Press Makeup Pen Mechanism for One-Handed Cosmetic Discharge
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Solution Overview
Problem
Existing cosmetics such as lipsticks, lip glosses, and eyeliners require two-handed operation for discharge, making them inconvenient to use.
Innovation Solution
A retractable press makeup pen with a drive assembly that includes a button, allowing single-handed unidirectional discharge and retraction of cosmetic material using a coupling member and discharge assembly connected to a drive assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a rotating discharge mechanism is used, then cosmetic material can be discharged, but two-handed operation is required making it inconvenient to use
Solution Approach 1:
The discharge mechanism is segmented into independent functional components: a drive assembly with button for user input, a coupling member for transmission, and a discharge assembly for material discharge. This segmentation allows each component to perform its specific function independently, enabling single-handed operation while maintaining mechanical reliability.
Solution Approach 2:
The coupling member acts as an intermediary element between the drive assembly and the discharge assembly. It translates the pressing motion of the button into rotational motion that drives the discharge mechanism, eliminating the need for direct two-handed operation while maintaining the discharge function.
2Loss of substance
If cosmetic material is discharged continuously, then sufficient material is provided, but excess material causes waste and pollution
Solution Approach 1:
The discharge mechanism operates periodically rather than continuously. Each press of the button triggers a discrete discharge cycle where material is discharged in controlled amounts, then retracted. This periodic action ensures sufficient material is provided for use while preventing excessive discharge and waste.
Solution Approach 2:
The discharge assembly is designed to retract excess material back into the storage container after each discharge cycle. This recovering mechanism ensures that only the necessary amount of cosmetic material is discharged for each application, minimizing waste and pollution while maintaining adequate supply.
3Loss of substance
If a retractable mechanism is added, then excess material can be retracted reducing waste, but device complexity increases
Solution Approach 1:
The retractable function is merged with the existing discharge mechanism by using the same coupling member and drive assembly. The button-driven rotation that discharges material also enables retraction when the button is released, eliminating the need for separate retractable components and minimizing the increase in device complexity.
Solution Approach 2:
The coupling member and drive assembly serve multiple functions: they drive both the discharge of cosmetic material and the retraction of excess material. This multi-functionality reduces the need for additional specialized components, thereby limiting the increase in device complexity while achieving waste reduction.
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, accurate discharge control, and efficient retraction of excess material, reducing waste and pollution.
Implementation Method 1
an external thread is provided on an outer sidewall of the threaded rod; the threaded rod is threadedly connected to the drive assembly
Implementation Method 2
the ratchet can drive the ratchet wheel to rotate; and the ratchet wheel can drive the rotating member to rotate
Data Source
AI summary
A retractable press makeup pen includes 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.