CN111342229A - Rear shell and electronic equipment - Google Patents

Abstract

The present invention relates to a rear case and an electronic apparatus, the rear case including: the rear shell is provided with a bottom plate, and after the rear shell is connected with the display screen, the bottom plate is opposite to the display screen at intervals; a metal mesh antenna disposed on the bottom plate for communicating with the outside. In the invention, the metal grid antenna is the antenna of the electronic equipment, and the metal grid antenna is a part of the rear shell and is arranged on the bottom plate, so that even if the area of the metal grid antenna is increased, the interference on other components of the electronic equipment can be avoided, and the adverse effect on the miniaturization design of the electronic equipment can be reduced. The electronic equipment can be provided with the antenna with a larger area by adopting the setting mode provided by the implementation, so that the communication effect of the electronic equipment can be improved. Meanwhile, the antenna is designed by adopting a metal grid antenna, so that the antenna can be hidden, and the appearance of the electronic equipment is prevented from being poor.

Description

Back shell and electronic equipment

technical field

The present invention relates to the technical field of antennas, in particular to a rear case and an electronic device.

Background technique

The antenna is an important component used for sending and receiving signals in electronic devices such as mobile phones. In existing mobile phones, the antenna is usually arranged on a circuit board inside the mobile phone. In the upcoming 5G era, the requirements for the antenna area are getting larger and larger, which will occupy the space of other components on the circuit board. In order to avoid the antenna interfering with the settings of other components, a larger circuit board is required. As a support, this is not conducive to the miniaturized design of the mobile phone.

SUMMARY OF THE INVENTION

Based on this, it is necessary to provide a rear case and an electronic device in order to solve the problem that the increase of the antenna area is not conducive to the miniaturization design of the electronic device.

A back case is used for connecting with a display screen to form a accommodating space, the back case comprises: a bottom plate, after the back cover is connected with the display screen, the bottom plate is opposite to the display screen at an interval, The bottom plate has a first surface away from the display screen and a second surface close to the display screen, the bottom plate is provided with through holes; the metal grid antenna is arranged on the first surface, and the The feeder is arranged on the second surface; the feeder runs through the through hole, and one end of the feeder is electrically connected to the metal mesh antenna, and the other end of the feeder is connected to the The feed point is electrically connected. In the present invention, the metal mesh antenna is the antenna of the electronic device, and the metal mesh antenna is a part of the rear casing and is arranged on the bottom plate, so even if the area of the metal mesh antenna increases, it will not affect the electronic device. The interference of other components can reduce the adverse effects on the miniaturized design of electronic equipment. That is, by using the arrangement provided by this embodiment, the electronic device can have an antenna with a larger area, so that the communication effect of the electronic device can be improved. At the same time, the antenna is designed with a metal mesh antenna, which can hide the antenna and avoid bad appearance of the electronic device. In addition, the setting of feed points and feed lines can also make the operation of downstream manufacturers easier and more convenient when assembling electronic equipment.

Further, the bottom plate is provided with grooves, and the grid lines of the metal grid antenna are embedded in the grooves, so that the metal grid antenna can be better protected, and the metal grid antenna can be better protected. At the same time, this setting can also reduce the thickness of the entire decorative panel to a certain extent.

Further, the side wall of the through hole is provided with a first wiring groove, the first wiring groove extends from the first surface to the second surface, and in the length direction of the feeder, the feeder It includes a first conductive part, a second conductive part and a third conductive part connected in sequence, wherein the first conductive part is electrically connected with the metal mesh antenna, and the second conductive part is arranged on the first conductive part. In a wire slot, the third conductive portion is electrically connected to the feed point. This can prevent the feeder from interfering with the installation of the protection plate, and at the same time, it can also prevent the protection plate from crushing and damaging the feeder, which can effectively reduce the probability of the feeder being scratched by foreign objects.

Further, the first surface is provided with a second wiring slot, the second wiring slot is communicated with the through hole, and the first conductive portion is arranged in the second wiring slot. This can prevent the feeder from interfering with the installation of the protection plate, and can also effectively reduce the probability of the feeder being scratched by foreign objects.

Further, the second surface is provided with a third wiring slot, the third wiring slot is communicated with the through hole, and the third conductive portion is arranged in the third wiring slot, which can effectively Reduce the probability of the feeder being scratched by foreign objects.

Further, the rear case further includes a protective layer, and the protective layer is disposed on the surface of the metal grid antenna away from the second surface, so that the metal grid antenna can be prevented from being scratched by foreign objects, and the metal grid can be improved. service life of the antenna.

Further, the rear case further includes a bearing layer, and the metal mesh antenna is formed on the bearing layer; the bearing layer is connected to the bottom plate, wherein the bearing layer is located on the metal mesh antenna and the bottom plate, or the metal mesh antenna is located between the carrier layer and the bottom plate.

An electronic device, comprising: a display screen; a rear shell, which is arranged opposite to the display screen, and the rear shell is as described in any one of the above.

Further, the electronic device further includes a camera module, which is arranged between the display screen and the rear case, and the display surface of the camera module is opposite to the through hole, so as to receive the camera module from the through hole. The incoming light is imaged.

Further, the electronic device further includes a fingerprint identification module, and between the display screen and the rear case, the sensing surface of the fingerprint identification module is opposite to the through hole, and the through hole is the fingerprint at this time. Holes, which can reduce the number of openings on the rear case, reduce the production cost, and make the electronic device more beautiful.

Description of drawings

1 is a schematic cross-sectional view of an electronic device according to an embodiment of the present invention;

2 is a schematic front view of a rear case of an electronic device according to an embodiment of the present invention;

3 is a partial cross-sectional schematic diagram of a rear case of an electronic device according to an embodiment of the present invention;

4 is a partial cross-sectional schematic diagram of a bottom plate of an electronic device according to an embodiment of the present invention;

5 is a partial cross-sectional schematic diagram of a rear case of an electronic device according to another embodiment of the present invention;

FIG. 6 is a schematic front view of a rear case of an electronic device according to another embodiment of the present invention.

Detailed ways

In order to make the above objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific implementation disclosed below.

It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention.

As shown in FIG. 1 , the electronic device 100 includes a display screen 10 , a rear case 20 and a camera module 30 . Wherein, the display screen 10 and the rear case 20 are connected to form an accommodating space 40 , and the camera module 30 is arranged in the accommodating space 40 . The electronic device 100 may be a terminal product such as a mobile phone and a tablet computer.

As shown in FIG. 1 , the rear case 20 includes a bottom plate 1 and a side plate 2 , wherein the side plate 2 is connected to the bottom plate 1 and surrounds the bottom plate 1 to form a receiving cavity with one end open. In this embodiment, the bottom plate 1 has a first surface 11 and a second surface 12 arranged opposite to each other, and the display screen 10 is disposed on one side of the second surface 12 of the bottom plate 1 and is connected to the side plate 2 . Wherein, the display screen 10 is opposite to the bottom plate 1 at an interval, and covers the opening of the receiving cavity to form the receiving space 40 .

In this embodiment, the bottom plate 1 and the side plate 2 are integrally formed, which can make the production of the rear case more convenient. Of course, in some embodiments, the bottom plate 1 and the side plate 2 are provided separately, and then assembled together by means of gluing or the like.

In addition, as shown in FIG. 1 , in this embodiment, the bottom plate 1 is provided with a through hole 13 , and the through hole 13 penetrates from the first surface 11 of the bottom plate 1 to the second surface 12 of the bottom plate 1 . The light incident surface 301 of the camera module 30 is opposite to the through hole 13 to receive the light incoming from the through hole 13 for imaging. That is, in this embodiment, the through hole 13 is the camera hole 201 of the electronic device 100 . It can be understood that, at this time, the electronic device 100 further includes a protection plate 50, and the protection plate 50 may be a transparent plate such as a glass plate, a resin plate, or the like. The protection plate 50 is disposed on the bottom plate 1 to cover the through hole 13 to prevent dust and the like from entering the accommodating space 40 from the through hole 13 .

As shown in FIG. 2 , in this embodiment, the rear case 20 further includes a metal mesh antenna 3 , and the metal mesh antenna 3 is used to communicate with the outside, thereby realizing the communication between the electronic device 100 and the outside, that is, the metal mesh antenna 3 is the antenna of the electronic device 100 . In this embodiment, the metal mesh antenna 3 is a part of the rear case 20 and is disposed on the bottom plate 1 , so even if the area of the metal mesh antenna 3 is increased, it will not cause any damage to other components of the electronic device 100 . The interference can reduce the adverse effect on the miniaturized design of the electronic device 100 . That is, the electronic device 100 can have an antenna with a larger area by using the arrangement provided by this embodiment, so that the communication effect of the electronic device 100 can be improved.

In this embodiment, the material of the metal mesh antenna 3 may be copper, silver, aluminum, etc., and the mesh of the metal mesh antenna 3 may be square. Of course, in other embodiments, the meshes of the metal mesh antenna 3 may also be rhombus, regular hexagon, or the like. In this embodiment, the metal mesh antenna 3 constitutes a transparent antenna, which can prevent the metal mesh antenna from adversely affecting the appearance of the rear case. The thickness of the metal mesh antenna 3 is between 0.5um and 5um, wherein the thickness of the metal mesh antenna 3 refers to the size of the metal mesh antenna 3 in the axial direction of its mesh.

In this embodiment, the mesh holes of the metal mesh antenna 3 are surrounded by a plurality of mesh lines. When the mesh holes are square, there are four mesh lines around each mesh hole. In order to improve the light transmittance of the metal grid antenna, the line width of the grid lines is usually between 1um-10unm, and the length of each grid line is between 50um-500um.

As shown in FIG. 3 and FIG. 4 , in this embodiment, grooves 14 are provided on the first surface 11 of the base plate 1 , and the grid lines 31 of the metal mesh antenna 3 are embedded in the grooves 14 , which can reduce the The thickness of the entire bottom plate 1 is reduced, thereby reducing the thickness of the electronic device in the direction from the display screen 10 to the rear shell 20. At the same time, this setting can also protect the metal grid antenna 3 and reduce the scratching effect of the metal grid antenna 3. probability.

In this embodiment, the groove 14 may be formed on the base plate 1 by laser cutting or etching, and the shape and size of the groove 14 match those of the metal mesh antenna 3 . In addition, in order to make the metal grid antenna 3 more firmly installed on the base plate 1, as shown in FIG. 4, in the direction from the bottom of the groove 14 to the opening of the groove 14, the width of the groove 14 gradually decreases, At this time, the cross section of the groove 14 may be V-shaped, trapezoidal, or the like. After the metal mesh antenna 3 is prepared, the mesh lines 31 of the metal mesh antenna 3 can abut against the side wall of the groove 14 , and this arrangement can effectively prevent the metal mesh antenna 3 from falling off from the groove 14 .

It can be understood that, in some embodiments, the metal mesh antenna 3 can also be directly formed on the first surface 11 of the base plate 1, for example, it can be firstly formed on the first surface 11 of the base plate 1 by electroplating, vapor deposition, etc. A layer of metal layer is provided, and then the redundant metal layer is removed by processes such as exposure, development, etching, etc. to form the metal mesh antenna 3 . Of course, in other embodiments, the metal mesh antenna 3 may also be disposed on the first surface 11 of the base plate 1 by means of nano-imprinting or the like.

As shown in FIG. 3 , in this embodiment, the rear case 20 further includes a feed line 4 and a feed point 5 . Wherein, the metal mesh antenna 3 is arranged on the first surface 11 of the base plate 1, that is, the metal mesh antenna 3 is arranged on the surface of the base plate 1 opposite to the display screen 10, so that the shielding of the metal mesh antenna can be reduced and the metal mesh can be improved. Communication effect of grid antenna. The feed point 5 is arranged on the second surface 12 of the base plate 1 , and the feed line 4 is used to electrically connect the metal mesh antenna 3 and the feed point 5 together. The feed line 4 passes through the through hole 13 , one end of the feed line 4 is electrically connected to the metal mesh antenna 3 , and the other end is electrically connected to the feed point 5 .

As shown in FIG. 3 , in this embodiment, in the longitudinal direction of the feeder 4 , the feeder 4 includes a first conductive portion 41 , a second conductive portion 42 and a third conductive portion 43 connected in sequence, wherein the second conductive portion 43 The part 42 is located inside the through hole 13 , the first conductive part 41 and the third conductive part 43 are located outside the through hole 13 , the first conductive part 41 is electrically connected to the metal mesh antenna 3 , and the third conductive part 43 is connected to the feed point 5 Electrical connection.

When the electronic device 100 is assembled, the feed point 5 can be electrically connected to the circuit board or the like inside the electronic device 100 through conductive wires, so that the electronic device 100 can communicate with the outside through the metal mesh antenna 3 . The feed line 4 may be copper wire, aluminum wire, silver wire, etc., and the feed point 5 may also be metal pins such as copper or aluminum.

As shown in FIG. 3 and FIG. 4 , in this embodiment, the side wall of the through hole 13 is provided with a first wiring slot 15 , and the first wiring slot 15 extends from the first surface 11 to the second surface 12 , and the feeder 4 The second conductive portion 42 is disposed in the first wiring slot 15, so as to avoid interference of the feeder 4 with the installation of the protection board 50, and also to prevent the protection board 50 from crushing and damaging the feeder 4. Meanwhile, in this embodiment, the first surface 11 is provided with a second wiring slot 16, the second wiring slot 16 communicates with the first wiring slot 15, and the first conductive portion 41 of the feeder 4 is arranged on the second wiring slot 15. In this way, the probability of the first conductive portion of the feeder 4 being scratched by foreign objects can be effectively reduced. The second surface 12 is provided with a third wiring slot 17, the third wiring slot 17 communicates with the first wiring slot 15, and the third conductive portion 43 of the feeder 4 is arranged in the third wiring slot 17, which can also effectively The probability that the third conductive portion of the feeder 4 is scratched by foreign objects is reduced. In this embodiment, the second wiring slot 16 extends to the metal mesh antenna 3, and the third wiring slot 17 extends to the feed point 5, so that the feeder 4 can follow the second wiring slot 16, the first The wiring slot 15 and the third wiring slot 17 are arranged from the metal mesh antenna 3 to the feed point 5 . It can be understood that, in some embodiments, only any one or both of the first wiring slot 15 , the second wiring slot 16 and the third wiring slot 17 may be provided, so that the feeder 4 play a certain protective role.

In addition, as shown in FIG. 3 , the rear case 20 further includes a protective layer 6 , and the protective layer 6 is disposed on the surface of the metal mesh antenna 3 away from the second surface 12 . The metal mesh antenna 3 can be protected by the protective layer 6 to prevent the metal mesh antenna 3 from being scratched. In addition, in this embodiment, the protective layer 6 covers the entire first surface 11 , that is, the bottom plate 1 is protected by the protective layer 6 to prevent the bottom plate 1 from being scratched.

It can be understood that, in some embodiments, the metal mesh antenna 3 may not be directly prepared with the base plate 1. In this case, the mesh antenna 3 may be prepared separately and then disposed on the base plate 1 by means of bonding or the like. As shown in FIG. 5 , at this time, the rear case further includes a carrier layer 7 , and the metal mesh antenna 3 is formed on the carrier layer 7 to form an antenna unit. In use, the surface of the carrier layer 7 away from the metal mesh antenna 3 can be bonded to the base plate 1 by bonding or the like. At this time, the support layer 7 is located between the metal mesh antenna 3 and the base plate 1 . Alternatively, the surface of the carrier layer 7 close to the metal grid antenna 3 is bonded to the base plate 1. At this time, the metal grid antenna 3 is located between the carrier layer 7 and the base plate 1, so that the metal grid can be connected to the metal grid through the carrier layer 7. The antenna 3 is protected to prevent the metal grid antenna 3 from being scratched and corroded. It can be understood that, at this time, the protective layer 6 may not be provided on the rear case 20 . In addition, in this embodiment, the carrier layer 7 may be a transparent film layer to reduce adverse effects on the appearance of the electronic device 100 . At this time, the carrier layer 7 can be made of materials such as glass and resin.

In addition, in some embodiments, only the metal mesh antenna 3 may be provided on the rear case 20, that is, the feed line 4 and the feed point 5 are not provided on the rear case 20. During assembly, the metal mesh antenna 3 may be directly connected to the metal mesh antenna 3 through conductive wires. It is directly and electrically connected to a circuit board or the like inside the electronic device 100 .

In addition, in some embodiments, the through holes 13 may also be other functional holes of the electronic device 100 . For example, as shown in FIG. 1 and FIG. 6 , at this time, the electronic device 100 further includes a fingerprint identification module 60 . The fingerprint identification module 60 is arranged between the display screen 10 and the rear case 20 , and the sensing surface of the fingerprint identification module 60 is connected to the The through holes 13 are opposite to each other so that the user can touch the sensing surface of the fingerprint identification module 60 , that is, the through holes 13 are the fingerprint holes 202 disposed on the rear case 20 at this time.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can also be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims (10)

1. A rear case for interfacing with a display screen to form an accommodating space therearound, comprising:

the back shell is connected with the display screen, the bottom plate is opposite to the display screen at intervals, the bottom plate is provided with a first surface far away from the display screen and a second surface close to the display screen, and the bottom plate is provided with a through hole;

a metal mesh antenna disposed on the first surface for communicating with an outside;

the feed point is arranged on the second surface;

and the feeder line penetrates through the through hole, one end of the feeder line is electrically connected with the metal grid antenna, and the other end of the feeder line is electrically connected with the feed point.

2. The rear housing as claimed in claim 1, wherein the first surface is provided with a groove, and the grid lines of the metal grid antenna are embedded in the groove.

3. The rear housing of claim 1, wherein the through-hole sidewall is provided with a first routing channel extending from the first surface to the second surface;

in the length direction of the feeder line, the feeder line comprises a first conductive part, a second conductive part and a third conductive part which are sequentially connected, wherein the first conductive part is electrically connected with the metal grid antenna, the second conductive part is arranged in the first wiring groove, and the third conductive part is electrically connected with the feed point.

4. The rear housing of claim 3, wherein the first surface is provided with a second wiring channel, the second wiring channel being in communication with the first wiring channel, the first conductive portion being disposed within the second wiring channel.

5. The rear housing of claim 3, wherein the second surface is provided with a third wiring channel, the third wiring channel being in communication with the first wiring channel, the third conductive portion being disposed within the third wiring channel.

6. The back cover of claim 1, further comprising a protective layer disposed on a surface of the metal mesh antenna remote from the second surface.

7. The rear housing of claim 1, further comprising a carrier layer, the metal mesh antenna being molded over the carrier layer;

the bearing layer is connected with the bottom plate, wherein the bearing layer is positioned between the metal grid antenna and the bottom plate, or the metal grid antenna is positioned between the bearing layer and the bottom plate.

8. An electronic device, comprising:

a display screen;

a rear housing disposed opposite the display screen, the rear housing as recited in any of claims 1-7.

9. The electronic device of claim 8, further comprising a camera module disposed between the display screen and the rear housing, wherein a display surface of the camera module is opposite to the through hole to receive light rays incident from the through hole for imaging.

10. The electronic device of claim 8, further comprising a fingerprint recognition module, wherein the sensing surface of the fingerprint recognition module is opposite to the through hole between the display screen and the rear housing.

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