Tilt-and-Turn Door/Window Accessory with Reversible Sequence Selector

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Solution Overview

Problem

Existing tilt and turn door/window systems require multiple components and complex assembly processes to accommodate different opening sequences, leading to increased production and warehousing costs and potential malfunction due to threaded connections.

Innovation Solution

A single accessory with a reversible insert body for the selector members allows conversion between 'standard' and 'logic' opening sequences without modifying the catch position, using a simple and stable connection method.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple selector members with different positions are used to accommodate different opening sequences, then adaptability is improved, but device complexity increases

Engineering Contradiction:

Improveopening sequence configurationVSAvoidnumber of selector members

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The insert body is made movable relative to the base body, allowing it to be repositioned between different locations. This dynamic configuration enables a single accessory to accommodate different opening sequences (standard and logic) by simply moving the insert body, rather than requiring multiple fixed selector members.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

A single accessory design serves multiple functions by incorporating a movable insert body that can be positioned at different locations. This universal design allows the same accessory to support both standard and logic opening sequences, eliminating the need for multiple specialized components.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If threaded connections are used to fix the insert body, then adjustability is improved, but reliability deteriorates due to potential loosening

Engineering Contradiction:

Improveinsert body positioningVSAvoidconnection stability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The threaded connection element is removed from the design. Instead of using threads to attach the insert body to the base body, a different connection method is employed that eliminates the risk of threaded connections loosening over time while maintaining the ability to position and adjust the insert body.

Inventive Principle:

Principle #2Taking out (Extraction)

3Adaptability or versatility

If multiple components are used to achieve different opening sequences, then adaptability is improved, but manufacturing cost increases

Engineering Contradiction:

Improveopening sequence configurationVSAvoidproduction cost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

Multiple functional elements are merged into a single integrated accessory. The base body, insert body, and connection elements are combined into one unified component structure, reducing the total number of parts that need to be manufactured, stored, and assembled, thereby lowering production costs while maintaining adaptability.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

Inventive Principle:

Principle #6Universality (Multi-functionality)

4Adaptability or versatility

If multiple accessories are produced for different opening sequences, then adaptability is improved, but warehousing cost increases

Engineering Contradiction:

Improveopening sequence configurationVSAvoidnumber of accessories to store

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

Inventive Principle:

Principle #15Dynamics

Data Source

PatentEP4644649A1Accessory for tilt and turn doors or windows

Publication Date: 2025.11.05 MASTER LAB SRL

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Figure 2A

AI summary

Accessory (10) for tilt and turn doors or windows (100), comprising: a guide body (11) fixable to a side of a sash (100); a slide (13) slidable with respect to the guide body (11) and provided with connecting members (14) with a manoeuvring device (103) operable by a control element (104); a connecting arm (15) connecting the guide body (11) to a joint hinge (102) of the sash (100) to the fixed frame and having a first end (15a) jointed to the guide body (11) with a roto-translation motion, and a second end (15b) connectable to a movable component of a joint hinge (102); at least one catch (19) coupled to the connecting arm (15); selector elements (24) coupled to the slide (13) and configured to engage and disengage the catch (19) following the sliding of the slide (13) according to a predefinable sequence of engaging and disengaging positions corresponding to closing, tilt and turn positions, wherein the selector members (24) comprise at least one base body (25) coupled to the slide (13) and having at a first end at least one first engaging seat (27) for the catch (19), and at least one insert body (26) coupled to the base body (25) and having, arranged adjacent to each other, at least one second engaging seat (28) for the catch (19) and a recess (29) defining a free disengaging zone from the catch (19), and wherein the insert body (26) is reversibly connected to the base body (25) between a first position, in which the recess (29) is adjacent to the first engaging seat (27), and a second position, in which the second engaging seat (28) is adjacent to the first engaging seat (27).