Plastic Bottle Hand-Grip Ribs for Slippage Prevention
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Solution Overview
Problem
Existing plastic bottle-shaped containers with integrated pinch-grip handles suffer from slippage issues, especially when filled, due to weak rigidity and are not suitable for large filling volumes, such as 2 litres or more.
Innovation Solution
A plastic container design featuring a moulded hand-grip with a palm-recess and two opposite finger-recesses, where the finger-recesses extend from the bottom of the palm-recess and include reinforcing ribs to enhance grip and prevent slipping, achieved through injection-stretch blow moulding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If an integrated pinch-grip handle is provided with two opposite recesses in the sidewalls, then the manufacturing cost is reduced and manufacturing complexity is simplified, but the rigidity of the hand grip becomes weak and the container tends to slip from the user's hand
Solution Approach 1:
The hand grip is segmented into three functional zones: a palm recess for palm placement, two finger recesses for finger insertion, and multiple reinforcing ribs extending into the finger recesses. This segmentation allows each zone to perform its specific function while maintaining overall structural integrity and rigidity.
Solution Approach 2:
The bottom of the palm recess is made convex rather than flat, creating a localized quality change that provides better palm support and increases rigidity in the critical load-bearing area without requiring additional materials or complex manufacturing.
2Device complexity
If an integrated pinch-grip handle is provided with two opposite recesses in the sidewalls, then the manufacturing process is simplified, but the container becomes unsuitable for large filling volumes of 2 litres or more
Solution Approach 1:
The hand grip structure is divided into distinct functional segments including a palm recess for secure palm placement, two finger recesses for finger insertion, and multiple reinforcing ribs. This segmentation provides the ergonomic support needed for heavy containers while maintaining a simple integrated manufacturing process.
Solution Approach 2:
The hand grip extends vertically along the container body rather than being a simple horizontal feature. The palm recess and finger recesses are positioned at different vertical levels, creating a three-dimensional gripping structure that provides leverage and control for heavy containers without increasing manufacturing complexity.
3Ease of manufacture
If a simple integrated handle with two opposite recesses is used, then the manufacturing cost is reduced, but the friction between the user's hand and the container is insufficient causing slippage
Solution Approach 1:
The hand grip is segmented into a palm recess for palm placement and two finger recesses for finger insertion, with multiple reinforcing ribs extending into the finger recesses. This segmentation creates multiple contact points that increase friction and prevent slippage while maintaining a cost-effective integrated manufacturing process.
Solution Approach 2:
The bottom of the palm recess is made convex rather than flat, creating a curved surface that better conforms to the palm's natural shape. This curvature increases the contact area and friction between the user's hand and the container, preventing slippage without adding manufacturing complexity.
Data Source
Figure 1~2
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Figure 6~7
AI summary
The bottle-shaped plastic container (1) comprises a hollow body with an integrated hand-grip (2). The said hand-grip (2) is constituted by a palm-recess (20) and two opposite finger-recesses (21) ; said palm-recess (20) has preferably a depth of at least 5mm ; said two opposite finger-recesses are an extension of the bottom (202) of said palm-recess (20), and the bottom (202) of said palm-recess (20) comprising ribs (23) that extend in the finger-recesses (21).