Assisting Device Back Frame Harness Spacing
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Solution Overview
Problem
Conventional assisting devices with frames on both sides of the body can impede user movements due to interference with the user's arms and restrict movement significantly.
Innovation Solution
The assisting device features a back frame that connects the first harness on the shoulders and the third harness on the waist, maintaining spacing without frames on both sides, and includes sliding contact faces to prevent belt interference with the user's body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If frames are disposed on both right and left sides of the user's body to maintain spacing between harnesses, then structural stability is improved, but user movement is impeded due to interference with arms
Solution Approach 1:
The back frame is divided into a pair of right and left frames that are positioned separately on each side of the user's body. Each frame independently connects the first harness and third harness, maintaining spacing without requiring a continuous structure across the back. This segmentation allows arm movement through the center space while maintaining structural stability through the distributed frame configuration.
Solution Approach 2:
The frames are configured to extend primarily in the width direction (left-right dimension) rather than spanning the entire back area. By positioning the frames laterally on the right and left sides, the design utilizes the width dimension to maintain harness spacing while leaving the central back area open for arm movement, effectively using dimensional placement to resolve the contradiction.
2Stability of the object's composition
If a rigid frame structure is used to maintain spacing between harnesses, then structural stability is improved, but the belt body may slide or interfere with the user's back
Solution Approach 1:
The frame structure incorporates a sliding contact face with specific local properties - a smooth, inclined surface designed specifically for belt contact. This localized feature allows the belt body to slide smoothly along the frame without catching or interfering with the user's back, while the rest of the frame maintains its rigid structure for spacing stability.
Solution Approach 2:
The sliding contact face acts as an intermediary element between the belt body and the frame structure. It provides a dedicated contact surface that facilitates controlled belt movement while preventing direct contact between the belt and the user's back, thereby resolving the conflict between structural stability and prevention of harmful interference.
3Ease of operation
If frames are positioned close to the user's body to minimize space occupation, then movement freedom is improved, but the belt body may come into contact with and impede movement across the user's back
Solution Approach 1:
The sliding contact face serves as an intermediary that guides the belt body along a controlled path on the frame. This allows the frame to be positioned relatively close to the user's body for minimal space occupation while preventing direct belt contact with the user's back through the mediating sliding surface.
Solution Approach 2:
The sliding contact function is extracted as a separate, dedicated feature on the frame structure. By providing a specific sliding contact face rather than relying on general frame surfaces, the design separates the belt guidance function from the structural support function, allowing the frame to be positioned closer to the body without causing belt interference with the user's back.
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
This configuration suppresses movement impediments, allowing for more unrestricted user movement while maintaining the tensional force necessary for assistance.
Implementation Method 1
A first face of the back frame that faces away from the user includes a first sliding contact face over which the belt body slides in contact therewith
Data Source
AI summary
An assisting device 10 includes a first harness 11 that is fit on at least shoulders BS of a user, a second harness 12 that is fit on each of right and left legs BL of the user, a third harness 40 that is fit on a waist BW of the user, a belt body 13 that is provided along a back of the user, spanning the first harness 11 and the second harness 12, an actuator 14 that is provided in the first harness 11 and that enables a portion of the belt body 13 to be taken up and fed out, and a back frame 44 that connects the first harness 11 and the third harness 40 at the middle of the back of the user, and maintains a spacing therebetween. An outer side face 44c of the back frame 44 that faces away from the user includes a first sliding contact face 48 over which the belt body 13 slides in contact therewith.