Gaming Machine Handle Ratchet Assembly for Reverse Overload Slip
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Solution Overview
Problem
Current gaming machine handle assemblies are prone to damage and malfunction when forcibly reversed, leading to inoperability and increased maintenance costs.
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 preserving functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the handle assembly uses a simple pull-actuation mechanism with home and spin detection positions, then the device complexity is reduced and ease of operation is improved, but the reliability deteriorates because forcible reversal can damage components and render the assembly inoperable
Solution Approach 1:
The patent applies beforehand cushioning by incorporating a reverse drive protection assembly with springs and a dashpot that activate before damage occurs. The springs compress and the dashpot dissipates energy during reverse movement, cushioning the impact before it reaches the internal components. This protective mechanism engages proactively during reverse loading conditions, preventing damage to the actuator and other sensitive parts before they can be compromised.
2Reliability
If the handle assembly prevents forcible reversal to protect components, then the reliability is improved, but the ease of operation deteriorates because the handle becomes locked and cannot return to home position
Solution Approach 1:
The patent applies dynamics by creating a dynamic protection system that adapts its behavior based on the direction and magnitude of applied force. During normal operation, the handle moves freely between positions. During reverse loading, the protection assembly activates dynamically with springs compressing and the dashpot engaging to provide controlled resistance. This dynamic response allows the system to protect components while still permitting controlled return to the home position through the action of the return spring and pawl-ratchet mechanism.
3Ease of operation
If the handle assembly allows free movement between positions, then the ease of operation is improved, but the reliability deteriorates because excessive force in reverse direction can damage internal components
Solution Approach 1:
The patent applies the intermediary principle by introducing a reverse drive protection assembly that acts as a mediator between the handle and the internal actuator components. This intermediate mechanism includes springs, a dashpot, and a pawl-ratchet system that absorb and manage reverse loading forces. The intermediary assembly protects the sensitive actuator from direct exposure to harmful reverse forces while still allowing the handle to move freely during normal operation, thus decoupling the ease of operation from the vulnerability to damage.
4Reliability
If the handle assembly uses a locking mechanism to prevent reverse damage, then the reliability is improved, but the device complexity increases due to additional components
Solution Approach 1:
The patent applies parameter changes by utilizing the physical properties of springs and dashpots that change their mechanical characteristics based on applied force parameters. The springs compress and increase in stiffness as force is applied, while the dashpot provides velocity-dependent damping. These parameter changes allow the protection mechanism to engage selectively under reverse loading conditions without requiring complex control systems or multiple switching mechanisms, thus providing reliable protection with relatively simple components.
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 assembly effectively protects the gaming machine and handle from damage during reverse loading, maintaining operational integrity and reducing maintenance costs.
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
Implementation Method 2
the hub comprising a torsion spring, a return spring, and a reaction pin
Implementation Method 3
ratchet plate on the face plate, the ratchet plate comprising a plurality of angled teeth
Implementation Method 4
allows a normally locking ratchet and pawl to slip past each other in a reverse loading condition
Implementation Method 5
A back-driving handle assembly with tuned counter-opposing springs and a ratchet plate with angled teeth
Implementation Method 6
tuned counter-opposing springs arranged with a ratchet plate
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.