WO2020063498A1

WO2020063498A1 - Foam and terminal

Info

Publication number: WO2020063498A1
Application number: PCT/CN2019/107157
Authority: WO
Inventors: 徐治效; 王磊; 李旺益
Original assignee: 华为技术有限公司
Priority date: 2018-09-29
Filing date: 2019-09-22
Publication date: 2020-04-02
Also published as: CN109348695B; CN109348695A

Abstract

The present application provides foam, comprising a conductive adhesive, a drawable component, and a conductive frame. The drawable component is provided in the conductive frame; the conductive adhesive comprises a first conductive adhesive layer and a second conductive adhesive layer, and the conductive frame is provided between the first conductive adhesive layer and the second conductive adhesive layer; a first surface of the conductive frame is adhered to a first surface of the first conductive adhesive layer, and a second surface of the conductive frame is adhered to a first surface of the second conductive adhesive layer. According to the present application, two conductive adhesive layers are provided and a drawable component is provided in a conductive frame, so that in practical application, the drawable component is removed to reduce the thickness of foam, thereby avoiding the problem of white spots on a display screen caused by the thickness of common foam. In addition, the conductive effect can also be enhanced by providing a foam structure comprising two conductive adhesive layers, so as to achieve electric connection between a middle frame and a display screen assembly in a display area.

Description

Foam and terminal

Technical field

The present application relates to the field of terminals, and in particular, to a foam and a terminal.

Background technique

Ordinary foam is currently set in a terminal with a high screen ratio (that is, the ratio of the screen area on the terminal to the area of the panel on which the screen is located). As shown in Figure 1, ordinary foam needs to be set in the middle frame. And the display assembly, for connecting the middle frame and the display assembly to realize the electrical connection between the two in the display area. The purpose of the electrical connection is to shield the antenna of the terminal from interfering with the display assembly. Specifically, the interference current on the display assembly is guided to the middle frame through ordinary foam, and is derived from the middle frame.

In actual use, the ordinary foam needs to be compressed to activate the conductive adhesive on the ordinary foam, so as to realize the electrical connection between the middle frame and the display assembly. However, due to the consideration of the overall thickness of the existing terminal, the thickness of ordinary foam needs to be reduced. The thickness of the existing ordinary foam can be compressed to a minimum of 0.5 mm, which has fallen short of the current demand for foam thickness of the terminal. The ordinary foam is then compressed, and the pressure generated will be applied to the display screen of the display module, causing the display screen to become partially white and white spots.

Summary of the Invention

The present application provides a foam. By providing two layers of conductive adhesive and withdrawable parts between conductive frames, in actual use, the extractable parts can be removed to reduce the thickness of the foam, which avoids ordinary foams due to their thickness. The cause of white spots on the display.

In a first aspect, a foam is provided, which may include: a conductive adhesive, a withdrawable member, and a conductive frame;

Extractable parts are placed in the conductive frame;

The conductive glue includes a first layer of conductive glue and a second layer of conductive glue, and a conductive frame is disposed between the first layer of conductive glue and the second layer of conductive glue;

The first surface of the conductive frame is adhered to the first surface of the first layer of conductive adhesive, and the second surface of the conductive frame is adhered to the first surface of the second layer of conductive adhesive.

In the embodiment of the present application, two layers of conductive adhesive are provided and a withdrawable member is provided between the conductive frames. In actual use, the withdrawable member can be removed to reduce the thickness of the foam, and the ordinary foam is prevented from being displayed due to its thickness. White spots on the screen. In addition, the foam structure provided with two layers of conductive glue can also enhance the conductive effect and achieve the electrical connection between the middle frame and the display assembly in the display area.

In a possible implementation manner, the above-mentioned "extractable component" may be a non-conductive soft material and does not chemically react with the conductive frame.

Since the extractable part needs to be removed after the conductive adhesive is activated, in order to facilitate the removal of the extractable part, it is necessary to limit that the extractable part does not chemically react with the conductive frame.

In another possible implementation manner, the above-mentioned "extractable component" may be at least one of silica gel, sponge, cotton, and a polymer foam material.

In another possible implementation manner, the foregoing “conductive frame” may be a columnar structure or a U-shaped columnar structure.

Because the U-shaped pillar structure facilitates the removal of the extractable part, it can be regarded as the preferred solution in this application.

In another possible implementation manner, a transition layer is further included between the conductive frame and the withdrawable component;

Among them, the transition layer refers to a material that is adhered to the conductive frame after the extractable member is removed, and the transition layer does not chemically react with the extractable member and the conductive frame.

Because each terminal has different requirements for the thickness of the terminal, the requirements for the thickness of the foam are also different, and the thickness of the foam can be adjusted by providing the transition layer.

In still another possible implementation manner, the foregoing “foam” may further include a reserved handle, and the reserved handle is connected to the withdrawable component, and is used for removing the withdrawn handle and removing the withdrawable component when removing the withdrawable component. component.

Since the extractable part needs to be removed, for the convenience of removal, a reserved handle can be provided, and the extractable handle can be removed to remove the extractable part.

In another possible implementation manner, the material of the “reserved handle” is the same as the material of the withdrawable part.

In a second aspect, an embodiment of the present application provides a terminal, which may include the foam in the first aspect. The terminal further includes a middle frame and a display assembly, and the second surface of the middle frame and the first layer of conductive adhesive in the foam. Adhesion, the display assembly is adhered to the second surface of the second layer of conductive adhesive in the foam.

In a third aspect, an embodiment of the present application provides a method for installing foam, which may include: adhering a second surface of a first layer of conductive adhesive in the foam to a middle frame;

Bonding the second surface of the second layer of conductive adhesive in the foam to the display assembly;

Compressing the middle frame and display components to activate the conductive adhesive in the foam;

Remove the extractable parts from the foam within a preset time after the conductive glue is activated.

In a possible implementation manner, in the above-mentioned step of “compressing the center frame and the display assembly”, the thickness of the foam varies with the compression process from 0.2 to 1 mm, where the thickness of the foam refers to The length from the second surface of the first conductive adhesive to the second surface of the second conductive adhesive.

In another possible embodiment, after the foam is compressed, the thickness of the foam is 0.2-0.5 mm.

In yet another possible embodiment, the thickness of the foam is 0.4 mm after the foam is compressed.

In yet another possible implementation manner, before the step of “adhesing the second surface of the first conductive adhesive in the foam with the middle frame”, the method further includes:

A hole is set in the middle frame, and the distance between the hole and the position where the foam is installed is within a preset range.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of a foam;

2 is a schematic structural diagram of a foam according to an embodiment of the present application;

FIG. 3 is another schematic structural diagram of a foam according to an embodiment of the present application; FIG.

4 is a schematic structural diagram including a reserved handle according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a foam removal and extractable component according to an embodiment of the present application; FIG.

6 is a schematic structural diagram of a foam after removing a drawable component according to an embodiment of the present application;

7 is a flowchart of a method for installing a foam according to an embodiment of the present application;

8 is a schematic structural diagram of a middle frame according to an embodiment of the present application;

9 is a schematic plan view of a foam with a reserved handle according to an embodiment of the present application;

FIG. 10 is a schematic side view of a foam with a reserved handle according to an embodiment of the present application.

detailed description

In order to facilitate the understanding of the embodiments of the present application, the following will further explain the specific embodiments with reference to the accompanying drawings, and the embodiments do not limit the embodiments of the present application.

At present, ordinary foam generally includes three parts, as shown in FIG. 1, a non-conductive sponge portion 101, a conductive portion 102 (for example, at least one of a conductive cloth or a copper foil), and a conductive adhesive 103. The non-conductive sponge part 101 is covered with a conductive cloth 102, and the conductive adhesive 103 is fixed on a device to be shielded (for example, a display assembly, where the display assembly includes a display screen). Good surface conductivity, in order to shield the interference of the antenna to the screen components in the terminal. However, due to structural reasons, the thickness of conventional foams is limited. At present, the thickness of ordinary foam can be as small as about 0.5 millimeters. When the ordinary foam with this thickness is applied to a new type of terminal with a small current thickness, the ordinary foam will be set in the display area of the terminal (for example: Between the display screen) and the middle frame, white spots appear in the display area (for example, the display screen) due to the influence of the thickness of ordinary foam, which affects the user experience.

Therefore, the embodiments of the present application provide a foam and a terminal. By providing two layers of conductive adhesive and a drawable member between the conductive frames, the drawable member can be removed to reduce the thickness of the foam in actual use, which avoids Ordinary foam causes white spots on the display due to its thickness.

The technical solutions of the embodiments of the present application are described below with reference to FIGS. 2 to 7.

FIG. 2 is a schematic structural diagram of a foam according to an embodiment of the present application.

As shown in FIG. 2, the foam 20 provided in the embodiment of the present application includes a conductive frame 201, a withdrawable member 202, and a conductive adhesive, wherein the conductive adhesive includes a first layer of conductive adhesive 231 and a second layer of conductive adhesive 232.

Specifically, the extractable member 202 is disposed in the conductive frame 201, and the conductive frame 201 is disposed between the first layer of conductive glue 231 and the second layer of conductive glue 232. The first surface of the conductive frame 201 is adhered to the first surface of the first layer of conductive adhesive 231, and the second surface of the conductive frame 201 is adhered to the first surface of the second layer of conductive adhesive 232.

The purpose of setting the extractable part 202 is to activate the conductive adhesive by using the overall foam structure, and remove the extractable part 202 to reduce the thickness of the overall foam, thereby avoiding the occurrence of white spots on the display screen due to the thickness of ordinary foam. problem. The extractable part is a non-conductive soft material, which does not chemically react with the conductive frame, and may specifically be at least one of silica gel, sponge, cotton, and polymer foam material.

In the above structure, the purpose of providing two layers of conductive glue is to enhance the conductivity. After the activated conductive adhesive, the electricity of the display assembly can be transferred to the first conductive adhesive 231 through the second conductive adhesive 232, and the first conductive adhesive 231 conducts the electrical conductivity to the middle frame, and the potential of the middle frame is zero , You can export electricity to achieve the electrical connection between the middle frame and the display assembly.

In a possible embodiment, as shown in FIG. 2, the conductive frame 201 may be a cylindrical frame structure, that is, a closed structure of one week, and the extractable part 202 is filled in the cylindrical frame structure.

In another possible embodiment, as shown in FIG. 3, the conductive frame 201 may be a U-shaped pillar frame structure, that is, a semi-enclosed open structure, and the extractable part 202 is also filled in the recess of the U-shaped structure.

It should be noted that, in any of the foregoing possible embodiments, a transition layer may be further included between the conductive frame 201 and the withdrawable member 202. Wherein, the transition layer refers to a material that is adhered to the conductive frame 201 or the extractable member 202 after the extractable member 202 is removed, and no chemical reaction occurs between the transition layer and the extractable member 202 and the conductive frame 201. This material can be understood as a material that controls the thickness of foam. According to the design of the overall thickness of the terminal, the thickness of the foam is limited. For example, when the thickness of the terminal body is controlled at about 7.3 mm, the requirements for foam are 0.45 mm, where the thickness of the conductive frame 201 and the two layers of conductive adhesive is about 0.3 mm, the transition layer can be preset between 0.1-0.15 mm.

In addition, the above-mentioned foam 20 may further include a reserved handle 204. As shown in FIG. 4, the reserved handle may be adhered to the extractable member 202 for removing the reserved handle and removing it when the extractable member 202 is removed. Drawable part 202. In a possible embodiment, the material of the reserved handle is the same as that of the extractable member 202. For example, when the extractable member 202 is filled inside the conductive frame 201, an additional portion (ie, a reserved handle) may be provided on a portion having no conductive frame in the cross section to facilitate removal of the extractable member 202.

The above-mentioned steps for removing the withdrawable component 202 can be shown in FIG. 5, which will be described in detail in conjunction with FIG. 5.

FIG. 5 is a schematic structural diagram of a foam removal and extractable component according to an embodiment of the present application.

As shown in FIG. 5, the conductive frame 201 is a U-shaped column frame structure, that is, a semi-enclosed open structure. The extractable member 202 is also filled in the recess of the U-shaped structure, between the conductive frame 201 and the extractable member 202. A transition layer is set. After the extractable member 202 is removed, at this time, the foam includes only the conductive frame 201, two conductive adhesives, and a transition layer.

It should be noted that when removing the extractable member 202, the extractable member 202 may be removed by pulling out the reserved handle. As shown in FIG. 6, the transition layer is adhered to the conductive frame 201. In another possible implementation manner, the transition layer may also be adhered to the extractable member 202. When the extractable member 202 is removed, the transition is removed together. Floor. At this time, after removing the extractable member 202, the foam only includes the conductive frame 201 and the conductive glue. In another possible implementation manner, the transition layer may be provided in two layers, one layer is adhered to the extractable member 202, and the other layer is adhered to the conductive frame 201. When the extractable member 202 is removed, it is removed together. A transition layer. At this time, when removing the extractable member 202, the foam only includes the conductive frame 201, another transition layer, and a conductive adhesive.

FIG. 7 is a flowchart of a method for installing a foam according to an embodiment of the present application.

As shown in FIG. 7, the method may include S710-S740, which may be specifically applied to a terminal. In this embodiment, the terminal may refer to at least one of a mobile phone or a tablet with a high screen occupation, as specifically described below. Show:

S710: Adhere the second surface of the first layer of conductive adhesive in the foam to the middle frame.

Specifically, the centrifugal paper on the second surface side of the first layer of conductive adhesive is removed, and the foam is placed at a preset position between the middle frame and the screen assembly.

In addition, before this step, it may also include setting a hole in the middle frame, and the size of the hole setting may be determined by the size of the reserved handle. In another possible implementation manner, the preset threshold may also be met. the size of. The distance between the position of the hole and the position where the foam is installed is within a preset range.

The purpose of setting this hole is to make it easier to pull out the reserved handle or the reserved handle and the withdrawable parts after fitting the foam. Wherein, the position of the hole is the position where the reserved handle in the foam is pulled out after the foam is fit. For example, a hole is punched 0.1 mm from the preset position (the dotted frame) where the foam is placed, as shown in FIG. 8.

S720: Adhere the second surface of the second conductive adhesive in the foam to the display assembly.

Specifically, the centrifugal paper on the second surface of the second layer of conductive adhesive is removed to facilitate adhesion to the display screen assembly.

It should be noted that, in another possible embodiment, S720 may be executed first, and then S710 may be executed. There is no corresponding limitation in the order of the two steps.

S730: Compress the middle frame and display assembly to activate the conductive glue in the foam.

Specifically, a predetermined threshold force is applied to the middle frame and the display screen component to activate the two layers of conductive glue in the foam.

The purpose of this step is that the activated conductive glue can transfer the electricity of the display assembly to the first layer of conductive glue through the second layer of conductive glue, and the first layer of conductive glue conducts the electricity to the middle frame. The potential is zero, and electricity can be led out to achieve the electrical connection between the middle frame and the display assembly.

In the step of compressing the middle frame and the display assembly, the thickness of the foam varies with the compression process from 0.2 to 1 mm. The thickness of the foam refers to the thickness from the second surface of the first layer of conductive adhesive to The length of the second surface of the second conductive adhesive.

For example: The foam is 1 mm in the normal state. After the foam is compressed, the thickness of the foam can be in the range of 0.2-0.5 mm. In this range, the display of the display assembly will not have white spots. phenomenon. Among them, it is preferable that after compressing the foam, the thickness of the foam is 0.4 mm, and the thickness of the foam at this thickness can meet the requirements of the terminal for the thickness of the foam without affecting the display screen. Of course, when the thickness of the foam is 0.2 mm, it will not affect the display. The reason is that after the extractable parts in the foam are removed after compression, a certain space will appear, and the foam can have a certain buffering effect, so the display will not have white spots.

S740: Remove the extractable parts from the foam within a preset time after the conductive adhesive is activated.

Specifically, the withdrawable member 202 can be removed through a reserved handle.

For example, as shown in Figures 9 and 10, this figure is a schematic diagram of foam with a reserved handle. After activating the conductive adhesive, by removing the hole on the side of the middle frame, the reserved handle is removed and the extractable part 202 is extracted. .

FIG. 9 is a state of the foam seen along the direction of the top view of the terminal. The conductive frame in the foam takes a U-shaped column frame structure as an example, and the reserved handle is connected to the extractable part 202, as shown in FIG. The state of the foam seen from the direction of the side view of the terminal. It should be noted that, when the conductive frame in the foam has a U-shaped pillar frame structure, it is easy to remove the extractable member 202, which is a more preferred solution in the embodiment of the present application.

The present application also provides a terminal. The terminal may include the foams of FIGS. 2-10. The terminal may further include a middle frame and a display assembly. The middle frame is adhered to the second surface of the first layer of conductive adhesive in the foam. The display module is adhered to the second surface of the second layer of conductive adhesive in the foam. The schematic diagrams of the specific adhesion of the foam to the middle frame and the display module can be shown in FIGS. 8 to 10.

Among them, the display screen component may include a liquid crystal panel screen, a secondary silicon crystal driver, a capacitive or resistive touch screen, some hard screens, and a protective glass sheet on the panel.

In the embodiment of the present application, the manner in which the foam is adhered to the middle frame and the display screen component can be implemented by using a conductive adhesive in the foam.

The embodiment of the present application provides a foam and a terminal. By providing two layers of conductive adhesive and a drawable member between the conductive frames, the drawable member can be removed to reduce the thickness of the foam in actual use and avoid ordinary foam. Cotton causes white spots on the display due to its thickness. In addition, the foam structure provided with two layers of conductive glue can also enhance the conductive effect and achieve the electrical connection between the middle frame and the display assembly in the display area.

The above is only a specific implementation of this application, but the scope of protection of this application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in this application. It should be covered by the protection scope of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims

The method according to claim 9, before the step of adhering the second surface of the first layer of conductive adhesive in the foam to the middle frame, further comprising:

A hole is set in the middle frame, and the distance between the hole and the position where the foam is installed is within a preset range.