Toy Figure Torso Rotation with Stationary Head
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Solution Overview
Problem
Existing toy action figures lack a realistic and unique motion feature where the head remains stationary while the torso rotates, failing to create a convincing action fighting pose.
Innovation Solution
The design incorporates a mechanism where the torso can rotate while the head remains fixed, utilizing a spine, pelvis, and linkage system, with activation by squeezing the legs to transfer motion to the torso and movable arms, allowing for a 'punch thrown' or 'ka-pow' position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the torso is made rotatable to create dynamic action poses, then the play value and realism are improved, but the head stability deteriorates (head rotates with torso)
Solution Approach 1:
The action figure is divided into separate rotational and stationary components. The torso is segmented to rotate independently on the spine axis, while the head is separately mounted on the spine to remain stationary. This segmentation allows the torso to achieve dynamic rotation for action poses while the head maintains stability facing forward, resolving the contradiction between torso adaptability and head stability.
2Stability of the object's composition
If a linkage system is added to enable head stabilization, then the head position stability is improved, but the device complexity increases
Solution Approach 1:
The head stabilization function is extracted from the torso rotation mechanism. Instead of using a complex linkage system connecting the head to the torso, the head is directly mounted on the spine axis, separating the rotational function (torso) from the stabilization function (head). This extraction simplifies the overall mechanism while achieving both torso rotation and head stability.
Solution Approach 2:
The spine serves multiple functions: it acts as the central support structure, the rotation axis for the torso, and the mounting axis for the stationary head. This multi-functionality eliminates the need for separate stabilization linkages, reducing device complexity while maintaining head position stability during torso rotation.
Data Source
AI summary
A toy figure is provided that incorporates a torso, rotatably mounted on a spine, a pelvis fixed to the spine separate from the torso, a movable leg mounted on the pelvis, and a movable arm movably mounted to the torso. A lever extending from the movable leg into the torso rotates the torso on the spine as a result of the motion of the leg. The movable arm, attached to the spine by a linkage, is moved as a result of the relative motion of the rotating torso and the spine. The linkage may be attached within the movable arm near the shoulder or near the elbow.