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Automotive Manual Reclining Front Seat Backrest Steel Frame Assembly
This component serves as the core load-bearing support frame for vehicle seat backrests. Built with an integrated welded tubular steel frame, S-shaped arch spring suspension grid, manual recliner mechanisms, and locking devices, it supports human back loads and enables backrest angle locking and adjustment. Designed to assemble with seat backrest foam, it fits passenger cars, commercial vans, and fleet vehicles as a fundamental structure for ergonomic support and angle adjustment.
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Main Perimeter Frame
Q235 cold-rolled seamless steel tubing, wall thickness 1.2 to 1.5 mm; One-piece bent and fully welded; Full electro-coating anti-rust treatment for corrosion resistance in humid vehicle environments.
S-Type Support Springs
High-carbon manganese spring steel wire, wire diameter 3.2 to 3.8 mm; Heat-treated, quenched, and tempered; Long-lasting elasticity, anti-fatigue tension, and resistant to slack or deformation.
Recliner Mechanism Main Unit
Die-cast alloy steel gear set components with high-strength stamped shell casing; Mechanical pawl ratchet locking structure.
Buffer Sleeves
EPDM aging-resistant rubber; Resistant to high and low temperatures, wear-resistant, and anti-aging; Prevents metal-on-metal friction noise.
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Key Features & Selling Points:
- High-Strength Tubular Frame & Spring Grid: Features electro-coated Q235 seamless steel tubing (1.2 to 1.5 mm wall thickness) and heat-treated high-carbon spring wire, providing a rust-proof foundation that resists fatigue and deformation.
- Wide Reclining Angle Range: Supports smooth backrest angle adjustment from 95 to 170 degrees (unloaded adjustable range) to accommodate upright driving posture and semi-reclined resting positions.
- Independent Dual-Side Synchronized Locking: Operates via a single-side mechanical manual lever that activates independent locks on both sides, ensuring synchronized left-right locking.
- Stepless Ratchet Engagement: Features a multi-position ratchet pawl lock that engages instantly at any angle upon releasing the lever, preventing false locking or position slippage.
- Low-Effort Ergonomic Unlocking: Requires only 25 to 40 N of unlocking pull force for easy hand lever actuation, paired with EPDM rubber buffer sleeves to eliminate metallic operational noise.
