Helmet Pad Removal Mechanism Using Slant Surface Disengagement
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Solution Overview
Problem
Conventional full-face-type helmets are difficult to remove from the head due to the tight fit provided by blockish inside pads, requiring a large force, which complicates the process and can be cumbersome, especially in emergency situations.
Innovation Solution
The helmet design incorporates recess-projection fitting mechanisms with a disengaging slant surface that allows the blockish inside pads to be easily pulled out, reducing the force required for removal and simplifying the process by using a pad-pull member and a bag-like member for the cushion, enabling easy exchange and attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If blockish inside pads are attached to the head protecting cap portion by recess-projection fitting mechanisms to improve stability and fit, then the helmet becomes difficult to remove requiring large force, but this complicates the removal process especially in emergencies
Solution Approach 1:
The recess-projection fitting mechanism incorporates a disengaging slant surface that transforms the static attachment into a dynamic system. When force is applied to pull the inside pad outward, the slant surface allows the projection to slide along and disengage from the recess, enabling controlled removal. This dynamic feature allows the helmet to maintain stable attachment during normal use while facilitating easy removal when needed, resolving the contradiction between stability and ease of removal.
2Stability of the object's composition
If the lower end portion of the head protecting cap portion is narrowed to improve stability and wearing feeling, then the helmet fits more tightly, but a large force is required to remove it from the head
Solution Approach 1:
The invention extracts the removal difficulty from the overall helmet structure by specifically targeting the inside pad attachment system. By designing the recess-projection fitting mechanism with a disengaging slant surface, the system allows the inside pad to be easily pulled outward, which in turn facilitates easy removal of the entire helmet. This extraction approach resolves the contradiction by maintaining the narrow lower end portion for stability while eliminating the excessive removal force requirement through the specialized fitting mechanism.
3Reliability
If blockish inside pads are used to fit the head and face more tightly, then protection is improved, but the helmet becomes cumbersome to remove in emergency situations
Solution Approach 1:
The disengaging slant surface introduces a dynamic removal mechanism that simplifies the removal process. When force is applied to pull the inside pad outward, the slant surface guides the projection to slide and disengage from the recess in a controlled manner. This dynamic feature maintains the tight fit for protection during normal use while dramatically simplifying the removal process in emergencies, resolving the contradiction between protection reliability and removal complexity.
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
In a helmet according to this invention, a recess-projection fitting mechanism (50a - 50c) to attach a blockish inside pad (38a) on a head protecting cap portion (3) side includes a male hook (56a - 56c) or female hook (92a - 92c) on the blockish inside pad (38a, 38b) side, and a female hook (92a to 92c) or male hook (56a - 56c) on the head protecting cap portion (3). When pulling the inside pad (38a, 39b) outward from inside the head protecting cap portion (3) at least partly, a recess-projection fitting disengaging slant surface (76b, 117b) causes one hook (56a - 56c) to relatively levitate from the other hook (92a - 92c), thus relatively disengaging the male hook (56a - 56c) from the female hook (92a - 92c). This invention can provide the helmet (1) which, when worn by a head (11) of a helmed wearer (2), can be removed with a comparatively small force, and the detaching operation of which can be performed easily and reliably with a comparatively simple arrangement.