Stroller Joint Connecting Structure That Prevents Bolt Loosening
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Solution Overview
Problem
Current foldable strollers face issues with joint connections that allow rotational torque, leading to loosening of bolts and nuts, and lack a compact locking mechanism that conceals these components, affecting user experience and structural integrity.
Innovation Solution
A connecting structure with a spacer member and locking mechanism that prevents rotational torque by spacing the joint components apart, using a screw-like member fixed to one joint and a spacer that cannot rotate, ensuring secure and concealed joint connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional bolt and nut connection is used to connect joint components, then the joint can be assembled, but the rotational torque causes the bolts and nuts to loosen over time
Solution Approach 1:
The patent extracts the harmful rotational torque transmission path by spacing the connecting member away from the second joint component. The spacer member creates a gap that prevents the connecting member from contacting the second joint component, thereby eliminating the torque that would otherwise cause loosening of the bolt-nut connection.
Solution Approach 2:
The spacer member acts as an intermediary element between the connecting member and the second joint component. It introduces a deliberate gap that mediates the interaction, preventing direct contact and the subsequent harmful rotational torque while still allowing the joint to function.
2Volume of moving object
If the connecting member is positioned close to the second joint component for compactness, then the structure is more compact, but rotational torque is generated causing loosening
Solution Approach 1:
The spacer member serves as an intermediary that deliberately creates spacing between the connecting member and the second joint component. This spacer is a non-rotating element that prevents torque transmission while maintaining a controlled, compact arrangement of the joint components.
3Device complexity
If the connecting member contacts the second joint component directly, then the locking mechanism is simpler, but the appearance is messy and the connection is less secure
Solution Approach 1:
The patent removes the direct contact between the connecting member and the second joint component by introducing a spacer. This extraction of the harmful contact point eliminates the messy appearance and insecure connection while the overall structure remains relatively simple.
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3B
AI summary
A connecting structure is provided, including: a first joint component and a second joint component pivotable relative to each other around an axial direction; and a connecting member extending through the second joint component in the axial direction and inserted into and screwedly connected to the first joint component to restrict a separation of the first joint component from the second joint component in a direction parallel to the axial direction. The connecting member is spaced apart from the second joint component.