Adjustable Pliers With Self-Engaging Tooth Mechanism
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Solution Overview
Problem
Conventional pliers require manual finger pressure to adjust the clamping distance, making it inconvenient to clamp objects in limited spaces where arm access is restricted, often necessitating multiple adjustments by visual measurement.
Innovation Solution
A pliers design featuring a first pliers body with an elongate hole and parallel tooth portions, a second pliers body stacked in a cross manner, and a control member with a rod portion and engaging unit, allowing the second pliers body to move relative to the first without pressing, enabling adjustable clamping distance without manual finger pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual finger pressure is applied to adjust the clamping distance, then the clamping distance can be adjusted, but it becomes inconvenient to operate in limited spaces where arm access is restricted
Solution Approach 1:
The pliers enable self-adjustment through the elastic member that automatically pushes the pivot shaft to engage with tooth grooves, allowing the clamping distance to be adjusted without requiring manual finger pressure on the pivot shaft. The user simply needs to slide the second pliers body relative to the first, and the elastic member handles the engagement/disengagement automatically.
Solution Approach 2:
The elastic member acts as an intermediary between the pivot shaft and the tooth grooves, providing automatic engagement and disengagement forces. This eliminates the need for direct manual manipulation of the pivot shaft, allowing adjustment through simple sliding motion rather than requiring finger pressure in confined spaces.
2Productivity
If the pivot shaft is pressed manually to detach the tooth portion, then the pliers bodies become slidable for adjustment, but multiple adjustments are required when working in confined spaces
Solution Approach 1:
The elastic member provides continuous pushing force on the pivot shaft, enabling automatic engagement with tooth grooves during sliding motion. This self-service mechanism eliminates the need for repeated manual pressing and checking, allowing the user to adjust the clamping distance in a single continuous sliding action rather than through multiple trial adjustments.
3Stability of the object's composition
If the tooth portion is engaged in the tooth groove to position the pivot shaft, then the clamping distance is fixed, but the user cannot adjust it without pressing the pivot shaft
Solution Approach 1:
The system dynamically transitions between engaged and disengaged states through simple sliding motion. The elastic member provides the force needed to overcome engagement resistance during sliding, allowing the pivot shaft to automatically disengage from the tooth groove when the user slides the second pliers body relative to the first, without requiring direct manipulation of the pivot shaft.
Data Source
AI summary
A pliers has guiding surfaces at tooth portions of the first pliers body and tooth portions of the engaging unit of the control member. Therefore, when the pressing block of the control member is not pressed, even if the first pliers body is engaged with the tooth portions of the engaging unit, the second pliers body can still be pushed forward relative to the first pliers body, so that the second guiding surfaces of the second tooth portions of the engaging unit slide relative to the first guiding surfaces of the first tooth portions and each of the first tooth portions is moved to engage with a next corresponding second tooth portion, thereby allowing the second pliers portion being movable toward the first pliers portion. Hence, the clamping distance of the pliers can be adjusted to match with an object to be clamped.