Housing for foldable electronic device, and foldable electronic device

Abstract

The present application provides a housing for a foldable electronic device, and a foldable electronic device. The housing comprises a middle plate, the middle plate comprises a first middle plate and a second middle plate which are connected, and the first middle plate and the second middle plate are made of different materials. The first middle plate and the second middle plate match each other to form a rotating shaft receiving area and a non-rotating shaft receiving area on the middle plate, at least a portion of the first middle plate forms at least a portion of the non-rotating shaft receiving area, and at least a portion of the second middle plate forms at least a portion of the rotating shaft receiving area. The middle plate of the housing provided by the present application has a split structure, and uses different materials, reducing the body weight while maintaining stable chemical properties.

Description

Casing for foldable electronic device and foldable electronic device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on August 14, 2023, with application number 202311028434.8 and application name “Casing for a foldable electronic device and a foldable electronic device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of foldable electronic devices, and more specifically, to a housing for a foldable electronic device and the foldable electronic device. Background Art

[0003] Foldable electronic devices typically include a housing assembly and a display screen, with the housing assembly used to support the display screen. The housing assembly includes two housings and a hinge mechanism that rotatably connects the two housings. Each housing includes a center plate and an outer frame surrounding the center plate. The two sides of the hinge mechanism are connected to the center plates of the two housings. In the industry, the center plates of foldable electronic devices are mostly one-piece structures made of alloy materials, that is, the entire center plate is made of the same alloy material. Different alloys have different properties, and limited by a single material, this one-piece structure cannot take into account multiple performance characteristics. For example, in order to reduce the weight of the fuselage, some manufacturers use low-density alloy materials (e.g., magnesium alloy) to manufacture the middle plate. The low-density alloy material can be, for example, magnesium alloy. However, magnesium alloy has unstable chemical properties and poor corrosion resistance. In addition, the potential difference between magnesium alloy and the material used in the hinge mechanism (e.g., stainless steel) is large, which leads to galvanic corrosion between the middle plate and the hinge mechanism. The galvanic corrosion is relatively severe, producing a large number of corrosion products. These corrosion products accumulate at the position where the middle plate and the hinge mechanism meet, which can easily cause the hinge mechanism to become stuck and the screen to be pushed up and fail. These problems affect the user experience. If a chemically stable alloy material (e.g., aluminum alloy) is used to manufacture the middle plate in order to reduce the galvanic corrosion between the hinge mechanism and the middle plate, the weight of the fuselage may increase due to the high material density, which is not conducive to the lightweight and thin fuselage.

[0004] Therefore, the middle plate of foldable electronic devices in the existing technology is limited to a single material and cannot take into account multiple performances. For example, it is difficult to achieve stable chemical properties while reducing the weight of the body, which affects the consumer's usage experience.

[0005] Summary of the Invention

[0006] The embodiments of the present application provide a shell of a foldable electronic device and a foldable electronic device, which solves the problem in the prior art that the middle plate of the foldable electronic device is limited to a single material, making it difficult to achieve stable chemical properties while reducing the weight of the body, thus affecting the consumer's usage experience.

[0007] An embodiment of the present application provides a housing for a foldable electronic device, including a middle plate having a hinge accommodating area and a non-hinge accommodating area, wherein the hinge accommodating area is used to accommodate and install a hinge mechanism of the foldable electronic device.

[0008] The middle plate includes a first middle plate and a second middle plate connected to each other, at least a portion of the first middle plate constitutes at least a portion of the non-rotating shaft accommodating area, at least a portion of the second middle plate constitutes at least a portion of the rotating shaft accommodating area, and the material of the first middle plate is different from the material of the second middle plate.

[0009] The shell provided in the present application comprises a middle plate portion composed of a first middle plate and a second middle plate made of different materials. The first middle plate and the second middle plate cooperate with each other to form a shaft accommodating area and a non-shaft accommodating area on the middle plate. The shaft accommodating area is mainly used to accommodate and install the shaft of the foldable electronic device, and the non-shaft accommodating area is mainly used to support and protect the internal components of the foldable electronic device. At least part of the first middle plate constitutes at least part of the non-shaft accommodating area, and at least part of the second middle plate constitutes at least part of the shaft accommodating area. It can be understood that the shaft accommodating area is mainly composed of the second middle plate, and the non-shaft accommodating area is mainly composed of the first middle plate.

[0010] Since the first middle plate and the second middle plate adopt a split structure and use different materials, the diversity of the middle plate materials is improved, the selection is more flexible, and it is conducive to achieving a balance between the physical and chemical properties of the middle plate. For example, the contact area between the second middle plate and the rotating shaft mechanism is large, and a material with relatively stable chemical properties can be selected, or the first middle plate can be selected according to the material of the rotating shaft mechanism to reduce the risk of galvanic corrosion between the first middle plate and the rotating shaft mechanism. The contact area between the first middle plate and the rotating shaft mechanism is small, so the main focus can be on physical properties, and lightweight materials with low density can be selected to reduce the weight of the fuselage. Therefore, the material selection of the shell provided by this application is more flexible, and it can achieve stable chemical properties while reducing the weight of the fuselage, thereby improving the consumer's user experience.

[0011] In some embodiments, a portion of the first middle plate constitutes the entire non-rotating shaft accommodating area, and the remaining portion of the first middle plate and the entire second middle plate together constitute the entire rotating shaft accommodating area. Alternatively, the entire first middle plate constitutes the entire non-rotating shaft accommodating area, and the entire second middle plate constitutes the entire rotating shaft accommodating area.

[0012] In some embodiments, the first middle plate includes a first support plate and a first side wall, the first support plate has a first surface and a second surface arranged opposite to each other along its thickness direction, the first side wall is connected to a side edge of the first support plate and protrudes from the second surface of the first support plate; the second middle plate includes a second support plate and a second side wall, the second support plate has a first surface and a second surface arranged opposite to each other along its thickness direction, the second side wall is connected to a side edge of the second support plate and protrudes from the first surface of the second support plate.

[0013] The second side wall is connected to the first side wall, the second support plate is located on the outside of one side edge of the first support plate, and is spaced apart from the first support plate in the thickness direction of the middle plate, and the surface of the second support plate facing the first support plate is the first surface of the second support plate.

[0014] Furthermore, the first support plate as a whole constitutes the entire area of ​​the non-rotating shaft accommodating area, and the second support plate and the second side wall and the first side wall as a whole constitute at least a part of the area of ​​the rotating shaft accommodating area, wherein the second support plate constitutes the bottom plate of the rotating shaft accommodating area, and the first side wall and the second side wall together constitute the side walls of the rotating shaft accommodating area, and together with the second support plate, form a space for accommodating the rotating shaft mechanism.

[0015] With the above structure, the first and second support plates are separated by the side walls of the hinge accommodating area. The hinge mechanism of the foldable electronic device contacts only the bottom plate and side walls of the hinge accommodating area, not the first support plate. This prevents galvanic corrosion between the hinge mechanism and the first support plate, reduces the risk of the first support plate being unable to support and protect internal components after corrosion, and avoids the accumulation of corrosion products, preventing screen failure. The side walls of the hinge accommodating area are composed of the first and second side walls. Compared to a solution in which the second side walls of the second middle plate form the side walls of the hinge accommodating area, this structure can utilize the connection structure between the first and second side walls to firmly connect the first and second middle plates. Compared to a solution in which the first side walls of the first middle plate form the side walls of the hinge accommodating area, this structure can reduce the contact area between the hinge mechanism and the first side wall, weakening the tendency of galvanic corrosion between the first side wall and the hinge mechanism, and reducing the risk of hinge jamming.

[0016] In some embodiments, a limiting structure is provided at the location where the second side wall meets the first side wall. The limiting structure is configured to relatively fix the first and second middle plates. Since there is no bonding force between the material surfaces of the first and second middle plates, the limiting structure is required for connection and fixation.

[0017] In some embodiments, the limiting structure includes at least one snap-fit ​​structure, each of which includes a slot and a boss that engages within the slot, with one of the slot and the boss located on the first side wall of the middle plate, and the other located on the second side wall of the middle plate. The boss of the snap-fit ​​structure engages within the slot, thereby limiting relative movement between the first and second middle plates.

[0018] In some embodiments, in each snap-fit ​​structure, the slot is formed by being recessed from a side of the first sidewall away from the first support plate toward the interior of the first sidewall, and the boss is formed by extending outward from a side of the second sidewall away from the second support plate. That is, the slot is located on the first sidewall, and the boss is located on the second sidewall.

[0019] In some embodiments, at least a portion of at least one snap-fit ​​structure is configured as a dovetail groove structure. In each dovetail groove structure, the slot is configured as a dovetail groove, with two side surfaces of the dovetail groove facing each other along the length of the middle plate, and the width of the dovetail groove gradually increases from the slot opening to the slot bottom. The boss is configured to match the shape of the dovetail groove to restrict relative movement between the first and second middle plates in the length and width directions of the middle plates. The dovetail groove reduces the width of the slot opening, making it difficult for the boss to disengage from the slot along the width direction of the middle plate, thereby improving the reliability of the snap connection.

[0020] In some embodiments, in each dovetail groove structure, the boss has a first end face and a second end face arranged opposite to each other in the thickness direction of the middle plate, and the second end face is arranged toward the second support plate. The first end face and / or the second end face in at least part of the dovetail groove structure are configured as an inclined surface inclined relative to the first plane, and the surface in the dovetail groove that is arranged opposite to the inclined surface of the boss is configured as a matching inclined surface to limit the relative movement of the first middle plate and the second middle plate in the width direction of the middle plate, wherein the first plane is perpendicular to the thickness direction of the middle plate.

[0021] In some embodiments, at least a portion of at least one snap-fit ​​structure is configured as an inverted structure. In each inverted structure, the boss has a first end face and a second end face that are arranged opposite to each other in the thickness direction of the middle plate, and the second end face is arranged toward the second support plate. The first end face and / or the second end face are configured as an inclined surface inclined relative to the second plane, and the surface in the snap-fit ​​groove that is arranged opposite to the inclined surface of the boss is configured as a matching inclined surface to limit the relative movement of the first middle plate and the second middle plate in the width direction of the middle plate, wherein the second plane is perpendicular to the thickness direction of the middle plate.

[0022] With this solution, the boss and the slot are engaged by inclined surfaces, and both the inclined surfaces on the boss and the slot are inclined relative to the first plane or the second plane. When the first and second middle plates tend to separate from each other, the inclined surfaces between them counteract each other. The interaction force between the inclined surfaces can be decomposed into a force along the thickness direction of the middle plates and a force along the width direction of the middle plates. The force along the width direction of the middle plates can prevent the first and second middle plates from separating from each other.

[0023] In some embodiments, the at least one snap-fit ​​structure is a plurality of snap-fit ​​structures. The use of multiple snap-fit ​​structures reduces the risk of the first and second mid-plates being separated due to failure of a snap-fit ​​structure, thereby improving the reliability of the connection between the first and second mid-plates.

[0024] In some embodiments, the plurality of snap structures form at least one row of snap structures, each row of which includes at least two snap structures spaced apart along the length of the midplate. This arrangement allows for orderly arrangement of the snap structures, facilitating fabrication and ensuring uniform force across the interface between the first and second side walls, thereby enhancing the strength of the connection.

[0025] In some embodiments, the at least one row of snap structures is comprised of two rows of snap structures, and the two rows of snap structures are spaced apart in the thickness direction of the middle plate. It can be understood that the snap grooves do not extend through the first side wall in the thickness direction of the middle plate, and thus the snap structures can restrict relative movement between the first and second middle plates in the thickness direction of the middle plate.

[0026] In some embodiments, one of the two rows of snap structures is arranged on the top surface of the side wall of the hinge accommodating area, and the other row of snap structures is arranged on the bottom surface of the side wall of the hinge accommodating area, wherein the top surface of the side wall of the hinge accommodating area is connected to the first surface of the first support plate, and the bottom surface of the side wall of the hinge accommodating area is connected to the second surface of the second support plate, thereby improving the flatness of the surface of the foldable electronic device and enhancing the consumer's usage experience.

[0027] In some embodiments, the limiting structure includes at least one buckling structure, and each of the at least one buckling structure includes a buckling structure and a buckling groove that buckle with each other.

[0028] The snap-fit ​​structure is formed by extending outward from a side surface of the second side wall away from the second support plate, and includes a cantilever and two connecting arms spaced apart along the length direction of the cantilever. The cantilever is spaced apart relative to the second side wall. One end of each of the two connecting arms is connected to the cantilever, and the other end of each connecting arm is connected to the second side wall. The snap-fit ​​groove is formed on the first side wall and is configured as a groove structure that matches the shape of the snap-fit ​​structure.

[0029] The snap-fit ​​structure comprises a top surface and a bottom surface disposed opposite each other along the thickness direction of the middle plate, and a side surface connecting the top and bottom surfaces and facing away from the second side wall. After assembly, the top surface of the snap-fit ​​structure is coplanar with the top surface of the first support plate, and the bottom and side surfaces of the snap-fit ​​structure abut against the snap-fit ​​groove, restricting movement of the second middle plate in the thickness direction of the middle plate toward the second support plate and in the width direction of the middle plate toward the first side wall. The protruding portion of the snap-fit ​​groove extends into the gap between the two connecting arms, restricting relative movement of the first and second middle plates in the width direction of the middle plate.

[0030] In some embodiments, the second support plate has multiple mounting holes. Fasteners are inserted through each of the multiple mounting holes to secure and removably connect the second support plate to the pivot mechanism. The axes of the multiple mounting holes are not coplanar. The fasteners provide a secure connection between the second support plate and the pivot mechanism, allowing for flexible removable assembly and facilitate replacement and repair of the structural components.

[0031] In some embodiments, an accommodating space is provided on the second middle plate at a position corresponding to at least some of the multiple mounting holes, and each accommodating space is formed by being recessed into the interior of the second support plate along the width direction of the middle plate from the second side wall toward a side surface of the first side wall, and is connected to the corresponding mounting hole.

[0032] A protruding reinforcement plate corresponding to each accommodating space is provided on one side surface of the first side wall facing the second side wall. The reinforcement plate extends into the corresponding accommodating space and is provided with a connecting hole aligned with the corresponding mounting hole. Fasteners are passed through each connecting hole and the corresponding mounting hole to fix the second support plate and the reinforcement plate and detachably connect them to the rotating shaft mechanism.

[0033] By adopting the above solution, the second support plate and the reinforcement plate of the first middle plate are connected by fasteners, the connection position of the first middle plate and the second middle plate is increased, and on the basis of the limiting structure on the first side wall and the second side wall, the connection structural strength of the first middle plate and the second middle plate is further improved.

[0034] In some embodiments, the reinforcing plate is entirely embedded in the interior of the second supporting plate.

[0035] In some embodiments, the first mid-plate further includes at least one extension, each of the at least one extension extending from a side of the first sidewall facing away from the first support plate toward the second support plate. A notch is provided at a location on the second mid-plate corresponding to each extension, the extension being located within the notch. The extension has a first surface and a second surface disposed opposite each other along its thickness, the first surface of the extension being in contact with the first surface of the second support plate, and the second surface of the extension being in contact with the second surface of the second support plate. Together, the at least one extension and the second support plate form the bottom plate of the shaft accommodation area. The extension is used to achieve electrical connection between the first mid-plate and the shaft.

[0036] In some embodiments, each extension portion is provided with a fixing hole and a spring clip mounting slot. Fasteners are inserted through the fixing holes to secure and removably connect the extension portion to the rotating shaft mechanism. An annular insulating film surrounding the fixing hole is affixed to the outer periphery of the fixing hole. The insulating film is non-conductive and prevents galvanic corrosion in the covered area. A spring clip is mounted in the spring clip mounting slot, abutting the rotating shaft mechanism to achieve electrical connection between the first midplate and the rotating shaft mechanism. The inner wall of the spring clip mounting slot is provided with an annular foam surrounding the spring clip. The annular foam acts as a waterproof barrier, preventing galvanic corrosion by preventing electrolyte from entering the spring clip mounting slot.

[0037] In some embodiments, an escape space is provided between the first mid-plane and the second mid-plane for the signal line to pass through.

[0038] In some embodiments, the first middle plate is an integral structure made of an alloy material, and the second middle plate is an integral structure made of an alloy material or plastic.

[0039] In some embodiments, when the first middle plate and the second middle plate are both made of an alloy material and are an integral structure, the density of the first middle plate is less than the density of the second middle plate.

[0040] The rotating shaft mechanism has a matching component in contact with the second middle plate. The material of the matching component is an alloy. The absolute value of the potential difference between the alloy material of the matching component and the alloy material of the second middle plate is smaller than the absolute value of the potential difference between the alloy material of the matching component and the alloy material of the first middle plate.

[0041] The greater the potential difference between the two metals, the greater the tendency for galvanic corrosion. The above solution can reduce the risk of galvanic corrosion between the shaft mechanism and the first mid-plate while reducing the overall weight of the machine.

[0042] In some embodiments, when both the first and second middle plates are integrally formed from alloy materials, the first middle plate is made of a magnesium alloy, and the second middle plate is made of an aluminum alloy. The shaft mechanism is typically made of stainless steel. The potential difference between the aluminum alloy and the stainless steel shaft mechanism is smaller than that between the magnesium alloy and the stainless steel shaft mechanism. The density of the magnesium alloy is lower than that of the aluminum alloy. This structure reduces the contact area between the magnesium alloy and the shaft mechanism, controlling galvanic corrosion within a certain range while also reducing the overall weight of the device.

[0043] The embodiments of the present application also provide a foldable electronic device, including a hinge mechanism, a first shell and a second shell arranged on both sides of the hinge mechanism, wherein the first shell and the second shell are rotatably connected by the hinge mechanism so that the first shell and the second shell can be relatively unfolded or relatively folded. At least one of the first shell and the second shell adopts the shell provided by any of the above embodiments. The foldable electronic device provided by the present application can reduce or even eliminate the risk of galvanic corrosion while achieving weight reduction of the entire device, thereby reducing the risk of hinge jamming and screen failure, increasing the life of the foldable electronic device, and improving the user experience.

[0044] In some embodiments, each of the first shell and the second shell adopts the shell provided by any of the above embodiments.

[0045] In some embodiments, the pivot mechanism includes a base, a first pivot arm and a second pivot arm arranged on both sides of the base, one end of the first pivot arm is rotatably connected to one side of the base, and the other end is connected to the pivot accommodating area of ​​the middle plate of the first shell through a first connecting bracket, one end of the second pivot arm is rotatably connected to the other side of the base, and the other end is connected to the pivot accommodating area of ​​the middle plate of the second shell through a second connecting bracket to realize the combination of the pivot area and the middle plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] FIG1 is a schematic structural diagram of a housing of a foldable electronic device in some embodiments;

[0047] FIG2 is a schematic diagram of the cooperation between the housing and the hinge mechanism of a foldable electronic device in some embodiments;

[0048] FIG3 is a schematic diagram of the exploded structure of a foldable electronic device according to an embodiment of the present application;

[0049] FIG4 a is a schematic structural diagram of a foldable electronic device in an open state according to an embodiment of the present application;

[0050] FIG4 b is a schematic structural diagram of a foldable electronic device in a folded state according to an embodiment of the present application;

[0051] FIG4c is a schematic structural diagram of a foldable electronic device during a folding process according to an embodiment of the present application;

[0052] FIG5 is a schematic diagram illustrating the cooperation between the hinge mechanism and the housing of the foldable electronic device according to an embodiment of the present application;

[0053] FIG6 is a schematic diagram of the principle structure of the housing of the foldable electronic device according to an embodiment of the present application;

[0054] FIG7 is a schematic diagram of the principle structure of the cooperation between the housing and the hinge mechanism of the foldable electronic device according to an embodiment of the present application;

[0055] FIG8 a is a schematic diagram of the front structural view of the housing of the foldable electronic device according to an embodiment of the present application;

[0056] FIG8 b is a schematic diagram of the rear structural view of the housing of the foldable electronic device according to an embodiment of the present application;

[0057] FIG9 is a cross-sectional view taken along line II in FIG8a;

[0058] FIG10 is a schematic structural diagram of a first middle plate in a housing of a foldable electronic device according to an embodiment of the present application;

[0059] FIG11 is a schematic structural diagram of a second middle plate in a housing of a foldable electronic device according to an embodiment of the present application;

[0060] 12a-12c are schematic diagrams of the structure of a dovetail groove structure in the housing of a foldable electronic device according to an embodiment of the present application;

[0061] 13a-13c are schematic diagrams of the structure of the inverted structure in the housing of the foldable electronic device according to an embodiment of the present application;

[0062] 14a-14d are schematic diagrams of the structure of the buckling structure in the housing of the foldable electronic device according to an embodiment of the present application;

[0063] FIG15 is a schematic diagram showing the principle of connection between the housing and the hinge mechanism of the foldable electronic device according to an embodiment of the present application;

[0064] FIG16a is a schematic diagram of the cross-sectional structure taken along the EE line in FIG11;

[0065] FIG16 b is a schematic structural diagram of a reinforcing plate of a first middle plate in a housing of a foldable electronic device according to an embodiment of the present application;

[0066] FIG17 is a schematic structural diagram of an extension portion of the first middle plate in the housing of a foldable electronic device according to an embodiment of the present application.

[0067] Description of reference numerals:

[0068] Some solutions: 100', shell; 1', middle plate; 200', shaft mechanism.

[0069] This application: 100, foldable electronic device; 10, housing assembly; 20, hinge mechanism; 201, first rotating arm; 202, first connecting bracket; 203, base; 30, screen; 301, first portion; 302, second portion; 303, foldable portion; 101, first housing; 102, second housing; 10x, housing; 110, middle plate; 120, frame; A, hinge accommodating area; B, non-hinge accommodating area; 1, first middle plate; 11, first side wall; 11a, inner wall surface; 11b, outer wall surface; 11c, upper surface; 11d, lower surface; 12, first support plate; 12a, first surface; 12b, second surface; 2, second middle plate; 21, second side wall; 21a, inner wall surface; 21b, outer wall surface; 21c, upper surface; 21d, lower surface; 22. Second support plate; 22a. First surface; 22b. Second surface; 3. Snap-fit ​​structure; 31. Slot; 32. Boss; 33. First end surface; 34. Second end surface; 3a. Dovetail groove structure; 31a. Dovetail groove; 32a. Boss; 33a. First end surface; 34a. Second end surface; M. First plane; 3b. Undercut structure; 31b. Slot; 32b. Boss; 33b. First end surface; 34b. Second end surface; N. Second plane; 4. Snap-fit ​​structure; 41. Snap-fit ​​structure; 42. Snap-fit ​​groove; 411. Cantilever; 412. Connecting arm; 41a. Top surface; 41b. Bottom surface; 41c. Side surface; 51. Mounting hole; 52. Connecting hole; 53. Fixing hole; 61. Accommodating space; 62. Reinforcement plate; 71, extension; 71a, first surface; 71b, second surface; 72, notch; 8, spring clip mounting slot; 9, avoidance space; Z, thickness direction of the middle plate; X, width direction of the middle plate; Y, length direction of the middle plate. DETAILED DESCRIPTION

[0070] The following specific embodiments illustrate the implementation of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Although the description of the present application will be combined with some embodiments, this does not mean that the features of this application are limited to the implementation. On the contrary, the purpose of introducing the application in combination with the implementation is to cover other options or modifications that may be extended based on the claims of the present application. In order to provide an in-depth understanding of the present application, some descriptions will contain many specific details. The present application can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present application, some specific details will be omitted in the description. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other unless there is a conflict.

[0071] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or mutual communication; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0072] In the description of this application, it should be understood that the terms "upper," "lower," "side," "inner," "outer," "top," and "bottom" indicate orientations or positional relationships based on installation. These terms are used solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0073] In the description of this application, limitations such as collinearity, coaxiality, coplanarity, symmetry, parallelism, and perpendicularity are all based on the current technological level, rather than being absolutely strict definitions in a mathematical sense.

[0074] It should also be noted that, in the embodiments of the present application, the same reference numerals are used to represent the same component or the same part. For the same parts in the embodiments of the present application, the figure may only mark one of the parts or parts as an example. It should be understood that the reference numerals are also applicable to other identical parts or parts.

[0075] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0076] Foldable electronic devices typically include a housing assembly and a display screen, with the housing assembly used to support the display screen. The housing assembly comprises two housings and a hinge mechanism rotatably connected between the two housings. Each housing comprises a center plate and an outer frame surrounding the center plate. The hinge mechanism is connected to the center plates of the two housings on either side. In the industry, the center plates of foldable electronic devices are often integrated structures made of a single alloy material.

[0077] Please refer to Figures 1 and 2. Figure 1 is a structural schematic diagram of the shell of a foldable electronic device in some solutions; Figure 2 is a schematic diagram of the cooperation between the shell and the hinge mechanism of the foldable electronic device in some solutions.

[0078] As shown in Figures 1-2, the middle plate 1' of the housing 100' of a foldable electronic device is a one-piece structure made of an alloy material. That is, the entire middle plate 1' is made of a single alloy material. Furthermore, the hinge mechanism 200' of the foldable electronic device is mounted on the middle plate 1', making extensive contact with the middle plate 1'. Different alloys have different properties. Limited by a single material, this one-piece middle plate 1' cannot achieve multiple properties. For example, to reduce the weight of the device, some manufacturers use low-density alloys (e.g., magnesium alloys) to manufacture the middle plate 1'. Low-density alloys can be magnesium alloys, for example. However, magnesium alloys are chemically unstable and have poor corrosion resistance. Furthermore, the potential difference between magnesium alloys and the material used for the hinge mechanism (e.g., stainless steel) is large, leading to galvanic corrosion between the middle plate and the hinge mechanism. This corrosion is severe, producing a large amount of corrosion products. These corrosion products accumulate at the point where the middle plate and the hinge mechanism meet, easily causing the hinge mechanism to jam and the screen to become pushed up, leading to failure. These problems affect the user experience. If a chemically stable alloy material (e.g., aluminum alloy) is used to make the middle plate in order to reduce galvanic corrosion between the hinge mechanism and the middle plate, the weight of the fuselage may increase due to the high density of the material, which is not conducive to making the fuselage lighter and thinner.

[0079] Therefore, the shell of foldable electronic devices is limited to a single material and cannot take into account multiple performances. For example, it is difficult to achieve stable chemical properties while reducing the weight of the body, which affects consumers' usage experience.

[0080] To solve the above problems, the present application provides a shell for a foldable electronic device and a foldable electronic device. By setting the middle plate of the shell to a first middle plate and a second middle plate made of different materials, the diversity of the middle plate material is improved, and the selection is more flexible, which is conducive to achieving a balance between the physical properties and chemical properties of the middle plate, and can take into account multiple performances. For example, it can achieve stable chemical properties while reducing the weight of the fuselage, thereby improving the consumer's user experience.

[0081] The foldable electronic devices provided in the embodiments of this application may include foldable screen mobile phones, foldable computers, foldable e-readers, foldable displays, wearable devices, in-vehicle devices, and the like. The embodiments of this application do not limit the specific types of foldable electronic devices. The following describes the structure of a foldable electronic device using a foldable screen mobile phone as an example.

[0082] Please refer to Figures 3-4c, Figure 3 is a schematic diagram of the decomposed structure of the foldable electronic device according to an embodiment of the present application; Figure 4a is a schematic diagram of the structure of the foldable electronic device according to an embodiment of the present application in an open state; Figure 4b is a schematic diagram of the structure of the foldable electronic device according to an embodiment of the present application in a folded state; Figure 4c is a schematic diagram of the structure of the foldable electronic device according to an embodiment of the present application during the folding process.

[0083] As shown in Figures 3-4c, the foldable electronic device 100 includes a first housing 101, a second housing 102, and a hinge mechanism 20. The first housing 101 and the second housing 102 are rotatably connected by the hinge mechanism 20 to enable the foldable electronic device 100 to be opened and folded. Each housing 10x of the first housing 101 and the second housing 102 serves as the frame portion of the foldable electronic device 100, used to support and protect the internal components of the foldable electronic device 100. The first housing 101, the second housing 102, and the hinge mechanism 20 together constitute the housing assembly 10.

[0084] Those skilled in the art will appreciate that the specific structures of the first and second housings 101, 102 are not limited. In one embodiment, both the first and second housings 101, 102 may include a center plate 110 and an outer frame 120 disposed around the periphery of the center plate. The center plate 110 is used to mount circuit boards and support electronic components. The specific structures of the housings will be described in detail later.

[0085] It should be noted that the foldable electronic device 100 has an open state and a folded state. The first shell 101 and the second shell 102 can both rotate around the hinge mechanism 20, so that the first shell 101 and the second shell 102 rotate relative to each other. When the first shell 101 and the second shell 102 are relatively rotated to the same plane, the foldable electronic device is in the open state shown in Figure 4a, and the first shell 101 and the second shell 102 are opened at a certain angle. In an example scenario, when the foldable electronic device 100 is in the open state, the angle between the first shell 101 and the second shell 102 is 180°. It will be understood by those skilled in the art that the angle between the first shell 101 and the second shell 102 can be 90°, 120°, 210°, etc., and this application does not limit this.

[0086] Furthermore, when the first shell 101 and the second shell 102 are rotated relative to each other to overlap each other, the foldable electronic device 100 is in the folded state shown in FIG4 b , and the angle between the first shell 101 and the second shell 102 can be approximately regarded as 0°.

[0087] It should be noted that the angles illustrated in this application are all allowed to have slight deviations. For example, when the foldable electronic device 100 is in the open state, its open angle can be 180°, or approximately 180°, such as 170°, 175°, 185°, or 190°, and the same applies to other angles in the following text.

[0088] As shown in Figure 4c, the foldable electronic device 100 can also be in a state between the folded state and the open state. For example, the first housing 101 and the second housing 102 can also form a certain angle, allowing the foldable electronic device 100 to switch to a desktop usage mode. In this case, the first housing 101 can be placed on a surface such as a desk or storage table, ensuring that the foldable electronic device 100 is placed stably.

[0089] In one embodiment, the foldable electronic device further includes a screen 30 and a back cover, which are arranged on opposite sides of the housing assembly 10 in the thickness direction of the foldable electronic device 100. The back cover is used to protect the internal structure of the foldable electronic device 100 and is also called a battery cover. The screen 30 is used to present images and realize human-computer interaction. Optionally, the screen 30 can be an organic light-emitting diode (OLED) display, an active-matrix organic light-emitting diode or active-matrix organic light-emitting diode (AMOLED) display, a mini organic light-emitting diode (MLED) display, a micro organic light-emitting diode (MLED) display, a micro organic light-emitting diode (MLED) display, a quantum dot light-emitting diode (QLED) display, etc., and this application does not limit this.

[0090] Furthermore, the screen 30 includes a first portion 301, a second portion 302, and a foldable portion 303. The first portion 301 is connected to the first housing 101, the second portion 302 is connected to the second housing 102, and the foldable portion 303 is located between the first portion 301 and the second portion 302 and is arranged corresponding to the hinge mechanism 20. During use of the foldable electronic device 100, the first portion 301 and the second portion 302 always remain in a planar state, while the foldable portion 303 can bend. When the first housing 101 and the second housing 102 rotate relative to each other under the drive of the hinge mechanism 20, the first portion 301 and the second portion 302 of the screen 30 also rotate relative to each other under the drive of the first housing 101 and the second housing 102, thereby realizing the opening and folding of the screen 30.

[0091] Optionally, the screen 30 can be a flexible screen that is foldable as a whole, or the screen 30 can also be a combination of a rigid screen and a flexible screen, for example, the foldable part 303 is a foldable flexible screen, the first part 301 and the second part 302 are rigid screens, etc. This application does not limit this.

[0092] It should be noted that the foldable electronic device 100 provided in the present application can be an outward-folding electronic device or an inward-folding electronic device. As shown in Figures 3 to 4c, in one embodiment, the foldable electronic device 100 is an inward-folding electronic device. When the inward-folding electronic device is in a folded state, the shell assembly 10 surrounds the outside of the screen 30. Or it can be understood that the first part 301 and the second part 302 of the screen 30 are arranged facing each other. When the first shell 101 and the second shell 102 are rotated relative to each other to be coplanar, the foldable electronic device 100 is in the open state shown in Figure 4a. At this time, the angle between the first shell 101 and the second shell 102 is 180°, so that the foldable electronic device 100 can achieve a large-screen display, which can provide users with a wider field of view, provide richer information, and bring users a better user experience. When the first shell 101 and the second shell 102 are rotated relative to each other to overlap each other, the foldable electronic device 100 is in the folded state shown in Figure 4b. At this time, the angle between the first shell 101 and the second shell 102 can be approximately regarded as 0°. At this time, the foldable electronic device 100 has a smaller volume, which is convenient for users to carry it in a storage box. The screen 30 is inside, and the shell assembly 10 can protect the screen 30.

[0093] Optionally, the foldable electronic device 100 may further include: a processor, a universal serial bus (USB) interface, a charging management module, a power management module, a battery, a microphone, a motor, a speaker, a mobile communication module, an antenna, a wireless communication module, an audio module, a headphone jack, a sensor module, a button, a camera, and a user identification module. It should be understood that the foldable electronic device 100 shown in Figures 3-4c is only an example of a foldable electronic device and does not constitute a specific limitation on the foldable electronic device of the embodiment of the present application. The foldable electronic device may have more or fewer components than shown in the figures.

[0094] Those skilled in the art will appreciate that the specific structure of the hinge mechanism 20 is not limited. It should be understood that the hinge mechanism 20 of the foldable electronic device 100 is mounted on the first housing 101 and the second housing 102, and has a large contact area with the first housing 101 and the second housing 102. The following, in conjunction with the accompanying drawings, exemplifies possible structures of the hinge mechanism 20 and the locations of contact between the hinge mechanism 20 and the first housing 101 and the second housing 102.

[0095] Please refer to FIG5 , which is a schematic diagram of the cooperation between the hinge mechanism and the housing of the foldable electronic device according to an embodiment of the present application.

[0096] It should be noted that the hinge mechanism 20 can adopt a symmetrical design or an asymmetrical design, and this application does not impose any restrictions on this. The two sides of the hinge mechanism 20 are respectively connected to the first shell 101 and the second shell 102, and the first shell 101 and the second shell 102 can also adopt a symmetrical or asymmetrical design. In one embodiment, the shell assembly 10 as a whole adopts a symmetrical design, that is, the two sides of the hinge mechanism 20 are symmetrical, and the first shell 101 and the second shell 102 are also symmetrical. The drawings provided in this application only show half of the symmetrical structure, that is, the shell 10x in Figure 5 can be the first shell 101 or the second shell 102. The first shell 101 is used as an example in the figure, and the hinge mechanism 20 also only shows the partial structure that cooperates with the first shell 101.

[0097] As shown in Figure 5, in one embodiment, the hinge mechanism 20 includes a base 203, a first rotating arm 201 and a second rotating arm (not shown in the figure) arranged on both sides of the base 203, one end of the first rotating arm 201 is rotatably connected to one side of the base 203, and the other end is connected to the middle plate 110 of the first shell 101 through a first connecting bracket 202, one end of the second rotating arm is rotatably connected to the other side of the base 203, and the other end is connected to the middle plate 110 of the second shell 102 through a second connecting bracket (not shown in the figure) to realize the combination of the hinge mechanism 20 and the middle plate 110. The middle plate 110 of the first housing 101 and the middle plate 110 of the second housing 102 are both provided with a shaft accommodating area A. The first rotating arm 201 is connected to the shaft accommodating area A of the middle plate 110 of the first housing 101, and the second rotating arm is also connected to the shaft accommodating area A of the middle plate 110 of the second housing 102. The area of ​​the middle plate 110 other than the shaft accommodating area A is the non-shaft accommodating area B. It can be understood that the shaft accommodating area A on each middle plate is the location where the shaft mechanism 20 contacts the housing.

[0098] It should be noted that the first shell 101 and the second shell 102 can adopt a symmetrical design or an asymmetrical design. The structure of a shell 10x is described in detail below with reference to the accompanying drawings. It should be noted that the other shell can also adopt the structure described below.

[0099] Please refer to Figures 6-7. Figure 6 is a schematic diagram of the principle structure of the shell of the foldable electronic device according to an embodiment of the present application; Figure 7 is a schematic diagram of the principle structure of the shell and the rotating shaft mechanism of the foldable electronic device according to an embodiment of the present application.

[0100] As shown in Figures 3 to 4c and Figure 6, the shell 10x includes a middle plate 110 and a frame 120. The middle plate 110 has sufficient structural strength to resist bending and impact fracture, and is used to support and protect the internal components of the foldable electronic device 100. The frame 120 surrounds and connects to the outer peripheral side of the middle plate 110. The frame 120 can be a metal frame or a non-metallic frame (such as a plastic frame, a glass frame, etc.), and this application does not limit this. The frame 120 of the first shell 101 is connected and fixed to the first part 301, and / or the non-rotating axis accommodating area B of the first shell 101 can also be connected and fixed to the first part 301. The frame 120 of the second shell 102 is connected and fixed to the second part 302, and / or the non-rotating axis accommodating area B of the second shell 102 can also be connected and fixed to the second part 302, so that the first shell 101 and the second shell 102 can firmly support the screen 30.

[0101] Furthermore, the middle plate 110 has a hinge accommodating area A and a non-hinge accommodating area B. The hinge accommodating area A is used to accommodate and install the hinge mechanism 20 of the foldable electronic device 100, while the remaining area is the non-hinge accommodating area B. It can be understood that the hinge accommodating area A of the housing is provided on the middle plate 110, and the hinge mechanism 20 contacts the hinge accommodating area A on the middle plate 110, but does not contact the non-hinge accommodating area B.

[0102] Furthermore, the middle plate 110 includes a first middle plate 1 and a second middle plate 2 connected to each other, at least a portion of the first middle plate 1 constitutes at least a portion of the non-rotating shaft accommodating area B, and at least a portion of the second middle plate 2 constitutes at least a portion of the rotating shaft accommodating area A, and the material of the first middle plate 1 is different from the material of the second middle plate 2.

[0103] Alternatively, it can be understood that the middle plate 110 is composed of a first middle plate 1 and a second middle plate 2 made of different materials. The first middle plate 1 and the second middle plate 2 cooperate with each other to form a hinge accommodating area A and a non-hinge accommodating area B on the middle plate 110. The hinge accommodating area A is primarily used to accommodate and install the hinge mechanism 20 of the foldable electronic device 100, and the non-hinge accommodating area B is primarily used to support and protect the internal components of the foldable electronic device 100. At least part of the first middle plate 1 constitutes at least part of the non-hinge accommodating area B, and at least part of the second middle plate 2 constitutes at least part of the hinge accommodating area A. It can be understood that the hinge accommodating area A is primarily composed of the second middle plate 2, and the non-hinge accommodating area B is primarily composed of the first middle plate 1.

[0104] Since the first middle plate 1 and the second middle plate 2 adopt a split structure and use different materials, the diversity of the middle plate materials is improved, the selection is more flexible, and it is conducive to achieving a balance between the physical and chemical properties of the middle plate. For example, the contact area between the second middle plate 2 and the rotating shaft mechanism 20 is large, and a material with relatively stable chemical properties can be selected, or the first middle plate 1 can be selected according to the material of the rotating shaft mechanism to reduce the risk of galvanic corrosion between the first middle plate 1 and the rotating shaft mechanism 20. The contact area between the first middle plate 1 and the rotating shaft mechanism 20 is small, so the main focus can be on physical properties, and lightweight materials with low density can be selected to reduce the weight of the fuselage. Therefore, the shell material selection provided by this application is more flexible, and it can achieve stable chemical properties while reducing the weight of the fuselage, thereby improving the consumer's user experience.

[0105] Those skilled in the art will appreciate that the materials of the first middle plate 1 and the second middle plate 2 are not limited. For example, the first middle plate 1 and the second middle plate 2 can both be made of metal or plastic, and the specific design can be as needed. In one embodiment, the first middle plate 1 is a one-piece structure made of an alloy material, and the second middle plate 2 is a one-piece structure made of an alloy material or plastic.

[0106] Furthermore, the density of the first middle plate 1 is less than that of the second middle plate 2, so as to reduce the weight of the body of the foldable electronic device. In addition, the hinge mechanism 20 has a matching component (such as each rotating arm) in contact with the second middle plate 2, and the material of the matching component is an alloy, and the absolute value of the potential difference between the alloy material of the matching component and the alloy material of the second middle plate 2 is less than the absolute value of the potential difference between the alloy material of the matching component and the alloy material of the first middle plate 1. The greater the potential difference between the two metals, the greater the tendency of galvanic corrosion to occur between the two. A smaller potential difference can reduce the risk of galvanic corrosion. By adopting the above scheme, an alloy material with a low density and an alloy material with a small potential difference between the hinge mechanism and the middle plate 110 are combined. Compared with the middle plate using a certain alloy material, this structure can reduce the weight of the body while reducing the risk of galvanic corrosion between the hinge mechanism 20 and the middle plate 110.

[0107] It will be understood by those skilled in the art that the specific materials used for the first middle plate 1 and the second middle plate 2 are not limited. In one embodiment, the material of the first middle plate 1 can be a magnesium alloy. Magnesium alloy has the advantages of low density, high specific strength, and good heat dissipation performance. Magnesium is a light metal with a density of 1.74g / cm 3, which is about 2 / 3 of aluminum and 1 / 4 of steel, which is of great significance for achieving weight reduction of foldable devices. Under the same rigidity conditions, the strength of 1kg of magnesium alloy is approximately equal to 18kg of aluminum or 2kg of steel, which can effectively support and protect the internal components of foldable electronic devices. The high heat dissipation performance of magnesium alloy is also very suitable for foldable electronic devices with dense electronic components. However, the standard electrode potential of Mg is -2.36V, which is the most negative among industrial alloys, and the oxidation products of Mg are loose and porous, so Mg and its alloys have poor corrosion resistance, show high chemical and electrochemical activity, and are prone to galvanic corrosion with other metals. Therefore, the second middle plate with a large contact area with the hinge mechanism cannot be made of magnesium alloy material.

[0108] In one embodiment, the material of the second middle plate 2 can be an aluminum alloy. The electrode potential of aluminum is -1.66V. Most parts of the rotating shaft mechanism 20 are made of stainless steel. The electrode potential of iron is -0.44V. The potential difference between stainless steel and magnesium alloy is about 1.93V. Galvanic corrosion is likely to occur at the contact parts in environments such as salt spray and seaside. However, the potential difference between aluminum alloy and stainless steel is about 1.22V, which is smaller than the potential difference between magnesium alloy and stainless steel. Therefore, the tendency of galvanic corrosion between the aluminum alloy second middle plate 2 and the stainless steel rotating shaft mechanism 20 is relatively small. In other alternative embodiments, the material of the second middle plate 2 can also be other alloys. For example, the material of the second middle plate 2 can be a titanium alloy. The electrode potential of titanium is -1.63V, and the potential difference between it and stainless steel is about 1.19V, which is smaller than the potential difference between magnesium alloy and stainless steel. Therefore, the tendency of galvanic corrosion between the titanium alloy second middle plate 2 and the stainless steel rotating shaft mechanism 20 is relatively small. Alternatively, the material of the second middle plate 2 can be zinc alloy, the electrode potential of zinc is -0.76V, and the potential difference between zinc and stainless steel is about 0.32V, which is also smaller than the potential difference between magnesium alloy and stainless steel. This application does not limit the material of the second middle plate 2.

[0109] Those skilled in the art will appreciate that the size and location of the area of ​​the first middle plate 1 that constitutes the non-rotating shaft accommodating area B and the area of ​​the second middle plate 2 that constitutes the rotating shaft accommodating area A are not limited. For example, the rotating shaft accommodating area A can be composed of a portion of the first middle plate 1 and a portion of the second middle plate 2, and the non-rotating shaft accommodating area B can also be composed of a portion of the first middle plate 1 and a portion of the second middle plate 2. Alternatively, the rotating shaft accommodating area A can be composed solely of the second middle plate 2, and the area of ​​the non-rotating shaft accommodating area B can be composed solely of the first middle plate 1. In one embodiment, a portion of the first middle plate 1 constitutes all of the non-rotating shaft accommodating area B, while the remaining portion of the first middle plate 1 and the entire second middle plate 2 together constitute all of the rotating shaft accommodating area A. This can be understood as follows: the non-rotating shaft accommodating area B is composed entirely of the first middle plate 1, and the rotating shaft accommodating area A is composed of all of the second middle plate 2 and the area of ​​the first middle plate 1 excluding the non-rotating shaft accommodating area B. In other alternative embodiments, the entire first middle plate 1 may constitute all areas of the non-rotating shaft accommodating area B, and the entire second middle plate 2 may constitute all areas of the rotating shaft accommodating area A, which will not be listed one by one in this application.

[0110] Those skilled in the art will appreciate that the specific structure of the middle plate is not limited. The following exemplifies the structure of the middle plate of the present application with reference to the accompanying drawings.

[0111] Please refer to Figures 8a to 11, Figure 8a is a schematic diagram of the front view structure of the shell of the foldable electronic device according to an embodiment of the present application; Figure 8b is a schematic diagram of the back view structure of the shell of the foldable electronic device according to an embodiment of the present application; Figure 9 is a cross-sectional view taken along direction II in Figure 8a; Figure 10 is a schematic diagram of the structure of the first middle plate in the shell of the foldable electronic device according to an embodiment of the present application; Figure 11 is a schematic diagram of the structure of the second middle plate in the shell of the foldable electronic device according to an embodiment of the present application.

[0112] As shown in Figures 8a to 11, for ease of understanding, the figures illustrate the thickness direction Z, length direction Y, and width direction X of the middle plate. The thickness direction Z of the middle plate can be the thickness direction of the foldable electronic device, the length direction Y of the middle plate can be the length direction of the foldable electronic device, such as the extension direction of the rotating shaft in the rotating shaft mechanism, and the width direction X of the middle plate can be the width direction of the foldable electronic device. The thickness direction Z, length direction Y, and width direction X of the middle plate are mutually perpendicular.

[0113] In one embodiment, the first middle plate 1 includes a first side wall 11 and a first support plate 12, and the second middle plate 2 includes a second side wall 21 and a second support plate 22. The first support plate 12 has a first surface 12a and a second surface 12b disposed opposite to each other along the thickness direction Z of the middle plate. The first side wall 11 is connected to a side edge of the first support plate 12 and protrudes from the second surface 12b of the first support plate 12.

[0114] The first side wall 11 has an inner wall surface 11a facing the first support plate 12 and an outer wall surface 11b facing away from the first support plate 12, as well as an upper surface 11c and a lower surface 11d connected to the inner wall surface 11a and the outer wall surface 11b. The upper surface 11c and the lower surface 11b are arranged opposite to each other along the thickness direction Z of the middle plate. At the connection between the first side wall 11 and the first support plate 12, the upper surface 11c of the first side wall 11 and the first surface 12a of the first support plate 12 are on the same horizontal plane, that is, the upper surface 11c of the first side wall 11 and the first surface 12a of the first support plate 12 are flush.

[0115] Furthermore, the second support plate 22 has a first surface 22a and a second surface 22b disposed opposite each other along the thickness direction Z of the middle plate. The second sidewall 21 is connected to a side edge of the second support plate 22 and protrudes beyond the first surface 22a of the second support plate 22. The second sidewall 21 has an inner wall surface 21a facing the second support plate 22 and an outer wall surface 21b facing away from the second support plate 22, as well as an upper surface 21c and a lower surface 21d connected to the inner wall surface 21a and the outer wall surface 21b. The upper surface 21c and the lower surface 21d are disposed opposite each other along the thickness direction Z. At the junction of the second sidewall 21 and the second support plate 22, the lower surface 21d of the second sidewall 21 and the second surface 22b of the second support plate 22 are on the same horizontal plane, that is, the lower surface 21d of the second sidewall 21 and the second surface 22b of the second support plate 22 are flush.

[0116] Furthermore, the first side wall 11 is connected to the second side wall 21. The second support plate 22 is located outside a side edge of the first support plate 12 and is spaced apart from the first support plate 12 in the thickness direction Z. The surface of the first support plate 12 facing the second support plate 22 is the second surface 12b of the first support plate 12, and the surface of the second support plate 22 facing the first support plate 12 is the first surface 22a of the second support plate 22. The first support plate 12 as a whole constitutes all of the non-rotating shaft accommodating area B. The second support plate 22, the second side wall 21, and the first side wall 11 as a whole constitute at least part of the rotating shaft accommodating area A. The second support plate 22 constitutes the bottom plate of the rotating shaft accommodating area A. The entire second side wall 21 and a portion of the first side wall 11 together constitute the sidewalls of the rotating shaft accommodating area A, and together with the second support plate 22, they surround and form a space for accommodating the rotating shaft mechanism 20.

[0117] With this structure, the first support plate 12 and the second support plate 22 are separated by the side walls of the hinge accommodating area A. The hinge mechanism 20 of the foldable electronic device 100 contacts only the side walls and bottom wall of the hinge accommodating area A, not the first support plate 12. This prevents galvanic corrosion between the hinge mechanism 20 and the first support plate 12, and the risk of the first support plate 12 being unable to support and protect internal components after corrosion. It also avoids the problem of screen failure caused by the accumulation of corrosion products. The side walls of the hinge accommodating area A are composed of the first side wall 11 and the second side wall 21. The connection structure between the first side wall 11 and the second side wall 21 firmly connects the first middle plate 1 and the second middle plate 2 to prevent relative movement. This also reduces the contact area between the hinge mechanism 20 and the first side wall 11, reducing the tendency of galvanic corrosion between the first side wall 11 and the hinge mechanism 20, thereby reducing the risk of hinge jamming. In some alternative embodiments, due to limitations of installation space or internal structure, the entire second side wall 21 may independently constitute the side wall of the shaft accommodating area A, and this application does not impose any limitation on this.

[0118] In one embodiment, a limiting structure is provided at the location where the first side wall 11 and the second side wall 21 meet. The limiting structure is configured to relatively fix the first middle plate 1 and the second middle plate 2, thereby connecting and fixing the first middle plate 1 and the second middle plate 2 and limiting relative movement therebetween. This application does not limit the specific structure and limiting method of the limiting structure. The following exemplary embodiments illustrate possible structures in conjunction with the accompanying drawings.

[0119] Please refer to Figures 12a-14d, Figures 12a-12c are structural schematic diagrams of the dovetail groove structure in the shell of the foldable electronic device according to an embodiment of the present application; Figures 13a-13c are structural schematic diagrams of the inverted structure in the shell of the foldable electronic device according to an embodiment of the present application; Figures 14a-14d are structural schematic diagrams of the snap-fit ​​structure in the shell of the foldable electronic device according to an embodiment of the present application.

[0120] As shown in Figures 10-11 and 12a-14d, in one embodiment, the limiting structure includes at least one snap-fit ​​structure 3, through which the first middle plate 1 and the second middle plate 2 are snap-fitted and connected. Furthermore, each snap-fit ​​structure 3 includes a slot 31 and a boss 32 that snaps into the slot. The boss 32 snaps into the slot 31, thereby limiting the relative movement of the first middle plate 1 and the second middle plate 2. It should be noted that the specific number of snap-fit ​​structures 3 is not limited; for example, one, two, or more snap-fit ​​structures may be provided.

[0121] In one embodiment, multiple snap-fit ​​structures 3 are provided between the first mid-plane 1 and the second mid-plane 2. The use of multiple snap-fit ​​structures 3 reduces the risk of separation of the first mid-plane 1 and the second mid-plane 2 due to failure of any snap-fit ​​structure 3, thereby improving the reliability of the connection.

[0122] It should be noted that the present application does not limit the arrangement of the multiple snap structures 3. In one embodiment, the multiple snap structures 3 constitute at least one column of snap structures 3, and each column of snap structures 3 includes at least two snap structures 3 spaced apart in the longitudinal direction Y of the middle plate. This arrangement is convenient for processing and manufacturing, and can ensure that the joint surface of the first side wall 11 and the second side wall 21 is uniformly stressed in the longitudinal direction, prevent local deformation, and improve the strength of the connection. In one embodiment, the multiple snap structures 3 constitute two columns of snap structures, and the two columns of snap structures 3 are spaced apart in the thickness direction Z of the middle plate. It can be understood that each slot 31 does not pass through the first side wall 11 along the thickness direction Z of the middle plate. Therefore, the relative movement of the first middle plate 1 and the second middle plate 2 in the thickness direction Z of the middle plate can be limited. In addition, the two columns of snap structures 3 make the combination tighter, the surface of the electronic device smoother, and improve the consumer's user experience.

[0123] It should be noted that the positions of the two rows of snap structures 3 are not limited. In one embodiment, one of the two rows of snap structures 3 is disposed on the top surface of the side wall of the shaft accommodating area A, and the other row of snap structures 3 is disposed on the bottom surface of the side wall of the shaft accommodating area A, wherein the top surface of the side wall of the shaft accommodating area A is connected to the first surface 12a of the first support plate 12, and the bottom surface of the side wall of the shaft accommodating area A is connected to the second surface 22b of the second support plate 22. In combination with the structure of each snap structure 3, the boss 32 has a first end face 33 and a second end face 34 that are oppositely disposed along the thickness direction Z of the middle plate, with the first end face 33 facing away from the second support plate 22, and the second end face 34 facing the second support plate 22. The first end face 33 of the boss 32 in one row of snap-fit ​​structures 3 is on the same horizontal plane as the first surface 12a of the first support plate 12, and the second end face 34 of the boss 32 in another row of snap-fit ​​structures 3 is on the same horizontal plane as the second surface 22b of the second support plate 22, making the surface of the middle plate smoother and easier to process.

[0124] Those skilled in the art will appreciate that the specific locations of the slots 31 and bosses 32 in each snap structure 3 are not limited; one can be located on the first side wall 11 and the other on the second side wall 21. In one embodiment, the slot 31 is located on the first side wall 11, and the boss 32 is located on the second side wall 21. The slot 31 is formed by a depression extending from the outer wall surface 11b of the first side wall 11 away from the first support plate 12 toward the interior of the first side wall 11, and the boss 32 is formed by extending outward from the outer wall surface 21b of the second side wall 21 away from the second support plate 22 toward the first support plate 12. When the first and second middle plates 1 and 2 tend to separate from each other, the slots 31 and bosses 32 can abut against each other, thereby limiting relative movement of the first and second middle plates 1 and 2 in the longitudinal direction Y of the middle plates. They can also limit movement of the second middle plate 2 along the width direction X of the middle plates toward the first middle plate 1, preventing the first and second middle plates 1 and 2 from separating from each other.

[0125] Those skilled in the art will appreciate that the specific shape of the buckle structure 3 is not limited.

[0126] As shown in Figures 12a-12c, in one embodiment, at least a portion of the snap-fit ​​structure 3 is configured as a dovetail groove structure 3a. The specific number of dovetail groove structures 3a is not limited, and can be, for example, 8, 10, or 12. In each dovetail groove structure 3a, the snap-fit ​​groove 31 is configured as a dovetail groove 31a. The opening and bottom of the dovetail groove 31a are arranged opposite each other in the width direction X of the middle plate, and the two side surfaces connecting the opening and bottom are arranged opposite each other in the length direction Y of the middle plate. The width of the dovetail groove 31a gradually increases from the opening to the bottom. The boss 32a is configured to match the dovetail groove 31a. The dovetail groove 31a reduces the width of the snap-fit ​​groove 31 at its opening. In addition to functioning as a snap-fit ​​groove 31, it also restricts movement of the second middle plate 2 away from the first middle plate 1 along the width direction X of the middle plate, thereby improving the stability between the first and second middle plates 1 and 2.

[0127] In one embodiment, the boss 32a has a first end surface 33a and a second end surface 34a disposed opposite each other in its thickness direction Z. The second end surface 34a faces the second support plate 22. The first end surface 33a and / or the second end surface 34a in at least a portion of the dovetail groove structure 3a are configured as inclined surfaces relative to the first plane M. The surface of the dovetail groove 31a that opposes the inclined surface of the boss 32a is configured as a matching inclined surface. The first plane M is perpendicular to the thickness direction Z of the midplate.

[0128] As shown in Figures 13a-13c, in one embodiment, at least some of the snap-fit ​​structures 3 are configured as inverted snap-fit ​​structures 3b. In each inverted snap-fit ​​structure 3b, the boss 32b has a first end surface 33b and a second end surface 34b that are opposite to each other in the thickness direction Z of the midplate. The second end surface 34b faces the second support plate 22. Any one or more of the first end surface 33b and the second end surface 34b are configured as inclined surfaces relative to a second plane N. The surfaces of the snap-fit ​​groove 31b and the boss 32b that are opposite to the inclined surfaces are configured as matching inclined surfaces. The second plane N is perpendicular to the thickness direction Z of the midplate.

[0129] With the above structure, when the second middle plate 2 tends to deviate from the first middle plate 1 and detach outward, the reaction force provided by the inclined surfaces in the slot 31 that are matched to be inclined relative to the first plane M or the second plane N can be decomposed into a force along the middle plate thickness direction Z and a force along the middle plate width direction X, wherein the force along the middle plate width direction X can prevent the second middle plate 2 from deviating from the first middle plate 1 and detaching outward.

[0130] Those skilled in the art will appreciate that the dovetail groove structure 3a and the undercut structure 3b can be freely combined, i.e., the buckle 3 may include neither the dovetail groove structure 3a nor the undercut structure 3b, may include only the dovetail groove structure 3a or only the undercut structure 3b, or may include both the dovetail groove structure 3a and the undercut structure 3b, and this application does not impose any restrictions on this. In one embodiment, both the dovetail groove structure and the undercut structure are provided. Specifically, each column of the buckle structure has a total of 13 buckle structures 3 spaced apart, including 12 dovetail groove structures 3a and 3 undercut structures 3b.

[0131] As shown in Figures 14a-14d, in one embodiment, the position-limiting structure includes at least one snap-fit ​​structure 4. Each snap-fit ​​structure 4 includes a snap-fit ​​structure 41 and a snap-fit ​​groove 42 that snap together to limit the position of the first middle plate 1 and the second middle plate 2. The specific number of snap-fit ​​structures 4 is not limited, and can be one, two, or four. In one embodiment, one snap-fit ​​structure 4 is provided.

[0132] Those skilled in the art will appreciate that the locations of the snap-fit ​​structure 41 and the snap-fit ​​groove 42 in the snap-fit ​​structure 4 are not limited; one can be located on the first middle plate 1 and the other can be located on the second middle plate 2. In one embodiment, the snap-fit ​​structure 41 is located on the second middle plate 2, and the snap-fit ​​groove 42 is located on the first middle plate 1. Specifically, the snap-fit ​​structure 41 is formed to extend outward from a side of the second side wall 21 away from the second support plate 22, and includes a cantilever 411 and two connecting arms 412 spaced apart along the length of the cantilever 411. The cantilever 411 is spaced apart relative to the second side wall 21, with one end of each connecting arm 412 connected to the cantilever 411 and the other end of each connecting arm 412 connected to the second side wall 21. The snap-fit ​​groove 42 is formed in the first side wall 11, formed by the outer wall surface 11b being recessed toward the inner wall surface 11a, and is configured as a groove structure that matches the shape of the snap-fit ​​structure 41.

[0133] The snap-fit ​​structure 4 can limit the relative movement of the second middle plate 2 relative to the first middle plate 1 in all directions. Specifically, the snap-fit ​​structure 41 has a top surface 41a and a bottom surface 41b arranged opposite to each other along the thickness direction Z of the middle plate, and a side surface 41c connecting the top surface 41a and the bottom surface 41b and facing away from the second side wall 21. After assembly, the top surface 41a of the snap-fit ​​structure 4 is located in the same plane as the upper surface 11c of the first support plate 12, and the bottom surface 41b and the side surface 41c of the snap-fit ​​structure 41 abut against the snap-fit ​​groove 42, limiting the relative movement of the second middle plate 2 relative to the first middle plate 1 along the thickness direction Z toward the second support plate 22, and the movement of the second middle plate 2 relative to the first middle plate 1 along the width direction X toward the first side wall 11. The protruding portion of the snap-fit ​​groove 42 extends into the gap between the two connecting arms 412, limiting the relative movement of the first middle plate 1 and the second middle plate 2 in the width direction X of the middle plate.

[0134] The first middle plate 1 and the second middle plate 2 form a structural connection relationship through the above-mentioned snap structure 3 and buckle structure 4 on the first side wall 11 and the second side wall 21, so that the first middle plate 1 and the second middle plate 2 do not move relative to each other in all directions.

[0135] Those skilled in the art will understand that the pivot mechanism 20 is fixedly connected to the pivot accommodating area A on the middle plate 110, and the middle plate 110 is provided with a fixed structure that cooperates with the pivot mechanism 20 to meet the connection function of the two, and can achieve sealing, waterproofing, corrosion resistance, electrical connection and other properties through the design of the connection structure. The present application does not impose any restrictions on this. The following is an illustrative example of possible connection methods between the middle plate 110 and the pivot mechanism 20 with reference to the accompanying drawings.

[0136] Please refer to Figures 15 to 17, Figure 15 is a schematic diagram of the principle of the connection between the shell and the hinge mechanism of the foldable electronic device in an embodiment of the present application; Figure 16a is a schematic diagram of the cross-sectional structure in the EE direction in Figure 10; Figure 16b is a schematic diagram of the structure of the reinforcing plate of the first middle plate in the shell of the foldable electronic device in an embodiment of the present application; Figure 17 is a schematic diagram of the structure of the extension part of the first middle plate in the shell of the foldable electronic device in an embodiment of the present application.

[0137] As shown in Figures 15 to 17, in one embodiment, a plurality of mounting holes 51 are provided on the second support plate 22, and fasteners such as screws are passed through each mounting hole 5, so that the rotating shaft mechanism 20 can be fixed and detachably connected to the second support plate 22. The specific number of mounting holes 5 is not limited, and can be 6, 8, 10, etc., and this application does not impose any restrictions on this. In one embodiment, the number of mounting holes is 9. Moreover, the arrangement of the plurality of mounting holes 51 is not limited. In one embodiment, the mounting holes 51 are spaced apart in the longitudinal direction Y of the middle plate. Due to space limitations, the axis L of each mounting hole 5 is not in the same plane, or it can be understood that the vertical distance between the axis L of each mounting hole and the second side wall 21 is different.

[0138] As shown in Figures 10-11 and 16a-16b, in one embodiment, accommodating spaces 61 are provided on the second middle plate 2 at locations corresponding to at least some of the mounting holes 51. Each accommodating space 61 is recessed into the interior of the second support plate 22 along the width direction X of the middle plate, extending from the second side wall 21 toward a side surface of the first side wall 11. The space 61 is connected to the corresponding mounting hole 51. The accommodating spaces 61 are used to accommodate the reinforcing plate 62 on the first middle plate 1. In one embodiment, in the thickness direction Z of the middle plate, the accommodating spaces 61 are located between the first surface 22a and the second surface 22b of the second support plate 22. In the width direction X of the middle plate, the accommodating spaces 61 penetrate the second side wall 21 but do not extend to the side of the second support plate 22 away from the second side wall 21.

[0139] In one embodiment, a protruding reinforcing plate 62 corresponding to the accommodating space 61 is provided on a side surface of the first side wall 11 facing the second side wall 21. The reinforcing plate 62 extends into the corresponding accommodating space 61 and is provided with a connecting hole 52 aligned with the corresponding mounting hole 5. Fasteners are inserted through the connecting hole 52 on the reinforcing plate 62 and the corresponding mounting hole 51, so that the second support plate 22 and the reinforcing plate 62 can be fixed and detachably connected to the rotating shaft mechanism 20. In one embodiment, as viewed in the thickness direction Z of the middle plate, at the accommodating space 61, the reinforcing plate 62 is integrally embedded within the second support plate 22. The second support plate 22 covers the upper and lower sides of the reinforcing plate 62 and is locked by fasteners. Based on the limiting structure on the first side wall 11 and the second side wall 21, the first middle plate 1 and the second middle plate 2 are increased in the joint position, further improving the connection strength of the first middle plate 1 and the second middle plate 2.

[0140] As shown in Figures 8a to 10 and 17, in one embodiment, the first middle plate 1 further includes at least one extension portion 71. The specific number of extension portions 71 is not limited and may be 2, 3, 4, etc., and this application does not impose any restrictions thereon. In one embodiment, the number of extension portions 71 is 3. Each extension portion 71 extends from a side of the first side wall 11 away from the first support plate 12 toward the second support plate 22. At the corresponding position of each extension portion 71, a notch 72 is provided on the second middle plate 2, and the extension portion 71 is located within the notch 72. The extension portion 71 has a first surface 71a and a second surface 71b that are disposed opposite to each other along the middle plate thickness direction Z. The first surface 71a of the extension portion 71 is in contact with the first surface 22a of the second support plate 22, and the second surface 71b of the extension portion 71 is in contact with the second surface 22b of the second support plate 22. The extension portion 71 and the second support plate 22 together constitute the bottom plate of the shaft accommodating area A. The extension portion 71 may be used to achieve electrical connection between the first middle plate 1 and the rotating shaft mechanism 20 , for example, to ground the rotating shaft mechanism 20 .

[0141] In one embodiment, each extension portion 71 is provided with a fixing hole 53 and a spring clip mounting groove 8. The fixing hole 53 is a through hole. By inserting a fastener through the fixing hole 53, the extension portion 71 can be fixed and removably connected to the rotating shaft mechanism 20. An annular insulating film surrounding the fixing hole 53 is affixed to the outer peripheral area of ​​the fixing hole 53. The insulating film is non-conductive and can prevent galvanic corrosion in the covered area. A spring clip is installed in the spring clip mounting groove 8, which abuts the rotating shaft mechanism 20 to achieve electrical connection between the first middle plate and the rotating shaft mechanism. The inner wall of the spring clip mounting groove is provided with an annular foam surrounding the spring clip. The annular foam acts as a waterproof barrier, preventing galvanic corrosion by preventing electrolyte from entering the spring clip mounting groove.

[0142] As shown in Figures 8a and 8b, in one embodiment, an avoidance space 9 for signals to pass through is provided between the first middle plate 1 and the second middle plate 2. The avoidance space 9 is used to install parts such as signal lines and connect the first part 301 and the second part 302 of the screen 30.

[0143] In summary, the material selection of the shell 10x provided in this application is more flexible, which can achieve stable chemical properties while reducing the weight of the fuselage, thereby improving the consumer experience.

[0144] Finally, it should be noted that the above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A housing for a foldable electronic device, comprising a middle plate, wherein the middle plate has a shaft accommodating area and a non-shaft accommodating area, wherein the shaft accommodating area is used to accommodate and install a shaft mechanism of the foldable electronic device, characterized in that: The middle plate includes a first middle plate and a second middle plate connected to each other, at least a portion of the first middle plate constitutes at least a portion of the non-rotating shaft accommodating area, at least a portion of the second middle plate constitutes at least a portion of the rotating shaft accommodating area, and the material of the first middle plate is different from the material of the second middle plate.

2. The housing according to claim 1, characterized in that A portion of the first middle plate constitutes all areas of the non-rotating shaft accommodating area, and the other portion of the first middle plate and the entire second middle plate together constitute all areas of the rotating shaft accommodating area; Alternatively, the entire first middle plate constitutes all areas of the non-rotating shaft accommodating area, and the entire second middle plate constitutes all areas of the rotating shaft accommodating area.

3. The housing according to claim 1 or 2, characterized in that: The first middle plate includes a first support plate and a first side wall, the first support plate has a first surface and a second surface disposed opposite to each other along a thickness direction thereof, the first side wall is connected to a side edge of the first support plate and protrudes from the second surface of the first support plate; The second middle plate comprises a second support plate and a second side wall, the second support plate has a first surface and a second surface disposed opposite to each other along a thickness direction thereof, the second side wall is connected to a side edge of the second support plate and protrudes from the first surface of the second support plate; The second side wall is connected to the first side wall, the second support plate is located outside one side edge of the first support plate, and is spaced apart from the first support plate in the thickness direction of the middle plate, and the surface of the second support plate facing the first support plate is the first surface of the second support plate; Furthermore, the first support plate as a whole constitutes the entire area of ​​the non-shaft accommodating area, and the second support plate and the second side wall and the first side wall as a whole constitute at least a part of the area of ​​the shaft accommodating area, wherein the second support plate constitutes the bottom plate of the shaft accommodating area, and the first side wall and the second side wall together constitute the side wall of the shaft accommodating area, and together with the second support plate, form a space for accommodating the shaft mechanism.

4. The housing according to claim 3, characterized in that A limiting structure is disposed at a position where the second side wall meets the first side wall, and the limiting structure is configured to relatively fix the first middle plate and the second middle plate.

5. The housing according to claim 4, characterized in that The limiting structure includes at least one snap-fit ​​structure, each of the at least one snap-fit ​​structure includes a snap-fit ​​slot and a boss snapped into the snap-fit ​​slot, one of the snap-fit ​​slot and the boss is located on the first side wall of the middle plate, and the other is located on the second side wall of the middle plate.

6. The housing according to claim 5, characterized in that In each of the buckle structures, the slot is formed by being recessed from a side of the first side wall away from the first support plate toward the inside of the first side wall, and the boss is formed by extending outward from a side of the second side wall away from the second support plate.

7. The housing according to claim 5 or 6, characterized in that: At least a portion of the at least one snap-fit ​​structure is configured as a dovetail groove structure. In each of the dovetail groove structures, the snap-fit ​​groove is configured as a dovetail groove. The two side surfaces of the dovetail groove are relatively arranged in the length direction of the middle plate, and the groove width of the dovetail groove gradually increases from the groove mouth to the groove bottom. The boss is configured as a structure matching the shape of the dovetail groove to limit the relative movement of the first middle plate and the second middle plate in the length direction and width direction of the middle plate.

8. The housing according to claim 7, characterized in that In each of the dovetail groove structures, the boss has a first end face and a second end face that are arranged opposite to each other in the thickness direction of the middle plate, and the second end face is arranged toward the second support plate. The first end face and / or the second end face in at least part of the dovetail groove structure are configured as an inclined surface inclined relative to a first plane, and the surface in the dovetail groove that is arranged opposite to the inclined surface of the boss is configured as a matching inclined surface to limit the relative movement of the first middle plate and the second middle plate in the width direction of the middle plate, wherein the first plane is perpendicular to the thickness direction of the middle plate.

9. The housing according to any one of claims 5 to 8, characterized in that At least part of the at least one snap-fit ​​structure is configured as an inverted structure. In each of the inverted structures, the boss has a first end face and a second end face that are arranged opposite to each other in the thickness direction of the middle plate, the second end face is arranged toward the second support plate, the first end face and / or the second end face are configured as an inclined surface inclined relative to a second plane, and the surface in the slot that is arranged opposite to the inclined surface of the boss is configured as a matching inclined surface to limit the relative movement of the first middle plate and the second middle plate in the width direction of the middle plate, wherein the second plane is perpendicular to the thickness direction of the middle plate.

10. The housing according to any one of claims 5 to 9, characterized in that: The at least one buckle structure is a plurality of buckle structures.

11. The housing according to any one of claims 5 to 10, characterized in that: The plurality of snap-in structures constitute at least one column of snap-in structures, and each column of the at least one column of snap-in structures includes at least two snap-in structures spaced apart in the length direction of the middle plate.

12. The housing according to claim 11, characterized in that The at least one row of buckle structures is two rows of buckle structures, and the two rows of buckle structures are arranged at intervals in the thickness direction of the middle plate.

13. The housing according to claim 12, wherein: One of the two rows of snap structures is arranged on the top surface of the side wall of the shaft accommodating area, and the other row of snap structures is arranged on the bottom surface of the side wall of the shaft accommodating area, wherein the top surface of the side wall of the shaft accommodating area is connected to the first surface of the first support plate, and the bottom surface of the side wall of the shaft accommodating area is connected to the second surface of the second support plate.

14. The housing according to any one of claims 4 to 13, characterized in that: The limiting structure includes at least one buckling structure, and each of the at least one buckling structure includes a buckling structure body and a buckling groove that buckle with each other; The snap-fit ​​structure is formed by extending outward from a side surface of the second side wall away from the second support plate, and includes a cantilever and two connecting arms spaced apart along the length direction of the cantilever, the cantilever and the second side wall are spaced apart relative to each other, one end of each of the two connecting arms is connected to the cantilever, and the other end of each connecting arm is connected to the second side wall, the snap-fit ​​groove is formed on the first side wall, and is configured as a groove structure matching the shape of the snap-fit ​​structure.

15. The housing according to any one of claims 3 to 14, characterized in that: The second support plate is provided with a plurality of mounting holes, and the second support plate can be fixed and detachably connected to the rotating shaft mechanism by inserting fasteners into each of the plurality of mounting holes, wherein the axes of each of the plurality of mounting holes are not in the same plane.

16. The housing according to claim 15, characterized in that An accommodating space is provided on the second middle plate at a position corresponding to at least part of the plurality of mounting holes, and each of the accommodating spaces is formed by being recessed from the second side wall toward one side of the first side wall along the width direction of the middle plate toward the inside of the second support plate, and is communicated with the corresponding mounting hole; A protruding reinforcing plate corresponding to each of the accommodating spaces is provided on one side surface of the first side wall facing the second side wall. The reinforcing plate extends into the corresponding accommodating space and is provided with a connecting hole aligned with the corresponding mounting hole. The fasteners are passed through each of the connecting holes and the corresponding mounting holes, so that the second support plate and the reinforcing plate can be fixed and detachably connected to the rotating shaft mechanism.

17. The housing according to claim 16, wherein: The reinforcing plate is entirely embedded in the interior of the second supporting plate.

18. The housing according to any one of claims 3 to 17, characterized in that: The first middle plate also includes at least one extension portion, each of the at least one extension portion extends from a side of the first side wall away from the first support plate toward the second support plate, a notch is set at a position of the second middle plate corresponding to each of the extension portions, the extension portion is located in the notch, and the extension portion has a first surface and a second surface that are arranged opposite to each other along its thickness direction, the first surface of the extension portion is connected to the first surface of the second support plate, and the second surface of the extension portion is connected to the second surface of the second support plate, and the at least one extension portion and the second support plate together constitute the bottom plate of the shaft accommodating area.

19. The housing according to claim 18, characterized in that Each of the extension parts is provided with a fixing hole and a spring sheet. By inserting a fastener in the fixing hole, the extension part can be fixed and detachably connected to the rotating shaft mechanism. The area on the outer peripheral side of the fixing hole is affixed with an annular insulating film surrounding the fixing hole; the spring sheet abuts against the rotating shaft mechanism, and a spring sheet mounting groove is provided at a position on the extension part corresponding to the spring sheet. The spring sheet is installed in the spring sheet mounting groove, and the inner wall surface of the spring sheet mounting groove is provided with an annular foam surrounding the spring sheet.

20. The housing according to any one of claims 1 to 19, characterized in that: An escape space for signal lines to pass through is provided between the first middle plate and the second middle plate.

21. The housing according to any one of claims 1 to 20, characterized in that: The first middle plate is an integrated structure made of alloy material, and the second middle plate is an integrated structure made of alloy material or plastic.

22. The housing according to claim 21, characterized in that When the first middle plate and the second middle plate are both an integrated structure made of alloy material, the density of the first middle plate is less than the density of the second middle plate; The rotating shaft mechanism comprises a matching component in contact with the second middle plate, the material of the matching component is an alloy, and the absolute value of the potential difference between the alloy material of the matching component and the alloy material of the second middle plate is smaller than the absolute value of the potential difference between the alloy material of the matching component and the alloy material of the first middle plate.

23. The housing according to claim 21 or 22, characterized in that When the first middle plate and the second middle plate are both an integrated structure made of alloy materials, the material of the first middle plate is a magnesium alloy, and the material of the second middle plate is an aluminum alloy.

24. A foldable electronic device, comprising a hinge mechanism, a first shell and a second shell arranged on both sides of the hinge mechanism, wherein the first shell and the second shell are rotatably connected through the hinge mechanism so that the first shell and the second shell can be relatively unfolded or relatively folded; characterized in that: At least one of the first shell and the second shell adopts the shell according to any one of claims 1 to 23.

25. The foldable electronic device according to claim 24, characterized in that: Each of the first shell and the second shell is a shell according to any one of claims 1 to 23.

26. The foldable electronic device according to claim 24 or 25, characterized in that: The pivot mechanism includes a base, a first pivot arm and a second pivot arm arranged on both sides of the base, one end of the first pivot arm is rotatably connected to one side of the base, and the other end is connected to the pivot accommodating area of ​​the middle plate of the first shell through a first connecting bracket, and one end of the second pivot arm is rotatably connected to the other side of the base, and the other end is connected to the pivot accommodating area of ​​the middle plate of the second shell through a second connecting bracket.

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