Modular Tool Coupling With Quick-Release Locking Mechanism

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Solution Overview

Problem

Existing tool devices require a time-consuming process to detach modules from each other, as they rely on threaded connections that are cumbersome to unscrew.

Innovation Solution

A tool device design featuring a first module with a receptacle and a second module with an insertion part that can be rotated between locked and enabled positions, utilizing projections and ramps to facilitate quick detachment, along with a locking mechanism that allows or prevents detachment based on position.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If threaded connections are used to connect modules, then the connection is secure and reliable, but the detachment process becomes time-consuming and complex

Engineering Contradiction:
Improveconnection reliabilityVSAvoiddetachment time
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The connection mechanism is segmented into discrete engagement elements (protrusions on the insertion part matching recesses in the receptacle) that can be independently engaged and disengaged. This segmentation allows the connection to be established through simple linear insertion while enabling rapid detachment by releasing individual segments, resolving the contradiction between secure connection and quick release.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The connection system incorporates dynamic elements including spring-loaded locking mechanisms and movable engagement surfaces that automatically transition between locked and unlocked states. The spring elements provide automatic engagement force while allowing controlled disengagement, enabling the system to maintain reliable connection during operation while facilitating rapid detachment when needed.

Inventive Principle:
Principle #15Dynamics

2Reliability

If threaded connections are used to connect modules, then the connection is secure, but the operation becomes cumbersome and less efficient

Engineering Contradiction:
Improveconnection securityVSAvoidmodule attachment and detachment
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

Instead of requiring rotational unscrewing to detach modules, the invention inverts the detachment mechanism to use linear motion in the opposite direction of insertion. The release element simply needs to be pulled back along the insertion axis to disengage the protrusions from recesses, making the operation as simple as the attachment process and dramatically improving ease of operation while maintaining connection security.

Inventive Principle:
Principle #13The other way round (Inversion)

Solution Approach 2:

The complex threaded connection elements are extracted and replaced with simple geometric protrusions and recesses that engage through basic linear insertion. This extraction of complexity from the connection mechanism eliminates the need for rotational operations while maintaining secure engagement, significantly simplifying the user operation.

Inventive Principle:
Principle #2Taking out (Extraction)

3Stability of the object's composition

If a locking mechanism is added to prevent unintended detachment, then connection stability improves, but device complexity increases

Engineering Contradiction:
Improvemodule connection stabilityVSAvoidlocking mechanism complexity
Core Design Contradiction:
Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The locking function is merged with the existing engagement structure by incorporating spring elements and positioning surfaces into the basic protrusion-recess mechanism. The same components that provide connection also provide locking through elastic retention forces, eliminating the need for separate locking devices and maintaining structural simplicity while achieving stable connection.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The locking mechanism operates automatically through spring-loaded elements that self-engage when modules are inserted and self-lock without user intervention. The spring elements maintain constant engagement force and automatically prevent unintended detachment, providing stability while requiring no additional user action or complex control systems.

Inventive Principle:
Principle #25Self-service

Data Source

PatentUS11247322B2Tool device—with module attachments
Publication Date: 2022.02.15 HILTI AG
  • US11247322B2 patent drawing
  • US11247322B2 patent drawing
  • US11247322B2 patent drawing

AI summary

A tool device comprises a first module and a second module that can be detached from the first module, the first module having a receptacle and the second module having an insertion part that can be inserted in the receptacle along an insertion axis. The insertion part can be rotated in the receptacle about the insertion axis between a locked position and an enabled position, the receptacle having a first projection and the insertion part having a second projection. In the locked position, the second projection engages behind the first projection in the direction of the insertion axis, and in the enabled position, the first projection enables the second projection to pass in the direction of the insertion axis, the receptacle preventing an activation of the tool device in an initial position and allowing activation of the tool device in a pressed-on position.