Bouncing Cradle Backrest Locking for Stable Inclination Adjustment
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Solution Overview
Problem
Existing bouncing cradles lack easy and safe reconfiguration between inclination positions, fail to maintain set angles during backrest lifting, and do not automatically assume a stable inclination position after conversion from a transportation state to a usage state, while also lacking a secure locking mechanism for conversion between states.
Innovation Solution
A bouncing cradle design featuring a base frame, backrest, and adjustable pivot mountings with an adjustment fitting having recesses at different distances for setting various inclination angles, combined with a locking mechanism that ensures the backrest retains its position and can be easily converted between transportation and usage states, including a mechanism for automatic stable inclination and secure locking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the backrest is made adjustable with multiple inclination positions, then the adaptability and versatility of the bouncing cradle is improved, but the device complexity increases due to additional adjustment mechanisms
Solution Approach 1:
The adjustment mechanism is segmented into discrete components: an adjustment lever with multiple recesses (position indicators), a bar with corresponding engagement points, and a locking mechanism. This segmentation allows the backrest to assume specific predetermined inclination positions while keeping the adjustment structure relatively simple and manageable.
Solution Approach 2:
The adjustment mechanism incorporates a self-locking feature where the bar automatically engages with one of the recesses on the adjustment lever when the backrest is positioned at a desired inclination. This self-service mechanism eliminates the need for complex manual locking devices, allowing the system to maintain its position automatically once adjusted.
2Reliability
If a locking mechanism is added to secure the backrest position, then the reliability and safety are improved, but the device complexity increases
Solution Approach 1:
The locking mechanism operates on a self-service principle where the bar automatically locks into engagement with the recesses on the adjustment lever through its own weight and the gravitational force acting on the backrest. The design eliminates the need for separate locking devices, buttons, or complex mechanical interlocks, thereby maintaining reliability while minimizing added complexity.
Solution Approach 2:
The engagement between the bar and the recesses is designed with inherent tolerance and clearance that accommodates manufacturing variations and wear over time. The recesses are shaped to guide the bar into proper engagement, ensuring reliable locking without requiring precision adjustment or complex alignment mechanisms.
3Ease of operation
If the adjustment mechanism allows easy reconfiguration, then the ease of operation is improved, but the reliability may worsen due to potential instability during adjustment
Solution Approach 1:
The adjustment lever is designed to be movable and easily manipulatable, allowing the user to quickly skip through different inclination positions by simply moving the lever to the desired recess. This rapid adjustment capability improves ease of operation while the automatic locking feature ensures stability is maintained once the position is selected.
Solution Approach 2:
The bar automatically engages with the recesses on the adjustment lever through its own weight and the gravitational force acting on the backrest. This self-service mechanism eliminates the need for complex manual locking devices, allowing the system to maintain its position automatically once adjusted.
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
Enables easy, safe, and secure reconfiguration of the bouncing cradle between different inclination positions, maintains set angles during backrest lifting, and automatically assumes a stable inclination position upon load, ensuring safety and convenience in use and transportation.
Implementation Method 1
The pivot mountings are designed to allow smooth rotation while maintaining position when loaded
Implementation Method 2
each recess has a bottom part that supportingly receives the bar
Implementation Method 3
The recesses are situated such that each recess has a bottom part that supportingly receives the bar, and a mouth portion that, obliquely downward and toward the first pivot mounting, mouths into the opening
Implementation Method 4
The recesses are situated such that each recess has a mouth portion that, obliquely downward and toward the first pivot mounting, mouths into the opening
Data Source
AI summary
A bouncing cradle comprising a base frame (10), a backrest (20), a first pivot mounting (12) arranged for the backrest (20) and carried by the base frame (10), an arm (22) fixedly connected to the backrest (20) and situated under the backrest (20) as well as at a distance from the first pivot mounting (12), the arm being, via a second pivot mounting (22, 23), connected to an adjustment fitting (40), the adjustment fitting (40) having at least two recesses (51, 52) that are situated at different distances from the second pivot mounting (22, 23) and that can receive a bar (14) carried by the base frame (10) and situated at a distance from the first pivot mounting, for setting different angles of inclination of the backrest (20) in relation to the base frame (10), the bar (14), the arm (22) and the first and the second mounting (12, 22) being axially parallel and the base frame (10) being intended to stand on a substantially horizontal underlay. The adjustment fitting (40) has a through elongate opening (60) having a side (61), which is turned obliquely downward and facing the first pivot mounting and in which the recesses (51, 52, 53) are situated. Each recess (51-53) has a bottom part (62) that supportingly receives the bar (14), and a mouth portion (63) that, obliquely downward and toward the first pivot mounting, mouths into the opening (60).