Walking Doll Elastic Spring Mechanism
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Solution Overview
Problem
Traditional walking dolls rely on complex and costly clockwork mechanisms, making them inaccessible to the average consumer, while modern mass-produced dolls lack the play value and realism of earlier models.
Innovation Solution
A walking doll design that uses internal springs or rubber bands to create a realistic walking motion, with a restorative force alteration subsystem to enhance play patterns, allowing users to support and balance the doll while shifting weight to propel its legs forward, utilizing a combination of elastic bands and cam followers for adjustable restorative forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If complicated clockwork mechanisms are used to create walking motion, then realistic walking action is achieved, but manufacturing cost and device complexity increase significantly
Solution Approach 1:
The patent extracts the complex clockwork mechanism from the doll and replaces it with a simplified elastic band and cam system. The elastic band stores and releases energy to drive leg movement, while the cam mechanism converts this energy into realistic walking motion, achieving the desired effect with far fewer components.
Solution Approach 2:
The patent employs dynamic elements including elastic bands that stretch and release, cam mechanisms that convert rotational motion to reciprocating leg movement, and spring-loaded components that provide restorative force. These dynamic elements create realistic walking action without requiring complex clockwork gearing.
2Shape
If complicated clockwork mechanisms are used to create walking motion, then realistic walking action is achieved, but manufacturing cost increases making it inaccessible to average consumers
Solution Approach 1:
The patent replaces expensive, hand-crafted clockwork mechanisms with inexpensive, mass-producible components such as elastic bands, plastic cams, and simple spring assemblies. These components can be manufactured using standard molding and assembly processes, dramatically reducing cost while maintaining functional effectiveness.
Solution Approach 2:
The patent substitutes complex mechanical clockwork systems with a simpler elastic-mechanical hybrid system. The elastic bands provide energy storage and release, while simple cam mechanisms translate this into walking motion, eliminating the need for intricate gear trains and wound-spring motors characteristic of traditional clockwork dolls.
3Ease of manufacture
If mass production methods are used to reduce cost, then accessibility to average consumers is improved, but play value and realism are reduced
Solution Approach 1:
The patent incorporates dynamic cam mechanisms that convert simple rotational input into complex reciprocating leg movements, creating realistic walking action. The elastic bands provide dynamic energy storage and release, and spring components add restorative force that enhances the naturalism of the motion, all while remaining compatible with mass production.
Solution Approach 2:
The patent uses adjustable cam profiles and elastic band tension to fine-tune the walking motion characteristics. By modifying geometric parameters of the cam mechanisms and physical parameters of the elastic components, realistic walking action can be achieved through standard manufacturing processes without requiring hand-crafting.
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 a cost-effective, anatomically realistic walking doll that balances simplicity with high play value, offering a dramatic walking action and increased perceived value through adjustable restorative forces, making it appealing to a wider audience.
Implementation Method 1
a left elastic band with a first end attaching to the left leg hook and a second end attaching to the left attachment zone, and the left elastic band is stretched in tension, thus generating a compressive force between the left grooved femur ball and corresponding leg and the left hole or socket
Implementation Method 2
two legs that can move forward and backward relative to the torso and a center position of each respective leg, and that have internal springs or rubber bands that can restore the legs angularly to their respective center positions
Data Source
AI summary
A walking doll that produces a satisfying walking motion when assisted and vertically supported by a person holding the doll's hand and guiding the doll forward and from leg to leg, causing the weight to shift from leg to leg, and when the weight is relieved from one leg, that unweighted leg swings forward as a result of the influencing force of an internally located spring-like material, allowing each respective leg to move forward for the next step as weight is shifted from leg to leg.