Synchronization mechanism, rotating shaft mechanism, and electronic device

Patent metadata

Field	Value
Publication number	US-12517557-B2
Application number	US-202318264665-A
Country	US
Kind code	B2
Filing date	Jan 6, 2023
Priority date	Jan 18, 2022
Publication date	Jan 6, 2026
Grant date	Jan 6, 2026

Abstract

Embodiments of this application provide a synchronization mechanism, a rotating shaft mechanism, and an electronic device. The synchronization mechanism includes a swing arm and a slider, the swing arm rotates around an axis, the slider is slidably disposed in a direction parallel to the axis, a spiral groove is disposed on the swing arm, and a protruding part that fits the spiral groove is disposed on the slider.

First claim

What is claimed is:

1 . A synchronization mechanism, comprising a base, a slider, and a first swing arm and a second swing arm that are located on both sides of the slider, wherein both the first swing arm and the second swing arm are configured to rotate relative to the base;
wherein the slider is slidably disposed in a direction parallel to an axial direction of rotation of the first swing arm and the second swing arm; first fitting parts are symmetrically disposed on both the first swing arm and the second swing arm along a center line of the base, second fitting parts are symmetrically on both sides of the slider along the center line, and the second fitting parts correspond to the first fitting parts; and the synchronization mechanism is configured in a manner that when the first swing arm and the second swing arm rotate relative to each other, the first fitting parts and the second fitting parts fit to drive the slider to slide in the axial direction in a manner that rotation angles of the first swing arm and the second swing arm relative to the base stay consistent; wherein the synchronization mechanism further comprises a first rotating shaft and a second rotating shaft that are mounted on the base, the first swing arm is configured to rotate around the first rotating shaft, the second swing arm is configured to rotate around the second rotating shaft, and the slider is configured to slide along the first rotating shaft and the second rotating shaft; wherein first sleeves are disposed on both sides of the slider, the first sleeves on both sides are respectively sleeved on the first rotating shaft and the second rotating shaft, and the slider is configured to slide along the first rotating shaft and the second rotating shaft; and wherein the slider has four corner regions, one of the first sleeves is disposed in each of the four corner regions, and the second fitting part is disposed between two of the first sleeves on each side.

2 . The synchronization mechanism according to claim 1 , wherein center positions of the second fitting parts on both sides of the slider in a thickness direction are at a same height as axes of the first rotating shaft and the second rotating shaft.

3 . The synchronization mechanism according to claim 1 , wherein second sleeves are disposed at both ends of each of the first swing arm and the second swing arm, a protrusion is disposed at a middle part in the axial direction, a corresponding one of the first fitting parts is disposed on the protrusion, the first rotating shaft and the second rotating shaft respectively pass through the two corresponding second sleeves and the protrusion, and the corresponding one of the first sleeves is configured to slide between the second sleeve and the protrusion.

4 . The synchronization mechanism according to claim 1 , wherein each of the first fitting parts is a spiral groove, and each of the second fitting parts is a protruding part.

5 . The synchronization mechanism according to claim 4 , wherein at least one protruding part is disposed on each side of the slider, and each protruding part corresponds to one spiral groove, or one spiral groove corresponds to more than one protruding part.

6 . The synchronization mechanism according to claim 4 , wherein a surface that is of the protruding part and that faces the spiral groove is a spiral curved surface that fits a groove bottom surface of the spiral groove.

7 . The synchronization mechanism according to claim 4 , wherein a width of the protruding part and a width of the spiral groove are equal.

8 . The synchronization mechanism according to claim 1 , wherein third sleeves are disposed at both ends on both sides of the base, and the first rotating shaft and the second rotating shaft are inserted into two third sleeves on a corresponding side.

9 . The synchronization mechanism according to claim 8 , wherein the slider is in slide fit with the base in the axial direction.

10 . The synchronization mechanism according to claim 9 , wherein the slider is disposed between the base and a rotating shaft pedestal, a groove extends in a bottom part of the slider, and the groove is in slide fit with the base; or a groove extends in the base, and a sliding platform that fits the groove is disposed on the bottom part of the slider.

11 . The synchronization mechanism according to claim 10 , wherein the groove is a dovetail groove, a protrusion is disposed on the base or the slider, and the protrusion is in slide fit with the dovetail groove.

12 . A rotating shaft mechanism, wherein the rotating shaft mechanism comprises a rotating shaft pedestal and a shaft cover, at least one group of synchronization mechanisms is disposed between the rotating shaft pedestal and the shaft cover;
wherein each synchronization mechanism comprises a base, a slider, and a first swing arm and a second swing arm that are located on both sides of the slider, and both the first swing arm and the second swing arm are configured to rotate relative to the base, and the slider is slidably disposed in a direction parallel to an axial direction of rotation of the first swing arm and the second swing arm; first fitting parts are symmetrically disposed on both the first swing arm and the second swing arm along a center line of the base, second fitting parts are symmetrically on both sides of the slider along the center line, and the second fitting parts correspond to the first fitting parts; wherein each synchronization mechanism is configured in a manner that when the first swing arm and the second swing arm rotate relative to each other, the first fitting parts and the second fitting parts fit to drive the slider to slide in the axial direction, in a manner that rotation angles of the first swing arm and the second swing arm relative to the base stay consistent wherein each synchronization mechanism further comprises a first rotating shaft and a second rotating shaft that are mounted on the base, the first swing arm is configured to rotate around the first rotating shaft, the second swing arm is configured to rotate around the second rotating shaft, and the slider is configured to slide along the first rotating shaft and the second rotating shaft; wherein in each synchronization mechanism, first sleeves are disposed on both sides of the slider, the first sleeves on both sides are respectively sleeved on the first rotating shaft and the second rotating shaft, and the slider is configured to slide along the first rotating shaft and the second rotating shaft; and wherein in each synchronization mechanism, the slider has four corner regions, the first sleeve is disposed in each of the four corner regions, and the second fitting part is disposed between two first sleeves on each side.

13 . The rotating shaft mechanism according to claim 12 , wherein each base is disposed between the shaft cover and the rotating shaft pedestal of the rotating shaft mechanism.

14 . The rotating shaft mechanism according to claim 13 , wherein each base is fixedly connected to one of the shaft cover and the rotating shaft pedestal, or each base, the shaft cover, and the rotating shaft pedestal are integrally disposed.

15 . An electronic device, wherein the electronic device comprises a flexible foldable screen, a middle frame supporting the flexible foldable screen, and a rotating shaft mechanism;
wherein the rotating shaft mechanism comprises a rotating shaft pedestal and a shaft cover, at least one group of synchronization mechanisms is disposed between the rotating shaft pedestal and the shaft cover; wherein each synchronization mechanism compr

Assignees

• Honor Device Co Ltd

Inventors

• Zhang Yaolei
• Zhou Guotong
• Yan Bin
• Huo Wenlong

Classifications

• G09F9/301

  flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED · CPC title

• F16H25/12

  with reciprocation along the axis of rotation, e.g. gearings with helical grooves and automatic reversal · CPC title

• H04M1/022 Primary

  The hinge comprising two parallel pivoting axes · CPC title

• H04M1/0268

  including a flexible display panel · CPC title

• H05K5/0226

  Hinges · CPC title