Power Tool Guiding Device Automatic Switch Actuator Reset

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Solution Overview

Problem

Existing hand-held power tool guiding devices are inefficient for drilling overhead ceilings due to heavy equipment and require manual effort to position the switch actuator, especially for power tools with restart interlocks, which complicates remote control operations.

Innovation Solution

The switch actuator is designed to automatically adjust into an operational ready position during power tool insertion, featuring rotational and translational movement, integrated with a reset device using a compression leg spring for efficient operation and reduced component count.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the switch actuator is manually adjusted into position, then the power tool can be operated with remote control, but additional manual work steps are required and operation becomes more complex

Engineering Contradiction:
Improveease of operationVSAvoiddevice complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The switch actuator is pre-positioned to automatically move into the correct operational position when the power tool is inserted into the receptacle element. This preliminary positioning action eliminates the need for manual adjustment by the operator, directly resolving the contradiction by improving ease of operation while maintaining device complexity at an acceptable level.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The switch actuator performs self-positioning through the insertion motion itself, without requiring external manual intervention. The actuator automatically transitions to the correct position as a direct result of the power tool being inserted, making the system self-servicing and eliminating additional manual work steps.

Inventive Principle:
Principle #25Self-service

2Ease of operation

If the switch actuator is mounted on the receptacle element, then the actuator is always correctly positioned, but the device requires additional mounting components

Engineering Contradiction:
Improveease of operationVSAvoiddevice complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The switch actuator is integrated directly into the receptacle element structure, combining two previously separate components (actuator and receptacle) into a unified assembly. This merging ensures the actuator is always correctly positioned while minimizing additional components by making the actuator an integral part of the receptacle rather than a separate mounted component.

Inventive Principle:
Principle #5Merging (Combining)

3Extent of automation

If the compression leg spring is pre-tensioned, then the switch actuator automatically resets to standby position, but the spring exerts continuous force on the system

Engineering Contradiction:
Improveextent of automationVSAvoidforce
Core Design Contradiction:
Extent of automationVSForce

Solution Approach 1:

The compression leg spring is pre-tensioned during assembly to store potential energy, creating a preliminary force condition that automatically drives the switch actuator back to the standby position after operation. This pre-loaded spring provides automated resetting without requiring additional active control mechanisms.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The compression leg spring provides periodic resetting action - the spring force is continuously stored but only actively exerts force when the switch actuator moves from the standby position, automatically returning it to the initial state after each use cycle.

Inventive Principle:
Principle #19Periodic action

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This solution simplifies the operation of hand-held power tools by eliminating the need for additional manual adjustments, ensuring the switch actuator is always in the correct position and automatically resets, enhancing user convenience and safety.

Implementation Method 1

a reset device (42) for resetting the switch actuator (30), wherein the reset device (42) is configured as a compression leg spring

Methodology Applied
Scientific EffectElastic potential energy storage and release: Spring

Data Source

PatentUS8905687B2Hand-held power tool guiding device and method
Publication Date: 2014.12.09 HILTI AG
  • US8905687B2 patent drawing
  • US8905687B2 patent drawing
  • US8905687B2 patent drawing

AI summary

A hand-held power tool guiding device and method is disclosed. The device includes a receptacle element for receiving the power tool, a remote control device for operating the power tool, and a transmission device for transmitting the movement of the remote control device to the power tool. The transmission device has a switch actuator and a connecting element, where the switch actuator is adjustable into a standby position during insertion of the power tool into the receptacle element.