Liquid Make-up Receptacle Cap Shoulder Coupling Mechanism
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Solution Overview
Problem
Conventional liquid make-up receptacles with attached sponges are difficult to replace due to adhesive issues, and the sponge holder may detach unexpectedly with the cap when opened.
Innovation Solution
A liquid make-up receptacle design featuring a housing with a discharge part, a shoulder, a ring, and a cap, where the cap and shoulder are coupled in a threaded or force-fitting manner to prevent the ring from detaching with the cap, allowing for easy replacement of the application member and ring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the sponge is adhered using glue to the tube outlet, then the sponge is securely attached, but it becomes difficult and inconvenient for users to replace the sponge with a new one
Solution Approach 1:
The invention divides the application member assembly into separable components: the sponge (application member), the sponge holder, and the cap. This segmentation allows the sponge to be easily replaced by detaching the entire sponge holder assembly from the tube outlet, while the sponge itself remains securely attached to the holder during normal use.
Solution Approach 2:
The invention introduces a dynamic coupling mechanism between the cap and sponge holder that transitions from a fixed strong bond to a easily separable connection. The cap includes a detachment structure that allows users to easily separate the cap (with attached sponge holder) from the tube outlet, enabling simple replacement of the application member.
2Ease of operation
If the cap is coupled to the sponge holder to enable easy replacement, then the ease of replacement is improved, but the sponge holder may unexpectedly become detached together with the cap when the cap is opened
Solution Approach 1:
The invention applies different coupling strengths to different parts of the assembly. The cap is strongly coupled to the sponge holder through threaded engagement or interference fit, ensuring the sponge holder remains attached during normal cap opening/closing operations. However, the entire sponge holder assembly is designed with a detachment structure that allows intentional separation from the tube outlet when replacement is needed.
Solution Approach 2:
The invention introduces a detachment structure as an intermediary mechanism between the cap and the tube outlet. This detachment structure (comprising protrusions and grooves) acts as a controlled release mechanism that prevents accidental detachment during normal use but allows easy intentional separation for replacement purposes.
3Force
If the cap and sponge holder are strongly coupled, then the coupling force increases, but the sponge holder may still detach unexpectedly when the cap is opened due to coupling force
Solution Approach 1:
The invention employs asymmetric coupling mechanisms where the cap is strongly coupled to the sponge holder through threaded engagement or interference fit in one direction, but the detachment structure allows easy separation in the opposite direction. The detachment structure features protrusions on the cap that fit into grooves on the sponge holder, creating strong engagement during normal use but enabling controlled detachment when needed.
Data Source
AI summary
A liquid cosmetic container, comprising: a housing which has an opening at one side and contains liquid materials in an inner space; a discharge portion, one end of which is coupled with the opening of the housing and the other end has discharge protrusions for discharging the materials; a shoulder which includes a body having a through-hole in the center, a lower insertion portion for coupling with the housing or the discharge portion and an upper insertion portion formed at the upper part of the body; a ring with a hollow body and a connecting portion coupled with the upper insertion portion of the shoulder at the lower part of the body; a cosmetic application member inserted into the ring and which has a through-hole where the discharge protrusions of the discharge portion are inserted; and a cap coupled with the shoulder portion.