Lipstick Tube Torque Control via Elastic Pads and Spiral Grooves
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Solution Overview
Problem
Lipstick tube containers face challenges in controlling the torque of relative rotation between the inner and outer cylinder bodies, affecting the smoothness of lipstick dispensing and user experience.
Innovation Solution
Incorporating an inner cylinder body with longitudinal through holes, an outer cylinder body with spiral grooves, and a support cylinder body with convex columns, along with elastic pads and sheets between the cylinder bodies to control torque and ensure smooth rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional lipstick tube structure is used without elastic components, then the structure is simple, but the torque control during rotation is poor and the operation is not smooth
Solution Approach 1:
The patent introduces elastic pads and elastic sheets that change their elastic parameters during rotation. The elastic pads are pressed between the inner and outer cylinder bodies, and the elastic sheets wrap around the inner cylinder body, both undergoing elastic deformation to provide dynamic torque control. This allows the torque to be automatically adjusted during the spin-in and spin-out operations, ensuring smooth rotation without requiring complex mechanical control mechanisms.
Solution Approach 2:
The elastic pads and elastic sheets act as intermediary elements between the inner cylinder body and the outer cylinder body. These elastic components mediate the interaction between the two cylinder bodies during rotation, providing a cushioning effect and controlling the torque transmission. The elastic sheets wrap around the inner cylinder body and contact the outer cylinder body, while the elastic pads are positioned between the cylinder bodies, both serving as intermediaries to achieve smooth torque control.
2Ease of operation
If elastic pads and sheets are added to control torque, then the rotation smoothness is improved, but the device complexity increases
Solution Approach 1:
The elastic pads and elastic sheets utilize elastic parameter changes to control torque dynamically. The elastic pads are pressed between the inner and outer cylinder bodies with a pressing force, and the elastic sheets wrap around the inner cylinder body. During rotation, these elastic components deform and recover, automatically adjusting the torque to ensure smooth operation without requiring additional complex control mechanisms.
Solution Approach 2:
The elastic pads and elastic sheets are simple, inexpensive elastic components that can be easily manufactured and replaced. Rather than using complex mechanical torque control mechanisms, the patent employs these simple elastic elements that provide effective torque control through their elastic properties. If these elastic components wear out or fail, they can be easily replaced without affecting the overall structure of the lipstick tube.
3Reliability
If multiple elastic components are used to share torque, then the reliability is improved, but the manufacturing complexity increases
Solution Approach 1:
The elastic pads and elastic sheets serve as beforehand cushioning elements that protect the lipstick tube mechanism from torque shocks and wear. By positioning the elastic pads between the inner and outer cylinder bodies and wrapping the elastic sheets around the inner cylinder body, the design provides advance protection against mechanical failures. This cushioning effect distributes the mechanical stress and prevents sudden failures, improving the overall reliability and durability of the lipstick tube.
Solution Approach 2:
The elastic components utilize changes in elastic parameters to provide redundant torque control. The elastic pads and elastic sheets can independently or collectively control the torque during rotation. If one elastic component fails or wears out, the other components can continue to provide torque control, ensuring the lipstick tube remains functional. This parameter-based control approach simplifies the manufacturing process compared to complex mechanical redundancy systems.
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 elastic pads and sheets jointly control the torque of relative rotation, enhancing user experience by ensuring smooth operation and durability, even if one component fails, by sharing torque and providing appropriate frictional force.
Implementation Method 1
at least one elastic pad and at least one elastic sheet are formed between the inner cylinder body and the outer cylinder body... the elastic pad and the elastic sheet can cooperate to jointly control the torque of the relative rotation of the inner cylinder body and the outer cylinder body
Data Source
AI summary
A container for a rod-shaped material, comprising: an inner cylinder body having at least one longitudinal through hole formed in a side wall of the inner cylinder body; an outer cylinder body having at least one spiral groove formed on an inner wall of the outer cylinder body; and a support cylinder body for supporting the rod-shaped material, an outer wall of the support cylinder body having at least one convex column; wherein the inner cylinder body is accommodated in the outer cylinder body and rotatable relative to the outer cylinder body, the support cylinder body is accommodated in the inner cylinder body, the convex column is inserted into the longitudinal through hole and the spiral groove, such that the convex column moves along the spiral groove when the inner cylinder body rotates relative to the outer cylinder body; wherein at least one elastic pad and at least one elastic sheet are formed between the inner cylinder body and the outer cylinder body, the elastic pad is floatingly arranged in a radial direction of the inner cylinder body or the outer cylinder body, and the elastic sheet is arranged in a circumferential direction of the inner cylinder body or the outer cylinder body.