Vertical Blind Drive Mechanism Eliminates Strangulation Hazards
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Solution Overview
Problem
Conventional vertical window blinds pose safety risks due to long blind strings or chains that can cause strangulation and suffocation, especially for children, and require separate controls for slat operation, increasing the risk of accidents.
Innovation Solution
A drive device for vertical window blinds that uses a driving connecting rod to receive rotational force and convert it into horizontal motion to operate slats, eliminating the need for blind strings or chains and incorporating torque-limiting and clutch mechanisms to control slat opening and tilting, ensuring safety and convenience with a single operating device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If blind strings or chains are used to operate vertical window blinds, then ease of operation is improved, but safety is worsened due to strangulation and suffocation risks
Solution Approach 1:
The patent removes the blind string or chain from the system entirely, extracting the harmful element that causes strangulation risks. Instead, it uses a blind box mechanism with internal components (driving connecting rod, driving screw rod, transmission rods) that operate without exposed loose elements, thereby eliminating the safety hazard while maintaining operational functionality.
Solution Approach 2:
The patent introduces an intermediary mechanism (the blind box with driving connecting rod and transmission rods) that mediates between the user's operating device and the slats. This intermediary system transfers the operating force through enclosed mechanical components rather than exposed strings, achieving both safety and operational effectiveness.
2Measurement precision
If separate blind strings or chains are used for sliding and tilting slats, then control precision is improved, but device complexity and safety risks are worsened
Solution Approach 1:
The patent merges the functions of sliding and tilting control into a single integrated blind box mechanism. The driving connecting rod receives force from one operating device and simultaneously controls both the sliding (via driving screw rod) and tilting (via open-and-close and angle transmission rods) functions, reducing complexity while maintaining precise control through coordinated mechanical transmission.
Solution Approach 2:
The blind box mechanism serves multiple functions: it controls both sliding and tilting operations, integrates force transmission from a single operating device, and provides torque limitation protection. This multi-functional design eliminates the need for separate control systems while maintaining comprehensive slat control capability.
3Device complexity
If a single operating device controls both sliding and tilting, then device complexity is reduced, but control precision and reliability are worsened
Solution Approach 1:
The patent segments the control functions within the single operating device by using distinct transmission paths: the driving connecting rod separately engages the driving screw rod for sliding control and the transmission rods for tilting control. This segmentation within integration ensures that each function operates reliably through dedicated mechanical pathways while maintaining overall system simplicity.
Solution Approach 2:
The patent incorporates dynamic control elements including torque-limiting mechanisms and clutch mechanisms that adaptively manage force transmission. These dynamic features allow the single operating device to reliably control both functions by automatically adjusting power distribution based on operational conditions, preventing interference between sliding and tilting operations.
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 enhances safety by eliminating the risk of strangulation and simplifies operation, allowing for single-device control of slat opening and tilting while preventing damage from excessive torque, thus prolonging the device's service life.
Implementation Method 1
a driving screw rod having a second connecting portion and a driving screw gear, the second connecting portion being provided at one end of the driving screw rod, the driving screw gear being formed on a peripheral surface of the driving screw rod
Implementation Method 2
the receiving pin is used to receive a window blind operating device so as to axially rotate in a vertical direction by a rotational driving force from the window blind operating device
Data Source
AI summary
Disclosed is a drive device for a vertical window blind, comprising: a driving connecting rod, a driving screw rod and an open-and-close transmission rod connected with a slat open-and-close control screw of the vertical window blind, wherein the driving connecting rod drives the slat open-and-close control screw to axially rotate in the horizontal direction by the rotational driving force via the driving screw rod and the open-and-close transmission rod, thereby moving a plurality of slats slidably disposed on the slat open-and-close control screw in the horizontal direction.