Window Blind Coupling Mechanism for Controlled Release
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Solution Overview
Problem
Conventional cordless window blinds are inconvenient to operate due to the need for users to engage and disengage the control pole with the anti-rotation seat, which can result in sudden release of the blind mechanism, making it difficult to position the blind accurately.
Innovation Solution
A window blind design featuring a coupling mechanism with a transmission unit that can switch between operable and non-operable states, utilizing a resilient member to bias the system into a non-operable state for easy positioning and a control pole to convert the system to an operable state against the resilient force, allowing for controlled release and retraction of the blind unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the control pole is disengaged from the anti-rotation seat to release the blind mechanism, then the blind member can be released and retracted, but the sudden release of the blind mechanism due to its weight causes difficulty in positioning the blind member before release or retraction
Solution Approach 1:
The resilient member is pre-loaded to bias the transmission unit toward the non-operable state before operation. This preliminary action stores energy that automatically engages the stop unit to restrain the linking rod, preventing sudden drops and enabling precise positioning before the user initiates release or retraction operations.
2Reliability
If the control pole is engaged with the anti-rotation seat to prevent rotation, then the blind mechanism can be retained at desired position, but the user must be close to the wall surface to perform engagement and disengagement, causing inconvenience
Solution Approach 1:
The resilient member automatically biases the transmission unit to engage with the stop unit, maintaining the blind mechanism in a restrained state without requiring continuous user intervention. The system self-regulates to prevent rotation and retain position, eliminating the need for users to manually engage or disengage components near the wall surface.
3Measurement precision
If a resilient member is introduced to bias the transmission unit toward the non-operable state, then automatic positioning and prevention of sudden drops is achieved, but the device complexity increases
Solution Approach 1:
The resilient member is integrated within the existing coupling mechanism structure, combining the biasing function with the transmission unit and stop unit. This merging approach achieves automatic positioning and sudden-drop prevention without adding separate complex subsystems, as the resilient member works in conjunction with existing components rather than requiring entirely new mechanisms.
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 simplifies the operation of the window blind by allowing users to easily position and release the blind mechanism without sudden drops, enhancing user convenience and control over the blind's movement.
Implementation Method 1
a resilient member that is disposed for biasing the transmission unit toward the non-operable state
Data Source
AI summary
A window blind includes a stationary seat, a blind mechanism, a coupling mechanism and a control pole. The blind mechanism includes a linking rod mounted to the stationary seat and a blind unit wound on the linking rod. The coupling mechanism includes a transmission unit connected to the linking rod and movable between an operable state and a non-operable state, a stop unit for restraining rotation of the linking rod when the transmission unit is at the non-operable state, and a resilient member for biasing the transmission unit toward the non-operable state. The control pole is connected to the transmission unit and is operable for converting the transmission unit to the operable state against a resilient force of the resilient member.