Trackball Ejection Mechanism for Easy Ball Removal
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Solution Overview
Problem
Existing trackball devices lack an efficient mechanism for removing and replacing the ball, making maintenance and cleaning cumbersome, and do not provide a convenient way to change the ball's color or remove dust adhered to it.
Innovation Solution
A trackball input device with an integrated ejection mechanism, comprising a plunger and actuator, allows for easy removal and reinsertion of the ball by moving between retracted and extended positions, enabling cleaning and ball replacement without external tools, and optionally includes a mechanism for changing the ball's color.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional trackball design is used, then the ball is securely held in place, but the ball cannot be easily removed for cleaning or replacement
Solution Approach 1:
The patent extracts the ball from the sealed housing by introducing a ball ejection mechanism that includes a push-up member and a lever. The lever pivots to push the ball upward out of the housing, allowing easy removal for cleaning or replacement while maintaining secure holding during normal operation.
Solution Approach 2:
The patent employs dynamic movement of the lever component that pivots between a retracted position (when the ball is held securely) and an extended position (when the ball is pushed out for removal). This dynamic mechanism allows the same structure to provide both secure retention and easy removal functionality.
2Reliability
If a sealed housing is used to protect internal components, then reliability is improved, but maintenance and cleaning become cumbersome
Solution Approach 1:
The patent maintains the sealed housing protection while extracting the ball for maintenance through a dedicated ejection pathway. The lever mechanism pushes the ball through a controlled opening, allowing the ball to be removed for cleaning or replacement without compromising the protective seal of the housing for other components.
Solution Approach 2:
The patent segments the housing into a sealed protective enclosure for internal components and a separate accessible pathway for ball removal. This segmentation allows the housing to remain sealed and protective while providing a dedicated access route for maintaining the ball, thus resolving the contradiction between protection and maintenance accessibility.
3Adaptability or versatility
If the ball is permanently fixed in the trackball, then structural stability is maintained, but customization and color changes are not possible
Solution Approach 1:
The patent employs a dynamic retention mechanism where the lever can be positioned to securely hold the ball during operation, providing stability. When customization is needed, the same lever mechanism can be actuated to release and remove the ball, allowing color changes or replacements while maintaining operational stability.
Solution Approach 2:
The patent allows the ball to be extracted from its permanent-looking fixed position through the ejection mechanism. This enables users to remove the ball for customization or replacement while the same mechanism ensures the ball remains securely held during normal use, thus achieving both adaptability and stability.
Data Source
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AI summary
A computer input device including a housing including a first side and a second side that is spaced apart from the first side, and a ball partially positioned within and rotatable relative to the housing. At least a portion of the ball extends through an aperture in the first side. The computer input device also includes a user-operable actuator accessible from the second side of the housing and configured to eject the ball from the housing.