Switch Device Locking Structure Leverage Mechanism
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Solution Overview
Problem
Conventional switch devices face issues with easy sticking and laborious operation due to stress concentration at the junction between the lever and rotary body, leading to poor locking effects and structural integrity concerns, while existing solutions require excessive strength for unlocking and compromise on enclosure.
Innovation Solution
A locking structure featuring a connection seat with a movable shift body and lever member, where the ridge section elastically passes over a restriction section using a fulcrum for leverage, allowing for easy locking and unlocking with minimal strength and maintaining a completely enclosed design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the material or structure of the lever is reinforced to prevent loosening or detachment, then the locking reliability is improved, but it becomes more laborious to operate the lever and the elastic deformability deteriorates
Solution Approach 1:
The patent introduces a rotary body as an intermediary component between the lever and the support body. The lever engages with the rotary body, which in turn engages with the pushbutton. This intermediary structure allows the lever to be softer and more easily operable while the rotary body transmits the locking force reliably to the support body, resolving the contradiction between lever softness for easy operation and structural strength for reliable locking.
2Ease of operation
If the lever is made softer to increase free elasticity for easier operation, then the ease of operation is improved, but the locking effect becomes poor due to mis-touch by external force
Solution Approach 1:
The patent segments the locking mechanism into distinct functional components: the lever for operation, the rotary body for force transmission and positioning, and the engagement sections for locking. This segmentation allows the lever to be soft and easily operable while the rotary body and engagement sections provide the necessary structural strength and reliable locking effect, preventing mis-touch issues.
3Ease of operation
If up and down shifting operation is applied to the lever to engage or disengage the engagement section, then the locking mechanism can be operated, but stress concentrates on the junction between the lever and rotary body affecting structural integrity
Solution Approach 1:
Instead of the conventional up-and-down shifting motion that creates stress concentration, the patent inverts the motion direction to a rotational movement of the rotary body. The lever moves horizontally to engage or disengage the engagement section, while the rotary body rotates to transmit the locking force. This inverted motion pattern eliminates stress concentration at the lever junction while maintaining full locking operation capability.
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
Enables operation with less strength and enhances the locking mechanism's reliability by reducing the need for simultaneous component deformation during unlocking, while maintaining structural integrity and enclosure.
Implementation Method 1
the ridge section is permitted to directly elastically pass over the restriction section to be restricted by the restriction section into a locked state
Implementation Method 2
an operator simply needs to push the push/press section of the lever member to drive the ridge section by way of leverage to backward pass over the restriction section
Data Source
AI summary
A locking structure of switch device includes a connection seat formed with a main body assembling hole. An arm protrudes from the connection seat. A restriction section is formed on the arm. A shift body is assembled on the connection seat and movable between a first position and a second position. The shift body has a shift section aligned with the arm in the second position. A lever member is disposed on the shift section. Two ends of the lever member are respectively formed with a ridge section and a push/press section. When the shift body moves from the first position to the second position, the ridge section passes over the restriction section into a locked state. When pressing the push/press section, the ridge section is driven by way of leverage to backward pass over the restriction section into an unlocked state.