Child Seat Support Leg with Rotational Lock and Adjustable Length
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Solution Overview
Problem
Conventional child seat support leg devices face difficulties in smooth operation, length adjustment, and stability due to thin plate materials and complex mechanisms, leading to potential failure under high inertial forces during vehicle deceleration or collisions.
Innovation Solution
A child seat design featuring a U-shaped frame body with a rotational support and lock mechanism, allowing the support leg to be easily raised, collapsed, and adjusted in length using a one-handed operation, with a leg support that includes a biasing member to secure the leg portion at a predetermined length, ensuring stability on the vehicle body floor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a thin plate support leg and support arm are coupled in an L shape to form a child seat supporting device, then the device structure is simple and easy to manufacture, but the structure cannot resist the high inertial force during sudden deceleration or collision
Solution Approach 1:
The support arm is constructed as a composite structure combining a leg support made of high-strength material (such as metal pipe) and a support arm made of different material properties, creating an L-shaped composite supporting member that resists high inertial forces during collision while maintaining manufacturability
Solution Approach 2:
The supporting structure is divided into distinct functional segments: a leg support portion that provides vertical support and an arm support portion that extends horizontally, coupled together to form an L-shaped configuration that distributes and resists collision forces more effectively than a single thin plate structure
2Adaptability or versatility
If an adjustment pin serving as a stopper is inserted into holes formed in the pipe support leg at predetermined intervals to adjust support leg length, then the support leg can be adjusted to different positions, but a clearance is generated between pipe parts of a double structure, causing rattling and abnormal noise
Solution Approach 1:
A cushioning member (such as a rubber or elastic element) is introduced as an intermediary component between the adjustment pin and the pipe support leg, filling the clearance and preventing direct metal-to-metal contact that causes rattling and abnormal noise during adjustment and operation
Solution Approach 2:
The cushioning member is pre-installed in the adjustment mechanism to eliminate gaps and provide damping before any rattling or noise can occur, ensuring smooth operation and quiet performance throughout the adjustable range of the support leg
3Adaptability or versatility
If the support leg is collapsed and contained in the lower surface of the base, then the support leg can be stored when not in use, but it is difficult to smoothly perform operations while holding the child seat
Solution Approach 1:
The support leg is designed to be easily extracted or detached from its collapsed position in the lower surface of the base, allowing quick deployment when needed without requiring complex manipulation or two-handed operations, thus maintaining ease of use while providing storability
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
Facilitates effortless operation and enhances safety by stabilizing the child seat during sudden deceleration or collisions, preventing forward rotation and ensuring secure attachment to the vehicle seat.
Implementation Method 1
a rotational support (20) attached to a site exposed at the base front end (10a) of the frame body (12) to be rotatable around the frame body (12)
Implementation Method 2
containing a lock mechanism capable of being locked and unlocked at a predetermined angle with respect to the frame body (12)
Implementation Method 3
a leg support (31) capable of adjusting and holding a leg portion coupled to the rotational support (20) at a predetermined length
Implementation Method 4
the load acting on the child seat during the sudden deceleration of the vehicle or the like is transmitted from the support arm to the support leg and finally received by the vehicle body floor
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
A child seat includes a main frame (12) which is accommodated in a base (10) supporting a child seat main body, which stiffens the base (10), and which is fixed and disposed in the base (10) so that a front end is exposed from a notch formed in the base (10); a rotational support (20) attached to a site exposed at the base front end (10a) of the frame body (12) to be rotatable around the frame body (12), and containing a lock mechanism capable of being locked and unlocked at a predetermined angle with respect to the frame body (12); and a support leg (30) including a leg support (31) capable of adjusting and holding a leg portion coupled to the rotational support (20) at a predetermined length.