Mechanical extension device, seat unit and zero-gravity zero-wall sofa
By designing the base, leg assembly, and composite limiting components of the mechanical extension device, the issues of adaptability and stability of the seat leg assembly are resolved, enabling smooth posture changes and noise reduction at different seat heights, and providing a comfortable user experience.
CN122250767APending Publication Date: 2026-06-23JASON FURNITURE(HANGZHOU) CO LTD
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-04-23
- Publication Date
- 2026-06-23
AI Technical Summary
Technical Problem
Existing seat leg components with posture-adjustable functions are difficult to adapt to seats with low heights, and their smoothness and stability are insufficient, easily resulting in jerking and noise.
Method used
The system employs a mechanical extension device, including a base, leg assembly, and drive assembly. Through composite limiting components and support swing assemblies, it enables flexible extension and cushioning of the leg assembly, adapting to different seating heights, and uses flexible components to buffer impacts and reduce noise.
Benefits of technology
The leg components are adapted to different seating heights, improving the smoothness and stability of movement, avoiding jerks and noise, and providing a comfortable experience for changing postures.
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Smart Images
Figure CN122250767A_ABST
Abstract
The application discloses a mechanical stretching device, a seat unit and a zero-gravity zero-reclining wall sofa. The leg assembly of the mechanical stretching device comprises a fifth leg link, a tenth leg link and a main footrest. In the process of changing the mechanical stretching device from a sitting position to a TV position, the fifth leg link is approximately translated, the fifth leg link pushes the main footrest to rotate relative to the tenth leg link, and the main footrest is ensured to rotate in a small range after the leg assembly is lifted to a height. The support swing assembly is provided with a first limiting point. The composite limiting part of the first limiting point comprises a rigid part and a flexible part. The flexible part buffers the impact between the elastic deformation buffer base and the composite limiting part. The composite limiting part is also arranged in the base, the backrest assembly, the leg assembly, the connecting assembly and the support swing assembly in the mechanical stretching device, so that the mechanical stretching device is prevented from appearing a jerk and abnormally twisting in the overall movement process, and the mechanical stretching device is also prevented from emitting noise in the movement process.
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