CN110459860B

CN110459860B - Rear shell assembly and electronic equipment

Info

Publication number: CN110459860B
Application number: CN201910623483.3A
Authority: CN
Inventors: 彭致勇
Original assignee: Realme Chongqing Mobile Communications Co Ltd
Current assignee: Realme Chongqing Mobile Communications Co Ltd
Priority date: 2019-06-29
Filing date: 2019-06-29
Publication date: 2021-09-14
Anticipated expiration: 2039-06-29
Also published as: CN110459860A

Abstract

The application provides a rear shell assembly and an electronic device, wherein the rear shell assembly comprises a non-metal rear shell and an antenna wire arranged on the non-metal rear shell; the nonmetal rear shell comprises a body and a frame wound on the body, the frame is bent relative to the body, and the frame comprises a first frame and a second frame which are adjacent; the antenna routing comprises three branches respectively covering different preset frequency bands, and the tail ends of at least two branches are respectively arranged on the first frame and the second frame. The application provides a backshell subassembly and electronic equipment through arranging the antenna line at adjacent first frame and second frame, can avoid the user to all antennas all sheltered from the situation when holding electronic equipment, can guarantee to hold good antenna performance under the state.

Description

Rear shell assembly and electronic equipment

Technical Field

The application relates to the technical field of antennas, in particular to a rear shell assembly and electronic equipment.

Background

With the development of wireless communication technology, the size of the mobile phone antenna is smaller and smaller, and the form of the antenna is gradually changed from an external antenna to an internal antenna. However, the antenna is a radio frequency component which is severely influenced by the peripheral environment, for example, the antenna is influenced by metal devices inside the mobile phone and electronic components on the main board. Meanwhile, when the mobile phone is held, the antenna is shielded, so that the radiation performance of the antenna is affected, and the radiation performance of the antenna is reduced. Therefore, how to arrange the antenna in the limited space of the mobile phone to ensure better antenna performance is a research hotspot of those skilled in the art.

Disclosure of Invention

In view of the above problems, embodiments of the present invention provide a rear housing assembly and an electronic device, which can ensure good antenna performance in a hand-held state.

The embodiment of the application provides a rear shell assembly which is applied to electronic equipment and comprises a non-metal rear shell and an antenna wire arranged on the non-metal rear shell; the nonmetal rear shell comprises a body and a frame wound on the body, wherein the frame is bent relative to the body and comprises a first frame and a second frame which are adjacent; the antenna routing comprises three branches respectively covering different preset frequency bands, and the tail ends of at least two branches are respectively arranged on the first frame and the second frame.

In some embodiments, the branches include a first feeding branch and a second feeding branch connected to each other, the first feeding branch includes a first ground end and a feeding end, and the feeding end of the first feeding branch is connected to the second feeding branch.

In some embodiments, the end of the first feeding branch is disposed on the first frame, and the end of the second feeding branch is disposed on the second frame.

In some embodiments, the branches further include a parasitic branch, and the parasitic branch is spaced apart from the second feeding branch and coupled to the first feeding branch and the second feeding branch.

In some embodiments, the ends of the first and second feeding branches are disposed on the first frame, and the ends of the parasitic branch are disposed on the second frame.

In some embodiments, the first ground terminal is provided with a switching network, and the first feeding branch covers a first preset frequency band according to a state of the switching network.

In some embodiments, the switching network includes a switch unit and a plurality of matching units, the switch unit is connected to the first ground terminal, and the plurality of matching modules are connected in parallel to each other and used for connecting the ground plate; the switch unit is used for selecting at least one of the matching units to be conducted so as to control the first feeding branch to cover the first preset frequency band through the matching unit.

In some embodiments, the switch unit includes a single-pole four-throw switch, an input terminal of the single-pole four-throw switch is connected to the first ground terminal, and an output terminal of the single-pole four-throw switch is selectively connected to the plurality of matching units.

In some embodiments, the switch unit includes a single-pole double-throw switch, an input terminal of the single-pole double-throw switch is connected to the first ground terminal, and an output terminal of the single-pole double-throw switch is selectively connected to the plurality of matching units.

In some embodiments, the plurality of matching units include a plurality of inductors connected in parallel and having different inductance values; alternatively, the plurality of matching units include a plurality of capacitors connected in parallel and having different capacitance values.

In some embodiments, the frame is provided with a functional hole, the antenna trace is provided with an extension part which is arranged on the frame and is positioned at two sides of the functional hole, and a crossing part corresponding to the functional hole and positioned on the body; the spanning part is connected with the extending part.

The present application also provides an electronic device comprising a back shell assembly as claimed in any one of the preceding claims.

In some embodiments, the frame is provided with a functional hole, the electronic device further includes an electronic device disposed opposite to the functional hole, and the electronic device is grounded and spaced from the antenna trace.

In some embodiments, the antenna trace has an extension portion disposed on the frame and located at two sides of the functional hole, and a crossing portion corresponding to the functional hole and located on the body; the spanning part is connected with the extending part.

The embodiment of the application provides a backshell subassembly and electronic equipment, including nonmetal backshell and locate the antenna of nonmetal backshell and walk the line to set up the end of two at least minor matters in the three minor matters of antenna line respectively on nonmetal backshell adjacent first frame and second frame. Because a user usually holds two opposite sides of the electronic device when the user normally uses the electronic device, and cannot simultaneously hold two adjacent side faces of the electronic device, at least one branch arranged on the adjacent first frame and the second frame cannot be influenced when the user holds the mobile phone, so that at least one preset frequency band keeps good radiation performance, and good antenna performance is guaranteed in a hand-held state.

These and other aspects of the present application will be more readily apparent from the following description of the embodiments.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that are needed to be used in the description of the present application will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a rear housing assembly according to an embodiment of the present application.

Fig. 2 is an enlarged schematic view of region a of the rear housing assembly shown in fig. 1.

Fig. 3 is a schematic structural diagram of an antenna trace of the rear housing assembly shown in fig. 1.

Fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Fig. 5 is a schematic structural diagram of a rear case assembly and an electronic device of the electronic apparatus shown in fig. 4.

Fig. 6 is an enlarged view of the rear housing assembly shown in fig. 5 and region B of the electronic device.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and are only for the purpose of explaining the present application and are not to be construed as limiting the present application.

With the development of wireless communication technology, the size of the mobile phone antenna is smaller and smaller, and the form of the antenna is gradually changed from an external antenna to an internal antenna. However, the antenna is a radio frequency component which is severely affected by the peripheral environment, such as metal devices inside the mobile phone and electronic components on the main board. Meanwhile, when holding the mobile phone, the antenna is shielded to influence the radiation performance of the antenna, thereby reducing the performance of the antenna.

In order to solve the above problems, the inventors have made long-term studies and propose a back shell assembly and an electronic device in the embodiments of the present application. The tail ends of at least two branches of the three branches of the antenna wiring are respectively arranged on the first frame and the second frame which are adjacent to each other on the nonmetal rear shell. Because a user usually holds two opposite sides of the electronic device when the user normally uses the electronic device, but does not hold two adjacent sides of the electronic device at the same time, at least one branch arranged on the adjacent first frame and the second frame is not influenced when the user holds the mobile phone, so that at least one preset frequency band keeps good performance, and the antenna performance in a hand-held state is ensured.

In order to make the technical solutions of the present application better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1, fig. 1 schematically illustrates a rear case assembly 100, which is applied to an electronic device 100. The electronic device includes, but is not limited to, terminal devices such as a smart phone, a tablet computer, a smart band, and a smart watch. In this embodiment, the electronic device is described by taking a smart phone as an example. The back shell assembly 100 comprises a non-metallic back shell 10 and an antenna trace 20, wherein the antenna trace 20 is disposed on the non-metallic back shell 10. In the present embodiment, the material of the non-metal back shell 10 may include, but is not limited to, plastic, glass, ceramic, and composite plate. The antenna trace 20 may be attached to the non-metal rear case 10 by an insert molding process or a Laser-Direct-structuring (LDS) technique.

The non-metal back shell 10 includes a body 11 and a frame 12 wound around the body 11. The body 11 is substantially rectangular plate-like in shape, and the frame 12 is wound around the periphery of the body 11 and bent with respect to the body 11. The main body 11 and the frame 12 together form an accommodating space for accommodating a circuit board and other electronic devices (e.g., a receiver, a USB interface, an audio interface, a battery, a camera module, etc. of an electronic device). The circuit board can be provided with radio frequency circuits and other functional devices. Because the metal has a shielding or interference effect on the antenna, the antenna trace 20 disposed on the non-metal rear shell 10 is farther away from the circuit board and the electronic device in the accommodating space than the conventional antenna, so that the interference of the circuit board and the electronic device in the accommodating space on the antenna trace 20 is reduced.

In the present embodiment, the frame 12 is a substantially rectangular frame and includes four sub-frames. The four sub-frames are a first frame 121, a second frame 122, a third frame 123 and a fourth frame 124. The first frame 121 and the third frame 123 are disposed oppositely, and the second frame 122 and the fourth frame 124 are disposed oppositely; that is, the first frame 121, the second frame 122, the third frame 123 and the fourth frame 124 are sequentially and adjacently connected to form a rectangular frame. In this embodiment, when the electronic device applied to the rear housing assembly 100 is normally used by a user, that is, when the display screen of the electronic device normally faces the user, the first frame 121 is defined as a left sub-frame and the second frame 122 is defined as a bottom sub-frame with reference to the orientation of the user, and accordingly, since the third frame 123 is disposed opposite to the first frame 121 and the fourth frame 124 is disposed opposite to the second frame 122, the third frame 123 is a right sub-frame and the fourth frame 124 is a top sub-frame at this time. It is understood that the lengths of the first frame 121 and the third frame 123 are larger than the lengths of the second frame 122 and the fourth frame 124. The above definitions relate only to the positional relationships of the first frame 121, the second frame 122, the third frame 123, and the fourth frame 124, and do not specifically limit the specific structures of the frames. It is understood that in some embodiments, the position relationship of the first frame 121, the second frame 122, the third frame 123 and the fourth frame 124 may have other definitions.

Further, referring to fig. 1 and fig. 2, the antenna trace 20 extends along the frame 12, that is, the antenna trace 20 is disposed on the frame 12. The frame 12 is opened with a function hole 13, and the function hole 13 may include, but is not limited to, an earphone socket preformed hole, a USB socket preformed hole, and a speaker preformed hole. Further, the antenna trace 20 has an extending portion and a crossing portion, the extending portion is disposed on the frame 12, the crossing portion is disposed on the body 11, and a projection position of the crossing portion on the frame 12 corresponds to a position of the functional hole 13, that is, the antenna trace 20 has extending portions disposed on the frame 12 and located on two sides of the functional hole 13, and the crossing portion is located on the crossing portion of the body 11 corresponding to the functional hole 13, and the crossing portion is connected to the extending portions to present a shape of crossing the functional hole 13. Specifically, the antenna trace 20 extends to the functional hole 13 on the frame 12 and crosses the functional hole 13 from the body 11 according to the overall arrangement of the antenna trace 20. Because the antenna trace 20 is disposed along the frame 12 and the functional hole 13 formed in the frame 12 cuts the extension of the antenna trace 20, when the antenna trace 20 extends to the functional hole 13, the antenna trace 20 extends toward the body 11 until it crosses the functional hole 13, and then extends along the frame 12 again.

In the present embodiment, the functional holes 13 are formed in the second frame 122 based on the definition of the positional relationship between the first frame 121 and the second frame 122. In some embodiments, the functional holes 13 may also be opened in any one or more of the first frame 121, the second frame 122, the third frame 123, and the fourth frame 124.

In this embodiment, the antenna trace 20 is a Flexible Printed Circuit (FPC) antenna. In some embodiments, the antenna trace 20 may be an LDS antenna. The antenna trace 20 includes three branches, and the three branches cover different preset frequency bands, so that the antenna trace 20 receives and transmits Long Term Evolution (LTE) signals. The LTE signal is an LTE signal transmitted based on UMTS (Universal Mobile Telecommunications System) technical standard established by 3GPP (The 3rd Generation Partnership Project) organization, and is used for accessing a wireless communication network to implement wireless communication. LTE signals can be classified into Low Band (LB), Medium Band (MB), and High Band (HB). Wherein LB comprises a frequency range of 700MHz to 960MHz, MB comprises a frequency range of 1710MHz to 2170MHz, and HB comprises a frequency range of 2300MHz to 2690 MHz.

Referring to fig. 3, the three branches of the antenna trace 20 include a first feeding branch 21, a second feeding branch 22, and a parasitic branch 23.

The first feeding branch 21 is used for covering a first preset frequency band, the second feeding branch 22 is used for covering a second preset frequency band, and the parasitic branch 23 is used for covering a third preset frequency band. The first feed branch 21 includes a feed end 211, a first ground end 212, and an end. The feeding end 211 has a feeding point, the feeding point can be connected to a feeding source on the circuit board through the feeding line, and the feeding source feeds current to the feeding point through the feeding line, so that the first feeding branch 21 resonates within the first preset frequency band. The first ground terminal 212 has a first ground point, and the first ground point is connected to the ground plate through a ground line. In this embodiment, the ground plate may be a metal sheet disposed on the circuit board, and the feeder line and the ground line may be elastic pieces.

The second feeding branch 22 is connected to the feeding end 211 of the first feeding branch 21, in other words, the second feeding branch 22 and the first feeding branch 21 are connected to the feeding source through the same feeding point, so that the second feeding branch 22 resonates within the second preset frequency band. Since the second feeding branch 22 is connected to the first feeding branch 21, it can be understood that the second feeding branch 22 can not only share the same feeding point with the first feeding branch 21, but also the second feeding branch 22 can share the same grounding point with the first feeding branch 21. In other words, the second feeding branch 22 and the first feeding branch 21 are connected to the ground plate through the first grounding point at the same time. Of course, in some embodiments, the second feeding branch 22 and the first feeding branch 21 may also be connected to the ground plate through different grounding points. Further, the second feed stub 22 also includes a terminal.

The parasitic branch 23 is spaced apart from the first feeding branch 21 and the second feeding branch 22, the parasitic branch 23 includes a second ground terminal 231 and a terminal, the second ground terminal 231 has a second ground point, and the second ground point is also connected to the ground plate through the ground line. In this embodiment, the first grounding point and the second grounding point can be connected to the same grounding plate, so as to save cost. It will be appreciated that in some embodiments, the first ground point and the second ground point may each engage a different ground plate, and are not particularly limited herein. The parasitic branch 23 generates secondary radiation through the coupling effect of the first feeding branch 21 or the second feeding branch 22, and further resonates in a third preset frequency band. By setting three branches resonating in different preset frequency bands, the antenna wire 20 can work in three different frequency bands, and the communication performance of the electronic equipment using the antenna wire 20 is improved.

It should be noted that the branch of the antenna trace 20 not only has two ends, for example, when the branch is a feeding branch, the feeding branch usually includes a feeding end having a feeding point, a grounding end having a grounding point, and a free end where resonance occurs. In this application, the free end where resonance occurs is called the tip. Generally speaking, the tail end of the stub is the position farthest from the feed point, the radiation intensity of the position is the largest, and resonance occurs at the position so that the stub can cover the preset frequency band. For example, the end of the first feeding branch is the position a farthest from the feeding end 211; the tail end of the second feeding branch is a position b farthest from the feeding end 211; the end of the parasitic stub is at a position c farthest from the feeding end 211.

Further, referring to fig. 1 to fig. 3, in the first feeding branch 21, the second feeding branch 22 and the parasitic branch 23, the ends of at least two branches are respectively disposed on two adjacent sub-frames, for example, the first frame 121 and the second frame 122. Based on the above definition of the positions of the first frame 121 and the second frame 122, in the embodiment, the end of the first feeding branch 21 is disposed on the first frame 121, and the end of the second feeding branch 22 is disposed on the second frame 122. Meanwhile, in order to reduce mutual interference between the branches, the ends of the parasitic branch 23 are located as far away from the first feeding branch 21 and the second feeding branch 22 as possible, and thus, the ends of the parasitic branch 23 are disposed at the third frame 123. When a user normally uses the electronic device, the user usually holds two opposite ends of the electronic device (for example, the first frame 121 and the third frame 123; or the second frame 122 and the fourth frame 124) without simultaneously holding two adjacent sides of the electronic device (for example, the first frame 121 and the second frame 122; or the second frame 122 and the third frame 123). Therefore, by arranging the end of the first feeding branch 21 on the first frame 121, the end of the second feeding branch 22 on the second frame 122, and the end of the parasitic branch 23 on the third frame 123, when a user normally uses the electronic device, all three branches of the antenna trace 20 are not shielded at the same time, but at least one branch is not affected, so that the good radiation performance of at least one branch is ensured, the branch can normally work in the preset frequency band, and the communication performance of the electronic device when the user holds the mobile phone is ensured.

Specifically, based on the above definitions of the positions of the first frame 121 and the second frame 122, when the user holds the electronic device vertically (for example, during a call, browsing the content of a mobile phone, etc.), the user holds the first frame 121 and the third frame 123, and at this time, although the ends of the first feeding branch 21 and the parasitic branch 23 are easily shielded to affect the radiation performance of the first feeding branch 21 and the parasitic branch 23, the end of the second feeding branch 22 disposed on the second frame 122 can be unaffected by the user's holding, and the second feeding branch 22 can still normally resonate within the second preset frequency band. When a user transversely holds the mobile phone (for example, playing a game, watching a movie, etc.), the user holds the second frame 122 and the fourth frame 124, at this time, although the end of the second feeding branch 22 is easily shielded, and the radiation performance of the second feeding branch 22 is affected, the end of the first feeding branch 21 disposed on the first frame 121 and the end of the parasitic branch 23 disposed on the third frame 123 can be unaffected by the user's holding, and the first feeding branch 21 and the parasitic branch 23 can still normally resonate within the first preset frequency band and the third preset frequency band. Therefore, no matter how the user holds, at least one branch can be ensured to be capable of normally resonating within the preset frequency band, thereby ensuring the good performance of the antenna wire 20 in the holding state.

In some embodiments, the positions of the first frame 121 and the second frame 122 are not specifically defined. The end of the first feeding branch 21, the end of the second feeding branch 22, and the end of the parasitic branch 23 may be respectively disposed on any three sub-frames of the first frame 121, the second frame 122, the third frame 123, and the fourth frame 124. At this time, the tail ends of two branches are necessarily located on the adjacent sub-frames, and the good performance of the antenna in the holding state can be ensured.

In some embodiments, the positions of the first frame 121 and the second frame 122 are not specifically defined. The ends of two of the first feeding branch 21, the second feeding branch 22 and the parasitic branch 23 are disposed on the same sub-frame, and the ends of the two branches and the end of the other branch disposed on the same sub-frame are disposed on the adjacent sub-frame. For example, the end of the first feeding branch 21 and the end of the second feeding branch 22 may be disposed on the first frame 121, and the end of the parasitic branch 23 may be disposed on the second frame 122. The good performance of the antenna in the holding state can still be ensured at this time.

In this embodiment, the first feeding branch 21 is an inverted F antenna; the second feed branch 22 is a monopole antenna; the parasitic stub 23 is a parasitic antenna. Further, the first preset frequency band covered by the first feeding branch 21 is a low-frequency band with a frequency range of 700MHz to 960 MHz; the second preset frequency band covered by the second feeding branch 22 is a high-frequency band with a frequency range of 2300MHz to 2690 MHz; the third predetermined frequency band covered by the parasitic branch 23 is an intermediate frequency band with a frequency range of 1710MHz to 2170 MHz.

In some embodiments, the first predetermined frequency band, the second predetermined frequency band, and the third predetermined frequency band are not specifically limited. Since the length of a branch is inversely proportional to the preset frequency band of the branch, that is, the longer the length of the branch is, the lower the preset frequency band of the branch is. Therefore, the length dimensions of the first feeding branch 21, the second feeding branch 22 and the parasitic branch 23 can be adjusted, so that the first feeding branch 21, the second feeding branch 22 and the parasitic branch 23 respectively operate in different frequency bands of low, medium and high without changing positions. For example, if the preset frequency band of the first feeding branch 21 originally having the end disposed on the first frame 121 is a low frequency band, the preset frequency band of the second feeding branch 22 originally having the end disposed on the second frame 122 is a high frequency band, and the preset frequency band of the parasitic branch 23 originally having the end disposed on the third frame 123 is an intermediate frequency band, it can be understood that the length relationship of the three branches is as follows: the first feeding branch 21 is larger than the parasitic branch 23 and larger than the second feeding branch 22; at this time, the length of the second feeding branch 22 can be increased or the length of the parasitic branch 23 can be decreased, so that the length relationship of the three branches is changed as follows: the first feeding branch 21 is larger than the second feeding branch 22 and larger than the parasitic branch 23, so that the preset frequency band of the second feeding branch 22, the end of which is disposed on the second frame 122, deviates from the high frequency band to the intermediate frequency band, and the preset frequency band of the parasitic branch 23, the end of which is disposed on the third frame 123, deviates from the intermediate frequency band to the high frequency band.

Referring to fig. 3, in the present embodiment, the first ground end 212 of the first feeding branch 21 is provided with the switching network 24, and the first feeding branch 21 covers the first predetermined frequency band according to the state of the switching network 24. In some embodiments, the first feeding branch 21 operates in different secondary frequency bands of the low frequency band through different states of the switching network 24. The secondary frequency band refers to a plurality of sub-frequency bands included in the low frequency band. For example, in the low frequency band with a frequency range of 700MHz to 960MHz, the secondary frequency band may include, but is not limited to: a low frequency band in the frequency range of 703MHz to 803MHz, a low frequency band in the frequency range of 824MHz to 894MHz, and a low frequency band in the frequency range of 880MHz to 890 MHz.

Further, the switching network 24 comprises a switching unit 241 and a plurality of matching units 242. The switch unit 241 is connected to the first ground terminal 212, the plurality of matching modules are connected in parallel and used for being connected to the ground board, and the switch unit 241 is used for selecting at least one of the plurality of matching units 242 to be turned on, so that the first feeding branch 21 covers the first preset frequency band through the matching unit 242.

Specifically, the switch unit 241 can be selectively and respectively connected to a plurality of different matching units 242, and the different matching units 242 are connected to the switch unit 241, so that the first feeding branch 21 generates different resonant frequencies according to different matching values, and further, the first feeding branch 21 operates in different secondary frequency bands. Because the wavelength corresponding to the low frequency band is long, the low frequency band needs to be covered by the branch with long length and size. The first feeding branch 21 works in different secondary frequency bands through the switching network 24, so that the first feeding branch 21 can cover the low-frequency band with a smaller length, and thus the antenna wire 20 can realize full-frequency-band coverage under the condition of extremely small headroom, the radiation performance of the antenna wire 20 is improved, and the communication performance of the electronic device is enhanced.

In some embodiments, the switching unit 241 may selectively connect a plurality of different matching units 242 at the same time. For example, the switch unit 241 may simultaneously connect the first matching unit 242 and the second matching unit 242 to make the first feeding branch 21 operate in the first secondary frequency band; or, the first matching unit 242 and the third matching unit 242 are connected simultaneously to make the first feeding branch 21 work in the second secondary frequency band; alternatively, the first matching unit 242, the second matching unit 242 and the third matching unit 242 are connected at the same time, so that the first feeding branch 21 operates in the third secondary frequency band. It should be noted that the number of the matching units 242 may be set according to practical situations, and the number may not correspond to the number of the secondary frequency bands to be switched, and is not limited herein.

In this embodiment, the switch unit 241 is a single-pole four-throw switch, an input end of the single-pole four-throw switch is connected to the first ground terminal 212, and an output end of the single-pole four-throw switch is selectively connected to the plurality of matching units 242. Further, the matching units 242 are a plurality of parallel inductors with different inductance values, and the inductors with different values are connected through the single-pole four-throw switch to determine different matching values, so that the first feeding branch 21 generates different resonant frequencies, thereby covering different secondary frequency bands. In some embodiments, the matching units 242 may be a plurality of capacitors with different values connected in parallel, and the first feeding branch 21 generates different resonant frequencies by switching different capacitance values, so as to cover different secondary frequency bands. In some embodiments, the switch unit 241 may also be a single-pole double-throw switch, an input terminal of the single-pole double-throw switch is connected to the first ground terminal 212, and an output terminal of the single-pole double-throw switch may be selectively connected to the plurality of matching units 242. It is understood that the switch unit 241 can be determined according to actual requirements, for example, the switch unit 241 can also be composed of a single-pole double-throw switch and a single-pole four-throw switch; or a plurality of single-pole four-throw switches; or a plurality of single pole double throw switches.

The application provides a backshell subassembly, including nonmetal backshell and locate the antenna of nonmetal backshell and walk the line to set up the end of two at least branches in the three branches of antenna line respectively on nonmetal backshell adjacent first frame and second frame. Because a user usually holds two opposite sides of the electronic device when the user normally uses the electronic device, but does not hold two adjacent sides of the electronic device at the same time, at least one branch arranged on the adjacent first frame and the second frame is not influenced when the user holds the mobile phone, so that at least one preset frequency band keeps good radiation performance, and good antenna performance is ensured in a hand-held state.

Referring to fig. 4, based on the rear housing assembly 100, the present application further provides an electronic device 200, where the electronic device 200 includes a device body 210 and the rear housing assembly 100. Wherein the rear case assembly 100 is connected to the apparatus body 210.

The apparatus main body 210 includes a display panel 211 and a circuit board (not shown). The display panel 211 may be a touch display panel, the display panel 211 is connected to the non-metal rear case 10 to form an accommodating cavity, and the circuit board is disposed in the accommodating cavity. The circuit board is provided with a radio frequency circuit, a feed source, a grounding plate and other functional modules. The display panel 211 is electrically connected to the functional modules of the circuit board to implement the display function of the display panel 211.

Referring to fig. 5 and fig. 6, the frame 12 of the rear housing assembly 100 is formed with a function hole 13, and the function hole 13 may include, but is not limited to, an earphone socket preformed hole, a USB socket preformed hole, and a speaker preformed hole. The device body 210 further includes an electronic device 212 disposed corresponding to the functional hole 13, the electronic device 212 being grounded and disposed spaced apart from the antenna trace 20.

Specifically, the electronics 212 may include, but are not limited to, a headphone jack, a speaker, and a USB jack. The earphone socket and the earphone preformed hole are arranged oppositely, a gap is formed between the earphone socket and the antenna wiring 20, the earphone socket can be connected with a ground plate on the circuit board through magnetic beads, grounding processing of the earphone socket is achieved, and interference of the earphone socket on the antenna wiring 20 is avoided. The speaker is disposed opposite to the speaker prepared hole and a gap is provided between the speaker and the antenna trace 20. Further, the speaker may include a conductive element (not shown in the figure), the device main body 210 further includes a metal inner frame (not shown in the figure) disposed in the accommodating cavity, and the conductive element of the speaker may be connected to the metal inner frame through a spring plate, so as to implement grounding processing of the speaker, and avoid the speaker from interfering with the antenna trace 20. The USB socket is arranged opposite to the reserved hole of the USB socket and a gap is formed between the USB socket and the antenna wire 20, the USB socket comprises 4 grounding pins, and the grounding pins are connected to a grounding plate of the circuit board to realize grounding processing of the USB socket so as to avoid the interference of the USB socket on the antenna wire 20.

The application provides an electronic equipment, including nonmetal backshell and locate the antenna of nonmetal backshell and walk the line to set up the end of two at least branches in the three branches of antenna line respectively on nonmetal backshell adjacent first frame and second frame. Because a user usually holds two opposite sides of the electronic device when the user normally uses the electronic device, but does not hold two adjacent sides of the electronic device at the same time, at least one branch arranged on the adjacent first frame and the second frame is not influenced when the user holds the mobile phone, so that at least one preset frequency band keeps good radiation performance, and good antenna performance is ensured in a hand-held state. Meanwhile, the electronic device in the electronic equipment is isolated from the antenna wiring and is processed in parallel, so that the interference of the electronic device on the antenna wiring is avoided, and the radiation performance of the antenna wiring is further improved.

Although the present application has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A rear shell assembly is applied to electronic equipment and is characterized by comprising a non-metal rear shell and an antenna wire arranged on the non-metal rear shell;

the nonmetal rear shell comprises a body and a frame wound on the body, the frame is bent relative to the body and comprises a first frame and a second frame which are adjacent, wherein the frame is a non-conductive frame;

the antenna routing comprises three branches respectively covering different preset frequency bands, and the tail ends of at least two branches are respectively arranged on the first frame and the second frame, wherein the branches comprise a first feeding branch, a second feeding branch and a parasitic branch, the first feeding branch is connected with the second feeding branch, the parasitic branch is arranged at intervals with the first feeding branch and the second feeding branch, the parasitic branch is coupled with the first feeding branch and the second feeding branch, the tail end of the first feeding branch is arranged on the first frame, and the tail end of the second feeding branch is arranged on the second frame; the tail end of the first feeding branch is far away from the parasitic branch, and the tail end of the parasitic branch is far away from the first feeding branch and the second feeding branch; the first feed branch comprises a first grounding end and a feed end, and the feed end of the first feed branch is connected to the second feed branch; the preset frequency band is a far-field communication frequency band, the preset frequency band at least comprises a low-frequency band and a high-frequency band, the first feed branch is used for radiating the low-frequency band, and the second feed branch is used for radiating the high-frequency band.

2. The back case assembly of claim 1, wherein the first ground is provided with a switching network, and the first feed stub covers the low frequency band according to a state of the switching network.

3. The back case assembly of claim 2, wherein the switching network comprises a switching unit and a plurality of matching units, the switching unit being connected to the first ground terminal, the plurality of matching units being connected in parallel to each other and for connecting a ground board; the switch unit is used for selecting at least one of the matching units to be conducted so as to control the first feeding branch to cover the low-frequency band through the matching unit.

4. The back case assembly of claim 3, wherein the switch unit comprises a single pole four throw switch having an input connected to the first ground and an output selectively connectable to a plurality of the matching units.

5. The back case assembly of claim 3, wherein the switch unit comprises a single pole double throw switch having an input connected to the first ground and an output selectively connectable to a plurality of the matching units.

6. The back case assembly of claim 3, wherein a plurality of the matching units comprise a plurality of inductors connected in parallel with each other and having different inductance values; alternatively, the plurality of matching units include a plurality of capacitors connected in parallel and having different capacitance values.

7. The rear shell assembly according to any one of claims 1 to 6, wherein the frame has a functional hole, the antenna trace has an extension portion disposed on the frame and located at two sides of the functional hole, and a crossing portion corresponding to the functional hole and located on the body; the spanning part is connected to the extending part.

8. An electronic device, characterized in that the electronic device comprises a rear shell assembly according to any one of the claims 1 to 7.

9. The electronic device of claim 8, wherein the frame defines a functional hole, and further comprising an electronic component disposed opposite to the functional hole, the electronic component being grounded and spaced apart from the antenna trace.

10. The electronic device of claim 9, wherein the antenna trace has an extension portion disposed on the frame and located at two sides of the functional hole, and a crossing portion corresponding to the functional hole and located on the body; the spanning part is connected to the extending part.