Power Mechanism for Child Vehicle Mode Switching
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Solution Overview
Problem
Motorized child vehicles face limitations due to heavy and cumbersome batteries, short battery life, long recharge times, and significant motor drag or resistance after battery depletion, leading to reduced playtime and usability.
Innovation Solution
A child vehicle with a power mechanism that includes a motor, a manually-actuated propulsion switch, and an engagement mechanism allowing the vehicle to operate in two modes: a motor-driven mode and a mode where the wheel rotates freely without motor resistance, enabling seamless transition from motor-powered to traditional pedal/foot-powered operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the motor remains engaged with the drive train after battery depletion, then the vehicle structure remains simple, but the vehicle experiences significant motor drag or resistance making it difficult to move under pedal power or foot power
Solution Approach 1:
The patent implements a dynamic engagement mechanism that automatically transitions the motor connection state based on power availability. The mechanism includes spring-loaded components that maintain motor engagement when powered but automatically disengage when the battery depletes, allowing the driven wheel to rotate freely without motor resistance. This dynamic behavior resolves the contradiction by adapting the system state to operational conditions.
Solution Approach 2:
The power mechanism is segmented into separable components: the motor, the engagement mechanism with magnetic members, and the driven wheel. This segmentation allows the motor to be decoupled from the drive train when needed, eliminating drag while maintaining structural integrity. The modular design enables independent optimization of each component.
2Speed
If a motorized system is added to a child vehicle, then propulsion capability is improved, but the vehicle becomes heavy making carrying difficult
Solution Approach 1:
The system dynamically adjusts its mass characteristics by disengaging the motor from the drive train when not in use. The spring-loaded engagement mechanism allows the motor to be physically separated from the driven wheel, effectively reducing the rotating mass that needs to be accelerated during manual operation.
3Power
If the battery is heavy and cumbersome, then power source capacity is sufficient, but battery removal and recharging requires several disassembly steps and lifting operations
Solution Approach 1:
The engagement mechanism incorporates spring-loaded components that automatically detect and respond to battery presence or absence. When the battery is removed, the springs automatically disengage the motor connection, eliminating the need for manual intervention or multiple disassembly steps. The system serves itself by automatically adapting to the battery's presence or absence.
4Duration of action of moving object
If the battery life is short, then the vehicle can be recharged frequently, but the recharge time is relatively long requiring several hours to reach fully-charged state
Solution Approach 1:
The patent enables continuous useful action by allowing the vehicle to transition seamlessly between motor-powered and manual operation modes. When the battery depletes, the automatic disengagement mechanism allows immediate continuation of play through pedal or foot power, eliminating idle time during battery depletion. This continuity compensates for limited battery life and long recharge times by ensuring the vehicle remains usable throughout the entire battery cycle.
Data Source
AI summary
A child vehicle includes a power mechanism having a motor, at least one wheel selectively operatively coupled to the motor, and a propulsion switch coupled to the power mechanism and having a first position and a second position. The first position is from a user-initiated force. The propulsion switch automatically moves to the second position upon disengagement of the force. In the first position, the child vehicle is in the first operational mode and the wheel is being driven by the motor. In the second position, the child vehicle is in the second operational mode and the wheel is allowed to rotate substantially free from drag or resistance due to the motor. A method is also disclosed.