Button Battery Blister Pack with High-Strength Reinforcing Foil
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Solution Overview
Problem
Existing blister packs for button batteries are not secure against accidental opening by children, as they can be easily torn or manipulated, leading to potential swallowing of the batteries, and they occupy more space due to reinforcing ribs.
Innovation Solution
A blister pack design featuring a reinforcing foil with high tensile strength between 1,200 kg/cm2 and 3,100 kg/cm2, covering the base and blister foil edges, making it impossible to access the battery without a tool, and eliminating the need for reinforcing ribs, allowing for flat stacking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a flexible foil base is used for the blister pack, then the pack is easy to open by children, but the pack lacks structural integrity and requires reinforcing ribs
Solution Approach 1:
The patent changes the material parameter of the base from flexible foil to rigid card material, fundamentally altering the mechanical properties to prevent easy opening by children while maintaining structural integrity without requiring external reinforcing ribs
Solution Approach 2:
The patent removes the reinforcing ribs that were previously necessary when using flexible foil bases, simplifying the overall structure by eliminating components that are no longer needed when using rigid card material
2Strength
If reinforcing ribs are added to the blister pack, then the pack gains structural strength, but the pack occupies more space and cannot be flatly stacked
Solution Approach 1:
The patent eliminates reinforcing ribs from the design by using rigid card material that inherently provides structural strength, thereby removing the volume-consuming elements and enabling flat stacking of packs
Solution Approach 2:
The patent uses composite construction with rigid card base, aluminum foil sealing layer, and plastic blister housing to achieve structural strength without requiring additional reinforcing ribs, allowing compact flat stacking
3Ease of operation
If precut weakened lines are added to the card base, then the battery can be easily extracted, but the card can be easily torn and accidentally opened by children
Solution Approach 1:
The patent removes precut weakened lines from the card base design, eliminating the vulnerability to tearing and accidental opening by children while maintaining controlled access mechanisms
Solution Approach 2:
The patent segments the opening mechanism into controlled portions where sealing edges are separated from the main card body through defined separation lines, allowing intentional opening while preventing accidental tearing
Data Source
AI summary
The invention relates to a blister pack (1) for a button battery, comprising a blister foil (4) designed to form at least one housing for receiving at least one button battery, and integral with a base (2). According to the invention, the blister pack comprises, between the base (2) and the blister foil (4), a reinforcing foil (6) which has inter alia a tensile strength of between 1,200 kg/cm2 and 3,100 kg/cm2according to the ASTM D 882 standard. Moreover, an orifice opening into the hosung is provided.