Hinge for synchronous rotation and electronic device

Patent metadata

Field	Value
Publication number	US-12468352-B2
Application number	US-202117921671-A
Country	US
Kind code	B2
Filing date	Nov 30, 2021
Priority date	Nov 30, 2021
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

Abstract

Provided is a hinge. The hinge includes: a mounting base, two torsion shafts, a resilient structure, and two rotary arms; wherein the two torsion shafts and the resilient structure are mounted on the mounting base, the resilient structure is disposed between the two torsion shafts, and the two rotary arms are connected to the two torsion shafts respectively; a bump is disposed on a side wall of each of the two torsion shafts, wherein the bump is disposed on a side, close to the resilient structure, of the torsion shaft, and the bumps of the two torsion shafts are in contact with the resilient structure; and the resilient structure is configured to apply a force to the torsion shaft by the bumps, such that the two rotary arms have a tendency to rotate away from each other.

First claim

What is claimed is:

1 . A hinge for synchronous rotation, comprising: a mounting base, two torsion shafts, a resilient structure, two rotary arms, and a synchronization shaft; wherein
the two torsion shafts and the resilient structure are mounted on the mounting base, the resilient structure is disposed between the two torsion shafts, and the two rotary arms are connected to the two torsion shafts respectively; a bump is disposed on a side wall of each of the two torsion shafts, wherein the bump is disposed on a side, close to the resilient structure, of the torsion shaft, and the bumps of the two torsion shafts are in contact with the resilient structure; the synchronization shaft is disposed between the two rotary arms and perpendicular to the two torsion shafts, the synchronization shaft has a first synchronization gear at a first end of the synchronization shaft and a second synchronization gear at a second end of the synchronization shaft, the two torsion shafts are provided with third synchronization gears respectively, and the third synchronization gears engage with the first synchronization gear and the second synchronization gear respectively; and the resilient structure is configured to apply a force to the torsion shaft by the bumps, such that the two rotary arms have a tendency to rotate away from each other.

2 . The hinge according to claim 1 , wherein the resilient structure comprises a guide member, a slider, and a first resilient member; wherein
the guide member is fixedly connected to the mounting base; the slider is connected to the guide member and is slidable along the guide member, and the bump is in contact with the slider; and the first resilient member is configured to supply a spring force to the slider, wherein the spring force is in a direction towards the bump.

3 . The hinge according to claim 2 , wherein two push slots are disposed on a surface of the slider, wherein the two push slots are disposed on the surface, close to the bump, of the slider and at opposite sides of the slider, the two push slots are arranged along the two torsion shafts, and the bumps of the two torsion shafts are disposed in the two push slots respectively.

4 . The hinge according to claim 3 , wherein bottom surfaces of the two push slots are inclined surfaces, and the bump is in contact with the inclined surface.

5 . The hinge according to claim 3 , wherein a guide hole is disposed in a middle of the slider, and the guide hole is disposed between the two push slots; and
the guide member comprises a guide rod, wherein at least at one end of the guide rod is connected to the mounting base and is disposed in the guide hole.

6 . The hinge according to claim 3 , wherein the slider comprises a body portion and two protrusions; wherein
the two push slots are disposed on opposite sides of the body portion; the two protrusions are disposed on opposite sides of the body portion and between the two push slots and connected to the body portion; each of the two protrusions is provided with a guide hole; and the guide member comprises two guide rods, wherein at least one end of the two guide rods is fixedly connected to the mounting base, and the two guide rods are disposed in the guide holes of the two protrusions respectively.

7 . The hinge according to claim 5 , wherein a first retaining protrusion is disposed on a side wall of the guide rod, wherein the first retaining protrusion is disposed on a side, close to the bump, of the slider.

8 . The hinge according to claim 7 , wherein the first resilient member is disposed between the mounting base and the slider and on a side, away from the first retaining protrusion, of the slider, and the first resilient member is in a compressed state; or
the first resilient member is disposed on a side, close to the first retaining protrusion, of the slider, and the first resilient member is in a stretched state.

9 . The hinge according to claim 2 , wherein the guide member comprises a base, the base being provided with a holding slot, the holding slot being disposed on a side, close to the bump, of the base;
the slider is disposed partly in the holding slot and partly outside the holding slot and is telescopable relative to the base; and the first resilient member is disposed in the holding slot.

10 . The hinge according to claim 9 , wherein a second retaining protrusion is disposed on a side wall of the holding slot, a third retaining protrusion is disposed on a side wall of the slider, and the third retaining protrusion is disposed in the holding slot and on a side, distal from the bump, of the second retaining protrusion; and
on a plane perpendicular to a telescoping direction of the slider, an orthographic projection of the second retaining protrusion is at least partially overlapped with an orthographic projection of the third retaining protrusion.

11 . The hinge according to claim 2 , wherein the first resilient member is a spring.

12 . The hinge according to claim 1 , wherein the hinge further comprises two sliding plates and a fixed block, the fixed block being disposed in the mounting base and at an end of the torsion shaft, the fixed block having two curved slides;
wherein the sliding plate comprises a sliding body and an arc arm, the sliding body is connected to one end of the arc arm, the arc arms of the two sliding plates are disposed in the two curved slides respectively, and the sliding bodies of the two sliding plates are connected to the two rotary arms respectively.

13 . The hinge according to claim 12 , wherein the sliding body has a strip slot; and
a connecting slider is disposed on a side, close to the sliding plate, of the rotary arm, and the connecting sliders of the two rotary arms are disposed in the strip slots of the two sliding plates respectively.

14 . The hinge according to claim 1 , wherein the hinge further comprises a fixed base, the synchronization shaft and the fixed base being disposed in the mounting base, a middle of the synchronization shaft being rotatably connected to the fixed base, the fixed base being connected to the mounting base.

15 . The hinge according to claim 14 , wherein a mounting through slot is disposed in a middle of the fixed base, the synchronization shaft is disposed in the mounting through slot, and the first synchronization gear and the second synchronization gear are disposed on opposite sides of the fixed base.

16 . The hinge according to claim 1 , wherein the torsion shaft comprises a spindle and a damping structure, the damping structure comprising a first end cam, a second end cam, a first axial retaining member, a second axial retaining member, and a second resilient member;
wherein the first retaining member, the first end cam, the second end cam, the second resilient member, and the second retaining member are sequentially sleeved on the spindle, and an end face of the first end cam is engaged with an end face of the second end cam; and side walls of the first end cams of two the torsion shafts are connected to each other.

17 . The hinge according to claim 16 , wherein the damping structure further comprises a friction plate, the friction plate being sleeved on the spindle, the friction plate being disposed at least:
between the first retaining member and the first end cam; between the second end cam and the second resilient member; or between the second resilient member and the second retaining member.

18 . An electronic device, comprising a hinge,
wherein the hinge comprises: a mounting base, two

Assignees

• Chengdu Boe Optoelect Tech Co
• Boe Technology Group Co Ltd
• Beijing Boe Technology Dev Co Ltd

Inventors

• Zhang Jun
• You Chuankun
• Wu Fengping
• Qing Wei
• Wang Zhihui

Classifications

• G06F1/1616

  with folding flat displays, e.g. laptop computers or notebooks having a clamshell configuration, with body parts pivoting to an open position around an axis parallel to the plane they define in closed position · CPC title

• F16C11/12

  incorporating flexible connections, e.g. leaf springs · CPC title

• G06F1/16

  Constructional details or arrangements · CPC title

• F16C11/04

  Pivotal connections (hinges for doors, windows or wings E05D) · CPC title

• G06F1/1681 Primary

  Details related solely to hinges (hinge details related to the transmission of signals or power are classified in G06F1/1683) · CPC title