Exhibition Device for Reversal Spanners with Bi-Directional Testing
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Solution Overview
Problem
Existing exhibition devices for ratchet spanners fail to allow bi-directional rotation and testing, as the seat rotates with the ratchet spanner during restoration due to design defects, limiting testing to a single direction and preventing assessment of smoothness during idle rotation.
Innovation Solution
An exhibition device featuring a suspending plate with a buckling hole and notch, a seat with a connecting unit and ratchet portion, and limiting teeth that prevent reverse rotation, enabling bi-directional rotation and audible feedback during operation for smoothness evaluation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the seat is designed to rotate with the ratchet spanner during restoration, then the spanner can be displayed in a fixed position, but the spanner cannot rotate bi-directionally and cannot be tested for smoothness during idle rotation
Solution Approach 1:
The device is segmented into independent functional components: the suspending plate for fixed mounting, the seat for controlled rotation, the connecting unit for controlled coupling, and the limiting teeth for directional control. This segmentation allows the seat to be decoupled during testing and recoupled for display, resolving the contradiction between testing capability and display stability.
Solution Approach 2:
The connecting unit provides dynamic coupling between the seat and suspending plate, allowing the system to transition between fixed (for display) and movable (for testing) states. The limiting teeth dynamically control the rotation direction, enabling bi-directional rotation during testing while maintaining controlled rotation during display.
2Loss of information
If the seat rotates with the ratchet spanner, then the spanner position is stable for display, but the user cannot assess smoothness through audible feedback during idle rotation
Solution Approach 1:
The limiting teeth provide audible feedback through clicking sounds during idle rotation, allowing users to assess the smoothness of the spanner's operation. This feedback mechanism is activated when the connecting unit allows idle rotation, resolving the contradiction between stability and feedback by providing feedback only when needed for assessment.
Solution Approach 2:
The system dynamically adjusts its stability characteristics: during testing, the connecting unit allows controlled idle rotation for feedback, while during display, the limiting teeth constrain rotation to maintain stability. This dynamic behavior resolves the contradiction between stability and information feedback.
3Adaptability or versatility
If the ratchet portion is aligned with the notch, then the seat can rotate freely in both directions, but the spanner cannot be properly constrained for stable display
Solution Approach 1:
The limiting teeth are asymmetrically positioned relative to the notch, creating different engagement characteristics for different rotation directions. This asymmetry allows free rotation in the testing direction while providing controlled constraint in the display direction, resolving the contradiction between adaptability and reliability.
Solution Approach 2:
The rotation control is segmented into different modes: free rotation enabled during testing when the ratchet portion passes through the notch, and constrained rotation during display when the limiting teeth engage. This segmentation allows the system to achieve both versatile rotation and stable display.
Data Source
AI summary
An exhibition device for reversal spanners includes a suspending plate having a buckling hole; a periphery of the buckling hole being formed with a notch so as to form as a confining unit; an inner side of the confining unit having a plurality of limiting teeth; and a seat; a connecting unit extending from the seat; the connecting unit being rotatably buckled to the buckling hole; a ratchet portion being formed on a surface of the connecting unit; the ratchet portion being not aligned to the notch; and the ratchet portion being engageable to the limiting teeth.