Patent Description:
This application relates to the field of electronic product technologies, and in particular, to a housing assembly and an electronic device.

Document <CIT> discloses housing for electronic device comprising a metal substrate having a bonding surface, a peripheral edge and a ridge protruding from the peripheral edge and surrounding the bonding surface. It further comprises a soft layer soft to the touch having an edge and an adhesive layer located between the bonding surface of the substrate and the soft layer, thereby bonding the soft layer to the substrate. The ridge of the substrate blocks the edge of the soft layer.

Document <CIT> discloses a shell assembly and a mobile terminal. The shell assembly comprises a middle frame and a cover plate, wherein the middle frame comprises a frame provided with a mounting surface and wherein the cover plate comprises a buckling part connected to the mounting surface through a bonding layer. A recess is formed in the position corresponding to the end part of the cover plate of the frame so that an avoiding gap is formed between the cover plate and the middle frame. The shell assembly further comprises an elastic filling body for filling the avoiding gap, which is arranged in the avoiding gap between the cover plate and the middle frame playing a role in buffering when the shell assembly falls off to bear extrusion force, absorb, compensate dynamic load and avoids stress fracture caused by direct rigid combination of the cover plate and the middle frame. This reduces the risk of cover plate fracture and improves the reliability of the shell assembly.

Document <CIT> discloses a mobile terminal comprising a middle frame, a rear cover and a support. The support is deformable under external force and can restore deformation when the external force is revoked. The rear cover is mounted on the support and the support is mounted on the middle frame. The rear cover of the mobile terminal is mounted on the support and the support mounted on the middle frame, thus even if the rear cover and the middle frame are relatively high in rigidity and relatively poor in elasticity, a big gap between the support and the rear cover is avoided since the support is elastic. The big gap between the support and the middle frame is also avoided and consequently, relatively big gaps generated while assembling the middle frame and the rear cover of the mobile terminal can be avoided.

Document <CIT> discloses a display device comprising a middle frame, a display panel and a transparent cover plate. An edge of the middle frame protrudes upwards to form a side wall. The edge of the middle frame protrudes inwards to form a boss to support the transparent cover plate. The display panel is positioned below the transparent cover plate that is bonded and fixed with the side wall through an adhesive. Moreover, a side face of the transparent cover plate is connected with the side wall of the middle frame through an adhesive.

Leather rear covers are gradually sought after and favored by consumers in application in electronic devices such as cellphones and tablets due to their aesthetic appearance and comfortable hand feel. However, leather rear covers have poor match with middle frames. When a leather rear cover is mounted to a middle frame, a relatively large gap is usually present between the leather rear cover and the middle frame, affecting aesthetics of the rear cover and user experience.

This application provides a housing assembly and an electronic device to resolve technical problems of poor match and large gap between a rear cover and a middle frame in an existing housing assembly The invention is defined in independent claim <NUM> with advantageous features defined in dependent claims <NUM> to <NUM>.

According to a first aspect, this application provides a housing assembly, including a middle frame and a rear cover, wherein the rear cover comprises a support and a decorative part the support being made of a fiber reinforced resin material, the decorative part being made of vegan leather, silica gel, leather texture vegetation, or animal leather. The middle frame includes a middle frame body and a border frame, where the border frame is connected to an outer edge of the middle frame body by the avoidance part. A groove is formed by the middle frame body, the avoidance part and the border frame. The support includes a support body and a support end and a protrusion. The portion of the support comprising the support end and the protrusion will hereinafter be also referred to as "tailbone". The support end is connected to an outer edge of the support body and the support end is connected to the protrusion. The support body includes a first support surface and a second support surface, where the first support surface and the second support surface face away from each other. The protrusion protrudes from the first support surface. The support end or the protrusion (c) is partially located in the groove (a), and a gap is present between the support end and the avoidance part The decorative part is mounted on the first support surface with an end of the decorative part connected to the protrusion. The support is mounted on the middle frame with the second support surface facing the middle frame. The support and the decorative part are connected to form a rear cover.

In this application, the support and the middle frame are connected, so that the rear cover and the middle frame are connected, improving match between the rear cover and the middle frame. Moreover, with the tailbones provided on the support, a gap between the support and the middle frame can be reduced, increasing aesthetics of the housing assembly and improving user experience. In addition, the tailbones provide protection for the decorative part, which can prevent the decorative part from curling or damage that affects aesthetics of the housing assembly and user experience.

In an implementation, the end of the decorative part includes a decorative part end surface, and the protrusion includes a first protrusion surface, where the protrusion and the support body enclose a mounting recess with the first protrusion surface facing the mounting recess. The decorative part is mounted in the mounting recess with the decorative part end surface opposite the first protrusion surface. In this embodiment, the tailbones provide protection for the decorative part, which can prevent the decorative part from curling or damage from an end close to the decorative part end surface that affects aesthetics of the housing assembly and user experience.

In an implementation, the support body includes a first support segment and second support segments, where the second support segment is connected to an outer edge of the first support segment.

In an implementation, the tailbone includes a protrusion end surface, where the protrusion end surface is connected to the first protrusion surface, with the protrusion end surface located at an end of the tailbone; and the decorative part includes a first decorative part surface and a second decorative part surface, where the first decorative part surface and the second decorative part surface face away from each other, and the decorative part is mounted on the support, with the second decorative part surface facing the support and smooth transition present between the protrusion end surface and the first decorative part surface. In this embodiment, smooth transition is present without a gap between the first decorative part surface and the protrusion end surface, which can reduce a scratchy feel and further increase aesthetics of the housing assembly.

In an implementation, the border frame includes a border frame outer surface, and the support is mounted on the middle frame, with smooth transition present between the protrusion end surface and the border frame outer surface. This may be understood as that the protrusion end surface and the border frame outer surface form a surface, with the surface being a curved surface. The protrusion end surface extends towards the border frame outer surface and smoothly transits to the border frame outer surface. In this embodiment, the tailbone is provided on the support and smooth transition is present between the protrusion end surface and the border frame outer surface, which increases aesthetics of the housing assembly and reduces a scratchy feel, thereby improving user experience.

In an implementation, the tailbone includes a second protrusion surface, where the second protrusion surface and the first protrusion surface face away from each other, the protrusion end surface is connected between the first protrusion surface and the second protrusion surface, and an included angle between the protrusion end surface and the first protrusion surface is an acute angle. In this embodiment, a protruding part of the tailbone may be reduced while the tailbone provides protection for the decorative part and the decorative part end surface, which further prevents the protrusion end surface of the tailbone from giving a scratchy feel, thereby improving user experience.

In an implementation, the support further includes extensions, where the extension is connected to the protrusion. The support is mounted on the middle frame with the extension extending towards the border frame. In this embodiment, the provided extensions can further reduce a gap between the support and the border frame, increasing aesthetics of the housing assembly and reducing dust and moisture into the gap between the support and the border frame.

In an implementation, the extension includes an extension side surface and an extension bottom surface, where the extension bottom surface is connected between the second protrusion surface and the extension side surface, and the extension side surface is connected to the protrusion end surface. Smooth transition is present between the extension side surface and the border frame outer surface. In this embodiment, smooth transition is present between the extension and the middle frame to ensure smooth transition between the support and the middle frame, increasing aesthetics of the housing assembly and reducing a scratchy feel, thereby improving user experience.

In an implementation, the extension further includes a connecting surface, where the connecting surface is connected between the extension bottom surface and the extension side surface. The connecting surface may be a plane or a curved surface. In this embodiment, the provided connecting surface can prevent the extension side surface and the extension bottom surface from being directly connected to form a sharp angle that results in a scratchy feel and affects user experience.

In an implementation, a maximum size of a gap between the extension and the border frame in a thickness direction of the housing assembly is <NUM> to <NUM>. In this embodiment, the provided extensions can further reduce a gap between the support and the border frame, increasing aesthetics of the housing assembly and reducing dust and moisture into the gap between the support and the border frame.

In an implementation, an included angle between a length direction of the tailbone and an extension direction of the second support segment is <NUM> degrees to <NUM> degrees, so as to ensure that the tailbone can provide protection for the decorative part and be assembled with the middle frame, thereby reducing the gap between the middle frame and the support.

In an implementation, a distance between the decorative part end surface and the first protrusion surface is <NUM> to <NUM>.

In an implementation, the tailbone includes a second protrusion surface, where the second protrusion surface and the first protrusion surface face away from each other, and a minimum distance between the second protrusion surface and the border frame is <NUM> to <NUM>.

In an implementation, the first support segment includes a first surface and a second surface, the first surface and the second surface facing away from each other, and the second support segment includes a third surface and a fourth surface, the third surface and the fourth surface facing away from each other. The first surface and the third surface are joined together to form the first support surface, with the first support surface being a plane. The second surface and the fourth surface are joined together to form the second support surface, with the second support surface being a plane. In other words, the support body is of a flat plate shape.

In an implementation, at least part of the second support segment is curved relative to the first support segment. The second support segment is curved towards the middle frame. In this embodiment, the second support segments are provided on the support and at least part of the second support segment is curved relative to the first support segment to increase three-dimensional sense of the housing assembly, thereby increasing aesthetics of the housing assembly and improving user experience.

In an implementation, the tailbones include two first sub-tailbones and two second sub-tailbones. The second support segments include two first sub-support segments and two second sub-support segments, where the two first sub-support segments are connected to two opposite ends of the first support segment in a width direction of the housing assembly, with the first sub-support segments being curved relative to the first support segment, and the two second sub-support segments are connected to two opposite ends of the first support segment in a length direction of the housing assembly. One such first sub-tailbone is connected to an end of one such first sub-support segment away from the first support segment. One such second sub-tailbone is connected to an end of one such second sub-support segment away from the first support segment. The decorative part is mounted on the support, with the decorative part end surfaces located in the width direction of the housing assembly connected to the first sub-tailbones, and the decorative part end surfaces located in the length direction of the housing assembly connected to the second sub-tailbones.

In this embodiment, the first sub-support segments located at two opposite ends in the width direction of the housing assembly are disposed as curved relative to the first support segment, and the second sub-support segments located at two opposite ends in the length direction of the housing assembly are disposed as flat and straight, which can simplify a structure of the housing assembly while increasing three-dimensional sense of the housing assembly. In addition, the first sub-tailbones protect the decorative part and the decorative part end surfaces in a width direction of the decorative part, preventing the decorative part from curling or damage. The second sub-tailbones protect the decorative part and the decorative part end surfaces in a length direction of the decorative part, further preventing the decorative part from curling or damage that affects aesthetics of the rear cover and user experience.

In an implementation, the two first sub-tailbones and the two second sub-tailbones are connected head to tail, and the two first sub-tailbones and the two second sub-tailbones are integrally formed to increase stability of the tailbone structure.

According to the claimed invention, the decorative part is made of vegan leather, silica gel, leather texture vegetation, or animal leather. The decorative part made of leather has good appearance and texture, comfortable touch, skin-friendly characteristic, good wear resistance and aging resistance, and light weight, which is conducive to light-weighting of an electronic device.

According to the claimed invention, the support is made of fiber reinforced resin. The resin may be heat convertible resin, such as polyurethane, or may be thermoplastic resin, such as polycarbonate. The fiber includes but is not limited to aramid fiber, fiberglass, and carbon fiber. The support made of a fiber reinforced resin material has advantages of high strength and light weight.

In an implementation, the housing assembly includes a first bonding member, and the first bonding member is disposed between the support and the decorative part and bonds the support and the decorative part. In this embodiment, the first bonding member is hot melt adhesive. Hot melt adhesive melts when heated and can be cured at room temperature with fast bonding performance, high bonding strength, and a wide range of bonding materials. In other embodiments, the first bonding member may alternatively be double-sided adhesive or other glues, provided that fixed connection between the decorative part and the support is implemented.

In an implementation, the housing assembly includes a second bonding member, and the second bonding member is disposed between the middle frame and the support and bonds the middle frame and the support, so as to increase stability of connection between the support and the middle frame.

According to a second aspect, this application provides an electronic device, including a body and the foregoing housing assembly, where the body is mounted in the housing assembly.

In summary, in this application, the support and the middle frame are connected, so that the rear cover and the middle frame are connected, improving match between the rear cover and the middle frame. Moreover, with the tailbones provided on the support, a gap between the support and the middle frame can be reduced, increasing aesthetics of the housing assembly and improving user experience. In addition, the tailbones provide protection for the decorative part, which can prevent the decorative part from curling or damage that affects aesthetics of the housing assembly and user experience.

Referring to <FIG> is a schematic structural diagram of an electronic device according to an embodiment of this application. The electronic device <NUM> includes but is not limited to a cellphone (cellphone), a notebook computer (notebook computer), a tablet computer (tablet personal computer), a laptop computer (laptop computer), a personal digital assistant (personal digital assistant), a wearable device (wearable device), a mobile device (mobile device), and the like. In this embodiment of this application, a cellphone is used as an example of the electronic device <NUM> for description.

For ease of description, a width direction of the electronic device <NUM> is defined as a direction X, a length direction of the electronic device <NUM> is defined as a direction Y, and a thickness direction of the electronic device <NUM> is defined as a direction Z. The direction X, direction Y and direction Z are perpendicular to each other.

The electronic device <NUM> includes a body (not shown in the figure) and a housing assembly <NUM>. The body is mounted in the housing assembly <NUM>.

Referring to <FIG>, <FIG> is a partial structural schematic diagram of the housing assembly <NUM> in the electronic device shown in <FIG>, <FIG> is an enlarged schematic structural diagram of an area E in the housing assembly <NUM> shown in <FIG>, and <FIG> is a schematic exploded structural diagram of the housing assembly <NUM> shown in <FIG>.

The housing assembly <NUM> includes a rear cover <NUM> and a middle frame <NUM>. The rear cover <NUM> is mounted to the middle frame <NUM> and is fixedly connected to the middle frame <NUM>. The rear cover <NUM> includes a support <NUM> and a decorative part <NUM>. The decorative part <NUM> is fixedly connected to the support <NUM>, and a surface of the support <NUM> facing away from the decorative part <NUM> faces the middle frame <NUM>.

Referring to <FIG> is a partial structural schematic diagram of the middle frame <NUM> in the housing assembly <NUM> shown in <FIG>.

The middle frame <NUM> is made of an aluminum alloy material. In other embodiments, the middle frame <NUM> may alternatively be made of metal materials such as stainless steel, steel-aluminum composite die cast, and titanium alloy. The middle frame <NUM> made of metal materials has good heat dissipation performance as well as good appearance, texture and touch. Alternatively, the middle frame <NUM> may be made of plastic. The plastic includes but is not limited to polycarbonate (PC), acrylonitrile-butadiene-styrene (ABS), polystyrene (PS), and polyamide (PA). The middle frame <NUM> made of plastic has light weight, which helps make electronic devices thinner and lighter.

The middle frame <NUM> includes a middle frame body <NUM>, an avoidance part <NUM>, and a border frame <NUM>. The middle frame body <NUM> includes a first surface <NUM>, a second surface <NUM> and a first side surface <NUM>. The first surface <NUM> and the second surface <NUM> face away from each other. The first side surface <NUM> is connected to the first surface <NUM> and surrounds an outer edge of the first surface <NUM>, with the first side surface <NUM> being a curved surface. In another implementation, the first side surface <NUM> may alternatively be a plane or a tilted surface. The middle frame body <NUM> is further provided with a groove a. The groove a is located at an edge of the middle frame body <NUM> and concavely disposed from the first surface <NUM> towards a positive direction of the Z axis, so as to form the avoidance part <NUM> and the border frame <NUM> on the middle frame body <NUM>.

The avoidance part <NUM> is located at an outer edge of the middle frame body <NUM> and connects to the middle frame body <NUM>. The avoidance part <NUM> includes an upper surface <NUM> which is a bottom wall of the groove a. The border frame <NUM> includes a border frame outer surface <NUM>, a border frame inner surface <NUM>, and a border frame top surface <NUM>. The border frame outer surface <NUM> and the border frame inner surface <NUM> face away from each other, and the border frame top surface <NUM> is connected between the frame outer surface <NUM> and the border frame inner surface <NUM>. The border frame inner surface <NUM> is connected to the upper surface <NUM> of the avoidance part <NUM>. That is, the border frame <NUM> is connected to an end of the avoidance part <NUM> facing away from the middle frame body <NUM>, with the border frame <NUM> located around the avoidance part <NUM>. In this embodiment, the border frame outer surface <NUM> is a curved surface. The border frame inner surface <NUM> includes two connected surfaces, or the border frame inner surface <NUM> may also be a curved surface. The border frame inner surface <NUM> and the first side surface <NUM> are side walls of the groove a.

In this embodiment, the middle frame body <NUM>, the avoidance part <NUM>, and the border frame <NUM> are integrally formed to ensure stability of a structure of the middle frame <NUM>.

Referring to <FIG> is a schematic structural diagram of the support <NUM> in the housing assembly <NUM> shown in <FIG>.

The support <NUM> is made of a fiber reinforced resin material. The resin may be heat convertible resin, such as polyurethane, or may be thermoplastic resin, such as polycarbonate. The fiber includes but is not limited to aramid fiber, fiberglass, and carbon fiber. The support <NUM> made of the fiber reinforced resin material has advantages of high strength and light weight.

The support <NUM> includes a support body <NUM> and tailbones <NUM>. The support body <NUM> includes a first support segment <NUM> and second support segments <NUM>. The second support segment <NUM> is connected to an outer edge of the first support segment <NUM>. The first support segment <NUM> includes a first surface <NUM> and a second surface <NUM>, the first surface <NUM> and the second surface <NUM> facing away from each other. The second support segment <NUM> includes a third surface <NUM> and a fourth surface <NUM>, the third surface <NUM> and the fourth surface <NUM> facing away from each other. After the second support segments <NUM> and the first support segment <NUM> are connected, surfaces of them facing one same direction together form a first support surface <NUM> and surfaces of them facing the other same direction together form a second support surface <NUM>, which are surfaces of the support body <NUM>, with the first support surface <NUM> and the second support surface <NUM> facing away from each other. The first surface <NUM> and the third surface <NUM> together form the first support surface <NUM>, and the second surface <NUM> and the fourth surface <NUM> together form the second support surface <NUM>. The second support segment <NUM> is curved along the first support surface <NUM> towards the second support surface <NUM>. In this embodiment, the second support segment <NUM> is arc-shaped. In other words, both the third surface <NUM> and the fourth surface <NUM> are curved surfaces.

The tailbone <NUM> includes a support end b and a protrusion c. The support end b is connected to the second support segment <NUM>, and the protrusion c is connected to the support end b, with the protrusion c protruding from the third surface <NUM>. It should be noted that the support body <NUM>, the support end b and the protrusion c are an integrally formed component. Dotted lines in <FIG> are merely for ease of description and are actually not present.

The tailbone <NUM> further includes a first protrusion surface <NUM>, a second protrusion surface <NUM> and a protrusion end surface <NUM>. The first protrusion surface <NUM> and the second protrusion surface <NUM> face away from each other, the protrusion end surface <NUM> is located at a free end of the tailbone <NUM>, and the protrusion end surface <NUM> is connected between the first protrusion surface <NUM> and the second tail protrusion bone surface <NUM>. The tailbone <NUM> is connected to an end of the second support segment <NUM> away from the first support segment <NUM>. That is, the tailbone <NUM> surrounds an outer edge of the first support segment <NUM>, with the protrusion c of the tailbone <NUM> protruding from the third surface <NUM>. An included angle between an extension direction of the tailbone <NUM> and an extension direction of the second support segment <NUM> is a first included angle α, which is <NUM> degrees to <NUM> degrees. It should be noted that the extension direction of the tailbone <NUM> mentioned herein is a length direction of the tailbone <NUM>, that is, an extension direction facing away from the third surface <NUM>. In this embodiment, the first included angle α is <NUM> degrees, and in other embodiments, the first included angle α may alternatively be greater or less than <NUM> degrees. A size of the first tailbone <NUM> in its extension direction is <NUM> to <NUM>.

The support body <NUM> and the tailbones <NUM> together enclose mounting recesses A. The support body <NUM> is a bottom wall of the mounting recess A, with the first support surface <NUM> being a surface of the bottom wall of the mounting recess A, and the first protrusion surface <NUM> of the tailbone <NUM> is a side surface of the mounting recess A. The mounting recesses A are configured to mount the decorative part <NUM>.

Referring to <FIG> is a schematic structural diagram of the decorative part <NUM> in the housing assembly <NUM> shown in <FIG>.

In this embodiment, the decorative part <NUM> is made of vegan leather. Vegan leather refers to polyurethane leather. The decorative part <NUM> made of polyurethane has good appearance and texture, comfortable touch, skin-friendly characteristic, good wear resistance and aging resistance, and light weight, which is conducive to light-weighting of the electronic device <NUM>. In other embodiments, the decorative part <NUM> may alternatively be made of artificial leather such as polyethylene or polyvinyl chloride. The decorative part <NUM> may alternatively be made of animal leather. Animal leather includes but is not limited to cattle hide, sheep skin, horsehide, and pigskin. The decorative part <NUM> made of animal leather has good appearance and texture, comfortable touch, and skin-friendly characteristic, which can improve user experience. The decorative part <NUM> may alternatively be made of silica gel. The decorative part <NUM> made of silica gel has low cost, good chemical stability, and high mechanical strength. The decorative part <NUM> may alternatively be made of leather texture vegetation. Leather texture vegetation is made of vegetation fiber. The decorative part <NUM> made of leather texture vegetation has excellent wear resistance and aging resistance, with advantages of sterilization, mildew-proofing, and environment-friendliness.

The decorative part <NUM> includes a first decorative segment <NUM> and second decorative segments <NUM>. The second decorative segment <NUM> is connected to an outer edge of the first decorative segment <NUM>. After the second decorative segments <NUM> and the first decorative segment <NUM> are connected, surfaces of them facing one same direction together form a first decorative part surface <NUM> and surfaces of them facing the other same direction together form a second decorative part surface <NUM>, which are surfaces of the decorative part <NUM>, with the first decorative part surface <NUM> and the second decorative part surface <NUM> facing away from each other. The second decorative segments <NUM> are located on a same side of the decorative part <NUM>, with the second decorative segments <NUM> curved along the first decorative part surface <NUM> towards the second decorative part surface <NUM>. The second decorative segments <NUM> are arc-shaped. The decorative part <NUM> further includes decorative part end surfaces <NUM>. The decorative part end surface <NUM> is located at an end of the second decorative segment <NUM>, with the decorative part end surface <NUM> connected between the first decorative part surface <NUM> and the second decorative part surface <NUM>.

Referring to <FIG>, <FIG> is a schematic structural diagram of the rear cover <NUM> in the housing assembly <NUM> shown in <FIG>.

The rear cover <NUM> includes the decorative part <NUM> and the support <NUM>, where the decorative part <NUM> is mounted in the mounting recesses A of the support <NUM> and is fixedly connected to the support <NUM>. The first decorative segment <NUM> is put right against the first support segment <NUM>, and the second support segment <NUM> is put right against the second decorative segment <NUM>, with the second decorative part surface <NUM> of the decorative part <NUM> facing the first support surface <NUM> of the support <NUM>. The support <NUM> is used to support the decorative part <NUM>. The "right against" herein means projection coincidence in a thickness direction (that is, the direction Z) of the housing assembly <NUM>.

The decorative part end surface <NUM> of the decorative part <NUM> is opposite the first protrusion surface <NUM> of the tailbone <NUM>. In this embodiment, the decorative part end surface <NUM> abuts against the first protrusion surface <NUM>, meaning that an abutting force exists between the decorative part end surface <NUM> and the first tai protrusion lbone surface <NUM> to ensure stability of connection between the decorative part end surface <NUM> and the first protrusion surface <NUM>. In another implementation, the decorative part end surface <NUM> and the first protrusion surface <NUM> may alternatively be indirectly connected by a bonding agent or other means. Alternatively, a very small gap may be present between the decorative part end surface <NUM> and the first protrusion surface <NUM>, and a size of the gap is <NUM> to <NUM>. That is, a distance from the first protrusion surface <NUM> to the decorative part end surface <NUM> is <NUM> to <NUM>.

The protrusion end surface <NUM> is flush with the first decorative part surface <NUM> located on the second decorative segment <NUM>. That is, there is no gap or a very small gap (within an assembly tolerance range) present between the protrusion end surface <NUM> and the first decorative part surface <NUM> located on the second decorative segments <NUM>, and smooth transition is present between the protrusion end surface <NUM> and the first decorative part surface <NUM> located on the second decorative segments <NUM>. In this application, the smooth transition present between two surfaces may be understood as that a drop between one surface and another surface is less than or equal to <NUM>, and an included angle between a tangent plane of the one surface and that of the another surface at a relative position is less than or equal to <NUM> degrees. Alternatively, one surface and another surface can be coplanar. In other words, the one surface is in a same plane as the another surface; or a tangent plane of the one surface is continuous with that of the another surface. In some implementations, a drop between one surface and another surface may alternatively be less than or equal to <NUM>, so as to improve appearance consistency and smoothness of the housing assembly. The "smooth transition" mentioned below can be understood in the same way.

In this embodiment, a drop between the protrusion end surface <NUM> and the first decorative part surface <NUM> located on the second decorative segment <NUM> is less than or equal to <NUM>, and an included angle between a tangent plane of the protrusion end surface <NUM> and that of the first decorative part surface <NUM> located on the second decorative segment <NUM> is less than or equal to <NUM> degrees. In an implementation, the protrusion end surface <NUM> and the first decorative part surface <NUM> located on the second decorative segment <NUM> may alternatively be coplanar, with the surface being a curved surface. Certainly, the protrusion end surface <NUM> and the first decorative part surface <NUM> located on the second decorative segment <NUM> may alternatively be roughly curved (with a little deviation allowed). In this embodiment, the tailbone <NUM> provides protection for the second decorative segment <NUM> and the decorative part end surface <NUM> of the decorative part <NUM>, which can prevent the decorative part <NUM> from curling or damage from an end close to the decorative part end surface <NUM> that affects aesthetics of the rear cover <NUM> and user experience. In addition, the smooth transition is present without a gap between the first decorative part surface <NUM> and the protrusion end surface <NUM>, which can reduce a scratchy feel and further increase aesthetics of the rear cover <NUM>.

Referring to <FIG> and <FIG>, the rear cover <NUM> further includes a first bonding member <NUM>. The first bonding member <NUM> is disposed between the first support surface <NUM> and the second decorative part surface <NUM> and bonds the support <NUM> and the decorative part <NUM>, so that the decorative part <NUM> and the support <NUM> are fixedly connected. In this embodiment, the first bonding member <NUM> is hot melt adhesive. Hot melt adhesive melts when heated and can be cured at room temperature with fast bonding performance, high bonding strength, and a wide range of bonding materials. In other embodiments, the first bonding member <NUM> may alternatively be double-sided adhesive or other glues, provided that fixed connection between the decorative part <NUM> and the support <NUM> is implemented.

Referring to <FIG>, the rear cover <NUM> is mounted to the middle frame <NUM>, with the second support surface <NUM> of the support <NUM> facing the first surface <NUM> of the middle frame <NUM>. The support body <NUM> is put right against the middle frame body <NUM> of the middle frame <NUM>, with the tailbone <NUM> opposite the border frame <NUM>.

The second support segment <NUM> of the support <NUM> is stacked with the first side surface <NUM> of the middle frame <NUM> and extends towards inside the groove a in a bending direction of the first side surface <NUM>. An end of the second support segment <NUM> connected to the tailbone <NUM> is located in the groove a and disposed opposite the avoidance part <NUM>. The tailbone <NUM> is partially located in the groove a and extends away from the groove a along the border frame inner surface <NUM> of the border frame <NUM>, with the second protrusion surface <NUM> opposite the border frame inner surface <NUM> and the border frame top surface <NUM>. Smooth transition is present between the protrusion end surface <NUM> and the border frame outer surface <NUM>. This can be understood as that a drop between the protrusion end surface <NUM> and the border frame outer surface <NUM> is less than or equal to <NUM>, and an included angle between a tangent plane of the protrusion end surface <NUM> and that of the border frame outer surface <NUM> is less than or equal to <NUM> degrees. For example, the drop between the protrusion end surface <NUM> and the border frame outer surface <NUM> may alternatively be less than or equal to <NUM>. In an implementation, the protrusion end surface <NUM> and the border frame outer surface <NUM> may alternatively be coplanar, with the surface being a curved surface and the protrusion end surface <NUM> extending towards the border frame outer surface <NUM>. Certainly, the protrusion end surface <NUM> and the border frame outer surface <NUM> may alternatively be roughly on one curved surface (with a little deviation allowed).

In this embodiment, the tailbone <NUM> is provided on the support <NUM> and smooth transition is present between the protrusion end surface <NUM> and the border frame outer surface <NUM>, so as to ensure smooth transition between the rear cover <NUM> and the middle frame <NUM>, increasing aesthetics of the housing assembly <NUM> and reducing a scratchy feel. In addition, with the tailbones <NUM> provided on the support <NUM>, a gap between the rear cover <NUM> and the middle frame <NUM> can be reduced, increasing aesthetics of the housing assembly <NUM> and improving user experience.

A first gap B is present between the tailbone <NUM> and the border frame top surface <NUM> of the border frame <NUM>, with a maximum size of the first gap B in the direction Z being L1. In this embodiment, L1 is <NUM>. In other embodiments, L1 may alternatively be less than <NUM> or slightly greater than <NUM>. A minimum distance between the tailbone <NUM> and the border frame <NUM> is <NUM> to <NUM>. That is, a minimum distance between the border frame top surface <NUM> and the second protrusion surface <NUM> is <NUM> to <NUM>. In an implementation, glue is provided in the first gap B. The glue located in the first gap B bonds the tailbone <NUM> and the border frame <NUM>, so as to further increase stability of connection between the tailbone <NUM> and the border frame <NUM>. The glue also closes the first gap B to avoid external dust or moisture into the first gap B and the groove a. In addition, the glue provided in the first gap B can also further reduce a scratchy feel.

Referring to <FIG> and <FIG>, the housing assembly <NUM> further includes a second bonding member <NUM>. The second bonding member <NUM> includes a first bonding surface <NUM> and a second bonding surface <NUM>, where the first bonding surface <NUM> and the second bonding surface <NUM> face away from each other. The second bonding member <NUM> is located between the middle frame <NUM> and the support <NUM>, with the first bonding surface <NUM> bonded to the first surface <NUM> of the middle frame <NUM> and the second bonding surface <NUM> bonded to the second support surface <NUM> of the support <NUM>, so as to implement fixed connection between the support <NUM> and the middle frame <NUM>, and then implement fixed connection between the rear cover <NUM> and the middle frame <NUM>. In this embodiment, the second bonding member <NUM> is foam tape. A substrate of the foam tape includes but is not limited to ethylene-vinyl acetate copolymer (EVA) or polyethylene (PE) foam, and adhesive is applied on two sides of the substrate that face away from each other. A foam substrate is elastic. As foam tape, the second bonding member <NUM> can play a function of buffering, which can prevent the middle frame <NUM> and the rear cover <NUM> from being pressed against each other to cause damage to the middle frame <NUM> or the rear cover <NUM>. In other embodiments, the second bonding member <NUM> may alternatively be double-sided adhesive or other glues, provided that fixed connection between the support <NUM> and the middle frame <NUM> is implemented.

Referring to <FIG> is a flowchart of manufacturing the support <NUM> shown in <FIG>.

A manufacturing process of the support <NUM> includes the following steps:.

Referring to <FIG> is a schematic diagram of partial structure in a process of manufacturing a base support by using the manufacturing method shown in <FIG>.

In S1, the mold includes an upper mold <NUM> and a lower mold <NUM>, and the upper mold <NUM> is closed onto the lower mold <NUM>, with a molding groove <NUM> present between the upper mold <NUM> and the lower mold <NUM>. The molding groove <NUM> has the same shape and size as a base support 20a. The raw material plate is a fiber composite plate prepreg. The "fiber composite plate prepreg" mentioned herein refers to a combination of a resin matrix and a reinforcement, made by impregnating continuous fiber with the resin matrix under a specific condition.

In S2, the raw material plate is placed in the molding groove <NUM>, and the mold is heated and pressurized to turn the raw material plate into the base support 20a.

Referring to <FIG> is a partial structural schematic diagram of the base support 20a prepared by using the manufacturing method shown in <FIG>.

The base support 20a includes a base plate and base tailbones 22a. The base plate includes a first base support segment and second base support segments 212a. The second base support segment 212a is connected to an outer edge of the first base support segment. The second base support segments 212a are curved towards a same side as the first base support segment.

The base tailbone 22a is connected to an end of the second base support segment 212a away from the first base support segment. An included angle between an extension direction of the base tailbone 22a and an extension direction of the second base support segments 212a is <NUM> degrees to <NUM> degrees. In this embodiment, the included angle between the extension direction of the base tailbone 22a and the extension direction of the second base support segments 212a is <NUM> degrees, and in other embodiments, the included angle between the extension direction of the base tailbone 22a and the extension direction of the second base support segments 212a may alternatively be greater or less than <NUM> degrees. The tailbone <NUM> extends more than <NUM> in its extension direction.

Still referring to <FIG>, in S3, the base tailbone is cut along a first cutting line <NUM> to form the base support 20a into the support <NUM> (as shown in <FIG>). The base tailbone 22a after cutting forms the tailbone <NUM> of the support <NUM>. In this embodiment, a numerical control cutting mode is used to cut the base tailbone 22a, ensuring accuracy of cutting. The "numerical control cutting" mentioned herein refers to a workpiece instruction (or program) used to control a machine tool or equipment and is a new mode of control given in a numerical form.

In an implementation, the support <NUM> may alternatively be formed directly by pressing in one step. In this case, the molding in the mold is consistent with the support <NUM> in shape and size. This can simplify a preparation process and improve size accuracy of the support <NUM>.

Referring to <FIG> is a partial structural schematic diagram of a second implementation of the housing assembly <NUM> according to Embodiment <NUM> of this application.

This implementation differs from the implementation shown in <FIG> in that the protrusion end surface <NUM> slopes in a direction from the first protrusion surface <NUM> towards the second protrusion surface <NUM>, and that an included angle between the protrusion end surface <NUM> and the first protrusion surface <NUM> is an acute angle. In other words, the protrusion end surface <NUM> slopes relative to the first decorative part surface <NUM> towards inside the groove a. A protruding part of the tailbone <NUM> may also be reduced while the tailbone <NUM> provides protection for the decorative part <NUM> and the decorative part end surface <NUM> of the second decorative segments <NUM>, which further prevents the protrusion end surface <NUM> of the tailbone <NUM> from giving a scratchy feel, thereby improving user experience.

Referring to <FIG> and <FIG>, <FIG> is a partial structural schematic diagram of a third implementation of the housing assembly <NUM> according to Embodiment <NUM> of this application, and <FIG> is a schematic structural diagram of the support <NUM> in the housing assembly <NUM> shown in <FIG>.

This implementation differs from the first implementation shown in <FIG> in that the tailbones <NUM> further include extensions <NUM>. The extension <NUM> is connected to the protrusion c of the tailbone <NUM> and extends from the protrusion c towards a direction away from the support body <NUM>. In other words, the extension <NUM> is protrusively formed on the second protrusion surface <NUM> of the tailbone <NUM>. The extension <NUM> includes an extension bottom surface <NUM> and an extension side surface <NUM>. The extension side surface <NUM> is connected to the protrusion end surface <NUM>, with the extension side surface <NUM> and the protrusion end surface <NUM> facing a same direction and flush with each other. This can be understood as that the extension side surface <NUM> and the protrusion end surface <NUM> are on a same surface.

After the support <NUM> is assembled with the middle frame <NUM>, the extension bottom surface <NUM> is parallel to the border frame top surface <NUM>, with the extension <NUM> extending towards the border frame <NUM>. Certainly, the extension bottom surface <NUM> may alternatively have a tilt angle (within a tolerance range) relative to the border frame top surface <NUM>. Smooth transition is present between the extension side surface <NUM> and the border frame outer surface <NUM>. This can be understood as that a drop between the extension side surface <NUM> and the border frame outer surface <NUM> is less than or equal to <NUM>, and an included angle between a tangent plane of the extension side surface <NUM> and that of the border frame outer surface <NUM> is less than or equal to <NUM> degrees. For example, the drop between the extension side surface <NUM> and the border frame outer surface <NUM> may alternatively be less than or equal to <NUM>. In an implementation, the extension side surface <NUM> and the border frame outer surface <NUM> may alternatively be coplanar. A second gap C is present between the extension <NUM> and the border frame top surface <NUM> of the border frame <NUM>, and the second gap C is the gap between the extension bottom surface <NUM> and the border frame top surface <NUM>. A maximum size of the second gap C in the direction Z is L2. L2 is <NUM> to <NUM>. In this embodiment, L2 is <NUM>.

As shown in <FIG> is a partial structural schematic diagram of the housing assembly <NUM> shown in <FIG>, and <FIG> is a partial structural schematic diagram of the housing assembly <NUM> shown in <FIG>. In this application, the provided extensions <NUM> can further reduce a gap between the support <NUM> and the border frame <NUM> on a basis of the embodiment shown in <FIG>, increasing aesthetics of the housing assembly <NUM> and reducing dust and moisture into the gap between the support <NUM> and the border frame <NUM>.

In this embodiment, a manufacturing process of the support <NUM> includes the following steps:.

Referring to <FIG> is a partial structural schematic diagram in a process of preparing the support <NUM> shown in <FIG>, and <FIG> is a partial structural schematic diagram of a base support 20a formed in the process of preparing the support <NUM> shown in <FIG>.

In step (<NUM>), the mold includes an upper mold <NUM> and a lower mold <NUM>, and the upper mold <NUM> is closed onto the lower mold <NUM>, with a molding groove <NUM> present between the upper mold <NUM> and the lower mold <NUM>. The molding groove <NUM> has the same shape and size as the base support 20a. The raw material plate is a fiber composite plate prepreg. The "fiber composite plate prepreg" mentioned herein refers to a combination of a resin matrix and a reinforcement, made by impregnating continuous fiber with the resin matrix under a specific condition.

The base support 20a includes a base plate and base tailbones 22a. The base plate includes a first base support segment and second base support segments 212a. The second base support segments 212a are separately connected to outer edges of the first base support segment. The second base support segments 212a are curved towards a same side as the first base support segment.

The base tailbone 22a includes a first part 221a, a second part 222a and a first connecting part 223a, where the first connecting part 223a is connected between the first part 221a and the second part 222a, a thickness of the first part 221a is less than that of the second part 222a, and a thickness of the first connecting part 223a increases gradually from the first part 221a to the second part 222a. An end of the first connecting part 223a connected to the first part 221a has the same thickness as the first part 221a. An end of the first connecting part 223a connected to the second part 222a has the same thickness as the second part 222a. The first part 221a is fixedly connected to the second base support segments 212a, with an included angle between an extension direction of the base tailbone 22a and an extension direction of the second base support segments 212a being <NUM> degrees to <NUM> degrees. In this embodiment, the included angle between the extension direction of the base tailbone 22a and the extension direction of the second base support segments 212a is <NUM> degrees.

Still referring to <FIG>, in step (<NUM>), the base tailbone 22a is cut along a first cutting line <NUM> to form the base support 20a into the support <NUM> (as shown in <FIG>), where the first cutting line <NUM> is perpendicular to the extension direction of the base tailbone 22a. That is, the tailbone <NUM> is obtained after the second part 222a is cut off in step (<NUM>).

In this embodiment, a numerical control cutting mode is used to cut the base tailbone 22a, ensuring accuracy of cutting. The "numerical control cutting" mentioned herein refers to a workpiece instruction (or program) used to control a machine tool or equipment and is a new mode of control given in a numerical form.

Referring to <FIG> is a schematic diagram of partial structure in a process of preparing the support <NUM> shown in <FIG> by using another manufacturing method, and <FIG> is a schematic diagram of partial structure of a to-be-cut component 20b formed in the process of preparing the support <NUM> shown in <FIG> by using the another manufacturing method.

As shown in <FIG>, the upper mold <NUM> and the lower mold <NUM> are used to press the raw material plate to form the to-be-cut component 20b.

As shown in <FIG>, the to-be-cut component 20b includes a second base plate and to-be-cut tailbones 22b. The second base plate has the same structure as the first base plate of the base support 20a in the foregoing embodiment. The to-be-cut tailbones 22b are connected to outer edges of the second base plate, with extension directions of the to-be-cut tailbones 22b located on a same side of the second base plate. In this embodiment, thicknesses of the to-be-cut tailbones 22b both are greater than a thickness of the second base plate.

In step (<NUM>), the to-be-cut tailbone 22b is first cut along a third cutting line <NUM> to form a base support 20a (as shown in <FIG>), and the base tailbone 22a of the base support 20a is formed after the to-be-cut tailbones 22b is cut. The third cutting line <NUM> includes three consecutive cutting line sections, with a first section of the third cutting line <NUM> parallel to the direction X, a second section of the third cutting line <NUM> parallel to an extension direction of the base tailbone 22a, and a third section of the third cutting line <NUM> parallel to the first section of cutting line.

As shown in <FIG>, the base support 20a is then cut as follows: The base tailbone 22a is cut along a first cutting line <NUM> to form the base support 20a into the support <NUM> (as shown in <FIG>).

Referring to <FIG> is a schematic structural diagram of a base support 20a formed in a process of preparing the support <NUM> shown in <FIG> by using a third manufacturing method.

In this embodiment, the base support 20a includes a base plate and base tailbones 22a. The base tailbone 22a includes a first part 221a and a second part 222a, where the first part 221a and the second part 222a are fixedly connected, with an included angle between the first part 221a and the second part 222a being <NUM> degrees. The first part 221a is fixedly connected to an end of the base plate, with an included angle between an extension direction of the first part 221a and a surface of the base plate being <NUM> degrees and the second part 222a extending away from the base plate.

The base tailbones 22a are cut to form the support <NUM> (as shown in <FIG>). A first cutting line <NUM> includes two consecutive cutting line sections. A first section of the first cutting line <NUM> is located between the first part 221a and the second part 222a, with a first section of the first cutting line <NUM> parallel to the extension direction of the first part 221a. A second section of the first cutting line <NUM> is on the second part 222a and parallel to the direction X.

Referring to <FIG> is a schematic structural diagram of a fourth implementation of a support <NUM> in the housing assembly <NUM> according to Embodiment <NUM> of this application.

This implementation differs from the third implementation shown in <FIG> in that the extension <NUM> further includes a connecting surface <NUM>, the connecting surface <NUM> being connected between the extension side surface <NUM> and the extension bottom surface <NUM>. In this embodiment, the connecting surface <NUM> is a plane and is parallel to the direction Z. In other embodiments, the connecting surface <NUM> may alternatively be a curved surface. Alternatively, the connecting surface <NUM> may be a chamfer. The provided connecting surface <NUM> can prevent the extension side surface <NUM> and the extension bottom surface <NUM> from being directly connected to form a sharp angle that results in a scratchy feel and affects user experience.

Further reference may be made to <FIG>, which is a schematic structural diagram of a preparation process of the support <NUM> shown in <FIG>.

The support <NUM> shown in this embodiment can be obtained by further cutting the support <NUM> shown in <FIG> along first auxiliary cutting lines <NUM>. The first auxiliary cutting line <NUM> is on the extension <NUM> and parallel to the direction Z, with the first auxiliary cutting line <NUM> penetrating the extension side surface <NUM> and the extension bottom surface <NUM> of the extension <NUM>. A cut surface after the cutting along the first auxiliary cutting line <NUM> is the connecting surface <NUM>.

Referring to <FIG> is a partial structural schematic diagram of a housing assembly <NUM> according to Embodiment <NUM> of this application, and <FIG> is a schematic exploded structural diagram of the housing assembly shown in <FIG>.

In this embodiment, a middle frame <NUM> is made of the same material as the middle frame <NUM> in Embodiment <NUM>. The middle frame <NUM> includes a middle frame body <NUM> and a border frame <NUM>. The middle frame body <NUM> is a rectangular plate. The middle frame body <NUM> includes a first surface <NUM> and a second surface <NUM>, the first surface <NUM> and the second surface <NUM> facing away from each other. The border frame <NUM> is connected to an outer edge of the middle frame body <NUM>, with the border frame <NUM> extending in a positive direction of the Z axis. The border frame <NUM> includes a border frame outer surface <NUM>, a border frame inner surface <NUM>, and a border frame top surface <NUM>. The border frame outer surface <NUM> and the border frame inner surface <NUM> face away from each other, both of which are parallel to the direction Z. The border frame outer surface <NUM> is perpendicularly connected to the second surface <NUM> of the middle frame body <NUM>, and the border frame inner surface <NUM> is perpendicularly connected to the first surface <NUM> of the middle frame body <NUM>. The border frame top surface <NUM> is fixedly connected to an end of the border frame inner surface <NUM> away from the middle frame body <NUM> and extends from the border frame inner surface <NUM> towards the border frame outer surface <NUM>. An included angle between the border frame top surface <NUM> and the border frame inner surface <NUM> is <NUM> degrees. Certainly, the included angle between the border frame top surface <NUM> and the border frame inner surface <NUM> may alternatively be slightly greater or less than <NUM> degrees. The border frame <NUM> further includes a border arc surface <NUM>, where the border arc surface <NUM> is connected between the border frame top surface <NUM> and the border frame outer surface <NUM>. Herein, the border arc surface <NUM> can be understood as part of the border frame top surface <NUM>.

The border frame <NUM> and the middle frame body <NUM> together enclose an accommodating recess D. The first surface <NUM> is a bottom wall of the accommodating recess D and the border frame inner surface <NUM> is a side wall of the accommodating recess D. The accommodating recess D is configured to mount a rear cover <NUM>.

In this embodiment, a support <NUM> is made of the same material as the support <NUM> in Embodiment <NUM>. The support <NUM> includes a support body <NUM> and tailbones <NUM>.

Further reference may be made to <FIG> is a schematic structural diagram of the support <NUM> in the housing assembly <NUM> shown in <FIG>. The support body <NUM> includes a first support segment <NUM> and second support segments <NUM>. The second support segment <NUM> is connected to an outer edge of the first support segment <NUM>. The first support segment <NUM> includes a first surface <NUM> and a second surface <NUM>, the first surface <NUM> and the second surface <NUM> facing away from each other. The second support segment <NUM> includes a third surface <NUM> and a fourth surface <NUM>, the third surface <NUM> and the fourth surface <NUM> facing away from each other. The first surface <NUM> and the third surface <NUM> together form the first support surface <NUM>, with the first support surface <NUM> being a plane. The second surface <NUM> and the fourth surface <NUM> together form the second support surface <NUM>, with the second support surface <NUM> being a plane. That is, the support body <NUM> is of a rectangular plate structure.

The tailbone <NUM> is connected to an outer edge of the support body <NUM>, with the tailbone <NUM> perpendicular to the first support surface <NUM>. That is, the tailbone <NUM> extends in a positive direction of the Z axis. The tailbone <NUM> includes a support end b and a protrusion c. The support end b is connected to the second support segment <NUM>, and the protrusion c is connected to the support end b, with the protrusion c protruding from the third surface <NUM>. It should be noted that, in this embodiment, the support body <NUM>, the support end b and the protrusion c are an integrally formed component. Dotted lines in <FIG> are merely for ease of description and are actually not present.

The tailbone <NUM> further includes a first protrusion surface <NUM>, a second protrusion surface <NUM> and a protrusion end surface <NUM>. The first protrusion surface <NUM> and the second tailb protrusion one surface <NUM> face away from each other, with a height of the second protrusion surface <NUM> in the direction Z lower than that of the first protrusion surface <NUM> in the direction Z. In other words, an end of the second protrusion surface <NUM> away from the support body <NUM> is located in a negative direction of the Z axis of an end of the first protrusion surface <NUM> away from the support body <NUM>. The protrusion end surface <NUM> is connected between the first protrusion surface <NUM> and the second tailb protrusion one surface <NUM>. In this embodiment, the protrusion end surface <NUM> is a tilted surface, with an included angle between the protrusion end surface <NUM> and the first ta protrusion ilbone surface <NUM> being an acute angle and an included angle between the protrusion end surface <NUM> and the second protrusion surface <NUM> being an obtuse angle. That is, the protrusion end surface <NUM> tilts from the first protrusion surface <NUM> towards the second protrusion surface <NUM>. In other embodiments, the protrusion end surface <NUM> may alternatively be a curved surface.

The support body <NUM> and the tailbones <NUM> together enclose mounting recesses A. The first support surface <NUM> is a bottom wall of the mounting recess A, and the first protrusion surface <NUM> of the tailbone <NUM> is a side wall of the mounting recess A. The mounting recesses A are configured to mount a decorative part <NUM>.

Still referring to <FIG>, the decorative part <NUM> is made of the same material as the decorative part <NUM> in Embodiment <NUM>. In this embodiment, the decorative part is of a flat and straight plate structure. The decorative part <NUM> includes a first decorative part surface <NUM>, a second decorative part surface <NUM>, and decorative part end surfaces <NUM>. The first decorative part surface <NUM> and the second decorative part surface <NUM> face away from each other, both of which are parallel to the direction X and direction Y The decorative part end surface <NUM> is located at an outer edge of the first decorative part surface <NUM> and connected between the first decorative part surface <NUM> and the second decorative part surface <NUM>. In this embodiment, the decorative part end surface <NUM> is perpendicular to the direction X and direction Y That is, the decorative part end surface <NUM> is perpendicular to both the first decorative part surface <NUM> and the second decorative part surface <NUM>.

Referring to <FIG>, the decorative part <NUM> is mounted in the mounting recesses A of the support <NUM> and is fixedly connected to the support <NUM>. The second decorative part surface <NUM> of the decorative part <NUM> faces the first support surface <NUM> of the support <NUM>, and the decorative part end surface <NUM> is connected to the first protrusion surface <NUM>. In this embodiment, the decorative part end surface <NUM> abuts against the first protrusion surface <NUM>. In another implementation, the decorative part end surface <NUM> and the first protrusion surface <NUM> may alternatively be indirectly connected by a bonding agent or other means. Alternatively, a very small gap (within a tolerance range) may be present between the decorative part end surface <NUM> and the first protrusion surface <NUM>.

In this embodiment, an end of the protrusion end surface <NUM> connected to the first protrusion surface <NUM> is parallel to the first decorative part surface <NUM> in the direction Z, and the tailbone <NUM> provides protection for the decorative part <NUM> and the decorative part end surface <NUM>, which can prevent the decorative part <NUM> from curling or damage from an end close to the decorative part end surface <NUM> that affects aesthetics of the rear cover <NUM> and user experience. In addition, no gap or a very small gap (within a tolerance range) is present between the decorative part end surface <NUM> and the first protrusion surface <NUM>, which can prevent dust and moisture from entering between the support <NUM> and the decorative part <NUM> to affect assembly stability of the rear cover <NUM>. In addition, smooth transition is present without a gap between the first decorative part surface <NUM> and the protrusion end surface <NUM>, which can reduce a scratchy feel and further increase aesthetics of the rear cover <NUM>.

Still referring to <FIG>, the rear cover <NUM> further includes a first bonding member <NUM>. The first bonding member <NUM> is disposed between the first support surface <NUM> and the second decorative part surface <NUM> and bonds the decorative part <NUM> and the support <NUM>, so that the decorative part <NUM> and the support <NUM> are fixedly connected. In this embodiment, the first bonding member <NUM> is hot melt adhesive. Hot melt adhesive melts when heated and can be cured at room temperature with fast bonding performance, high bonding strength, and a wide range of bonding materials. In other embodiments, the first bonding member <NUM> may alternatively be double-sided adhesive or other glues, provided that fixed connection between the decorative part <NUM> and the support <NUM> is implemented.

The rear cover <NUM> is mounted in the accommodating recess D of the middle frame <NUM> and is fixedly connected to the middle frame <NUM>. The support body <NUM> is put right against the middle frame body <NUM> of the middle frame <NUM>, with the tailbone <NUM> opposite the border frame <NUM>. The second support surface <NUM> of the support <NUM> faces the first surface <NUM> of the middle frame <NUM>, and the second protrusion surface <NUM> faces the border frame inner surface <NUM>.

In this embodiment, with the tailbones <NUM> provided on the support <NUM>, a gap between the rear cover <NUM> and the middle frame <NUM> can be reduced, increasing aesthetics of the housing assembly <NUM>.

A first gap B is present between the second protrusion surface <NUM> of the tailbone <NUM> and the border frame inner surface <NUM> of the border frame <NUM>, with a maximum size of the first gap B in the direction X being <NUM>. In other embodiments, the maximum size of the first gap B in the direction X may alternatively be less than <NUM> or slightly greater than <NUM>.

In an implementation, glue is provided in the first gap B. The glue located in the first gap B bonds the tailbone <NUM> and the border frame <NUM>, so as to further increase stability of connection between the tailbone <NUM> and the border frame <NUM>. The glue also closes the first gap B to avoid external dust or moisture into the first gap B. In addition, the glue provided in the first gap B can also further reduce a scratchy feel.

Still referring to <FIG>, the housing assembly <NUM> further includes a second bonding member <NUM>. The second bonding member <NUM> includes a first bonding surface <NUM> and a second bonding surface <NUM>, where the first bonding surface <NUM> and the second bonding surface <NUM> face away from each other. The second bonding member <NUM> is located between the middle frame <NUM> and the support <NUM>, with the first bonding surface <NUM> bonded to the first surface <NUM> of the middle frame <NUM> and the second bonding surface <NUM> bonded to the second support surface <NUM> of the support <NUM>, so that the support <NUM> and the middle frame <NUM> are fixedly connected, and then the rear cover <NUM> and the middle frame <NUM> are fixedly connected.

In this embodiment, the second bonding member <NUM> is foam tape. A substrate of the foam tape includes but is not limited to ethylene-vinyl acetate copolymer (EVA) or polyethylene (PE) foam, and adhesive is applied on two sides of the substrate that face away from each other. A foam substrate is elastic. As foam tape, the second bonding member <NUM> can play a function of buffering, which can prevent the middle frame <NUM> and the rear cover <NUM> from being pressed against each other to cause damage to the middle frame <NUM> or the rear cover <NUM>. In other embodiments, the second bonding member <NUM> may alternatively be double-sided adhesive or other glues, provided that fixed connection between the support <NUM> and the middle frame <NUM> is implemented.

Referring to <FIG> is a schematic diagram of partial structure of a housing assembly <NUM> according to another implementation of Embodiment <NUM> of this application. <FIG> is a schematic structural diagram of a support <NUM> in the housing assembly <NUM> shown in <FIG>.

This housing assembly <NUM> differs from the housing assembly <NUM> shown in <FIG> in that the tailbone <NUM> further includes an extension <NUM>, with the extension <NUM> connected to the protrusion c and extending from the protrusion c towards a direction away from the support body <NUM>. The tailbone <NUM> includes a first protrusion surface <NUM>, a second protrusion surface <NUM> and a protrusion end surface <NUM>. The first protrusion surface <NUM> and the second protrusion surface <NUM> face away from each other and flush with each other in the direction Z. The protrusion end surface <NUM> is connected to the first protrusion surface <NUM> and parallel to the direction X. The extension <NUM> is protrusively formed on the second protrusion surface <NUM> of the tailbone <NUM>. The extension <NUM> includes an extension bottom surface <NUM> and an extension side surface <NUM>. The extension side surface <NUM> is connected to the protrusion end surface <NUM>, and opposite ends of the extension bottom surface <NUM> are connected to the extension side surface <NUM> and the second protrusion surface <NUM> respectively.

In this embodiment, a size of the extension bottom surface <NUM> in the direction X is <NUM> to <NUM>. That is, a maximum size of the extension <NUM> protruding from the second protrusion surface <NUM> is <NUM> to <NUM>. When the rear cover <NUM> is mounted to the middle frame <NUM>, the extension <NUM> extends from the tailbone <NUM> to the border frame <NUM>, with the extension bottom surface <NUM> opposite the border frame top surface <NUM>. The extension <NUM> provides shielding for the first gap B, which can avoid external dust or moisture into the first gap B to affect stability of connection between the rear cover <NUM> and the middle frame <NUM>. In addition, aesthetics of the housing assembly <NUM> can also be increased.

In this implementation, the extension side surface <NUM> is a tilted surface. In another implementation, the extension side surface <NUM> may alternatively be a curved surface. When the extension side surface <NUM> is a curved surface, the extension side surface <NUM> smoothly transits to the border arc surface <NUM>. This can be understood as that a drop between the extension side surface <NUM> and the border arc surface <NUM> is less than or equal to <NUM>, and an included angle between a tangent plane of the extension side surface <NUM> and that of the border arc surface <NUM> is less than or equal to <NUM> degrees. For example, the drop between the extension side surface <NUM> and the border arc surface <NUM> may alternatively be less than or equal to <NUM>. In an implementation, the extension side surface <NUM> and the border arc surface <NUM> may alternatively be coplanar, with the surface being a curved surface and the extension side surface <NUM> extending towards the border arc surface <NUM> and smoothly transiting to the border arc surface <NUM>. This can increase aesthetics and smoothness of the housing assembly <NUM>, reduce a scratchy feel from the housing assembly <NUM>, and improve user experience. Certainly, the extension side surface <NUM> and the border arc surface <NUM> may alternatively be roughly on one curved surface (with a little deviation allowed).

In an implementation, the extension <NUM> further includes a connecting surface <NUM>. The connecting surface <NUM> is connected between the extension side surface <NUM> and the extension bottom surface <NUM>. In this embodiment, the connecting surface <NUM> is a plane and is parallel to the direction Z. In other embodiments, the connecting surface <NUM> may alternatively be a curved surface. Alternatively, the connecting surface <NUM> may be a chamfer. The provided connecting surface <NUM> can prevent the extension side surface <NUM> and the extension bottom surface <NUM> from being directly connected to form a sharp angle that results in a scratchy feel and affects user experience.

As shown in <FIG>, in step (<NUM>), the mold includes an upper mold <NUM> and a lower mold <NUM>, and the upper mold <NUM> is closed onto the lower mold <NUM>, with a molding groove <NUM> present between the upper mold <NUM> and the lower mold <NUM>. The molding groove <NUM> has the same shape and size as the base support 20a. The raw material plate is a fiber composite plate prepreg. The "fiber composite plate prepreg" mentioned herein refers to a combination of a resin matrix and a reinforcement, made by impregnating continuous fiber with the resin matrix under a specific condition.

As shown in <FIG>, the base support 20a includes a base plate and base tailbones 22a. The base tailbone 22a includes a first part 221a and a second part 222a, where the first part 221a and the second part 222a are connected, with an included angle between the first part 221a and the second part 222a being <NUM> degrees. The first part 221a is fixedly connected to an end of the base plate, with an included angle between an extension direction of the first part 221a and a surface of the base plate being <NUM> degrees, an extension direction of the second part 222a being parallel to the surface of the base plate, and the second part 222a extending away from the base plate.

In step (<NUM>), the base tailbone 22a is cut along a first cutting line <NUM> to form the base support 20a into the support <NUM> (as shown in <FIG>), where the first cutting line <NUM> is on the second part 222a, and an included angle between the first cutting line <NUM> and a positive direction of the X axis is an acute angle. The base tailbone 22a is cut to form the tailbone <NUM> of the support <NUM>.

In an implementation, in step (<NUM>), after the base tailbone 22a is cut along the first cutting line <NUM>, the base tailbone may be further cut along a first auxiliary cutting line, so that the extension <NUM> of the obtained support <NUM> includes the connecting surface <NUM>.

Referring to <FIG> and <FIG>, <FIG> is a partial structural schematic diagram of a housing assembly according to Embodiment <NUM> of this application, and <FIG> is a partial structural schematic diagram of the housing assembly shown in <FIG> from another perspective.

This embodiment differs from the embodiment shown in <FIG> in that the support <NUM> includes the support body <NUM> and tailbones <NUM>, where the tailbones <NUM> include two first sub-tailbones <NUM> and two second sub-tailbones <NUM>. The second support segments <NUM> include two first sub-support segments <NUM> and two second sub-support segments <NUM>, with the first sub-support segments <NUM> curved relative to the first support segment <NUM>. That is, two opposite ends of the second support segments <NUM> in the direction X are curved relative to the first support segment <NUM> towards the middle frame <NUM>, while two opposite ends of the second support segments <NUM> in the direction Y are flat and straight. The two first sub-support segments <NUM> are connected to two opposite ends of the first support segment <NUM> in the direction X, and one such first sub-tailbone <NUM> is connected to an end of one such first sub-support segment <NUM> away from the first support segment <NUM>. The two second sub-support segments <NUM> are connected to two opposite ends of the first support segment <NUM> in the direction Y, and one such second sub-tailbone <NUM> is connected to an end of one such second sub-support segment <NUM> away from the first support segment <NUM>. The two first sub-tailbones <NUM> and the two second sub-tailbones <NUM> are connected head to tail to form the tailbones <NUM>, and the two first sub-tailbones <NUM> and the two second sub-tailbones <NUM> are integrally formed. In this embodiment, each first sub-tailbone <NUM> may be connected to an adjacent second sub-tailbone <NUM> through a chamfer, so that the first sub-tailbone <NUM> transits smoothly to the adjacent second sub-tailbone <NUM>.

The decorative part <NUM> includes a first decorative segment <NUM> and second decorative segments <NUM>, where the second decorative segments <NUM> are connected to outer edges of the first decorative segment <NUM> respectively, with the second decorative segments <NUM> located on two opposite ends of the first decorative segment <NUM> in the direction X being curved relative to the first decorative segment <NUM>, and the second decorative segments <NUM> located on two opposite ends of the first decorative segment <NUM> in the direction Y being flat and straight. The decorative part <NUM> includes two third end surfaces <NUM> and two fourth end surfaces <NUM>. The two third end surfaces <NUM> are located at two opposite ends of the decorative part <NUM> in the direction X respectively, and the two fourth end surfaces <NUM> are located at two opposite ends of the decorative part <NUM> in the direction Y respectively.

The decorative part <NUM> is mounted on the support <NUM> and is fixedly connected to the support <NUM>. The first decorative segment <NUM> is put right against the first support segment <NUM>, and the second decorative segments <NUM> are put right against the second support segments <NUM>. The two third end surfaces <NUM> are connected to the two first sub-tailbones <NUM> respectively, and the two fourth end surfaces <NUM> are connected to the two second sub-tailbones <NUM> respectively.

In this embodiment, the first sub-tailbones <NUM> provide protection for the second support segments <NUM> and the third end surfaces <NUM> of the decorative part <NUM>, which can prevent the decorative part <NUM> from curling or damage from an end close to the third end surface <NUM>. The second sub-tailbones <NUM> provide protection for the first decorative segment <NUM> and the fourth end surfaces <NUM>, which can prevent the decorative part <NUM> from curling or damage from an end close to the fourth end surface <NUM> that affects aesthetics of the rear cover <NUM> and user experience.

The support <NUM> is mounted on the middle frame <NUM> and is fixedly connected to the middle frame <NUM>. With the tailbones <NUM> provided on the support <NUM>, a gap between the rear cover <NUM> and the middle frame <NUM> can be reduced, increasing aesthetics of the housing assembly <NUM>.

Referring to <FIG> is a partial structural schematic diagram of another implementation of the housing assembly according to Embodiment <NUM> of this application, and <FIG> is a partial structural schematic diagram of the housing assembly shown in <FIG> from another perspective.

In this embodiment, the tailbones <NUM> further include two first sub-extensions <NUM> and two second sub-extensions <NUM>. One such first sub-extension <NUM> is connected to a protrusion of one such first sub-tailbone <NUM> and extends from the corresponding protrusion towards a direction away from the support body <NUM>. One such second sub-extension <NUM> is connected to a protrusion of one such second sub-tailbone <NUM> and extends from the second sub-tailbone <NUM> towards a direction away from the support body <NUM>.

After the support <NUM> is assembled with the middle frame <NUM>, the first sub-extensions <NUM> extend towards the corresponding border frame <NUM>, with a maximum size of a gap between each first sub-extension <NUM> and the corresponding border frame <NUM> in the direction Z being <NUM> to <NUM>. In this embodiment, the maximum size of a gap between each first sub-extension <NUM> and the corresponding border frame <NUM> in the direction Z is <NUM>. The provided first sub-extensions <NUM> can further reduce a gap between the support <NUM> and the border frame <NUM>, increasing aesthetics of the housing assembly <NUM>.

The second sub-extensions <NUM> extend towards the border frame <NUM>. The second sub-extensions <NUM> provide shielding for a gap between the support <NUM> and the border frame <NUM>, which can avoid external dust or moisture into the gap to affect stability of connection between the rear cover and the middle frame <NUM>. In addition, aesthetics of the housing assembly <NUM> can also be increased.

In other embodiments, any part of the second support segments may be curved relative to the first support segment. For example, one end of the second support segments in the direction X is curved relative to the first support segment, and the other end of the second support segments in the direction X and two opposite ends of the second support segments in the direction Y are all flat and straight.

Claim 1:
A housing assembly (<NUM>), comprising a middle frame (<NUM>) and a rear cover (<NUM>), wherein
the rear cover (<NUM>) comprises a support (<NUM>) and a decorative part (<NUM>), the support (<NUM>) being made of a fiber reinforced resin material, the decorative part (<NUM>) being made of vegan leather, silica gel, leather texture vegetation, or animal leather;
the middle frame (<NUM>) comprises a middle frame body (<NUM>), an avoidance part (<NUM>) and a border frame (<NUM>), wherein the border frame (<NUM>) is connected to an outer edge of the middle frame body (<NUM>) by the avoidance part (<NUM>), a groove (a) is formed by the middle frame body (<NUM>), the avoidance part (<NUM>) and the border frame (<NUM>);
the support (<NUM>) comprises a support body (<NUM>), a support end (b) and a protrusion (c);
the support end (b) is connected to an outer edge of the support body (<NUM>);
the support end (b) is connected to the protrusion (c);
the support body (<NUM>) comprises a first support surface (<NUM>) and a second support surface (<NUM>), the first support surface (<NUM>) and the second support surface (<NUM>) facing away from each other; the protrusion (c) protruding from the first support surface (<NUM>), the support end or the protrusion (c) is partially located in the groove (a), a gap is present between the support end and the avoidance part (<NUM>); and
the decorative (<NUM>) part is mounted on the first support surface (<NUM>) with an end of the decorative part (<NUM>) connected to the protrusion (c); and the support (<NUM>) is mounted on the middle frame (<NUM>) with the second support surface (<NUM>) facing the middle frame (<NUM>).