Pliers With Concave Arc Chipping Blade for Safe Workpiece Processing

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Solution Overview

Problem

Conventional multifunction pliers pose safety risks and potential damage to workpieces due to exposed knives that require handles to be opened for cutting and chipping operations, leading to user injury and workpiece damage.

Innovation Solution

A pliers design featuring a chipping blade in a concave arc shape on one of the pliers backs, with a pivotally connected clamp system that keeps knives hidden during chipping, utilizing an arc-shaped recess and straight cut with reduced blade angles to enhance safety by minimizing edge contact.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the handles are opened to expose the knives for cutting and chipping operations, then the cutting and chipping functions can be performed, but the user may be injured and the workpiece may be damaged

Engineering Contradiction:

Improvecutting and chipping functionVSAvoiduser injury and workpiece damage

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The chipping function is extracted from the traditional knife-based system and implemented as a separate chipping blade integrated into the pliers back. This allows the chipping operation to occur without exposing the knives, as the chipping blade operates independently while the handles remain closed, thus maintaining versatility while eliminating the safety hazard of exposed knives

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The chipping blade is nested within the structure of the pliers back, specifically integrated into the first or second pliers back. This nesting allows the chipping function to be contained within the closed handle configuration, enabling both cutting/chipping functions without requiring handle opening, thereby preventing user injury and workpiece damage while maintaining functional versatility

Inventive Principle:

Principle #7Nested doll (Nesting)

2Ease of operation

If the knives on inner sides of the two pliers are used for cutting in the middle part of the workpiece, then the cutting operation can be performed, but other portions of the workpiece may be damaged

Engineering Contradiction:

Improvecutting operationVSAvoidworkpiece damage

Core Design Contradiction:

Ease of operationVSObject-generated harmful factors

Solution Approach 1:

The chipping function is extracted from the knife-based system and implemented as a dedicated chipping blade on the pliers back, allowing chipping operations to be performed independently without using the knives. This separation enables precise chipping without the risk of damaging other workpiece portions that would occur when using knives for middle-section chipping

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Instead of using the knives for both cutting and chipping operations (which causes workpiece damage), the invention inverts the approach by providing a specialized chipping blade for chipping operations and restricting knives to cutting operations only. This functional inversion prevents workpiece damage while maintaining ease of operation for both cutting and chipping

Inventive Principle:

Principle #13The other way round (Inversion)

3Productivity

If the chipping blade is made with sharp edges for effective chipping, then the chipping operation can be performed efficiently, but the user may be injured when touching the blade edge

Engineering Contradiction:

Improvechipping efficiencyVSAvoiduser injury from blade edge

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The chipping blade is designed with non-uniform edge characteristics: the working surface (arc-shaped recess) maintains sufficient sharpness for effective chipping, while the peripheral edges are rounded or blunted. This local differentiation allows efficient chipping operations while eliminating the injury hazard from sharp peripheral edges that users might accidentally touch

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The chipping blade incorporates an arc-shaped recess with curved surfaces instead of sharp linear edges. The curved geometry provides the necessary cutting edge for chipping efficiency while the rounded form factor inherently prevents user injury by eliminating sharp corners and edges that could cause harm during normal handling and operation

Inventive Principle:

Principle #14Spheroidality (Curvature)

Data Source

PatentUS11801585B2Pliers

Publication Date: 2023.10.31 CHICONY POWER TECH CO LTD

AI summary

A pliers includes a first pliers body (10) and a second pliers body (20). The first pliers body includes a first handle (11) and a first clamp (12). A first pliers knife (13) and a first pliers back (14) are disposed on the first clamp (12). The second pliers body (20) includes a second handle (21) and a second clamp (22). A second pliers knife (23) and a second pliers back (24) are disposed on the second clamp (22). The second clamp (22) is pivotally connected with the first clamp (12) to clamp or cut. The first pliers back (14) or the second pliers back (24) is provided with a chipping blade (50) configured in a concave arc shape for chipping.