Portable Input Assembly With Overlapping Touch and Push Sensing
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Solution Overview
Problem
Portable sound devices, particularly earbud-type devices, face challenges in accommodating user input units such as batteries, user input units, and other components due to their small size, which complicates the disposition and functionality of these elements.
Innovation Solution
A portable electronic device with a user input unit comprising a first input unit for touch detection and a second input unit for push detection, both mounted on a flexible board within the device's housing, utilizing electrodes and a metal spring to detect variations in electrical fields for input recognition, allowing for efficient use of space and functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the portable sound device is made small (earbud-type), then portability and convenience are improved, but the space for accommodating components such as battery and user input unit is reduced
Solution Approach 1:
The second input unit is disposed inside the first input unit by overlapping them in the plan view, creating a nested configuration where the push detection unit is positioned within the boundaries of the touch detection unit. This nesting approach maximizes the use of limited space in earbud-type devices while maintaining both touch and push input functionalities.
Solution Approach 2:
The patent transitions from a two-dimensional layout to a three-dimensional arrangement by stacking the first and second input units in different layers (front and rear surfaces of the flexible board). This dimensional change allows both input units to coexist in a compact space without interfering with each other, effectively solving the space constraint problem in small portable devices.
2Adaptability or versatility
If multiple input units are added to provide diverse input functions, then user input capability is improved, but the device complexity and space requirements increase
Solution Approach 1:
Both the first input unit (touch detection) and the second input unit (push detection) are mounted on a single flexible board, merging multiple functional units into one integrated substrate. This combining approach reduces structural complexity and simplifies the overall device architecture while maintaining diverse input capabilities.
Solution Approach 2:
The flexible board serves as a universal platform that accommodates both touch and push detection functionalities. By designing a multi-functional input system on a single board, the patent reduces the need for separate structural supports and connection mechanisms, thereby lowering device complexity.
3Area of stationary object
If the first input unit and second input unit are disposed closely or overlapping, then space utilization is improved, but the difficulty of detecting and measuring input forces increases
Solution Approach 1:
A dielectric member is positioned between the first input unit and the second input unit to act as an intermediary element. This dielectric member electrically isolates the two input units while allowing mechanical force transmission, enabling the push input unit to detect input forces without electrical interference from the touch input unit. This mediator resolves the detection difficulty caused by close proximity or overlapping arrangement.
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 enables effective detection of multiple input types, enhances ease of assembly, and maintains stable performance by optimizing the use of limited space within the device, ensuring sufficient user instructions and improved usability.
Implementation Method 1
a first input unit, closely disposed on the inner surface of the housing so as to detect touch input
Implementation Method 2
a second input unit disposed inside the first input unit in the state of overlapping the first input unit so as to detect push input
Implementation Method 3
utilizing electrodes and a metal spring to detect variations in electrical fields for input recognition
Data Source
Figure 1
Figure 2
Figure 3(a)~3(c)
AI summary
A portable electronic device includes a housing, a user input unit configured to detect touch input and push input, and a carrier, on which the user input unit is seated and which is inserted into the housing, wherein the user input unit includes a first input unit, closely disposed on an inner surface of the housing so as to detect touch input, and a second input unit, disposed inside the first input unit in the state of overlapping the first input unit so as to detect push input, the second input unit including a metal spring that changes in shape in response to the push input. The portable electronic device is capable of detecting two types of input and thus of ensuring that is possible to input a sufficient number of user instructions.