CN213064312U - Split hinge structure - Google Patents

Abstract

The utility model relates to a split hinge structure, wherein a first arc-shaped groove and a second arc-shaped groove are arranged on a seat body, and the first arc-shaped part and the second arc-shaped part of a first rotating part and a second rotating part are respectively limited; the first friction torsion part and the second friction torsion part at one end of the first torsion bar and the second torsion bar are respectively sleeved with the first supporting rod and the second supporting rod to respectively generate rotation friction torsion, at least one first guide part and at least one second guide part of the first supporting rod and the second supporting rod are respectively and correspondingly connected with the first rotating part and at least one first guide rod and at least one second guide rod of the second rotating part in a relative sliding mode, a gear set comprises a first gear, a middle gear and a second gear which are sequentially and adjacently meshed, the first gear and the second gear are respectively in shaft connection with the first shaft and the second shaft, one end of the first shaft and one end of the second shaft are respectively connected with the other end of the first torsion bar and the other end of the second torsion bar, and the other ends of the first shaft and the second shaft are respectively connected with the seat body.

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 pivot joint from being exposed.

For example, taiwan bulletin No. I697629 discloses a "hidden split hinge", No. M540459 discloses a "biaxial simultaneous movement hinge", and No. I693011 discloses a "bendable support frame", which respectively provides a solution. As shown in the patent document of "hidden split hinge" of publication No. I697629, an arc seat body is provided with first and second arc-shaped slots for respectively limiting first and second arc-shaped blocks of first and second rotating members in a manner of swinging in relation to an arc; 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 outer peripheries of the first supporting rod and 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 in shaft connection with a first shaft and a second shaft of the first side face; 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 limiting groove and the second limiting groove of the first rotating part and the second rotating part. When the first rotating part and the second rotating part rotate relatively with the arc base body as the axis, the display and the base can be turned over relatively.

The aforementioned patent I697629 is mainly to generate torque by "two sets of torque units" respectively forming rotation friction to "two shafts", so that the display and the base or two parallel supports of the dual-touch screen computer can rotate relatively and can be freely stopped at a certain angle during rotation. However, 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 smooth and stable performance is not ideal, and the structure is complex, so that the overall size is increased.

SUMMERY OF THE UTILITY MODEL

In view of the above, in order to provide a structure different from the prior art and improve the above disadvantages, the inventor has experienced many years and has continuously researched and developed the invention.

An object of the utility model is to provide 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, and can let the structure complicated and increase the problem of whole volume, and can be through with original torsion dispersion to "two torsion bars" and "biax pole" on, make the output of torsion more stable even, and can effectually reduce whole thickness in order to do benefit to the design, reach whole small, thin market demand.

To achieve the above objective, the present invention provides an open hinge structure, which mainly comprises a base, a first rotating member, a second rotating member, a first torsion bar, a second torsion bar and a gear set. The base body is provided with a first side surface and a second side surface which are opposite, and a first arc-shaped groove and a second arc-shaped groove which are arranged in parallel at intervals are arranged between the first side surface and the second side surface; the first rotating part comprises a first connecting part and a first arc-shaped part, the first connecting part is connected with the first support frame, one side of the first connecting part is provided with at least one first guide rod, and the first arc-shaped part is limited in the first arc-shaped groove in a manner of swinging relative to the arc; the second rotating part comprises a second connecting part and a second arc-shaped part, the second connecting part is connected with a second supporting frame, one side of the second connecting part is provided with at least one second guide rod, and the second arc-shaped part is limited in the second arc-shaped groove in a manner of swinging relative to the arc; the first torsion bar is adjacent to one side of the first connecting part, one end of the first torsion bar is provided with a first friction torsion part, the first friction torsion part is sleeved with a first supporting rod for generating rotation friction torsion, the first supporting rod is provided with at least one first guide part, and the at least one first guide part is correspondingly connected with at least one first guide rod in a relatively sliding manner; the second torsion bar is symmetrical to the first torsion bar and is adjacent to one side of the second connecting part, one end of the second torsion bar is provided with a second friction torsion part which is sleeved with a second supporting rod for generating rotation friction torsion, the second supporting rod is provided with at least one second guiding part, and the at least one second guiding part is correspondingly connected with at least one second guide rod in a relatively sliding manner; the gear set comprises a first gear, an intermediate gear and a second gear which are sequentially and adjacently meshed, the first gear is connected with a first shaft in a shaft coupling mode, one end of the first shaft is connected with the other end of the first torsion rod, and the other end of the first shaft is connected and positioned on the seat body; the second gear is connected with a second shaft, one end of the second shaft is connected with the other end of the second torsion bar, and the other end of the second shaft is connected and positioned on the seat body.

When in implementation, the base body comprises a first base and a second base, and the first base is provided with a first side surface and a first arc-shaped groove and a second arc-shaped groove which are arranged in parallel at intervals; the second base is provided with a second side surface, and the second side surface is provided with a first shaft hole and a second shaft hole which are used for respectively connecting and positioning the first shaft and the second shaft.

When the guide device is implemented, one side of the first connecting part is provided with two first lugs which are parallel to each other, a first limiting groove is arranged between the two first lugs, the at least one first guide rod penetrates through the first limiting groove, and two ends of the at least one first guide rod are respectively connected with the two first lugs.

When the connecting structure is implemented, one side of the second connecting part is provided with two second lugs which are parallel to each other, a second limiting groove is arranged between the two second lugs, at least one second guide rod penetrates through the second limiting groove, and two ends of the at least one second guide rod are respectively connected with the two second lugs.

When the guide device is implemented, the first guide part is a through hole which radially penetrates through the first support rod and is used for the first guide rod to penetrate through in a relatively sliding manner; the second guide part is a through hole which radially penetrates through the second support rod and is used for the second guide rod to penetrate through in a relatively sliding mode.

When the seat is implemented, the top of the seat body is also provided with a group of first lugs with opposite end surfaces, a first interval is arranged between the first lugs, and a first arc-shaped groove is formed between the first lugs and a first arc-shaped surface of the seat body; the first arc part comprises a first arc plate and a first arc convex part, the first arc plate is limited in the first arc groove in a mode of swinging relative to the arc, and the first arc convex part is limited in the first interval.

When the seat is implemented, the top of the seat body is also provided with a group of second convex blocks with opposite end surfaces, a second interval is arranged between the group of second convex blocks, and a second arc-shaped groove is formed between the group of second convex blocks and a second arc-shaped surface of the seat body; the second arc part comprises a second arc plate and a second arc convex part, the second arc plate is limited in the second arc groove in a mode of swinging relative to the arc, and the second arc convex part is limited in the second interval.

When the seat is implemented, the two sides of the top of the seat body are also provided with a first limiting part and a second limiting part, one side of the first connecting part is provided with a first abutting part which abuts downwards to position the first limiting part, one side of the second connecting part is provided with a second abutting part which abuts downwards to position the second limiting part.

When the device is implemented, the first shaft and the second shaft respectively penetrate through the base body and then are respectively connected with a first torsion positioning piece and a second torsion positioning piece; the first torsion positioning piece comprises a plurality of first elastic sheets and a first cap, and the second torsion positioning piece comprises a plurality of second elastic sheets and a second cap for respectively fixing the first shaft and the second shaft in a sleeved mode.

When the torsion positioning device is implemented, the first torsion positioning piece further comprises at least one first concave-convex ring, and the second torsion positioning piece further comprises at least one second concave-convex ring for respectively sleeving the first shaft and the second shaft.

In order to facilitate a deeper understanding of the present invention, it will be described in detail later.

Drawings

Fig. 1 is a schematic perspective view of a preferred embodiment of the present invention mounted on the sides of two supporting frames;

FIG. 2 is an exploded view of the preferred embodiment of the present invention;

FIG. 3 is a top view of the preferred embodiment of the present invention mounted on the sides of two support frames;

FIG. 4 is a cross-sectional view taken along line A-A' of FIG. 3;

FIG. 5 is a cross-sectional view taken along line B-B' of FIG. 3;

FIG. 6 is a cross-sectional view taken along line C-C' of FIG. 3;

FIG. 7 is a schematic cross-sectional view of a preferred embodiment of the present invention in a semi-deployed state;

FIG. 8 is a schematic cross-sectional view of a preferred embodiment of the present invention in a semi-deployed state;

fig. 9 is a cross-sectional view of the preferred embodiment of the present invention when closed;

fig. 10 is a 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 and base 2

First side 211 of the first base 21

The first position-limiting portion 212 and the second position-limiting portion 213

First arcuate surface 214 first arcuate slot 215

Second arcuate surface 216 and second arcuate slot 217

First bump 23 first space 231

Second bump 24 second spacing 241

Straight part 221 of second base 22

Positioning groove 223 of transverse part 222

Second side 224 first axial aperture 225

Second shaft hole 226 first rotating member 3

First connecting portion 31 first lug 311,311'

First limiting groove 312 and first guide rod 313

First pressing part 314 first arc part 32

First arc plate 321 first arc convex part 322

Second rotating member 4 second connecting portion 41

Second lugs 411, 411' and second limiting groove 412

Second guide rod 413 and second pressing part 414

Second arc part 42 second arc plate 421

Second arc projection 422 first torque rod 5

First positioning hole 51 first friction torsion part 52

First guide part 531 of first lever 53

Second positioning hole 61 of second torsion bar 6

Second friction torsion part 62 and second strut 63

Second guide 631 gear set 7

First gear 71 intermediate gear 72

Second gear 73 first torsional detent 8

First male-female ring 81 first elastic piece 82

First cap 83 first concave-convex portion 84

Second torsion retainer 80 second male and female ring 801

Second elastic piece 802 and second cap 803

Second concave-convex part 804 first support frame 91

Second support 92 first shaft 93

A second shaft 94.

Detailed Description

Referring to fig. 1 to 6, a preferred embodiment of the split hinge structure 1 of the present invention mainly includes a base 2, a first rotating member 3, a second rotating member 4, a first torsion bar 5, a second torsion bar 6, a gear set 7, a first torsion positioning member 8 and a second torsion positioning member 80. The first connecting portion 31 of the first rotating member 3 is connected to a side of a first supporting frame 91 of a display of an electronic device, and the second connecting portion 41 of the second rotating member 4 is connected to a side of a second supporting frame 92 of a base of the electronic device, so that when the first rotating member 3 and the second rotating member 4 rotate relatively around the base body 2 as an axis, the display and the base are turned over relatively, and in implementation, the first connecting portion 31 of the first rotating member 3 and the second connecting portion 41 of the second rotating member 4 can also be connected to sides of two parallel first supporting frames 91 and second supporting frames 92 of the dual-touch screen electronic device.

The bottom of the seat body 2 is an arc-shaped surface, the top of the seat body 2 is a rectangular plane, and the seat body 2 comprises a first base 21 and a second base 22. Wherein, one end of the first base 21 forms a first side surface 211; two sides of the top of the first base 21 are respectively formed with a step downward, and the two steps are respectively used as the first position-limiting portion 212 and the second position-limiting portion 213. The top of the first base 21 further has a set of first protrusions 23 with opposite end surfaces and a set of second protrusions 24 with opposite end surfaces, a first space 231 is formed between the two first protrusions 23, a first arc-shaped groove 215 is formed between the two first protrusions 23 and a first arc-shaped surface 214 of the first base 21, and the first arc-shaped groove 215 is an arc-shaped groove with an inferior arch-shaped cross section. A second gap 241 is provided between the two second protrusions 24, a second arc-shaped groove 217 is formed between the two second protrusions 24 and a second arc-shaped surface 216 of the first base 21, the second arc-shaped groove 217 is an arc-shaped groove with a cross section of a minor arc shape, and the second arc-shaped groove 217 is arranged in parallel with the first arc-shaped groove 215 at a gap.

The second base 22 is roughly in a T shape of lying, and comprises a straight part 221 and a transverse part 222, one end of the straight part 221 is overlapped to connect the other end of the first base 21, and the straight part 221 is provided with a positioning groove 223 which transversely penetrates; one end of the transverse portion 222 forms a second side surface 224, the second side surface 224 and the first side surface 211 are opposite to two ends of the base body 2, and two ends of the transverse portion 222 respectively have a first shaft hole 225 and a second shaft hole 226 which are spaced and parallel and penetrate through the second side surface 224.

The first rotating member 3 includes a first connecting portion 31 having a flat plate shape and a first arc-shaped portion 32 extending from one end of the first connecting portion 31 to be away from the first arc-shaped portion, a plate surface of the first connecting portion 31 has a through hole for being locked to the first supporting frame 91, one side of the first connecting portion 31 has two first protruding lugs 311,311 'parallel to each other, and a slot is formed between the two first protruding lugs 311,311' and serves as a first limiting slot 312. After the two headed screws respectively pass through the first limiting grooves 312, one ends of the headed screws are respectively screwed on the first lugs 311, so that the two ends of the two headed screws are respectively connected with the two first lugs 311,311', and in practice, the headed screws serve as first guide rods 313. The first connecting portion 31 is provided with a first pressing portion 314 at a side perpendicular to the extending direction of the two first lugs 311,311', and the first pressing portion 314 and the first limiting portion 212 have opposite steps, so that when the first pressing portion 314 presses downward and is positioned above the first limiting portion 212, the first supporting frame 91 and the second supporting frame 92 are completely unfolded into a plane shape without being turned over backward excessively.

The first arc portion 32 includes a first arc plate 321 and a first arc protrusion 322, wherein the first arc plate 321 is an arc plate with a cross section presenting a shape of an inferior segment, and the first arc plate 321 is inserted into and limited in the first arc groove 215; the first arc-shaped protrusion 322 is formed by inward protrusion of the middle portion of the inner arc surface of the first arc-shaped plate 321, and when the first arc-shaped plate 321 is limited in the first arc-shaped groove 215 in a relatively arc-shaped swinging manner, the first arc-shaped protrusion 322 is limited in the first interval 231.

The second rotating member 4 and the first rotating member 3 are correspondingly disposed on two opposite side edges of the base 2, the second rotating member 4 includes a plate-shaped second connecting portion 41 and a second arc-shaped portion 42 extending from one end of the second connecting portion 41 to be away from the outside, a plate surface of the second connecting portion 41 has a through hole for being connected to the second supporting frame 92 in a locking manner, one side of the second connecting portion 41 has two second lugs 411,411 'parallel to each other, and a slot is formed between the two second lugs 411, 411', and the slot serves as a second limiting slot 412. After the two headed screws respectively pass through the second limiting grooves 412, one ends of the headed screws are respectively screwed on the second lugs 411, so that the two ends of the two headed screws are respectively connected with the two second lugs 411, 411', and in practice, the headed screws are used as second guide rods 413. A second pressing portion 414 is disposed on one side of the second connecting portion 41 perpendicular to the extending direction of the two second lugs 411, 411', the second pressing portion 414 and the second limiting portion 213 have steps with opposite shapes, so that when the second pressing portion 414 presses downward and is positioned above the second limiting portion 413, the first supporting frame 91 and the second supporting frame 92 are completely unfolded into a plane shape without being turned over backward excessively.

The second arc portion 42 includes a second arc plate 421 and a second arc convex portion 422, wherein the second arc plate 421 is an arc plate with a cross section presenting a shape of inferior segment, and the second arc plate 421 is inserted into and limited in the second arc groove 217; the second arc-shaped protrusion 422 is formed by inward protrusion of the middle section of the inner arc surface of the second arc-shaped plate 421, and when the second arc-shaped plate 421 is limited in the second arc-shaped groove 217 in a manner of swinging in an arc shape, the second arc-shaped protrusion 422 is limited in the second space 241.

The first and second torsion bars 5 and 6 are elongated bars, respectively, and the first and second torsion bars 5 and 6 are symmetrical to each other and adjacent to one sides of the first and second connection portions 31 and 41, respectively. The first torsion bar 5 has a first positioning hole 51 and a C-shaped clamping portion at two ends thereof, wherein one end of a first shaft 93 passes through the first positioning hole 51 to connect with one end of the first torsion bar 5, and the C-shaped clamping portion is sleeved with a first support bar 53 to generate a rotational friction torsion, and the C-shaped clamping portion is used as a first friction torsion portion 52. The first support rod 53 has two through holes penetrating radially, and the through holes are used as a first guide part 531; after the two first guide bars 313 respectively pass through the two first guide portions 531 in a relatively slidable manner, the first support rod 53 can smoothly and stably slide back and forth on the two first guide bars 313 while rotating synchronously with the first shaft 93 at one end of the first torsion bar 5.

The second torsion bar 6 has a second positioning hole 61 and a C-shaped clamping portion at two ends thereof, wherein one end of a second shaft 94 passes through the second positioning hole 61 to connect with one end of the second torsion bar 6, and the C-shaped clamping portion is sleeved with a second support rod 63 to generate rotational friction torsion, and the C-shaped clamping portion is used as the second friction torsion portion 62. In addition, the second support rod 63 has two through holes passing through in the radial direction, and the through holes are used as the second guiding portion 631; after the two second guide rods 413 respectively pass through the two second guide portions 631 in a relatively slidable manner, the second strut 63 can smoothly and stably slide back and forth on the two second guide rods 413 when the one end of the second torsion bar 6 rotates synchronously with the second shaft 94.

The gear set 7 includes a first gear 71, an intermediate gear 72 and a second gear 73 which are sequentially and adjacently engaged, wherein the first gear 71 is coupled to a first shaft 93, and the other end of the first shaft 93 passes through a first shaft hole 225 of the second base 22 to be connected and positioned on the base body 2; the intermediate gear 72 is pivotally positioned in the positioning groove 223; the second gear 73 is coupled to the second shaft 94, and the other end of the second shaft 94 passes through the second shaft hole 226 of the second base 22 to be connected and positioned on the seat body 2. The first shaft 93 and the second shaft 94 are respectively connected to the first torsion positioning member 8 and the second torsion positioning member 80 after passing through the first shaft hole 225 and the second shaft hole 226, respectively.

The first torsion positioning element 8 comprises a plurality of first concave-convex rings 81, a plurality of first elastic sheets 82 and a first cap 83 which are axially arranged in sequence; the second torsion positioning element 80 includes a plurality of second concave-convex rings 801, a plurality of second elastic sheets 802 and a second cap 803, so that after the first shaft 93 and the second shaft 94 are respectively sleeved and connected, the other end of the first shaft 93 and the other end of the second shaft 94 are respectively fixed by the first cap 83 and the second cap 803 in a locking manner; and the first concave-convex ring 81 and the second concave-convex ring 801 are respectively pressed against the first concave-convex portion 84 and the second concave-convex portion 804 of the corresponding surfaces.

Therefore, as shown in fig. 2, 7-11, 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 brackets of the dual-touch screen electronic device, the first gear 71 and the second gear 73 can rotate in opposite directions by the linkage of the gears of the gear set 7, and the one end of the first torsion bar 5, the first shaft 93, the one end of the second torsion bar 6, and the second shaft 94 are synchronously driven to be synchronously linked; the first support rod 53 and the second support rod 63 respectively move in the first limiting groove 312 and the second limiting groove 412; the first friction torsion portion 52 of the first torsion bar 5 and the second friction torsion portion 62 of the second torsion bar 6 respectively generate torsion with the first support bar 53 and the second support bar 63, 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 supports of the dual-touch screen electronic device can stably rotate relatively and can freely stop at a certain angle during rotation. Meanwhile, by increasing or decreasing the number of the first elastic pieces 82 and the second elastic pieces 802, and by locking the first cap 83 and the second cap 803 to the other end of the second shaft 93 and the other end of the second shaft 94, the force of the first concave-convex ring 81 and the second concave-convex ring 801 against the first concave-convex portion 84 and the second concave-convex portion 804, respectively, can be adjusted, thereby achieving another torque effect.

To sum up, the utility model discloses not only can be at the rotatory in-process of first gear and second gear, through two branches respectively with two friction torsion portions of two torsion bars between synchronous rotation friction in order to produce torsion, and can be at the rotatory in-process of first gear and second gear, make first unsmooth ring and the unsmooth ring of second support respectively and press first concave-convex part and second concave-convex part in order to realize dual torsion effect, even when adjusting the quantity of first flexure strip and second flexure strip respectively, further adjust the output of different torsions. The display device can disperse the generated rotating torque force in the overturning process relative to the base or two parallel supports of the double-touch screen electronic device, so that the output of the torque force is more stable and uniform, and the rotating positioning is realized. And because two branch links are connected on a set of guide arm that is parallel to each other with the mode that can slide relatively respectively, can also make two branch can more stable make a round trip to slide to increase the smooth and easy sense when using, and the life of extension component. Meanwhile, through the structural design, the whole thickness can be effectively reduced so as to be beneficial to design, and the market demand of light and thin whole volume is met.

Although the present invention has been described with reference to specific preferred embodiments for achieving the above objects, it should be understood by those skilled in the art that various changes and modifications can be made without departing from the spirit of the present invention, and all such changes and modifications are intended to be covered by the present invention.

Claims (10)

1. A split hinge structure, comprising:

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

the first rotating part comprises a first connecting part and a first arc-shaped part, the first connecting part is connected with a first support frame, one side of the first connecting part is provided with at least one first guide rod, and the first arc-shaped part is limited in the first arc-shaped groove in a manner of swinging relative to the arc;

the second rotating part comprises a second connecting part and a second arc-shaped part, the second connecting part is connected with a second supporting frame, one side of the second connecting part is provided with at least one second guide rod, and the second arc-shaped part is limited in the second arc-shaped groove in a mode of swinging relative to the arc;

a first torsion bar, which is adjacent to one side of the first connecting part, one end of the first torsion bar is provided with a first friction torsion part, the first friction torsion part is sleeved with a first support bar to generate rotation friction torsion, the first support bar is provided with at least one first guide part, and the at least one first guide part is correspondingly connected with the at least one first guide rod in a relatively sliding manner;

a second torsion bar, which is symmetrical with the first torsion bar and is adjacent to one side of the second connecting part, one end of the second torsion bar is provided with a second friction torsion part which is sleeved with a second support rod to generate rotational friction torsion, the second support rod is provided with at least one second guide part which is correspondingly connected with the at least one second guide rod in a relatively sliding way; and

a gear set, which comprises a first gear, a middle gear and a second gear which are meshed adjacently in sequence, wherein the first gear is coupled with a first shaft, one end of the first shaft is connected with the other end of the first torsion rod, and the other end of the first shaft is connected and positioned on the seat body; the second gear is coupled to a second shaft, one end of the second shaft is connected to the other end of the second torsion bar, and the other end of the second shaft is connected to and positioned on the seat body.

2. The split hinge structure as claimed in claim 1, wherein the base comprises a first base and a second base, the first base having the first side and the first arc-shaped slot and the second arc-shaped slot which are spaced and juxtaposed; the second base is provided with a second side surface, and the second side surface is provided with a first shaft hole and a second shaft hole which are respectively used for connecting and positioning the first shaft and the second shaft.

3. The split hinge structure as claimed in claim 1, wherein one side of the first connecting portion has two first lugs parallel to each other, a first limiting groove is formed between the two first lugs, the at least one first guide rod passes through the first limiting groove, and two ends of the at least one first guide rod are connected to the two first lugs respectively.

4. The split hinge structure as claimed in claim 1, wherein one side of the second connecting portion has two second lugs parallel to each other, a second limiting groove is formed between the two second lugs, the at least one second guide rod passes through the second limiting groove, and two ends of the at least one second guide rod are connected to the two second lugs respectively.

5. The split hinge structure as claimed in claim 1, wherein the first guiding portion is a through hole radially penetrating the first supporting rod for the first guiding rod to pass through in a relatively slidable manner; the second guide part is a through hole which radially penetrates through the second support rod and is used for the second guide rod to penetrate through in a relatively sliding mode.

6. The split hinge structure as claimed in claim 1, wherein the top of the base body further has a set of first protrusions with opposite end surfaces, the set of first protrusions has a first space therebetween, and the first arc-shaped slot is formed between the set of first protrusions and a first arc-shaped surface of the base body; the first arc part comprises a first arc plate and a first arc convex part, the first arc plate is limited in the first arc groove in a mode of swinging relative to the arc, and the first arc convex part is limited in the first interval.

7. The split hinge structure as claimed in claim 1 or 6, wherein the top of the base body further has a set of second protrusions with opposite end surfaces, the set of second protrusions has a second space therebetween, and the set of second protrusions and a second arc-shaped surface of the base body form the second arc-shaped groove therebetween; the second arc part comprises a second arc plate and a second arc convex part, the second arc plate is limited in the second arc groove in a mode of swinging relative to the arc, and the second arc convex part is limited in the second interval.

8. The split hinge structure as claimed in claim 1, wherein the base further has a first position-limiting portion and a second position-limiting portion on two sides of the top, the first connecting portion has a first pressing portion on one side thereof for pressing and positioning the first position-limiting portion, the second connecting portion has a second pressing portion on one side thereof for pressing and positioning the second position-limiting portion.

9. The split hinge structure as claimed in claim 1, wherein the first shaft and the second shaft respectively pass through the base and are then respectively connected to a first torsion positioning element and a second torsion positioning element; the first torsion positioning piece comprises a plurality of first elastic sheets and a first cap, and the second torsion positioning piece comprises a plurality of second elastic sheets and a second cap for respectively fixing the first shaft and the second shaft in a sleeved mode.

10. The split hinge structure as claimed in claim 9, wherein the first torsion positioning member further comprises at least a first male-female ring, and the second torsion positioning member further comprises at least a second male-female ring for respectively engaging with the first shaft and the second shaft.

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