Airbag Attachment Member Prevents Rotational Misalignment
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Solution Overview
Problem
Existing head protection airbag devices face challenges in accurately positioning the folded airbag during mounting due to potential misalignment caused by the use of adhesive tape, which can lead to incorrect placement and deployment.
Innovation Solution
A head protection airbag device featuring an attachment member with a neck part and engaging head part that is inserted into a corresponding hole in the airbag and case, preventing rotation and ensuring precise alignment, allowing the airbag to be securely attached without positional misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If adhesive tape is used to bond the folded airbag to the case, then the airbag can be attached to the mounting part, but the airbag may be positionally misaligned with rotation in the circumferential direction
Solution Approach 1:
The patent introduces an attachment member as an intermediary component between the airbag and the case. This attachment member includes a positioning protrusion that fits into a positioning groove, serving as a mediator to transfer and maintain the correct positional relationship from the mold during manufacturing to the final assembled state, thereby preventing rotational misalignment that would occur with direct adhesive bonding
Solution Approach 2:
The positioning protrusion and positioning groove are pre-formed during the molding process of the airbag and case respectively. This preliminary action establishes the correct geometric relationship between components before assembly, ensuring that when the airbag is attached to the case, it cannot rotate or misalign circumferentially, thus solving the positioning accuracy problem while maintaining ease of manufacture
2Ease of operation
If the airbag is positioned using insertion of an attachment piece into a through-hole and adhesion of adhesive tape, then the airbag can be mounted at a predetermined posture, but there is room for improvement in correctly positioning and arranging the airbag
Solution Approach 1:
The attachment member serves as an intermediary that combines both the attachment function (through engagement with the case) and the positioning function (through the positioning protrusion and groove). This single intermediary component replaces the two-step process of insertion plus adhesive bonding, maintaining ease of operation while eliminating positioning errors through the geometric constraint of the protrusion-groove interface
Solution Approach 2:
The patent merges the attachment function and the positioning function into a single integrated attachment member. The positioning protrusion and the engagement features are combined in one component, allowing simultaneous achievement of secure mounting and precise positioning, thereby improving positioning accuracy without compromising ease of operation
Data Source
AI summary
Ahead protection airbag device includes an airbag. The airbag includes: a hag main body; and an attachment member configured to attach the bag main body to a predetermined attachment part. The attachment member includes: an attachment substrate; a neck part protruding from the attachment substrate; and an engaging head part arranged with being bulged at a tip end of the neck part. The bag main body has an insertion hole in which the neck part is inserted so as to enable the engaging head part to protrude from an outer surface-side of a folded body of the bag main body. The attachment substrate is arranged at a backside of a peripheral edge of the insertion hole so that the attachment member is attached to the bag main body.