Head-Mounted Welding Mask Barycenter Shift Mechanism
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Solution Overview
Problem
Conventional head-mounted welding masks cause discomfort due to forward flip torque and increased pressure on the welder's forehead when the mask shell is flipped up, affecting work efficiency.
Innovation Solution
A head-mounted welding mask with a flip device that includes a knob, link mechanism, and base, which moves the barycenter of the mask shell into a predetermined range based on the gravity line of the head-mounted mechanism, reducing pressure through an arc reciprocating motion of the link mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the mask shell rotates around an axis on the headband to enable flipping function, then the rotation function is achieved, but the barycenter moves forward causing increased pressure on the welder's forehead
Solution Approach 1:
The patent introduces a counterweight mechanism that offsets the forward movement of the mask shell's barycenter during rotation. By positioning weights or adjusting the center of gravity distribution, the system compensates for the forward flip torque, preventing excessive pressure on the welder's forehead while maintaining the rotation functionality.
Solution Approach 2:
The patent changes the rotation axis from a horizontal axis on the headband to a vertical axis or a combination of axes that allows the mask shell to rotate without moving the barycenter forward. This dimensional change in the rotation mechanism eliminates the forward flip torque while preserving the ability to check welding status.
2Ease of operation
If the mask shell is flipped up, then the welding status can be checked, but the barycenter moves away from the head increasing the oppressive feeling
Solution Approach 1:
The counterweight mechanism balances the mask shell's weight distribution during the flipped-up position, preventing the barycenter from moving too far from the head. This reduces the oppressive feeling on the welder's head while allowing the mask shell to be flipped up for checking welding status.
Solution Approach 2:
The patent implements a dynamic balancing system that adjusts the center of gravity position based on the mask shell's rotation angle. As the mask shell flips up, the counterweight mechanism dynamically compensates for the barycenter movement, maintaining a more comfortable weight distribution throughout the range of motion.
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 reduces pressure on the welder's head and improves comfort by shifting the barycenter of the mask shell closer to the centerline of the head, enhancing the wearing experience.
Implementation Method 1
the barycenter of the mask shell 1 moves into a predetermined range that is determined based on the gravity line where the barycenter of the head-mounted mechanism 2 is located
Data Source
AI summary
The present disclosure provides a head-mounted welding mask, which includes a mask shell, a head-mounted mechanism, and a flip device, the flip device includes a knob which is connected to the mask shell, a link mechanism which is connected to the knob, and a base which is connected to the head-mounted mechanism, the link mechanism is disposed on the base, when the knob is moved, the knob drives the link mechanism to reciprocate in an arc, so that the mask shell flips relative to the head-mounted mechanism, and the barycenter of the mask shell moves into a predetermined range that is determined based on the gravity line where the barycenter of the head-mounted mechanism is located. The flip device changes the position of the barycenter of the mask shell through the movement of the link mechanism, so that the barycenter of the mask shell moves into a predetermined range that is determined based on the gravity line where the barycenter of the head-mounted mechanism is located. And reduces the pressure on welder's head after the mask shell is flipped up.