Window Blind Frame Assembly Using Mating Segments
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Solution Overview
Problem
Conventional window blind devices require two different forming molds to produce the frame halves and necessitate screws for assembly, making the process complex and costly.
Innovation Solution
A window blind device with a frame composed of two mating frame halves, each with inner and outer surfaces, shaft halves, and spacer halves, allowing for assembly without screws and using the same forming mold, with control wheels mounted on supporting shafts to facilitate the movement of the bottomrail between positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If two different forming molds are used to produce frame halves, then the frame structure can be properly formed, but the manufacturing complexity and cost increase
Solution Approach 1:
The frame is divided into two identical frame halves, each containing shaft halves and spacer halves. These segmented components are designed to be mirror images that mate together, allowing production using the same forming mold while simplifying assembly through modular construction
Solution Approach 2:
The frame halves are designed with universal symmetry, where each half contains all necessary elements (shaft halves, spacers, connecting regions) to function independently and interchangeably. This universality allows a single mold design to produce both frame halves, eliminating the need for separate molds
2Stability of the object's composition
If screws are used to secure frame halves, then the frame structure is stable, but the assembly process becomes more complex and time-consuming
Solution Approach 1:
The frame halves are merged through direct mating engagement using complementary male and female connecting regions. The shaft halves and spacer halves are designed to interlock directly without requiring separate fastening elements, combining the structural connection function into the frame components themselves
Solution Approach 2:
The frame halves possess self-securing capabilities through their complementary connecting regions. The male and female connecting regions automatically align and engage when the frame halves are brought together, allowing the structure to secure itself without external fasteners or additional assembly steps
3Reliability
If traditional frame structures with multiple components are used, then the frame can support control wheels, but the noise during operation increases
Solution Approach 1:
The invention extracts and eliminates the take-up drum component from the traditional window blind mechanism. By removing this component, the source of operational noise is eliminated while the frame halves and shaft halves provide direct support for the control wheels, maintaining reliability without the harmful noise factor
4Strength
If traditional fastening methods are used, then the frame components are securely attached, but the service life is reduced due to fastener wear and failure
Solution Approach 1:
The fastening function is merged into the frame components themselves through the male and female connecting regions. These integral connecting features eliminate the need for separate fasteners that would wear or fail, extending the service life while maintaining secure attachment strength through the designed interlocking geometry
Solution Approach 2:
The frame components provide self-securing through their complementary connecting regions, eliminating the need for external fasteners. This self-service mechanism removes the wear and failure points associated with traditional fasteners, significantly extending the operational life of the frame structure
Data Source
AI summary
A window blind device includes a headrail, a bottomrail, a window shade, a frame, and a plurality of control wheels. The frame includes two frame halves each including a wall body and a plurality of shaft halves. When the frame halves are brought into mating engagement with each other, male and female connecting regions of each of the shaft halves of each of the frame halves matingly fit with the female and male connecting regions of a corresponding one of the shaft halves of the other one of the frame halves, respectively.