IP Library › Granted Patent US 12687897
Granted Patent B2
US 12687897 · App. 18/352,688 · Granted Jul 21, 2026

Rotation structure and electronic device

Inventors: Chunfeng Yuan (Beijing, CN); Yingce Zheng (Beijing, CN)
Assignee: LENOVO (BEIJING) LIMITED
G06F1/1681F16C11/04E05D3/12E05D11/06E05D11/1078E05Y2201/218E05Y2201/224E05Y2999/00
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Quick Facts
Patent No.
US 12687897
App. No.
18/352,688
Granted
Jul 21, 2026
Kind
B2
Abstract

A rotation structure includes a first rotating shaft assembly, a second rotating shaft assembly, and a stopper. The first rotating shaft assembly includes a first shaft and a first wheel, a first groove being arranged on the first wheel. The second rotating shaft assembly includes a second shaft and a second wheel, the second shaft and the first shaft satisfying a parallel condition, a second groove being arranged on the second wheel. A first protrusion and a second protrusion are arranged on the stopper, the first protrusion being limited to move in the first groove, the second protrusion being limited to move in the second groove, and the limit of the first groove to the first protrusion and the limit of the second groove to the second protrusion allow one of the first shaft and the second shaft to rotate.

Claims (80)

1 . A rotation structure comprising:

a first rotating shaft assembly configured to connect to a first body of an electronic device;

a second rotating shaft assembly configured to connect to a second body of the electronic device; and

a stopper, wherein:

the first rotating shaft assembly includes a first shaft and a first wheel arranged on the first shaft, a first groove being arranged on the first wheel;

the second rotating shaft assembly includes a second shaft and a second wheel arranged on the second shaft, the second shaft and the first shaft satisfying a parallel condition, a second groove being arranged on the second wheel;

a first protrusion and a second protrusion are arranged on the stopper, the first protrusion being limited to move in the first groove, the second protrusion being limited to move in the second groove;

the limit of the first groove to the first protrusion and the limit of the second groove to the second protrusion allow one of the first shaft and the second shaft to rotate;

the first groove includes a first linear groove segment and a first spiral groove segment communicating with the first linear groove segment, the second groove includes a second linear groove segment and a second spiral groove segment communicating with the second linear groove segment, the first linear groove segment and the second linear groove segment extend along a first direction, and the first direction is parallel to the first shaft or the second shaft;

when the first body is rotated relative to the second body from 0° to a specific angle, the first protrusion is limited to move in the first linear groove segment, and the second protrusion is limited to move in the second spiral groove segment, to lock the first shaft and rotate the second shaft;

when the first body is rotated relative to the second body from the specific angle to 360°, the first protrusion is limited to move in the first spiral groove segment, and the second protrusion is limited to move in the second linear groove segment, to rotate the first shaft and lock the second shaft; and

the specific angle is an angle between 0° and 360°.

2 . The rotation structure of claim 1 , wherein:

the second groove further includes a third spiral groove segment communicating with the second spiral groove segment.

3 . The rotation structure of claim 1 , wherein:

the first groove further includes a first circumferential groove segment communicating with the first linear groove segment,

the second groove further includes a fourth spiral groove segment communicating with the second spiral groove segment, and

when the first protrusion is limited to move in the first circumferential groove segment, the second protrusion is limited to move in the fourth spiral groove segment to limit the stopper from moving.

4 . The rotation structure of claim 3 , wherein:

the first groove further includes a second circumferential groove segment communicating with the first linear groove segment,

the second groove further includes a fifth spiral groove segment communicating with the second spiral groove segment, and

when the first protrusion is limited to move in the second circumferential groove segment, the second protrusion is limited to move in the fifth spiral groove segment to limit the stopper from moving.

5 . The rotation structure of claim 1 , wherein:

one of the first shaft and the second shaft rotates is a first rotation mode,

the limit of the first groove to the first protrusion and the limit of the second groove to the second protrusion cause the rotation structure to be in a second rotation mode, under the second rotation mode, the first shaft and the second shaft rotate simultaneously.

6 . The rotation structure of claim 1 , wherein:

the stopper includes a first end, a second end arranged oppositely from the first end, a first arc-shaped groove arranged on the first end, and a second arc-shaped groove arranged on the second end, at least part of the first wheel being accommodated in the first arc-shaped groove, at least part of the second wheel being accommodated in the second arc-shaped groove, the first protrusion being arranged on the first arc-shaped groove, the second protrusion being arranged on the second arc-shaped groove.

7 . The rotation structure of claim 1 , further comprising:

a holding assembly, the holding assembly being arranged to limit degree of freedom of the first wheel and the second wheel in the first direction, wherein the holding assembly includes:

a first installation part, the first installation part being configured for the first shaft to pass through;

a second installation part, the second installation part being configured for the second shaft to pass through; and

a guide space to guide the stopper to move along the first direction.

8 . An electronic device comprising:

a first body;

a second body; and

a rotation structure connecting the first body and the second body for the first body and the second body to open and close mutually, the rotation structure including:

a first rotating shaft assembly;

a second rotating shaft assembly; and

a stopper, wherein:

the first rotating shaft assembly includes a first shaft and a first wheel arranged on the first shaft, a first groove being arranged on the first wheel;

the second rotating shaft assembly includes a second shaft and a second wheel arranged on the second shaft, the second shaft and the first shaft satisfying a parallel condition, a second groove being arranged on the second wheel;

a first protrusion and a second protrusion are arranged on the stopper, the first protrusion being limited to move in the first groove, the second protrusion being limited to move in the second groove;

the limit of the first groove to the first protrusion and the limit of the second groove to the second protrusion allow one of the first shaft and the second shaft to rotate;

the first groove includes a first linear groove segment and a first spiral groove segment communicating with the first linear groove segment, the second groove includes a second linear groove segment and a second spiral groove segment communicating with the second linear groove segment, the first linear groove segment and the second linear groove segment extend along a first direction, and the first direction is parallel to the first shaft or the second shaft;

when the first body is rotated relative to the second body from 0° to a specific angle, the first protrusion is limited to move in the first linear groove segment, and the second protrusion is limited to move in the second spiral groove segment, to lock the first shaft and rotate the second shaft;

when the first body is rotated relative to the second body from the specific angle to 360°, the first protrusion is limited to move in the first spiral groove segment, and the second protrusion is limited to move in the second linear groove segment, to rotate the first shaft and lock the second shaft; and

the specific angle is an angle between 0° and 360°.

9 . The electronic device of claim 8 , wherein:

the second groove further includes a third spiral groove segment communicating with the second spiral groove segment.

10 . The electronic device of claim 8 , wherein:

the first groove further includes a first circumferential groove segment communicating with the first linear groove segment,

the second groove further includes a fourth spiral groove segment communicating with the second spiral groove segment, and

when the first protrusion is limited to move in the first circumferential groove segment, the second protrusion is limited to move in the fourth spiral groove segment to limit the stopper from moving.

11 . The electronic device of claim 10 , wherein:

the first groove further includes a second circumferential groove segment communicating with the first linear groove segment,

the second groove further includes a fifth spiral groove segment communicating with the second spiral groove segment, and

when the first protrusion is limited to move in the second circumferential groove segment, the second protrusion is limited to move in the fifth spiral groove segment to limit the stopper from moving.

12 . The electronic device of claim 8 , wherein:

one of the first shaft and the second shaft rotates is a first rotation mode,

the limit of the first groove to the first protrusion and the limit of the second groove to the second protrusion cause the rotation structure to be in a second rotation mode, under the second rotation mode, the first shaft and the second shaft rotate simultaneously.

13 . The electronic device of claim 8 , wherein:

the stopper includes a first end, a second end arranged oppositely from the first end, a first arc-shaped groove arranged on the first end, and a second arc-shaped groove arranged on the second end, at least part of the first wheel being accommodated in the first arc-shaped groove, at least part of the second wheel being accommodated in the second arc-shaped groove, the first protrusion being arranged on the first arc-shaped groove, the second protrusion being arranged on the second arc-shaped groove.

14 . The electronic device of claim 8 , wherein the rotation structure further includes:

a holding assembly, the holding assembly being arranged to limit degree of freedom of the first wheel and the second wheel in the first direction, wherein the holding assembly includes:

a first installation part, the first installation part being configured for the first shaft to pass through;

a second installation part, the second installation part being configured for the second shaft to pass through; and

a guide space to guide the stopper to move along the first direction.

15 . A rotation structure comprising:

a first rotating shaft assembly configured to connect to a first body of an electronic device;

a second rotating shaft assembly configured to connect to a second body of the electronic device; and

a stopper, wherein:

the first rotating shaft assembly includes a first shaft and a first wheel arranged on the first shaft, a first groove being arranged on the first wheel;

the second rotating shaft assembly includes a second shaft and a second wheel arranged on the second shaft, the second shaft and the first shaft satisfying a parallel condition, a second groove being arranged on the second wheel;

a first protrusion and a second protrusion are arranged on the stopper, the first protrusion being limited to move in the first groove, the second protrusion being limited to move in the second groove;

the limit of the first groove to the first protrusion and the limit of the second groove to the second protrusion allow one of the first shaft and the second shaft to rotate;

the first groove includes a first linear groove segment and a first spiral groove segment communicating with the first linear groove segment, the second groove includes a second linear groove segment and a second spiral groove segment communicating with the second linear groove segment;

when the first body is rotated relative to the second body from 0° to a specific angle, the first protrusion is limited to move in the first linear groove segment, and the second protrusion is limited to move in the second spiral groove segment, to lock the first shaft and rotate the second shaft;

when the first body is rotated relative to the second body from the specific angle to 360°, the first protrusion is limited to move in the first spiral groove segment, and the second protrusion is limited to move in the second linear groove segment, to rotate the first shaft and lock the second shaft;

the specific angle is an angle between 0° and 360°; and

two ends of the first spiral groove segment are at different distances to a side, along an axial direction, of the first wheel, and two ends of the second spiral groove segment are at different distances to a side, along an axial direction, of the second wheel.