A sofa bed

By using a linked backrest and inner backrest structure, combined with a linkage sofa leg and telescopic limiting mechanism, the problem of insufficient unfolded length of the sofa bed is solved, achieving a longer bed surface length and stable support, thus improving user comfort and convenience.

CN224357288UActive Publication Date: 2026-06-16JASON FURNITURE(HANGZHOU) CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
JASON FURNITURE(HANGZHOU) CO LTD
Filing Date
2025-06-24
Publication Date
2026-06-16

AI Technical Summary

⚠Technical Problem

Existing sofa beds, when unfolded into bed form, often have insufficient total length after stretching, making it difficult to meet users' needs for comfortable lying down and sleeping, resulting in a poor customer experience.

⚗Method used

A sofa bed was designed that increases the total length of the bed by having the backrest and inner backrest frames expand or close in tandem when the bottom frame moves. Stable support is provided by the connecting sofa legs, and the support rods rotate automatically during expansion and folding. Combined with the telescopic limit mechanism, stable locking is achieved for multiple usage modes.

🎯Benefits of technology

When the sofa bed is unfolded into a bed, the overall length of the bed is significantly increased, providing a more spacious and comfortable sleeping experience. At the same time, the automatic unfolding and folding of the support rods is highly convenient, enhancing the user experience.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a sofa bed, including backrest frame, bottom frame, bottom frame sets up in the front side of backrest frame, and can move along the predetermined track relative to backrest frame, back frame, back frame sets up between bottom frame and backrest frame, and one end of back frame is articulated in backrest frame, back frame, back frame sets up between back frame and bottom frame, and one end of back frame is articulated in the other end of back frame, and the other end of back frame is articulated in bottom frame. When bottom frame moves relative to backrest frame, back frame and back frame will be linked and spread or close. In the process of unfolding into bed, the back frame and back frame that originally constitute sofa backrest will change from folding state to flat state, and its own length is effectively added to the bed surface length formed by bottom frame pulling out. The design of converting sofa backrest part into bed surface extension part makes the total length of unfolded bed body increase.
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