Knockdown Bed Frame Joint for Tool-Free Firm Assembly

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Solution Overview

Problem

Conventional knockdown beds are difficult to move and store due to their large and heavy design, and the existing screw hole and bolt connection system is time-consuming and inconvenient for assembly and disassembly.

Innovation Solution

A knockdown bed design featuring a first bed frame with insertion members and a second bed frame with complementary slot members, allowing for tool-free assembly and disassembly by inserting trapezoidal insertion members into slot members, which interconnect the frames firmly without the need for screws or tools.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If screw holes and bolts are used to connect bed parts, then the bed can be assembled, but the assembly process becomes time-consuming and requires tools

Engineering Contradiction:
Improveassembly convenienceVSAvoidassembly time
Core Design Contradiction:
Ease of manufactureVSLoss of time

Solution Approach 1:

The patent extracts and eliminates the need for screws, bolts, and other fastening tools from the assembly process. The connection structure directly integrates the fastening function into the frame components themselves, allowing tool-free assembly by simply inserting and locking the frames together.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The connection structure enables the bed frames to assemble themselves without external tools. The first and second bed frames have complementary connection features that automatically align and secure when brought together, making the assembly process self-service and eliminating the need for users to carry or learn to use assembly tools.

Inventive Principle:
Principle #25Self-service

2Stability of the object's composition

If the bed is designed as a complete assembled unit, then it provides structural stability, but it becomes difficult to move and store

Engineering Contradiction:
Improvestructural stabilityVSAvoidmovability and storability
Core Design Contradiction:
Stability of the object's compositionVSAdaptability or versatility

Solution Approach 1:

The patent divides the bed into separable first and second bed frames that can be easily disconnected and reconnected. Each frame maintains its structural integrity independently, and the connection between frames provides sufficient stability when assembled, while allowing complete disassembly for moving and storage purposes.

Inventive Principle:
Principle #1Segmentation

3Adaptability or versatility

If the bed is designed as a knockdown structure for easy moving, then it becomes easier to store, but the connection parts become unstable over time

Engineering Contradiction:
ImprovestorabilityVSAvoidconnection stability
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

The connection structure employs asymmetric complementary features between the first and second bed frames. The connection surfaces and locking mechanisms are designed with specific geometric relationships that prevent loosening and disengagement over time, ensuring stable and reliable connections that maintain structural integrity through repeated assembly and disassembly cycles.

Inventive Principle:
Principle #4Asymmetry

Data Source

PatentUS9226588B2Knockdown bed
Publication Date: 2016.01.05 RUOEY LUNG ENTERPRISE
  • US9226588B2 patent drawing
  • US9226588B2 patent drawing
  • US9226588B2 patent drawing

AI summary

A knockdown bed is formed of a first bed frame and a second bed frame. The first bed frame includes a top side, a bottom side, and an insertion member. The insertion member has an insertion end, a fixed end connected with the bottom side, two lateral sides, and two abutment surfaces connected with the two lateral sides. The two abutment surfaces gradually approach each other from the fixed end to the insertion end. The second bed frame includes a top side, a bottom side, and a slot member adjacent to the first bed frame. The slot member is formed of two sidewalls, two abutment walls connected with the two sidewalls, and a slot, into which the insertion member can be inserted to interconnect the first and second bed frames. In this way, the knockdown bed can be easily assembled and structurally firm.