Ergonomic Quick-Release Clamp With Parallel Guide Mechanism
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Solution Overview
Problem
Conventional quick-release clamping devices require operators to perform bending movements when transitioning between open and clamping positions, leading to unfavorable movement physiology and potential musculoskeletal strain.
Innovation Solution
The clamping device incorporates a pair of parallel guide members articulated to the base and actuating arm, maintaining the actuating arm's angular orientation relative to the base, allowing for a forward movement of the forearm parallel to the support surface without bending, thus minimizing wrist and shoulder strain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional clamping device design is used, then the clamping device can be transferred from open to clamped position, but the operator's hand must perform bending movements which are unfavorable from a physiological point of view
Solution Approach 1:
The clamping device is divided into functionally independent segments: the base (104) remains stationary while the actuating arm (110) and holding arm (108) are connected through parallel guide members (120). This segmentation allows the actuating arm to move independently while maintaining its angular orientation, enabling ergonomic straight-line hand movements without bending the wrist.
Solution Approach 2:
Parallel guide members (120) serve as intermediary elements between the base and the actuating arm. These guide members transmit motion while constraining the actuating arm to maintain its angular orientation relative to the base, thereby mediating between the operator's ergonomic movement requirement and the clamping function requirement.
2Ease of operation
If the actuating arm orientation changes during transfer, then the clamping function is achieved, but the operator experiences wrist bending and musculoskeletal strain
Solution Approach 1:
The parallel guide mechanism enables dynamic motion where the actuating arm translates in a straight line while maintaining constant angular orientation. The guide members allow the actuating arm to move from the open to clamped position without rotating or changing its angle relative to the base, keeping the operator's wrist in a neutral, ergonomic position throughout the operation.
Solution Approach 2:
The parallel guide members create an equipotential motion path where the actuating arm moves through positions that all maintain the same angular orientation relative to the base. This ensures that the operator's hand remains in a consistent ergonomic posture (forearm extended, wrist neutral) throughout the entire transfer process, eliminating wrist bending strain.
3Ease of operation
If parallel guide members are added to maintain actuating arm orientation, then ergonomic operation is improved, but the device structure becomes more complex
Solution Approach 1:
The parallel guide members are strategically positioned only where needed to constrain the actuating arm's motion. Each guide member is designed with specific local characteristics (articulated connections to base and actuating arm) that provide the necessary orientation maintenance without adding unnecessary complexity to other parts of the device.
Solution Approach 2:
The invention changes the motion parameter from rotational/angular movement to translational movement with constant orientation. By modifying the degree of freedom of the actuating arm through the parallel guide mechanism, the system transforms the operator's required movement from a bending motion to a straight-line push motion, improving ergonomics while maintaining clamping functionality.
Data Source
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AI summary
In order to create a clamping device, in particular a quick-release clamp, comprising a base, a holding arm pivotally connected to the base, an actuating arm and at least one clamping element pivotally connected to the actuating arm and to the holding arm, in which the transfer of the clamping device from the open position to the clamped position and/or from the clamped position to the open position can be carried out by an operator in a manner favorable to the movement physiology, it is proposed that the clamping device comprise at least one pair of parallel guide elements, wherein each of the parallel guide elements of a pair is pivotally connected to the base and pivotally connected to the actuating arm, and the pair of parallel guide elements, the base and the actuating arm together form a parallel guide for the actuating arm.by which the actuating arm maintains its angular alignment relative to the base when transferring the clamping device from an open position to a clamped position.