Spring Clamping Element for Tool-Free Trolley Handle Fastening
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Solution Overview
Problem
Existing fastening systems for push handles on transport trolleys, such as shopping carts, are cumbersome and require manual adjustments like bending or tool-based methods to accommodate various trolley models and tolerances, lacking ease and universality.
Innovation Solution
A clamping element with multiple clamping sections, a holding element, and spring elements that securely attach the push handle to the trolley body without tools, ensuring a stable and adaptable fastening system across different trolley designs and tolerances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual adjustments like bending are used to accommodate various trolley models and tolerances, then adaptability is improved, but ease of operation deteriorates and time consumption increases
Solution Approach 1:
The clamping element incorporates spring elements that enable elastic deformation and automatic adjustment to accommodate different trolley body dimensions and tolerance ranges. The spring mechanism allows the clamping element to adapt to various trolley models without manual bending or adjustment, achieving both adaptability and ease of assembly.
Solution Approach 2:
The clamping element with spring elements performs self-adjustment to fit different trolley bodies without requiring manual intervention. The spring mechanism automatically compensates for dimensional variations and tolerance deviations, eliminating the need for operator bending or adjustment actions.
2Adaptability or versatility
If manual adjustments like bending are used to accommodate various trolley models and tolerances, then adaptability is improved, but productivity deteriorates
Solution Approach 1:
The spring elements enable the clamping element to elastically adapt to different trolley body dimensions, eliminating time-consuming manual bending operations. This allows rapid assembly across various trolley models while maintaining adaptability to dimensional variations and tolerance ranges.
Solution Approach 2:
The self-adjusting spring mechanism automatically compensates for dimensional variations without requiring operator intervention for bending or adjustment. This significantly reduces assembly time and increases productivity while maintaining universal adaptability to different trolley models.
3Ease of manufacture
If a standardized push handle bracket is used across different trolley designs, then ease of manufacture is improved, but adaptability deteriorates
Solution Approach 1:
The clamping element maintains a standardized basic structure for ease of manufacture while incorporating spring elements that provide variable adjustment capability. This allows the same standardized component to adapt to different trolley body dimensions and designs through elastic deformation and spring mechanism adjustment.
Solution Approach 2:
The standardized clamping element with spring elements serves multiple functions: it provides a consistent manufacturing base while simultaneously adapting to various trolley designs through its elastic and adjustable characteristics. This single component achieves both standardization benefits and universal compatibility.
4Reliability
If screw connection or wire support is used to achieve clamping fit, then reliability is improved, but device complexity increases
Solution Approach 1:
The invention combines the clamping function and locking function into a single integrated clamping element with spring elements. This unified structure eliminates the need for separate screw connections or wire supports, reducing device complexity while maintaining reliable fastening through the combined elastic clamping and locking mechanism.
Solution Approach 2:
The spring elements provide automatic clamping force and self-locking capability without requiring additional fastening components like screws or wires. The self-service mechanism achieves reliable fastening through the inherent elastic properties and geometric design of the clamping element itself, simplifying the overall system.
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 easy, tool-free assembly and secure attachment of push handles to transport trolleys, accommodating various designs and tolerances, while preventing wobbling and ensuring consistent positioning.
Implementation Method 1
the clamping element is provided with at least one spring element which is designed such that, in the assembled state, it presses resiliently against a section of the trolley body. This makes it possible to compensate for tolerances and to ensure that the clamping element is inserted in the assembled state in the trolley body, in particular in the handle bar, in a clamping and position-accurate manner.
Data Source
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AI summary
The present invention relates to a clamping element (10) for fastening a push-handle (200) of a trolley (100), in particular a shopping trolley (100), at least having at least one clamping section (12) for clamping fastening to a trolley body (102), in particular to a trolley basket, and further having at least one latching element (20) for latching fastening of the push handle (200).