TWM625897U - Switch-type dual-axis hinge and electronic device using the same - Google Patents

Abstract

A switch-type dual-axis hinge device and an electronic device using the same. The switch-type dual-axis hinge device includes a mounting assembly, a first rotating shaft and a second rotating shaft installed on the mounting assembly, and a first rotating shaft and a second rotating shaft arranged on the first rotating shaft and the second rotating shaft. A switching piece and a buffering elastic sheet between the two rotating shafts. The buffer shrapnel will have a buffering effect on the rotation of the first shaft and the second shaft, so it can reduce the problem of stuck feel when switching, and provide a smooth operation feel. The buffer shrapnel can also reduce the switching parts. The collision of the switching cam of the rotating shaft reduces abnormal noise and wear.

Description

Switch-type dual-axis hub and electronic device using the same

The new model relates to a double-shaft hinge device, especially a switch-type double-shaft connecting two bases of a flip-top electronic device, and can provide a smooth operating feeling during the relative opening and closing of the two bases hub.

Laptops, mobile phones, handheld game consoles and other flip-top electronic devices are common and portable electronic devices on the market today. The two bases can be pivoted and opened and closed relative to each other, and in order to effectively increase the relative expansion angle of the two bases, a double-axis hinge can be used, and the double-axis hinge generally has a first rotating shaft and a first rotating shaft. Two rotating shafts, the first rotating shaft and the second rotating shaft are respectively connected to the two bases.

In addition, one of the two-axis hinges is a synchronous rotation type, that is, the first rotating shaft and the second rotating shaft are connected through a gear set, and when the first rotating shaft is forced to rotate, it can synchronously drive the second rotating shaft to rotate together; the other The double-shaft hinge is a switch type. When the first shaft is forced to rotate, the second shaft will be locked and cannot be rotated. When the first shaft rotates to a predetermined angle, it will switch to the second shaft that can rotate and the first shaft to rotate. A state where it is locked and cannot be turned.

Wherein, when the prior art switch-type dual-shaft hinge is switched from the first rotating shaft to the second rotating shaft, the transmission plate originally used to lock the second rotating shaft will be pushed up by the second rotating shaft and move to abut against the first rotating shaft , so that the first shaft cannot be rotated. Similarly, when switching from the second shaft to the rotation of the first shaft, the first shaft pushes the driving piece to move against the second shaft. During the above switching process, the collision between the transmission plate and the first rotating shaft or the second rotating shaft will not only produce abnormal noise, but also wear at the collision place, which will affect the locking of the switching double-shaft hinge after long-term use. ,cut In addition, when the user flips the base body to switch the angle, it will also cause a stuck feel because the transmission plate is instantly unlocked.

As mentioned above, the switch-type dual-shaft hinge device of the prior art still needs to be further improved.

In view of the aforementioned problems in the prior art, the purpose of the invention is to provide a switchable biaxial hinge device and an electronic device using the same. The switchable biaxial hinge device can reduce the relative opening and closing process of the two bases of the electronic device. Abnormal noise and wear caused by the collision of components in the middle, thus providing a smooth operating feel.

In order to achieve the above-mentioned creative purpose, the technical means adopted by the present invention is to propose a switchable dual-axis hinge device, which includes: an installation component; There is a first switching cam and a first transmission cam; a second rotating shaft, which is arranged in parallel with the first rotating shaft, and is rotatably arranged on the installation assembly, and a second switching cam and a second rotating shaft are arranged on the second rotating shaft. A second transmission cam; a switching piece, which is arranged between the first switching cam and the second switching cam, and the switching member correspondingly switches and controls the first switching cam and the second switching cam according to the pivoting action of the first rotating shaft and the second rotating shaft The locking and pivoting modes of the switching cam; a buffer elastic piece is arranged between the first transmission cam and the second transmission cam, the two ends of the buffer elastic piece have a symmetrical first elastic arm and a second elastic arm, the buffer elastic piece According to the pivoting mode of the first rotating shaft and the second rotating shaft, the first elastic arm and the second elastic arm control the degree of elastic compression or elastic release of the first transmission cam and the second transmission cam correspondingly.

In the switch-type dual-axis hinge device: The first switching cam has a first switching stop end and a first switching free end; the second switching cam has a second switching stop end and a second switching free end; the switching member is switched to the first switching stop end , so as to control the locking of the first rotating shaft and the pivoting of the second rotating shaft; the switching member is switched to the second switching stop end to control the locking of the second rotating shaft and the pivoting of the first rotating shaft.

In the switch-type dual-shaft hinge device: the first transmission cam has a first transmission stop end and a first transmission free end; the second transmission cam has a second transmission stop end and a second transmission free end ; The buffer shrapnel controls the first elastic arm and the second elastic arm to press against the first transmission stop end and the first transmission free end of the first transmission cam according to the pivoting mode of the first rotating shaft and the second rotating shaft. The degree of elastic compression or elastic release between the second transmission stop end of the transmission cam and the second transmission free end.

In the above-mentioned switching double-shaft hinge device: the first switching cam and the first transmission cam are integrally formed on the first rotating shaft; the second switching cam and the second transmission cam are integrally formed on the second rotating shaft .

In the switch-type dual-axis hinge device, the installation component can have a through groove, and the switching element and the buffer elastic sheet are accommodated in the through groove.

The switch-type dual-axis hinge device further includes two torsion force generating modules, which are respectively sleeved and fixed on the first rotating shaft and the second rotating shaft. torque.

In the switch-type dual-axis hinge device, the mounting assembly includes a main support and an auxiliary support arranged at intervals, and the first rotating shaft and the second rotating shaft are parallel and rotatably penetrate through the main support and the auxiliary support, and the switching is performed. The component and the buffer elastic sheet are arranged on the main support, and the two torsion generating modules are located on one side adjacent to the auxiliary support and away from the main support.

In the switch-type dual-shaft hinge device, the combination of the first switching cam, the second switching cam and the switching element, and the combination of the first transmission cam, the second transmission cam and the buffer spring are selectively arranged on the main support. , between the auxiliary support and the two torque generating modules.

In the switch-type biaxial hinge device, each torsion generating module can include a plurality of disk-shaped elastic pads, a plurality of friction pads, a plurality of spacers and a fixing piece, and each spacer is located adjacent to each other. Between the two friction pads, the plurality of disc-shaped elastic pads and the fixing member are arranged at the end of the corresponding first rotating shaft or the second rotating shaft, and are far away from the installation component.

In order to achieve the aforementioned creative purpose, the technical means adopted in the present invention is to propose an electronic device, which includes a first base body, a second base body, and a switch-type dual-axis hinge device as described above, wherein the switch-type dual-axis The first rotating shaft of the hinge device is connected with the first base body, and the second rotating shaft is connected with the second base body.

The advantage of the present invention lies in that, in the process of switching from the rotation of the first shaft to the rotation of the second shaft, the two ends of the buffer shrapnel will have a buffering effect on the rotation of the first shaft and the second shaft, so the jamming during switching can be reduced. It solves the problem of tactile feel and provides a smooth operating feel. Furthermore, since the rotation of the first rotating shaft and the second rotating shaft is buffered, the collision of the switching element on the transmission cam portion of the first rotating shaft and the second rotating shaft can also be effectively reduced, so as to avoid abnormal noise and noise generated during the collision. wear effect.

1,1A: Switched double shaft hub

10: Install components

11,11A: Main support

111: Grooving

12,12A: Auxiliary support

21,21A: The first reel

211, 211A: Socket rod

212: Fixed part

213, 213A: First switching cam

2131: The first switching stop end

2132: First switch free end

215, 215A: First drive cam

2151: The first transmission stop end

2152: First drive free end

22,22A: The second shaft

221, 221A: Socket rod

222: Fixed part

223, 223A: Second switching cam

2231: The second switching stop end

2232: Second switch free end

225, 225A: Second drive cam

2251: Second transmission stop end

2252: Second drive free end

30,30A: Torque generation module

31,31A: Disc-shaped elastic gasket

32, 32A: Friction pads

33,33A: Fasteners

34, 34A: Spacer

41,41A: Switching piece

42,42A: Buffer shrapnel

421: First elastic arm

422: Second elastic arm

51: The first bracket

52: Second bracket

60: Electronics

61: The first body

62: Second seat

FIG. 1 is a schematic three-dimensional appearance diagram of a new type of electronic device.

FIG. 2 is an exploded perspective view of the first preferred embodiment of the new type of switching double-axis hinge device.

FIG. 3 is a side cross-sectional view of the first preferred embodiment of the novel switch-type biaxial hinge in a closed state.

FIG. 4 is another side cross-sectional view of the first preferred embodiment of the novel switch-type biaxial hinge in a closed state.

FIG. 5 is a side cross-sectional view of the first preferred embodiment of the novel switching type biaxial hinge at a predetermined switching angle.

FIG. 6 is another side cross-sectional view of the first preferred embodiment of the novel switching double-axis hinge at a predetermined switching angle.

FIG. 7 is a side cross-sectional view of the first preferred embodiment of the novel switch-type dual-axis hinge device unfolded by 180 degrees.

FIG. 8 is another side cross-sectional view of the first preferred embodiment of the novel switch-type dual-axis hinge device, which is unfolded by 180 degrees.

FIG. 9 is a three-dimensional external view of the second preferred embodiment of the new switchable biaxial hinge.

FIG. 10 is an exploded perspective view of the second preferred embodiment of the new switchable biaxial hinge.

FIG. 11 is a side view of the second preferred embodiment of the new type of switching double-axis hinge device.

FIG. 12 is a side cross-sectional view of the second preferred embodiment of the new switchable biaxial hinge in the unfolded state.

FIG. 13 is another side cross-sectional view of the second preferred embodiment of the new switchable biaxial hinge in the unfolded state.

The technical means adopted by the present invention to achieve the predetermined purpose of the new model are further described below in conjunction with the drawings and the preferred embodiments of the present invention.

Referring to FIG. 1 , it is an electronic device 60 provided with the switchable biaxial hinge 1 according to the first preferred embodiment of the present invention. The electronic device 60 includes a first base 61 , a second base 62 and two The two switchable biaxial hinges 1 are installed on the electronic device 60 symmetrically with each other. The hinge device 1 is relatively open and closed.

Further referring to FIG. 2 , the switchable biaxial hinge device 1 includes an installation assembly 10 , a first rotating shaft 21 , a second rotating shaft 22 , two torque generating modules 30 , a switching member 41 , a buffer spring 42 , a The first support frame 51 and a second support frame 52 are provided.

The mounting assembly 10 includes a main support 11 and an auxiliary support 12 arranged at intervals, and the mounting assembly 10 has a through slot 111 . In this embodiment, the through slot 111 is provided on the main support 11 .

Referring to FIG. 3 and FIG. 4 , the first rotating shaft 21 is rotatably disposed on the main support 11 and the auxiliary support 12 of the mounting assembly 10 , and the first rotating shaft 21 has a set of connecting rods 211 and a fixed The connecting portion 212, the first rotating shaft 21 is provided with a first switching cam 213 and a first transmission cam 215, and the sleeve portion 211 of the first rotating shaft 21 is formed at one end of the first rotating shaft 21, and is rotatably penetrated through the main shaft 212. The support 11 and the auxiliary support 12 , the fixing part 212 of the first rotating shaft 21 is formed on the other end of the first rotating shaft 21 , the first switching cam 213 and the first transmission cam 215 are arranged around the socket rod of the first rotating shaft 21 . Section 211 on. The first switching cam 213 has a first switching stop end 2131 and a first switching free end 2132 , and the first transmission cam 215 has a first transmission stop end 2151 and a first transmission free end 2152 .

The second rotating shaft 22 and the first rotating shaft 21 are arranged parallel to each other, and are rotatably disposed through the main support 11 and the auxiliary support 12 of the mounting assembly 10 . The second rotating shaft 22 also has a set of connecting rod portions 221 and a In the fixing portion 222, a second switching cam 223 and a second transmission cam 225 are arranged on the second rotating shaft 22. The sleeve portion 221 of the second rotating shaft 22 is formed at one end of the second rotating shaft 22 and rotatably penetrates through it. The main support 11 and the auxiliary support 12 , the fixing part 222 of the second rotating shaft 22 is formed on the other end of the second rotating shaft 22 , and the second switching cam 223 and the second transmission cam 225 are provided on the socket rod of the second rotating shaft 22 The second switching cam 223 corresponds to the position of the first switching cam 213 of the first rotating shaft 21 , and the second transmission cam 225 corresponds to the position of the first transmission cam 215 of the first rotating shaft 21 . The second switching cam 223 has a second switching stop end 2231 and a second switching free end 2232 , and the second transmission cam 225 has a second transmission stop end 2251 and a second transmission free end 2252 .

The two torque generating modules 30 are respectively sleeved and fixed on the socket rod portion 211 of the first rotating shaft 21 and the socket rod portion 221 of the second rotating shaft 22 , thereby providing the first rotating shaft 21 and the second rotating shaft 22 for pivoting torque required. Each torsion generating module 30 includes a plurality of disk-shaped elastic pads 31 , a plurality of friction pads 32 , a plurality of spacers 34 and a fixing piece 33 , and each spacer 34 is located between two adjacent friction pads 32 . During this time, the plurality of disk-shaped elastic spacers 31 and the fixing member 33 are fixed on the ends of the corresponding first rotating shaft 21 and the second rotating shaft 22 , and are away from the mounting assembly 10 . In the specific embodiment of the present invention, the disk-shaped elastic washer 31 and the friction washer 32 are sleeved on the socket rods 211 and 221 and clamped to the main support 11 , the auxiliary support 12 and the fixing member 33 . between.

Further, in the specific embodiment of the present invention, the disk-shaped elastic washer 31 is provided between the auxiliary support 12 and the fixing member 33 , and the friction washer 32 is provided between the main support 11 and the auxiliary support 12 .

As shown in FIG. 3 and FIG. 7 , the switching member 41 is a rigid sheet body, which is arranged between the first switching cam 213 of the first rotating shaft 21 and the second switching cam 223 of the second rotating shaft 22 . The pivoting action of a rotating shaft 21 and the second rotating shaft 22 correspondingly switches and controls the locking and pivoting modes of the first switching cam 213 and the second switching cam 223 . Specifically, the switching member 41 is switched to the first switching stop end 2131 of the first switching cam 213 to control the locking of the first rotating shaft 21 while the second rotating shaft 22 is pivoted; the switching member 41 is switched to the second switching cam 223 The second switching stop end 2231 controls the locking of the second rotating shaft 22 while the first rotating shaft 21 pivots. More specifically, the first switching free end 2132 and the second switching free end 2232 of the first switching cam 213 and the second switching cam 223 push against the switching member 41 in sequence, so that the switching member 41 is in the first switching position. The switching cam 213 and the second switching cam 223 move back and forth, and when the switching member 41 moves along the switching free ends 2132 , 2232 of one switching cam 213 , 223 , the switching stop end 2231 of the other switching cam 223 , 213 , 2131 and the switching member 41 are locked with each other and cannot be rotated. In the specific embodiment of the present invention, both ends of the switching member 41 are respectively formed as straight sides, and the switching stop ends 2131 and 2231 of each switching cam 213 and 223 are formed as flat surfaces. When the straight sides of the switching member 41 correspond to When the planar switching stop ends 2131 and 2231 on the switching cams 213 and 223 are in contact with each other, the switching cams 213 and 223 are in contact with each other. The switching member 41 is in a locked state and cannot be rotated, but the structure that enables the switching cams 213 and 223 and the switching member 41 to lock each other is not limited to the above.

As shown in FIG. 4 , the buffer elastic sheet 42 is an elastic sheet body, and is disposed between the first transmission cam 215 of the first rotating shaft 21 and the second transmission cam 225 of the second rotating shaft 22 . Both ends of the buffer elastic sheet 42 have symmetrical A first elastic arm 421 and a second elastic arm 422, the first elastic arm 421 and the second elastic arm 422 are respectively held against the first transmission cam 215 and the second transmission cam 225, the buffer elastic piece 42 is based on the first rotating shaft 21 and the pivoting mode of the second rotating shaft 22, so that the first elastic arm 421 and the second elastic arm 422 control the degree of elastic compression or elastic release against the first transmission cam 215 and the second transmission cam 225, so that the The first rotating shaft 21 and the second rotating shaft 22 are formed with a moment that drives the first rotating shaft 21 and the second rotating shaft 22 to rotate. Specifically, the buffer elastic sheet 42 controls the first elastic arm 421 and the second elastic arm 422 to press against the first transmission stop end of the first transmission cam 215 according to the pivoting mode of the first rotation shaft 21 and the second rotation shaft 22 . 2151 and the first transmission free end 2152, the second transmission stop end 2251 of the second transmission cam 225 and the second transmission free end 2252 of the elastic compression or elastic release degree. The above-mentioned buffer elastic sheet 42 can form the required elastic force by using the material or structure, and can also form the required elastic force by using the material and the structure at the same time.

The first support frame 51 is fixed on the fixing portion 212 of the first rotating shaft 21 and can be linked with the first rotating shaft 21 , and the first support frame 51 is used for fixing the first base 61 of the electronic device 60 to each other. , so that the first rotating shaft 21 of the switchable biaxial hinge can be connected to the first base 61 through the first bearing frame 51 .

The second support frame 52 is fixed on the fixing portion 222 of the second rotating shaft 22 so as to be able to be linked together with the second rotating shaft 22 , and the second support frame 52 is used for fixing the second base body 62 of the electronic device 60 to each other. , so that the second rotating shaft 22 of the switchable biaxial hinge can be connected to the second base 62 through the second bearing frame 52 .

Referring to FIG. 1 , FIG. 3 and FIG. 4 , when the first base 61 and the second base 62 of the electronic device 60 are in a covered state, the first switching of the first switching cam 213 of the first rotating shaft 21 is free The end 2132 abuts against the switching member 41 , and the second rotating shaft 22 uses the second switching stop end on the second switching cam 223 The 2231 and the switching member 41 are locked with each other, and the two ends of the buffer elastic sheet 42 abut against the first transmission cam 215 of the first rotating shaft 21 and the second transmission cam 225 of the second rotating shaft 22 respectively.

At this time, when the user starts to turn over the second base body 62, since the switching member 41 can move along the first switching free end 2132 of the first switching cam 213 of the first rotating shaft 21, the main support 11, the auxiliary support 12 and the The second rotating shaft 22 will rotate relative to the first rotating shaft 21 together. Since the second rotating shaft 22 and the switching member 41 are locked with each other, the first switching cam 213 of the first rotating shaft 21 and the second switching cam 223 of the second rotating shaft 22 have no The space is available for the switching member 41 to move, so the second rotating shaft 22 cannot rotate relative to the main support 11 and the auxiliary support 12 .

5 and FIG. 7 , until the first switching stop end 2131 of the first switching cam 213 of the first rotating shaft 21 faces the switching member 41 , the first switching cam 213 of the first rotating shaft 21 and the switching member 41 are between At this time, the second rotating shaft 22 can start to rotate further relative to the main support 11 and the auxiliary support 12, and the second switching cam 223 of the second rotating shaft 22 can freely switch The end 2232 pushes the switching member 41 to move toward the first switching cam 213 of the first rotating shaft 21 until the switching member 41 moves to the first transmission stop end 2151 to form mutual locking.

Further referring to FIG. 6 to FIG. 8 , in the process of switching from the rotation of the first rotating shaft 21 to the rotating of the second rotating shaft 22 , the first elastic arm 421 of the buffer elastic sheet 42 will adjust to the first rotating shaft 21 according to the degree of rotation of the first rotating shaft 21 . The elastic compression amount of the first transmission stop end 2151 of the transmission cam 215 gradually increases. The amount of elastic compression of the second elastic arm 422 of the buffer elastic sheet 42 on the second transmission stop end 2251 of the second transmission cam 225 gradually decreases according to the degree of rotation of the second rotating shaft 22 . Abut against the free end 2252 of the second transmission. From the above elastic variation relationship, it can be known that the buffer elastic piece 42 will indeed produce a corresponding buffer effect according to the relative rotation between the first rotating shaft 21 and the second rotating shaft 22, which can reduce the problem of stuck feel during switching and provide smooth operating feel. Since the rotation of the first rotating shaft 21 and the second rotating shaft 22 is buffered, the first switching protrusion of the switching member 41 on the first rotating shaft 21 can be effectively reduced. The collision between the wheel 213 and the second switching cam 223 of the second rotating shaft 22 can avoid the abnormal noise generated during the collision.

As shown in FIG. 2 to FIG. 4 , in the first preferred embodiment of the switch-type biaxial hinge of the present invention, the through-slot 111 is formed on the main support 11 , and the through-slot 111 is located between the first rotating shaft 21 and the first rotating shaft 21 . Between the two rotating shafts 22 , the aforementioned switching member 41 and the aforementioned buffer elastic sheet 42 are accommodated in the through grooves 111 of the main support 11 , and the first switching cam 213 and the first transmission cam 215 of the first rotating shaft 21 are integrally formed. Where the socket rod portion 211 of the first rotating shaft 21 is adjacent to the fixing portion 212 thereof, the second switching cam 223 and the second transmission cam 225 of the second rotating shaft 22 are also integrally formed on the socket of the second rotating shaft 22 by integral molding. The rod portion 221 is adjacent to its fixing portion 222 , and the two torsion force generating modules 30 are located on one side adjacent to the auxiliary support 12 and away from the main support 11 .

Except that the first switching cam 213 and the first transmission cam 215 are integrally formed on the first rotating shaft 21, and the second switching cam 223 and the second transmission cam 225 are integrally formed on the second rotating shaft 22. In addition to the structural design, it can also be an independent structural design. Please refer to FIG. 9 to FIG. 11 , which are the second preferred embodiment of the switch-type biaxial hinge device 1A of the present new type. Since the operation principle of the second preferred embodiment is the same as that of the first preferred embodiment, it will not be repeated here, and only the structural differences will be described. The combination of the first switching cam 213A, the second switching cam 223A and the switching member 41A and the combination of the first transmission cam 215A, the second transmission cam 225A and the buffer spring 42A can also be selectively provided on the main support 11A and the auxiliary support Between the seat 12A and the two torque generating modules 30A. In the specific embodiment of the present invention, the first switching cam 213A of the first rotating shaft 21A and the second switching cam 223A of the second rotating shaft 22A are respectively sleeved and fixed on the first rotating shaft 21A and the second rotating shaft 223A in the form of separate components. The socket rods 211A and 221A of the rotating shaft 22A are disposed between the main support 11A and the spacer 34A, as shown in FIG. 12 . Correspondingly, the transmission member 41A is also disposed between the main support 11A and the spacer 34A. In between, the first transmission cam 215A of the first rotating shaft 21A and the second transmission cam 225A of the second rotating shaft 22A are also respectively sleeved in the form of separate members and fixed on the first rotating shaft 21A and the second rotating shaft 22A. Sections 211A, 221A , and is arranged between the auxiliary support 12A and the spacer 34A, as shown in FIG. 13 , correspondingly, the buffer elastic sheet 42A is also arranged between the auxiliary support 12A and the spacer 34A, and the disk of the torsion generating module 30A is The elastic pad 31A and the friction pad 32A are clamped between the auxiliary support 12A and the fixing member 33A, and the switching cams 213A, 223A and the transmission cams 215A, 225A are used for switching and buffering the first rotating shaft 21A and the second In addition to the rotation of the two rotating shafts 22A, an effect like a friction pad can also be produced.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art , without departing from the scope of the technical solution of the present invention, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

1: Switching type double shaft hub

10: Install components

11: Main support

111: Grooving

12: Auxiliary support

21: The first reel

211: Socket rod

212: Fixed part

22: The second reel

221: Socket rod

222: Fixed part

225: Second drive cam

30: Torque Generation Module

31: Disc-shaped elastic gasket

32: Friction pads

33: Fixtures

34: Spacer

41: Switching Pieces

42: Buffer shrapnel

421: First elastic arm

422: Second elastic arm

51: The first bracket

52: Second bracket

Claims (10)

A switchable dual-shaft hub, comprising: an installation component; a first rotating shaft, which is rotatably disposed on the mounting assembly, and a first switching cam and a first transmission cam are arranged on the first rotating shaft; a second rotating shaft, which is arranged parallel to the first rotating shaft, and is rotatably disposed on the mounting assembly, and a second switching cam and a second transmission cam are arranged on the second rotating shaft; A switching member is disposed between the first switching cam and the second switching cam. The switching member switches and controls the locking and pivoting of the first switching cam and the second switching cam according to the pivoting action of the first rotating shaft and the second rotating shaft. model; A buffer elastic piece is arranged between the first transmission cam and the second transmission cam. The two ends of the buffer elastic piece have a first elastic arm and a second elastic arm symmetrically. The buffer elastic piece is based on the first rotating shaft and the second rotating shaft. In the pivoting mode, the first elastic arm and the second elastic arm control the degree of elastic compression or elastic release of the first transmission cam and the second transmission cam correspondingly. The switchable biaxial hub of claim 1, wherein: The first switching cam has a first switching stop end and a first switching free end; The second switching cam has a second switching stop end and a second switching free end; The switching element is switched to the first switching stop end, so as to control the locking of the first rotating shaft and the pivoting of the second rotating shaft; The switching member is switched to the second switching stop end to control the locking of the second rotating shaft while the first rotating shaft is pivoted. The switchable biaxial hub of claim 2, wherein: The first transmission cam has a first transmission stop end and a first transmission free end; The second transmission cam has a second transmission stop end and a second transmission free end; The buffer shrapnel controls the first elastic arm and the second elastic arm to press against the first transmission stop end and the first transmission free end of the first transmission cam according to the pivoting mode of the first rotation shaft and the second rotation shaft, and the second transmission The degree of elastic compression or elastic release between the second transmission stop end of the cam and the second transmission free end. The switchable biaxial hub of claim 1, wherein: The first switching cam and the first transmission cam are integrally formed on the first rotating shaft; The second switching cam and the second transmission cam are integrally formed on the second rotating shaft. The switch-type dual-axis hinge device according to claim 1, wherein the mounting assembly has a through slot, and the switching member and the buffer elastic sheet are accommodated in the through slot. The switchable biaxial hinge device of claim 1, further comprising two torsion force generating modules sleeved and fixed on the first rotating shaft and the second rotating shaft respectively, the two torsion force generating modules providing the first rotating shaft and the second rotating shaft The torque required for the pivoting of the two shafts. The switch-type double-shaft hinge device according to claim 6, wherein the installation assembly comprises a main support and an auxiliary support arranged at a distance from each other, and the first rotating shaft and the second rotating shaft are parallel and rotatably penetrate through the main support and the auxiliary support. The auxiliary support, the switching element and the buffer elastic sheet are arranged on the main support, and the two torsion generating modules are located on one side adjacent to the auxiliary support and away from the main support. The switch-type double-shaft hinge device as claimed in claim 7, wherein the combination of the first switching cam, the second switching cam and the switching member, and the combination of the first transmission cam, the second transmission cam and the buffer elastic sheet are optional It is arranged between the main support, the auxiliary support and the two torsion generating modules. The switch-type biaxial hinge device according to claim 7, wherein each torsion generating module comprises a plurality of disk-shaped elastic pads, a plurality of friction pads, a plurality of spacers and a fixing piece, each spacer Located between two adjacent friction pads, the plurality of disk-shaped elastic pads and the fixing member are arranged on the end of the corresponding first rotating shaft or the second rotating shaft, and are far away from the installation component. An electronic device comprising a first base body, a second base body, and at least one of the switch-type dual-axis hinges as described in claims 1 to 9, wherein the first rotating shaft of the switch-type dual-axis hinge is connected to the first The seat body and the second rotating shaft are connected to the second seat body.

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