Synchronization mechanism and folding hinge

1 . A synchronization mechanism, comprising:

a base, wherein the base comprises a spindle seat and a stop rack, wherein two first rotation portions are respectively provided on two sides of the spindle seat along a width direction; the stop rack is detachably connected to the spindle seat, and two second rotation portions are respectively provided on two sides of the stop rack along the width direction, wherein one of the stop rack or the spindle seat is provided with an overlapping groove, the other one of the stop rack or the spindle seat is provided with an inserting protrusion, and the inserting protrusion is inserted into the overlapping groove;

two swing arms, wherein the two swing arms are rotatably disposed on the two first rotation portions respectively;

two slide rail arms, wherein the two slide rail arms are synchronously and rotatably disposed on the two second rotation portions respectively, and each of the two slide rail arms is provided with a slide groove; and

two connecting rod shafts, wherein each of the two connecting rod shafts comprises a first end and a second end, the first end of each of the two connecting rod shafts is connected to a respective one of the two swing arms, the second end of each of the two connecting rod shafts is in a sliding fit with the slide groove of a respective one of the two slide rail arms, and the two slide rail arms are configured to rotate to respectively drive the two swing arms.

2 . The synchronization mechanism according to claim 1 , wherein the overlapping groove is disposed on the spindle seat, the overlapping groove passes through the spindle seat along a direction facing the stop rack, the overlapping groove is a stepped groove, and two first limit portions opposite to each other are formed at an opening of the stepped groove; and

the inserting protrusion is disposed on the stop rack, the inserting protrusion comprises an inserting body extending along a length direction and second limit portions disposed at an end of the inserting body and extending along the width direction, a width of the inserting protrusion at the second limit portions is greater than a width of the overlapping groove at the two first limit portions, and the second limit portions are disposed on one side facing away from the opening of the overlapping groove.

3 . The synchronization mechanism according to claim 1 , wherein each of the two swing arms comprises a swing body and a connecting portion connected to one end of the swing body, the connecting portion is in a rotation fit with a respective one of the two first rotation portions, the swing body is provided with a swing hole, and each of the two connecting rod shafts passes through and is secured within the swing hole.

4 . The synchronization mechanism according to claim 3 , wherein the swing body is provided with an arc-shaped groove passing through the swing body along a length direction, each of the two swing arms further comprises a cover plate covering the arc-shaped groove, the swing hole is formed by an enclosure between the cover plate and the arc-shaped groove, and a length of the cover plate is less than a length of the arc-shaped groove in the length direction.

5 . The synchronization mechanism according to claim 3 , wherein each of the two connecting rod shafts has a rod body and a stop portion disposed at an end of the rod body, wherein the rod body passes through the swing hole, an outer diameter of the stop portion is greater than an outer diameter of the swing hole, and the stop portion is located on one side of the cover plate facing away from a respective one of the two slide rail arms.

6 . The synchronization mechanism according to claim 5 , wherein an end surface of the stop portion is fan-shaped and disposed around an outer periphery of the rod body, and two ends of the stop portion around an axis of the stop portion abut against the swing body and are located on two sides of the arc-shaped groove, respectively.

7 . The synchronization mechanism according to claim 5 , wherein the rod body comprises a first shaft section and a second shaft section, a diameter of the first shaft section is greater than a diameter of the second shaft section and greater than a width of the slide groove, the stop portion is disposed at an end of the first shaft section facing away from the second shaft section, the second shaft section is slidably disposed in the slide groove, and the first shaft section is in an interference fit with the swing hole or is bonded to the swing hole.

8 . The synchronization mechanism according to claim 1 , wherein each of the two slide rail arms rotates between an initial position and an end position, and the slide groove is bent downward gradually along a direction facing away from the base.

9 . The synchronization mechanism according to claim 1 , wherein the synchronization mechanism further comprises a driving shaft, the stop rack comprises a stop body and two hinged protrusions disposed on two sides of the stop body respectively, each of the two second rotation portions comprises a hinged hole passing through a respective one of the two hinged protrusions along the length direction, two hinged blocks opposite to each other are provided on one end of each of the at least two slide rail arms, a hinged groove is formed between the two hinged blocks, each of the two hinged blocks is provided with a rotation hole along the length direction, each of the two hinged protrusions is inserted into the hinged groove, and the driving shaft passes through the hinged hole and the rotation hole.

10 . The synchronization mechanism according to claim 9 , wherein each of the two hinged protrusions is provided with a first limit protrusion, the first limit protrusion is arc-shaped and disposed around an outer periphery of the hinged hole, each of the two hinged blocks is provided with a second limit protrusion, and the second limit protrusion is arc-shaped and disposed around an outer periphery of the rotation hole; and

each of the two slide rail arms rotates between an initial position and an end position with respect to the stop rack, in response to each of the two slide rail arms being at the initial position, one end of the first limit protrusion abuts against one end of the second limit protrusion, and in response to each of the two slide rail arms being at the end position, the other end of the first limit protrusion abuts against the other end of the second limit protrusion.

11 . The synchronization mechanism according to claim 9 , wherein the driving shaft comprises a shaft body and a shaft limit portion, an outer diameter of the shaft body is less than an outer diameter of the shaft limit portion, the shaft body passes through the two hinged blocks and the rotation hole, the shaft limit portion is located on a side of a respective one of the two slide rail arms facing the spindle seat, and the spindle seat is provided with an avoidance notch for accommodating the shaft limit portion.

12 . The synchronization mechanism according to claim 11 , further comprising two torsion assemblies, wherein each of the two torsion assemblies comprises two intermediate gears engaging with each other and two main gears disposed on outer sides of the two intermediate gears respectively, the two slide rail arms on the stop rack are connected to the two main gears respectively and rotate around two axes of the two main gears, respectively, the two slide rail arms are relatively secured to the two main gears in circumferential directions of the two main gears respectively, the two intermediate gears are rotatably disposed on the stop rack, the two intermediate gears engage with the two main gears respectively, each of the two main gears is provided with a gear hole, and the driving shaft passes through two gear holes of the two main gears.

13 . The synchronization mechanism according to claim 12 , wherein each of the two main gears is provided with a limit protruding block located on a circumferential side of the gear hole, each of the two hinged blocks is provided with a limit groove disposed on a circumferential side of the rotation hole, and the limit protruding block is inserted into the limit groove; and

wherein the limiting groove of one of the two hinged blocks communicates with the rotation hole, and the limiting groove of the other one of the two hinged blocks is spaced from the rotation hole.

14 . A folding hinge, comprising two door plates, two housing connecting rods and a synchronization mechanism, wherein the synchronization mechanism comprises:

a base, wherein the base comprises a spindle seat and a stop rack, wherein two first rotation portions are respectively provided on two sides of the spindle seat along a width direction; the stop rack is detachably connected to the spindle seat, and two second rotation portions are respectively provided on two sides of the stop rack along the width direction, wherein one of the stop rack or the spindle seat is provided with an overlapping groove, the other one of the stop rack or the spindle seat is provided with an inserting protrusion, and the inserting protrusion is inserted into the overlapping groove;

two swing arms, wherein the two swing arms are rotatably disposed on the two first rotation portions respectively;

two slide rail arms, wherein the two slide rail arms are synchronously and rotatably disposed on the two second rotation portions respectively, and each of the two slide rail arms is provided with a slide groove; and

two connecting rod shafts, wherein each of the two connecting rod shafts comprises a first end and a second end, the first end of each of the two connecting rod shafts is connected to a respective one of the two swing arms, the second end of each of the two connecting rod shafts is in a sliding fit with the slide groove of a respective one of the two slide rail arms, and the two slide rail arms are configured to rotate to respectively drive the two swing arms; and

wherein the two housing connecting rods are located on two sides of the base along the width direction respectively, are in a sliding fit with the two slide rail arms respectively and are hinged with the two swing arms respectively, and the two door plates are located on the two sides of the base along the width direction respectively, are in a rotation fit with the two housing connecting rods respectively and are in a rotation fit with the two connecting rod shafts respectively.

15 . The folding hinge according to claim 14 , wherein a rotation groove is provided on a side of each of the two housing connecting rods facing a respective one of the two swing arms, one first connecting hole is provided on each of opposite sidewalls of the rotation groove, a rotation protrusion is provided on a side of the respective one of the two swing arms facing a respective one of the two housing connecting rods, a second connecting hole passes through the rotation protrusion along a length direction, the rotation protrusion is inserted into the rotation groove, a connecting shaft passes through the second connecting hole, and two ends of the connecting shaft are located in two first connecting holes respectively.

16 . The folding hinge according to claim 15 , further comprising a median plate, wherein the spindle seat is provided with an overlapping groove, the stop rack is provided with an inserting protrusion, the inserting protrusion is inserted into the overlapping groove, the overlapping groove passes through the spindle seat along a thickness direction, and the median plate is soldered onto the spindle seat and covers the overlapping groove.

17 . The folding hinge according to claim 16 , wherein two first limit portions opposite to each other are formed at an opening of a stepped groove; and

the inserting protrusion comprises an inserting body extending along a length direction and second limit portions disposed at an end of the inserting body and extending along the width direction, a width of the inserting protrusion at the second limit portions is greater than a width of the overlapping groove at the two first limit portions, and the second limit portions are disposed on one side facing away from the opening of the overlapping groove.

18 . The folding hinge according to claim 17 , wherein each of the two swing arms comprises a swing body and a connecting portion connected to one end of the swing body, the connecting portion is in a rotation fit with a respective one of the two first rotation portions, the swing body is provided with a swing hole, and each of the two connecting rod shafts passes through and is secured within the swing hole.

19 . The synchronization mechanism according to claim 14 , wherein each of the two slide rail arms is provided with a slide protrusion, each of the two housing connecting rods is provided with a slide rail groove, the slide protrusion is configured to be in a sliding fit with the slide rail groove of a respective one of the two housing connecting rods, and the slide protrusion is provided with a notch for avoidance of the respective one of the two housing connecting rods.