Collapsible Exercise Machine Pivot Locking Mechanism
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Solution Overview
Problem
Existing collapsible exercise machines lack support for the pivotally connecting portion during the extending/collapsing process, leading to instability and potential separation of the stationary and moving members.
Innovation Solution
A collapsible exercise machine design featuring a stationary base with a pivotally connecting portion and supporting frame, including a pin with an elastic restoring member to lock the moving member in extended or collapsed positions, ensuring stability and preventing separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the moving member is pivotally connected to the stationary base without additional support, then the structure remains simple, but the pivotally connecting portion becomes unsupported and insecure during extending/collapsing
Solution Approach 1:
A supporting frame is introduced as an intermediary component between the stationary base and the moving member. The supporting frame includes a bearing portion that supports the pivotally connecting portion during the extending and collapsing process, preventing the stationary base and moving member from falling apart while maintaining structural simplicity
2Reliability
If the pin is always engaged in positioning holes, then the moving member is locked in position, but the moving member cannot pivot between extended and collapsed positions
Solution Approach 1:
The pin is designed to be movable between different positions rather than fixed. It can be displaced between a first position (where it allows pivoting) and a second position (where it engages positioning holes to lock the moving member). This dynamic design enables both pivoting capability and position locking functionality
Solution Approach 2:
The elastic restoring member automatically returns the pin to its initial position after displacement. When the user displaces the pin to the second position for locking, the elastic restoring member ensures the pin returns to the first position after release, enabling self-service operation without manual intervention
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 provides robust support and locking mechanisms, preventing the stationary and moving members from falling apart during pivoting, ensuring secure operation in both extended and collapsed states.
Implementation Method 1
The pin includes a receiving sleeve, an elastic restoring member, and an inserting member. The receiving sleeve is fixedly connected to the moving member. Both the elastic restoring member and the inserting member are received in the receiving sleeve. The two ends of the elastic restoring member are pressed against the inserting member and the receiving sleeve respectively such that the pin is moved to correspond to the second position.
Data Source
AI summary
A collapsible exercise machine includes a stationary base, a moving member, and a supporting frame. The stationary base includes a pivotally connecting portion and a first supporting portion. The moving member is pivotally connected to the pivotally connecting portion of the stationary base, can be pivoted to an extended position and a collapsed position with respect to the stationary base, and includes a second supporting portion. The supporting frame includes a third supporting portion, is fixedly connected to the stationary base, and lies under the pivotally connecting portion. When in the extended position, the stationary base and the moving member are supported by the third supporting portion as well as the first supporting portion and the second supporting portion.