{"id":3709,"date":"2026-03-19T15:07:33","date_gmt":"2026-03-19T07:07:33","guid":{"rendered":"https:\/\/www.handashielding.com\/?p=3709"},"modified":"2026-03-19T15:19:06","modified_gmt":"2026-03-19T07:19:06","slug":"emi-helical-spring-the-complete-guide-to-conductive-spiral-shielding-solutions","status":"publish","type":"post","link":"https:\/\/www.handashielding.com\/ja\/emi-helical-spring-the-complete-guide-to-conductive-spiral-shielding-solutions\/","title":{"rendered":"EMI\u30d8\u30ea\u30ab\u30eb\u30b9\u30d7\u30ea\u30f3\u30b0\uff1a\u5c0e\u96fb\u6027\u30b9\u30d1\u30a4\u30e9\u30eb\u30b7\u30fc\u30eb\u30c9\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u306e\u5b8c\u5168\u30ac\u30a4\u30c9"},"content":{"rendered":"<p>Discover how EMI Helical Springs (spiral springs) provide superior electromagnetic interference shielding. Learn about their design, materials, attenuation performance up to -80 dB, and applications in aerospace, medical, and electronics industries.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Introduction: The Growing Challenge of Electromagnetic Interference<\/h2>\n\n\n\n<p>In our increasingly connected world, electromagnetic interference (EMI) has become a pervasive challenge affecting everything from consumer electronics to mission-critical aerospace systems. EMI can result from both unintentional sources\u2014such as electrical wiring, thermal noise, and static discharges\u2014and intentional sources like radio signals, cellular networks, and wireless communication systems&nbsp;<a href=\"https:\/\/patents.justia.com\/patent\/20100224400\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a>.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"750\" height=\"750\" src=\"https:\/\/www.handashielding.com\/wp-content\/uploads\/2024\/09\/helical-seal-springs-123-1.png\" alt=\"EMI\u30d8\u30ea\u30ab\u30eb\u30b9\u30d7\u30ea\u30f3\u30b0-Handa Shielding\" class=\"wp-image-1982\" style=\"aspect-ratio:4\/3;object-fit:cover\" srcset=\"https:\/\/www.handashielding.com\/wp-content\/uploads\/2024\/09\/helical-seal-springs-123-1.png 750w, https:\/\/www.handashielding.com\/wp-content\/uploads\/2024\/09\/helical-seal-springs-123-1-300x300.png 300w, https:\/\/www.handashielding.com\/wp-content\/uploads\/2024\/09\/helical-seal-springs-123-1-150x150.png 150w, https:\/\/www.handashielding.com\/wp-content\/uploads\/2024\/09\/helical-seal-springs-123-1-12x12.png 12w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/figure>\n\n\n\n<p>The elimination of EMI is crucial in electronic system design. Placement of components, along with the use of shielding and filtering, makes it possible to control and reduce interference that can disrupt system function. However, electrical discontinuities in enclosures\u2014such as joints, seams, and gaps\u2014directly affect the frequency and amount of EMI that can breach shielding&nbsp;<a href=\"https:\/\/patents.justia.com\/patent\/20100224400\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a>.<\/p>\n\n\n\n<p>Enter the\u00a0<strong><a href=\"https:\/\/www.handashielding.com\/\">EMI\u30d8\u30ea\u30ab\u30eb\u30b9\u30d7\u30ea\u30f3\u30b0<\/a><\/strong>: a specialized conductive spring design that combines mechanical resilience with exceptional electromagnetic shielding performance. This comprehensive guide explores how these components work, their key advantages, and how to select the right solution for your application.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">What is an EMI Helical Spring?<\/h2>\n\n\n\n<p>An EMI helical spring (also known as a spiral spring or conductive coil spring) is a precision-engineered component designed to provide both mechanical spring force and electromagnetic interference shielding in a single integrated solution&nbsp;<a href=\"https:\/\/www.handaspring.com\/helical-seal-springs.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><a href=\"https:\/\/www.parjetseals.com\/en-US\/newsc22-emi-shielding-helical-spring-spiral-springs-and-canted-coil-spring\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Fundamental Design Principles<\/h3>\n\n\n\n<p>Unlike standard helical springs that simply store mechanical energy, EMI helical springs are engineered with specific geometries and materials to create continuous conductive pathways. Key design features include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Modified spring geometry<\/strong>\u00a0optimized for consistent electrical contact<\/li>\n\n\n\n<li><strong>\u8907\u6570\u306e\u30b3\u30f3\u30bf\u30af\u30c8\u30dd\u30a4\u30f3\u30c8<\/strong>\u00a0along the spring circumference<\/li>\n\n\n\n<li><strong>Ability to maintain seal integrity<\/strong>\u00a0during dynamic movements<\/li>\n\n\n\n<li><strong>Adaptability to various<\/strong>\u00a0shielding configurations\u00a0<a href=\"https:\/\/www.handaspring.com\/helical-seal-springs.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Overlap Helical Coil Design<\/h3>\n\n\n\n<p>A particularly effective configuration is the&nbsp;<strong>overlap helical coil<\/strong>, where adjacent loops of a conductive ribbon overlap along the width of the ribbon. This design creates a cross-diametric compression spring with superior shielding characteristics&nbsp;<a href=\"https:\/\/patents.justia.com\/patent\/20100224400\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a>.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">\u8a2d\u8a08\u30d1\u30e9\u30e1\u30fc\u30bf<\/th><th class=\"has-text-align-left\" data-align=\"left\">Typical Range<\/th><th class=\"has-text-align-left\" data-align=\"left\">Optimal for Shielding<\/th><\/tr><\/thead><tbody><tr><td>Ribbon Width<\/td><td>0.060-0.300 inches<\/td><td>Wider ribbons increase contact area<\/td><\/tr><tr><td>Ribbon Thickness<\/td><td>0.003-0.006 inches<\/td><td>Thinner ribbons improve flexibility<\/td><\/tr><tr><td>Overlap Distance<\/td><td>20-40% of width<\/td><td>30% overlap provides optimal balance<\/td><\/tr><tr><td>Coil Diameter<\/td><td>&lt;3\u00d7 ribbon width<\/td><td>Compact designs improve space efficiency<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">How EMI Helical Springs Achieve Shielding<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">The Three Mechanisms of EMI Shielding<\/h3>\n\n\n\n<p>EMI\/RFI shielding is achieved through three main mechanisms:&nbsp;<strong>Reflection, Absorption, and Multiple Reflection<\/strong>&nbsp;<a href=\"https:\/\/www.parjetseals.com\/en-US\/newsc22-emi-shielding-helical-spring-spiral-springs-and-canted-coil-spring\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a>.<\/p>\n\n\n\n<p><strong>How Helical Springs Leverage These Mechanisms:<\/strong><\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>\u30ea\u30d5\u30ec\u30af\u30b7\u30e7\u30f3<\/strong>: The conductive material of the helical spring reflects the electric component of electromagnetic waves. Materials with high electrical conductivity\u2014such as silver, copper, and conductive alloys\u2014are most effective for this mechanism\u00a0<a href=\"https:\/\/www.parjetseals.com\/en-US\/newsc22-emi-shielding-helical-spring-spiral-springs-and-canted-coil-spring\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a>.<\/li>\n\n\n\n<li><strong>\u5438\u53ce<\/strong>: The magnetic component of EMI is addressed through absorption, which requires materials with high magnetic permeability. Stainless steel alloys and iron-nickel alloys (including mu-metal) excel at this function\u00a0<a href=\"https:\/\/www.parjetseals.com\/en-US\/newsc22-emi-shielding-helical-spring-spiral-springs-and-canted-coil-spring\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a>.<\/li>\n\n\n\n<li><strong>\u591a\u91cd\u53cd\u5c04<\/strong>: The helical geometry itself creates multiple reflecting boundaries that scatter electromagnetic waves, further reducing interference through internal reflections\u00a0<a href=\"https:\/\/www.parjetseals.com\/en-US\/newsc22-emi-shielding-helical-spring-spiral-springs-and-canted-coil-spring\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a>.<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">Continuous Conductive Pathways<\/h3>\n\n\n\n<p>The overlapping design of advanced EMI helical springs creates a low-impedance conductive network between components, redirecting EMI away from sensitive electronics. When properly installed, these springs establish:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u30d5\u30a1\u30e9\u30c7\u30fc\u30b1\u30fc\u30b8\u52b9\u679c<\/strong>: The spring&#8217;s continuous conductive loops encapsulate components, blocking external EMI<\/li>\n\n\n\n<li><strong>\u63a5\u5730\u7d71\u5408<\/strong>: Springs maintain electrical continuity to system ground planes, dissipating interference\u00a0<a href=\"https:\/\/www.handashielding.com\/high-conductivity-emi-shielding-canted-coil-springs.html\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Materials for EMI Helical Springs<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Standard Materials<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">\u7d20\u6750<\/th><th class=\"has-text-align-left\" data-align=\"left\">\u4e3b\u8981\u7269\u4ef6<\/th><th class=\"has-text-align-left\" data-align=\"left\">\u30d9\u30b9\u30c8\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3<\/th><\/tr><\/thead><tbody><tr><td><strong>Stainless Steel (301, 316)<\/strong><\/td><td>Good strength, corrosion resistance, magnetic permeability<\/td><td>General industrial, automotive, aerospace<\/td><\/tr><tr><td><strong>\u30d9\u30ea\u30ea\u30a6\u30e0\u9285<\/strong><\/td><td>Excellent conductivity (22-28% IACS), fatigue resistance<\/td><td>High-conductivity requirements, connectors<\/td><\/tr><tr><td><strong>\u30ea\u30f3\u9752\u9285<\/strong><\/td><td>Good corrosion resistance, cost-effective<\/td><td>Industrial environments, consumer electronics<\/td><\/tr><tr><td><strong>\u9285\u5408\u91d1<\/strong><\/td><td>High conductivity, easily plated<\/td><td>EMI shielding, grounding applications<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u30e1\u30c3\u30ad\u30fb\u30aa\u30d7\u30b7\u30e7\u30f3<\/h3>\n\n\n\n<p>The conductive ribbon can be plated with various metals to enhance performance:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Plating Material<\/th><th class=\"has-text-align-left\" data-align=\"left\">\u30d9\u30cd\u30d5\u30a3\u30c3\u30c8<\/th><th class=\"has-text-align-left\" data-align=\"left\">Typical Application<\/th><\/tr><\/thead><tbody><tr><td>\u30b7\u30eb\u30d0\u30fc<\/td><td>Highest conductivity, corrosion resistance<\/td><td>High-frequency, mission-critical<\/td><\/tr><tr><td>\u30b4\u30fc\u30eb\u30c9<\/td><td>Excellent conductivity, biocompatible<\/td><td>Medical, aerospace<\/td><\/tr><tr><td>\u30cb\u30c3\u30b1\u30eb<\/td><td>Good corrosion resistance, cost-effective<\/td><td>General industrial<\/td><\/tr><tr><td>\u932b<\/td><td>Solderability, cost-effective<\/td><td>\u5bb6\u96fb\u88fd\u54c1<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Exotic Alloys for Extreme Environments<\/h3>\n\n\n\n<p>For applications requiring superior performance in harsh conditions:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Alloy<\/th><th class=\"has-text-align-left\" data-align=\"left\">\u4e3b\u306a\u7279\u5fb4<\/th><th class=\"has-text-align-left\" data-align=\"left\">\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3<\/th><\/tr><\/thead><tbody><tr><td><strong>Hastelloy C276<\/strong><\/td><td>Superior corrosion resistance<\/td><td>Chemical processing, offshore<\/td><\/tr><tr><td><strong>Elgiloy\/Phynox<\/strong><\/td><td>High strength, extreme temperature resistance<\/td><td>Aerospace, medical implants<\/td><\/tr><tr><td><strong>\u30a4\u30f3\u30b3\u30cd\u30eb<\/strong><\/td><td>\u9ad8\u6e29\u5b89\u5b9a\u6027<\/td><td>Gas turbines, high-temperature processing<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Performance Characteristics and Test Data<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Attenuation Performance<\/h3>\n\n\n\n<p>EMI helical springs can achieve remarkable shielding effectiveness. Test data from overlapping helical coil designs shows:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Attenuation<\/strong>: Up to -70 dB to -80 dB reduction in electromagnetic energy passing through shielded spaces<\/li>\n\n\n\n<li><strong>\u5468\u6ce2\u6570\u7bc4\u56f2<\/strong>: Substantially constant attenuation from 1 MHz to 600 MHz<\/li>\n\n\n\n<li><strong>Attenuation Resistance Rating<\/strong>: Not less than 2.0 dB ohms per inch, with premium designs achieving >3.5 dB ohms per inch\u00a0<a href=\"https:\/\/patents.justia.com\/patent\/20100224400\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Comparative Test Results<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Sample Type<\/th><th class=\"has-text-align-left\" data-align=\"left\">\u7d20\u6750<\/th><th class=\"has-text-align-left\" data-align=\"left\">DC Resistance<\/th><th class=\"has-text-align-left\" data-align=\"left\">Compressive Load<\/th><th class=\"has-text-align-left\" data-align=\"left\">Attenuation Performance<\/th><\/tr><\/thead><tbody><tr><td>Overlapping Helical Coil<\/td><td>301 SS (0.002&#8243;\u00d70.125&#8243;)<\/td><td>30.06 m\u03a9\/in<\/td><td>7.0 lb\u00b7ft\/in @ 0.015&#8243;<\/td><td>Superior (optimized overlap)<\/td><\/tr><tr><td>Non-Overlapping Helical<\/td><td>301 SS (0.004&#8243;\u00d70.062&#8243;)<\/td><td>14.43 m\u03a9\/in<\/td><td>9.8 lb\u00b7ft\/in @ 0.015&#8243;<\/td><td>Standard<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>The overlapping design provides significantly better EMI attenuation due to continuous contact and reduced gap formation&nbsp;<a href=\"https:\/\/patents.justia.com\/patent\/20100224400\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Key Performance Metrics<\/h3>\n\n\n\n<p>When evaluating EMI helical springs, consider these critical parameters:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>DC Resistance<\/strong>: Lower resistance indicates better conductivity (typical range: 14-30 m\u03a9\/inch)<\/li>\n\n\n\n<li><strong>Compressive Load<\/strong>: Affects contact pressure and consistency (5-10 lb\u00b7ft\/inch typical)<\/li>\n\n\n\n<li><strong>Attenuation Flatness<\/strong>: Consistency across frequency range<\/li>\n\n\n\n<li><strong>\u30ea\u30c0\u30f3\u30c0\u30f3\u30b7\u30fc<\/strong>: Multiple contact points ensure reliability under vibration<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u696d\u754c\u3092\u8d85\u3048\u305f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u822a\u7a7a\u5b87\u5b99\u30fb\u9632\u885b<\/h3>\n\n\n\n<p>EMI helical springs are critical in aerospace applications where system failure is not an option:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u822a\u7a7a\u96fb\u5b50\u5de5\u5b66<\/strong>: Shielding flight control systems from radar and communication interference<\/li>\n\n\n\n<li><strong>\u885b\u661f\u30b3\u30cd\u30af\u30bf\u30fc<\/strong>: Ensuring signal integrity in space-grade applications<\/li>\n\n\n\n<li><strong>Missile systems<\/strong>: Protecting guidance electronics from electromagnetic pulses\u00a0<a href=\"https:\/\/www.handaspring.com\/helical-seal-springs.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><a href=\"https:\/\/www.handashielding.com\/high-conductivity-emi-shielding-canted-coil-springs.html\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/li>\n<\/ul>\n\n\n\n<p><strong>Case Study<\/strong>: In satellite communication systems, gold-plated beryllium copper helical springs provided 40 dB EMI attenuation at 2-18 GHz, maintaining contact under thermal cycling from -65\u00b0C to 150\u00b0C&nbsp;<a href=\"https:\/\/www.handashielding.com\/high-conductivity-emi-shielding-canted-coil-springs.html\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u533b\u7642\u6a5f\u5668<\/h3>\n\n\n\n<p>The medical industry relies on EMI helical springs for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>MRI-compatible equipment<\/strong>: Non-magnetic materials prevent imaging artifacts<\/li>\n\n\n\n<li><strong>\u30a4\u30f3\u30d7\u30e9\u30f3\u30c8\u6a5f\u5668<\/strong>: Biocompatible materials with reliable shielding<\/li>\n\n\n\n<li><strong>Diagnostic equipment<\/strong>: Protection of sensitive electronics from interference\u00a0<a href=\"https:\/\/www.handaspring.com\/helical-seal-springs.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Automotive and Electric Vehicles<\/h3>\n\n\n\n<p>With the rise of EVs, EMI shielding has become increasingly critical:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Battery management systems<\/strong>: Protection of sensors from high-voltage inverter interference<\/li>\n\n\n\n<li><strong>Charging systems<\/strong>: Maintaining signal integrity during power transfer<\/li>\n\n\n\n<li><strong>Control electronics<\/strong>: Shielding from electromagnetic noise\u00a0<a href=\"https:\/\/www.handashielding.com\/high-conductivity-emi-shielding-canted-coil-springs.html\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/li>\n<\/ul>\n\n\n\n<p><strong>Case Study<\/strong>: Stainless steel helical springs integrated into EV battery connectors achieved 30 dB reduction in radiated emissions, meeting CISPR 25 compliance standards with 500,000+ cycle durability&nbsp;<a href=\"https:\/\/www.handashielding.com\/high-conductivity-emi-shielding-canted-coil-springs.html\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Industrial and Consumer Electronics<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5909\u96fb\u8a2d\u5099<\/strong>: Protecting sensors in high-voltage environments<\/li>\n\n\n\n<li><strong>\u96fb\u6c17\u901a\u4fe1<\/strong>: Shielding in data centers and communication hardware<\/li>\n\n\n\n<li><strong>Consumer devices<\/strong>: Compact shielding for smartphones, wearables, and laptops\u00a0<a href=\"https:\/\/www.handaspring.com\/helical-seal-springs.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Installation and Design Considerations<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Proper Installation for Optimal Performance<\/h3>\n\n\n\n<p>For maximum EMI shielding effectiveness, follow these guidelines:<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>Ensure continuous contact<\/strong>: The spring should be compressed to achieve consistent contact with mating surfaces<\/li>\n\n\n\n<li><strong>Minimize gaps<\/strong>: Opposing ends should be separated by less than 5% of the spring length; welding ends together is recommended for critical applications\u00a0<a href=\"https:\/\/patents.justia.com\/patent\/20100224400\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/li>\n\n\n\n<li><strong>Match groove dimensions<\/strong>: Proper groove design ensures optimal compression and contact force<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">When to Weld Ends<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30fb\u30bf\u30a4\u30d7<\/th><th class=\"has-text-align-left\" data-align=\"left\">End Treatment Recommendation<\/th><\/tr><\/thead><tbody><tr><td>Mission-critical EMI sealing<\/td><td>Weld ends for continuous loop<\/td><\/tr><tr><td>General industrial<\/td><td>May leave small gap (&lt;5%)<\/td><\/tr><tr><td>High-vibration environments<\/td><td>Always weld ends<\/td><\/tr><tr><td>Prototype\/testing<\/td><td>Can test with gap, specify welded for production<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Design for Toroidal Applications<\/h3>\n\n\n\n<p>For curved installations where the spring forms a torus:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Inner diameter should be not less than 8 times the coil diameter<\/li>\n\n\n\n<li>This ensures proper geometry without excessive distortion\u00a0<a href=\"https:\/\/patents.justia.com\/patent\/20100224400\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">EMI Helical Spring vs. Canted Coil Spring<\/h2>\n\n\n\n<p>Both helical springs and canted coil springs offer EMI shielding capabilities, but they have distinct characteristics:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">\u7279\u5fb4<\/th><th class=\"has-text-align-left\" data-align=\"left\">EMI\u30d8\u30ea\u30ab\u30eb\u30b9\u30d7\u30ea\u30f3\u30b0<\/th><th class=\"has-text-align-left\" data-align=\"left\">\u30ab\u30f3\u30c8\u30fb\u30b3\u30a4\u30eb\u30fb\u30b9\u30d7\u30ea\u30f3\u30b0<\/th><\/tr><\/thead><tbody><tr><td><strong>Contact Pattern<\/strong><\/td><td>Continuous spiral contact<\/td><td>Multiple discrete contact points<\/td><\/tr><tr><td><strong>Typical Materials<\/strong><\/td><td>Stainless steel, copper alloys<\/td><td>Beryllium copper, stainless steel<\/td><\/tr><tr><td><strong>\u906e\u853d\u30e1\u30ab\u30cb\u30ba\u30e0<\/strong><\/td><td>Overlapping coils create continuous barrier<\/td><td>Multi-point contact ensures redundancy<\/td><\/tr><tr><td><strong>\u30d9\u30b9\u30c8\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3<\/strong><\/td><td>Enclosure sealing, gaskets<\/td><td>Connectors, dynamic interfaces<\/td><\/tr><tr><td><strong>Attenuation Range<\/strong><\/td><td>Up to -80 dB<\/td><td>86-165 dB (varies by design)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Both spring types are made from alloy components that offer excellent EMI shielding performance. With correct design and installation, they can block both electric and magnetic components of electromagnetic waves&nbsp;<a href=\"https:\/\/www.parjetseals.com\/en-US\/newsc22-emi-shielding-helical-spring-spiral-springs-and-canted-coil-spring\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Selection Guide: Choosing the Right EMI Helical Spring<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Step 1: Define Your Requirements<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">\u30d1\u30e9\u30e1\u30fc\u30bf<\/th><th class=\"has-text-align-left\" data-align=\"left\">Questions to Ask<\/th><\/tr><\/thead><tbody><tr><td><strong>\u5468\u6ce2\u6570\u7bc4\u56f2<\/strong><\/td><td>What frequencies need shielding? (1 MHz to 600 MHz typical)<\/td><\/tr><tr><td><strong>Attenuation Needed<\/strong><\/td><td>What dB reduction is required? (-70 dB to -80 dB achievable)<\/td><\/tr><tr><td><strong>\u74b0\u5883\u6761\u4ef6<\/strong><\/td><td>Temperature, humidity, chemical exposure?<\/td><\/tr><tr><td><strong>Mechanical Requirements<\/strong><\/td><td>Compression force, deflection range, cycle life?<\/td><\/tr><tr><td><strong>Space Constraints<\/strong><\/td><td>Available groove dimensions, installation envelope?<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Step 2: Select Material<\/h3>\n\n\n\n<p>Based on environmental factors&nbsp;<a href=\"https:\/\/www.handaspring.com\/helical-seal-springs.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><a href=\"https:\/\/www.parjetseals.com\/en-US\/newsc22-emi-shielding-helical-spring-spiral-springs-and-canted-coil-spring\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a>:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">\u74b0\u5883<\/th><th class=\"has-text-align-left\" data-align=\"left\">\u63a8\u5968\u7d20\u6750<\/th><\/tr><\/thead><tbody><tr><td>General purpose, cost-sensitive<\/td><td>Stainless steel (301\/316)<\/td><\/tr><tr><td>High conductivity needed<\/td><td>Beryllium copper or copper alloy<\/td><\/tr><tr><td>\u8150\u98df\u6027\u74b0\u5883<\/td><td>Hastelloy or plated stainless steel<\/td><\/tr><tr><td>High-temperature applications<\/td><td>Inconel or Elgiloy<\/td><\/tr><tr><td>Medical\/biocompatible<\/td><td>Gold-plated materials<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Step 3: Choose Design Configuration<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Overlap ratio<\/strong>: 20-40% overlap provides optimal balance of flexibility and shielding<\/li>\n\n\n\n<li><strong>Coil diameter<\/strong>: Should be less than 3\u00d7 ribbon width for compact designs<\/li>\n\n\n\n<li><strong>End treatment<\/strong>: Specify welded ends for critical applications<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Step 4: Verify Performance<\/h3>\n\n\n\n<p>Request test data including:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>DC resistance measurements<\/li>\n\n\n\n<li>Attenuation across frequency range<\/li>\n\n\n\n<li>Compressive load characteristics<\/li>\n\n\n\n<li>Cycle life test results<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion: The Versatile Choice for EMI Protection<\/h2>\n\n\n\n<p>EMI Helical Springs represent a proven, versatile solution for electromagnetic interference shielding across virtually every industry. Their unique combination of&nbsp;<strong>continuous conductive contact, mechanical resilience, and design flexibility<\/strong>&nbsp;makes them indispensable in applications where reliable shielding is critical&nbsp;<a href=\"https:\/\/www.handaspring.com\/helical-seal-springs.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><a href=\"https:\/\/www.parjetseals.com\/en-US\/newsc22-emi-shielding-helical-spring-spiral-springs-and-canted-coil-spring\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a>.<\/p>\n\n\n\n<p>From aerospace systems operating in extreme environments to medical devices requiring biocompatibility, and from electric vehicles to telecommunications infrastructure, EMI helical springs deliver the performance and reliability that modern electronics demand&nbsp;<a href=\"https:\/\/www.handashielding.com\/high-conductivity-emi-shielding-canted-coil-springs.html\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>.<\/p>\n\n\n\n<p>When properly selected and installed, these components provide:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Superior attenuation<\/strong>: Up to -80 dB reduction in electromagnetic interference<\/li>\n\n\n\n<li><strong>\u5e45\u5e83\u3044\u5468\u6ce2\u6570\u3092\u30ab\u30d0\u30fc<\/strong>: Consistent performance from 1 MHz to 600 MHz<\/li>\n\n\n\n<li><strong>Mechanical integrity<\/strong>: Maintains shielding under vibration and dynamic conditions<\/li>\n\n\n\n<li><strong>Long-term reliability<\/strong>: Proven performance in mission-critical applications\u00a0<\/li>\n<\/ul>\n\n\n\n<p><a href=\"https:\/\/www.handashielding.com\/request-a-quote.html\" data-type=\"link\" data-id=\"https:\/\/www.handashielding.com\/request-a-quote.html\">\u898b\u7a4d\u4f9d\u983c<\/a><\/p>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Discover how EMI Helical Springs (spiral springs) provide superior electromagnetic interference shielding. Learn about their design, materials, attenuation performance up to -80 dB, and applications in aerospace, medical, and electronics industries. Introduction: The Growing Challenge of Electromagnetic Interference In our increasingly connected world, electromagnetic interference (EMI) has become a pervasive challenge affecting everything from consumer electronics to mission-critical aerospace systems. EMI can result from both unintentional sources\u2014such as electrical wiring, thermal noise, and static discharges\u2014and intentional sources like radio signals, cellular networks, and wireless communication systems&nbsp;. The elimination of EMI is crucial in electronic system design. Placement of components, along with the use of shielding and filtering, makes it possible [&hellip;]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[19],"tags":[],"class_list":["post-3709","post","type-post","status-publish","format-standard","hentry","category-emi-helical-spring"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.handashielding.com\/ja\/wp-json\/wp\/v2\/posts\/3709","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.handashielding.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.handashielding.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.handashielding.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.handashielding.com\/ja\/wp-json\/wp\/v2\/comments?post=3709"}],"version-history":[{"count":2,"href":"https:\/\/www.handashielding.com\/ja\/wp-json\/wp\/v2\/posts\/3709\/revisions"}],"predecessor-version":[{"id":3711,"href":"https:\/\/www.handashielding.com\/ja\/wp-json\/wp\/v2\/posts\/3709\/revisions\/3711"}],"wp:attachment":[{"href":"https:\/\/www.handashielding.com\/ja\/wp-json\/wp\/v2\/media?parent=3709"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.handashielding.com\/ja\/wp-json\/wp\/v2\/categories?post=3709"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.handashielding.com\/ja\/wp-json\/wp\/v2\/tags?post=3709"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}