Foldable components for electronic devices

Abstract

A foldable component (1) for an electronic device, the foldable component (1) comprising a housing (2), the housing (2) comprising a first portion (2a), a second portion (2b) and a third portion (2c). The first portion (2a) and the second portion (2b) are pivotally connected to opposite edges of the third portion (2c), a first hinge component (14) connects the first portion (2a) and the third portion (2c), and a second hinge component (15) connects the second portion (2b) and the third portion (2c). The first portion (2a) is capable of pivoting relative to the third portion (2c) around a first component rotation axis (A1) via the first hinge component (14), and the second portion (2b) is capable of pivoting relative to the third portion (2c) around a second component rotation axis (A2) via the second hinge component (15). A synchronization device (3) connects the first part (2a) and the second part (2b) so that the first part (2a) and the second part (2b) pivot simultaneously; the simultaneous pivoting includes the first part (2a) pivoting clockwise and the second part (2b) pivoting counterclockwise, or the first part (2a) pivoting counterclockwise and the second part (2b) pivoting clockwise. In this way, any dimensional changes caused by the folding action or the unfolding action are offset within the foldable assembly.

Description

Technical Field

[0001] The present invention relates to a foldable assembly for an electronic device. The foldable assembly comprises a housing. The housing comprises a first part, a second part and a third part. Background Art

[0002] The size of mobile devices such as tablets and phones is an important consideration when designing a mobile device. In order to provide the most suitable mobile device possible, the external dimensions of the device must be as small as technically possible, while still requiring the device's display to be as large as possible.

[0003] This problem can be solved by a foldable electronic device, etc., which includes one or more supports interconnected by hinges, covered by a display screen, etc. The one or more supports and the display screen can be folded together to provide the smallest possible electronic device, and can be unfolded to provide the largest possible display screen.

[0004] However, when an electronic device is folded, the display and / or back cover stretches on one side of the neutral axis and contracts on the other side. The neutral axis is the axis along which the display or housing remains constant when folded—that is, it neither stretches nor contracts. Furthermore, continuous folding of the display and / or back cover can lead to permanent deformation due to fatigue, as the folding area is subjected to very high stresses. Summary of the Invention

[0005] The object of the present invention is to provide an improved foldable assembly for an electronic device. These and other objects are achieved by the features of the independent claims. Further implementations are apparent from the dependent claims, the description and the drawings.

[0006] According to a first aspect, a foldable assembly for an electronic device is provided. The foldable assembly includes a housing, the housing including a first portion, a second portion, and a third portion, the first portion and the second portion being pivotally connected to opposite edges of the third portion; a first hinge assembly connecting the first portion and the third portion, and a second hinge assembly connecting the second portion and the third portion; the first portion being capable of pivoting relative to the third portion about a first assembly rotation axis via the first hinge assembly; the second portion being capable of pivoting relative to the third portion about a second assembly rotation axis via the second hinge assembly, the second assembly rotation axis extending parallel to the first assembly rotation axis; when the foldable assembly is in an unfolded state, the first portion, the second portion, and the third portion are aligned on a common plane; when the foldable assembly is in a folded state, the first portion, the second portion, and the third portion are superimposed on each other; a synchronizing device connecting the first portion and the second portion so that the first portion and the second portion pivot simultaneously; the synchronous pivoting comprising the first portion pivoting clockwise and the second portion pivoting counterclockwise, or the first portion pivoting counterclockwise and the second portion pivoting clockwise.

[0007] This technical solution ensures that any dimensional changes of the first hinge assembly caused by a folding action or an unfolding action are offset within the foldable assembly because the second hinge assembly folds accordingly in the opposite direction.

[0008] In a possible implementation manner of the first aspect, when the foldable assembly is in the folded state, an outer surface of the first part and an outer surface of the second part extend parallel to each other.

[0009] In another possible implementation of the first aspect, when the foldable assembly is in the folded state, the second portion is superimposed on the first surface of the third portion, and the first portion is superimposed on the second surface of the third portion. In this way, extending the second portion and the first portion can provide only a minimum width.

[0010] In another possible implementation of the first aspect, when the foldable assembly is in the folded state, a first dimension of an outer surface of the first hinge assembly is larger than a corresponding second dimension of an inner surface of the first hinge assembly, and the first dimension of an outer surface of the second hinge assembly is larger than a corresponding second dimension of an inner surface of the second hinge assembly. This facilitates symmetrical folding.

[0011] In another possible implementation of the first aspect, the first dimension of the outer surface of the first hinge component is equal to the first dimension of the outer surface of the second hinge component, and the second dimension of the inner surface of the first hinge component is equal to the second dimension of the inner surface of the second hinge component. This eliminates the need to stretch components connected to these surfaces.

[0012] In another possible implementation of the first aspect, a sum of the first dimension of the outer surface of the first hinge assembly and the second dimension of the inner surface of the second hinge assembly is constant.

[0013] In another possible implementation of the first aspect, a sum of the second dimension of the inner surface of the first hinge assembly and the first dimension of the outer surface of the second hinge assembly is constant.

[0014] In another possible implementation of the first aspect, the first portion and the second portion pivot at the same speed, such that the first portion and the second portion extend at substantially the same angle relative to the third portion during the pivoting. This facilitates a technical solution in which any elements connected to the portions also maintain their external dimensions unchanged during the folding process.

[0015] In another possible implementation of the first aspect, the foldable component further includes a first surface layer and a second surface layer attached to opposite surfaces of the shell, the first surface layer and the second surface layer extending parallel to each other and parallel to the main plane of the shell.

[0016] In another possible implementation of the first aspect, the housing has a first neutral axis, the first surface layer has a second neutral axis, and the second surface layer has a third neutral axis; the overlapping portion of the first neutral axis, the second neutral axis, and the third neutral axis extend in parallel; the second neutral axis is offset relative to the first neutral axis by a first offset distance in a first direction along an offset axis, wherein the offset axis extends perpendicular to the first component rotation axis and the second component rotation axis; and the third neutral axis is offset relative to the first neutral axis by a second offset distance in a second direction opposite to the first direction. In this manner, folding of the foldable component does not affect the dimensions of the first surface layer and the second surface layer.

[0017] In another possible implementation of the first aspect, the synchronization device includes at least one linear actuator extending in the direction of a transmission axis, the transmission axis extending substantially perpendicular to the first component rotation axis and the second component rotation axis; a first end of the linear actuator is connected to the first part, and a second end of the linear actuator is connected to the second part. This allows the linear actuator to occupy very little space and be installed in any suitable available location.

[0018] In another possible implementation of the first aspect, pivoting one of the first and second parts activates the linear actuator, causing the linear actuator to push the other of the first and second parts to pivot simultaneously at the same speed and in opposite directions. Thus, the linear actuators move synchronously on both sides of the housing.

[0019] In another possible implementation manner of the first aspect, the synchronization device further includes a rotating shaft disposed in the third part, and the linear drive is connected to the rotating shaft.

[0020] In another possible implementation of the first aspect, the synchronization device further includes a motor for rotating the rotating shaft, wherein rotating the rotating shaft causes the linear actuator to move at least partially along the transmission axis. This allows the foldable assembly and any electronic device equipped with the foldable assembly to be automatically folded.

[0021] In another possible implementation of the first aspect, the rotation shaft extends parallel to the first component rotation axis and the second component rotation axis.

[0022] In another possible implementation of the first aspect, the rotation shaft extends perpendicular to the first component rotation axis and the second component rotation axis.

[0023] In another possible implementation of the first aspect, the linear drive includes at least one chain, a metal wire, and / or a sheet material.

[0024] In another possible implementation of the first aspect, the linear actuator includes two wire portions extending on opposite sides of the first neutral axis at equal intervals, so as to synchronously drive the linear actuator along the main surface of the electronic device.

[0025] In another possible implementation of the first aspect, the synchronization device further includes at least one pinion gear, the pinion gear surrounding a portion of the rotating shaft, a first rack gear meshing with the pinion gear at a first position, and a second rack gear meshing with the pinion gear at a second position opposite to the first position, with the first rack gear and the second rack gear extending in the direction of the transmission axis. In this manner, the synchronization device can move synchronously on both sides of the rotating shaft.

[0026] In another possible implementation of the first aspect, the first rack is connected to and supports the first surface layer, and the second rack is connected to and supports the second surface layer.

[0027] In another possible implementation manner of the first aspect, the first surface layer and the second surface layer are configured to slide on the relative surfaces of the third portion of the housing.

[0028] In another possible implementation of the first aspect, the synchronization device further includes a locking device for locking the foldable assembly in at least one of the expanded state and the folded state, the locking device including a cam element that interlocks with a cam portion provided on the rotating shaft. This allows the foldable assembly to be securely locked in place when in the expanded state or the folded state. Furthermore, by providing only a single locking device, individual manufacturing tolerances are not accumulated, thereby providing better flatness in the expanded state while avoiding the need for synchronized movement between several pivot points to provide sufficient locking force.

[0029] In another possible implementation of the first aspect, the cam element surrounds a portion of the rotating shaft, so that the cam element and the rotating shaft share a central axis, thereby providing a reliable locking device that takes up little space.

[0030] In another possible implementation of the first aspect, the cam element is disposed near one end of the rotating shaft and extends at least partially in a first plane perpendicular to the central axis of the rotating shaft. The cam portion extends in the first plane and includes at least one peripheral recess for accommodating a portion of the cam element. This significantly reduces the locking force required on the cam element and the cam portion while maintaining the same locking force for the device. Furthermore, the accuracy of the locked position is improved.

[0031] According to a second aspect, an electronic device is provided. The electronic device includes a foldable assembly according to the above description, wherein the first surface layer of the foldable assembly includes a display screen, and the second surface layer of the foldable assembly includes another display screen or a back cover. This technical solution allows the display screen and / or the back cover to slide relative to the housing when the electronic device is folded, thereby preventing the display screen and other surface layers from wrinkling and / or permanently deforming because the display screen neither stretches nor contracts when the device is folded.

[0032] In one possible implementation of the second aspect, the linear actuator of the foldable assembly at least partially extends through a first tunnel in the first hinge assembly and a second tunnel in the second hinge assembly, thereby avoiding shortening the path of the linear actuator when the device is folded.

[0033] These and other aspects will be apparent from and elucidated with reference to the embodiments described hereinafter. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In the following detailed description of the present invention, various aspects, embodiments and implementations will be explained in more detail with reference to exemplary embodiments shown in the accompanying drawings, in which:

[0035] Figure 1a A schematic side view of an electronic device in an unfolded state provided by one embodiment of the present invention;

[0036] Figure 1b Shown Figure 1a The embodiment is in a folded state;

[0037] Figure 1c for Figure 1a and Figure 1b a perspective view of the illustrated embodiment;

[0038] Figure 2 A partial side view of a foldable assembly provided in accordance with one embodiment of the present invention;

[0039] Figure 3a A schematic side view of a housing of a foldable assembly provided in accordance with an embodiment of the present invention;

[0040] Figure 3b An embodiment of the present invention includes Figure 3a a side view of the housing of the electronic device;

[0041] Figure 4a A partial perspective view of a foldable assembly provided for one embodiment of the present invention;

[0042] Figure 4b for Figure 4a a side view of the illustrated embodiment;

[0043] Figure 5 A partial perspective view of a linear actuator of a foldable assembly according to one embodiment of the present invention;

[0044] FIG6 is a partial perspective view of a foldable assembly provided by one embodiment of the present invention;

[0045] Figure 6b for Figure 6a a partial perspective view of the linear actuator of the illustrated embodiment;

[0046] Figure 7 A partial perspective view of a linear actuator of a foldable assembly according to one embodiment of the present invention;

[0047] Figure 8a A top view of a linear actuator of a foldable assembly according to one embodiment of the present invention;

[0048] Figure 8b for Figure 8a A partial side view of the illustrated embodiment. DETAILED DESCRIPTION

[0049] Figures 1a to 1c An electronic device 13 including a foldable assembly 1 is disclosed, and more detailed description is provided below. The display screen of the electronic device 13 may include

[0050] The first surface layer 4 of the foldable component 1, and another display screen or back cover of the electronic device 13 may include a second surface layer 5 of the foldable component 1. The first surface layer 4 and the second surface layer 5 are supported by the housing 2 including the first portion 2a, the second portion 2b and the third portion 2c. The first portion 2a and the second portion 2b are pivotally connected to opposite edges of the third portion 2c by a first hinge assembly 14 and a second hinge assembly 15.

[0051] The first surface layer 4 and the second surface layer 5 of the foldable assembly 1 can be attached to opposite surfaces of the housing 2 so that the first surface layer 4 and the second surface layer 5 extend parallel to each other and parallel to the main plane of the housing 2. The first surface layer 4 and the second surface layer 5 are preferably fixed to the opposite surfaces of the first part 2a and the second part 2b. The first surface layer 4 and the second surface layer 5 can be used to slide on the opposite surface of the third part 2c of the housing 2.

[0052] The housing 2 includes most of the other components of the electronic device, such as batteries, electronic circuits, optical devices, speakers, etc. One or more of the first part 2a, the second part 2b and the third part 2c can be conical, such as Figure 3a and Figure 3bAccordingly, one or more of the first portion 2a, the second portion 2b and the third portion 2c may have parallel extending surfaces, that is, one or more portions are rectangular parallelepipeds, such as Figure 2 Regardless of the shape of these parts, when the foldable component 1 is in the folded state P2 (as shown in FIG. Figure 1b 、 Figure 2 、 Figure 3b and Figure 4b As shown), the outer surface of the first portion 2a and the outer surface of the second portion 2b may extend parallel to each other.

[0053] The linear actuator 7 of the foldable assembly 1 may extend at least partially through the first tunnel 16 in the first hinge assembly 14 and the second tunnel 17 in the second hinge assembly 15, as shown in FIG. Figure 5 This supports the linear actuator 7 and keeps it in the correct position when the foldable assembly 1 is folded.

[0054] When the foldable component 1 is in the unfolded state P1, the first portion 2a, the second portion 2b and the third portion 2c are aligned on a common plane, and when the foldable component 1 is in the folded state P2, the three portions are superimposed on each other. Figure 1b and Figure 1c In the folded state P2, the user can only see about one-third of the display screen, while in the unfolded state P1, the user can see the entire display screen.

[0055] The foldable assembly 1 includes the housing 2, a first hinge assembly 14 and a second hinge assembly 15. Figure 2 and Figure 3b As shown, the first portion 2a is capable of pivoting relative to the third portion 2c about a first component rotation axis A1 via a first hinge assembly 14. The second portion 2b is capable of pivoting relative to the third portion 2c about a second component rotation axis A2 via a second hinge assembly 15, the second component rotation axis A2 extending parallel to the first component rotation axis A1.

[0056] The synchronization device 3 connects the first part 2a and the second part 2b so that the first part 2a and the second part 2b pivot at the same time. Figure 4a and Figure 6a The simultaneous pivoting includes the first portion 2a pivoting clockwise and the second portion 2b pivoting counterclockwise, or the first portion 2a pivoting counterclockwise and the second portion 2b pivoting clockwise.

[0057] When the foldable assembly 1 pivots between the unfolded state P1 and the folded state P2, the first surface layer 4 and the second surface layer 5 do not undergo dimensional changes. Therefore, the first surface layer 4 and the second surface layer 5 are preferably made of a material that is flexible but not necessarily stretchable. Instead, any dimensional changes can be offset by the simultaneous movement of the first part 2a and the second part 2b, the sliding of the first surface layer 4 and the second surface layer 5 through the third part 2c, and / or the symmetrical movement of the synchronization device 3 through the first hinge assembly 14 and the second hinge assembly 15.

[0058] like Figure 2 As shown, when the foldable assembly 1 is in the folded state P2, a first dimension D14a of the outer surface 14a of the first hinge assembly 14 may be greater than a corresponding second dimension D14b of the inner surface 14b of the first hinge assembly 14. Accordingly, when the foldable assembly 1 is in the folded state P2, a first dimension D15b of the outer surface 15b of the second hinge assembly 15 may be greater than a corresponding second dimension D15a of the inner surface 15a of the second hinge assembly 15.

[0059] The first dimension D14a of the outer surface 14a of the first hinge assembly 14 may be equal to the first dimension D15b of the outer surface 15b of the second hinge assembly 15 , and the second dimension D14b of the inner surface 14b of the first hinge assembly 14 may be equal to the second dimension D15a of the inner surface 15a of the second hinge assembly 15 .

[0060] The sum of the first dimension D14a of the outer surface 14a of the first hinge component 14 and the second dimension D15a of the inner surface 15a of the second hinge component 15 may be constant. Correspondingly, the sum of the second dimension D14b of the inner surface 14b of the first hinge component 14 and the first dimension D15b of the outer surface 15b of the second hinge component 15 may be constant.

[0061] In one embodiment, the first portion 2a and the second portion 2b are pivoted at the same speed so that the first portion 2a and the second portion 2b extend at substantially the same angles α1 and α2 relative to the third portion 2b when pivoting. Figure 4b The foldable assembly 1 is folded into or unfolded from a Z shape, and so is the electronic device 13.

[0062] The housing 2 may have a first neutral axis N1, the first surface layer 4 may have a second neutral axis N2, and the second surface layer 5 may have a third neutral axis N3. The overlapping portion of the first neutral axis N1, the second neutral axis N2, and the third neutral axis N3 extends in parallel; the second neutral axis N2 is offset relative to the first neutral axis N1 by a first offset distance along an offset axis in a first direction D1, wherein the offset axis extends perpendicular to the first component rotation axis A1 and the second component rotation axis A2. Similarly, the third neutral axis N3 is offset relative to the first neutral axis N1 by a second offset distance in a second direction D2 opposite to the first direction D1, as shown in FIG. Figure 1a shown.

[0063] The synchronization device 3 may include at least one linear actuator 7 extending in the direction of a transmission axis A3, which extends substantially perpendicularly to the first and second component rotation axes A1 and A2. A first end 7a of the linear actuator 7 is connected to the first portion 2a, and a second end 7b of the linear actuator 7 is connected to the second portion 2b. Pivoting one of the first and second portions 2a and 2b can cause the linear actuator 7 to be driven so that the linear actuator 7 forces the other of the first and second portions 2a and 2b to pivot simultaneously at the same speed and in opposite directions.

[0064] The linear drive 7 may comprise at least one chain, wire and / or sheet material.The linear drive 7 may further comprise two wire portions extending on equally spaced opposite sides of the first neutral axis N1.

[0065] The synchronization device 3 may further include a rotating shaft 6 disposed in the third portion 2c, and a linear drive 7 is connected to the rotating shaft 6, such as Figure 6a and Figure 6b shown.

[0066] The synchronization device 3 may further comprise a motor for rotating the shaft 6 , which causes the linear drive 7 to move at least partially along the transmission axis A3 .

[0067] The rotation axis 6 can extend parallel to the first component rotation axis A1 and the second component rotation axis A2. Figure 6a and Figure 6b shown.

[0068] The synchronization device 3 may further include at least one pinion 8, which surrounds a portion of the rotating shaft 6, a first rack 9 meshing with the pinion 8 at a first position, and a second rack 10 meshing with the pinion 8 at a second position opposite to the first position, and the first rack 9 and the second rack 10 extend in the direction of the transmission axis A3.

[0069] The first rack 9 can be connected to and support the first surface layer 4, and the second rack 10 can be connected to and support the second surface layer 5. Therefore, when the rotating shaft 6 rotates, the first rack 9 and the first surface layer 4 move in one direction of the transmission axis A3. Correspondingly, the second rack 10 and the second surface layer 5 can move in the opposite direction of the transmission axis A3.

[0070] The rotation axis 6 can also extend perpendicularly to the first component rotation axis A1 and the second component rotation axis A2, as shown in FIG. Figure 8a and Figure 8b shown.

[0071] The synchronization device 3 may also include Figure 7 The locking device 11 is shown. The locking device 11 locks the foldable assembly 1 in at least one of the unfolded state P1 and the folded state P2. The locking device 11 includes a cam element 11a, which interlocks with a cam portion 11b provided on the rotating shaft 6. The cam element 11a can surround a portion of the rotating shaft 6 so that the cam element 11a and the rotating shaft 6 share a central axis.

[0072] like Figure 8a and Figure 8b As shown, the cam element 11a can be arranged near one end of the rotating shaft 6 and extend at least partially in a first plane perpendicular to the central axis of the rotating shaft 6, and the cam portion 11b extends in the first plane and includes at least one peripheral recess 12 for accommodating a portion of the cam element 11a.

[0073] Various aspects and implementations have been described herein in conjunction with various embodiments. However, those skilled in the art, in practicing the claimed subject matter, will be able to understand and implement other variations of the disclosed embodiments by studying the drawings, the disclosure and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and "a" or "an" does not exclude a plurality. A single processor or other unit may perform the functions of several items recited in the claims. The recitation of certain measures in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. The computer program may be stored / distributed on a suitable medium, such as an optical storage medium or solid-state medium provided together with or as part of other hardware, and may also be distributed in other forms, such as via the Internet or other wired or wireless telecommunications systems.

[0074] The use of reference numerals in the claims should not be construed as limiting the scope. Unless otherwise indicated, the drawings (e.g., cross-hatching, arrangement of parts, scale, degrees, etc.) should be read in conjunction with the specification and should be considered part of the entire written description of the invention. When a figure is oriented toward the reader, the terms "horizontal," "vertical," "left," "right," "upward," and "downward," and their adjective and adverb derivatives (e.g., "horizontally," "rightwardly," "upwardly," etc.), as used in the specification, refer to the orientation of the structure shown. Similarly, the terms "inwardly" and "outwardly" generally refer to the orientation of a surface relative to its axis of elongation or axis of rotation, as the case may be.

Claims

1. A foldable component (1) for an electronic device, characterized in that: The foldable assembly (1) comprises a housing (2), the housing (2) comprising a first portion (2a), a second portion (2b) and a third portion (2c), the first portion (2a) and the second portion (2b) being pivotally connected to opposite edges of the third portion (2c); A first hinge assembly (14) connects the first portion (2a) and the third portion (2c), and a second hinge assembly (15) connects the second portion (2b) and the third portion (2c); The first part (2a) is capable of pivoting relative to the third part (2c) around a first component rotation axis (A1) via the first hinge component (14); The second part (2b) is capable of pivoting relative to the third part (2c) about a second component rotation axis (A2) via the second hinge component (15), and the second component rotation axis (A2) extends parallel to the first component rotation axis (A1); When the foldable assembly (1) is in an unfolded state (P1), the first portion (2a), the second portion (2b) and the third portion (2c) are aligned on a common plane; When the foldable component (1) is in a folded state (P2), the first part (2a), the second part (2b) and the third part (2c) are superimposed on each other; A synchronization device (3) connects the first part (2a) and the second part (2b) so that the first part (2a) and the second part (2b) pivot simultaneously; The simultaneous pivoting comprises the first part (2a) pivoting clockwise and the second part (2b) pivoting counterclockwise, or The first portion (2a) pivots counterclockwise and the second portion (2b) pivots clockwise; The synchronization device (3) comprises at least one linear drive (7), the linear drive (7) extending in the direction of a transmission axis (A3), the transmission axis (A3) extending substantially perpendicularly to the first component rotation axis (A1) and the second component rotation axis (A2), a first end (7a) of the linear drive (7) being connected to the first part (2a), and a second end (7b) of the linear drive (7) being connected to the second part (2b); The synchronizing device (3) further comprises a rotating shaft (6) disposed in the third portion (2c), and the linear drive (7) is connected to the rotating shaft (6); The synchronization device (3) further comprises a locking device (11) for locking the foldable assembly (1) into at least one of the unfolded state (P1) and the folded state (P2), wherein the locking device (11) comprises a cam element (11a) interlocked with a cam portion (11b) provided on the rotating shaft (6).

2. The foldable assembly (1) according to claim 1, characterized in that When the foldable component (1) is in the folded state (P2), the outer surface of the first part (2a) and the outer surface of the second part (2b) extend parallel to each other.

3. The foldable assembly (1) according to claim 1 or 2, characterized in that When the foldable component (1) is in the folded state (P2), the second part (2b) is superimposed on the first surface of the third part (2c), and the first part (2a) is superimposed on the second surface of the third part (2c).

4. The foldable assembly (1) according to claim 1 or 2, characterized in that When the foldable component (1) is in the folded state (P2), a first dimension (D14a) of the outer surface (14a) of the first hinge component (14) is greater than a corresponding second dimension (D14b) of the inner surface (14b) of the first hinge component (14), A first dimension (D15b) of the outer surface (15b) of the second hinge component (15) is greater than a corresponding second dimension (D15a) of the inner surface (15a) of the second hinge component (15).

5. The foldable assembly (1) according to claim 4, characterized in that The first dimension (D14a) of the outer surface (14a) of the first hinge component (14) is equal to the first dimension (D15b) of the outer surface (15b) of the second hinge component (15); The second dimension (D14b) of the inner surface (14b) of the first hinge component (14) is equal to the second dimension (D15a) of the inner surface (15a) of the second hinge component (15).

6. The foldable assembly (1) according to claim 4, characterized in that The sum of the first dimension (D14a) of the outer surface (14a) of the first hinge component (14) and the second dimension (D15a) of the inner surface (15a) of the second hinge component (15) is constant.

7. The foldable assembly (1) according to claim 4, characterized in that The sum of the second dimension (D14b) of the inner surface (14b) of the first hinge component (14) and the first dimension (D15b) of the outer surface (15) of the second hinge component (15) is constant.

8. The foldable assembly (1) according to claim 1 or 2, characterized in that The first portion (2a) and the second portion (2b) pivot at the same speed so that the first portion (2a) and the second portion (2b) extend at substantially the same angle (α1 and α2) relative to the third portion (2b) when pivoting.

9. The foldable assembly (1) according to claim 1 or 2, characterized in that The foldable assembly (1) further comprises a first surface layer (4) and a second surface layer (5) attached to opposite surfaces of the housing (2), the first surface layer (4) and the second surface layer (5) extending parallel to each other and parallel to the main plane of the housing (2).

10. The foldable assembly (1) according to claim 9, characterized in that The shell (2) has a first neutral axis (N1), the first surface layer (4) has a second neutral axis (N2), and the second surface layer (5) has a third neutral axis (N3); The first neutral axis (N1), the second neutral axis (N2) and the superimposed portion of the third neutral axis (N3) extend in parallel; The second neutral axis (N2) is offset by a first offset distance relative to the first neutral axis (N1) along an offset axis in a first direction (D1), wherein the offset axis extends perpendicular to the first component rotation axis (A1) and the second component rotation axis (A2); and the third neutral axis (N3) is offset by a second offset distance relative to the first neutral axis (N1) in a second direction (D2) opposite to the first direction (D1).

11. The foldable assembly (1) according to claim 1, characterized in that Pivoting one of the first part (2a) and the second part (2b) causes the linear actuator (7) to drive so that the linear actuator (7) pushes the other of the first part (2a) and the second part (2b) to pivot simultaneously in opposite directions at the same speed.

12. The foldable assembly (1) according to claim 1, characterized in that The synchronization device (3) further comprises a motor for rotating the rotating shaft (6), and rotating the rotating shaft (6) causes the linear drive (7) to move at least partially along the transmission axis (A3).

13. The foldable assembly (1) according to claim 1, characterized in that The rotating shaft (6) extends parallel to the first component rotation axis (A1) and the second component rotation axis (A2).

14. The foldable assembly (1) according to claim 1, characterized in that The rotating shaft (6) extends perpendicularly to the first component rotation axis (A1) and the second component rotation axis (A2).

15. The foldable assembly (1) according to claim 1, characterized in that The linear drive (7) comprises at least one chain, wire and / or sheet material.

16. The foldable assembly (1) according to claim 15, characterized in that The linear drive (7) comprises two wire portions extending on equally spaced opposite sides of a first neutral axis (N1).

17. The foldable assembly (1) according to claim 1, characterized in that The synchronization device (3) further includes at least one pinion (8), wherein the pinion (8) surrounds a portion of the rotating shaft (6), a first rack (9) meshes with the pinion (8) at a first position, and a second rack (10) meshes with the pinion (8) at a second position opposite to the first position, and the first rack (9) and the second rack (10) extend in the direction of the transmission axis (A3).

18. The foldable assembly (1) according to claim 17, characterized in that The first rack (9) is connected to and supports the first surface layer (4), and the second rack (10) is connected to and supports the second surface layer (5).

19. The foldable assembly (1) according to claim 9, characterized in that The first surface layer (4) and the second surface layer (5) are used to slide on the relative surfaces of the third part (2c) of the housing (2).

20. An electronic device (13), characterized in that The electronic device (13) comprises a foldable component (1) according to any one of claims 1 to 19, wherein the first surface layer (4) of the foldable component (1) comprises a display screen; The second surface layer (5) of the foldable component (1) includes another display screen or a back cover.

21. The electronic device (13) according to claim 20, characterized in that The linear drive (7) of the foldable assembly (1) extends at least partially through a first tunnel (16) in the first hinge assembly (14) and a second tunnel (17) in the second hinge assembly (15).

Images