Patent ID: 9507387
Filing Date: 2016-11-29
CPC Classification: E05Y,G06F,Y10T

Claim Text:
1. A pivot mechanism configured to rotatably couple a base of an electronic device to a cover of the electronic device, the pivot mechanism comprising: a connector; a first rotation assembly rotatably coupled to the base and fixedly attached to the connector; and a second rotation assembly fixedly coupled to the cover and rotatably coupled to the connector; the first rotation assembly and the second rotation assembly cooperatively having a first configuration in which the angle between the base and the cover are at a minimum angle; the first rotation assembly being configured to rotate relative to the base and the second rotation assembly being configured to remain fixed relative to the connector as the angle between the cover and the base increases from the minimum angle to a first predetermined angle; the second rotation assembly being configured to rotate relative to the connector as the angle between the cover and base increases from the first predetermined angle to a second predetermined angle; wherein the first rotation assembly comprises a first rotation shaft, a first sector wheel installed on the first rotation shaft, and a positioning member sleeved on the first rotation shaft; the first rotation shaft has a first end portion fixed to the connector and a second end portion rotatably connected to the base; the first sector wheel comprises a first stopping surface and a second stopping surface; the positioning member is fixed to the base and comprises a first limiting block capable of moving between the first stopping surface and the second stopping surface; when the cover gradually rotates to the first predetermined angle, the first sector wheel rotates relative to the first limiting block to make the first limiting block resist the second stopping surface and to prevent the first rotation shaft from moving relative to the positioning member; and wherein the second rotation assembly comprises a second rotation shaft and a second sector wheel installed on the first rotation shaft; the second rotation shaft has one end rotatably connected to the connector and the other end fixed to the cover; the first sector wheel comprises a third stopping surface and a fourth stopping surface, the connector comprises a second limiting block capable of moving between the third stopping surface and the fourth stopping surface; when the cover rotates from the first predetermined angle to the second predetermined angle, the second sector wheel rotates relative to the second limiting block to make the second limiting block resist the fourth stopping surface and prevent the second rotation shaft from moving relative to the connector.