Explosive Discharge Tool Cartridge Advancing Lever Guideway

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Solution Overview

Problem

Conventional explosive discharge actuated tools face difficulties in maintaining stable and correct load advancing due to deviations in the inner tube relative to the external sleeve, leading to enlarged deviations in the load advancer position and instability in cartridge loading.

Innovation Solution

The tool incorporates a multi-cartridge strip with side notches and a trigger and cartridge advancing module, including a mounting frame, pivotable levers, a link bar, and a biasing returning member, which stabilizes the movement of the cartridge advancing lever through a guideway, ensuring precise engagement and advancement of cartridges to the firing position.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a long pushing rod is used to advance cartridges, then the load-feeding mechanism can be operated manually, but the deviation of the load advancer position is enlarged due to clearance between the inner tube and external sleeve

Engineering Contradiction:

Improvemanual operation of load-feeding mechanismVSAvoidposition accuracy of load advancer

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

The patent divides the cartridge advancement function into two separate levers: the trigger lever for firing and the cartridge advancing lever for loading. This segmentation eliminates the need for a long pushing rod, as each lever performs its specific function independently with short movement paths, thereby preventing deviation amplification while maintaining manual operability.

Inventive Principle:

Principle #1Segmentation

2Productivity

If the inner tube moves forward and rearward relative to the external sleeve, then cartridge feeding is achieved, but the inner tube is liable to be deviated due to clearance between the components

Engineering Contradiction:

Improvecartridge feeding functionVSAvoidstability of load advancing function

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent introduces a guideway as an intermediary component that guides the movement of the cartridge advancing lever. This guideway ensures that the lever moves along a precise path without deviation, thereby achieving reliable cartridge feeding while eliminating the clearance-induced instability problem of the inner tube-sleeve interface.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Device complexity

If the deviation of the inner tube is proportionally enlarged at the end of the long pushing rod, then the mechanical structure can be simple, but the load advancer position accuracy deteriorates

Engineering Contradiction:

Improvesimplicity of mechanical structureVSAvoidposition accuracy of cartridge loading

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The patent segments the firing and loading functions into separate levers, eliminating the long pushing rod that amplifies deviation. The cartridge advancing lever is pivotally attached to the mounting frame with a short movement path, achieving high position accuracy without complex compensation mechanisms, thus maintaining structural simplicity while improving precision.

Inventive Principle:

Principle #1Segmentation

4Extent of automation

If the trigger lever is pivotably attached to advance cartridges, then the firing and loading functions can be integrated, but the turning stability of the trigger lever may be compromised

Engineering Contradiction:

Improveintegration of firing and loading functionsVSAvoidstability of trigger lever turning

Core Design Contradiction:

Extent of automationVSReliability

Solution Approach 1:

The guideway serves as an intermediary that constrains and guides the trigger lever's turning motion. By providing a defined path for the lever's movement, the guideway ensures stable and repeatable turning action, enabling reliable integration of firing and loading functions while maintaining precision and consistency.

Inventive Principle:

Principle #24Intermediary (Mediator)

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

This design enhances the stability and accuracy of cartridge loading, reducing deviations and ensuring proper advancement, thereby improving the reliability of the load advancing function compared to prior art.

Implementation Method 1

drives fasteners by detonating a cartridge loaded therein to release explosive gas pressure

Methodology Applied

Scientific EffectExplosion: Explosion

Implementation Method 2

The biasing returning member is disposed to bias the cartridge advancing lever, the link bar, the trigger lever and the trigger to return to their original positions

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS11198212B1Explosive discharge actuated tool for driving fasteners

Publication Date: 2021.12.14 LEE CHUNG YI

AI summary

An explosive discharge actuated tool is used with a multi-cartridge strip for driving fasteners, and includes a tool housing, a firing module disposed within the tool housing and rearwardly of a firing position, and a trigger and cartridge advancing module coupled with the firing module such that turning of a trigger lever causes turning of a cartridge advancing lever to move the strip so as to move a next cartridge to the firing position during the cartridge detonation in the firing position.