CN115242910A

CN115242910A - Protective shell

Info

Publication number: CN115242910A
Application number: CN202210822109.8A
Authority: CN
Inventors: 李晨光
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2022-07-12
Filing date: 2022-07-12
Publication date: 2022-10-25

Abstract

The embodiment of the application provides a protective housing for protect electronic equipment, electronic equipment is provided with the SAR sensor, the SAR sensor is in one or more detection area of circumference formation of electronic equipment, the protective housing includes backplate and surrounding edge portion, surrounding edge portion connect in the edge of backplate and with the backplate encloses into the accommodation space that is used for holding electronic equipment, surrounding edge portion is provided with one or more and the detection area corresponds medium portion, the equivalent dielectric constant value of medium portion is less than the dielectric constant value of backplate. Through the dielectric part that corresponds with SAR sensor's detection area setting in the portion of enclosing along for the equivalent dielectric constant value of dielectric part is less than the dielectric constant value of backplate, makes detection area when carrying out user distance detection, and is littleer to SAR sensor's interference, and then reaches better detection result, makes that electronic equipment can be accurate adjust antenna emission power.

Description

Protective shell

Technical Field

The application relates to the field of electronic equipment protection, in particular to a protective shell.

Background

With the development of the existing electronic device technology, in order to meet the requirements of users for communication, network connection, and the like, the electronic device is usually provided with one or more antennas, and these antennas perform radio frequency during the operation process. In order to reduce the influence of the radio frequency of the antenna on the body of the user, the transmission power of the antenna needs to be controlled, for example, when the antenna is close to the human body, the transmission power of the antenna needs to be reduced appropriately, if the distance between the user and the antenna needs to be detected first. In the related art, the method is mainly implemented by a Synthetic Aperture Radar (SAR) sensor.

In order to prevent the electronic device from being damaged in the situations of collision, falling and the like, a user usually installs a protective shell outside the electronic device, and the protective shell is usually reinforced by increasing the thickness of the existing protective shell in order to improve the protection capability of the electronic device. This in turn limits the operation of the sensor, resulting in a large deviation of the detection result.

Disclosure of Invention

The purpose of this application is to provide a protective housing to make the protective housing when having good barrier propterty, can not disturb the work of other sensors.

The embodiment of the application provides a protective housing for protecting electronic equipment, the electronic equipment is provided with an SAR sensor, the SAR sensor forms one or more detection areas in the circumference of the electronic equipment, the protective housing comprises a back plate and a surrounding edge part, the surrounding edge part is connected to the edge of the back plate and encloses an accommodating space for accommodating the electronic equipment with the back plate, the surrounding edge part is provided with one or more medium parts corresponding to the detection areas, and the equivalent dielectric constant value of the medium parts is smaller than that of the back plate.

The application provides a protective housing through the dielectric part that the detection area that sets up with the SAR sensor in the portion of enclosing along corresponds for the equivalent dielectric constant value of dielectric part is less than the dielectric constant value of backplate, makes the detection area when carrying out user distance detection, and is littleer to the interference of SAR sensor, and then reaches better detection effect, makes that electronic equipment can be accurate adjust antenna emission power.

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 needed to be used in the description of the embodiments are briefly introduced 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 an electronic device according to an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a housing assembly in the electronic device shown in FIG. 1;

fig. 3 is a schematic structural diagram of a protective casing according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a media section according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of an operation of a media portion of a protective case provided by an embodiment of the present application;

FIG. 6 is a schematic structural diagram of another media portion provided in an embodiment of the present application;

FIG. 7 is a schematic structural diagram of another media section provided in an embodiment of the present application;

FIG. 8 is a schematic structural diagram of another media portion provided in an embodiment of the present application;

FIG. 9 is a schematic structural diagram of yet another media portion provided in an embodiment of the present application;

fig. 10 is a schematic structural diagram of another medium portion provided in an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

In the related art, electronic devices such as mobile phones are equipped with antennas, and these antennas are used for implementing radio frequency communication with external devices or networks. Currently, these antennas are typically disposed on the bezel or the back cover of the housing of the electronic device. Radio frequency is carried out in the working process of the antenna, when the radio frequency transmitting power is high, the improvement of the communication effect is facilitated, but when the radio frequency transmitting power is high, adverse effects can be caused to users. Therefore, in the related art, the electronic device is further provided with an SAR sensor for detecting a distance between the body of the user and the electronic device, and when the distance between the body of the user and the electronic device is smaller than or equal to a distance threshold, the transmission power of the antenna is reduced.

As shown in fig. 1, the present embodiment provides an electronic device 10, where the electronic device 10 in the present application may be a mobile phone or a smart phone (e.g., an iPhone-based phone), a Portable game device (e.g., nintendo DS, playStation Portable, game Advance, iPhone), a laptop, a PDA, a Portable internet device, a music player, and a data storage device, other handheld devices, and a head-mounted device (HMD) such as a watch, an earphone, a pendant, an earphone, etc., and the electronic device 10 may also be other wearable devices (e.g., an electronic glasses, an electronic garment, an electronic bracelet, an electronic necklace, an electronic tattoo, the electronic device 10, or a smart watch).

Referring to fig. 1 and fig. 2 together, the present embodiment shows an electronic device 10, which is exemplified by a mobile phone. The electronic device 10 includes a housing assembly 20, a display screen 30, a main board (not shown), a battery (not shown), and the like, which are disposed in the housing assembly 20. The electronic device 10 may also be provided with a front-facing camera disposed on the side of the electronic device 10 on which the display screen 30 is disposed. Referring to fig. 2, the housing includes a middle frame 21, a rear case 26, and a front case 25.

Specifically, the middle frame 21 includes a middle plate 22 and a side frame 23, the side frame 23 is disposed around the middle plate 22, and the side frame is made of plastic or the like. The frame 23 protrudes from the middle plate 22, and the frame 23 protrudes from the middle plate 22 on both sides of the middle plate 22 opposite to each other. The front shell 25 and the rear shell 26 are respectively assembled on two opposite sides of the middle plate 22, and the front shell 25 and the rear shell 26 are fixedly assembled with the frame 23; the rear shell 26, the middle frame 21 and the front shell 25 together form a cavity, the main board 50 is disposed in the cavity and fixed on the middle plate 22, and the cavity may be further provided with various other components such as a rear camera, an antenna, and a processor. The front case 25 and the rear case 26 are mounted on opposite sides of the middle frame 21 and are connected to the rim 23. The rear housing 26 may be provided with a camera mounting hole 27, and the camera mounting hole 27 is used for mounting a rear camera.

In one embodiment, one or more radiators (not shown) are disposed on the bezel 23 for performing radio frequency communications. Meanwhile, the electronic device 10 is also provided with the SAR sensor 40, and the SAR sensor 40 can be arranged at any position of the electronic device, which is not limited herein. The SAR sensor 40 forms one or more detection regions in the circumferential direction of the electronic device, and specifically, the SAR sensor 40 forms one or more detection regions 50 in the bezel. For example, fig. 1 shows an arrangement of the SAR sensor 40, which is provided with a detection area 50 on each frame of the frame 23. Of course, it is understood that in other embodiments, the detection area 50 may be disposed in other ways, and is not limited herein.

The principle of the SAR sensor 40 for user distance detection is: the body tissue is a conductor, and when the body tissue approaches one of the detection regions 50 of the SAR sensor 40, a change in charge distribution is caused to affect a change in electric field between the body tissue and the detection region 50 of the SAR sensor 40. At this time, the human tissue and the SAR sensor may be equivalent to a capacitance. According to a calculation formula of the capacity value:

where d is the distance between the body tissue and the SAR sensor 40, A is the relative area of the body tissue and the detection region 50, ε ₀ ＝1/4πk，ε _r Is the equivalent dielectric constant between the human tissue and the detection region 50.

As can be seen from the above formula, when the human tissue approaches the detection region 50 of the SAR sensor 40, i.e., d decreases, the capacitance C gradually increases. Setting a threshold value (i.e., threshold value) C _limit And is defined when C.gtoreq.C _limit In time, the antennas of the detection area 50 of the SAR sensor 40 trigger a power back-off scenario, reducing the transmission power.

With the rapid development of electronic devices (such as mobile terminals), users usually install a protective case outside the electronic devices to protect the electronic devices in the future. These protectionsThe shell is usually made of materials such as silica gel and plastic, and in the using process, the protective shell comprises the back and the side edges of the electronic equipment. When the electronic device is installed on the protective shell, in the SAR detection process, since the protective shell is located between the human tissue and the detection area 50, epsilon is caused _r Is increased, which results in the same C to be achieved _limit The detection distance d needs to be increased, and the increase of the detection distance can cause the reduction of the antenna power to be untimely, so that the user experience is reduced.

Therefore, the inventors propose a protective case in the embodiment of the present application. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Referring to fig. 3, the present embodiment provides a protective case 100, including a back panel 200 and a surrounding portion 300, wherein the back panel 200 and the surrounding portion 300 are connected and used to be installed on an electronic device 10, such as the electronic device 10 described above.

Backplate 200 conforms to the back surface (back case 26) of the electronic device during use, and thus backplate 200 may be configured to match the configuration of the electronic device. For example: in some embodiments, backplate 200 may be configured in a generally rectangular, rounded rectangular, or other plate-like configuration. Backplate 200 may be made of a hard material such as: the back panel 200 may be made of metal, rigid plastic, ceramic, etc., and the rigid plastic may be PC, PVC, PP, PE, PVDF, TPE, etc. Backplate 200 may also be made of a flexible material, such as silicone, flexible ABS plastic, etc., and is not limited in this regard.

Backplate 200 may be configured to fit within rear housing 26 of electronic device 10, depending on the shape and configuration of the electronic device. A camera exposing hole 210 may be further disposed on the back plate 200 for allowing a camera of the electronic device 10 to extend out.

The surrounding portion 300 is connected to the edge of the backboard 200 and forms an accommodating space 101 with the backboard 200 for accommodating electronic equipment, and the electronic equipment is installed in the accommodating space 101 during use. It is understood that in some embodiments, the surrounding edge portion 300 may be configured to be a shape matching with the electronic device, so that when the electronic device is installed, the inner surface of the surrounding edge portion 300 may perfectly fit with the electronic device, and the electronic device is better protected. When the electronic device is installed, the surrounding edge 300 may fix the electronic device in an interference fit manner, or may be fixed to the electronic device by providing an adhesive on the backplate 200 and the surrounding edge 300.

In order to facilitate the operation of the electronic device, the surrounding portion 300 may be provided with a through hole or a notch, so that the physical key or the touch operation area of the electronic device is exposed. It is understood that the skirt 300 may be formed in a ring shape and connected to the backplate 200 along the edge of the backplate 200. Meanwhile, the surrounding portion 300 may also be configured as a plurality of spaced teeth, that is, a discontinuous surrounding portion 300 is formed, and a gap may be formed between the plurality of spaced teeth for exposing a physical key or a touch operation area of the electronic device. The surrounding edge 300 may be made of the same material as the backplate 200, and may be integrally formed with the backplate 200 by injection molding, or may be fixed to the backplate 200 by bonding, clamping, or the like.

In some embodiments, please continue to refer to fig. 3, the edge portion 300 may be provided with an edge slit 310, wherein the edge slit 310 penetrates through the edge of the edge portion 300 away from the backplate 200, and the edge slit 310 is provided, when the electronic device is mounted or dismounted, the edge portion 310 may have a larger deformation space, which is convenient for assembly, and meanwhile, the user may pull open the edge slit 310 during dismounting, enlarge the surrounding area of the edge portion 300, and increase the cross-sectional area of the accommodating space 101, so that the electronic device can be taken out of the protective case 100 very conveniently. In some embodiments, the girth 310 is located at the end of the length of the backplate 200. With the arrangement, when the user detaches the electronic device, the force is applied in the length direction of the electronic device, and the whole protective shell 100 can be held by the hand conveniently, so that the electronic device is more convenient. Of course, it is understood that the circumferential seam 310 may be disposed at any other position of the circumferential portion 300. Meanwhile, the number of the peripheral edge seams 310 may be adjusted accordingly according to requirements, for example, one peripheral edge seam 310 may be provided, or a plurality of peripheral edge seams 310 may be provided.

Referring to fig. 3, the surrounding portion 300 is provided with one or more medium portions 320 corresponding to the detection areas, the number of the medium portions 320 may be the same as the number of the detection areas of the electronic device, and the medium portions 320 and the detection areas may be arranged in a one-to-one correspondence. The equivalent dielectric constant value of dielectric portion 320 is less than the dielectric constant value of backplate 200, where the dielectric constant value of backplate 200 is related to the material used to make backplate 200.

As shown in fig. 4, the surrounding portion 300 includes a first surface 301 and a second surface 302 which are opposite to each other, the first surface 301 is located on a side of the surrounding portion 300 facing the accommodating space 101, and the second surface 302 serves as an external appearance surface of the protective case 100.

In one embodiment, the surrounding edge 300 and the backplate 200 are made of the same material, and the two can be combined by integral molding. The thickness of the dielectric portion 320 is less than the thickness of the other areas of the skirt portion 300. The thickness of the dielectric portion 320 refers to the physical dimension of the dielectric portion 320, i.e. the physical dimension in the thickness direction of the edge portion 300, and the physical distance between the first surface 301 and the second surface 302. Referring to fig. 5, a in fig. 5 represents a user, 40 represents a SAR sensor disposed in an electronic device, and an equivalent capacitance is formed between a and the SAR sensor 40. By reducing the thickness of the dielectric portion 320, the surface of the dielectric portion 320 and the surface of the other region of the surrounding portion 300 are filled with the air b, the equivalent dielectric constant of the dielectric portion 320 is equivalent to that formed by the material forming the dielectric portion 320 and the air layer, and the dielectric constant of the air is 1 and is smaller than the dielectric constant of the material forming the dielectric portion 320, so the equivalent dielectric constant of the dielectric portion 320 is smaller than the dielectric constant of the material forming the dielectric portion 320, and the dielectric constant of the dielectric portion 320 is smaller than the dielectric constant of the other region of the surrounding portion 300. In this way, the electronic device can maintain the same C when being mounted in the accommodating space of the protective case 100 _limit And the detection distance d can be shortened, so that the antenna power can be timely reduced, and the user experience is improved.

As a more specific embodiment, please continue to refer to fig. 4, the dielectric portion 320 is provided with a recess 321, and since the recess 321 is provided, the thickness of the dielectric portion 320 is smaller than other regions of the edge portion 300, and the thickness of the dielectric portion 320 is the distance between the first surface 301 and the second surface 302. As shown in fig. 4, the recess 321 may be disposed on a surface of the medium part 320 facing the accommodating space, that is, the recess 321 is disposed on the first surface 301, and in this manner, the second surface 302 of the medium part 320 may be flush with other areas of the surrounding edge part 300, so that the appearance of the protective shell 100 is more consistent. Of course, it is understood that in some embodiments, as shown in fig. 6, the recess 321 may be disposed on the second surface 302, and the first surface 301 of the medium portion 320 may be consistent with other regions of the surrounding edge portion 300. As shown in fig. 7, the recess 321 may also be disposed on both the first surface 301 and the second surface 302, and is not particularly limited herein.

Wherein the recesses 321 may be uniform throughout, i.e. the recesses 321 have the same depth throughout. In some embodiments, the recess 321 may have a different depth everywhere, which is not limited herein. And the extent of the area of the recess 321 may be the same or partially the same as the extent of the area of the dielectric portion 320.

The thickness of the medium part 320 may be less than or equal to 50% of the thickness of the other region of the surrounding part 300, and at this thickness, the detection result of the SAR sensor may not be affected, and the protection effect of the protective case 100 may also be better.

In another embodiment, referring to fig. 8, the medium part 320 may also be configured to be a hollow structure, in which case the first surface 301 of the medium part 320 may be flush with the first surface 301 of the other region of the surrounding edge part 300, the second surface 302 of the medium part 320 may be flush with the second surface 302 of the other region of the surrounding edge part 300, and a hollow cavity 323 is disposed inside the medium part 320, in which case the thickness of the medium part 320 is the sum of the thickness from the first surface 301 to the inner wall surrounding the cavity 323 and the thickness from the second surface 302 to the inner wall surrounding the cavity 323. Similarly, the equivalent dielectric constant of the dielectric portion 320 is smaller than the dielectric constant of the material forming the dielectric portion 320, so that the dielectric constant of the dielectric portion 320 is smaller than the dielectric constant of other regions of the surrounding portion 300. In this way, the electronic device can maintain the same C when being mounted in the accommodating space of the protective case 100 _limit The detection distance d can be shortened, so that the power of the antenna can be timely reducedAnd the user experience is improved.

In a more specific embodiment, referring to fig. 9, the dielectric portion 320 includes a through hole 322 disposed in the surrounding portion 300, the through hole 322 corresponds to the detection area of the electronic device, at this time, since the detection area corresponds to the through hole 322, the through hole 322 is filled with air, the equivalent dielectric constant of the dielectric portion 320 is equal to the dielectric constant of air at this time, and is smaller than the dielectric constants of the backplate 200 and other areas of the surrounding portion 300, by this way, the electronic device can maintain the same C when being installed in the accommodating space of the protection casing 100 _limit And the detection distance d can be shortened, so that the antenna power can be timely reduced, and the user experience is improved. When the through holes 322 are provided, the hole area of the through holes 322 may be smaller than the area of the corresponding detection region, or may be equal to the area of the corresponding detection region. This can avoid forming a hole with a large area in the surrounding edge portion 300, and maintain the structural strength of the surrounding edge portion 300 and the protection effect on the electronic device. Of course, in other embodiments, the hole area of the through hole 322 may be larger than the area of the corresponding detection region. Note that the hole area of the through hole 322 refers to a cross-sectional area of the through hole 322 on the first surface 301 or the second surface 302.

In another embodiment, referring to fig. 10, the thickness of the dielectric portion 320 may be equal to the thickness of the other region of the surrounding portion 300, that is, the first surface 301 of the dielectric portion 320 is flush with the first surface 301 of the other region of the surrounding portion 300, and the second surface 302 of the dielectric portion 320 is flush with the second surface 302 of the other region of the surrounding portion 300. The dielectric part 320 is made of a first material, and other regions of the surrounding part 300 are made of a second material, and the dielectric constant value of the first material is smaller than that of the second material. Illustratively, the first material may be PC (polycarbonate), PMMA (polymethyl methacrylate), etc., and the second material may be silicone, etc., without being particularly limited thereto. In addition, the first material may have a dielectric constant value set to 3-5 and the second material may have a dielectric constant value set to 8-10. In one embodiment, backplate 200 may also be made of a second material, and in this case, the equivalent dielectric constant value of dielectric portion 320 is smaller than the dielectric constant value of backplate 200. During manufacturing, the other region of the surrounding portion 300 and the backplate 200 may be formed by integral injection molding, and then the dielectric portion 320 may be formed by injection molding or the like.

By directly reducing the dielectric constant value of the material at the dielectric portion 320, it is also possible to keep the same C when the electronic device is mounted in the accommodating space of the protective case 100 _limit On the premise of (d), the detection distance d is shortened, so that the antenna power can be timely reduced, and the user experience is improved.

It should be further noted that, in some other embodiments, the dielectric portion 320 may be prepared by using a first material while reducing the equivalent dielectric constant value of the dielectric portion 320, and other areas of the surrounding portion 300 are prepared by using a second material, where the method for reducing the equivalent dielectric constant of the dielectric portion 320 may refer to the contents of the foregoing embodiments, and is not repeated here.

According to the protective case 100 provided by this embodiment, the medium portion 320 corresponding to the detection area of the SAR sensor is arranged on the surrounding portion 300, so that the equivalent dielectric constant value of the medium portion 320 is smaller than the dielectric constant value of the backplate 200, and when the user distance detection is performed in the detection area, the interference to the SAR sensor is smaller, and thus a better detection effect is achieved, and the antenna emission power can be accurately adjusted by the electronic device.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A protective case for protecting an electronic device provided with a SAR sensor that forms one or more detection regions in a circumferential direction of the electronic device, the protective case comprising:

a back plate;

the surrounding edge part is connected to the edge of the backboard and forms an accommodating space for accommodating electronic equipment together with the backboard, one or more medium parts corresponding to the detection area are arranged on the surrounding edge part, and the equivalent dielectric constant value of the medium parts is smaller than that of the backboard.

2. The protective case of claim 1, wherein the thickness of the media portion is less than the thickness of other areas of the skirt portion.

3. The protective case of claim 2, wherein the thickness of the media portion is less than or equal to 50% of the thickness of the other areas of the skirt portion.

4. A protective casing according to claim 2, wherein the media is provided with a recess.

5. The protective case of claim 4, wherein the recess is provided on a surface of the medium portion facing the accommodating space.

6. The protective case of claim 1, wherein the media is provided as a hollow structure.

7. The protective case of claim 1, wherein the media portion comprises a through hole opened in the skirt portion, the through hole corresponding to a detection area of the electronic device.

8. The protective case of claim 7, wherein the aperture area of the through-hole is less than or equal to the area of the detection zone corresponding thereto.

9. The protective case of claim 1, wherein the media portion is made of a first material and other regions of the skirt portion are made of a second material, the first material having a lower dielectric constant value than the second material.

10. A protective casing according to any one of claims 1 to 9 wherein the backplate is integrally formed with the skirt.