TWM633192U - Sequentially switch rotating biaxial hinges - Google Patents

Abstract

A double-axis hinge for sequentially switching rotation, comprising a bracket, a first shaft, a second shaft and a switch piece, the first shaft includes a first rod passing through the bracket and a The first cam that the rod rotates, the first cam forms a first notch, the second shaft includes a second rod that passes through the bracket and a second cam that rotates with the second rod, the first The two cams form a second notch, the switching piece is arranged on the bracket, and the switching piece forms a plurality of protruding lobes which are continuously arranged around the periphery of the switching piece, and these lobes are sequentially controlled by the first cam and the second cam. Pushing to make the switching piece rotate relative to the bracket in situ, at least one of the lobes contacts the first notch when the first cam is restricted to rotate, and contacts the second cam when the second cam is restricted to rotate. gap.

Description

Two-axis hinge that switches rotation sequentially

The present invention relates to a biaxial hinge, in particular to a biaxial hinge which switches and rotates sequentially.

Check, TW I490420 discloses a biaxial hinge, the biaxial hinge includes a first rotating shaft, a second rotating shaft and a connecting bracket, the first rotating shaft and the second rotating shaft are pivotally arranged on the connecting bracket side by side, the The connecting bracket has a rotating part, which is pushed when the first rotating shaft and the second rotating shaft rotate sequentially, and is inserted into a first groove of the first rotating shaft or a second groove of the second rotating shaft. When the groove is formed, the first rotating shaft and the second rotating shaft are restricted from continuing to rotate.

TW I490420 further discloses that the rotating member on the connecting bracket is elastically rotating, that is, the connecting bracket further includes a pair of torsion springs arranged on the rotating member, and the torsion spring stores elastic restoring force at the beginning, when the first When the first groove of the rotating shaft rotates to the vicinity of the rotating member, the torsion spring releases the elastic restoring force, and makes the rotating member push and turn into the first groove. Once the first rotating shaft rotates in the opposite direction, the second A rotating shaft causes the rotary member to press the torsion spring so that the torsion spring stores elastic recovery force again. However, the hinge disclosed by TW I490420 has a complex structure, and because the hinge itself already has a torsion force, when the user operates the hinge of TW I490420, the user must overcome the existing torsion force and additionally overcome the torsion spring. The elastic force causes TW I490420 to have the problem that is not conducive to operation.

In order to solve the above-mentioned problems, a biaxial hinge with a movable switching piece and a user-friendly operation has been developed in the hinge field, such as TW M584450, TW I763516, TW M625917, TW M625897, and TW M581358. During the implementation of this type of double-axis hinge, the switching piece is mainly driven by the rotating shaft, so that the switching piece is displaced on the bracket and restricts the other shaft. However, the aforementioned biaxial hinge is limited by the movable space of the switching piece. , which is not conducive to the miniaturization of the volume, thereby affecting the adoption of the implementation object.

The main purpose of the present invention is to solve the problem that the conventional hinge structure is implemented by a torsion spring, which is not conducive to the user's operation.

Another purpose of the present invention is to solve the problem that the conventional hinge is limited by the movable space of the switching piece, which is not conducive to the miniaturization of the hinge.

In order to achieve the above-mentioned purpose, the present invention provides a double-axis hinge that switches and rotates in sequence, including a bracket, a first shaft, a second shaft and a switching piece. Separated second through holes, and an assembly hole located between the first through holes and the second through holes. The first shaft includes a first shaft that penetrates into the first through hole and can rotate relative to the bracket, and a first cam that is arranged on the first shaft and rotates accordingly. The first cam forms a first gap. The second shaft is arranged horizontally to the first shaft, and the second shaft includes a second rod that penetrates the second through hole and can rotate relative to the bracket, and a rod that is arranged on the second rod and rotates with it. The second cam forms a second notch. The switching piece is arranged in the assembly hole, and the switching piece is formed into a plurality of protruding lobes which are continuously arranged around the periphery of the switching piece. These lobes are sequentially pushed by the first cam and the second cam, so that the switching piece is opposite The bracket rotates in situ, and at least one of the protrusions contacts the first notch when the first cam is restricted to rotate, and contacts the second notch when the second cam is restricted to rotate. The biaxial hinge has a first state in which the switching piece rotates in situ when the first cam or the second cam pushes at least one of the lobes, and one of the first cam and the second cam When the first cam and the second cam cannot continue to rotate, the switching piece is changed to a second state in which the other one of the first cam and the second cam is pushed.

In one embodiment, the switch piece has a continuous wave surface disposed along the periphery of the switch piece and used to form the convex lobes.

In one embodiment, the central angles corresponding to the lobes are equal.

In one embodiment, the switch piece is formed with an opening to the assembly hole, and the biaxial hinge includes a pin that passes through the opening and the assembly hole in sequence and restricts the switch piece to only rotate in situ.

In one embodiment, the diameter of the hole is larger than that of the assembling hole, and the pin includes a narrow diameter section extending into the assembling hole, and a wide diameter section continuing the narrow diameter section and extending into the opening.

In one embodiment, the first cam has a first arc surface in contact with the convex lobes, and two first planes respectively connecting two ends of the first arc surface and jointly forming the first notch, the second The cam has a second arc surface in contact with the protrusions, and two second planes respectively connecting two ends of the second arc surface and jointly forming the second notch.

In one embodiment, the first shaft includes a first auxiliary wheel that rotates with the first rod body and limits the rotation track of the first rod body on the bracket, and the second shaft includes a first auxiliary wheel that rotates with the second rod body The second auxiliary wheel rotates and limits the rotation track of the second rod on the bracket.

In one embodiment, the bracket forms two retaining walls respectively facing the first auxiliary wheel and the second auxiliary wheel and restricting the rotation of the first auxiliary wheel and the second auxiliary wheel.

In one embodiment, the bracket includes a base provided with the first through hole and the second through hole, and a boss formed on the base to form the assembly hole together with the base, the boss faces the One of the two retaining walls is formed on one side of the first auxiliary wheel and one side of the second auxiliary wheel respectively.

In one embodiment, the biaxial hinge has at least one connecting piece arranged on one side of the bracket and connecting the first shaft and the second shaft, and two connecting pieces arranged on one side of the bracket and respectively located between the first shaft and the second shaft. Torsion reed set on the second axis.

Through the aforementioned implementation of the new model, it has the following characteristics compared with the conventional ones: the new model forms the continuous convex lobes on the periphery through the switching piece, and the convex lobes are pushed when the first shaft and the second shaft rotate sequentially , so that the switching piece rotates relative to the bracket in situ, and when the first shaft and the second shaft are restricted from rotating, at least one of the protrusions contacts the first notch or the second notch, hereby, The present invention solves the problem that the conventional structure is unfavorable to the user's operation, and at the same time, the biaxial hinge has the characteristics of stable structure and small volume.

The detailed description and technical content of this new model are described as follows in conjunction with the drawings:

Please refer to FIG. 1 to FIG. 9 , the present invention provides a biaxial hinge 100 that switches and rotates in sequence, including a bracket 10 , a first shaft 20 , a second shaft 30 and a switching piece 40 . The bracket 10 forms a first through hole 11, a second through hole 12 and an assembly hole 13, the first through hole 11 and the second through hole 12 are separated, and the assembly hole 13 is located between the first through hole 11 and the second between 12 perforations. The first shaft 20 is arranged on the bracket 10, the first shaft 20 includes a first rod 21 and a first cam 22, the first rod 21 penetrates into the first through hole 11 and when pushed It can rotate relative to the bracket 10. The first cam 22 is arranged on the first rod body 21. The first cam 22 can be integrally formed directly from the first rod body 21, or can be sleeved on the first rod body 21 as an additional component. On a rod body 21 , the first cam 22 rotates when the first rod body 21 rotates, and a first notch 221 is formed on the first cam 22 .

On the support, the second shaft 30 is arranged on the support 10 and arranged horizontally to the first shaft 20. The second shaft 30 includes a second rod body 31 and a second cam 32, and the second rod body 31 penetrates into the The second through hole 12 is spaced from the first rod body 21, the second rod body 31 can rotate relative to the bracket 10 when pushed, the second cam 32 is arranged on the second rod body 31, the second rod body 31 The second cam 32 can be integrally formed from the second rod body 31 , or can be assembled on the second rod body 31 with additional components. The arrangement of the second cam 32 and the first cam 22 is not limited to be the same. The second cam 32 rotates when the second rod 31 rotates, and the second cam 32 forms a second notch 321 .

Bearing in mind, the switching piece 40 is located on the bracket 10 and is arranged in the assembly hole 13, the switching piece 40, the first shaft 20 and the second shaft 30 are arranged linearly on the bracket 10, the switching piece 40 A plurality of convex petals 41 are formed, and these convex petals 41 are arranged continuously around the periphery of the switching piece 40. At least one side of these convex petals 41 faces the first cam 22, and at least the other side of these convex petals 41 faces The second cam 32 . Moreover, the protrusions 41 are sequentially pushed by the first cam 22 and the second cam 32 when the biaxial hinge 100 is implemented, and contact the first cam 22 and the second cam 32 in sequence when being pushed. , wherein, when the convex petals 41 are pushed, the switching piece 40 is limited by the shape of the assembly hole 13, and will not deviate relative to the bracket 10, that is, the switching piece 40 does not change from the bracket 10 The upper position, but only rotate in situ relative to the bracket 10. In addition, when the first cam 22 is restricted from rotating, at least one of the protrusions 41 contacts the first notch 221, and when the second cam 32 is restricted from rotating, at least one of the protrusions 41 touches the first notch 221. contact the second notch 321 .

Further, the double-axis hinge 100 has a first state in which the first cam 22 or the second cam 32 pushes at least one of the protrusions 41, and a state in which the first cam 22 or the second The second state that the two cams 32 cannot continue to rotate. For detailed description, please refer to FIG. 5 to FIG. 9 , assuming that initially, the biaxial hinge 100 is not opened, the first shaft 20 is not restricted to rotate, and the second shaft 30 is restricted to rotate, so that the protrusions 41 One of them touches the second notch 321 . Moreover, when the biaxial hinge 100 is opened, the first rod body 21 rotates relative to the bracket 10, and the first cam 22 is driven by the first rod body 21 to push the protrusions 41. The shaft hinge 100 enters the first state, and the switching piece 40 is rotated in situ by the protrusions 41 . At the same time, during the rotation of the switch piece 40 , although the protrusions 41 contact the second cam 32 , the second cam 32 is restricted, so that the protrusions 41 cannot push the second cam 32 to rotate.

Bearing in mind, when the first shaft 20 continues to rotate until it cannot continue to rotate, the biaxial hinge 100 enters the second state, and at least one of the protrusions 41 contacts the first notch 221 . Afterwards, the biaxial hinge 100 changes the second rod body 31 to rotate relative to the bracket 10, and changes from the second state to the first state, the second rod body 31 rotates relative to the bracket 10, and pushes the At least one of the protrusions 41 is used to make the switch piece 40 rotate on the bracket 10 in situ. Moreover, during the rotation of the switching plate 40, although the protruding lobes 41 contact the first cam 22, the protruding lobes 41 cannot push the first cam 22 to rotate because the first cam 22 is restricted. Thereafter, the second shaft 30 continues to rotate relative to the bracket 10 until the second rod body 31 cannot continue to rotate, and the biaxial hinge 100 is fully opened.

Once the biaxial hinge 100 is about to close, the second shaft 30 is affected and rotates in the opposite direction relative to the bracket 10. At this time, the biaxial hinge 100 returns from the second state to the first state, making the switching piece 40 is rotated in situ by the action of the second cam 32 . When the second rod body 31 can no longer rotate relative to the bracket 10, the biaxial hinge 100 enters the second state instead, at least one of the protrusions 41 touches the second notch 321, and the switching piece 40 changes to the second state. The first cam 22 pushes. Afterwards, the protrusions 41 are sequentially pushed by the first cam 22 , and at the same time, the biaxial hinge 100 is in the first state, and the switching piece 40 rotates on the bracket 10 in situ. When the first rod 21 continues to rotate until it cannot rotate relative to the bracket 10 , the biaxial hinge 100 is completely closed.

It can be seen from the above that, when the switching piece 40 of the present invention is pushed by the first shaft 20 and the second shaft 30 , it only rotates on the bracket 10 without changing its position on the bracket 10 . At the same time, the switching piece 40 of the present invention is not implemented with a conventional torsion spring, which improves the problem that the user needs to overcome the force of the torsion spring when operating the conventional hinge, which is not conducive to the user's operation. In addition, the biaxial hinge 100 of the present invention has the characteristics of simple structure and can be reduced in size.

1 to 5 again, in one embodiment, the switching piece 40 has a continuous wave surface 42, the continuous wave surface 42 is arranged along the periphery of the switching piece 40, and is used to form the convex lobes 41 . Moreover, in this embodiment, the central angles 411 corresponding to the protrusions 41 are equal, so that the configurations of the protrusions 41 are the same.

In another embodiment, the switching piece 40 is formed with an opening 43, and the opening 43 is disposed facing the assembly hole 13. The biaxial hinge 100 further includes a pin 50, and the pin 50 is sequentially inserted during assembly. The opening 43 is connected with the assembling hole 13 and is used to restrict the switch piece 40 from rotating relative to the bracket 10 . Further, the diameter of the opening 43 is larger than the diameter of the assembly hole 13, the pin 50 is stably assembled in the assembly hole 13 and the opening 43, and the pin 50 includes a narrow diameter section 51 and a wide diameter section 52 , the narrow-diameter section 51 extends into the assembly hole 13 , and the wide-diameter section 52 continues the narrow-diameter section 51 and extends into the opening 43 .

On the other hand, referring to FIGS. 1 to 5 again, in one embodiment, the first cam 22 has a first arc surface 222 and two first flat surfaces 223, and the first arc surface 222 and the protrusions 41 At least one of them contacts, and when the first cam 22 rotates, the first arc surface 222 pushes at least one of the protrusions 41 . Moreover, the two first planes 223 connect the two ends of the first arc surface 222 , and the inclination directions of the two first planes 223 are different, so as to form the first notch 221 together. In addition, the second cam 32 has a second arc surface 322 and two second flat surfaces 323, the second arc surface 322 is in contact with at least one of the protrusions 41, when the second cam 32 rotates, the first The two arc surfaces 322 push at least one of the protrusions 41 . In addition, the two second planes 323 connect the two ends of the second arc surface 322 , and the inclination directions of the two second planes 323 are different to jointly form the second notch 321 .

Bearing in mind, in another embodiment, please refer to Fig. 10 to Fig. 12, the present invention is to limit the rotation of the first shaft 20, the first shaft 20 includes a first auxiliary wheel 23, and the first auxiliary wheel 23 is set On the first rod body 21 and adjacent to the first cam 22, the first auxiliary wheel 23 rotates with the first rod body 21, and the first auxiliary wheel 23 is stopped by the bracket 10 during rotation, However, the first rod body 21 cannot continue to rotate relative to the bracket 10 . In more detail, in one embodiment, the first auxiliary wheel 23 has a first arc-shaped working surface 231, two first limiting planes 232 respectively connected to the first arc-shaped working surface 231, and a joint connecting the two second A first engaging surface 233 that limits the flat surface 232 and is opposite to the first arc-shaped working surface 231 . The first arc-shaped working surface 231 does not interfere with the bracket 10 during the rotation of the first auxiliary wheel 23, and the two first limiting planes 232 are arranged parallel to the first auxiliary wheel 23. The two first limiting planes 232 interferes with the bracket 10 during the rotation of the first auxiliary wheel 23 , so that the two first limiting planes 232 restrict the first auxiliary wheel 23 to only rotate 180 degrees. In addition, the first engagement surface 233 interferes with the rotation of the first auxiliary wheel 23 , thereby limiting the rotation of the first rod body 21 . On the other hand, the present invention can also limit the rotation of the second shaft 30, the second shaft 30 includes a second auxiliary wheel 33, the second auxiliary wheel 33 is arranged on the second rod body 31 and is connected with the second The cam 32 is adjacent, and the second auxiliary wheel 33 rotates with the second rod body 31, and the second auxiliary wheel 33 is stopped by the bracket 10 during the rotation, so that the second rod body 31 cannot continue to be relative to the bracket 10 turns. In more detail, in one embodiment, the second auxiliary wheel 33 has a second arc-shaped working surface 331, two second limiting planes 332 respectively connected to the second arc-shaped working surface 331, and a second confining plane 332 connected to the two second arc-shaped working surfaces. Two second engaging surfaces 333 limit the plane 332 and are opposite to the second arc-shaped working surface 331 . The second arc-shaped working surface 331 does not interfere with the bracket 10 during the rotation of the second auxiliary wheel 33 , the two second limiting planes 332 are arranged on the second auxiliary wheel 33 , and the two second limiting planes 332 The second auxiliary wheel 33 interferes with the bracket 10 during rotation, so that the two second limiting planes 332 restrict the second auxiliary wheel 33 to only rotate 180 degrees. In addition, the second engagement surface 333 interferes with the bracket 10 during the rotation of the second auxiliary wheel 33 , thereby providing a restriction on the rotation of the second rod body 31 . In addition, the operating principle of the second auxiliary wheel 33 is the same as that of the first auxiliary wheel 23 , which is not shown in detail in the drawings herein.

As mentioned above, in one embodiment, the bracket 10 forms two retaining walls 14, the two retaining walls 14 are located on two opposite sides of the bracket 10, and face the first auxiliary wheel 23 and the second auxiliary wheel 33 respectively, One of the two retaining walls 14 is used to limit the rotation of the first auxiliary wheel 23 , and the other of the two retaining walls 14 is used to restrict the rotation of the second auxiliary wheel 33 . In more detail, when one of the two retaining walls 14 contacts the first arc-shaped working surface 231, it does not restrict the rotation of the first rod body 21, and when it contacts the two first limiting planes 232, it provides the first The rod body 21 limits. Similarly, when the other of the two retaining walls 14 contacts the second arc-shaped working surface 331, it does not restrict the rotation of the second rod body 31, and when it contacts the two second limiting planes 332, it provides the second rod body 31 limit.

On top of that, each of the two retaining walls 14 has a rotation-permitting section 141 and two rotation-limiting sections 142, and the two rotation-allowing sections 141 of the two retaining walls 14 are respectively used to contact the first arc-shaped work The surface 231 and the second arc-shaped working surface 331 are not limited to the first arc-shaped working surface 231 and the second arc-shaped working surface 331 . The two rotation limiting sections 142 are located at both ends of the rotation allowing section 141, the two rotation limiting sections 142 contact the two first limiting planes 232 or the two second limiting planes 332, and provide the two first arcs The working surface 231 and the second arc-shaped working surface 331 have a stop function.

As above, in one embodiment, the bracket 10 of the present invention includes a base 15 and a boss 16, the base 15 is provided with the first through hole 11 and the second through hole 12, and the boss 16 is arranged on the base 15 The boss 16 forms the assembly hole 13 together with the base 15, and the boss 16 forms the two retaining walls on the side facing the first auxiliary wheel 23 and the side facing the second auxiliary wheel 33 respectively. 14 of them.

On the other hand, in one embodiment, the present invention is to increase the torsion of the biaxial hinge 100. The biaxial hinge 100 has at least one connecting piece 60 and two torsion reed sets 70. The connecting piece 60 is arranged on one side of the bracket 10. And connect the first shaft 20 and the second shaft 30, the two torsion reed groups 70 are located on one side of the bracket 10 and face the connecting piece 60, the two torsion reed groups 70 are located on the first shaft 20 and the second shaft respectively. on the second axis 30 .

In summary, it is only a preferred embodiment of the present invention, and should not limit the scope of implementation of the present invention, that is, all equal changes and modifications made according to the patent scope of the present application should still belong to the present invention. patent coverage.

100: biaxial hinge 10: Bracket 11: First piercing 12: Second piercing 13: Assembly hole 14: retaining wall 141: Rotation allowed section 142: Rotation restriction section 15: base 16: Boss 20: first axis 21: The first rod body 22: First Cam 221: The first gap 222: The first arc surface 223: First plane 23: The first training wheel 231: The first curved working surface 232: The first limit plane 233: The first connecting surface 30: Second axis 31: Second rod body 32:Second cam 321: second gap 322: second arc surface 323: second plane 33: Second training wheel 331: Second curved working surface 332: Second limit plane 333: The second connecting surface 40:Switch film 41: convex lobe 411: Central angle 42: continuous wavy surface 43: opening 50: latch 51: narrow diameter section 52: wide diameter section 60: connecting piece 70:Torsion reed set

Fig. 1 is a three-dimensional structural schematic diagram of an embodiment of the present invention. Fig. 2 is an exploded schematic view (1) of an embodiment of the present invention. Fig. 3 is an exploded schematic diagram (2) of an embodiment of the present invention. Fig. 4 is a schematic front view of an embodiment of the present invention. Fig. 5 is a schematic side view of an embodiment of the present invention. Fig. 6 is a side view implementation schematic diagram (1) of an embodiment of the present invention. Fig. 7 is a side view implementation schematic diagram (2) of an embodiment of the present invention. Fig. 8 is a side view implementation schematic diagram (3) of an embodiment of the present invention. Fig. 9 is a side view implementation schematic diagram (4) of an embodiment of the present invention. Fig. 10 is a schematic cross-sectional view of line A-A in Fig. 4 of the present invention. Fig. 11 is a schematic diagram of the implementation of the cross-section of the A-A line segment in Fig. 4 of the present invention (1). Fig. 12 is a schematic diagram (two) of the implementation of the A-A line segment section in Fig. 4 of the present invention.

100: biaxial hinge

10: Bracket

15: base

16: Boss

20: first axis

22: First Cam

221: The first gap

23: The first training wheel

30: Second axis

32:Second cam

321: second gap

33: Second training wheel

40:Switch film

50: latch

60: connecting piece

70:Torsion reed set

Claims (10)

A two-axis hinge for sequentially switching rotations, comprising: a bracket forming a first through hole, a second through hole spaced from the first through hole, and an assembly hole between the first through hole and the second through hole; A first shaft includes a first rod body that penetrates the first through hole and can rotate relative to the bracket, and a first cam that is arranged on the first rod body and rotates accordingly. The first cam forms a first a gap; A second shaft is arranged horizontally to the first shaft, and the second shaft includes a second rod that penetrates the second through hole and can rotate relative to the bracket, and a second rod that is arranged on the second rod and rotates with the second shaft. a second cam forming a second notch; and A switching piece is arranged in the assembly hole, and the switching piece is formed into a plurality of convex lobes which are continuously arranged around the periphery of the switching piece, and the convex lobes are sequentially pushed by the first cam and the second cam, so that the switching piece Rotating in situ relative to the bracket, at least one of the lobes contacts the first notch when the first cam is restricted to rotate, and contacts the second notch when the second cam is restricted to rotate; Wherein, the biaxial hinge has a first state in which the switching piece rotates in situ when the first cam or the second cam pushes at least one of the lobes, and the first cam and the second cam When one of them cannot continue to rotate, the switching piece is changed to a second state pushed by the other of the first cam and the second cam. According to claim 1, the biaxial hinge is sequentially switched and rotated, wherein the switching piece has a continuous wave surface arranged along the periphery of the switching piece and used to form the convex lobes. As stated in Claim 2, the two-axis hinge that switches rotations in sequence, wherein the central angles corresponding to the convex lobes are equal. As described in any one of Claims 1 to 3, the biaxial hinge for sequentially switching and rotating, wherein the switching sheet is formed with an opening facing the assembly hole, and the biaxial hinge includes a sequentially inserted hole and The assembly hole is also limited to the latch that the switching piece can only rotate in situ. As described in claim 4, the biaxial hinge that switches rotations sequentially, wherein the aperture of the opening is larger than the assembly hole, and the pin includes a narrow-diameter section extending into the assembly hole, and a continuous narrow-diameter section and The wide diameter section extending into the opening. According to any one of claim items 1 to 3, the two-axis hinge for sequentially switching rotation, wherein, the first cam has a first arc surface in contact with the convex lobes, and two arc surfaces connected respectively end and jointly form the first plane of the first notch, the second cam has a second arc surface in contact with the lobes, and two respectively connect the two ends of the second arc surface and jointly form the second cam. The second plane of the gap. The dual-axis hinge for sequentially switching rotation as described in claim 6, wherein the first axis includes a first auxiliary wheel that rotates with the first rod body and limits the rotation track of the first rod body on the bracket, The second shaft includes a second auxiliary wheel that rotates with the second rod and limits the rotation track of the second rod on the bracket. As described in Claim 7, the two-axis hinge that switches rotations sequentially, wherein the bracket is formed into two faces that respectively face the first auxiliary wheel and the second auxiliary wheel and limit the rotation of the first auxiliary wheel and the second auxiliary wheel retaining wall. As described in Claim 8, the two-axis hinge that switches and rotates sequentially, wherein the bracket includes a base with the first through hole and the second through hole, and a base formed on the base together with the base to form the assembly The boss of the hole is formed one of the two retaining walls on the side facing the first auxiliary wheel and the side of the second auxiliary wheel respectively. A dual-axis hinge for sequentially switching rotation as described in any one of claims 1 to 3, wherein the dual-axis hinge has at least one connecting piece disposed on one side of the bracket and connecting the first shaft and the second shaft, And two sets of torsion reeds arranged on one side of the bracket and located on the first shaft and the second shaft respectively.

Images