CN216998246U - Terminal and foam with waterproof and conductive performance - Google Patents

Abstract

The application provides a terminal and bubble cotton that has waterproof and electrically conductive performance belongs to terminal technical field. The foam with the waterproof and conductive performances wraps the foam main body with the waterproof performance by utilizing the conductive layer, and is adhered to a display screen and a middle frame of a terminal by utilizing the adhesive layer with the waterproof performance, so that the foam can realize the waterproof and conductive composite functions; in addition, the conduction characteristic of the grounding device depends on the adhesive force of the adhesive layer, and the stability of grounding impedance is ensured by the adhesive force of the adhesive layer, so that the dependence of the grounding impedance on the resilience is reduced while a plurality of grounding requirements are realized. Because the dependence of the foam on the rebound force is small, when the foam is applied to the terminal, the rebound force applied to the display screen in the terminal is small, the risk of degumming of the display screen in the terminal is reduced, or the probability of occurrence of problems such as bright lines and bright spots of the screen is reduced.

Description

Terminal and foam with waterproof and conductive performance

Technical Field

The application relates to the technical field of terminals, in particular to a terminal and foam with waterproof and conductive performances.

Background

At present, the relative ratio (i.e., the screen occupation ratio) between the screen area of a terminal (such as a mobile phone, a tablet computer, etc.) and the area of a panel where the screen is located is getting higher and higher, which enables a resonant cavity to be formed between a metal layer on a display screen of the terminal and a middle frame, thereby causing a serious electromagnetic compatibility (EMC) problem of the terminal equipment, and seriously affecting the radio frequency and antenna performance of the whole machine.

In the related art, a conductive elastomer is usually used for grounding between the display screen and the middle frame of the terminal, so as to reduce the influence of EMC on radio frequency and antenna performance. But as the refresh rate of the display screen on the terminal is higher and the number of 5G terminal antennas is more and more, the EMC grounding number demand is further increased. However, since the grounding resistance is reduced along with the increase of the pressure generated by the conductive elastic body when the conductive elastic body is grounded, in order to meet the lower grounding resistance, the grounding pressure is often required to be larger than the critical value of the resistance stability, which results in the increase of the total bounce force generated when the conductive elastic body is used for grounding. However, the display screen and the middle frame are often connected in an adhesive manner, so that the bounce force on the display screen is increased when the bounce force of the ground is increased, and finally the display screen of the terminal is in a degumming risk, or the screen is in bright lines, bright spots and the like.

SUMMERY OF THE UTILITY MODEL

This application is in order to overcome the above-mentioned technical problem that exists among the prior art, provides a terminal and has waterproof and electric conductivity's bubble cotton, can reduce the bounce that the display screen received in the terminal under the prerequisite of guaranteeing terminal ground connection demand, and then satisfies complete machine EMC demand and reduces the risk that the display screen comes unstuck in the terminal, perhaps reduces the probability that screen bright line, bright spot scheduling problem appear.

Therefore, the embodiment of the application adopts the following technical scheme:

in a first aspect, the embodiment of the application provides a foam with waterproof and conductive performances, which comprises a foam body with waterproof performance, wherein the outer surface of the foam body comprises an upper surface, a first side surface and a lower surface; the bonding layers have waterproof performance and are at least positioned on the upper surface and the lower surface of the foam main body; the conducting layer is positioned on the bonding surface of one side, away from the foam main body, of the bonding layer, and extends from the upper surface of the foam main body to the lower surface of the foam main body through the first side surface of the foam main body; the area of the conductive layer on the upper surface is smaller than that of the bonding layer on the upper surface, and the area of the conductive layer on the lower surface is smaller than that of the bonding layer on the lower surface.

Therefore, the foam with the waterproof and conductive performances wraps the foam main body with the waterproof performance through the conductive layer, and is adhered to the display screen and the middle frame of the terminal through the adhesive layer with the waterproof performance, so that the foam can realize the waterproof and conductive composite functions; in addition, the conduction characteristic depends on the adhesive force of the adhesive layer, and the stability of the grounding impedance is ensured through the adhesive force of the adhesive layer, so that the dependence of the grounding impedance on the bounce force is reduced while a plurality of grounding requirements are realized. Because the dependence of the foam on the rebound force is small, when the foam is applied to the terminal, the rebound force applied to the display screen in the terminal is small, the risk of degumming of the display screen in the terminal is reduced, or the probability of occurrence of problems such as bright lines and bright spots of the screen is reduced. For example, the terminal in the present solution may be a 5G terminal, and may also be a SUB-6G terminal.

In one possible implementation, the first end of the conductive layer is located on the upper surface of the foam body, wherein the first end has a first distance from an edge of the upper surface on a side away from the first end. From this, realize the conducting layer and to the half parcel of the cotton main part of bubble to carry out water repellent to the terminal in the follow-up flow.

In one possible implementation, the second end of the conductive layer is located on the lower surface of the foam body, wherein the second end has a second distance from an edge of a side of the lower surface away from the second end. From this, realize the conducting layer and to the half parcel of the cotton main part of bubble to carry out water repellent to the terminal in the follow-up flow.

In one possible implementation, the conductive layer includes a plurality of sub-conductive strips arranged at intervals. Therefore, the bonding layer is convenient for bonding the foam with the display screen and the middle frame in the terminal.

In one possible implementation, the width of the sub-conductive strips is less than or equal to the width between adjacent sub-conductive strips. Thereby, the adhesive force of the adhesive layer is improved.

In one possible implementation, the foam body comprises a silicone foam.

In one possible implementation, the adhesive layer is made of an insulating material.

In one possible implementation, the conductive layer includes one or more of a conductive cloth and a polyimide film.

In a second aspect, embodiments of the present application provide a terminal, including a middle frame, a display assembly, and the foam described in the first aspect above, which has waterproof and conductive properties; wherein, the tie coat on the upper surface of the cotton main part of bubble bonds with the display module in the bubble is cotton, and the tie coat on the lower surface of the cotton main part of bubble bonds with the center in the bubble is cotton.

Therefore, the terminal can reduce noise in a resonant cavity between the middle frame and the display screen by using the foam described above; in addition, because the dependence of the grounding impedance corresponding to the foam on the bounce is small, the bounce suffered by the display screen in the terminal is small, the risk of degumming of the display screen in the terminal is further reduced, or the probability of occurrence of problems such as bright lines, bright spots, film printing and the like of the screen is reduced.

In one possible implementation manner, the foam is multiple, wherein the first side surface of the foam main body in each foam faces the inner side of the middle frame, and the end parts of the adjacent foams are bonded. Therefore, the terminal is convenient to be subjected to waterproof treatment.

In one possible implementation, the shape of the plurality of foam combined in the terminal is rectangular. Therefore, the terminal is convenient to be subjected to waterproof treatment.

In a possible implementation manner, a first waterproof glue layer is coated on a second side surface of the foam main body in each foam, a second waterproof glue layer is coated on a joint of each second side surface and the display assembly and the middle frame, and the second side surface is a surface facing the outer side of the middle frame on the foam main body. Thereby, the terminal is subjected to waterproofing so that the terminal has waterproofing performance.

Drawings

The drawings that accompany the detailed description can be briefly described as follows.

Fig. 1 shows a schematic view of a partial structure of a terminal;

FIG. 2 is a schematic structural diagram of a foam provided in the embodiments of the present application;

FIG. 3 is a schematic cross-sectional view of a foam provided in an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a foam provided in an embodiment of the present application;

FIG. 5 is a schematic cross-sectional view of a foam provided in an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a foam provided in the embodiments of the present application;

FIG. 7 is a schematic cross-sectional view of a foam provided in an embodiment of the present application;

fig. 8 is a schematic diagram of an arrangement of a conductive layer on foam according to an embodiment of the present disclosure;

FIG. 9 is a schematic diagram illustrating an expanded shape of a conductive layer on foam according to an embodiment of the present disclosure;

FIG. 10 is a schematic diagram illustrating an expanded shape of a conductive layer on foam according to an embodiment of the present disclosure;

fig. 11 is a schematic partial structure diagram of a terminal provided in an embodiment of the present application;

FIG. 12 is a schematic view of the arrangement of foam in a terminal provided in an embodiment of the present application;

fig. 13 is a schematic view of the arrangement of foam in a terminal provided in the embodiments of the present application.

Illustration of the drawings:

11-a conductive elastomer; 12-foam cotton;

21-foam body; 22-a conductive layer; 23-a tie layer;

211-upper surface; 212-lower surface; 213-side surface;

221-sub conductive strip; 222-conductive connection strips;

231-a first distance; 232-a second distance;

31-middle frame; 32-display components.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be described below with reference to the accompanying drawings.

Fig. 1 shows a schematic diagram of a partial structure of a terminal. As shown in fig. 1, a plurality of conductive elastic bodies 11 are arranged in the middle frame of the terminal a, and the conductive elastic bodies 11 are connected with the middle frame and the display screen of the terminal a so as to realize grounding of the middle frame and the display screen, further realize clutter backflow in a resonant cavity formed between the middle frame and the display screen, and reduce the influence of the clutter on the antenna in the terminal a. At present, the number of the conductive elastic bodies 11 is generally 4 to 9, but as the number of the antennas in the terminal a increases, the requirement for the number of the ground in the terminal a also increases correspondingly, so that the required number of the conductive elastic bodies 11 further increases. When the number of the conductive elastic bodies 11 is increased, the total bounce force generated by the plurality of conductive elastic bodies 11 will be increased, and thus the display screen has the risk of degumming, or the problems of bright lines, bright spots and the like.

In order to solve the existing technical problems, in some schemes, the foam 12 required by a waterproof design can be used for further increasing the adhesion between the display screen and the middle frame in the terminal a. The foam 12 is bonded to the display screen and the bezel, respectively, with a bonding material such as glue, for example. However, because the bonding force between the foam 12 and the display screen and the middle frame is limited, when the grounding quantity required in the terminal a is too much, the display screen of the terminal a still has the degumming risk, or the problems of bright lines and bright spots of the screen and the like.

In order to solve the problems that the display screen in the terminal still has the degumming risk, or the screen has bright lines, bright spots and the like, the terminal and the foam with the waterproof and conductive performances are provided.

Fig. 2 is a schematic structural diagram of a foam provided in an embodiment of the present application. As shown in fig. 2, the foam comprises a foam body 21, a conductive layer 22 and an adhesive layer (not shown). The adhesive layer may be applied to the outer surface of the foam body 21, for example, on the upper surface 211 of the foam body 21, on the lower surface 212 of the foam body 21, on the side surface 213 of the foam body 21; here, the side surface 213 may be a left side surface or a right side surface. It is understood that the outer surface of the foam body 21 may include an upper surface 211, a side surface 213, and a lower surface 212. In one example, the foam body 21 may be made of a polymer foam material; the conductive layer 22 may include one or more of a conductive cloth, a polyimide film (PI film), and an adhesive layer may be made of an insulating material, for example, the foam body 21 may be a silicon foam, the adhesive layer may be made of a waterproof adhesive, and the conductive layer 22 may be a tin-plated PI film or a gold-plated PI film.

In this scheme, bubble cotton main part 21 and tie coat all have waterproof performance. Illustratively, the adhesive layers are located on at least the upper and lower surfaces of the foam body.

In this embodiment, the conductive layer 22 may be laid on the adhesive layer, that is, the conductive layer 22 is located on the adhesive surface of the adhesive layer on the side away from the foam body 21. Illustratively, as shown in fig. 3, conductive layer 22 is positioned over adhesive layer 23, and adhesive layer 23 is positioned on the outer surface of foam body 21.

In this embodiment, the conductive layer 22 may extend from the upper surface 211 of the foam body 21 to the lower surface 212 of the foam body 21 through the side surface 213 of the foam body 21, that is, the conductive layer 22 may wrap the foam body 21. Illustratively, as shown in fig. 4 and 5, the conductive layer 22 may fully encapsulate the foam body 21; as shown in fig. 2 and 3, the conductive layer 22 may also partially wrap, e.g., half wrap, the foam body 21.

In one example, to facilitate the foam to facilitate connection with the display and center of the terminal, the area of the conductive layer 22 on the upper surface 211 of the foam body 21 in the foam may be less than the area of the adhesive layer on the upper surface 211, and the area of the conductive layer 22 on the lower surface 212 of the foam body 21 in the foam may be less than the area of the adhesive layer on the lower surface 212. Illustratively, the adhesive layer on the upper surface 211 may cover the upper surface 211, and the conductive layer 22 on the upper surface 211 may cover a portion of the upper surface 211. For example, as shown in fig. 3, the adhesive layer 23 may be spread over the upper surface of the foam body 21, and the conductive layer 22 may cover a portion of the upper surface of the foam body 21.

In one example, as shown in fig. 6 or 7, a first end of the conductive layer 22 may be located on the upper surface 211 of the foam body 21, wherein the first end has a first distance 231 from an edge of the side of the upper surface 211 away from the first end. Further, a second end of the conductive layer 22 may be located on the lower surface 212 of the foam body 21, wherein the second end has a second distance 232 from an edge of the side of the lower surface 212 remote from the second end. It will be appreciated that in fig. 6 or 7 the conductive layer 22 may be understood to be partially wrapped, e.g. semi-wrapped, about the foam body 21.

In one example, as shown in fig. 2 or 8, the conductive layer 22 may include a plurality of sub-conductive strips 221 spaced apart to facilitate the connection of the foam to the display screen and the bezel of the terminal. As shown in fig. 8, in the present embodiment, the width a of the sub-conductive strip 221 may be less than or equal to the width b between adjacent sub-conductive strips 221 to ensure impedance. It can be understood that the larger the width between the adjacent sub conductive strips 221 is, the larger the contact area between the corresponding adhesive layer and the display screen and the middle frame of the terminal is, so that the larger the adhesive force between the foam and the display screen and the middle frame of the terminal can be ensured, and the lower grounding impedance can be effectively satisfied.

In one example, with continued reference to fig. 8, the conductive layer 22 may further include a conductive connection bar 222, and the conductive connection bar 222 may connect a plurality of sub-conductive bars 221 arranged at intervals to enhance the conductive effect.

In one example, the shape of the spread of the conductive layer 22 in the present embodiment may be various, for example, the spread shape may be the shape shown in fig. 9 or fig. 10, which is specific to the actual situation and is not limited herein.

In one example, the conductive layer 22 mainly conducts electricity, and when the foam is applied to the terminal, the conductive layer 22 can ground the display screen and the middle frame in the terminal, so as to reduce the influence of noise in the resonant cavity formed by the display screen and the middle frame on the antenna. The tie coat mainly plays the effect of pasting, and it can be used for fixed conducting layer 22 to make conducting layer 22 can wrap up the cotton main part 21 of bubble, also can be used for pasting the bubble cotton with display screen and center fixed, and then make conducting layer 22 can be with the display screen in the terminal and center ground connection. In addition, the adhesive layer may also be used to provide a pressing force between the conductive layer 22 and the display screen and the middle frame through its own adhesive force, so as to ensure the stability of the ground impedance through the adhesive force of the adhesive layer, thereby reducing the requirement of the ground impedance for the bounce force. The foam body 21 mainly plays a supporting role, and can be extruded, so that the adhesive force between the adhesive layer and the display screen and the middle frame in the terminal is improved. In addition, the foam body 21 can also play a role in water and dust prevention.

The above is the introduction to the foam with conductive performance provided in this solution. It can be understood that the foam with the conductive performance utilizes the conductive layer to wrap the foam main body, and utilizes the adhesive layer to stick the foam to the display screen and the middle frame of the terminal, so that the foam can realize the waterproof and conductive composite functions; in addition, the conduction characteristic depends on the adhesive force of the adhesive layer, and the stability of the grounding impedance is ensured through the adhesive force of the adhesive layer, so that the dependence of the grounding impedance on the bounce force is reduced while a plurality of grounding requirements are realized. Because the foam has less dependence on the rebound force, when the foam is applied to the terminal, the rebound force applied to the display screen in the terminal is smaller, so that the risk of degumming of the display screen in the terminal is reduced, or the probability of occurrence of problems such as bright lines and bright spots of the screen is reduced.

It can be understood that the foam with waterproof and conductive properties provided in the present solution has at least the following advantages:

1) the waterproof and conductive composite function is realized;

2) the stability of the grounding impedance is ensured through the adhesive force of the adhesive layer on the grounding impedance, and the requirement of the grounding impedance on the resilience is reduced;

3) when the foam is applied to the terminal, the dependence of the grounding impedance on the bounce is small, so that the bounce borne by a display screen in the terminal is reduced, and the problems of bright lines, bright spots and the like of the screen are further reduced. In addition, the risk of display screen degumming in the terminal is also reduced.

Next, a terminal with the foam described above is introduced.

Fig. 11 is a schematic partial structure diagram of a terminal provided in an embodiment of the present application. As shown in fig. 7, the terminal includes a middle frame 31, a foam having waterproof and conductive properties as described in the above embodiments, and a display assembly 32. In this scheme, the adhesive layer on the upper surface 211 of the foam main body 21 in the foam can be bonded with the display module 32, and the adhesive layer on the lower surface 212 of the foam main body 21 in the foam can be bonded with the middle frame 31.

In one example, as shown in fig. 12, the number of the foam used in the terminal described in the above embodiment may be plural. Wherein, the first side surface (i.e. the side applied with the conductive layer 22) of the foam body 21 in each foam faces the inner side of the middle frame 31.

In one example, as shown in fig. 13, in order to improve the waterproof performance of the terminal, a plurality of foam in the terminal may be arranged in a rectangular shape, and ends of adjacent foam may be bonded. It should be understood that the plurality of foam arranged in a rectangular shape can be understood that the shape formed by combining the plurality of foam in the terminal is a rectangular shape (i.e., the shape shown in fig. 13), and this design, in addition to being waterproof, can also prevent particles such as dust from entering the inside of the terminal, and improves the dustproof performance of the terminal.

In addition, in order to further improve the waterproof performance of the terminal, a first waterproof adhesive layer is coated on the second side surface of the foam body 21 in each foam, and a second waterproof adhesive layer is coated on the joint of each second side surface and the display assembly 32 and the middle frame 31. Wherein, the second side surface is the surface towards the center outside on the bubble cotton main part. Illustratively, the second side surface may be a surface of the foam body 21 on which the conductive layer 22 is not applied. For example, the first waterproof glue layer and the second waterproof glue layer can be formed by painting waterproof glue.

The above is an introduction to the terminal provided in the present solution. It will be appreciated that the terminal may utilize the foam described above to reduce noise in the resonant cavity between the bezel and the display screen; in addition, because the grounding impedance corresponding to the foam has small dependence on the bounce, the bounce borne by the display screen in the terminal is small, and the risk of degumming of the display screen in the terminal is further reduced, or the probability of occurrence of problems such as bright lines and bright spots of the screen is reduced.

It can be understood that, in this embodiment, the display component on the terminal may be understood as a display screen, and may also be understood as a component formed by the display screen and other components besides the display screen. Illustratively, the display screen may be a Liquid Crystal Display (LCD) screen or an organic light-emitting diode (OLED) screen.

In one example, the terminal in the present embodiment may be a mobile phone, a tablet computer, etc., which has at least two components, i.e., a display screen and a center frame. Illustratively, the terminal may have antennas therein, and each antenna in the terminal may be used to cover a single or multiple communication bands. Different antennas can also be multiplexed to improve the utilization of the antennas. For example: the antennas may be multiplexed as diversity antennas for a wireless local area network. In other examples, the antenna may be used in conjunction with a tuning switch.

It should be understood that throughout the description of the embodiments of the present application, words such as "exemplary," "for example," or "for example" are used to indicate example, instance, or illustration. Any embodiment or design described herein as "exemplary," "e.g.," or "e.g.," is not to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the words "exemplary," "e.g.," or "exemplary" is intended to present relevant concepts in a concrete fashion.

In the description of the embodiments of the present application, the term "and/or" is only one kind of association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, B exists alone, and A and B exist at the same time. In addition, the term "plurality" means two or more unless otherwise specified. For example, the plurality of systems refers to two or more systems, and the plurality of screen terminals refers to two or more screen terminals. The terms "upper", "lower", "front", "rear", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application. The terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit indication of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.

In the description of the embodiments of the present application, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected" and "connected" should be interpreted broadly, and may be, for example, a fixed connection, a detachable connection, an interference connection or an integral connection; the specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.

Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples throughout this specification.

Finally, the description is as follows: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims (12)

1. A foam with waterproof and conductive properties, comprising:

a foam body having water-repellent properties, an outer surface of the foam body comprising an upper surface, a first side surface and a lower surface;

adhesive layers with waterproof performance, wherein the adhesive layers are at least positioned on the upper surface and the lower surface of the foam body;

the conducting layer is positioned on the bonding surface of one side, away from the foam main body, of the bonding layer, and extends from the upper surface of the foam main body to the lower surface of the foam main body through the first side surface of the foam main body;

the area of the conducting layer on the upper surface is smaller than that of the bonding layer on the upper surface, and the area of the conducting layer on the lower surface is smaller than that of the bonding layer on the lower surface.

2. The foam of claim 1, wherein a first end of the conductive layer is located on an upper surface of the foam body, wherein the first end is a first distance from an edge of the upper surface on a side away from the first end.

3. The foam of claim 1, wherein a second end of the conductive layer is located on a lower surface of the foam body, wherein the second end is a second distance from an edge of the lower surface on a side away from the second end.

4. The foam of claim 1, wherein the conductive layer comprises a plurality of spaced apart sub-conductive strips.

5. The foam of claim 4, wherein the width of the sub conductive strips is less than or equal to the width between adjacent sub conductive strips.

6. The foam of claim 1, wherein the foam body comprises a silicone foam.

7. Foam according to claim 1, characterized in that the adhesive layer is made of an insulating material.

8. The foam according to any one of claims 1 to 7, wherein the conductive layer comprises one or more of a conductive cloth, a polyimide film.

9. A terminal comprising a middle frame, a display assembly, and the foam of any of claims 1-8 having waterproof and electrically conductive properties;

the display assembly comprises a display assembly, a foam body and a middle frame, wherein the display assembly is arranged on the upper surface of the foam body in the foam body, the middle frame is arranged on the lower surface of the foam body in the foam body, and the middle frame is arranged on the lower surface of the foam body in the foam body.

10. A terminal as claimed in claim 9, wherein the foam is plural, wherein the first side surface of the foam body in each foam faces the inner side of the center frame and is bonded adjacent to the end of the foam.

11. A terminal as claimed in claim 10, wherein a plurality of said foam is combined in said terminal to form a rectangular shape.

12. A terminal as claimed in claim 10 or 11, wherein each of the foam has a first layer of waterproof glue applied to a second side surface of the foam body, and a second layer of waterproof glue applied to a joint between each of the second side surfaces and the display module and the middle frame, wherein the second side surface is a surface of the foam body facing the outside of the middle frame.

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