Goggle Strap Bracket Connection Offset Pulling Force
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Solution Overview
Problem
Existing goggles and face masks with straps often break or crack due to backward pulling forces when worn, as the strap's connection mechanism is not adequately designed to distribute or absorb such forces effectively.
Innovation Solution
A combined goggle and face mask design featuring a goggle body with recessed receiving portions and oblique sides, a strap with brackets and engaging blocks, and retaining members with elastic retraction and stop flanges, which distribute the pulling force and prevent breakage or cracking by engaging blocks and stop flanges, allowing for multi-step slide positioning and elasticity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple retaining block is used to connect the strap to the goggle, then the device complexity is reduced, but the strength and reliability of the connection are insufficient, causing breakage under pulling force
Solution Approach 1:
The connection structure is divided into multiple functional components: engaging blocks for initial attachment, oblique sides for force distribution, curved corners for stress relief, and retaining members for locking. This segmentation allows each component to address specific aspects of the contradiction, achieving both simplicity and strength.
Solution Approach 2:
The oblique sides and curved corners are designed in advance to distribute and relieve stress before it can concentrate and cause failure. The oblique sides redirect pulling forces away from critical joints, while curved corners prevent stress concentration, cushioning the connection against breaking under load.
2Strength
If a rigid connection structure is used to prevent deformation, then the strength is improved, but the ability to absorb pulling force through elasticity is reduced
Solution Approach 1:
The connection structure transitions from a static rigid design to a dynamic system that can adapt to applied forces. The oblique sides and curved corners allow controlled deformation and movement, enabling the structure to absorb pulling forces through elastic deformation while maintaining overall strength and integrity.
3Ease of operation
If the strap connection allows movement for comfort, then the ease of operation is improved, but the reliability of the connection under pulling force deteriorates
Solution Approach 1:
The retaining members with engaging protrusions are designed to lock the strap in position after adjustment, preventing disengagement under pulling force. This preliminary locking action maintains reliability while allowing the strap to be adjusted for comfort during operation.
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 design effectively offsets backward pulling forces, preventing the strap and brackets from breaking and ensuring the overall integrity of the goggle and face mask, while allowing for adjustable opening angles of the shield through flexible slide sections.
Implementation Method 1
Each retaining member includes a pair of raised retaining portions that can be elastically retracted and extended. The retaining portions are inserted and secured in the retaining hole.
Data Source
AI summary
A combined goggle and face mask includes a goggle body, a strap, a shield, and two retaining members. Either side of the goggle body is recessed with a receiving portion. The goggle body is provided with a lens. Either end of the strap is provided with a bracket to be coupled to the receiving portion. The bracket is supported by the receiving portion. The shield is coupled to the google body. The retaining member is coupled to the bracket. Because the bracket is received in the receiving portion, the bracket can be supported by the receiving portion, so as to offset the pulling force. First edges that are oblique edges and second edges each in the form of a curved corner of the bracket are supported by two oblique sides and two bent sides each in the form of a curved corner of the receiving portion.