Cordless Blind Control Mechanism for Slat Tilt and Lift
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Solution Overview
Problem
Conventional cordless blinds cannot tilt their slats, and existing control mechanisms pose a risk to children due to hanging lift cords.
Innovation Solution
A control mechanism for cordless blinds that includes a transmission unit with a transmission cable connected to a scrolling rod, a scrolling unit with scrolling cables, and a tilt unit with tilt cables and a tilt wand, allowing for both vertical movement and tilting of slats without cords.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a lift cord is used to control slat movement, then the user can easily move the slats upward or downward, but it creates a potential safety risk for children due to hanging cords
Solution Approach 1:
The invention extracts and removes the hazardous lift cord from the blind system entirely. Instead of using a hanging cord for slat movement control, the patent implements a cordless mechanism where the control wand operates independently within the head assembly, eliminating the safety hazard while preserving operational functionality
Solution Approach 2:
The invention replaces the traditional mechanical cord-pulley system with an alternative mechanical system using a control wand, gear mechanism, and cable assembly contained within the head. This substitution eliminates the need for external hanging cords while achieving the same slat movement control function
2Object-affected harmful factors
If a conventional cordless blind mechanism is used, then the safety risk from hanging cords is eliminated, but the slats cannot be tilted
Solution Approach 1:
The invention integrates multiple functions into a single cordless control system. The control mechanism simultaneously provides both slat movement control (via the first cable assembly and gear) and slat tilting control (via the second cable assembly and tilt wand), enabling the blind to perform multiple operations without requiring separate cords or mechanisms
Solution Approach 2:
The invention segments the control functions into distinct operational pathways: one pathway (control wand rotating gear) for slat movement and another pathway (tilt wand rotating tilt member) for slat tilting. This segmentation allows independent control of each function while maintaining a unified cordless design
3Adaptability or versatility
If a control mechanism with multiple cables and components is implemented, then both slat movement and tilting can be controlled, but the device complexity increases
Solution Approach 1:
The invention merges the control functions for slat movement and tilting into a single integrated head assembly. Both the control wand for movement and the tilt wand for tilting are housed within the same head, sharing common structural elements and mounting points, which consolidates complexity rather than distributing it across separate mechanisms
Data Source
AI summary
A control mechanism for a cordless blind includes a transmission unit, a scrolling unit and a tilt unit. The transmission unit has a transmission cable which is connected with a scrolling rod. The scrolling unit includes two scrolling cables which have respective one of two ends thereof wrapped to two ends of the rod, and the other end of each scrolling cables extends through the top rail, extends through parallel slats and is connected to a bottom rail. The tilt unit includes a tilt member with two tilt cables connected to two ends thereof the tilt member, the other end of the tilt cable extend through the top rail and are connected to the parallel slats. A tilt wand is used to rotate the tilt member to move the tilt cables moved upward and downward so as to tilt the slats.