Portable Battery Charger Cover and Locking Bays for Jobsite Security

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Solution Overview

Problem

Existing battery chargers for power tools are often bulky, heavy, and lack adequate environmental protection and security features, making them unsuitable for harsh work environments and prone to theft.

Innovation Solution

A portable battery charger with a compact, lightweight design featuring multiple charging bays, a pivotable cover for environmental protection, and a lock assembly with a staple, slot, and tether system to secure the charger and battery packs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If increased security features (lock assembly, tether) and environmental protection (cover) are added to the charger, then security and environmental resilience are improved, but weight and size increase

Engineering Contradiction:
ImprovesecurityVSAvoidweight
Core Design Contradiction:
ReliabilityVSWeight of moving object

Solution Approach 1:

The charger is divided into modular components: a housing with charging bays, a separate pivotable cover for environmental protection, and a lock assembly with staple and tether for security. This segmentation allows each component to be optimized independently and facilitates portability by enabling selective attachment and removal of security and protection elements.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The cover is designed as a thin, pivotable shell that provides environmental protection when closed without significantly increasing the charger's overall size or weight. The tether is a flexible cable that can be wrapped around objects for security without adding substantial weight.

Inventive Principle:
Principle #30Flexible shells and thin films

2Reliability

If a lock assembly with staple, slot, and tether is added to secure the charger and battery packs, then security is improved, but device complexity increases

Engineering Contradiction:
ImprovesecurityVSAvoidcomplexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The lock assembly combines multiple security functions into a single integrated system: the staple provides a mounting point, the slot guides the tether, and the tether itself serves as both a securing mechanism and a portable handle. This merging reduces the number of separate components and simplifies the overall structure.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The tether serves multiple functions: it secures the charger to fixed objects, secures battery packs within the charger, and can be used as a portable handle for carrying the charger. The staple similarly serves both as a structural element and a mounting point for the tether.

Inventive Principle:
Principle #6Universality (Multi-functionality)

3Weight of moving object

If the charger is designed to be compact and lightweight for portability, then ease of transport is improved, but environmental protection and security features are reduced

Engineering Contradiction:
ImproveweightVSAvoidenvironmental protection
Core Design Contradiction:
Weight of moving objectVSObject-affected harmful factors

Solution Approach 1:

The cover is designed to pivot between open and closed positions, allowing the user to access charging bays easily while providing environmental protection when closed. This dynamic design provides protection without requiring a bulky enclosed structure.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The pivotable cover provides preliminary protection against environmental factors (rain, dust, debris) by creating a barrier that can be closed before exposure to harsh conditions. The lock assembly provides preliminary security by allowing the charger to be secured to fixed objects or have battery packs locked in place before theft or loss can occur.

Inventive Principle:
Principle #9Preliminary anti-action

Data Source

PatentUS20250038553A1Work area charger
Publication Date: 2025.01.30 MILWAUKEE ELECTRIC TOOL CORP
  • US20250038553A1 patent drawing
  • US20250038553A1 patent drawing
  • US20250038553A1 patent drawing

AI summary

A charging box has a housing with first and second ends, charging bays, a cover, and a lock assembly. The charging bays are between the first end and the second end. Each of the charging bays removably receives a battery pack in an insertion direction. The cover pivots on the housing nearer to the second end than to the first end. The cover moves between an open position and a closed position. The lock assembly includes a staple, a slot in the cover, a protrusion coupled to the housing adjacent the staple, and a tether coupled to the housing. The staple is nearer to the first end than to the second end. The staple receives a padlock. The slot receives the staple therethrough. The tether has a distal end with a loop. The loop is receivable about the protrusion.