Striking Tool Attachment Member Rotation Mechanism

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Solution Overview

Problem

Existing striking tools face issues with attachment members coming off during operation, particularly during float-striking, due to the need for a large operation load for attachment and detachment, and the risk of the attachment member being hooked by the floated head of the fastener.

Innovation Solution

The striking tool features an attachment member that can be fixed and released from the nose part by a rotating operation in a direction different from the ejecting direction of the fastener, utilizing guide grooves and protrusions to securely attach and detach without requiring a large operation load, preventing the attachment member from coming off even when tilted.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the attachment member is press-fitted and attached in the ejecting direction of the fastener, then it is possible to attach and detach the attachment member, but the attachment member is likely to come off during the striking operation

Engineering Contradiction:

Improveattachment and detachment of attachment memberVSAvoidattachment member retention

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent inverts the conventional attachment direction by operating in a direction different from the fastener ejecting direction (e.g., perpendicular or angled direction). This inversion prevents the attachment member from being hooked by the floated head of the fastener, as the attachment operation vector no longer aligns with the potential detachment vector caused by fastener rebound.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent introduces asymmetric engagement features including guide grooves and protrusions that create a non-reversible attachment mechanism. The guide groove in the attachment member engages with a protrusion on the nose part in a specific direction, making attachment easy along the guide groove while preventing detachment unless a specific release operation is performed, thus creating asymmetric ease of attachment versus resistance to unintended detachment.

Inventive Principle:

Principle #4Asymmetry

2Reliability

If the attachment member is tightly fitted to prevent coming off, then reliability improves, but a large operation load is required when attaching and detaching the attachment member

Engineering Contradiction:

Improveattachment member retentionVSAvoidattachment and detachment of attachment member

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent segments the attachment mechanism into distinct functional elements: a guide groove for directional guidance, a protrusion for engagement, and a release operation mechanism. This segmentation allows the attachment process to be divided into easy guidance (along the groove) and controlled engagement (via the protrusion), reducing the overall operation load while maintaining secure attachment through the distributed engagement points.

Inventive Principle:

Principle #1Segmentation

3Productivity

If float-striking is performed with the attachment member largely protruding, then the nail can be easily pulled out when dismantling, but the attachment member may come off when the machine is tilted due to recoil

Engineering Contradiction:

Improveease of dismantlingVSAvoidattachment member retention during striking

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The guide groove and protrusion mechanism acts as an intermediary that mediates between the attachment member and the nose part, providing a controlled engagement that accommodates the protruding attachment member configuration needed for float-striking while preventing unintended detachment through the directional guidance and asymmetric engagement features.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS12172273B2Striking tool

Publication Date: 2024.12.24 MAX CO LTD

AI summary

A striking tool having an ejecting path of a fastener which is formed in a nose part, and configured to sequentially strike fasteners supplied to the nose part, includes an attachment member that can be attached to and detached from a tip end of the nose part. The attachment member can be fixed to and released from the nose part by an operation in a direction different from an ejecting direction of the fastener.