Adjustable Handheld Angle for Pliers via Rotatable Joint
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Solution Overview
Problem
Existing open-close handheld tools are inconvenient for users due to fixed angles between handheld and clamping portions, making it difficult to operate large objects and accommodating different hand sizes and force habits, leading to increased effort and discomfort.
Innovation Solution
The design includes rotatable handheld portions relative to clamping portions with a locking mechanism, allowing users to adjust the angle to a comfortable position, facilitating easier operation by matching the tool's angle to the user's hand size and force habit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the angle between handheld portions and clamping portions is fixed, then the structure is simple, but the user cannot adjust to different hand sizes and force habits
Solution Approach 1:
The patent applies the dynamics principle by making the handheld portion rotatable relative to the clamping portion, transforming the fixed angle structure into an adjustable one. The handheld portion can rotate around the axle pin to change the angle between handheld and clamping portions, allowing adaptation to different user hand sizes and force habits while maintaining operational stability through the locking mechanism.
Solution Approach 2:
The patent segments the tool into distinct functional parts: the clamping portion, the handheld portion, and the locking mechanism. This segmentation allows the handheld portion to be independently adjusted relative to the clamping portion, enabling angle customization without redesigning the entire tool structure.
2Force
If the angle between clamping portions is large for large objects, then the clamping capability is improved, but the distance between end parts of handheld portions increases making it difficult to exert force with one hand
Solution Approach 1:
The patent resolves this contradiction by allowing dynamic adjustment of the handheld portion angle independently from the clamping portion angle. When clamping large objects requiring a large clamping portion angle, the user can simultaneously adjust the handheld portion to a more convenient angle that reduces the distance between its end parts, making it easier to exert force with one hand while maintaining effective clamping capability.
3Ease of operation
If the handheld portions are rotatable relative to clamping portions, then the user can adjust to comfortable angles, but the locking mechanism increases device complexity
Solution Approach 1:
The locking mechanism is designed to be operated by the user through simple manual action (pressing the button or manipulating the locking component), allowing the user to lock and unlock the handheld portion at desired angles without requiring complex external mechanisms or tools. The mechanism serves itself by using the user's operational input to maintain or change the locked position.
Data Source
AI summary
The present invention relates to an open-close handheld apparatus and a method of adjustment of the angle between the handheld portions thereof. The open-close handheld apparatus includes a first member and a second member. The first member includes a first clamping portion and a first handheld portion. The second member includes a second clamping portion and a second handheld portion. The first clamping portion and the second clamping portion are rotatably and movably connected via a first axle pin. The first clamping portion and the second clamping portion open and close relative to each other, the plane in which the open-close path thereof is located is an open-close plane. The first handheld portion is rotatably connected to the first clamping portion. The plane in which the rotation path of the first handheld portion is located is the same as or parallel to the open-close plane. A locking arrangement is provided at the joint between the first handheld portion and the first clamping portion, used for locking or unlocking the first handheld portion and the first clamping portion.