problem

Conventional door striker attaching structures face challenges in securing sufficient adjustment allowance due to manufacturing tolerances, leading to reduced mounting strength when trying to maintain the conventional central distance of elongated holes.

Innovation Solution

A door striker attaching structure with a base plate and rod support portions, where the door striker is inverted along a center line to bias the rod support centers, allowing for twice the adjustment allowance of conventional systems while maintaining the original central distance of the fastening holes, and is asymmetrically shaped for easy identification of attachment states.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the central distance of the elongated hole is increased to secure a larger adjustment allowance, then the adjustment allowance is improved, but the mounting strength of the door striker decreases

Engineering Contradiction:

Improveadjustment allowanceVSAvoidmounting strength

Core Design Contradiction:

Adaptability or versatilityVSStrength

Solution Approach 1:

The door striker is configured to be attached in an inverted manner, where the rod support portions are positioned to utilize the full extent of the elongated hole's adjustment range. By inverting the attachment orientation and utilizing the asymmetric outer shape of the base plate, the design achieves twice the conventional adjustment allowance while keeping the hole dimensions and mounting strength unchanged.

Inventive Principle:

Principle #13The other way round (Inversion)

2Device complexity

If the door striker is attached in a conventional symmetric manner, then the mounting structure is simple, but the adjustment allowance is insufficient to deal with manufacturing tolerances

Engineering Contradiction:

Improvemounting structure simplicityVSAvoidadjustment allowance

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The base plate is designed with an asymmetric outer shape with respect to the second center line, while maintaining symmetry with respect to the first center line. This asymmetric configuration enables the door striker to be attached in an inverted manner, providing twice the adjustment allowance of conventional symmetric designs without complicating the overall mounting structure.

Inventive Principle:

Principle #4Asymmetry

Data Source

PatentUS11608663B2Door striker attaching structure and utility vehicle including the same

Publication Date: 2023.03.21 KAWASAKI MOTORS LTD

AI summary

In a door striker attaching structure, a door striker includes a rod and a base plate, in which the base plate includes rod support portions to which the rod is connected, and a pair of fastening portions through which the base plate is fastened to a vehicle body of a utility vehicle. The vehicle body is provided with fastening holes to which the fastening portions are fastened, and each of the fastening holes is an elongated hole having two central portions. The door striker is symmetric with respect to a first center line that connects centers of the fastening portions, and by inverting the door striker along the first center line, a second center line that connects centers of the rod support portions is biased in a direction along the first center line by a distance equal to a central distance between the central portions of the fastening holes.