Child Car Seat Belt Lock Switching for Automatic Fit Adjustment
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Solution Overview
Problem
Conventional car seat belts are cumbersome to adjust manually, failing to meet the needs of convenience and safety for children of different ages and body shapes.
Innovation Solution
An automatic belt adjustment apparatus featuring a fixing buckle, belt buckle, belt retractor, and position switching member that allows for automatic adjustment of the belt length by selectively limiting the belt retractor's retraction, using a locking assembly that switches between positions to enable or prevent automatic retraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual belt adjustment is used, then the structure is simple, but the ease of operation deteriorates
Solution Approach 1:
The belt retractor automatically adjusts the belt length by retracting and extending the belt based on the child's position and movement, eliminating the need for manual adjustment operations. The locking assembly automatically locks or unlocks based on the position switching member's position, providing self-service functionality.
Solution Approach 2:
The system transitions from static manual adjustment to dynamic automatic adjustment. The belt retractor can dynamically extend and retract the belt in real-time, and the locking assembly dynamically switches between locked and unlocked states based on the position switching member's position, enabling adaptive belt adjustment.
2Ease of operation
If automatic belt retraction is always enabled, then the ease of operation improves, but the reliability deteriorates due to inability to maintain fixed position
Solution Approach 1:
The locking assembly dynamically switches between locked and unlocked states based on the position switching member's position. When the position switching member is in the first position, the locking assembly locks to maintain fixed position for reliability. When in the second position, the locking assembly unlocks to enable automatic retraction for ease of operation.
Solution Approach 2:
The locking function is selectively applied at different operational states. The locking assembly provides localized locking when needed (first position) and releases when automatic adjustment is needed (second position), creating different functional qualities in different operational contexts.
3Reliability
If locking assembly prevents retraction, then the belt position stability improves, but the ease of operation worsens due to manual intervention needed
Solution Approach 1:
The system dynamically controls the locking state based on the position switching member's position. When the position switching member is in the first position, the locking assembly is engaged to provide stable belt position. When in the second position, the locking assembly disengages to enable automatic retraction, balancing stability and adjustability.
Data Source
AI summary
An automatic belt adjustment apparatus includes a fixing buckle, a belt buckle, a belt retractor, and a position switching member. The belt buckle is configured to be buckled with the fixing buckle. The belt retractor is connected to the other end of the belt. The belt retractor includes a locking assembly configured to selectively limit the belt retractor from automatically retracting the belt. The position switching member is movably disposed on at least one of the fixing buckle and the base, and configured to selectively drive the locking assembly to switch between a first position and a second position. When the position switching member drives the locking assembly to switch to the second position, the locking assembly is refrained from limiting the belt retractor from automatically retracting the belt.