Headlamp Strip With Z-Shaped Conductor for Comfortable Fit
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Solution Overview
Problem
Existing headlamp straps cause discomfort due to the tension of the spring or spiral used for electrical connection, and are bulky, affecting aesthetics and compactness, while failing to provide a discreet, comfortable, and elegant solution for adjusting to various head sizes and helmets.
Innovation Solution
A novel headlamp headband structure with a front portion and a rear portion, connected by an elastic tightening tie that forms adjustable loops, and an electrical conductor with two radii of curvature forming a 'Z' shape, allowing sliding connections with the tightening tie and providing a compact, adjustable, and comfortable fit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a spring or spiral electrical conductor is used to ensure adjustment configurations, then the headband can be stretched to fit various head shapes, but significant discomfort is caused due to the restoring force tension
Solution Approach 1:
The patent removes the spring element from the electrical conductor assembly, extracting the source of discomfort. The electrical conductor is made as a flat, flexible cable without elastic restoring force, eliminating the harmful tension while maintaining electrical connectivity between the headlamp and battery.
Solution Approach 2:
The patent changes the physical parameters of the electrical conductor from a spiral/spring configuration with elastic properties to a flat cable with minimal elasticity. This parameter change reduces the restoring force from significant to negligible, eliminating discomfort while preserving the ability to accommodate head shape variations through the flexible cable's natural flexibility.
2Adaptability or versatility
If a spring or spiral electrical conductor is used for adjustment, then various adjustment configurations are enabled, but the spring is relatively large and bulky, detrimental to aesthetics and compactness
Solution Approach 1:
The patent extracts the bulky spring element from the electrical conductor assembly, replacing it with a flat cable. This removal eliminates the large volume occupied by the spring while maintaining the electrical connection function and adjustment capability through the flexible cable's ability to bend and conform.
Solution Approach 2:
The patent employs a flat, flexible cable instead of a three-dimensional spring structure. This thin-film-like cable achieves the necessary flexibility and adjustment configurations without the bulkiness of a spring, significantly improving compactness and aesthetics while preserving adaptability.
3Adaptability or versatility
If a twist or spiral electrical conductor is used to allow stretching, then the headband can be stretched for large heads or helmets, but the restoring force is very clearly perceived as discomfort
Solution Approach 1:
The patent fundamentally changes the elastic parameters of the electrical conductor by transitioning from a spring-like material with high elastic modulus to a flat cable with minimal elastic properties. This parameter change ensures the cable can stretch to accommodate large heads or helmets without generating significant restoring force that would be perceived as discomfort.
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 solution significantly reduces the perceived tension of the electrical connection, provides a compact and aesthetically pleasing design, and allows for extensive adjustment to fit various head sizes and helmets, enhancing user comfort and convenience.
Implementation Method 1
an elastic tightening tie configured to pass successively from a left fixing point of a base of the support, to then run towards a vertical conduit of a first end of the front part, exit and join an upper left passing hole of the support to form an adjustable loop there
Implementation Method 2
an electrical conductor which has two radii of curvature so as to form a 'Z'; a first movable clip positioned at the first radius of curvature to ensure sliding of the electrical conductor cord with the upper part of the elastic tightening tie
Data Source
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Figure 5
AI summary
Headlamp headband comprising: a front part comprising a headband element (210) with two terminations (210, 220) each having a vertical through hole (211, 221) for the sliding passage of an elastic tightening tie (230), a rear part comprising a support (240) and a locking lever (260), said support (240) having two fixing points and in addition two through holes to ensure the passage of the tightening tie (230) which can be locked by said locking lever (260); an electrical conductor cord (270) having two radii of curvature (271, 272) so as to form a "Z"; two movable clips (280, 290) positioned at the first and second radii of curvature (271, 272) to ensure sliding of said electrical conductor cord (270) with the upper and lower parts of said elastic tightening tie (230).