Layered Mouse Pad Coil Assembly Without Groove Machining

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Solution Overview

Problem

Wireless optical mice face high manufacturing costs and defective products due to grooves required for coil accommodation, leading to uneven surfaces.

Innovation Solution

A wirelessly chargeable mouse pad design that integrates an induction coil sewn onto a fabric element using a lead and sewing wire, sandwiched between two pad plates, eliminating the need for grooves.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If grooves are disposed in the mouse pad to accommodate the coil, then the coil can be embedded, but the manufacturing costs increase and the operating surface becomes uneven

Engineering Contradiction:

Improvecoil accommodationVSAvoidmanufacturing costs

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The mouse pad is divided into multiple layers (first pad plate, second pad plate, surface layer) with the coil module positioned between them. This segmentation allows the coil to be integrated without requiring grooves in the main pad structure, thereby reducing manufacturing complexity and costs while maintaining a flat operating surface.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The coil is nested within a dedicated coil module that is itself nested between the first and second pad plates. This nested structure accommodates the coil without disrupting the outer surface of the mouse pad, eliminating the need for surface grooves and maintaining manufacturing simplicity.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Reliability

If grooves are disposed in the mouse pad to accommodate the coil, then the coil can be embedded, but the operating surface becomes uneven resulting in defective finished products

Engineering Contradiction:

Improvecoil accommodationVSAvoidsurface uniformity

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

By segmenting the mouse pad into multiple layers and positioning the coil within the internal structure between pad plates, the design preserves the uniformity of the outer surface. This eliminates groove-related surface irregularities and ensures a flat, defect-free operating surface.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The coil accommodation is moved from the two-dimensional surface level to the three-dimensional internal space between pad plates. This dimensional shift allows the coil to be embedded without affecting the surface uniformity, thereby maintaining manufacturing precision and product quality.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Reliability

If multiple grooves are disposed in the mouse pad, then the coil can be accommodated, but the manufacturing process becomes complex

Engineering Contradiction:

Improvecoil accommodationVSAvoidmanufacturing process

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The mouse pad structure is segmented into modular layers (first pad plate, second pad plate, surface layer) with the coil module as a separate component. This modular segmentation simplifies the manufacturing process by allowing each layer to be produced and assembled independently, eliminating the need for complex groove-forming operations.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The coil module is prepared in advance as a pre-assembled unit containing the coil, lead wire, and securing structure. This preliminary preparation simplifies the final assembly process, as the coil module can be directly positioned and fixed between the pad plates without requiring on-site groove creation or complex integration steps.

Inventive Principle:

Principle #10Preliminary action

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

Reduces manufacturing costs and increases the yield of finished products by avoiding uneven surfaces and complex manufacturing processes.

Implementation Method 1

uses a coil buried in the mouse pad to wirelessly charge the battery of the wirelessly chargeable optical mouse

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

The induction coil is superposed on the first face... The sewing wire is wound about the induction coil and penetrates through the multiple through holes to be tied with the lead wire so that the induction coil is sewed on the fabric element

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS20250323526A1Wirelessly chargeable mouse pad and coil module thereof

Publication Date: 2025.10.16 DONGGUAN PADMAT RUBBER CO LTD

AI summary

A wirelessly chargeable mouse pad (10) includes a first pad plate (1), a second pad plate (2), and a coil module (3). The coil module (3) is sandwiched between the first pad plate (1) and the second pad plate (2) and includes a fabric element (31), an induction coil (32), a lead wire (33) and a sewing wire (34). The fabric element (31) has a first face (311) and a second face (312), and is disposed with multiple through holes (313). The induction coil (32) is superposed on the first face (311). The lead wire (33) is disposed on the second face (312). The sewing wire (34) is wound about the induction coil (32) and penetrates through the through holes (313) to be tied with the lead wire (33) so that the induction coil (32) is sewed on the fabric element (31).