Sensor Housing Deformable Webs Circuit Board Clamping
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Solution Overview
Problem
Existing sensor housings fail to maintain the circuit board in a stable, gap-free position, leading to light leakage and impaired readings due to manufacturing tolerances and deformation, especially in small dimensions.
Innovation Solution
A housing design with deformable means, such as side webs, that bend into a receiving space upon assembly to securely clamp the circuit board, preventing movement and light leakage, using thermoplastic materials like PA6 or PA66 for injection molding to avoid complex milling processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional rigid housing structures are used to hold the sensor, then the sensor can be supported, but manufacturing tolerances cause gaps and deformation leading to light leakage
Solution Approach 1:
The housing transitions from a rigid structure to a flexible structure made of elastomeric material. This parameter change allows the housing to adapt to manufacturing tolerances and maintain close contact with the circuit board, eliminating gaps that cause light leakage while ensuring reliable sensor readings.
Solution Approach 2:
The patent uses elastomeric material for the housing, which combines flexibility with protective properties. This material choice allows the housing to conform to the circuit board shape, compensating for manufacturing variations and preventing light leakage without requiring high-precision manufacturing.
2Volume of moving object
If the housing is made small to fit the sensor, then the sensor can be compact, but deformation occurs leading to gaps and light leakage
Solution Approach 1:
The housing material is changed from rigid to elastomeric, which allows the small housing to flex and conform to the circuit board without deforming. This enables compact dimensions while maintaining precise fit and preventing light leakage that would occur with rigid materials of the same size.
3Stability of the object's composition
If deformable means are added to secure the circuit board, then the circuit board can be held firmly, but the device complexity increases
Solution Approach 1:
The securing function is merged into the housing structure itself through the flexible elastomeric material that conforms to and holds the circuit board. This eliminates the need for separate securing mechanisms, maintaining structural simplicity while achieving stable circuit board positioning.
Solution Approach 2:
The flexible housing material automatically adapts to the circuit board shape and provides securing function through its inherent elasticity. The housing serves both protective and securing functions simultaneously, avoiding the need for additional complex securing components.
Data Source
AI summary
A housing for a sensor, comprising a housing upper part and a housing lower part which, in the assembled state, form a receiving space which is suitable to receive a circuit board, which, with regard to the object of specifying a housing for a sensor which receives a circuit board as far as possible in the correct position and protects the latter as reliably as possible against undesired movements relative to the housing is characterized in that deformable means are assigned to the housing upper part and/or the housing lower part which, in the assembled state of the housing parts, are bent into the receiving space.