Toolless Side Handle for Power Tools with Rotation Locking

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Solution Overview

Problem

Existing side handles for power tools are less versatile as they require a dedicated mount and cannot be toollessly positioned on various power tool models.

Innovation Solution

A side handle design featuring a rotation locking member and an operable portion that allows toolless angle adjustment and attachment to multiple power tool models, utilizing connector bolts and operation knobs that restrict rotation to secure the side handle in place.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a side handle uses a dedicated mount for attachment, then the positioning and locking mechanism is simple, but the versatility across different power tool models is reduced

Engineering Contradiction:

ImproveversatilityVSAvoidattachment mechanism complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The side handle is designed with a universal attachment mechanism that can be mounted on different power tool models without requiring model-specific dedicated mounts. The handle incorporates a standardized mounting interface that adapts to various tool bodies, enabling one handle design to serve multiple tool types and models, thereby achieving versatility across different power tools.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Ease of operation

If a side handle requires a screwdriver or tool for positioning, then the locking is secure, but the ease of operation is reduced

Engineering Contradiction:

Improvetoolless positioningVSAvoidlocking security

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The side handle incorporates a self-servicing locking mechanism where the user can directly operate the handle to achieve both positioning and locking without requiring external tools like screwdrivers. The mechanism allows the user to manually adjust the handle angle and secure it in place through direct manipulation, enabling toolless installation and adjustment while maintaining reliable locking.

Inventive Principle:

Principle #25Self-service

3Ease of operation

If a side handle allows free rotation for positioning, then the ease of operation is improved, but the risk of accidental rotation increases

Engineering Contradiction:

Improveangle adjustmentVSAvoidaccidental rotation

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The side handle employs a dynamic locking mechanism that transitions between a locked state (preventing rotation) and an unlocked state (allowing free rotation for positioning). The mechanism includes a latch or clip that engages with a mounting surface to prevent accidental rotation during use, while also allowing the user to easily release and reposition the handle when needed. This dynamic design provides both ease of adjustment and protection against unintended movement.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS11938612B2Side handle for power tool and power tool

Publication Date: 2024.03.26 MAKITA CORP

AI summary

A side handle can be toollessly positioned on a tool body, and is attachable to power tools of multiple models and is highly versatile. A side handle is attachable to a side surface of a tool body included in a power tool. The side handle includes a rotation locking member attachable to the tool body in a manner of being restricted from rotating, and an operable portion operable to lock and unlock a position of the side handle relative to the rotation locking member.