Steering wheel functional pad body with insulation protection structure

Abstract

The utility model provides a steering wheel functional pad body with an insulation protection structure, the steering wheel functional pad body comprises a pad body, the pad body is of a layered structure, the pad body comprises at least one electric functional layer group, the electric functional layer group comprises at least one electric functional layer, and the at least one electric functional layer comprises a conductive fabric layer; the conductive fabric layer is an insulating coating layer made of a flexible insulating material, and the insulating coating layer is at least arranged on part of the edge of the conductive fabric layer through a connecting part; the power connection assembly is used for being connected with an external control assembly and electrically connecting the electric functional layer; by arranging the insulating coating layer, the conductive fabric layer is isolated from the steering wheel framework, so that the conductive fabric layer and the steering wheel framework do not contact with each other, and short circuit between the steering wheel functional pad body and the steering wheel framework is prevented.

Description

Technical Field

[0001] This application relates to the field of automotive parts technology, and in particular to a steering wheel functional pad. Background Technology

[0002] In modern automotive design, the demand for intelligent and user-friendly functions in automotive interior components is increasing. Among these, the steering wheel, as a crucial component, is also experiencing a rise in requirements for functionality and comfort. The steering wheel frame is typically made of metal, and the pads mounted on it for functions such as hands-off detection or heating require electricity to function. However, due to limitations in current manufacturing processes, conductive materials in the pads may unexpectedly come into contact with the metal frame of the steering wheel. This can cause a short circuit between the pad and the metal frame during operation, affecting the pad's normal functioning and, in severe cases, burning out the pad and posing a safety hazard. Utility Model Content

[0003] The purpose of this application is to address the above problems by providing a steering wheel functional pad with an insulating and protective structure, comprising:

[0004] The pad body is a layered structure stacked along a first direction. The pad body includes at least one electrical functional layer group, which includes at least one electrical functional layer, and the at least one electrical functional layer includes a conductive fabric layer.

[0005] An insulating covering layer, wherein the insulating covering layer is a flexible insulating material, the projection of the insulating covering layer on the pad body is at least located in the edge region of the pad body, and the insulating covering layer at least covers a portion of the edge of the conductive fabric layer;

[0006] A connecting layer is provided on one side of the insulating covering layer and is used to connect the insulating covering layer and the pad body;

[0007] A power connection component, which is used to connect an external control component to provide power to the electrical function layer.

[0008] According to the technical solutions provided in some embodiments of this application, the connecting layer is an adhesive material.

[0009] According to the technical solutions provided in certain embodiments of this application, the connecting layer is a substrate-based double-sided adhesive.

[0010] According to the technical solutions provided in certain embodiments of this application, the insulating covering layer includes a first adhesive segment and a second adhesive segment, the first adhesive segment and the second adhesive segment being respectively connected to the upper surface and lower surface of the pad body along the first direction; the connecting layer is disposed between the insulating covering layer and the pad body.

[0011] According to the technical solutions provided in certain embodiments of this application, the insulating covering layer includes a third adhesive segment and a fourth adhesive segment, the third adhesive segment and the fourth adhesive segment being respectively connected to the upper and lower surfaces of the electrical functional layer including the conductive fabric layer along the first direction; the connecting layer is disposed between the insulating covering layer and the electrical functional layer.

[0012] According to the technical solutions provided in certain embodiments of this application, the insulating covering layer includes a fifth adhesive segment and a sixth adhesive segment, the fifth adhesive segment and the sixth adhesive segment being respectively connected to the upper surface and lower surface of the electrical functional layer group along the first direction, and at least one of the electrical functional layers in the electrical functional layer group includes the conductive fabric layer; the connecting layer is disposed between the insulating covering layer and the electrical functional layer group.

[0013] According to the technical solutions provided in certain embodiments of this application, the insulating covering layer includes a seventh adhesive segment and an eighth adhesive segment, the seventh adhesive segment and the eighth adhesive segment being respectively connected to the upper surface and lower surface of the conductive fabric layer along the first direction; the connecting layer is disposed between the insulating covering layer and the conductive fabric layer.

[0014] According to the technical solutions provided in certain embodiments of this application, the pad body and / or the electrical functional layer including the conductive fabric layer and / or the electrical functional layer group and / or the edge of the conductive fabric layer have a corner region, and the insulating covering layer in the corner region includes a plurality of segmented covering layers, and the plurality of segmented covering layers are spliced ​​together to form the insulating covering layer.

[0015] According to the technical solutions provided in certain embodiments of this application, the pad body and / or the electrical functional layer including the conductive fabric layer and / or the electrical functional layer group and / or the edge of the conductive fabric layer have corner regions, and the edge of the insulating covering layer in the corner region is provided with splicing openings.

[0016] According to the technical solutions provided in certain embodiments of this application, each of the electrical functional layers is one of a capacitor detection layer, a capacitor shielding layer, and a heating layer.

[0017] Compared with the prior art, the beneficial effects of this application are as follows: This application provides a steering wheel functional cushion with an insulating protective structure, including a cushion body, the cushion body being a layered structure stacked along a first direction, the cushion body including at least one electrical functional layer group, the electrical functional layer group including at least one electrical functional layer, the at least one electrical functional layer including a conductive fabric layer; an insulating covering layer, the insulating covering layer being a flexible insulating material, the projection of the insulating covering layer on the cushion body being at least located in the edge region of the cushion body, the insulating covering layer at least covering a portion of the edge of the conductive fabric layer; a connecting layer, the connecting layer being disposed on one side of the insulating covering layer, for connecting the insulating covering layer and the cushion body; and a power connection component, the power connection component being used to connect an external power supply component to supply power to the electrical functional layer;

[0018] As can be seen from the above technical solution, by providing the insulating covering layer at the edge of the conductive fabric layer, the electrical functional layer, the electrical functional layer group or the pad body, the conductive fabric layer and the steering wheel frame are isolated from each other, so that the two do not come into contact, thereby preventing short circuits between the steering wheel functional pad body and the steering wheel frame, avoiding functional failure of the steering wheel functional pad body, and also avoiding short circuit heating and safety problems caused by the burning of the steering wheel functional pad body.

[0019] Meanwhile, since the electrical functional layer, the electrical functional layer group, or the pad body are all layered structures, when the insulating covering layer is provided at the edge of each layer, the insulating covering layer can also connect the edges of each layer together, preventing the layers from separating due to the deformation of the steering wheel functional pad during use, thus avoiding affecting the normal operation of the steering wheel functional pad.

[0020] It should be understood that the descriptions of technical features, technical solutions, beneficial effects, or similar language in this application do not imply that all features and advantages can be achieved in any single embodiment. Rather, it is understood that the description of a feature or beneficial effect means that a specific technical feature, technical solution, or beneficial effect is included in at least one embodiment. Therefore, the descriptions of technical features, technical solutions, or beneficial effects in this specification do not necessarily refer to the same embodiment. Furthermore, the technical features, technical solutions, and beneficial effects described in this embodiment can be combined in any suitable manner. Those skilled in the art will understand that embodiments can be implemented without one or more specific technical features, technical solutions, or beneficial effects of a particular embodiment. In other embodiments, additional technical features and beneficial effects may be identified in specific embodiments that do not embody all embodiments. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall steering wheel functional pad.

[0023] Figure 2 This is a schematic diagram of the connection between the insulating covering layer and the pad body;

[0024] Figure 3 A schematic diagram of the connection between the insulating coating layer and the electrical functional layer assembly;

[0025] Figure 4 This is a schematic diagram of the structure connecting the insulating coating layer and the electrical functional layer;

[0026] Figure 5 This is a schematic diagram of the connection between the insulating coating layer and the conductive fabric layer.

[0027] Figure 6 This is a schematic diagram of the structure connecting the insulating coating layer and the connecting layer;

[0028] Figure 7 A schematic diagram of the straight corner area of ​​the steering wheel functional pad;

[0029] Figure 8 A schematic diagram of the curved corner area of ​​the steering wheel functional pad.

[0030] Figure 9 This is a schematic diagram showing the splicing of segmented insulation layers in the corner area;

[0031] Figure 10 A first schematic diagram showing the splicing opening of the insulating covering layer in the transition area;

[0032] Figure 11 A second schematic diagram showing the splicing opening of the insulation covering layer in the transition area;

[0033] Figure 12 A schematic diagram showing the steering wheel frame with the steering wheel functional pad installed.

[0034] The text labels in the image represent:

[0035] 1. Pad body; 2. Electrical functional layer assembly; 3. Electrical functional layer; 4. Conductive fabric layer; 5. Insulating covering layer; 51. First adhesive section; 52. Second adhesive section; 53. Third adhesive section; 54. Fourth adhesive section; 55. Fifth adhesive section; 56. Sixth adhesive section; 57. Seventh adhesive section; 58. Eighth adhesive section; 6. Connecting layer; 7. Electrical connection component; 8. Corner area; 9. Segmented covering layer; 10. Splicing opening. Detailed Implementation

[0036] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The descriptions in this section are merely illustrative and explanatory, and should not be construed as limiting the scope of protection of this application. Specifically, the described embodiments are only some embodiments of this application, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort should fall within the scope of protection of this invention.

[0037] It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product, or apparatus.

[0038] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.

[0039] As mentioned in the background section, in view of the problems existing in the prior art, this embodiment provides a steering wheel functional pad with an insulating protective structure, comprising:

[0040] The pad body 1 is a layered structure stacked along a first direction. The pad body 1 includes at least one electrical functional layer 3 group 2. The electrical functional layer group 2 includes at least one electrical functional layer 3. The at least one electrical functional layer 3 includes a conductive fabric layer 4.

[0041] Specifically, such as Figure 1 and Figure 2As shown, the pad body 1 is a flat, sheet-like flexible pad. The first direction is perpendicular to the upper and lower surfaces of the flexible pad. The pad body 1 is composed of multiple layers, each of which is also flat and sheet-like. The side layers are connected by adhesive. Each layer includes at least one electrical functional layer group 2. The electrical functional layer group 2 includes at least one electrical functional layer 3. The at least one electrical functional layer 3 includes a conductive fabric layer 4. The conductive fabric layer 4 is composed of conductive fabric. The conductive fabric is woven from conductive material wires and insulating material wires, and has good conductivity and ductility.

[0042] Among them, the electrical functional layer 3 can be a capacitor detection layer, a capacitor shielding layer, or a heating layer. When the electrical functional layer 3 is a capacitor detection layer, it can be composed of metal wires arranged on the substrate layer, conductive fabric layer 4, or a substrate layer with metal wires and conductive fabric layer 4 together. When the electrical functional layer 3 is a capacitor shielding layer, it is composed of conductive fabric layer 4. When the electrical functional layer 3 is a heating layer, it can be composed of heating wires arranged on the substrate or conductive fabric layer 4.

[0043] When the pad body 1 includes only one electrical functional layer group 2, and the electrical functional layer group 2 includes only one electrical functional layer 3, the electrical functional layer 3 can be a capacitance detection layer composed of a conductive fabric layer 4, a capacitance detection layer composed of a substrate with metal wires and a conductive fabric layer 4, or a heating layer composed of a conductive fabric layer 4.

[0044] When the pad body 1 includes only one electrical functional layer group 2, and the electrical functional layer group 2 includes multiple electrical functional layers 3, the multiple electrical functional layers 3 can be composed of a capacitor detection layer and a capacitor shielding layer, or a capacitor detection layer, a capacitor shielding layer and a heating layer, or two heating layers, or a capacitor detection layer, a capacitor shielding layer and two heating layers, wherein at least one electrical functional layer 3 in each composition is composed of a conductive fabric layer 4.

[0045] When the pad body 1 includes multiple electrical functional layer groups 2, at least one electrical functional layer group 2 includes multiple electrical functional layers 3. The multiple electrical functional layers 3 can be composed of a capacitor detection layer and a capacitor shielding layer, or a capacitor shielding layer and a heating layer, or two heating layers, or a capacitor shielding layer and two heating layers. In each composition, at least one electrical functional layer 3 is composed of a conductive fabric layer 4.

[0046] Furthermore, such as Figure 6 As shown, the steering wheel functional cushion also includes an insulating covering layer 5 and a connecting layer 6. The insulating covering layer 5 is a flexible insulating material. The projection of the insulating covering layer 5 on the cushion body 1 is at least located in the edge area of ​​the cushion body 1. The insulating covering layer 5 at least covers part of the edge of the conductive fabric layer 4. The connecting layer 6 is located on one side of the insulating covering layer 5 and is used to connect the insulating covering layer 5 and the cushion body 1.

[0047] Specifically, the insulating covering layer 5 can be made of a flexible material that is insulating and not easily punctured, such as non-woven fabric, white yarn, or flexible film. It can effectively block the conductive fabric layer 4 and the steering wheel metal frame without affecting the appearance of the steering wheel functional pad. The insulating covering layer 5 can be connected to any of the layered structures in the pad body 1, and a connecting layer 6 is provided between the insulating covering layer 5 and the layered structure. The connecting layer 6 connects the insulating covering layer 5 and the layered structure. The insulating covering layer 5 can cover only part of the surface of the layered structure or completely cover the entire surface of the layered structure. The appropriate covering position and area can be selected according to the design and product requirements.

[0048] Among them, such as Figure 12 As shown, a transverse frame is typically installed at the 3 o'clock and 9 o'clock positions of the steering wheel. Due to the special shape of the steering wheel frame, these two positions are also the most likely locations for short circuits to occur between the steering wheel functional pad and the steering wheel frame. Preferably, an insulating covering layer 5 is installed at the 3 o'clock and 9 o'clock positions of the layered structure corresponding to any of the above combinations. This can effectively prevent short circuits between the steering wheel functional pad and the steering wheel frame, and also reduce costs.

[0049] Furthermore, such as Figure 1 and Figure 12 As shown, the steering wheel functional pad also includes a power connection component 7, which is used to connect an external control component to power the electrical functional layer 3 so that the steering wheel functional pad can be powered on or transmit electrical signals while being powered on.

[0050] Furthermore, such as Figure 6 As shown, the connecting layer 6 is made of adhesive material. Using adhesive material for connection can adapt to various shapes of the steering wheel functional pad and the insulating covering layer 5, and does not hinder deformation when the steering wheel functional pad is deformed. The connection is more flexible, convenient and easy to operate.

[0051] Furthermore, the connecting layer 6 is a double-sided adhesive with a substrate. The double-sided adhesive with a substrate has adhesive material on both sides of the adhesive tape substrate. This satisfies the need to stick the insulating covering layer 5 to the layered structure. At the same time, due to the presence of the substrate, the connecting layer 6 will not be torn when the steering wheel functional pad is deformed, which improves the reliability of the connection between the insulating covering layer 5 and the layered structure. It can also protect the edges of the layered structure covered by the insulating covering layer 5 from damage, thus improving the reliability of the steering wheel functional pad.

[0052] Furthermore, the insulating covering layer 5 includes a first adhesive segment 51 and a second adhesive segment 52, which are respectively connected to the upper and lower surfaces of the pad body 1 along the first direction; the connecting layer 6 is disposed between the insulating covering layer 5 and the pad body 1.

[0053] Specifically, such as Figure 2 As shown, the insulating covering layer 5 is bonded to the upper and lower surfaces of the entire pad body 1, which can prevent the layers of the pad body 1 from delaminating. When the pad body 1 includes multiple conductive fabric layers 4, the processing can be simplified, with only one step required to bond the insulating covering layer 5.

[0054] Furthermore, the insulating covering layer 5 includes a third adhesive segment 53 and a fourth adhesive segment 54, which are respectively connected to the upper and lower surfaces of the electrical functional layer 3, which includes the conductive fabric layer 4, along the first direction; the connecting layer 6 is disposed between the insulating covering layer 5 and the electrical functional layer 3.

[0055] Specifically, such as Figure 3 As shown, the insulating covering layer 5 is bonded to the upper and lower surfaces of the electrical functional layer 3, which includes the conductive fabric layer 4. The bonding of the insulating covering layer 5 to the upper and lower surfaces of the electrical functional layer 3, which includes the conductive fabric layer 4, can prevent the layers of the electrical functional layer 3, which includes the conductive fabric layer 4, from delaminating.

[0056] Furthermore, the insulating covering layer 5 includes a fifth adhesive segment 55 and a sixth adhesive segment 56, which are respectively connected to the upper and lower surfaces of the electrical functional layer group 2 along the first direction. At least one of the electrical functional layers 3 of the electrical functional layer group 2 includes a conductive fabric layer 4. The connecting layer 6 is disposed between the insulating covering layer 5 and the electrical functional layer group 2.

[0057] Specifically, such as Figure 4 As shown, the insulating covering layer 5 is bonded to the upper and lower surfaces of the electrical functional layer group 2, which includes the conductive fabric layer 4, thereby preventing the layers of the electrical functional layer group 2, including the conductive fabric layer 4, from delaminating.

[0058] Furthermore, the insulating covering layer 5 includes a seventh adhesive segment 57 and an eighth adhesive segment 58, which are respectively connected to the upper and lower surfaces of the conductive fabric layer 4 along the first direction; the connecting layer 6 is disposed between the insulating covering layer 5 and the conductive fabric layer 4.

[0059] Specifically, such as Figure 5 As shown, the insulating covering layer 5 is bonded to the upper and lower surfaces of the conductive fabric layer 4, which allows the seventh bonding segment 57 and / or the eighth bonding segment 58 to be sandwiched between the conductive fabric layer 4 and the layered structure adjacent to the conductive fabric layer 4, making the seventh bonding segment 57 and / or the eighth bonding segment 58 bonded to the conductive fabric layer 4 more tightly and less prone to delamination.

[0060] Furthermore, the edge of the pad body 1 and / or the electrical functional layer 3 including the conductive fabric layer 4 and / or the electrical functional layer group 2 and / or the conductive fabric layer 4 has a corner region 8, and the insulating covering layer 5 in the corner region 8 includes a plurality of segmented covering layers 9, which are spliced ​​together to form the insulating covering layer 5.

[0061] Specifically, such as Figure 7-8 and Figure 12 As shown, since the steering wheel frame is a closed annular cylindrical structure and the steering wheel functional pad is a sheet structure, in order to prevent obvious wrinkles and maintain flatness when the steering wheel functional pad is wrapped around the steering wheel frame, corner areas 8 are set at the edges of the steering wheel functional pad. Corner areas 8 include straight corner areas 8 and curved corner areas 8. When an insulating covering layer 5 is set in the corner area 8, in order to prevent wrinkles when the insulating covering layer 5 is bonded to the layered structure, the non-straight edges within the corner area 8 can be divided into segmented covering layers 9, such as... Figure 9 As shown, the straight or near-straight lines in the non-straight edge positions are covered separately to prevent wrinkles from forming after the insulating covering layer 5 is applied, thus avoiding affecting the flatness of the steering wheel functional pad.

[0062] Furthermore, the edge of the pad body 1 and / or the electrical functional layer 3 including the conductive fabric layer 4 and / or the electrical functional layer group 2 and / or the conductive fabric layer 4 has a corner region 8, and the edge of the insulating covering layer 5 within the corner region 8 is provided with a splicing opening 10.

[0063] Specifically, such as Figure 10 and Figure 11 As shown, at the non-straight edge position within the corner area 8, the edge of the insulating covering layer 5 can be provided with a splicing opening 10. When the insulating covering layer 5 is wrapped onto the corner area 8 of the layered structure, the splicing opening 10 allows the edges of the insulating covering layer 5 at the non-straight edge position to overlap with each other, avoiding wrinkles.

[0064] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. The above descriptions are only preferred embodiments of this application. It should be noted that due to the limitations of written expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this application.

Claims

1. A steering wheel functional pad having an insulating guard structure, characterized by, The application relates to a cushion body, comprising: a cushion body (1) which is a laminated structure stacked along a first direction, the cushion body (1) comprising at least one electric functional layer group (2), the electric functional layer group (2) comprising at least one electric functional layer (3), at least one of the electric functional layers (3) comprising a conductive fabric layer (4); an insulating coating layer (5) which is made of flexible insulating material, the projection of the insulating coating layer (5) on the cushion body (1) being located at least in the edge area of the cushion body (1), the insulating coating layer (5) covering at least part of the edge of the conductive fabric layer (4); a connecting layer (6) arranged on one side of the insulating coating layer (5) and used for connecting the insulating coating layer (5) and the cushion body (1); an electricity connection assembly (7) used for connecting an external control assembly to the electric functional layer (3).

2. The steering wheel function pad with an insulating guard structure according to claim 1, characterized in that, The connecting layer (6) is made of adhesive material.

3. The steering wheel function pad with an insulating guard structure according to claim 2, characterized in that, The connecting layer (6) is double-sided adhesive material with a base material.

4. The steering wheel function pad with an insulating guard structure according to claim 2, wherein The insulating coating layer (5) comprises a first adhesive section (51) and a second adhesive section (52), the first adhesive section (51) and the second adhesive section (52) being connected to the upper surface and the lower surface of the cushion body (1) along the first direction respectively; the connecting layer (6) is arranged between the insulating coating layer (5) and the cushion body (1).

5. The steering wheel function pad with an insulating shield structure according to claim 2, wherein The insulating coating layer (5) comprises a third adhesive section (53) and a fourth adhesive section (54), the third adhesive section (53) and the fourth adhesive section (54) being connected to the upper surface and the lower surface of the electric functional layer (3) comprising the conductive fabric layer (4) along the first direction respectively; the connecting layer (6) is arranged between the insulating coating layer (5) and the electric functional layer (3).

6. The steering wheel function pad with an insulating guard structure according to claim 2, wherein The insulating coating layer (5) comprises a fifth adhesive section (55) and a sixth adhesive section (56), the fifth adhesive section (55) and the sixth adhesive section (56) being connected to the upper surface and the lower surface of the electric functional layer group (2) along the first direction, at least one of the electric functional layers (3) of the electric functional layer group (2) comprising the conductive fabric layer (4); the connecting layer (6) is arranged between the insulating coating layer (5) and the electric functional layer group (2).

7. The steering wheel function pad with an insulating guard structure according to claim 2, wherein The insulating coating layer (5) comprises a seventh adhesive section (57) and an eighth adhesive section (58), the seventh adhesive section (57) and the eighth adhesive section (58) being connected to the upper surface and the lower surface of the conductive fabric layer (4) along the first direction; the connecting layer (6) is arranged between the insulating coating layer (5) and the conductive fabric layer (4).

8. A steering wheel function pad with an insulating shield structure according to any one of claims 1 to 7, characterized in that, The cushion body (1) and / or the electric functional layer (3) comprising the conductive fabric layer (4) and / or the electric functional layer group (2) and / or the conductive fabric layer (4) has a corner area (8) at the edge, the insulating coating layer (5) in the corner area (8) comprising a plurality of sectional coating layers (9), the sectional coating layers (9) being spliced to form the insulating coating layer (5).

9. The steering wheel function pad with an insulating shield structure according to any one of claims 1 to 7, characterized in that, The mat body (1) and / or the electric functional layer (3) comprising the conductive fabric layer (4) and / or the electric functional layer group (2) and / or the conductive fabric layer (4) edge has a corner area (8), and the edge of the insulating coating layer (5) in the corner area (8) is provided with a splicing opening (10).

10. The steering wheel function pad with an insulating guard structure according to claim 1, wherein Each of the electric functional layers (3) is one of a capacitive detection layer, a capacitive shielding layer and a heating layer.

Images