Battery Powered Roller Blind Winding Shaft Design
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Solution Overview
Problem
Motorized screening devices for windows, especially those mounted in remote or hard-to-reach locations like roof windows and skylights, face challenges with battery and control board maintenance due to harsh environments, making it difficult to service or replace these components when they are mounted in end brackets.
Innovation Solution
A screening device design where the electrical motor, energy storage, and control board are housed within the reel means, with a rotary encoder and operation interface integrated to allow for manual operation, remote control, and automated positioning, reducing the need for external wiring and enabling easier maintenance by forming a single power module and using a plug-and-socket connection for the power module and motor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery and control board are mounted in the end bracket, then the screening device can be powered and controlled, but the components become difficult to service or replace during the life of the device
Solution Approach 1:
The control board is divided into two functional segments: the encoder interface remains integrated with the motor in the reel means, while the operation interface is separated and mounted on the screening means. This segmentation allows the operation interface to be accessible for servicing while maintaining reliable control functionality.
Solution Approach 2:
The encoder interface acts as an intermediary between the motor and the operation interface. It transmits control signals and position feedback through the screening means, enabling communication between the separated components without requiring direct physical connection between the motor and operation interface.
2Ease of operation
If the operation interface is mounted separately from the printed circuit board, then accessibility is improved, but internal wiring is required which increases manufacturing costs
Solution Approach 1:
The encoder interface is designed with multi-functionality, serving both as the position sensing interface for the motor and as the operation interface for user interaction. This universal design eliminates the need for separate wiring while maintaining accessibility through the screening means.
Solution Approach 2:
The encoder interface replicates the functionality of a separate operation interface by providing button inputs and display outputs through the existing encoder communication protocol, eliminating the need for duplicate wiring infrastructure.
3Device complexity
If the motor is located in the reel means, then wiring is reduced, but it becomes difficult to power the motor from the power grid
Solution Approach 1:
The motor is designed to be self-powered through the encoder interface that draws power from the battery through the screening means. This self-service arrangement eliminates the need for external power grid connection while maintaining motor functionality through the existing power distribution system.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
Disclosed is a screening device (1) for screening an architectural opening (2) such as a window. The screening device (1) comprises screening means (10) for screening at least a part of the architectural opening (2) and reel means (7) arranged to be rotated around a longitudinal rotational axis by means of an electrical motor (6) powered by an electrical energy storage (24) and controlled by control means (15) including a printed circuit board (14). A first end (11) of the screening means (10) is connected to the reel means (7) so that the screening means (10) can be rolled of or rolled up around the reel means (7) dependent on a rotational direction of the reel means (7). The screening device (1) further comprises bracket means (5) for connecting the reel means (7) to the architectural opening (2). The electrical motor (6), the electrical energy storage (24) and the printed circuit board (14) are all arranged substantially inside the reel means (7), wherein an operation interface (4) mounted at a first end (3) of the printed circuit board (14) is arranged at a first end (18) of the screening device (1) and wherein a rotary encoder part (8) mounted at a second end (19) of the printed circuit board (14) engages an output shaft (20) of the electrical motor (6).