Mechanical extension device for a movable seat unit and seat unit

By designing a mechanical extension device including a base assembly, side panel, backrest assembly and central connecting member, the gap between the backrest and the seat portion during attitude change is solved, and higher comfort and safety are achieved.

CN222675784UActive Publication Date: 2025-03-28REMACRO TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202421577232.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-05
Publication Date
2025-03-28
Estimated Expiration
2034-07-05

AI Technical Summary

Technical Problem

When the existing movable seat unit changes from a casual posture to a lying posture, a gap appears between the backrest and the seat portion, resulting in the risk of the user's top being pulled out and the item being dropped.

Method used

A mechanical extension device is designed, including a fixed support ground base assembly, a movable side panel, a backrest assembly pivotally connected to the side panels and a central coupling member. The backrest link assembly is compressed by a hinged structure when the backrest mounting is rotated backward and moves forward relative to the ground, reducing or eliminating the gap between the backrest and the seat portion.

Benefits of technology

It realizes the reduction or elimination of gaps between the backrest and the seat part during the seat unit posture change process, reduces the risk of item dropping and the user's top being pulled out, improves the comfort of use and saves installation space.

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Abstract

The utility model relates to a mechanical stretching device for a movable seat unit. The mechanical stretching device comprises a base assembly; a side panel for attaching a seat portion of the seat unit; the backrest assembly comprises a backrest mounting piece and a backrest connecting rod assembly; and a central linkage member; wherein the backrest connecting rod assembly comprises a first backrest connecting rod and a second backrest connecting rod, the upper end part of the first backrest connecting rod is hinged with the front end of the backrest mounting piece at a first pivot point, the front end part of the second backrest connecting rod is hinged with the side plate at a second pivot point, and the middle part of the second backrest connecting rod is hinged with the middle part of the first backrest connecting rod; a leg stretching device; the mechanical stretching device enables the seat unit to be converted between at least a sitting position and a lying position, and compared with the sitting position, the distance between the first pivot point and the second pivot point is reduced in the lying position. In addition, the utility model further relates to a movable seat unit.
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