Parallel-Lift Table Hinge with Stabilizing Lever and Magnetic Lock
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Solution Overview
Problem
Existing pivot fittings for parallel lifting of table tops and shelves lack stability in the lower parallelogram position and have inadequate locking mechanisms, particularly when adapting to varying table top weights.
Innovation Solution
The introduction of a stabilizing lever arm and a spring device, along with a locking mechanism utilizing a permanent magnet, to enhance stability and facilitate easy operation by automatically locking and unlocking the fitting based on the table top's weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a stabilizing lever arm is added to stabilize the lower parallelogram position, then stability in the lower position is improved, but device complexity increases
Solution Approach 1:
The stabilizing function is segmented into a separate lever arm component (21) that is articulated independently on the mounting flanges, rather than integrating stabilization into the existing parallelogram linkage structure. This modular approach adds the necessary stability while keeping the added complexity isolated to a single functional component.
Solution Approach 2:
The stabilizing lever arm is designed to be dynamically active only when needed - it provides stabilization in the lower parallelogram position through its articulated connection, but becomes passive or disengaged in the upper position, allowing the system to adapt its structural characteristics based on operational state.
2Ease of operation
If a locking lever with permanent magnet is used to automatically lock and unlock, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The locking lever (17) is designed to automatically lock and unlock the fitting based on the table top's weight and position. The permanent magnet provides automatic holding force in the upper position without requiring manual intervention, and the projection on the mounting flange automatically releases the magnet when the table top is lowered, enabling self-service operation.
Solution Approach 2:
The manual locking mechanism is replaced with a magnetic field-based system. Instead of requiring manual manipulation of mechanical locks, the permanent magnet creates an automatic locking effect that engages and disengages based on the table top's position and weight, substituting magnetic force for manual mechanical operation.
3Ease of operation
If a spring device is added to support raising the parallelogram links, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The spring device (20) acts as a counterweight mechanism that supports the weight of the table top and assists in raising the parallelogram links into the upper position. The spring provides upward force that counteracts gravity, making the lifting operation easier while the spring's elastic properties allow it to adapt to different table top weights.
4Adaptability or versatility
If the locking mechanism is made adaptive to table top weight, then adaptability is improved, but device complexity increases
Solution Approach 1:
The locking mechanism's behavior is made adaptive through parameter changes in the spring device's support force and the permanent magnet's holding force. These parameters can be adjusted based on table top weight, allowing the same mechanism to effectively lock different weights without requiring complex sensors or active control systems.
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 improved stability in the lower parallelogram position and allows for efficient operation by automatically locking and unlocking, ensuring secure and adjustable support for different table top weights.
Implementation Method 1
a permanent magnet acting between the tabletop-side fastening flange and the locking lever, which in the upper parallelogram position holds the locking lever, which has been manually pivoted up from its locking into a release position, in the release position
Data Source
Figure 1a~1b
Figure 2
Figure 3a~3b
AI summary
The high swivel fitting (10) has a table-side mounting plate and a body-side mounting flange connected with each other over two parallelogram guides. A stabilizing lever arm is provided for stabilizing a lower parallelogram position. The stabilizing lever arm is articulated on a side of the table-side mounting plate and the body-side mounting flange.