Roller Blind Box Snap-In Mounting via Mushroom Locks

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Solution Overview

Problem

Existing roller shutter box designs face challenges with connecting the double head piece to the wall, often requiring screws or glue, which can damage the walls, are costly, and may not provide a secure or convenient connection, especially for long roller shutter boxes.

Innovation Solution

A mounting part with mushroom-head-like latching parts that engage through-openings in the walls, allowing for a firm, snap-in connection without additional tools, and can be produced via injection molding for a secure and cost-effective assembly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If screwing is used to fix the double head piece to the wall, then a secure connection is achieved, but the wall may be damaged and the cost increases

Engineering Contradiction:

Improveconnection securityVSAvoidwall damage

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the mechanical screw connection system with a snap-in connection system using elastic locking parts. The locking parts are formed as integral parts of the double head piece and engage with corresponding locking openings in the wall, eliminating the need for separate fasteners that could damage the wall.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The locking parts are designed to automatically engage with the locking openings through a snap-in mechanism. The elastic locking parts deform during insertion and automatically lock into place, providing self-aligning and self-securing connection without requiring additional tools or operations.

Inventive Principle:

Principle #25Self-service

2Reliability

If gluing is used to fix the double head piece to the wall, then a secure connection is achieved, but adhesive dripping occurs and the location cannot be conveniently specified

Engineering Contradiction:

Improveconnection securityVSAvoidapplication convenience

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent replaces the chemical adhesion system with a mechanical snap-in connection system. The elastic locking parts physically engage with the locking openings through deformation and elastic recovery, eliminating the need for adhesive application and curing processes.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

Inventive Principle:

Principle #25Self-service

3Ease of manufacture

If inserting projections into longitudinal grooves is used, then connection is achieved, but longitudinal displacement occurs and additional screwing/gluing is required

Engineering Contradiction:

Improveconnection simplicityVSAvoidposition stability

Core Design Contradiction:

Ease of manufactureVSStability of the object's composition

Solution Approach 1:

The patent replaces the simple insertion system with an elastic locking system. The locking parts are formed as integral parts of the double head piece and engage with corresponding locking openings in the wall, providing both ease of installation and position stability through elastic deformation and automatic locking.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentEP2735690B1Roller blind box

Publication Date: 2015.10.28 EXTE EXTRUDERTECHN

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AI summary

The box has a winding shaft (6) aligned transversely in a longitudinal extension (L). A support part (7) is connected with a front wall (5), a rear wall (2), a bottom (4) and/or a ceiling (3). The support part is formed with multiple mushroom-shaped locking elements (8) that are engaged to connect to through-holes, which are formed in the front wall, the rear wall, the bottom and/or the ceiling. The mushroom-shaped locking elements are formed integrally with the support part, where the support part is designed as a plastic injection-molded part.