Footrest Pedestal Drive Linkage for Obstruction Retraction
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Solution Overview
Problem
Conventional driving devices for footrest pedestals often result in idle motor operation and potential user injury due to obstruction, as the driving shaft cannot retract when an obstacle is present, leading to malfunction and unsafe conditions.
Innovation Solution
The driving device incorporates a movable connector, an extension rod, and an immovable connector with a limiting bar, allowing the driving shaft to be lifted and retracted even when obstructed, preventing idle motor running and inadvertent clamping by adjusting the distance between the driver body and the driving shaft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the driving shaft is fixed to the driver body, then the structure is simple, but the motor runs idle when obstruction occurs
Solution Approach 1:
The patent applies the dynamics principle by making the driving shaft movable relative to the driver body through a guide groove and movable connection structure. When obstruction occurs, the driving shaft can move along the guide groove to absorb the obstruction force, preventing the motor from running idle. This dynamic adjustment resolves the contradiction by maintaining structural simplicity while improving motor operation reliability.
2Stability of the object's composition
If the driving shaft cannot move when obstructed, then the structure is stable, but user injury may occur due to inadvertent clamping
Solution Approach 1:
The patent uses the dynamics principle to allow the driving shaft to move along the guide groove when obstruction occurs. This movement enables the system to adapt to external forces (such as user limbs) without maintaining rigid clamping, thereby reducing the risk of user injury while preserving overall structural stability through the guide groove constraints.
3Device complexity
If the distance between driver body and driving shaft is fixed, then the mechanism is simple, but the footrest cannot operate smoothly when obstacle exists
Solution Approach 1:
The patent implements the dynamics principle by creating a movable connection between the driving shaft and driver body through the guide groove. This allows the distance between them to adjust dynamically when obstacles are present, enabling smooth footrest operation while maintaining mechanism simplicity through the straightforward guide groove design.
Solution Approach 2:
The guide groove acts as an intermediary element between the driving shaft and driver body, mediating the relative movement when obstacles occur. This intermediary structure enables smooth operation by allowing controlled displacement while maintaining the overall mechanical connection, resolving the contradiction between simplicity and operational smoothness.
Data Source
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AI summary
A driving device for a footrest pedestal is mounted between a frame (3) and a footrest (2) on the frame (3) and has a driver body (11) with two ends respectively equipped with a retractable driving shaft (111) and the pivotal block (112), a motor (113) mounted beside the driver body (11), and an auxiliary pivotal base mounted on the frame (3) to combine with the pivotal block (112). The auxiliary pivotal base has a movable connector (12) engaged with the pivotal block (112), an immovable connector (14) mounted on the frame (3) and an extension rod (13) pivotally connected between the movable and immovable connectors (12, 14) so that the extension rod (13) is liftable to adjust the distance of a lower end of the driver body (11) and an end of the driving shaft (111) to keep the driving shaft (111) retracting thus to avoid motor idle running.