Interlocking Means With Low Sections For Bag Closure

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Solution Overview

Problem

Existing bag interlocking mechanisms fail to easily recognize full interlocking of male and female parts, leading to potential leakage of liquid or powdered contents, and compromise handling characteristics.

Innovation Solution

A bag interlocking mechanism featuring band-shaped members with low sections on the female interlocking part, providing distinct interlocking strengths to ensure secure closure and easy recognition through tactile and auditory feedback, preventing leakage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the interlocking strength between male and female interlocking parts is increased to make full interlocking easily recognizable, then the reliability of interlocking is improved, but the ease of operation deteriorates because it becomes more difficult to interlock the parts

Engineering Contradiction:

Improveinterlocking reliabilityVSAvoidease of interlocking

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The female interlocking part is designed with differentiated local structures: high sections with high interlocking strength for reliable sealing, and low sections with low interlocking strength for easy recognition and operation. This local quality differentiation allows the same interlocking mechanism to provide both strong holding force and tactile feedback for full interlocking recognition.

Inventive Principle:

Principle #3Local quality

2Difficulty of detecting and measuring

If cutout parts are formed in the male interlocking parts to enable tactile recognition of interlocking, then the ease of detecting interlocking status is improved, but the reliability deteriorates because liquid or powdered contents can leak through the cutout parts

Engineering Contradiction:

Improvedetectability of interlocking statusVSAvoidsealing reliability

Core Design Contradiction:

Difficulty of detecting and measuringVSReliability

Solution Approach 1:

Instead of forming cutouts in the male interlocking part (which compromises sealing), the invention inverts the approach by forming low sections in the female interlocking part. The low sections provide tactile feedback for interlocking detection while the male interlocking part remains continuous and intact, maintaining sealing reliability for liquid and powdered contents.

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentUS10806222B2Interlocking means and bag with interlocking means

Publication Date: 2020.10.20 C I TAKIRON CORP

AI summary

An interlocking means including a first interlocking member for which a male interlocking part is provided in a longitudinal direction of a band-shaped first base and a second interlocking member for which a female interlocking part is provided in a longitudinal direction of a band-shaped second base, and in which multiple sections whose heights are low are formed at the female interlocking part at intervals in a longitudinal direction of the female interlocking part, and the male interlocking part and the female interlocking part are interlocked in the low sections in the same manner as in the non-low sections; and a hag with an interlocking means in which the interlocking means is provided.