Movable Hoist Handle Prevents Lifting Strap Slippage
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Solution Overview
Problem
Existing hoists for assisting individuals in transitioning between seated, lying, and standing positions often result in reduced comfort and safety due to the lifting strap slipping when the user grips the lifting arm, leading to uncomfortable and unsafe positions.
Innovation Solution
A hoist with a movable handle that shifts relative to the lifting arm, maintaining an angle of less than or equal to 90° with the user's torso, and a non-rigid connection allowing delayed force transfer during operation, ensuring the lifting strap remains securely positioned.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the user grips the lifting arm directly, then the user feels a subjective sense of safety, but the lifting strap slips into uncomfortable or unsafe positions
Solution Approach 1:
A handle is introduced as an intermediary component between the user's hands and the lifting arm. The handle is positioned on the lifting arm such that when the user grips it, the connecting element remains properly positioned around the user's torso, preventing slippage while providing a secure grip point.
Solution Approach 2:
The handle is designed to automatically position itself on the lifting arm at the correct location during operation, eliminating the need for manual adjustment by the user. The handle's position is self-regulating based on the lifting arm's movement, ensuring continuous proper positioning of both the handle and connecting element.
2Device complexity
If the handle is fixed on the lifting arm, then the structure is simple, but the handle cannot maintain optimal position during lifting phases
Solution Approach 1:
The handle is designed to move relative to the lifting arm during operation. It is positioned such that during a first phase of lifting, the lifting arm moves while the handle remains stationary, and during a second phase, both move together. This dynamic positioning maintains the handle in an optimal location for user grip throughout the lifting sequence.
3Ease of operation
If the handle moves with the lifting arm throughout operation, then the handle remains accessible, but the connecting element may shift to unsafe positions
Solution Approach 1:
The handle's movement is divided into periodic phases: during a first phase of the lifting operation, the lifting arm moves while the handle remains stationary, allowing the connecting element to be properly positioned; during a second phase, both the handle and lifting arm move together, maintaining accessibility. This phased movement pattern ensures the connecting element remains secure while the handle stays accessible.
Data Source
AI summary
In a first aspect, the present invention relates to a hoist for facilitating a transition between firstly a seated or lying position and secondly a standing position of an individual, comprising: a movable lifting arm for exerting a lifting force, a connecting element for transferring the lifting force from the lifting arm to the individual, and a movable handle suitable for supporting the hands of the individual during operation of the hoist, wherein the movable handle is configured to shift during operation of the hoist, wherein during operation of the hoist, the movable handle also executes a movement relative to the lifting arm.