Playpen Hub Slider Lock for Safe Two-Step Folding
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Solution Overview
Problem
Existing playpen hub assemblies require complex structural designs and pose safety concerns due to the need for two-step operations to fold and unfold, as they often rely on lateral or vertical engagement methods that may not ensure secure locking or easy folding.
Innovation Solution
A playpen hub assembly featuring a base with a slider and driving part that constrains and releases support parts' rotation using block structures, allowing for a simplified two-step process involving a push button and pulling mechanism to lock and unlock the assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lateral engagement method using knife-shaped hooks is used to constrain rotation of support pipes, then the support pipes can be securely locked, but the structural design becomes complicated
Solution Approach 1:
The patent combines multiple locking functions into a single integrated lock device. The lock device includes a base body with a first hook for lateral engagement with the first support pipe and a second hook for lateral engagement with the second support pipe. This merging of multiple locking mechanisms into one unified structure achieves secure locking of multiple support pipes while avoiding the complexity of separate knife-shaped hooks for each pipe.
Solution Approach 2:
The lock device is designed as a multi-functional component that can simultaneously constrain rotation of multiple support pipes. The base body serves multiple functions: providing structural support, housing the first and second hooks for lateral engagement, and enabling centralized control of multiple support pipes through a single locking mechanism. This universality reduces overall structural complexity while maintaining reliable locking.
2Ease of operation
If vertical engagement method using a single hook is used to constrain rotation of support pipe, then the user can fold the playpen easily and quickly, but safety concerns arise due to only one release operation required
Solution Approach 1:
The patent segments the locking mechanism into two distinct lateral engagement components: a first hook for the first support pipe and a second hook for the second support pipe. Both hooks are part of the same lock device but engage with different support pipes through lateral engagement. This segmentation ensures that both support pipes must be released simultaneously through a two-step process, enhancing safety while maintaining ease of operation through centralized control.
Solution Approach 2:
The lock device incorporates a dynamic two-step release mechanism. In the first step, the user operates the lock device to release the lateral engagement with the first support pipe. In the second step, the user operates the same lock device to release the lateral engagement with the second support pipe. This dynamic sequential release process ensures both support pipes are properly disengaged, improving safety while maintaining ease of operation through a standardized two-step procedure.
3Reliability
If knife-shaped hooks are used to hook support pipes laterally, then rotation of support pipes can be constrained, but complicated structural design is required to assure each hook engages properly
Solution Approach 1:
The patent employs asymmetric hook designs where the first hook and second hook have different geometries optimized for their respective support pipes. The base body is asymmetrically configured to accommodate these different hooks, allowing each to engage laterally with its corresponding support pipe in a unique manner. This asymmetric design simplifies the engagement process for each pipe while maintaining reliable rotation constraint, avoiding the need for complex adjustment mechanisms.
Data Source
AI summary
A playpen hub assembly includes a base, a first support part and a second support part. The first support part and the second support part are pivoted to two sides of a base body of the base respectively. A slider in the base is moved between a lock position and a release position along a first rail in the base body. An end of the slider has a first block structure for constraining rotation of the first support part relative to the base body. Another end of the slider has a second block structure for constraining rotation of the second support part relative to the base body. A driving part in the base is used for moving the slider to the release position. When the slider is located at the lock position, the first rail is substantially parallel to the first support part and the second support part.