TWM651558U - hinge - Google Patents

Abstract

A hinge includes a fixed base, two rotating units, and two side support plates. The fixed seat has two arc-shaped first channels located on both sides of a center line. The two rotating units are located on the fixed base on both sides of the center line and are respectively provided for the two housings. The two rotating units can be switched between an unfolded state and a folded state. Each rotation unit includes a connecting rod, a track sliding part, a rotating bracket and an intermediary sliding part. The intermediary sliding member is between the track sliding member and the rotating bracket, so that the track sliding member can be maintained without the need to lengthen (extend) the oblique slide rail of the track sliding member and the oblique slide rail of the rotating bracket. The sliding stability between the hinge and the rotating bracket is stable, so the design of the track slider and the rotating bracket in the present invention can jointly reduce the size of the entire hinge and make the whole hinge thinner.

Description

hinge

The present invention relates to a hinge, in particular to a hinge that is used to connect between two housings and is suitable for supporting a flexible screen.

There is an existing hinge that is suitable for connecting two housings so that the two housings can be opened and closed relative to each other. The hinge includes a fixed base and two rotating units. Each rotation unit includes a connecting rod member that can slide relative to the fixed base in an arc-shaped trajectory and is disposed on the fixed base, and a track slider that can slide in an arc-shaped trajectory relative to the connecting rod member. , and a rotating bracket pivotably provided on the fixed base. The track slide block and the rotating bracket are slidably connected through an inclined slide rail. However, in order to increase the sliding stability between the track slider and the rotating bracket, it is necessary to maintain a certain amount of contact between the track slider and the rotating bracket during the relative sliding process, and the size of the inclined slide rail needs to be lengthened. , however, since the oblique slide rail increases in size in the width direction and thickness direction and extends diagonally, the width and thickness of the track slider and the rotating bracket are relatively increased, which in turn increases the size of the entire hinge laterally and longitudinally. The hinge becomes larger and thicker, causing the overall volume of the hinge to be extremely large and difficult to reduce, making it impossible to achieve thinning.

Therefore, an object of the present invention is to provide a hinge that can improve at least one problem in the prior art.

Therefore, in some embodiments, the new hinge is suitable for connecting two housings so that the housings can be opened and closed relative to each other. The hinge includes a fixed base, two rotating units and two side support plates. The fixed seat has two opposite long sides and two arc-shaped first grooves located on both sides of a center line of the two long sides. The two rotating units are located on both sides of the centerline and are respectively provided on the fixed seat corresponding to the two first channels, and can be relatively switched between an unfolded state and a folded state. Each of the rotating units includes a connecting rod, A track sliding part, a rotating bracket, and an intermediate sliding part. The connecting rod has a body, a first arc-shaped slide rail connected to the body and slidably disposed in the corresponding first channel, and a second arc-shaped slide rail connected to the body and extending in a direction away from the fixed seat. The main body has a bearing surface. The track slider is used to connect one of the housings, and has a block, a second arc-shaped channel formed in the block and matched with the second arc-shaped slide rail, and formed in the block. An outer oblique sliding part, the block has a supporting surface for the corresponding housing. The rotating bracket is pivotably mounted on the fixed base and has a frame body and an inner oblique guide portion formed on the frame body. The inner oblique guide portion has an inner oblique slide block, forming An inner limiting rail on the inner inclined slide block, and a first guide slope formed on the end of the inner inclined slide block and adjacent to the inner limiting rail. The intermediary slider is provided between the track slider and the rotating bracket. The intermediary slider has an inner oblique sliding part that matches the inner oblique guide part, and an outer oblique sliding part that matches An outer oblique guide part, the inner oblique sliding part has an inner oblique slide rail matching the inner oblique slide block, adjacent to the inner oblique slide rail and slidably limited to the inner limit An inner limit block in the position rail, and a second guide slope formed on the inner limit block. The first guide slope of the rotating bracket is used to cooperate with the second guide slope to guide The inner limiting block is introduced into and limited to the inner limiting rail. The track slider slides relative to the second arc-shaped slide rail of the connecting rod member during the transition from the unfolded state to the folded state, and slides relative to the rotating bracket through the intermediary slider to relative to the fixed seat. Turn. The two side support plates are respectively arranged on the bearing surfaces of the connecting rods of the two rotating units and are linked with the two connecting rods. In the unfolded state, the support plates on both sides cover the fixed seat together; in the folded state, the support plates on both sides face each other and the distance between the support plates on both sides is wider on the side closer to the fixed seat. The side away from the fixed seat is narrower, and the supporting surfaces of the two track sliding parts are parallel and opposite.

In some embodiments, the inner oblique sliding part further has a cantilever connected between the inner limiting block and the inner wall defining the inner oblique slide rail.

In some embodiments, the outer oblique guide portion of the intermediate sliding member has an outer oblique sliding block, and the outer oblique sliding portion of the track slider has an outer oblique sliding block that matches the outer oblique sliding block. External diagonal slide.

In some implementations, the inner oblique slide rail of the intermediate slider is formed on the outer oblique slider.

In some embodiments, the outer oblique guide portion of the intermediary slider also has an outer limiting rail formed on the outer oblique slider, and the outer oblique sliding portion of the track slider also has an automatic An inner wall surface defining the outer oblique slide rail protrudes and is slidably limited to an outer limiting block on the outer limiting rail.

In some implementations, the outer limiting block is composed of a tail portion of a bolt.

In some implementations, the outer limiting block is composed of a tail portion of a rivet.

In some embodiments, the hinge further includes a synchronization mechanism connected between the rotation brackets of the rotation units, and the rotation bracket of each rotation unit also has a tooth portion formed on the frame body, The synchronization mechanism includes a plurality of gears meshed between the teeth of the rotating brackets.

In the present invention, by using the intermediary sliding member disposed between the track sliding member and the rotating bracket, there is no need to add (extend) the oblique slide rail (the outer oblique sliding part) of the track sliding member and the Under the premise of the oblique slide rail (the inner oblique guide part) of the rotating bracket, the sliding stability between the track slider and the rotating bracket can be maintained. Therefore, the design of the track slider and the rotating bracket It can also make the size of the entire hinge smaller (reduced), making the entire hinge thinner. In addition, by cooperating with the inner limiting rail of the inner oblique guide part of the rotating bracket and the inner limit block of the inner oblique sliding part of the intermediary sliding part, the intermediary sliding part and the intermediary sliding part can be restricted. The relative position between the rotating brackets prevents the intermediary sliding member and the rotating bracket from being separated from each other. Furthermore, through the cooperation between the first guide slope of the rotating bracket and the second guide slope of the intermediary slider, the inner limit block can be guided to enter and be limited to the inner limit rail, This makes the assembly between the inner oblique sliding part of the intermediary sliding part and the inner oblique guide part of the rotating bracket easier and more convenient.

Referring to FIGS. 1 to 4 , an embodiment of the new hinge 100 is suitable for connecting two housings 200 so that the two housings 200 can be opened and closed relative to each other, and is used to support a flexible screen 300 . The hinge 100 includes a fixed base 1 , four rotating units 2 , two side support plates 3 , a central support plate 4 , and two synchronization mechanisms 5 .

The fixed base 1 includes a fixed bracket 11, a shell (not shown) provided on the fixed bracket 11 from below, and two track brackets 12 fixed on the fixed bracket 11 from above. The fixed bracket 11 has two opposite long sides 111 and two guide structures 112 . A center line C is defined between the two long sides 111 , the center line C is parallel to the two long sides 111 and is located at the center of the two long sides 111 . The two guide structures 112 are arranged along the center line C. Each guide structure 112 has an upper wall 112a defining a guide hole 112b, and a surrounding wall 112c extending downward from the periphery of the upper wall 112a. The upper wall 112a and the surrounding wall 112c jointly define an accommodation space 112d connected to the guide hole 112b. The two rail brackets 12 are spaced apart along the extension direction of the two long sides 111 . Each rail bracket 12 is formed with two arc-shaped first channels 121 located on both sides of the center line C.

The four rotating units 2 are paired in pairs, and the two pairs of rotating units 2 are respectively installed on the two track brackets 12 of the fixed base 1 . The following is an explanation of a pair of rotating units 2 and a corresponding one of the track brackets 12 . The two rotating units 2 are located on both sides of the center line C and respectively correspond to the two first channels 121 and are provided on the fixed base 1 . The track brackets 12 are respectively provided for the two housings 200, and the two rotating units 2 can be relatively switched between an unfolded state (as shown in Figure 1) and a folded state (as shown in Figure 8). Each rotating unit 2 includes a connecting rod 21 , a track sliding part 22 , a rotating bracket 23 and an intermediary sliding part 24 .

Referring to Figures 3 and 5 to 7, the connecting rod 21 has a body 211, a first arc-shaped slide rail 212 connected to the body 211 and slidably disposed in the corresponding first channel 121, and The body 211 has a second arc-shaped slide rail 213 extending away from the fixed base 1 . The body 211 has a bearing surface 211a.

The track slider 22 has a block 221, an arc-shaped second channel 222 formed in the block 221 and matched with the second arc-shaped slide rail 213, and an outer inclined channel formed in the block 221. to the sliding part 223. The block 221 has a supporting surface 221a provided for the corresponding housing 200 . The outer oblique sliding part 223 of the track slider 22 has an outer oblique slide rail 223a that is in the shape of a concave channel and is inclined relative to the support surface 221a, and a self-defining outer oblique slide rail 223a. An outer limiting block 223b protrudes from the inner wall surface. In this embodiment, the outer limiting block 223b is composed of a tail portion of a rivet 25 (bolt) provided on the track slider 22. The rivet 25 is inserted into the track slider 22 from the outside, but in other cases In an embodiment, the outer limiting block 223b can also be integrally formed on the track slider 22 .

The rotating bracket 23 is pivotably mounted on the fixed base 1 . The rotating bracket 23 has a frame body 231 , an inner oblique guide portion 232 formed on the frame body 231 , and a tooth portion 233 formed on the frame body 231 . The frame body 231 has a pivot shaft 231 a pivotably provided on the track bracket 12 of the fixed base 1 . The inner oblique guide part 232 has an inner oblique slide block 232a, an inner limiting rail 232b formed on the inner oblique slide block 232a, and an inner limit rail 232b formed on the end of the inner oblique slide block 232a and adjacent to the inner limit. A first guide slope 232c of the position rail 232b. The pivot 231a is pivoted on the fixed base 1 so that the rotating bracket 23 can rotate about the pivot 231a.

The intermediate sliding part 24 is disposed between the track sliding part 22 and the rotating bracket 23 . The intermediary sliding member 24 has an inner oblique sliding part 241 matching the inner oblique guiding part 232, and an outer oblique guiding part 242 matching the outer oblique sliding part 223. The inner oblique sliding part 241 has an inner oblique slide rail 241a that matches the inner oblique slide block 232a, and is adjacent to the inner oblique slide rail 241a and slidably limited in the inner limiting rail 232b. An inner limiting block 241b, a cantilever 241c connected between the inner limiting block 241b and the inner wall defining the inner inclined slide rail 241a, and a second guide slope formed on the inner limiting block 241b 241d. The first guide slope 232c of the rotating bracket 23 is used to cooperate with the second guide slope 241d to guide the inner limiting block 241b to enter and limit the inner limiting rail 232b.

Through the cooperation of the inner limiting rail 232b of the inner oblique guide part 232 of the rotating bracket 23 and the inner limiting block 241b of the inner oblique sliding part 241 of the intermediary slider 24, the intermediary can be limited. The relative position between the sliding part 24 and the rotating bracket 23 prevents the intermediary sliding part 24 and the rotating bracket 23 from being separated from each other. Furthermore, through the cooperation between the first guide slope 232c of the rotating bracket 23 and the second guide slope 241d of the intermediary sliding member 24, the inner limiting block 241b can be guided to enter and be limited to the The inner limiting rail 232b makes the assembly between the inner oblique sliding part 241 of the intermediary slider 24 and the inner oblique guide part 232 of the rotating bracket 23 easier and more convenient. In addition, the elastic deformation of the cantilever 241c during the assembly process can also make it easier for the inner limiting block 241b to enter the inner limiting rail 232b.

The outer oblique guide part 242 has an outer oblique slide block 242a that matches the outer oblique slide rail 223a of the track slider 22, and an outer limiting rail formed on the outer oblique slide block 242a. 242b. The outer limiting block 223b of the track slider 22 is slidably limited to the outer limiting rail 242b. Through the cooperation of the outer limiting block 223b of the outer oblique sliding part 223 of the track slider 22 and the outer limiting rail 242b of the outer oblique guide part 242 of the intermediary sliding part 24, the The relative position between the track slider 22 and the intermediary slider 24 forms a limit to prevent the track slider 22 and the intermediary slider 24 from being separated from each other. Moreover, since the rivet 25 of the outer limiting block 223b is inserted into the track slider 22 from the outside, the outer oblique sliding portion 223 of the track slider 22 can be connected to the intermediary slider 24 The assembly between the outer oblique guide portions 242 is easier and more convenient.

In addition, the inner oblique slide rail 241a of the intermediary slider 24 is a channel structure formed on the outer oblique slide block 242a. Therefore, specifically in the unfolded state, the intermediate sliding member 24 covers at least a partial portion of the rotating bracket 23, and the track sliding member 22 covers at least a partial portion of the intermediate sliding member 24 together with the outer portion. At least part of the bracket 23 is rotated.

With the intermediary sliding member 24 disposed between the track sliding member 22 and the rotating bracket 23, there is no need to lengthen the oblique slide rail (the outer oblique sliding portion 223) of the orbital sliding member 22 and the rotating bracket. 23 of the inclined slide rail (the inner inclined guide part 232), the sliding stability between the track slider 22 and the rotating bracket 23 can be maintained.

The track slider 22 slides relative to the second arc-shaped slide rail 213 of the connecting rod 21 during the transition from the unfolded state to the folded state, and slides relative to the rotating bracket 23 through the intermediary slider 24, so as to Rotate relative to the fixed base 1.

Referring back to FIGS. 1 to 4 , the support plates 3 on both sides are respectively disposed on the bearing surfaces 211 a of the connecting rods 21 of the two rotating units 2 and are linked with the two connecting rods 21 . In this embodiment, the supporting plates 3 on both sides The support plate 3 is provided on the two sets of rotating units 2 at the same time. Each side support plate 3 has a first plate body 31 , an escape recess 32 formed on an inner edge 311 of the first plate body 31 , and a plurality of recessed portions 32 extending from the first plate body 31 toward the escape recess 32 . Lift column 33.

The central support plate 4 is movably arranged on the fixed base 1 . The central support plate 4 has a second plate body 41 and two guide posts 42 connected to the second plate body 41 and slidably inserted into the guide holes 112b of the two guide structures 112 respectively. Each guide post 42 is downwardly and slidably inserted through the guide hole 112b of the corresponding guide structure 112, and is provided with a fixing member (not shown) in the form of a screw lock, for example. The head of the fixing member is A spring member (not shown) is sandwiched between the guide structure 112 and the upper wall 112a. The spring member is used to push the head of the fixing member downward to drive the central support plate 4 relative to the fixing member. The bracket 11 moves downward.

Referring to Figures 2, 4, 5 and 7, in the unfolded state, the inner edges 311 of the two side support plates 3 are adjacent to each other, and the central support plate 4 is located to fill the avoidance recess 32 of the two side support plates 3. In a filling position, the two side support plates 3 and the central support plate 4 jointly cover the fixed seat 1 . In addition, in this state, the support surfaces 221a of the track sliders 22 are parallel to the load-bearing surfaces 211a of the connecting rods 21, and the two shells 200 provided on the support surfaces 221a of the track sliders 22 are in contact with the support surfaces 221a of the track sliders 22. The support plates 3 on both sides of the bearing surface 211a of the connecting rods 21 also support the flexible screen 300 at the same height. Moreover, in the unfolded state, the lifting columns 33 of the two side support plates 3 support the central support plate 4 upward to maintain the height of the central support plate 4 and the two side support plates 3 to the same height. The central support plate 4 can cooperatively support the flexible screen 300 .

Referring to Figures 8 to 11, in the folded state, the side support plates 3 are opposite to each other and the distance between the two side support plates 3 is at each inner edge 311 (the side close to the fixed base 1) The distance between the two side support plates 3 is narrower away from the inner edges 311 (the side away from the fixed base 1). The central support plate 4 is located relatively biased toward the fixed base 1. A biased position. The flexible circuit board (not shown) or other components (not shown) disposed between the two housings 200 can be avoided in this state by the avoidance recesses 32 at the inner edges 311 of the two side support plates 3. Prevent the flexible circuit board or other components from being pulled and damaged. And in the folded state, the support surfaces 221a of the rail sliders 22 are parallel to each other. Specifically, the side support plates 3 move together with the connecting rods 21, and the plates of the side support plates 3 Each surface is parallel to the load-bearing surface 211a of the connected connecting rod 21.

Specifically, when each rotating unit 2 is transitioning from the unfolded state to the folded state, the first arc-shaped slide rail 212 of the connecting rod 21 slides along the corresponding first channel 121 . In the folded state, the distance between the load-bearing surfaces 211a of the connecting rods 21 is wider on the side closer to the fixed base 1 and narrower on the side farther away from the fixed base 1, so that the distance between the load-bearing surfaces 211a of the connecting rods 21 is wider. The distance between the bearing surfaces 211a is narrow at the top and wide at the bottom. At the same time, the distance between the support plates 3 on both sides is also narrow at the top and wide at the bottom. Therefore, the distance between the support plates 3 on both sides is opposite to each other at the inner edges 311. wider. In addition, the central support plate 4 , which is supported by the lifting columns 33 of the two side support plates 3 , is driven by the spring member and moves downward to the biased position toward the fixed base 1 . The space between the support plates 3 on both sides and the central support plate 4 can accommodate the bend of the flexible screen 300 which is generally in the shape of a water drop. It should be noted that during the process of switching from the folded state to the unfolded state, the central support plate 4 is moved from the biased position toward the lifting columns 33 (see Figure 4) of the two side support plates 3. After that, the central support plate 4 is supported by the lifting columns 33 to maintain the filling position.

Referring to Figure 3, Figure 8 and Figure 9, during the process of converting each rotating unit 2 from the unfolded state to the folded state, the track slider 22 slides relative to the second arc-shaped slide rail 213 and slides through the intermediary The member 24 slides relative to the rotating bracket 23 to rotate relative to the fixed base 1 . By coordinating the arc sliding and oblique sliding of the rail sliding member 22, when the rail sliding member 22 is in the folded state, the supporting surface 221a can be parallel to the supporting surface 221a of the other rail sliding member 22. Oppositely, the housings 200 are stacked in parallel.

Referring again to Figures 2 and 3, in this embodiment, the two synchronization mechanisms 5 are respectively provided on the two track brackets 12 of the fixed base 1 and respectively correspond to the two sets of rotating units 2. Each of the synchronization mechanisms 5 is connected to between the rotation brackets 23 of the rotation units 2 of the corresponding group of rotation units 2 . The synchronization mechanism 5 includes a plurality of gears 51 (specifically, an even number of gears 51 ) meshed between the teeth 233 of the rotating brackets 23 , and a torque unit 52 connected to two gears 51 of the gears 51 . The two synchronization mechanisms 5 enable the rotation units 2 to rotate synchronously and provide torque.

To sum up, the present invention eliminates the need to add (extend) the oblique slide rail (extended) of the track slider 22 by using the intermediary slider 24 disposed between the track slider 22 and the rotating bracket 23 . Under the premise of the outer oblique sliding part 223) and the oblique slide rail (the inner oblique guide part 232) of the rotating bracket 23, the sliding stability between the track slider 22 and the rotating bracket 23 can be maintained. Therefore, the design of the track slider 22 and the rotating bracket 23 can jointly make the size of the entire hinge 100 smaller (reduced), making the entire hinge 100 thinner. In addition, through the cooperation of the inner limiting rail 232b of the inner oblique guide portion 232 of the rotating bracket 23 and the inner limiting block 241b of the inner oblique sliding portion 241 of the intermediary slider 24, it can be limited. The relative position between the intermediate sliding part 24 and the rotating bracket 23 prevents the intermediate sliding part 24 and the rotating bracket 23 from being separated from each other. Furthermore, through the cooperation between the first guide slope 232c of the rotating bracket 23 and the second guide slope 241d of the intermediary sliding member 24, the inner limiting block 241b can be guided to enter and be limited to the The inner limiting rail 232b makes the assembly between the inner oblique sliding part 241 of the intermediary slider 24 and the inner oblique guide part 232 of the rotating bracket 23 easier and more convenient.

However, the above are only examples of the present invention, and should not be used to limit the scope of the present invention. All simple equivalent changes and modifications made based on the patent scope of the present invention and the content of the patent specification are still within the scope of the present invention. Within the scope covered by this new patent.

100:hinge 1: Fixed seat 11: Fixed bracket 111: Long side 112: Guidance structure 112a:Upper wall 112b: Guide hole 112c: surround wall 112d: Accommodation space 12:Track bracket 121:The first channel 2: Rotating unit 21: Connecting rods 211:Ontology 211a: Bearing surface 212: First arc slide rail 213: Second arc slide rail 22:Track sliding parts 221:Block 221a: Support surface 222:Second channel 223:Outer oblique sliding part 223a:Outer oblique slide rail 223b:Outer limit block 23: Rotating stand 231: Frame 231a: Pivot 232:Inward oblique guide part 232a:Inner oblique slider 232b:Inner limit rail 232c: First guide slope 233:Tooth 24: Intermediary sliding parts 241:Inner oblique sliding part 241a:Inner oblique slide rail 241b:Inner limit block 241c: Cantilever 241d: Second guide slope 242: External oblique guide part 242a:Outer oblique slider 242b:Outer limit rail 25:Rivets 3: Side support plate 31:First plate body 311: medial edge 32: Avoid concave parts 33: Lifting column 4:Central support plate 41:Second plate body 42:Guide post 5: Synchronization mechanism 51:Gear 52: Torque unit 200: Shell 300:Flexible screen C: Center line

Other features and functions of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 is a perspective view of an embodiment of the new hinge in an unfolded state; Figure 2 is an exploded perspective view of the embodiment in Figure 1; Figure 3 is a further perspective exploded view of the embodiment in Figure 1, in which the two side support plates and a central support plate are not shown; Figure 4 is a cross-sectional view taken along the IV-IV section line in Figure 1; Figure 5 is a perspective view of a track bracket and one of the rotating units in an unfolded state in this embodiment; Figure 6 is an exploded perspective view of the track bracket and the rotating unit in Figure 5; Figure 7 is a cross-sectional view of the track bracket and the rotating unit in Figure 5; Figure 8 is a perspective view of the embodiment in a folded state; Figure 9 is a cross-sectional view taken along the IX-IX section line in Figure 8 Figure 10 is a perspective view of the track bracket and the rotating unit in a collapsed state in this embodiment; FIG. 11 is a cross-sectional view of the track bracket and the rotating unit in FIG. 10 .

1: Fixed seat

12:Track bracket

121:The first channel

2: Rotating unit

21: Connecting rods

211:Ontology

211a: Bearing surface

212: First arc slide rail

213: Second arc slide rail

22:Track sliding parts

221:Block

221a: Support surface

222:Second channel

223:Outer oblique sliding part

223a:Outer oblique slide rail

223b:Outer limit block

23: Rotating stand

231: Frame

231a: Pivot

232:Inward oblique guide part

232a:Inner oblique slider

232b:Inner limit rail

232c: First guide slope

233:Tooth

24: Intermediary sliding parts

241a:Inner oblique slide rail

241b:Inner limit block

241c: Cantilever

241d: Second guide slope

242: External oblique guide part

242a:Outer oblique slider

242b:Outer limit rail

25:Rivets

Claims (8)

A hinge suitable for connecting two housings so that the housings can be opened and closed relative to each other. The hinge includes: A fixed base having two opposite long sides and two arc-shaped first grooves located on both sides of a centerline of the two long sides; and Two rotating units are located on both sides of the center line and respectively corresponding to the two first channels and are provided on the fixed seat, and can be relatively switched between an unfolded state and a folded state. Each of the rotating units includes A connecting rod has a body, a first arc-shaped slide rail connected to the body and slidably disposed in the corresponding first channel, and a second arc-shaped slide rail connected to the body and extending in a direction away from the fixed seat. Arc slide rail, the body has a bearing surface, A track slider is used to connect one of the housings and has a block, a second arc-shaped channel formed in the block and matched with the second arc-shaped slide rail, and formed in the block. An outer oblique sliding part of the body, the block has a supporting surface for the corresponding housing, A rotating bracket is pivotably mounted on the fixed base and has a frame body and an inner oblique guide portion formed on the frame body. The inner oblique guide portion has an inner oblique slide block, an inner limiting rail formed on the inner inclined slide block, and a first guide slope formed on the end of the inner inclined sliding block and adjacent to the inner limiting rail, An intermediary sliding member is provided between the track sliding member and the rotating bracket. The intermediary sliding member has an inner oblique sliding part matching the inner oblique guiding part, and an inner oblique sliding part matching the outer oblique sliding part. A matching outer oblique guide part, the inner oblique sliding part has an inner oblique slide rail matching the inner oblique slide block, adjacent to the inner oblique slide rail and slidably limited to the inner oblique slide rail. An inner limit block in the limit rail, and a second guide slope formed on the inner limit block, the first guide slope of the rotating bracket is used to cooperate with the second guide slope, so as to Guide the inner limit block to enter and be limited to the inner limit rail, The track slider slides relative to the second arc-shaped slide rail of the connecting rod member during the transition from the unfolded state to the folded state, and slides relative to the rotating bracket through the intermediary slider to relative to the fixed seat. rotate; and Two side support plates are respectively provided on the bearing surfaces of the connecting rods of the two rotating units and are linked with the two connecting rods, In the unfolded state, the support plates on both sides cover the fixed seat together; in the folded state, the support plates on both sides face each other and the distance between the support plates on both sides is wider on the side closer to the fixed seat. The side away from the fixed seat is narrower, and the supporting surfaces of the two track sliding parts are parallel and opposite. The hinge of claim 1, wherein the inner oblique sliding part further has a cantilever connected between the inner limiting block and the inner wall defining the inner oblique slide rail. The hinge of claim 1, wherein the outer oblique guide portion of the intermediate sliding member has an outer oblique slider, and the outer oblique sliding portion of the track slider has an outer oblique slider. A matching outer oblique slide rail. The hinge of claim 3, wherein the inner oblique slide rail of the intermediate slider is formed on the outer oblique slide block. The hinge of claim 3, wherein the outer oblique guide portion of the intermediary slider also has an outer limiting rail formed on the outer oblique slider, and the outer oblique slider of the track slider The part also has an outer limiting block that protrudes from the inner wall surface of the outer oblique slide rail and is slidably limited to the outer limiting rail. The hinge according to claim 5, wherein the outer limiting block is composed of a tail portion of a bolt. The hinge according to claim 5, wherein the outer limiting block is composed of a tail portion of a rivet. The hinge of claim 1, wherein the hinge further includes a synchronization mechanism connected between the rotation brackets of the rotation units, and the rotation bracket of each rotation unit also has a synchronous mechanism formed on the frame body. A tooth portion, the synchronization mechanism includes a plurality of gears meshed between the tooth portions of the rotating brackets.

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