Handheld Device Case with Concave Grip and Antislip Surface
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Solution Overview
Problem
Conventional electronic handheld devices used in POS systems face challenges in usability and design for easy gripping, particularly when operating barcode scanners and inputting information with one hand, leading to potential slippage and user fatigue.
Innovation Solution
The design incorporates a longitudinal boxed case with a center trigger key, side trigger keys, and numeric keypads, along with concave portions and antislip finished surfaces, allowing for comfortable grip and reduced slippage, and a bulged portion that fits the palm for enhanced security and impact resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the device is designed with a standard rectangular case shape, then manufacturing is simple and components are easy to assemble, but the device is difficult to grip securely and causes user fatigue during prolonged use
Solution Approach 1:
The patent applies curvature by forming a concave portion on the back surface of the case, which allows the device to conform to the shape of a user's hand. This curved design improves grip comfort and reduces user fatigue during prolonged use, directly addressing the contradiction between ease of operation and device complexity.
Solution Approach 2:
The patent applies local quality by creating a specific concave portion at a predetermined location on the back surface of the case, rather than making the entire case curved. This localized modification provides grip enhancement where needed while keeping the rest of the case structure simple and easy to manufacture.
2Ease of operation
If the device surface is made smooth for easy cleaning and manufacturing, then production is simplified, but the device slips easily in the hand reducing grip security
Solution Approach 1:
The concave portion formed on the back surface creates natural finger placement areas that enhance grip security. The curved geometry provides friction and contact points that prevent slippage while maintaining a relatively simple manufacturing process compared to complex textured surfaces.
3Weight of moving object
If the device is made lightweight for reduced user fatigue, then comfort during prolonged use improves, but structural strength and impact resistance decrease
Solution Approach 1:
The concave portion on the back surface serves dual purposes: it improves grip comfort by conforming to the hand shape while also providing structural reinforcement. The curved geometry distributes impact forces more effectively across the case structure, maintaining strength despite weight reduction.
Solution Approach 2:
The concave portion acts as a built-in cushioning structure that absorbs and distributes impact forces before they can damage internal components. This beforehand cushioning protects the device during drops or impacts while keeping the overall structure lightweight.
Data Source
AI summary
An electronic handheld device includes: a case that is formed in a longitudinal boxed shape; a first operation key that is provided on a front face of the case at a position that is located at an approximate center of the front face; and a first concave portion that is formed on a back face of the case at a first position opposite the position of the first operation key, the first concave portion being arched toward a top end of the case.