Reversing Gear Adjustment Access for Venetian Blinds
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing reversing gears for external venetian blinds are difficult to adjust for different slat widths and angles of rotation, especially when installed, as the position adjustment device is often inaccessible from the installation position, leading to incomplete closure and reduced privacy, particularly above ground floor levels.
Innovation Solution
The design includes an adjustment access opening on the housing base allowing external access to the position adjustment device, enabling easy adjustment of the rotation angle range without disassembling the reversing gear, with features like a U-shaped header for better encapsulation and a locking mechanism for secure adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the position adjustment device is integrated inside the housing without external access, then the housing structure is compact and simple, but the device becomes difficult to adjust on-site after installation
Solution Approach 1:
The housing is segmented into a main housing body and a separate adjustable cover section. The cover can be removed or opened to provide access to the position adjustment device, while the main housing remains compact. This allows the adjustment mechanism to be accessible without permanently exposing it, resolving the contradiction between compact structure and adjustability.
Solution Approach 2:
An intermediary access mechanism (such as a removable cover or sliding panel) is introduced between the housing exterior and the position adjustment device. This intermediary element provides controlled access for adjustment while maintaining the overall compact and protective housing structure when closed.
2Adaptability or versatility
If the reversing gear is designed for fixed rotation angle, then the manufacturing and assembly are simpler, but the device cannot adapt to different slat widths and privacy requirements
Solution Approach 1:
The reversing gear is designed with dynamic adjustability, allowing the rotation angle range to be modified after manufacturing. The position adjustment device enables the cord holder to be repositioned along the winding shaft to change the rotation angle, making the device adaptable to different slat widths and privacy requirements without requiring multiple fixed-angle models.
Solution Approach 2:
The key parameter (rotation angle range) is made changeable through a simple adjustment mechanism. By allowing the cord holder position to be varied along the winding shaft, the system can adapt to different operational requirements while maintaining a standardized manufacturing process for the base reversing gear assembly.
3Productivity
If the stop arrangement is fixed during assembly, then the assembly process is faster, but the rotation angle range cannot be optimized for specific installations
Solution Approach 1:
The stop arrangement is pre-assembled in a default position during manufacturing to enable quick initial assembly. However, the design incorporates an adjustment mechanism that allows the stops to be repositioned later if precise rotation angle optimization is needed for specific installation conditions, balancing assembly speed with installation precision.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The reverse gear has a winder (3) that is incorporated around a rotary axis co-rotating around a winding shaft, where a winding section is provided for rolling and unrolling a lift tape (2). A rotating rod holder is incorporated axially next to the winding section co-rotatable on the winder. A position adjusting device is actuated from outside of a housing (1), where one of stoppers of a stopper assembly is arranged on an adjusting element. The adjusting element is placed on a housing wall section. An independent claim is included for a building opening shading device, particularly a venetian blind.