Telescopic Window Covering Handle With Rack-and-Pinion Drive
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Solution Overview
Problem
Existing window covering operating devices, such as those for roller blinds and vertical blinds, pose safety hazards due to endless loops of cord or chain, which can entangle and cause injuries, and are difficult to operate, especially for children and elderly or infirm individuals, as they often become entangled and hard to disentangle.
Innovation Solution
A telescopically extendable and retractable handle with a rack and pinion mechanism that converts linear movement into rotational movement, eliminating the need for cord or chain loops, allowing safe and easy operation of window coverings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an endless loop of cord or chain is used to operate window coverings, then the window covering can be moved, but safety hazards arise due to entanglement risks
Solution Approach 1:
The patent removes the harmful endless loop of cord or chain from the system entirely. Instead, it uses a telescopic handle that converts linear motion to rotational motion through a rack and pinion mechanism, eliminating the entanglement hazard while maintaining the ability to operate the window covering
Solution Approach 2:
The patent replaces the traditional cord/chain loop mechanical system with a telescopic handle and rack and pinion mechanism. This substitution transforms the operating principle from loop-based pulling to linear-to-rotational motion conversion, eliminating safety hazards
2Adaptability or versatility
If multiple endless loops of cord or chain are provided for operating window covering and slat orientation, then both functions can be controlled, but the loops become entangled with each other
Solution Approach 1:
The patent removes multiple cord/chain loops from the system and replaces them with a single telescopic handle that integrates both control functions. The handle's linear motion is converted to rotational motion that simultaneously controls both the window covering and slat orientation
Solution Approach 2:
The patent combines multiple control functions (window covering operation and slat orientation) into a single telescopic handle mechanism. This merging eliminates the need for separate loops, preventing entanglement while maintaining full control capability
3Ease of operation
If an endless loop of cord or chain is used, then the window covering can be operated, but the device becomes a safety hazard for children
Solution Approach 1:
The patent extracts and removes the harmful cord or chain loop from the system. The replacement telescopic handle with rack and pinion mechanism provides the necessary operational function without creating any hanging or entanglement hazards for children
Solution Approach 2:
The patent eliminates the harmful aspect (cord/chain loop) and replaces it with a mechanism that provides the same functional benefit without the hazard. The telescopic handle converts linear motion to rotational motion, achieving window covering operation without any safety risks
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 entanglement hazards and simplifies operation, making it easier for users with reduced dexterity to manage window coverings without the complexity of multiple cord or chain loops.
Implementation Method 1
means for converting linear telescopic movement of the handle to rotational movement for moving the window covering
Data Source
AI summary
An operating device 10 for a window covering, comprising a telescopically extendable and retractable handle 12 and means for converting linear telescopic movement of the handle to rotational movement for moving the window covering. Preferably, the movement converting means includes a rack and pinion mechanism 22, 30 supported by a support member 14 of the operating device 10, one end of a rack 22 element of the rack and pinion mechanism being attached to a distal part of the telescopic handle 12, and a pinion gear 30 being provided on the support member 14 and drivable by the rack element 22.