Retractable Makeup Pen Ratchet Drive for One-Handed Discharge
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Solution Overview
Problem
Existing cosmetic dispensers, such as those for lipsticks and eyeliners, require two hands for operation and lack convenient unidirectional discharge and retraction mechanisms.
Innovation Solution
A retractable press makeup pen with a drive assembly featuring a button, ratchet seat, and rotating member, allowing single-handed operation for unidirectional discharge and retraction of cosmetic materials using a threaded rod and coupling mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a rotating mechanism is used for cosmetic discharge, then the cosmetic can be delivered, but two hands are required for operation making it inconvenient
Solution Approach 1:
The patent replaces the traditional two-handed rotating mechanical system with a single-handed button-press mechanism. The button assembly with ratchet and pawl mechanism converts a simple linear pressing motion into unidirectional rotational movement, eliminating the need for complex two-handed rotation while maintaining controlled cosmetic discharge functionality.
Solution Approach 2:
The ratchet and pawl mechanism automatically ensures unidirectional rotation and prevents backward movement without requiring user intervention or complex control. The system self-regulates the discharge process through the mechanical interlocking of the ratchet teeth and pawl, allowing single-handed operation while maintaining precise control.
2Loss of substance
If unidirectional discharge is implemented, then material waste is reduced, but a complex drive assembly is required
Solution Approach 1:
The patent extracts the essential function of unidirectional control from a complex multi-component system and implements it through a simplified button assembly with integrated ratchet and pawl mechanisms. This isolation of the unidirectional control function allows for precise material discharge while minimizing the overall structural complexity.
Solution Approach 2:
The ratchet and pawl mechanism provides dynamic control over the discharge process, allowing the cosmetic to move in only one direction based on the button pressing action. This dynamic mechanical control ensures material is discharged only when intended, reducing waste while maintaining a relatively simple overall structure.
3Ease of operation
If single-handed operation is achieved, then ease of use is improved, but precise control over discharge amount may be compromised
Solution Approach 1:
The ratchet and pawl mechanism provides mechanical feedback that ensures precise control over discharge amount. Each button press activates the ratchet to rotate the discharge member by a specific angle, and the pawl provides tactile feedback to indicate when the discharge cycle is complete. This feedback mechanism maintains precision while allowing single-handed operation.
Solution Approach 2:
The button assembly implements periodic action through the ratchet mechanism, where each press produces a discrete, controlled rotation of the discharge member. This periodic engagement of the ratchet teeth with the pawl creates consistent, repeatable discharge amounts while maintaining simple single-handed operation.
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
Facilitates convenient, single-handed operation with precise control over discharge and retraction, reducing material waste and pollution by enabling easy filling and efficient use of cosmetic materials.
Implementation Method 1
a threaded rod (320) fixedly connected to the material loading cylinder (310); an external thread is provided on an outer sidewall of the threaded rod (320); the threaded rod (320) is threadedly connected to the drive assembly
Implementation Method 2
the drive assembly includes a button (410), a ratchet seat (430), and a rotating member (460); the ratchet seat (430) is fixedly provided in the coupling member (220); the button (410) and the rotating member (460) are provided in the ratchet seat (430)
Data Source
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AI summary
The present disclosure provides a retractable press makeup pen, including a nib assembly, a body assembly, a discharge assembly, and a drive assembly, where the nib assembly includes a sleeve; the body assembly includes a barrel and a coupling member rotatably provided in the barrel; the sleeve is fixedly provided in the barrel; the drive assembly is provided in the coupling member; the discharge assembly is provided in the sleeve; the discharge assembly is connected to the drive assembly; the coupling member in rotation can drive the discharge assembly to move along an axial direction of the sleeve; and the drive assembly can drive the discharge assembly to move along the axial direction of the sleeve. The drive assembly is provided in the makeup pen. The drive assembly includes a button. The button is provided on a tail portion of the makeup pen. Pressing the button with a single hand can realize unidirectional discharge. The present disclosure is used conveniently.