Ski Boot Joint Locking Mechanism With Guided Carriage

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Solution Overview

Problem

Existing locking devices for ski boots are complex to manufacture, unreliable, heavy, bulky, difficult to handle, and do not allow sufficient movement for comfortable walking, often leading to improper use during alpine skiing.

Innovation Solution

A locking device with a blocking element and mating element that moves between positions, guided by a shaft and carriage system, allowing easy transition between locked and unlocked configurations, using a cable for operation and incorporating a sliding member for smooth movement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional locking devices are used, then the articulation can be locked and released, but the device becomes complex to manufacture, heavy, and bulky

Engineering Contradiction:
Improvelocking reliabilityVSAvoiddevice complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The locking device is divided into separate functional components: a blocking element with blocking protrusions for locking, and a corresponding mating element with recesses. This segmentation allows each component to be simple and easy to manufacture while collectively providing reliable locking functionality.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The invention extracts the essential locking function from complex traditional mechanisms, using only minimal elements (blocking protrusions and recesses) to achieve reliable locking without unnecessary complexity, weight, or bulk.

Inventive Principle:
Principle #2Taking out (Extraction)

2Reliability

If traditional locking devices are used, then the articulation can be blocked, but the device becomes heavy and bulky

Engineering Contradiction:
Improvelocking reliabilityVSAvoiddevice weight
Core Design Contradiction:
ReliabilityVSWeight of moving object

Solution Approach 1:

The invention removes excess weight by using only the minimal necessary elements for locking (blocking protrusions and recesses) rather than heavy traditional mechanisms, while maintaining reliable locking functionality.

Inventive Principle:
Principle #2Taking out (Extraction)

3Reliability

If traditional locking devices are used, then the articulation can be locked, but the device becomes difficult to handle

Engineering Contradiction:
Improvelocking reliabilityVSAvoidease of operation
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The locking mechanism is segmented into simple, discrete blocking elements that can be easily actuated individually, making the overall device simple to operate while maintaining reliable locking through the coordinated action of these simple elements.

Inventive Principle:
Principle #1Segmentation

4Reliability

If traditional locking devices are used, then the articulation can be blocked, but sufficient range of movement is not achieved for comfortable walking

Engineering Contradiction:
Improvelocking reliabilityVSAvoidrange of movement
Core Design Contradiction:
ReliabilityVSAdaptability or versatility

Solution Approach 1:

The locking device is designed to be dynamically controllable, allowing the blocking element to move between engaged and disengaged positions, enabling the articulation to transition smoothly between locked and free states, thus achieving comfortable walking range of movement while maintaining reliable locking when needed.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentEP4397203B1Locking device for a sports shoe
Publication Date: 2025.07.30 ROSSIGNOL LANGE SRL
  • EP4397203B1 patent drawingFigure 1
  • EP4397203B1 patent drawingFigure 2
  • EP4397203B1 patent drawingFigure 3

AI summary

Locking device (10) for locking a rotational joint between a lower shell (2) and a collar (3) of a sports shoe (1), comprising a locking element (22) movable between a locking position and an unlocking position, and a conjugate element (12) adapted to cooperate with the locking element, the locking device comprising a shaft (33) integral with the locking element, a housing (21) comprising a first guide light (31), a carriage (26) movable relative to the housing, the carriage comprising a second guide light (32), the shaft cooperating with the first guide light and with the second guide light so that a displacement of the carriage relative to the housing causes a displacement of the locking element.