Wearable device

Abstract

The utility model provides a wearable device, and relates to the technical field of wearable devices. The wearable device comprises a middle frame assembly, a mainboard and a first antenna assembly. The middle frame assembly comprises a plastic support and a metal skin, the metal skin covers the outer side face of the plastic support, and a containing cavity is formed in the plastic support; the main board is located in the containing cavity, and a stacking gap is formed between the outer peripheral side of the main board and the inner peripheral side of the containing cavity. The first antenna assembly comprises a first radiation branch knot and at least one first coupling branch knot; the first radiation branch knot and the at least one first coupling branch knot are arranged in the stacking gap at intervals. According to the wearable device provided by the utility model, the radiation efficiency of the first radiation branch knot is remarkably improved by utilizing the first coupling branch knot, and the stacking space of structures such as the mainboard and the plastic bracket cannot be occupied by adding the first coupling branch knot.

Description

Technical Field

[0001] The utility model relates to the field of electronic technology, and in particular to a wearable device. Background Art

[0002] With the development of electronic technology, wearable devices such as smart bracelets and watches are becoming increasingly popular.

[0003] In related technologies, these wearable devices typically use one or more sections of a metal mid-frame as antenna radiators to transmit and receive wireless signals, known as metal mid-frame antennas. However, as wearable devices become smaller and more versatile, their internal stacking becomes increasingly compact and complex, further squeezing antenna space, deteriorating the antenna environment, reducing clearance, and ultimately reducing antenna radiation performance. Utility Model Content

[0004] The utility model provides a wearable device, which can solve the problem of antenna environment deterioration and reduction of clearance area in the wearable device, thereby reducing antenna radiation performance.

[0005] The technical solution is as follows:

[0006] A wearable device, comprising: a middle frame assembly, a mainboard, and a first antenna assembly;

[0007] The middle frame assembly includes a plastic bracket and a metal skin, wherein the metal skin covers the outer side of the plastic bracket, and an accommodating cavity is provided inside the plastic bracket;

[0008] The main board is located in the accommodating cavity, and a stacking gap is formed between the outer circumference of the main board and the inner circumference of the accommodating cavity;

[0009] The first antenna assembly includes a first radiating branch and at least one first coupling branch;

[0010] The first radiation branch and the at least one first coupling branch are arranged in the stacking gap at intervals.

[0011] In some embodiments, the plastic bracket is a rectangular frame structure, and the accommodating cavity is a rectangular cavity;

[0012] The main board is rectangular;

[0013] The first radiation branch is located in the stacking gap corresponding to the first right angle of the main board, and the at least one first coupling branch is located in the stacking gap corresponding to the second right angle and / or the third right angle of the main board, and the second right angle and the third right angle are respectively located on both sides of the first right angle and are respectively adjacent to the first right angle.

[0014] In some embodiments, the first radiating branch includes a first branch segment and a second branch segment, the first branch segment and the second branch segment are respectively parallel to the two right-angled sides of the first right angle, and intersect perpendicularly on the diagonal line where the first right angle is located.

[0015] In some embodiments, a first feeding point is provided at the intersection of the first branch segment and the second branch segment.

[0016] In some embodiments, the first coupling branch includes a third branch segment and a fourth branch segment, and the third branch segment and the fourth branch segment are respectively parallel to the two right-angled sides of the corresponding second right angle or the third right angle, and intersect perpendicularly on the diagonal line where the second right angle or the third right angle is located.

[0017] In some embodiments, a first return point is provided at the intersection of the third branch segment and the fourth branch segment.

[0018] In some embodiments, the first antenna assembly is used to transmit and receive wireless signals in a frequency band corresponding to GNSS.

[0019] In some embodiments, the wearable device further includes a second antenna assembly, wherein the second antenna assembly includes a second radiating branch;

[0020] The second radiation branch is located in the stacking gap corresponding to a fourth right angle of the main board, and the fourth right angle and the first right angle are respectively located at two ends of a diagonal line of the main board.

[0021] In some embodiments, the second antenna assembly is used to transmit and receive wireless signals in a frequency band corresponding to Bluetooth.

[0022] In some embodiments, the second radiating branch includes a fifth branch segment and a sixth branch segment, and the fifth branch segment and the sixth branch segment are respectively parallel to two right-angled sides of the fourth right angle and intersect perpendicularly on the diagonal line where the fourth right angle is located.

[0023] In some embodiments, the wearable device is a smart bracelet or a smart watch, and the mainboard has a first edge corresponding to the 3 o'clock direction, a second edge corresponding to the 6 o'clock direction, a third edge corresponding to the 9 o'clock direction, and a fourth edge corresponding to the 12 o'clock direction;

[0024] The first right angle is formed by the perpendicular intersection of the first edge and the fourth edge, the second right angle is formed by the perpendicular intersection of the first edge and the second edge, the third right angle is formed by the perpendicular intersection of the third edge and the fourth edge, and the fourth right angle is formed by the perpendicular intersection of the second edge and the third edge.

[0025] The beneficial effects of the technical solution provided by the utility model include at least:

[0026] In the wearable device of this embodiment, the first antenna component is composed of a first radiating branch and at least one first coupling branch. After the first coupling branch is added, it will produce a coupling effect with the first radiating branch, which is equivalent to the first radiating branch feeding the first coupling branch through coupling. The first coupling branch will generate an induced current in a specific direction, and then generate secondary radiation. The secondary radiation is superimposed on the primary radiation of the first radiating branch, so that the electromagnetic wave of the first antenna component is strengthened, thereby significantly improving the radiation efficiency of the first antenna component.

[0027] In addition, the stacking gap between the outer peripheral surface of the mainboard and the inner peripheral side of the accommodating cavity of the plastic bracket is fully utilized, and the first radiation branch and the first coupling branch are arranged at intervals in the stacking gap, which will not occupy the stacking space of structures such as the mainboard and the plastic bracket, and has higher operability. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 This is a schematic structural diagram of a wearable device provided by an embodiment of the present utility model;

[0030] Figure 2 is a structural diagram of a wearable device provided by another embodiment of the present invention;

[0031] Figure 3 is a structural diagram of a wearable device provided by another embodiment of the present invention;

[0032] Figure 4 This is an exploded view of the structure of a wearable device provided by another embodiment of the present invention;

[0033] Figure 5 This is a test chart of the radiation efficiency of the wearable device provided by the embodiment of the present utility model in the corresponding GNSS frequency band;

[0034] Figure 6 This is a test chart of the radiation efficiency of the wearable device provided by the embodiment of the present utility model in the corresponding Bluetooth frequency band.

[0035] The reference numerals in the figures represent respectively:

[0036] 1. Middle frame assembly;

[0037] 11. Plastic bracket; 111. Accommodation cavity; 12. Metal skin;

[0038] 2. Motherboard;

[0039] 201, first right angle; 202, second right angle; 203, third right angle; 204, fourth right angle; 205, first edge; 206, second edge; 207, third edge; 208, fourth edge;

[0040] 3. a first antenna assembly;

[0041] 31, first radiating branch; 311, first branch segment; 312, second branch segment; 313, first feeding point; 32, first coupling branch; 321, third branch segment; 322, fourth branch segment; 323, first return point;

[0042] 4. Stacking gaps;

[0043] 5. Second antenna assembly;

[0044] 51, second radiating branch; 511, fifth branch segment; 512, sixth branch segment; 513, second feeding point;

[0045] 6. Watch strap;

[0046] 7. Screen module;

[0047] 71. Screen circuit board; 72. Screen cable;

[0048] 8. Battery;

[0049] 9. Back cover. DETAILED DESCRIPTION

[0050] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with certain aspects of the present invention, as detailed in the appended claims.

[0051] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0052] It should be understood that in the present invention, "electrical connection" can be understood as the physical contact and electrical conduction of components; it can also be understood as the form in which different components in the circuit structure are connected through physical lines such as printed circuit board (PCB) copper foil or wires that can transmit electrical signals. "Communication connection" can refer to the transmission of electrical signals, including wireless communication connection and wired communication connection. Wireless communication connection does not require a physical medium and does not belong to a connection relationship that limits the product structure. "Connection" and "connected" can both refer to a mechanical connection relationship or a physical connection relationship, that is, A and B are connected or A and B are connected, which means that there is a fastening component (such as screws, bolts, rivets, etc.) between A and B, or A and B are in contact with each other and A and B are difficult to separate.

[0053] Unless otherwise defined, all technical terms used in the embodiments of the present invention have the same meanings as commonly understood by those skilled in the art.

[0054] In order to make the purpose, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0055] Combine Figure 1 and Figure 2 As shown, this embodiment provides a wearable device, which includes: a middle frame component 1, a mainboard 2 and a first antenna component 3.

[0056] The middle frame assembly 1 includes a plastic bracket 11 and a metal skin 12 . The metal skin 12 covers the outer side of the plastic bracket 11 . An accommodating cavity 111 is provided inside the plastic bracket 11 .

[0057] The mainboard 2 is located within the accommodating cavity 111, and a stacking gap 4 is defined between the outer periphery of the mainboard 2 and the inner periphery of the accommodating cavity 111. The first antenna assembly 3 includes a first radiating branch 31 and at least one first coupling branch 32. The first radiating branch 31 and the at least one first coupling branch 32 are spaced apart within the stacking gap 4.

[0058] In the wearable device of this embodiment, the first antenna component 3 is composed of a first radiating branch 31 and at least one first coupling branch 32. After the first coupling branch 32 is added, it will produce a coupling effect with the first radiating branch 31, which is equivalent to the first radiating branch 31 feeding the first coupling branch 32 through coupling. The first coupling branch 32 will generate an induced current in a specific direction, and then generate secondary radiation. The secondary radiation is superimposed on the primary radiation of the first radiating branch 31, so that the electromagnetic wave of the first antenna component 3 is strengthened, thereby significantly improving the radiation efficiency of the first antenna component 3.

[0059] In addition, the stacking gap 4 between the outer peripheral surface of the mainboard 2 and the inner peripheral side of the accommodating cavity 111 of the plastic bracket 11 is fully utilized, and the first radiation branch 31 and the first coupling branch 32 are arranged at intervals in the stacking gap 4, which will not occupy the stacking space of structures such as the mainboard 2 and the plastic bracket 11, and has higher operability.

[0060] In some possible implementations, the number of the first coupling branches 32 is, for example, one, two, or three. When the number of the first coupling branches 32 is two or more, all the first coupling branches 32 are spaced apart from the first radiation branch 31 at the same time, and all the first coupling branches 32 are spaced apart from each other.

[0061] In other possible implementations, the metal cover 12 serves as the frame of the wearable device, improving its appearance, enhancing its structural strength, and protecting its internal components. Furthermore, the metal cover 12 can serve as another coupling branch of the first antenna assembly 3, generating a corresponding resonant frequency band together with the first coupling branch 32, further improving the radiation efficiency of the first antenna assembly 3.

[0062] Combine Figure 1 and Figure 2 As shown, in some embodiments, the plastic bracket 11 is a rectangular frame structure, the accommodating cavity 111 is a rectangular cavity; and the mainboard 2 is rectangular.

[0063] The first radiation branch 31 is located in the stacking gap 4 corresponding to the first right angle 201 of the main board 2, and at least one first coupling branch 32 is located in the stacking gap 4 corresponding to the second right angle 202 and / or the third right angle 203 of the main board 2, and the second right angle 202 and the third right angle 203 are respectively located on both sides of the first right angle 201 and are respectively adjacent to the first right angle 201.

[0064] Through the above arrangement, there is a square ring-shaped stacking gap 4 between the main board 2 and the accommodating cavity 111, and the first radiating branch node 31 and the first coupling branch node 32 are respectively arranged at two adjacent right angles, so that the space of the stacking gap 4 can be fully utilized, and the first radiating branch node 31 or the first coupling branch node 32 is arranged at a right angle position of the stacking gap 4, and the positioning and assembly of the first radiating branch node 31 and the first coupling branch node 32 are convenient, and a reasonable distance can be maintained between the first radiating branch node 31 and the first coupling branch node 32. The first coupling branch node 32 deliberately improves the radiation efficiency of the first radiating branch node 31.

[0065] In some possible implementations, there are two first coupling branches 32 , and the two first coupling branches 32 are respectively arranged in the stacking gaps 4 corresponding to the second right angle 202 and the third right angle 203 .

[0066] Combine Figure 1 and Figure 2 As shown, in some embodiments, the first radiating branch 31 includes a first branch segment 311 and a second branch segment 312. The first branch segment 311 and the second branch segment 312 are respectively parallel to the two right-angled sides of the first right angle 201 and intersect perpendicularly on the diagonal line where the first right angle 201 is located.

[0067] Through the above arrangement, the first radiating branch 31 is formed by the intersection of the first branch segment 311 and the second branch segment 312 to form two right angles. The shape of the first radiating branch 31 corresponds to the shape of the stacking gap 4 corresponding to the first right angle 201. The first radiating branch 31 can be accommodated in the stacking gap 4, and the first radiating branch 31 can be positioned and fixed using the stacking gap 4 corresponding to the first right angle 201 without the need for additional positioning structure.

[0068] Combine Figure 1 and Figure 2 As shown, in some embodiments, a first feeding point 313 is provided at the intersection of the first branch segment 311 and the second branch segment 312 .

[0069] With the above arrangement, the first feeding point 313 at the intersection of the first branch segment 311 and the second branch segment 312 can be used to feed the first radiating branch 31, and the first coupling branch 32 can be used to improve radiation efficiency. The radiation energy generated by the first radiating branch 31 and the first coupling branch 32 can be coupled to the metal skin 12 through the plastic bracket 11 and further radiated into free space.

[0070] Combine Figure 1 and Figure 2As shown, in some embodiments, the first coupling branch 32 includes a third branch segment 321 and a fourth branch segment 322, and the third branch segment 321 and the fourth branch segment 322 are respectively parallel to the two right-angled sides of the corresponding second right angle 202 or the third right angle 203, and intersect perpendicularly on the diagonal line where the second right angle 202 or the third right angle 203 is located.

[0071] Through the above arrangement, the first coupling branch 32 is formed by the intersection of the third branch segment 321 and the fourth branch segment 322 to form two right angles. The shape of the first coupling branch 32 corresponds to the shape of the stacking gap 4 corresponding to the second right angle 202 or the third right angle 203. The first coupling branch 32 can be accommodated in the stacking gap 4, and the first coupling branch 32 can be positioned and fixed using the stacking gap 4 corresponding to the second right angle 202 or the third right angle 203 without the need for additional positioning structure.

[0072] In some embodiments, a first return point 323 is provided at the intersection of the third branch segment 321 and the fourth branch segment 322. With the above arrangement, the first return point 323 at the intersection of the third branch segment 321 and the fourth branch segment 322 can be used to return the first coupling branch 32 to the ground, allowing the first coupling branch 32 to generate a corresponding resonant frequency, thereby improving the radiation efficiency of the first antenna assembly 3.

[0073] In some embodiments, the first antenna assembly 3 is used to transmit and receive wireless signals in a frequency band corresponding to GNSS.

[0074] GNSS, or Global Navigation Satellite System, is a space-based radio navigation and positioning system that provides users with all-weather three-dimensional coordinates, velocity, and time information anywhere on Earth's surface or in near-Earth space. It includes the Beidou Navigation Satellite System (BDS), the Global Positioning System (GPS), the GLONASS (Global Navigation Satellite System), and the Galileo Satellite Navigation System (GALILEO). Taking the Beidou Navigation Satellite System as an example, its corresponding frequency bands include but are not limited to the B1 (1575.42 MHz), B2 (1191.795 MHz), B3 (1268.52 MHz), as well as the B1C (1575.42 MHz), B2a (1176.45 MHz), and B2b (1207.14 MHz) bands, which offer varying levels of positioning accuracy.

[0075] Combine Figure 1 、 Figure 2 and Figure 3 As shown, in some embodiments, the wearable device further includes a second antenna component 5 , and the second antenna component 5 includes a second radiation branch 51 .

[0076] The second radiating branch 51 is located in the stacking gap 4 corresponding to the fourth right angle 204 of the main board 2 . The fourth right angle 204 and the first right angle 201 are respectively located at two ends of a diagonal line of the main board 2 .

[0077] Through the above arrangement, the wearable device can also arrange the second radiating branch 51 of the second antenna assembly 5 in the stacking gap 4 corresponding to the fourth right angle 204, and the fourth right angle 204 and the first right angle 201 are two relative right angles, so that the distance between the first radiating branch 31 and the second radiating branch 51 is the largest, which can prevent the two radiating branches from interfering with each other.

[0078] Combine Figure 3 As shown, in some embodiments, the second antenna assembly 5 is used to transmit and receive wireless signals in a frequency band corresponding to Bluetooth, which is 2400 MHz to 2483.5 MHz.

[0079] Combine Figure 3 As shown, in some embodiments, the second radiating branch 51 includes a fifth branch segment 511 and a sixth branch segment 512, and the fifth branch segment 511 and the sixth branch segment 512 are respectively parallel to the two right-angled sides of the fourth right angle 204, and intersect perpendicularly on the diagonal line where the fourth right angle 204 is located.

[0080] Through the above arrangement, the second radiating branch 51 is formed by the intersection of the fifth branch segment 511 and the sixth branch segment 512 to form two right angles. The shape of the second radiating branch 51 corresponds to the shape of the stacking gap 4 corresponding to the fourth right angle 204. The second radiating branch 51 can be accommodated in the stacking gap 4, and the second radiating branch 51 can be positioned and fixed using the stacking gap 4 corresponding to the fourth right angle 204 without the need for additional positioning structure.

[0081] Combine Figure 3 As shown, a second feeding point 513 is provided at the intersection of the fifth branch segment 511 and the sixth branch segment 512. The second feeding point 513 can be used to feed the second antenna assembly 5.

[0082] Combine Figure 3 As shown, in some embodiments, the wearable device is a smart bracelet or a smart watch, and the mainboard 2 has a first edge 205 corresponding to the 3 o'clock direction, a second edge 206 corresponding to the 6 o'clock direction, a third edge 207 corresponding to the 9 o'clock direction, and a fourth edge 208 corresponding to the 12 o'clock direction.

[0083] The first right angle 201 is formed by the perpendicular intersection of the first edge 205 and the fourth edge 208, the second right angle 202 is formed by the perpendicular intersection of the first edge 205 and the second edge 206, the third right angle 203 is formed by the perpendicular intersection of the third edge 207 and the fourth edge 208, and the fourth right angle 204 is formed by the perpendicular intersection of the second edge 206 and the third edge 207.

[0084] With the above arrangement, a wearable device used as a smart bracelet or smart watch is typically worn on the user's wrist. When in use, the user typically needs to raise their wrist, with the fourth edge 208 corresponding to the 12 o'clock direction facing upward. The first right angle 201 and the third right angle 203 corresponding to the fourth edge 208 are located at the top. The second edge 206 corresponding to the 6 o'clock direction faces downward, with the second right angle 202 and the fourth right angle 204 corresponding to the second edge 206 located at the bottom. Thus, when the first radiating branch 31 is arranged at the first right angle 201, the first radiating branch 31 is located upward and facing the sky, providing better antenna clearance. The radiation efficiency of the first radiating branch 31 is higher, which can improve the communication performance between the first antenna assembly 3 and the communication satellite.

[0085] Furthermore, when the first coupling branch 32 is arranged on the third right angle 203, it is also located upward, thereby providing a good clearance environment, thereby further improving the radiation efficiency of the first antenna assembly 3. Furthermore, the second right angle 202 is formed by the intersection of the second edge 206 and the first edge 205. Although the second right angle 202 faces downward, it also faces the palm side, thus providing good antenna clearance and further improving the radiation efficiency of the first antenna assembly 3.

[0086] Moreover, the two first coupling branches 32 are respectively arranged at the third right angle 203 and the second right angle 202, and the coupling superposition effect can be used to enhance the electromagnetic wave intensity of the first antenna component 3 at the 12 o'clock direction and the 3 o'clock direction, that is, the antenna radiation pattern of the first antenna component 3 can be improved, so that the first antenna component 3 has better gain at the 12 o'clock direction and the 3 o'clock direction, thereby further improving the radiation efficiency of the first antenna component 3.

[0087] In some possible implementations, reference Figure 1 、 Figure 2 and Figure 3 As shown, the wearable device further includes a strap 6, which is connected to the middle frame assembly 1 of the wearable device corresponding to the second edge 206 and the fourth edge 208. The strap 6 can be used to fix the wearable device on the user's wrist.

[0088] Combine Figure 4As shown, in some embodiments, the wearable device also includes a screen module 7, a battery 8 and a back cover 9, wherein the battery 8 and the mainboard 2 are stacked and arranged in a accommodating cavity 111 in the middle frame assembly 1, the screen module 7 is covered on the front side of the middle frame assembly 1, and the back cover 9 is covered on the back side of the middle frame assembly 1.

[0089] In some possible implementations, the screen module 7 is used to provide display and touch control functions. The screen module 7 includes a screen circuit board 71 and a screen cable 72, wherein the screen circuit board 71 is electrically connected to the mainboard 2 via the screen cable 72. Exemplarily, the screen circuit board 71 is an FPC (Flexible Printed Circuit Board), which allows for signal transmission between the screen circuit board 71 and the mainboard 2.

[0090] Figure 5 and Figure 6 The radiation efficiency of the three different embodiments of the related art and the present invention in the GNSS corresponding frequency band (taking 1.575 GHz as an example) and the Bluetooth corresponding frequency band (taking 2.45 GHz as an example) are shown respectively. Figure 1 The corresponding embodiment, embodiment 2 is Figure 2 The corresponding embodiment, embodiment 3 is Figure 3 Corresponding embodiments.

[0091] from Figure 5 As can be seen from the data, at a frequency of 1.575 GHz, the radiation efficiency of the related art is -15.2 dB; the radiation efficiency of Example 1 is approximately -13.4 dB, which is approximately 1.8 dB higher than that of the related art; the radiation efficiency of Example 2 is approximately -10.5 dB, which is approximately 4.7 dB higher than that of the related art; and the radiation efficiency of Example 3 is approximately -8.6 dB, which is approximately 7.4 dB higher than that of the related art. Therefore, it can be determined that all three embodiments provided by the present invention can improve the radiation efficiency of the first antenna assembly 3 of the wearable device in the corresponding GNSS frequency band.

[0092] from Figure 6 As can be seen from the figure, at a frequency of 2.45 GHz, the radiation efficiency of the related art is approximately -10.6 dB; the radiation efficiency of Example 1 is approximately -10.5 dB, which is approximately 0.1 dB higher than the related art; the radiation efficiency of Example 2 is approximately -10.4 dB, which is approximately 0.2 dB higher than the related art; and the radiation efficiency of Example 3 is approximately -10.3 dB, which is approximately 0.3 dB higher than the related art. Therefore, it can be determined that all three embodiments provided by the present invention can improve the radiation efficiency of the second antenna assembly 5 of the wearable device in the corresponding Bluetooth frequency band.

[0093] In the description of this specification, the reference terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention.

[0094] The above description is merely an embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A wearable device, characterized in that: The wearable device comprises: a middle frame component (1), a mainboard (2) and a first antenna component (3); The middle frame assembly (1) comprises a plastic bracket (11) and a metal skin (12), wherein the metal skin (12) covers the outer side surface of the plastic bracket (11), and an accommodating cavity (111) is provided inside the plastic bracket (11); The main board (2) is located in the accommodating cavity (111), and a stacking gap (4) is provided between the outer peripheral side of the main board (2) and the inner peripheral side of the accommodating cavity (111); The first antenna component (3) includes a first radiation branch (31) and at least one first coupling branch (32); The first radiation branch (31) and the at least one first coupling branch (32) are arranged in the stacking gap (4) at intervals.

2. The wearable device according to claim 1, wherein: The plastic bracket (11) is a rectangular frame structure, and the accommodating cavity (111) is a rectangular cavity; The main board (2) is rectangular; The first radiation branch (31) is located in the stacking gap (4) corresponding to the first right angle (201) of the main board (2), and the at least one first coupling branch (32) is located in the stacking gap (4) corresponding to the second right angle (202) and / or the third right angle (203) of the main board (2), and the second right angle (202) and the third right angle (203) are respectively located on both sides of the first right angle (201) and are respectively adjacent to the first right angle (201).

3. The wearable device according to claim 2, wherein: The first radiating branch (31) includes a first branch segment (311) and a second branch segment (312), wherein the first branch segment (311) and the second branch segment (312) are respectively parallel to two right-angled sides of the first right angle (201) and intersect perpendicularly on the diagonal line where the first right angle (201) is located.

4. The wearable device according to claim 3, wherein: A first feeding point (313) is provided at the intersection of the first branch segment (311) and the second branch segment (312).

5. The wearable device according to claim 2, wherein: The first coupling branch (32) includes a third branch segment (321) and a fourth branch segment (322), wherein the third branch segment (321) and the fourth branch segment (322) are respectively parallel to two right-angled sides of the corresponding second right angle (202) or the third right angle (203), and intersect perpendicularly on the diagonal line where the second right angle (202) or the third right angle (203) is located.

6. The wearable device according to claim 5, characterized in that A first return point (323) is provided at the intersection of the third branch segment (321) and the fourth branch segment (322).

7. The wearable device according to claim 1, wherein: The first antenna component (3) is used for transmitting and receiving wireless signals in a frequency band corresponding to GNSS.

8. The wearable device according to any one of claims 2 to 6, characterized in that: The wearable device further comprises a second antenna component (5), wherein the second antenna component (5) comprises a second radiation branch (51); The second radiation branch (51) is located in the stacking gap (4) corresponding to the fourth right angle (204) of the main board (2), and the fourth right angle (204) and the first right angle (201) are respectively located at two ends of a diagonal line of the main board (2).

9. The wearable device according to claim 8, wherein: The second radiating branch (51) includes a fifth branch segment (511) and a sixth branch segment (512), wherein the fifth branch segment (511) and the sixth branch segment (512) are respectively parallel to two right-angled sides of the fourth right angle (204) and intersect perpendicularly on the diagonal line where the fourth right angle (204) is located.

10. The wearable device according to claim 8, wherein: The second antenna assembly (5) is used for transmitting and receiving wireless signals in a frequency band corresponding to Bluetooth.

11. The wearable device according to claim 8, wherein: The wearable device is a smart bracelet or a smart watch, and the mainboard (2) has a first edge (205) corresponding to the 3 o'clock direction, a second edge (206) corresponding to the 6 o'clock direction, a third edge (207) corresponding to the 9 o'clock direction, and a fourth edge (208) corresponding to the 12 o'clock direction; The first right angle (201) is formed by the perpendicular intersection of the first edge (205) and the fourth edge (208), the second right angle (202) is formed by the perpendicular intersection of the first edge (205) and the second edge (206), the third right angle (203) is formed by the perpendicular intersection of the third edge (207) and the fourth edge (208), and the fourth right angle (204) is formed by the perpendicular intersection of the second edge (206) and the third edge (207).

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