Roller Blind Idler End Ring Structure for Noise Reduction
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Solution Overview
Problem
Conventional roller blinds produce undesirable noise during the rotation of their components, which is a significant drawback in terms of user experience and functionality.
Innovation Solution
The idler end for a roller tube incorporates a housing with a specific bore structure, a fastener, a shaft with a pin and receiver, and a biasing member, along with a ring member that reduces noise by minimizing friction between the biasing member and the shaft's shoulder during rotational movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If conventional roller blind components are used, then the structure is simple and easy to manufacture, but noise is generated during rotational movement
Solution Approach 1:
A ring member is introduced as an intermediary component between the biasing member and the shaft's second shoulder. This ring member acts as a mediator that reduces frictional contact and noise generation during rotational movement, while the fastener head serves as another intermediary between the passageway and the shaft to limit extension and stabilize the assembly.
Solution Approach 2:
The patent modifies the contact surface parameters by providing a machined, polished, or friction reducing surface on the ring member where it contacts the shaft's second shoulder. This parameter change in surface finish and friction characteristics directly reduces noise generation during operation.
2Object-generated harmful factors
If friction reduction measures are implemented, then noise is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent applies surface treatment (machining, polishing, or friction reducing coating) to the ring member's contact surface. While this adds some manufacturing steps, it directly addresses the noise reduction goal by modifying the friction parameters of the contact surface between the ring member and the shaft's second shoulder.
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 effectively reduces noise generation during the operation of roller blinds by minimizing frictional contact between the biasing member and the shaft's shoulder, enhancing the operational quietness and user experience.
Implementation Method 1
a biasing member positioned between said exterior face of said partition of said housing and said second shoulder to longitudinally bias said pin portion away from said housing
Implementation Method 2
a helical spring surrounding said shaft and positioned between said exterior face of said partition of said housing and said second shoulder
Implementation Method 3
said ring member in contact with said biasing member on a first side and in contact with said second shoulder on a second side, said ring member reducing the generation of noise created through rotational movement of said biasing member relative to said second shoulder
Implementation Method 4
said ring member having a machined, polished, or friction reducing surface on at least said second side contacting said second shoulder
Data Source
AI summary
An idler end for a roller tube of a roller blind. The idler end includes a housing having a bore therethrough, an internal partition and a generally cylindrical passageway extending through said partition. The passageway has an internal first should for engagement with a fastener. The idler end includes a shaft having (i) a pin portion for engagement with the roller blind, (ii) a receiver configured to pass through the passageway and for engagement with said fastener, and (iii) a second shoulder between the pin portion and the receiver end, and a biasing member configured to longitudinally bias said pin portion away from said housing. The idler end further includes a ring member surrounding said shaft positioned between said second shoulder and said biasing member, the ring member reducing the generation of noise created through rotational movement of said biasing member relative to said second shoulder.