Window Blind Slat Attachment Using Concealed Coupling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Mechanisms for tilting Venetian blind slats often result in visible openings and allow unwanted light to penetrate, compromising privacy and light control.
Innovation Solution
A window treatment system featuring a headrail, weighting element, slats, ladder cords, and couplings, where the slats are removably attached to ladder rungs using clips with compliant members that secure the rungs, hiding the attachment points when the blinds are closed, allowing for easy replacement and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional slat attachment mechanisms are used, then the slats can be secured to the ladder rungs, but the attachment points become visible when blinds are closed, reducing privacy and allowing unwanted light penetration
Solution Approach 1:
The attachment mechanism is divided into separate components: a coupling member with compliant legs that attaches to the slat, and a separate attachment point on the ladder rung. This segmentation allows the attachment to be made while keeping the connection points concealed within the slat thickness or behind adjacent slats when closed.
Solution Approach 2:
The coupling member is designed to be received within a hole in the slat, with the compliant legs nesting inside the slat body. This nesting conceals the attachment mechanism within the slat itself, preventing visible openings when the blinds are closed.
2Reliability
If permanent attachment methods are used, then the slats remain securely fixed to the ladder rungs, but replacement and maintenance of slats becomes difficult and may damage the ladder rungs
Solution Approach 1:
The coupling member incorporates compliant (flexible) legs that can be dynamically deformed. During installation, the legs are compressed to pass through the slat hole, then expand to lock the slat to the rung. During removal, the legs are compressed again to release the slat, enabling easy replacement without damaging the rigid ladder rung.
Solution Approach 2:
The physical state of the coupling member changes between installed and removed states. The compliant legs transition from an expanded locked position to a compressed released position, allowing the same component to provide both secure fixation and easy removal functionality.
3Ease of operation
If visible attachment mechanisms are used, then the installation process is simple, but the aesthetic appearance and privacy are compromised when blinds are closed
Solution Approach 1:
The attachment function is extracted from the visible surface of the slat and relocated to concealed positions. The coupling member is received within a hole in the slat, and the attachment points are positioned so that when blinds are closed, the connection points are hidden within the slat thickness or behind adjacent slats, eliminating visible openings.
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
Enhances privacy and light control by concealing attachment points and enabling easy slat replacement without damaging the ladder rungs, ensuring consistent performance and aesthetics.
Implementation Method 1
The two compliant members may be curved such that when a portion of the coupling is received within the hole, the compliant members are proximate to each other within the hole and distal portions of the compliant members abut the upper surface of the slat. The distal portions of the compliant members may be configured to be pushed together to enable the clip to be removed from a lower surface of the slat.
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
A window treatment may include a headrail, a weighting element, a plurality of slats, one or more first ladder cords, one or more second ladder cords, a plurality of ladder rungs, and one or more couplings. The plurality of slats may be located between the headrail and the weighting element. Each of the plurality of slats may include an upper surface and a lower surface. The plurality of ladder rungs may extend between a first ladder cord and a second ladder cord. The lower surface of each of the plurality of slats may rest on a respective ladder rung of the plurality of ladder rungs. The one or more couplings may be configured to be attached to respective slats of the plurality of slats. The coupling may be configured to be removed such that the slat can be removed from the window treatment.