CN216951254U

CN216951254U - Hinge assembly and folding electronic device

Info

Publication number: CN216951254U
Application number: CN202220588261.XU
Authority: CN
Inventors: 刘新伟
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2022-03-16
Filing date: 2022-03-16
Publication date: 2022-07-12
Anticipated expiration: 2032-03-16

Abstract

The present disclosure relates to a hinge assembly and a folding electronic device. The hinge assembly includes a trajectory defining bar including a first arc guide; the pedestal, the pedestal includes first circular arc guide slot and holding surface, the plane setting is personally submitted to the holding surface, first circular arc guide slot with first circular arc guide rail swing joint, first circular arc guide rail with relative rotation between the first circular arc guide slot switches the state of hinge subassembly, the state of hinge subassembly is including expansion state and fold condition, when the hinge subassembly is in expansion state and fold condition, the holding surface all is used for supporting foldable electronic equipment's flexible screen.

Description

Hinge assembly and folding electronic device

Technical Field

The present disclosure relates to the field of terminal technologies, and in particular, to a hinge assembly and a foldable electronic device.

Background

With the development of the flexible OLED display screen technology and the extreme experience that the foldable electronic device has portability of a common electronic device and large-screen display after being unfolded, the foldable electronic device has gradually become an important trend in the development of mobile terminals and has become an important field for competition of various large-terminal manufacturers. The state of current foldable electronic equipment switches and mainly relies on the hinge, through the folding and the expansion of hinge drive electronic equipment fold and expand.

SUMMERY OF THE UTILITY MODEL

The present disclosure provides a hinge assembly and a folding electronic device to solve the disadvantages of the related art.

According to a first aspect of embodiments of the present disclosure, there is provided a hinge assembly including:

a trajectory defining rod comprising a first arc guide;

the base body comprises a first arc guide groove and a supporting surface, at least the middle part of the supporting surface is in plane arrangement, the first arc guide groove is movably connected with the first arc guide rail, the first arc guide rail is switched with the relative rotation between the first arc guide grooves, the hinge assembly is in an unfolding state and a folding state, and the supporting surface is used for supporting the flexible screen of the folding electronic equipment.

Optionally, the seat body includes an upper bracket and a lower bracket assembled with the upper bracket, the upper bracket and the lower bracket are stacked, the upper bracket and the lower bracket cooperate to form the first arc-shaped guide groove, and the support surface is located on a surface of the upper bracket deviating from the lower bracket.

Optionally, the lower bracket includes a plurality of concave arc portions, and the plurality of concave arc portions are located on the same side of the lower bracket or on two opposite sides of the lower bracket;

the upper bracket comprises a plurality of convex arc parts facing away from the supporting surface, the convex arc parts are arranged corresponding to one of the concave arc parts, and the convex arc parts and the concave arc parts are matched to form the first arc guide groove.

Optionally, the lower bracket includes a first bracket and a second bracket assembled to the first bracket, the second bracket cooperates with the upper bracket to form the first arc-shaped guide groove, and a surface of the first bracket facing away from the second bracket is disposed opposite to the support surface and forms an outer surface of the hinge assembly.

Optionally, the trajectory limiting rod further includes a first rotating portion disposed away from the first arc guide rail;

the hinge assembly further comprises a fixing piece, the fixing piece is used for being connected with a middle frame of the folding type electronic equipment, the fixing piece comprises a second rotating portion, and the second rotating portion is rotatably connected with the first rotating portion.

Optionally, the first rotating part includes a first shaft hole, and the second rotating part includes a second shaft hole;

the hinge assembly further comprises a rotating shaft, and the rotating shaft is respectively in rotating connection with the first shaft hole and the second shaft hole.

Optionally, the method further includes:

the synchronous rod comprises a synchronous end and a sliding end, and the sliding end is connected with the fixing piece in a sliding mode.

The synchronous transmission part is arranged on the base body and is respectively connected with the synchronous ends of at least one group of synchronous rods which are arranged oppositely, so that the synchronous rods which are arranged oppositely move synchronously.

Optionally, the synchronizing drive comprises a synchronizing gear set, the synchronizing end comprising a mesh tooth, the mesh tooth meshing with either end gear of the synchronizing gear set.

Optionally, the sliding end includes a linear sliding rail, and an extending direction of the linear sliding rail is perpendicular to a central rotating shaft direction of the synchronizing end;

the mounting includes first holding tank and certainly the inside sunken linear type guide slot of lateral wall of first holding tank, first holding tank with second rotation portion follows the central pivot direction of second rotation portion sets up side by side, the slip end at least part is located in the first holding tank, the linear type slide rail with linear type guide slot sliding fit.

Optionally, the synchronizing rod further includes a positioning column disposed at the sliding end, and an extending direction of the positioning column is the same as a direction of a central rotating shaft of the synchronizing end;

the hinge assembly further includes:

the screen backup pad, the screen backup pad at least part set up in the top of mounting, the screen backup pad includes the orientation the location spout that the mounting set up, the location spout with the reference column cooperation, the rotation of synchronizing bar switches the position of screen backup pad.

Optionally, the sliding end includes a second receiving groove, and the positioning column is disposed on a side wall of the second receiving groove;

the screen supporting plate comprises a supporting main body and a first convex part extending from the supporting main body to one side of the fixing part, the positioning sliding groove is formed in the first convex part, and at least part of the first convex part is located in the second accommodating groove.

Optionally, the screen support further includes a second arc guide rail disposed toward the fixing member, the second arc guide rail and the positioning chute are disposed side by side along a central rotation axis of the synchronization end,

the fixing piece comprises a second arc guide groove arranged at the end part, and the second arc guide groove is matched with the second arc guide rail.

Optionally, the hinge assembly includes a plurality of screen support plates, a plurality of fixing members and a plurality of synchronization rods, and the screen support plates, the synchronization rods and the fixing members located on the same side of the base body are mutually matched;

when the hinge assembly is in a folded state, the fixing piece is basically perpendicular to the base body, the screen supporting plates arranged on two sides of the base body are oppositely and obliquely arranged, and the spacing distance between the ends, far away from the base body, of the oppositely arranged screen supporting plates is smaller than the spacing distance between the ends, close to the base body, of the oppositely arranged screen supporting plates.

According to a second aspect of embodiments of the present disclosure, there is provided a folding electronic device including a hinge assembly as described in any one of the embodiments above.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

according to the embodiment, the support surface of the seat body is arranged in a plane shape, so that in an unfolded state, an overlarge local gap between the support surface and the flexible screen can be avoided, and the risk of sinking of the flexible screen when a user operates the flexible screen is reduced; meanwhile, under the folding state, the supporting surface supports the flexible screen, the stress deformation of a mechanical structure on the supporting surface to the flexible screen is reduced, the supporting surface supports the flexible screen in a plane mode, the stress of the supporting surface to the flexible screen can be effectively dispersed, and particularly when the folding electronic equipment falls or collides, the stress can be effectively dispersed, so that the deformation of the flexible screen is favorably reduced.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

FIG. 1 is one of the partial schematic views of a hinge assembly shown in accordance with one exemplary embodiment.

Fig. 2 is a second partial schematic view of the hinge assembly of fig. 1.

Fig. 3 is a third partial schematic view of the hinge assembly of fig. 1.

Fig. 4 is a third partial schematic view of the hinge assembly of fig. 1.

Fig. 5 is a schematic cross-sectional view of the hinge assembly of fig. 1 in a folded state.

FIG. 6 is a schematic diagram illustrating a configuration of a trajectory defining rod according to an exemplary embodiment.

Fig. 7 is a front view of the track defining bar of fig. 6.

Fig. 8 is a fourth partial schematic view of the hinge assembly of fig. 1.

Fig. 9 is a schematic structural diagram illustrating an upper rack in accordance with an exemplary embodiment.

Fig. 10 is a state diagram illustrating a second bracket according to an exemplary embodiment.

Fig. 11 is a schematic view showing another state of the second bracket of fig. 10.

Figure 12 is a schematic diagram illustrating a state of a fastener according to an exemplary embodiment.

Fig. 13 is another schematic view of the fastener of fig. 12.

Fig. 14 is a schematic view of a further condition of the fixing member of fig. 12.

Fig. 15 is a fifth partial schematic view of the hinge assembly of fig. 1.

FIG. 16 is a schematic diagram illustrating a construction of a spindle according to an exemplary embodiment.

FIG. 17 is a schematic diagram illustrating a state of a synchronizing bar according to an exemplary embodiment.

Fig. 18 is a schematic view of another state of the synchronizing bar of fig. 17.

Fig. 19 is a schematic diagram illustrating a structure of a screen supporting plate according to an exemplary embodiment.

Fig. 20 is a partial schematic view of the screen supporting plate of fig. 19.

Fig. 21 is a sixth schematic view of a portion of the hinge assembly of fig. 1.

FIG. 22 is a seventh partially schematic view of the hinge assembly of FIG. 1.

Fig. 23 is another cross-sectional view of the hinge assembly of fig. 1 in a folded condition.

Fig. 24 is a further cross-sectional view of the hinge assembly of fig. 1 in a folded condition.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.

In some related technologies of foldable electronic devices, the state of the foldable electronic device may be switched by a hinge, when the foldable electronic device is in a folded state, a support plate of the hinge may support a bottom bending region of a flexible screen of the foldable electronic device, but the support plate may generally set an arc-shaped groove according to a deformation rule of the flexible screen, which may easily cause a stress trace of the flexible screen, and when the foldable electronic device falls or collides, the bottom bending region of the flexible screen may easily generate a reaction force, which may cause deformation of the flexible screen.

Based on this, as shown in fig. 1-5, fig. 1 is a partial schematic view of a hinge assembly according to an exemplary embodiment, fig. 2 is a second partial schematic view of the hinge assembly 200 of fig. 1, fig. 3 is a third partial schematic view of the hinge assembly 200 of fig. 1, fig. 4 is a fourth partial schematic view of the hinge assembly 200 of fig. 1, and fig. 5 is a cross-sectional schematic view of the hinge assembly 200 of fig. 1 in a folded state. As shown in fig. 1-5, the hinge assembly 200 may include a base body 1 and a track-defining rod 2, as shown in fig. 6 and 7, the track-defining rod 2 may include a first arc-shaped guide rail 21, the base body 1 may include a first arc-shaped guide groove (not shown) and a support surface 11, the support surface 11 may be disposed in a planar shape, the first arc-shaped guide groove may be movably connected to the first arc-shaped guide rail 21, so that when acting force is applied, the first arc-shaped guide rail 21 and the first arc-shaped guide groove may rotate relatively, through cooperation of the first arc-shaped guide rail 21 and the first arc-shaped guide groove, a motion track of the track-defining rod 2 may be defined, and along with rotation between the first arc-shaped guide rail 21 and the first arc-shaped guide groove, a relative position relationship between the track-defining rod 2 and the base body 1 may change, so as to achieve a purpose of switching a state of the hinge assembly 200, that is, the hinge assembly 200 may be switched from the unfolded state shown in fig. 1 to the folded state shown in fig. 5, or from the folded state shown in fig. 5 to the unfolded state shown in fig. 1.

In both the unfolded state shown in fig. 1 and the folded state shown in fig. 5, the supporting surface 11 can be used to support the flexible screen of the foldable electronic device, and since the supporting surface 11 of the base body 1 in the present disclosure is arranged in a planar shape, in the unfolded state, a local gap between the supporting surface 11 and the flexible screen can be prevented from being too large, and a risk that the flexible screen is recessed when a user operates the flexible screen is reduced; meanwhile, under a folding state, the supporting surface 11 supports the flexible screen, stress deformation of a mechanical structure on the supporting surface 11 to the flexible screen is reduced, and the supporting surface 11 supports the flexible screen in a plane mode, so that stress caused by the supporting surface 11 to the flexible screen can be effectively dispersed, and particularly when the folding electronic equipment falls or collides, the stress can be effectively dispersed, and the reduction of the deformation of the flexible screen is facilitated. In the embodiment provided in the present disclosure, the folding electronic device is folded in half and both sides of the folding electronic device are folded by 90 ° when the hinge assembly 200 is in the folded state, and actually, in other embodiments, both sides of the folding electronic device may be folded by other angles, such as 60 °, 45 °, and the like, in the folded state, which is not limited by the present disclosure.

As shown in fig. 8-11, the seat body 1 may include an upper frame 12 and a lower frame 13, the upper frame 12 and the lower frame 13 may be stacked, and the upper frame 12 and the lower frame 13 may be assembled to form a first arc-shaped guide groove, and the support surface 11 may be located on a surface of the upper frame 12 facing away from the lower frame 13. Wherein, the lower bracket 13 may be provided in an integrated structure, or, as provided in the present disclosure, the lower bracket 13 may include a first bracket 131 and a second bracket 132 assembled to the first bracket 131, the first bracket 131 and the second bracket 132 may be assembled in a stacked manner, the second bracket 132 may cooperate with the upper bracket 12 to form a first arc guide groove, and a surface of the first bracket 131 facing away from the second bracket 132 may be provided opposite to the supporting surface 11, which may form an outer surface of the hinge assembly 200.

In order to cooperate to form the first arc guide, the second bracket 132 may include a plurality of concave arcs 1321, the plurality of concave arcs 1321 may be located at two opposite sides of the second bracket 132, for example, as shown in fig. 11, the second bracket 132 may include four concave arcs 1321, two concave arcs 1321 are located at one side of the second bracket 132, and the other two concave arcs 1321 are located at the other opposite side of the second bracket 132; the upper bracket 12 may include a plurality of convex arc portions 121, and any one of the convex arc portions 121 may be disposed opposite to one of the concave arc portions 1321 of the plurality of concave arc portions 1321, and the convex arc portion 121 is accommodated in the concave arc portion 1321 with a certain gap remaining therebetween, so that a first arc guide groove may be formed by cooperation between the convex arc portion 121 and the concave arc portion 1321. Wherein, same upper bracket 12 can correspond a plurality of second support 132 settings, and a plurality of convex arc portions 121 that same upper bracket 12 includes can set up with the sum one-to-one correspondence of concave arc portion 1321 that a plurality of second supports 132 include to this can be through the length of extension upper bracket 12, realizes the multistage formula cooperation between upper bracket 12 and the second support 132, can be in order to realize the cooperation of convex arc portion 121 and concave arc portion 1321 respectively at two tip and middle zone of upper bracket 12.

In the embodiment provided by the present disclosure, the following bracket 13 includes the first bracket 131 and the second bracket 132 assembled with each other, and the second bracket 132 cooperates with the upper bracket 12 to form the first arc-shaped guiding groove, in other embodiments, the lower bracket 13 may also be an integrated structure, and the lower bracket 13 disposed in the integrated structure may cooperate with the concave arc structure disposed in cooperation with the convex arc portion 121 of the upper bracket 12 to form the first arc-shaped guiding groove, which is not limited by the present disclosure, and the foregoing embodiments can be referred to specifically.

The trajectory defining bar 2 may further include a first rotating portion 22 disposed away from the first arc guide 21, for example, one end of the trajectory defining bar 2 may form the first arc guide 21 and the opposite end may form the first rotating portion 22; the hinge assembly 200 may further include a fixing member 3, the fixing member 3 may be used to be coupled to a middle frame of the folding electronic device, as shown in fig. 12 to 14, and the fixing member 3 may include a second rotating portion 31, and the second rotating portion 31 may be rotatably coupled to the first rotating portion 22. Based on this, when an external force acts on the middle frame of the foldable electronic device, the external force can be transmitted to the fixing member 3 through the middle frame, the second rotating portion 31 and the first rotating portion 22 rotate relatively, and then the first arc guide rail 21 of the trajectory limiting rod 2 is driven to rotate relative to the first arc guide groove of the seat body 1, and the relative position relationship between the fixing member 3 and the seat body 1 is switched, so that the middle frame can be driven to move by the fixing member 3 to adjust the relative position relationship between the middle frame and the seat body 1, and the state switching of the foldable electronic device is realized.

Specifically, the first rotating part 22 may include a first shaft hole 221, and the second rotating part 31 may include a second shaft hole 311, as shown in fig. 15 and 16, the hinge assembly 200 may further include a rotating shaft 4, and the rotating shaft 4 is rotatably connected to the first shaft hole 221 and the second shaft hole 311, respectively, so that the rotating connection between the first rotating part 22 and the second rotating part 31 may be achieved through the rotating shaft 4. Of course, the first shaft hole 221 and the second shaft hole 311 are described as examples only, and the first rotating portion 22 and the second rotating portion 31 may be rotatably connected to each other by the rotating shaft 4, but in another embodiment, a shaft hole may be provided in one of the first rotating portion 22 and the second rotating portion 31, and the rotating shaft 4 protruding outward may be provided in the other, and the rotating connection between the first rotating portion 22 and the second rotating portion 31 may be realized by the engagement between the rotating shaft 4 and the shaft hole. Of course, the embodiment of the rotational connection between the first rotating portion 22 and the second rotating portion 31 may also include other schemes, and the details are not repeated here.

In the above embodiments, as shown in fig. 17 and 18, the hinge assembly 200 may further include a synchronization rod 5 and a synchronization transmission member 6, the synchronization rod 5 may include a synchronization end 51 and a sliding end 52 that are oppositely disposed, the sliding end 52 may be slidably connected to the fixing member 3, the synchronization transmission member 6 may be disposed on the base body 1, and the synchronization transmission member 6 may be rotatably connected to the synchronization ends 51 of the set of synchronization rods 5 that are oppositely disposed, respectively, so that when one of the set of synchronization rods 5 moves relative to the synchronization transmission member 6, the other of the set of synchronization rods 5 that are oppositely disposed may be driven by the synchronization transmission member 6 to move, thereby achieving a synchronized movement of the set of synchronization rods 5 relative to the base body 1. Wherein, the set of oppositely arranged synchronization rods 5 can be understood as a synchronization rod 5 located at one side of the seat body 1 and a synchronization rod 5 located at the other side of the seat body 1; the same synchronizing transmission member 6 may be connected to a plurality of sets of oppositely disposed synchronizing rods 5, respectively, which is not limited by the present disclosure. In particular, the synchronizing gear 6 can comprise a set of synchronizing gears, and the synchronizing end 51 of a synchronizing rod 5 can comprise a tooth mesh which can mesh with either end gear of the set of synchronizing gears, while the other end gear can mesh with the synchronizing end 51 of another oppositely disposed synchronizing rod 5, thereby achieving a synchronous transmission between a set of oppositely disposed synchronizing rods 5.

The sliding end 52 may include a linear slide rail 53, and the linear slide rail 53 extends in a direction perpendicular to the central axis 4 of the synchronizing end 51, for example, the linear slide rail 53 extends in a direction indicated by an arrow a in fig. 18, and the centerline axis 4 of the synchronizing end 51 extends in a direction indicated by an arrow B in fig. 18. The fixing member 3 may include a first receiving groove 32 and a linear guide groove 33 recessed from a side wall of the first receiving groove 32, the first receiving groove 32 and the second rotating portion 31 may be arranged side by side along the central rotation axis 4 of the second rotating portion 31, for example, the first receiving groove 32 and the second rotating portion 31 may be arranged side by side along the arrow C in fig. 12, the sliding end 52 of the synchronization rod 5 may be at least partially located in the first receiving groove 32, and the linear slide rail 53 may be slidably engaged with the linear guide groove 33. Therefore, under the condition that the relative rotation between the first arc guide rail 21 of the track limiting rod 2 and the first arc guide groove of the seat body 1 changes, and the relative position relationship between the fixing piece 3 and the seat body 1 is changed, the position change of the fixing piece 3 can be adapted through the sliding fit between the linear slide rail 53 and the linear guide groove 33, so that the hinge assembly 200 is blocked in the state switching process.

In the above embodiment, the synchronizing bar 5 may further include a positioning post 54 disposed on the sliding end 52, and the extending direction of the positioning post 54 is the same as the direction of the central rotating shaft 4 of the synchronizing end 51, i.e. the extending direction of the positioning post 54 is as shown by arrow B in fig. 18; as shown in fig. 19 and 20, the hinge assembly 200 may further include a screen support plate 7, and the screen support plate 7 may be at least partially disposed above the fixing member 3, and the flexible screen of the foldable electronic device may be supported by the screen support plate 7 in the folded state and the unfolded state. As shown in fig. 21-23, the screen support plate 7 may include a positioning sliding slot 71 disposed toward the fixing member 3, the positioning sliding slot 71 is engaged with the positioning post 54, so that during the rotation of the synchronization rod 5 relative to the base 1, the screen support plate 7 can be driven to move relative to the base 1 by the action of the positioning post 54 and the inner wall of the positioning sliding slot 71, and the sliding of the positioning post 54 in the positioning sliding slot 71 is adapted to the sliding of the linear sliding rail 53 of the synchronization end 51 in the linear guiding slot 33 of the fixing member 3, so as to prevent the hinge assembly 200 from being locked. As shown in fig. 23, when the hinge assembly 200 is folded, the positioning post 54 can be limited in the horizontal direction in fig. 23 by the inner wall of the positioning chute 71 through the cooperation between the positioning post 54 and the positioning chute 71, so that the screen support plate 7 can be limited in the horizontal direction in fig. 23, the play of the screen support plate 7 in the horizontal direction is reduced, and the stability of the foldable electronic device in the target state is favorably maintained.

Regarding the matching of the positioning column 54 and the positioning sliding groove 71, specifically, the sliding end 52 may include a second receiving groove 55, the positioning column 54 may be disposed on a side wall of the second receiving groove 55, the screen supporting plate 7 may include a supporting main body 72 and a first protruding portion 73 extending from the supporting main body 72 toward one side of the fixing member 3, the positioning sliding groove 71 may be formed on the first protruding portion 73, the positioning sliding groove 71 may be disposed in an arc shape, and a specific arc shape may be designed according to a relative sliding track between the sliding end 52 of the synchronization rod 5 and the fixing member 3. When assembling the screen support plate 7 and the synchronization rod 5, at least a portion of the first protrusion 73 may be inserted into the second receiving groove 55, and the positioning post 54 may be assembled with the positioning chute 71 of the screen support plate 7.

In some alternative embodiments, the screen support may further include a second circular arc guide rail 74 disposed toward the fixing member 3, and the second circular arc guide rail 74 and the positioning chute 71 may be disposed side by side along the central rotation axis 4 of the synchronizing end 51, i.e., along the direction indicated by the arrow B; the fixed member 3 may further include a second circular arc guide groove 34 at an end portion, the second circular arc guide groove 34 cooperating with the second circular arc guide rail 74; as shown in fig. 24, when the hinge assembly 200 is in the folded state, the end of the second arc guide rail 74 contacts with the top end of the second arc guide groove 34 for limiting, so that the movement of the screen support plate 7 in the vertical direction in fig. 24 can be limited, the play of the screen support plate 7 in the vertical direction can be reduced, and the stability of the foldable electronic device in the target state can be maintained. When the embodiments shown in fig. 23 and 24 are combined in the same hinge assembly 200, the screen support plate 7 can be simultaneously limited in the horizontal direction and the vertical direction, enhancing the stability of the screen support plate 7.

Still referring to fig. 23 and 24, the hinge assembly 200 may include a plurality of screen support plates 7, a plurality of fixing members 3, and a plurality of synchronizing rods 5, and the screen support plates 7, the synchronizing rods 5, and the fixing members 3 located on the same side of the housing 1 may be engaged with each other, for example, the screen support plates 7, the synchronizing rods 5, and the fixing members 3 located on the right side of the housing 1 in fig. 23 and 24 may be engaged with each other, and the screen support plates 7, the synchronizing rods 5, and the fixing members 3 located on the left side of the housing 1 in fig. 23 and 24 may be engaged with each other, and specific engagement manners may refer to the foregoing embodiments. When the hinge assembly 200 is folded, the fixing member 3 may be substantially perpendicular to the base 1, and the screen supporting plates 7 disposed at two sides of the base 1 are relatively inclined, and a distance between ends of the oppositely disposed screen supporting plates 7 far away from the base 1 is smaller than a distance between ends of the oppositely disposed screen supporting plates 7 close to the base 1. That is, in fig. 23 and 24, the distance between the screen support plate 7 positioned on the left side of the base body 1 and the end of the screen support plate 7 positioned on the right side of the base body 1 away from the base body 1 is smaller than the distance between the ends away from the base body 1, and D1 < D2. Based on this, the screen support plate 7 located on the left side of the seat body 1, the screen support plate 7 located on the right side of the seat body 1 and the support surface 11 of the seat body 1 can enclose an internal space as shown in fig. 23 and fig. 24, and under the limiting action of the three, the flexible screen of the folding electronic device can be basically arranged in a water drop shape.

Based on the technical solution of the present disclosure, the present disclosure further provides a foldable electronic device, which may include the hinge assembly 200 according to any one of the above embodiments, and the state of the foldable electronic device may be adjusted by switching the states of the hinge assembly 200, and the stress deformation of the flexible screen may be reduced by the planar supporting surface 11.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A hinge assembly, comprising:

a trajectory defining bar comprising a first circular arc guide rail;

the base body comprises a first arc guide groove and a supporting surface, the supporting surface is arranged in a plane, the first arc guide groove is movably connected with the first arc guide rail, the first arc guide rail and the first arc guide groove are relatively rotated to be switched to the state of the hinge assembly, the state of the hinge assembly comprises an unfolding state and a folding state, and when the hinge assembly is in the unfolding state and the folding state, the supporting surface is used for supporting the flexible screen of the folding electronic equipment.

2. The hinge assembly of claim 1, wherein the base comprises an upper bracket and a lower bracket assembled with the upper bracket, the upper bracket and the lower bracket are stacked, and the upper bracket and the lower bracket cooperate to form the first arc guide groove, and the support surface is located on a surface of the upper bracket facing away from the lower bracket.

3. The hinge assembly of claim 2, wherein the lower bracket includes a plurality of concave arcs on the same side or on opposite sides of the lower bracket;

4. The hinge assembly of claim 2, wherein the lower bracket comprises a first bracket and a second bracket assembled to the first bracket, the second bracket cooperating with the upper bracket to form the first arcuate guide slot, a surface of the first bracket facing away from the second bracket being disposed opposite the bearing surface and forming an outer surface of the hinge assembly.

5. The hinge assembly of claim 1, wherein the trajectory defining bar further comprises a first rotating portion disposed away from the first arcuate rail;

6. The hinge assembly of claim 5, wherein the first rotating portion includes a first shaft hole and the second rotating portion includes a second shaft hole;

7. The hinge assembly of claim 5, further comprising:

the synchronous rod comprises a synchronous end and a sliding end, and the sliding end is connected with the fixing piece in a sliding manner;

8. The hinge assembly of claim 7, wherein the synchronizing transmission comprises a synchronizing gear set, and the synchronizing end comprises a mesh that meshes with either end gear of the synchronizing gear set.

9. The hinge assembly of claim 7, wherein the sliding end comprises a linear slide rail extending perpendicular to a central axis of rotation of the synchronizing end;

10. The hinge assembly of claim 7, wherein the synchronization rod further comprises a positioning post disposed at the sliding end, the positioning post extending in the same direction as the central rotation axis of the synchronization end;

the hinge assembly further includes:

11. The hinge assembly of claim 10, wherein the sliding end includes a second receiving slot, the positioning post being disposed on a sidewall of the second receiving slot;

12. The hinge assembly of claim 10, wherein the screen support plate further comprises a second circular arc guide rail disposed toward the fixing member, the second circular arc guide rail and the positioning chute being disposed side by side in a direction of a central rotation axis of the synchronizing end,

13. The hinge assembly of claim 10, wherein the hinge assembly comprises a plurality of screen support plates, a plurality of fixing members, and a plurality of synchronizing rods, the screen support plates, the synchronizing rods, and the fixing members located on the same side of the housing being engaged with each other;

14. A folding electronic device, characterized in that it comprises a hinge assembly according to any one of claims 1-13.