CN214661465U

CN214661465U - Split hinge structure

Info

Publication number: CN214661465U
Application number: CN202120543929.4U
Authority: CN
Inventors: 张瑞鸿; 张信忠; 林诗尧; 陈光日; 周志成
Original assignee: Jarllytec Co Ltd
Current assignee: Jarllytec Co Ltd
Priority date: 2021-03-16
Filing date: 2021-03-16
Publication date: 2021-11-09
Anticipated expiration: 2031-03-16

Abstract

The utility model relates to a split hinge structure, wherein a first seat body is provided with a first arc-shaped guide groove and a second arc-shaped guide groove for limiting a first arc-shaped part and a second arc-shaped part of a first adapter and a second adapter respectively in a relative arc-shaped swinging mode, and the first adapter and the second adapter respectively comprise a plurality of transversely stacked first adapter pieces and second adapter pieces; the first arc-shaped connecting rod and the second arc-shaped connecting rod are respectively adjacent to the first side surface of the first seat body, and one end of the first arc-shaped connecting rod and one end of the second arc-shaped connecting rod are respectively pivoted with the first supporting frame and the second supporting frame; one ends of a first gear connecting piece and a second gear connecting piece of the gear set are respectively pivoted with a first shaft and a second shaft, and the other ends of the first gear connecting piece and the second gear connecting piece are respectively pivoted with the other ends of the first arc-shaped connecting rod and the second arc-shaped connecting rod through a third pivot and a fourth pivot.

Description

Split hinge structure

Technical Field

The present invention relates to a hinge, and more particularly to a split hinge structure of a foldable electronic device.

Background

The display and the base of a conventional foldable electronic device, such as a notebook computer, are respectively connected to the side of the display and the base through a single-axis hinge to form a pivot, so that the display can be turned over and opened or closed relative to the base. In addition to the conventional notebook computer, especially for the existing dual touch screen computer, the design direction of the folding device is improved mainly to overcome the disadvantages of the dual touch screen computer, so that the dual screens can approach each other in the opening and closing process, and the gap between the dual screens is reduced, thereby preventing the internal structure of the hinge or the pin joint from being exposed.

As shown in the patent of taiwan patent publication I697629, the first and second arc-shaped guide slots are disposed on an arc-shaped seat body for limiting the first and second arc-shaped blocks of the first and second rotating members in an arc-shaped swinging manner; the first torsion unit and the second torsion unit are symmetrical and are adjacent to the first side face of the arc seat body, one end of the symmetrical first torsion unit and one end of the symmetrical second torsion unit are respectively provided with a first supporting rod and a second supporting rod, the first supporting rod and the second supporting rod are respectively communicated with the first long hole and the second long hole, the periphery of the outside of the first supporting rod and the outside of the second supporting rod are respectively provided with a first tooth part and a second tooth part, the first tooth part is meshed with the second tooth part, and the first supporting rod and the second supporting rod are respectively connected with a first shaft and a second shaft of the first side face in a shaft mode; the first pivot and the second pivot respectively pass through the first positioning hole and the second positioning hole at the other end of the first torsion unit and the second torsion unit and the first guide groove and the second guide groove of the first rotating piece and the second rotating piece. When the first rotating part and the second rotating part rotate relatively with the arc-shaped seat body as the axis, the display and the base can be turned relatively, so that the internal structure of the hinge or the pivot joint is prevented from being exposed.

The aforementioned patent I697629 forms rotation friction to the "two-axis rod" by the "first and second torsion units" respectively to generate torsion, and enables the display and the base or two parallel brackets of the dual-touch screen computer to rotate relatively by the relative swing of the "two arc-shaped blocks" of the "two rotating pieces", and to be freely stopped at a certain angle during rotation. As shown in the "split hinge" of TW M602178 in taiwan and the "hidden split hinge" in CN208565248U in the patent publication of the utility model, different split rotating structures are provided, and the display and the base or the two parallel brackets of the dual-touch screen computer are rotated by the relative swinging of the "two arc blocks" of the "two rotating parts".

In practical use, the torque generated by the two sets of torque units to the two shafts is not uniform, and one end of the two sets of torque units needs to be fixed at two ends of the two guide rods respectively to keep balance and stability. Therefore, the display and the base or the two parallel supports of the double-touch screen computer can not rotate relative to each other, the performance in the aspects of smoothness and smoothness is not ideal, and the structure is complicated, so that the whole volume is increased; through the relative swing of the two arc-shaped blocks of the two rotating pieces, although the display and the base or two parallel supports of the double-touch screen computer can rotate mutually, the rotation is unstable due to too large manufacturing tolerance of the two arc-shaped blocks, and the width of the two arc-shaped blocks can not be adjusted elastically according to different sizes of the whole volume, so that the manufacturing and storage costs of elements with different specifications are increased. Therefore, in order to provide a structure different from the prior art and improve the above-mentioned disadvantages, the creation people have years of experience and continuous research and development improvement, which leads to the generation of the present invention.

SUMMERY OF THE UTILITY MODEL

Two sets of an object of the utility model provides a to open hinge structure, can solve two mutual rotation state between the support side by side of current display and base or two touch screen computers, it is not very ideal in the aspect of smooth and easy and the stationarity, can make the structure complicated and increase whole volume, and the monoblock setting of "two arc pieces" and make the unstable problem of making and storage cost with the increase of rotating, and can realize the biax through arc connecting rod cooperation gear train with moving, torsion unit produces torsion and transversely piles up the switching piece in order to reduce the clearance, and then improve the stability and the slimming of structure, effectively save the cost in addition.

To achieve the above-mentioned purpose, the present invention provides a split hinge structure, which comprises a first base, a first adapter, a second adapter, a first arc-shaped connecting rod, a second arc-shaped connecting rod and a gear set. The first base body is provided with a first side surface and a second side surface which are opposite, and a first arc-shaped guide groove and a second arc-shaped guide groove which are arranged in parallel at intervals are arranged between the first side surface and the second side surface; the first connecting piece comprises a first connecting part and a first arc-shaped part, the first connecting part is connected with the first supporting frame, and the first arc-shaped part is limited in the first arc-shaped guide groove in a manner of swinging relative to an arc; the second adaptor comprises a plurality of second adaptor pieces which are stacked transversely, the second adaptor comprises a second connecting part and a second arc-shaped part, the second connecting part is connected with the second supporting frame, and the second arc-shaped part is limited in the second arc-shaped guide groove in a manner of swinging relative to the arc; the first arc-shaped connecting rod is adjacent to the first side surface of the first seat body, and one end of the first arc-shaped connecting rod is pivoted with the first supporting frame through a first pivot; the second arc-shaped connecting rod is symmetrical to the first arc-shaped connecting rod and is adjacent to the first side surface of the first seat body, and one end of the second arc-shaped connecting rod is pivoted with the second supporting frame through a second pivot; the gear set comprises a first gear connecting piece and a second gear connecting piece which are meshed with each other, one end of the first gear connecting piece is pivoted with the first shaft, and the other end of the first gear connecting piece is pivoted with the other end of the first arc-shaped connecting rod through a third pivot; one end of the second gear connecting piece is pivoted with the second shaft, and the other end of the second gear connecting piece is pivoted with the other end of the second arc-shaped connecting rod through a fourth pivot.

When the hinge joint structure is implemented, one side of the first support frame is provided with a first joint seat, the first joint seat comprises a first upper cover and a first base, the upper cover and the lower cover are closed, one side of the first base is provided with a first lug, and the first lug is provided with a positioning hole for positioning the first pivot; and a second adapter is arranged on one side of the second support frame and comprises a second upper cover and a second base, wherein the upper cover and the lower cover are closed, a second lug is arranged on one side of the second base, and the second lug is provided with a positioning hole for positioning a second pivot.

When in use, the utility model discloses still include a second pedestal, the first side interval of second pedestal and first pedestal is side by side, and the second pedestal has first shaft hole and second shaft hole, supplies to connect primary shaft and secondary shaft respectively.

When in use, the utility model discloses still include an apron, the apron has an accommodation space, supplies to hold and connects first pedestal and second pedestal.

In implementation, the plurality of first switching pieces of the first switching piece comprise at least one first thick piece and a plurality of first thin pieces; the plurality of second adapter pieces of the second adapter piece comprise at least one second thick piece and a plurality of second thin pieces.

When the device is implemented, two ends of the first arc-shaped connecting rod are respectively C-shaped and are used for clamping and pivoting the first pivot and the third pivot respectively; the two ends of the second arc-shaped connecting rod are respectively C-shaped and are used for clamping and pivoting the second pivot and the fourth pivot respectively.

When the first gear connecting piece is implemented, the first gear connecting piece comprises a first gear connecting piece and a first gear, the first gear connecting piece is connected with one end of the first gear in a shaft mode, one end of the first gear connecting piece is provided with a first tooth part, and the other end of the first gear connecting piece is connected with the first arc-shaped connecting rod in a shaft mode through a third pivot shaft; the second gear assembly comprises a second gear and a second gear, the second gear is coupled to one end of the second gear through a shaft, one end of the second gear is provided with a second tooth portion, and the other end of the second gear is pivotally connected to the second arc-shaped connecting rod through a fourth pivot.

When in use, the utility model also comprises a second seat body, the second seat body is arranged in parallel with the first side surface of the first seat body at intervals, and the second seat body is provided with a first shaft hole and a second shaft hole for respectively connecting the first shaft and the second shaft; the second seat body is also provided with a limiting groove with one side opened for accommodating and limiting the first gear and the second gear.

When implementing, the utility model discloses still include a torsion positioning unit, torsion positioning unit has torsion unit, and torsion unit's one end has first clamping part, and torsion unit's the other end has the second clamping part, and the first shaft and the second shaft pass the first shaft hole and the second shaft hole of second pedestal respectively to pass first clamping part and second clamping part respectively.

In practice, the torsion unit includes a plurality of torsion pieces stacked transversely, and the first clamping portion and the second clamping portion of any one torsion piece are respectively C-shaped for clamping and positioning the first shaft and the second shaft respectively.

In practice, the torsion positioning unit further comprises at least one concave-convex ring coaxially positioned on the first shaft, a plurality of elastic sheets and a cap.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1: the utility model has the advantages that the three-dimensional appearance of the preferred embodiment is schematically shown when the two supporting frames are arranged at the sides;

FIG. 2: the utility model has a three-dimensional appearance diagram when the preferred embodiment is separated from the cover plate;

FIG. 3: the present invention is an exploded view of the components of the preferred embodiment;

FIG. 4: the preferred embodiment of the present invention is a top view when mounted on the sides of two support frames;

FIG. 5: FIG. 4 is a sectional view taken along line A-A';

FIG. 6: FIG. 4 is a sectional view taken along line B-B';

fig. 7 and 8: the cross-sectional view of the preferred embodiment of the present invention in a half-deployed state;

fig. 9 and 10: the cross-sectional view of the preferred embodiment of the present invention when closed;

fig. 11 is a schematic perspective view of the preferred embodiment of the present invention when closed.

Description of the reference numerals

Split hinge structure 1

First seat body 2

First arc-shaped bump 21

Second arc-shaped bump 22

First side 23

Second side 24

First arc-shaped guide groove 25

Second arcuate guide groove 26

Second seat body 3

Cover plate 31

Accommodating space 311

Limiting groove 32

First shaft hole 33

Second shaft hole 34

First adapter 4

First switching piece 41

First thick plate 411

First sheet 412

First connection portion 42

First arc-shaped part 43

Second adapter piece 5

Second interposer 51

Second thick plate 511

Second sheet 512

Second connecting portion 52

Second arc-shaped part 53

First arc-shaped connecting rod 6

Third pivot 61

Second arc-shaped connecting rod 7

Fourth pivot 71

Gear unit 8

First gear 81

First gear 811

First gear 812

First tooth 813

First shaft 814

Second gear 82

Second gearing element 821

Second gear 822

Second tooth 823

Second shaft 824

Torsion positioning unit 9

First support frame 91

First adapter 911

First upper cover 912

First base 913

First lug 914

First pivot 915

Second support frame 92

Second adaptor 921

Second upper cover 922

Second base 923

Second lug 924

Second pivot 925

Torsion unit 93

Torsion piece 931

First clamping part 932

Second clamping part 933

Concave-convex ring 94, 94'

Elastic sheet 95

Cap 96

Positioning plate 97

An annular locating tab 98.

Detailed Description

The technical solution in the embodiment of the present invention is clearly and completely described below with reference to the drawings in the embodiment of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be implemented in other ways different from the specific details set forth herein, and one skilled in the art may similarly generalize the present invention without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Referring to fig. 1 to 6, a split hinge structure 1 according to a preferred embodiment of the present invention mainly includes a first base 2, a second base 3, a first adapter 4, a second adapter 5, a first arc-shaped connecting rod 6, a second arc-shaped connecting rod 7, a gear set 8 and a torsion positioning unit 9. The display of the electronic device is connected to a first supporting frame 91, a first adapter 911 is disposed on a side of the first supporting frame 91, the first adapter 911 includes a first upper cover 912 and a first base 913 that are covered up and down, a first protrusion 914 is disposed on a side of the first base 913, the first protrusion 914 has a positioning hole for positioning a first pivot 915; the base of the electronic device is connected to a second supporting frame 92, a second adaptor 921 is disposed on a side of the second supporting frame 92, the second adaptor 921 includes a second upper cover 922 and a second base 923, the second upper cover and the second base 922 are covered on the upper and lower sides of the second base 923, a second lug 924 is disposed on one side of the second base 923, and the second lug 924 has a positioning hole for positioning a second pivot 925. A first connecting portion 42 of the first adapter 4 is connected between the first upper cover 912 and the first base 913 in a clamping manner, and a second connecting portion 52 of the second adapter 5 is connected between the second upper cover 922 and the second base 923 in a clamping manner, so that when the first adapter 4 and the second adapter 5 rotate relative to each other with the first base 2 as an axis, the display and the base are turned over relative to each other, and in the implementation, the first connecting portion 42 of the first adapter 4 and the second connecting portion 52 of the second adapter 5 can also be connected to two parallel side edges of the support frame of the dual touch screen computer.

The first base body 2 is provided with a first side surface 23 and a second side surface 24 which are opposite, and one side of the first side surface 23 is provided with the second base body 3 at intervals; the bottom of the first base 2 and the bottom of the second base 3 are arc-shaped surfaces respectively, so as to be accommodated and locked in an accommodating space 311 above a cover plate 31 respectively. The top of the first base 2 is a rectangular plane, the top surface of the first base 2 has a set of first arc-shaped protrusions 21 and a set of second arc-shaped protrusions 22 to form two spaced arc-shaped grooves respectively arranged between the first side surface 23 and the second side surface 24, and the top surface of the first base 2 has arc-shaped grooves with cross sections respectively in the shape of an arc segment, and the two arc-shaped grooves are respectively used as a first arc-shaped guide groove 25 and a second arc-shaped guide groove 26. The second base 3 has a limiting groove 32 with one side opened, and the side plate of one side of the limiting groove 32 has a first shaft hole 33 and a second shaft hole 34 which are horizontally spaced and arranged in parallel and respectively penetrate through the surface of the side plate for pivotally connecting and positioning a first shaft 814 and a second shaft 824.

The first connecting member 4 is formed by transversely stacking a plurality of first connecting pieces 41, the plurality of first connecting pieces 41 include two groups of first thick plates 411 and a plurality of first thin plates 412, and the plurality of first thin plates 412 are sandwiched between the two groups of first thick plates 411. The combined first adapter 4 comprises a first connecting portion 42 and a first arc-shaped portion 43 extending from one end of the first connecting portion 42 to the outside, and the first connecting portion 42 sandwiches and connects with the first adapter 911 of the first support frame 91; the first arc-shaped portion 43 is an arc-shaped plate with a cross section in a shape of a trapezoid, the first arc-shaped portion 43 is inserted into the first arc-shaped guide slot 25, and the two first arc-shaped protrusions 21 are used for limiting the two sets of first thick pieces 411 respectively, so that the first arc-shaped portion 43 can swing in an arc shape in the first arc-shaped guide slot 25.

The second adaptor 5 and the first adaptor 4 are correspondingly disposed on two opposite side edges of the first base 2, the second adaptor 5 is formed by stacking a plurality of second adaptor sheets 51 transversely, the plurality of second adaptor sheets 51 includes two sets of second thick sheets 511 and a plurality of second thin sheets 512, and the plurality of second thin sheets 512 are sandwiched between the two sets of second thick sheets 511. The assembled second adaptor 5 includes a second connecting portion 52 and a second arc portion 53 extending from one end of the second connecting portion 52 to be away from the outside, and the second connecting portion 52 sandwiches and connects with the second adaptor 921 of the second support frame 92; the second arc portion 53 is an arc plate with a cross section in a shape of a minor arch, the second arc portion 53 is inserted into the second arc guide slot 26, and the two second arc bumps 22 respectively limit the two sets of second thick pieces 511, so that the second arc portion 53 can swing in an arc shape in the second arc guide slot 26.

The first arc-shaped connecting rod 6 and the second arc-shaped connecting rod 7 are arc-shaped rods respectively, and the first arc-shaped connecting rod 6 and the second arc-shaped connecting rod 7 are symmetrical to each other and are respectively adjacent to the first side surface 23 of the first seat body 2. The two ends of the first arc-shaped link 6 are respectively C-shaped for respectively clamping the first pivot 915 and the third pivot 61 pivotally connected to the first adapter 911. The two ends of the second arc-shaped connecting rod 7 are respectively C-shaped for respectively clamping a second pivot 925 and a fourth pivot 71 pivotally connected to the second adapter 921. The second support frame 92 can stably rotate relative to the first support frame 91 by clamping the first pivot 915 and the third pivot 61 at two ends of the first arc-shaped connecting rod 6 respectively, and clamping the second pivot 925 and the fourth pivot 71 at two ends of the second arc-shaped connecting rod 7 respectively.

The gear set 8 includes a first gear 81 and a second gear 82, the first gear 81 includes a first gear 811 and a first gear 812, one end of the first gear 811 has a first tooth 813 with multiple teeth, and the end of the first gear 811 is coupled to one end of the first gear 812 by a first shaft 814, and the other end of the first gear 811 is pivotally connected to one end of the first arc-shaped link 6 by a third shaft 61; the second gear 82 includes a second gear 821 and a second gear 822, one end of the second gear 821 has a second tooth 823 with multiple teeth for engaging with the first tooth 813 of the first gear 811, the end of the second gear 821 is coupled to one end of the second gear 822 by a second shaft 824, the second gear 822 is engaged with the first gear 812, the first gear 812 and the second gear 822 are received and limited in the limit groove 32 of the second housing 3, and the other end of the second gear 821 is pivotally connected to one end of the second arc-shaped link 7 by a fourth pivot 71.

The twist positioning unit 9 includes a torsion unit 93, two concave-convex rings (94, 94'), a plurality of elastic sheets 95 and a cap 96, wherein the torsion unit 93 includes a plurality of torsion sheets 931 stacked transversely, one end of the torsion unit 93 has a C-shaped first clamping portion 932, and the other end of the torsion unit 93 has a C-shaped second clamping portion 933. The first shaft 814 and the second shaft 824 respectively pass through the first shaft hole 33 and the second shaft hole 34 of the second base 3, and then respectively pass through the first clamping portion 932 and the second clamping portion 933, so as to achieve a predetermined torsion value, and the second support frame 92 can freely stop or be positioned at a predetermined angle when rotating relative to the first support frame 91. After the two concave-convex rings (94,94 ') and the elastic pieces 95 are coaxially sleeved on the first shaft 814, the cap 96 is locked and fixed at one end of the first shaft 814, so that the concave-convex parts of the two concave-convex rings (94, 94') respectively press against the positioning plate 97 and the corresponding concave-convex parts of the annular positioning piece 98, and the elements are stably connected.

Therefore, as shown in fig. 7 to 11, in the process that the display is turned over to be closed or completely unfolded at an angle of about 180 degrees relative to the base or the two parallel supporting frames of the dual-touch screen computer, the first gear 811 and the second gear 821 can be rotated reversely by the linkage of the gears of the gear set 8, and simultaneously the first gear 812 and the second gear 822 rotate reversely and synchronously drive the C-shaped end of the first arc-shaped connecting rod 6 and the third pivot 61, and the C-shaped end of the second arc-shaped connecting rod 7 and the fourth pivot 71 to synchronously rotate, so that the C-shaped other end of the first arc-shaped connecting rod 6 drives the first pivot 915 and the first adapter 911 of the first supporting frame 91, the C-shaped other end of the second arc-shaped connecting rod 7 drives the second pivot 925 and the second adapter 921 of the second supporting frame 92, and then one end of the first shaft 814 and one end of the second shaft 824 are respectively connected with the first clamping part 932, the second clamping part, and the second clamping part of the torsion unit 93, The synchronous rotation friction between the second clamping portions 933 generates torsion, so that the torsion can be stably maintained within a preset range at each rotation angle, and the display and the base or two parallel support frames of the dual-touch screen computer can relatively stably rotate and can freely stop at a certain angle during rotation. By locking the cap 96 to one end of the first shaft 814, the force of the two concave-convex rings (94, 94') against the corresponding concave-convex portions of the positioning plate 97 and the annular positioning plate 98 can be adjusted, thereby achieving the torque effect. In addition, the first shaft 814 and the second shaft 824 rotate relatively during the reverse rotation of the first gear 811, the second gear 821, the first gear 812 and the second gear 822, and the amount of the torsion can be further adjusted by adjusting the number of the plurality of elastic pieces 95, so as to adjust and output different torsion.

To sum up, the utility model discloses not only can close piece, second tooth and close the piece and first gear, the counter-rotation in-process of second gear at first tooth, through primary shaft and secondary shaft respectively with two C of torsion unit press from both sides the synchronous rotational friction between the portion in order to produce torsion, make two epaxial unsmooth rings support the concave-convex part that presses locating plate and annular location piece respectively in order to realize the torsion effect, even when adjusting the quantity of a plurality of flexure strips respectively, further adjust the output of different torsion. In addition, in the linkage process of the two arc-shaped connecting rods, the first pivot and the third pivot are respectively clamped by the two C-shaped ends of the first arc-shaped connecting rod, and the second pivot and the fourth pivot are respectively clamped by the two C-shaped ends of the second arc-shaped connecting rod, so that the display can disperse the generated rotating torque to the four pivots in the overturning process relative to the base or two parallel supports of the double-touch screen computer, and the rotation is more stable. In addition, through the transverse stacking structure of the two adapter pieces, the number of the plurality of sheets can be respectively adjusted according to needs, so that the gap is reduced, the stability of the structure is improved, the requirements of different specifications and thinning can be flexibly met, and the processing and storage cost can be effectively saved.

The foregoing description is only of the preferred embodiments of the present invention, and it should be understood that the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Claims

1. Split hinge structure, characterized in that it comprises:

the first base is provided with a first side surface and a second side surface which are opposite, and a first arc-shaped guide groove and a second arc-shaped guide groove which are arranged in parallel at intervals are arranged between the first side surface and the second side surface;

the first connecting piece comprises a first connecting part and a first arc-shaped part, the first connecting part is connected with a first supporting frame, and the first arc-shaped part is limited in the first arc-shaped guide groove in a manner of swinging relative to an arc;

the second adaptor comprises a plurality of second adaptor pieces which are transversely stacked, the second adaptor pieces comprise second connecting parts and second arc-shaped parts, the second connecting parts are connected with a second supporting frame, and the second arc-shaped parts are limited in the second arc-shaped guide grooves in a mode of swinging relative to the arc;

a first arc connecting rod, which is adjacent to the first side surface of the first seat body, and one end of the first arc connecting rod is pivoted with the first supporting frame through a first pivot;

a second arc connecting rod, which is symmetrical with the first arc connecting rod and is adjacent to the first side surface of the first seat body, and one end of the second arc connecting rod is pivoted with the second supporting frame through a second pivot; and

the gear set comprises a first gear connecting piece and a second gear connecting piece which are meshed with each other, one end of the first gear connecting piece is pivoted with a first shaft, and the other end of the first gear connecting piece is pivoted with the other end of the first arc-shaped connecting rod through a third pivot; one end of the second gear connecting piece is pivoted with a second shaft, and the other end of the second gear connecting piece is pivoted with the other end of the second arc-shaped connecting rod through a fourth pivot.

2. The split hinge structure as claimed in claim 1, wherein one side of the first supporting frame has a first adapter seat, the first adapter seat comprises a first upper cover and a first base, the first upper cover and the first base cover are covered together, one side of the first base has a first protrusion, the first protrusion has a positioning hole for positioning a first pivot; one side of the second support frame is provided with a second adapter which comprises a second upper cover and a second base, wherein the upper cover and the lower cover are closed, one side of the second base is provided with a second lug, and the second lug is provided with a positioning hole for positioning a second pivot.

3. The split hinge structure as claimed in claim 1, further comprising a second base, the second base being spaced apart from and juxtaposed to the first side of the first base, the second base having a first axial hole and a second axial hole for connecting the first shaft and the second shaft, respectively.

4. The split hinge structure as claimed in claim 3, further comprising a cover plate having a receiving space for receiving and connecting the first housing and the second housing.

5. The split hinge structure of claim 1, wherein the first plurality of tabs of the first hinge member comprises at least a first thick sheet and a first plurality of thin sheets; the plurality of second adapter pieces of the second adapter piece comprise at least one second thick piece and a plurality of second thin pieces.

6. The split hinge structure of claim 5, wherein the at least one first thick sheet is divided into two groups, and the plurality of first thin sheets are sandwiched between the two groups of first thick sheets; the at least one second thick sheet is divided into two groups, and the plurality of second thin sheets are clamped between the two groups of second thick sheets.

7. The split hinge structure as claimed in claim 1, wherein both ends of the first curved connecting rod are respectively C-shaped for clamping and pivoting the first pivot and the third pivot; the two ends of the second arc-shaped connecting rod are respectively C-shaped and are used for clamping and pivoting the second pivot and the fourth pivot respectively.

8. The split hinge structure as claimed in claim 1, wherein the first engaging member comprises a first engaging member and a first gear, the first engaging member is coupled to one end of the first gear, one end of the first engaging member has a first tooth portion, and the other end of the first engaging member is pivotally connected to the first arc-shaped link via the third pivot; the second gear assembly includes a second gear and a second gear, the second gear is coupled to one end of the second gear, one end of the second gear has a second tooth portion, and the other end of the second gear is pivotally connected to the second arc-shaped link through the fourth pivot.

9. The split hinge structure as claimed in claim 8, further comprising a second base, the second base being spaced apart from and juxtaposed to the first side of the first base, the second base having a first axial hole and a second axial hole for connecting the first shaft and the second shaft, respectively; the second base body is also provided with a limiting groove with one open side for accommodating and limiting the first gear and the second gear.

10. The split hinge structure as claimed in claim 3, further comprising a torsion positioning unit having a torsion unit with a first clamping portion at one end and a second clamping portion at the other end, wherein the first shaft and the second shaft respectively pass through the first shaft hole and the second shaft hole of the second housing and respectively pass through the first clamping portion and the second clamping portion.

11. The split hinge structure as claimed in claim 10, wherein the torsion unit comprises a plurality of torsion pieces stacked transversely, and the first and second holding portions of each torsion piece are respectively C-shaped for holding and positioning the first and second shafts respectively.

12. The split hinge structure of claim 10 or 11, wherein the torsion positioning unit further comprises at least one male-female ring coaxially positioned on the first shaft, a plurality of elastic pieces and a cap.