Double axis synchronous hinge

Abstract

A dual-axis synchronous hinge comprises a base unit including a base, two rotating shaft units arranged at intervals on the base, two movable frame units respectively pivoted on both sides of the base and two linkage units. Each rotating shaft unit comprises a receiving seat arranged on the base and two rotating shafts rotatably arranged on the receiving seat. Each movable frame unit comprises a base plate pivoted on the base unit, two rotating blocks fixedly mounted on the corresponding two rotating shafts and two movable plates movable relative to the rotating blocks. The linkage unit is used to make the rotating shafts rotate synchronously. Each linkage unit comprises a linkage seat arranged on the base, a first gear member rotatably arranged on the linkage seat and two second gear members respectively meshing with the two ends of the first gear member. The two ends of the first gear member are respectively bevel gear heads, and each second gear member has a first shaft portion for the corresponding rotating block to be fixedly mounted and a gear portion connected to the first shaft portion and meshed with the first gear member, and the gear portion is a bevel gear head.

Description

Technical Field

[0001] The invention relates to a hinge, in particular to a double-axis synchronous hinge. Background Art

[0002] In recent years, flexible screens have been widely used in various folding devices, which can be divided into inner folding structures and outer folding structures. When the flexible screen is used in a folding device with an outer folding structure, a conventional hinge has a base, two rotating shafts, two rotating blocks that pivot relative to the base as the rotating shafts rotate, and a movable plate that can move relative to the rotating blocks to approach / move away from the base. However, during the rotation of the rotating shaft, the movable plate may be too far away from the base due to improper operation by the user and detach from the rotating block, causing structural damage. Summary of the invention

[0003] The object of the present invention is to provide a dual-axis synchronous hinge that can solve the above-mentioned problems.

[0004] The dual-axis synchronous hinge of the present invention comprises a base unit, including a base extending along the front-to-back direction; two rotating shaft units, which are arranged on the base at intervals along the front-to-back direction, each rotating shaft unit comprising a receiving seat arranged on the base and two rotating shafts rotatably arranged on the receiving seat; two movable frame units, which are respectively pivoted on both sides of the base along the left-right direction perpendicular to the front-to-back direction, each movable frame unit comprising a base plate pivoted on the base unit, two rotating blocks fixedly sleeved on the corresponding two rotating shafts and two movable plates movable relative to the rotating blocks; and two linkage units, which are respectively arranged on the rotating shaft units to make the rotating shafts rotate synchronously, each linkage unit comprising a base plate arranged on the base unit. The linkage seat of the base, a first gear member extending along the left and right directions and rotatably arranged on the linkage seat, and two second gear members respectively meshing with the two ends of the first gear member, the two ends of the first gear member are respectively bevel gear heads, each second gear member has a first shaft portion for the corresponding rotating block to be fixedly mounted and a gear portion connected to the first shaft portion and meshing with the first gear member, the gear portion is a bevel gear head; wherein, when the two rotating shafts of the rotating shaft unit located on the same side of the base rotate, the corresponding rotating block can drive the corresponding two second gear members to rotate to drive the two second gear members, the rotating block and the rotating shaft located on the other side of the base to rotate, so that the rotating shaft can rotate synchronously.

[0005] The dual-axis synchronous hinge described in the present invention also includes two track bracket units respectively arranged at the front and rear ends of the base, each track bracket unit includes a male joint member fixedly connected to the corresponding movable plate of one of the movable frame units, a female joint member fixedly connected to the corresponding movable plate of the other movable frame unit, and a plurality of track connectors arranged between the male joint member and the female joint member and clamped with each other, each track connector has a main body and a protruding strip extending outward from the main body, and the main body is recessed to form a receiving groove for movably accommodating the protruding strip of the other track connector.

[0006] The dual-axis synchronous hinge described in the present invention has a main body of each track connecting member having a first surface, a second surface opposite to the first surface, an inner surface connecting the first surface and the second surface, and a stop block located in the receiving groove away from the inner surface and flush with the second surface. The protruding strip is formed on the first surface, and the receiving groove is recessed on the second surface and the inner surface. The protruding strip has a blocking block, which can be stopped by the stopping block to prevent the protruding strip from detaching from the receiving groove.

[0007] In the dual-axis synchronous hinge of the present invention, each track connector also has a top plate connected to the body and an outer plate connected to the top plate and spaced apart from the body, and the width of the outer plate in the left-right direction gradually decreases from top to bottom along the up-down direction.

[0008] The dual-axis synchronous hinge described in the present invention has a male joint member of each track bracket unit having a joint protruding strip extending toward the track connecting member, and the joint protruding strip can be movably accommodated in a receiving groove of the track connecting member adjacent to the male joint member, and the female joint member of each track bracket unit has a joint receiving groove for movably accommodating the protruding strip of the track connecting member adjacent to the female joint member.

[0009] In the dual-axis synchronous hinge described in the present invention, the engaging protruding strip of the male engaging member and the protruding strip of the track connecting member are both arc-shaped, and the engaging receiving groove of the female engaging member and the receiving groove of the track connecting member correspond to the protruding strip and the engaging protruding strip respectively and are both arc-shaped.

[0010] The dual-axis synchronous hinge described in the present invention, the base unit also includes two limit fixing parts respectively arranged at the front and rear ends of the base, each limit fixing part is fixedly connected to one of the corresponding track connecting parts of the track bracket unit and has two limit columns extending away from the rotating shaft unit, the base plate of each movable frame unit has two rotation grooves for movably accommodating the corresponding limit columns, the rotation groove has a first end and a second end opposite to the first end, when the track connecting part is in the first position, the limit columns are respectively located at the first end of the rotation groove, when the track connecting part moves from the first position to the second position, the base plate pivots relative to the base so that the limit columns are respectively located at the second end of the rotation groove.

[0011] The double-axis synchronous hinge described in the present invention, each rotating shaft unit also includes two mutually spaced abutment seats for the rotating shaft to movably pass through, two rotating shaft elastic members whose two ends respectively abut the abutment seats, and two pairs of abutment members respectively fixedly sleeved on the rotating shaft and matched with the abutment seats, each abutment seat has two abutment rings corresponding to the abutment members, each abutment ring has a surface facing the abutment member with a plurality of first protrusions and a first recess defined by the first protrusions, and each abutment member has a surface facing the abutment member with a plurality of second protrusions and a second recess defined by the second protrusions, and the abutment member can be transformed between a first state and a second state as the rotating shaft rotates, in the first state, the second protrusion of the abutment member is accommodated in the first recess of the abutment ring, and the second recess of the abutment member corresponds to accommodating the first protrusion of the abutment ring, and in the second state, the second protrusion of the abutment member abuts against the first protrusion of the abutment ring so that the rotating shaft elastic member is compressed.

[0012] The double-axis synchronous hinge described in the present invention, each rotating shaft includes a first penetration section fixedly penetrated through the corresponding rotating block, a stop plate section connected to the first penetration section and abutted against the rotating block, and a second penetration section connected to the stop plate section for the abutment seat, the rotating shaft elastic member and the abutment member to be mounted.

[0013] The double-axis synchronous hinge described in the present invention has a side edge of a rotating block of each movable frame unit recessed to form a locking groove, and each movable frame unit also includes two locking mechanisms respectively arranged on the movable plate and abutting the rotating block, each locking mechanism having a housing, a locking member movably arranged on the housing and abutting the side edge of the rotating block, and a locking elastic member with two ends respectively abutting the housing and the locking member, when the track connecting member is in the first position, the locking member abuts the side edge of the rotating block and the locking elastic member is compressed, and when the track connecting member moves to the second position, the locking member is pushed into the locking groove by the elastic force of the locking elastic member.

[0014] The beneficial effect of the present invention is that: by setting the linkage unit, when the two rotating shafts of the rotating shaft unit located on the same side of the base rotate, the corresponding rotating block can drive the corresponding two second gear members to rotate to drive the two second gear members located on the other side of the base, the rotating block and the rotating shaft to rotate, so that the rotating shaft can rotate synchronously. The first gear member and the second gear member mesh with each other in the direction of the bevel gear head to achieve the linkage effect. Compared with the existing method of meshing spur gears with each other, the volume occupied by the bevel gear head is smaller, which can save the required installation space and can also achieve the linkage effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1is a three-dimensional diagram of an embodiment of a dual-axis synchronous hinge of the present invention, wherein the dual-axis synchronous hinge is in a flattened state;

[0016] Figure 2 is a three-dimensional diagram of the embodiment, wherein the biaxial synchronous hinge is in an outwardly folded state;

[0017] Figure 3 is an incomplete exploded perspective view of the embodiment;

[0018] Figure 4 is another perspective of an incomplete exploded perspective view of the embodiment;

[0019] Figure 5 is an incomplete top view of the embodiment;

[0020] Figure 6 is a partial perspective view of the track bracket unit of this embodiment, wherein two track connecting members are omitted;

[0021] Figure 7 is a partial top view of the track bracket unit of this embodiment, wherein two track connecting members are omitted;

[0022] Figure 8 is a partial rear view of the track bracket unit of this embodiment, in which two track connecting members are omitted;

[0023] Fig. 9 Is Figure 5 A sectional view obtained by the cutting plane line IX-IX of the track connector, showing that the track connector is in the second position;

[0024] Fig.10 Is Figure 5 The cross-sectional view obtained by the cutting line XX of FIG. 1 shows that the track connector is in the second position;

[0025] Fig.11 is similar Fig. 9 , illustrating the track connector in a first position; and

[0026] Fig.12 is similar Fig.10 sectional view showing the track connector in the first position. DETAILED DESCRIPTION

[0027] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0028] See also Figures 1 to 3An embodiment of the dual-axis synchronous hinge 10 of the present invention is suitable for being arranged between two bodies (not shown) to provide a flexible screen (not shown) for arrangement, thereby forming an external foldable electronic device (not shown). It should be noted that in this embodiment, the flexible screen is fixedly arranged on the two bodies and Figure 1 The dual-axis synchronous hinge 10 is located on the upward surface, and the dual-axis synchronous hinge 10 only provides support for the flexible screen rather than a fixed setting, but is not limited to this. The dual-axis synchronous hinge 10 includes a base unit 1, two rotating shaft units 2, two linkage units 3, two movable frame units 4 and two track bracket units 5.

[0029] The base unit 1 includes a base 11 extending in a long and narrow plate shape along the front-to-back direction D1 and two position-limiting fixing members 12 respectively disposed at the front and rear ends of the base 11. Each position-limiting fixing member 12 has two position-limiting posts 121 extending away from the rotating shaft unit 2 and a fixing boss 122 protruding upward, and the functions of the two will be described later.

[0030] See also Figure 1 , Figure 3 and Figure 4The rotating shaft units 2 are arranged on the base 11 at intervals along the front-to-back direction D1, and each rotating shaft unit 2 includes a receiving seat 21 arranged on the base 11, two rotating shafts 22 rotatably arranged on the receiving seat 21, two mutually spaced abutting seats 23 for the rotating shafts 22 to movably pass through, two rotating shaft elastic members 24 whose two ends respectively abut against the abutting seats 23, two pairs of abutting members 25 respectively fixedly sleeved on the rotating shafts 22 and matched with the abutting seats 23, and two stop gaskets 26 respectively fixedly sleeved on the ends of the rotating shafts 22 and abutting against one of the pairs of abutting members 25. Each rotating shaft 22 includes a first penetration section 221 fixedly penetrated through the corresponding movable frame unit 4, a stopper plate section 222 connected to the first penetration section 221 and abutted against the movable frame unit 4, and a second penetration section 223 connected to the stopper plate section 222 for the abutting seat 23, the rotating shaft elastic member 24, and the abutting member 25 to be sleeved. Each abutting seat 23 has two abutting rings 231 corresponding to the abutting member 25, and each abutting ring 231 has a plurality of first protrusions 232 and a first recess 233 defined by the first protrusions 232 on a surface facing the abutting member 25. Each abutting member 25 has a plurality of second protrusions 251 and a second recess 252 defined by the second protrusions 251 on a surface facing the abutting ring 231. The abutment member 25 can be changed between a first state and a second state as the rotating shaft 22 rotates. In the first state, the second protrusion 251 of the abutment member 25 is accommodated in the first notch 233 of the abutting ring 231, and the second notch 252 of the abutment member 25 corresponds to the first protrusion 232 of the abutting ring 231. In the second state, the second protrusion 251 of the abutment member 25 abuts against the first protrusion 232 of the abutting ring 231 so that the rotating shaft elastic member 24 is compressed, thereby providing a torque for the rotating shaft unit 2 and the movable frame unit 4 to pivot relative to the base unit 1, but the method of generating the torque is not limited to this form. The stop gasket 26 is used to prevent the rotating shaft 22 from deviating in its axial direction.

[0031] See also Figures 3 to 5, the linkage units 3 are respectively arranged on the shaft units 2 to make the shafts 22 rotate synchronously. Each linkage unit 3 includes a linkage seat 31 arranged on the base 11, a first gear member 32 rotatably arranged on the linkage seat 31 extending along the left-right direction D2 perpendicular to the front-back direction D1, two second gear members 33 respectively meshing with the two ends of the first gear member 32, and a positioning gasket 34. The two ends of the first gear member 32 are bevel gear heads, and each second gear member 33 has a first shaft portion 331, a gear portion 332 connected to the first shaft portion 331 and meshing with the first gear member 32, and a second shaft portion 333 connected to the gear portion 332 and extending away from the first shaft portion 331. The gear portion 332 is a bevel gear head. The positioning gasket 34 is fixedly sleeved on the second shaft portion 333 and abuts against the linkage seat 31 to prevent the second gear member 33 from shifting in the axial direction. When one of the second gear members 33 rotates, the gear portion 332 of the second gear member 33 drives the first gear member 32 to rotate, and then drives the gear portion 332 of the other second gear member 33 to rotate, thereby achieving a linkage effect. The linkage unit 3 utilizes the first gear member 32 and the second gear member 33 to mesh with each other in the direction of the bevel gear head to achieve a linkage effect. Compared with the existing method of meshing spur gears with each other, the volume occupied by the bevel gear head is smaller, which can save the required installation space and can also achieve a linkage effect.

[0032] See also Figures 3 to 5 , the movable frame units 4 are respectively pivoted on both sides of the base 11 along the left-right direction D2. Each movable frame unit 4 includes a base plate 41 pivoted on the base unit 1 and fixed to the machine body (not shown), two rotating blocks 42 fixedly sleeved on the first penetration sections 221 of the corresponding two rotating shafts 22 and the first shaft portions 331 of the corresponding two second gear members 33, two movable plates 43 movable relative to the rotating blocks 42 and fixed to the machine body (not shown), and two locking mechanisms 44 respectively arranged on the movable plates 43 and abutting against the rotating blocks 42. Each base plate 41 has two rotating grooves 411 for movably accommodating the corresponding limiting pillars 121, and the rotating grooves 411 have a first end 411a and a second end 411b opposite to the first end 411a. The rotating block 42 is fixedly sleeved on the rotating shaft 22 and the second gear member 33 at the same time, so that when one of the rotating shafts 22 rotates, the other rotating shaft 22 can be synchronously driven to rotate through the linkage unit 3. The side edge of each rotating block 42 is recessed to form a locking groove 421. Each locking mechanism 44 has a housing 441, a locking member 442 that is movably disposed on the housing 441 and abuts against the side edge of the rotating block 42 and is generally in the shape of a small disk, and a locking elastic member 443 whose two ends respectively abut against the housing 441 and the locking member 442.

[0033] See also Figure 3 , Figures 6 to 8 The track bracket units 5 are respectively arranged at the front and rear ends of the base 11, and each track bracket unit 5 includes a male joint member 51 fixedly connected to the corresponding movable plate 43 of one of the movable frame units 4, a female joint member 52 fixedly connected to the corresponding movable plate 43 of another movable frame unit 4, and three track connecting members 53 arranged between the male joint member 51 and the female joint member 52 and connected to each other. Each track connecting member 53 has a body 531, a protruding strip 532 extending outward from the body 531, a top plate 533 connected to the body 531, and an outer plate 534 connected to the top plate 533 and spaced from the body 531. The body 531 has a first surface 531a, a second surface 531b opposite to the first surface 531a, an inner surface 531c connecting the first surface 531a and the second surface 531b, a receiving groove 531d formed in the second surface 531b and the inner surface 531c, and a stopper 531e located in the receiving groove 531d away from the inner surface 531c and flush with the second surface 531b. The protruding strip 532 is formed on the first surface 531a and has a block 532a. The top plate 533 is formed with a through hole 533a that can engage with the corresponding fixed boss 122 of the limiting fixing member 12. In this embodiment, the fixed boss 122 passes through the through hole 533a of the track connecting member 53 located in the middle, but this is not limited to this. The width of the outer plate 534 in the left-right direction D2 decreases from top to bottom along an up-down direction D3 perpendicular to the front-back direction D1 and the left-right direction D2. The male joint 51 has a joint protruding strip 511 extending toward the track connector 53, and the joint protruding strip 511 can be movably accommodated in a receiving groove 531d of the track connector 53 adjacent to the male joint 51, and has a joint block 511a. The female joint 52 has a joint receiving groove 521 for movably accommodating a protruding strip 532 of the track connector 53 adjacent to the female joint 52, and a joint stop block 522 located in the joint receiving groove 521. The number of the track connectors 53 is not limited to three in the present embodiment, as long as there are multiple and odd numbers, and the size can be adjusted according to the number.

[0034] See also Figure 1 and Figure 2 Each track connection member 53 can rotate between a first position and a second position. Fig.11 and Fig.12In the first position, the biaxial synchronous hinge 10 is correspondingly located in an outward folding state, the protruding strip 532 of each track connector 53 is completely accommodated in the receiving groove 531d of the other track connector 53, and the engaging protruding strip 511 of the male joint member 51 is completely accommodated in the corresponding receiving groove 531d of the track connector 53, wherein the protruding strip 532 of one track connector 53 is completely accommodated in the engaging receiving groove 521 of the female joint member 52, so that the track connectors 53 are close to each other and the male joint member 51 and the female joint member 52 both extend along an up-down direction D3 perpendicular to the front-to-back direction D1 and the left-to-right direction D2, and the movable plate 43 also extends in the up-down direction D3 and is adjacent to the rotating shaft 22, at this time, the locking member 442 abuts against the side edge of the rotating block 42 and the locking elastic member 443 is compressed, and the limiting posts 121 are respectively located at the first ends 411a of the rotating grooves 411. For reference Fig. 9 and Fig.10 In the second position, the biaxial synchronous hinge 10 is in a flattened state, the protruding strip 532 of each track connecting member 53 and the engaging protruding strip 511 of the male engaging member 51 are partially accommodated in the receiving groove 531d of the other track connecting member 53, one of the protruding strips 532 is partially accommodated in the engaging receiving groove 521 of the female engaging member 52, and the block 532a and the engaging block 511a are both engaged with the stop block 531e, one of the block 532a is engaged with the engaging stop block 522, so that the track connecting members 53 are separated from each other, that is, extended and pulled out a distance from each other. , and the male engaging member 51 and the female engaging member 52 both extend along the left-right direction D2 and respectively drive the corresponding movable plate 43 to move away from the rotating shaft 22 relative to the rotating block 42. At this time, the base plate 41 pivots relative to the base 11 so that the limiting column 121 is respectively located at the second end 411b of the rotating groove 411, and the locking member 442 is pushed into the locking groove 421 by the elastic force of the locking elastic member 443, providing a locking feel, so that the dual-axis synchronous hinge 10 can easily stay in the flattened state to facilitate the user to use and operate the flexible screen (not shown). It should be noted that in this embodiment, the engagement protruding strip 511 of the male engagement member 51 and the protruding strip 532 of the track connection member 53 are both in arc shape, and the engagement receiving groove 521 of the female engagement member 52 and the receiving groove 531d of the track connection member 53 correspond to the protruding strip 532 and the engagement protruding strip 511, respectively, but the present invention is not limited thereto. Such a design can save space while increasing the distance between the track connection members 53 when they are in the second position.

[0035] In summary, when the dual-axis synchronous hinge 10 of the present invention can rotate between the first position and the second position by means of the track connector 53 of the track bracket unit 5, the block 532a of the protruding strip 532 can be stopped by the stopping block 531e to prevent the protruding strip 532 from detaching from the receiving groove 531d, and because the male coupling member 51 and the female coupling member 52 are fixedly connected to the movable plate 43, the protruding strip 532 will not detach from the receiving groove 531d, thereby synchronously preventing the movable plate 43 from continuing to move away from the rotating shaft 22 and possibly separating from the rotating block 42, thereby effectively achieving the purpose of the present invention.

[0036] However, the above is only an embodiment of the present invention and should not be used to limit the scope of the present invention. All simple equivalent changes and modifications made according to the claims and description of the present invention are still within the scope of the present invention.

Claims

1. A dual-axis synchronous hinge, characterized in that: The biaxial synchronous hinge comprises: A base unit including a base extending in a front-to-rear direction; Two rotating shaft units are arranged on the base at intervals along the front-to-back direction, each rotating shaft unit comprises a receiving seat arranged on the base and two rotating shafts rotatably arranged on the receiving seat; Two movable frame units are respectively pivoted on both sides of the base along the left-right direction perpendicular to the front-back direction, each movable frame unit comprises a base plate pivoted on the base unit, two rotating blocks fixedly sleeved on the corresponding two rotating shafts, and two movable plates movable relative to the rotating blocks; Two linkage units are respectively arranged on the rotating shaft units to make the rotating shafts rotate synchronously, each linkage unit includes a linkage seat arranged on the base, a first gear member extending along the left-right direction and rotatably arranged on the linkage seat, and two second gear members respectively meshing with two ends of the first gear member, the two ends of the first gear member are respectively bevel gear heads, each second gear member has a first shaft portion for the corresponding rotating block to be fixedly mounted thereon and a gear portion connected to the first shaft portion and meshing with the first gear member, and the gear portion is a bevel gear head; and Two track bracket units are respectively arranged at the front and rear ends of the base, each track bracket unit comprises a male joint piece fixedly connected to the corresponding movable plate of one of the movable frame units, a female joint piece fixedly connected to the corresponding movable plate of the other movable frame unit, and a plurality of track connectors arranged between the male joint piece and the female joint piece and connected to each other; When the two rotating shafts of the rotating shaft unit located on the same side of the base rotate, the corresponding rotating block can drive the corresponding two second gear members to rotate, thereby driving the two second gear members, the rotating block and the rotating shaft located on the other side of the base to rotate, so that the rotating shafts can rotate synchronously; The base unit also includes two limiting fixing members respectively arranged at the front and rear ends of the base, each limiting fixing member is fixedly connected to one of the track connecting members of the corresponding track bracket unit and has two limiting columns extending away from the rotating shaft unit, and the base plate of each movable frame unit has two rotating grooves for movably accommodating the corresponding limiting columns.

2. The dual-axis synchronous hinge according to claim 1, characterized in that: Each track connecting member has a body and a protruding strip extending outward from the body. The body is recessed to form a receiving groove for movably accommodating the protruding strip of another track connecting member.

3. The dual-axis synchronous hinge according to claim 2, characterized in that: The main body of each rail connecting member has a first surface, a second surface opposite to the first surface, an inner surface connecting the first surface and the second surface, and a stop block located in the receiving groove away from the inner surface and flush with the second surface. The protruding strip is formed on the first surface, and the receiving groove is recessed on the second surface and the inner surface. The protruding strip has a blocking block, which can be stopped by the stopping block to prevent the protruding strip from detaching from the receiving groove.

4. The dual-axis synchronous hinge according to claim 3, characterized in that: Each track connector also has a top plate connected to the body and an outer plate connected to the top plate and spaced apart from the body. The width of the outer plate in the left-right direction decreases gradually from top to bottom along the up-down direction.

5. The dual-axis synchronous hinge according to claim 3, characterized in that: The male engaging member of each track bracket unit has an engaging protruding strip extending toward the track connecting member, and the engaging protruding strip can be movably accommodated in the receiving groove of the track connecting member adjacent to the male engaging member. The female engaging member of each track bracket unit has an engaging receiving groove for movably accommodating the protruding strip of the track connecting member adjacent to the female engaging member.

6. The dual-axis synchronous hinge according to claim 5, characterized in that: The engaging protruding strip of the male engaging member and the protruding strip of the track connecting member are both in arc shape, and the engaging receiving groove of the female engaging member and the receiving groove of the track connecting member correspond to the protruding strip and the engaging protruding strip respectively and are both in arc shape.

7. The dual-axis synchronous hinge according to claim 2, characterized in that: Each rotating groove has a first end and a second end opposite to the first end. When the track connecting member is in the first position, the limiting posts are respectively located at the first end of the rotating groove. When the track connecting member moves from the first position to the second position, the base plate pivots relative to the base so that the limiting posts are respectively located at the second end of the rotating groove.

8. The dual-axis synchronous hinge according to claim 1, characterized in that: Each rotating shaft unit also includes two mutually spaced abutment seats for the rotating shaft to movably pass through, two rotating shaft elastic members whose two ends respectively abut the abutment seats, and two pairs of abutment members respectively fixedly sleeved on the rotating shaft and matched with the abutment seats, each abutment seat has two abutment rings corresponding to the abutment members, each abutment ring has a plurality of first protrusions and a first recess defined by the first protrusions on a surface facing the abutment member, and each abutment member has a plurality of second protrusions and a second recess defined by the second protrusions on a surface facing the abutment ring, and the abutment member can be transformed between a first state and a second state as the rotating shaft rotates, in the first state, the second protrusion of the abutment member is accommodated in the first recess of the abutment ring, and the second recess of the abutment member corresponds to accommodating the first protrusion of the abutment ring, and in the second state, the second protrusion of the abutment member abuts against the first protrusion of the abutment ring so that the rotating shaft elastic member is compressed.

9. The dual-axis synchronous hinge according to claim 8, characterized in that: Each rotating shaft comprises a first penetration section fixedly penetrated in the corresponding rotating block, a stopper disc section connected to the first penetration section and clamped against the rotating block, and a second penetration section connected to the stopper disc section for the clamping seat, the rotating shaft elastic member and the clamping member to be sleeved.

10. The dual-axis synchronous hinge according to claim 2, characterized in that: The side edge of the rotating block of each movable frame unit is recessed to form a locking groove. Each movable frame unit also includes two locking mechanisms respectively arranged on the movable plate and abutting the rotating block. Each locking mechanism has a shell, a locking member movably arranged on the shell and abutting the side edge of the rotating block, and a locking elastic member with two ends respectively abutting the shell and the locking member. When the track connecting member is in the first position, the locking member abuts the side edge of the rotating block and the locking elastic member is compressed. When the track connecting member moves to the second position, the locking member is pushed into the locking groove by the elastic force of the locking elastic member.

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