Power Tool Workbench Lock Release for Easier Table Height Adjustment
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Solution Overview
Problem
Existing workbenches for power tools, such as desk circular saws, have cumbersome lock mechanisms that require users to operate a claw under the table, making it difficult to adjust and lock the table height effectively.
Innovation Solution
A workbench design featuring a handle for vertical adjustment of the table, a lock mechanism that secures the table at multiple heights, and a release arm that allows easy unlocking by pulling an elongated element, reducing the need for under-table operation and enhancing usability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the claw is disposed on the underside of the table for locking, then the lock mechanism can prevent the table from lowering, but the user needs to reach under the table and operate the claw in a blind way which is cumbersome
Solution Approach 1:
The lock release member is extended along the table in the longitudinal direction, transforming the operation from a vertical reach-under-the-table motion to a horizontal pulling motion along the table surface. This dimensional change allows users to operate the lock mechanism from the front of the table rather than reaching underneath it.
Solution Approach 2:
The lock release member acts as an intermediary element that transmits the user's pulling force to the claw mechanism. By pulling the lock release member horizontally along the table, the user indirectly actuates the claw to release the lock, eliminating the need to directly reach under the table.
2Volume of moving object
If the table is moved between lower and upper positions for storage and working, then space efficiency is improved, but the lock mechanism must reliably prevent abrupt lowering which complicates the design
Solution Approach 1:
The lock mechanism utilizes the table's own weight and the gravitational force acting on it to maintain the locked position. When the claw engages with the protrusion, the downward force of gravity on the table reinforces the locking action, eliminating the need for additional locking force mechanisms or complex spring systems.
Solution Approach 2:
Instead of using a mechanism that actively pushes or locks the table in place, the design allows the table to naturally want to lower due to gravity, and the claw mechanism simply prevents this natural tendency. The lock works by resisting the natural gravitational force rather than opposing it actively.
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 design improves usability by simplifying the lock release operation, allowing users to easily adjust and lock the table height, supports the table's weight during lowering, and optimizes space for storage, while avoiding interference with the power tool's operation.
Implementation Method 1
A shaft rotatably connects intersections of the first and second support legs. When the user raises or lowers the handle, the first and second support legs rotate on the shaft
Implementation Method 2
a lock mechanism that prevents the upper end of the second support leg and the table from moving with respect to each other in a direction to lower the table when the table is moved between a lower position of a predetermined height and a predetermined upper position higher than the lower position, thereby locking the table in the upper position
Data Source
AI summary
It is an object of the invention to provide a technique to improve usability of a workbench for a power tool. To achieve the object, a representative workbench for a power tool is provided with a table, first and second supports, a shaft, a handle body, a handle, a lock mechanism and a lock release member. The lock release member includes an elongated element disposed below the upper surface of the table and extending along the table toward the handle, and the lock of the table is released when the user pulls the elongated element in the longitudinal direction of the elongated element. According to the invention, the user can release the lock of the table simply by pulling the elongated element, so that ease of lock releasing operation is enhanced.