Hand Brake Control Assembly with Buffer Mechanism for Multi-Wheel Carts
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Solution Overview
Problem
Existing brake apparatuses for carts with three or more wheels, such as baby strollers, suffer from operational difficulties due to the brake pedal's location hindering visual sight and ease of use, and risk destruction if the brake pole is not aligned correctly with the wheel's hollow.
Innovation Solution
A brake apparatus featuring a hand brake control assembly with springy pushbuttons and a clipping pin mechanism for easy operation and automatic lock, combined with a brake pole set equipped with a buffer mechanism to prevent wheel damage during misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the brake pedal is located at the bottom of the stroller to achieve braking function, then the braking capability is provided, but visual sight is hindered and operation becomes difficult
Solution Approach 1:
The brake control is moved from a horizontal/vertical pedal position at the bottom to a hand-operated lever positioned at the rear upper side of the stroller. This spatial relocation in another dimension (from foot-operated to hand-operated, from bottom to upper position) simultaneously improves visibility and operational ease.
2Force
If the brake pole is pushed outward with great strength to ensure braking, then the braking force is sufficient, but the brake pedal or wheel is easily destructed when misaligned
Solution Approach 1:
A buffer mechanism is introduced between the brake pole and the wheel hub that activates when the brake pole is misaligned with the wheel hollow. This buffer absorbs excess force and prevents structural damage to the brake pedal or wheel, while still allowing sufficient braking force to be transmitted when properly aligned.
3Reliability
If the brake pole is not aligned with the wheel hollow, then the stroller cannot brake to a stop, but continued application of force causes destruction
Solution Approach 1:
The buffer mechanism is pre-positioned to engage when misalignment occurs, providing protective cushioning before structural damage can occur. This allows the system to handle misalignment errors gracefully without compromising either braking reliability or structural integrity.
4Device complexity
If a simple brake mechanism is used, then the structure is simple, but the brake may be accidentally released by the user
Solution Approach 1:
The brake lug automatically locks itself by clipping into the indent of the body when the brake is activated. This self-latching mechanism prevents accidental release without requiring complex additional components, maintaining relative simplicity while improving reliability.
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 provides enhanced visibility and ease of operation while preventing accidental brake release and wheel destruction by incorporating a buffer mechanism that automatically locks the brake and absorbs misalignment forces.
Implementation Method 1
The pushbutton joins a threaded element at its bottom. The threaded element joins a clipping pin at its one end. The clipping pin and the indent are clipped to each other automatically through a pull on the lug. The brake is released by pressing the springy pushbuttons on both sides of the lug, which releases the clipping pin from the indent.
Implementation Method 2
The brake pole is set up in the interior of a base, and a brake spring is put around the brake pole.
Implementation Method 3
Two brake poles, set up in both the buffer tin and the base, each has a protruded part in its middle for separation purposes. The end of the brake pole next to the protruded part is lodged in the buffer tin and is put around by a buffer spring, and a buffer space is kept with the buffer spring in the buffer tin.
Data Source
AI summary
A brake apparatus for carts with three or more wheels such as golf bag carts, baby strollers and the like includes a hand brake control assembly fixed on the cart frame and having a body and a lug in pinned connection with the body. Brake activation can be done through a pull on the lug. On the other hand, brake release is achieved by pressing springy pushbuttons on both sides of the lug to escape the clipping pin from the indent. A brake pole set, fixed on a rear wheel axle tube, is capable of offering a buffer mechanism, which avoids potential destruction to the wheel. A brake wire enables easy operation and achieves an automatic lock during braking, which substantially prevents the lapse of releasing the brake by the user.