Leadholder System Refilling via Axial Insertion Channel

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Solution Overview

Problem

Users face difficulties in refilling the lead container of multi-function writing instruments due to complex removal processes, which can lead to loss of lead-holder mechanism components.

Innovation Solution

A lead-insertion through-channel extending in the axial direction allows new leads to be inserted into the lead container without removing the lead-holder system, utilizing a retention device that switches between lead retention and insertion positions by gravity, facilitated by a chamber and ball mechanism.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the lead-holder system is removed from the multi-function writing instrument to refill the lead container, then the user can access the lead container, but the process becomes complex and difficult to perform

Engineering Contradiction:

Improveease of refillingVSAvoidcomplexity of removal process

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent extracts the refilling function from the complex lead-holder system by providing a dedicated refilling access. The lead container is made accessible through a specific opening or removable component that allows users to refill leads without having to remove the entire lead-holder system from the writing instrument, thereby simplifying the refilling operation while maintaining secure containment during normal use.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent introduces an intermediary mechanism (such as a removable cap, sliding cover, or dedicated access opening) that mediates between the user and the lead container. This intermediary component can be easily opened or removed for refilling purposes and then securely closed to maintain the integrity of the lead-holder system during writing operations, thus simplifying the refilling process without compromising the overall system.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If the lead-holder mechanism is removed to refill the lead container, then the container can be accessed, but elements of the lead-holder mechanism such as the spring may be lost

Engineering Contradiction:

Improveease of refillingVSAvoidrisk of component loss

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent extracts only the necessary refilling function from the lead-holder mechanism by providing a dedicated access point to the lead container. This allows users to refill leads without removing the lead-holder mechanism itself, thereby eliminating the risk of losing internal components such as springs while still enabling easy access to the lead container for refilling purposes.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent introduces an intermediary access mechanism (such as a removable cap or sliding cover) that provides safe access to the lead container without requiring removal of the lead-holder mechanism. This intermediary component protects internal components like springs from being lost while still allowing users to refill leads conveniently.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Ease of operation

If the lead container is made accessible for refilling, then users can easily refill leads, but the containment of leads may be compromised

Engineering Contradiction:

Improveease of refillingVSAvoidloss of leads

Core Design Contradiction:

Ease of operationVSLoss of substance

Solution Approach 1:

The patent extracts the refilling function from the main body of the lead container by providing a dedicated access opening or removable component. This allows users to refill leads through a controlled access point without having to open the entire container, thereby maintaining lead containment while enabling easy refilling operations.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent introduces an intermediary access mechanism (such as a removable cap, sliding cover, or controlled opening) that allows users to refill leads while maintaining the integrity of the lead container. This intermediary component can be opened for refilling and then securely closed to prevent lead loss, thus balancing ease of refilling with effective lead containment.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 easy and convenient refilling of leads without disassembling the lead-holder system, preventing lead loss and simplifying the process while maintaining effective lead containment.

Implementation Method 1

a retention device that switches between lead retention and insertion positions by gravity, facilitated by a chamber and ball mechanism

Methodology Applied

Scientific EffectGravity: Gravitation

Data Source

PatentUS11230137B2Multi-function writing instrument comprising a leadholder system

Publication Date: 2022.01.25 SOCIETE BIC SA

AI summary

A multi-function writing instrument comprises a body extending in an axial direction and a radial direction, and having at least two writing elements arranged inside the body, each writing element comprising a writing head and a button, at least one button extending in the radial direction through a window and allowing the writing element to be moved between a retracted position in which the writing head is retracted into the body and a writing position in which the writing head projects from the body, and one of the writing elements being a leadholder system comprising a leadholder mechanism and a lead container, the button of the leadholder system comprising a lead-insertion channel extending in the axial direction.