Mouse Button Buffer Structure for Stable Switch Triggering
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Solution Overview
Problem
Traditional mice suffer from instability due to gaps between the button and internal switch, leading to idle travel, wobbling, noise, and inadvertent triggering, which affect tactile feedback and responsiveness.
Innovation Solution
A mouse design incorporating a special-shaped buffer with a rib column and preloaded elastomer that ensures stable pressure on the switch, enhancing tactile feedback and ensuring precise triggering by connecting the button to the switch through the buffer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional mouse uses direct connection between button and switch, then the structure is simple, but gaps cause instability, idle travel, and poor tactile feedback
Solution Approach 1:
The patent introduces a buffer structure as an intermediary component between the button and switch. This buffer includes a buffer body with a buffer cavity, a preloaded elastomer positioned in the cavity, and a rib column that transmits force. The intermediary buffer eliminates gaps and ensures stable switch triggering while maintaining reasonable structural complexity through modular design.
Solution Approach 2:
The patent employs a preloaded elastomer within the buffer cavity that undergoes elastic deformation parameter changes. The elastomer is pre-compressed between the buffer body and base, creating a controlled spring force that ensures consistent pressure transmission to the switch. This parameter change approach provides reliable tactile feedback and eliminates idle travel without requiring complex mechanical linkages.
2Manufacturing precision
If tolerances between button and switch are reduced to eliminate gaps, then tactile feedback improves, but manufacturing precision requirements increase
Solution Approach 1:
The buffer structure serves as a tolerance-absorbing intermediary that decouples the precision requirements between button and switch. The buffer body, rib column, and elastomer combination provides a self-adjusting mechanism that accommodates manufacturing variations while ensuring consistent force transmission. This approach significantly reduces manufacturing precision requirements compared to direct button-switch connection.
Solution Approach 2:
The preloaded elastomer provides a compliant element that compensates for dimensional variations through elastic deformation. The elastomer's spring constant and preload force can be tuned to accommodate a range of tolerances, making the assembly process more forgiving and easier to manufacture at scale without sacrificing performance.
3Ease of operation
If a buffer structure is added to eliminate gaps and improve tactile feedback, then switch triggering reliability improves, but device complexity increases
Solution Approach 1:
The buffer structure is segmented into distinct functional components: a buffer body with cavity, a preloaded elastomer, and a rib column. This segmentation allows each component to be optimized independently for its specific function while assembling into a compact unit. The modular design improves tactile feedback through specialized geometry without proportionally increasing overall device complexity.
Solution Approach 2:
The buffer structure performs multiple functions simultaneously: it eliminates gaps between button and switch, provides tactile feedback through elastomer compression, ensures reliable switch triggering through the rib column, and absorbs manufacturing tolerances. This multi-functionality achieves improved ease of operation without a proportional increase in complexity, as a single buffer assembly delivers multiple benefits.
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 special-shaped buffer provides enhanced tactile feedback and reliable switch triggering, ensuring a stable and accurate pressing action.
Implementation Method 1
a special-shaped preloaded elastomer disposed in the rib column and having a top end abutted against a cantilever portion of the main body and a bottom end abutted against the bottom end of the rib column
Data Source
AI summary
A mouse includes a main body, a button, a switch, and a special-shaped buffer. The main body has an accommodation space and a top opening communicating with the accommodation space. The button is mounted to the main body and fitted to the top opening. The switch is mounted in the accommodation space of the main body and has a trigger portion. The special-shaped buffer is disposed in the accommodation space of the main body and has a top end connected to the button through the top opening of the main body and a bottom end corresponding to the trigger portion of the switch. As such, when the button is pressed, the button drives the special-shaped buffer to press the trigger portion of the switch, so that the switch is triggered reliably.


