Speaker Pole Plate Groove Layout to Prevent Middle Breakage

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Solution Overview

Problem

The machining of grooves in steel pole plates for speakers results in a thinning of the middle region, leading to material and machining cost wastage due to breakage.

Innovation Solution

A pole plate design comprising a first, second, and third pole piece, with grooves at the edges of the second piece, having a width ratio of 0 to 0.15 and thickness less than half the plate's, reducing extrusion stress and preventing breakage during machining.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If grooves are machined in the pole plate by extrusion, then connectors can be fixed to the pole plate, but the middle region connecting the grooves becomes progressively thin and breaks

Engineering Contradiction:

Improveconnector fixationVSAvoidmiddle region strength

Core Design Contradiction:

Ease of manufactureVSStrength

Solution Approach 1:

The patent changes the geometric parameters of the grooves by limiting the width ratio to 0-0.15 and thickness ratio to 0-0.5, which reduces the material removed and prevents the middle region from becoming too thin and breaking during extrusion machining

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses partial action by making the groove thickness less than or equal to half of the pole plate thickness, removing only enough material to accommodate connectors while preserving sufficient material in the middle region to prevent breakage

Inventive Principle:

Principle #16Partial or excessive action

2Ease of manufacture

If the groove width is increased to accommodate connectors, then connector fixation is improved, but the middle region becomes thinner and more prone to breakage

Engineering Contradiction:

Improveconnector accommodationVSAvoidpole plate integrity

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent establishes specific parameter ranges for groove width (0-0.15 times pole plate width) and thickness (0-0.5 times pole plate thickness) to balance connector accommodation with maintaining pole plate integrity and preventing breakage

Inventive Principle:

Principle #35Parameter changes

3Ease of manufacture

If extrusion machining is performed on grooves, then connectors can be installed, but material waste and machining cost increase

Engineering Contradiction:

Improveconnector installationVSAvoidraw material waste

Core Design Contradiction:

Ease of manufactureVSLoss of substance

Solution Approach 1:

The patent removes only the necessary amount of material by limiting groove dimensions, avoiding excessive material removal while still providing sufficient space for connector installation, thereby reducing raw material waste and machining costs

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS12610192B2Pole plate and speaker

Publication Date: 2026.04.21 AAC MICROTECH (CHANGZHOU) CO LTD

AI summary

A pole plate includes first to third pole pieces formed into one piece. The second pole piece has grooves respectively formed in edges of two long sides of a first surface. Since a ratio of a width of the groove to a width of the pole plate falls between 0 and 0.15, the width of the groove is far smaller than the width of the pole plate. In a width direction of the pole plate, there is a long distance between the two grooves, as well as long distances from a middle of the second pole piece to the two grooves. Therefore, when the two grooves are machined, extrusion on the middle position of the second pole piece can be effectively reduced, and the middle position of the second pole piece is not broken for the extrusion, which does not waste machining cost and improves a machining efficiency.