Zipper Pull Torsional Spring Assembly Mechanism

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Solution Overview

Problem

Existing zipper pulls have low efficiency in assembling a new pull tab, as the process requires pressing a movable plate, which is difficult and time-consuming due to their small size and closed ring structure.

Innovation Solution

A zipper pull design featuring an upper and lower wing plate with a pull nose and a limiting block connected via a torsional spring shaft, allowing for easy replacement and assembly of a new pull tab by rotating the limiting block inward using the spring force.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a closed ring structure pull nose is used, then the zipper pull maintains structural integrity, but the pull tab cannot be replaced after breaking

Engineering Contradiction:

Improvestructural integrityVSAvoidpull tab replaceability

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The pull nose is divided into a fixed portion and a movable limiting block portion. The limiting block can rotate relative to the pull nose body through a torsion spring mechanism, creating a segmented structure that allows the pull tab to be released and replaced while maintaining the overall integrity of the pull nose assembly.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If a movable plate mechanism is used to open the pull nose, then the pull tab can be replaced, but the assembling process becomes difficult and time-consuming

Engineering Contradiction:

Improvepull tab replaceabilityVSAvoidassembling ease

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The limiting block is designed to be dynamically movable through rotation rather than requiring pressing or manual manipulation of small components. The torsion spring provides automatic movement, transforming the static assembly process into a dynamic one that is easier to operate.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The torsion spring automatically resets the limiting block to its initial position after the pull tab is inserted, eliminating the need for manual pressing or complex assembly operations. The mechanism serves itself by using spring energy to complete the assembly action.

Inventive Principle:

Principle #25Self-service

3Adaptability or versatility

If manual pressing of the movable plate is required, then the pull tab can be assembled, but the assembling speed decreases

Engineering Contradiction:

Improvepull tab replaceabilityVSAvoidassembling speed

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The torsion spring is pre-loaded with elastic energy that is automatically released during the assembly process. This preliminary storage of energy performs the assembly action without requiring real-time manual effort, significantly increasing assembling speed.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The manual pressing mechanism is replaced with a spring-driven rotational mechanism. The torsion spring converts elastic potential energy into mechanical work, substituting the need for manual pressing with an automated spring-based system that operates faster and with less effort.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

The design significantly increases the speed and ease of pull tab assembly by using a torsional spring shaft to reset and lock the limiting block, facilitating the insertion of a new pull tab without the need for elaborate pressing mechanisms.

Implementation Method 1

the limiting block is provided with a torsional spring shaft; and the limiting block is movably connected to the pull nose through the torsional spring shaft

Methodology Applied

Scientific EffectTorsional spring: Torsion Spring

Implementation Method 2

The hinged limiting block is then reset under the action of the torsional spring shaft

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS12102194B2Zipper pull capable of being quickly assembled with pull tab

Publication Date: 2024.10.01 DONGGUAN LEXIANG HARDWARE & ZIPPER PROD CO LTD

AI summary

The present disclosure discloses a zipper pull capable of being quickly assembled with a pull tab, including an upper wing plate and a lower wing plate; the lower wing plate is fixedly arranged at a bottom of the upper wing plate; the upper wing plate is fixedly provided with a pull nose; a limiting block is arranged at a tail end of the pull nose; the limiting block is provided with a torsional spring shaft; and the limiting block is movably connected to the pull nose through the torsional spring shaft. One end of the pull nose of the zipper pull is fixedly connected to the upper wing plate, and the other end of the pull nose is movably provided with hinged limiting block.