Car Seat Lumbar Support With Motorized Spring Force Control

The patent removes the wire from the force transmission path between the actuator and support plates. Instead of using a wire that is prone to snapping, the invention directly couples the actuator to the support plates through a mechanical linkage system consisting of a connecting rod and pivot points, thereby extracting the unreliable wire component while maintaining automatic control functionality

The patent introduces a connecting rod as an intermediary mechanical element between the actuator and the support plates. This connecting rod serves as a mediator that transmits the actuator's motion to the support plates through rigid mechanical connection rather than through a flexible wire, resolving the reliability issue while preserving the automatic control capability

The patent replaces the manual rotary lever mechanical system with an automated actuator system. The actuator, which can be electrically or electronically controlled, substitutes for the manual mechanical operation, thereby reducing the operational effort required from the user while introducing a more complex but automated control mechanism

The patent implements a self-service control system where the actuator automatically adjusts the bending degree of the support plates based on predefined parameters or user preferences stored in memory. The system serves itself by automatically positioning the support plates without requiring continuous manual intervention, thereby improving ease of operation while maintaining manageable device complexity through programmatic control