Window Covering Control Device Damping Module Expansion Speed
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Solution Overview
Problem
Conventional window covering systems experience rapid expansion of covering materials, leading to damage and elastic fatigue of spiral springs, and require inconvenient manual control to manage expansion speed.
Innovation Solution
A control device with a driving module, lifting module, unlocking module, damping module, and transmission module that regulates the expansion speed of the covering material by providing a damping force during expansion and locking mechanism during collection, allowing for controlled and slow expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the restriction of the bottom rail is removed to expand the covering material, then the covering material can be expanded to achieve light blockage, but the covering material expands rapidly causing damage and elastic fatigue of the spiral spring
Solution Approach 1:
A damping module is introduced as an intermediary component between the bottom rail and the covering material. This damping module includes a damping element that provides controlled resistance during expansion, mediating the force transmission and preventing rapid expansion while still allowing the covering material to expand when needed for light blockage
Solution Approach 2:
The damping module is pre-configured in the system to provide cushioning effect before expansion occurs. The damping element is designed to absorb and dissipate energy during the expansion process, preventing damage before it can occur to the spiral spring or covering material
2Reliability
If an operating cord is used to control the expansion speed of the covering material, then rapid expansion and elastic fatigue can be avoided, but the operation becomes time consuming and inconvenient
Solution Approach 1:
The damping module is designed to automatically regulate expansion speed without requiring manual intervention. The damping element self-adjusts the expansion rate based on the applied force, eliminating the need for users to manually control expansion speed via operating cords while still preventing elastic fatigue
Solution Approach 2:
The manual mechanical control system (operating cord) is replaced with an automatic mechanical system (damping module). The damping element provides passive mechanical resistance that automatically controls expansion speed without requiring user operation, substituting active manual control with passive automatic regulation
3Reliability
If a spiral spring with a larger restoring force is used to overcome elastic fatigue, then the covering material can be completely collected, but the user must apply a greater downward force to remove the restriction of the bottom rail
Solution Approach 1:
The damping module acts as an intermediary that modifies the force interaction between the bottom rail and covering material. During collection, the damping element allows the spiral spring's restoring force to fully act on the covering material for complete collection, while during expansion it provides controlled resistance that reduces the downward force users need to apply
4Productivity
If the bottom rail is allowed to descend rapidly to expand the covering material, then light blockage is achieved quickly, but collision with surroundings causes damage to the window covering system
Solution Approach 1:
The damping module is pre-installed in the system to provide cushioning before collision can occur. The damping element is positioned to engage during descent and provide progressive resistance, cushioning the bottom rail's movement before it can collide with surrounding structures
Solution Approach 2:
The damping element serves as an intermediary between the bottom rail and the surrounding environment. It mediates the force transmission during descent, allowing controlled movement for productivity while preventing harmful collisions through progressive force dissipation
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 control device effectively reduces the expansion speed of the covering material, preventing damage and elastic fatigue, while ensuring complete collection without undesired descending of the bottom rail.
Implementation Method 1
a damping module configured to operate with the winding device simultaneously in only one direction for providing a damping force to the winding device selectively, wherein the damping force is provided to the winding device for reducing the expansion speed of the covering material
Implementation Method 2
a spring having two ends, wherein one end is connected to the drive member to provide a restoring force to the drive member to resist the weight force of the weight member
Implementation Method 3
a weight member attached below the covering material to provide a weight force to the covering material
Data Source
AI summary
A control device reduces an expansion speed of a covering material of a window covering system. The window covering system comprises the control device, the covering material and a weight member attached below the covering material to provide a weight force to the covering material. The control device comprises a driving module, a lifting module comprising a winding device configured to operate with the drive member and the covering material simultaneously, a damping module configured to operate with the winding device in only one direction for providing a damping force to the winding device selectively; wherein the damping force is provided to the winding device for reducing the expansion speed of the covering material when the winding device is rotated in the first direction; and wherein no damping force is provided to the winding device when the winding device is rotated in a second direction opposite to the first direction.