Magnetic Fastener Insert Tool for Simultaneous Multi-Fastener Placement

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Solution Overview

Problem

Existing fastener insertion tools can only place fasteners one at a time, which is inefficient for assembling parts with multiple fastener openings.

Innovation Solution

A fastener insert tool with an inner trigger part and an outside case part, featuring inner and outer legs with magnets, allows for simultaneous placement of multiple fasteners using sliding mechanisms and magnets for retention.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If traditional drivers and sockets are used to place fasteners one at a time, then the tool structure is simple, but the assembly time increases significantly

Engineering Contradiction:

Improveassembly speedVSAvoidtool structure

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The tool divides the fastener holding function into multiple independent magnetic segments (legs), each capable of holding and positioning individual fasteners. This segmentation allows multiple fasteners to be held and placed simultaneously, increasing assembly speed while maintaining manageable structural complexity through modular design

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent combines multiple fastener placement operations into a single tool by integrating multiple magnetic legs and positioning mechanisms into one unified device. This merging allows the tool to handle multiple fasteners simultaneously, reducing the number of separate operations needed and thereby increasing productivity

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If magnets are used to hold fasteners on the inner legs, then fastener retention is improved, but the risk of inadvertent dropping increases

Engineering Contradiction:

Improvefastener retentionVSAvoidinadvertent dropping

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The tool employs dynamic control of magnetism through the sliding mechanism. When the inner legs slide within the outer legs, the magnetic field is activated to hold fasteners securely. When release is needed, the sliding action deactivates or reverses the magnetic field, allowing controlled release. This dynamic control ensures reliable retention during positioning while preventing inadvertent dropping through intentional activation

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The sliding mechanism provides tactile and visual feedback to the user about the magnetic engagement state. The position of inner legs relative to outer legs indicates whether fasteners are securely held or ready for release, allowing the user to control the magnetic field activation and deactivation intentionally, thereby preventing inadvertent dropping

Inventive Principle:

Principle #23Feedback

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

Facilitates the simultaneous placement of multiple fasteners into hard-to-reach locations, reducing assembly cycle time and preventing inadvertent dropping, thus enhancing efficiency in assembly processes.

Implementation Method 1

engaging fasteners using magnets of a fastener insert tool

Methodology Applied

Scientific EffectMagnetic attraction: Magnetism

Data Source

PatentUS12558761B2Fastener insert tools and methods of inserting fasteners using fastener insert tools

Publication Date: 2026.02.24 TOYOTA MOTOR ENG & MFG NORTH AMERICA INC

AI summary

A fastener insert tool includes an inner trigger part that includes inner legs and an outside case part that includes outer legs that are configured to slidably receive the inner legs of the inner trigger part. The inner legs of the inner trigger part are configured to slide relative to the outer legs of the outside case part to release fasteners from magnets carried by the inner legs of the trigger part.