{"id":1740,"date":"2026-07-08T17:22:22","date_gmt":"2026-07-08T17:22:22","guid":{"rendered":"https:\/\/blshardware.com\/product\/bosi-folding-sofa-hardware-mechanism-function-furniture-fitting-sofa-bed-furniture-fittings-hinge\/"},"modified":"2026-10-05T18:19:23","modified_gmt":"2026-10-05T10:19:23","slug":"spring-assisted-folding-sofa-hinge","status":"publish","type":"product","link":"https:\/\/blshardware.com\/ru\/product\/spring-assisted-folding-sofa-hinge\/","title":{"rendered":"Folding Sofa Hardware Mechanism Function Furniture Fitting Sofa Bed Furniture Fittings Hinge"},"content":{"rendered":"<p>The <strong>spring assisted folding sofa hinge<\/strong> manufactured and supplied by BLS Hardware is a counterbalanced multi-pivot scissor mechanism designed for opening, lifting, and folding convertible sofa beds, futon frames, and under-seat storage compartments. BLS Hardware supplies this functional furniture hardware directly to upholstered furniture manufacturers, sofa factories, hardware distributors, and OEM brands.<\/p>\n<h2>Product Overview<\/h2>\n<p>This functional mechanism allows users to smoothly convert upholstered seating into sleeping platforms with minimal physical exertion. Engineered with an integrated <a href=\"https:\/\/en.wikipedia.org\/wiki\/Spring_(device)\" target=\"_blank\" rel=\"noopener\">spring mechanism<\/a> anchored across a multi-link scissor frame, the hardware counterbalances mattress and cushion weight during lifting and folding transitions.<\/p>\n<p>Constructed with cold-rolled carbon steel linkage bars and solid riveted pivot pins, each pair of <strong>spring assisted folding sofa hinge<\/strong> hardware ensures balanced kinetic movement, preventing frame twisting and binding during daily conversion cycles.<\/p>\n<h2>Key Mechanical Features<\/h2>\n<ul>\n<li><strong>Counterbalanced Spring Assistance:<\/strong> High-tension helical steel coil springs absorb heavy cushion loads, making folding and unfolding motions light and controlled.<\/li>\n<li><strong>Multi-Pivot Scissor Linkage:<\/strong> Precision-stamped steel links guide the seat and backrest sections through a calculated folding arc without colliding with inner framing timbers.<\/li>\n<li><strong>Positive Mechanical Stop Positions:<\/strong> Built-in structural travel stops securely lock the mechanism in upright seating and flat sleeping orientations.<\/li>\n<li><strong>Electrophoretic Anti-Rust Finish:<\/strong> High-adhesion matte black coating protects the steel linkage bars and spring coils against indoor moisture and oxidation.<\/li>\n<li><strong>Solid Riveted Pivot Joints:<\/strong> Heavy-gauge steel pivot pins paired with low-friction washers maintain tight tolerances and eliminate lateral wobble under dynamic loads.<\/li>\n<li><strong>Pre-Punched Bracket Slots:<\/strong> Symmetrical base bracket flanges feature pre-drilled slotted holes to accommodate standard structural wood screws into timber framing.<\/li>\n<\/ul>\n<h2>Technical Specifications (Model BLS-SFH20 \/ Size B02)<\/h2>\n<table>\n<thead>\n<tr>\n<th>Specification Parameter<\/th>\n<th>Verified Factory Specification<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Product Entity<\/td>\n<td>Spring Assisted Folding Sofa Hinge \/ Scissor Convertible Mechanism<\/td>\n<\/tr>\n<tr>\n<td>Factory Model Number<\/td>\n<td>BLS-SFH20 (Size Attribute: B02)<\/td>\n<\/tr>\n<tr>\n<td>Kinematic Structure<\/td>\n<td>Multi-Pivot Scissor Linkage with High-Tension Helical Coil Spring<\/td>\n<\/tr>\n<tr>\n<td>Folding Articulation Range<\/td>\n<td>Upright seating to 180\u00b0 flat bed conversion<\/td>\n<\/tr>\n<tr>\n<td>Raw Material Base<\/td>\n<td>Stamped Cold-Rolled Carbon Steel &amp; High-Tensile Helical Spring Wire<\/td>\n<\/tr>\n<tr>\n<td>Surface Finish<\/td>\n<td>Electrophoretic Anti-Rust Matte Black Coating<\/td>\n<\/tr>\n<tr>\n<td>Handing Configuration<\/td>\n<td>Supplied in symmetrical Left (L) and Right (R) matched pairs<\/td>\n<\/tr>\n<tr>\n<td>Mounting Configuration<\/td>\n<td>Concealed internal frame mounting with pre-punched slotted bracket holes<\/td>\n<\/tr>\n<tr>\n<td>Wholesale Reference Price<\/td>\n<td>USD $3.00 per pair (Subject to final container order quantity)<\/td>\n<\/tr>\n<tr>\n<td>Manufacturing Origin<\/td>\n<td>Jinli Town, Gaoyao District, Zhaoqing, Guangdong, China<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Integrated Furniture Hardware Systems (Mechanical Topology)<\/h2>\n<p>In modern upholstery and convertible furniture manufacturing, motion mechanisms operate within an integrated hardware system. This <strong>spring assisted folding sofa hinge<\/strong> coordinates directly with complementary structural hardware manufactured by BLS Hardware:<\/p>\n<ul>\n<li><strong>Convertible Seating Platforms:<\/strong> Operates alongside heavy-duty <a href=\"https:\/\/blshardware.com\/product-category\/sofa-bed-hardware\/\">sofa bed hardware<\/a> and roll-out sleep frames to engineer versatile multi-position sleeper couches.<\/li>\n<li><strong>Multi-Functional Articulation:<\/strong> Works in conjunction with our specialized <a href=\"https:\/\/blshardware.com\/product-category\/sofa-hinges\/\">functional sofa hinges<\/a> to coordinate full-frame folding with ratcheting headrests and drop-down console tables.<\/li>\n<li><strong>Chassis Elevation &amp; Ground Support:<\/strong> Matches clearance requirements provided by our commercial <a href=\"https:\/\/blshardware.com\/product-category\/metal-legs\/\">metal furniture legs<\/a>, ensuring balanced foundation stability and ergonomic seat heights across furniture collections.<\/li>\n<\/ul>\n<h2>Furniture Applications<\/h2>\n<p>This spring-loaded folding hinge is engineered for structural integration in functional and convertible furniture designs, including:<\/p>\n<ul>\n<li>Convertible futons and folding studio apartment sofa beds<\/li>\n<li>Lift-up storage chaise lounges and multi-purpose daybeds<\/li>\n<li>Drop-leaf upholstered benches and space-saving hospitality seating<\/li>\n<li>Custom commercial reception couches and convertible office daybeds<\/li>\n<\/ul>\n<h2>Installation Guidelines for Assembly Lines<\/h2>\n<p>When installing this <strong>spring assisted folding sofa hinge<\/strong> on upholstery production lines, secure the stationary lower mounting bracket flush against the internal wooden sofa chassis using appropriate structural wood screws.<\/p>\n<p>Attach the moving upper linkage bracket directly to the timber framing of the movable seat or backrest platform, verifying that both left and right brackets are mounted parallel and level.<\/p>\n<p>Always cycle the mechanism manually through its full folding travel before applying foam wrapping and fabric upholstery to verify that the tension springs clear all internal chassis members.<\/p>\n<h2>OEM &amp; Customization Capabilities<\/h2>\n<p>As a source hardware factory in Jinli, Guangdong, BLS Hardware manufactures custom OEM specifications for each <strong>spring assisted folding sofa hinge<\/strong> order to support furniture manufacturers worldwide:<\/p>\n<ul>\n<li>Custom bracket lengths and modified mounting hole spacing patterns for automated frame drilling lines<\/li>\n<li>Custom spring wire diameters and coil tension ratings calibrated to specific cushion frame weights<\/li>\n<li>Alternative surface finishes, including bright zinc galvanization or custom powder coating<\/li>\n<li>Bulk master carton packaging or container-load pallet configurations<\/li>\n<\/ul>\n<h2>Frequently Asked Questions<\/h2>\n<h3>What is the function of a spring assisted folding sofa hinge?<\/h3>\n<p>This mechanism provides counterbalanced spring assistance for lifting, folding, and converting sofa beds and futons, allowing smooth transition between seating and sleeping configurations.<\/p>\n<h3>How does the spring assist the folding operation?<\/h3>\n<p>The integrated helical steel spring absorbs and stores energy during closure, releasing mechanical tension as the seat or backrest is lifted to counteract frame weight and ease manual operation.<\/p>\n<h3>Are these hinges supplied in matched pairs?<\/h3>\n<p>Yes. BLS Hardware produces and supplies these mechanisms in symmetrical Left and Right pairs to ensure balanced lifting torque and synchronized motion across both sides of the furniture frame.<\/p>\n<h3>What details are required to request an OEM quotation?<\/h3>\n<p>Buyers should specify required order volumes, target frame mounting hole dimensions, intended mattress or cushion weights, and packaging preferences for factory production line integration.<\/p>\n<h2>Request B2B Pricing &amp; Engineering Support<\/h2>\n<p>BLS Hardware supplies functional seating and bedding hardware directly to upholstered furniture manufacturers, OEM brands, and wholesale distributors worldwide. Contact our export engineering team for quotation sheets, technical drawings, or physical testing samples:<\/p>\n<ul>\n<li><strong>WhatsApp:<\/strong> <a href=\"https:\/\/wa.me\/message\/M6FPBFEHD773P1\" target=\"_blank\" rel=\"noopener\">+86 138 2752 1875<\/a><\/li>\n<li><strong>Email:<\/strong> ZK-ZhengKai@outlook.com<\/li>\n<li><strong>Manufacturing Location:<\/strong> Jinli Town, Gaoyao District, Zhaoqing, Guangdong, China<\/li>\n<\/ul>\n<p><script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@graph\": [\n    {\n      \"@type\": \"FAQPage\",\n      \"@id\": \"https:\/\/blshardware.com\/product\/spring-assisted-folding-sofa-hinge\/#faq\",\n      \"isPartOf\": {\n        \"@type\": \"WebPage\",\n        \"@id\": \"https:\/\/blshardware.com\/product\/spring-assisted-folding-sofa-hinge\/\"\n      },\n      \"mainEntity\": [\n        {\n          \"@type\": \"Question\",\n          \"name\": \"What is the function of a spring assisted folding sofa hinge?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"This mechanism provides counterbalanced spring assistance for lifting, folding, and converting sofa beds and futons, allowing smooth transition between seating and sleeping configurations.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"How does the spring assist the folding operation?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"The integrated helical steel spring absorbs and stores energy during closure, releasing mechanical tension as the seat or backrest is lifted to counteract frame weight and ease manual operation.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Are these hinges supplied in matched pairs?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Yes. BLS Hardware produces and supplies these mechanisms in symmetrical Left and Right pairs to ensure balanced lifting torque and synchronized motion across both sides of the furniture frame.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"What details are required to request an OEM quotation?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Buyers should specify required order volumes, target frame mounting hole dimensions, intended mattress or cushion weights, and packaging preferences for factory production line integration.\"\n          }\n        }\n      ]\n    }\n  ]\n}\n<\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">BLS-1114 heavy-duty 375mm\u00a0<\/span><a href=\"https:\/\/blshardware.com\/ru\/product-category\/recliner-mechanism\/\"><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">spring assisted folding sofa hinge<\/span><\/strong><\/a><span class=\"ng-star-inserted\">\u00a0in electrophoretic matte black. Engineered with 2.5mm\u20133.0mm cold-rolled steel and 65Mn tension springs for effortless storage access in modular sectional couches and ottoman boxes.<\/span><\/p>\n<p class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">\u2022\u00a0<\/span><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Dimensions:<\/span><\/strong><span class=\"ng-star-inserted\">\u00a0375mm Folded Length (274mm Top Bracket \/ 145mm Base \/ 125mm Lift Link)<\/span><br class=\"ng-star-inserted\" \/><span class=\"ng-star-inserted\">\u2022\u00a0<\/span><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Mechanism:<\/span><\/strong><span class=\"ng-star-inserted\">\u00a0Parallel Scissor Spring-Assisted Cantilever System<\/span><br class=\"ng-star-inserted\" \/><span class=\"ng-star-inserted\">\u2022\u00a0<\/span><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Material &amp; Thickness:<\/span><\/strong><span class=\"ng-star-inserted\">\u00a02.5 mm \u2013 3.0 mm Heavy-Duty Cold-Rolled Carbon Steel<\/span><br class=\"ng-star-inserted\" \/><span class=\"ng-star-inserted\">\u2022\u00a0<\/span><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Springs:<\/span><\/strong><span class=\"ng-star-inserted\">\u00a0Industrial High-Tensile 65Mn Manganese Coil Springs<\/span><br class=\"ng-star-inserted\" \/><span class=\"ng-star-inserted\">\u2022\u00a0<\/span><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Load Capacity:<\/span><\/strong><span class=\"ng-star-inserted\">\u00a060kg \u2013 80kg per pair<\/span><br class=\"ng-star-inserted\" \/><span class=\"ng-star-inserted\">\u2022\u00a0<\/span><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Finish:<\/span><\/strong><span class=\"ng-star-inserted\">\u00a0Electrophoretic Anti-Corrosion Matte Black (48H Salt Spray Tested)<\/span><br class=\"ng-star-inserted\" \/><span class=\"ng-star-inserted\">\u2022\u00a0<\/span><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Applications:<\/span><\/strong><span class=\"ng-star-inserted\">\u00a0Modular sectional storage sofas, ottoman boxes, and daybeds<\/span><\/p>\n<p class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">\ud83d\udce6\u00a0<\/span><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Direct Factory Wholesale | Low MOQ for Furniture Makers | Free Samples<\/span><\/strong><br class=\"ng-star-inserted\" \/><span class=\"ng-star-inserted\">\ud83d\udcf2\u00a0<\/span><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Quick Inquire (WhatsApp):<\/span><\/strong><span class=\"ng-star-inserted\">\u00a0<a href=\"https:\/\/wa.me\/message\/M6FPBFEHD773P1\">+86 138 2752 1875<\/a> | \u2709\ufe0f\u00a0<\/span><strong class=\"ng-star-inserted\"><span class=\"ng-star-inserted\">Email:<\/span><\/strong><span class=\"ng-star-inserted\">\u00a0<\/span><a class=\"ng-star-inserted\" href=\"https:\/\/www.google.com\/url?sa=E&amp;q=mailto%3AZK-ZhengKai%40outlook.com\" target=\"_blank\" rel=\"noopener noreferrer\"><span class=\"ng-star-inserted\">ZK-ZhengKai@outlook.com<\/span><\/a><\/p>","protected":false},"featured_media":1739,"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 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Folding Sofa Bed Hinge Mechanism | BLS Hardware","author":"BLS Hardware","date":"27 \u0438\u044e\u043b\u044f, 2026","format":false,"excerpt":"Industrial-grade spring-assisted folding sofa bed hinge mechanism engineered for convertible futons, folding daybeds, and click-clack sleeper couches. Spring-Counterbalanced Folding: Dual high-tension manganese alloy extension springs balance backrest weight, enabling effortless 90\u00b0 to 180\u00b0 transition. Heavy-Gauge Flat Bar Steel: Stamped from 3.0mm \/ 3.5mm high-tensile Q235 cold-rolled steel linkages to resist\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 HardwareFolding Sofa Bed Hinge Mechanism","src":"https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/bls-folding-sofa-bed-hinge-heavy-duty-linkage-arms-pair.jpg?fit=750%2C750&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/bls-folding-sofa-bed-hinge-heavy-duty-linkage-arms-pair.jpg?fit=750%2C750&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/bls-folding-sofa-bed-hinge-heavy-duty-linkage-arms-pair.jpg?fit=750%2C750&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/bls-folding-sofa-bed-hinge-heavy-duty-linkage-arms-pair.jpg?fit=750%2C750&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":1772,"url":"https:\/\/blshardware.com\/ru\/product\/sofa-bed-lift-up-mechanism\/","url_meta":{"origin":1740,"position":1},"title":"BLS Heavy-Duty Spring Sofa Bed Lift-Up &#038; Fold-Down Mechanism | BLS Hardware","author":"BLS Hardware","date":"8 \u0438\u044e\u043b\u044f, 2026","format":false,"excerpt":"The sofa bed lift up mechanism (Model: BLS-SBM800) manufactured by BLS Hardware is a multi-pivot scissor linkage hinge engineered for convertible daybeds, storage ottomans, and folding sofa beds. Equipped with dual high-tension helical coil springs and a stamped cold-rolled steel chassis, it delivers an 80\u00b0 high-clearance opening angle with counterbalanced\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":"sofa bed lift up mechanism with dual high tension helical springs","src":"https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/img_alibaba1783531399.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_alibaba1783531399.jpg?fit=1024%2C1024&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/img_alibaba1783531399.jpg?fit=1024%2C1024&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/blshardware.com\/wp-content\/uploads\/2026\/07\/img_alibaba1783531399.jpg?fit=1024%2C1024&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":4477,"url":"https:\/\/blshardware.com\/ru\/product\/spring-sofa-storage-lift-hinge\/","url_meta":{"origin":1740,"position":2},"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). 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