Synchronized Pinion Roller Blind Handlebar Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fabric roller blinds suffer from non-alignment of handle bar terminals during movement, leading to uneven fabric stretching, potential breakage, and increased maintenance costs due to complex and costly alignment mechanisms that require custom design and installation.
Innovation Solution
A fabric roller blind design featuring a handle bar with synchronized lower and upper pinions engaged with racks, connected by a rotary shaft, allowing for aligned movement regardless of grip position, and allowing for easy adaptation during installation by cutting components to size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the handle bar is gripped at a non-centered position during movement, then the user can operate the blind from any position, but the handle bar terminals become misaligned causing uneven fabric stretching and potential breakage
Solution Approach 1:
A guide chain is introduced as an intermediary element between the handle bar and the guides. The guide chain includes a first portion connected to the first handle bar terminal and a second portion connected to the second handle bar terminal, with a connection element joining the two portions. This intermediary mechanism ensures that both terminals move synchronously along the guides regardless of where the user grips the handle bar, preventing misalignment and fabric damage while maintaining operational flexibility
2Reliability
If complex alignment mechanisms are added to maintain terminal alignment, then the handle bar terminals remain aligned during movement, but the device complexity and manufacturing costs increase
Solution Approach 1:
The guide chain is constructed as a flexible linkage system that can bend and adapt to the movement requirements. The chain comprises flexible portions connected by joints, allowing it to accommodate the handle bar's movement while maintaining terminal alignment. This flexible approach achieves reliable alignment without requiring complex rigid mechanical structures
Solution Approach 2:
The guide chain's configuration parameters (linkage lengths, joint positions) are designed to change dynamically during operation. As the handle bar moves, the guide chain automatically adjusts its geometry to maintain proper terminal alignment, providing adaptability without complex control mechanisms
3Reliability
If custom-designed alignment mechanisms are implemented, then terminal alignment is achieved, but the production and installation costs increase
Solution Approach 1:
The guide chain is divided into modular segments (first portion, second portion, and connection element) that can be manufactured separately and assembled. This segmentation allows for standardized production of individual components using conventional manufacturing processes, reducing overall production costs compared to custom-designed integrated mechanisms
Solution Approach 2:
The guide chain design serves multiple functions: it maintains terminal alignment, guides the handle bar movement, and accommodates various grip positions. This multi-functionality eliminates the need for separate alignment mechanisms, reducing both production and installation costs
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
Ensures reliable, long-term alignment of handle bar ends, reduces maintenance, and allows for standardized production and easy installation, making the blind more affordable and aesthetically pleasing.
Implementation Method 1
a lower pinion (11) mechanically supported by the handle bar (6), placed at the lower termination (7) of the handle bar (6) and engaged in a shape relationship with a lower rack (15) which is intended to be associated with the lower wall delimiting the opening (A) and an upper pinion (12) mechanically supported by the handle bar (6) at the upper termination (8) and engaged in a shape relationship with an upper rack (16) intended to be fixed to the upper wall delimiting the opening (A)
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
Fabric roller blind, which comprises a support frame (2) intended to be fixed to a load-bearing structure in which an opening (A) is obtained, a take-up roller (4) having a substantially vertical rotation axis (X) rotatably constrained to the lateral upright (21), a fabric (5) fixed to the take-up roller (4), a handle bar (6), to which the fabric (5) is fixed, the handle bar (6) extended along an extension axis (Z) substantially parallel to the rotation axis (X) of the take-up roller (4) and movable between an open position and a closed position, a lower pinion (11) rotatably connected to the handle bar (6) at the lower termination (7) and engaged in a shape relationship with a lower rack (15) fixed to the lower wall defining the opening (A), an upper pinion (12) rotatably connected to the handle bar (6) at the upper termination (8) and engaged in a shape relationship with an upper rack (16) fixed to the upper wall defining the opening (A), synchronization means (9) housed within the handle bar (6) to mechanically connect between the lower pinion (11) and the upper pinion (12) in order to synchronize their movement during the open position and the closed position of the handle bar (6).