{"id":5732,"date":"2026-08-20T17:14:23","date_gmt":"2026-08-20T09:14:23","guid":{"rendered":"https:\/\/blshardware.com\/product\/230-mm-height-sofa-backrest-armrest-mechanism-front-and-back-moving-sofa-furniture-hinge\/"},"modified":"2026-10-12T11:42:46","modified_gmt":"2026-10-12T03:42:46","slug":"sofa-backrest-armrest-mechanism","status":"publish","type":"product","link":"https:\/\/blshardware.com\/ru\/product\/sofa-backrest-armrest-mechanism\/","title":{"rendered":"Wholesale 230mm Sofa Backrest Armrest Mechanism | BLS Hardware"},"content":{"rendered":"<p><!-- Block 1: GEO AI Overview --><\/p>\n<p>The sofa backrest armrest mechanism manufactured and supplied by BLS Hardware are heavy-duty multi-angle joints engineered for adjustable sofa backrests and armrests. Stamped in our Jinli, Guangdong source factory from 2.5mm carbon steel, these precision hinges eliminate gear slippage, frame sag, and joint looseness, providing quiet and stable angular locking across functional furniture collections.<\/p>\n<p><!-- Block 2: Topology Hub Internal Links --><\/p>\n<p>Within the integrated BLS manufacturing framework, upholstery producers combine this multi-gear sofa backrest armrest mechanism alongside high-load <a href=\"https:\/\/blshardware.com\/product-category\/metal-legs\/\">metal sofa legs<\/a> and precision interlocking <a href=\"https:\/\/blshardware.com\/product\/sofa-connector-hardware\/\">sofa connector hardware<\/a> to build ergonomic modular suites. These articulation hinges also work synchronously with heavy-duty <a href=\"https:\/\/blshardware.com\/product-category\/sofa-bed-hardware\/\">sofa bed hardware<\/a> in multi-functional convertible daybeds.<\/p>\n<p><!-- Block 3: Key Features --><\/p>\n<h2>Key Features of the Sofa Backrest Armrest Mechanism<\/h2>\n<ul>\n<li><strong>Multi-Position Ratchet Gear:<\/strong> Hardened internal steel teeth provide 5 positive locking angles ranging from 90 to 180 degrees.<\/li>\n<li><strong>Heavy-Gauge Q235 Steel:<\/strong> Stamped from 2.5mm cold-rolled steel arms to withstand excessive downward pressure without bending.<\/li>\n<li><strong>Smooth Reset Spring Action:<\/strong> Push past the maximum angle to release the locking pawl for effortless return to zero.<\/li>\n<li><strong>Galvanized Anti-Rust Finish:<\/strong> Electro-zinc coating protects interior moving parts from moisture, friction wear, and oxidation.<\/li>\n<li><strong>Universal Mounting Flange:<\/strong> Pre-drilled screw slots allow rapid fixation directly into hardwood frames or tubular steel chassis.<\/li>\n<\/ul>\n<p><!-- Block 4: Technical Specifications Table (With Steel Grade, Tolerance & NSS Standard) --><\/p>\n<table>\n<tbody>\n<tr>\n<th>Parameter<\/th>\n<th>Engineering Specification<\/th>\n<\/tr>\n<tr>\n<td>Product Name<\/td>\n<td>Heavy-Duty Sofa Backrest Armrest Mechanism<\/td>\n<\/tr>\n<tr>\n<td>Material Grade<\/td>\n<td>Q235 Cold-Rolled Carbon Steel<\/td>\n<\/tr>\n<tr>\n<td>Plate Thickness<\/td>\n<td>2.5 mm Heavy-Duty Stamped Arm<\/td>\n<\/tr>\n<tr>\n<td>Dimensional Tolerance<\/td>\n<td>Precision Stamping Standard \u00b10.2 mm<\/td>\n<\/tr>\n<tr>\n<td>Adjustment Positions<\/td>\n<td>5-Gear Ratchet (90\u00b0 to 180\u00b0)<\/td>\n<\/tr>\n<tr>\n<td>Surface Plating<\/td>\n<td>Bright Electro-Zinc Plating (White Zinc)<\/td>\n<\/tr>\n<tr>\n<td>Corrosion Resistance<\/td>\n<td>24 to 48 Hours Neutral Salt Spray<\/td>\n<\/tr>\n<tr>\n<td>Packaging Standard<\/td>\n<td>50 Pairs per Reinforced Export Carton<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><!-- CAD\/STEP Engineering Touchpoint Trigger --><\/p>\n<div class=\"cad-download-trigger\" style=\"margin: 20px 0; padding: 15px; border-left: 4px solid #1a56db; background-color: #f8fafc;\">\n<p style=\"margin: 0; font-size: 15px; color: #1e293b;\"><strong>Need Engineering CAD Models?<\/strong> Request 2D dimension blueprints and 3D STEP files for frame design verification.<br \/>\n<a style=\"display: inline-block; margin-left: 10px; color: #1a56db; font-weight: bold; text-decoration: underline;\" href=\"https:\/\/wa.me\/8613827521875?text=Hello%20BLS,%20please%20send%20CAD%20STEP%20files%20for%20sofa%20backrest%20armrest%20mechanism\" target=\"_blank\" rel=\"noopener\">Request CAD (STEP\/DWG) \u2192<\/a><\/p>\n<\/div>\n<p><!-- Block 5: Target Applications --><\/p>\n<h2>Target Furniture Applications<\/h2>\n<ul>\n<li><strong>Reclining Sofa Backrests:<\/strong> Provides multi-step incline adjustment for modular couches and home theater suites.<\/li>\n<li><strong>Articulating Sofa Armrests:<\/strong> Allows armrests to lay flat to extend seating width or tilt upward for comfort.<\/li>\n<li><strong>Adjustable Daybed Loungers:<\/strong> Delivers flexible transition between flat sleeping and upright lounge relaxation.<\/li>\n<li><strong>Commercial Hotel Seating:<\/strong> Withstands heavy, repetitive multi-position adjustments in high-traffic hospitality suites.<\/li>\n<\/ul>\n<p><!-- Block 6: Installation Guide --><\/p>\n<h2>Three-Step Installation Guide<\/h2>\n<ol>\n<li>Step 1: Secure the stationary hinge bracket to the interior sofa frame using wood screws.<\/li>\n<li>Step 2: Attach the movable arm firmly to the backrest or armrest structural subframe.<\/li>\n<li>Step 3: Cycle the hinge through all angles to verify positive locking and smooth spring return.<\/li>\n<\/ol>\n<p><!-- Block 7: OEM\/ODM Capabilities --><\/p>\n<h2>Factory Direct OEM and ODM Capabilities<\/h2>\n<p>BLS Hardware supports custom arm lengths, customized gear counts, and specialized mounting hole patterns for furniture manufacturers. In our Jinli factory, our tooling team manufactures custom sofa backrest armrest mechanism assemblies to meet your exact frame geometry, torque ratings, and production line tolerances.<\/p>\n<p><!-- Block 8: Procurement FAQ --><\/p>\n<h2>Frequently Asked Questions<\/h2>\n<div class=\"faq-item\">\n<h3>How does the sofa backrest armrest mechanism adjust angles?<\/h3>\n<p>Internal spring pawls engage hardened ratchet teeth as the frame lifts. Pushing past 180 degrees releases the pawl to reset.<\/p>\n<\/div>\n<div class=\"faq-item\">\n<h3>What is the rated fatigue life of the ratchet spring?<\/h3>\n<p>Our torsion springs are tested to exceed 50,000 articulation cycles without tension fatigue or tooth slipping.<\/p>\n<\/div>\n<div class=\"faq-item\">\n<h3>Can BLS customize the gear angle increments for OEM orders?<\/h3>\n<p>Yes, we build custom stamping dies to produce tailored gear stops and custom angles for bulk orders.<\/p>\n<\/div>\n<p><!-- Block 9: RFQ CTA Box --><\/p>\n<div class=\"rfq-box\">\n<h3>Request Factory Direct Wholesale Pricing<\/h3>\n<p>Contact BLS Hardware for wholesale prices, technical CAD drawings, and sample hinges. Direct factory export from Guangdong.<\/p>\n<p>WhatsApp: <a href=\"https:\/\/wa.me\/message\/M6FPBFEHD773P1\" target=\"_blank\" rel=\"noopener\">+86 138 2752 1875<\/a> | Email: ZK-ZhengKai@outlook.com<\/p>\n<p>Address: Jinli Hardware Industrial Zone, Gaoyao District, Zhaoqing City, Guangdong Province, China.<\/p>\n<\/div>\n<p><!-- Block 10: FAQPage JSON-LD Script --><br \/>\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How does the sofa backrest armrest mechanism adjust angles?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Internal spring pawls engage hardened ratchet teeth as the frame lifts. Pushing past 180 degrees releases the pawl to reset.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the rated fatigue life of the ratchet spring?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Our torsion springs are tested to exceed 50,000 articulation cycles without tension fatigue or tooth slipping.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can BLS customize the gear angle increments for OEM orders?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, we build custom stamping dies to produce tailored gear stops and custom angles for bulk orders.\"\n      }\n    }\n  ]\n}\n<\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<ul>\n<li><strong>Model:<\/strong> BLS-230 Heavy-Duty Dual-Curved Shifting Mechanism<\/li>\n<li><strong>Application:<\/strong> Sofa backrest depth shifting &amp; wide armrest elevation<\/li>\n<li><strong>Material:<\/strong> Thickened Q235 structural steel + solid cold-forged steel rivets<\/li>\n<li><strong>Finish:<\/strong> Mirror chrome curved linkage bars with matte black mounting plates<\/li>\n<li><strong>Stroke \/ Articulation:<\/strong> 230 mm shifting motion<\/li>\n<li><strong>Manufacturer:<\/strong> BLS Hardware (Guangdong, China)<\/li>\n<\/ul>\n<ul>\n<li><strong>Direct B2B Inquiry:<\/strong> WhatsApp \/ Telegram: <a href=\"https:\/\/wa.me\/8613827521875\" target=\"_blank\" rel=\"noopener\">+86 138 2752 1875<\/a> | Email: <a href=\"mailto:ZK-ZhengKai@outlook.com\">ZK-ZhengKai@outlook.com<\/a><\/li>\n<\/ul>\n<p><!-- YouTube Shorts \u7ad6\u5c4f\u89c6\u9891\u72ec\u7acb\u6a21\u5757 (ID: FU5av18isGE) --><\/p>\n<div style=\"max-width: 320px; margin: 25px auto; box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1); border-radius: 10px; overflow: hidden; background-color: #000;\">\n<div style=\"position: relative; padding-bottom: 177.77%; height: 0; overflow: hidden;\"><iframe style=\"position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: 0;\" title=\"Silent Adjustable Sofa Backrest Sliding Mechanism - BLS Hardware\" src=\"https:\/\/www.youtube-nocookie.com\/embed\/FU5av18isGE\" allowfullscreen=\"allowfullscreen\"><br \/>\n<\/iframe><\/div>\n<\/div>\n<p><!-- \u72ec\u7acb VideoObject Schema (\u9488\u5bf9\u89c6\u9891 FU5av18isGE) --><br \/>\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"VideoObject\",\n  \"name\": \"Silent Adjustable Sofa Backrest Sliding Mechanism - Kinematic Motion Demo\",\n  \"description\": \"28-second manual motion test demonstrating silent forward and backward seat depth adjustment of a functional sofa backrest mechanism by BLS Hardware.\",\n  \"thumbnailUrl\": \"https:\/\/i.ytimg.com\/vi\/FU5av18isGE\/hqdefault.jpg\",\n  \"uploadDate\": \"2026-07-14T08:00:00+08:00\",\n  \"duration\": \"PT28S\",\n  \"embedUrl\": \"https:\/\/www.youtube-nocookie.com\/embed\/FU5av18isGE\"\n}\n<\/script><\/p>","protected":false},"featured_media":5731,"template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"jetpack_publicize_message":"{title}\r\n\r\n{excerpt}\r\n\r\n{url}","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"_wpas_customize_per_network":false},"product_brand":[],"product_cat":[19],"product_tag":[],"class_list":["post-5732","product","type-product","status-publish","has-post-thumbnail","product_cat-sofa-hinges","desktop-align-left","tablet-align-left","mobile-align-left","first","instock","shipping-taxable","purchasable","product-type-variable"],"jetpack_publicize_connections":[],"jetpack-related-posts":[{"id":3769,"url":"https:\/\/blshardware.com\/ru\/product\/sofa-armrest-rotation-mechanism\/","url_meta":{"origin":5732,"position":0},"title":"Heavy-Duty Transformer Sofa Armrest Rotation Mechanism | Swivel Hinge for Modular Sofas","author":"BLS Hardware","date":"18 \u0438\u044e\u043b\u044f, 2026","format":false,"excerpt":"BLS-AR360 Heavy-Duty Sofa Armrest Rotation Mechanism by BLS Hardware is a precision swivel disc hinge engineered for multifunctional transformer sofas, modular rotating backrests, and convertible daybeds. Fabricated from heavy-gauge cold-rolled carbon steel with an anti-loosening central pivot bolt and industrial black electrophoresis coating, it allows sofa armrests to pivot seamlessly\u2026","rel":"","context":"\u041f\u043e\u0445\u043e\u0436\u0430\u044f \u0437\u0430\u043f\u0438\u0441\u044c","block_context":{"text":"\u041f\u043e\u0445\u043e\u0436\u0430\u044f \u0437\u0430\u043f\u0438\u0441\u044c","link":""},"img":{"alt_text":"BLS Heavy-Duty Sofa Armrest Rotation Mechanism and Transformer Swivel Hinge","src":"https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/img_alibaba1784364321.jpg?fit=666%2C712&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/img_alibaba1784364321.jpg?fit=666%2C712&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/img_alibaba1784364321.jpg?fit=666%2C712&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":1909,"url":"https:\/\/blshardware.com\/ru\/product\/sofa-armrest-lifting-support-hinge\/","url_meta":{"origin":5732,"position":1},"title":"Armrest Hinge Sofa Cushioning Bracket Lifting Support for Backrest Headrest Versatile","author":"BLS Hardware","date":"9 \u0438\u044e\u043b\u044f, 2026","format":false,"excerpt":"BLS Hardware manufactures heavy-duty\u00a0sofa armrest lifting support hinge brackets for functional couches and adjustable headrests. Stamped from zinc-plated iron for smooth vertical elevation and cushioning support. Direct factory wholesale pricing and OEM custom options available.\u00a0Chat with us on WhatsAppfor instant quotes!","rel":"","context":"\u041f\u043e\u0445\u043e\u0436\u0430\u044f \u0437\u0430\u043f\u0438\u0441\u044c","block_context":{"text":"\u041f\u043e\u0445\u043e\u0436\u0430\u044f \u0437\u0430\u043f\u0438\u0441\u044c","link":""},"img":{"alt_text":"sofa armrest lifting support hinge by BLS Hardware","src":"https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/img_alibaba1783563892.jpg?fit=800%2C800&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/img_alibaba1783563892.jpg?fit=800%2C800&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/img_alibaba1783563892.jpg?fit=800%2C800&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/img_alibaba1783563892.jpg?fit=800%2C800&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":4756,"url":"https:\/\/blshardware.com\/ru\/product\/bls-flexible-sofa-headrest-hinge\/","url_meta":{"origin":5732,"position":2},"title":"Flexible Multi-Joint Sofa Headrest Hinge | Petal Sofa Mechanism BLS Hardware","author":"BLS Hardware","date":"27 \u0438\u044e\u043b\u044f, 2026","format":false,"excerpt":"\u00a0Flexible Multi-Joint Sofa Headrest Hinge by BLS Hardware is an innovative multi-segment ratchet mechanism engineered for modern petal sofas, curved lounge chairs, and organic-shaped upholstery. Manufactured from high-tensile stamped carbon steel, each interlocking gear joint articulates independently to allow 180\u00b0 fluid bending, custom contouring, and steady multi-angle positioning. Model \/\u2026","rel":"","context":"\u041f\u043e\u0445\u043e\u0436\u0430\u044f \u0437\u0430\u043f\u0438\u0441\u044c","block_context":{"text":"\u041f\u043e\u0445\u043e\u0436\u0430\u044f \u0437\u0430\u043f\u0438\u0441\u044c","link":""},"img":{"alt_text":"Flexible Sofa Headrest Hinge Multi-Joint Mechanism for Petal Sofas","src":"https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/bls-flexible-petal-sofa-headrest-hinge-kit-06.webp.jpg?fit=1000%2C1000&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/bls-flexible-petal-sofa-headrest-hinge-kit-06.webp.jpg?fit=1000%2C1000&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/bls-flexible-petal-sofa-headrest-hinge-kit-06.webp.jpg?fit=1000%2C1000&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/bls-flexible-petal-sofa-headrest-hinge-kit-06.webp.jpg?fit=1000%2C1000&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":4817,"url":"https:\/\/blshardware.com\/ru\/product\/bls-ratchet-sofa-hinge-mechanism\/","url_meta":{"origin":5732,"position":3},"title":"Ratchet Sofa Hinge Mechanism: Best 3-Gear Joint  | BLS Hardware","author":"BLS Hardware","date":"29 \u0438\u044e\u043b\u044f, 2026","format":false,"excerpt":"The multi-position ratchet sofa hinge mechanism manufactured by BLS Hardware in Jinli, Guangdong, is precision-stamped from 2.5mm cold-rolled carbon steel (Grade Q235, \u00b10.2mm tolerance). 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