Glass Fuse Holder Casing with Flat Pins

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Solution Overview

Problem

The existing methods for producing glass fuse holders with flat pins are complex, error-prone, and costly due to the assembly of multiple component parts, making them time-consuming and expensive to manufacture.

Innovation Solution

A method involving cold-stamping of electric conducting strips, followed by injection moulding with insulating material, and cutting to form a casing with flat pins for holding glass fuses, which simplifies the production process and integrates the necessary components into a single, symmetrical part.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple component parts are assembled to produce glass fuse holders with flat pins, then the functional requirements are met, but the production process becomes complex, error-prone, and costly

Engineering Contradiction:

Improveproduction reliabilityVSAvoidproduction process complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines multiple separate components (insulating casing, conducting parts, flat pins) into a single integrated structure. The conducting parts are embedded within the insulating material in one manufacturing process, eliminating the need for separate assembly steps and reducing production complexity while maintaining functional reliability.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The insulating material serves multiple functions simultaneously: it provides electrical insulation, structural support, mechanical protection, and housing for the conducting parts. This multi-functionality reduces the number of separate components needed, simplifying the production process while ensuring reliable operation.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If multiple component parts are assembled to produce glass fuse holders, then the necessary functions are achieved, but production time increases

Engineering Contradiction:

Improveproduct functionalityVSAvoidproduction speed

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

By merging the manufacturing of the insulating casing and conducting parts into a single injection molding process, the patent eliminates multiple assembly steps. This integration significantly reduces production time while ensuring that all functional requirements are met through the unified design.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The conducting parts are pre-positioned and embedded within the insulating material during the injection molding process itself. This preliminary action eliminates the need for subsequent assembly operations, accelerating production while ensuring proper functional integration.

Inventive Principle:

Principle #10Preliminary action

3Reliability

If multiple component parts are used in assembly, then the design requirements are satisfied, but manufacturing costs increase

Engineering Contradiction:

Improvedesign complianceVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent merges multiple manufacturing operations into a single injection molding process, reducing the number of separate production lines, tooling requirements, and quality control steps needed. This integration lowers manufacturing costs while maintaining full design compliance through the unified structure.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The insulating material is designed to perform multiple functions (insulation, support, protection, housing), eliminating the need for separate components. This reduces material costs, assembly costs, and inventory requirements while satisfying all design requirements through the multi-functional integrated structure.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

This method enables rapid, reliable, and cost-effective production of glass fuse holders with flat pins, reducing the number of parts needed and allowing for efficient assembly into terminal blocks, while also accommodating both right-hand and left-hand mounting configurations.

Implementation Method 1

inserting said strip inside a mould preferably of the injection type; over-moulding, symmetrically in the transverse direction, the conducting parts with insulating material

Methodology Applied

Scientific EffectInjection moulding:

Implementation Method 2

stamping (preferably cold-stamping) a strip of electric conducting parts connected together in the longitudinal direction

Methodology Applied

Scientific EffectCold-stamping: Cold-forming

Data Source

PatentEP1953786B1Method for producing a casing with flat pins for holding a glass fuse

Publication Date: 2015.09.16 MORSETTITALA

Figure 1~7
Figure 8a~8c

AI summary

Method for producing electric contact parts (40;140;240;340;1340), characterized in that it comprises the following stages: a) stamping (S1) a strip (10) of electric conducting parts (20) connected together in the longitudinal direction (X-X) by a continuous strip (21); b) inserting said strip (10) inside a mould (S2); c) over-moulding the conducting parts (20) with insulating material (30) depending on the final form envisaged for the electric contact part (40;140;240;340;1340); d) cutting the continuous strip (21) in the region of the flat pins (25); e) extracting the finished parts (40;140;240;340;1340).