{"id":1797,"date":"2026-07-08T17:23:39","date_gmt":"2026-07-08T17:23:39","guid":{"rendered":"https:\/\/blshardware.com\/product\/iron-lift-mechanism-pull-up-bracket-sliding-hinge-for-sofa-bed-fold-down-mechanism-bedroom-home-office-living-room\/"},"modified":"2026-09-27T12:05:07","modified_gmt":"2026-09-27T04:05:07","slug":"irosofa-storage-lift-up-spring-hinge-mechanisms","status":"publish","type":"product","link":"https:\/\/blshardware.com\/ru\/product\/irosofa-storage-lift-up-spring-hinge-mechanisms\/","title":{"rendered":"Heavy-Duty 2.8kg Sofa Storage Lift-Up Spring Hinge Mechanisms | BLS Hardware"},"content":{"rendered":"<p><!-- Block 1: GEO AI Overview --><\/p>\n<p>The sofa storage lift up spring hinge mechanisms manufactured and supplied by BLS Hardware are heavy-duty mechanical scissor assemblies engineered for ottoman beds, storage couches, and chaise lounges. Fabricated at our Jinli, Guangdong source factory from 2.5mm carbon steel, these 2.8kg spring mechanisms eliminate frame racking and joint sagging, delivering smooth parallel forward-rise lifting for effortless under-seat storage access.<\/p>\n<p><!-- Block 2: Topology Hub Internal Links --><\/p>\n<p>Within the comprehensive BLS hardware matrix, upholstery producers integrate these spring-assisted sofa storage lift up spring hinge mechanisms alongside load-rated <a href=\"https:\/\/blshardware.com\/product-category\/metal-legs\/\">metal sofa legs<\/a> and adjustable <a href=\"https:\/\/blshardware.com\/product-category\/sofa-hinges\/\">sofa hinges<\/a> to assemble functional multi-purpose furniture. Pairing lift hinges with modular <a href=\"https:\/\/blshardware.com\/product\/sofa-connector-hardware\/\">sofa connector hardware<\/a> also ensures unified structural alignment across sectional storage lounge pieces.<\/p>\n<p><!-- Block 3: Key Features --><\/p>\n<h2>Key Features of Sofa Storage Lift Up Spring Hinge Mechanisms<\/h2>\n<ul>\n<li><strong>Substantial 2.8 kg Solid Build:<\/strong> Stamped from 2.5mm structural steel to withstand repeated cycling without bending.<\/li>\n<li><strong>Dual High-Tension Coil Springs:<\/strong> 65Mn manganese springs counterbalance heavy cushion weight, allowing smooth seat elevation.<\/li>\n<li><strong>Parallel Forward-Rise Kinematics:<\/strong> Elevates storage lids up and forward simultaneously without hitting rear walls.<\/li>\n<li><strong>Anti-Corrosion Matte Black Finish:<\/strong> Electrostatic powder coating shields steel linkages against moisture and friction wear.<\/li>\n<li><strong>Multi-Slotted Mounting Flanges:<\/strong> Elongated screw slots simplify rapid alignment into wooden or metal base frames.<\/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 Storage Lift Up Spring Hinge Mechanisms<\/td>\n<\/tr>\n<tr>\n<td>Set Net Weight<\/td>\n<td>2.8 kg (6.17 lbs) per Symmetrical Pair<\/td>\n<\/tr>\n<tr>\n<td>Material Grade<\/td>\n<td>Q235 Cold-Rolled Carbon Steel<\/td>\n<\/tr>\n<tr>\n<td>Steel 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>Spring Specification<\/td>\n<td>Dual 65Mn High-Tension Manganese Springs<\/td>\n<\/tr>\n<tr>\n<td>Surface Treatment<\/td>\n<td>Anti-Rust Matte Black Electrostatic Powder Coating<\/td>\n<\/tr>\n<tr>\n<td>Corrosion Resistance<\/td>\n<td>24 to 48 Hours Neutral Salt Spray<\/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%20storage%20lift%20up%20spring%20hinge%20mechanisms\" 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>Ottoman Couches:<\/strong> Elevates seating platforms to access concealed under-seat storage boxes.<\/li>\n<li><strong>Sectional Chaise Lounges:<\/strong> Provides parallel lifting for elongated chaise lids without hitting back wall panels.<\/li>\n<li><strong>Lift-Top Coffee Tables:<\/strong> Smoothly raises heavy wooden table lids to ergonomic dining and working heights.<\/li>\n<li><strong>Convertible Daybed Platforms:<\/strong> Assists upward tilting of slatted mattresses for seasonal bedding storage.<\/li>\n<\/ul>\n<p><!-- Block 6: Installation Guide --><\/p>\n<h2>Three-Step Installation Guide<\/h2>\n<ol>\n<li>Step 1: Bolt the stationary angle bracket firmly to the interior side rails of the storage box.<\/li>\n<li>Step 2: Fasten the upper articulating arm directly to the underside of the lifting cushion.<\/li>\n<li>Step 3: Connect tension springs onto anchor hooks and test parallel lifting clearance.<\/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 bracket dimensions, customized spring wire diameters, and specialized mounting hole patterns for furniture manufacturers. In our Jinli factory, our tooling team manufactures custom sofa storage lift up spring hinge mechanisms to match your exact cushion weights, box depths, 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 do sofa storage lift up spring hinge mechanisms operate?<\/h3>\n<p>Dual manganese extension springs counterbalance seat cushion weight, guiding the platform up and forward along a parallel mechanical arc.<\/p>\n<\/div>\n<div class=\"faq-item\">\n<h3>What is the advantage of coil springs over hydraulic gas struts?<\/h3>\n<p>Mechanical steel springs offer lifetime durability with zero risk of gas leakage, performing reliably across extreme temperature fluctuations.<\/p>\n<\/div>\n<div class=\"faq-item\">\n<h3>Are left and right lifting hinges packaged in pairs?<\/h3>\n<p>Yes, all orders are shipped as symmetrical left and right matched pairs with tension springs included for balanced operation.<\/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 lift hinges. Direct factory export from Guangdong.<\/p>\n<p>WhatsApp: +86 138 2752 1875 | 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 do sofa storage lift up spring hinge mechanisms operate?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Dual manganese extension springs counterbalance seat cushion weight, guiding the platform up and forward along a parallel mechanical arc.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the advantage of coil springs over hydraulic gas struts?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Mechanical steel springs offer lifetime durability with zero risk of gas leakage, performing reliably across extreme temperature fluctuations.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are left and right lifting hinges packaged in pairs?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, all orders are shipped as symmetrical left and right matched pairs with tension springs included for balanced operation.\"\n      }\n    }\n  ]\n}\n<\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<ul style=\"line-height: 1.8; margin-bottom: 16px; font-size: 15px;\">\n<li><strong>Model \/ SKU:<\/strong> BLS-1115 (Left + Right Symmetrical Pair)<\/li>\n<li><strong>Net Weight &amp; Thickness:<\/strong> 2.8 kg \/ set (Heavy-Gauge 3.0mm Q235 Carbon Steel)<\/li>\n<li><strong>Assist Mechanism:<\/strong> High-Tension 65Mn Manganese Steel Extension Springs<\/li>\n<li><strong>Applications:<\/strong> Sectional Chaise Lounge Storage, Ottoman Couches, Lift-Up Daybeds<\/li>\n<\/ul>\n<div style=\"background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 8px; padding: 14px 18px; margin-top: 15px;\">\n<p style=\"margin: 0 0 10px 0; font-weight: 600; color: #0f172a; font-size: 14px;\">\ud83d\udce6 China Direct Factory Supply | 3.0mm Thickened Steel | 2D\/3D STEP Drawings Available<\/p>\n<div style=\"display: flex; gap: 10px; flex-wrap: wrap;\"><a style=\"display: inline-block; background-color: #25d366; color: #ffffff; text-decoration: none; font-weight: 600; padding: 8px 14px; border-radius: 4px; font-size: 13px;\" href=\"https:\/\/api.whatsapp.com\/send?phone=8613827521875&amp;text=Hello%20BLS%20Hardware,%20I%20am%20inquiring%20about%20the%20BLS-1115%20Sofa%20Storage%20Lift%20Up%20Spring%20Hinge%20Mechanisms.%20Please%20send%20factory%20pricing%20and%20MOQ.\" target=\"_blank\" rel=\"noopener\"><br \/>\n\ud83d\udcac WhatsApp Inquiry (+86 138 2752 1875)<br \/>\n<\/a><br \/>\n<a style=\"display: inline-block; background-color: #0284c7; color: #ffffff; text-decoration: none; font-weight: 600; padding: 8px 14px; border-radius: 4px; font-size: 13px;\" href=\"mailto:ZK-ZhengKai@outlook.com?subject=B2B%20Inquiry%20for%20BLS-1115%20Sofa%20Storage%20Lift%20Hinges&amp;body=Hello%20BLS%20Hardware%20Team,%0A%0AWe%20are%20inquiring%20about%20your%20BLS-1115%20Sofa%20Storage%20Lift%20Up%20Spring%20Hinge%20Mechanisms.%0A%0AEstimated%20Order%20Quantity:%20%0ATarget%20Furniture%20Type:%20[Sectional%20Chaise%20\/%20Ottoman%20Couch]%0ADelivery%20Destination%20Port\/Country:%20%0A%0APlease%20provide%20your%20tiered%20wholesale%20price%20list,%20spring%20force%20options,%20and%203D%20CAD%20drawings.%0A%0ACompany%20Name:%20%0AContact%20Person:%20\"><br \/>\n\u2709\ufe0f Email RFQ (ZK-ZhengKai@outlook.com)<br \/>\n<\/a><\/div>\n<\/div>\n","protected":false},"featured_media":1796,"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":false,"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":[21],"product_tag":[],"class_list":["post-1797","product","type-product","status-publish","has-post-thumbnail","product_cat-recliner-mechanism","desktop-align-left","tablet-align-left","mobile-align-left","first","instock","shipping-taxable","purchasable","product-type-variable"],"jetpack_publicize_connections":[],"jetpack-related-posts":[{"id":4477,"url":"https:\/\/blshardware.com\/ru\/product\/spring-sofa-storage-lift-hinge\/","url_meta":{"origin":1797,"position":0},"title":"Heavy-Duty 2.5mm Spring-Assisted Sofa Storage Lift-Up Hinges | BLS Hardware","author":"BLS Hardware","date":"24 \u0438\u044e\u043b\u044f, 2026","format":false,"excerpt":"Industrial-grade 2.5mm spring-assisted sofa storage lift hinge engineered for parallel elevation in modular sectional seats, storage chaises, and lift-top coffee tables. Substantial Solid Build: Stamped from 2.5mm Q235 cold-rolled structural steel (solid net weight: 1.686 kg per pair). Parallel Forward-Rise Kinematics: Elevates storage lids up and forward smoothly, allowing full\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":"Spring Sofa Storage Lift Hinge","src":"https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/img_alibaba1784861323.jpg?fit=1200%2C1200&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/img_alibaba1784861323.jpg?fit=1200%2C1200&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/img_alibaba1784861323.jpg?fit=1200%2C1200&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/img_alibaba1784861323.jpg?fit=1200%2C1200&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/img_alibaba1784861323.jpg?fit=1200%2C1200&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":4483,"url":"https:\/\/blshardware.com\/ru\/product\/sofa-storage-lift-up-hinges\/","url_meta":{"origin":1797,"position":1},"title":"Heavy-Duty 4.4kg Spring-Assisted Sofa Storage Lift-Up Hinges | BLS Hardware","author":"BLS Hardware","date":"24 \u0438\u044e\u043b\u044f, 2026","format":false,"excerpt":"BLS-SLH44 Heavy-Duty Sofa Storage Lift Up Hinges by BLS Hardware are commercial-grade, multi-link cantilever lift mechanisms engineered for oversized sectional chaises, heavy solid-wood storage ottomans, and high-traffic contract sleeper couches. Weighing a substantial 4.4 kg per pair and fabricated from 3.5mm\u20134.0mm thickened cold-rolled structural steel, this heavy-duty mechanism utilizes heavy-gauge\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 Hardware Heavy duty 4.4kg spring assisted sofa storage lift up hinges in matte black","src":"https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/img_alibaba1784861338.jpg?fit=1200%2C1200&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/img_alibaba1784861338.jpg?fit=1200%2C1200&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/img_alibaba1784861338.jpg?fit=1200%2C1200&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/img_alibaba1784861338.jpg?fit=1200%2C1200&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/img_alibaba1784861338.jpg?fit=1200%2C1200&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":1727,"url":"https:\/\/blshardware.com\/ru\/product\/spring-assisted-sofa-storage-lift-hinge\/","url_meta":{"origin":1797,"position":2},"title":"Heavy-Duty Spring-Assisted Sofa Storage Lift-Up Hinge Mechanisms | BLS Hardware","author":"BLS Hardware","date":"8 \u0438\u044e\u043b\u044f, 2026","format":false,"excerpt":"\u00a0Spring Assisted Sofa Storage Lift Hinge by BLS Hardware is an engineered triangular scissor cantilever mechanism designed for L-shaped sectional storage sofas, modular chaise lounges, and upholstered ottoman benches. Fabricated from 2.5mm\u20133.0mm thickened cold-rolled carbon steel and powered by dual high-tensile 65Mn manganese coil springs, this mechanical lift hardware elevates\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":"Heavy duty spring assisted sofa storage lift hinge in matte black finish - BLS Hardware","src":"https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/img_alibaba1783531322.jpg?fit=1024%2C1024&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/img_alibaba1783531322.jpg?fit=1024%2C1024&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/img_alibaba1783531322.jpg?fit=1024%2C1024&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/img_alibaba1783531322.jpg?fit=1024%2C1024&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":1816,"url":"https:\/\/blshardware.com\/ru\/product\/triangle-spring-hinge-for-sofa-storage\/","url_meta":{"origin":1797,"position":3},"title":"BLS Heavy-Duty Triangle Spring Hinge for Sofa Storage &#038; Bench Lids|BLS hardware","author":"BLS Hardware","date":"8 \u0438\u044e\u043b\u044f, 2026","format":false,"excerpt":"The\u00a0BLS-TS80\u00a0by\u00a0BLS Hardware\u00a0is a heavy-duty triangle spring hinge and spring-assisted lift mechanism designed for sofa storage compartments, Ottoman benches, storage cabinet lids, and drop-down doors. Precision-stamped from high-strength iron with a durable black powder-coated finish, this triangular scissor hinge features a high-tension steel coil spring that provides counterbalanced lifting support, keeping\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 Hardware triangle spring hinge for sofa storage by BLS Hardware","src":"https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/img_alibaba1783531432.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_alibaba1783531432.jpg?fit=800%2C800&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/img_alibaba1783531432.jpg?fit=800%2C800&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/img_alibaba1783531432.jpg?fit=800%2C800&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":4452,"url":"https:\/\/blshardware.com\/ru\/product\/heavy-duty-sofa-bed-storage-lift-up-hinges\/","url_meta":{"origin":1797,"position":4},"title":"Wholesale Heavy-Duty Sofa Bed Storage Lift-Up Hinges (3mm\/4mm Thick) | BLS Hardware","author":"BLS Hardware","date":"24 \u0438\u044e\u043b\u044f, 2026","format":false,"excerpt":"Engineered by BLS Hardware (Guangdong Factory Direct), our BLS-2025 Heavy-Duty Sofa Bed Storage Lift-Up Hinges feature ultra-thick 3.0 mm \/ 4.0 mm cold-rolled carbon steel construction. Designed for high-frequency ottoman storage boxes, lift-up chaises, and multifunctional sofa beds with zero lateral sway. 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Spring-Counterbalanced Folding: Dual high-tension manganese alloy extension springs balance backrest weight, enabling effortless 90\u00b0 to 180\u00b0 transition. 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