Telescopic Dual Handle Shaft for Adjustable Two-User Grip
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Solution Overview
Problem
Existing devices with multiple grips, such as umbrellas, lack the ability to adjustably position the second grasping handle relative to the first, limiting their usability for users of different heights, and often require complex mechanisms for handle deployment and storage.
Innovation Solution
An extendable dual handle system with a telescopic extension member that allows the second grasping handle to be positioned at various distances from the first, including an inoperative position within the first handle, using snap locking and twist locking mechanisms for secure attachment and deployment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a second grasping handle is added to accommodate users of different heights, then the device becomes more adaptable, but the device complexity increases
Solution Approach 1:
The second grasping handle is nested within the first grasping handle when not in use. The extension member with the second handle telescopes into the shaft of the first handle, creating a compact configuration that reduces device complexity while maintaining adaptability for different user heights.
Solution Approach 2:
The extension member is designed to be dynamically adjustable, allowing it to extend to various lengths to accommodate different user height requirements. This dynamic adjustment capability enables the device to adapt to different users while maintaining a compact form when retracted.
2Ease of operation
If the second grasping handle is made extendable to various positions, then the ease of operation improves, but the device complexity increases
Solution Approach 1:
The locking mechanism operates automatically through self-service design. When the extension member is pushed or pulled to the desired position, the locking arms engage with the corresponding locking surfaces on the shaft without requiring manual intervention. This simplifies the operation for users while managing the complexity through automatic engagement.
Solution Approach 2:
The locking mechanism replaces complex multi-component mechanical systems with simpler friction-based or cam-based locking surfaces. The locking arms and surfaces create a straightforward mechanical engagement that is easy to operate while minimizing the number of parts required.
3Volume of moving object
If the second grasping handle is retracted into the first handle, then the device becomes more compact, but the ease of operation deteriorates
Solution Approach 1:
The extension member is pre-loaded with spring force or positioned to facilitate easy deployment. When the user pulls the second handle, the pre-stored energy in the spring or the mechanical advantage of the telescopic design automatically assists in extending the handle to its operational position, making deployment easy despite the compact stored configuration.
Data Source
AI summary
In a device that includes an elongated member and a first grasping handle associated therewith for holding or manipulation of the device, the present invention provides an improvement in the form of a second grasping handle and extension member that is operatively associated with the elongated member. The extension member is capable of adjustably and fixedly positioning the second grasping handle in any one of a number of fixed positions spaced a distance away from the first grasping handle, including an inoperative position and a number of operative positions. When the second grasping handle is in an operative position, a first user can grasp the first grasping handle and a second user can grasp the second grasping handle. The second grasping handle when in the inoperative position is attached to or located at least partially or fully within the first grasping handle.