Portable Game Button Layout With Rotating Shaft Support
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Solution Overview
Problem
Conventional portable game devices often face challenges in optimizing the layout and functionality of operation buttons on their housings, particularly in terms of space efficiency and user ergonomics, especially when additional buttons are provided on the upper surface alongside the main display surface.
Innovation Solution
The portable game device incorporates operation buttons with specific arrangements and rotational shaft mechanisms, where each button has an inclined part and a shaft positioned to allow for rotation and prevent downward movement, optimizing space usage and ergonomics by arranging buttons in symmetrical and ergonomic positions on the upper surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If operation buttons are arranged on the upper surface of the housing in addition to the main surface, then the functionality and operability of the device is improved, but the device complexity and space requirements increase
Solution Approach 1:
The button structure is segmented into multiple functional parts: an exposed part for user input, an inclined part for mechanical leverage, and a shaft portion for rotation. This segmentation allows each part to perform its specific function efficiently, enabling enhanced functionality without proportionally increasing overall complexity
Solution Approach 2:
The button utilizes three-dimensional spatial arrangement by extending from the upper surface into the housing interior. The shaft is positioned at a specific depth and orientation, creating a rotational axis that enables multi-directional operation. This dimensional approach allows complex functionality within limited space
2Ease of operation
If buttons are made rotatable with shaft mechanisms to improve operability, then ease of operation is enhanced, but the manufacturing precision requirements and device complexity increase
Solution Approach 1:
The button structure employs asymmetric design where the shaft is positioned offset from the center of the exposed part, and the inclined part is configured with specific angular relationships. This asymmetric arrangement creates natural mechanical guidance that simplifies manufacturing while ensuring reliable rotational operation
Solution Approach 2:
The inclined part of the button structure serves a dual function: it provides mechanical leverage for user operation and simultaneously acts as a guide that automatically positions and constrains the shaft during assembly and operation. This self-positioning mechanism reduces the need for high-precision manufacturing tolerances
3Reliability
If the shaft is positioned to prevent downward movement of the button while allowing rotation, then reliability is improved, but the manufacturing complexity and assembly difficulty increase
Solution Approach 1:
The shaft is positioned at a specific depth within the housing where it experiences balanced mechanical constraints: the inclined part provides upward support force that counteracts downward pressure, while allowing rotational movement. This equipotential positioning creates a stable equilibrium that maintains reliability without requiring complex restraint mechanisms
Solution Approach 2:
The shaft acts as an intermediary element between the button's exposed part and the housing structure. It transmits rotational motion while being constrained by the housing, and simultaneously supports the button's weight and operational forces. This intermediary role simplifies the overall design by decoupling the rotational function from the structural support function
Data Source
AI summary
The portable game device includes a display, a first button, a second button, and a housing having a main surface, a back surface and a side surface. The side surface has an upper surface on which the first button and the second button are arranged. The first button has a first exposed part exposed from the housing and a first shaft serving as a rotation center of the first button. The first exposed part has, on the right side of the first exposed part, a first inclined part inclined from the right side toward the left side in a direction away the upper surface. The first shaft is arranged in the same position as the first exposed part in a left-right direction, and is accommodated in the housing so as to be rotatable in a direction in which a left end part of the first exposed part sinks when the first exposed part is pressed downward and so as to prevent an entirety of the first exposed part from moving downward. The second button is configured in the same way as the first button.