Mid-frame components and electronic devices

Abstract

This disclosure provides a mid-frame assembly and an electronic device, belonging to the field of electronic device technology. The mid-frame assembly includes a mid-plate, a first frame, and a second frame. The first and second frames form a closed structure and surround the mid-plate. The first frame has a first antenna for radiating signals in a first frequency band, and the second frame has a second antenna for radiating signals in a second frequency band. The first frequency band is greater than the second frequency band, thereby enabling the mid-frame assembly to radiate signals in different frequency bands. The first antenna has a first cavity, and / or the second antenna has a second cavity. Therefore, the total weight of the first and second antennas is relatively light, resulting in a lighter mid-frame assembly.

Description

Technical Field

[0001] This disclosure relates to the field of electronic device technology, and in particular to a mid-frame assembly and an electronic device. Background Technology

[0002] The mid-frame assembly is a core supporting component of electronic devices, located between the screen and the back cover. The mid-frame assembly includes a mid-plate and a frame, with the frame surrounding and connecting to the mid-plate. The frame integrates an antenna, enabling it to receive and radiate signals. Utility Model Content

[0003] This disclosure provides a mid-frame assembly and an electronic device that can reduce the weight of the mid-frame assembly. The technical solutions for the mid-frame assembly and the electronic device are as follows.

[0004] In a first aspect, this disclosure provides a mid-frame assembly, the mid-frame assembly including a mid-plate, a first frame, and a second frame;

[0005] The first frame and the second frame form a closed structure, and the first frame and the frame surround the middle plate. The first frame has a first antenna for radiating signals in a first frequency band, and the second frame has a second antenna for radiating signals in a second frequency band. The first frequency band is greater than the second frequency band.

[0006] The first antenna has a first cavity, and / or the second antenna has a second cavity.

[0007] In one possible implementation, the first antenna includes a plurality of first radiating branches;

[0008] There is a first break between two adjacent first radial branches, and each first radial branch has a first feed point and a first cavity, the first cavity being located on the side of the first feed point away from the first break.

[0009] In one possible implementation, at least one of the first radiating branches has at least four first feed points and one first cavity;

[0010] At least two of the first feed points are located on one side of the first cavity, and at least two other first feed points are located on the other side of the first cavity. The positions of the first feed points on the first radiating stub are solid structures. This reduces the weight of the first antenna while still allowing it to achieve better performance.

[0011] In one possible implementation, let L be the distance between the first feed point and the first cavity, then 1.5mm ≤ L ≤ 2mm. If L is too small, it may affect the performance of the first centerline. If L is too large, it will make the volume of the first cavity smaller, which is not conducive to the weight reduction of the first antenna.

[0012] In one possible implementation, the second antenna includes a plurality of second radiating branches;

[0013] A second slit is provided between two adjacent second radial branches. Each second radial branch has a second feed point and a second cavity, a portion of which is opposite to the second feed point. The entire second radial branch adopts a hollow structure design, thereby making the second antenna lighter in weight.

[0014] In one possible implementation, the first cavity has a first support member inside, which abuts against at least two opposing sidewalls of the first cavity. This results in a high structural rigidity for the first antenna, preventing it from easily deforming.

[0015] In one possible implementation, the first support member includes a first support rod, a second support rod, and a third support rod;

[0016] The first support rod is located between the second and third support rods. Both ends of the first support rod abut against the first and second side walls of the first cavity, respectively. Both ends of the second support rod abut against the first support rod and the third side wall of the first cavity, respectively. Both ends of the third support rod abut against the first support rod and the fourth side wall of the first cavity, respectively. The first and second side walls are opposite each other, and the third and fourth side walls are opposite each other. In this way, the first support member can support the four side walls of the first cavity, improving the support strength for the first antenna.

[0017] In one possible implementation, the first support member includes at least two second support rods and at least two third support rods.

[0018] In one possible implementation, the thickness of the sidewall of the first cavity is 0.4 mm to 0.8 mm;

[0019] The thickness of the sidewall of the second cavity is 0.4mm-0.8mm. If the thickness is too large, it will hinder the weight reduction of the first and second antennas. If the thickness is too small, it will result in lower structural strength for both the first and second antennas.

[0020] Secondly, this disclosure provides an electronic device including a mid-frame assembly as described in any of the first aspects. The technical solution provided by this disclosure has at least the following beneficial effects:

[0021] This disclosure provides a mid-frame assembly where, because the first antenna has a first cavity and / or the second antenna has a second cavity, the total weight of the first and second antennas is lighter, thereby making the mid-frame assembly lighter as well. Furthermore, the mid-frame assembly can radiate signals in different frequency bands, enabling electronic devices to support communication in different frequency bands.

[0022] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. In the drawings:

[0024] Figure 1 This is a schematic diagram of the structure of a mid-frame component shown in an embodiment of this disclosure;

[0025] Figure 2 This is an exploded view of a mid-frame assembly shown in an embodiment of this disclosure;

[0026] Figure 3 This is a schematic diagram of the structure of a first antenna and a second antenna shown in an embodiment of this disclosure;

[0027] Figure 4 This is a cross-sectional view of an antenna shown in an embodiment of this disclosure;

[0028] Figure 5 This is a cross-sectional view of a second antenna shown in an embodiment of this disclosure;

[0029] Figure 6 This is a partial cross-sectional view of a mid-frame assembly shown in an embodiment of this disclosure;

[0030] Figure 7 This is a partial structural schematic diagram of a mid-frame component shown in an embodiment of this disclosure;

[0031] Figure 8 This is a partial structural schematic diagram of a mid-frame component shown in an embodiment of this disclosure;

[0032] Figure 9 This is a partial cross-sectional view of a mid-frame assembly shown in an embodiment of this disclosure.

[0033] Legend:

[0034] 1. Middle plate;

[0035] 2. First frame; 2a. First antenna; 20. First cavity; 201. First support member; 2011. First support rod; 2012. Second support rod; 2013. Third support rod; 21. First radiating branch; 22. First gap; 23. First feed point.

[0036] 3. Second frame, 3a. Second antenna, 30. Second cavity, 31. Second radial branch, 32. Second fracture, 33. Second feed point;

[0037] 4. Plastic parts.

[0038] The accompanying drawings have illustrated specific embodiments of this disclosure, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this disclosure to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings.

[0040] The terminology used in the embodiments of this disclosure is for illustrative purposes only and is not intended to limit the disclosure. Unless otherwise defined, the technical or scientific terms used herein should be understood in their ordinary sense by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” “third,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “a” or “one,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising,” “including,” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The terms “connected,” “linked,” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” “right,” etc., are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0041] The mid-frame assembly is a core supporting component of electronic devices, located between the screen and the back cover. The mid-frame assembly includes a mid-plate and a frame, with the frame surrounding and connecting to the mid-plate. The frame integrates an antenna, enabling it to receive and radiate signals.

[0042] In related technologies, the antenna in the frame is a solid structure, which makes the frame heavy and is not conducive to weight reduction of the middle frame components.

[0043] In view of the above-mentioned technical issues, such as Figures 1-3 As shown, this embodiment of the disclosure provides a mid-frame assembly, which includes a mid-plate 1, a first frame 2, and a second frame 3. The first frame 2 and the second frame 3 form a closed structure and surround the mid-plate 1. The first frame 2 has a first antenna 2a for radiating signals in a first frequency band, and the second frame 3 has a second antenna 3a for radiating signals in a second frequency band, where the first frequency band is greater than the second frequency band. Figure 4 and Figure 5 As shown, the first antenna 2a has a first cavity 20, and / or the second antenna 3a has a second cavity 30.

[0044] The middle plate 1 is made of metal and serves to support components such as the screen, motherboard, small board, and battery in the electronic device. The motherboard integrates devices such as processors and sensors, while the small board integrates devices such as power management, charging interfaces, and speakers. The first frame 2 surrounds the motherboard, and the second frame 3 surrounds the small board.

[0045] In this embodiment of the disclosure, the first antenna 2a may have a first cavity 20, and the second antenna 3a may not have a second cavity 30. Alternatively, the first antenna 2a may not have a first cavity 20, and the second antenna 3a may have a second cavity 30. Alternatively, the first antenna 2a may have a first cavity 20, and the second antenna 3a may have a second cavity 30.

[0046] The middle frame assembly may also include a plastic part 4, with part of the plastic part 4 located between the middle plate 1 and the first frame 2, and another part of the plastic part 4 located between the middle plate 1 and the second frame 3, so that the plastic part 4 can support the middle plate 1, the first frame 2 and the second frame 3.

[0047] The technical solution provided in this disclosure, because the first antenna 2a has a first cavity 20 and / or the second antenna 3a has a second cavity 30, results in a lighter total weight for the first antenna 2a and the second antenna 3a, thereby reducing the weight of the mid-frame assembly. Furthermore, the mid-frame assembly can radiate signals in different frequency bands, enabling the electronic device to support communication in different frequency bands.

[0048] In some examples, such as Figure 4As shown, the first antenna 2a includes multiple first radiating stubs 21. A first gap 22 exists between adjacent first radiating stubs 21, and each first radiating stub 21 has a first feed point 23 and a first cavity 20. The multiple first radiating stubs 21 enable the first antenna 2a to radiate signals in multiple frequency bands, such as a first frequency band, a third frequency band, and a fourth frequency band. The third and fourth frequency bands are both higher than the second frequency band. The first radiating stubs 21 can receive or transmit signals through the first feed point 23.

[0049] Since the first, third, and fourth frequency bands are all higher than the second frequency band, the performance of the first antenna 2a is more susceptible to the influence of the antenna radiating stub structure compared to the second antenna 3a. Therefore, the structure at the first feed point 23 has a significant impact on the performance of the first antenna 2a. Thus, in this embodiment, the first cavity 20 is positioned on the side of the first feed point 23 away from the first slot 22. That is, the location of the first feed point 23 on the first radiating stub 21 is a solid structure. This reduces the weight of the first antenna 2a while still providing it with better performance.

[0050] In some examples, such as Figure 4 As shown, at least one first radiating branch 21 has at least four first feed points 23 and one first cavity 20. At least two first feed points 23 are located on one side of the first cavity 20, and at least two other first feed points 23 are located on the other side of the first cavity 20. The distance between the at least two first feed points 23 located on the same side of the first cavity 20 is relatively close, so no cavity is set between these two first feed points 23, that is, the space between these two first feed points 23 is a solid structure.

[0051] In other examples, if the multiple first feed points 23 in the first radiating branch 21 are far apart, the first radiating branch 21 may also have multiple first cavities 20. And the first cavities 20 are distributed between two first feed points 23 that are far apart.

[0052] In some examples, such as Figure 4 As shown, let L be the distance between the first feed point 23 and the first cavity 20, then 1.5mm ≤ L ≤ 2mm. If L is too small, it will easily affect the performance of the first antenna 2a. If L is too large, it will make the volume of the first cavity 20 smaller, which is not conducive to the weight reduction of the first antenna 2a.

[0053] In some examples, such as Figure 5 As shown, the second antenna 3a includes multiple second radiating stubs 31. A second slit 32 is provided between adjacent second radiating stubs 31, and each second radiating stub 31 has a second feed point 33 and a second cavity 30. The second radiating stubs 31 can receive or transmit signals through the second feed point 33.

[0054] Because the second frequency band is lower, the performance of the second antenna 3a is less affected by the structure at the second feed point 33. Therefore, in this embodiment, a portion of the second cavity 30 is positioned opposite the second feed point 33. That is, the entire second radiating branch 31 adopts a hollow structure design, thereby making the second antenna 3a lighter in weight.

[0055] In some examples, such as Figure 6 As shown, the first cavity 20 has a first support member 201 inside, and the first support member 201 abuts against at least two opposite side walls of the first cavity 20. This makes the first antenna 2a have high structural strength and avoids deformation of the first antenna 2a.

[0056] For example, if the length of the first radial branch 21 is relatively long, multiple first support members 201 arranged at intervals can be provided in the first cavity 20. If the length of the first radial branch 21 is relatively short, only one first support member 201 can be provided in the first cavity 20, or no first support member 201 can be provided. Specifically, the number of first support members 201 can be set according to actual needs.

[0057] In some examples, such as Figure 6 As shown, the first support member 201 includes a first support rod 2011, a second support rod 2012, and a third support rod 2013. The first support rod 2011 is located between the second support rod 2012 and the third support rod 2013. The two ends of the first support rod 2011 abut against the first sidewall and the second sidewall of the first cavity 20, respectively. The two ends of the second support rod 2012 abut against the first support rod 2011 and the third sidewall of the first cavity 20, respectively. The two ends of the third support rod 2013 abut against the first support rod 2011 and the fourth sidewall of the first cavity 20, respectively. The first and second sidewalls are opposite each other, and the third and fourth sidewalls are opposite each other. In this way, the first support member 201 can support the four sidewalls of the first cavity 20, improving the support strength for the first antenna 2a.

[0058] Where the lengths of the third and fourth sidewalls are greater than the lengths of the first and second sidewalls, the first support member 201 may also include at least two second support rods 2012 and at least two third support rods 2013, thereby giving the first support member 201 higher support strength for the third and fourth sidewalls. The structure of the first support member 201 in the first cavity 20 of each first radial branch 21 may be the same or different.

[0059] Correspondingly, each second cavity 30 may also have a second support member inside, and the second support member abuts against at least two opposite side walls of the second cavity 30. The structure of the second support member may be the same as that of the first support member 201, and the specific structure of the second support member will not be described in detail here.

[0060] In some examples, the sidewall thickness of the first cavity 20 is 0.4mm-0.8mm, and the sidewall thickness of the second cavity 30 is 0.4mm-0.8mm. If the thickness is too large, it will hinder the weight reduction of the first antenna 2a and the second antenna 3a. If the thickness is too small, it will result in lower structural strength of the first antenna 2a and the second antenna 3a.

[0061] In related technologies, the first antenna 2a and the second antenna 3a are typically manufactured using CNC (Computer Numerical Control) technology. To reduce processing costs, this embodiment employs 3D printing technology to manufacture the first antenna 2a and the second antenna 3a. Furthermore, the first support member 201 and the second support member also prevent material collapse during the 3D printing process.

[0062] Furthermore, compared to traditional CNC machining, 3D printing technology offers higher production efficiency, reducing the machining of mid-frame components and saving on CNC tooling and material costs. It also allows for the fabrication of more complex structures for the first antenna 2a and the second antenna 3a, providing greater design flexibility. Given the limited space in electronic devices, it enables the design and fabrication of complex structures, improving the performance of electronic devices.

[0063] In some examples, the first antenna 2a and the middle plate 1 can be fixedly connected by welding. Specifically, for example... Figure 7 As shown, it can be welded by overlapping. Or, as... Figure 8 As shown, it can also be welded by seam welding. Figure 7 and Figure 8 (The solder joint 100 in the image is the soldering position). Or, as shown... Figure 9 As shown, the connection can also be achieved by riveting.

[0064] Correspondingly, the second line 3a and the middle plate 1 can also be connected by lap welding, seam welding or riveting.

[0065] This disclosure also provides an electronic device, which includes the aforementioned mid-frame component.

[0066] Among them, electronic devices can be mobile phones or tablets, etc.

[0067] The electronic device provided in this embodiment is lightweight because the overall weight of the mid-frame assembly is relatively light.

[0068] The above description is merely an optional embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A mid-frame component, characterized in that, The middle frame assembly includes a middle plate (1), a first frame (2), and a second frame (3); The first frame (2) and the second frame (3) form a closed structure, and the first frame (2) and the second frame (3) surround the middle plate (1). The first frame (2) has a first antenna (2a) for radiating signals in a first frequency band, and the second frame (3) has a second antenna (3a) for radiating signals in a second frequency band. The first frequency band is greater than the second frequency band. The first antenna (2a) has a first cavity (20), and / or the second antenna (3a) has a second cavity (30).

2. The mid-frame assembly according to claim 1, characterized in that, The first antenna (2a) includes a plurality of first radiating branches (21); There is a first slit (22) between two adjacent first radial branches (21), each first radial branch (21) has a first feed point (23) and a first cavity (20), the first cavity (20) being located on the side of the first feed point (23) away from the first slit (22).

3. The mid-frame assembly according to claim 2, characterized in that, At least one of the first radiating branches (21) has at least four first feed points (23) and one first cavity (20); At least two of the first feed points (23) are located on one side of the first cavity (20), and at least two other first feed points (23) are located on the other side of the first cavity (20).

4. The mid-frame assembly according to claim 2, characterized in that, Let L be the distance between the first feed point (23) and the first cavity (20), then 1.5mm≤L≤2mm.

5. The mid-frame assembly according to claim 1, characterized in that, The second antenna (3a) includes multiple second radiating stubs (31); There is a second slit (32) between two adjacent second radial branches (31), each second radial branch (31) has a second feed point (33) and a second cavity (30), a portion of the second cavity (30) being opposite to the second feed point (33).

6. The mid-frame assembly according to any one of claims 1-5, characterized in that, The first cavity (20) has a first support member (201) inside, and the first support member (201) abuts against at least two opposite side walls of the first cavity (20).

7. The mid-frame assembly according to claim 6, characterized in that, The first support member (201) includes a first support rod (2011), a second support rod (2012), and a third support rod (2013); The first support rod (2011) is located between the second support rod (2012) and the third support rod (2013). The two ends of the first support rod (2011) abut against the first side wall and the second side wall of the first cavity (20), respectively. The two ends of the second support rod (2012) abut against the first support rod (2011) and the third side wall of the first cavity (20), respectively. The two ends of the third support rod (2013) abut against the first support rod (2011) and the fourth side wall of the first cavity (20), respectively. The first side wall and the second side wall are opposite to each other, and the third side wall and the fourth side wall are opposite to each other.

8. The mid-frame assembly according to claim 7, characterized in that, The first support member (201) includes at least two second support rods (2012) and at least two third support rods (2013).

9. The mid-frame assembly according to any one of claims 1-5, characterized in that, The thickness of the sidewall of the first cavity (20) is 0.4mm-0.8mm; The thickness of the sidewall of the second cavity (30) is 0.4mm-0.8mm.

10. An electronic device, characterized in that, The electronic device includes the mid-frame assembly as described in any one of claims 1-9.

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