Modular Checkout Assembly With Tool-Free Plug-In Latching
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Solution Overview
Problem
Existing checkout systems require the use of tools for replacing computer and peripheral modules, and their latching mechanisms are complex and space-consuming.
Innovation Solution
The system employs an electrical plug device for module connection and a latching device for secure locking and unlocking, allowing modules to be connected and disconnected without tools, using a distribution module as an intermediary for electrical transmission and simplifying assembly with a snap connection mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If threaded fasteners are used to attach the hard disk to the computer module, then secure mechanical connection is achieved, but replacement requires tools and becomes more complex
Solution Approach 1:
The patent replaces the threaded fastener mechanical system with a snap-fit latching mechanism. The latching device includes a latch member that engages with a receptacle on the computer module, providing secure mechanical connection without requiring threaded fasteners. This allows tool-free installation and removal while maintaining connection strength.
Solution Approach 2:
The patent changes the mechanical connection parameter from threaded engagement to elastic snap-fit engagement. The latching device utilizes elastic deformation of the latch member to achieve secure engagement with the receptacle, enabling tool-free operation while maintaining strong mechanical connection.
2Ease of operation
If a latching mechanism with lever mechanism and latch bar is used, then tool-free latching is achieved, but the mechanism becomes complex and requires more space
Solution Approach 1:
The patent extracts the essential latching function from the complex lever mechanism and latch bar system. It retains only the necessary latch member and receptacle components, eliminating unnecessary mechanical elements like levers and long latch bars. This simplifies the mechanism while maintaining tool-free operation capability.
Solution Approach 2:
The patent introduces a spring as an intermediary element between the latch member and the housing. The spring provides the necessary elastic force for engagement and release, simplifying the overall mechanism by replacing complex lever systems with a simple elastic intermediary that enables tool-free latching.
3Ease of repair
If modules are designed for easy replacement without tools, then maintenance cost is reduced, but secure locking and electrical contact reliability may be compromised
Solution Approach 1:
The patent merges the mechanical latching function and electrical contact function into a single integrated module connection system. The peripheral module connects to the computer module through both mechanical latching (providing secure locking) and electrical plug devices (providing reliable electrical contact) simultaneously, ensuring both reliability and ease of replacement.
Solution Approach 2:
Instead of using complex mechanisms to achieve tool-free operation, the patent inverts the approach by designing the connection interface to naturally guide and secure the modules through elastic snap-fit engagement. The latch member automatically engages with the receptacle when modules are connected, providing secure locking without requiring complex locking mechanisms.
Data Source
AI summary
A checkout system for handling sales or payment transactions with a computer module for electronically processing payment-related data, with at least one peripheral module which is connected electrically and mechanically to the computer module, wherein a housing wall of at least one peripheral device adjoins a housing wall of the computer module such that the mutually facing housing walls of said computer module and said peripheral module are arranged parallel, characterized in that the peripheral module (3) is in electrical contact with the computer module (2) and/or with a further peripheral module (4) by means of an electrical plug device (23, 28), wherein the electrical plug device (23, 28) has at least corresponding plug/connection elements (24, 29) which are respectively arranged on the mutually facing housing walls (14, 15) of the adjacent modules (2, 3, 4), and wherein the peripheral module (3) can be mechanically locked to the computer module (2) and/or to at least the further peripheral module (4) by means of a latching device (18, 25).