Seat bracket and zero-wall-gap seat with seat bracket

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Solution Overview

Problem

Movable sofas experience gaps at the junction of the backrest and seat parts during unfolding, leading to potential item falling or pinching risks, which affect the use experience.

Innovation Solution

A seat bracket with a linkage assembly, backrest mechanism, and limiting plate that limits the motion range of the backrest mounting plate, forming a four-connecting rod mechanism to reduce the gap between the backrest and seat parts, enhancing stability and use experience.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the backrest is reclined during the unfolding process, then the sofa can transition to TV position or lying position, but a gap is formed at the junction of the backrest part and the seat part

Engineering Contradiction:

Improvesofa position adjustmentVSAvoidgap at backrest-seat junction

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The patent introduces a filling assembly comprising a filling plate and filling components that act as an intermediary element to fill the gap formed between the backrest part and seat part during reclining. The filling plate is disposed in the gap and the filling components are disposed on the filling plate, effectively eliminating the harmful gap while allowing the backrest to recline for position adjustment.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent extracts the gap-filling function as a separate assembly (filling assembly) distinct from the main backrest and seat structures. This allows the gap to be addressed independently through the filling plate and filling components, enabling the backrest to recline freely while the gap is separately managed and eliminated.

Inventive Principle:

Principle #2Taking out (Extraction)

2Adaptability or versatility

If the backrest is reclined to enable position adjustment, then the sofa provides multiple usage modes, but the gap formation creates safety hazards such as item falling or pinching

Engineering Contradiction:

Improvemultiple usage modesVSAvoidsafety hazards from gap

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The filling assembly serves as a protective intermediary that eliminates the harmful gap while maintaining the reclining functionality. The filling plate and filling components fill the space that would otherwise create safety hazards, preventing items from falling into the gap and eliminating pinching risks, thus allowing multiple usage modes to be safely implemented.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The filling assembly is disposed in advance in the potential gap area before the backrest is reclined. This preliminary placement of the filling components prevents the formation of harmful gaps during the reclining process, proactively eliminating safety hazards before they can occur while enabling position adjustment.

Inventive Principle:

Principle #9Preliminary anti-action

Data Source

PatentUS12520941B1Seat bracket and zero-wall-gap seat with seat bracket

Publication Date: 2026.01.13 DEWERTOKIN TECHNOLOGY GROUP CO LTD

AI summary

A seat bracket and a zero-wall-gap seat with the seat bracket are provided. The seat bracket includes: a base; a linkage assembly including a bracket side plate and a linkage assembly, wherein the linkage assembly is hinged with the base and the bracket side plate is hinged on the linkage assembly; and a backrest mechanism including a backrest mounting plate, a backrest pivoting assembly and a limiting plate, wherein the backrest pivoting assembly includes a first front backrest connecting rod, a second front backrest connecting rod and a rear backrest connecting rod; and the backrest mounting plate has a reclined position tilted backwards relative to the base and a reset position reset relative to the base.