Sun-Protection Screen Drive Sealing for Protected Electronics
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Solution Overview
Problem
Existing automatic drive devices for sun-protection screens face challenges in sealing electronic components from water infiltration due to mobility issues and dimensional inaccuracies, leading to potential damage from bad weather.
Innovation Solution
A device with a gear motor unit and a partitioned structure that securely mounts the electronic processing unit away from the rotatable parts, using a one-piece head with a partition to create sealed compartments for the motor and electronic components, ensuring hermetic sealing and easy assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a tight partition is introduced to separate electronic components from water-prone areas, then water infiltration is prevented and reliability is improved, but device complexity increases due to additional partition structures and compartmentalization
Solution Approach 1:
The device is divided into distinct compartments: a first compartment housing electronic components and a second compartment for water-prone mechanical elements. A tight partition separates these compartments, preventing water infiltration while maintaining functional separation. This segmentation protects sensitive electronics without isolating them completely from the mechanical system.
Solution Approach 2:
The tight partition is integrated within the existing device structure, nested between the electronic components and the water-prone mechanical elements. The partition forms an internal barrier that fits within the overall device geometry, avoiding external additions and minimizing structural complexity while achieving effective compartmentalization.
2Adaptability or versatility
If clearances are increased to accommodate manufacturing imprecisions and thermal expansion, then adaptability is improved, but tightness deteriorates due to potential water infiltration paths
Solution Approach 1:
Different regions of the device have different clearance requirements. The tight partition creates a localized sealed region around electronic components where minimal clearances are needed for tightness. Other regions can maintain larger clearances to accommodate manufacturing imprecisions and thermal expansion, achieving both tightness where needed and adaptability where required.
Solution Approach 2:
The tight partition acts as an intermediary barrier between water-prone mechanical elements and sensitive electronic components. It allows the system to maintain clearances for adaptability while preventing water infiltration paths, mediating between the conflicting requirements of tightness and adaptability.
3Reliability
If O-rings are used to improve tightness between the ring and fixed head, then water infiltration is reduced, but device complexity and assembly difficulty increase due to adjustment requirements
Solution Approach 1:
The tight partition extracts the tightness function from the interface between the ring and fixed head, creating a separate sealed compartment for electronic components. This removes the need for complex O-ring arrangements and adjustments at that interface, simplifying both the device structure and assembly process while maintaining reliable tightness.
4Adaptability or versatility
If the ring is made mobile to compensate for expansion and match various tubes, then adaptability is improved, but tightness worsens due to difficulty in sealing around moving parts
Solution Approach 1:
The device is segmented into a sealed first compartment for electronics and an open second compartment for the mobile ring. The tight partition creates a barrier that allows the ring to move freely in its compartment without compromising the tightness of the electronic components compartment, enabling both adaptability and tightness.
Data Source
AI summary
A device including a tube for winding and unwinding a screen which is controlled in rotation by a gear motor and which is supported on a fixed head and wherein a rotational part mounted within the tube is kinematically linked to rotate with the tube with the part including elements that are used to reflect a position of the rotational part and which elements are detected by senors that are connected to an electronic processing unit. A tightly sealed partition secured to the head is further provided to define, on one side, a first compartment for receiving at least the rotational part and, on the other side, a second compartment for receiving at least the electronic processing unit.