Back adhesive assembly and touch assembly

Abstract

The utility model discloses a back adhesive assembly which is used in a touch assembly, the touch assembly comprises a protective cover plate and a touch screen, and the touch screen is fixed on the protective cover plate in an attached mode. The back adhesive assembly comprises a release film, the release film comprises a central area, a first adhesive pasting area, a spacing area and a second adhesive pasting area, the first adhesive pasting area surrounds the central area, the spacing area surrounds the first adhesive pasting area, the second adhesive pasting area surrounds the spacing area, and the first adhesive pasting area and the second adhesive pasting area are arranged in a staggered mode. The interval area is provided with a half punching line used for separating the first rubberizing area and the second rubberizing area. The first back adhesive is arranged on the first adhesive sticking area of the release film and corresponds to an area, used for sticking and fixing a display screen, on the touch screen; and the second back adhesive is arranged on the second adhesive sticking area of the release film and corresponds to an area, which is used for sticking and fixing the terminal shell, on the protective cover plate. According to the back adhesive assembly, the frequency of attaching the back adhesive to the touch assembly can be reduced. The utility model further discloses a touch assembly which comprises the gum assembly.

Description

Technical Field

[0001] The utility model relates to a touch screen assembly technology, in particular to a back glue assembly and a touch assembly. Background Art

[0002] A touch screen, also known as a "touch screen" or "touch panel", is a human-computer interaction device that allows users to operate the host by directly touching the icons or text on the screen with their fingers or a light pen.

[0003] When assembling an existing touch screen, it needs to be first fixed to the display screen by a first adhesive, and then fixed to the terminal housing by a second adhesive. The two adhesive fixations increase the assembly process, increase labor costs, and indirectly increase product costs. Utility Model Content

[0004] In order to solve the above-mentioned deficiencies of the prior art, the utility model provides a back adhesive assembly, which can reduce the number of times the back adhesive is attached to the touch screen.

[0005] The utility model also provides a touch component, comprising the adhesive backing component.

[0006] The technical problem to be solved by the utility model is achieved through the following technical solutions:

[0007] A back adhesive component is used in a touch component, the touch component comprises a protective cover and a touch screen, the touch screen is attached and fixed to the protective cover; the back adhesive component comprises:

[0008] A release film, comprising a central area, a first adhesive area, a spacing area and a second adhesive area, wherein the first adhesive area surrounds the central area, the spacing area surrounds the first adhesive area, the second adhesive area surrounds the spacing area, and the spacing area is provided with a half-punching line for separating the first adhesive area and the second adhesive area;

[0009] A first adhesive backing, which is arranged on a first adhesive bonding area of ​​the release film and corresponds to an area on the touch screen for bonding and fixing the display screen;

[0010] The second back adhesive is arranged on the second adhesive area of ​​the release film, corresponding to the area on the protective cover plate used for bonding and fixing the terminal housing.

[0011] Furthermore, one of the first adhesive backing and the second adhesive backing is a double-sided foam adhesive.

[0012] Furthermore, the thickness of the first adhesive backing is not less than the thickness of the second adhesive backing.

[0013] Furthermore, the thickness of the first adhesive backing is between 0.4-0.6 mm, and the thickness of the second adhesive backing is between 0.2-0.6 mm.

[0014] Furthermore, the half-punching line includes a plurality of cutting lines and a plurality of connecting points which are sequentially arranged at intervals around the first glue-applied area, and the first glue-applied area and the second glue-applied area are disconnected at the cutting lines and connected at the connecting points.

[0015] Furthermore, the length of each of the connection points is between 0.10-0.15 mm.

[0016] Furthermore, a hollow area is provided in the spacing area, and the hollow area corresponds to the binding area of ​​the touch screen.

[0017] Furthermore, a film-tearing handle is provided on one side of the second adhesive backing area.

[0018] Furthermore, the central area of ​​the release film is a hollow structure.

[0019] A touch component comprises a protective cover, a touch screen and the above-mentioned adhesive component, wherein the first adhesive of the adhesive component is adhered to the touch screen and corresponds to the area on the touch screen used for adhering and fixing the display screen, and the second adhesive of the adhesive component is adhered to the protective cover and corresponds to the area on the protective cover used for adhering and fixing the terminal housing.

[0020] The utility model has the following beneficial effects: the adhesive backing component of the utility model integrates the first adhesive backing and the second adhesive backing that respectively adhere and fix the touch component to the display screen and the terminal housing during assembly on the same release film; after alignment and adhesion with the touch component during assembly, the first adhesive backing and the second adhesive backing can be aligned and adhered to the touch component at the same time, thereby reducing the number of times the adhesive backing is adhered to the touch component. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the stacking structure of the touch assembly provided by the utility model.

[0022] Figure 2 for Figure 1 A schematic diagram of the planar structure of a protective cover plate in a touch assembly is shown.

[0023] Figure 3 for Figure 1 A schematic diagram of the planar structure of the touch screen in the touch assembly is shown.

[0024] Figure 4 The utility model is provided for the stacking structure of the adhesive backing assembly.

[0025] Figure 5 for Figure 4 The planar structure of the release film in the adhesive backing assembly is shown.

[0026] Figure 6 This is a schematic diagram of the use of the laminating jig provided by the utility model.

[0027] Figure 7 This is a schematic diagram of the stacking structure of another touch assembly provided by the utility model. DETAILED DESCRIPTION

[0028] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments, examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0029] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "set" and the like 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 connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Embodiment 1

[0033] like Figure 1-3As shown, a touch component includes a protective cover plate 1 and a touch screen 2, wherein the protective cover plate 1 includes a visible area 11 and a frame area 12, wherein the frame area 12 surrounds the visible area 11, and the frame area 12 further includes a frame inner area 211 and a frame outer area 212, wherein the frame outer area 212 surrounds the frame inner area 211; the touch screen 2 includes a sensing electrode area 21 and a peripheral wiring area 22, wherein the peripheral wiring area 22 surrounds the sensing electrode area 21; the touch screen 2 is bonded and fixed to the protective cover plate 1 by OCA optical adhesive 3, wherein the sensing electrode area 21 of the touch screen 2 corresponds to the visible area 11 of the protective cover plate 1, and the peripheral wiring area 22 of the touch screen 2 corresponds to the frame inner area 211 of the protective cover plate 1; wherein the frame outer area 212 of the protective cover plate 1 is an area on the touch component used for bonding and fixing a terminal housing, and the peripheral wiring area 22 of the touch screen 2 is an area on the touch component used for bonding and fixing a display screen.

[0034] like Figure 4 and 5 As shown, a back adhesive component 4, used in the above touch component, includes:

[0035] The release film 41 includes a central area 411, a first adhesive area 412, a spacing area 413 and a second adhesive area 414, wherein the first adhesive area 412 surrounds the outside of the central area 411, the spacing area 413 surrounds the outside of the first adhesive area 412, and the second adhesive area 414 surrounds the outside of the spacing area 413, and the spacing area 413 is provided with a half-punching line 415 for separating the first adhesive area 412 and the second adhesive area 414;

[0036] A first adhesive backing 42 is disposed on a first adhesive region 412 of the release film 41 and corresponds to a region on the touch screen 2 for bonding and fixing the display screen;

[0037] The second adhesive 43 is disposed on the second adhesive region 414 of the release film 41 , corresponding to the region on the protective cover 1 for attaching and fixing the terminal housing.

[0038] The adhesive backing component 4 of the utility model integrates the first adhesive backing 42 and the second adhesive backing 43 which are respectively adhered and fixed to the display screen and the terminal housing during assembly on the same release film 41. After being aligned and adhered to the touch component during assembly, the first adhesive backing 42 and the second adhesive backing 43 can be aligned and adhered to the touch component at the same time, thereby reducing the number of times the adhesive backing is adhered to the touch component.

[0039] When fitting, Figure 6As shown, the bonding jig 5 includes a jig lower mold 51 and a jig upper mold 52 which are arranged relatively to each other. The jig lower mold 51 is provided with a positioning groove for placing the touch component and the adhesive backing component 4 on the side facing the jig upper mold 52, and the jig upper mold 52 adopts a step structure on the side facing the jig lower mold 51, that is, the jig upper mold 52 adopts a structure with a concave middle and a convex periphery. When the jig upper mold 52 is covered on the jig lower mold 51, the middle of the jig upper mold 52 presses the first glue area 412 of the release film 41 and the first adhesive 42 located on the first glue area 412 toward the peripheral wiring area 22 of the touch screen 2, and the periphery of the jig upper mold 52 presses the second glue area 414 of the release film 41 and the second adhesive 43 located on the second glue area 414 toward the outer area 212 of the frame of the protective cover 1. At this time, since the middle of the jig upper mold 52 is concave and the periphery is convex, the jig upper mold 52 forms a pulling force on the first glue area 412 and the second glue area 414, so that the first glue area 412 and the second glue area 414 are separated at the half-punching line 415, and then the first adhesive 42 and the second adhesive 43 are respectively adhered to the peripheral wiring area 22 of the touch screen 2 and the outer area 212 of the frame of the protective cover 1.

[0040] In this embodiment, one of the first adhesive backing 42 and the second adhesive backing 43 is a foam double-sided adhesive. Preferably, both the first adhesive backing 42 and the second adhesive backing 43 are foam double-sided adhesive.

[0041] The foam double-sided adhesive is composed of a foam base material and an adhesive layer. The foam base material includes EVA foam, PE foam, PU foam, acrylic foam, etc., and the adhesive layer is divided into oil adhesive, hot melt adhesive, rubber and acrylic adhesive, etc. The foam double-sided adhesive has the characteristics of strong adhesion, good holding power, good waterproof performance, strong temperature resistance and strong UV protection.

[0042] In this embodiment, one of the first adhesive backing 42 and the second adhesive backing 43 is a black foam double-sided adhesive. Preferably, both the first adhesive backing 42 and the second adhesive backing 43 are black foam double-sided adhesive.

[0043] The black foam double-sided adhesive tape not only plays the role of ordinary foam double-sided adhesive tape, but also has a light-shielding effect, which can prevent external light from leaking in from the bonding gap and also prevent display light from leaking out from the bonding gap.

[0044] The thickness of the first adhesive backing 42 is not less than the thickness of the second adhesive backing 43 . Specifically, the thickness of the first adhesive backing 42 is between 0.4 mm and 0.6 mm, and the thickness of the second adhesive backing 43 is between 0.2 mm and 0.6 mm.

[0045] The half-punching line 415 includes a plurality of cutting lines 415a and a plurality of connecting points 415b which are arranged in sequence and spaced apart around the first glue-applied area 412. The first glue-applied area 412 and the second glue-applied area 414 are disconnected at the cutting lines 415a and connected at the connecting points 415b.

[0046] The semi-punching line 415 can be made by a punching mold, and the spacing area 413 of the release film 41 is partially punched by the punching mold. There are multiple punching positions, and the multiple punching positions are surrounded by the first glue area 412, and there are non-punching positions between adjacent punching positions. The punching positions correspond to the cutting points of the semi-punching lines 415, and the non-punching positions correspond to the connection points 415b of the semi-punching lines 415.

[0047] Preferably, the half punching line 415 is arranged on the periphery of one side of the spacing area 413 close to the second glue-applying area 414 .

[0048] In this embodiment, the length of each connection point 415b is between 0.10-0.15mm, so as to ensure that the pulling force generated when the laminating jig 5 is pressed can break each connection point 415b.

[0049] Preferably, a film-tearing handle 417 is provided on one side of the second adhesive backing 43 area to facilitate film tearing.

[0050] Preferably, a hollow area 416 is provided in the spacing area 413, and the hollow area 416 corresponds to the binding area 23 of the touch screen 2, so that after the adhesive backing component 4 and the touch component are attached, the binding area 23 of the touch screen 2 is exposed, which facilitates the binding area 23 and the flexible circuit board 24 to be bound.

[0051] In this embodiment, the central area 411 of the release film 41 is a hollow structure. Of course, the central area 411 may not be hollowed out, and the film layer covering the touch electrode area 21 may be retained.

[0052] Embodiment 2

[0053] like Figure 7 As shown, a touch component includes a protective cover plate 1, a touch screen 2 and the adhesive component 4 described in Example 1, the first adhesive 42 of the adhesive component 4 is adhered to the touch screen 2 and corresponds to the area on the touch screen 2 used to adhere and fix the display screen, the second adhesive 43 of the adhesive component 4 is adhered to the protective cover plate 1 and corresponds to the area on the protective cover plate 1 used to adhere and fix the terminal housing.

[0054] like Figure 2 and3 As shown, the protective cover plate 1 includes a visible area 11 and a frame area 12, wherein the frame area 12 surrounds the visible area 11, and the frame area 12 further includes a frame inner area 211 and a frame outer area 212, wherein the frame outer area 212 surrounds the frame inner area 211; the touch screen 2 includes a sensing electrode area 21 and a peripheral wiring area 22, wherein the peripheral wiring area 22 surrounds the sensing electrode area 21; the touch screen 2 is bonded and fixed to the protective cover plate 1 by OCA optical adhesive 3, wherein the sensing electrode area 21 of the touch screen 2 corresponds to the visible area 11 of the protective cover plate 1, and the peripheral wiring area 22 of the touch screen 2 corresponds to the frame inner area 211 of the protective cover plate 1; wherein the frame outer area 212 of the protective cover plate 1 is an area for bonding and fixing the terminal housing, and the peripheral wiring area 22 of the touch screen 2 is an area for bonding and fixing the display screen.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the utility model rather than to limit them. Although the embodiments of the utility model are described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the embodiments of the utility model can still be modified or replaced by equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A back adhesive component, used in a touch component, the touch component comprising a protective cover and a touch screen, the touch screen being fixedly attached to the protective cover; characterized in that: The adhesive backing assembly comprises: A release film, comprising a central area, a first adhesive area, a spacing area and a second adhesive area, wherein the first adhesive area surrounds the central area, the spacing area surrounds the first adhesive area, the second adhesive area surrounds the spacing area, and the spacing area is provided with a half-punching line for separating the first adhesive area and the second adhesive area; A first adhesive backing, which is arranged on a first adhesive bonding area of ​​the release film and corresponds to an area on the touch screen for bonding and fixing the display screen; The second back adhesive is arranged on the second adhesive area of ​​the release film, corresponding to the area on the protective cover plate used for bonding and fixing the terminal housing.

2. The adhesive backing assembly according to claim 1, characterized in that: One of the first adhesive backing and the second adhesive backing is a foam double-sided adhesive.

3. The adhesive backing assembly according to claim 1, characterized in that: The thickness of the first adhesive backing is not less than the thickness of the second adhesive backing.

4. The adhesive backing assembly according to claim 3, characterized in that: The thickness of the first back adhesive is between 0.4-0.6 mm, and the thickness of the second back adhesive is between 0.2-0.6 mm.

5. The adhesive backing assembly according to claim 1, characterized in that: The half-punching line includes a plurality of cutting lines and a plurality of connecting points which are sequentially arranged at intervals around the first glue-applying area. The first glue-applying area and the second glue-applying area are disconnected at the cutting lines and connected at the connecting points.

6. The adhesive backing assembly according to claim 5, characterized in that: The length of each connection point is between 0.10-0.15 mm.

7. The adhesive backing assembly according to claim 1, characterized in that: A hollow area is provided in the spacing area, and the hollow area corresponds to the binding area of ​​the touch screen.

8. The adhesive backing assembly according to claim 1, characterized in that: The central area of ​​the release film is a hollow structure.

9. The adhesive backing assembly according to claim 1, characterized in that: A film-tearing handle is provided on one side of the second adhesive backing area.

10. A touch component, characterized in that: It includes a protective cover, a touch screen and the adhesive assembly as described in claim 1, wherein the first adhesive of the adhesive assembly is adhered to the touch screen and corresponds to the area on the touch screen used to adhere and fix the display screen, and the second adhesive of the adhesive assembly is adhered to the protective cover and corresponds to the area on the protective cover used to adhere and fix the terminal housing.

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