Permanent Rod With Detachable Pressing Members For Wave Formation
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Solution Overview
Problem
Existing permanent rods are limited in creating various waves in hair styling, as they lack structural features to accommodate different wave formations beyond the conventional winding method.
Innovation Solution
A permanent rod with a tubular body part and detachable pressing members featuring cut surfaces, pressing recesses with concave-convex shapes, and ring-seating grooves, allowing for multiple wave formations without an auxiliary rod, and maintaining waves through injection-holes in the pressing members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the conventional winding method is used on a simple tubular rod, then the structure remains simple, but the ability to create various waves is limited
Solution Approach 1:
The rod body is divided into multiple sections along its length, with each section having different surface characteristics (smooth sections for basic winding, pressing sections with protrusions for defined waves, grooved sections for creased waves). This segmentation allows a single rod to create multiple wave types without requiring multiple specialized rods, thus improving versatility while maintaining reasonable structural complexity
Solution Approach 2:
Different portions of the rod body are given different local qualities - some areas have pressing protrusions, others have grooves, and others remain smooth. This local differentiation enables the rod to perform multiple wave-creating functions at different locations along its length, resolving the contradiction between versatility and structural simplicity
2Stability of the object's composition
If the rod body is made with cut surfaces to prevent warping, then structural stability improves, but manufacturing complexity increases
Solution Approach 1:
The rod body incorporates asymmetric cut surfaces that are precisely angled and positioned to counteract the natural tendency of the rod to warp during hair winding. These asymmetric features create internal stress distributions that balance and prevent warping, improving structural stability while adding moderate manufacturing complexity through precise cutting operations
3Adaptability or versatility
If pressing members are detachably coupled to create various waves, then wave formation versatility improves, but device complexity and operation time increase
Solution Approach 1:
The pressing members are designed to be detachably coupled to the rod body, allowing users to attach or remove them as needed for different wave styles. This dynamic configuration enables versatility in wave formation while allowing quick adjustment - users can rapidly attach or remove pressing members without complex assembly procedures, thus reducing the time penalty associated with added functionality
Data Source
AI summary
The present invention relates to a permanent rod. The permanent rod includes a tube-shaped rod body. In the rod body, a pair of cut surfaces is provided to form a band-shaped insertion opening over the entire longitudinal section of the rod body, and a plurality of compression grooves each having a concave bottom surface are formed in the outer surface of the rod body over the entire longitudinal section. Also, the permanent rod includes: a compression member body having a compression surface corresponding to each of the grooved bottom surfaces; and a compression member detachably coupled to the rod body so that the compression surface contacts the grooved bottom surface. Therefore, the permanent rod may create various wave styles.