Click-Type Applicator Rotary Cam Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional click-type applicators face challenges in propelling high-viscosity contents with a lighter operational feeling while preventing loss of clicking force, and they are complex to manufacture due to the need for multiple parts and intricate mold designs.
Innovation Solution
A click-type applicator design featuring a propelling mechanism with a rotary cam element, transfer cam element, and spring, where the guide slot and projected part convert advancing motion into rotary motion to move the screw shaft and piston, allowing efficient delivery of high-viscosity content without losing clicking force, and incorporating an elastically deformable screw element for simplified assembly and reduced part count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional click-type applicators use multiple separate cam elements and threaded parts formed by injection molding, then the propelling mechanism can deliver high-viscosity content, but the device complexity increases and manufacturing becomes more difficult
Solution Approach 1:
The patent combines multiple separate cam elements into a single integrated cam structure with multiple cam surfaces. The screw element integrates both the cam function and threaded part function into one component. This merging reduces the number of parts while maintaining the propelling mechanism's ability to deliver high-viscosity content effectively.
Solution Approach 2:
The screw element serves multiple functions: it acts as both a cam element (converting rotational motion to linear motion) and a threaded part (advancing the piston). This multi-functionality eliminates the need for separate components, simplifying the overall structure while preserving content delivery efficiency.
2Ease of manufacture
If threaded parts are formed by injection molding with a rotational core, then the propelling mechanism can be manufactured, but the mold becomes complicated and molding troubles occur
Solution Approach 1:
By merging the cam element and threaded part into a single screw element, the patent eliminates the need for complex rotational cores in injection molding. The integrated structure can be formed with simpler molding techniques, reducing mold complexity and avoiding molding troubles associated with sharp-edged rotational cores.
3Manufacturing precision
If the front end of the rotational core is formed with cutting tool-like sharp-edges, then the threaded part can be molded, but the risk of molding trouble increases due to the core being broken
Solution Approach 1:
The integration of cam and threaded functions into one element allows for alternative manufacturing methods that avoid the need for fragile sharp-edged rotational cores. This reduces the risk of core breakage during molding while maintaining the precision needed for functional performance.
4Ease of operation
If conventional designs use separate cam elements, then the propelling mechanism can convert rotational to linear motion, but the number of parts increases and assembly complexity increases
Solution Approach 1:
The screw element combines the cam surface for motion conversion and the threaded portion for piston advancement into a single integrated component. This eliminates the need for separate cam elements and reduces assembly steps, making the propelling mechanism easier to assemble while maintaining full functionality.
Solution Approach 2:
The screw element performs both cam conversion (rotational to linear motion) and threaded engagement (piston advancement) functions simultaneously. This multi-functionality simplifies the assembly process by reducing the number of components that need to be fitted together.
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
The design achieves a lighter operational feeling by transferring clicking force effectively and prevents loss of clicking force, while reducing manufacturing complexity and production costs by integrating components and eliminating the need for separate cam elements.
Implementation Method 1
a spring that urges the propelling element backwards and urges the transfer cam element forwards
Implementation Method 2
when the propelling element is moved forwards by a clicking operation, the advancing motion is transformed into a rotary motion of the transfer cam element in one direction by the function of the guide slot and projected part
Implementation Method 3
a screw shaft having a male thread on the peripheral side thereof is engaged with the rear part of a piston that slides inside the barrel cylinder, the piston is advanced by means of the screw shaft
Data Source
Figure 1(a)~1(b)
Figure 2(a)~2(b)
Figure 3(a)~3(c)
AI summary
To provide a click-type applicator, when delivering a high-viscosity content, with a lighter operational feeling while preventing the loss of clicking force and which can be easily manufactured with a reduced number of parts. In the click-type applicator, when the propelling element 20 is moved forwards by a clicking operation, the advancing motion is transformed into a rotary motion of a transfer cam element 18 in one direction by the function of guide slots 20a of the propelling element and projected parts 18b so that when a cam portion 18a of transfer cam element 18 meshes with a cam portion 16b at the rear of a rotary cam element 16, the rotation of the transfer cam element 18 causes rotary cam element 16 to rotate and thereby move the screw shaft 14 and hence a piston 12 forwards. On the other hand, by releasing the clicking operation, propelling element 20 is moved backwards due to the repulsive force of a spring 18c, and the backward motion is transformed into a rotary motion of transfer camelement 18 in the other direction by the function of the guide slots 20a and projected parts 18b so as to restore the original position, whereby operational actions of the rotary cam element 16 and piston 12 are restrained.