Gaming Machine Handle Assembly for Reverse-Load Slip Protection
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Solution Overview
Problem
Current gaming machine handle assemblies are prone to damage and malfunction when forcibly reversed, leading to increased maintenance costs and operational disruptions.
Innovation Solution
A back-driving handle assembly with tuned counter-opposing springs and a ratchet plate with angled teeth allows the ratchet and pawl to slip past each other in reverse loading conditions, preventing damage and maintaining functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional handle assembly is used to prevent forcible reversal, then the handle assembly can maintain simple pull-actuation functionality, but the handle assembly and gaming machine components may be damaged when reverse loading occurs
Solution Approach 1:
The patent converts the harmful reverse loading force into a beneficial protective mechanism. When reverse loading exceeds the return bias, the ratchet and pawl are designed to slip past each other, allowing the handle to return to home position while dissipating the excessive force. This transforms the potentially damaging reverse force into a controlled slipping action that protects internal components.
Solution Approach 2:
The patent implements beforehand cushioning through the tuned counter-opposing springs (return spring and torsion spring) that are pre-configured to balance each other. These springs create a controlled return bias that cushions against reverse loading forces before they can cause damage, allowing the system to absorb and manage excessive forces in a predetermined safe manner.
2Ease of operation
If the ratchet and pawl are designed to lock firmly to prevent reverse movement, then the handle assembly maintains operational control, but the assembly becomes inoperable when excessive reverse force is applied
Solution Approach 1:
The patent applies dynamics by making the ratchet-pawl interaction conditional rather than static. The system dynamically adapts its behavior: under normal operation the ratchet and pawl lock firmly to maintain control, but under excessive reverse force they slip past each other. This dynamic transition from locked to slipped state allows the system to maintain ease of operation while avoiding complete failure that would require replacement.
3Reliability
If the handle assembly is designed with strong locking mechanisms to prevent reverse driving, then operational integrity is maintained, but maintenance costs increase due to complete replacement when malfunction occurs
Solution Approach 1:
The patent converts the potentially harmful excessive reverse force into a beneficial slipping action between the ratchet and pawl. This controlled slipping protects the handle assembly from damage while maintaining operational integrity, thereby reducing maintenance costs by avoiding complete replacement. The harmful force is transformed into a protective mechanism that extends component life.
4Stability of the object's composition
If the handle assembly uses fixed spring tension to prevent reverse movement, then the assembly maintains structural stability, but it becomes vulnerable to damage when reverse force exceeds spring resistance
Solution Approach 1:
The patent applies parameter changes by using tuned counter-opposing springs where the return spring and torsion spring are specifically calibrated to balance each other. This creates a dynamic return bias that can adapt to varying reverse loading conditions. The spring parameters are optimized to provide sufficient resistance under normal operation while allowing controlled slipping when excessive force is applied, thereby maintaining both structural stability and strength.
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 effectively protects the handle assembly and gaming machine from damage due to reverse loading, reducing maintenance costs and ensuring continuous operation.
Implementation Method 1
The reaction pin is biased with the torsion spring to slide over the first side of at least one of the plurality of angled teeth responsive to the external torque moving in the first direction, and to slip past the second side of at least one of the plurality of angled teeth responsive to the external torque exceeding the return bias in the second direction
Implementation Method 2
The reaction pin engages the torsion spring that is attached to the at least one reaction hole
Data Source
AI summary
A back-driving handle assembly for protecting a gaming machine from damage when the back-driving handle assembly is loaded in reverse. The back-driving handle assembly includes tuned counter-opposing springs and a ratchet plate with a specially designed tooth angle. The back-driving handle assembly allows normally locking ratchet and pawl to slip past some teeth on an overload condition, thus preserving functionalities of the back-driving handle assembly.