Roller Blind Mounting Assembly Notch Locking Mechanism
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Solution Overview
Problem
Existing roller shutter mounting assemblies face challenges in maintaining a rigid connection between the tubular shaft and the axis, particularly in preventing relative slippage and ensuring effective locking in translation, especially when subjected to strong accelerations or excessive speeds, which can lead to component breakage.
Innovation Solution
A roller shutter mounting assembly with a stirrup having spaced walls and a bridge, where the shaft passes through windows with notches, and a pressure screw is used to clamp the shaft, allowing for adjustable locking in translation and preventing slippage by engaging with the notches for a positive stop.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a square section shaft is used to support resistive torque, then the connection rigidity is improved, but the ability to adjust the position of the end piece along the axis is limited
Solution Approach 1:
The shaft is segmented with notches distributed along its length, allowing the stirrup to engage at different positions while maintaining the square cross-section for torque transmission. This segmentation enables both rigid connection and adjustable positioning.
Solution Approach 2:
The stirrup acts as an intermediary element between the shaft and the end piece, providing both the locking function (through engagement with notches) and the adjustment capability (by moving to different notch positions) while the square shaft maintains torque transmission.
2Reliability
If a locking device is added to prevent slippage between the end piece and the axis, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The stirrup is designed as a movable element that can be positioned at different locations along the shaft by adjusting the compression screw, allowing dynamic adaptation to different installation conditions while maintaining a simple overall structure.
Solution Approach 2:
The position of the stirrup along the shaft is adjusted by changing the compression parameter (screw tightening), which modifies the engagement position with the notches to achieve the desired locking effect without adding complex mechanisms.
3Adaptability or versatility
If the end piece position is made adjustable along the axis, then the adaptability to different installation conditions is improved, but the locking effectiveness may be compromised
Solution Approach 1:
The notches are pre-positioned at specific intervals along the shaft, and the stirrup is designed to engage with these pre-defined positions, ensuring that adjustment is possible only at predetermined locations where effective locking can be achieved.
Solution Approach 2:
The stirrup provides dynamic adjustability by allowing the end piece to be positioned at different notch locations along the shaft, while the engagement mechanism with the notches ensures reliable locking at each position.
Data Source
Figure 1~3
Figure 4~6
AI summary
The invention relates to a roller blind mounting assembly, including a tubular shaft used to roll and unroll the blind and a tip (6) for insertion into the shaft, and through which a rod (7) passes, one end of which is provided with a core (8) for the rotatable linking with the shaft, the other end (7a) of the rod being received in a recess forming a rotatable bearing, the relative position of the tip (6) along the length of the rod (7) being variable, said assembly comprising a device for translatably locking the tip (6) onto the rod (7), including a yoke (16) having two walls (16a, 16b) which are spaced apart and connected by a bridge (16c), each wall comprising a window (17a, 17b) through which the rod (7) passes, the bridge (16c) having a pressure means (M) for tightly clamping the rod on an edge (19a, 19b) of the windows, the rod (7) comprising notches (20) that are distributed over the length thereof, with which the edge (19a, 19b) of at least one window (17a, 17b) of the yoke (16) are engageable so as to firmly stop the yoke on the rod and lock the tip (6) against the yoke (16).