Middle frame assembly and terminal equipment

Abstract

The utility model discloses a middle frame assembly and terminal equipment. The middle frame assembly comprises a middle frame, an antenna carrier, an upper frame elastic sheet and a grounding elastic sheet. The middle frame is concavely provided with a slot along the thickness direction, and the side wall of the slot is provided with an upper frame point; the antenna carrier is integrated with a device for realizing an antenna function, and the antenna carrier comprises an insertion plate. The front surface, corresponding to the outer side of the middle frame, of the insertion plate is electrically connected with the upper frame elastic sheet, and the back surface of the insertion plate is connected with the grounding elastic sheet; and the upper frame elastic sheet is also electrically connected with the upper frame point. And the grounding elastic sheet, the upper frame elastic sheet and the insertion plate are all erected in the slot and do not exceed the top end surface of the slot. Therefore, under the condition that the terminal equipment is light and thin, the problems of side connection of the antenna upper frame and grounding of the mobile terminal are solved by reasonably utilizing the space (particularly, the Z-direction space of the terminal equipment), so that the product stacking is more perfect.

Description

Technical Field

[0001] The present application relates to the technical field of a middle frame assembly in which an antenna is arranged in the middle frame, and in particular to a middle frame assembly and a terminal device. Background Art

[0002] At present, the thinness of terminal equipment is one of the product development directions. The terminal equipment includes a middle frame and antenna-related components, such as the upper frame point on the middle frame and the grounding signal transmission path. Therefore, under the condition that the terminal equipment is thin and light (that is, the Z-direction height of the terminal equipment is small), how to layout these components (also known as stacking in the industry) to meet the requirements of the antenna upper frame and grounding is a problem that needs to be solved. Utility Model Content

[0003] The purpose of the present application is to disclose a middle frame assembly and a terminal device. The middle frame assembly meets the requirements of upper frame and grounding in a limited space.

[0004] The present application discloses a middle frame assembly. The middle frame assembly includes a middle frame, an antenna carrier, an upper frame spring and a grounding spring. The middle frame assembly includes a middle frame, an antenna carrier, an upper frame spring and a grounding spring. The middle frame is recessed with a slot along the thickness direction, and the side wall of the slot is provided with an upper frame point; the antenna carrier is integrated with a device that realizes the antenna function, and the antenna carrier includes an insertion plate; the insertion plate is electrically connected to the upper frame spring on the front side corresponding to the outer side of the middle frame, and is connected to the grounding spring on the back side; the upper frame spring is also electrically connected to the upper frame point, and the grounding spring and the upper frame spring are located on the opposite sides of the insertion plate; the grounding spring, the upper frame spring and the insertion plate are all upright in the slot, and none of them exceeds the top surface of the slot.

[0005] In some embodiments, the antenna carrier is an MPI FPC, and the insert board integrates at least part of the device for realizing the antenna function.

[0006] In some embodiments, the upper frame point includes an upper frame piece, which is planar and parallel to the insertion plate and is in contact with the side wall of the slot.

[0007] In some embodiments, the upper frame spring piece includes a welding portion and an upper frame arm. The welding portion is parallel to the insert plate and welded to the insert plate. The upper frame arm is inclined relative to the upper frame piece and directly abuts against the upper frame piece.

[0008] In some embodiments, the middle frame assembly includes a reinforcing plate located between the grounding spring sheet and the inserting plate, and the reinforcing plate also covers a back side of the inserting plate.

[0009] In some embodiments, the grounding spring includes a hook, the middle frame includes a mounting slot, the mounting slot and the upper frame point are located on opposite sides of the slot; and the hook is hung in the mounting slot.

[0010] In some embodiments, the grounding spring also includes a mounting portion and a grounding arm, the mounting portion and the hook form an L shape and fit with the side wall of the slot; the grounding arm and the hook are located on opposite sides of the mounting portion and are connected to the mounting portion through an arched portion.

[0011] In some embodiments, along the length direction of the slot, both ends of the hook are limited by the side walls of the mounting slot.

[0012] In some embodiments, there are at least two upper frame points, which are spaced apart along the length direction of the slot. The upper frame spring pieces correspond one-to-one to the upper frame points, and are spaced apart along the length direction of the slot. The grounding spring piece includes a grounding arm, and the grounding arm is connected one-to-one to the upper frame points through the antenna carrier.

[0013] In a second aspect, the present application discloses a terminal device, wherein the terminal device comprises any one of the aforementioned middle frame components.

[0014] For the middle frame assembly and the terminal device, since the upper frame shrapnel, the insert plate and the grounding shrapnel are all located in the slot, the antenna carrier is connected to the upper frame point through the upper frame shrapnel to realize the side connection of the antenna upper frame, and then the upper frame point grounding is realized by connecting the antenna carrier to the upper frame shrapnel in combination with the grounding shrapnel, and the grounding shrapnel, the upper frame shrapnel and the insert plate do not exceed the top surface of the slot, thereby, the reasonable use of space (especially the space in the Z direction of the terminal device) solves the problem of the side connection of the antenna upper frame and grounding under the premise of thinness and lightness of the mobile terminal. For example, in some related, the antenna carrier is located in the horizontal direction, and the upper frame shrapnel is located in the horizontal direction and below the antenna carrier. At this time, the bracket is required to press the antenna carrier to fix the antenna carrier. In this way, the total height required by the bracket, the antenna carrier and the upper frame shrapnel will be large, and the terminal device is thin and light and has a limited Z-direction height, so that the depth of the groove on the middle frame for installing the aforementioned antenna carrier is less than the total height required by the bracket, the antenna carrier and the upper frame shrapnel. Therefore, the aforementioned design cannot meet the requirements of the thin terminal device for the upper frame and grounding. In this application, the bracket can be omitted because the insertion plate is inserted vertically, the upper frame spring sheet and the grounding spring sheet are all upright in the slot. In addition, the upper frame spring sheet, the insertion plate and the grounding spring sheet do not exceed the top surface of the slot, and the upper frame spring sheet and the grounding spring sheet are also located on the opposite sides of the insertion plate. Thus, the requirements for the upper frame and grounding are met when the terminal device is thin and light. For example, by making the upper frame spring sheet upright, the upper frame point is higher in the Z direction, which meets the antenna's requirements for the height of the upper frame point. In addition, the upper frame spring sheet, the insertion plate and the grounding spring sheet are all upright, and the upper frame spring sheet and the grounding spring sheet are located on the opposite sides of the insertion plate, which takes up little space and also meets the requirements of the thin and light terminal device for the upper frame and grounding. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is an exploded view of a middle frame assembly according to an embodiment of the present application;

[0016] Figure 2 is a perspective view of a middle frame assembly according to an embodiment of the present application;

[0017] Figure 3 yes Figure 2 A magnified view of part A;

[0018] Figure 4 yes Figure 2 A front view of the middle frame assembly shown;

[0019] Figure 5 is along Figure 4 A cross-sectional view of the AA line;

[0020] Figure 6 is a three-dimensional diagram of an upper frame spring piece according to an embodiment of the present application;

[0021] Figure 7 is a three-dimensional diagram of a grounding spring according to an embodiment of the present application. DETAILED DESCRIPTION

[0022] Here, the technical solutions in the embodiments (or "implementations") of the present application will be described clearly and completely in conjunction with the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0023] If there are terms involving directional indications or positional relationships in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first", "second", etc. involved in the embodiments of the present application are only used for the purpose of convenience of description and cannot be understood as indicating or implying relative importance.

[0024] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The present application discloses a middle frame assembly. The middle frame assembly includes a middle frame 1, an antenna carrier 2, an upper frame spring 3 and a ground spring 4. The middle frame 1 is recessed with a slot 11 along the thickness direction. The recess direction is as follows: Figure 1 As shown by the arrow R in the middle. The side wall of the slot 11 is provided with an upper frame point 12. Figure 3 and Figure 4 The antenna carrier 2 is integrated with a device 22 for realizing antenna functions (for example, an antenna tuning device), including an insertion board 21 . Figure 3 and Figure 4 Only one device for realizing the antenna function is marked, but the technicians can understand that the device for realizing the antenna function is not limited to one. The upper frame spring piece 3 is electrically connected to the front side of the insertion plate 21 corresponding to the outer side of the middle frame 1. The insertion plate 21 and the upper frame spring piece 3 are inserted into the slot 11 along the depth direction of the slot 11 as a whole, and the upper frame spring piece 3 is also electrically connected to the upper frame point 12, thereby realizing the side-connected antenna upper frame. The back side of the insertion plate 21 is connected to the grounding spring piece 4. Therefore, the grounding spring piece 4 and the upper frame spring piece 3 are both upright in the slot 11 and are located on the opposite sides of the antenna carrier 2, see Figure 4 and Figure 5 Combined with Figure 1 , Figure 2 and Figure 3, the upper frame spring piece 3 is located on the left side of the antenna carrier 2, and the ground spring piece 4 is located on the right side of the antenna carrier 2. The ground spring piece 4 is electrically connected to the upper frame spring piece 3 through the antenna carrier 2 to form a signal transmission path as described later, so as to realize the grounding of the upper frame point 12, and then realize the loop between the upper frame point and the ground. The signal transmission path is specifically described as follows:

[0025] As Figure 4 With reference to the direction of the drawing, the signal transmission path is described as follows: 1) the upper frame point 12 at the upper end - the upper frame spring 3 at the top - the antenna carrier 2 (of course, including some components on the antenna carrier that implement the antenna function, such as antenna tuning devices) - the ground spring 4; 2) the lower upper frame point 12 - the lower upper frame spring 3 - the antenna carrier 2 - the ground spring 4, thereby realizing the transmission and reception of the two frequency band antennas. Of course, in the case where the middle frame assembly includes an enhancement board, the signal will also pass through the enhancement board. Technicians can understand that although two frequency bands are shown in the figure, the number of frequency bands is not limited, and can be one, three, and so on.

[0026] See also Figure 5 , the upper frame spring piece 3, the insert plate 21 and the ground spring piece 4 do not exceed the top surface of the slot 11. In this embodiment, the insert plate 21 is the highest, so Figure 5 It is only shown that the height difference of the insertion plate 21 below the top surface of the slot 11 is h.

[0027] As set up above, since the upper frame spring piece 3, the insertion plate 21 and the grounding spring piece 4 are all located in the slot 11, the antenna carrier 2 is connected to the upper frame point 12 through the upper frame spring piece 3 to realize the side connection of the antenna upper frame, and then combined with the grounding spring piece 4, the antenna carrier 2 is connected to the upper frame spring piece 3 to realize the grounding of the upper frame point 12, and the grounding spring piece 4, the upper frame spring piece 3 and the insertion plate 21 do not exceed the top surface of the slot 11. Therefore, the space (especially the space in the Z direction of the terminal device) is reasonably utilized, which solves the problem of side connection of the antenna upper frame and grounding under the premise of lightness and thinness of the mobile terminal. For example, in some related applications, the antenna carrier is located in the horizontal direction, and the upper frame spring is located in the horizontal direction and below the antenna carrier. At this time, a bracket is required to press the antenna carrier to fix the antenna carrier. In this way, the total height required for the bracket, antenna carrier and upper frame spring will be relatively large, and the terminal device is thin and light and has a limited Z-direction height, so that the depth of the groove on the middle frame for installing the aforementioned antenna carrier is less than the total height required for the bracket, antenna carrier and upper frame spring. Therefore, the aforementioned design cannot meet the requirements of the thin and light terminal device for the upper frame and grounding. However, in this application, because the insertion plate is vertically inserted, the upper frame spring and the grounding spring are both upright in the slot, the bracket can be omitted. In addition, the upper frame spring, the insertion plate and the grounding spring do not exceed the top surface of the slot, and the upper frame spring and the grounding spring are also located on the opposite sides of the insertion plate. Thus, the requirements for the upper frame and grounding in the case of thin and light terminal equipment are met. For example, by the upper frame spring being upright, the upper frame point is higher in the Z direction, which meets the antenna's requirements for the height of the upper frame point. In addition, the upper frame spring sheet, the insertion plate and the grounding spring sheet are all upright and the upper frame spring sheet and the grounding spring sheet are located on opposite sides of the insertion plate, occupying a small space and meeting the requirements of thin and light terminal equipment for the upper frame and grounding.

[0028] Of course, based on the roles played by the aforementioned inserting plate 21 , the upper frame spring piece 3 and the grounding spring piece 4 , the inserting plate 21 , the upper frame spring piece 3 and the grounding spring piece 4 are not limited to the structures described below.

[0029] In some embodiments, the antenna carrier 2 is an MPI FPC, see Figure 3 and Figure 4 The insert board integrates at least some of the devices for realizing the antenna function. The technicians can understand that some antenna tuning devices can be integrated on the insert board 21.

[0030] As described above, the antenna carrier 2 is an MPI FPC, and the insert board 21 integrates at least part of the devices for realizing the antenna function, so that the space utilization rate can be further improved, making the stacking more extreme. For example, after adopting the MPI FPC, there is no need for switching and / or single-pulling coaxial lines, and the space occupied is small, making the stacking more extreme and better meeting the above-mentioned upper frame and grounding requirements.

[0031] See also Figure 5 , Figure 3 and Figure 1 Combined with Figure 2 and Figure 4 The upper frame point 12 includes an upper frame piece 121 . The upper frame piece 121 is planar and parallel to the insertion plate 21 and is also in contact with the side wall of the slot 11 .

[0032] In some related technologies, the upper frame piece 121 is L-shaped, including a first arm welded to the middle frame 1 and a second arm connected to the first arm. The second arm abuts against the upper frame spring. As set above, the upper frame piece 121 is planar and parallel to the insertion plate 21, and is also fitted with the side wall of the slot 11. The upper frame spring 3 abuts against the upper frame piece 121. Compared with the aforementioned related technologies, the upper frame piece 121 does not have at least a second arm. Thus, in the case of realizing the side antenna function, the surface-to-surface fitting further improves the space utilization, making the stacking more extreme and improving the competitiveness of the product. In addition, in the above-mentioned related technologies in which the upper frame piece is L-shaped, the upper frame spring and the insertion plate are both located in the horizontal direction (perpendicular to the depth direction of the slot), which will cause the upper frame point to be lower in the Z direction, which cannot well meet the height requirement of the contact position between the upper frame spring and the upper frame point in the Z direction when the terminal device is thin and light. Because the insertion plate and the upper frame spring sheet are parallel to the depth direction of the slot, the contact position between the upper frame spring sheet and the upper frame point can be higher in the Z direction, thereby meeting the requirements for the contact position between the upper frame spring sheet and the upper frame point of the antenna in the Z direction when the terminal device is thin and light.

[0033] See also Figure 6 , Figure 5 and Figure 1 Combined with Figure 2 , Figure 3 and Figure 4 The upper frame spring piece 3 includes a welding portion 31 and an upper frame arm 32. Here, the "upper frame" in the upper frame arm 32 is only used to distinguish it from the subsequent grounding arm 43. Their main function is to play a connecting role. The welding portion 31 is parallel to the insertion plate 21 and is welded to the insertion plate 21. After welding, the upper frame spring piece 3 stands upright in the slot 11 as a whole (with Figure 5 The drawing direction of is used as a reference, and upright is the vertical direction, that is, the depth direction of the slot 11). The upper frame arm 32 is inclined relative to the upper frame piece 121 and directly abuts against the upper frame piece 121.

[0034] As described above, since the upper frame spring piece 3 includes the welding part 31 and the upper frame arm 32, the welding part 31 is parallel to the insertion plate 21 and welded to the insertion plate 21, and the upper frame arm 32 is inclined relative to the upper frame piece 121 and directly connected to the upper frame piece 121, so that, while ensuring that the upper frame spring piece 3 and the insertion plate 21 occupy a small space, the contact position of the upper frame spring piece and the upper frame point is higher in the Z direction, and it can also better meet the requirements of the antenna for the contact position of the upper frame spring piece and the upper frame point in the Z direction when the terminal device is thin and light. Of course, the upper frame arm 32 is inclined toward the upper frame piece 121 and inclined in the depth direction of the slot 11. In this case, it can be reliably connected by abutting against the upper frame piece 121. For example, in some related technologies, the antenna carrier (at least the insertion plate) is placed horizontally (perpendicular to the depth direction of the slot). The upper frame spring piece is L-shaped, including a first arm perpendicular to the insertion plate and a second arm parallel to the insertion plate. The first arm is connected to the insertion plate through a welding foot, and the second arm is connected to the upper frame point. Compared with the above-mentioned related technologies, the present application occupies less space, allowing products to be stacked more efficiently. Moreover, because the upper frame arm 32 is inclined to the upper frame piece 121, it can provide pressure, and based on this pressure, the upper frame arm 32 and the upper frame piece 121 are in tighter contact, and the contact is more reliable.

[0035] See also Figure 1 Combined with Figure 2 , Figure 3 , Figure 4 and Figure 5 , the middle frame assembly includes a reinforcing plate 5 located between the grounding spring piece 4 and the insert plate 21. The reinforcing plate 5 also covers the back side of the insert plate 21. The reinforcing plate 5 is not limited, for example, the reinforcing plate 5 is a PCB hard board. In the case of setting the reinforcing plate 5, a hollow area can be set on the reinforcing plate 5, so that the grounding spring piece 4 can be electrically connected to the corresponding part on the insert plate 21 through the hollow area, and then, realize electrical connection with the upper frame spring piece 3. For example, when the reinforcing plate 5 is a PCB hard board, the PCB hard board is welded to the insert plate and copper is leaked to the PCB hard board. The grounding spring piece is connected to the insert plate through the copper leakage area, and then can be electrically connected to the upper frame spring piece 3.

[0036] As described above, by adding the reinforcing plate 5 and covering the back side of the insert plate 21 , the insert plate 21 is reinforced to prevent the insert plate 21 from being deformed.

[0037] See also Figure 7 and Figure 3 Combined with Figure 5 and Figure 2 , the grounding spring 4 includes a hook 41. Figure 1 , Figure 3 and Figure 5The middle frame 1 includes a mounting groove 13. The mounting groove 13 and the upper frame point 12 are located on opposite sides of the slot 11. Figure 1 , Figure 2 , Figure 3 and Figure 5 , the mounting groove 13 is located on the right side of the slot 11, and the upper frame point 12 is located on the left side of the slot 11. Figure 3 and Figure 5 , the hook 41 is hung in the mounting groove 13 .

[0038] As set up above, the hook is hung in the installation slot 13, which is convenient for the grounding spring piece 4 to be assembled in the middle frame 1. At the same time, the hook is connected to the installation slot 13 to realize the positioning of the grounding spring piece 4 in the depth direction of the slot 11 (which can be understood as the Z direction), ensuring that the grounding spring piece 4 is finally accurately connected with the corresponding contact point on the insertion plate 21.

[0039] See also Figure 7 Combined with Figure 5 The grounding spring 4 further includes a mounting portion 42 and a grounding arm 43. The mounting portion 42 and the hook 41 form an L shape and fit with the side wall of the slot 11, for example, by welding. The grounding arm 43 and the hook 41 are located on opposite sides of the mounting portion 42 and are connected to the mounting portion 42 through an arched portion 431.

[0040] As set up above, the mounting portion 42 is fitted with the side wall of the slot 11, and the grounding arm 43 and the hook 41 are located on opposite sides of the mounting portion 42. The grounding spring 4 of this structure is simple in structure and occupies a small space, thereby ensuring that the utilization rate of the space is improved to make the stacking more extreme, especially when the terminal equipment is light and thin, the stacking is more extreme.

[0041] See also Figure 3 Combined with Figure 2 Along the length direction of the slot 11 , both ends of the hook 41 are limited by the side walls of the mounting slot 13 .

[0042] As set up above, by limiting the two ends of the hook 41 (which can be understood as the length direction), and then combining the bottom wall of the installation groove 13 to limit the hook 41 in the depth direction of the slot 11, ultimately, it is ensured that the grounding spring piece 4 is easy to install and accurately connected to the corresponding connection point on the insertion plate 21.

[0043] See also Figure 1 , Figure 2 , Figure 3 and Figure 4There are two upper frame points 12 (technicians can understand that there can be more than two), and at least two of the upper frame points 12 are spaced apart along the length direction of the slot 11, that is, when there are two upper frame points 12, the two upper frame points 12 are spaced apart along the length direction of the slot 11 as shown in the figure; when there are at least two upper frame points 12, at least two upper frame points 12 are spaced apart along the length direction of the slot 11, and other upper frame points 12 may be spaced apart along the length direction of the slot 11, or may not be spaced apart along the length direction of the slot 11.

[0044] The upper frame spring piece 3 corresponds to the upper frame point 12 one by one, and is arranged at intervals along the length direction of the slot 11. The grounding spring piece 4 includes a grounding arm 43, and the grounding arm 43 is connected to the upper frame point 12 through the antenna carrier 2 in a one-to-one correspondence. The one-to-one connection here means that a grounding arm 43 is finally connected to an upper frame point 12, corresponding to a frequency band. As mentioned above, the frame assembly in the present application includes two upper frame points 12, two upper frame spring pieces 3 and two grounding arms 43 of the grounding spring piece 4, which can realize the transmission and reception of two frequency bands. When the transmission and reception of three frequency bands are realized, the grounding spring piece 4 can have three grounding arms 43. Of course, in the case of realizing three frequency bands or more frequency bands, other grounding points can also be realized by setting other grounding spring pieces.

[0045] As set above, by setting a plurality of the upper frame points, upper frame springs, grounding springs and their positional relationship in the slot, the upper frame and grounding requirements of antennas of multiple frequency bands can be met when the terminal device is thin and light.

[0046] Although the above implementations are described by taking the terminal device being lightweight as an example, technicians can understand that the above solutions can also be used when the terminal device is not lightweight.

[0047] In a second aspect, the present application discloses a terminal device. The terminal device includes any of the aforementioned middle frame components. The terminal device is, for example, a mobile phone, a tablet computer, or a learning machine, etc.

[0048] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without causing conflicts. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the drawings; all modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. A middle frame assembly, characterized in that: The middle frame assembly includes a middle frame, an antenna carrier, an upper frame spring and a ground spring, wherein: The middle frame is recessed with a slot along the thickness direction, and the side wall of the slot is provided with an upper frame point; The antenna carrier is integrated with a device for realizing the antenna function, and the antenna carrier includes an insertion board; the front side of the insertion board corresponding to the outer side of the middle frame is electrically connected to the upper frame spring piece, and the back side of the insertion board is connected to the ground spring piece; the upper frame spring piece is also electrically connected to the upper frame point; The grounding spring sheet, the upper frame spring sheet and the inserting plate are all upright in the slot and do not exceed the top surface of the slot.

2. The middle frame assembly according to claim 1, characterized in that: The antenna carrier is an MPI FPC, and the insertion board integrates at least part of the devices that realize the antenna function.

3. The middle frame assembly according to claim 1, characterized in that: The upper frame point includes an upper frame piece, which is planar and parallel to the inserting plate and is also in contact with the side wall of the slot.

4. The middle frame assembly according to claim 3, characterized in that: The upper frame spring piece includes a welding portion and an upper frame arm, wherein the welding portion is parallel to the insert plate and welded to the insert plate; the upper frame arm is inclined relative to the upper frame piece and directly abuts against the upper frame piece.

5. The middle frame assembly according to claim 1, characterized in that: The middle frame assembly includes a reinforcing plate located between the grounding spring sheet and the inserting plate, and the reinforcing plate also covers the back side of the inserting plate.

6. The middle frame assembly according to claim 1, characterized in that: The grounding spring sheet includes a hook, the middle frame includes a mounting slot, the mounting slot and the upper frame point are located on opposite sides of the slot; the hook is hung in the mounting slot.

7. The middle frame assembly according to claim 6, characterized in that: The grounding spring also includes a mounting portion and a grounding arm. The mounting portion and the hook form an L shape and fit with the side wall of the slot. The grounding arm and the hook are located on opposite sides of the mounting portion and are connected to the mounting portion through an arched portion.

8. The middle frame assembly according to claim 7, characterized in that: Along the length direction of the slot, two ends of the hook are limited by the side walls of the mounting slot.

9. The middle frame assembly according to any one of claims 1 to 8, characterized in that: There are at least two upper frame points, which are spaced apart along the length direction of the slot; The upper frame spring pieces correspond to the upper frame points one by one and are arranged at intervals along the length direction of the slot; The grounding spring sheet includes a grounding arm, and the grounding arm is connected to the upper frame point in a one-to-one correspondence through the antenna carrier.

10. A terminal device, characterized in that: The terminal device comprises the middle frame assembly according to any one of claims 1 to 9.

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