Custom Micro-Springs & Touch Spring Manufacturer
Manufacturing precision micro-springs from 0.08mm wire diameter with up to 10M+ cycle fatigue life. We deliver superior conductivity and precise haptic feedback for smart electronic devices.
Industry Overview
In the era of extreme miniaturization, precision micro springs are critical to product reliability. Global electronics OEMs face three core challenges:
- Space Constraints: Delivering sufficient force and travel in microscopic spaces (<2mm).
- Conductivity Stability: Ensuring low contact resistance and oxidation resistance to prevent signal failure.
- Ultra-High Fatigue Life: Maintaining zero force attenuation over millions of cycles.
Application Coverage
- Wearables: TWS earphone charging contacts, smartwatch strap clasps, VR headset adjustment mechanisms.
- Consumer Electronics: Smartphone camera motors, side-key micro-switches, vibration motors, keyboard switches.
- Smart Home: Smart lock clutch springs, sensor probes, thermostat connectors.
- E-Cigarettes: Electrode contact springs, e-liquid valve springs.
Electronic Solutions & Customization Capabilities
HERSHEY provides precision, customizable spring solutions for the electronics industry, ensuring reliable performance, optimized load management, and compact designs. Our expertise supports various electronic devices, including sensors, switches, connectors, and circuit assemblies, delivering high durability and stability for demanding applications.
Industry-Grade Materials
High-Conductivity Alloys:
- Beryllium Copper (C17200): Offers the optimal balance of elasticity and conductivity, ideal for high-end battery contacts and high-frequency connectors.
- Phosphor Bronze (C5191): A cost-effective conductive material widely used in standard switches and sockets.
High-Strength & Non-Magnetic Alloys:
- Stainless Steel (304/316L): Preferred for wearable and medical electronics, resistant to sweat corrosion and medical-grade clean.
- Titanium Alloy: Ultra-lightweight and fully non-magnetic, suitable for precision optical anti-shake modules.
Surface Treatments:
- Gold/Silver Plating: Provides ultra-low contact resistance and prevents oxidation.
- Nickel Plating: Offers basic corrosion and wear resistance.
Mechanical / Product Customization Options
Complex Geometry Customization:
- Battery Springs: Conical designs to achieve minimal compressed height.
- Phosphor BronzAntenna Springs: Specific pitch engineered to match RF signal frequencies.e (C5191): A cost-effective conductive material widely used in standard switches and sockets.
Force Profile Customization:
- Non-linear Force: Provides special tactile "steps" or feedback for buttons.
- Constant Force Springs: Used in carbon brushes or smooth screen sliding rails.
Quality & Compliance
Environmental Compliance：
- RoHS Compliant: Strict control of lead, mercury, cadmium, and other hazardous substances in accordance with EU standards.
- REACH Compliant: Meets regulations for the Registration, Evaluation, Authorization, and Restriction of Chemicals.
Quality Tools:
- Automated Optical Inspection (AOI): 100% dimensional inspection to eliminate defective parts.
- PPAP Level 3: Provides full Production Part Approval Process documentation for high-end customers.
Industry-Focused Processes
Micro-Coiling Capability:
- Wire Diameter Range: 0.08 mm – 0.8 mm
- Tight D/d Index Support: Capable of extremely small coil ratios for compact space applications.
Cleanliness Control:
- Ultrasonic Cleaning: Removes micro-oil and debris to ensure dust-free delivery.
- Passivation: Enhances the corrosion resistance of stainless steel surfaces.
Durability & Reliability Enhancements
- Vacuum Heat Treatment: Relieves machining stresses in an oxygen-free environment, prevents surface oxidation/discoloration, and stabilizes dimensions.
- Pre-setting / Strong Pressing: Eliminates initial permanent deformation, ensuring no free-height loss over long-term use.
- Fatigue Life Engineering: Designed for micro-switches with a lifecycle of 1–5 million cycles.
Quality Assurance & Certifications
Environmental Compliance：
- RoHS Compliant: Strict control of lead, mercury, cadmium, and other hazardous substances in accordance with EU standards.
- REACH Compliant: Meets regulations for the Registration, Evaluation, Authorization, and Restriction of Chemicals.
Quality Tools:
- Automated Optical Inspection (AOI): 100% dimensional inspection to eliminate defective parts.
- PPAP Level 3: Provides full Production Part Approval Process documentation for high-end customers.
Frequently Asked Questions
We specialize in micro-precision manufacturing. We can process wire diameters as small as 0.08mm with outer diameters under 0.5mm. Whether for pogo pins, connectors, or micro-motors, we ensure structural precision at a microscopic scale.
We understand that “feel” translates to “force tolerance.” For button springs, we utilize high-precision automated machines to control force tolerance within ±2g to ±5g. Through CPK process control, we guarantee consistent haptic feedback across millions of units.
We recommend Beryllium Copper or Phosphor Bronze, which offer an excellent balance of elasticity and conductivity. To further reduce contact resistance and prevent oxidation, we offer Gold or Silver Plating, ideal for battery contacts and signal transmission components.
Yes. We offer Titanium or Non-magnetic Stainless Steel. We strictly control magnetic introduction during processing to ensure the springs do not interfere with electromagnetic signals in sensors or voice coil motors.
We use Ultrasonic Cleaning as a standard process to thoroughly remove machining oil and micro-debris. For critical orders, we offer dust-free packaging to ensure springs do not contaminate PCBs or optical components during assembly.
That’s a great question. To prevent tangling and suit automated assembly lines, we offer various packaging solutions: PET Film Tackiness, Tray Packaging, and even Tape & Reel for SMT processes.
High-End Electronics
High-Frequency Micro-Contacts for Smartwatch Heart Rate Sensors Challenge: In the heart rate module of a leading smart wearable brand’s watch, the space for the contact springs was less than 2 mm. Prolonged exposure to human sweat caused oxidation of the springs, leading to poor contact and intermittent heart rate data.Hershey Precision Springs Solution: We utilized highly corrosion-resistant SUS316L stainless steel for micro-precision stamping. To ensure conductivity, we applied a thick gold plating to the extremely small contact areas. Combined with excellent flatness control, this ensures the contacts provide stable contact resistance within the confined space, completely resolving the data interruption issue.