Backplate / Frame: mounting_hole_diameter 2.0-3.5 mm

Component Specifications

Definition

The Backplate/Frame is a rigid structural element within keypad assemblies that serves as the foundational chassis. It provides dimensional stability, precise alignment for key switches and contact mechanisms, mounting points for electronic components (PCBs, connectors), and interfaces with the host device enclosure. This component ensures consistent key actuation, protects internal electronics from mechanical stress, and maintains the overall integrity of the keypad assembly during operation and environmental exposure.

Working Principle

The Backplate/Frame operates on mechanical support principles, distributing operational forces (keypress impacts, assembly stresses) across its structure to prevent deformation. It maintains precise geometric relationships between components through designed tolerances and mounting features, ensuring reliable electrical contact and mechanical function. Its rigidity prevents flexing that could cause misalignment or inconsistent key response.

Materials

Typically made from engineering plastics (ABS, PC, PC/ABS blends) for lightweight applications or metals (aluminum alloys, stainless steel) for high-durability requirements. Materials are selected based on strength, dimensional stability, weight, cost, and compatibility with manufacturing processes like injection molding or stamping.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Thickness	1.5-3.0 mm
Material Hardness	80-95 Shore D (plastics) or 70-90 HRB (metals)
Flatness Tolerance	±0.1 mm
Operating Temperature	-20°C to +70°C
Mounting Hole Diameter	2.0-3.5 mm

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 9001, ISO 13485, IEC 61000, DIN 41612

Parent Products

This component is used in the following industrial products

Keypad Assembly

A tactile interface component for an Enterprise-Grade VoIP Desk Phone that enables user input of numbers, letters, and commands.

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Engineering Analysis

Risks & Mitigation

Dimensional deformation under load
Material fatigue over cycles
Corrosion in harsh environments
Incompatibility with mating components

FMEA Triads

Trigger: Insufficient material strength or thickness
Failure: Permanent deformation under repeated keypress forces
Mitigation: Conduct structural FEA analysis and specify materials with adequate yield strength and fatigue resistance

Trigger: Poor dimensional control during manufacturing
Failure: Misalignment of key switches causing inconsistent actuation
Mitigation: Implement statistical process control and regular dimensional verification using CMM

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Geometric dimensioning and tolerancing per ASME Y14.5, with flatness within 0.1mm and positional tolerances within 0.05mm

Test Method

Dimensional verification via coordinate measuring machine (CMM), mechanical load testing per ISO 12100, environmental testing per IEC 60068

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Backplate / Frame

Manufacturer profiles associated with Backplate / Frame.

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Frequently Asked Questions

What are the critical tolerances for Backplate/Frame manufacturing?

Critical tolerances include flatness (±0.1 mm), hole positioning (±0.05 mm), and thickness consistency (±0.05 mm) to ensure proper key alignment and mounting.

How does material selection affect Backplate/Frame performance?

Material choice impacts durability, weight, cost, and environmental resistance. Plastics offer cost-effectiveness and design flexibility, while metals provide superior strength and EMI shielding.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Backplate / Frame