Extension unit, adjustment structure, and seat frame

Patent metadata

Field	Value
Publication number	US-12588762-B2
Application number	US-202218567939-A
Country	US
Kind code	B2
Filing date	Jun 7, 2022
Priority date	Jun 7, 2021
Publication date	Mar 31, 2026
Grant date	Mar 31, 2026

Abstract

A seat frame includes: a base including a transverse support rod and a longitudinal support rod; an elevation unit including a support, a first elevation rod, a second elevation rod, and a connecting piece; an extension unit including a base plate, a lifting unit, a foot adjustment unit, and a backrest adjustment unit, where the base plate being fixed to the connecting piece; and a power unit disposed on the base and separately connected to the elevation unit and the extension unit, where the power unit includes a drive unit, a connecting base, and a drive connecting rod, a first end of the drive unit is hinged to the base, and a second end of the drive unit is hinged to the connecting base.

First claim

What is claimed:

1 . A seat frame, comprising:
a base, comprising a transverse support rod and a longitudinal support rod, wherein the transverse support rod extends in a first direction, the longitudinal support rod extends in a second direction that is different from the first direction, and the transverse support rod is connected to the longitudinal support rod; an elevation unit, comprising a support, a first elevation rod, a second elevation rod that is different from the first elevation rod, and a connecting piece, wherein a first end of the first elevation rod is hinged to the support, and a second end of the first elevation rod is hinged to the connecting piece; a first end of the second elevation rod is hinged to the support, and a second end of the second elevation rod is hinged to the connecting piece; a hinge point position where the first elevation rod is hinged to the support is different from a hinge point position where the second elevation rod is hinged to the support, a hinge point position where the first elevation rod is hinged to the connecting piece is different from a hinge point position where the second elevation rod is hinged to the connecting piece, the hinge point position where the first elevation rod is hinged to the support is different from the hinge point position where the first elevation rod is hinged to the connecting piece, and the hinge point position where the second elevation rod is hinged to the support is different from the hinge point position where the second elevation rod is hinged to the connecting piece; an extension unit, comprising a base plate, a lifting unit, a foot adjustment unit, and a backrest adjustment unit, wherein the base plate is fixed to the connecting piece; and a power unit, disposed on the base and separately connected to the elevation unit and the extension unit, wherein the power unit comprises a drive unit, a connecting base, and a drive connecting rod, a first end of the drive unit is hinged to the base, and a second end of the drive unit is hinged to the connecting base; wherein the lifting unit comprises a first lifting connecting rod, a second lifting connecting rod, a third lifting connecting rod, a fourth lifting connecting rod, and a seat surface mounting portion; the first lifting connecting rod, the second lifting connecting rod, the third lifting connecting rod, and the fourth lifting connecting rod are different from each other, a first end of the first lifting connecting rod is hinged to the base plate, a second end of the first lifting connecting rod is hinged to a first end of the third lifting connecting rod, a second end of the third lifting connecting rod is hinged to a first end of the seat surface mounting portion, a second end of the seat surface mounting portion is hinged to a first end of the fourth lifting connecting rod, a second end of the fourth lifting connecting rod is hinged to a first end of the second lifting connecting rod, and a second end of the second lifting connecting rod is connected to the base plate; the first lifting connecting rod and the second lifting connecting rod are hinged at a first rotating fulcrum, and the first rotating fulcrum is located in a middle region of at least one of the first lifting connecting rod or the second lifting connecting rod.

2 . The seat frame according to claim 1 , wherein the second end of the second lifting connecting rod is provided with a sliding slot, the base plate is provided with a corresponding hinge shaft, and the hinge shaft is disposed in the sliding slot.

3 . The seat frame according to claim 1 , wherein the foot adjustment unit comprises a first foot adjustment rod, a second foot adjustment rod, a third foot adjustment rod, a fourth foot adjustment rod, and a foot mounting portion, wherein the first foot adjustment rod, the second foot adjustment rod, the third foot adjustment rod, and the fourth foot adjustment rod are different from each other, a first end of the first foot adjustment rod is hinged to the first end of the third lifting connecting rod, a second end of the first foot adjustment rod is hinged to a first end of the second foot adjustment rod, a second end of the second foot adjustment rod is hinged to the foot mounting portion, a first end of the third foot adjustment rod is hinged to the first end of the seat surface mounting portion, a second end of the third foot adjustment rod is hinged to a first end of the fourth foot adjustment rod, and a second end of the fourth foot adjustment rod is hinged to the foot mounting portion.

4 . The seat frame according to claim 3 , wherein the foot adjustment unit further comprises a fifth foot adjustment rod, a first end of the fifth foot adjustment rod is hinged to a middle region of the first foot adjustment rod, and a second end of the fifth foot adjustment rod is hinged to a middle region of the third foot adjustment rod.

5 . The seat frame according to claim 3 , wherein the second foot adjustment rod and the third foot adjustment rod are hinged at a second rotating fulcrum that is different from the first rotating fulcrum, and the second rotating fulcrum is located in a middle region of at least one of the second foot adjustment rod or the third foot adjustment rod.

6 . The seat frame according to claim 3 , wherein the foot adjustment unit further comprises a fifth foot adjustment rod, a first end of the fifth foot adjustment rod is hinged to the first end of the third lifting connecting rod, and a second end of the fifth foot adjustment rod is hinged to a middle region of the third foot adjustment rod, wherein the first foot adjustment rod, the second foot adjustment rod, the third foot adjustment rod, the fourth foot adjustment rod, and the fifth foot adjustment rod are different from each other.

7 . The seat frame according to claim 1 , wherein the backrest adjustment unit comprises a backrest adjustment rod and a backrest mounting portion, wherein a first end of the backrest adjustment rod is hinged to the base plate, a second end of the backrest adjustment rod is hinged to the backrest mounting portion, and the backrest mounting portion is hinged to the second end of the seat surface mounting portion.

8 . The seat frame according to claim 7 , wherein the second end of the seat surface mounting portion is provided with a turning portion, the turning portion is disposed at an included angle from the main body portion of the seat surface mounting portion, the included angle is 70 to 120 degrees, and the backrest mounting portion is hinged to the turning portion.

9 . The seat frame according to claim 7 , wherein the backrest adjustment rod comprises a main body portion, the first end of the backrest adjustment rod and the second end of the backrest adjustment rod are separately located at both ends of the main body portion, and the first end of the backrest adjustment rod and the second end of the backrest adjustment rod are each bent with respect to the main body portion.

10 . The seat frame according to claim 1 , wherein the power unit further comprises a first drive rod and a second drive rod that is different from the first drive rod, a first end of the first drive rod is hinged to the drive connecting rod, a second end of the first drive rod is hinged to a first end of the second drive rod, and a second end of the second drive rod is hinged to the seat surface mounting portion.

11 . The seat frame according to claim 1 , wherein the base is provided with a first anti-tipping portion and a second anti-tipping portion that is different from the first anti-tipping portion, and one end or both ends of the transverse support rod extends beyond the longitudinal support rod to form the

Assignees

• Dewertokin Tech Group Co Ltd

Inventors

• Li Long
• Ye Qiqi
• Yang Liming
• Zhou Weiyao
• Shen Bin
• Tao Kangming
• Wang Guowei

Classifications

• A47C1/0355

  actuated by linkages, e.g. lazy-tongs mechanisms · CPC title

• A47C1/035

  in combination with movably-coupled seat and back-rest · CPC title

• A47C1/03211

  by electric motors · CPC title

• A61G2200/32

  lying · CPC title

• A61G7/16

  converting a lying surface into a chair · CPC title