Dispensing Edge Fastening With Toggle Latch for Twist-Proof Labeling
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Solution Overview
Problem
Existing labeling systems face ergonomic and design challenges with complex bolt locking mechanisms that are difficult to operate and provide an unstable, twist-proof connection between the dispensing arm and dispensing edge.
Innovation Solution
A labeling unit with a tool-free tension lock mechanism using a toggle latch and clamping lever for easy, ergonomic attachment and detachment of the dispensing edge to the dispensing arm, featuring a clamping hook and locking angle for a stable, rotationally fixed connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a bolt locking mechanism is used to attach the dispensing edge to the dispensing arm, then a secure connection is achieved, but the operation becomes ergonomically difficult and time-consuming
Solution Approach 1:
The patent inverts the conventional locking approach by using a spring-loaded cam mechanism that locks automatically when the dispensing edge is inserted. Instead of requiring manual tightening of bolts, the system uses spring force to drive a cam that engages with a locking surface, creating a secure connection through the natural insertion motion rather than requiring reverse or additional manual manipulation.
Solution Approach 2:
The locking mechanism is designed to be self-actuating during the insertion process. The spring-loaded cam automatically engages with the locking surface as the dispensing edge is inserted into the dispensing arm, eliminating the need for separate manual locking operations. The system serves itself by converting the insertion motion directly into the locking action.
2Ease of operation
If a spring preload locking mechanism is used, then the locking action is automatic, but the spring tension must be counteracted for a long time making simultaneous handling difficult
Solution Approach 1:
The patent employs a dynamic cam mechanism that changes its engagement characteristics during the locking process. The cam profile is designed so that spring tension builds gradually during insertion and reaches its maximum locking force only at the final position. This dynamic approach allows the operator to insert the component freely initially, then completes the locking action with a brief final motion, avoiding the need to counteract full spring tension throughout the entire replacement process.
Solution Approach 2:
The spring-loaded cam mechanism performs preliminary positioning and alignment during the insertion process, preparing the locking surfaces for engagement before the final locking action. This preliminary action ensures that when the cam fully engages, the locking occurs instantly without requiring the operator to hold or counteract spring forces for an extended period.
3Device complexity
If a simple fastening system is used, then the design is simplified, but a rotationally secure connection cannot be achieved
Solution Approach 1:
The patent incorporates an asymmetric cam profile and corresponding locking surface geometry that prevents rotational movement. The cam mechanism is designed with a specific angular profile that engages at a predetermined orientation, making rotational displacement mechanically impossible without disengaging the lock. This asymmetric design achieves rotational security through the geometry of the locking interaction itself, rather than requiring additional rotational restraint components.
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
Facilitates quick, ergonomic, and tool-free replacement of dispensing edges with a stable, twist-proof attachment, reducing operational complexity and enhancing the reliability of the labeling process.
Implementation Method 1
A toggle latch according to the invention has a clamping lever which, when the toggle latch is closed, exerts a tensile force on an associated locking bracket or similar locking element
Implementation Method 2
The clamping lever functions in particular as a rocker arm, which, when closing, is pressed towards the components supporting the toggle latch
Data Source
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Figure 3~4
AI summary
This document describes a fastening system for attaching a dispensing edge, designed for removing labels from a backing strip, to the corresponding dispensing arm of a container labeling unit. The dispensing edge is attached to a holder that can be detached from the dispensing arm. Furthermore, the fastening system includes a tool-free locking mechanism for securing the holder to the dispensing arm. Because the locking mechanism is a lever-operated tension lock, the dispensing edge can be replaced easily, reproducibly, and ergonomically in case of wear, format changes, or similar reasons.