Elastic Snap-fit Cash Cassette Press-on Unit

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing cash cassettes face issues with note jams and safety failures due to rigid press-on units that are prone to displacement, especially when vertically oriented, and struggle with accommodating rolls with non-uniform diameters, leading to potential over-turning of notes and operational failures.

Innovation Solution

A cash cassette design featuring a snap-fit connection between the bottom unit and press-on unit, with an elastic second snap-in element that allows controlled movement and adaptation to varying note stacks, preventing over-turning and ensuring secure holding while allowing for sufficient displacement for feeding and stacking modules.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If a rigid press-on unit is used to hold the value note stack, then the holding force is strong, but the unit cannot accommodate displacement during feeding processes causing note jams

Engineering Contradiction:

Improveholding forceVSAvoiddisplacement accommodation

Core Design Contradiction:

StrengthVSAdaptability or versatility

Solution Approach 1:

The press-on unit is designed to be movable in the direction of deposit and opposite to the direction of deposit, transforming a static rigid structure into a dynamic one that can adapt its position during feeding operations while maintaining holding capability

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The spring mechanism changes the force parameter dynamically - providing strong holding force when notes are deposited, and allowing controlled displacement when feeding rolls need to accommodate non-uniform diameters

Inventive Principle:

Principle #35Parameter changes

2Device complexity

If the press-on unit is fixed in position, then structural simplicity is maintained, but the unit may inadvertently move into the direction of deposit when vertically oriented causing notes to turn over

Engineering Contradiction:

Improvestructural simplicityVSAvoidpositional stability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The spring provides a counterforce that opposes the weight of the value note stack, preventing the press-on unit from inadvertently moving downward when vertically oriented while maintaining structural simplicity

Inventive Principle:

Principle #8Anti-weight (Counterweight)

Solution Approach 2:

Inventive Principle:

Principle #15Dynamics

3Ease of operation

If the press-on unit allows easy movement for deposit, then note insertion is facilitated, but the unit may not provide sufficient counterforce to prevent note stack displacement

Engineering Contradiction:

Improvenote insertionVSAvoidcounterforce

Core Design Contradiction:

Ease of operationVSForce

Solution Approach 1:

The spring mechanism provides dynamic force adjustment - allowing easy movement during note insertion while automatically increasing counterforce when the note stack reaches a certain position or weight

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The spring changes the force parameter dynamically - providing strong holding force when notes are deposited, and allowing controlled displacement when feeding rolls need to accommodate non-uniform diameters

Inventive Principle:

Principle #35Parameter changes

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 snap-fit connection ensures safe and stable holding of notes, preventing jams and operational failures, even when the cassette is vertically oriented, and allows for continuous displacement to accommodate varying note stacks without turning over, ensuring reliable automatic feeding and removal processes.

Implementation Method 1

the press-on unit has a second snap-in element (40) that is complementarily formed to the first snap-in element (42). By the first and the second snap-in element, a snap-fit connection is formed between the bottom unit (22) and the press-on unit (24)

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

By the first and the second snap-in element, a snap-fit connection is formed between the bottom unit (22) and the press-on unit (24), via which snap-fit connection the counterforce required for holding the value note stack in its planned orientation is applied

Methodology Applied

Scientific EffectMechanical Fastening: Mechanical Fastener

Implementation Method 3

This press-on unit has a spring which is tensioned the more, the further the press-on unit is away from an opening of the cash cassette

Methodology Applied

Scientific EffectSpring force: Spring

Data Source

PatentEP2919205B1Cash cassette comprising a press-on unit having an elastic snap-in element

Publication Date: 2021.11.10 WINCOR NIXDORF INT GMBH

Figure 1
Figure 2
Figure 3

AI summary

The invention relates to a cash cassette (10) which comprises a receiving compartment (20) for receiving a value note stack (60) and a press-on unit (24) for exerting a counterforce directed opposite to the direction of deposit (P1) on the value note stack (60) received in the receiving compartment (20). A bottom unit (22) has at least a first snap-in element (42) and the press-on unit (24) has a second snap-in element (40) via which a snap-fit connection can be established. The second snap-in element (40) is elastically formed such that the press-on unit (24) is movable further in the direction of deposit (P1) by a predetermined distance even when the snap-fit connection is established.