CN219980859U - Rear cover plate and mobile terminal - Google Patents

Abstract

The utility model discloses a back cover plate and a mobile terminal with the back cover plate, wherein the back cover plate comprises: the mobile terminal comprises a backboard, a buffer piece and a metal piece, wherein the backboard is an integrated ceramic piece and is provided with an outer surface and an inner surface, the outer surface faces to the external environment, and the inner surface faces to the accommodating space of the mobile terminal; the buffer piece covers the inner surface of the backboard; the metal piece is embedded in the buffer piece, and the metal piece is provided with a contact surface which is contacted with a heat source in the mobile terminal, and the contact surface is exposed out of the buffer piece so as to transfer heat generated by the heat source to the backboard through the metal piece. The heat conduction performance of the metal piece is utilized, heat generated by a heat source in the mobile terminal is transferred to the backboard, and the buffer piece and the metal piece are combined to well protect the internal elements, so that good fixing and buffering effects are achieved, and the integral anti-falling capacity of the mobile phone is greatly improved. The backboard is an integrated ceramic piece and has the advantages of attractive and light texture, high strength, good toughness and good signal receiving.

Description

Rear cover plate and mobile terminal

Technical Field

The utility model relates to the technical field of electronic equipment, in particular to a rear cover plate and a mobile terminal.

Background

Common mobile phone cover plate materials include plastics, metals, glass, ceramics and the like, and compared with plastic made shells, the mobile phone cover plate has the advantages of poor appearance texture and anti-falling property, influence on signal transmission due to the metal made shells, insufficient strength and toughness due to the glass made shells, and the ceramic made shells are widely applied to the preparation of high-end mobile phone cover plates based on the advantages of high hardness, wear resistance, no shielding to signals and the like.

In general, the heat dissipation performance of the ceramic rear cover is inferior to that of the metal rear cover, so that the heat dissipation of the internal element in the actual use process is not timely enough to cause the temperature rise of the back of the mobile phone, and the use experience is poor; the miniaturization and the functional complexity of the internal structure are increasingly increasing the strength requirements of the rear cover. Therefore, there is a need for a ceramic mobile phone cover plate with attractive and light texture, and good heat dissipation capability and anti-falling performance.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the rear cover plate which has good heat dissipation capacity and anti-falling performance.

The utility model further provides the mobile terminal with the rear cover plate.

The back cover plate according to the embodiment of the first aspect of the utility model is applied to a mobile terminal and comprises: the mobile terminal comprises a back plate, a buffer piece and a metal piece, wherein the back plate is an integrated ceramic piece and is provided with an outer surface and an inner surface, the outer surface faces to the external environment, and the inner surface faces to the accommodating space of the mobile terminal; the buffer piece covers the inner surface of the backboard; the metal piece is buried in the buffer piece, the metal piece is provided with a contact surface which is contacted with a heat source in the mobile terminal, and the contact surface is exposed out of the buffer piece so as to transfer heat generated by the heat source to the backboard through the metal piece.

The rear cover plate provided by the embodiment of the utility model has at least the following beneficial effects: and the heat generated by the heat source in the mobile terminal is transferred to the backboard by utilizing the excellent heat conduction performance of the metal piece, so that a good and rapid heat dissipation effect is achieved. Through the setting that cushioning part and metalwork combine, the internal component of protection that can be fine plays good fixed and cushioning effect, has greatly promoted the holistic anti ability that falls of cell-phone. The backboard is an integrated ceramic piece and has the advantages of attractive and light texture, high strength, good toughness and good signal receiving.

According to some embodiments of the utility model, the metal member is a lattice structure having a plurality of hollow regions, and the buffer member includes a first portion filled in the hollow regions.

According to some embodiments of the utility model, the back plate comprises a bottom plate and a frame, the frame surrounds the bottom plate, the metal piece is connected with the bottom plate, and the buffer piece comprises a second part, and the second part is arranged on the frame.

According to some embodiments of the utility model, the junction of the base plate and the rim forms an enclosure having an arc.

According to some embodiments of the utility model, the thickness of the bottom plate is one-fourth to two-thirds of the maximum thickness of the rim.

According to some embodiments of the utility model, the thickness of the second portion gradually decreases from a side of the rim away from the base plate to a side of the rim connecting the base plate, and a minimum thickness of the second portion is equal to a thickness of the first portion.

According to some embodiments of the utility model, a mounting portion is disposed on a side of the bezel away from the chassis, and the mounting portion is configured to mount a display screen of the mobile terminal.

According to some embodiments of the utility model, the thickness of the mounting portion is no more than one half of the maximum thickness of the bezel, and the maximum thickness of the second portion is no greater than the thickness of the mounting portion.

According to some embodiments of the utility model, the back cover further comprises an antenna structure embedded in the second portion, and a thickness of the antenna structure is the same as a thickness of the second portion where the antenna structure is located.

A mobile terminal according to an embodiment of the second aspect of the present utility model comprises a back cover plate according to an embodiment of the first aspect of the present utility model.

The mobile terminal provided by the embodiment of the utility model has at least the following beneficial effects: by adopting the rear cover plate of the embodiment of the first aspect of the utility model, the effects of attractive and light texture, high strength, good toughness and good signal receiving can be obtained, and the rear cover plate has excellent heat dissipation performance and anti-falling performance.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The utility model is further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a plan view of a back cover plate according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional view A-A shown in FIG. 1;

fig. 3 is an enlarged view at B shown in fig. 2.

Reference numerals:

100. a back cover plate; 101. a back plate; 102. a buffer member; 103. a metal piece; 104. a functional hole; 105. a cross bar; 106. a vertical bar; 107. a first portion; 108. a second portion;

201. an outer surface; 202. an inner surface; 203. a bottom plate; 204. a frame; 205. a surrounding structure; 206. a contact surface;

301. a mounting part; 302. a horizontal plane; 303. a vertical surface; 304. an antenna structure; 305. an auxiliary supporting surface.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

In some embodiments, the mobile terminal is a smart phone, and in other embodiments, the mobile terminal may be a tablet computer, a palmtop game console, or the like. The mobile terminal is approximately rectangular block-shaped and comprises a display screen and a rear cover plate, and the display screen is fixedly connected to the rear cover plate. The display screen may include an LCD (liquid crystal display) screen or an OLED (organic light-emitting diode) screen, and the display screen may be used to display information and provide an interactive interface for a user.

Referring to fig. 1 and 2, a back cover plate 100 according to an embodiment of the first aspect of the present utility model includes: back plate 101, cushioning member 102, and metal member 103 are all located on the same side of back plate 101, and are all connected to back plate 101. Specifically, the back plate 101 has an outer surface 201 and an inner surface 202, the outer surface 201 being exposed to the external environment, the inner surface 202 facing the accommodation space of the mobile terminal. Cushioning element 102 and metal element 103 are both located on inner surface 202 of back plate 101.

Referring to fig. 2, it will be appreciated that the back plate 101 has a substantially rectangular block shape, and the back plate 101 includes a bottom plate 203 and a frame 204 integrally formed, and the frame 204 surrounds the bottom plate 203. The connection between the bottom plate 203 and the frame 204 forms a surrounding structure 205 with an arc, that is, the surrounding structure 205 is curved, so that the surrounding structure 205 can form a continuous contour curved surface, and the structure can promote the appearance characteristic of the back cover plate 100 and is beneficial to being held by a user.

Referring to fig. 1, it will be appreciated that the back plate 101 is provided with functional holes 104, the functional holes 104 being located on the bottom plate 203. For example, the functional hole 104 may be an opening for installing a lens, and the size and position of the functional hole 104 may be selected according to actual needs.

Referring to fig. 3, it can be understood that a mounting portion 301 is disposed on a side of the bezel 204 away from the chassis 203, and the mounting portion 301 is used to mount a display screen of the mobile terminal. The mounting portion 301 may be provided in a stepped structure having a horizontal plane 302 and a vertical plane 303, supporting the display screen through the horizontal plane 302, and restricting the peripheral side of the display screen through the vertical plane 303.

Wherein the back plate 101 is an integral ceramic piece, that is, the integral structure of the back plate 101 is integrally manufactured and formed by adopting ceramic materials such as zirconia and/or alumina ceramics. The back plate 101 of ceramic material can obtain an appearance surface with high glossiness and fine texture, and the ceramic material has good abrasion resistance and scratch resistance. Ceramic materials have another feature in that they have good rigidity and can be manufactured in very thin thickness. In use, the ceramic material is not easy to bend. The ceramic material does not influence the signal transmitting and receiving capability of the antenna, and can meet the layout requirements of 3G to 4G or 5G even higher-level antennas. The ceramic material is better, more stand wear and tear in plastic material outward appearance feel than, and the ceramic material is compared metal material and is not shielded to the signal, and the ceramic material is better in glass material intensity toughness than.

Of course, ceramic materials also have some drawbacks. In general, the heat dissipation performance of the ceramic material is inferior to that of the metal material, so that the back temperature of the mobile terminal is raised due to the fact that the heat dissipation of the internal element is not timely carried out in the actual use process, and the use experience is poor. For example, with the popularization and portability of smart phones, more and more functions are realized, miniaturization and complexity of internal components become a trend of development, and meanwhile, the internal structure is dense, so that the components cannot sufficiently dissipate heat after running and heating.

In the back cover plate 100 of the present utility model, by adding the metal member 103 to the inner surface 202 of the back plate 101, the metal member 103 protrudes from the inner surface 202 of the back plate 101 toward the heat source, and the metal member 103 may be made of aluminum alloy, magnesium alloy, stainless steel, or the like. The position of the metal piece 103 corresponds to the position of at least one heat source, which is an electronic component (e.g., CPU or MCU) arranged on a circuit board or on a battery. The metal part 103 is provided with a contact surface 206, the contact surface 206 is used for contacting with a heat source, so that heat generated by the heat source can be transferred to the outer surface 201 of the back plate 101 from the top part of the heat source through the contact surface 206 and the metal part 103 to emit heat, and the heat generated by the electronic components is well and quickly dissipated in the actual use process, so that the defect of the ceramic material in terms of heat dissipation is overcome.

In addition, the back cover plate 100 of the present utility model is also provided with the cushioning member 102, and the cushioning member 102 is provided on the inner surface 202 of the back plate 101 and entirely covers the remaining inner surface 202 of the back plate 101 (the portion other than the inner surface 202 covered by the metal member 103). The buffer member 102 can well protect internal elements, plays a good role in buffering, and greatly improves the overall anti-falling capability of the mobile terminal. The metal piece 103 is buried in the buffer piece 102, the buffer piece 102 wraps the periphery of the metal piece 103, and after the buffer piece 102 and the metal piece 103 are jointly arranged on the back plate 101, the contact surface 206 is exposed out of the buffer piece 102, so that the contact surface 206 can be kept in good contact with a heat source. And the metal piece 103 is combined with the buffer piece 102, so that the connection effect of the metal piece 103 and the backboard 101 can be enhanced, and better heat conduction and heat dissipation are facilitated.

It will be appreciated that cushioning members 102 may be formed of resin that is molded and secured to back plate 101 by in-mold injection. The resin forming the buffer 102 may be one or more of polyvinyl chloride resin, polyethylene terephthalate, acrylonitrile-styrene-butadiene copolymer, polycarbonate, polyimide, polyetherimide, polystyrene, and polypropylene polymer.

Referring to fig. 1, it will be appreciated that the metal member 103 has a grid structure with a plurality of hollow areas, that is, the metal member 103 includes a plurality of transverse bars 105 and a plurality of vertical bars 106, and the transverse bars 105 and the vertical bars 106 meet to form a plurality of rectangular structures, and each rectangular structure has a hollow interior and a hollow position. Of course, the metal piece 103 can be designed into grids with different shapes according to different requirements, so as to meet the installation setting of electronic components with different types and sizes inside the mobile terminal. For example, a grid of a plurality of squares of the same aspect ratio, a grid of a plurality of rectangles of different aspect ratios, a grid of a plurality of circles of the same radius ratio, or a grid of a plurality of circles of different radius ratios are designed.

It should be noted that, in other embodiments, the metal piece 103 may be a plurality of metal sheets disposed at intervals or a plurality of bosses disposed at intervals.

It will be appreciated that the cushioning member 102 is provided in two parts, a first part 107 and a second part 108. The first portion 107 is arranged inside the hollow grid of the metal piece 103, i.e. the first portion 107 fills the hollow area. The metal member 103 is connected to the bottom plate 203, and the first portion 107 is formed on the same plane as the hollow grid of the metal member 103, and has a thickness not exceeding the thickness of the metal member 103, so that the contact surface 206 is exposed outside the buffer member 102. The first portion 107 fills the hollow portion of the hollow grid, which helps to maintain the stability of the grid structure, and is not easy to deflect or dislocate, that is, the buffer member 102 strengthens the connection effect between the metal member 103 and the bottom plate 203, so as to facilitate better heat conduction and dissipation.

The second portion 108 is disposed on the frame 204, i.e. on the outer side of the hollow grid, and the maximum thickness of the second portion 108 is not greater than the thickness of the mounting portion 301, i.e. the maximum thickness of the second portion 108 is less than or equal to the thickness of the horizontal plane 302 of the mounting portion 301. The second portion 108 extends to the bottom plate 203 along with the radian of the surrounding structure 205 to be connected with the first portion 107, so that the protection range is enlarged, a better buffering and damping effect is achieved, and the ceramic backboard 101 is prevented from being broken easily. The top of the second portion 108 is also provided with an auxiliary support surface 305, which auxiliary support surface 305 is substantially flush with the horizontal plane 302 of the mounting portion 301 and may be used to assist in supporting the display screen, thereby reducing the thickness requirements of the mounting portion 301.

Referring to fig. 3, it will be appreciated that the back cover plate 100 of the first aspect of the embodiment of the present utility model further includes an antenna structure 304, the antenna structure 304 being used for signal reception and transmission, and signal conduction may be enhanced by adding the antenna structure 304. In one embodiment, antenna structure 304 may be a metal block. The antenna structure 304 is embedded in the second portion 108, and the thickness of the antenna structure 304 is the same as that of the second portion 108 where the antenna structure 304 is located, so that the antenna structure 304 can perform a stronger signal conduction function and cannot interfere with other structures of the mobile terminal.

The miniaturization and the function complexity of the internal structure are increasingly improved on the strength requirement of the rear cover, and the ceramic material such as zirconia which meets the protection strength and toughness at the present stage has higher density, so that the manufactured ceramic rear cover is heavier, the optimization on the whole quality of the mobile phone can not be obtained, and the requirements of the use feeling of a user and the development of the light and thin intelligent machine are not favorably improved. The back cover plate 100 according to the first embodiment of the present utility model is designed to be thinned, and the weight of the ceramic back cover plate 100 is greatly reduced while maintaining the ceramic texture and high hardness, which is advantageous for development of a slim type.

Wherein in some embodiments, the thickness of the bottom plate 203 is one-fourth to two-thirds of the maximum thickness of the rim 204. By performing drop tests on different structural examples, it was found that the thickness of the frame 204 has a relatively large effect on the strength of the ceramic backplate 101, while the thickness of the bottom plate 203 has a relatively small effect on the strength of the ceramic backplate 101. The thickness of the bottom plate 203 is one-fourth, one-half or two-thirds of the maximum thickness of the frame 204, and the arrangement can realize the light and thin design of the back cover plate 100, and the accommodating space has relatively large volume while maintaining strength so as to be used for installing electronic components of the mobile terminal, thereby realizing compact arrangement of the electronic components and light and thin design of the mobile terminal.

In addition, the strength of the back plate 101 can be enhanced in an auxiliary manner by arranging the metal members 103 with the grid structure on the back plate 101, and the overall anti-falling capability can be improved by arranging the buffer members 102 on the back plate 101, thereby being beneficial to the development of light and thin machine types.

Referring to fig. 2 and 3, it will be appreciated that in some embodiments, the thickness of the frame 204 decreases gradually from the side of the frame 204 away from the base 203 to the side of the frame 204 where the base 203 is connected, so as to reduce the stress at the connection between the base 203 and the frame 204 and improve the overall strength of the back plate 101.

Referring to fig. 2 and 3, it will be appreciated that in some embodiments, the thickness of the second portion 108 gradually decreases from the side of the bezel 204 away from the base plate 203 to the side of the bezel 204 connected to the base plate 203, i.e., the thickness of the second portion 108 is greatest on the side closer to the mounting portion 301 and gradually decreases to the same thickness on the other side as the thickness of the first portion 107. The thickness of the second portion 108 varies with the thickness of the frame 204, so that on the premise of protecting the backplate 101, a buffer material is saved, and the accommodating space of the mobile terminal is increased.

In some embodiments, the thickness of the mounting portion 301 does not exceed one-half of the maximum thickness of the bezel 204, ensuring the strength of the mounting portion 301, and the maximum thickness of the second portion 108 is not greater than the thickness of the mounting portion 301. For example, the maximum thickness of the rim 204 is 2mm, the thickness of the mounting portion 301 (i.e., the width of the horizontal plane 302) is 0.8mm, and the maximum thickness of the second portion 108 is 0.2mm. In other embodiments, the maximum thickness of the bezel 204 may also be 1mm or 3mm.

The mobile terminal of the second aspect of the embodiment of the present utility model includes the back cover plate 100 of the first aspect of the embodiment of the present utility model. Since the mobile terminal includes all technical features of the back cover 100, all the advantages of the back cover 100 are also achieved, and will not be described herein.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.

Claims (10)

1. Rear cover plate is applied to mobile terminal, and its characterized in that includes:

a back plate which is an integrated ceramic piece and is provided with an outer surface and an inner surface, wherein the outer surface faces an external environment, and the inner surface faces a containing space of the mobile terminal;

a buffer member covering an inner surface of the back plate;

the metal piece is buried in the buffer piece, the metal piece is provided with a contact surface which is contacted with a heat source in the mobile terminal, and the contact surface is exposed out of the buffer piece so as to transfer heat generated by the heat source to the backboard through the metal piece.

2. The back plate of claim 1 wherein the metal member is a grid structure having a plurality of hollow regions, the cushioning member including a first portion, the first portion filling the hollow regions.

3. The back plate of claim 2, wherein the back plate comprises a bottom plate and a rim, the rim surrounds the bottom plate, the metal piece is connected with the bottom plate, the buffer comprises a second portion, and the second portion is disposed on the rim.

4. The back plate of claim 3 wherein the junction of the bottom plate and the rim forms an enclosure having an arc.

5. A back cover according to claim 3 wherein the thickness of the base plate is one quarter to two thirds of the maximum thickness of the rim.

6. The back plate of claim 5, wherein the thickness of the second portion gradually decreases from a side of the rim away from the bottom plate to a side of the rim connected to the bottom plate, and the minimum thickness of the second portion is equal to the thickness of the first portion.

7. A back cover plate according to claim 3, wherein the side of the frame remote from the base plate is provided with a mounting portion for mounting a display screen of the mobile terminal.

8. The back plate of claim 7, wherein the thickness of the mounting portion is no more than one-half of the maximum thickness of the rim and the maximum thickness of the second portion is no greater than the thickness of the mounting portion.

9. The back plate of claim 3 further comprising an antenna structure embedded in the second portion, the thickness of the antenna structure being the same as the thickness of the second portion where the antenna structure is located.

10. Mobile terminal, characterized by comprising a back cover according to any of claims 1 to 9.