Cosmetic Container Hinge Boss Radius Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing cosmetic containers with spring-biased covers suffer from reduced operability due to increased friction between the sliding projection and the cover-rotatably-attached portion, making it difficult to engage and disengage the hook mechanism for opening and closing, requiring significant user effort.
Innovation Solution
A cosmetic container design featuring a hinge boss with a radius reduction portion that generates frictional contact with a pressure member at a position apart from the hinge pin and hook mechanism, and a pressure member made of flexible material to slow down the cover's rotation speed, with the radius reduction portion starting at 90 degrees from the closed position and extending to full-opened position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the sliding projection is positioned on the line between the hinge pin and hook mechanism to generate friction, then the cover rotation speed is slowed down, but the tensile force on the hook mechanism increases making opening and closing more difficult
Solution Approach 1:
The friction generation point is moved from the line between hinge pin and hook mechanism to a different spatial dimension/position (apart from that line). This dimensional change allows friction to be generated without creating tensile force on the hook mechanism, resolving the contradiction between slowing cover rotation and maintaining ease of operation.
Solution Approach 2:
The pressure member acts as an intermediary between the cover and the friction generation system. By using this intermediate component to apply friction at a specific position apart from the hook mechanism line, the system achieves controlled deceleration without directly transmitting tensile forces to the hook mechanism.
2Speed
If friction is generated between the sliding projection and cover-rotatably-attached portion, then the cover is pressed backward, but significant power is required to disengage the hook to open the cover
Solution Approach 1:
The friction application point is relocated to a position apart from the line connecting hinge pin and hook mechanism. This spatial repositioning changes the force vector geometry, allowing friction to control rotation speed without creating backward pressure that would increase the force needed to disengage the hook.
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
This design enhances the operability of opening and closing the cover by reducing the tensile force required and improving the ease of engaging and disengaging the hook mechanism, allowing for smoother and less strenuous operation.
Implementation Method 1
a pressure member which causes a frictional contact with the hinge boss to slow down the rotation speed of the hinge boss
Implementation Method 2
a radius reduction portion which is formed by that the outer dimension of the hinge boss is reduced gradually as the cover is getting closer to its full-opened position, for the purpose of weakening a frictional contact function with the pressure member
Data Source
AI summary
A case body is provided with a cover which opens from and closes against the case body. The cover includes a hinge boss rotatably attached to the case body through a hinge pin. On the opposite side of the hinge pin is provided a hook mechanism with which the cover is engaged with the case body to form a closed state. A pressure member contacts and presses to the hinge boss to reduce the rotation speed of the hinge boss. A radius reduction portion is formed so that the outer dimension of the hinge boss is reduced gradually as the cover is getting closer to its full-opened position in order to weaken a frictional contact function with the pressure member.