Armrest Engagement Structure for Easy Mounting and Detachment Resistance
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Solution Overview
Problem
Conventional armrest designs face issues where the accommodation member is easily detached from the frame due to low rigidity, requiring excessive force for mounting when rigidity is high, leading to deteriorated mountability.
Innovation Solution
The armrest design includes a frame with specific engaging portions and an accommodation member with a second engaging portion that is elastically deformable, ensuring the claw and second-to-be-engaged portion overlap, reducing detachment likelihood without increasing rigidity, and featuring a balanced rigidity distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the rigidity of the extending portion is low, then the extending portion can be elastically deformed with a small force at the time of mounting, but an upward pull of the accommodation member easily leads to elastic deformation of the extending portion, causing the claw to be detached from the wire
Solution Approach 1:
The patent changes the geometric parameters of the extending portion, specifically setting its length to 3-7mm and width to 1-3mm, creating an optimized aspect ratio that provides sufficient elasticity for mounting while maintaining adequate rigidity to prevent detachment during use
2Reliability
If the rigidity of the extending portion is high, then the claw can be made less likely to be detached from the wire, but a large force is required for mounting the accommodation member
Solution Approach 1:
The patent optimizes the dimensions of the extending portion (length 3-7mm, width 1-3mm) to achieve the right balance between rigidity and elasticity, avoiding the need for high force during mounting while preventing detachment
3Ease of operation
If the extending portion is made longer to improve elasticity, then mounting becomes easier, but the extending portion becomes more prone to excessive deformation and detachment
Solution Approach 1:
The patent sets the extending portion length to a specific range of 3-7mm, which provides sufficient elasticity for easy mounting while maintaining structural stability to prevent excessive deformation and detachment during normal use
4Stability of the object's composition
If the extending portion is made shorter to improve structural stability, then detachment is reduced, but mounting requires excessive force
Solution Approach 1:
The patent optimizes the extending portion length to 3-7mm, which is sufficiently short to maintain structural stability and prevent detachment, yet sufficiently long to allow elastic deformation with minimal force during mounting
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
This design enhances the mountability and reduces detachment of the accommodation member from the frame, maintaining ease of mounting while ensuring durability and stability.
Implementation Method 1
the extending portion is elastically deformed to the accommodation member side. Thus, the claw passes over the wire and is hooked on the wire
Data Source
AI summary
To provide an armrest that enables suppression of deterioration of the mountability of an accommodation member to a frame and that can make it less likely for the accommodation member to be detached from the frame. A claw of a second engaging portion and a second to-be-engaged portion are opposed to each other in a first direction (the direction of arrows U-D) over an overlap length in a state where an extending portion of the second engaging portion has been brought into contact with an outer peripheral surface of a body portion by elastically deforming the extending portion about a base side from a state where the claw is hooked on the second to-be-engaged portion.