TWM569383U - Hinge and electronic device using the same - Google Patents

Abstract

A hinge device and an electronic device using the same, the hinge device comprises a first fixing frame, two shaft members, an interlocking mechanism, two fixing members, a second fixing frame and two telescopic members. The two shaft members are parallel to each other and respectively pivoted to the first fixing frame. The second fixing frame is fixed to the first fixing frame and is provided with two mirror-symmetric arc groups, and each arc group is provided with two rotationally symmetric arcs, each arc having a first end and a second end, two first The end distance is not equal to the distance between the two second ends. Each of the telescopic members includes two first links and two second links, each of the first links has a first end, a second end and a first intermediate portion, and the first ends are respectively slidably connected to the two arcs, two The first intermediate portions are pivotally connected to each other, and each of the second links has a third end portion and a fourth end portion, and the third end portions are respectively pivotally connected to the second end portions, and the two fourth end portions are pivotally connected to each other.

Description

Hub and electronic device using the same

The present invention relates to a hinge and an electronic device using the same, and in particular to a hinge applicable to a flexible display member and an electronic device using the same.

There is now an electronic device that includes a hinge and two plates. The hinge is connected between the two plates, and the two plates can be folded from 180 degrees to 0 degrees by a hinge or from 0 degrees to 180 degrees. The electronic device may further be provided with a flexible display member disposed on one side of the inner edge of the two plates and the hinge, and correspondingly folded or unfolded as the two plates are folded or relatively unfolded relative to each other. The electronic device is called a foldable display device. Generally, the two ends of the flexible display member are respectively flat and fixed on the two plates, and the intermediate portion of the flexible display member is supported by the hinge. However, since the flexible display member itself has a certain thickness, when the flexible display member is unfolded in a plane state of 180 degrees or folded into a folded state of 0 degrees, the middle portion of the flexible display member may be Compressed or strained. For example, if the flexible display member is disposed to be properly flattened on the two plates when the two plates are relatively unfolded by 180 degrees, then in this setting, when the two plates are relatively folded at 0 degrees and the flexible display is displayed When the clip is sandwiched between the two plates, the intermediate portion of the flexible display member is pressed to become distorted or may cause damage. If the flexible display member is disposed to be properly flattened on the two plates when the two plates are relatively folded at 0 degrees, then in this setting, when the two plates are relatively unfolded at 180 degrees, the flexible display member The middle portion will be strained and may cause damage.

In view of this, the purpose of the present invention is to propose a hinge and an electronic device using the same, so that when the two plates of the electronic device are relatively folded or relatively unfolded, the flexible display members disposed on the two plates are not pressed. Or tighten.

In an embodiment of the present invention, a hinge includes a first fixing frame, two shaft members, an interlocking mechanism, two fixing members, a second fixing frame and two telescopic members. The two shaft members are arranged parallel to each other and respectively pivoted to the first fixing frame. The same mechanism is disposed between the two shaft members, so that the two shaft members move in opposite directions of rotation. The two fixing members are respectively fixedly connected to the two shaft members. The second fixing frame is fixedly connected to the first fixing frame, and the second fixing frame is provided with two mirror-symmetrical arc groups, and each of the arc groups is provided with two rotation-symmetric arcs, each of which has a first end and a second end End, the first ends of the two arcs of each arc group are rotationally symmetric and the two second ends are rotationally symmetric, and the first distance between the two first ends of the two arcs of each arc group and the second The second distance between the ends is not equal. Each of the telescopic members includes two first links and two second links, each of the first links has a first end, a second end and a first intermediate portion, and the first ends of the two first links slide respectively Connecting the two arcs of the corresponding arc group, the two first intermediate portions of the two first links are pivotally connected to each other, and each of the second links has a third end and a fourth end, and two second links The three ends are pivotally connected to the two second ends of the two first links, and the two fourth ends of the two second links are pivotally connected to each other.

In an embodiment of the present invention, the first fixing frame includes two first bearing plates, and the two shaft members are respectively pivoted on the two first bearing plates, and the same moving mechanism is sandwiched between the two first bearing plates.

In an embodiment of the present invention, the first fixing frame further includes a second bearing plate, the two shaft members are respectively pivotally disposed on the two first bearing plates and the second bearing plate, and the second fixing frame is fixedly connected to the second bearing plate, and the two fixing plates are fixed. The pieces are respectively fixedly connected to the two shaft members and located between the second carrier plate and the second fixing frame.

In an embodiment of the present invention, the same mechanism includes two first gears and two second gears, each of the first gear sleeves is disposed on a corresponding shaft member, and the two second gears are located between the two first gears, and the two second gears Engaging with each other, and each of the second gears meshes with the corresponding first gear.

In an embodiment of the present invention, the symmetric centers of the two arcs in rotational symmetry are located on the axis line of the corresponding shaft member.

In an embodiment of the present invention, the lines connecting the second ends of the two arcs of each arc group are parallel to the line connecting the axes of the two shaft members, and the lines connecting the two second ends of the two arcs of each arc group are connected. The line connecting the two first ends is perpendicular to each other, and the first distance is greater than the second distance.

In an embodiment of the present invention, each of the telescopic members further includes at least one set of two third links, each of the third links having a fifth end, a sixth end, and a second intermediate portion, and the two third links The two fifth end portions are respectively pivotally connected to the two second end portions of the two first connecting rods, and the two second intermediate portions of the two third connecting rods are pivotally connected to each other, and the two sixth end portions of the two third connecting rods are respectively pivotally connected Two third ends of the second link.

In an embodiment of the present invention, an electronic device includes a hinge and two plates as described above. Each of the plates includes a first plate member and a second plate member, the first plate member is fixedly connected to the corresponding fixing member, and the second plate member is pivotally connected to the two fourth end portions of the two second links of the corresponding telescopic member, thereby The second panel slides relative to the first panel.

In an embodiment of the present invention, the first plate member is provided with a first sliding limiting member, the second plate member is provided with a second sliding limiting member, and the first sliding limiting member and the second sliding limiting member are first The plate and the second plate slide in a preset length in a preset direction.

In an embodiment of the present invention, the second plate member is provided with a groove, and the groove is provided with a spring, one end of the spring abuts the closed end of the groove, and the other end of the spring abuts the first plate through the open end of the groove Pieces.

In summary, according to the present invention, a hinge and an electronic device using the same, when the two plates of the electronic device are relatively folded or relatively unfolded, the two arcs of each arc group of the hinge are rotationally symmetric. And the first distance between the two first ends is different from the second distance between the two second ends, so that the corresponding telescopic members slidably connected with the two arcs of each arc group are extensible through the link structure Or shortening, and then pushing the corresponding first plate and the second plate relative to each other to extend or shorten the corresponding plate, so that the flexible display members provided on the two plates are not pressed or tightened.

The detailed features and advantages of the present invention are described in detail below in the embodiments, which are sufficient to enable anyone skilled in the art to understand the technical content of the present invention and to implement it, and to disclose the contents, patent claims, and drawings according to the present specification. Anyone skilled in the art can easily understand the purpose and advantages associated with this creation.

Please refer to FIG. 1. FIG. 1 is a schematic diagram of an electronic device according to an embodiment of the present invention. The electronic device includes a hinge 1 and two plates 2. The hinge 1 is connected between the two plates 2, and the two plates 2 can be folded from 180 degrees to 0 degrees by the hinge 1 or from 0 degrees to 180 degrees. In this embodiment, the electronic device is a foldable display device, which may further be provided with a flexible display member 3, and the flexible display member 3 is disposed on one side of the inner edge of the two plates 2 and the hinge 1, and The two plates 2 are folded or unfolded correspondingly relative to each other or relatively unfolded. Since the flexible display member 3 is disposed on one side of the inner side edges of the two plate bodies 2 and the hinge 1, when the two plate bodies 2 are relatively folded by 180 degrees to 0 degrees by the hinge 1, the flexible display member 3 is clamped to Between the two plates 2. In the present embodiment, the hinge 1 has two groups, but is not limited thereto.

Please refer to FIG. 2 to FIG. 5 simultaneously. FIG. 2 and FIG. 3 are respectively a schematic diagram and an exploded view of the hinge 1 according to an embodiment of the present invention. FIG. 4 and FIG. 5 are respectively a second embodiment of the hinge 1 according to an embodiment. The front view of the mounting frame 500 and the telescopic member 600 are schematic views. The hinge 1 includes a first fixing frame 100, two shaft members 200, an interlocking mechanism 300, two fixing members 400, a second fixing frame 500, two telescopic members 600 and two torsion members 700.

The two shaft members 200 are disposed in parallel with each other and are respectively pivotally disposed on the first fixing frame 100. The same mechanism 300 is disposed between the two shaft members 200 such that the two shaft members 200 move in opposite directions of rotation. In this embodiment, the first fixing frame 100 includes two first bearing plates 110. The two shaft members 200 are respectively pivoted on the two first bearing plates 110, and the same motion mechanism 300 is sandwiched between the two first bearing plates 110. In the present embodiment, the same mechanism 300 includes two first gears 310 and two second gears 320. The first gears 310 are sleeved on the corresponding shaft members 200, and the two second gears 320 are located between the two first gears 310. The two second gears 320 are meshed with each other, and the second gears 320 are engaged with the corresponding first gears 310.

The two fixing members 400 are fixedly connected to one end 201 of the two shaft members 200, respectively. In addition, the two fixing members 400 are also fixedly connected to the two plates 2 as shown in FIG. 1 , that is, the hinge 1 is connected between the two plates 2 . As the two plates 2 are relatively folded or relatively unfolded, the two shaft members 200 are relatively rotated by the two fixing members 400, that is, the two plates 2 can be folded from 180 degrees to 0 degrees by the hinge 1 or unfolded by 0 degrees. To 180 degrees.

The second fixing frame 500 is fixedly connected to the first fixing frame 100. In this embodiment, the first fixing frame 100 further includes a second bearing plate 120, and the two shaft members 200 are respectively pivotally disposed on the two first bearing plates 110 and the second bearing plate 120, and the second fixing frame 500 is fixedly connected to the second bearing plate The two fixing members 400 are fixedly connected to one end 201 of the two shaft members 200, and the two fixing members 400 are located between the second carrier 120 and the second fixing frame 500.

As shown in FIG. 4, the second fixing frame 500 is provided with two mirror-symmetrical arc groups 510 along an imaginary center line 501, and each of the arc groups 510 is provided with two rotationally symmetric arcs 520, each of which is respectively provided. The arcing path 520 has a first end 521 and a second end 522. The two first ends 521 of the two arcs 520 of each arc group 510 are rotationally symmetric and the two second ends 522 are rotationally symmetric, and two of the arc groups 510 are The first distance D1 between the two first ends 521 of the arc 520 and the second distance D2 between the two second ends 522 are not equal. In the present embodiment, the two arcs 520 have a rotationally symmetric center of symmetry located on the axis line of the corresponding shaft member 200. In this embodiment, the lines connecting the two second ends 522 of the two arcs 520 of each arc group 510 are parallel to the line connecting the axes of the two shaft members 200, and the two arcs 520 of each of the arc groups 510 are two. The line connecting the second end 522 and the line connecting the first ends 521 are perpendicular to each other, and the first distance D1 is greater than the second distance D2.

Each of the telescopic members 600 includes two first links 610 and two second links 620. Each of the first links 610 has a first end portion 611, a second end portion 612 and a first intermediate portion 613. The first ends 611 of the two first links 610 are respectively slidably connected to the two arcs of the corresponding arc group 510. In the way 520, the two first intermediate portions 613 of the two first links 610 are pivotally connected to each other. Each of the second links 620 has a third end 621 and a fourth end 622. The two ends 621 of the two second links 620 are respectively pivotally connected to the two second ends 612 of the two first links 610. The two fourth end portions 622 of the second link 620 are pivotally connected to each other. In the present embodiment, each of the telescopic members 600 further includes four sets of two third links 630, each of the third links 630 having a fifth end portion 631, a sixth end portion 632 and a second intermediate portion 633. The two third ends 621 of the two second links 620 of each of the telescopic members 600 are indirectly pivotally connected to the two second ends 612 of the two first links 610 by pivoting the third links 630 respectively.

In this embodiment, as shown in FIG. 5, a pair of two third links 630 adjacent to the two first links 610 are respectively pivotally connected to the two second ends of the two first links 610. The portion 612 and the two second intermediate portions 633 are pivotally connected to each other. a pair of two third links 630 adjacent to the two second links 620, the two sixth end portions 632 are respectively pivotally connected to the two third end portions 621 of the two second links 620, and the two second intermediate portions 633 thereof are mutually Pivot. Each of the two third links 630, which are not adjacent to the two first links 610 and are not adjacent to the two second links 620, respectively have two fifth ends 631 pivotally connected to two adjacent sets of two third links 630 The sixth end portion 632 has two sixth end portions 632 pivotally connected to the two fifth end portions 631 of the adjacent two third links 630, and the two second intermediate portions 633 are pivotally connected to each other.

The two torsion members 700 are respectively disposed on the other end 202 of the two shaft members 200 to provide a proper frictional force to maintain the rotation angle of the two shaft members 200, thereby maintaining the relative deployment angle of the two plate bodies 2. In the present embodiment, each of the torsion members 700 includes a plurality of friction pads, a plurality of elastic spacers and a nut. The two torsion members 700 are well-known technologies in the industry and will not be described again.

Please refer to FIG. 1 and FIG. 6 at the same time. FIG. 6 is a partial exploded view of the electronic device shown in FIG. 1. Each of the boards 2 of the electronic device includes a first board member 21 and a second board member 22, the first board member 21 is fixedly coupled to the corresponding fixing member 400, and the second board member 22 is pivotally connected to the two second members of the corresponding telescopic member 600. The two fourth ends 622 of the rod 620 are thereby slid relative to the first panel 21 by the second panel 22. In this embodiment, the first plate member 21 is provided with a first sliding limiting member 211 (such as a sliding slot), and the second plate member 22 is provided with a second sliding limiting member 221 (such as a bump), and the first sliding limit is The position member 211 and the second slide limit member 221 slide the first plate member 21 and the second plate member 22 in a preset length in a predetermined direction. In this embodiment, the second plate member 22 is provided with a recess 222. The recess 222 is provided with a spring 223. One end of the spring 223 abuts the closed end of the recess 222, and the other end of the spring 223 passes through the opening of the recess 222. The end abuts the first plate member 21.

Please refer to FIG. 7 to FIG. 9 simultaneously. FIG. 7 to FIG. 9 are schematic side views of the two boards 2 of the electronic device according to an embodiment of the present invention, which are relatively unfolded to 180 degrees, 90 degrees, and relatively folded to 0 degrees. For the sake of explanation, the first plate member 21 is omitted from the plate body 2 on the left side in the drawing. As shown in FIG. 7, when the two plates 2 of the electronic device are relatively unfolded to 180 degrees, the first ends 611 of the two first links 610 of the telescopic members 600 of the hinge 1 are respectively slid to the corresponding arcs. The first ends 521 of the two arcs 520 of the group 510, the first ends 611 of the two first links 610 are at a first distance D1 and are the largest, and the first links of the two first links 610 are The first end 611 of the 610 is spaced from the second end 612 of the other first link 610 by a first length L1 and is the smallest, forcing the second link 620 to be the same as the third link 630. The first plate member 21 of the plate body 2 on the right side is closest to the second plate member 22, which corresponds to shortening the entire plate body 2 to the shortest. At this time, the length K1 of the flexible display member 3 is approximately the same as the length K2 when the entire electronic device is expanded to 180 degrees, that is, K1 ≒ K2.

As shown in FIG. 8, when the two plates 2 of the electronic device are relatively unfolded to 90 degrees, the first end portions 611 of the two first links 610 of the telescopic members 600 of the hinge 1 are respectively slid to the corresponding arcs. The middle portion 523 of each of the two arcs 520 of the group 510 (see FIG. 4), the first ends 611 of the two first links 610 are separated by a third distance D3 and smaller than the first distance D1 (D3<D1), The first end 611 of one of the first links 610 is spaced apart from the second end 612 of the other first link 610 by a third length L3 and is larger than the first length L1 (L3> L1), forcing the second link 620 to be the same as the third link 630. At this time, the first plate member 21 of the plate body 2 on the right side of the figure is relatively slid away from the second plate member 22 by a distance, which is equivalent to the entire plate body. 2 stretch a distance. Therefore, in the process of folding the flexible display member 3 from 180 degrees to 0 degrees, since the thickness of the flexible display member 3 itself causes the flexible display member 3 to be folded to 0 degrees, the flexible display member The intermediate portion 31 of 3 is forced to twist the protrusion (causing damage of the flexible display member 3). The design of the present invention allows the entire plate body 2 to extend outwardly and upwardly for a distance, so as to properly accommodate (or eliminate) the displacement of the intermediate portion 31 of the flexible display member 3 by the twisted projection, so that the entire flexibility The two end portions 32 of the display member 3 are extended outwardly with the two plate bodies 2, so that the intermediate portion 31 of the flexible display member 3 which is twisted and protruded can be eliminated, so that the flexible display member 3 is folded during the process. The surface is still flat and the intermediate portion 31 is not twisted.

As shown in FIG. 9, when the two plates 2 of the electronic device are relatively folded to 0 degrees, the first end portions 611 of the two first links 610 of the telescopic members 600 of the hinge 1 are respectively slid to the corresponding arcs. The two second ends 522 of the two arcs 520 of the group 510 are separated by a second distance D2 and are the smallest (D2 < D3 < D1), and the two first links 610 are apart. The first end 611 of one of the first links 610 is spaced apart from the second end 612 of the other first link 610 by a second length L2 and is at a maximum (L2>L3>L1), forcing the second link 620 is the same as the third link 630. At this time, the first plate member 21 of the plate body 2 on the right side of the figure is relatively far away from the second plate member 22 and is farthest away, which is equivalent to the extension of the entire plate body 2 to longest. At this time, it is also possible to completely stretch the both end portions 32 of the flexible display member 3 to the longest distance, thereby completely canceling the twisted projection of the intermediate portion 31 when the flexible display member 3 is folded, so that the flexible display member 3 does not Damaged.

In addition, one end of the spring 223 passing through the recess 222 of the second plate member 22 abuts against the closed end of the recess 222 and the other end abuts against the first plate member 21 through the open end of the recess 222, when the two plates of the electronic device When the body 2 is relatively unfolded to 180 degrees as shown in FIG. 7, the spring 223 is compressed to provide an elastic force to the first plate member 21 so that when the two plates 2 of the electronic device are to be relatively unfolded to an angle smaller than 180 degrees ( When 90 degrees as shown in Fig. 8, it is possible to provide elastic force to push the first plate member 21 to more easily slide relative to the second plate member 22. When the two plates 2 of the electronic device are relatively folded to 0 degrees as shown in Fig. 9, the spring 223 is no longer compressed and no longer provides an elastic force.

In summary, according to the present invention, a hinge 1 and an electronic device using the same, when the two plates 2 of the electronic device are relatively folded or relatively unfolded, pass through two arcs of each arc group 510 of the hinge 1. The track 520 is rotationally symmetric and the first distance D1 between the two first ends 521 and the second distance D2 between the two second ends 522 are unequal, such that the two arcs 520 of each arc group 510 are slidably connected. The corresponding telescopic member 600 can be extended or shortened by the link structure, thereby pushing the corresponding first plate member 21 and the second plate member 22 to slide relative to each other to extend or shorten the corresponding plate body 2, so as to be disposed on the two plates 2 The upper flexible display member 3 is not pressed or strained.

Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the present invention, and any person skilled in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of protection is subject to the definition of the scope of the attached patent application.

1‧‧‧Bridge

100‧‧‧First mount

110‧‧‧First board

120‧‧‧Second board

200‧‧‧ shaft parts

201‧‧‧One end of the shaft

202‧‧‧The other end of the shaft

300‧‧‧Community agencies

310‧‧‧First gear

320‧‧‧second gear

400‧‧‧Fixed parts

500‧‧‧Second holder

501‧‧‧ center line

510‧‧‧Arc Group

520‧‧‧Arc

521‧‧‧ first end

522‧‧‧ second end

523‧‧‧ middle place

600‧‧‧Flexible parts

610‧‧‧first link

611‧‧‧ first end

612‧‧‧ second end

613‧‧‧ first intermediate part

620‧‧‧second connecting rod

621‧‧‧ third end

622‧‧‧fourth end

630‧‧‧ Third Link

631‧‧‧5th end

632‧‧‧6th end

633‧‧‧ second intermediate part

700‧‧‧ Torque parts

2‧‧‧ board

21‧‧‧First board

211‧‧‧First sliding limiter

22‧‧‧Second board

221‧‧‧Second sliding limiter

222‧‧‧ Groove

223‧‧ ‧ spring

3‧‧‧Flexible display parts

31‧‧‧Intermediate

32‧‧‧ Both ends

D1‧‧‧First distance

D2‧‧‧Second distance

D3‧‧‧ third distance

L1‧‧‧ first length

L2‧‧‧ second length

L3‧‧‧ third length

K1‧‧‧ Length of flexible display

K2‧‧‧ Length of electronic device

1 is a schematic view of an electronic device according to an embodiment of the present invention; FIG. 2 is a schematic view of a hinge of an embodiment of the present invention; FIG. 3 is an exploded view of a hinge of an embodiment of the present invention; FIG. 5 is a schematic view showing a telescopic member of a hinge of an embodiment of the present invention; FIG. 6 is a partial exploded view of the electronic device according to an embodiment of the present invention; FIG. FIG. 8 is a side elevational view showing the two plates of the electronic device in an embodiment of the present invention being unfolded to a relative degree of 90 degrees; FIG. A side view of the two plates of the electronic device according to an embodiment of the present invention is folded to 0 degrees.

Claims (10)

A hinge device includes: a first fixing frame; two shaft members disposed parallel to each other and respectively pivoted to the first fixing frame; a cooperating mechanism disposed between the two shaft members to make the two shaft members opposite The two rotating members are fixedly connected to the two shaft members; a second fixing frame is fixedly connected to the first fixing frame, and the second fixing frame is provided with two mirror-symmetrical arc groups, each of which The arc group is provided with two arcs of rotational symmetry, each arc prop has a first end and a second end, and the two first ends of the arcs of each arc group are rotationally symmetric and the two The two ends are rotationally symmetric, and a first distance between the two first ends of the two arcs of each of the arc groups is not equal to a second distance between the two second ends; and two telescopic members, Each of the telescopic members includes two first links and two second links, each of the first links having a first end, a second end and a first intermediate portion, the two first links The two first ends are respectively slidably connected to the two arcs of the corresponding arc group, and the two first intermediate portions of the two first links are mutually The second link has a third end and a fourth end, and the third ends of the two links are respectively pivotally connected to the second ends of the two first links The two fourth ends of the two second links are pivotally connected to each other. The pivoting device of claim 1, wherein the first fixing frame comprises two first bearing plates, and the two shaft members are respectively pivoted on the two first bearing plates, and the same moving mechanism is sandwiched between the two Between the first decks. The pivoting device of claim 2, wherein the first fixing frame further comprises a second bearing plate, the two shaft members are respectively pivoted on the two first bearing plates and the second bearing plate, The second fixing frame is fixedly connected to the second supporting plate, and the two fixing members are respectively fixedly connected to the two shaft members and located between the second receiving plate and the second fixing frame. The hinge device of claim 1, wherein the same mechanism includes two first gears and two second gears, each of the first gear sleeves is disposed on a corresponding one of the shaft members, and the two second gears are located Between the two first gears, the two second gears mesh with each other, and each of the second gears meshes with the corresponding first gear. The hinge of claim 1, wherein the two arcs are rotationally symmetric with a center of symmetry located on a corresponding axis of the shaft member. The hinge of claim 1, wherein a line connecting the two ends of the two arcs of each of the arc groups is parallel to a line connecting the axes of the two shaft members, each of the arcs The line connecting the two second ends of the two arcs is perpendicular to the line connecting the two first ends, and the first distance is greater than the second distance. The hinge of claim 1, wherein each of the telescopic members further comprises at least one set of two third links, each of the third links having a fifth end and a sixth end a second intermediate portion, the two end portions of the two third links are respectively pivotally connected to the two second ends of the two first links, and the two second intermediate portions of the two third links are mutually The two sixth ends of the two third links are respectively pivotally connected to the two third ends of the two second links. An electronic device, comprising: the hinge according to any one of claims 1 to 7; and two plates, each of the plates comprising a first plate and a second plate, the first plate Fixing the corresponding fixing member, the second plate is pivotally connected to the two fourth ends of the two second links of the corresponding telescopic member, whereby the second plate is opposite to the first plate slide. The electronic device of claim 8, wherein the first plate member is provided with a first sliding limiting member, and the second plate member is provided with a second sliding limiting member, the first sliding limiting member And the second sliding limiting member slides the first plate and the second plate in a preset length in a preset direction. The electronic device of claim 9, wherein the second plate member is provided with a recess, the recess is provided with a spring, one end of the spring abuts a closed end of the recess, the spring The other end abuts the first plate through an open end of the groove.