CN213176454U

CN213176454U - Pivot device and electronic device using same

Info

Publication number: CN213176454U
Application number: CN202021910979.3U
Authority: CN
Inventors: 朱瑞霖; 黄威荣; 洪舜裕
Original assignee: Shin Zu Shing Co ltd
Current assignee: Shin Zu Shing Co ltd
Priority date: 2020-09-04
Filing date: 2020-09-04
Publication date: 2021-05-11
Anticipated expiration: 2030-09-04

Abstract

A pivot device and an electronic device using the same are provided, wherein the pivot device is connected with two plate bodies and comprises a base, two bearing frames, a support, two rotating shafts, two torsion force generating pieces, two torsion force rod pieces and a synchronous mechanism. The two bearing frames are respectively positioned at two opposite sides of the base and are respectively fixedly connected with the two plate bodies. Each bearing frame is rotatably arranged on the base and rotates around a virtual axis, the virtual axis is positioned above the base, and each bearing frame is provided with a bearing frame sliding groove. The bracket is fixedly connected to the base. The two rotating shafts are parallel to each other and are pivoted on the bracket. The two torque generating pieces are respectively arranged on the two rotating shafts. One end of each torsion rod piece is fixedly connected with the corresponding rotating shaft, and the other end of each torsion rod piece is connected with the corresponding bearing frame sliding groove in a sliding manner. The synchronous mechanism is arranged between the two rotating shafts, so that the two rotating shafts can rotate simultaneously in opposite rotating directions. The base of the pivot device and the top surface of the support can be respectively provided with a first containing groove and a second containing groove which are communicated, when the two plate bodies of the electronic device are folded to have smaller relative included angle, the middle part of the flexible display part arranged on the two plate bodies can be contained in the first containing groove and the second containing groove without being pressed.

Description

Pivot device and electronic device using same

Technical Field

The present invention relates to a hinge device and an electronic device using the same, and more particularly, to a hinge device and an electronic device using the same.

Background

An electronic device includes a hinge and two boards. The hinge device is connected with the two plate bodies so that the two plate bodies can be relatively unfolded and folded. The electronic device can be further provided with a flexible display part which is arranged on one side surface of the hinge device and one side surface of the two plate bodies and correspondingly unfolded and folded along with the relative unfolding and folding of the two plate bodies, and the electronic device is called as a flexible display device. Generally speaking, when the two plate bodies are relatively unfolded to form a relative included angle of 180 degrees, the two end portions of the flexible display element are respectively attached and fixed to one side surface of the two plate bodies. However, since the flexible display member itself has a certain thickness, when the flexible display member is folded to a smaller angle with respect to the two plate bodies, the middle portion of the flexible display member may be pressed to become twisted or even damaged.

SUMMERY OF THE UTILITY MODEL

The present invention provides a hinge device and an electronic device using the same, so that when two plates of the electronic device are folded to a smaller relative angle, the middle portion of the flexible display member disposed on the two plates is not pressed.

To achieve the above object, the present invention provides a hinge device connected to two plates so that the two plates can be relatively unfolded and folded. The pivot device comprises a base, two bearing frames, a bracket, two rotating shafts, two torsion generating pieces, two torsion rod pieces and a synchronous mechanism. The two bearing frames are respectively positioned at two opposite sides of the base and are respectively fixedly connected with the two plate bodies. Each bearing frame is rotatably arranged on the base and rotates around a virtual axis, the virtual axis is positioned above the base, and each bearing frame is provided with a bearing frame sliding groove. The bracket is fixedly connected to the base. The two rotating shafts are parallel to each other and are pivoted on the bracket. The two torque generating pieces are respectively arranged on the two rotating shafts. One end of each torsion rod piece is fixedly connected with the corresponding rotating shaft, and the other end of each torsion rod piece is connected with the corresponding bearing frame sliding groove in a sliding manner. The synchronous mechanism is arranged between the two rotating shafts, so that the two rotating shafts can rotate simultaneously in opposite rotating directions.

In an embodiment of the present invention, the base includes two parallel base sliding grooves. Each base sliding groove is provided with a first guide part, each bearing frame is provided with a second guide part, the first guide part and the second guide part are arc-shaped, the curvature centers are positioned on corresponding virtual axes, and the second guide part can slide in a manner of being matched with the first guide part.

In an embodiment of the present invention, the hinge device further includes two limiting structures. Each limit structure limits the mutual sliding stroke of the corresponding first guide part and the corresponding second guide part.

In an embodiment of the present invention, each of the first guiding portions is a protruding rail, and each of the second guiding portions is a groove corresponding to the protruding rail.

In an embodiment of the present invention, each of the position-limiting structures includes a first stopping portion, a second stopping portion and a third stopping portion. The first stopping part is arranged at one end of the groove, so that the bearing frame can rotate downwards until the convex rail abuts against the first stopping part. The second blocking part and the third blocking part are respectively adjacent to the groove and the convex rail, so that the bearing frame can rotate upwards until the second blocking part and the third blocking part are mutually abutted.

In an embodiment of the present invention, each of the torque generating members includes a fastening member, an elastic member, and two concave cams. The fastener is adjustably fixedly sleeved on the corresponding rotating shaft. The two concave-convex wheels are sleeved on the corresponding rotating shafts, one concave-convex wheel of the two concave-convex wheels rotates with the corresponding rotating shaft at the same time, and the other concave-convex wheel is fixed and does not rotate. One end of the elastic piece is abutted to the fastening piece, the other end of the elastic piece is abutted to one of the two concave-convex wheels, the two concave-convex wheels are abutted to each other, and the other concave-convex wheel of the two concave-convex wheels is abutted to the bracket.

In an embodiment of the present invention, the hinge device further includes two tolerance compensation members. Each tolerance compensation piece is adjacent to the corresponding bearing frame sliding groove and is elastically abutted to the corresponding torsion rod piece.

In an embodiment of the present invention, the base further has two pivot holes. One end of each rotating shaft is pivoted on the bracket and the other end is pivoted on the corresponding pivoting hole.

In an embodiment of the present invention, the synchronous mechanism includes two first gears and a plurality of second gears. The first gears are fixedly sleeved on the corresponding rotating shafts, two adjacent second gears in the second gears are meshed with each other, and two outermost second gears in the second gears are meshed with the two first gears respectively.

The utility model discloses still provide an electron device, include pivot ware, two plate bodys and flexible display as before. The flexible display part is arranged on the top surfaces of the pivot device and the two plate bodies. The top surface of the base of the pivot device is concavely provided with a first containing groove, and the top surface of the support is concavely provided with a second containing groove communicated with the first containing groove.

In summary, according to the present invention, two supporting frames of the hinge device are respectively fixedly connected to two plate bodies of the electronic device, and each supporting frame is rotatably installed on the base and rotates around the virtual axis above the base, so that the two plate bodies can be relatively unfolded and folded. Two torsion generating pieces of the pivot device are respectively arranged on two rotating shafts which are parallel to each other and are pivoted on a support, the support is fixedly connected with the base, and two torsion rod pieces are arranged, one end of each torsion rod piece is fixedly connected with the corresponding rotating shaft, and the other end of each torsion rod piece is slidably connected with the corresponding bearing frame, so that the two plate bodies can be freely stopped at a default angle or position when being relatively unfolded and folded. In addition, the top surface of the base of the pivot device is concavely provided with a first containing groove, the top surface of the support is concavely provided with a second containing groove communicated with the first containing groove, and when two plate bodies of the electronic device are folded to form a smaller relative included angle, the middle part of the flexible display part arranged on the two plate bodies can be contained in the first containing groove and the second containing groove without being pressed.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

The following drawings are only schematic illustrations and explanations of the present invention, and do not limit the scope of the present invention.

Fig. 1 is a perspective view of an electronic device in a closed state according to an embodiment of the present invention.

Fig. 2 is a perspective view of an electronic device in a 90-degree state according to an embodiment of the present invention.

Fig. 3 is a perspective view of an electronic device in a 180-degree state according to an embodiment of the present invention.

Fig. 4 is a partial exploded view of an electronic device according to an embodiment of the present invention.

Fig. 5 is a perspective view of a hinge device in a 180-degree state according to an embodiment of the present invention.

Fig. 6 is a partial exploded view of a hinge according to an embodiment of the present invention.

Fig. 7 is an exploded view of the support, the rotating shaft, the torque generating member and the cooperating mechanism of the hinge shown in fig. 6.

Fig. 8 is a cross-sectional view of the support frame of the hinge device according to an embodiment of the present invention installed on the base.

Fig. 9 is a perspective view of a hinge device in a 90-degree state according to an embodiment of the present invention.

Fig. 10 is a perspective view of a hinge device in a closed state according to an embodiment of the present invention.

Fig. 11 is a partial exploded view of an electronic device according to another embodiment of the present invention.

Fig. 12 is a cross-sectional view of an electronic device in a 180-degree state according to another embodiment of the present invention.

Fig. 13 is a cross-sectional view of an electronic device at 90 degrees according to another embodiment of the present invention.

Fig. 14 is a cross-sectional view of an electronic device in a closed state according to another embodiment of the present invention.

Description of the reference symbols

1. 1': electronic device

2: plate body

3: back protecting shell

4: supporting plate

5: flexible display element

100: pivot device

10: base seat

11: the top surface

12: the first containing groove

13: base chute

14: a first guide part

15: perforation

16: third stopper portion

17: pin joint hole

20: bearing frame

20 a: joint segment

20 b: connecting segment

21: the second guide part

22. 23: perforation

24: slide groove of bearing frame

25: first stop part

26: second stopper portion

30: support frame

31: first support

32: second support

33. 34: pin joint hole

35: connecting segment

36: perforation

37: the second containing groove

40: rotating shaft

50: torsion generating member

51: fastening piece

52: elastic piece

53. 54: concave-convex wheel

60: torsion bar

61: special-shaped perforation

62: circular convex column

70: synchronous mechanism

71: first gear

72: second gear

80: tolerance compensation piece

C1, C2: a virtual axis.

Detailed Description

In the following embodiments, the same or similar reference numerals denote the same or similar components. In addition, directional terms referred to in the following examples, for example: upper, lower, left, right, front, rear, etc. are directions with reference to the drawings, and thus, the directional terms used are intended to be illustrative, and not restrictive.

Referring to fig. 1 to 3, fig. 1 to 3 are perspective views of an electronic device 1 in a closed state, a 90-degree state and a 180-degree state according to an embodiment of the present invention. The electronic device 1 includes a hinge 100 and two boards 2. The hinge device 100 is connected to the two panels 2, so that the two panels 2 can be relatively unfolded and folded, for example, from a closed state (as shown in fig. 1) to a 90-degree state (as shown in fig. 2), then further to a 180-degree state (as shown in fig. 3), or from a 180-degree state (as shown in fig. 3) to a 90-degree state (as shown in fig. 2), then further to a closed state (as shown in fig. 1). When the two panels 2 of the electronic device 1 are relatively unfolded and folded to make the angle between the two panels 2 a specific angle, it is said that the electronic device 1 and the hinge 100 are in the specific angle state, for example, the electronic device 1 and the hinge 100 shown in fig. 2 are in a 90-degree state, and the electronic device 1 and the hinge 100 shown in fig. 3 are in a 180-degree state. Specifically, as shown in fig. 1, in order to make the ends of the two boards 2 away from the hinge 100 contact, the two boards 2 must be folded relatively to form a negative angle, which means that the electronic device 1 and the hinge 100 are in the closed state.

Referring to fig. 4, fig. 4 is a partial exploded view of the electronic device 1 shown in fig. 3. In this embodiment, the electronic device 1 further includes a spine protection shell 3 and two support plates 4, and there are two hinge devices 100. The two pivotal devices 100 are fixed to two ends of the inner side of the back protective shell 3 by screws, and then two ends of each supporting plate 4 are fixed to the two pivotal devices 100 by screws, respectively. The spine protection cover 3 can prevent the entry of foreign matters to protect the two hinge devices 100, and the outer side of the spine protection cover 3 can provide an aesthetic appearance when the two plate bodies 2 are folded relatively. The two supporting plates 4 can provide support in the gap between the two hinge devices 100 when the two plates 2 are relatively unfolded to 180 degrees.

Referring to fig. 5 to 8, fig. 5 and 6 are a perspective view and a partial exploded view of a hinge device 100 in a 180 degree state according to an embodiment of the present invention, respectively, fig. 7 is an exploded view of a bracket 30, a rotating shaft 40, a torque generating member 50 and a synchronous mechanism 70 of the hinge device 100 shown in fig. 6, and fig. 8 is a cross-sectional view of the support frame 20 of the hinge device 100 shown in fig. 6 after being mounted on a base 10. As shown in fig. 5 and fig. 6, the hinge device 100 includes a base 10, two supporting frames 20, a bracket 30, two rotating shafts 40, two torque generating members 50, two torque rods 60 and a synchronous mechanism 70.

The base 10 includes a top surface 11, and the top surface 11 is concavely provided with a first accommodating groove 12. The base 10 further includes two parallel base sliding grooves 13, and each base sliding groove 13 penetrates the base 10 up and down. Each base sliding slot 13 is provided with a first guide portion 14 in the shape of a circular arc, and in this embodiment, two first guide portions 14 are respectively provided on two opposite side surfaces in the base sliding slot 13. The base 10 is further provided with a plurality of through holes 15, and the through holes 15 are used for screws to pass through to fix the base 10 to the inner side surface of the back protection shell 3 as shown in fig. 4.

Two supports 20 are respectively located at two opposite sides of the base 10, and each support 20 is rotatably installed on the base 10. Each shelf 20 includes an engagement section 20a and a connection section 20 b. Each joint section 20a is provided with a second guide portion 21 having a circular arc shape, in this embodiment, two second guide portions 21 are respectively provided on two opposite side surfaces of each joint section 20a, the second guide portions 21 can slide in cooperation with the first guide portions 14, and each support frame 20 is rotatably mounted on the base 10. Each connecting section 20b is provided with a plurality of through

holes

22 and 23, the through holes 22 are used for screws to pass through to fixedly connect the two supporting frames 20 with the two plate bodies 2 respectively as shown in fig. 4, and the through holes 23 are used for screws to pass through to fixedly connect the two ends of each supporting plate 4 with the two hinge devices 100 respectively as shown in fig. 4. Each connecting section 20b is also provided with a carrier runner 24.

The hinge device 100 further includes two limiting structures, each limiting structure limits the mutual sliding stroke of the corresponding first guiding portion 14 and the corresponding second guiding portion 21, i.e. limits the relative opening and closing angles of the base 10 and the corresponding support frame 20. In the present embodiment, each first guiding portion 14 is a convex rail, each second guiding portion 21 is a groove corresponding to the convex rail, and the second guiding portion 21 (groove) and the first guiding portion 14 (convex rail) can slide in cooperation with each other through the corresponding groove and the convex rail. As shown in fig. 6 and 8, each of the limiting structures includes a first stopping portion 25, a second stopping portion 26, and a third stopping portion 16. The first stop portion 25 is disposed at one end of the second guiding portion 21 (groove), so that the supporting frame 20 can rotate downward until the first guiding portion 14 (convex rail) abuts against the first stop portion 25 (the hinge device 100 is in a 180-degree state as shown in the upper drawing of fig. 8). The second stopping portion 26 is adjacent to the second guiding portion 21 (concave groove), and the third stopping portion 16 is adjacent to the first guiding portion 14 (convex rail), so that the frame 20 can rotate upward until the second stopping portion 26 and the third stopping portion 16 abut against each other (as shown in the lower drawing of fig. 8, the hinge device 100 is in the closed state).

Specifically, as shown in fig. 8, taking the first guide portion 14 (convex rail) disposed on the base chute 13 near the right side of the base 10 and the second guide portion 21 (concave groove) disposed on the support frame 20 at the right side of the base 10 as an example, the first guide portion 14 (convex rail) and the second guide portion 21 (concave groove) are both arc-shaped, the curvature center is located at the virtual axis C1, and the virtual axis C1 is located above the base 10 and is parallel to the top surface 11 of the base 10 and perpendicular to the first guide portion 14 (convex rail) and the second guide portion 21 (concave groove). Therefore, the rack 20 located at the right side of the base 10 is rotatably mounted on the base 10 and rotates around the virtual axis C1, the rack 20 located at the left side of the base 10 is rotatably mounted on the base 10 and rotates around another virtual axis C2, and the virtual axes C1 and C2 are symmetrically distributed with respect to the base 10.

The bracket 30 is fixedly connected to the base 10, and the two rotating shafts 40 are parallel to each other and pivotally installed on the bracket 30. As shown in fig. 6 and 7, in the present embodiment, the bracket 30 includes a first bracket 31 and a second bracket 32. The first frame 31 has a plurality of pivot holes 33, and the second frame 32 has a plurality of corresponding pivot holes 34. The two rotating shafts 40 are parallel to each other, and each rotating shaft 40 passes through the corresponding pivot holes 33 and 34 of the first bracket 31 and the second bracket 32 and is pivoted on the bracket 30. The second bracket 32 extends outward to form a connecting section 35, the connecting section 35 is provided with a through hole 36, the through hole 36 is used for a screw to pass through to fix the second bracket 32 to the base 10, and further to fix the bracket 30 to the base 10, in this embodiment, the screw passes through the through hole 36 and the through hole 15 shown in fig. 6 to fix the bracket 30 to the base 10, and at the same time, the base 10 is fixed to the inner side surface of the back protection shell 3 as shown in fig. 4. In addition, as shown in fig. 6, the base 10 further has two pivot holes 17, one end of each of the rotation shafts 40 is pivotally disposed on the bracket 30, and the other end is pivotally disposed on the corresponding pivot hole 17, so that the two rotation shafts 40 can rotate more stably. As shown in fig. 6, a second receiving groove 37 is further concavely formed on the top surface of the bracket 30, and when the bracket 30 is fixedly connected to the base 10, the second receiving groove 37 is communicated with the first receiving groove 12, and its operation will be described later.

The two torque generating members 50 are respectively provided to the two rotation shafts 40. In the present embodiment, each torque generating member 50 includes a fastening member 51, an elastic member 52, and two

concave cams

53 and 54. The fasteners 51 are adjustably fixedly sleeved on the corresponding rotating shafts 40; in the embodiment, the fastening member 51 is a nut and has an internal thread, one end of the rotating shaft 40 is provided with an external thread corresponding to the internal thread, the fastening member 51 is fixedly sleeved on the corresponding rotating shaft 40 through the corresponding internal thread and external thread, and the position of the fastening member 51 can be adjusted to change the magnitude of the generated torque. The elastic element 52 is sleeved on the corresponding rotating shaft 40; in this embodiment, the elastic member 52 is a spring. The two concave-

convex wheels

53 and 54 are sleeved on the corresponding rotating shaft 40, one concave-convex wheel 53 of the two concave-

convex wheels

53 and 54 rotates with the corresponding rotating shaft 40 at the same time, and the other concave-convex wheel 54 is fixed and does not rotate; in the embodiment, the rotating shaft 40 is a special-shaped shaft, the concave-convex wheel 53 has a corresponding special-shaped through hole, so the concave-convex wheel 53 is clamped and sleeved on the corresponding rotating shaft 40 and rotates with the corresponding rotating shaft 40, the concave-convex wheel 54 has a circular through hole with a diameter larger than the diameter of the special-shaped shaft, and the concave-convex wheels 54 of the two torque generating members 50 are connected with each other, so the concave-convex wheel 54 is sleeved on the corresponding rotating shaft 40 and fixed without rotating. One end of the elastic member 52 abuts against the fastening member 51 and the other end abuts against one of the concave-convex cams 54 of the two concave-

convex cams

53 and 54, the two concave-

convex cams

53 and 54 abut against each other, and the other concave-convex cam 53 of the two concave-

convex cams

53 and 54 abuts against the bracket 30.

One end of each torsion bar 60 is fixedly connected to the corresponding rotating shaft 40, and the other end is slidably connected to the corresponding support frame sliding groove 24. In the embodiment, one end of each torsion bar 60 is provided with a special-shaped through hole 61 to be engaged and sleeved on the corresponding rotating shaft 40, and the other end of each torsion bar 60 is provided with a circular convex column 62 to be slidably connected with the corresponding support frame sliding groove 24.

The synchronization mechanism 70 is disposed between the two shafts 40, so that the two shafts 40 can rotate in opposite directions simultaneously. In the present embodiment, the synchronous mechanism 70 includes two first gears 71 and a plurality of second gears 72. Each first gear 71 is fixedly sleeved on the corresponding rotating shaft 40, two adjacent second gears 72 of the second gears 72 are engaged with each other, and two outermost second gears 72 of the second gears 72 are respectively engaged with the two first gears 71. Specifically, each first gear 71 has a special-shaped through hole and is engaged with the corresponding rotating shaft 40, and each first gear 71 is pivoted to the bracket 30 along with the corresponding rotating shaft 40 and is located between the first bracket 31 and the second bracket 32; the number of the second gears 72 is four, and the second gears respectively pass through the corresponding pivot holes 33 and 34 of the first bracket 31 and the second bracket 32 to be pivoted on the bracket 30 and located between the first bracket 31 and the second bracket 32. The two first gears 71 are rotated simultaneously in opposite rotational directions by the second gear 72, so that the two shafts 40 are also rotated simultaneously in opposite rotational directions.

When the two boards 2 of the electronic device 1 are unfolded and folded, the rotation of one board 2 drives a support 20 to rotate, so that the circular protrusion 62 of a torque rod 60 starts to slide along a support sliding slot 24 to force a rotating shaft 40 fixedly connected with the special-shaped through hole 61 to start to rotate. By the synchronous mechanism 70, the other rotating shaft 40 starts to rotate in the opposite rotating direction, so that the other rotating shaft 40 fixedly connected to the special-shaped through hole 61 of the other torsion bar 60 starts to rotate to force the circular convex column 62 to slide along the other supporting frame sliding slot 24, and further the other supporting frame 20 rotates to drive the other plate 2 to rotate. In other words, by the synchronous mechanism 70, the two boards 2 of the electronic device 1 rotate simultaneously in opposite rotation directions, the two supports 20 of the hinge 100 rotate simultaneously in opposite rotation directions, the two rotation shafts 40 rotate simultaneously in opposite rotation directions, and the two torsion bars 60 rotate simultaneously in opposite rotation directions.

In order to allow the circular protruding pillar 62 of each torsion bar 60 to smoothly slide along the corresponding rack sliding slot 24 of the rack 20, the diameter of the circular protruding pillar 62 is smaller than the slot width of the rack sliding slot 24 and has a certain tolerance. However, since the rack 20 rotates around the virtual axis C1 (C2) and the virtual axis C1 (C2) is located above the top surface 11 of the base 10, and one end of the torsion bar 60 rotates around the rotating shaft 40 and the axis of the rotating shaft 40 is located below the top surface 11 of the base 10, that is, each torsion bar 60 and the corresponding rack 20 rotate around different axes, this may cause the circular protruding pillar 62 of the torsion bar 60 to collide with each other to generate noise due to tolerance when sliding along the rack sliding slot 24. In order to solve the noise problem, the hinge 100 further includes two tolerance compensators 80, each tolerance compensator 80 abuts the corresponding bracket slot 24 and elastically abuts the corresponding circular protruding pillar 62 of the torsion bar 60. In the present embodiment, each tolerance compensator 80 is a sheet-like elastic member.

Referring to fig. 5, fig. 9 and fig. 10, fig. 5, fig. 9 and fig. 10 are respectively perspective views of a hinge 100 in a 180 degree, 90 degree and closed state according to an embodiment of the present invention. As can be seen, when the circular protruding pillar 62 of each torque rod 60 slides along the corresponding carrier sliding slot 24, the circular protruding pillar 62 is continuously elastically abutted by the corresponding tolerance compensation member 80, so that noise caused by collision is not generated.

Referring to fig. 11, fig. 11 is a partial exploded view of an electronic device 1' according to another embodiment of the present invention. The electronic device 1' is a flexible display device, which further includes a flexible display member 5 compared to the electronic device 1 shown in fig. 3 and 4. The flexible display device 5 is disposed on the hinge 100 and one side (the top side in fig. 11) of the two boards 2. As the two boards 2 of the electronic device 1' are relatively unfolded and folded, the flexible display 5 is also relatively unfolded and folded.

Referring to fig. 12 to 14, fig. 12 to 14 are side views of the electronic device 1' shown in fig. 11 at 180 degrees, 90 degrees and a closed state, respectively, and the right plate 2, the back protective shell 3 and the two supporting plates 4 are omitted. As can be seen from the figure, when the two boards 2 of the electronic device 1' are folded to have a smaller relative angle (for example, the closed state shown in fig. 14), the middle portion of the flexible display 5 is received in the first receiving slot 12 and the second receiving slot 37, which are communicated with the hinge 100, without being pressed.

Although the present invention has been described with reference to the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is capable of other modifications and variations within the spirit and scope of the invention as defined by the appended claims.

Claims

1. A kind of pivot device, connect to two boards, make said two boards can relatively expand and receive, characterized by that the said pivot device includes:

a base;

the two bearing frames are respectively positioned on two opposite sides of the base and are respectively fixedly connected with the two plate bodies, each bearing frame is rotatably arranged on the base and rotates around a virtual axis, the virtual axis is positioned above the base, and each bearing frame is provided with a bearing frame sliding groove;

the bracket is fixedly connected to the base;

the two rotating shafts are parallel to each other and are pivoted on the bracket;

two torque generating members respectively provided on the two rotating shafts;

one end of each torsion rod piece is fixedly connected with the corresponding rotating shaft, and the other end of each torsion rod piece is connected with the corresponding bearing frame sliding groove in a sliding manner; and

and the synchronous mechanism is arranged between the two rotating shafts, so that the two rotating shafts can rotate simultaneously in opposite rotating directions.

2. The hinge device as claimed in claim 1, wherein the base comprises two parallel base sliding slots, each of the base sliding slots has a first guiding portion, each of the supporting frames has a second guiding portion, the first guiding portion and the second guiding portion are circular arc-shaped, the center of curvature of the first guiding portion is located at the corresponding virtual axis, and the second guiding portion is slidably engaged with the first guiding portion.

3. The hinge of claim 2, wherein the hinge further comprises two limiting structures, each limiting structure limits the distance of the corresponding first guiding portion and the corresponding second guiding portion to slide relative to each other.

4. The hinge of claim 3, wherein each of the first guiding portions is a rail and each of the second guiding portions is a groove corresponding to the rail.

5. The hinge assembly of claim 4, wherein each of the position-limiting structures comprises a first stopping portion, a second stopping portion and a third stopping portion, the first stopping portion is disposed at one end of the recess, such that the frame can rotate downward until the rail abuts against the first stopping portion, the second stopping portion and the third stopping portion respectively abut against the recess and the rail, such that the frame can rotate upward until the second stopping portion and the third stopping portion abut against each other.

6. The hinge of claim 1, wherein each of the torque generating members comprises a fastening member, an elastic member and two cams, the fastening member is adjustably and fixedly sleeved on the corresponding rotating shaft, the two cams are sleeved on the corresponding rotating shaft, one cam of the two cams rotates simultaneously with the corresponding rotating shaft while the other cam of the two cams is fixed and does not rotate, one end of the elastic member abuts against the fastening member and the other end abuts against one cam of the two cams, the two cams abut against each other, and the other cam of the two cams abuts against the bracket.

7. The hinge of claim 1, further comprising two tolerance compensation members, each of said tolerance compensation members abutting a corresponding said carrier slot and resiliently abutting a corresponding said torsion bar member.

8. The hinge device of claim 1, wherein the base further has two pivot holes, one end of each of the pivot shafts is pivotally disposed on the bracket and the other end is pivotally disposed on the corresponding pivot hole.

9. The hub of claim 1, wherein the synchronous mechanism comprises two first gears and a plurality of second gears, each of the first gears is fixedly secured to the corresponding rotating shaft, two adjacent second gears of the plurality of second gears are engaged with each other, and two outermost second gears of the plurality of second gears are engaged with the two first gears, respectively.

10. An electronic device, comprising the hinge device of any one of claims 1 to 9, the two boards, and a flexible display member, wherein the flexible display member is disposed on top surfaces of the hinge device and the two boards, a first receiving groove is recessed on a top surface of the base of the hinge device, and a second receiving groove communicated with the first receiving groove is recessed on a top surface of the bracket.