Pocket Spring Mattress Edge Reinforcement With Dual-Stiffness Springs

Solution Overview

Problem

Modern mattresses with two layers of springs face challenges in achieving sufficient edge reinforcement, leading to increased complexity and cost.

Innovation Solution

The mattress incorporates double layer spring units with frame springs having a higher spring constant than reference springs, arranged in outermost rows or columns to reinforce the edges without additional components like frames or wires.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If traditional foam box or steel frame constructions are used to reinforce mattress edges, then edge reinforcement and stability are improved, but manufacturing complexity and cost increase

Engineering Contradiction:

Improveedge reinforcementVSAvoidmanufacturing complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The patent merges the edge reinforcement function with the existing spring units by incorporating frame springs directly into the pocket spring structure. Instead of adding separate foam boxes or steel frames, the reinforcement is integrated into the spring units themselves, which are then arranged in outermost rows to form reinforced edges. This eliminates the need for additional components while achieving the desired edge support.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The spring units serve multiple functions: they provide the primary mattress support function while simultaneously serving as edge reinforcement when arranged in outermost rows. The frame springs within these spring units provide both structural support and edge reinforcement, eliminating the need for dedicated reinforcement components and simplifying the overall mattress construction.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Strength

If traditional foam box or steel frame constructions are used to reinforce mattress edges, then edge reinforcement and stability are improved, but manufacturing cost increases

Engineering Contradiction:

Improveedge reinforcementVSAvoidmanufacturing cost

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

The patent merges the edge reinforcement function with the existing spring units by incorporating frame springs directly into the pocket spring structure. Instead of adding separate foam boxes or steel frames, the reinforcement is integrated into the spring units themselves, which are then arranged in outermost rows to form reinforced edges. This eliminates the need for additional components while achieving the desired edge support.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The spring units serve multiple functions: they provide the primary mattress support function while simultaneously serving as edge reinforcement when arranged in outermost rows. The frame springs within these spring units provide both structural support and edge reinforcement, eliminating the need for dedicated reinforcement components and simplifying the overall mattress construction.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If two layers of springs are used in the mattress, then comfort and support performance are improved, but achieving sufficient edge reinforcement becomes more complex

Engineering Contradiction:

Improvecomfort and support performanceVSAvoidedge reinforcement complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges the edge reinforcement function with the existing spring units by incorporating frame springs directly into the pocket spring structure. Instead of adding separate foam boxes or steel frames, the reinforcement is integrated into the spring units themselves, which are then arranged in outermost rows to form reinforced edges. This eliminates the need for additional components while achieving the desired edge support.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent applies local quality by differentiating the spring units based on their position within the mattress. Spring units containing frame springs are specifically arranged in the outermost rows to provide edge reinforcement, while other spring units provide general support. This localized approach to reinforcement addresses the edge support need without requiring all spring units to be complex, thereby maintaining overall system simplicity.

Inventive Principle:

Principle #3Local quality

Data Source

PatentEP3735155B1Reinforced pocket spring mattress

Publication Date: 2025.04.09 INTER IKEA SYST

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AI summary

A pocket spring mattress (1) comprising a plurality of double layer spring units (7) arranged in rows and columns to form a rectangular shaped mattress is provided. Each double layer spring unit (7) comprises a first pocket spring unit (2a) arranged 5 axially onto a second pocket spring unit (2b), and each spring unit (2a, 2b) comprises a number of springs (3a-b, 4a-b) and a fabric pocket (6') enclosing the springs (3a-b, 4a- b). The springs (3a-b, 4a-b) comprises reference springs (3a-b) having a first spring constant and frame springs (4a-b) having a second spring constant being greater than the first spring constant, and frame springs (4a-b) are arranged in at least one of the first and 10 second pocket spring units (2a, 2b) of at least one outermost row or column of the double layered spring units (7) in a configuration such that the edge of the mattress (1) is reinforced.