Middle frame assembly and electronic equipment
By setting up a wire trough and a multi-zone bending structure in the middle frame assembly of the electronic device, the problem of insufficient strength of the middle frame assembly is solved, the durability and safety of the equipment are improved, and the strength and lightness are achieved.
Patent Information
- Application Number
- CN202411529021.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-01-10
AI Technical Summary
The midframe components of existing electronic equipment are insufficient in the face of drops, collisions and squeezes, making it difficult to ensure the durability and safety of the equipment.
A middle frame assembly is designed to prevent the thread trough from occupying the bending space by setting a line trough between the main body part and the bending part, and introducing multiple areas and transition areas of the bending connection in the bending part. Bending height and strength, while taking into account the lightweight design.
It effectively improves the strength and support capabilities of the midframe components, enhances the durability and safety of the equipment, and meets the requirements of functional structure implementation and product lightness and lightness.
Smart Images
Figure CN119300283A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of electronic devices, and in particular to a middle frame assembly and an electronic device. Background Art
[0002] The middle frame component of an electronic device usually refers to a structural component inside an electronic product, which provides support, protection and fixation of internal parts for the electronic device. The strength of the middle frame component plays a vital role in electronic devices, which is directly related to the durability, safety and reliability of the device. In today's fast-paced living environment, electronic devices are often faced with various risks of accidental falls, collisions and extrusions. At this time, the strength design of the middle frame component is particularly critical.
[0003] In view of this, how to ensure the strength of the middle frame assembly of electronic devices is a technical problem that needs to be solved urgently. Summary of the invention
[0004] The present application provides a middle frame assembly and an electronic device, wherein the middle frame assembly has high strength.
[0005] In a first aspect, a middle frame assembly is provided, comprising: a middle frame, comprising a main body and a bending portion located at an edge of the main body, the bending portion being bent along a first direction perpendicular to the main body; a plastic part, the plastic part being surrounded by the outer periphery of the main body and covered by the bending portion, a wire groove being provided on the first wall or the second wall of the plastic part, the first wall being a side wall of the plastic part facing the main body in the second direction, the second wall being a side wall of the plastic part away from the main body in the first direction, a distance between a side of the wire groove facing the bending portion and the bending portion in the second direction being greater than or equal to 0, and the second direction being perpendicular to the first direction.
[0006] The middle frame assembly provided in the embodiment of the present application, wherein the bent portion on the frame is used to improve the use strength of the middle frame assembly. The wire groove is set on the first wall or the second wall of the plastic part, and the distance between the wire groove and the bent portion is greater than or equal to 0, which can avoid occupying the space in the thickness direction of the plastic part, thereby avoiding the wire groove from compressing the height of the bent portion in the middle frame, and can take into account both the thin and light design requirements and the strength design of the middle frame assembly.
[0007] In combination with the first aspect, in certain implementations of the first aspect, the wire groove is arranged on the first wall of the plastic part, the depth direction of the wire groove is parallel to the second direction, and the distance between the side wall of the wire groove toward the main body in the first direction and the main body is less than or equal to the height of the bending portion.
[0008] By limiting the distance between the wire groove and the main body to be less than or equal to the height of the bending portion, and further limiting the wire groove to not occupy the bending space of the bending portion in the first direction, the bending height of the bending portion is not affected by the wire groove, and the strength of the middle frame assembly can be improved by increasing the bending height of the bending portion.
[0009] In combination with the first aspect, in certain implementations of the first aspect, in the first direction, a distance between the wire groove and the main body is greater than or equal to a distance between the wire groove and the second wall of the plastic component.
[0010] The wire groove formed on the first wall is limited to a position relatively far from the main body in the first direction of the plastic part, so as to facilitate the installation of the coaxial line and reduce the process requirements for product processing.
[0011] In combination with the first aspect, in certain implementations of the first aspect, in the first direction, a distance between an end surface of the wire groove facing the second wall of the plastic component and the second wall is greater than or equal to 0.5 mm.
[0012] In combination with the first aspect, in certain implementations of the first aspect, the wire groove is arranged on the second wall of the plastic part, the depth direction of the wire groove is parallel to the first direction, and the distance between the side wall of the wire groove facing the main body and the main body in the first direction is less than or equal to the height of the bending portion.
[0013] The wire groove is opened on the second wall and does not occupy the bending space of the bending portion in the first direction, so that the bending height of the bending portion is not affected by the wire groove, and the strength of the middle frame assembly can be improved by raising the bending portion of the bending portion.
[0014] In combination with the first aspect, in certain implementations of the first aspect, the bending portion includes two plates connected by a bend, the two plates are arranged along the second direction and extend along a third direction, and the third direction is perpendicular to the first direction and the second direction; in the third direction, the bending portion includes a first bending zone, a second bending zone, and a first transition zone between the first bending zone and the second bending zone; in the first bending zone, the two plates are in contact with each other, in the second bending zone, there is a constant first gap between the two plates, and in the first transition zone, there is a gradual second gap between the two plates.
[0015] There is a first transition zone between the first bending zone and the second bending zone of the bending portion, and the first transition zone enables the first bending zone and the second bending zone of the bending portion to smoothly transition and connect without cutting the bending portion. This structural design can further improve the strength of the middle frame assembly.
[0016] In combination with the first aspect, in certain implementations of the first aspect, in the third direction, the first bending zone includes a first sub-bending zone, a second sub-bending zone, and a second transition zone located between the first sub-bending zone and the second sub-bending zone; the first sub-bending zone and the second sub-bending zone are respectively located in different planes perpendicular to the second direction, and the second transition zone is used to connect the first sub-bending zone and the second sub-bending zone.
[0017] By setting the second transition zone, the first sub-bending zone and the second sub-bending zone located on different planes perpendicular to the second direction in the first bending zone can be smoothly transitioned and connected without cutting the bending portion. This structural design can further improve the strength of the middle frame assembly.
[0018] In combination with the first aspect, in certain implementations of the first aspect, in the second direction, the second sub-bending zone is concave toward the main body relative to the second bending zone and the first sub-bending zone.
[0019] The second sub-bending area concave toward the main body of the middle frame can reserve space for other functional components of electronic devices that may be installed on the middle frame assembly. The overall coherent bending portion structural design of the middle frame can improve the strength of the middle frame assembly while taking into account the functional structure of the middle frame assembly.
[0020] In combination with the first aspect, in certain implementations of the first aspect, in the first direction, the bent connection portion between the two plates in the first bending zone is concave toward the main body.
[0021] The indentation in the first direction in the first bending zone provides space for other components that may be installed on the middle frame assembly without reducing the bending height of other areas in the first bending zone, thereby improving the strength of the middle frame assembly.
[0022] In combination with the first aspect, in some implementations of the first aspect, a distance of the first gap in the second direction is greater than or equal to 1.0 mm.
[0023] The existence of a constant first gap between the two plates in the bending portion can improve the support strength of the support portion, thereby improving the strength of the middle frame assembly. An appropriate first gap value can take into account both the space occupancy planning and strength design considerations of the bending portion in the second direction.
[0024] In combination with the first aspect, in certain implementations of the first aspect, a distance between a side of the wire groove facing the bending portion and the bending portion in the second direction is at least 0.1 mm.
[0025] In combination with the first aspect, in certain implementations of the first aspect, a height of the bending portion in the first direction is greater than or equal to 2.9 mm.
[0026] In combination with the first aspect, in some implementations of the first aspect, the wire duct extends along a third direction.
[0027] In combination with the first aspect, in certain implementations of the first aspect, the shortest distance between the bent portion and a third wall of the plastic component facing away from the main body in the second direction is at least 0.05 mm.
[0028] Through the above implementation, the spatial structure of the plastic component in the second direction is simplified as much as possible, so as to provide required space for other components.
[0029] In combination with the first aspect, in certain implementations of the first aspect, the shortest distance between the bending portion and the third wall is 0.3-0.5 mm.
[0030] Through the above implementation, the shortest distance between the bending portion and the third wall can be made longer, and the partial structure of the plastic part covering the bending portion is coherent and more stable, thereby improving the strength of the plastic part and further improving the strength of the middle frame assembly.
[0031] In a second aspect, an electronic device is provided, comprising the middle frame assembly in the first aspect or each implementation of the first aspect.
[0032] In combination with the second aspect, in some implementations of the second aspect, the electronic device further includes: a mainboard, an antenna and a coaxial line, wherein the coaxial line is accommodated in a wire groove of the middle frame assembly and is used to connect the mainboard and the antenna.
[0033] The middle frame assembly and electronic device provided by the embodiment of the present application have the wire groove position opened on the first wall or the second wall of the plastic part, and avoid occupying the bending height space of the bending part in the middle frame in the first direction, so that the bending height of the bending part can be increased, thereby improving the strength of the middle frame assembly. The design of the first bending zone, the second bending zone, the first transition zone and the second transition zone of the bending part allows the bending part to achieve the size change of the main body in the middle frame in the second direction without cutting, and can provide space for the functional components installed on the middle frame assembly, and the bending part has a smooth transition and continuous connection. The structural design of the bending part can take into account the realization of the functional structure on the middle frame assembly and the strength design. In addition, the bending connection part of the first bending zone can also be concave toward the main body in the first direction, so that the bending part can provide the space required for other components in the first direction without reducing the bending height of other areas in the first bending zone. Further, it can take into account the realization of the functional structure of the middle frame assembly, the demand for product thin and light design and the strength design. BRIEF DESCRIPTION OF THE DRAWINGS
[0034] Figure 1 It is an exploded schematic diagram of a middle frame assembly provided in an embodiment of the present application.
[0035] Figure 2 It is a cross-sectional schematic diagram of a middle frame provided in an embodiment of the present application.
[0036] Figure 3 It is a cross-sectional schematic diagram of a middle frame assembly provided in an embodiment of the present application.
[0037] Figure 4 yes Figure 3A partial enlarged view of the middle C area.
[0038] Figure 5 It is a partially enlarged cross-sectional view of a middle frame assembly provided in an embodiment of the present application.
[0039] Figure 6 It is a partial enlarged cross-sectional view of another middle frame assembly provided in an embodiment of the present application.
[0040] Figure 7 It is a schematic diagram of a middle frame provided in an embodiment of the present application.
[0041] Figure 8 yes Figure 7 A partial enlarged view of the D area in the middle.
[0042] Fig. 9 It is a front view of a middle frame provided in an embodiment of the present application.
[0043] Fig.10 yes Fig. 9 A partial stereoscopic enlarged image of the F area in the middle.
[0044] Fig.11 yes Fig. 9 A partial enlarged view of the middle G area.
[0045] Fig.12 yes Fig.10 A partial enlarged view of the middle H area. DETAILED DESCRIPTION
[0046] The technical solution in this application will be described below in conjunction with the accompanying drawings.
[0047] In the description of this application, it should be noted that the terms "first", "second", etc. are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features.
[0048] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium.
[0049] The directional terms mentioned in the embodiments of the present application, such as "up", "down", "left", "right", "inside", "outside", etc., are only referenced to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. In addition, unless otherwise specified in the present application, the "multiple" described in the present application refers to two or more. "Vertical" is not vertical in the strict sense, but is within the allowable error range. "Parallel" is not parallel in the strict sense, but is within the allowable error range.
[0050] In the description of the embodiments of the present application, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.
[0051] In the embodiments of the present application, "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.
[0052] The present application relates to a middle frame of an electronic device. The electronic device may be a mobile phone, a tablet computer, a tablet computer accessory, a wearable device, a vehicle-mounted device, an augmented reality (AR) / virtual reality (VR) device, a laptop computer, an ultra-mobile personal computer (UMPC), a netbook, a personal digital assistant (PDA) and other mobile terminals, or may also be a digital camera, a SLR camera / micro-single camera, a sports camera, a PTZ camera, a drone and other professional shooting equipment. The embodiments of the present application do not impose any special restrictions on the specific form of the electronic device. For ease of understanding, the following description takes the electronic device as an example of a mobile phone.
[0053] As electronic devices are updated, battery life continues to improve, and device functions continue to be enriched. The demand for thin and light product appearance has led designers to embed some structures (such as coaxial cables of electronic devices, etc.) into the middle frame components of electronic devices to avoid occupying the internal space of the device. In addition, fingerprint recognition components, volume buttons and other functional components can also be embedded in the middle frame components, and the middle frame components need to take into account the realization of these functional structures, the demand for thin and light product design, and strength design.
[0054] refer to Figure 1 , Figure 1 1 is an exploded view of a middle frame assembly of an electronic device provided in an embodiment of the present application. In the embodiment of the present application, the middle frame assembly of the electronic device may include a middle frame 1 and a plastic part 2, wherein the plastic part 2 may be wrapped around the periphery of the middle frame 1 and embedded in a partial area of the middle frame 1.
[0055] In order to facilitate the description of the following embodiments, an O-xyz coordinate system is established for the middle frame assembly, wherein the thickness direction of the middle frame 1 or the plastic part 2 is defined as the z-axis direction, the width direction is defined as the x-axis direction, and the length direction is defined as the y-axis direction.
[0056] The first side A of the middle frame 1 in the z-axis direction is the installation side of the electronic device screen, and the second side B is the installation side of other components of the electronic device such as a battery, a mainboard, etc., and a bottom plate.
[0057] The middle frame 1 may be made of metal, such as aluminum alloy, and the forming process of the middle frame 1 may be stamping of aluminum alloy sheets. In practical applications, the metal material and forming process of the middle frame 1 may be selected based on actual conditions. Compared with the die-casting process, the stamping process has lower costs, higher quality of formed parts, and a wider range of material options, provided that the obtained middle frame can meet the strength requirements.
[0058] The plastic part 2 can be made of plastic material, and the molding process can be to use the middle frame 1 as a base, and to inject the plastic part 2 around its periphery, and the plastic part 2 and the middle frame 1 form an integral structure. The processing method of integral molding by injection molding simplifies the processing technology of the plastic part and reduces its manufacturing cost.
[0059] In the embodiment of the present application, the material type of the plastic part 2 can be various. In practical applications, those skilled in the art can choose according to specific needs. For example, the plastic part 2 can be one or more of polyphthalamide (PPA), polyamide (PA), polybutylene terephthalate (PBT), polyphenylene sulfide (PPS), polyetherether ketone (PEEK), polycarbonate (PC) and the like. It should be clear that when the plastic part 2 is a combination of multiple materials, for example, a combination of PPA and PA, the ratio between PPA and PA is not limited, and no matter what ratio is used between the two, the plastic body 1 is a mixture of two existing materials, PPA and PA, and should not be understood as a new material.
[0060] refer to Figure 2 , Figure 2 The middle frame provided in the embodiment of the present application is Figure 1 The middle frame 1 includes a main body 14 and a bent portion 15 located at the edge of the main body 14. The plastic part 2 ( Figure 2 The main body 14 (not shown) surrounds the main body 14 of the middle frame 1 and is covered by the bending portion 15. The main body 14 is a plate-like structure, and the bending portion 15 is bent along a first direction z perpendicular to the main body 14. In the embodiment of the present application, the first direction z can be the thickness direction of the main body 14 or the first direction z is the thickness direction of the middle frame 1.
[0061] Optionally, the bending portion 15 can be bent toward the second side B, so that the bending portion 15 has a higher bending height, which can improve the strength of the bending portion 15.
[0062] In some embodiments, the bending portion 15 includes at least two plates 151 connected by bending, and a bending connection portion 152 may exist between the two plates 151. The two plates 151 are arranged along the second direction x and extend along the third direction y. The second direction x is perpendicular to the first direction z, and the second direction x may be the width direction of the middle frame 1; the third direction y is perpendicular to the first direction z and the second direction x, and the third direction y may be the length direction of the middle frame 1.
[0063] The two plates 151 and the bent connection portion 152 in the bent portion 15 can be formed into a "U"-shaped structure by a metal plate bending process. The structural design of the bent portion 15 can enhance the strength of the middle frame assembly and reduce the possibility of bending and deformation of the electronic device during use.
[0064] In some related technologies, in order to facilitate the installation of the coaxial line, a wire groove is usually provided on the side wall of the plastic part 2 of the middle frame assembly away from the main body in the first direction z, and the opening position of the wire groove is located above the bent connecting part in the bent part. Figure 3 and Figure 4 shown. Figure 3 is a cross-sectional view of the middle frame assembly on the xOz plane. Figure 4 for Figure 3 A partial enlarged view of the middle C area.
[0065] Figure 3 and Figure 4 In the embodiment, the wire groove 201 is arranged on the second wall 21 of the plastic part 2 away from the main body 14 in the first direction z, and the coaxial line 3 is located in the wire groove 201. Considering the thin and light design requirements of the middle frame assembly of the electronic device, in practical applications, the thickness dimension design of the middle frame assembly is limited, and the above-mentioned opening method of the wire groove 201 occupies the space of the plastic part 2 in the thickness direction (z axis), so that the height of the two plates 151 of the bending part 15 in the middle frame 1 in the z axis direction is correspondingly compressed, that is, the bending height d1 of the bending part 15 is compressed, and the bending height d1 can be the distance between the bending connection part 152 and the main body 14 in the z axis direction.
[0066] In some applications, the bending height d1 of the bending portion 15 is about 2 mm, resulting in insufficient strength of the middle frame assembly and poor performance in strength tests (such as a three-point bending test, or a three-bar bending test). Therefore, the embodiment of the present application provides a middle frame assembly structure that can take into account the realization of some functional structures, the requirements of product lightweight design, and strength design.
[0067] Figure 5 A partial enlarged cross-sectional view of a middle frame assembly in the xOz direction provided in an embodiment of the present application. As shown in the figure, a wire groove 201 is provided on the first wall 22 of the plastic part 2. The first wall 22 can be a side wall of the plastic part 2 facing the main body 14 in the second direction x. The distance d2 between the side of the wire groove 201 facing the bending part 15 and the bending part 15 in the second direction x is greater than or equal to zero.
[0068] Optionally, the coaxial line 3 is located in the wire groove 201 , and the wire groove 201 and the coaxial line 3 extend along the third direction y.
[0069] According to this embodiment, the wire groove 201 is arranged on the side wall (i.e., the first wall 22) of the plastic part 2, so that the wire groove 201 does not occupy the height space of the plastic part 2. Therefore, the wire groove 201 does not occupy the bending space of the bending portion 15 in the plastic part 2, thereby avoiding compression of the bending height d1 of the bending portion 15. Furthermore, under the same design limitation of the thickness dimension of the middle frame component, the bending height d1 of the bending portion 15 is greater than that of the bending portion 15. Figure 4 The technical solution shown in can be improved, that is, the supporting capacity of the bending portion 15 can be improved. Optionally, when the distance d2 is greater than zero, the partial structure of the plastic part 2 wrapped around the bending portion 15 can be continuous, and the use strength of the plastic part 2 can be further improved. In summary, the strength of the middle frame assembly can be improved.
[0070] Optionally, a distance d2 between the side of the wire groove 201 facing the bending portion 15 and the bending portion 15 in the second direction x is at least 0.1 mm, so as to compress the space occupied in the second direction x while taking into account the strength design of the plastic part 2 .
[0071] Alternatively, if Figure 5 As shown, the depth direction of the wire groove 201 is parallel to the second direction x, and the distance d5 between the side wall of the wire groove 201 toward the main body 14 and the main body 14 in the first direction z is less than or equal to the height d1 of the bending portion 15, that is, the distance d5 between the wire groove 201 and the main body 14 is less than or equal to the bending height d1 of the bending portion 15, and the projections of the wire groove 201 and the bending portion 15 on the yOz plane may overlap.
[0072] Through this embodiment, when the thickness of the middle frame assembly is limited, the projections of the wire groove 201 and the bending portion 15 on the yOz plane can overlap, so that the bending portion 15 can fully utilize the thickness space of the plastic part 2 to avoid space waste, thereby improving the strength of the middle frame assembly.
[0073] Optionally, the height of the bending portion 15 in the first direction z is greater than or equal to 2.9 mm, that is, the bending height d1 of the bending portion 15 is greater than or equal to 2.9 mm.
[0074] Optionally, in the first direction z, the distance d5 between the wire groove 201 and the main body 14 is greater than or equal to the distance d4 between the wire groove 201 and the second wall 21 of the plastic part 2. That is, the wire groove 201 is provided at a position of the first wall 22 relatively far from the main body 14 in the first direction z. This wire groove provision method can facilitate the installation of the coaxial line 3 and reduce the process difficulty when the coaxial line 3 is installed on the middle frame assembly.
[0075] Optionally, in the first direction z, a distance d4 between an end surface of the wire groove 201 facing the second wall 21 of the plastic component 2 and the second wall 21 is greater than or equal to 0.5 mm.
[0076] In the embodiment of the present application, the plastic part 2 may further include a cavity 24 reserved for cooperating with other structures of the electronic device, such as a reverse plug structure, and the cavity 24 is provided on the third wall 23 of the plastic part 2 facing away from the main body 14 in the second direction x, and is concave toward the main body 14. It can be understood that the side wall of the cavity 24 facing the main body 14 can still be regarded as a part of the third wall 23.
[0077] Optionally, the shortest distance d10 between the bending portion 15 and the third wall 23 of the plastic part 2 facing away from the main body 14 in the second direction x is at least 0.05 mm. With this embodiment, the spatial structure of the plastic part 2 in the second direction x can be simplified as much as possible to provide required space for other components such as the bending portion 15 or the wire groove 201.
[0078] Alternatively, the shortest distance d10 between the bend portion 15 and the third wall 23 may also be 0.3-0.5 mm. With this embodiment, when the space of the plastic part 2 in the second direction x is relatively sufficient, the shortest distance between the bend portion 15 and the third wall 23 may be longer, so that the structure of the portion of the plastic part 2 wrapped around the bend portion 15 is coherent and more stable, which can improve the strength of the plastic part 2 and further improve the strength of the middle frame assembly.
[0079] In the embodiment of the present application, the coaxial line is a wire used to transmit electrical signals in an electronic device, the number of which is at least one, and is usually a cylindrical wire structure with a specific diameter. For example, the diameter of the coaxial line 3 in a smartphone may be 0.5mm-1.0mm. It should be understood that the dimensional values given in the embodiment of the present application are not the only limitation on the structure of the middle frame component. In actual application scenarios, the depth d3 of the wire groove 201 and the relative positions d2, d4, d5, etc. can be determined according to the number and diameter of the coaxial line 3.
[0080] Exemplarily, when the diameter of the coaxial line 3 is 0.64 mm, the distance d2 between the wire groove 201 and the bending portion 15 can be 0.3-0.5 mm; the depth d3 of the wire groove 201 can be 0.2 mm or 0.3 mm larger than the diameter of the coaxial line 3; the distance d4 between the wire groove 201 and the second wall 21 of the plastic part 2 can be 0.5-0.7 mm; the distance d9 between the bending portion 15 and the second wall 21 of the plastic part 2 can be 0.4 mm.
[0081] The bending height d1 of the bending portion 15 of the middle frame assembly provided in the embodiment of the present application can be greater than or equal to 2.9 mm. Figure 4 According to the technical solution shown in the figure, the wire groove 201 is changed from being opened on the second wall 21 of the plastic part 2 from the front to being opened on the first wall 22 of the plastic part 2 from the side, so as to avoid occupying the bending height space of the bending portion 15 in the plastic part 2. The bending height d1 of the bending portion can be increased by at least 0.9 mm, that is, the supporting capacity of the bending portion 15 is improved, thereby improving the strength of the middle frame assembly and performing well in the strength test.
[0082] In some cases, the wire groove 201 can still be opened on the second wall 21 of the plastic part 2, which can also avoid occupying the bending space of the bending portion 15. Figure 6 shown.
[0083] A wire groove 201 is disposed on the second wall 21 of the plastic part 2. The second wall 21 is a side wall of the plastic part 2 away from the main body 14 in the first direction z. A distance d2 between the wire groove 201 facing the bending portion 15 and the bending portion 15 in the second direction x is greater than or equal to zero.
[0084] Optionally, the coaxial line 3 is located in the wire groove 201 , and the wire groove 201 and the coaxial line 3 extend along the third direction y.
[0085] Through this embodiment, the wire groove 201 is still arranged on the second wall 21 of the plastic part 2, but the wire groove 201 does not occupy the height space of the plastic part 2. Therefore, the wire groove 201 does not occupy the bending space of the bending portion 15 in the plastic part 2, thereby avoiding the occurrence of Figure 4 The bending height d1 of the middle bending portion 15 is compressed. Further, under the same design limitation of the thickness dimension of the middle frame assembly, the bending height d1 of the bending portion 15 is reduced compared to Figure 4 The technical solution shown in can be improved, that is, the supporting capacity of the bending portion 15 is improved. Optionally, when the distance d2 is greater than zero, the partial structure of the plastic part 2 covering the bending portion 15 can be continuous, and the strength of the plastic part 2 can be improved. In summary, the strength of the middle frame assembly can be improved.
[0086] Alternatively, if Figure 6 As shown, the depth direction of the wire groove 201 is parallel to the first direction z, and the distance d5 between the side wall of the wire groove 201 toward the main body 14 and the main body 14 in the first direction z is less than or equal to the height d1 of the bending portion 15, that is, the distance d5 between the wire groove 201 and the main body 14 is less than or equal to the bending height d1 of the bending portion 15, and the projections of the wire groove 201 and the bending portion 15 on the yOz plane may overlap.
[0087] Through this embodiment, when the thickness of the middle frame assembly is limited, the projections of the wire groove 201 and the bending portion 15 on the yOz plane can overlap, so that the bending portion 15 can fully utilize the thickness space of the plastic part 2 to avoid space waste, thereby improving the strength of the middle frame assembly.
[0088] In addition to the wire ducts required for coaxial cable routing, the middle frame assembly of electronic devices usually needs to reserve space for functional components such as lock screen buttons, volume adjustment buttons or fingerprint recognition components, or to expand the space for the motherboard or battery, and compress the width of the bent connection part in the bent part on the two long sides of the middle frame to improve the use strength of the middle frame assembly. Figure 7 As shown, in some embodiments, the bending portion 15 may include a first bending zone 101 and a second bending zone 103 in the third direction y. The first bending zone 101 is usually obtained by flattening the bending portion 15 obtained by the bending process until the two plates therein are fitted together. The first bending zone 101 can provide installation space for other functional components embedded in the frame assembly of the electronic device. The second bending zone 103 may be a "U"-shaped structure formed by two plates that have not been flattened. In some related technologies, there is a process groove 102 between the first bending zone 101 and the second bending zone 103, that is, there is a discontinuity between the first bending zone 101 and the second bending zone 103.
[0089] Figure 8 for Figure 7 A partial enlarged view of the D area. Figure 8 As shown, the first bending zone 101 obtained by flattening includes two plates 151 that fit together, and the second bending zone 103 includes two plates 151 with a gap, and the gap can be the width d6 of the bending connection portion 152 of the second bending zone 103 in the second direction x. In some related technologies, there is usually a process groove 102 between the first bending zone 101 and the second bending zone 103, which is obtained by cutting and truncating the plate of the two plates 151 of the bending portion away from the main body 14 in the second direction x, so as to realize the transition between the first bending zone 101 and the second bending zone 103. However, after cutting and truncating the plate away from the main body 14 in the second direction x, the process groove 102 only includes one plate. This design makes the structure of the two plates 151 of the bending portion discontinuous at the process groove 102, which may cause stress concentration and local strength reduction. The middle frame assembly performs poorly in the strength test and may deform and bend during use.
[0090] A schematic front view of the middle frame 1 in the middle frame assembly provided in the embodiment of the present application is as follows Fig. 9 As shown, the bending portion 15 of the middle frame 1 includes at least a first bending area 101 and a second bending area 103 in the third direction y, and a first transition area 105 may exist between the first bending area 101 and the second bending area 103 .
[0091] refer to Fig.10 , Fig.10 for Fig. 9A magnified stereoscopic view of the middle F region. In some embodiments, the two plates 151 in the first bending zone 101 fit each other, in the second bending zone 103 , there is a constant first gap between the two plates 151 , and in the first transition zone 105 , there is a gradual second gap between the two plates.
[0092] like Fig.11 As shown, Fig.11 for Fig. 9 In the enlarged view of the middle G area, the first gap may be the width d6 of the bending connection portion 152 of the second bending zone 103 in the second direction x, and the second gap may be the width d7 of the bending connection portion 152 of the first transition zone 105 in the second direction x. The second gap d7 is gradual, and from the first bending zone 101 to the second bending zone 103, the second gap d6 gradually increases to be equal to the first gap d6. Optionally, the first gap d6 is greater than or equal to 1.0 mm.
[0093] The existence of a constant first gap d6 between the two plates 151 in the bending portion 15 can improve the support strength of the support portion 15, thereby improving the strength of the middle frame assembly. An appropriate value of the first gap d6 can take into account both the space occupation planning and strength design considerations of the bending portion 15 in the second direction x, that is, it can provide a certain support strength while shortening the space occupied by the plastic part in the second direction as much as possible, and reserve available space for other possible components.
[0094] The first transition zone 105 can enable a smooth transition and a continuous connection between the first bending zone 101 and the second bending zone 103 which have different processing techniques. The two plates 151 in the bending portion 15 are structurally continuous as a whole, and the middle frame assembly can have higher strength.
[0095] Return to see Fig.10 In the third direction y, the first bending zone 101 may further include a first sub-bending zone 107, a second sub-bending zone 106 and a second transition zone 104 located between the first sub-bending zone 107 and the second sub-bending zone 106; the first sub-bending zone 107 and the second sub-bending zone 106 are respectively located in different planes perpendicular to the second direction x, and the second transition zone 104 is used to connect the first sub-bending zone 107 and the second sub-bending zone 106.
[0096] In the embodiment of the present application, different planes perpendicular to the second direction x may be different yOz planes. There may be at least two sub-bending zones located on different yOz planes in the first bending zone 101, providing installation space for other electronic device functional components that may be embedded in the middle frame assembly, such as fingerprint recognition components. The second transition zone 104 can make the first sub-bending zone 107 and the second sub-bending zone 106 located on different planes perpendicular to the second direction x in the first bending zone 101 smoothly transition and connect, and the two plates 151 in the first bending zone 101 are continuous as a whole. The strength of the middle frame assembly can be further improved, while taking into account the realization of the functional structure of the middle frame assembly.
[0097] Optionally, the second sub-bending zone 106 is concave toward the main body 14 relative to the second bending zone 103 and the first sub-bending zone 107. In the second direction x, the concave second sub-bending zone 106 can provide space for other functional components to be installed on the middle frame assembly, such as a fingerprint recognition component.
[0098] It should be understood that in actual application scenarios, the various dimensional parameters of the first bending zone 101, the second bending zone 103, the first transition zone 105, the second transition zone 104, the first sub-bending zone 107 and the second sub-bending zone 106 in the bending portion 15, such as length, depth, angle, height, etc., can be adjusted according to actual needs, and the embodiments of the present application do not limit their dimensional parameters.
[0099] Exemplarily, in order to provide space for the installation of the electronic device motherboard, a first bending zone 101 can be set in the bending portion 15 of the middle frame 1; in order to provide space for the fingerprint recognition component, a second sub-bending zone 106 can be set in the first bending zone 101, and the second sub-bending zone 106 can be connected with the first sub-bending zone 107 in the first bending zone 101 through the second transition zone 104, and can also be connected with the unflattened second bending zone 103 through the first transition zone 105.
[0100] In the above design, the bending part of the middle frame includes at least two plates, and there is no need to cut process grooves, so as to achieve a smooth transition and continuous connection of the bending part as a whole, avoid stress concentration, improve the strength of the middle frame assembly, and make the middle frame assembly perform better in the strength test.
[0101] In some embodiments, the middle frame and the bottom plate of the electronic device can be connected by screws. In this case, the middle frame assembly also needs to provide space for the installation of the bottom plate screw columns. Fig.12 , Fig.12 (a) in Fig.10 A three-dimensional enlarged image of the H region in the middle, (b) Fig.10 Magnified plane view of the H region. Optionally, as Fig.12As shown, in the first direction z, the bent connection portion 152 between the two plates 151 in the first bending area 101 is concave toward the main body 14. The depth d8 of the concave portion can be the space required for the installation of the screw column. If the middle frame and the bottom plate are connected by other means, the middle frame assembly can also provide space for other similar components through the concave structure design.
[0102] It should be understood that in actual application scenarios, specific dimensional parameters such as the relative position, length, and recessed depth d8 of the area recessed toward the main body 14 can be determined according to actual needs, and this application does not limit these dimensional parameters.
[0103] In some related technologies, in order to reserve space for the required installation components, it is usually chosen to reduce the overall bending height of the bending portion in the middle frame, which leads to a decrease in the supporting capacity of the bending portion in the middle frame. The concave structure design in the first bending zone provided in the embodiment of the present application can provide installation space for the required installed components in the first direction z in the first bending zone of the middle frame, while the bending height of other parts is not affected by the component and decreases. Furthermore, the supporting capacity of the bending portion can be improved, the strength of the middle frame assembly is improved, and it performs well in the strength test, while taking into account the lightweight design requirements of the middle frame assembly and the realization of the functional structure.
[0104] An electronic device provided in an embodiment of the present application includes the middle frame assembly in any of the above embodiments. Optionally, the electronic device may also include a mainboard, an antenna and a coaxial line, wherein the coaxial line is accommodated in a wire groove of the middle frame assembly and is used to connect the mainboard and the antenna.
[0105] In the embodiment of the present application, the electronic device may further include a screen, a bottom plate and other components such as a battery, etc. The middle frame assembly of the electronic device is located between the screen and the bottom plate. In the middle frame assembly, the bent portion of the middle frame bulges toward the bottom plate, so that the middle frame forms a concave cavity to provide a housing space for the motherboard and the battery, and the screen, the middle frame assembly and the bottom plate can be connected to form a closed structure.
[0106] In actual applications, the materials of the screen and base plate of the electronic device can be selected according to needs. For example, the screen can be an organic light-emitting diode display or a liquid crystal display, etc., and can be a rigid screen or a flexible screen; the base plate material can be metal, plastic, ceramic, etc., and this application does not limit this.
[0107] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.
Claims
1. A middle frame assembly, characterized in that: include: A middle frame (1) comprises a main body (14) and a bending portion (15) located at an edge of the main body (14), wherein the bending portion (15) is bent along a first direction perpendicular to the main body (14); A plastic part (2), the plastic part (2) surrounding the outer periphery of the main body (14) and covering the bent part (15), a first wall (22) or a second wall (21) of the plastic part (2) being provided with a wire groove (201), the first wall (22) being a side wall of the plastic part (2) facing the main body (14) in a second direction, the second wall (21) being a side wall of the plastic part (2) away from the main body (14) in the first direction, a distance between a side of the wire groove (201) facing the bent part (15) and the bent part (15) in the second direction being greater than or equal to 0, and the second direction being perpendicular to the first direction.
2. The middle frame assembly according to claim 1, characterized in that: The wire groove (201) is arranged on the first wall (22) of the plastic part (2), the depth direction of the wire groove (201) is parallel to the second direction, and the distance between the side wall of the wire groove (201) facing the main body (14) in the first direction and the main body (14) is less than or equal to the height of the bent portion (15).
3. The middle frame assembly according to claim 2, characterized in that: In the first direction, the distance between the wire groove (201) and the main body (14) is greater than or equal to the distance between the wire groove (201) and the second wall (21) of the plastic part (2).
4. The middle frame assembly according to claim 2, characterized in that: In the first direction, the distance between the end surface of the wire groove (201) facing the second wall (21) of the plastic part (2) and the second wall (21) is greater than or equal to 0.5 mm.
5. The middle frame assembly according to claim 1, characterized in that: The wire groove (201) is arranged on the second wall (21) of the plastic part (2), the depth direction of the wire groove (201) is parallel to the first direction, and the distance between the side wall of the wire groove (201) facing the main body (14) in the first direction and the main body (14) is less than or equal to the height of the bent portion (15).
6. The middle frame assembly according to any one of claims 1 to 5, characterized in that: The bending portion (15) comprises two plates (151) connected by bending, the two plates (151) are arranged along the second direction and extend along a third direction, and the third direction is perpendicular to the first direction and the second direction; In the third direction, the bending portion (15) comprises a first bending area (101), a second bending area (103), and a first transition area (105) located between the first bending area (101) and the second bending area (103); In the first bending zone (101), the two plates (151) are in contact with each other, in the second bending zone (103), there is a constant first gap between the two plates (151), and in the first transition zone (105), there is a gradual second gap between the two plates.
7. The middle frame assembly according to claim 6, characterized in that: In the third direction, the first bending zone (101) includes a first sub-bending zone (107), a second sub-bending zone (106), and a second transition zone (104) located between the first sub-bending zone (107) and the second sub-bending zone (106); The first sub-bending zone (107) and the second sub-bending zone (106) are respectively located in different planes perpendicular to the second direction, and the second transition zone (104) is used to connect the first sub-bending zone (107) and the second sub-bending zone (106).
8. The middle frame assembly according to claim 7, characterized in that: The second sub-bending zone (106) is concave toward the main body (14) relative to the second bending zone (103) and the first sub-bending zone (107).
9. The middle frame assembly according to claim 6, characterized in that: In the first direction, the bent connection portion (152) between the two plates (151) in the first bending zone (101) is concave toward the main body (14).
10. The middle frame assembly according to any one of claims 6 to 9, characterized in that: A distance of the first gap in the second direction is greater than or equal to 1.0 mm.
11. The middle frame assembly according to any one of claims 1 to 5, characterized in that: The distance between the side of the wire groove (201) facing the bending portion (15) and the bending portion (15) in the second direction is at least 0.1 mm.
12. The middle frame assembly according to any one of claims 1 to 5, characterized in that: The height of the bent portion (15) in the first direction is greater than or equal to 2.9 mm.
13. The middle frame assembly according to any one of claims 1 to 5, characterized in that: The wire duct (201) extends along a third direction, and the third direction is perpendicular to the first direction and the second direction.
14. The middle frame assembly according to any one of claims 1 to 5, characterized in that: The shortest distance between the bent portion (15) and a third wall (23) of the plastic component (2) facing away from the main body (14) in the second direction is at least 0.05 mm.
15. The middle frame assembly according to claim 14, characterized in that: The shortest distance between the bent portion (15) and the third wall (23) is 0.3-0.5 mm.
16. An electronic device, characterized in that: include: A middle frame assembly as claimed in any one of claims 1 to 15.
17. The electronic device according to claim 16, characterized in that: The electronic device further includes: a mainboard, an antenna and a coaxial line. The coaxial line is accommodated in a wire slot of the middle frame assembly and is used to connect the mainboard and the antenna.