CN212342812U

CN212342812U - Wearable device

Info

Publication number: CN212342812U
Application number: CN202021725778.6U
Authority: CN
Inventors: 赵安平; 任周游; 李明洋; 赵亚军
Original assignee: Anhui Huami Information Technology Co Ltd
Current assignee: Anhui Huami Information Technology Co Ltd
Priority date: 2020-08-18
Filing date: 2020-08-18
Publication date: 2021-01-12
Anticipated expiration: 2030-08-18

Abstract

The utility model relates to an electronic equipment technical field specifically provides a wearable equipment, includes: the metal shell comprises a bottom shell and a frame, the bottom shell and the frame are connected to form a shell structure with one side open, and the equipment mainboard is arranged inside the shell; the screen assembly is arranged at the open end of the shell and comprises a cover plate, the cover plate is provided with a connecting part which is abutted against the end face of the open end of the shell, a groove is formed in the inner side wall of the connecting part, and the projection of the groove on the plane of the bottom shell is superposed with the projection of the connecting part on the plane of the bottom shell; and the antenna structure comprises a radiator, a feed terminal and a ground terminal, wherein the feed terminal and the ground terminal are electrically connected with the radiator and the equipment mainboard, and the radiator is arranged in the groove. The wearable device disclosed by the invention can realize the antenna structure design of the all-metal shell device and has better structural strength and appearance integrity of the device.

Description

Wearable device

Technical Field

The utility model relates to an electronic equipment technical field, concretely relates to wearable equipment.

Background

With the development of electronic devices, smart wearable devices are increasingly popular with multiple users due to their diverse functions. Taking a smart watch as an example, a general smart watch integrates a plurality of functions such as motion assistance, track positioning, connection with an intelligent terminal and the like in addition to a basic timing function. To achieve these functions, a built-in antenna is required in the smart watch to receive and radiate signals. For example, to receive GPS signals, a watch requires a GPS positioning antenna; for another example, the watch also needs a bluetooth antenna for information interaction and connection with a mobile phone, and the like.

With the development of wearable devices, more and more smart watches employ all-metal housings. The all-metal shell refers to that the bottom shell and the middle frame of the watch are both made of metal materials, for example, the all-metal shell can be made in a mode that the bottom shell and the metal middle frame are integrally formed, and can also be electrically connected together in a connection mode such as screws. The metal shell has better protective capability, and the appearance quality and the grade of the watch are greatly improved. However, the all-metal case also shields the internal antenna of the wristwatch, and this makes it difficult to design the antenna, and therefore, how to design the all-metal case antenna is an important research direction.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem of antenna design of wearable devices with all-metal housings, the embodiments of the present disclosure provide a wearable device.

In a first aspect, the disclosed embodiments provide a wearable device, including:

the equipment comprises a metal shell, a power supply and a control module, wherein the metal shell comprises a bottom shell and a frame, the bottom shell and the frame are connected to form a shell structure with one open side, and an equipment mainboard is arranged in the shell;

the screen assembly is arranged at the open end of the shell and comprises a cover plate, the cover plate is provided with a connecting part which is abutted against the end face of the open end of the shell, the inner side wall of the connecting part is provided with a groove, and the projection of the groove on the plane of the bottom shell is superposed with the projection of the connecting part on the plane of the bottom shell; and

the antenna structure comprises a radiating body, a feed terminal and a ground terminal, wherein the feed terminal and the ground terminal are electrically connected with the radiating body and the equipment mainboard, and the radiating body is arranged in the groove.

In some embodiments, the radiator is molded on an inner surface of the groove.

In some embodiments, a lining layer is coated between the radiator and the inner surface of the groove.

In some embodiments, the groove is a circular arc groove.

In some embodiments, the wearable device further comprises:

and the support structure is matched with the groove in shape, and the radiator is fixedly arranged in the groove through the support structure.

In some embodiments, the antenna structure includes a slot antenna, and the radiator, the bezel, and a slot therebetween form the slot antenna.

In some embodiments, the groove is circumferentially disposed around the connection portion of the cover plate, and the radiator of the slot antenna is circumferentially disposed in the groove.

In some embodiments, the antenna structure comprises an inverted-F antenna.

In some embodiments, the antenna structure comprises at least one of:

a satellite positioning antenna, a Bluetooth antenna, a WiFi antenna, a 4G LTE antenna or a 5G antenna.

In some embodiments, the wearable device is a smart watch or a smart bracelet.

The wearable device provided by the embodiment of the disclosure comprises a metal shell and a screen assembly arranged at the open end of the shell, wherein the screen assembly comprises a cover plate, and the connecting part of the cover plate is abutted and assembled with the end surface of the open end of the shell. The inner side wall of the cover plate connecting part is provided with a groove, and the radiator of the antenna structure is arranged in the groove, so that the radiator in the groove, the device mainboard in the shell, the feed terminal and the ground terminal form the antenna structure of the device. The radiator of the antenna is arranged in the groove of the cover plate, so that the influence of the metal shell on the performance of the antenna is avoided, and the antenna design of the all-metal shell device is realized. And through set up the irradiator in the apron recess, need not to carry out trompil or components of a whole that can function independently design to the frame of casing, improve the intensity and the leakproofness of equipment shell. And the radiator of antenna sets up in the recess of apron inner wall, does not have any destruction to equipment outward appearance, improves the wholeness and the pleasing to the eye degree of equipment outward appearance. In addition, the antenna radiating body is arranged in the groove of the cover plate connecting part, so that the antenna radiating body is far away from a touch or display device of the screen assembly as far as possible, the radiation loss is reduced, and the antenna radiation efficiency is improved. Furthermore, through the radiator in the cover plate groove, under the condition that the appearance of the device is not influenced, the slot antenna can be realized by the metal frame, the inverted-F antenna can also be realized by the radiator in the groove, the better design freedom degree is realized, and under the condition that the same antenna function is realized, the inverted-F antenna can be realized by utilizing a shorter space, so that an annular groove does not need to be formed, and the processing structure and the complexity are reduced.

According to the wearable device provided by the embodiment of the disclosure, the radiator is formed on the inner surface of the groove, for example, the antenna radiator is formed on the surface of the groove by using an LDS (Laser-Direct-Structuring) processing process, and the radiator does not need to be separately processed, so that the processing complexity is reduced. And a substrate coating is coated between the radiating body and the inner surface of the groove, and the antenna radiating body is shielded or blackened by the substrate coating, so that the radiating body arranged in the groove cannot influence the appearance of the equipment, and the integrity and the attractiveness of the appearance of the equipment are improved. The groove is an arc-shaped groove, and the arc-shaped groove surface can effectively guide laser beams into all positions in the groove, so that the antenna radiator can be conveniently processed by utilizing a laser etching technology.

The wearable equipment that this disclosed embodiment provided still includes bearing structure, bearing structure and recess form fit to utilize bearing structure to set up the antenna radiator in the recess, need not to form the radiator in the apron recess, reduce the processing degree of difficulty and cost.

In the wearable device of the embodiment of the present disclosure, the antenna structure may include a slot antenna or an inverted-F antenna, for example, the slot antenna may be formed by the radiator and the metal frame in the groove and the slot therebetween, so that the antenna radiator may surround the device for one circle, and the antenna structure is set by using the slot space of one circle of the device. For example, the inverted-F antenna can be formed by the radiator in the groove, the ground terminal and the feed terminal, the radiator of the inverted-F antenna occupies a small space, the opening length of the groove can be correspondingly reduced, and the processing is convenient.

Drawings

In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic cross-sectional structure diagram of a wearable device according to some embodiments of the present disclosure.

Fig. 2 is an exploded view of a wearable device according to some embodiments of the present disclosure.

Fig. 3 is a schematic antenna diagram of a wearable device in some embodiments according to the present disclosure.

Fig. 4 is an exploded view of a wearable device in accordance with further embodiments of the present disclosure.

Fig. 5 is a schematic diagram of an antenna of a wearable device according to further embodiments of the present disclosure.

Fig. 6 is a graph of antenna efficiency for a free state versus a worn state for a slot antenna in accordance with some embodiments of the present disclosure.

Fig. 7 is an antenna efficiency graph of a free state versus a worn state of an IFA antenna in accordance with some embodiments of the present disclosure.

Fig. 8 is a schematic cross-sectional structure of a wearable device according to further embodiments of the present disclosure.

Fig. 9 is an exploded view of a wearable device according to still further embodiments of the present disclosure.

Description of reference numerals:

100-a housing; 110-a frame; 120-a bottom shell; 200-a cover plate; 210-a display section; 220-a connecting portion; 230-a groove; 310-equipment mainboard; 320-a radiator; 330-spring plate; 340-a battery; 400-support structure.

Detailed Description

The technical solutions of the present disclosure will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only some embodiments of the present disclosure, but not all embodiments. All other embodiments, which can be derived by one of ordinary skill in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure. In addition, technical features involved in different embodiments of the present disclosure described below may be combined with each other as long as they do not conflict with each other.

For smart wearable devices, they often contain multiple antennas, such as bluetooth antennas for establishing a connection with a smartphone; also for example GPS satellite positioning antennas for positioning; for example, an LTE antenna for implementing base station communications; etc., the device may radiate or receive signals to the outside through the antenna radiator.

For example, a smart watch generally can implement functions such as motion assistance and trajectory positioning, and therefore generally includes at least one bluetooth antenna and one satellite positioning antenna. In a watch with a common plastic shell, an internal antenna can directly radiate and receive signals outwards, the antenna structure is easy to design, electromagnetic signals can be shielded with the increase of metal in the shell, and the design requirement of the antenna structure is higher and higher.

For example, the middle frame part of part wrist-watch adopts the metal middle frame, and the drain pan adopts non-metallic material such as plastic, and the antenna accessible metal middle frame and the gap of mainboard realize this moment to both sides outwards radiate the signal about passing through the middle frame. And when the wrist-watch adopted all metal casing, for example watch case's drain pan and center adopt metal material integrated into one piece, because the drain pan also is the metal material, the unable rethread mainboard of antenna and the gap of center are to toward radiation for built-in antenna's the design degree of difficulty greatly increased.

In the related art, in order to implement an antenna structure with an all-metal case, in some watches, a middle frame is provided with a circular gap from the middle, the middle frame is divided into two independent upper and lower parts, a slot antenna is formed by the circular gap on the middle frame, and a signal is radiated outward by the slot antenna. The structure needs to completely divide the metal middle frame, and non-metal materials are injected into the annular gap to form an integral appearance and seal, so that the structural strength and the dustproof and waterproof performance are greatly reduced, the gap length surrounds the watch for one circle, the gap appearance is sharp after the gap is filled and injected, the integrity is poor, and the watch appearance and the watch grade are reduced.

To address the above-described deficiencies in the related art, the present disclosure provides a wearable device. The wearable device in the embodiment of the present disclosure is applicable to wearable devices with all metal housings of any type, such as watch-type devices, e.g., smartwatches, smartbands, and the like; glass equipment such as intelligent glasses, VR glasses and AR glasses; for example, wearing equipment such as intelligent clothes and wearing pieces; etc., to which the present disclosure is not limited.

In some embodiments, a wearable device of the present disclosure includes a housing, a screen assembly, and an antenna structure. The shell is an all-metal shell and comprises a bottom shell and a frame arranged around the edge of the bottom shell, so that the bottom shell and the frame form a shell structure with one side open. Taking the intelligent watch as an example, the casing of the watch comprises a peripheral frame and a bottom shell, wherein the peripheral frame and the bottom shell are made of metal materials, the peripheral frame and the bottom shell can be made in a mode of integrally forming the bottom shell and a metal middle frame, and the peripheral frame and the bottom shell can also be connected together to form a metal casing in a connecting mode such as screws.

The inside of casing installs equipment mainboard (pcb), battery, and other components and parts, and the equipment mainboard is the pcb, and it has treater and corresponding control circuit module to integrate on it. Since the present disclosure relates only to the antenna structure, further description of other extraneous electrical elements and circuit modules is omitted, but those skilled in the art will certainly appreciate this.

The screen assembly is a display screen assembly of the device, which is disposed at the open end of the housing, thereby serving as a display screen of the device. The screen assembly is generally a multi-layered stacked structure, and the outermost layer thereof is a cover plate, such as a glass cover plate, etc., which functions to protect the inner screen and to assemble the screen assembly. The screen assembly further includes a display layer, a light emitting layer, a touch layer, etc., and since the present disclosure only relates to the assembly of the cover plate and the housing, the description of other screen elements is omitted, but it can be understood and implemented by those skilled in the art.

Taking a smart watch as an example, when a screen assembly of the watch is assembled, fixed assembly can be generally realized by dispensing and bonding the edge of the cover plate and the end face of the open end of the shell, and the dispensing and bonding position is used as a non-display area of the screen assembly, namely a 'black edge' of the peripheral edge of the screen. In the present disclosure, a position on the cover plate corresponding to the display area is defined as a "display portion", and a non-display area corresponding to the housing adhesive assembly is defined as a "connection portion", i.e., the connection portion indicates a position on the cover plate for assembly connection with the housing.

The inner side wall of the connecting part of the cover plate is provided with a groove, and the projection of the groove on the plane of the bottom shell coincides with the projection of the connecting part on the screen of the bottom shell. That is, the concave direction of the groove is toward the direction in which the wall thickness of the connecting portion becomes thin, so that after the groove is formed, the groove is located right above the position where the connecting portion abuts against the bezel.

The antenna structure comprises a radiating body, a feed terminal and a ground terminal, wherein the feed terminal is a feed point of the antenna and is bridged between a feed circuit module of the equipment mainboard and the radiating body so as to form an excitation source of the antenna and enable the radiating body to radiate resonant electromagnetic waves outwards, and the ground terminal is a return point of the antenna and is bridged between the radiating body and a ground point of the equipment mainboard.

The radiator of the antenna is disposed in the groove of the cover plate, and the radiator may be formed in the groove by, for example, a laser forming technique, or may be fixed in the groove by a support structure or the like. The processing and arrangement of the radiator will be described in detail hereinafter, and will not be described in detail. The Antenna formed by the radiator and the device board may be any type of Antenna, such as an IFA (Inverted F Antenna), a slot Antenna, etc., which is not limited by the present disclosure, and the structure of the different types of antennas will be described in detail below, which will not be described in detail herein.

In the embodiment of the present disclosure, the radiator of the antenna is disposed in the groove of the cover plate of the screen assembly, and the groove is located in the screen assembly above the housing, so that the influence of the metal bottom shell and the frame below on the radiation of the antenna is avoided, and the antenna design of the all-metal housing device is implemented. And will set up the irradiator through seting up the recess on the screen subassembly, need not to carry out the design of trompil or components of a whole that can function independently to the metal frame, improve the intensity and the leakproofness of equipment shell, also need not to carry out treatments such as moulding plastics to the frame outward appearance simultaneously just, do not have any destruction to the equipment outward appearance, improve the wholeness and the pleasing to the eye degree of equipment outward appearance. In addition, the radiator in the embodiment is located in the groove of the connecting portion, so that the radiator is far away from a touch and display area of the screen assembly as far as possible, radiation loss is reduced, and antenna radiation efficiency is improved.

For further explanation, the wearable device of the present disclosure is described in detail below with reference to fig. 1 to 9. For convenience of illustration, the wearable device in fig. 1 to 9 is an example of a smart watch, and for the smart watch, the wearable device generally includes at least a bluetooth antenna and a GPS satellite positioning antenna, so the following description will be given by taking an example in which the antenna includes a bluetooth antenna and a GPS satellite positioning antenna. However, it should be understood by those skilled in the art that the wearable device of the present disclosure is not limited to a smart watch, and the antenna structure is not limited to a bluetooth antenna and a GPS antenna, but may be any other wearable device or antenna structure suitable for implementation, which is not described in detail herein.

One embodiment of the wearable device of the present disclosure is shown in fig. 1-3. As shown in fig. 1 to 3, the wearable device of the present disclosure includes an all-metal housing 100, the housing 100 includes a bottom shell 120 and a bezel 110, and in this embodiment, the bottom shell 120 and the bezel 110 are integrally formed of a metal material. The bottom shell 120 is a bottom shell close to the arm of the human body, the frame 110 is a metal middle frame surrounding the edge of the bottom shell 120, and the bottom shell 120 and the frame 110 form a groove-shaped shell 100 structure with an open top.

The device main board 310, the battery 340 and other electrical components for implementing the corresponding functions of the smart watch are assembled inside the housing 100, and since the present embodiment only relates to the antenna structure of the watch, the drawings of the electrical components that are not related to the present embodiment are not shown, but those skilled in the art should understand and can implement the above embodiments, and the detailed description of the present disclosure is omitted here.

The screen assembly is disposed at the upper open end of the casing 100, the screen assembly is a multi-layer stacked structure, and includes a cover plate 200, and further includes components such as a display layer, a touch layer, a light emitting layer, and the like below the cover plate 200.

The cover plate 200 is a transparent glass cover plate, the position of the display area in the middle of the screen assembly is a display part 210, the edge of the periphery of the display part 210 is a connecting part 220, the connecting part 220 is in butt joint with the open end face of the casing 100, and when the screen assembly is assembled with the casing 100, the adhesive bonding is carried out through the connecting part 200 and the end face of the frame 110, so that the screen assembly is fixedly assembled on the casing 100. After the assembly of the screen assembly is completed, the display portion 210 serves as a display area of the watch, and the connecting portion 220 serves as a non-display area of one turn of the display area of the watch, i.e., a "black border".

As shown in fig. 1, a groove 230 is formed on an inner sidewall of the connection portion 220, and the groove 230 may be formed on the inner sidewall of the connection portion 220 of the cap plate 200 by a Computer Numerical Control (CNC) process. In the present embodiment, the radiator 320 of the antenna is disposed on the inner surface of the groove 230, and the radiator 320 is formed on the surface of the groove 230 by, for example, laser forming (LDS), and the processing of the radiator will be described in detail hereinafter, which will not be described in detail herein.

It should be noted that the groove 230 serves to accommodate the radiator 320, and therefore the groove 230 may be formed around the cover 200, or may be formed correspondingly according to the length of the radiator 320, which is not limited in the present disclosure. In the present embodiment, the antenna structure of the watch is a slot antenna, and since the slot length of the slot antenna is 1/2 wavelengths, considering that the slot lengths of the bluetooth antenna and the GPS antenna basically need to surround one circle of the watch, the groove 230 may be formed to surround one circle of the cover plate 200, and the radiator 320 in the groove 230 is correspondingly formed in an annular structure.

In addition, in the present embodiment, the radiator 320 having a ring shape is directly formed in the recess 230 through the LDS process, and the radiator 320 and the cover plate 200 are illustrated as separate structures in the exploded structure of fig. 2 for the sake of structural clarity. Of course, in other embodiments, the radiator 320 may be separately processed, and the radiator 320 is disposed in the groove 230 after the processing, which is not limited by the present disclosure.

As shown in fig. 1, since the groove 230 is located right above the metal frame 110, the radiator 320 formed in the groove 230 is also located right above the frame 110, so that the radiator 220, the frame 110 and the gap therebetween form a slot antenna structure.

For a slot antenna, the effective electrical length of the slot is typically 1/2 wavelengths of the antenna center operating frequency, so the corresponding slot length can be calculated from the operating frequencies of the bluetooth antenna and the GPS satellite positioning antenna, and the slot can be divided by bridging a ground terminal in the slot. The following description will be given taking a GPS satellite positioning antenna as an example.

For a slot antenna, the relationship between the slot length L and the operating frequency f of the electromagnetic wave is expressed as:

in the formula (1), the slot length of the L slot antenna, λ represents the wavelength of the electromagnetic wave, C represents the speed of light, and f represents the resonance frequency of the electromagnetic wave.

Taking a GPS satellite positioning antenna as an example, the central working frequency f of the civil L1 frequency band of the GPS antenna is about 1.575GHz, and the slot length of the GPS antenna can be calculated and obtained by substituting formula (1)_g. Similarly, the central working frequency f of the bluetooth antenna is about 2.4GHz, and the length of the slot of the bluetooth antenna can be calculated to be L_b。

After the slot lengths of the GPS antenna and the bluetooth antenna are obtained, the slots may be divided by bridging the ground terminal in the slots. In this embodiment, as shown in fig. 2, a ground terminal and a feed terminal are disposed at corresponding positions on the radiator 320, and a metal elastic sheet 330 is disposed at corresponding positions on the device board 310, the elastic sheet 330 is electrically connected to the feed circuit module and the ground module on the device board 310, and its elastic body end is used to abut against the ground terminal and the feed terminal of the radiator 320, thereby forming a complete antenna loop.

Note that, in the present embodiment, the feed terminal and the ground terminal of the radiator 320 are integrally formed with the radiator 320, that is, the feed terminal and the ground terminal are directly formed at corresponding positions when the radiator 320 is formed. It is understood that the radiator 320 and the feeding terminal and the grounding terminal may be in a separate structure, that is, the feeding terminal and the grounding terminal are electrically connected to the radiator 320 by coupling. The present disclosure is not so limited.

After the antenna structure is assembled, the structures of the bluetooth antenna and the GPS satellite positioning antenna in the present embodiment are shown in fig. 3. In FIG. 3, the length of the gap between "ground 1-feed 1-ground 2" is L_gShape of itBecomes a GPS satellite positioning antenna. And the length of the gap of 'ground 3-feed 2-ground 4' is L_bWhich forms a bluetooth antenna.

In the embodiment, the GPS satellite positioning antenna and the Bluetooth antenna adopt continuous grounding terminals of ground 1 and ground 4, and ground 2 and ground 3, so that the GPS antenna and the Bluetooth antenna have better isolation, and the antenna efficiency is improved. Those skilled in the art will appreciate that in other embodiments, the two antennas may use the same ground terminal, and the description thereof is omitted.

As can be seen from the above, in the present embodiment, the antenna structure is implemented by using a slot antenna, and the radiator 320 and the frame 110 form the slot antenna, so that the frame 110 does not need to be perforated or designed separately, the integrity of the frame 110 is maintained, and the strength and the waterproof sealing performance of the device housing are improved. And since the radiator 320 is located in the inner groove 230 of the cover 200, there is no damage to the appearance of the device, so that the appearance integrity and beauty of the device are better. In addition, the decorative structure is arranged on the inner wall of the groove 230, so that the groove 230 forms a cover plate internal decorative structure which is visible from the appearance, and the attractiveness of the equipment is improved.

In addition, it should be noted that, referring to fig. 1, the middle portion of the cover plate 200 is a display portion 210 corresponding to the display area of the screen, and for the smart watch, a display element, such as a light emitting layer, a display layer, and other components for displaying images, is included below the display portion 210; the touch screen also comprises a touch element, such as a touch layer and other components for detecting human touch signals. These elements are made of high loss materials, and in case the radiator of the antenna is close (e.g. within 3 mm) to these elements, the electromagnetic field from the antenna will be absorbed by these high loss materials and thus reduce the radiation efficiency of the antenna. Besides, metal materials, such as NFC antenna coils and the like, are disposed below the display area of a general smart watch, and if the radiator of the antenna is closer to the metal materials, the radiation efficiency of the antenna is also affected.

In the present embodiment, the groove 230 is formed on the inner sidewall of the connection portion 220, and the antenna radiator 320 is disposed in the groove 230, so that the radiator 320 is far away from a high-loss material or a metal material inside the device as much as possible, thereby improving the radiation efficiency of the antenna.

In the embodiment of fig. 1, the antenna radiator 320 is located over the metal bezel 110, and therefore, a slot antenna structure may be implemented by using a slot therebetween, but the antenna structure of the wearable device in the embodiments of the present disclosure is not limited to the slot antenna, and other types of antennas, such as an Inverted F Antenna (IFA), a monopole antenna, and the like, may also be implemented. An embodiment of implementing the bluetooth antenna and the GPS satellite positioning antenna using the IFA antenna is shown in fig. 4 and 5, which will be described in detail below.

In the present embodiment, the bluetooth antenna and the GPS antenna are implemented by using the IFA antenna, and the IFA antenna is implemented without using a slot, so that the slot between the radiator 320 and the frame 110 does not need to be considered when the antenna is installed in the present embodiment. And the IFA antenna is an 1/4 wavelength antenna, i.e. the length of the radiator 320 is 1/4 of the wavelength of the antenna's central operating frequency.

For an IFA antenna, the relationship between the radiator length L and the operating frequency f of the electromagnetic wave is expressed as:

in the formula (2), the slot length of the L slot antenna, λ represents the wavelength of the electromagnetic wave, C represents the speed of light, and f represents the resonance frequency of the electromagnetic wave.

Taking a GPS satellite positioning antenna as an example, the central operating frequency f of the civilian L1 frequency band of the GPS antenna is about 1.575GHz, and the length L of the GPS antenna radiator 321 can be calculated by substituting formula (2)_g. Similarly, the central operating frequency f of the bluetooth antenna is about 2.4GHz, and the length of the radiator 322 of the bluetooth antenna can be calculated to be L_b。

After the lengths of the

radiators

321 and 322 of the GPS antenna and the bluetooth antenna are obtained, the

radiators

321 and 322 of the corresponding lengths may be formed in the groove 230. It should be noted that, for the parts which are not described in detail in this embodiment, the description can be given by referring to the embodiment in fig. 1, and the parts which are the same as the foregoing embodiment in this embodiment are not described again.

After the antenna structure is assembled, the structures of the bluetooth antenna and the GPS satellite positioning antenna in the present embodiment are shown in fig. 5. In fig. 5, the length of the radiator 321 is L_gAnd the ground 1-feed 1-radiator 321 forms a GPS satellite positioning antenna. The length of the radiator 322 is L_bThe "ground 2-feed 2-radiator 322" forms a bluetooth antenna.

It can be seen that in the present embodiment, the

radiators

321 and 322 are also located in the groove 230, so that the appearance of the device is not damaged, and the waterproof sealing performance and the appearance consistency and the appearance beauty of the device are improved. And the

radiators

321 and 322 are located on the metal frame 110, so that the metal frame 110 does not affect the antenna, and the antenna design of the all-metal shell is realized.

As can be seen from fig. 1 and 4, the antenna structure in the wearable device of the present disclosure can be implemented by using both a slot antenna and an IFA antenna, and has a better degree of freedom in antenna design. For example, for a smart watch, the bluetooth antenna and the GPS antenna may both be implemented by using a slot antenna, may also both be implemented by using an IFA antenna, and may also be implemented by using a slot antenna and an IFA antenna, which is not limited by this disclosure.

It should be noted that, in the embodiment of fig. 4, since the length of the

radiators

321 and 322 is small, the groove 230 may be correspondingly disposed without surrounding the cover plate for a circle, but rather, the groove is formed corresponding to the length of the radiator, so as to reduce the processing cost and time compared to the slot antenna. Of course, the groove 230 may be opened around the cover plate 200, and the disclosure is not limited thereto.

Furthermore, considering that the cover 200 is generally a transparent glass cover, the radiator 320 disposed in the recess 230 can be viewed from the external appearance, and for a ring radiator, the ring radiator itself can be used as an external decoration to improve the aesthetic quality, but for an IFA antenna radiator, it is difficult to achieve complete symmetry. Therefore, in order to further improve the aesthetic degree of the appearance of the device, a substrate coating may be coated between the radiator and the inner surface of the groove, and the coating may adopt colors such as black, blue, and the like, so that on one hand, the antenna radiator 320 may be shielded, and on the other hand, the substrate coating may be used as an appearance decoration of a watch, and a good appearance design such as a striking color or a decoration strip may be provided for the device through color matching.

Because the design difficulty of the GPS satellite positioning antenna is far greater than that of the Bluetooth antenna, the experimental research is only carried out on the performance of the GPS antenna in the two implementation modes. Fig. 6 shows antenna efficiency curves of the GPS antenna in the embodiment of fig. 1 in a free state and an arm-worn state. Fig. 7 shows antenna efficiency curves of the GPS antenna in the embodiment of fig. 4 in a free state and an arm-worn state.

As can be seen from fig. 6 and 7, the GPS antenna in the embodiment of the present disclosure, no matter the GPS antenna employs the slot antenna or the IFA antenna, has good antenna efficiency in the arm wearing state, meets the antenna design requirement of the watch, and has good arm wearing performance. It is further demonstrated that the antenna structure of the embodiments of the present disclosure can selectively employ a slot antenna or an IFA antenna, and has a good degree of freedom in antenna design.

In addition, in the above embodiment, the radiator 320 of the antenna is formed on the inner surface of the groove 230 by the LDS process, and therefore, the groove 230 is preferably a circular arc groove. This is because the circular arc-shaped inner surface can more effectively introduce the laser beam to various positions when processed by the LDS process, so that the shaping of the radiator 320 based on the laser engraving technique can be more effectively completed.

In other embodiments, the radiator 320 may be provided separately from the cover plate 200, that is, the radiator and the cover plate are separately machined and assembled, so that the groove 230 does not need to be an arc groove. For example, fig. 8 and 9 illustrate one embodiment of the smart watch of the present disclosure. In the following description, the same parts as those of the above-described embodiments will not be described again, and those skilled in the art will understand and fully implement the same in combination with the above-described embodiments.

As shown in fig. 8 and 9, in the present embodiment, the radiator 320 is fixed in the groove 230 by using the support structure 400. As can be seen from fig. 8, in the present embodiment, the groove 230 is a groove having a rectangular cross section, and the support structure 400 is also a rectangular cross section that is shape-fitted to the groove 230, so that the radiator is disposed on the upper surface of the support structure 400 to be fitted into the groove 230 together with the support structure 400.

The support structure 400 may be made of a non-conductive material, and the radiator 320 and the support structure 400 may be assembled in different manners according to the material of the support structure 400.

In one example, the support structure 400 is made of an LDS substrate, and the radiator 320 may be formed on the upper surface of the support structure 400 through an LDS process.

In another example, the support structure 400 is made of a non-LDS substrate, such as a common plastic or ceramic material, and the radiator 320 may be formed on the upper surface of the support structure through a process of PDS (Printing-Direct-Structuring).

In yet another example, the radiator 320 may be assembled after being separately processed from the support structure 400.

As shown in fig. 8, in the present embodiment, when the connection portion 220 of the cover plate 200, the support structure 400 and the frame 110 are bonded by dispensing, although the antenna radiator is located on one of the bonding surfaces, the thickness of the radiator 320 is small (about 50 μm), and experiments prove that the waterproof grade and the sealing property of the dispensing surface are not affected.

Of course, it can be understood that fig. 8 and fig. 9 illustrate an embodiment of a slot antenna, and for this embodiment, the antenna structure may also be implemented by using an IFA antenna, which can be implemented by referring to the foregoing description by those skilled in the art, and details of this are not described again.

As can be seen from the foregoing, in the present embodiment, the supporting structure is matched with the groove in shape, so that the antenna radiator is disposed in the groove by using the supporting structure, and the radiator does not need to be formed in the groove of the cover plate, which can correspondingly reduce the processing difficulty and cost.

In the above embodiments, the antenna structure of the wearable device is described by taking a bluetooth antenna and a GPS satellite positioning antenna as examples, and it is understood that in other embodiments, the antenna structure may also be any other antenna or antenna combination suitable for implementation, such as a GPS antenna, a beidou satellite positioning antenna, a bluetooth antenna, a WiFi antenna, a 4G LTE antenna, or a 5G antenna, and the disclosure does not need to be limited thereto.

In addition, the embodiment of the disclosure also provides an antenna processing method, which can be applied to the wearable device of any embodiment, so as to process the device antenna. In some embodiments, the processing method of embodiments of the present disclosure comprises:

a groove is formed in the inner side wall of the connecting part of the cover plate; the cover plate is a cover plate layer of a screen assembly of the wearable device, and the connecting part is a part where the cover plate is abutted against the end face of the open end of the shell of the wearable device; the projection of the groove on the plane of the bottom shell of the shell is superposed with the projection of the connecting part on the plane of the bottom shell;

and coating a metal coating with metal particles on the inner surface of the groove, and processing the metal coating to obtain the radiator of the antenna.

In some embodiments, before coating the inner surface of the groove with the metal coating layer with the metal particles, the method further comprises:

a substrate coating is applied to the interior surfaces of the recess.

In some embodiments, a radiator of an antenna is processed on a metal coating, comprising:

and (3) laser etching the wiring structure of the antenna on the metal coating, and chemically plating the area of the wiring structure to obtain the radiator.

Specifically, in one example, the wearable device is illustrated in fig. 1 as an example. First, an annular groove 230 is opened on an inner side surface of the connection portion 220 of the cap plate 200 by, for example, a CNC machining process. The inner wall of the annular groove 230 is uniformly coated with a substrate coating, which is described above and will not be described herein. And then spraying a metal coating with metal particles on the substrate coating, wherein the metal coating is a base layer of the radiator laser etching. Laser is used for etching the trend structure of the antenna radiator on the metal coating, and finally chemical plating is carried out on the routing area of the laser etching, namely LDS technology is adopted to form the radiator routing of the antenna on the inner surface of the groove 230, so that the radiator 230 of the antenna is obtained.

By the aid of the wearable device and the antenna processing method thereof, the radiator of the antenna is arranged in the groove of the cover plate, so that the influence of the metal shell on the performance of the antenna is avoided, and the antenna design of all-metal shell equipment is achieved. And through set up the irradiator in the apron recess, need not to carry out trompil or components of a whole that can function independently design to the frame of casing, improve the intensity and the leakproofness of equipment shell. And the radiator of antenna sets up in the recess of apron inner wall, does not have any destruction to equipment outward appearance, improves the wholeness and the pleasing to the eye degree of equipment outward appearance. In addition, the antenna radiating body is arranged in the groove of the cover plate connecting part, so that the antenna radiating body is far away from a touch or display device of the screen assembly as far as possible, the radiation loss is reduced, and the antenna radiation efficiency is improved. Furthermore, the radiator in the groove of the cover plate can be used for realizing a slot antenna with a metal frame, or can be used for realizing an inverted-F antenna or other types of antennas (such as a monopole antenna) by using the radiator in the groove, so that the design freedom is higher.

It should be understood that the above embodiments are only examples for clearly illustrating the present invention, and are not intended to limit the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the present disclosure may be made without departing from the scope of the present disclosure.

Claims

1. A wearable device, comprising:

2. The wearable device of claim 1,

the radiator is formed on the inner surface of the groove.

3. The wearable device of claim 2,

a lining layer is coated between the radiator and the inner surface of the groove.

4. Wearable device according to claim 2 or 3,

the groove is an arc groove.

5. The wearable device of claim 1, further comprising:

6. The wearable device of claim 1,

the antenna structure comprises a slot antenna, and the radiator, the frame and a slot between the radiator and the frame form the slot antenna.

7. The wearable device of claim 6,

the groove is arranged around the connecting part of the cover plate for a circle, and the radiator of the slot antenna is arranged around the groove.

8. The wearable device of claim 1,

the antenna structure includes an inverted-F antenna.

9. The wearable device of claim 1, wherein the antenna structure antenna type comprises at least one of:

10. Wearable device according to claim 1, characterized in that

The wearable device is a smart watch or a smart bracelet.