Hardhat Suspension Locking Tab With Spring-Biased Hanger
Solution Overview
Problem
Existing headgear suspensions often accidentally pop out of hardhats due to inadequate securing mechanisms, making them difficult to connect, disconnect, and reconnect, and may not provide comfort or aesthetic appeal.
Innovation Solution
A suspension locking tab system with hangers that securely engage with mounts on the hardhat shell using a hook, latching surface, and lever arm, allowing easy engagement and disengagement without tools, and featuring a spring-biased pre-load for improved fit and comfort, while maintaining aesthetic appeal by avoiding bumps on the exterior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional suspension securing mechanism is used, then the suspension may be securely attached to the hardhat, but it is difficult to disconnect and reconnect the suspension
Solution Approach 1:
The suspension system is divided into separate components: the hardhat shell with integrated mounts, the suspension band, and removable hangers. This segmentation allows the suspension to be easily disconnected and reconnected by simply removing and reattaching the hangers, while each component maintains its structural integrity and securing function.
Solution Approach 2:
The hanger incorporates a flexible lever arm that can be manually deflected to disengage from the mount, allowing dynamic operation. The lever arm can be easily pressed to release the suspension, then returns to its secured position, enabling simple disconnect and reconnect operations while maintaining reliable attachment during normal use.
2Reliability
If a secure locking mechanism is used, then the suspension stays attached during impact loads, but it may accidentally pop out due to inadequate securing
Solution Approach 1:
The hanger uses a spring-biased lever arm that maintains constant contact pressure against the mount, providing dynamic securing force that resists impact loads. The spring mechanism automatically adjusts to maintain engagement pressure, preventing accidental popping out while allowing intentional disengagement when the lever arm is manually deflected.
Solution Approach 2:
The spring bias in the lever arm creates a preliminary securing force that actively prevents the hanger from disengaging under normal conditions including impact loads. This preliminary anti-action counteracts any forces that might cause accidental popping out, while the design still allows easy manual override for intentional removal.
3Reliability
If mounts are formed on the hardhat shell, then the suspension can be securely attached, but the exterior surface may have bumps affecting aesthetics and cleanability
Solution Approach 1:
The mount is nested within the hardhat shell interior, with the mounting platform and ledge surface positioned inside the shell cavity. This nesting arrangement allows the mount to protrude inward without creating external bumps, maintaining the uniform convex exterior surface while providing secure mounting capability for the hangers.
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 enables easy and secure attachment and detachment of the suspension to the hardhat, prevents accidental popping out, enhances user comfort, and maintains a cleanable and aesthetically pleasing exterior design.
Implementation Method 1
the latching surface of the respective hanger being in frictional engagement with the respective ledge surface of the mount
Implementation Method 2
provide a spring-biased pre-load on the tab to push the headband to fit the head of a user
Data Source
AI summary
A hardhat shell has a suspension that is secured to the shell by a hanger. The suspension has a horizontal band portion for extending around a user's head, and the suspension is positioned within a hardhat shell. At least one hanger is connected to the suspension for securing the suspension to the shell. Each hanger has a hook at a first end of the hanger, a latching surface located towards the middle of the hanger, and a lever arm at a second end of the hanger. At least one mount is formed on the inner surface of the shell. Each hanger is configured to securely engage a respective one of the mounts, with the latching surface of the respective hanger being in frictional engagement with the respective ledge surface of the mount. By manually pivoting the hanger, a user can cause the latching surface to disengage from the ledge surface.