Adjusting Bracket Hole Geometry for Stable Operating Unit Positioning
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Solution Overview
Problem
Conventional positioning structures for operating units in ATMs are prone to displacement under external forces equal to or greater than the tightening force of the fixing screws, leading to instability.
Innovation Solution
Inclined or step-shaped rectangular holes are formed in the adjusting bracket, allowing for adjustable fastening positions of fixing screws, which reduces the necessary fixing force and increases the proof stress for maintaining the positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If rectangular holes are used in the adjusting bracket for fixing screws, then the structure is simple and easy to manufacture, but the positioning stability is insufficient under external forces equal to or larger than the tightening force
Solution Approach 1:
The patent changes the shape of the rectangular holes to trapezoidal holes with inclined surfaces. This asymmetric shape creates a mechanical interlock where the fixing screw engages with the inclined surface at an angle, providing both positioning stability and resistance to external forces while maintaining ease of manufacture through a simple geometric modification.
2Reliability
If the tightening force of fixing screws is increased to prevent displacement, then the positioning stability improves, but the risk of screw breakage increases
Solution Approach 1:
The trapezoidal hole shape with inclined surfaces creates a mechanical advantage that distributes the external force across a larger contact area and at an optimized angle. This reduces the concentration of stress on the fixing screw, allowing sufficient positioning stability to be achieved with lower tightening forces, thereby reducing the risk of screw breakage.
3Reliability
If the holding force is increased to resist customer pressing force, then the positioning stability improves, but the complexity of the structure increases
Solution Approach 1:
The patent achieves enhanced holding force through the simple geometric modification of using trapezoidal holes instead of rectangular holes. The inclined surfaces of the trapezoidal shape provide mechanical interlocking and force distribution without requiring additional components or complex structural elements, thus improving positioning stability while maintaining structural simplicity.
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
The proposed configuration enhances the holding force and stability of the operating unit by distributing the forces effectively through inclined or stepped holes, reducing the required tightening force and increasing the proof stress for maintaining the positioning.
Implementation Method 1
inclined rectangular holes are formed at the adjusting bracket, and the adjusting bracket is fixable after fastening positions of fixing screws are adjusted along the rectangular holes... a necessary fixing force due to the tightening of the fixing screws can be reduced, and a proof stress for holding a positioning can be increased
Data Source
AI summary
A positioning structure, which fixes an operating unit (1) by a fixing bracket (4) and an adjusting bracket (2) provided with stoppers (3), easily performs the positioning that prevents the positions of the stoppers (3) from being displaced due to a customer's pressing force acted to the operating unit (1). Inclined rectangular holes (6) are formed at the adjusting bracket (2), and the adjusting bracket is fixable after fastening positions of fixing screws (5) are adjusted along the rectangular holes (6). Alternatively, step shaped rectangular holes (16) are formed, and the adjusting bracket is fixable after fastening positions of the fixing screws 5 are adjusted along the rectangular holes (16).