Back glue structure and front shell assembly

Abstract

The invention belongs to the field of electronic equipment accessories, and discloses a gum structure and a front shell assembly, the gum structure comprises a release layer and a gum layer, the release layer comprises a first release film and a second release film which are connected with each other and located on the same layer, the second release film is arranged around the first release film, and the gum layer is arranged around the first release film. A tearing line is arranged between the first release film and the second release film along the appearance of the first release film; the back adhesive layer is adhered to the second release film. The first release film and the second release film are arranged on the release layer, and the first release film and the second release film are connected through the tearing line, so that when the NFC antenna is installed, the first release film and the second release film are torn off, the back adhesive layer is still protected, and the viscosity of the back adhesive layer is not influenced; therefore, the situation that the screen module and the back glue are not firmly attached due to the fact that the back glue layer is polluted is avoided, the bonding strength of the screen module and the front shell is improved, it can be avoided that water vapor enters and influences the function of the screen module, and the problem that the screen module warps or falls off can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of electronic equipment accessories, in particular to a back glue structure and a front shell component. Background Art

[0002] NFC (Near Field Communication) is a technology that enables data exchange between devices through short-range wireless communication. It allows two NFC-enabled devices to quickly connect and interact when they are close to each other, usually within a few centimeters, and is convenient, fast, and safe.

[0003] The NFC antenna under the screen needs to be assembled on the front shell under the display screen, and the display screen is fixed to the front shell by the adhesive backing. The adhesive backing and the front shell are usually bonded together in the mold factory. In order to prevent the adhesive backing from getting dirty during the bonding process and transportation process, which affects the adhesion, a protective film, i.e., a release layer, will be set on the adhesive backing when the mold factory leaves the factory. The NFC antenna is generally assembled in the assembly plant because the assembly plant has equipment to test the antenna performance. When assembling in the assembly plant, the protective film on the adhesive backing needs to be torn off first, and then the NFC antenna is bonded. During the NFC bonding process, the adhesive backing is not protected, and it is easy for employees to touch the adhesive backing during operation, which affects the viscosity of the adhesive backing, making the display screen and the adhesive backing not firmly bonded. After reliability testing or after customers use it for a period of time, not only will there be problems with water vapor entering the device and affecting the function of the display screen, but the display screen may also warp or fall off. Summary of the invention

[0004] The purpose of this application is to provide a back adhesive structure and a front shell assembly, which not only facilitates the installation of the NFC antenna, but also does not affect the fitting strength between the screen module and the front shell.

[0005] The technical solutions provided by this application are as follows:

[0006] On the one hand, a back adhesive structure is provided, comprising:

[0007] A release layer, the release layer comprising a first release film and a second release film which are connected to each other and located on the same layer, the second release film being arranged around the first release film, and a tear line being arranged between the first release film and the second release film along the shape of the first release film;

[0008] The back adhesive layer is adhered to the second release film.

[0009] In some embodiments, the adhesive backing layer is a frame-shaped structure, and the adhesive backing layer is disposed around the first release film.

[0010] In some embodiments, the first release film has the same shape and size as the NFC antenna.

[0011] In some embodiments, a projection of the NFC antenna on the first release film is located within the region of the first release film.

[0012] In some embodiments, the first release film is provided with a first opening, and the first opening forms a tearing portion of the first release film.

[0013] In some embodiments, a second opening is provided in an area of ​​the second release film outside the adhesive layer, and the second opening forms a tearing portion of the second release film.

[0014] On the other hand, a front shell assembly is also provided, comprising a front shell and the adhesive backing structure described in any one of the above embodiments, wherein a side of the adhesive backing layer away from the release layer is adhered to the front shell.

[0015] In some embodiments, an NFC antenna installation area is provided on the front shell, and the first release film faces the NFC antenna installation area.

[0016] In some embodiments, the front shell includes a side panel, and the adhesive layer is adhered to the front side of the side panel.

[0017] In some embodiments, the inner side wall of the side plate is provided with a first recessed portion.

[0018] The technical effect of the present application is that: a first release film and a second release film are arranged on the release layer, and the first release film and the second release film are connected by a tear line. When the NFC antenna is installed, the first release film is torn off, and the second release film still protects the back adhesive layer, and will not affect the viscosity of the back adhesive layer, so as to avoid the screen module and the back adhesive from being contaminated, thereby improving the bonding strength between the screen module and the front shell, which can not only prevent water vapor from entering and affecting the function of the screen module, but also prevent the screen module from warping or falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present application is further described in detail below with reference to the accompanying drawings and specific implementation methods:

[0020] Figure 1 It is an exploded schematic diagram of the front housing assembly and the screen module provided in an embodiment of the present application;

[0021] Figure 2 is a schematic diagram of the structure of a release layer provided in an embodiment of the present application;

[0022] Figure 3 is an exploded schematic diagram of a release layer provided in an embodiment of the present application;

[0023] Figure 4 is a schematic structural diagram of the front shell provided in an embodiment of the present application;

[0024] Figure 5 It is a schematic diagram of the structure in which a backing adhesive layer and an NFC antenna are installed on a front shell provided in an embodiment of the present application.

[0025] Description of Figure Numbers:

[0026] 100, release layer; 110, first release film; 111, first opening; 120, second release film; 121, second opening; 130, tear line;

[0027] 200, adhesive layer; 300, front shell; 310, bottom plate; 320, side plate; 321, first recessed portion; 400, NFC antenna; 500, screen module. DETAILED DESCRIPTION

[0028] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0029] In order to more clearly illustrate the application embodiments or technical solutions in the prior art, the specific implementation methods of the present application will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0030] In order to simplify the drawings, only the parts related to the present application are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0031] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0032] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] In the embodiments shown in the drawings, directional indications (such as up, down, left, right, front, and back, etc.) are not absolute but relative when describing the structure and movement of each component, and are not used to limit the direction of the product in actual use.

[0034] In addition, in the description of the present application, ordinal numbers, such as "first", "second", etc., are only used to distinguish and describe related objects, and cannot be understood as indicating or implying the relative importance or order between the related objects.

[0035] like Figures 1 to 3 As shown, in one or more embodiments, the present disclosure provides a back-adhesive structure, which includes a release layer 100 and a back-adhesive layer 200, the release layer 100 includes a first release film 110 and a second release film 120 that are interconnected and located on the same layer, the second release film 120 is arranged around the first release film 110, and a tear line 130 is provided between the first release film 110 and the second release film 120 along the shape of the first release film 110; the back-adhesive layer 200 is adhered to the second release film 120.

[0036] The adhesive back structure in at least one embodiment of the present application is applied to the assembly process of electronic devices such as mobile phones, tablet computers, e-readers, wearable devices, POS machines, and laptop computers. The front shell 300 of the electronic device is produced in a mold factory, and the installation of the NFC antenna 400 and the assembly of the front shell 300 and the screen module 500 are completed in the assembly plant. The front shell 300 is attached with the adhesive back structure in this embodiment when it leaves the mold factory. The adhesive back structure covers the entire front side of the front shell, wherein the release layer 100 of the adhesive back structure protects the adhesive back layer 200 and facilitates the adhesive back structure to be attached to the front shell 300. The adhesive back layer 200 is used to fix the screen module 500 on the front shell 300.

[0037] The adhesive backing structure of the present embodiment includes a release layer 100 and a adhesive backing layer 200. The release layer 100 is a whole-surface release film or release paper. The whole-surface release film or release paper is arranged on the adhesive backing layer 200, which can not only protect the adhesive backing layer 200 and prevent the adhesive backing layer 200 from being contaminated and affecting the viscosity, but also improve the hardness of the entire adhesive backing structure, so as to facilitate the picking and grasping of the adhesive backing structure, and then facilitate the adhesive backing structure to be attached to the front shell 300, thereby improving production efficiency and attachment accuracy and reducing attachment difficulty.

[0038] The release layer 100 includes a first release film 110 and a second release film 120. The first release film 110 and the second release film 120 are located at the same level, and the first release film 110 and the second release film 120 together form a whole release layer. In this embodiment, the thickness of the first release film 110 and the second release film 120 is not limited, and the thickness of the first release film 110 and the second release film 120 can be the same or different. A tear line 130 is set between the first release film 110 and the second release film 120. The design of the tear line 130 refers to presetting some specific cutting lines or half-cutting lines on the release layer 100, so that the release film on the tear line 130 is easier to tear, but these lines will not completely cut off the release film, thereby ensuring that the two release films remain connected when they do not need to be torn. That is, when the first release film 110 is not torn off, the first release film 110 and the second release film 120 in this embodiment are connected together by the tear line 130, and the first release film 110 and the second release film 120 are easier to separate. When the first release film 110 is torn off, the second release film 120 will not be torn off as well, and the second release film 120 can continue to protect the back adhesive layer 200.

[0039] The second release film 120 is arranged around the first release film 110, and the adhesive layer 200 is adhered to the second release film 120. The first release film 110 is not provided with an adhesive layer. After the first release film 110 is torn off, an opening is formed in the region of the release layer 100 located at the first release film 110, and the opening can facilitate the installation of the NFC antenna 400 on the front shell 300. Because a tearing line 130 is provided between the first release film 110 and the second release film 120, when the first release film 110 is torn off, the second release film 120 will not be torn off, so that the second release film 120 can still protect the adhesive layer 200. After tearing off the first release film 110, the area on the front shell 300 corresponding to the first release film 110 is exposed, and the NFC antenna 400 can be installed in the exposed area. The NFC antenna 400 can be attached to the front shell 300 through its own adhesive or an additional adhesive. At this time, the second release film 120 can still completely protect the adhesive layer 200 to prevent the adhesive layer 200 from being contaminated. After attaching the NFC antenna 400, when the screen module 500 needs to be attached, the second release film 120 is torn off to attach the screen module 500, so as to avoid the screen module 500 and the adhesive layer 200 being contaminated, resulting in a loose attachment of the screen module 500 and the adhesive layer, thereby improving the bonding strength between the screen module 500 and the front shell 300, which can not only prevent water vapor from entering and affecting the function of the screen module 500, but also prevent the screen module 500 from warping or falling off.

[0040] In some embodiments, Figure 1 As shown, the adhesive layer 200 is a frame-shaped structure, and the adhesive layer 200 is arranged around the first release film 110. In this embodiment, the adhesive layer 200 is a closed frame-shaped structure, so that the entire circle of the front shell 300 can be provided with adhesive to improve the bonding strength between the screen module 500 and the front shell 300, which not only prevents the screen module 500 from warping, enhances the structural stability and durability of the screen module 500, but also provides better dust and moisture protection.

[0041] In some embodiments, the shape and size of the first release film 110 are the same as those of the NFC antenna 400. After the adhesive backing structure is installed on the front shell 300, the projection of the first release film 110 on the front shell 300 coincides with the NFC antenna installation area on the front shell 300. After the first release film 110 is torn off, the NFC antenna installation area on the front shell 300 is exposed. The shape and size of the NFC antenna 400 are the same as those of the first release film 110. The NFC antenna 400 can be passed through the hollow area after the first release film 110 is torn off, and the NFC antenna 400 can be installed in the NFC antenna installation area on the front shell 300. This not only realizes the installation of the NFC antenna 400, but also prevents the release film on the adhesive backing layer 200 from being contaminated due to being torn off.

[0042] In some other embodiments, the projection of the NFC antenna 400 on the first release film 110 is located within the area of ​​the first release film 110, that is, the size of the first release film 110 is larger than the size of the NFC antenna 400. After the first release film 110 is torn off, the NFC antenna 400 can be conveniently installed from the hollow area after the first release film 110 is torn off, further improving the convenience of installation of the NFC antenna 400. In this embodiment, the shape and specific size of the first release film 110 are not limited. The shape of the first release film 110 can be the same as that of the NFC antenna 400, or different from that of the NFC antenna 400, as long as the convenient installation of the NFC antenna 400 can be achieved, and the first release film 110 can be any shape, for example, circular, rectangular, elliptical or other regular or irregular shapes. The size of the first release film 110 can be set according to the size of the NFC antenna 400 and the size of the adhesive layer 200. It is necessary to ensure that the size of the first release film 110 is larger than the size of the NFC antenna 400 to facilitate the installation of the NFC antenna 400. At the same time, the size of the first release film 110 cannot be larger than the inner frame size of the adhesive layer 200 to avoid partial exposure of the adhesive layer 200 and contamination after the first release film 110 is torn, thereby affecting the viscosity of the adhesive layer 200.

[0043] In some embodiments, Figure 2 and Figure 3 As shown, the first release film 110 is provided with a first opening 111, and the first opening 111 forms a tearing portion of the first release film 110. The first opening 111 penetrates the first release film 110 along the thickness direction of the first release film 110. The first opening 111 is provided on the first release film 110 to form a tearing portion, so that the operator can easily tear off the first release film 110, thereby improving the operation efficiency. Furthermore, the first opening 111 penetrates to the edge of the first release film 110, that is, the first opening 111 penetrates to the tearing line 130 between the first release film 110 and the second release film 120, so that the first release film 110 can be torn apart more conveniently along the tearing line 130, thereby further improving the operation efficiency.

[0044] In some embodiments, Figure 2 and Figure 3 As shown, a second opening 121 is provided in an area outside the adhesive layer 200 on the second release film 120, and the second opening 121 forms a tearing portion of the second release film 120. The second opening 121 is provided on the second release film 120 to form a tearing portion on the second release film 120, which can facilitate tearing of the second release film 120. The second opening 121 is located in an area outside the adhesive layer 200, which can prevent the adhesive layer 200 from being exposed and contaminated.

[0045] like Figure 1As shown, in one or more embodiments, the present application further provides a front shell assembly, including a front shell 300 and a back glue structure in any of the above embodiments, and the back glue layer 200 is adhered to the front shell on a side away from the release layer 100. The back glue layer 200 enables the front shell 300 to be adhered to the screen module 500.

[0046] The front shell component of this embodiment can be applied to electronic devices such as mobile phones, tablet computers, e-readers, wearable devices, POS machines, and laptop computers. The front shell component includes a front shell 300 and a back glue structure when it leaves the mold factory, and the back glue structure is attached to the front shell 300. When the NFC antenna 400 and the screen module 500 are assembled in the assembly plant, the first release film 110 is first torn off from the tear line 130, and the NFC antenna 400 is installed on the front shell 300 from the hollow area after the first release film 110 is torn off. The remaining second release film 120 can also completely protect the back glue layer 200 to prevent the back glue layer 200 from being contaminated. After the NFC antenna 400 is attached, the second release film 120 is torn off when the screen module 500 is attached, and the screen module 500 is attached to the front shell 300 through the back glue layer 200.

[0047] In some embodiments, the front shell 300 is provided with an NFC antenna installation area, and the first release film 110 is opposite to the NFC antenna installation area. The first release film 110 is opposite to the NFC antenna installation area on the front shell 300. After the first release film 110 is torn off, it is convenient to install the NFC antenna 400, thereby improving the installation efficiency. In addition, a positioning column can be further provided on the front shell 300, and the installation of the NFC antenna 400 is positioned by the positioning column to improve the installation accuracy of the NFC antenna 400.

[0048] In some embodiments, Figure 4 and Figure 5 As shown, the front shell 300 includes a bottom plate 310 and a side plate 320, the side plate 320 is arranged around the bottom plate 310, and the adhesive layer 200 is adhered to the front of the side plate 320 to adhere the screen module 500 to the front of the front shell 300. The inner side wall of the side plate 320 is provided with a first recessed portion 321 for installing the edge area of ​​the NFC antenna 400, the edge area of ​​the NFC antenna 400 is adhered to the first recessed portion 321 of the side plate 320 by adhesive, the middle area of ​​the NFC antenna 400 is adhered to the bottom plate 310 of the front shell 300, and the positioning column for positioning the NFC antenna 400 is arranged on the bottom plate 310 of the front shell 300, so as to facilitate the positioning and installation of the NFC antenna 400.

[0049] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0050] It should be noted that the above embodiments can be freely combined as needed. The above is only the preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present application, and these improvements and modifications should also be regarded as the protection scope of the present application.

Claims

1. A back adhesive structure, characterized in that: include: A release layer, the release layer comprising a first release film and a second release film which are connected to each other and located on the same layer, the second release film being arranged around the first release film, and a tear line being arranged between the first release film and the second release film along the shape of the first release film; The back adhesive layer is adhered to the second release film.

2. The adhesive backing structure according to claim 1, characterized in that: The adhesive backing layer is a frame-shaped structure, and the adhesive backing layer is arranged around the first release film.

3. The adhesive backing structure according to claim 1, characterized in that: The shape and size of the first release film are the same as those of the NFC antenna.

4. The adhesive backing structure according to claim 1, characterized in that: The projection of the NFC antenna on the first release film is located within the area of ​​the first release film.

5. The adhesive backing structure according to any one of claims 1 to 4, characterized in that: The first release film is provided with a first opening, and the first opening forms a tearing portion of the first release film.

6. A back adhesive structure according to any one of claims 1 to 4, characterized in that: A second opening is provided on the second release film in an area outside the adhesive layer, and the second opening forms a tearing portion of the second release film.

7. A front housing assembly, characterized in that: It comprises a front shell and the adhesive backing structure according to any one of claims 1 to 6, wherein a side of the adhesive backing layer away from the release layer is adhered to the front shell.

8. A front housing assembly according to claim 7, characterized in that: An NFC antenna installation area is provided on the front shell, and the first release film faces the NFC antenna installation area.

9. A front housing assembly according to claim 7, characterized in that: The front shell includes a side plate, and the adhesive layer is adhered to the front side of the side plate.

10. A front housing assembly according to claim 9, characterized in that: The inner side wall of the side plate is provided with a first recessed portion.

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