Self-Locking Folding Bedstead Cross Mechanism for Deployment Stability

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing folding bedsteads face issues such as limited maximum deployment angle, fabric damage, uneven tightness leading to discomfort, instability during use, accidental folding, and inconvenience due to manual safety locks.

Innovation Solution

A self-locking folding bedstead with a cross mechanism featuring rotatable connecting rods and a limiting mechanism that allows an opening angle greater than 180 degrees, preventing excessive deployment and ensuring stability and comfort through symmetrically arranged hinge mechanisms and an abutting member for self-locking.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the deployment angle is limited by bed fabric, then the bedstead maintains deployment state, but the fabric is easy to be damaged

Engineering Contradiction:

Improvedeployment state maintenanceVSAvoidfabric damage

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces a limiting mechanism with an abutting member as an intermediary between the connecting rod and the fabric. The abutting member abuts against the connecting rod to prevent excessive deployment, thereby protecting the fabric from damage while maintaining the deployment state. This mediator transfers the limiting function from the fabric itself to a dedicated mechanical component.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If the bedstead uses existing cross mechanism, then it can be folded, but it is easy to accidentally fold inward during use which is unstable

Engineering Contradiction:

Improvefolding capabilityVSAvoidanti-accidental folding stability

Core Design Contradiction:

Ease of operationVSStability of the object's composition

Solution Approach 1:

The patent applies preliminary anti-action by designing a limiting mechanism that prevents the cross mechanism from folding inward during use. The abutting member is positioned to abut against the connecting rod, creating a preliminary counter-force that opposes any accidental inward folding, thereby ensuring stability while maintaining folding capability.

Inventive Principle:

Principle #9Preliminary anti-action

3Stability of the object's composition

If a manual safety lock is added to prevent accidental folding, then stability is improved, but users will often forget to lock/unlock which causes inconvenience and damage

Engineering Contradiction:

Improveanti-accidental folding stabilityVSAvoidconvenience of use

Core Design Contradiction:

Stability of the object's compositionVSEase of operation

Solution Approach 1:

The patent implements self-service by designing a limiting mechanism that automatically prevents accidental folding without requiring user intervention for locking or unlocking. The abutting member and connecting rod work together to provide automatic stability, eliminating the need for manual safety locks and their associated operational inconveniences.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent extracts the safety locking function from the manual operation domain and integrates it directly into the cross mechanism structure. The limiting mechanism is built into the connection between the abutting member and connecting rod, removing the need for separate manual safety locks and simplifying the overall system.

Inventive Principle:

Principle #2Taking out (Extraction)

4Ease of operation

If the bedstead allows free deployment, then ease of use is improved, but the angle cannot be controlled leading to fabric damage and instability

Engineering Contradiction:

Improvedeployment easeVSAvoiddeployment angle control

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent introduces a limiting mechanism with an abutting member as an intermediary that automatically controls the deployment angle. The abutting member abuts against the connecting rod to prevent excessive deployment, thereby controlling the angle while maintaining ease of use. This mediator provides automatic angle control without restricting the user's ability to deploy the bedstead.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS10820712B2Self locking folding bedstead

Publication Date: 2020.11.03 XIAMEN ROADZUP OUTDOOR PROD

AI summary

The invention discloses a self locking folding bedstead, which comprises two transverse rods and self locking cross mechanisms. The self locking cross mechanism comprises a shearing mechanism, two second connecting rods and two third connecting rods, and the shearing mechanism comprises two first connecting rods. One end of the second connecting rod can be rotatably connected to the transverse rod, the other end can be rotatably connected to the first connecting rod, the third connecting rod can be rotatably connected to the second connecting rod, and the third connecting rod can be rotatably connected to the other first connecting rod. The shearing mechanism, two second connecting rods and two third connecting rods cooperate to form two sets of symmetrically arranged hinge four connecting rods mechanism. The self locking cross mechanism is provided with a limiting mechanism to limit the maximum angle of deployment, and the angle of the opening facing downward formed by the two third connecting rods of the self locking cross mechanism at the maximum deployment angle is greater than 180 degrees. It has the following advantages: the mechanism can be kept in the self locking state, so that the bed width and bed height are fixed, so that the bed surface can be tightened, stable and non-dumping, comfortable to use.