One-Handed Cable Tie Plier With Spring-Driven Ratchet Mechanism

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Solution Overview

Problem

Traditional tie pliers require two-handed operation and have a complex, bulky structure, making them inconvenient to use in special occasions and difficult to assemble.

Innovation Solution

A tie plier design featuring a head, locking assembly, first handle, and second handle with a ratchet assembly and reset tension spring, allowing one-handed operation and a compact, simplified structure with adjustable handle positions and a cutting assembly for flexible tie tightening and cutting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If traditional tie plier structure is used with one handle motionless and the other manually reciprocated, then the tie tightening function is achieved, but two-handed operation is required which is inconvenient in special occasions

Engineering Contradiction:
Improveoperation convenienceVSAvoidspecial occasion adaptability
Core Design Contradiction:
Ease of operationVSAdaptability or versatility

Solution Approach 1:

The patent makes both handles movable rather than having one fixed handle. The first handle can be manually reciprocated while the second handle is spring-driven to automatically reciprocate, allowing the tool to be operated with one hand in special occasions while maintaining the ability for two-handed operation when needed

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The second handle is equipped with a spring-driven mechanism that automatically reciprocates the handle without manual input. Once the first handle is activated, the spring mechanism self-propels the second handle through tightening strokes, reducing the operator's workload and enabling one-handed operation

Inventive Principle:
Principle #25Self-service

2Ease of manufacture

If traditional tie plier structure is used with manual reciprocation of one handle, then the tightening function is achieved, but the tightening part becomes complicated in structure resulting in complicated assembly

Engineering Contradiction:
Improveassembly simplicityVSAvoidtightening part complexity
Core Design Contradiction:
Ease of manufactureVSDevice complexity

Solution Approach 1:

The patent divides the tightening mechanism into separate functional modules: a ratchet assembly for unidirectional motion control, a spring-driven mechanism for automatic reciprocation, and a handle linkage system. This segmentation allows each component to be manufactured and assembled independently, simplifying the overall assembly process

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent introduces a ratchet assembly as an intermediary mechanism between the handles and the tie tightening function. The ratchet assembly converts the reciprocating motion of the handles into unidirectional tightening force, simplifying the connection between manual operation and tie tightening while reducing structural complexity

Inventive Principle:
Principle #24Intermediary (Mediator)

3Device complexity

If traditional tie plier structure is used with manual reciprocation, then the tightening function is achieved, but the product becomes bulky as a whole

Engineering Contradiction:
Improveproduct compactnessVSAvoidplier weight
Core Design Contradiction:
Device complexityVSWeight of moving object

Solution Approach 1:

The patent nests the spring-driven mechanism and ratchet assembly within the handle structure itself, rather than adding separate external components. The spring is housed within the second handle, and the ratchet assembly is integrated into the handle linkage, creating a compact design that reduces overall product size and weight

Inventive Principle:
Principle #7Nested doll (Nesting)

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

Enables convenient one-handed or two-handed operation with continuous tightening and flexible cutting, reducing the complexity and bulk of the device while maintaining effective tie management.

Implementation Method 1

a reset tension spring is connected between the second handle and the head

Methodology Applied
Scientific EffectSpring: Spring

Implementation Method 2

a ratchet assembly is provided on the second handle and is connected with the locking assembly

Methodology Applied
Scientific EffectRatchet: Ratchet

Implementation Method 3

the ratchet assembly is connected to the transmission part

Methodology Applied
Scientific EffectMechanical Advantage: Mechanical Advantage

Data Source

PatentUS20240181605A1Cable tie plier
Publication Date: 2024.06.06 ZHUJI ITOP HARDWARE TOOL CO LTD
  • US20240181605A1 patent drawing
  • US20240181605A1 patent drawing
  • US20240181605A1 patent drawing

AI summary

A tie plier is provided, which includes a head, a locking assembly, a first and second handle. The first handle is connected to an end of the head, the locking assembly is movably connected to the head, a ratchet assembly is provided on the second handle and is connected with the locking assembly, a reset tension spring is connected between the second handle and the head, a jaw is provided on the head and is arranged close to the locking assembly, and a cutting assembly is provided at a side of the jaw. The tie plier can be operated by one hand to tighten the tie. Moreover, the tightening mechanism is compact and simplified in structure, and a holding angle between the first and second handle can be adjusted, thus a one-handed operation can be carried out more conveniently, and tie tightening operations in various special occasions can be made.