Actuator-Type Combination Square for Knob-Free Blade Clamping
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Solution Overview
Problem
Existing combination squares require cumbersome rotation of a knob to lock or release the blade, making it difficult to maintain the desired position of the blade relative to the head during clamping operations.
Innovation Solution
An adjustable combination square with an actuator arrangement that includes actuator members movable between an operative and a release position, allowing for easy locking and releasing of the blade without the need for knob rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a clamping screw with a rotatable knob is used to lock the blade, then the blade can be securely held in position, but the operation becomes cumbersome and it is difficult to maintain the desired blade position during clamping
Solution Approach 1:
Instead of rotating a knob to move the clamping screw longitudinally (conventional approach), the invention inverts the actuation direction: the actuator members move transversely (perpendicular to the blade) to engage or disengage the blade. This inversion transforms a cumbersome rotational motion into a simple linear pressing motion, greatly improving ease of operation while maintaining secure blade holding capability.
Solution Approach 2:
The invention introduces actuator members as intermediary elements between the user's finger and the blade. These actuator members translate the simple transverse pressing motion into the necessary longitudinal clamping action on the blade, mediating between the user's easy input motion and the required secure blade positioning.
2Manufacturing precision
If a rotatable knob is used to adjust the blade position, then the blade can be locked in place, but the user cannot easily maintain the desired position during the clamping operation
Solution Approach 1:
The invention inverts the control mechanism: instead of requiring the user to rotate a knob and struggle to maintain rotational position, the user simply presses the actuator members transverse to the blade. The actuator members inherently maintain their engaged position without requiring continuous user input, allowing precise blade positioning to be easily maintained throughout the clamping operation.
3Ease of operation
If the actuator members are moved in a direction transverse to the blade, then the operation is simplified and blade position is easily maintained, but a different actuation mechanism is required compared to conventional designs
Solution Approach 1:
The actuator members are designed to be movably mounted to the head, allowing them to dynamically transition between engaged and disengaged positions. This dynamic capability enables the simple transverse motion to effectively control blade clamping, achieving ease of operation while accommodating the structural changes needed for the new actuation mechanism.
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 actuator arrangement simplifies the process of locking and releasing the blade, enabling users to maintain the desired position more easily and efficiently, thus enhancing user-friendliness and operational precision.
Implementation Method 1
A spring may be interposed between and act on the first and second actuator tabs to bias the actuator tabs away from each other
Data Source
AI summary
An adjustable combination square includes a head defining a channel and a longitudinally extending blade positioned for movement within the channel. The blade defines a slot along at least a portion of its length. An actuator arrangement is carried by the head, and is configured to releasably hold the blade in place relative to the head. The actuator is movably mounted to the head for movement between an operative position and a release position in response to application of a force in a direction transverse to the blade, which may be a pinch-type force exerted on a pair of actuator members incorporated in the actuator arrangement. The actuator arrangement may include a blade engagement member that is movably mounted to the head, and the actuator members act on the blade engagement member to selectively clamp the blade in position relative to the head.