Stroller Brake Linkage That Holds Lock Engagement Under Load
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Solution Overview
Problem
Existing wheeled childcare devices, such as strollers, face issues with maintaining a reliable braking state due to the movement of lock members when a load is applied, leading to potential malfunction of the braking mechanism.
Innovation Solution
A wheeled childcare device with a brake mechanism that includes a pair of lock members, an operating member, and a connecting member, where the lock members are configured to displace between engaged and disengaged positions, and a connecting member that ensures the braking operation is not interfered with by the pivoting motion of arm members, using a guide portion and biasing mechanisms to maintain the braking state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a brake mechanism with lock members connected by wires to an operating member is used, then simultaneous braking of both wheels can be achieved, but the braking state cannot be reliably maintained when a load is applied due to movement of lock members
Solution Approach 1:
The brake mechanism allows the arm member to pivot dynamically in response to applied loads, while the lock members are guided to move along a straight line. This dynamic adaptation enables the brake to maintain reliable braking state under varying load conditions while preserving ease of simultaneous operation.
Solution Approach 2:
A connecting member serves as an intermediary between the operating member and the lock members. This connecting member transmits the braking force reliably while accommodating the pivoting motion of the arm member, ensuring that the braking state is maintained even when loads cause arm member movement.
2Ease of operation
If the lock members are connected directly to the operating member via wires, then the braking mechanism can be operated, but the pivoting motion of arm members interferes with the braking operation
Solution Approach 1:
The connecting member acts as an intermediary that decouples the direct connection between the operating member and lock members. It accommodates the pivoting motion of the arm member while still transmitting the braking force effectively, thus simplifying the overall mechanism by eliminating the need for complex wire routing and rotation joints.
Solution Approach 2:
The pivoting motion capability is extracted from the braking mechanism itself and handled separately by the connecting member. This separation allows the brake mechanism to focus on providing reliable braking while the connecting member independently manages the accommodation of arm member pivoting motion.
3Adaptability or versatility
If the lock members are allowed to move freely with arm member pivoting, then the mechanism can adapt to load changes, but the braking state becomes unreliable
Solution Approach 1:
The arm member is designed to pivot dynamically to adapt to load changes, while the lock members are constrained to move along a straight line guided by the guide portion. This dynamic configuration allows the brake to adapt to varying loads while maintaining consistent and reliable braking state through the guided linear motion of the lock members.
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 solution effectively maintains a reliable braking state by preventing interference from the pivoting motion of arm members, ensuring consistent braking performance even under load conditions.
Implementation Method 1
an elastic member provided between the leg and the arm member
Data Source
AI summary
A wheeled childcare device is provided that can reliably maintain a braking state. The wheeled childcare device includes: a body frame; a pair of arm members each having an upper end pivotally held at a lower end of a corresponding one of a pair of legs via a corresponding one of a pair of pivot shafts; a pair of wheels each rotatably supported at a lower end of a corresponding one of the arm members via a corresponding one of a pair of axles; and a brake mechanism configured to stop rotation of the wheels and including a pair of lock members, an operating member, and a connecting member connecting the operating member with the lock members. The brake mechanism is configured to perform a braking operation and maintain a braking state without being interfered with by a pivoting motion of the arm members.