Reinforcing Member Attachment for Electric Tool Battery Mounts

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Solution Overview

Problem

Existing electric tools with rechargeable batteries face challenges in securely attaching reinforcing members to guide groove structures due to the structures' molded design, leading to wear and potential detachment issues.

Innovation Solution

The electric tool incorporates a detachable reinforcing member with an engaging structure that connects to the guide groove structure before the molded members are joined, providing secure attachment without welding and allowing for easy assembly and replacement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If the guide groove structure is formed by two separate molded portions joined together, then the manufacturing flexibility and assembly are improved, but the reinforcing member cannot be securely attached by welding or heat crimping

Engineering Contradiction:

Improvemanufacturing flexibilityVSAvoidattachment security

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The guide groove structure is divided into two separate molded portions that are joined together, allowing independent manufacturing of each portion while maintaining the overall functional integrity of the guide groove

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The reinforcing member is attached to one of the molded portions before the two portions are joined together, ensuring secure attachment through welding or heat crimping while preserving the segmentation benefits

Inventive Principle:

Principle #10Preliminary action

2Strength

If the contact surface of the guide groove structure is reinforced by welding or heat crimping, then the wear resistance is improved, but the attachment becomes difficult due to the molded portion structure

Engineering Contradiction:

Improvewear resistanceVSAvoidattachment difficulty

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

The reinforcing member is attached to the molded portion before the final assembly of the two molded portions, allowing welding or heat crimping to be performed on a single piece rather than attempting to attach to the joined structure

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The guide groove structure is segmented into two molded portions, enabling the reinforcing member to be attached to one portion independently before assembly

Inventive Principle:

Principle #1Segmentation

3Reliability

If the reinforcing member is attached to the guide groove structure, then the wear of the contact surface is prevented, but the structure becomes more complex

Engineering Contradiction:

Improvewear preventionVSAvoidstructural complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The reinforcing member is integrated with one of the molded portions through welding or heat crimping, creating a unified component that simplifies the overall structure while providing wear protection

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS10076833B2Electric tools

Publication Date: 2018.09.18 MAKITA CORP

AI summary

An electric tool may include a battery mount portion having a guide groove structure that can be slidably fitted with a guide projection structure of a rechargeable battery. A reinforcing member may be attached to the guide groove structure of the battery mount portion and may include a connecting structure for detachably connecting the reinforcing member to the guide groove structure.