TWM617379U - Biaxial synchronous hinge - Google Patents

Abstract

A dual-axis synchronous hinge includes a base unit including a base, two rotating shaft units arranged at intervals on the base, two linkage units, and two movable frames pivoted on both sides of the base respectively The unit and two rail support units respectively arranged at the front and rear ends of the base. Each rotating shaft unit includes a receiving seat arranged on the base and two rotating shafts rotatably arranged on the receiving seat. Each movable frame unit includes 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. Each rail support unit includes a male connector, a female connector, and a plurality of rail connectors arranged between the male connector and the female connector. Each rail connecting piece has a body and a protruding strip extending outward from the body. The main body is recessed to form a receiving groove and a stop block located in the receiving groove, the protruding strip has a blocking block, and the blocking block can be stopped by the stop block to prevent the protruding strip from escaping from the receiving groove.

Description

Two-axis synchronous hinge

This new model relates to a hinge, in particular to a dual-axis synchronous hinge.

In recent years, flexible screens have been widely used in various foldable devices. These foldable devices can be divided into an in-folding structure and an out-folding structure. When the flexible screen is applied to a foldable device that belongs to an out-folding structure, An existing 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 block to move closer to/away from the base. However, in the process of rotating 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, which may cause structural damage.

Therefore, one of the objectives of the present invention is to provide a dual-axis synchronous hinge that can solve the above-mentioned problems.

Therefore, the dual-axis synchronous hinge of the present invention includes a base unit including a base extending along a front-to-rear direction; two rotating shaft units are arranged on the base at intervals along the front-to-rear direction, and each rotating shaft unit includes A receiving seat arranged on the base and two rotating shafts rotatably arranged on the receiving seat; two interlocking units are respectively arranged on the rotating shaft units for synchronous rotation of the rotating shafts; two movable frame units , Are respectively pivoted on both sides of the base along a left and right direction perpendicular to the front and rear direction, each movable frame unit includes a base plate pivoted on the base unit, two fixedly sleeved on the corresponding two A rotating block with a rotating shaft and two movable plates that can move relative to the rotating block; and two rail bracket units are respectively arranged at the front and rear ends of the base, and each rail bracket unit includes a movable frame fixedly connected to one of them The male joint of the corresponding movable plate of the unit, a female joint of the corresponding movable plate of the other movable frame unit, and a plurality of the male joints and the female joints are clamped to each other. The track connecting piece, each track connecting piece has a body and a protruding strip extending outward from the body, the body recessed to form a receiving groove for the protruding strip of the other track connecting piece to be movably accommodated and A stopper located in the receiving groove, the protruding strip has a locking block, the stopper can be stopped by the stopper to prevent the protruding strip from detaching from the receiving groove; wherein, each rail connecting piece can Rotate between a first position and a second position. When in the first position, the protruding strip of each rail connector is completely accommodated in the receiving groove of the other rail connector, so that the rails are connected And the male joint part and the female joint part extend along an up-down direction perpendicular to the front-rear direction and the left-right direction. The movable plates also extend in the up-down direction and are adjacent to the rotating shaft. Position, the protruding strip part of each rail connecting piece is accommodated in the receiving slot of the other rail connecting piece and the blocking block is engaged with the stop block, so that the rail connecting pieces are far away from each other and the male The joint and the female joint extend along the left and right directions and respectively drive the corresponding movable plates to move away from the rotating shaft with respect to the rotating block.

In some embodiments, the body of each rail connector has a first surface, a second surface opposite to the first surface, and an inner surface connecting the first surface and the second surface, the convex A strip is formed on the first surface, the receiving groove is recessed on the second surface and the inner surface, and the stop block is away from the inner surface and is flush with the second surface.

In some embodiments, each rail connector further has a top plate connected to the main body and an outer plate connected to the top plate and spaced apart from the main body, and the width of the outer plate in the left and right direction is along the up and down direction Decrease from top to bottom.

In some embodiments, the male joint of each rail support unit has a joint protruding strip extending toward the rail joints, and the joint protruding strip can be movably accommodated in the joint adjacent to the male joint. The receiving groove of the rail connecting piece, the female joint piece of each rail support unit has a joint receiving groove for movably receiving the protruding bar of the track connecting piece adjacent to the female joint piece.

In some embodiments, the protruding strips of the male coupling member and the protruding strips of the rail connectors are arc-shaped, and the coupling receiving groove of the female coupling member and the accommodating members of the rail connectors The grooves respectively correspond to the protruding strips and the joint protruding strips are arc-shaped.

In some embodiments, the base unit further includes two limit fixing members respectively disposed at the front and rear ends of the base, and each limit fixing member is fixedly connected to one of the rail connecting members of the corresponding rail support unit and There are two limit posts extending away from the rotating shaft unit. The base plate of each movable frame unit has a rotating groove for movably receiving the corresponding limit posts. The rotating groove has a first end and an opposite end. The second end of the first end, when the rail connecting pieces are in the first position, the limit posts are respectively located at the first ends of the rotating grooves, and when the rail connecting pieces move from the first position When reaching the second position, the base plates pivot relative to the base so that the limiting posts are respectively located at the second ends of the rotating grooves.

In some embodiments, each linkage unit includes a linkage seat provided on the base, a first gear member rotatably provided on the linkage seat extending along the left and right direction, and two gear members respectively engaged with the first gear member. The second gear pieces at both ends of the gear piece are respectively bevel gear heads at both ends of the first gear piece. Each second gear piece has a first shaft portion for the corresponding rotating block to be fixedly sleeved and a first shaft connected to the first gear piece. A shaft part is meshed with the gear part of the first gear member, and the gear part is a bevel gear head.

In some implementations, each rotating shaft unit further includes two pivoting seats spaced apart from each other for the pivoting shafts to movably pass through, two pivotal elastic members whose two ends respectively abut against the pivoting seats, and two pairs The retaining members respectively fixedly sleeved on the rotating shafts and matched with the retaining seats, each retaining seat has two retaining rings corresponding to the retaining components, and each retaining ring faces the retaining component A plurality of first protrusions and a first notch defined by the first protrusions are formed on the surface of each of the retaining members, and a plurality of second protrusions are formed on the surface of each retaining member facing the retaining ring and formed by the second projections. The second recesses defined by the protrusions are capable of changing between a first state and a second state with the rotation of the rotating shafts. In the first state, the first state of the retaining members The two protrusions are accommodated in the first recesses of the retaining rings, and the second recesses of the retaining members correspondingly accommodate the first protrusions of the retaining rings. In the second state, the retaining rings are The second protrusion of the member abuts against the first protrusions of the abutting rings so that the elastic member of the rotating shaft is compressed.

In some embodiments, each rotation shaft includes a first penetration section fixedly piercing the corresponding rotation block, a stop disc section connected to the first penetration section and clamped against the rotation block, and A second penetration section connected to the stop disc section for the card abutment seats, the rotating shaft elastic members and the card abutment members to be sleeved.

In some embodiments, a side edge of the rotating block of each movable frame unit is recessed to form a locking groove, and each movable frame unit further includes two locking mechanisms respectively disposed on the movable plate and abutting against the rotating blocks Each locking mechanism has a casing, a locking member movably arranged on the casing and abutting the side edge of the rotating block, and a locking elastic member whose two ends respectively abut the casing and the locking member. When the rails When the connecting member is in the first position, the locking member abuts against the side edge of the rotating block and the elastic locking member is compressed. When the rail connecting members move to the second position, the locking member is affected by the elastic locking member. The elastic force pushes and enters the locking groove.

The present invention has at least the following effects: when the rail connecting pieces of the rail bracket units can be rotated between the first position and the second position, the locking blocks of the protruding strips can be blocked by the stop blocks Stop to prevent the protruding strips from detaching from the accommodating grooves, and because the male joints and the female joints are fixed to the movable plates, once the protruding strips will not detach from the accommodating grooves This can synchronously prevent the movable plates from continuously moving away from the rotating shafts and possibly being separated from the rotating blocks.

1 to 3, an embodiment of the new dual-axis synchronous hinge 10 is suitable for being installed between two bodies (not shown) to provide a flexible screen (not shown) together, and then It constitutes an external folding electronic device (not shown in the figure). It should be noted that, in this embodiment, the flexible screen is fixedly disposed on the two bodies and located on the upwardly facing surfaces in FIG. 1, and the dual-axis synchronous hinge 10 only provides the flexible screen Support rather than a fixed setting, but 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 rail support units 5.

The base unit 1 includes a base 11 extending along a front and rear direction D1 in a slender plate shape and two limit fixing members 12 respectively disposed at the front and rear ends of the base 11. Each limiting and fixing member 12 has two limiting posts 121 extending away from the rotating shaft unit 2 and a fixing protruding post 122 protruding upward, the functions of which will be described later.

Referring to Figures 1, 3 and 4, the rotating shaft units 2 are arranged on the base 11 at intervals along the front-rear direction D1. Each rotating shaft unit 2 includes a receiving seat 21 and two A rotating shaft 22 rotatably disposed on the receiving seat 21, two retaining seats 23 spaced apart from each other for the rotating shafts 22 to movably pass through, and two ends respectively abutting on the rotating shaft elastic members of the retaining seats 23 24. Two pairs of abutting members 25 respectively fixedly sleeved on the rotating shafts 22 and matched with the abutting seat 23, and two respectively fixedly sleeved on the ends of the rotating shafts 22 and abutting against one of the pair of abutting members 25 The stop washer 26. Each rotating shaft 22 includes a first penetration section 221 fixedly passing through the corresponding movable frame unit 4, and a stop disc section 222 connected to the first penetration section 221 and clamped against the movable frame unit 4 And a second penetration section 223 connected to the stop disc section 222 for the card abutment seats 23, the rotating shaft elastic members 24 and the card abutment members 25 to be sleeved. Each locking seat 23 has two locking rings 231 corresponding to the locking members 25, and each locking ring 231 is formed with a plurality of first protrusions 232 on the surface of the locking member 25, and the first protrusions 232 are formed by the first protrusions 232. A protrusion 232 defines a first recess 233 with each other. A surface of each locking member 25 facing the locking ring 231 is formed with a plurality of second protrusions 251 and second recesses 252 defined by the second protrusions 251 from each other. The detent members 25 can be changed between a first state and a second state as the rotation shafts 22 rotate. In the first state, the second protrusions 251 of the detent members 25 are accommodated in the Equal to the first recess 233 of the retaining ring 231, the second recess 252 of the retaining member 25 correspondingly accommodates the first protrusion 232 of the retaining ring 231, and in the second state, the retaining ring 231 The second protrusions 251 of the member 25 abut the first protrusions 232 of the retaining rings 231 so that the pivot elastic member 24 is compressed, thereby providing the pivot units 2 and the movable frame unit 4 relative to the base unit 1 Pivoting torsion, but the way to generate torsion is not limited to this form. The stop washers 26 are used to prevent the rotation shafts 22 from deviating in the axial direction.

Referring to FIGS. 3 to 5, the interlocking units 3 are respectively arranged on the rotating shaft units 2 for synchronously rotating the rotating shafts 22. Each linkage unit 3 includes a linkage seat 31 disposed on the base 11, a first gear member 32 that extends along a left-right direction D2 perpendicular to the front-rear direction D1 and is rotatably disposed on the linkage seat 31, and two A second gear member 33 and a positioning washer 34 respectively engage the two ends of the first gear member 32. Both ends of the first gear member 32 are bevel gear heads, and each second gear member 33 has a first shaft portion 331 and a gear portion 332 connected to the first shaft portion 331 and meshed with the first gear member 32 And a second shaft portion 333 that is connected to the gear portion 332 and extends away from the first shaft portion 331. The gear part 332 is a bevel gear head. The positioning washer 34 is fixedly sleeved on the second shaft portions 333 and abuts against the linkage seat 31 to prevent the second gear member 33 from deviating in the axial direction. When one of the second gear members 33 rotates, the gear portion 332 of the second gear member 33 will drive the first gear member 32 to rotate, which in turn will drive the gear portion 332 of the other second gear member 33 to rotate, so as to achieve the 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 the effect of linkage. Compared with the prior art in which spur gears mesh with each other, the bevel gear head occupies a larger volume. Small, can save the required installation space and can also achieve the effect of linkage.

Referring to FIGS. 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 body (not shown), and two first penetration sections 221 fixedly sleeved on the corresponding two rotating shafts 22 And the corresponding rotating blocks 42 of the first shaft portion 331 of the two second gear members 33, two movable plates 43 that are movable relative to the rotating block 42 and fixed to the body (not shown), and two movable plates 43 respectively provided The movable plate 43 abuts against the locking mechanism 44 of the rotating blocks 42. Each base plate 41 has two rotating grooves 411 for movably receiving the corresponding limit posts 121. The rotating grooves 411 have a first end 411a and a second end 411b opposite to the first end 411a. The rotating blocks 42 are fixed and sleeved on the rotating shafts 22 and the second gear members 33 at the same time, so that when one of the rotating shafts 22 rotates, the other rotating shaft 22 can be driven to rotate synchronously 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 movably disposed on the housing 441 and abutting the rotating block 42 and having a substantially small disc-shaped side edge, and two ends respectively abutting the housing 441 and the housing 441. The elastic member 443 of the locking member 442 is locked.

Referring to FIGS. 3 and 6 to 8, the rail support units 5 are respectively disposed at the front and rear ends of the base 11, and each rail support unit 5 includes a corresponding movable plate fixed to one of the movable rack units 4 43 male connector 51, a female connector 52 fixed to the corresponding movable plate 43 of the other movable frame unit 4, and three are arranged between the male connector 51 and the female connector 52 to be clamped to each other的路连接件53。 The track connection 53. Each rail connecting member 53 has a main body 531, a protruding strip 532 extending outward from the main body 531, a top plate 533 connected to the main body 531, and an outer plate 534 connected to the top plate 533 and spaced apart from the main 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, and a recess formed on the second surface 531b, the receiving groove 531d of the inner surface 531c, and a stop block 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 blocking block 532a. The top plate 533 is formed with a through hole 533a that can be engaged with the fixed protrusion 122 of the corresponding limit fixing member 12. In this embodiment, the fixed protrusion 122 passes through the through hole 533a of the rail connecting member 53 located in the middle, but It is not limited by this. The width of the outer plate 534 in the left-right direction D2 gradually decreases from top to bottom along an up-down direction D3 perpendicular to the front-rear direction D1 and the left-right direction D2. The male engaging member 51 has an engaging protrusion 511 extending toward the rail connecting members 53, and the engaging protrusion 511 can be movably received in the receiving groove 531d of the rail connecting member 53 adjacent to the male engaging member 51 , And has a joint block 511a. The female joint 52 has a joint receiving groove 521 for movably receiving the protruding strip 532 of the rail connecting member 53 adjacent to the female joint 52 and a joint stop block 522 located in the joint receiving groove 521. Wherein, the number of the rail connecting members 53 is not limited to the three in this embodiment, as long as there are more than one and an odd number, and the size can be adjusted corresponding to the number.

1 and 2, each track connecting member 53 can rotate between a first position and a second position. With reference to Figures 11 and 12, in the first position, the dual-axis synchronous hinge 10 is correspondingly located in an outwardly folded state, and the protruding strip 532 of each rail connecting member 53 is completely accommodated in the other rail connection In the receiving groove 531d of the member 53, the protruding strip 511 of the male joint 51 is completely accommodated in the receiving groove 531d of the corresponding rail connector 53, and the protruding strip 532 of one of the rail connectors 53 is completely accommodated In the joint receiving groove 521 of the female joint 52, so that the rail connecting members 53 are close to each other and the male joint 51 and the female joint 52 are along a vertical direction D1 and the left-right direction D2. Extending in the up-down direction D3, the movable plates 43 also extend in the up-down direction D3 and are 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. The posts 121 are respectively located at the first ends 411 a of the rotating grooves 411. With reference to Figures 9 and 10, in the second position, the dual-axis synchronous hinge 10 is correspondingly in a flat state, and the protruding strip 532 of each rail connecting member 53 and the male joint member 51 are joined The protruding strip 511 is partially accommodated in the receiving groove 531d of the other rail connecting member 53, one of the protruding strips 532 is partially accommodated in the engaging and receiving groove 521 of the female engaging member 52, and the block 532a and the engaging block 511a are all engaged with the stopping block 531e, and one of the locking blocks 532a is engaged with the engagement stopping block 522, so that the rail connecting members 53 are far away from each other, that is, they extend a distance from each other and the male engagement member 51 And the female coupling member 52 extend along the left and right direction D2 and respectively drive the corresponding movable plates 43 to move away from the rotating shaft 22 with respect to the rotating block 42. At this time, the base plates 41 pivot relative to the base 11 The limiting posts 121 are respectively located at the second ends 411b of the rotating grooves 411, and the locking members 442 are pushed by the elastic force of the locking elastic members 443 to enter the locking groove 421, providing a locking feel. The dual-axis synchronous hinge 10 is easy to stay in the flat state, which is convenient for the user to use and operate the flexible screen (not shown in the figure). It should be noted that, in this embodiment, the protruding strips 511 of the male joint 51 and the protruding strips 532 of the rail connectors 53 are both arc-shaped, and the joint receiving of the female joint 52 The grooves 521 and the receiving grooves 531d of the rail connecting members 53 respectively correspond to the protruding bars 532 and the engaging protruding bars 511 in an arc shape, but are not limited thereto. Such a design can increase the distance between the rail connecting members 53 when they are located in the second position while saving space.

In summary, the dual-axis synchronous hinge 10 of the present invention can be rotated between the first position and the second position by the rail connecting members 53 of the rail bracket units 5, and the protruding bars 532 The blocking blocks 532a can be blocked by the blocking blocks 531e to prevent the protruding strips 532 from detaching from the receiving grooves 531d, and because the male joint parts 51 and the female joint parts 52 are fixed to the movable plates 43. Once the protruding strips 532 will not detach from the receiving grooves 531d, they can synchronously prevent the movable plates 43 from continuously moving away from the rotating shafts 22 and possibly being separated from the rotating blocks 42. Therefore, it is indeed possible to achieve a new type of Purpose.

However, the above are only examples of the present model, and should not be used to limit the scope of implementation of the present model, all simple equivalent changes and modifications made in accordance with the patent scope of the present model application and the contents of the patent specification still belong to This new patent covers the scope.

10: Two-axis synchronous hinge 1: base unit 11: Pedestal 12: Limit fixing parts 121: limit post 122: fixed boss 2: Rotating shaft unit 21: Containment Seat 22: shaft 221: First Wearing Section 222: Stop disk segment 223: Second Wearing Section 23: Card arrives 231: Card to Ring 232: The first protrusion 233: first notch 24: Rotating shaft elastic part 25: Card payment 251: second protrusion 252: second notch 26: Stop gasket 3: Linkage unit 31: Linkage seat 32: The first gear piece 33: The second gear piece 331: first shaft 332: Gear Department 333: second shaft 34: Positioning gasket 4: movable rack unit 41: substrate 411: Rotation Slot 411a: first end 411b: second end 42: Rotating block 421: Locking Slot 43: activity board 431: active slot 44: Locking mechanism 441: Shell 442: Locking Piece 443: Locking elastic part 5: Rail bracket unit 51: male connector 511: Joint protruding strip 511a: Joint block 52: Female connector 521: Joint Containment Slot 522: Engagement Stop 53: Rail connection 531: body 531a: first surface 531b: second surface 531c: inner surface 531d: containment slot 531e: stop block 532: protruding strip 532a: card block 533: top plate 533a: Piercing 534: Outer Board D1: front and rear direction D2: Left and right direction D3: Up and down direction

The other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, among which: Figure 1 is a perspective view of an embodiment of the novel dual-axis synchronous hinge, the dual-axis synchronous hinge is in a flat state; Figure 2 is a perspective view of the embodiment, the dual-axis synchronous hinge is in an outwardly folded state; Figure 3 is an incomplete three-dimensional exploded view of the embodiment; Figure 4 is another perspective of an incomplete exploded view of the embodiment; Figure 5 is an incomplete top view of the embodiment; Figure 6 is a partial perspective view of a rail bracket unit of this embodiment, in which two rail connectors are omitted; Figure 7 is a partial top view of a rail support unit of this embodiment, in which two rail connectors are omitted; Figure 8 is a partial rear view of a rail bracket unit of this embodiment, in which two rail connectors are omitted; Figure 9 is a cross-sectional view taken from the secant line IX-IX of Figure 5, illustrating the rail connectors in a second position; Fig. 10 is a cross-sectional view taken from the cutting plane line X-X of Fig. 5, illustrating that the rail connectors are in the second position; Fig. 11 is a cross-sectional view similar to Fig. 9 illustrating a first position of the rail connectors; and Fig. 12 is a cross-sectional view similar to Fig. 10, illustrating that the rail connectors are in the first position.

10: Two-axis synchronous hinge

1: base unit

11: Pedestal

2: Rotating shaft unit

21: Containment Seat

22: shaft

26: Stop gasket

3: Linkage unit

4: movable rack unit

41: substrate

42: Rotating block

43: activity board

44: Locking mechanism

5: Rail bracket unit

51: male connector

52: Female connector

53: Rail connection

Claims (10)

A two-axis synchronous hinge, including: A base unit, including a base extending along a front-to-rear direction; Two rotating shaft units are arranged on the base at intervals along the front-rear direction, and each rotating shaft unit includes a receiving seat arranged on the base and two rotating shafts rotatably arranged on the receiving seat; Two linkage units are respectively arranged on the rotating shaft units to make the rotating shafts rotate synchronously; Two movable frame units are respectively pivoted on both sides of the base along a left and right direction perpendicular to the front and rear direction. Each movable frame unit includes a base plate pivoted on the base unit, and two fixed sleeves Rotating blocks corresponding to the two rotating shafts and two movable plates movable relative to the rotating blocks; and Two rail support units are respectively arranged at the front and rear ends of the base, and each rail support unit includes a male joint that is fixed to one of the movable rack units and corresponding to the movable plate, and one is fixed to the other movable rack. The female connector of the movable plate corresponding to the unit and a plurality of rail connectors arranged between the male connector and the female connector are clamped to each other, each rail connector has a body and a body outwardly from the body An extended protruding strip, the body is recessed to form a receiving groove for movably receiving the protruding strip of another rail connector and a stop block located in the receiving groove, the protruding strip has a clamping block, the The blocking block can be blocked by the blocking block to prevent the protruding strip from escaping from the receiving groove; Wherein, each track connecting piece can be rotated between a first position and a second position, and in the first position, the protruding strip of each track connecting piece is completely accommodated in the receiving groove of the other track connecting piece Inside, so that the rail connecting parts are close to each other and the male joint part and the female joint part extend along a vertical direction perpendicular to the front and rear direction and the left and right direction, and the movable plates also extend in the vertical direction and Adjacent to the rotating shaft, when in the second position, the protruding strip portion of each rail connector is received in the receiving slot of the other rail connector, and the locking block is engaged with the stopping block, so that the The rail connecting pieces are far away from each other, and the male joining piece and the female joining piece extend along the left-right direction and respectively drive the corresponding movable plates to move away from the rotating shaft with respect to the rotating block. The hinge according to claim 1, wherein the body of each rail connector has a first surface, a second surface opposite to the first surface, and an inner surface connecting the first surface and the second surface On the surface, the protruding strip is formed on the first surface, the receiving groove is recessed on the second surface and the inner surface, and the stop block is away from the inner surface and flush with the second surface. The hinge according to claim 2, wherein each rail connecting member further has a top plate connected to the main body and an outer plate connected to the top plate and spaced apart from the main body, and the width of the outer plate in the left-right direction is along The up and down direction gradually decreases from top to bottom. The hinge according to claim 2, wherein the male joint of each rail bracket unit has a joint protruding strip extending toward the rail joints, and the joint protruding strip can be movably accommodated adjacent to the male joint The receiving groove of the rail connecting piece of the connecting piece, the female connecting piece of each rail support unit has an engaging receiving groove for movably receiving the protruding strip of the track connecting piece adjacent to the female connecting piece. The hinge according to claim 4, wherein the protruding strips of the male coupling member and the protruding strips of the rail connectors are arc-shaped, and the coupling receiving groove of the female coupling member and the rails The accommodating grooves of the connecting member respectively correspond to the protruding strips and the joint protruding strips are in an arc shape. The hinge according to claim 1, wherein the base unit further includes two limit fixing members respectively provided at the front and rear ends of the base, and each limit fixing member is fixedly connected to one of the corresponding rail bracket units The track connecting member has two limit posts extending away from the rotating shaft unit, the base plate of each movable frame unit has two rotating grooves for movably receiving the corresponding limit posts, and the rotating groove has a first One end and a second end opposite to the first end. When the rail connectors are in the first position, the limit posts are located at the first ends of the rotating grooves. When the rail connectors are When moving from the first position to the second position, the base plates pivot relative to the base so that the limiting posts are respectively located at the second ends of the rotating grooves. The hinge according to claim 1, wherein each linkage unit includes a linkage seat provided on the base, a first gear member rotatably provided on the linkage seat extending along the left-right direction, and two respective The second gear pieces meshing with the two ends of the first gear piece, the two ends of the first gear piece are bevel gear heads, and each second gear piece has a first shaft portion for the corresponding rotating block to be fixedly sleeved and A gear part connected with the first shaft part and meshed with the first gear member, and the gear part is a bevel gear head. The hinge according to claim 1, wherein each shaft unit further includes two abutment seats spaced apart from each other for the pivoting shafts to movably pass through, and two ends respectively abut against the elasticity of the pivoting seats of the abutment seats And two pairs of abutment members respectively fixedly sleeved on the rotating shafts and matched with the abutment seat, each abutment seat has two abutment rings corresponding to the abutment members, and each abutment ring faces A plurality of first protrusions and first recesses defined by the first protrusions are formed on the surface of the locking member, and a plurality of second protrusions are formed on the surface of each locking member facing the locking ring. The second recesses defined by the second protrusions are capable of changing between a first state and a second state as the rotating shafts rotate. In the first state, the cards The second protrusions of the abutting members are accommodated in the first recesses of the abutting rings, and the second notches of the abutting members correspondingly accommodate the first protrusions of the abutting rings. In the second state, The second protrusions of the abutting members abut against the first protrusions of the abutting rings, so that the rotating shaft elastic member is compressed. The hinge according to claim 8, wherein each shaft includes a first penetration section fixedly passing through the corresponding rotating block, and a stopper connected to the first penetration section and held against the rotating block. A stop disc section and a second penetration section connected to the stop disc section for the card abutment seats, the rotating shaft elastic parts and the card abutment parts to be sheathed. The hinge according to claim 1, wherein a side edge of the rotating block of each movable frame unit is recessed to form a locking groove, and each movable frame unit further includes two hinges respectively disposed on the movable plate and abutting against the rotation The locking mechanism of the block, each locking mechanism has a housing, a locking member movably arranged on the housing and abutting against the side edge of the rotating block, and a locking elastic member whose two ends respectively abut against the housing and the locking member, When the rail connectors are in the first position, the locking member abuts against the side edge of the rotating block and the locking elastic member is compressed. When the rail connectors move to the second position, the locking member is affected by the The elastic force of the locking elastic member pushes and enters the locking groove.

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