Elastomeric Crown Contact Structure for Wearable ECG Reliability
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Solution Overview
Problem
Existing wearable devices with ECG sensors face complexity in the connection structure between the crown and the ECG sensor, which complicates the formation of a detection circuit for accurate biological data measurement.
Innovation Solution
An electronic device with an elastomeric member that includes a first and second connection, where the first connection is electrically connected to the circuit board and the second connection is abutted on a key, allowing for two levels of deformation to establish a reliable electrical connection with the trigger structure, enabling the device to be worn on a user's body for biological data measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the crown is configured as the second measuring electrode of the ECG sensor, then the ECG measurement function is achieved, but the connection structure between the crown and the ECG sensor becomes complicated
Solution Approach 1:
The patent combines the key structure with the ECG sensor connection structure. The key is integrated with the elastomeric member that serves as both a mechanical input component and an electrical connection component. The first connection part of the elastomeric member connects to the ECG sensor while the second connection part connects to the key, merging multiple functions into a single integrated structure that reduces overall complexity.
Solution Approach 2:
The elastomeric member serves multiple functions simultaneously: it acts as a mechanical connector between the key and the ECG sensor, provides electrical connection through its conductive material, and enables the key's pressing action to be transmitted to the trigger structure. This multi-functionality reduces the need for separate components and simplifies the overall connection structure.
2Reliability
If the elastomeric member is designed to be conductive to enable ECG measurement, then electrical conductivity is achieved, but the fatigue life and service life of the key and elastomeric member are reduced due to deformation
Solution Approach 1:
The elastomeric member is designed as a dynamic component that can deform elastically when the key is pressed and then return to its original shape. The first connection part can deform relative to the housing to approach the trigger structure, and the second connection part can deform relative to the first connection part to switch between contact and non-contact states with the trigger structure. This dynamic design allows the component to accommodate repeated pressing actions while maintaining electrical conductivity.
Solution Approach 2:
The elastomeric member utilizes changes in its physical state (deformation) to achieve different functional states. When the key is pressed, the elastomeric member deforms to establish electrical contact with the trigger structure; when the key is released, it returns to its original shape and disconnects. This parameter change approach allows the same component to serve both as a mechanical input device and an electrical switch, reducing wear compared to rigid contact mechanisms.
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 solution simplifies the connection structure, enhances the reliability of ECG measurements by maintaining conductivity through the elastomeric member, and increases the fatigue life and service life of the key and elastomeric member by distributing deformation effectively.
Implementation Method 1
When the key is pressed, the elastomeric member is capable of generating two levels of deformation
Data Source
AI summary
The present disclosure relates to an electronic device and a wearable device with an elastomeric member. The electronic device includes a housing, a key, a circuit board, a trigger structure and the elastomeric member. The key is connected to the housing and movable relative to the housing when pressed. The circuit board is connected to the housing. The trigger structure is electrically connected to the circuit board. The elastomeric member includes a first connection and a second connection, the first connection being electrically connected to the circuit board, the second connection being abutted on the key. The key, the first connection, and the second connection are conductive to the circuit board. When the key is pressed, the elastomeric member is capable of generating two level of deformation and causing the second connection to switch from a state spaced apart from the trigger structure to a state contacting the trigger structure.