Perpendicular Roller Shade Actuation Device with Bevel Gears
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Solution Overview
Problem
Current roller shade actuation devices occupy a large volume due to parallel arrangement of components and complex assembly structures, which limits their space efficiency and usability.
Innovation Solution
A roller shade actuation device with a driver and transmission mechanism where the output shaft is perpendicular to the shaft, utilizing bevel gears and a gear box with a simple and compact design to reduce volume and enhance power transmission, including multiple plane scroll springs for effective power output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the output shaft and shaft are arranged in parallel with flat scroll springs, then the power transmission is achieved, but the occupied volume becomes large and the assembly structure becomes complicated
Solution Approach 1:
The patent changes the spatial arrangement from parallel (same dimension) to perpendicular (different dimension). The output shaft is arranged perpendicular to the shaft, and the scroll springs are positioned in the radial direction rather than parallel to the shaft, utilizing three-dimensional space more efficiently to reduce overall device volume while simplifying the assembly structure.
Solution Approach 2:
The patent integrates multiple components into a more compact configuration. The scroll springs are mounted directly on the winding drum in the radial direction, and the transmission mechanism combines the driver, transmission gear, and shaft into a vertically arranged compact unit, merging functions that were previously separated in the parallel arrangement.
2Volume of moving object
If the output shaft and shaft are arranged in parallel, then the power transmission path is straightforward, but the overall device takes up great volume
Solution Approach 1:
The transmission mechanism transitions from a horizontal parallel arrangement to a vertical perpendicular arrangement. The output shaft extends in the vertical direction while the shaft extends horizontally, creating a compact L-shaped configuration that reduces the device footprint without compromising power transmission capability.
Solution Approach 2:
The transmission gear acts as an intermediary component that efficiently transfers power between the vertically oriented output shaft and the horizontally oriented shaft. This intermediate element enables the perpendicular arrangement while maintaining effective power transmission, resolving the conflict between compact volume and transmission efficiency.
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 compact design allows for efficient power transmission and reduced occupied volume, simplifying the structure and assembly while maintaining effective operation of the roller shade mechanism.
Implementation Method 1
The transmission mechanism includes a first transmission gear meshed with the driving gear, a synchronous gear coaxial with and relatively fixed to the first transmission gear, and a fixed gear fixed to the shaft and meshed with the synchronous gear
Implementation Method 2
a spring end, a coil spring, a damper, and a limiter are arranged in order from an end to an opposite end in the winding drum. When the shade body needs to be put down, the shade body only needs to be pulled down, and the shade body will drive the winding drum to rotate and then rotate relative to the coil spring. The coil spring is twisted and deformed to accumulate elastic force.
Data Source
AI summary
A roller shade actuation device includes a driver arranged in a winding drum, a shaft fixed to a support frame outside one end of the winding drum and inserted into the winding drum, and a transmission mechanism for realizing power transmission between the driver and the shaft. The driver includes a housing relatively fixed to the winding drum, a rotation power member arranged in the housing, and a driving gear coaxial with and fixed to an output shaft of the rotation power member. The transmission mechanism includes a first transmission gear meshed with the driving gear, a synchronous gear coaxial with the first transmission gear, and a fixed gear fixed to the shaft and meshed with the synchronous gear. Axial directions of the output shaft and the shaft are vertical, and the synchronous gear and the fixed gear are bevel gears whose axial directions are perpendicular to each other.