Crib Double-Lock Assembly to Prevent Height Adjustment Misoperation
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Solution Overview
Problem
Existing cribs with height-adjustable mechanisms are prone to misoperation due to the key used for adjusting the sleeve rod being prone to misoperation, posing a safety hazard.
Innovation Solution
A crib with a double-lock assembly comprising a pulling and pressing portion, where the pulling portion blocks the pressing portion when not pulled, and a clamping mechanism that uses springs to ensure secure adjustment of the sleeve rod height, preventing direct misoperation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single key is used to drive the sleeve rod up and down for height adjustment, then the operation is simple, but misoperation is prone and safety hazards occur
Solution Approach 1:
The single key operation is segmented into two distinct operations: a pulling portion for releasing the lock and a pressing portion for clamping. This segmentation prevents accidental activation by requiring intentional two-step operation, thereby improving safety while maintaining ease of use.
Solution Approach 2:
The pulling portion must be pulled upward first as a preliminary action to enable the pressing portion to function. This preliminary action ensures that the clamping mechanism is intentionally activated only after the user has deliberately initiated the height adjustment process, preventing misoperation.
2Reliability
If the pulling portion blocks the pressing portion when not pulled upward, then misoperation is prevented, but the device complexity increases
Solution Approach 1:
The pulling portion and pressing portion are merged into a single integrated key component that performs both functions. This merging reduces the need for separate mechanisms while maintaining the safety function, thereby limiting the increase in device complexity.
Solution Approach 2:
Instead of using a traditional lock that requires turning or complex manipulation, the design inverts the approach by using a simple pull-up motion to block the pressing portion. This inversion simplifies the blocking mechanism while maintaining reliability.
3Reliability
If the clamping portion passes through the mounting portion and sleeve rod to be clamped into the clamping slot, then the locking is secure, but the manufacturing precision requirements increase
Solution Approach 1:
The spring automatically pushes the clamping portion into the clamping slot without requiring precise manual alignment. The spring's elastic force ensures the clamping portion self-adjusts to engage with the slot, reducing manufacturing precision requirements while maintaining secure locking.
Solution Approach 2:
The spring mechanism changes the positional parameter of the clamping portion dynamically, allowing it to move into the clamping slot under elastic force. This parameter change compensates for minor manufacturing tolerances and ensures reliable engagement.
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 double-lock assembly prevents misoperation during height adjustment, enhancing operational safety and allowing the crib to function as both a standard crib and a rocking cradle.
Implementation Method 1
a spring may be provided between the spring mounting seat and an inner top surface of the mounting slot
Data Source
AI summary
A crib includes a left support portion, a right support portion and a sleeping basket. Each of the left and right support portions includes a base, a support rod and a sleeve rod. The support rod is provided with a bottom portion connected to a top portion of the base and an upper portion nested in a lower portion of the sleeve rod. The sleeping basket is provided between the sleeve rod of the left support portion and the sleeve rod of the right support portion. An outer side of a bottom portion of the sleeve rod is provided with a double-lock assembly. The double-lock assembly includes a mounting portion, a pulling portion and a pressing portion. The mounting portion is connected to the sleeve rod. The pulling portion and the pressing portion are arranged on the mounting portion, and the pulling portion is located above the pressing portion.