Film plug-in structure and narrow-frame touch screen structure

Abstract

The utility model discloses a film plugging structure comprising a film base film which comprises a wiring part and a pin part which are connected with each other. The film plug-in structure further comprises a plurality of copper foil strips arranged on the surface of one side of the film base film at equal intervals, and each copper foil strip comprises a copper foil wire located on the wiring part and a copper foil pin located on the pin part. And a nickel-gold plating layer is arranged on the surface of one side, back on to the film base film, of each copper foil pin. The film plugging structure has relatively high plugging stability. The utility model further discloses a narrow-frame touch screen structure which comprises the film plug-in structure.

Description

Technical Field

[0001] The utility model relates to a touch technology, in particular to a film plug-in structure and a narrow-frame touch screen structure. Background Art

[0002] The existing touch screen needs to be connected to the terminal main board through a flexible circuit board, so it is necessary to reserve enough space on the frame area to bind with the flexible circuit board, which results in a larger frame area of ​​the touch screen.

[0003] In order to achieve a narrow frame of the touch screen, some manufacturers began to extend a plug-in structure directly from the edge of the main body of the touch film to replace the flexible circuit board to connect with the terminal mainboard. For example, the Chinese patent with patent number CN202320679295.4 discloses a film plug-in structure, including: a base film; a conductive component, the conductive component includes a plurality of silver paste strips and a plurality of carbon paste strips, each of the silver paste strips is equidistantly arranged on one side of the base film, each of the carbon paste strips is arranged on the base film, and each of the carbon paste strips is covered on a partial structure of each of the silver paste strips in a one-to-one correspondence; and an insulating film, the insulating film is arranged on the base film so that the insulating film covers the partial structure of the carbon paste strips, and the insulating film covers the silver paste strips.

[0004] However, the material of the carbon paste strip is relatively soft and has poor bonding strength with the silver paste strip. The touch screen needs to undergo multiple tests before leaving the factory, which requires multiple plugging of the film plugging structure. After multiple plugging of the film plugging structure, the carbon paste strip is prone to damage and falling off, and has poor stability. Utility Model Content

[0005] In order to solve the above-mentioned deficiencies in the prior art, the utility model provides a film plug-in structure with higher plug-in stability.

[0006] A narrow-frame touch screen structure comprises the above-mentioned film plug-in structure.

[0007] The technical problem to be solved by the utility model is achieved through the following technical solutions:

[0008] A film plug-in structure comprises a film base film, wherein the film base film comprises a wiring portion and a pin portion connected to each other; the film plug-in structure also comprises a plurality of copper foil strips equidistantly arranged on a surface of one side of the film base film, each of the copper foil strips comprises a copper foil wiring located on the wiring portion and a copper foil pin located on the pin portion, wherein each of the copper foil pins is provided with a nickel-gold plating layer on a surface on a side facing away from the film base film.

[0009] Furthermore, an insulating layer is provided on the surface of each copper foil trace facing away from the film base film.

[0010] Furthermore, the insulating layer is also provided on the wiring portion of the film base film exposed between each of the copper foil wirings.

[0011] Furthermore, the insulating layer is insulating ink.

[0012] Furthermore, a reinforcing layer is provided on the surface of the lead portion of the film base film on a side facing away from each of the copper foil leads.

[0013] Furthermore, the reinforcing layer is a PI film or a PET film.

[0014] Furthermore, an elastic layer is provided on a surface of the wiring portion of the film base film on a side facing away from each of the copper foil wirings.

[0015] Furthermore, the elastic layer is a rubber film or a silicone film.

[0016] A narrow-frame touch screen structure includes a first touch film, an adhesive layer and a second touch film, wherein the first touch film and the second touch film are relatively bonded and fixed by the adhesive layer; at least one of the first touch film and the second touch film extends outward from the above-mentioned film plug-in structure.

[0017] Furthermore, the first touch film includes a first film base film and a plurality of first ITO electrodes, the first film base film includes a first film body, and each of the first ITO electrodes is arranged on a side surface of the first film body; the second touch film includes a second film base film and a plurality of second ITO electrodes, the second film base film includes a second film body, and each of the second ITO electrodes is arranged on a side surface of the second film body; at least one of the first film body and the second film body extends outwardly from the routing portion and the pin portion of the film plug-in structure, and at least one of each of the first ITO electrodes and each of the second ITO electrodes is correspondingly connected to each of the copper foil routings of the film plug-in structure. The utility model has the following beneficial effects: the film plug-in structure of the utility model adopts copper foil pins + nickel-gold plating to form plug-in pins. Compared with the solution of using silver paste strips + carbon paste strips to form plug-in pins in the prior art, the copper foil pins have higher hardness, better supporting ability, and better bonding with the nickel-gold plating. Nickel plating on the copper foil pins can increase the wear resistance of the plug-in pins, reduce the risk of damage and falling off of the nickel-gold plating after multiple plug-ins, and improve product stability. Gold plating on the copper foil pins can increase the conductivity of the plug-in pins and improve the electrical connection effect after plug-in. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front structural schematic diagram of the film plug-in structure provided by the utility model.

[0019] Figure 2 for Figure 1 The cross-sectional structure schematic diagram of the film plug-in structure at AA is shown.

[0020] Figure 3 for Figure 1 The cross-sectional structure schematic diagram of the film plug-in structure at BB is shown.

[0021] Figure 4 This is a schematic diagram of the exploded structure of the narrow-frame touch screen structure provided by the utility model. DETAILED DESCRIPTION

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] Embodiment 1

[0027] like Figure 1-3 As shown, a film plug-in structure includes a film base film 10, wherein the film base film 10 includes a wiring portion 11 and a pin portion 12 connected to each other; the film plug-in structure also includes a plurality of copper foil strips 20 equidistantly arranged on one side surface of the film base film 10, each of the copper foil strips 20 includes a copper foil wiring 21 located on the wiring portion 11 and a copper foil pin 22 located on the pin portion 12, wherein each of the copper foil pins 22 is provided with a nickel-gold plating layer 30 on a side surface facing away from the film base film 10.

[0028] The film plug-in structure of the utility model adopts copper foil pins 22 + nickel-gold plating 30 to form plug-in pins. Compared with the solution of using silver paste strips + carbon paste strips to form plug-in pins in the prior art, the copper foil pins 22 have higher hardness, better supporting ability, and better bonding with the nickel-gold plating 30. Nickel plating on the copper foil pins 22 can increase the wear resistance of the plug-in pins, reduce the risk of damage and falling off of the nickel-gold plating 30 after multiple plug-ins during touch screen testing, and improve product stability. Gold plating on the copper foil pins 22 can increase the conductivity of the plug-in pins and improve the electrical connection effect after plugging.

[0029] In this embodiment, the film base film 10 is a PI film or a PET film.

[0030] It should be noted that the film base film 10, the copper foil strips 20 and the nickel-gold plating layer 30 are arranged in sequence from bottom to top. Specifically, each of the copper foil strips 20 is equidistantly arranged on the film base film 10, and the number is preferably between 2 and 16, wherein one end of each of the copper foil strips 20 extends to the edge of one end of the routing portion 11 away from the pin portion 12, and the other end extends to the edge of one end of the pin portion 12 away from the routing portion 11; the portion of each of the copper foil strips 20 on the routing portion 11 forms the copper foil routing 21, and the portion on the pin portion 12 forms the copper foil pin 22. In order to increase the electrical connection area of ​​the copper foil pin 22 after plugging, the width of the copper foil pin 22 can be larger than the width of the copper foil routing 21.

[0031] During preparation, a layer of complete copper foil is first plated on the film base film 10, and then a layer of completed nickel-gold is plated on the copper foil, and then the copper foil and the nickel-gold are etched at the same time to form the copper foil trace 21 and the copper foil pin 22, and the nickel-gold plating 30 located on the copper foil pin 22; the nickel-gold plating 30 on the copper foil trace 21 can be retained or removed.

[0032] An insulating layer 40 is provided on the surface of each copper foil trace 21 facing away from the film base film 10. It should be noted that after the insulating layer 40 covers each copper foil trace 21, it can prevent each copper foil trace 21 from contacting and conducting with other components of the terminal device, so as to prevent each copper foil trace 21 from short-circuiting after the terminal is assembled.

[0033] Preferably, the insulating layer 40 is also provided on the wiring portion 11 of the film base film 10 exposed between each of the copper foil wirings 21 .

[0034] In this embodiment, the insulating layer 40 is insulating ink, such as common solder resist inks such as green ink, white ink or black ink.

[0035] A reinforcing layer 50 is provided on a surface of the lead portion 12 of the film base film 10 which is opposite to the copper foil leads 22 .

[0036] The film plug-in structure of the present invention provides the reinforcing layer 50 on the surface of the pin portion 12 facing away from the copper foil pins 22 to enhance the strength of the portion and prevent the copper foil pins 22 from breaking during plugging.

[0037] In this embodiment, the reinforcing layer 50 is a PI film or a PET film, etc., and is fixed on the surface of the pin portion 12 by bonding.

[0038] A locking boss 121 is respectively provided on both sides of the pin portion 12. It should be noted that the two locking bosses 121 are centrally symmetrically distributed on both sides of the pin portion 12. It should be noted that in order to enhance the structural stability of the film plug-in structure after plugging, the locking boss 121 is provided, and the locking boss 121 is used to clamp the corresponding socket.

[0039] In this embodiment, the positioning boss 121 and the pin portion 12 of the film base film 10 are an integral structure, that is, they are formed by the pin portion 12 extending outwardly to both sides.

[0040] Preferably, the positioning boss 121 is provided with an oblique edge. It should be noted that the oblique edge is provided on the positioning boss 121 in order to facilitate the insertion of the pin portion 12 of the film plug-in structure into the corresponding socket. In this way, when the plug-in portion of the film plug-in structure is inserted into the corresponding socket, it can be guided so that it can be inserted quickly.

[0041] The wiring part 11 of the film base film 10 is provided with an elastic layer 60 on the surface of one side facing away from each of the copper foil wirings 21. It should be noted that during assembly, the terminal mainboard is generally located on the back of the touch screen (below the display screen), so during plugging, the wiring part 11 of the film plug-in structure needs to be bent 180° before the pin part 12 can be plugged into the socket on the terminal mainboard, and the elastic stretching capacity of the film base film 10 is relatively small, and the wiring part 11 may have creases after multiple plug-in bending, thereby causing the copper foil wiring 21 to break at the creases. The elastic layer 60 can increase the elastic stretching capacity of the wiring part 11 to avoid creases in the wiring part 11 after multiple plug-in bending.

[0042] In this embodiment, the elastic layer 60 is a rubber film or a silicone film.

[0043] Embodiment 2

[0044] like Figure 4 As shown, a narrow-border touch screen structure includes a first touch film 100, an adhesive layer 200 and a second touch film 300, wherein the first touch film 100 and the second touch film 300 are relatively bonded and fixed by the adhesive layer 200; at least one of the first touch film 100 and the second touch film 300 extends outward from the film plug-in structure 110, 310 described in the first embodiment.

[0045] For example, in the narrow-border touch screen structure, only the first touch film 100 may extend outwardly to plug the film plug-in structure 110 to the terminal mainboard, while the second touch film 300 is connected to the terminal mainboard through a flexible circuit board. Alternatively, in the narrow-border touch screen structure, only the second touch film 300 may extend outwardly to plug the film plug-in structure 310 to the terminal mainboard, while the first touch film 100 is connected to the terminal mainboard through a flexible circuit board. Alternatively, in the narrow-border touch screen structure, both the first touch film 100 and the second touch film 300 may extend outwardly to plug the film plug-in structures 110, 310 to the terminal mainboard.

[0046] In this embodiment, the adhesive layer 200 is OCA adhesive.

[0047] Among them, the first touch film 100 includes a first film base film and a plurality of first ITO electrodes 130, the first film base film includes a first film body 120, and each of the first ITO electrodes 130 is arranged on a side surface of the first film body 120; the second touch film 300 includes a second film base film and a plurality of second ITO electrodes 330, the second film base film includes a second film body 320, and each of the second ITO electrodes 330 is arranged on a side surface of the second film body 320; at least one of the first film body 120 and the second film body 320 extends outward from the wiring portion 11 and the pin portion 12 of the film plug-in structure 110, 310, and at least one of each of the first ITO electrodes 130 and each of the second ITO electrodes 330 is correspondingly connected to each of the copper foil wirings 21 of the film plug-in structure 110, 310.

[0048] 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 film plug-in structure, comprising a film base film, wherein the film base film comprises a wiring portion and a pin portion connected to each other, characterized in that: The film plug-in structure also includes a plurality of copper foil strips equidistantly arranged on one surface of the film base film, each of the copper foil strips includes a copper foil trace located on the trace portion and a copper foil pin located on the pin portion, wherein each of the copper foil pins is provided with a nickel-gold plating layer on a surface on a side facing away from the film base film.

2. The film plug-in structure according to claim 1, characterized in that: An insulating layer is provided on the surface of each copper foil trace facing away from the film base film.

3. The film plug-in structure according to claim 2, characterized in that: The insulating layer is also arranged on the wiring portion of the film base film exposed between each of the copper foil wirings.

4. The film plug-in structure according to claim 2, characterized in that: The insulating layer is insulating ink.

5. The film plug-in structure according to claim 1, characterized in that: A reinforcing layer is provided on a surface of the lead portion of the film base film which is away from each of the copper foil leads.

6. The film plug-in structure according to claim 5, characterized in that: The reinforcing layer is a PI film or a PET film.

7. The film plug-in structure according to claim 1, characterized in that: An elastic layer is provided on the surface of the wiring portion of the film base film on the side facing away from each of the copper foil wirings.

8. The film plug-in structure according to claim 7, characterized in that: The elastic layer is a rubber film or a silicone film.

9. A narrow-frame touch screen structure, characterized in that: It comprises a first touch film, an adhesive layer and a second touch film, wherein the first touch film and the second touch film are relatively bonded and fixed by the adhesive layer; at least one of the first touch film and the second touch film extends outwardly from the film plug-in structure according to claim 1.

10. The narrow-frame touch screen structure according to claim 9, characterized in that: The first touch film includes a first film base film and a plurality of first ITO electrodes, the first film base film includes a first film body, and each of the first ITO electrodes is arranged on a side surface of the first film body; the second touch film includes a second film base film and a plurality of second ITO electrodes, the second film base film includes a second film body, and each of the second ITO electrodes is arranged on a side surface of the second film body; at least one of the first film body and the second film body extends outwardly from the wiring portion and the pin portion of the film plug-in structure, and at least one of each of the first ITO electrodes and each of the second ITO electrodes is correspondingly connected to each of the copper foil wirings of the film plug-in structure.

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