Seat Drive Device Clutch Mechanism Prevents Motor Overload
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Solution Overview
Problem
Existing seat drive devices with a single motor struggle to efficiently operate multiple position adjustment mechanisms simultaneously, leading to motor overload and reduced operation speed.
Innovation Solution
A seat drive device with a single motor, featuring a clutch mechanism and transmission members with notches and operation restricting portions that prevent simultaneous operation of multiple position adjustment mechanisms by interfering with each other's rotation, ensuring each mechanism is actuated independently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple position adjustment mechanisms are simultaneously operated, then the seat can be adjusted more efficiently, but the motor becomes overloaded and operation speed is lowered
Solution Approach 1:
The patent applies preliminary anti-action by providing operation restricting portions that prevent simultaneous operation of multiple position adjustment mechanisms. The restricting portions are designed to interfere with each other when multiple mechanisms are attempted to be operated at the same time, thereby preventing motor overload before it occurs. This allows the system to maintain efficient operation by ensuring only one mechanism is actuated at a time, keeping the motor within its power capacity.
2Device complexity
If a single motor is used to actuate multiple position adjustment mechanisms, then device complexity is reduced, but the motor cannot efficiently handle simultaneous operation of multiple mechanisms
Solution Approach 1:
The patent applies self-service by designing the transmission members with operation restricting portions that automatically prevent simultaneous operation of multiple mechanisms. The system self-regulates by providing mechanical interference between the restricting portions, which physically block the operation of one mechanism when another is being operated. This eliminates the need for complex electronic control systems or additional motors, as the mechanical structure itself enforces the operational constraint.
3Power
If operation restricting portions are provided to prevent simultaneous operation, then motor overload is prevented, but transmission member complexity increases
Solution Approach 1:
The patent applies merging by integrating the operation restricting portions directly into the transmission members themselves. Rather than adding separate restriction mechanisms, the restricting portions are formed as part of the transmission member structure. This is achieved by providing protrusions or interference features on the transmission members that naturally conflict with each other when multiple mechanisms are operated simultaneously, thereby combining the transmission function and the restriction function into a single integrated component.
Data Source
AI summary
A seat drive device, wherein one of first and second operation restricting portions corresponding to one of first and second transmission members is movable within one of first and second notches corresponding to another of the first and second transmission members when the one of the first and second transmission members is rotated from an initial state where both of the first and second transmission members are not rotated, and the first and second operation restricting portions are arranged to interfere with each other when both of the first and second transmission members are simultaneously rotated.