Side Key Gasket Structure for Long Stroke in Thin Electronics
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Solution Overview
Problem
The reduction in size and thickness of electronic apparatuses, such as smartphones, necessitates ensuring favorable operability of press operation keys arranged in limited spaces, particularly on side surfaces.
Innovation Solution
An electronic apparatus design featuring a casing with a long, narrow opening, an operation key with flange portions, a support with a switch element, and a gasket member with a movable portion, fixed portions, and an elastic deformation layer to ensure a sufficient stroke for press operations without obstruction, while preventing key tilt and fall.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the electronic apparatus is reduced in size and thickness, then the device becomes more compact and portable, but the operability of press operation keys arranged in limited spaces deteriorates
Solution Approach 1:
The gasket member utilizes the thickness dimension (third axis direction) to provide sufficient key stroke distance. By arranging the movable portion and deformation layer vertically between the key body and switch element, the invention creates adequate operational space in the depth direction while maintaining a compact footprint in the planar dimensions.
Solution Approach 2:
The gasket member is nested within the limited space between the key body, support, and casing. The movable portion fits within the opening portion, and the deformation layer is positioned within the gap between structural components, effectively utilizing available volume to achieve both compactness and operational functionality.
2Ease of manufacture
If the key structure is simplified to reduce manufacturing complexity, then production becomes easier, but the ability to ensure sufficient stroke distance in limited spaces deteriorates
Solution Approach 1:
The deformation layer functions as a flexible elastic film that provides the necessary stroke distance through its compressible nature. This thin film structure achieves the required key travel distance without adding significant volume or manufacturing complexity, as it can be integrated into the existing layered structure between components.
Solution Approach 2:
The gasket member is segmented into distinct functional portions: the movable portion that contacts the key body and switch element, and the deformation layer that provides elastic compliance. This segmentation allows each portion to be optimized for its specific function while maintaining overall manufacturing simplicity through integration as a single component.
3Stability of the object's composition
If the gasket member structure is made more complex to prevent key tilt, then key stability improves, but the manufacturing complexity increases
Solution Approach 1:
The pair of fixed portions is positioned asymmetrically at both ends of the key body in the long direction, with recess portions that receive the flange portions. This asymmetric arrangement creates natural mechanical constraints that prevent key tilt around the first axis without requiring additional active restriction mechanisms, maintaining manufacturing simplicity while achieving stability.
Solution Approach 2:
The deformation layer acts as an intermediary elastic element between the movable portion and the pair of fixed portions. This intermediary structure provides both support and tilt restriction through its elastic properties, preventing key instability without requiring complex mechanical constraint 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
Ensures favorable operability and stability of press operation keys by allowing a long stroke and preventing key tilt and fall, even in limited spaces, thereby enhancing user interaction.
Implementation Method 1
The deformation layer supports the movable portion and the pair of fixed portions and is formed of an elastic material
Data Source
AI summary
An electronic apparatus (200) includes a casing (201), an operation key (10), a support (20), and a gasket member (30). The casing (201) has an opening portion (230h) long in a first axis (X-axis) direction and short in a second axis (Z-axis) direction. The operation key (10) includes a key body (11) that is fitted in the opening portion (230h) and a pair of flange portions (12) respectively provided at both ends of the key body (11) in a long direction. The support (20) is arranged inside the casing (201) and includes a switch element for detecting a press operation on the operation key (10). The gasket member (30) includes a movable portion (31), a pair of fixed portions (32), and a deformation layer (33). The pair of fixed portions (32) is arranged between the casing (201) and the support (20) and respectively includes recess portions (32a) that the pair of flange portions (12) enters at a time of the press operation on the operation key (10).