Elastic Fixation Member Absorbs Casing Deflection
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Solution Overview
Problem
In electronic devices, rigidly fixing a substrate to the casing causes direct transmission of casing deflection to the substrate, affecting the operation and function of mounted electronic components.
Innovation Solution
An electronic device design featuring a fixation member with a fixation hole and elastic bodies between the casing and substrate, allowing the fixation member to displace and absorb deflection components perpendicular to the substrate, reducing adverse effects on electronic components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the substrate is rigidly fixed to the casing, then the substrate is securely held in position, but the deflection of the casing is directly transmitted to the substrate, adversely affecting the operation and function of electronic components
Solution Approach 1:
The patent introduces a fixation member as an intermediary between the casing and substrate. This fixation member includes a fixation hole that receives a protrusion from the substrate, and an elastic body disposed within the fixation hole. The elastic body acts as a mediator that absorbs deflection forces, allowing the substrate to be held securely while preventing direct transmission of casing deflection to the substrate.
Solution Approach 2:
The patent changes the mechanical parameter of the fixation system from rigid to elastic by introducing an elastic body within the fixation hole. The elastic body has a specific elasticity that allows it to deform and absorb deflection forces, changing the overall stiffness characteristic of the substrate-fixation member-casing assembly to reduce harmful deflection transmission.
2Strength
If the outer periphery of the fixation member is close to the inner periphery of the fixation hole, then the fixation is strong, but the deflection transmission increases
Solution Approach 1:
The elastic body serves as a mediator between the fixation member and the substrate, positioned within the fixation hole. It provides sufficient fixation strength through elastic engagement while simultaneously absorbing deflection forces, preventing direct transmission to the substrate even when the fixation member fits tightly within the fixation hole.
Solution Approach 2:
The elastic body is pre-installed within the fixation hole to provide cushioning before any deflection occurs. This beforehand cushioning allows the system to absorb incoming deflection forces elastically, maintaining strong fixation while preventing harmful stress transmission to the substrate and its mounted components.
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
Effectively restrains deflection transmission from the casing to the substrate, protecting electronic components by allowing displacement and elastic absorption of deflection, thereby reducing operational impacts.
Implementation Method 1
a first elastic body which is disposed in a surrounding area of the fixation hole, and sandwiched between the casing and a front surface of the substrate... it is possible to absorb the component of the deflection, within the elastic range of the elastic body, in the direction perpendicular to the surface of the substrate
Data Source
AI summary
There is provided an electronic device includes a casing; a substrate which is arranged inside the casing, and provided with a fixation hole; a fixation member which is integrally formed with the casing, and inserted into the fixation hole of the casing, and positioned therein so that an outer periphery thereof is apart from an inner periphery of the fixation hole; and a first elastic body which is disposed in a surrounding area of the fixation hole, and sandwiched between the casing and a front surface of the substrate.