Resilient Arm Cord Guide Mounting
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Solution Overview
Problem
Conventional window blind assemblies face instability in mounting cord guiding devices due to adhesive loss of bonding strength, making the process inconvenient and troublesome, especially in narrow accommodating spaces.
Innovation Solution
A cord guiding device with a wheel holder and guiding wheels, featuring a resilient arm unit and engaging grooves for secure mounting within the accommodating space, allowing easy assembly and stable positioning of the cord guiding device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If adhesive is used to mount cord guiding devices on sidewalls, then mounting operation is simple, but mounting stability deteriorates over time due to adhesive loss of bonding strength
Solution Approach 1:
The patent replaces the chemical bonding system (adhesive) with a mechanical fastening system. The wheel holder includes resilient arms that elastically engage with the sidewalls through elastic deformation, providing mechanical retention instead of chemical adhesion. This mechanical system maintains both ease of installation and long-term stability.
Solution Approach 2:
The patent introduces dynamic elements through resilient arms that can elastically deform. The resilient arms bend to accommodate the sidewalls and then maintain continuous contact pressure, adapting to slight variations in sidewall position while maintaining secure engagement. This dynamic capability ensures stable mounting without requiring precise pre-positioning.
2Reliability
If screw fasteners are used to mount cord guiding devices, then mounting stability is improved, but mounting operation becomes inconvenient and time-consuming
Solution Approach 1:
The patent replaces the complex mechanical fastening system (screws requiring threading and tightening operations) with a simpler elastic engagement system. The resilient arms are pre-formed with specific elasticity, allowing them to automatically engage with the sidewalls through simple insertion, eliminating the need for threading operations and multiple fastening steps.
Solution Approach 2:
The resilient arms perform self-adjustment through elastic deformation. When the wheel holder is inserted, the resilient arms automatically bend to fit the sidewalls and then spring back to maintain secure engagement. This self-adjusting mechanism eliminates the need for precise manual positioning and multiple adjustment operations that would otherwise be required with screw fasteners.
3Volume of moving object
If cord winding operation is performed within narrow accommodating space after mounting, then device structure remains compact, but cord winding operation becomes very troublesome
Solution Approach 1:
The patent divides the cord guiding function into separate components: the wheel holder with resilient arms for mounting, and the guiding wheels with cord winding portions for cord management. This segmentation allows the cord winding operation to be performed on the external guiding wheels rather than within the constrained accommodating space, while the wheel holder remains compact within the space.
Solution Approach 2:
The guiding wheels act as intermediary elements between the cords and the wheel holder. The cords wind on the guiding wheels which are positioned externally, allowing cord winding operations to be performed outside the narrow accommodating space. The guiding wheels transmit the cord forces to the wheel holder while maintaining operational accessibility.
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
Facilitates easy and stable mounting of cord guiding devices, simplifying the assembly process and ensuring secure operation of the window blind assembly by using resilient arm units and engaging grooves to maintain the position of the wheel holder within the accommodating space.
Implementation Method 1
a resilient arm unit that is adapted to resiliently abut against the sidewalls of the securing seat so as to mount the wheel holder in the accommodating space
Data Source
AI summary
A window blind assembly includes a securing seat, a blind unit, a blind control device and two cord guiding devices interposing the blind control device. Each of the cord guiding devices includes a wheel holder and a guiding wheel. The wheel holder includes a resilient arm unit and two holder walls. Each of the holder walls is formed with an engaging groove having a receiving portion and a constricted portion. The guiding wheel includes two axle portions rotatably and respectively received in the receiving portions of the engaging grooves in the holder walls, and a cord winding portion interconnecting the axle portions and permitting winding of a corresponding cord thereon.