Core Body Thermometer Switch Structure for Waterproof Stress Relief
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Solution Overview
Problem
Electronic devices with waterproof switches face stress issues on mounted components due to pressing forces, leading to potential failure and poor contact when operated in water environments.
Innovation Solution
An electronic device design featuring a waterproof structure with an upper exterior body, a lower exterior body, a lining member, and a buffer member, where the operation switch is housed in a sealed space, with the lining member bending to absorb pressing forces and the buffer member compressing to reduce stress on electronic components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the dome switch is sealed in a watertight space to prevent water ingress, then waterproof properties are improved, but pressing force is transmitted to electronic components causing stress and potential failure
Solution Approach 1:
The patent introduces a pressing force receiving member (such as a diaphragm or flexible plate) as an intermediary between the dome switch and the electronic components. This member receives the pressing force when the switch is operated and transmits it to the dome switch mechanism, while isolating the electronic components from direct stress. The intermediary absorbs and redistributes the mechanical load, preventing stress concentration on sensitive electronic components while maintaining the sealed waterproof structure.
2Device complexity
If the dome switch is directly mounted on the wiring substrate, then device complexity is reduced, but pressing force causes poor contact and failure of electronic components
Solution Approach 1:
The pressing force receiving member serves as a mediator between the user's finger and the electronic components. When the user presses the dome switch, the force is first received by this intermediary member, which then converts and transmits the force to the switch mechanism. This indirect transmission protects the electronic components from direct mechanical stress, maintaining reliable electrical contact even during repeated operations.
3Object-affected harmful factors
If a rigid sealing structure is used to protect electronic components, then protection is improved, but operation of the switch becomes difficult
Solution Approach 1:
The patent employs a flexible pressing force receiving member (such as a diaphragm or elastic plate) that can deform under pressure. This flexible structure allows the user's finger to easily press the dome switch by deforming the receiving member, which then transmits the force to the switch mechanism. The flexibility of this thin film or shell structure reduces the operational force required while still providing effective protection to the electronic components behind it.
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 reduces stress on electronic components during switch operation, maintaining waterproof integrity and preventing component failure while allowing easy operation of the switch from the exterior.
Implementation Method 1
the lining member is bent in an operation direction of the operation switch... when the operation switch is operated, the lining member bends in the operation direction (for example, a pressing direction) of the operation switch to receive the pressing force
Implementation Method 2
a buffer member is disposed between the wiring substrate and the lining member... the buffer member is compressively deformed. Therefore, the pressing force associated with the switch operation by the user can be absorbed
Implementation Method 3
an upper exterior body made of a material having waterproof properties; a lower exterior body that makes close contact with the upper exterior body at a peripheral edge portion and forms a space together with the upper exterior body... the wiring substrate on which the operation switch and the electronic components are mounted is housed therein
Data Source
AI summary
A core body thermometer that includes a wiring substrate on which a power supply switch and electronic components are mounted. The power supply switch is housed so as to face a back surface of an upper exterior body in a space formed by the upper exterior body and a lower exterior body. Moreover, a lining member is formed in a thin plate shape and disposed on the back surface of the upper exterior body, and a buffer member is disposed between the wiring substrate and the lining member. The lining member has a through-hole in which the power supply switch is placed in an inner side in a thickness direction when viewed in a plan view, and has flexibility in an operation direction of the power supply switch).