Spinal Orthosis with Pivotable Chest Pressing Arm
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Solution Overview
Problem
Conventional spinal orthoses restrict movement and can become displaced during prolonged activities, leading to discomfort and inefficacy in reducing waist load, especially during sitting or walking.
Innovation Solution
A spinal orthosis design featuring waist mounting members with arched arms pivotally supported on both sides, a chest pressing member, and a link mechanism that generates a pressing force using a spring and link mechanism to reduce waist load without fixing the trunk, allowing for adjustable and comfortable wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the waist support body envelops the periphery of the waist to fix the trunk, then the trunk is stabilized, but the mounting position becomes displaced during prolonged sitting or walking
Solution Approach 1:
The waist support device is divided into a waist support body and separate waist mounting members that are fixed to the waist. This segmentation allows the support body to remain movable and adjustable, preventing displacement while still providing trunk stability through the connected support struts.
Solution Approach 2:
The waist support body is designed to be movable relative to the fixed waist mounting members, allowing dynamic adjustment during sitting and walking movements. This dynamic design prevents displacement while maintaining trunk stability through the joint device that allows controlled movement.
2Reliability
If the joint portion with biasing mechanism projects from the side surface of the waist support body, then the mechanism is functional, but the user's hand contacts the joint portion during hand swinging
Solution Approach 1:
The biasing mechanism is nested within the waist support body structure, with the joint portion recessed into the waist support body. This nesting conceals the mechanism from external contact during hand swinging while preserving its functional integrity for providing the necessary biasing force.
3Stability of the object's composition
If the corset compresses the waist to stabilize it, then the waist becomes stable, but the movable range of the waist is constricted and abdominal muscles are weakened
Solution Approach 1:
The support struts are designed to be movable relative to the waist support body through the joint device, allowing the waist to move freely within a natural range of motion. This dynamic design provides waist stability through the support structure while maintaining abdominal muscle function by not constricting waist movement.
4Force
If the support strut is rotated about the rotary shaft to generate resistance force, then the load on the waist is reduced, but the spring generates no resistance force when the strut is not rotated
Solution Approach 1:
The biasing mechanism provides a continuous counterbalancing force through the spring that acts on the support strut. This counterweight effect generates resistance force that reduces the load on the waist during both rotation and non-rotation states, ensuring continuous support rather than intermittent force generation.
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
Enables long-term wear without restricting body movements, effectively reducing waist load and preventing back pain by distributing the load and enhancing abdominal muscle activity.
Implementation Method 1
a spring portion (5) and a link mechanism (6) provided at a middle portion of the arm (4) and giving a pressing force for pressing the chest pressing pad (4a) to a chest
Data Source
Figure 1
Figure 2(a)~2(b)
Figure 3(a)~3(b)
AI summary
The spinal orthosis of the invention comprises: a pair of waist mounting members (2) fixed to both side surfaces of the waist; and a chest pressing member (3) installed to the each waist mounting member, wherein the chest pressing member includes: an arched arm (4) pivotally supported by pivots provided on both side surfaces of the waist mounting members and capable of swinging; a chest pressing body (4a) provided at an upper end portion of the arm; a pressing force giving portion (5,6) provided at a middle part of the arm and giving a pressing force for pressing the chest pressing body to a chest.