Handheld Power Tool Charger Mounting System

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Solution Overview

Problem

Existing charger mounting systems for battery packs of handheld power tools are difficult to assemble and disassemble, often result in tilting or damage to the wall surface, and lack clear guidance for screw placement, leading to insecure attachment and potential falls.

Innovation Solution

A holding system with a detachable charger and holder that includes adjustable feet and latching mechanisms, allowing for easy assembly and disassembly, and featuring a defined angle to prevent battery packs from falling, along with a radio module for wireless communication and data transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the charger is mounted using recesses and fastening elements (screws, hooks, rails), then the charger can be attached to the wall, but the assembly process becomes difficult and time-consuming, and the fasteners are not visible during attachment causing the charger to tilt and/or damage the wall surface

Engineering Contradiction:
Improveattachment securityVSAvoidmounting ease
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The mounting system uses self-aligning features where the charger housing itself guides the fastening elements into position through visible alignment marks and guide structures, eliminating the need for precise pre-drilling and allowing users to easily see and follow the mounting process without special tools or complex procedures

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The mounting system separates the fastening function from the mounting bracket, using individual visible fastening elements that can be independently positioned and secured, allowing for easy adjustment and visible alignment during the mounting process

Inventive Principle:
Principle #1Segmentation

2Reliability

If screws are used to attach the charger, then the charger can be securely fastened, but it is not clearly defined how far the screws must protrude, leading to installation difficulties and potential falls

Engineering Contradiction:
Improvemounting securityVSAvoidinstallation clarity
Core Design Contradiction:
ReliabilityVSEase of manufacture

Solution Approach 1:

The mounting system incorporates visually distinct colored components and alignment marks that clearly indicate the correct screw protrusion depth and positioning, making the installation process intuitive and eliminating guesswork about fastener depth

Inventive Principle:
Principle #32Color changes

Solution Approach 2:

The system includes pre-marked mounting positions and pre-configured fastening element lengths that are optimized for the specific charger weight and dimensions, eliminating the need for users to determine correct screw depths during installation

Inventive Principle:
Principle #10Preliminary action

3Adaptability or versatility

If the charger is detachably mounted to allow frequent assembly and disassembly, then mobility and flexibility are improved, but the mounting security and reliability may be compromised

Engineering Contradiction:
Improvemounting flexibilityVSAvoidattachment security
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

The mounting system employs a dynamic fastening mechanism that transitions between locked and unlocked states through a simple user action, providing secure attachment during use while enabling quick detachment when needed, with the security level adapting to the operational state

Inventive Principle:
Principle #15Dynamics

Data Source

PatentEP3229337B1Charger
Publication Date: 2023.01.11 ROBERT BOSCH GMBH
  • EP3229337B1 patent drawingFigure 1
  • EP3229337B1 patent drawingFigure 2
  • EP3229337B1 patent drawingFigure 3

AI summary

A charger for electrically charging at least one battery pack of a hand-held power tool is described, comprising at least one interface for electrical and/or mechanical coupling of the charger to a corresponding interface of the battery pack, and a holder, wherein the charger can be detachably attached to the holder via a fastening device; wherein the holder can be attached to a surface and wherein the fastening device has at least one locking means for detachably locking the charger to the holder.