Retractable Slat Angle Mechanism for Crack-Resistant Blind Packing
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Solution Overview
Problem
Conventional slat angle adjustment mechanisms for Venetian blinds are prone to cracking during the packing process and are inconvenient to use due to the lack of extension, retraction, engagement, and fixation capabilities.
Innovation Solution
A slat angle adjustment mechanism comprising a body shell with a transmission unit, including a gear set and a retractable member that allows for extension, retraction, engagement, and fixation, featuring a stop portion with ribs and a position-limiting hole to stabilize the mechanism during operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional fixed slat angle adjustment mechanism is used, then the structure is simple, but the mechanism is prone to cracking during packing and delivery
Solution Approach 1:
The patent applies the dynamics principle by making the adjustment mechanism retractable rather than fixed. The mechanism can extend when needed for adjustment and retract to a compact position for packing and delivery, eliminating the cracking issue while maintaining operational functionality. This dynamic transformation allows the same mechanism to serve different purposes in different states.
2Ease of operation
If the retractable member is connected to the extendible segment of the screw rod, then the mechanism can be retracted, but the ring hanger moves back to initial position during adjustment operation
Solution Approach 1:
The patent applies the extraction principle by separating the adjustment operation function from the retraction function. The ring hanger is extracted from the retractable member and connected directly to the gear, allowing it to remain stationary during adjustment operations while the retractable member independently performs retraction. This separation resolves the conflict between retraction capability and operational stability.
Solution Approach 2:
The mechanism is segmented into functionally independent components: the gear for adjustment operation, the retractable member for retraction, and the ring hanger for hanging the operating member. This segmentation allows each component to perform its specific function without interfering with others, enabling both retraction and stable adjustment operations simultaneously.
3Stability of the object's composition
If the ring hanger extends to the body shell, then the adjustment operating member can be hung, but the mechanism lacks fixation capability during operation
Solution Approach 1:
The patent uses a simple stop portion structure that provides temporary fixation during adjustment operations. The stop portion acts as a simple mechanical constraint that holds the mechanism in place during use but does not require complex permanent fixation structures. This approach provides sufficient stability for the intended short-duration adjustment operations without adding unnecessary complexity.
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 mechanism enhances the stability and ease of use by allowing extension, retraction, engagement, and fixation, reducing the likelihood of cracking and improving the packing and delivery process while providing smooth adjustment operations.
Implementation Method 1
The transmission gear set 40 has a gear 41 and a screw rod 43 meshing with the gear 41. The retractable member 50 is connected to an extendible segment 431 of the screw rod 43 and undergoes reciprocating motion along the extendible segment 431 of the screw rod 43.
Implementation Method 2
The transmission gear set 40 has a gear 41 and a screw rod 43 meshing with the gear 41.
Data Source
AI summary
A slat angle adjustment mechanism adapted for use with slats of a Venetian blind includes a body shell and a transmission unit. The transmission unit includes a transmission gear set and a retractable member. The transmission gear set has a gear and a screw. A position-limiting hole of the gear corresponds in position to a second through hole of the body shell. The retractable member connects to the extendible segment of the screw and undergoes reciprocating motion along the extendible segment of the screw. Pulling the retractable member from an initial first position of the extendible segment of the screw to a second position of the extendible segment of the screw allows a rib of the body shell to be confined to a limiting portion of the retractable member. Therefore, the slat angle adjustment mechanism is capable of extension, retraction, engagement and fixation.