Sensor Device Recessed Electronic Component Separation
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Solution Overview
Problem
Existing sensor devices face interference issues between electronic components and the lid body, leading to inaccurate preload of laminated piezoelectric elements, which deteriorates acceleration detection characteristics.
Innovation Solution
A sensor device design featuring a recessed section with a larger separation distance between electronic components and the lid body, along with a taper-shaped connecting section that allows deformation and restricts further downward deflection, preventing contact and ensuring accurate preload and improved reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If electronic components are placed in the recessed section, then the device can be compact, but the lid body interferes with the electronic components preventing accurate preload
Solution Approach 1:
The patent positions electronic components in the recessed section such that their projection overlaps with the lid body's projection, utilizing vertical spatial arrangement to achieve compactness while maintaining functional separation through the recessed depth
Solution Approach 2:
The recessed section acts as an intermediary space that accommodates electronic components while the connecting section serves as a mediator that transmits preload force to the force detecting section without transmitting interference to the electronic components
2Stability of the object's composition
If the lid body is made rigid to maintain structure, then structural stability is improved, but deformation is restricted preventing contact prevention with electronic components
Solution Approach 1:
The lid body employs different structural characteristics in different regions: the connecting section has a taper shape that allows controlled deformation, while other portions maintain rigidity for structural stability, creating local quality differentiation
Solution Approach 2:
The lid body transitions from a purely rigid structure to a dynamic structure where the connecting section can deform under load to accommodate dimensional changes, allowing the structure to adapt while maintaining overall stability
3Reliability
If the separation distance between electronic components and lid body is increased, then interference is prevented, but device volume increases
Solution Approach 1:
The patent utilizes the vertical dimension by placing electronic components in a recessed section, allowing their projection to overlap with the lid body while maintaining a sufficient separation distance in the vertical direction, thus preventing interference without increasing horizontal volume
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 design effectively prevents interference between the lid body and electronic components, allowing for precise preload of the force detecting section, enhancing force detection characteristics and reliability by maintaining the separation distance and preventing damage or peeling.
Implementation Method 1
a force detecting section disposed in the recessed section and configured to output an electric charge according to a received external force
Data Source
AI summary
A sensor device includes a base body including a recess, a lid body configured to close an opening of the recess, a force detection element disposed in the recess and configured to output an electric charge according to a received external force, and an electronic component disposed in the recess and electrically connected to the force detection element. A separation distance between the electronic component and the lid body is larger than a separation distance between the force detection element and the lid body in the thickness direction of the lid body.