Helmet Visor Locking Mechanism Prevents Unintentional Movement
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Solution Overview
Problem
The existing visor locking mechanisms for helmets, such as those disclosed in JP-A No. 2013-28872, allow the visor to be unintentionally moved or detached due to a freely extending and contracting wire, making it difficult to properly attach or detach the visor.
Innovation Solution
A visor locking mechanism with a lock member and operation lever that anchors or releases the visor by fitting or disengaging a catch projection with a catch recess portion on the holders, preventing unintentional movement and facilitating the attachment or detachment process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a freely extending and contracting wire is used to connect the holders to the sliding knob, then the visor can be moved freely for adjustment, but the visor can be unintentionally moved or detached making it difficult to properly attach or detach
Solution Approach 1:
The lock member is provided in advance to prevent unintentional movement of the visor. The catch projection and catch recess portion are designed to engage before detaching or attaching operations, preventing the wire from causing unintended holder movement during these critical operations.
Solution Approach 2:
The lock member acts as an intermediary between the wire connection and the holder. It mediates the connection by providing a locking interface that allows controlled movement during normal operation while preventing unintentional detachment or movement during attachment/detachment operations.
2Adaptability or versatility
If the wire freely extends and contracts without a locking mechanism, then the visor can be easily adjusted, but the holders move unintentionally during attachment or detachment operations
Solution Approach 1:
The lock member is engaged in advance before attachment or detachment operations. By locking the holder position beforehand, the system prevents unintentional movement during these operations, making the attachment/detachment process easier and more reliable.
Solution Approach 2:
The lock member serves as an intermediary that controls the interaction between the wire and holder. It allows free adjustment during normal use while preventing unwanted movement during attachment/detachment, thus improving ease of operation for these critical functions.
3Device complexity
If no locking mechanism is provided, then the structure remains simple, but the work of detaching or attaching the visor becomes difficult due to unintentional holder movement
Solution Approach 1:
The locking function is segmented from the wire connection system. Instead of making the wire itself complex, a separate but simple lock member is added that provides the necessary locking function without complicating the overall wire connection mechanism.
Solution Approach 2:
The lock member is a simple intermediary component that bridges the gap between the simple wire connection and the need for reliable attachment. It adds minimal complexity while significantly improving attachment reliability.
Data Source
AI summary
A visor locking mechanism is applied to a helmet equipped with a visor. The visor is provided on an inner side of an outer shell of the helmet which has a facial opening in a front side thereof. The visor is attached to a pair of left and right holders which are pivotably attached to the outer shell. The visor is configured to close or open at least part of the facial opening. A lock member that has an operation portion and a catch portion is disposed near at least one of the pair of holders. The operation portion allows the catch portion to fit together with or disengage from a catch counterpart portion provided at the pair of holders, whereby the visor becomes anchored or released.