Telescopic Winding Shaft Locking Mechanism
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Solution Overview
Problem
Existing building opening shading devices with telescopic winding shafts face challenges in securely fixing the winding shaft during assembly and preventing unwanted compression or telescoping during operation, especially in confined spaces, where existing solutions are difficult to install and cumbersome to use.
Innovation Solution
A safety device featuring an annular stop surface on the hollow shaft and a counter-stop pin on the side part, which can be easily adjusted and secured to prevent axial movement of the carrier socket, ensuring the winding shaft remains in place without direct restriction, thus preventing compression and telescoping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a removable rider or screw connection is used to fix the carrier socket, then the carrier socket can be secured against axial indentation, but the device becomes difficult to install in confined spaces or cumbersome to use
Solution Approach 1:
The safety device is segmented into two functional parts: a stop surface integrated into the hollow shaft and a counter-stop pin integrated into the side part. This segmentation allows each component to perform its function independently without requiring complex assembly mechanisms like riders or screw connections, thereby maintaining reliability while improving ease of operation.
Solution Approach 2:
The stop surface and counter-stop pin are designed to automatically engage and disengage without requiring manual intervention for securing or loosening. The counter-stop pin can be freely moved to adjust the axial position of the hollow shaft, and the stop surface automatically limits the axial movement when the pin is in the securing position, making the device self-regulating and easy to operate.
2Adaptability or versatility
If the carrier socket is resiliently supported and prestressed into the telescoped position, then the winding shaft can be assembled at an angle, but the winding shaft may be undesirably compressed during operation
Solution Approach 1:
The stop surface and counter-stop pin are pre-configured to provide preliminary anti-action against unwanted compression of the winding shaft. The stop surface on the hollow shaft and the counter-stop pin on the side part are positioned to automatically prevent axial indentation of the carrier socket during operation, counteracting the compressive forces that may arise from wind loads or other external factors before they can cause instability.
Solution Approach 2:
The safety device incorporates dynamic elements that allow the hollow shaft to be freely movable axially relative to the side part, enabling the winding shaft to be assembled at an angle. The counter-stop pin can be freely moved to adjust the axial position, and the spring mechanism allows the carrier socket to be resiliently supported, providing adaptability during assembly while maintaining stability during operation through the stop surface and counter-stop pin configuration.
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
The solution provides a simple, cost-effective, and accessible means to secure the winding shaft, preventing unwanted compression and telescoping, even under wind loads, by limiting axial movement and ensuring the carrier socket remains in position, thus enhancing operational stability and ease of assembly.
Implementation Method 1
The carrier socket, which forms a bearing pin for hanging the winding shaft on the side part of the roller shutter box, is supported in an axially movable manner via a spring in the winding shaft or the hollow shaft
Implementation Method 2
the bearing provided for this purpose on the side part and can press with the winding shaft onto the carrier socket
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a building opening shading device, comprising a winding shaft (10) and a curtain that can be wound up and unwound thereon, which in its operating position is supported at its end face against two building-fixed side parts (1, 11), in particular against two side parts (1, 11) of a box enclosing the winding shaft, wherein the winding shaft (10) is designed as a hollow shaft (10) which is provided at at least one end with a support sleeve (6) by means of which the winding shaft (10) is supported against the side part (1) there, wherein the support sleeve (6) is axially displaceable in the hollow shaft (10) so that the winding shaft is telescopically extendable between an operating position and a compressed assembly position, and with a locking device (4, 5) to secure the winding shaft (10) in its operating position against unwanted compression.The invention is characterized in that the locking device (4, 5) has an axially outwardly projecting stop surface on the end face of the hollow shaft (10) surrounding the support sleeve (6), and a counter-stop pin (41) projecting towards the hollow shaft on the associated side part (1) with a counter-stop surface facing the stop surface, which, in a locking position in which the counter-stop pin (41) is at radial height of the stop surface, prevents or at least limits the insertion of the support sleeve (6) into the hollow shaft (10), wherein the counter-stop pin (41) is movable out of its locking position.