Integrated Weight Protrusion for Physical Quantity Detector Bonding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing physical quantity detectors require multiple bonding steps and alignment processes to attach a weight to a movable part, which complicates manufacturing and can lead to alignment accuracy issues and increased stress in the bonding area due to the use of multiple layers of adhesive.
Innovation Solution
A physical quantity detector design where a weight with a main body and a first protrusion, integrally formed, is bonded to the movable part in a single step, using the protrusion to define a gap and function as a stopper, reducing the number of bonding and alignment steps and minimizing adhesive usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a spacer is used to bond the movable part and the mass part, then the gap between the movable part and the mass part is ensured, but the number of bonding steps increases to two
Solution Approach 1:
The spacer structure is merged with the mass part by forming the spacer as an integral part of the mass part. This allows the mass part to directly define the gap while being bonded to the movable part in a single step, eliminating the need for a separate spacer component and reducing bonding steps from two to one.
Solution Approach 2:
The mass part is given multiple functions: it provides the required mass for the detector and simultaneously acts as the spacer to define the gap between the movable part and the fixed part. This multi-functionality eliminates the need for a separate spacer component.
2Strength
If multiple layers of adhesive are used to bond the movable part and the mass part via the spacer, then the bonding is achieved, but the stress in the bonding area increases
Solution Approach 1:
The bonding structure is simplified by merging the spacer function into the mass part itself. This reduces the number of bonding interfaces from two (movable part-spacer and spacer-mass part) to one (movable part-mass part), thereby reducing cumulative stress in the bonding area.
Solution Approach 2:
The spacer component is extracted from the system and its function is integrated into the mass part. This eliminates the intermediate bonding layer and reduces the total adhesive usage and associated stress.
3Ease of manufacture
If bonding processing is performed twice to bond the movable part and the mass part via the spacer, then the assembly is completed, but the manufacturing time and complexity increase
Solution Approach 1:
The manufacturing process is simplified by merging the spacer and mass part into a single integrated component. This allows the bonding operation to be performed once instead of twice, reducing manufacturing time and process complexity.
Solution Approach 2:
The spacer structure is pre-formed as an integral part of the mass part during mass part fabrication. This preliminary integration eliminates the need for subsequent separate bonding operations, streamlining the manufacturing process.
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
This design simplifies the bonding process, reduces the number of alignment steps, and minimizes stress in the bonding area by allowing a single layer of adhesive, while effectively regulating excessive displacement of the movable part and enhancing the detector's resolution.
Implementation Method 1
a physical quantity detection element which is attached to the base member and the movable part, and which detects a physical quantity caused by a stress according to a displacement of the movable part
Data Source
AI summary
A physical quantity detector includes a base member, a movable part coupled to the base member, a physical quantity detection element which is attached to the base member and the movable part, and which detects a physical quantity caused by a stress according to a displacement of the movable part, a supporter configured to support the base member, and a weight bonded to a principal surface of the movable part, wherein the weight includes a main body overlapping the movable part and the supporter when viewed from a perpendicular direction of the principal surface, and a first protrusion which protrudes from the main body toward the movable part, and which is bonded to the movable part, and the main body and the first protrusion are disposed integrally with each other.