CN212809180U

CN212809180U - Capacitive touch writing board

Info

Publication number: CN212809180U
Application number: CN202021773737.4U
Authority: CN
Inventors: 杨运生
Original assignee: Shenzhen Iboard Technology Co ltd
Current assignee: Shenzhen Iboard Technology Co ltd
Priority date: 2020-08-24
Filing date: 2020-08-24
Publication date: 2021-03-26
Anticipated expiration: 2030-08-24

Abstract

The utility model provides a capacitive touch writing board, which comprises a conductive film arranged in front of a board core and a protective board arranged in front of the conductive film; and the back of the plate core is sequentially provided with a conductive layer symmetrical to the conductive film and a back plate symmetrical to the protective plate. The utility model discloses in, use the board core to design as the symmetry principle of central line in the both sides of board core. Therefore, the extension and contraction of the material of the capacitive touch writing board are the same under different environments, and the internal stress of the composite board is balanced. The utility model discloses an electric capacity clipboard extends along with time and because of ambient temperature, humidity, sunshine shines, changes such as wind-blowing, and board stress variation is the same around the board because of the board, and face deformation and material layering, swell scheduling problem can not appear in electric capacity touch clipboard.

Description

Capacitive touch writing board

Technical Field

The utility model relates to a touch-sensitive screen field, especially a capacitance technology writing board structure.

Background

The capacitive touch screen is mainly constructed by plating a transparent thin film conductor layer on a glass screen, and then additionally arranging a piece of protective glass on the conductor layer, wherein the double-glass design can thoroughly protect the conductor layer and an inductor.

Chinese patent application publication No. CN 102221948A discloses a capacitive touch screen, which includes a multi-layer composite board structure composed of a panel layer, a working layer, and a shielding layer, and a touch IC electrically connected to the working layer. The panel layer is made of glass or other transparent high polymer, and the working layer is an ITO (indium tin oxide) line and is directly laid on the lower surface of the panel layer. The shielding layer comprises an ITO circuit layer and a thin film layer which is positioned below the ITO circuit layer and used for laying the ITO circuit layer. And the working layer and the shielding layer are bonded by adopting an optical transparent adhesive. The distance between the ITO circuit layer serving as the working layer of the capacitive touch screen and a finger touching the upper surface of the panel layer is closer, so that the touch sensitivity of the capacitive touch screen is improved; because a thin film layer and an optical adhesive bonding layer are omitted, materials and processes are saved, and the touch screen is lighter and thinner and has lower cost.

However, the multi-layer composite board structure is composed of a panel layer, a working layer and a shielding layer. The capacitive interactive electronic whiteboard (whiteboard all-in-one machine) formed by adopting the capacitive touch writing board has the following defects:

the writing board is deformed (convex, concave, wavy, warped and the like), and is not flat.

The writing board panel and the composite material bulge.

The writing board panel is layered with the composite material.

The panel of the writing board is cracked.

The writing board has poor shielding and has the problems of jumping points, explosion points and the like due to external interference.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the above-mentioned defect such as the mutual whiteboard of electric capacity (blank all-in-one) that present electric capacity touch clipboard constitutes, provide an electric capacity touch clipboard, in this electric capacity touch clipboard, the balanced setting in base member both sides has overcome the above-mentioned defect when constituteing the mutual whiteboard of electric capacity (blank all-in-one).

The utility model discloses realize that its technical purpose technical scheme is: a capacitive touch writing pad includes a conductive film disposed in front of a pad core, a protective plate disposed in front of the conductive film; the back of the plate core is sequentially provided with a conductive layer symmetrical to the conductive film and a back plate symmetrical to the protective plate;

the board core is an insulating board comprising XPS, EPS, ABS and a wood board;

the conductive film is a touch film which comprises a capacitance film, a capacitance metal grid, capacitance glass and a capacitance PCB and is changed in capacitance through touch;

the protective plate is a projectable panel subjected to surface treatment;

the conducting layer is a conducting thin film with good conducting performance and the thickness of the conducting thin film is the same as that of the conducting thin film;

the back plate is a plate with the thickness same as that of the protective plate.

Further, in the capacitive touch tablet described above: the thickness of the plate core is more than 6.0mm, the thickness of the conductive film is 1.0-5.0mm, and the thickness of the conductive film is 0.1-0.5 mm.

Further, in the capacitive touch tablet described above: the conducting film or the conducting layer is respectively adhered to two sides of the board core by adopting glue with the thickness of 0.05-0.2mm, the protecting board is also adhered to the outside of the conducting film by adopting glue with the thickness of 0.05-0.2mm, and the back board is also adhered to the outside of the conducting layer by adopting glue with the thickness of 0.05-0.2 mm.

The utility model discloses in, use the board core to design as the symmetry principle of central line in the both sides of board core. Therefore, the extension and contraction of the material of the capacitive touch writing board are the same under different environments, and the internal stress of the composite board is balanced. The utility model discloses an electric capacity clipboard extends along with time and because of ambient temperature, humidity, sunshine shines, changes such as wind-blowing, and board stress variation is the same around the board because of the board, and face deformation and material layering, swell scheduling problem can not appear in electric capacity touch clipboard.

The present invention will be described in more detail with reference to the accompanying drawings and examples.

Drawings

Fig. 1 is a cross-sectional view of a capacitive touch writing board according to embodiment 1 of the present invention.

Detailed Description

The present embodiment is a capacitive touch writing pad 100, as shown in fig. 1, like the present capacitive touch writing pad 100, the capacitive touch writing pad 100 of the present embodiment also includes a conductive film 102 disposed in front of a core plate 101, a protective plate 103 disposed in front of the conductive film 102; in this example. A conductive layer 104 symmetrical to the conductive film 102 and a back plate 105 symmetrical to the protective plate 103 are sequentially provided on the back surface of the board core 101; by such a way that the capacitive touch writing pad 100 has the same material extension and contraction amount under different environments, the internal stress of the capacitive touch writing pad 100 is balanced. The capacitive touch writing board 100 of the embodiment extends along with time and changes due to ambient temperature, humidity, sunlight, wind and the like, and the problems of board surface deformation, material layering, bulging and the like of the capacitive touch writing board 100 cannot occur because the stress changes of the front board and the rear board of the board core 101 in the capacitive touch writing board 100 are the same.

In this embodiment, the board core 101 is an insulating board, including XPS, EPS, ABS, and wood board; the conductive film 102 is used for sensing a touch, and in this embodiment, is a capacitive touch film, and may be selected from a touch film in which capacitance changes by a touch, such as a capacitive film, a capacitive metal mesh, a capacitive glass, and a capacitive PCB. The protection plate 103 is a projectable panel subjected to surface treatment; can be transparent plates such as plastic plates, glass plates, fireproof plates, off-duty steel plates, foaming plates and the like. The conductive layer 104 is a conductive thin film with the same thickness as the conductive film 102 and good conductivity; or aluminum foil, aluminum plate, steel plate, conductive film, ITO film, nano film, etc. The back plate 105 is a plate having the same thickness as the protection plate 103. It may be a plate material as the protective plate 103, but may not be subjected to surface treatment.

In the present embodiment, the thickness of the capacitive touch writing board 100 is generally between 10-20mm, wherein the thickness of the core 101 is required to be above 6.0mm, in the present embodiment, the thickness of the core 101 is 10mm as required, and the thicknesses of the front and rear boards, i.e. the protection board 103 and the back board, are between 1.0-5.0mm, in the present embodiment, a PVC board of 2mm is selected, and the thicknesses of the conductive film 102 and the conductive layer 104 are between 0.1-0.5mm, in the present embodiment, a thickness of 0.3mm is used as required.

In this embodiment, the layers are adhered together by glue. The thickness of the glue is about 0.1MM, and the transparent glue with the thickness of 0.05-0.2MM is generally adopted, and the transparent glue with the thickness of 0.1MM is adopted in the embodiment.

In this embodiment, a capacitive touch tablet is provided, wherein the layers are glued together. Ensuring that the 5 layers of material form a unitary panel. The protective plate 103 and the back plate 105 are made of the same material and have substantially the same thickness (the difference between the thicknesses is less than 0.5mm, and the material thickness is kept as same as possible). The thickness of the protection plate 103 and the back plate 105 is between 0.8 mm and 5.0 mm. The thickness of the plate core 101 is not less than 6.0mm, and the general thickness is 10-30 mm. The thickness of the conductive film 102 and the conductive layer 104 is about 0.05-0.3 mm, the thickness of the two is the same as possible, and the thickness difference is generally less than 0.03 mm. The conductive layer 104 is required to have good conductive properties.

The thickness of each layer of material of the capacitor writing board is particularly prompted to be a technical parameter for carrying out numerous experimental summaries, and the thickness of all the materials is not included. As long as the structure of the capacitance writing board is similar to that of the patent, the product which is designed and produced by adopting the symmetry principle is in the protection scope of the patent.

Claims

1. A capacitive touch writing pad includes a conductive film (102) disposed in front of a core (101), a protective plate (103) disposed in front of the conductive film (102); the method is characterized in that: a conductive layer (104) symmetrical to the conductive film (102) and a back plate (105) symmetrical to the protective plate (103) are sequentially arranged on the back surface of the plate core (101);

the board core (101) is an insulating board comprising XPS, EPS, ABS and a wood board;

the conductive film (102) is a touch film which comprises a capacitance film, a capacitance metal grid, capacitance glass and a capacitance PCB and is changed in capacitance through touch;

the protection plate (103) is a projectable panel subjected to surface treatment;

the conductive layer (104) is a conductive film with the same thickness as the conductive film (102);

the back plate (105) is a plate with the same thickness as the protection plate (103).

2. A capacitive touch tablet according to claim 1, wherein: the thickness of the plate core (101) is more than 6.0mm, the thickness of the protective plate (103) is 1.0-5.0mm, and the thickness of the conductive film (102) is 0.1-0.5 mm.

3. A capacitive touch tablet according to claim 1 or 2, wherein: the conductive film (102) or the conductive layer (104) is respectively adhered to two sides of the board core (101) by adopting glue with the thickness of 0.05-0.2mm, the protective board (103) is also adhered to the outside of the conductive film (102) by adopting glue with the thickness of 0.05-0.2mm, and the back board (105) is also adhered to the outside of the conductive layer (104) by adopting glue with the thickness of 0.05-0.2 mm.