Multidirectional Switch Coaxial Restorative Force
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Solution Overview
Problem
The existing multidirectional switch experiences a reduction in restorative force when the operating rod is tiltably operated due to the return spring's urging force acting along the tilt plane, leading to a less convenient operation.
Innovation Solution
Incorporating an urging member that applies a coaxial force to the operating rod, along with a pressure-receiving member that has a tilt limit, ensuring the urging force acts directly on the operating rod and maintaining a restorative force, and using protruding pieces to set the tilt limit without increasing components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a compressed coil-type return spring is used to apply urging force to the operating rod, then the operating rod can be restored to neutral orientation, but the urging force acts in a direction away from the axial center when the rod is tilted, reducing the restorative force
Solution Approach 1:
A coaxial urging member is introduced as an intermediary between the return spring and the operating rod. This urging member receives the urging force from the return spring and transmits it coaxially to the operating rod, ensuring the force always acts through the axial center regardless of the rod's tilt angle, thereby maintaining optimal restorative force
Solution Approach 2:
The force transmission function is segmented into two distinct components: the return spring generates the urging force, while the coaxial urging member transmits this force coaxially to the operating rod. This segmentation allows each component to perform its specialized function optimally, with the urging member specifically designed to maintain coaxial force transmission
2Adaptability or versatility
If the spring seat member tilts toward the axial center during tilting operation, then the urging force acts along the tilt plane, but this causes the return spring to displace between the bottom surface and spring seat member, changing the urging force direction
Solution Approach 1:
The coaxial urging member serves as a mediator that decouples the spring seat member's tilting motion from the force transmission to the operating rod. Even when the spring seat member tilts during operation, the urging member maintains coaxial alignment and transmits force stably in the axial direction, preventing displacement of the return spring
Solution Approach 2:
The spring seat member is designed to be dynamically adaptable, allowing it to tilt during operation to accommodate the full range of tilting movements. Simultaneously, the coaxial urging member maintains static coaxial alignment for stable force transmission, creating a dynamic system that adapts to operational requirements while maintaining force stability
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
This configuration maintains a suitable urging force on the operating rod during tilting operations, enhancing the switch's convenience and effectiveness by preventing displacement of the pressure-receiving member and ensuring the urging force acts orthogonally, thus restoring the rod to its neutral orientation efficiently.
Implementation Method 1
a compressed coil-type return spring is provided between the spring seat member and the bottom wall of the case
Implementation Method 2
the urging force that acts on the operating rod from the return spring causes a radial location of the return spring to be compressed and an oppositely disposed location to be extended
Data Source
AI summary
A pressure-receiving member that can be moved along an urging axial center, and a compression coil spring for urging the pressure-receiving member in the direction of an engaging body, are provided between the engaging body in an inside end position of an operating rod and a bottom wall part of a casing. A plurality of protruding pieces for restricting tilting by making contact with the pressure-receiving member is provided to the internal surface of a cylindrical part of a rotor that engages and integrally rotates with engaging pieces of the external periphery of the engaging body.