Extension table
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Solution Overview
Problem
Existing extension tables face a risk of collision during the rotation of the extension top when extending to maximum length, necessitating safety devices to prevent rotation until maximum extension is achieved, which can be cumbersome and unreliable.
Innovation Solution
An anti-collision safety device that allows free rotation of the extension top only when the mobile frame has reached the maximum extraction travel, featuring a revolving disk and a preloaded spring mechanism to ensure the extension top can rotate freely at maximum length while preventing rotation at shorter lengths, thus avoiding collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If safety devices are added to prevent extension top rotation until maximum extension is achieved, then collision risk is reduced, but device complexity increases
Solution Approach 1:
The system uses the table frame's own movement to control the extension top's rotation capability. The extension top is automatically enabled to rotate only when the frame reaches its fully extended position, eliminating the need for external safety devices or complex control systems.
Solution Approach 2:
Instead of using complex safety mechanisms to prevent rotation at wrong positions, the invention inverts the approach by designing the extension top to be freely rotatable only at the correct position (fully extended), simplifying the overall system while maintaining safety.
2Reliability
If complex safety mechanisms are used to prevent rotation at incorrect positions, then collision prevention is improved, but ease of operation deteriorates
Solution Approach 1:
The extension top automatically senses the frame's position through its mechanical connection and enables rotation only when properly extended, eliminating the need for users to operate complex safety mechanisms or follow complicated procedures.
3Reliability
If traditional safety devices are implemented to control extension top rotation, then collision risk is reduced, but manufacturing cost increases
Solution Approach 1:
The invention extracts and eliminates unnecessary safety devices from the system, retaining only the essential functional elements. The extension top's rotation control is achieved through its inherent mechanical design rather than additional safety components, reducing manufacturing complexity and cost.
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
The solution provides a reliable and easy-to-manufacture anti-collision mechanism that ensures safe and efficient extension and rotation of the extension top, preventing collisions and simplifying the extension process by allowing rotation only at maximum length, thereby enhancing user safety and convenience.
Implementation Method 1
featuring a revolving disk and a preloaded spring mechanism to ensure the extension top can rotate freely at maximum length while preventing rotation at shorter lengths
Data Source
Figure 1
Figure 1A~1E.
Figure 1D
AI summary
Extension table (100) comprising a fixed frame (10) and a mobile frame (20), and a safety device that comprises mechanisms that prevent the extension top (40) from rotating if the table is not previously extended to the maximum extension length; the safety device comprising a revolving disk (50) fixed under the extension top (40) and having a shaped slot (54) where a vertical pin is slidingly coupled, said vertical pin (55) protruding from a longitudinal rod (60) supported by the mobile frame (20).